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
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Example Embodiment
[0042] Example 1
[0043] Such as figure 1 As shown, this embodiment provides a hydraulic loss test platform for a shielded motor rotor system, which includes a variable frequency motor 1, a coupling 2, a shielded motor 3, a static pressure tube 4, a Pitot flowmeter 5, a first pressure sensor 6, The motor tray 7, the electromagnetic flowmeter 8, the second pressure sensor 9, the circulating pipeline 10, the support frame 11 and the sealing ring 12; the variable frequency motor 1 and the shielding motor 3 are connected by a coupling 2, and the shielding motor 3 is connected to A sealing ring 12 is arranged between the couplings 2, a second pressure sensor 9 is arranged in the middle of the shielding motor 3, a static pressure tube 4 and a first pressure sensor 6 are arranged under the shielding motor 3, the shielding motor 3 It is supported by a support frame 11 on which a motor tray 7 is provided. The pitot flowmeter 5 and the electromagnetic flowmeter 8 are located under the shi...
Example Embodiment
[0050] Example 2
[0051] This embodiment provides a method for testing the hydraulic loss of a shielded motor rotor system. The shielded motor involved in this embodiment has a flywheel and auxiliary impeller structure. During the rotation process, the hydraulic loss of the shielded motor is divided into the rotor pressure flow power loss and the rotor shear flow power loss. However, these two kinds of power loss are often mixed with other losses such as water-lubricated bearing power loss and motor shielding loss, and manifested in the form of the 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 test data is lacking.
[0052] The test method of this embodiment includes the following steps:
[0053] In the first step, the variable frequency motor 1 is started. The variable frequency motor 1 drives the shield motor 3 through the coupling 2, and the rotor system of ...
Example Embodiment
[0058] Example 3
[0059] This embodiment provides a method for power separation of the shielded motor 3 of Embodiment 2:
[0060] (1) Collect the working parameters of the variable frequency motor 1. The power of the shielded motor 3 is calculated by the voltage, current, power factor of the variable frequency motor 1 and the efficiency of the variable frequency motor 1.
[0061]
[0062] among them: Simplify the total power loss of shielded motor 3 for input, Represents the input voltage of the variable frequency motor, Indicates the current input to the variable frequency motor, Represents the power factor of the variable frequency motor, Indicates the efficiency of the variable frequency motor.
[0063] (2) Collect the indication difference of pressure sensor 6, 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 with Poor, namely:
[0065] ;
[0066] (3) Coll...
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