Assembly state detection device for shield pump system

Abstract

An assembly state detection device for a shield pump system comprises an axial lifting assembly, an upper radial electromagnetic bearing, an upper radial displacement detection assembly, a lower radial electromagnetic bearing and a lower radial displacement detection assembly, and the upper radial electromagnetic bearing and the lower radial electromagnetic bearing are installed at the upper end and the lower end of a motor shell correspondingly. An upper radial displacement detection assembly is mounted on the upper radial electromagnetic bearing; a lower radial displacement detection assembly is mounted on the lower radial electromagnetic bearing; the axial lifting assembly is located on the upper portion of the upper radial electromagnetic bearing. In a closed shielding motor system, the electromagnetic bearing is matched with the sensor, so that the installation state is measured without damaging the sealing state under the condition of no disassembly. By electrifying the axial stator to lift the rotating shaft and cooperating with radial displacement difference detection, bending or mounting eccentricity of the rotating shaft is accurately diagnosed. The invention relates to the technical field of motor assembly detection.

Description

TECHNICAL FIELD

[0001] The application relates to a motor assembly detection technology field, in particular to a shielding pump system assembly state detection device, which is especially suitable for a shielding motor system containing an electromagnetic bearing and a completely closed rotating shaft. BACKGROUND

[0002] The shielding motor containing the electromagnetic bearing has unique advantages in the industry. The machining size and installation state of each component including the stator and rotor of the system are crucial to the operation of the whole system. On the one hand, the machining of the components is limited by the maximum precision of the equipment, and the cumulative error of the many parts of the whole system may cause abnormal system state. In addition, the machining process and steps of the motor parts during machining are imperfect, which causes errors in the component cooperation. The measurement method of the traditional detection device makes it difficult to guarantee the measurement accuracy and accuracy, and the above factors affect the assembly state of the whole system. On the other hand, for some special environments, the internal and external environments are completely separated, and the rotating shaft is completely closed inside without protruding parts at both ends. The assembly state of the rotating shaft after installation cannot be measured by the traditional method. SUMMARY

[0003] The application provides a shielding pump system assembly state detection device to accurately diagnose the bending or installation eccentricity of the rotating shaft without disassembling the components and damaging the sealing state through axial pulling and radial displacement difference detection.

[0004] The technical scheme adopted by the application to solve the above problems is as follows: The shielding pump system assembly state detection device provided by the application comprises: an upper radial electromagnetic bearing assembly located at the upper end of the motor shell; a lower radial electromagnetic bearing assembly located at the lower end of the motor shell, an axial pulling assembly located at the upper part of the upper radial electromagnetic bearing assembly and used for providing axial pulling force to the rotating shaft; an upper radial displacement detection assembly connected with the upper radial electromagnetic bearing assembly and used for measuring the radial position of the upper radial rotor in the upper radial electromagnetic bearing assembly; a lower radial displacement detection assembly connected with the lower radial electromagnetic bearing assembly and used for converting the radial position signal of the upper radial rotor into an electric signal.

[0005] Further, the axial pulling assembly comprises an upper sealing top cover, an axial sensor, an upper axial stator, an axial rotor and a lower axial stator, the axial rotor is fixedly installed with the rotating shaft, the upper axial stator and the lower axial stator are respectively located at the upper and lower ends of the axial rotor, the upper axial stator is connected with the upper sealing top cover, and the axial sensor vertically penetrates through the top cover and is connected with the axial rotor.

[0006] Further, the upper radial electromagnetic bearing assembly comprises an upper flange, an upper radial rotor, an upper radial stator and an upper connecting cover, the upper radial rotor is fixedly connected with the rotating shaft, the upper radial stator is sleeved on the upper radial rotor and is assembled with the upper flange, the upper flange is fixed with the upper connecting cover, and the upper radial displacement detection assembly is connected with the upper flange.

[0007] Further, the upper radial displacement detection assembly comprises two upper radial sensors which are horizontally passed through the upper flange and are butted against the side wall of the upper radial rotor.

[0008] Further, the included angle between the axes of the two upper radial sensors is 90°.

[0009] Further, the lower radial electromagnetic bearing assembly comprises a lower connecting cover, a lower radial rotor, a lower radial stator, a lower flange and a lower sealing top cover, the lower radial rotor is fixedly installed with the rotating shaft, the lower radial stator is sleeved on the lower radial rotor and is fastened with the lower connecting cover and the lower sealing top cover through the lower flange, and the lower radial displacement detection assembly is connected with the lower flange.

[0010] Further, the lower radial displacement detection assembly comprises two lower radial sensors which are horizontally passed through the lower flange and are butted against the side wall of the lower radial rotor.

[0011] Further, the included angle between the axes of the two lower radial sensors is 90°.

[0012] The beneficial effects of the present application are: 1. The device is simple and rigorous in design: through the cooperation between the components, the measurement of the deviation can be realized with fewer components; the components work cooperatively to realize the visual measurement of the installation state of the components; 2. The application scenarios are wide: the present application can be installed in a matched mode, the installation state of the system can be measured without disassembling the system components, and the system can be ensured to be in a good state capable of playing a function. Through the reasonable design of the sealing structure, the installation state of the system can be detected in a closed state; the present application can be applied to occasions with special requirements for the internal environment of the components; 3. Good adjustability: the sensors are independently installed, corresponding precision level sensors can be used according to the measurement accuracy requirements; and the electromagnetic force components in different directions are independent of each other, and the size of the electromagnetic force provided by the components can be adjusted according to the mass of the measured components. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the present application; Figure 2 is a schematic diagram of the upper assembly structure of the present application; Figure 3 is a schematic diagram of the lower assembly structure of the present application; Figure 4It is the schematic diagram of the installation sequence of each part of the application.

[0014] In the figure: 1 - upper sealing top cover; 2 - axial sensor; 3 - upper axial stator; 4 - axial rotor; 5 - lower axial stator; 6 - upper flange; 7 - upper radial sensor; 8 - upper radial rotor; 9 - upper radial stator; 10 - upper connecting cover; 11 - lower connecting cover; 12 - lower radial rotor; 13 - lower radial sensor; 14 - lower radial stator; 15 - lower flange; 16 - lower sealing top cover; 17 - fastening screw; 18 - motor shell; 19 - fine screw. DETAILED DESCRIPTION

[0015] Specific implementation one: combined Figures 1 to 3 In this embodiment, the device for detecting the assembly state of a shield pump system comprises: The upper sealing top cover 1 is used for installing the axial sensor and isolating the motor from the external environment, The axial sensor 2 vertically penetrates the top cover 1 and contacts the axial rotor 4, and is used for measuring the axial position of the thrust disc; The upper axial stator 3 is internally provided with a coil, and provides upward axial electromagnetic force; The axial rotor 4 cooperates with the axial stator to generate axial force, so as to control the axial position of the shaft; The lower axial stator 5 is internally provided with a coil, and provides downward axial electromagnetic force; The upper flange 6 provides installation space for the upper radial stator 9 and the two upper radial sensors 7; The two upper radial sensors 7 are installed in the installation holes of the upper flange 6, and the two upper radial sensors 7 are 90° aligned with the radial upper radial rotor 8, and are used for measuring the radial position of the upper radial rotor 8; The upper radial rotor 8 cooperates with the upper radial stator to generate radial electromagnetic force; The upper radial stator 9 is internally provided with a radial coil, and cooperates with the upper radial rotor to generate radial electromagnetic force; The upper connecting cover 10 is the installation space of the upper radial electromagnetic bearing, and isolates the upper measurement part from the external environment.

[0016] The lower connecting cover 11 is the lower radial installation space, and isolates the internal and external environments; The lower radial rotor 12 cooperates with the lower radial stator 14 to generate radial force; The two lower radial sensors 13 are installed in the installation holes of the lower flange 15, and the two lower radial sensors 13 are 90° aligned with the radial lower radial rotor 12, and convert the radial position signal of the upper radial rotor 8 into an electric signal; The lower radial stator 14 is internally provided with a radial coil, and cooperates with the lower radial rotor 12 to generate radial electromagnetic force; Lower flange 15, providing installation space for lower radial stator 14 and lower radial sensor 13; Lower sealing top cover 16, isolating the motor from the external environment; Fine screw rod 19, used to connect the components of the upper and lower assemblies; Fastening screw rod 17, used to connect the upper and lower connecting covers 10 and 11.

[0017] As shown in Figure 4 , the components are assembled in the following order: Upper assembly assembly: first, install the upper and lower connecting covers 10 and 11 on the two ends of the motor housing 18, and fasten them with the fastening screw rod 17; install the upper and lower radial rotors 8 and 12 on the shaft; install the upper radial stator 9 on the upper connecting cover 10 and fasten it; install the lower axial stator 5 on the upper flange 6; then install the axial rotor 4 on the shaft and fasten it to the shaft with a fastening nut to prevent axial movement; install the upper flange 6 with the lower axial stator on the upper connecting cover 10, then install the axial rotor 4 on the shaft, install the upper axial stator 3 to the upper sealing top cover 1, and then assemble the upper top cover 1 with the upper axial stator and fasten the upper assembly with fine fastening screw rod 19; the upper assembly is installed.

[0018] Lower assembly assembly: connect the lower flange 15 and the lower connecting cover 11 with a straight mouth, assemble the electromagnetic bearing lower radial stator 14 and the lower sealing top cover 16, and fasten them; assemble the lower sealing top cover 16 with the electromagnetic bearing lower radial stator and the lower flange, and fasten them with a fastening bolt; the lower assembly is installed.

[0019] Sensor installation: install the upper axial sensor 2 vertically in the corresponding installation hole of the upper sealing top cover 1, install the upper radial sensor 7 in the corresponding installation hole of the upper flange 6, and install the lower radial sensor 13 in the corresponding installation hole of the lower flange 15.

[0020] Fasten the upper and lower assemblies to the two ends of the motor housing 18 with fastening screw rod 17.

[0021] The shielding pump system assembly state detection device according to the embodiment has the following measurement steps: 1. Pull the shaft: Pass current through the upper axial stator 3 to generate an upward electromagnetic force to lift the shaft, and the axial sensor 2 monitors the suspension height; 2. Data acquisition: Record the readings of the upper radial sensor 7 at this time as U1 and U2; record the readings of the lower radial sensor 13 as U3 and U4.

[0022] 3. Diagnosis and analysis: Whether the sensor parameters on the same phase are consistent; for example, U1 and U2 are the sensor readings on the same phase, and U3 and U4 are the sensor readings on the same phase, that is, the installation position is accurate, and there should be U1=U3 U2=U4 If the sensor readings are not equal, that is, U1≠U3 U2≠U4 It is indicated that the sensor installation flange is eccentric or the rotating shaft is bent, and at this time, the part should be avoided to be put into operation to avoid scratching and damaging the part.

[0023] The above is only the preferred embodiment of the present application, and is not intended to limit the present application in any form. Although the present application has been disclosed as above with the preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution range of the present application, and the equivalent embodiments with equivalent changes are equivalent. Any simple modification, equivalent replacement and improvement of the above embodiments, as long as it does not depart from the technical solution content of the present application, is within the scope of protection of the present application.

Claims

1. A shielded pump system assembly status detection device, comprising: Comprise: Upper radial electromagnetic bearing assembly, located at the upper end of the motor housing (18); Lower radial electromagnetic bearing assembly, located at the lower end of the motor housing (18), Axial lifting assembly, located at the upper part of the upper radial electromagnetic bearing assembly, for providing axial lifting force to the rotating shaft; Upper radial displacement detection assembly, connected with the upper radial electromagnetic bearing assembly, for measuring the radial position of the upper radial rotor (8) in the upper radial electromagnetic bearing assembly; Lower radial displacement detection assembly, connected with the lower radial electromagnetic bearing assembly; for converting the radial position signal of the upper radial rotor (8) into an electrical signal.

2. A device for detecting the assembly state of a canned pump system according to claim 1, characterized in that The axial lifting assembly comprises an upper sealing top cover (1), an axial sensor (2), an upper axial stator (3), an axial rotor (4) and a lower axial stator (5), the axial rotor (4) is fixedly installed with the rotating shaft, the upper axial stator (3) and the lower axial stator (5) are respectively located at the upper and lower ends of the axial rotor (4), the upper axial stator (3) is connected with the upper sealing top cover (1), and the axial sensor (2) vertically penetrates through the upper sealing top cover (1) and is connected with the axial rotor (4).

3. A device for detecting the assembly state of a canned pump system according to claim 1, characterized in that The upper radial electromagnetic bearing assembly comprises an upper flange (6), an upper radial rotor (8), an upper radial stator (9) and an upper connecting cover (10), the upper radial rotor (8) is fixedly connected with the rotating shaft, the upper radial stator (9) is sleeved on the upper radial rotor (8) and assembled with the upper flange (6), the upper flange (6) is fixed with the upper connecting cover (10), and the upper radial displacement detection assembly is connected with the upper flange (6).

4. A device for detecting the assembly state of a canned pump system according to claim 3, characterized in that The upper radial displacement detection assembly comprises two upper radial sensors (7), and the two upper radial sensors (7) horizontally penetrate through the upper flange (6) and are connected with the side wall of the upper radial rotor (8).

5. A shielded pump system assembly status detection device according to claim 4, wherein, The included angle between the axes of the two upper radial sensors (7) is 90°.

6. A device for detecting the assembly state of a canned pump system according to claim 1, characterized in that The lower radial electromagnetic bearing assembly comprises a lower connecting cover (11), a lower radial rotor (12), a lower radial stator (14), a lower flange (15) and a lower sealing top cover (16), the lower radial rotor (12) is fixedly installed with the rotating shaft, the lower radial stator (14) is sleeved on the lower radial rotor (12), and is fastened with the lower connecting cover (11) and the lower sealing top cover (16) through the lower flange (15), and the lower radial displacement detection assembly is connected with the lower flange (15).

7. A shielded pump system assembly status detection device according to claim 6, wherein, The lower radial displacement detection assembly comprises two lower radial sensors (13), and the two lower radial sensors (13) horizontally penetrate through the lower flange (15) and are connected with the side wall of the lower radial rotor (12).

8. A shielded pump system assembly status detection device according to claim 7, wherein, The included angle between the axes of the two lower radial sensors (13) is 90°.

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