Axial force of screw vacuum pump

The axial force of the screw vacuum pump may be caused by the uneven pressure on the suction and discharge ports, resulting in uneven pressure on both sides of the impeller, which is not completely symmetrical and produces axial force. But how to solve the axial force? 

Although we need to clean up the axial force of the screw vacuum pump, if we clean it thoroughly, the rotor will rotate unsteadily. Therefore, it is necessary to compensate the amount of 30 by bearing in the design, so that the bearing at the non driving end of reciprocating vacuum pump is usually angular contact bearing, because this method can be used to withstand higher axial force.

The general solution is to symmetrically install the balance disk and impeller of the screw vacuum pump, and the single-stage pump generally has a balance hole on the impeller. Secondly, there is a way to install balance blades on the impeller to balance the axial force.

Screw vacuum pump will be affected by many factors in the process of operation. Any small problems may affect the normal operation. Therefore, regular inspection and maintenance are needed to avoid problems and reduce efficiency.

Water Ring Vacuum Pump Structure

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

reciprocating vacuum pump of parts

In terms of structure, the cylinder of the compressor is extremely diverse. According to the pressure, gas transmission, type, scheme and use of the tightening machine, cooling method, data for making cylinder, possibility of production and traditional habits of the manufacturer, cylinders can be made in various ways. 

The heating of the cylinder is uneven: the temperature of the pressing out side is higher than that of the suction side. For large diameter cylinder, the sliding support at the pressing out side should be provided with water cooling to avoid skew.

For low and medium pressure below 50 gauge pressure and small-scale cylinder below 80 gauge pressure, cast iron can be used; for pressure below 150 gauge pressure, cast steel is used; for higher pressure, carbon steel is used. For 500 gauge pressure and higher, the cylinder system is forged with alloy steel.

The cast iron cylinder with compact volume, water jacket and channel connecting the valve with the intake and the outlet is a disordered double or three-layer casting.

In order to reduce the loss of aerodynamic force, the passage in the cylinder should be streamlined to reduce the loss of aerodynamic force. Because of the pulsating nature of the air flow in the piston compressor, the loss of this element can reach a large value.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Attention to details of vacuum unit

Many places can not do without the use of vacuum pump units, but also in use, some places are easy to be ignored, in order to prevent users from bringing some unnecessary losses during the use, it is necessary to understand: what places are easy to be ignored in the use of vacuum pump units? 

General vacuum pump unit will choose the pump head is very high. For centrifugal water ring vacuum pump, after determining the model, the power consumption is directly proportional to the actual flow of the pump. The flow rate will decrease with the increase of lift, such as high head, small flow rate and low power consumption.

In order to prevent motor overload, the vacuum pump unit will require the actual pumping head of the vacuum pump, which can not be 60% lower than the rated head. Therefore, when the high head is used to pump water with too low head, the motor capacity will be overloaded, and in serious cases, the motor will be burned. In emergency use, to connect a gate valve to adjust the water flow on the outlet pipe, so as to reduce the flow and prevent overload of the motor.

It should be noted that if the motor temperature rise, the motor is too hot, it is necessary to turn off the water outlet flow or shut down in time. Many people will misunderstand this, some operators will feel: blocking the water outlet, forced to reduce its flow, can increase the motor load. This is not the case at all. Therefore, in the use of vacuum pump units, the problem of motor temperature rise should be solved in time.

What Are The Applications Of Vacuum Pump In Papermaking Industry

Claw Vacuum Pump Long Term Heating Causes

Water Ring Vacuum Pump Insufficient Suction Causes 

Oil lubricated screw vacuum pump

Oil lubricated screw vacuum pump is a series of new intelligent and efficient vacuum pumps, and is connected with variable speed drive (VSD). "Plug and play" is designed on the basis of these principles. Oil lubricated screw vacuum pump, vacuum is provided by engineers under the maximum working pressure performance, the most common in industrial applications.

Ultra low back pressure, low power consumption; at about 50 %The combination of reduced energy consumption, technology leadership, variable speed drive and innovative design provides a significant increase in engine efficiency and a reduction in life cycle costs compared to dry rotary vane vacuum pump lubricants; quiet running noise level data correspond to approximately half of the technology; due to the sustainable development of productivity, comprehensive efficiency is achieved. Reduce the impact on the environment due to the very high oil kept at all working pressures at the maximum pressure from atmospheric pressure;

Roots And Dry Screw Vacuum System In Oil Deacidification

Vacuum Butterfly Valve In Vacuum Valve

Roots Vacuum Pump Bearing

Main features of stainless steel magnetic pump

Stainless steel magnetic pump (hereinafter referred to as magnetic pump) is a new product which uses the working principle of permanent magnetic coupling for centrifugal pump. It has reasonable design, advanced technology, full sealing, no leakage and corrosion resistance, and its performance reaches the advanced level of foreign similar products.

The static seal is used to replace the dynamic seal in the magnetic pump, so that the overflow parts of the pump are completely sealed, which completely solves the problems of the mechanical seal of other pumps, such as running, emitting and dripping. Magnetic pump uses corrosion-resistant, high-strength engineering plastics, corundum ceramics, stainless steel as manufacturing materials, so it has good corrosion resistance, and can make the medium to be transported free from pollution.

Magnetic pump has compact structure, beautiful appearance, small volume, low noise, reliable operation and convenient maintenance. It can be widely used in chemical, pharmaceutical, petroleum, electroplating, food, national defense, scientific research institutions, metallurgy, dyes and other units to pump acid, alkali, oil rare precious liquid, poison, volatile liquid, as well as circulating water equipment and filter matching. In particular, easy to leak, flammable, explosive liquid pumping. The pump is more ideal for explosion-proof motor.

Roots Blower For Material Handling

Liquid Ring Vacuum Pump Disassembly And Assembly

Roots Vacuum Pump Operation

ejector in vacuum blowdown system

There are two kinds of ejectors used in vacuum blowdown system: atmospheric ejector and water ejector (jet pump).

Mobile vacuum toilet usually uses the high-pressure air supply provided by vehicles to produce vacuum through atmospheric ejector, which can reach -0.04mpa ~ -0.05mpa. It has the advantages of simple structure, no moving parts, low price and high reliability; the disadvantage is that the working efficiency is not high. It should be noted that in order to avoid affecting the normal braking of the vehicle when using the atmospheric injector, it is necessary to strictly calculate the air consumption of the atmospheric injector, and increase the air storage tank if necessary. However, it is relatively convenient when the air source of trains and ships is abundant.

The water ejector is mostly located in the vacuum tank or outdoor water collection unit, which takes the gas-liquid mixture collected in the vacuum pipeline as the injection fluid, and the working fluid is the circulating sewage driven by the water pump. This method has been widely used in early design, but it is rarely used at present. At the same time, the water ejector design can also be used in the vacuum toilet system of mobile vehicles.

Water Ring Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Precautions for using vacuum compressor

① Always pay attention to the change of gas pressure and temperature at all levels, whether the temperature of lubricating oil and bearing exceeds the allowable value, and the change of current and cooling water temperature.

② Switch the oil filter regularly, check and analyze the quality of lubricating oil regularly, and replace the new oil if it does not meet the requirements.

③ Always keep the parts complete and intact, and keep the body clean and sanitary.

④ Carry out scheduled maintenance on time and implement the maintenance system seriously.

⑤ Regularly check the efficiency of oil separator and cooler, and check and repair if the efficiency is reduced.

⑥ The standby compressor should be kept in good condition. When the compressor is out of service for a long time, it should be run empty once a half month for half an hour.

Water Ring Vacuum Pump manufacturers

Water Ring Vacuum Pump

Oil Diffusion Vacuum Pump

Single nozzle oil diffusion pump

The structure and principle of the diffusion pump are evaporator at the bottom and the diffusion pump oil is stored in it. The upper part is the air inlet, the right side pipe is the air outlet, and the mechanical pump provides the pre vacuum at the air outlet during operation. When the oil is heated by the electric furnace, the generated oil vapor is transmitted along the

The flow tube is ejected downward through the umbrella nozzle. Because there is vacuum (10-2 ~ 10-3 Torr) provided by mechanical pump outside the nozzle, the oil steam flow can be ejected for a long distance and hooked into a jet moving towards the air outlet. When the jet finally touches the wall cooled by cooling water, it will be given a liquid rest and flow back to the evaporator for reuse.

Once the gas molecules entering the pump from the air inlet fall into the steam flow, they will obtain the downward movement and fly down. Because the jet has high speed (about 200m / s), high vapor density (several to dozens of Torr of vapor pressure), and the diffusion pump oil has high molecular weight (350-500), it can effectively take away gas molecules. Therefore, in the jet interface, gas molecules can not stay for a long time, and its concentration is very small. In other words, on both sides of the jet interface, the extracted gas has a large concentration difference. It is this concentration difference that causes the energy source of the extracted gas to continuously cross the interface, diffuse into the jet and be taken to the outlet. There, they are taken away by mechanical pumps.

industrial vacuum pumps,vacuum furnaces

Dry Type Oilless Vacuum Pumps

Rotary Vane Vacuum Pump

The application of vacuum pump in CNC

The engraving machine is abbreviated as -CNC, which is used for high-precision processing of mobile phone touch screen glass, acrylic, and mobile phone shell aluminum parts. A vacuum is required to adsorb and fix the processed parts during the processing process.

The CNCs we are in contact with are divided into single-headed and double-headed. Currently, the market is dominated by double-headed CNCs. According to the different processing objects, the following will briefly introduce this.

In order to process touch screen glass (acrylic) CNC, such products require cutting fluid, because a large amount of cutting fluid cools the tool and the processed parts during the processing. The cutting fluid may be pumped to the vacuum pump. If the vacuum pump is lubricated with oil, the liquid will easily damage the vacuum equipment as soon as the liquid comes in contact with the oil, or the saturated gas for a long time will also cause emulsification of the vacuum pump oil and cause equipment damage; so now general users Both use water ring vacuum pumps.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

SSR Roots Type Blowers

How to choose roots vacuum pump correctly

How to choose a good roots vacuum machine? What should we pay attention to? But to choose roots vacuum pump, we need to choose the right pressure, otherwise it will not play a role in the enterprise. Here is a small compilation to share the knowledge about roots vacuum pump for you. How to choose roots vacuum pump correctly?

It is very important to choose the speed ratio between roots pump and the front pump of roots pump vacuum unit. Because the compression ratio of Robo pump is very limited. This compression ratio determines the capacity of the previous pump, because the compression ratio is the inverse ratio of the pumping speed of the two pumps. Generally, the compression ratio is selected within 2-10. In addition, we should consider the requirements of pre pumping time. Vacuum equipment is used as auxiliary equipment in all kinds of mechanical equipment. If the normal working time is much longer than the pre pumping time, a smaller front stage pump can be selected (the compression ratio can be larger). If the vacuum is larger and it is required to pre pump quickly, a larger front stage pump will be used. Sometimes, in order to give full play to the efficiency of the equipment, a larger pre pumping pump is installed in front of the unit, which is stopped after normal operation, and maintained by a smaller pre pump, so as to save power.

The requirements for the limit pressure of Roots vacuum pump unit are also necessary to be considered when selecting the front pump. The high requirements for the limit vacuum degree (up to 1 × 10-3 PA ~ 1 × 10-2Pa pressure) are generally selected as the front pump by the two-stage rotary vane oil seal mechanical pump or the two-stage sliding Yan mechanical pump. The mechanical pump with single-stage oil seal can be used as the front pump when the limit vacuum is between (1 × 10-2Pa ~ 1 × 10-1pa), and the reciprocating vacuum pump or liquid ring vacuum pump can be used as the front pump when the limit vacuum is between 133 ~ 1333pa.

Dry Screw Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Roots Vacuum Pump

Market potential of dry screw vacuum pump

At present, the application of dry screw vacuum pump is very extensive, and the demand is infinite, so the development prospect of dry screw vacuum pump is also excellent, mainly from these aspects. The development prospect of the total dry screw vacuum pump is very good.

In the future, for the oil industry in oil production, oil transportation and oil refining, the demand for high-efficiency water injection pump, heavy oil pump, oil pipeline pump and screw pump will increase greatly, and the demand for different types of industrial pumps will be about 140000-150000 sets. For the three chemical pumps, the market for large-scale fertilizer Methylamine Pump, large and medium-sized high-temperature and high-pressure magnetic pump, and special material non-metallic chemical pump will also expand, and the demand for all kinds of chemical pumps will be 100000-120000.

At present, the model of dry screw vacuum pump is used in many working occasions. The whole adaptability of dry screw vacuum pump is strong and its efficiency is high. Recently, the design trend of dry screw vacuum pump is mainly designed for specific working conditions, which is more targeted, and the designed screw pump has high efficiency.

Dry screw vacuum pump is widely used in many industries, such as chemical plants, mines, pharmaceutical plants, food factories and so on. Now the application of dry screw vacuum pump is very extensive, the demand is infinite, so the development prospect of dry screw vacuum pump is excellent.

Water Ring Vacuum Pump

Dry Type Oilless Vacuum Pumps

Dry Scroll Vacuum Pump

water ring vacuum pump unit isolation treatment

Vacuum pump is a kind of equipment that will be applied in many industries, and it plays an increasingly important role. However, in the process of use, it is inevitable that it will have such or such problems. When facing these problems, we must be patient to deal with them, because only in this way can it give full play to its use advantages, as well as for water ring vacuum pump unit , let's talk about its corresponding isolation processing. I hope this article will help you.

First of all, we should check whether the work is normal; whether there is leakage point in the vacuum system; at the same time, check whether the pipeline of the vacuum system and the continuous vent pipeline of the low pressure heater are damaged, whether the vacuum breaking valve is closed tightly, whether the sealing water is normal, and whether the steam supply pressure of the shaft seal is normal; Check whether the steam inlet valve, diverter valve and load relief valve of the shaft seal are normal, whether the water seal of the shaft is normal, whether the shaft heater fan is in fault or the negative pressure of the shaft heater is low, start the standby fan, check whether the exhaust system of the small turbine is normal, if necessary, start the electric pump, stop the small turbine and close the exhaust butterfly valve.

Check whether the sealing water of the condensate pump is normal and whether the condensate pump leaks air; whether the water level of the condenser is too high; if the vacuum of the condenser drops to - 87kpa, the standby water ring vacuum pump unit will start automatically, otherwise it will be put into operation manually; if the vacuum continues to drop, the load shall be reduced; if the vacuum drops to - 84kpa, the load shall be reduced to zero; if the vacuum drops to - 81kpa, the trip protection shall act, otherwise, the shutdown shall be manually tripped.

Dry Type Oilless Vacuum Pumps

Rotary Vane Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Characteristics of industrial roots water ring vacuum unit

Roots water ring vacuum unit is composed of Roots vacuum pump as the main pump and water ring vacuum pump as the front pump in series.

For roots water ring vacuum unit, it is more advantageous to select water ring vacuum pump as the front pump than other vacuum pumps. It overcomes the limit pressure difference when a single water ring pump is used (the limit pressure of the unit is much higher than that of the water ring pump) At a certain pressure, the defect of low air extraction rate, together with the advantages of rapid operation of roots pump, has a larger air extraction rate, especially suitable for pumping a large number of condensable mixed fatty acid steam.


Characteristics of roots water ring vacuum unit

① In the unit, there is a certain gap between the rotor and the pump cavity, and between the rotor and the rotor, so they do not touch each other and do not need oil lubrication

② The rotor of roots pump has a good geometric symmetry, which can improve the speed of rotation, and thus can produce a large pumping speed pump with compact structure

③ Roots vacuum unit has small vibration and large volume during operation

④ In the cavity of Roots vacuum pump, there is no compression phenomenon like mechanical vacuum pump, so it does not need exhaust valve. Because of this, the condensable fatty acid steam can be removed

⑤ When roots vacuum unit operates, it can start quickly, reach the limit vacuum in a short time, with small power and low maintenance cost

⑥ Roots pump has a large pumping speed in a wide pressure range (1-1000 PA), which can discharge the distilled gas quickly

Pump For Brick And Ceramic Industry

Pump For Surface Treatment

Water Ring Vacuum Pump

reciprocating vacuum pump Overview and principle

reciprocating vacuum pump Overview and principle

Limit vacuum of reciprocating vacuum pump (also known as piston vacuum pump), single stage is 4 x 102pa-103pa, double stage can reach 1pA, pumping speed range is 45m3 / h-20000m3 / h, which is used to extract gas from sealed container. The degree of extracted gas is not more than 35t. If auxiliary equipment, such as freezer, is added, swallow gas can also be extracted. The reciprocating vacuum pump has a large exhaust T, which is mainly used for vacuum impregnation, liquid steel vacuum treatment, vacuum distillation, vacuum Yanfa, vacuum concentration, vacuum crystallization, vacuum dry bath, vacuum filtration and vacuum operation of concrete.

Reciprocating vacuum pump is not suitable for pumping corrosive gas or gas containing granular dust. If there is dust in the aspirated valve, a filter must be installed at the inlet of the pump.

The oil-free reciprocating vacuum pump uses the piston ring and sealing ring of self-lubricating material, so there is no need to add oil for lubrication in the cylinder; an oil separation chamber is added between the cylinder and the engine body (its length is greater than one stroke length) to prevent the lubricating oil in the engine body from leaking into the cylinder along the piston rod, so the pump pairs the pumping system. Oil free reciprocating vacuum pump has vertical and horizontal structures.

The working principle of reciprocating vacuum pump is mainly composed of cylinder and piston which do reciprocating linear motion. The driving of the piston is done by the crank connecting rod. In addition to the above main components, when the exhaust valve and the suction valve are in operation, the piston in the cylinder will do reciprocating motion under the drive of the motor through the function of the crank connecting rod mechanism. When the piston moves from the left end to the right end in the cylinder, as the volume of the left cavity of the cylinder increases continuously, the density of the gas in the cylinder decreases, and the process of air extraction is formed. At this time, the gas in the container enters the left cavity of the pump body through the suction valve. When the piston reaches the right position, the cylinder is completely filled with gas. Then the piston moves from the right end to the left end, and the suction valve is closed. The gas in the cylinder is gradually compressed as the piston moves from right to left. When the pressure of the gas in the cylinder reaches or slightly exceeds the atmospheric pressure, the exhaust valve 4 is opened to exhaust the gas to the atmosphere and complete a working cycle. When the piston moves from left to right again, it sucks in a part of gas, and repeats the previous cycle, and so on, until a stable equilibrium pressure is reached in the pumped container.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

High frequency discharge in vacuum system

High frequency discharge is the discharge form caused by the existence of high frequency alternating electric field between two electrodes. When alternating voltage is applied to both ends of the discharge tube, the electrons and positive ions in the gas will generate additional harmonic vibration under the action of alternating electric field. Because the mass of positive ion is much larger than that of electron, the amplitude of harmonic vibration is very small. When the frequency is low and the amplitude of harmonic vibration is far greater than the distance between the two poles, the electron goes through the whole process of collapse, discharge and extinction in each half cycle, and the discharge condition is the same as that of DC. When the frequency is high, the amplitude of the harmonic vibration is much smaller than the distance between the two poles, and the ionization ability of the electron will be greatly enhanced because of the constant back and forth motion of the electron. Because of the small amplitude of the electronic harmonic vibration, the number of electrons entering the electrode will be greatly reduced. In this way, the electrons of gas self-sustaining discharge will not be provided by the secondary electrons produced by the electrode, but by the electrons produced by ionization when the electrons move back and forth. At this time, although a small number of positive ions and photons bombard the electrode to produce secondary electrons, the vibration direction of the secondary electrons is sometimes the same as the direction of the electron flow into the electrode, sometimes the opposite, because the polarity of the two electrodes is constantly changing. Therefore, it is not conducive to ensuring self-sustaining conditions.

This kind of high-frequency discharge, as long as there is a high-frequency electric field, can be formed. It is not necessary to use electrodes, so it is also called electrodeless discharge. The electrodeless discharge can be formed not only in alternating electric field, but also in alternating magnetic field. Because the alternating magnetic field can produce a disastrous electric field, the electrons in the gas produced by the residual ionization accelerate around the magnetic field line under the action of the eddy electric field, resulting in a large number of ionization. When the magnetic field direction is along the axis of the discharge tube, the eddy electric field will gradually weaken along the radius direction, and the ionization ability of electrons will also weaken along the radius direction, thus forming the concentration gradient of electrons and ions along the radius direction. Under the action of concentration gradient, electrons and ions diffuse from the axis to the tube wall. Because the electron diffusion is faster than the ion diffusion, the positive potential appears at the axis and the negative potential appears at the tube wall, which in turn produces the electrostatic field from the axis to the tube wall. Therefore, there are two kinds of electric fields in the discharge tube, one is the eddy electric field around the magnetic field line, the other is the electrostatic field from the axis to the tube wall. Under the simultaneous action of these two electric fields, electrons move around the axis and expand towards the tube wall, resulting in a series of concentric rings. Due to the different energy levels and numbers of electrons excited on different radii, rings with different radii have different colors.

The ignition voltage of high frequency discharge is the amplitude of the alternating potential difference on the electrode when the discharge occurs. The amplitude of this voltage is lower than the ignition voltage of DC discharge. The electric field strength of high frequency breakdown is related to air pressure. The higher the air pressure is, the stronger the breakdown electric field is and the higher the breakdown frequency is. High frequency discharge is widely used in radar and pulse technology.

Low Medium Vacuum Obtaining Equipment

How To Select Acid Resistant Vacuum Pump Type

Water Ring Pump

Features of Roots vacuum pump

Roots vacuum pump is a kind of pump caused by two "8-shaped" relative rotating rotors, which causes volume change to produce vacuum, so it is also called positive displacement pump. During operation, it is necessary to have a continuous contact line at the point where the rotor of the pump is required to engage, so as to prevent gas from flowing back from the vent to the vacuum pump. Therefore, it is necessary to check the engagement of the two rotors frequently during operation. With the extension of construction time, the impeller has been worn for a long time, and restricted by the directional rotation, forming the non-uniformity of meshing space between the two impellers, and even collision, making the impeller appear a circular and solitary external depression.

1. It is necessary to install roots vacuum pump in a dry, well ventilated and clean place.

2. The ambient temperature of Roots vacuum pump is 5-40 ° C.

3. Roots vacuum pump has necessary horizontal device, and there should be enough space around for daily inspection and maintenance, so it is easy to install and disassemble.

4. After connecting the power supply, the direction of the motor shall be as shown by the direction arrow on the pump.

5. It is necessary to clean the pipes connecting the pumping vessel. There should be no impurities and other foreign matters, the diameter of the hole should not be less than the diameter of the pump port, and the length should be short to ensure that it has enough conductivity, and the pipe connection is necessary to seal.

6. It is necessary for the gas to be pumped to be free of solid particles entering the pump room.

Therefore, the two impeller rotors are worn in different degrees in terms of outer diameter and length, and the gap between the impeller rotor and the shell is also increased. Therefore, the vacuum degree of Roots vacuum pump is reduced, and the time is large and small. It is necessary to adjust and adjust the clearance between the impeller and the clearance between the end cover and the pump housing in time.

Roots Vacuum Pump

Piston Vacuum Pump

industrial vacuum pumps,vacuum furnaces

How to apply screw vacuum pump

In the long-term use of screw vacuum pump, there may be problems: oil return. In addition to the screw vacuum pump without check device, this phenomenon is more obvious when the screw vacuum pump stops working. Taking measures in time can reduce the loss. The placement position of the screw vacuum pump has nothing to do with the return oil.

When the pump stops, the oil circuit is cut off, the negative pressure in the vacuum pump cavity of the pump is eliminated, the liquid level difference is reduced, and the oil return quantity is reduced. This is the basic principle to prevent oil return. The shaft seal and static seal of the screw vacuum pump shall be reliable and replaced when appropriate. The oil near the exhaust valve of the screw vacuum pump shall be separated from the rest of the oil. The oil level is only slightly higher than the partition wall?

The surface of the valve seat of screw vacuum pump should be flat, and the elasticity of the valve plate should be good? Set check valve structure, screw vacuum pump will automatically close the oil inlet when it stops, move the fuel tank and exhaust valve to one side to reduce the oil level and oil volume, add a pipe in the oil hole of screw vacuum pump, so that the oil level is only slightly higher than the oil inlet.

Screw vacuum pump suction valve? Screw vacuum pump and auxiliary structure are set to cut off the oil circuit when the pump is stopped? After stopping the pump, the suction port can be filled with gas to ensure the pressure balance at both ends of the screw vacuum pump. It is recommended to replace the check valve at the air inlet. Because of the vacuum pumping, when the screw vacuum pump stops running, the air pressure in the vacuum cavity is lower than the external pressure, the oil in the screw vacuum pump will be pumped out, resulting in oil return.

Dry Scroll Vacuum Pump

Dry Screw Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Explain the advantages of water ring vacuum pump

The water ring vacuum pump is equipped with an axial force motor rotor with fixed blades, which throws water (liquid) to the stator wall of the motor. The water (liquid) occurs in the same boat with the stator of the motor. The liquid ring and the rotor blades of the motor form a variable capacity imported true air pump. So what are the advantages of water ring vacuum pump? Here is a specific introduction.

The structure is simple, the production accuracy is not high, very simple production and processing; the structure is compact, the pump speed is relatively high, usually can be directly connected with the motor, without speed reduction equipment. Therefore, with a small structure standard, it can have a large displacement and a small floor area; most of the compressed air is isothermal, that is, the temperature of the whole process of the compressed air changes little; because there is no metal material conflict with the surface layer in the pump cavity, it is unnecessary to carry out the humidification in the pump, and the damage is not big.

The airtightness of the rotating parts and the fixed card center can be immediately carried out by the exhaust valve; the water ring vacuum pump also has the advantages of uniform suction, stable and reliable operation, convenient use, quick maintenance, etc. Together with the water ring vacuum pump is mainly used in coal, chemical plants, pharmaceutical industry, mining, paper industry, food, wine, decoration building materials, plastics, metallurgy, electrical and other industries.

Water Ring Vacuum Pump

Water Ring Vacuum Pump manufacturers

What is water ring vacuum pump

Water ring vacuum pump with air ejector

The air ejector is a pre air ejector on the inlet pipe of the water ring vacuum pump. One end of the air ejector is open to the atmosphere. The air jet generated by the pressure difference between the negative pressure of the vacuum pump and the atmospheric pressure is used to obtain a lower suction pressure in the ejector than the vacuum pump, so as to eliminate the limitation of the "suction pressure" of the vacuum pump on the pressure improvement of the condenser. In practical application, it can be used to increase the pressure of equipment and expand its working range.

The suction area is in a vacuum state, the water after local vaporization rotates with the impeller, the pressure rises and the bubble breaks, and local cavitation occurs on the impeller surface. After the water ring vacuum pump is equipped with an air ejector, the air flow of the pump suction is greatly increased, and the pressure in the suction area of the vacuum pump is much higher than the "suction pressure" corresponding to the water ring water temperature. When the generator unit operates in winter, the pumping performance of the whole vacuum pump unit will be better, so the condenser vacuum can still be guaranteed at the current level or higher, but the internal vacuum degree of the equipment body is only At about 12kpa, the cavitation is effectively avoided, and the operation condition of the equipment is relatively stable, so the noise is smaller.

The cavitation of the vacuum pump after the installation of the air ejector can be effectively contained, that is, the service life of the equipment is extended, the operation reliability of the equipment is improved, and the safe operation of the unit is more guaranteed.

Rotary Vane Vacuum Pump

Dry Scroll Vacuum Pump

industrial vacuum pumps,vacuum furnaces

Flow and head of circulating water pump

The flow determination of circulating water pump should follow the following principles

(1) When circulating water by-pass filtration is adopted, the maximum hourly water consumption plus by-pass filtration shall be the maximum hourly design water consumption of circulating water pump

(2) When circulating return water bypass filtration is adopted, the maximum hourly water consumption shall be the maximum hourly design water consumption of circulating water pump. Determine the head of circulating water pump. The total head of circulating water pump shall include the sum of the following values.

(1) The elevation difference between the allowable lowest water level elevation (or lowest water pressure elevation) at the water pump suction pipe and the terrain elevation at the most unfavorable point in the system. (Note: the most unfavorable point refers to the highest total head of water pump calculated according to this point)

(2) The required working water pressure at the most unfavorable point.

(3) Head loss of water pump suction and discharge pipes (including system pipes).

(4) The sum of head loss plus suction height and steam partial pressure of suction pipe shall be less than the allowable suction height provided by pump sample.

Water Ring Vacuum Pump For Vacuum Refining

Water Ring Vacuum Pump In Vacuum Negative Pressure System

Water Ring Pump