Vertical self-priming centrifugal chemical pump installation are those with basic operation method

with the development of economy, self-priming centrifugal chemical pump is more and more widely application in engineering, detail below to help you self-priming centrifugal pump status and its development direction.

self-priming centrifugal chemical pump because of its simple installation, cover an area of an area small, easy to maintain, no noise etc, and widely used in municipal engineering in the engineering, factories, commercial, hospital, hotel, residential sewage discharge. At present China's domestic self-priming centrifugal pump is mainly composed of domestic manufacturers of production and manufacturing, a small number of products imported from abroad. Market prospect is very broad. But as a result of sewage pump reliability needs to be strengthened, so that to improve the technology content of its products is the main development direction of vendor in the future.

the development direction of self-priming centrifugal chemical pump

aiming at the problems of self-priming centrifugal pump, some of the domestic manufacturers to focus on the development of pump protection system: automatic alarm when the sewage pump running occur abnormal or cut off power supply. Although this approach can have certain effect, and the protection is necessary, but this is not the fundamental way to solve the problem, we need to focus on improve the performance of the pump, to fundamentally solve the problem.

in addition, the development of the product to fully consider the environmental problem, make research and development of products are more energy-saving, environmental protection.

the place on put together is narrated, diving sewage pump needs to solve the problem is to improve the reliability of use in the future, can adapt to a variety of work environment, optimize the structure design, to further improve the performance of self-priming centrifugal chemical pump.

vertical centrifugal chemical pump vibration and vibration reduction transformation basic method

large vertical centrifugal pumps in the process of operation, a large, up and down bearing vibration often fever, damaged, or even pump shaft and the bearing connection parts wear and tear. operation is not stable, affect the normal water supply, need to be vibration control.

the transformation situation, pumps

for all these reasons, we adopted the following two steps.

1, strengthen rigidity pipeline. Considering of the pump as it is difficult to reinforce adopted in the pump export steel pipe welding 'reinforcement' way. Along the direction of in and out of the water, the water pump outlet divergent tube and the water valve flange on both ends of the connection between the steel tube, with eight is 32 mm, width is 100 mm thickness steel plate welding. Increase the stiffness of the steel tube, reduce the deformation and resistance to water pump displacement. Measured, after reinforcement, the pump displacement of point A drop to zero. 35mm。

2, to modify the transmission system. To reduce the vibration of the motor, transmission shaft to the water pump, changing the rigid connection between the pump and the shaft to elastic connection. Use the GB4323 - 84 column elastic sleeve pin couplings, centrifugal pump maximum compensation displacement is zero. 6 mm, Angle of compensation for 1 ° 30? 。 In this way, motor, the vibration of the shaft can be obtained by elastic coupling compensation, not directly to the pump.

2, chemical pump vibration cause analysis

1, the domestic 28 sla - vertical pumps 10 is composed of horizontal pump direct transformation. Motor base and the pump base between vertical height is 4. 3 m, drive line weighing in at 3 t. Relative to the horizontal pump, it increased the root length is 3752 mm diameter is 140 mm in the middle of the shaft. On the structure, in addition to adding a bearing on the shaft in the middle, without any modification. The four pumps running stress is zero for a long time. 7 ~ 0. 85MPa。 Under high head and large flow conditions, such a high center of gravity, the quality of the large system of high-speed rotation, the centrifugal force is very big, will cause the vibration of large unit. Combined with stent and the water pump in and out of the water direction connection stiffness is insufficient, lead to the pump and the fittings have larger displacement. Runtime pumps on the displacement cause of the bearing force change, vibration increase, so easy to fever. If the correct pump displacement, improve bearing force condition, can reduce the system's vibration intensity.

2, chemical industry for the rigid connection between pump and the shaft. Due to manufacture, installation, operation when the pump shaft and the shaft concentric, cause water pump vibration; Motor, drive shaft and other source of vibration is passed directly to the pump, the form of vibration superposition, further strengthen the water pump vibration. In addition, such a rigid connection increase water pump bearing on the external force, the bearing is easy fever, affect the pump shaft.

3, the transformation results

after modification, measured, chemical pump vibration by the vibrating velocity of 4 before modification. 3 reduced to 1 cm/s. 48cm/s。 According to the vibration intensity standard ISO2372 - 1974 can determine the pump running in a good area. Smooth operation, at the same time, water pump, bearing on the normal maintenance, also did not have the pump shaft is wear phenomenon, explain the transformation was a success.

large vertical centrifugal pumps in the process of operation, a large, up and down bearing vibration often fever, damaged, or even pump shaft and the bearing connection parts wear and tear. operation is not stable, affect the normal water supply, need to be vibration control.

a, chemical pump vibration cause analysis

1, the domestic 28 sla - vertical pumps 10 is composed of horizontal pump direct transformation. Motor base and the pump base between vertical height is 4. 3 m, drive line weighing in at 3 t. Relative to the horizontal pump, it increased the root length is 3752 mm diameter is 140 mm in the middle of the shaft. On the structure, in addition to adding a bearing on the shaft in the middle, without any modification. The four pumps running stress is zero for a long time. 7 ~ 0. 85MPa。 Under high head and large flow conditions, such a high center of gravity, the quality of the large system of high-speed rotation, the centrifugal force is very big, will cause the vibration of large unit.
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