(5) high power exceeded. Can be long-term continuous for the inlet pressure is too high, the exhaust pressure is too high, debris into the occlusion occurs, the pump temperature is too high, the rotary vane with the gap is too small, the voltage is too high, too much pump back into the pump caused, Will damage the motor. Should try to avoid long-term continuous operation near the maximum power. If there is sediment on the surface, remove it regularly. (6) The ultimate pressure is not up to standard. It can be caused by external leakage, internal leakage, blockage of oil hole, poor or deteriorated quality of pump oil, condensable substances such as water vapor, distortion of instrumentation and abnormal pump operation. More leakage, the exhaust can see the white steam. There are more bubbles at the oil mark, hand exhaust pressure on the exhaust can feel. Low-level exhaust valve at the surface there are more bubbles. Power will increase. At this time, first check whether the gas ballast valve is closed. As the new pump factory in the pump each port to measure the ultimate pressure, so if the leakage phenomenon, the pump port and piping, valves, containers one by one inspection. Outer shaft seal failure, oil cup oil-free, gas-filled head can also cause leakage. The internal leakage can be caused by the movement gap in the pump, the plane of the exhaust valve seat, the sealing surface of the exhaust valve, the inner shaft seal, the plane of the pump cover, the air inlet pipe and the gas valve seal. Wear, corrosion, bite will increase the operating gap. When the oil hole is blocked, open the oil hole to hear the noise of the pump will be lighter. If the oil seal is good, the exhaust valve may fail if the hand is sucked on the exhaust port. If the pump oil clean, unused long-term storage, open the town valve to purify the water vapor pump. If invalid, should check apricot meter. If the pump oil yellow and white has emulsified, the gas can be fully open the town, adjust the atmosphere to purify the operation, if necessary, the amount of gas into the pump port operation, can speed up the purification process. If other volatile gases or liquids are pumped, please change the oil in time and wash the oil tank if necessary. Some pumps, in the interstital airway will be deposited pump fluid, in order to obtain a good oil change effect, to find ways to drain the pump fluid. The ultimate pressure is measured using a seat compression mercury vacuum gauge. Measured values ​​increase with a full pressure gauge such as a calibrated thermocouple gauge. Note the regulation of the thermocouple gauge to be paired. It is advisable to back up a calibration that is calibrated at the same time for comparison against any suspected contamination regulation. Increasing the ultimate pressure will decrease the pumping efficiency during high vacuum and will also raise the ultimate total pressure. Can refer to the above description to determine, check, deal with the decline in pumping efficiency and the ultimate pressure rise of the failure. (7) noise. Pump structure design, the motor and pump bearing noise, rotating pieces and other moving parts are smooth, too much oil into the fan, the noise generated by the transmission, a large intake, open air town operation, the oil pan and other pumps Loose parts, inequitable installation caused by vibration, will affect the pump noise. (8) fuel injection. To prevent the injection of fuel tank back to the oil hole size, location, sealing conditions, oil retaining plate design, installation, exhaust part of the mist reducer, oil cap, gas separator, the level of oil into the oil The amount of the size, will affect the pump fuel injection, pump open air pumping, direct pump exhaust air flow rate can be as high as 30m / s, blowing the oil surface, the pump circulating oil and air out of the oil Will test the measures to prevent fuel injection. Zhejiang vacuum pump plant related articles Read: Rotary vane vacuum pump fault diagnosis and solutions (A) of the nine classification of vacuum pumps Expert Weapon: How to maintain the vacuum pump Roots vacuum pump has eight major characteristics of the vacuum pump industry standards (a) the vacuum pump industry standards Second, the cause of the corrosion of the vacuum pump and the solution Vacuum pump selection Vacuum equipment maintenance and repair Copyright: Rotary vane vacuum pump failure diagnosis and solution (b) of the article must be linked to indicate the author and the original source of Zhejiang Vacuum pump plant.
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