Application of Roots vacuum pump

The practicability of Roots Vacuum Pump can be seen from the whole state of its development, so that it can continuously increase its performance advantages. In the process of strengthening the overall construction and improvement of products, it is necessary to strengthen the development state of its overall foundation. According to the actual production capacity, it is necessary to expand the production of products to improve the processing level of each component. Only in this way can we continue to provide reliable product development for users according to the market demand, and expand its overall application ability for future development.

In order to embody the practicability of Roots vacuum pump, through the promotion of the basic ability of all aspects of the product and the enhancement of the actual development of the product, under the overall strength of constantly improving the development of the product foundation, according to the effective embodiment of its production capacity, thus more reflecting the enhancement of practical application ability, and constantly improving its products. In the application effect, to effectively expand the practical application ability of the product, so as to further enhance the development of the overall practical ability, reflecting the strength of the product.

The continuous improvement of the application process is very important for the development of Roots vacuum pump. To further develop and apply Roots vacuum pump and improve its overall strength, only by relying on advanced technical performance advantages can we enhance the overall utilization of products effectively.

Performance of vacuum pump oil

1. Tightness of vacuum pump oil:

Vacuum pump oil needs to have appropriate viscosity, can make the vacuum pump start quickly at low temperature, vacuum pump oil can have good sealing at high temperature, vacuum pump oil has a low temperature rise in the pump. It does not contain light volatile components and reduces the oil return rate of vacuum pumps during operation.

2. Saturated vapor pressure of vacuum pump oil:

Saturated vapor pressure is one of the key indicators of vacuum pump oil. In a constant temperature closed container, when vapor liquid two phase is in dynamic equilibrium, the pressure term is saturated vapor pressure.

The saturated vapor pressure of oil products should be as low as possible. At the highest working temperature of the pump, the saturated vapor pressure should be sufficiently low and should be lower than the limit pressure stipulated by the vacuum pump. The saturated vapor pressure will drop by about an order of magnitude for every 20 C rise in temperature, at least 6.5 10 - 5 kPa at 60 C.

3. Limit total pressure and limit pressure of vacuum pump oil:

Limit total pressure: The total pressure produced by all substances (gases) in the vacuum pump is measured by a Pirani gauge or a thermocouple vacuum gauge. Foreign countries now attach importance to the test target of full pressure.

Limit Partial Pressure: Limit partial air pressure of the pump measured by mercury compression vacuum gauge (Maxwell gauge) and the partial pressure of the two-stage rotary vane pump should be <6 *10-5 kPa. The difference between limit total pressure and limit differential pressure is not greater than one order of magnitude. The greater the difference between the two, the more volatile components in vacuum pump oil, the worse the nature of the oil. (Note: limit total pressure and limit partial pressure are tested by two stage high grade vacuum pump).

Roots pump

After a period of operation, the roots pump (mechanical booster pump) unit produces abnormal noise, which may be caused by the following reasons:

1. The starting pressure of roots pump is too high, resulting in overheating of pump parts and damage.
2, the larger abrasive particles produced in the production process enter the roots pump and cause the wear of the machine parts.
3, the pump's position is not right, for example: tilt placed. The amount of lubricating oil in the pump is not suitable.

All the above reasons will lead to poor precision or serious pollution of the parts of the Roots pump, thus causing abnormal noise in the operation of the Roots pump.

When it is found that the pump produces abnormal noise in operation, it should immediately check whether the starting pressure of the pump meets the prescribed value, and can use ammeter to check whether the input current of the pump motor meets the rated value, whether there is abnormal high or low. It is also necessary to check the condition of the lubricating oil in the pump and whether the pump's location is suitable.

The pump disassembly procedure is as follows:
1, release lubricating oil and cooling water;
2, disassemble the coupling and motor.
3. Remove bypass and bypass valves.
4, dismantling bearings;
5. Remove front and rear cover and sealing device.
6, remove the rotating gear;
7, remove the rotor.

Pumping principle of slide valve vacuum pump

The pumping principle of the slide valve vacuum pump is similar to that of the chip pump, when the pump structure is different.

The slide valve type vacuum pump mainly uses the slide valve mechanism to change the volume of the west air cavity, so it is called Huafa pump. Sliding valve vacuum pump is a kind of old pump, but compared with rotary vane pump, it has the outstanding characteristics of high working pressure (104pa), large pumping capacity, continuous operation in harsh environment, durable and so on. Therefore, it is widely used in vacuum smelting, vacuum drying, vacuum impregnation, vacuum distillation and other industries.

At present, oil-sealed vacuum pumps are widely used in vacuum industry, mostly small and medium-sized chip selection pumps and large and medium-sized slide valve vacuum pumps. Rotary vane pumps are stuck in rotor grooves under dirty working conditions.

Although the slide valve vacuum pump has overcome this shortcoming to a certain extent, but because the distance between the center of mass of the slide valve and the center of rotation is not fixed, although some structural balancing measures have been taken, but still can not achieve complete balance, so it is difficult to eliminate vibration. In particular, the larger the capacity of the pump, the greater the vibration. At the same time, the above two kinds of pumps, especially the slide valve pump, have larger appearance size compared with their displacement.

Water ring vacuum pump

The water ring vacuum pump is actually a crude vacuum pump. In this regard, we should pay attention to the maximum vacuum that it can obtain, which is actually 2,000 ~4000Pa. In terms of its series atmospheric injector, it can reach 270~670Pa to a large extent. And, on the water ring vacuum pump, in a certain degree will be called the compressor.

Moreover, we also is to actually pay attention to in terms of water ring vacuum pump, it in the beginning, is also used as a self-priming pump, in the case of after, actually also is gradually used in petroleum, chemical industry, as well as in the machinery, mining and light industry, medicine and food and many other industrial sectors have a very good application.

In many technological process of industrial production, common also is actually refers to the vacuum filter, and will include vacuum water diversion, vacuum feed, then, is also include vacuum evaporation, vacuum concentration and vacuum resurgence and vacuum degassing equipment, water ring vacuum pump itself also is actually would steel is widely used.

And then, what we really want to do is to pay attention to the development of vacuum application technology, the water ring vacuum pump, in terms of rough vacuum acquisition, will always be taken seriously. Because the compression of the gas in the water ring pump is to a large extent isothermal, in this case, we actually have to pay attention to the extent that it's able to remove flammable or explosive gases, in addition to that, it's able to remove dusty or water-containing gases.

And then the final thing, which is in the water ring vacuum pump, is that it's going to be directly filled with a certain amount of water as its working fluid. And, as far as the impeller is concerned, it should be rotating clockwise in the direction indicated by the impeller. In fact, water will be directly thrown around by the impeller. Because of the centrifugal force on the water ring vacuum pump, it will form a closed structure.

Maintenance and repair of vacuum pump unit

First of all, the maintenance and repair of the vacuum pump unit. First of all, the purity of the protective gas filled should not be less than 99.99%. Then, in terms of vacuum pump unit equipment, to a large extent, it is important to be careful not to use flammable, explosive and corrosive gases as a protective atmosphere.

Next, with regard to the maintenance and repair of the vacuum pump unit, the surface of the equipment and the surface of the instrument should be kept clean to a large extent. Cleaning the inner wall of the furnace shall not allow the cleaning with water or with non-vacuum oil.

Next, for the maintenance and maintenance of the vacuum pump unit, the oil-water separator on the pneumatic triples above the pneumatic system should pay attention to discharge water frequently, and the vacuum diffusion pump oil should be injected in the oil-mist device. And when the equipment is used, the voltage of the whole machine should be guaranteed in the range of 350 ~ 420 V to a large extent. The three phases need to be balanced.

In addition, we should pay attention to the regulation of the vacuum pump unit or the pressure gauge at electrical contact and the thermocouple. In other words, we should always apply the diffusion pump oil, forming a film between it and the seat, so as to prevent the leakage of the equipment. The vacuum seal sealing is not allowed to be used for a long time for each part and its flange connection. The bolts of each part should be checked regularly. When the equipment is found to be loose, it should be tightened in time.

Finally, when the vacuum pump unit is working, we should pay attention to the display on each instrument and the sound of each pump. In this way, to a large extent, it is convenient for us to find out the anomalies in time and then to find out the problems. Moreover, the use environment of vacuum pump unit, eight at below 5% relative humidity, temperature is 10 ~ 40 ℃.

Maintenance of rotary vane vacuum pump unit

In terms of the maintenance of the rotary vane vacuum pump unit, the first point is to pay attention to the maintenance of the rotary vane vacuum pump unit cleaning, and the next thing is to pay attention to the prevention of debris into the pump equipment. And then the next thing you want to do is you want to keep the oil level; In the face of improper storage, water or other volatile substances into the pump equipment to affect the maximum vacuum, attention should be paid to replace the pump oil.

Then, on the oil change on the vacuum pump unit method, first of all, is to pay attention to go to the open pump running about 10 minutes, make oil loose some, then, that is, pay attention to the pump stop, this time should be pay attention to the oil drain Kong Fang oil, to open air inlet running a 1 ~ 2 minutes, in the midst of this, namely from inspiratory mouth slowly add a small amount of clean oil pump, this also is to actually change the pump cavity of remaining oil.

Followed by vacuum pump unit maintenance, should pay attention to can not be mixed with diesel or gasoline and other full with relatively large oil vapor pressure, at that time, namely can reduce its limit vacuum, unpick and wash of pump parts, typically with gauze polishing the test also is ok, there will be a metal debris, sand, mud or other hazardous substances must be clean, we should actually is also should pay attention to is to use gasoline to scrub, also can undertake assembly after drying.

In addition, if the pump needs to be disassembled and cleaned or overhauled, it is necessary to pay attention to the disassembly steps, so as to avoid damage to the parts.

Finally, as far as the vacuum pump unit is concerned, other objects should not be placed. In the following part, it is very important to pay attention to whether the belt is elastic enough, and it should be adjusted every half a year. Check if there is air leakage on the pipe joint of the vacuum pump unit, it should be stopped in time.