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12

2021-11

Daily Maintenance of Horizontal Double Suction Centrifugal Pump

1. Use tools to scrape off the residual scale and rust on the inner and outer surfaces of the impeller, sealing rings and bearings, etc., and then clean them with water or compressed air and blow them off. 2. Clean the rust and dirt on each joint surface of the double suction pump shell. 3. Clean the water seal pipe and check whether the pipe is unobstructed. 4. Clean the bearing bush and bearing, remove dirt, and then clean the oil ring and oil level gauge and other components. Ball bearings should be cleaned with gasoline. 5. For parts that are not assembled temporarily, protective oil should be applied after cleaning. 6. The matching between the impeller and the shaft shall be H/h. When installing the impeller, the key and the keyway shall be in close contact. For the shaft diameter of the rotor part, the allowable bending shall be ≤ 0.013mm, for the large bending of the low-speed shaft, it shall be <0.07mm, and for the large bending of the company shaft, it shall be <0.04mm. H/h is used for assembling the shaft sleeve part and the shaft. For the shaft of the rotor part, the circular runout of the shaft diameter is not more than 0.013mm, the shaft sleeve ≤ 0.02mm, the impeller mouth ring ≤ 0.04mm, the impeller end face ≤ 0.23mm, and the shaft diameter at both ends ≤ 0.02mm. For centrifugal pumps with complex structures, the daily maintenance conditions of the horizontal double-suction centrifugal pumps are also inconsistent.

2021-11-12

Daily Maintenance of Horizontal Double Suction Centrifugal Pump

12

2021-11

How to solve the problem of insufficient flow of mine wear-resistant multistage centrifugal pump

How to solve the problem of insufficient flow of mine wear-resistant multistage centrifugal pump, the insufficient flow of mine wear-resistant multistage centrifugal pump is mainly caused by air leakage or blockage, and the insufficient flow caused by the relatively low speed of mine wear-resistant multistage centrifugal pump. We must adhere to all parts of the wear-resistant multistage centrifugal pump for mining, mainly the suction pipe and valve base should not cause air leakage, and at the inlet and outlet pipe ports, it is mainly clear that debris is generally blocked. We can also increase the water inlet depth of the multistage pump, which can effectively solve the water pressure brought to us by the wear-resistant multistage centrifugal pump for mining, and also check whether the voltage is stable, this is a good way to improve the speed of the mine wear-resistant multistage centrifugal pump. There are some sealing ring with a longer performance will decline, we have to timely replacement of the sealing ring and runner. The main problem of overheating of the transmission shaft or motor bearing of the mine wear-resistant multistage centrifugal pump is insufficient lubrication. We can solve this problem by adding lubricating oil appropriately. Mine wear-resistant multistage centrifugal pump can not be normal working medium can not flow out. Perhaps the main reason is that the sealing of the suction pipe is insufficient or even broken. We take the replacement of the absorption tube in the process should also be appropriate to check the bottom valve failure, fundamentally to solve this kind of problem.

2021-11-12

How to solve the problem of insufficient flow of mine wear-resistant multistage centrifugal pump

12

2021-11

How to deal with the noise of horizontal multistage centrifugal pump

How to deal with the noise of horizontal multistage centrifugal pump, the main noise treatment of horizontal multistage centrifugal pump is on the control of vibration reduction equipment. Because the weight of many current pumps is not very large, their own noise is not very large. At present, many pump rooms are controlled by automation, and the penetration rate is getting higher and higher. This makes the management staff less contact or check the pump, and our staff in the pump because the noise is relatively small, will not have a great impact on the human body. Generally, the noise generated by a standard qualified pump will not exceed 85dB. According to the standard of noise in our country, the sound heard by people is normal within 70 to 70, that is to say, it will not affect the human body. However, what kind of noise makes us feel that the noise is very loud, that is, the position where we must place it. Special attention should be paid to the position where it must be placed in spaced rooms or against walls, floors, etc. These media will quickly make the noise spread through them. If we want to fundamentally solve the noise problem of horizontal multistage centrifugal pump, we must improve the radiation conditions. The scheme introduced by Changsha Zhonglian Pump Industry Technical Engineer is to install shock absorbers or shockproof equipment on horizontal multistage centrifugal pump, especially on the support. We should not place it separately to show up or stick to the wall. We should use software support. Or in the installation of the pipeline on the use of soft cushion. This method does not make the multi-stage pump in the construction of the noise inside the house, but this method will be a good improvement for the people outside the house. Moreover, the cost is relatively small, which can effectively build noise outside the house. As long as we use certain noise reduction equipment in the house, we can build a lot. There are also relatively small people flowing in the pump house, and there are few problems with standard pumps. Therefore, it is an effective and good method mentioned just now.

2021-11-12

How to deal with the noise of horizontal multistage centrifugal pump

09

2021-11

Which conditions of horizontal medium-open centrifugal pump need to be shut down for maintenance

Horizontal centrifugal pump failure is inevitable, according to different circumstances, we deal with the problem in different ways, and when the equipment in the process of operation, if the following situations, must stop inspection processing.

2021-11-09

Which conditions of horizontal medium-open centrifugal pump need to be shut down for maintenance

09

2021-11

Use of horizontal multistage clean water pump

Horizontal multistage fresh water pump is a new series of multistage segmented centrifugal pumps improved on the basis of DA type pumps. The stator part of the pump is mainly composed of front section, middle section, rear section, guide wing, tail cover and bearing body, which are connected by screw. The rotor part is mainly composed of several impellers mounted on the shaft (depending on the required head) and a balance disc for balancing the axial force. The entire rotor section is supported at both ends on single-row radial roller bearings lubricated with grease. Pumps with a diameter of more than 200mm adopt babb alloy sliding bearings. The static joint surface between the front, rear and middle sections of the horizontal multistage fresh water pump is sealed with paper cushion. The sealing of the rotating part between the stages of the pump is achieved by the sealing ring in front of the impeller and the small gap between the guide wing sleeve and the front section, the middle section and the guide wing. In order to prevent water from entering the bearing, the O-ring and the water retaining ring are installed. Both ends of the pump's working chamber are sealed with soft packing or mechanical seals to prevent air from entering and a large amount of liquid from leaking out. The stuffing box is composed of water inlet section, tail cover, packing gland, packing ring and packing. A small amount of liquid with a certain pressure acts as a liquid seal through the filling chamber. The direction of rotation of the pump is clockwise as viewed from the direction of the motor. Horizontal multi-stage fresh water pump production, more applications, the use is for the transport of water and physical and chemical properties similar to water liquid. It is suitable for mine drainage, urban and factory water supply. The technical specifications of horizontal multistage fresh water pump are more than one in multistage centrifugal pumps, for example, flow rate: 3. 75 -1100 m3/h, lift: 52. 5~1870m, with power: 5.5 ~ 2300kW.

2021-11-09

Use of horizontal multistage clean water pump
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