A test platform and method for low-speed and high-speed submersible motor protector

Abstract

The present invention relates to a test platform and method for a submersible motor protector suitable for low speed and high speed, and belongs to the technical field of submersible motor protector testing. The technical scheme is: the motor (12) and the reducer (13) are both arranged in the protector test platform base (11), the lower end of the motor protector (18) is fixed to the upper end surface of the protector test platform base through the lower end connecting flange (16), and the pressurizing device (20) is arranged on the upper end of the motor protector through the upper end connecting flange (19); the output end of the motor (12) is sequentially connected to the motor protector (18) through the reducer (13), the coupling (14), and the torque sensor (15), and the torque sensor is matched and connected with the electric control system (5). The present invention can apply torque and load to the motor protector at the same time to simulate the actual working condition. At the same time, the motor protector is equipped with a magnetic temperature sensor, which can judge the performance of the motor protector by temperature and perform a comprehensive test.

Description

Technical Field

[0001] The invention relates to a test platform and method for a low-speed and high-speed submersible motor protector, belonging to the technical field of submersible motor protector testing. Background Art

[0002] Submersible screw pump oil production is a newly developed mechanical oil production process system in recent decades. As one of the key components of the submersible screw pump, the performance and reliability of the protector assembly directly affect and determine the safety and reliability of the entire submersible screw pump oil production system. In addition to meeting the requirements of sealing and corrosion resistance, the submersible motor protector assembly must also ensure long life, impact resistance, fatigue resistance and other performance requirements. During the operation of the protector, the main shaft rotates with the motor and is subjected to axial stress; the leakage of motor lubricating oil during operation is inevitable; the protector capsule is eroded by temperature, natural gas containing corrosive gases and well fluid during the "breathing" process, and its service life will be shortened. Therefore, it is necessary to conduct simulation tests on the protector to verify the rationality of the design and the precision of the installation. The vertical well series test is generally used in domestic testing of submersible motor protectors. This method requires a test well with sufficient depth, and the motor, protector and screw pump need to be connected and lowered into the well in sequence to test the unit synchronously. This method is cumbersome to operate and complex in process, and there are many factors affecting the results. There are some existing protector test benches in China that can test the protector individually, but the test error is large and has certain limitations. There is no platform or method that can place the motor for loading torque and the pressurizing device for loading pressure on the same side to conduct a protector durability test. Summary of the invention

[0003] The purpose of the present invention is to provide a test platform and method for a submersible motor protector suitable for low-speed and high-speed submersible motors, in which a motor loaded with torque and a pressurizing device loaded with pressure are placed on the same side for a protector durability test, and the motor protector can be tested simultaneously at high and low speeds, with pressure applied at the top and torque applied at the bottom, thereby performing a comprehensive load durability test with small test error and high precision, thereby solving the problems existing in the background technology.

[0004] The technical solution of the present invention is:

[0005] A protector test platform for a submersible motor suitable for low speed and high speed, comprising a protector test bench test frame, a high speed protector test platform, a low speed protector test platform and an electric control system; the high speed protector test platform, the low speed protector test platform and the electric control system are all arranged on the protector test bench test frame;

[0006] The low-speed protector test platform comprises a protector test platform base, a motor, a reducer, a coupling, a torque sensor, a lower end connecting flange, a motor protector, an upper end connecting flange and a pressurizing device; the protector test platform base is a vertical frame structure, fixed on the protector test bench test frame, the motor and the reducer are both arranged in the protector test platform base, the lower end of the motor protector is fixed to the upper end surface of the protector test platform base through the lower end connecting flange, and the pressurizing device is arranged on the upper end of the motor protector through the upper end connecting flange; the motor output end is sequentially connected to the motor protector through the reducer, the coupling, and the torque sensor, and the torque sensor is matched and connected with the electronic control system;

[0007] Compared with the low-speed protector test platform, the motor output end of the high-speed protector test platform is directly connected to the motor protector through a coupling and a torque sensor, the rotation speed of the motor protector in the high-speed protector test platform is faster than that in the low-speed protector test platform, the pressure value of the pressurizing device in the high-speed protector test platform is smaller than the pressure value of the pressurizing device in the low-speed protector test platform, and the rest of the structure is the same as the low-speed protector test platform.

[0008] The pressurizing device includes a spline sleeve, a top shaft, a bearing group, a pressure sensor, a cylinder and a lifting ring. The output shaft of the motor protector is connected to the top shaft through the spline sleeve, the top shaft is connected to the lever of the cylinder through the bearing group and the pressure sensor, the pressure sensor is matched with the electronic control system, and a lifting ring is provided on the top of the cylinder for easy lifting.

[0009] The motor protector is provided with a magnetic temperature sensor, which is matched and connected with the electric control system.

[0010] The protector test bench test frame is a double-layer high and low platform structure consisting of an upper platform and a lower platform. The protector test platform base of the high-speed protector test platform and the protector test platform base of the low-speed protector test platform are respectively arranged on the lower platform, and the motor protector of the high-speed protector test platform and the motor protector of the low-speed protector test platform are respectively arranged on the upper platform through corresponding protector fixing clamping devices.

[0011] The upper platform is provided with a longitudinally arranged slideway, the protector fixing clamping device is slidably arranged on the slideway up and down, and the fixing clamping device can fix the motor protector without shaking.

[0012] The upper platform and the lower platform are connected by stairs, which is convenient for personnel operation.

[0013] The electric control system is arranged on the side of the test frame of the protector test bench for easy viewing.

[0014] A fence is provided at the edge of the upper platform to prevent people from falling.

[0015] The motor protector is vertically arranged between the motor and the pressure device.

[0016] A test method for a low-speed and high-speed submersible motor protector is provided, using the above test platform, and the steps are as follows:

[0017] The motor protector durability test can be carried out under high speed and low pressure conditions and / or low speed and high pressure conditions;

[0018] A. Durability test under low speed and high pressure:

[0019] Start the motor, the motor output shaft is decelerated by the reducer and runs at a low speed. The motor provides a large torque and transmits the torque to the protector shaft through the coupling and torque sensor. The torque sensor can record the torque value and display it on the touch screen of the electronic control system.

[0020] Start the pressurizing device, the cylinder provides a high downward axial pressure, and transmits the pressure to the bearing group through the pressure sensor. At the same time, the pressure sensor can record the pressure value and transmit it to the touch screen. The bearing group transmits the pressure to the top shaft. The bearing group can not only transmit the pressure, but also reduce the deflection of the top shaft, thereby reducing friction; the top shaft transmits the pressure to the shaft of the motor protector. At this time, the motor protector undergoes a durability test under the conditions of both high torque and high pressure;

[0021] B. Durability test at high speed and low pressure:

[0022] Start the motor, the motor output shaft runs at a high speed, the motor provides a small torque and transmits the torque to the protector shaft through the coupling and the torque sensor, and the torque sensor can record the torque value and display it on the touch screen of the electronic control system;

[0023] Start the pressurizing device, the cylinder provides a lower downward axial pressure, and transmits the pressure to the bearing group through the pressure sensor. At the same time, the pressure sensor can record the pressure value and transmit it to the touch screen. The bearing group transmits the pressure to the top shaft. The bearing group can both transmit pressure and reduce the deflection of the top shaft, thereby reducing friction; the top shaft transmits the pressure to the shaft of the motor protector. At this time, the motor protector is subjected to a durability test under the conditions of both small torque and low pressure.

[0024] The magnetic temperature sensor is adsorbed on the surface of the protector shell to record the internal temperature of the motor protector. The magnetic temperature sensor transmits the internal temperature data of the motor protector to the electronic control system. The wear condition inside the motor protector can be judged by observing the temperature value on the touch screen of the electronic control system.

[0025] The high-speed protector test platform has different required rated torque and load size from the low-speed protector test platform. Except for the different selection of motor and pressure device, the other structures are basically the same as the low-speed protector test platform.

[0026] The beneficial effects of the present invention are as follows: different speeds of the motor provide large or small torques for the bottom of the motor protector, and at the same time the pressurizing device provides a larger or smaller load for the top of the motor protector. The motor for loading torque and the pressurizing device for loading pressure are located on the same side, simulating actual working conditions, and can record the magnitude of torque and load through torque sensors and pressure sensors; the motor protector is equipped with a magnetic temperature sensor, which can judge the performance of the motor protector by temperature, and conduct comprehensive tests, and the test data obtained are accurate with small errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the structure of the low-speed protector test platform of the present invention;

[0029] Figure 3 It is a cross-sectional view of the pressurizing device of the present invention;

[0030] In the figure: protector test bench test frame 1, upper platform 101, lower platform 102, stairs 103, fence 104, high-speed protector test platform 2, low-speed protector test platform 3, protector fixing clamping device 4, electronic control system 5, low-speed protector test platform base 11, motor 12, reducer 13, coupling 14, torque sensor 15, lower end connecting flange 16, magnetic temperature sensor 17, motor protector 18, upper end connecting flange 19, pressurizing device 20, spline sleeve 21, top shaft 22, bearing group 23, pressure sensor 24, cylinder 25, lifting ring 26, slideway 27. DETAILED DESCRIPTION

[0031] The present invention will be further described below by way of embodiments with reference to the accompanying drawings.

[0032] A submersible motor protector test platform suitable for low-speed and high-speed includes a protector test bench test frame 1, a high-speed protector test platform 2, a low-speed protector test platform 3, a protector fixing and clamping device 4, and an electric control system 5; the protector test bench test frame 1 is a double-layer high-low platform structure consisting of an upper platform 101 and a lower platform 102, the lower platform 102 is set on the ground, the upper platform 101 and the lower platform 102 are connected by stairs 103, the upper platform 101 is provided with a longitudinally arranged slideway 104, the protector fixing and clamping device 4 is slidably arranged on the slideway 104, and a fence 104 is provided at the edge of the upper platform 101 to prevent people from falling. The electric control system 5 is arranged on the side of the upper platform 101 to facilitate people to view data.

[0033] The low-speed protector test platform 3 comprises a protector test platform base 11, a motor 12, a reducer 13, a coupling 14, a torque sensor 15, a lower end connecting flange 16, a motor protector 18, an upper end connecting flange 19 and a pressurizing device 20; the protector test platform base 11 is a vertical frame structure, fixed on the lower platform 102, the motor 12 and the reducer 13 are both arranged in the protector test platform base 11, the lower end of the motor protector 18 is vertically fixed to the upper end surface of the protector test platform base 11 through the lower end connecting flange 16, and the pressurizing device 20 0 is vertically arranged at the upper end of the motor protector 18 through the upper end connecting flange 19, and the middle part of the motor protector 18 is clamped in the protector fixing clamping device 4, and the protector fixing clamping device 4 prevents the motor protector 18 from shaking; the output end of the motor 12 is sequentially connected to the motor protector 18 through the reducer 13, the coupling 14, and the torque sensor 15, and the torque sensor 15 is matched and connected with the electric control system 5; the motor protector 18 is provided with a magnetic temperature sensor 17, and the magnetic temperature sensor 17 is matched and connected with the electric control system 5 to transmit the internal temperature of the motor protector 18.

[0034] The pressurizing device includes a spline sleeve 21, a top shaft 22, a bearing group 23, a pressure sensor 24, a cylinder 25 and a lifting ring 26. The output shaft of the motor protector 18 is connected to the top shaft 22 through the spline sleeve 21. The top shaft 22 is connected to the lever of the cylinder 25 through the bearing group 23 and the pressure sensor 24. The pressure sensor 24 is matched with the electronic control system 5. A lifting ring 26 is provided on the top of the cylinder 25 for easy lifting.

[0035] Compared with the low-speed protector test platform 3, the high-speed protector test platform 2 has the following characteristics: the output end of the motor 12 is directly connected to the motor protector 18 through the coupling 14 and the torque sensor 15; the rotation speed of the motor protector 18 in the high-speed protector test platform is faster than that in the low-speed protector test platform 3; the pressure value of the pressurizing device in the high-speed protector test platform 2 is smaller than the pressure value of the pressurizing device in the low-speed protector test platform 3; and the rest of the structure is the same as that of the low-speed protector test platform 3.

[0036] The high-speed protector test platform has different required rated torque and load size from the low-speed protector test platform. Except for the different selection of motor and pressure device, the other structures are basically the same as the low-speed protector test platform.

[0037] The installation process of the present invention:

[0038] When installing the low-speed protector test platform 3, first install the low-speed protector test platform base 11 on the lower platform 102, and install the motor 12 and the reducer 13 on the low-speed protector test platform base 11. Then connect the motor protector 18 to the upper end surface of the low-speed protector test platform base 11 through the lower end connecting flange 16, and at the same time, connect the lower end of the motor protector 18 to the torque sensor 15, the coupling 14, the reducer 13 and the motor 12 in sequence. Finally, use the overhead crane hook to hook it on the lifting ring 26, and lift the pressure device as a whole to the top of the motor protector. The lower part of the pressure device is connected to the upper end of the motor protector through the upper end connecting flange 19. One end of the spline sleeve 21 of the pressure device is connected to the shaft of the motor protector, and the other end is connected to the top shaft 22. The top shaft 22 can both bear torque and transmit pressure. The installation method of the high-speed protector test platform is similar to that of the low-speed protector test platform.

[0039] A test method for a low-speed and high-speed submersible motor protector is provided, using the above test platform, and the steps are as follows:

[0040] The motor protector durability test can be carried out under high speed and low pressure conditions and / or low speed and high pressure conditions;

[0041] A. Durability test under low speed and high pressure:

[0042] Start the motor 12, the output shaft of the motor 12 is decelerated by the reducer 13, and runs at a low speed. The motor 12 provides a large torque and transmits the torque to the shaft of the protector through the coupling 14 and the torque sensor 15, and the torque sensor 15 can record the torque value and display it on the touch screen of the electronic control system;

[0043] Start the pressurizing device 20, the cylinder 25 provides a relatively high downward axial pressure, and transmits the pressure to the bearing group 23 through the pressure sensor 24. At the same time, the pressure sensor can record the pressure value and transmit it to the touch screen. The bearing group 23 transmits the pressure to the top shaft 22. The bearing group 23 can not only transmit the pressure, but also reduce the deflection of the top shaft 22, thereby reducing friction; the top shaft 22 transmits the pressure to the shaft of the motor protector. At this time, the motor protector is subjected to a durability test under the conditions of both high torque and high pressure;

[0044] B. Durability test at high speed and low pressure:

[0045] The motor 12 is started, and the output shaft of the motor 12 runs at a high speed. The motor 12 provides a small torque and transmits the torque to the shaft of the protector through the coupling 14 and the torque sensor 15. The torque sensor 15 can record the torque value and display it on the touch screen of the electronic control system;

[0046] Start the pressurizing device 20, the cylinder 25 provides a lower downward axial pressure, and transmits the pressure to the bearing group 23 through the pressure sensor 24. At the same time, the pressure sensor can record the pressure value and transmit it to the touch screen. The bearing group 23 transmits the pressure to the top shaft 22. The bearing group 23 can both transmit pressure and reduce the deflection of the top shaft 22, thereby reducing friction; the top shaft 22 transmits the pressure to the shaft of the motor protector. At this time, the motor protector is subjected to a durability test under the conditions of both small torque and low pressure.

[0047] In order to facilitate the measurement of the internal temperature of the motor protector, the magnetic temperature sensor 17 is adsorbed on the surface of the protector shell to record the internal temperature of the motor protector as realistically as possible. The magnetic temperature sensor 17 transmits the internal temperature data of the motor protector to the electronic control system 5, and the wear condition of the protector is judged by observing the temperature value on the touch screen of the electronic control system 5.

Claims

1. A test platform for low-speed and high-speed submersible motor protectors, characterized in that: It comprises a protector test bench test frame (1), a high-speed protector test platform (2), a low-speed protector test platform (3) and an electric control system (5); the high-speed protector test platform (2), the low-speed protector test platform (3) and the electric control system (5) are all arranged on the protector test bench test frame (1); The low-speed protector test platform (3) comprises a protector test platform base (11), a motor (12), a reducer (13), a coupling (14), a torque sensor (15), a lower end connecting flange (16), a motor protector (18), an upper end connecting flange (19) and a pressure device (20); the protector test platform base (11) is a vertical frame structure, fixed on a protector test bench test frame (1); the motor (12) and the reducer (13) are both arranged in the protector test platform base (11); the lower end of the motor protector (18) is fixed to the upper end surface of the protector test platform base (11) through the lower end connecting flange (16); the pressure device (20) is arranged on the upper end of the motor protector (18) through the upper end connecting flange (19); the output end of the motor (12) is sequentially connected to the motor protector (18) through the reducer (13), the coupling (14) and the torque sensor (15); the torque sensor (15) is matched and connected to the electric control system (5); Compared with the low-speed protector test platform (3), the high-speed protector test platform (2) has an output end of a motor (12) directly connected to a motor protector (18) via a coupling (14) and a torque sensor (15); the rotation speed of the motor protector (18) in the high-speed protector test platform is faster than that of the motor protector (18) in the low-speed protector test platform (3); the pressure value of the pressurizing device in the high-speed protector test platform (2) is smaller than the pressure value of the pressurizing device in the low-speed protector test platform (3); and the remaining structures are the same as those of the low-speed protector test platform (3); The pressurizing device comprises a spline sleeve (21), a top shaft (22), a bearing group (23), a pressure sensor (24), a cylinder (25) and a lifting ring (26); the output shaft of the motor protector (18) is connected to the top shaft (22) through the spline sleeve (21); the top shaft (22) is connected to the lever of the cylinder (25) through the bearing group (23) and the pressure sensor (24); the pressure sensor (24) is connected to the electronic control system (5); and a lifting ring (26) is provided on the top of the cylinder (25); The motor protector (18) is provided with a magnetic temperature sensor (17), and the magnetic temperature sensor (17) is matched and connected to the electric control system (5); The protector test bench test frame (1) is a double-layer high-low platform structure consisting of an upper platform (101) and a lower platform (102); the protector test platform base of the high-speed protector test platform (2) and the protector test platform base of the low-speed protector test platform (3) are respectively arranged on the lower platform (102); the motor protector of the high-speed protector test platform (2) and the motor protector of the low-speed protector test platform (3) are respectively arranged on the upper platform via corresponding protector fixing clamping devices (4).

2. A low-speed and high-speed submersible motor protector test platform according to claim 1, characterized in that: The upper platform is provided with a longitudinally arranged slideway (27), and the protector fixing clamping device (4) is slidably arranged up and down on the slideway (27).

3. A submersible motor protector test platform suitable for low speed and high speed according to claim 1 or 2, characterized in that: The upper platform (101) and the lower platform (102) are connected via stairs (103).

4. A test platform for low-speed and high-speed submersible motor protectors according to claim 1 or 2, characterized in that: A fence (104) is provided at the edge of the upper platform.

5. A test method for a low-speed and high-speed submersible motor protector, using the test platform described in any one of claims 1 to 4, characterized in that: The motor protector durability test can be carried out under high speed and low pressure conditions and / or low speed and high pressure conditions; A. Durability test under low speed and high pressure: The motor (12) is started, and the output shaft of the motor (12) is decelerated by the reducer (13) to run at a low speed. The motor (12) provides a large torque and transmits the torque to the shaft of the protector through the coupling (14) and the torque sensor (15), and the torque sensor (15) can record the torque value and display it on the touch screen of the electronic control system; The pressurizing device (20) is started, the cylinder (25) provides a relatively high downward axial pressure, and transmits the pressure to the bearing group (23) through the pressure sensor (24). At the same time, the pressure sensor can record the pressure value and transmit it to the touch screen. The bearing group (23) transmits the pressure to the top shaft (22), and the top shaft (22) transmits the pressure to the shaft of the motor protector. At this time, the motor protector is subjected to a durability test under the condition of being subjected to both a large torque and a high pressure. B. Durability test at high speed and low pressure: The motor (12) is started, and the output shaft of the motor (12) runs at a high speed. The motor (12) provides a small torque and transmits the torque to the shaft of the protector through the coupling (14) and the torque sensor (15), and the torque sensor (15) can record the torque value and display it on the touch screen of the electronic control system; The pressurizing device (20) is started, the cylinder (25) provides a low downward axial pressure, and transmits the pressure to the bearing group (23) through the pressure sensor (24). At the same time, the pressure sensor can record the pressure value and transmit it to the touch screen. The bearing group (23) transmits the pressure to the top shaft (22), and the top shaft (22) transmits the pressure to the shaft of the motor protector. At this time, the motor protector is subjected to a durability test under the conditions of both low torque and low pressure.

6. A test method for a low-speed and high-speed submersible motor protector according to claim 5, characterized in that: The magnetic temperature sensor (17) is adsorbed on the surface of the protector housing to record the internal temperature of the motor protector. The magnetic temperature sensor (17) transmits the internal temperature data of the motor protector to the electric control system (5). The wear condition of the motor protector is judged by observing the temperature value on the touch screen of the electric control system (5).

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