Dynamic regulation method of axial force in multistage centrifugal pump with balance drum to balance axial force
An axial force, centrifugal pump technology, applied to the components of the pumping device for elastic fluids, radial flow pumps, pumps, etc., can solve the problem of high failure rate of multi-stage centrifugal pumps and damage to multi-stage centrifugal pumps , high failure rate, to prevent unplanned downtime, prolong service life, and improve efficiency
Inactive Publication Date: 2006-08-02
陆雄
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Problems solved by technology
This often causes the actual axial force value of the entire multistage pump to exceed the range of axial force variation specified in the design, resulting in damage to the multistage centrifugal pump, which is also the reason why the failure rate of multistage centrifugal pumps in engineering practice is much higher than that of single-stage centrifugal pumps. The most fundamental and main reason for the much higher rate
The fact is that in the prior art, multi-stage centrifugal pumps have a much higher failure rate due to excessive axial force than single-stage centrifugal pumps
Method used
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Embodiment 2
[0041] Regulation device embodiment 2: see Figure 4 , the throttle mechanism 3-1 is a throttle valve or an electric throttle valve. The rest of the structure is the same as the previous example.
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The present invention relates to method of regulating the axial force of multi-stage centrifugal pump, and is especially method of regulating multi-stage centrifugal pump with balance drum to balance axial force dynamically and in varying axial force. When some axial force increment from the wear of sealing intervals appears in running multi-stage pump, the flow rate of the throttle mechanism in the regulating device is regulated, so that the pressure difference between the outlet and the inlet reaches some preset value, the difference of average pressures inside two specific cavities in the multi-stage pump is controlled in some other preset value and the increment in axial force is counteracted timely and properly to prolong the MTBF and the average life of the pump. The present invention has simple structure and reasonable design, and is suitable for various kinds of multi-stage centrifugal pump, volute one and guide vane one, horizontal one and vertical one.
Description
Technical field: [0001] The present invention mainly relates to a method for regulating the axial force of a multistage centrifugal pump, in particular to a multistage centrifugal pump in which all impellers are installed in the same direction and used a balance drum to balance the axial force. When the axial force changes during operation, the multistage centrifugal pump method of regulation. Background technique: [0002] Axial force is one of the main factors affecting the average life of centrifugal pumps. In the prior art, for a single-stage single-suction centrifugal pump, the method of balancing the axial force is to set a sealing ring (called the rear sealing ring) on the impeller rear cover plate and connect the pump cavity within the range of the sealing ring to the suction port. Through the connection, the pressure on the front and rear cover plates of the impeller is basically offset, and the residual axial force is borne by the thrust bearing. There are two ...
Claims
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Inventor 陆雄
Owner 陆雄