rotary vane vacuum pump of summary

Rotary vane oil-sealed vacuum pump (Rotary vane pump) is an oil-sealed mechanical vacuum pump system. Its working principle is a kind of mechanical vacuum pump, which uses vacuum pump oil to keep the sealing of moving parts and realizes pumping by changing the volume of pump chamber. Its working pressure range is 101325-1.33 *10-2 (Pa), which belongs to low vacuum pump. It can be used alone or as the front pump of other high vacuum pumps or ultra-high vacuum pumps.

Simply speaking, the rotary vane oil seal vacuum pump (referred to as rotary vane pump) is an oil seal mechanical vacuum pump. Its working principle is a kind of mechanical vacuum pump, which uses vacuum pump oil to keep the sealing of moving parts and realizes pumping by changing the volume of pump chamber. Its working pressure range is 101325-1.33 *10-2 (Pa), which belongs to low vacuum pump. It can be used alone or as the front pump of other high vacuum pumps or ultra-high vacuum pumps.

Rotary vane vacuum pump is one of the most basic vacuum acquisition equipment in vacuum technology. Rotary vane pumps are mostly small and medium-sized pumps. There are two kinds of rotary vane vacuum pumps: single-stage and double-stage. The so-called double-stage is to connect two single-stage pumps in series in order to obtain higher vacuum.

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Double-Stage-Rotary-Vane-Vacuum-Pump

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How to adjust screw vacuum pump

Screw vacuum pump is a kind of suction and exhaust equipment which uses a pair of screw to make synchronous high-speed reverse rotation in the pump housing. After a period of time, the gap of the equipment gradually occurs, which will bring trouble to the equipment. Here we will teach you how to adjust it:

How to adjust the gap

1. Screw vacuum pumps are usually twin-screw, single-suction or double-suction type of gap adjustment is different.

2. If the new pump is not worn out:

Open the gear end of the pump drive, loosen the pressure sleeve of the gear, manually adjust the clearance between the spiral sleeves and tighten the gear again, so that the relative clearance between the screw sleeves can be adjusted well, but this is a technical work without certain experience, and each manufacturer is a little different, find the original manufacturer to adjust.

3. If the adjustment of the axial clearance is mainly to adjust the adjusting gasket of the positioning bearing, but it is not necessary to adjust after the general factory.

4. If the screw sleeve or pump sleeve is worn out, it is generally not easy to solve this problem by adjusting the clearance, only parts can be replaced.

2. Factors leading to equipment replacement

1. Oil pollution is the common cause of vacuum pump failure and unstable operation. If water or acid vapor flows through the pump and the oil is kept working for a period of time.

2. There will be serious corrosion and damage to the pump. The simple way to determine the need for oil change is to connect a vacuum meter to the pump to find out whether it can reach the rated vacuum.

3. In small pumps, the black oil does not necessarily indicate that the oil has been polluted.

4. If you smell the presence of solvents, you usually need to change oil. Light brown, dark oil also indicates the presence of water. Once you have doubts, you should change oil.

In order to reduce the gap of screw vacuum pump, we should start from the daily maintenance, regular cleaning and maintenance, if the equipment reaches the deadline, then replace it. Don't think it's a minor problem that doesn't matter. Often big problems come from minor problems.

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Dry-Screw-Vacuum-Pump-in-Photovoltaic-Module-Laminating-Technology

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Vacuum-Pump-System-in-Vacuum-Drying

Filter element of vacuum pump

In this respect, it is also an important working part of the filter, and then, in terms of filtering effect, it mainly depends on the performance of the filter. There will be more filtering forms in its operation.

First of all, it will include an air-inlet filter element. In this respect, it works to a great extent, which is actually more effective in preventing solid particles and their fine ash from being sucked into the vacuum pump. In this way, to a great extent, it will directly reduce a wear phenomenon of the machinery itself, in order to improve the reliability of the operation itself. While we prolong the service life of the pump, it is actually an effective protection system itself components.

As far as the filter element of vacuum pump is concerned, it will actually include an exhaust filter element, which takes into account both the exhaust resistance and its dust capacity and the separation performance of oil and gas, and the requirements of the three are in fact able to achieve the optimal balance. Different internal and external locations should be made of different materials in anticipation of different separation purposes.

Next, as far as its oil filter element is concerned, it will be used in the imported vacuum pump to filter the lubricating oil to a great extent, so that, to a certain extent, it will directly extend the life of the oil itself mainstream filter, installed in the oil circuit.

Finally, in terms of the use and maintenance of the vacuum pump filter element, first of all, we should pay attention to the fact that should be loosened knob bolt directly on the filter shell and head separation. Be careful not to lose the rubber sealing ring and the fiber washer. Carefully remove the springs and felt gaskets of the vacuum pump equipment, followed by careful removal of the paper core.

Shredding of plastics and PVC materials is the best choice

Shredder can be used to tear and recycle PVC materials of various thickness. PVC material is used in a very wide range of plastics, and his recycling is very promising.
Shred vendors would give everyone to share the current situation of PVC recycling market, PVC is one of the most widely used plastics in the world, are widely used in the construction industry, packaging materials, household products and automotive industry. Power Protection System Small Metal Furnace For Copper

Although there has been a lot of debate about whether to ban PVC in the past decade or so, the production of PVC is still growing. Now, the discussion of PVC impact on the environment problem more and more objective, especially due to the increasingly depletion of oil resources, PVC even more attractive, because compared with PE, PVC composite materials only half from oil, the other half from the rich ore. However, the problem of PVC recycling and its potential impact on the environment have not been solved. On many occasions, the limited use of PVC still exists.Cyclical vacuum in uction melting furnace for rare metal 


Therefore, the application development and recycling of PVC must be taken seriously. The current situation of PVC recycling, the possibility of recycling is generally, plastic can be recycled, PVC is no exception, and it is being recycled.
Shredding machine all PVC materials can be recycled, our manufacturer have a video you can consult online customer service demand, you can also to our factory for actual, our factory has all kinds of PVC material, the thickness of the commissioning for your site, we use the facts to convince you.High temperature custom benchtop muffle furnace

Plastic crusher has brought great benefits to customers

  Main material is polyethylene plastic bottles of waste, plastic is close to our life, we can see traces of plastic in any place, the use of the modern plastic is far beyond the metal and wood use, consumption and far beyond the other materials. Because of polyethylene under natural conditions are difficult to oxidation, and the combustion will produce a lot of gas that is harmful to the body and material, so the environmental pollution is very serious, the famous white pollution is caused by the plastic. vacuum furnaces

  Black tea and green tea, etc are very high quality made of polyethylene plastic, it has a very high recycling value, if discarded directly not only has a lot of pollution to the environment, the data is also a kind of very unnecessary waste. For black tea bottles, green tea bottles, and so on, we can take some measures to make these materials more usable.operate latest promotion annealing sintering furnace

Plastic shredding machine can be torn for a variety of materials processing, black tea, green tea can be by shredding machine processing, such as the bottled again the use of resources, the same a bottle of black tea, if direct discard worthless, if be used to recycle again, can get very good collection, and the environmental protection also play a very important role. It is the value of these reusable garbage that can be used again by shredding machine.High vacuum gas atmosphere sintering muffle Furnace

The characteristics of the vacuum furnace temperature field

The characteristics of the vacuum furnace temperature field

The heating element of a vacuum furnace is generally round. The heat transfer in a vacuum is only radiation, no conduction and convection. There are three modes of conduction, convection and radiation in non-vacuum heating, and the convection and conduction are different from normal furnace (conventional pressure).
The pressure is less than 1 x 105Pa (absolute pressure, the approximate work pressure of the normal furnace). Working pressure close to the vacuum (pa) 2, the convection and conduction effect basic does not exist, workpiece temperature is slow, especially below 600 ℃ heating, heating more slowly, the temperature of the workpiece temperature thermocouple temperature control has certain hysteresis.
The vacuum furnace temperature uniformity measurement is different from ordinary furnace, when measuring the need to guarantee the normal work of the furnace under the condition of vacuum and pressure rise rate, can correct determination of furnace temperature. Because, unlike ordinary furnace, vacuum furnace heat transfer of actual temperature measurement process shows that the control thermocouple temperature at the beginning of the heat preservation and the effective heating area measuring thermocouple temperature difference is bigger. In vacuum condition, temperature deviation in the normal heat preservation time of the effective heating area can reach + / - 5 ℃, meet the needs of the process.

High temperature vacuum furnace

High temperature vacuum furnace

High temperature vacuum furnace refers to the vacuum furnace temperature above 1500 ℃, vacuum high temperature furnace is equipped with infrared thermometer, temperature up to 2500 ℃ and temperature control can be obtained. Vacuum furnace according to the temperature range is divided into low temperature furnace (below 650 ℃), medium temperature (650 ℃ -- 1500 ℃), high temperature furnace (above 1500 ℃).
High temperature vacuum furnace can be used for used for cemented carbide sintering, powder metallurgy and other industries, can also be used for research and development department of scientific research test, high temperature vacuum electric furnace structure affects the balance of furnace temperature, vacuum furnace for many years production experience, our company the reasonable structure of furnace body, temperature balance is good, the vacuum furnace heating correlation even, high temperature vacuum furnace, furnace temperature in good balance.

How to control the heating of molybdenum wire furnace

How to control the heating of molybdenum wire furnace

Temperature coefficient of resistance of tungsten and molybdenum materials is opposite bigger, low-temperature resistance is small, therefore made of tungsten and molybdenum materials do resistance furnace heating element in the process of cold heat, if do not use appropriate control method to produce excessive current and damage to equipment.
At present, the main component of the voltage and current control in the heating and insulation of the electric furnace is the thyristor, the fatal defect of silicon controlled is the overcurrent and the over-voltage difference.In tungsten molybdenum wire of electric furnace, the wire resistance rate at low temperatures is small, easy to produce the flow, so how to guarantee under the premise of the production process to avoid appear over current at low temperatures is of vital importance.According to many years' research and engineering practice of the author, the temperature coefficient of resistance of the larger tungsten molybdenum wire of electric heating can use manual piecewise constant pressure heat up, automatic segmentation pressure limiting temperature and pressure limiting current limit of the double closed loop heat three methods, but can not only meet the current and can meet the requirements of heating process.
Furnace in the first place at a certain temperature heating rate and the targets set by the first paragraph, because of the furnace and furnace heat absorption and heat diffusion, reaches the set temperature when the heating power and cooling rate balance, electric furnace in the process of thermal insulation, temperature in thermal process control system with proper power to maintain constant temperature control of electric furnace.Then, further increase the temperature of the heating voltage, the heating power of the electric furnace is raised, and the electric furnace enters the next phase of warming.

Vacuum furnace characteristics

Vacuum furnace characteristics

Two professional vacuum heat treatment of vacuum technology and heat treatment technology that combines an integrated, refers to the whole and part of heat treatment process in a vacuum. Our country could be divided into low, medium and high vacuum and high vacuum. At present most of the vacuum heat treatment furnace work vacuum degree in 1.33 ~ 1.33 x 10 ˉ sup3; Pa.
Industrial vacuum hot water boiler from Zurich polytechnic university in 1972 invented the basic principles of vacuum boiler. Founded in 1974 by the Japanese tanokuma polytechnic institute is developed on the basis of principle of the vacuum hot water boiler, and won the invention patent, in 1982, South Korea Fuji corporation will vacuum hot water boiler, boiler to market, become the brand of the first commercial use vacuum boiler:
Next, with the technology quickly popular in European and American countries, become a landmark greenhouse culture of new products.
The late 1980 s, Fuji, formal mass production vacuum hot water boiler, boiler, products not only domestic gained popularity in Korea, but also sells in distant markets, including Russia, China, southeast Asia, the americas, Europe and other more than 40 countries and regions.

With characteristics of vacuum furnace

With characteristics of vacuum furnace

Vacuum furnace is dry and sensitive, easy oxidation, or easy to break down material for design. You can use the internal part filled with inert gases, for some objects with complex components quick drying is particularly convenient.
Rectangular studio maximum effective volume. Microcomputer temperature controller can control temperature accurately. In the viewing room steel bulletproof double glass door to make indoor objects at a glance.
Case of open or close, can adjust elasticity. The overall shape of the silicone rubber door seal ensures a high vacuum chamber. Chamber using stainless steel (or wire-drawing sheet), to ensure the durability of the product.
Storage, heating, test, and dry with oxygen or inert gas under the environment of so they will not be oxidation. The shortest heating time, compared with the traditional vacuum drying oven, the heating time is reduced by 50% or more.

Automatic control system, vacuum furnace core processing

Automatic control system, vacuum furnace core processing

The automatic control system, have the effect of core processing vacuum furnace, specific include the following contents:
1) communicate with touch screen program. Through rs - 485 read from the touch screen operation command and parameter Settings, and translating data types used by vacuum furnace operation; The process parameters and the running state of return touch screen for each station.
2) logical handler. According to the collected signal logic, issued on the system and the control signals of running state for each station. Complete skip transportation, vacuum pump, vacuum switch of each valve, given heating, cooling fan, furnace, inflated, etc.
3) fault alarm function: according to the technological requirements, a vacuum furnace brazing furnace temperature display abnormal low (or overtemperature), thermocouple damaged or open circuit fault alarm functions, such as when there is abnormal or fault occurs, the fault alarm signal corresponding to the temperature of the point of failure and the touch screen display signal will appear flashing at the same time, to remind the operating personnel in a timely manner to adjust the brazing furnace temperature and to deal with failure.

Briefly describes the application of vacuum system industry

Briefly describes the application of vacuum system industry

Vacuum system application industries: electrical engineering, textile, CNC engraving machine, vacuum forming machine, folding machine, exposure machine, computer, semiconductor, circuit boards, batteries, capacitors, binding machine, photographic plate maker, freezing air conditioning process vacuum, packing machine, transformer, optical lens, automatic injection type, polyurethane technology, label pasting machine, printing machine, plate line, the vacuum lifter, vacuum suction cups, printing presses, VCD&DVD disc surface vacuum coating, industrial furnace, smelting and vacuum heat treatment, metal coating, vacuum welding, electron beam welding, vacuum coating, vacuum drying, such as welding, vacuum packaging industry, space simulation, scientific research, hospitals, negative pressure system, environmental protection industry, electronic industry, laboratories, plastic industry, general machinery, glass, marble, metal large heavy vacuum handling industries.

The safety of the vacuum furnace characteristics

The safety of the vacuum furnace characteristics

Vacuum furnace that vacuum heat treatment technology and comprehensive technology, the combination of the two professional heat treatment is to point to the whole and part of heat treatment process in a vacuum. Our country could be divided into low, medium and high vacuum and high vacuum. At present most of the vacuum heat treatment furnace work vacuum degree in 1.33 ~ 1.33 x 10 ˉ after Pa.
Vacuum heat treatment can achieve almost all heat treatment process, such as quenching, annealing, tempering, carburizing, nitriding, during the quenching process can realize gas quenching, quenching oil, water nitrate quenching, quenching, etc., can also be vacuum brazing, sintering and surface treatment, etc. Vacuum heat treatment furnace thermal efficiency is high, which can realize the rapid heating and cooling, which can realize no oxidation and decarburization, carburizing, can remove phosphorus crumbs on the surface of the workpiece, and has the effect such as degreasing degassing, so as to achieve the surface brightness purification effect. Generally speaking, the processed workpiece in the heating furnace is slow, and internal temperature difference is small, the thermal stress is small, so little deformation. Product qualified rate is high. Can reduce costs, have degassing effect, so as to improve the mechanical properties of the work and life. Good working environment, safety operation, no pollution and no pollution. Be processed workpiece no hydrogen embrittlement risk, to prevent surface of the titanium and refractory metal shell hydrogen embrittlement, stability and repeatability of vacuum heat treatment process. A series of advantages, the development of vacuum heat treatment equipment and process was more and more attention and applied more and more.

Vacuum brazing for tungsten carbide and cobalt titanium 40Cr steel

Vacuum brazing for tungsten carbide and cobalt titanium 40Cr steel

Cobalt tungsten titanium carbide and carbon steel 40Cr vacuum brazing welded. Vacuum brazing method is suitable for mass production of carbide cutting tools and drilling of carbide drills and the like. 
Once heated to complete multiple blade brazing of carbide cutting tools, we have a higher efficiency of brazing. Most carbide tools welding methods previously embedded in the carbon steel or low alloy steel substrate use is closely related to the use of performance cemented carbide welding process, the welding performance has a direct impact on the use of carbide effect. When vacuum brazing tungsten carbide cobalt titanium, welding residual stress must be minimized. Measures must be taken to reduce the braze welding stress can be taken to reduce brazing temperature, preheat and slow cooling, use plastic good solder, plus compensation pads, and other measures to improve the joint structure. When a large area of hard alloy brazing, regardless of intensity, should take special measures to reduce welding stress and prevent cracks.