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Experimental device of 'wet' rotor effect of multi-stage centrifugal pump

A rotor effect and experimental device technology, applied in pumps, pump control, non-variable pumps, etc., can solve the problems of insufficient theoretical and experimental research support, dependence on large ultra-high pressure centrifugal pump units, etc., and improve independent design and production The effect of the ability

Inactive Publication Date: 2010-10-20
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This situation makes the domestic multistage centrifugal pump industry still in a state of imitation and relying on experience in the design and production, without sufficient theoretical and experimental research support, resulting in the situation that my country's large ultra-high pressure centrifugal pump units basically rely on foreign imported products

Method used

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  • Experimental device of 'wet' rotor effect of multi-stage centrifugal pump
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  • Experimental device of 'wet' rotor effect of multi-stage centrifugal pump

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Embodiment 1

[0020] Embodiment 1, figure 1 and figure 2 Combined with an experimental device for the "wet" rotor effect of a multi-stage centrifugal pump, it includes a pulley speed change device 4 and a drive motor 3 arranged on the base 2 of the test bench, as well as a motor frequency conversion control cabinet 1 and a signal acquisition and processing system. 8. A multi-stage wet rotor table 9 and a pressure cycle system for simulating the working state of the seal between stages of a real multi-stage pump.

[0021] The multi-stage wet rotor table 9 includes a pressure-bearing shell with 5 stages of rotor segments inside. Each rotor segment is composed of a high-pressure chamber 25 and a low-pressure chamber 24, and each low-pressure chamber 24 is respectively provided with a pump rotor 26; Since a high-pressure chamber 25 is arranged between every two low-pressure chambers 24, five low-pressure chambers 24 and four high-pressure chambers 25 are arranged in the pressure-bearing housi...

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Abstract

The invention discloses an experimental device of 'wet' rotor effect of a multi-stage centrifugal pump, which comprises a multi-stage wet rotor platform (9) and the like, wherein the multi-stage wet rotor platform (9) comprises a pressure-bearing shell which is internally provided with at least two stages of rotor sections, and a rotating shaft (18) passing through the pressure-bearing shell; each stage of rotor section consists of a high pressure bin (25) and a lower pressure bin (24) provided with a pump rotor (26); inter-stage seal (28) is arranged between the high pressure bin (25) and the lower pressure bin (24); the shaft neck part at the root of the pump rotor (26) is provided with a speed displacement sensor (22); a pressure circulating system is respectively communicated with the high pressure bin (25) and the lower pressure bin (24); a driving motor (3) is connected with a rotating shaft (18) by a belt pulley speed changing device (4); and a torque rotating speed measurement instrument (6) is positioned between the belt pulley speed changing device (4) and the rotating shaft (18). The experimental device can be used for measuring the amplitude and the torque of a multi-stage wet rotor along with the change of the rotating speed under the different working pressures and inter-stage seal structures.

Description

technical field [0001] The invention is an experimental device for studying the "wet" rotor effect of a multistage centrifugal pump, which is used to study the mechanism of the "wet" rotor effect of the multistage centrifugal pump rotor system and the "wet" rotor effect in various working states and different interstage sealing structures. Wet" rotor effect. Background technique [0002] Multi-stage centrifugal pumps are widely used in important industries such as petroleum, chemical industry, electric power and steel, and become important auxiliary equipment for production equipment. With the development of large-scale high-speed, its rotor dynamics design is very important. In the rotor dynamics design of multistage centrifugal pumps, there are problems in the analysis and design of "dry" and "wet" critical speeds. The "dry" critical speed only considers the critical speed of the pump rotor supported by the bearings at both ends, but in the working state of the pump, due...

Claims

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Application Information

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IPC IPC(8): F04D1/06F04D15/00
Inventor 王乐勤平仕良吴大转焦磊戴维平张志雄
Owner ZHEJIANG UNIV
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