1, we must first understand the ZYB heavy oil coal tar pump type, characteristics, the current situation. Understand the requirements, determine the repair target. Before testing, prepare for testing. 2, to determine the pump of heavy oil coal tar fault diagnosis. Judgment, may save trouble. Confirmed to verify. 3, troubleshooting, first Jane after the complex, the first easy hard. Do not disassemble without demolition. To reduce the lack of special tools and improper operation caused by new damage, reduce the position changes and run-in time. In general, the splicing rotor is not removable, otherwise the form of tolerance can not be guaranteed, the rotor scrapped. 4, high pressure residue pump poisonous, corrosive pump, users should be invited to clean, and inform the necessary protective measures to protect the health of maintenance staff. 5, classification of the proposed fault is divided into operational failure and performance problems. Operation failure can include pump does not turn, pump temperature is too high, oil spills, oil spills, such as the maximum power exceeded. Performance failure can include the ultimate pressure, extreme pressure, suction efficiency, noise, fuel injection, gas town performance, etc. can not meet the requirements or not. 6, fault diagnosis and diagnostic examples (1) pump does not turn. Unidentified can not open the pump, so as not to aggravate the fault. Can be used to move hands and can not move. ①pump can move without turning. The reason can be coupling failure; belt slippage; motor wiring is wrong; motor damage; no power and so on. ② can not panic or plate up very heavy, the reason can be because the starting pump temperature is too low, the pump oil viscosity is too high; design and manufacture of pump stop too much oil. Too much oil caused by the pump back to the oil too much (too much fuel, KCB-300 or oil vapor condensation in the pump, or condensation in the exhaust pipe back to the oil pump); foreign body in the pump ( (2) The pump (2) The pump (2) The pump (2) The pump Temperature is too high.Refers to the lowest measured near the exhaust valve exceeds the maximum oil temperature specified in the instructions.Because the pump temperature will make the pump oil viscosity dropped significantly and make the saturated vapor pressure of the pump oil so that the pump limit Pressure increase and suction efficiency decline; so that the rubber parts easy to aging; thermal expansion to reduce the running gap, in particular, the thickness of certain non-metallic rotary vane and copper sleeve hole clearance, affecting the reliability of pump operation. Pump temperature is too high The reasons may be the pump ambient temperature is too high, the intake air temperature is too high, the intake cooling device fails, the pump long-term continuous operation of the inlet pressure is too high; oil-cooled pump cooling oil is insufficient, poor circulation design effect of oil; Valve failure, etc. (3) Oil leakage can occur in the shaft seal, Box and pump parts of the sealing surface, drain plug, oil standard, oil hole bulkhead, stator parts and bearing through-hole connections Department, gas ballast valve (such as 2X-8) and other parts. Gear pump kcb55 by the seal Aging, improper installation, damage failure, uneven surface, impurities, rough and loose castings, etc. If you stop the pump back to the oil, the oil will enter the gas town valve, the gas valve may not leak gas leak. , Be sure to use oil-resistant rubber, according to the original design shape, the sealing surface is too large when the pressure is not tight will leak. (4) oil leakage can occur in the tubing joints, oil cover boring cover plane, Valves and other places, the oil drill wear, casting defects, cracking, may also lead to oil leakage. (5) high power over .Can be long-term continuous for the inlet pressure is too high, the exhaust pressure is too high, Pump temperature is too high, rotary vane, etc. with the gap is too small, the voltage is too high, too much pump fluid back into the pump, etc., will cause damage to the motor should try to avoid long-term continuous operation near the maximum power.If there is sediment on the surface, To regularly open the cleanup. (6) The ultimate pressure is not Can be caused by external leakage, internal leakage, oil hole blockage, poor quality or pollution of pump oil deterioration, oil and gas and other condensable substances, instrument distortion, pump operation is not normal, etc. When the leakage is more, the exhaust port can be See the white steam. There are more bubbles at the oil mark, the hand can feel the exhaust pressure on the exhaust port. The low-level exhaust valve has more bubbles in the oil surface. The power will increase .At this time, you should first check the gas town The valve is closed.As a result of the new pump factory outlet in each test the ultimate pressure, so if the leakage phenomenon, the pump port and piping, valves, containers one by one inspection. Outside the shaft seal failure, oil cup oil, oil Bore head leakage can also cause leakage. High pressure residue pump leakage by the pump movement gap, exhaust valve seat plane, the exhaust valve sealing surface, the shaft seal, pump cover plane, intake pipe, gas valve seal Parts, etc. Wear, corrosion, bite will make the running gap increase.Oil blocking, open the fuel filler hole to listen, the pump noise will be lighter, in the case of a good seal, if the hand on the exhaust port has been sucked The feeling that the exhaust valve may fail. If the pump oil is clean, long-term storage unused, can open the town valve to purify the pump oil vapor. 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 oil silver 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 reduce the pumping efficiency during high vacuum and the KC B gear pump 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 size, 2CY gear pump will affect the pump fuel injection, the pump open air pumping, direct pump exhaust air flow rate can be as high as 30m / s, blowing the oil surface, the cycle of heavy oil coal tar pump Oil and air out of the oil will test the prevention of fuel injection measures
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