Changzhou supply centrifugal heat pump heat pump plant

Use and maintenance of the main points of a conducting oil pump, conducting oil pump Caution: (1) After installation, manually rotate the coupling to check for grazing phenomenon. (2) prevent debris into the pump, pump inlet filter set, filter area of ??more than 3 to 4 times the cross-sectional area of ??the pipe. (3) non-air operation. (4) high lift pump should be installed in the discharge line check valve to prevent the sudden shutdown of the water hammer damage. (5) pump procedure: before driving to open the inlet valve, the liquid to be delivered will be filled with the pump; close the outlet valve; Jog electric hoisting machine, check HTF pump rotation is correct; the pump starts, the outlet valve should be opened slowly , until the pump reaches the normal operating state, and then to the desired degree of opening of the outlet valve. Commissioning 5 ~ 10min, without exception, can be put into operation. Parking program: Close the outlet valve; cut off the power; close the inlet, long-term shutdown without cleaning the pump flow path and power off. Second, the maintenance elements and methods: (1) shaft break. Materials WRY conducting oil pump shaft is used in 99% of the cast iron type, shaft broken main reason is because the pump air operation, the bearing and the shaft is broken, dry grinding. Can see the open pump Check the main bearings are worn to prevent a serious way broken pump is to avoid empty running of the pump. (2) bearing damage. Material WRY conducting oil pump bearings used in high density carbon, in case the pump without water or impurities in the pump, it will cause damage to the bearings. Coaxial cylindrical coupling between the inner and outer magnetic rotor can not be guaranteed if requested, will directly affect the bearing life. (3) pump play no liquid. Pump play no liquid pump is the most prone to failure, the reason is greater. First, check the pump suction line leaks place, check the suction pipe in the air whether the discharge amount of liquid in the infusion pump is adequate, whether there is inhalation tube clogged should also check whether the reverse conducting oil pump on (especially in the motor replaced after maintenance or power lines), but also pay attention to the pump suction height is too high. Check if the above does not resolve, you can check the pump apart, to see whether the broken shaft, also check the pump ring, stationary ring is intact, the possibility of a small amount of axial movement of the rotor. If the axial movement difficulties, you can check whether the carbon bearing too closely integrated with the shaft. It is worth noting that pump repair times can not find the problem, it should pay attention to whether the coupling is working properly. Bearings, inner magnetic rotor and the spacer in the operation will produce heat, which will allow higher operating temperatures, on the one hand passing power down, on the other hand on the pump easily vaporized liquid will have great trouble. Magnet power transfer with increasing temperature curve is a continuous decline, usually, in the following working temperature limit of the magnet, which is reversible transfer capacity decline, but at a temperature above the limit is not reversible, i.e., cooled magnet After the loss of transmission capacity can no longer be recovered. Under special circumstances in the magnetic coupling slip (step-out), the spacer eddy heat will sharply increase, a sharp rise in temperature, if not in time, oil pump coupling failure. Therefore conducting oil pump should design reliable cooling system. Of non-evaporable medium, cooling circulation system generally leads impeller or pump flow, the magnetic bearings and transmission parts back to smoking population, easy to vaporization of the media, it should increase the heat exchanger or pump flow diverted to the outside the tank, to avoid the heat back to smoking population, to have solid impurities or iron magnetic impurities media, you should consider filtration media for high temperature, cooling should be considered to ensure that magnetic coupling does not exceed the working temperature limit. When considering the speed is enough to first check whether the normal speed of the motor itself, the available tachometer to measure the motor speed under normal circumstances, consider whether there will be a magnetic coupling slip. (4) lack of lift. The reasons for this failure are: there are within the transmission medium air impeller damage, speed is not enough, the proportion of transmission fluid is too large, the amount of traffic. (5) insufficient flow. Mainly caused by lack of flow are: impeller damage, speed is not enough, head high, tube blockage with debris