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Hydraulic loss testing platform and testing method of canned motor rotor system

A technology for shielding motors and hydraulic loss, applied in the mechanical field, can solve the problems of total power loss of motors, limited quantitative relations, inconvenience, etc., and achieve the effect of solving shielding loss

Active Publication Date: 2012-04-11
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current measurement method is basically to obtain the total power loss of the motor, which is inconvenient for further analysis of the size of each loss, and limits the in-depth analysis of the quantitative relationship between the factors affecting each loss

Method used

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  • Hydraulic loss testing platform and testing method of canned motor rotor system
  • Hydraulic loss testing platform and testing method of canned motor rotor system
  • Hydraulic loss testing platform and testing method of canned motor rotor system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Such as figure 1 As shown, this embodiment provides a shielded motor rotor system hydraulic loss test platform, including a frequency conversion motor 1, a coupling 2, a shielded motor 3, a static pressure tube 4, a Pitot tube flowmeter 5, a first pressure sensor 6, Motor tray 7, electromagnetic flowmeter 8, second pressure sensor 9, circulation pipeline 10, support frame 11 and sealing ring 12; described variable frequency motor 1 and shielded motor 3 are connected by coupling 2, described shielded motor 3 and A sealing ring 12 is provided between the couplings 2, a second pressure sensor 9 is provided in the middle of the shielded motor 3, a static pressure tube 4 and a first pressure sensor 6 are provided below the shielded motor 3, and the shielded motor 3 Supported by a support frame 11, the motor tray 7 is arranged on the support frame 11. The Pitot tube flowmeter 5 and the electromagnetic flowmeter 8 are located under the shielded motor 3 and communicate with the...

Embodiment 2

[0051] This embodiment provides a method for testing hydraulic loss of a rotor system of a shielded motor. The shielded motor involved in this embodiment has a flywheel and an auxiliary impeller structure. During the rotation process, the hydraulic loss of the shielded motor is divided into two parts: the rotor pressure flow power loss and the rotor shear flow power loss. However, these two power losses are often mixed with other losses such as water lubricated bearing power loss and motor shielding loss, and are expressed in the form of total power loss of the shielded motor. The proportion of pressure flow power loss and shear flow power loss in the total loss can only be obtained by calculation, and there is a lack of experimental data.

[0052] The test method of this embodiment comprises the following steps:

[0053] The first step is to start the variable frequency motor 1, and the variable frequency motor 1 drives the shielded motor 3 through the coupling 2, and the ro...

Embodiment 3

[0059] This embodiment provides a method for power separation of the shielded motor 3 in Embodiment 2:

[0060] (1) Collect the working parameters of the variable frequency motor 1, and calculate the power of the shielded motor 3 through the voltage, current, power factor of the variable frequency motor 1 and the efficiency of the variable frequency motor 1. The calculation formula is as follows:

[0061]

[0062] in: Simplify the total power loss of shielded motor 3 for the input, Indicates the voltage input to the variable frequency motor, Indicates the current input to the variable frequency motor, Indicates the power factor of the variable frequency motor, Indicates the efficiency of the variable frequency motor.

[0063] (2) Collect the reading difference of pressure sensors 6 and 9 , to obtain the local high pressure generated by the auxiliary impeller 15;

[0064] is the indication of the first pressure sensor 6 and the second pressure sensor 9 and ...

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Abstract

The invention discloses a hydraulic loss testing platform and testing method of a canned motor rotor system. The platform comprises a variable frequency motor, a coupling, a canned motor, a static tube, a flow meter, a pressure sensor, a motor pallet, a circulation pipeline, a supporting bracket and a seal ring. According to the invention, a canned motor is dragged and simplified by an external variable frequency motor, thereby eliminating the canning loss of the canned motor; the pressure difference generated by an auxiliary impeller is obtained by the pressure sensor, and the flow through the middle part of the auxiliary impeller is obtained by the flow meter, thereby separating quickly the power loss of the pressure flow of the canned motor; a replaceable auxiliary impeller is mounted at the middle part of the canned motor pump rotor, so at to regulate the amount of the pressure flow; and the clearance between the rotor and the stator of the canned motor pump is changed by replacing a sleeve of the stator, and the impact of different clearances on the power loss of the pressure flow and the shear flow of the canned pump can be studied. By using the hydraulic loss testing platform and testing method provided by the invention, the hydraulic loss of the canned motor can be obtained, which provides reference for the structural parameter optimization of the canned motor.

Description

technical field [0001] The invention belongs to the technical field of machinery, and in particular relates to a hydraulic loss test platform and a test method of a shielded motor rotor system. [0002] Background technique [0003] The function of the nuclear main pump is to drive the high-temperature and high-pressure water in the nuclear island to circulate in the primary circuit, transfer the heat energy of the nuclear fission of the reactor core to the steam generator to generate steam, and drive the steam turbine to generate electricity. Since the water in the primary circuit is radioactive, it is required that the nuclear main pump has no leakage. [0004] There are two main options for nuclear main pumps: shaft-sealed pumps and canned pumps. Although the efficiency of the shaft-sealed pump is higher than that of the shielded pump, it has the defect that dynamic sealing is more difficult in high-temperature and high-pressure environments. In view of the difficulty ...

Claims

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Application Information

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IPC IPC(8): F04D15/00
Inventor 姚振强薛亚波成德龚春鸣徐正松沈洪李梦启李藏雪吕向平
Owner SHANGHAI JIAO TONG UNIV
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