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Water sprayVacuum pump unitDifferent problems may arise for different uses of, so it is necessary to find out the detailed reasons for solving the problem. This article only introduces the injectionVacuum pump unitcommon problems and solutions.

Vacuum pump unitManufacturer: water spray pump "backwater"

The so-called "return water" means that all the working fluid water cannot flow into the storage tank through the diffusion pipe, but a part of the water is sprayed from the nozzle and then flows back into the emptying container.

The reasons for the "return water" can be divided into two categories: the "return water" of the new pump and the return water of the old pump. The main reasons for the "return" of new pumps are design, processing or equipment problems. For example, the throat diameter of the diffuser is too small, that is, the ratio of the throat cross-sectional area to the nozzle outlet cross-sectional area is too small; The machining accuracy of the nozzle is too low, and there are a few places where water cannot be sprayed out directionally after being sprayed from the nozzle. The nozzle is not concentric with the diffuser in the equipment; The pressure head of the circulating water pump is low and the spraying speed of the nozzle is too slow. If the new pump is in normal condition, the reasons for the "return water" phenomenon after a period of use may include: equipment and pipeline sealing is not tight. Such as gasket aging, damage, pipe rupture, loose bolts, etc.: The nozzle is severely worn and the size changes; the diffuser throat is blocked; the pump head is unstable, etc.

After finding out the cause of the problem, the method of eliminating the problem is conveniently solved. For example, when installing new pump equipment, check the size and processing accuracy, conduct air tightness test, and adjust in time; strengthen the inspection and maintenance of the old pump, and eliminate defects in time.

Vacuum pump unitManufacturer: vacuum drop.

The main reasons for the decrease in vacuum are: the nozzle or diffuser throat is too worn; or the equipment leaks; the water temperature of the eruption pump is too high, and the water saturation pressure is too high. The material load in the pumping room is too large, and the generated gas cannot be pumped out in time.

The first way to troubleshoot is: replace the nozzle or diffuser; check for spills to eliminate it. Increase cooling water city, reduce water quality. Reduce the load of processing materials and reduce the pumping load of the jet pump.

Vacuum pump unitManufacturer: Unstable vacuum

The main reasons for the instability of the vacuum degree are:(1) the bleeding part of the material in the pumping chamber changes with time, which is unstable and uniform; the nozzle, pipe or diffuser is randomly blocked; the tail pipe at the lower end of the pump penetrates into the water storage tank at an unstable depth, The air in the atmosphere sometimes turns out from the tail pipe water seal. The voltage of the pump is unstable; the impeller of the water pump is loose; the equipment oscillates violently, etc.

The main way to eliminate defects is to control the feeding speed and the parameter effect that can cause the change of material gas release; Find out the reason, eliminate random blockage, ensure more water in the water storage tank, and improve the water seal equipment. Find out the reasons for unstable power supply voltage, loose pump impeller or equipment oscillation, and try to eliminate them.

Vacuum pump unitManufacturer: disassembly steps and precautions of vacuum pump unit.

The complete disassembly and repair of a mechanical pump is called an overhaul. For some vacuum pumps that have taken partial repair measures but failed to eliminate the fault, the vacuum degree is still low and leakage still exists. Perhaps some pumps have one of the following phenomena: for example, the pump is "stuck", the oil is dirty, scale and rust are formed in the pump, or improper use of oil makes the internal parts of the mechanical pump have a hard shell (this may occur when silicone oil enters the mechanical pump), the rotor has a loud impact sound, and there are foreign matters (metal chips, glass chips, copper chips, etc.).) Falling into the pump chamber scratches the pump chamber, resulting in temperature rise due to conflict heating.