Motor fixing test system

Abstract

The invention relates to a motor fixing and testing system which comprises a base, a clamping mechanism is connected to the base and used for clamping a shell of a tested motor, a resistance applying motor is further fixedly connected to the base, and a motor shaft of the resistance applying motor is connected with a motor shaft of the tested motor. The rotation direction of the resistance applying motor is set to be opposite to the rotation direction of the tested motor so as to simulate the rotation condition of the tested motor under mud resistance, the tested motor is connected with a control unit, and the control unit is used for controlling the tested motor and collecting current and voltage signals in the testing process of the tested motor. The system can be used for testing the permanent magnet synchronous motor of the continuous wave signal generator, and has the advantage of being simple and convenient to fix, so that the test can be smoothly carried out; according to the system, the problem that heat of the tested motor is gradually accumulated in the loading test process is solved, and thermal damage to the tested motor is reduced.

Description

Technical Field

[0001] This invention belongs to the field of testing technology for permanent magnet synchronous motors, and specifically relates to a motor fixed testing system. Background Technology

[0002] Logging while drilling (LOD) is a technology that transmits measurement data from downhole instruments to the surface during oil drilling. LOD is of great significance for safe and efficient drilling.

[0003] With the increasing demand for logging data transmission, the data transmission speed has become a crucial issue for measurement-while-drilling (MSWD) systems. Mud pulse transmission methods are categorized into negative pulse, positive pulse, and continuous wave signal transmission based on the type of mud pulse. Negative and positive pulse transmissions are baseband transmissions, characterized by low transmission rates, poor reliability, and susceptibility to interference and bit errors. Continuous wave signal transmission, on the other hand, is a bandwidth transmission. Compared to negative and positive pulse transmissions, continuous wave signal transmission offers significantly faster transmission rates, along with high reliability and strong anti-interference capabilities. Therefore, continuous wave signal transmission holds promising application prospects.

[0004] Continuous wave signal transmission relies on a continuous wave signal generator. Therefore, the development of a continuous wave signal generator is of great significance for promoting the development of measurement while drilling technology, improving drilling success rate, and achieving safe and efficient drilling. It is a very promising measurement while drilling data transmission technology.

[0005] A continuous wave signal generator uses a permanent magnet synchronous motor to control the rotor of a rotary valve, altering the flow area of ​​the drilling fluid to generate continuous drilling fluid pressure waves. These pressure waves are then used for downhole data transmission. Therefore, before deploying the continuous wave signal generator downhole, the control performance of the permanent magnet synchronous motor must be tested to ensure accurate pressure wave signal generation and transmission of downhole measurement data to the surface system.

[0006] Existing testing methods for permanent magnet synchronous motors have the following drawbacks: Most existing testing techniques rely on manual methods, requiring the preparation of power supplies, electronic loads, communication boards, control boards, oscilloscopes, various test cables, computers, and different types of disassembly and assembly tools; setting up the test environment before testing is time-consuming and complex, significantly reducing testing efficiency; during testing, the permanent magnet synchronous motor rotor generates heat after loading, which can easily damage the motor coils without proper cooling. Summary of the Invention

[0007] To address all or some of the aforementioned problems, the present invention aims to provide a motor fixing test system. This motor fixing test system has the advantages of simple and convenient fixing, and also has good versatility.

[0008] According to one aspect of the present invention, a motor fixing test system is provided, including a base, a clamping mechanism connected to the base for clamping the housing of a motor under test, a resistance applying motor fixedly connected to the base, the motor shaft of the resistance applying motor being connected to the motor shaft of the motor under test, the rotation direction of the resistance applying motor being set to be opposite to the rotation direction of the motor under test to simulate the rotation of the motor under test under mud resistance, and a control unit connected to the motor under test for controlling the motor under test and acquiring current and voltage signals of the motor under test during the test process.

[0009] Furthermore, the clamping mechanism includes a lower V-shaped block and an upper V-shaped block. The two sides of the upper V-shaped block are respectively connected to the corresponding sides of the lower V-shaped block by connecting screws. The housing of the motor under test is clamped in the annular space formed by the lower V-shaped block and the upper V-shaped block. The lower V-shaped block is fixedly connected to the base.

[0010] Furthermore, a first fixing ring and a second fixing ring are fixedly connected to the base. The first fixing ring is threadedly connected to the housing of the motor under test, and the second fixing ring is threadedly connected to the housing of the resistance-applying motor.

[0011] Furthermore, the motor shaft of the resistance-applying motor is connected to one end of a coupling via a key, and the other end of the coupling is connected to a connecting shaft via a key, the connecting shaft being fixedly connected to the motor shaft of the motor under test. Furthermore, a spring is provided between the connecting shaft and the motor under test. The two ends of the spring are respectively limited by the connecting shaft and the motor under test. The spring is configured to be in a compressed state to reduce the connection error between the resistance applying motor and the motor under test.

[0012] Furthermore, the tested motor is externally fitted with a heat dissipation system, which is used to cool the tested motor.

[0013] Furthermore, the heat dissipation system includes a first cooling box and a second cooling box. One side of the first cooling box and one side of the second cooling box are hinged together, and the other side of the first cooling box and the other side of the second cooling box are connected by a latch. After the other side of the first cooling box and the other side of the second cooling box are connected together by the latch, they form an annular structure surrounding the outside of the motor under test. Both the first cooling box and the second cooling box are configured to have an inner cavity, an inlet pipe and an outlet pipe, so that water can flow into the inner cavity from the inlet pipe and water can flow out of the inner cavity from the outlet pipe.

[0014] Furthermore, it also includes a protective cover, one side of which is hinged to the base, and the other side of which is connected to the base via a latch. The protective cover is located at the connection between the resistance applying motor and the motor under test. The base is set on a test bench, which is mounted on a frame, and the frame is connected to wheels.

[0015] Furthermore, the control unit includes a power control module, a control board, and a power module. The power control module is connected to the power module, and the power module is connected to the control board. The power control module is used to control the on / off state of the power module so that the power module provides a 48V, 90V, or 150V power supply voltage to the control board. The control board is used to control the rotation of the motor under test, monitor the current and voltage of the power module, and monitor the current and voltage of the motor under test.

[0016] Furthermore, the power control module is connected to a conversion module, which is used to convert 220V AC power into 24V DC power to power the power control module. The conversion module is connected to the 220V AC power supply through a switch control module, which is used to control the on / off connection between the conversion module and the 220V AC power supply.

[0017] As can be seen from the above technical solution, the motor fixing test system provided by the present invention has the following beneficial effects: The motor fixing test system of the present invention is used to test the permanent magnet synchronous motor of the continuous wave signal generator. It has the advantages of simple and convenient fixing, which facilitates the smooth conduct of the test. The motor fixing test system of the present invention solves the problem of heat accumulation in the motor under test during the loading test, and reduces the thermal damage to the motor. The arrangement of the lower V-block and upper V-block in this invention can be used to clamp motors of different diameters, thus exhibiting good versatility. Attached Figure Description

[0018] Figure 1This is a schematic diagram of a motor fixing test system according to an embodiment of the present invention; Figure 2 A schematic diagram of a motor mounting test system with a chassis; Figure 3 This is a schematic block diagram of the control unit according to an embodiment of the present invention; The attached figures are labeled as follows: base 1, frame 11, wheel 12, test box 13, clamping mechanism 2, lower V-block 21, upper V-block 22, heat dissipation system 3, first cooling box 31, second cooling box 32, water inlet pipe 311, water outlet pipe 312, protective cover 4, first fixing ring 5, second fixing ring 6, resistance application motor 7, connecting shaft 8, coupling 9, spring 10. Detailed Implementation

[0019] To better understand the purpose, structure, and function of this invention, a motor fixing test system of this invention will be described in further detail below with reference to the accompanying drawings.

[0020] like Figure 1 , Figure 2 As shown, this invention illustrates a motor fixing test system, including a base 1, a clamping mechanism 2 connected to the base 1 for clamping the housing of the motor under test, a resistance applying motor 7 fixedly connected to the base 1, the motor shaft of the resistance applying motor 7 being connected to the motor shaft of the motor under test, the rotation direction of the resistance applying motor 7 being set to be opposite to the rotation direction of the motor under test to simulate the rotation of the motor under test under mud resistance, the motor under test being connected to a control unit for controlling the motor under test and acquiring current and voltage signals during the test process of the motor under test.

[0021] The motor fixing test system of this invention is used to test the permanent magnet synchronous motor of a continuous wave signal generator, that is, the motor under test is the permanent magnet synchronous motor of the continuous wave signal generator. In specific testing, firstly, the motor shaft of the resistance applying motor 7 is connected to the motor shaft of the motor under test. Then, the motor under test is fixed to the base 1 by the clamping mechanism 2. Finally, the resistance applying motor 7 is started to simulate the mud resistance experienced by the motor under test in actual operation through the reverse torque applied by the resistance applying motor 7. The movement of the motor under test is controlled by the control unit, and the current and voltage signals of the motor under test during the test are collected by the control unit, thus facilitating the judgment of the performance of the motor under test under mud resistance based on the current and voltage signals.

[0022] The motor fixing test system of this invention has the advantages of simple and convenient fixing, which facilitates the smooth conduct of the test.

[0023] The clamping mechanism 2 includes a lower V-block 21 and an upper V-block 22. The two sides of the upper V-block 22 are connected to the corresponding sides of the lower V-block 21 by connecting screws. The housing of the motor under test is clamped in the annular space formed by the lower V-block 21 and the upper V-block 22. The lower V-block 21 and the base 1 are fixedly connected.

[0024] In this embodiment, the clamping mechanism 2 includes a lower V-shaped block 21 and an upper V-shaped block 22. Both the lower V-shaped block 21 and the upper V-shaped block 22 are provided with V-shaped grooves. The two V-shaped grooves together form a groove that is similar to a rhombus shape. This groove is the annular space for clamping the motor under test. The lower V-shaped block 21 is fixed on the base 1. The upper V-shaped block 22 is connected to the two sides of the lower V-shaped block 21 corresponding to the V-shaped groove by two connecting screws.

[0025] During the specific test, first remove the two connecting screws and the upper V-block 22, then place the motor under test on the lower V-block 21, connect the motor shaft of the resistance-applying motor 7 to the motor shaft of the motor under test, and finally connect the lower V-block 21 and the upper V-block 22 using the connecting screws.

[0026] The clamping mechanism 2 in this embodiment enables the motor testing and fixing system to simultaneously adapt to three different outer diameter motors: 475, 675, and 800, thereby eliminating the cumbersome replacement process when testing motors with different outer diameters.

[0027] The base 1 is fixedly connected with a first fixing ring 5 and a second fixing ring 6. The first fixing ring 5 is threadedly connected to the housing of the motor under test, and the second fixing ring 6 is threadedly connected to the housing of the resistance-applying motor 7.

[0028] In this embodiment, the first fixing ring 5 is used to be threadedly connected to the housing of the motor under test, and the second fixing ring 6 is used to be threadedly connected to the housing of the resistance applying motor 7. Both the first fixing ring 5 and the second fixing ring 6 are fixed on the base 1, thereby achieving the fixation of the motor under test and the resistance applying motor 7 in this embodiment.

[0029] Among them, the motor shaft of the resistance-applying motor 7 is connected to one end of the coupling 9 via a connecting key, and the other end of the coupling 9 is connected to the connecting shaft 8 via a connecting key. The connecting shaft 8 is fixedly connected to the motor shaft of the motor under test.

[0030] During installation, insert the connecting key into the motor shaft of the resistance-applying motor 7, then place one end of the coupling 9 onto the motor shaft of the resistance-applying motor 7 after the connecting key has been installed, then insert the connecting key into one end of the connecting shaft 8, then insert the connecting shaft 8 with the connecting key into the other end of the coupling 9, and finally fix the connecting shaft 8 to the motor shaft of the motor under test.

[0031] For the motor testing and fixing system in this embodiment, the base 1 is made of thickened aluminum plate. The coaxiality of the test motor and the resistance applying motor 7 is ensured by precision machining of the base 1, the first fixing ring 5 and the second fixing ring 6. In specific implementation, in order to ensure the coaxiality of the test motor and the resistance applying motor 7, the coaxiality accuracy of the two needs to be ensured within ±0.05mm during the machining process. Furthermore, on the high-precision platform, the lower V-block and the upper V-block can be adjusted to achieve secondary leveling, and then the coupling is used to offset minor deviations to ensure the overall installation coaxiality.

[0032] A spring 10 is provided between the connecting shaft 8 and the motor under test. The two ends of the spring 10 are respectively limited by the connecting shaft 8 and the motor under test. The spring 10 is configured to be in a compressed state to reduce the resistance applied to the connection error between the motor 7 and the motor under test.

[0033] In this embodiment, the spring 10 is configured in a compressed state. Since the motor under test is fixed, the spring 10 has an elastic force on the connecting shaft 8. This elastic force makes the connection between the connecting shaft 8 and the coupling 9, and between the coupling 9 and the resistance-applying motor 7, more reliable.

[0034] Furthermore, since there may be oil leakage in the part of the motor under test near the spring 10, this embodiment also provides a rubber sleeve on the outside of the motor under test, so that the spring 10 presses the rubber sleeve against the corresponding position of the motor under test to reduce or avoid oil leakage.

[0035] The tested motor is equipped with a heat dissipation system 3, which is used to cool the tested motor.

[0036] The heat dissipation system 3 in this embodiment solves the problem of heat accumulation in the tested motor during the loading test, and reduces the thermal damage to the motor.

[0037] The heat dissipation system 3 includes a first cooling box 31 and a second cooling box 32. One side of the first cooling box 31 and one side of the second cooling box 32 are hinged together, and the other side of the first cooling box 31 and the other side of the second cooling box 32 are connected by a latch. The other side of the first cooling box 31 and the other side of the second cooling box 32 are connected together by the latch to form an annular structure surrounding the outside of the motor under test. The first cooling box 31 and the second cooling box 32 are both configured to have an inner cavity, an inlet pipe 311 and an outlet pipe 312, so that water can flow into the inner cavity from the inlet pipe 311 and water can flow out of the inner cavity from the outlet pipe 312.

[0038] Specifically, one side of the first cooling box 31 and one side of the second cooling box 32 are hinged together, and the other side of the first cooling box 31 and the other side of the second cooling box 32 are locked together. After the other side of the first cooling box 31 and the other side of the second cooling box 32 are locked together, they form an annular structure surrounding the outside of the motor under test.

[0039] The inner cavities of the first cooling box 31 and the second cooling box 32 are independent of each other, and the first cooling box 31 and the second cooling box 32 are respectively connected to their inner cavities through their respective inlet pipes 311 and outlet pipes 312. In use, coolant is injected into the corresponding inner cavity through the inlet pipe 311. After entering the inner cavity, the coolant absorbs the heat generated by the motor under test. The cooled coolant is discharged from the outlet pipe 312. By continuously injecting coolant from the inlet pipe 311 and discharging coolant from the outlet pipe 312, heat dissipation of the motor under test is achieved.

[0040] As an alternative, both sides of the first cooling box 31 are locked to both sides of the second cooling box 32.

[0041] The motor fixing test system of this invention also includes a protective cover 4. One side of the protective cover 4 is hinged to the base 1, and the other side of the protective cover 4 is connected to the base 1 through a buckle. The protective cover 4 is set at the connection between the resistance applying motor 7 and the motor under test.

[0042] The protective cover 4 in this embodiment is provided for safety protection to ensure that the motor under test can be tested smoothly.

[0043] The base 1 is set on the test platform, the test platform is mounted on the frame 11, and the frame 11 is connected to the wheels 12.

[0044] Among them, such as Figure 3 As shown, the control unit includes a power control module, a control board, and a power module. The power control module is connected to the power module, and the power module is connected to the control board. The power control module is used to control the on / off state of the power module so that the power module provides a 48V, 90V, or 150V power supply voltage to the control board. The control board is used to control the rotation of the motor under test, monitor the current and voltage of the power module, and monitor the current and voltage of the motor under test.

[0045] Specifically, the control board is connected to the motor under test via an RS485 communication interface to monitor the current and voltage of the motor under test, so as to determine the performance of the motor under test under mud resistance based on the current and voltage values ​​of the motor under test.

[0046] The power module is connected to the control board. The power module provides 48V, 90V or 150V power supply voltage to the control board to meet different testing requirements. The power control module controls the on / off state of the power module so that the power module provides 48V, 90V or 150V power supply voltage to the control board.

[0047] This embodiment also includes a host computer, which is connected to the control board via a USB-to-RS485 or USB-to-TBus bus to send corresponding control commands to the control board and enable the control board to control the motor under test.

[0048] The control unit also includes a display screen, which is connected to the control board via an RS485 communication interface. The display screen receives the current and voltage of the motor under test from the control board. The control board may also monitor the power output status of the power module, and the display screen will show the corresponding power output status of the power module.

[0049] The power control module is connected to a conversion module, which converts 220V AC power into 24V DC power to power the power control module. The conversion module is connected to the 220V AC power supply through a switch control module, which controls the connection and disconnection between the conversion module and the 220V AC power supply.

[0050] In this embodiment, the switch control module is used to control the connection and disconnection between the conversion module and the 220V AC power supply. The switch control module is connected to a main switch. When the main switch is pressed, the switch control module is turned on, and the conversion module is connected to the 220V AC power supply. If the conversion module is connected to the 220V AC power supply, the conversion module is used to convert the received 220V AC power into 24V DC power for use by the power control module.

[0051] The control board also controls the 90V and 150V switches via communication data transmission. Both the 90V and 150V switches are connected to the power control module, which specifically includes a 48V power module, a 90V power module, and a 150V power module. When the control board controls the 90V switch to close, the 90V power module connects to the control board to provide a 90V power supply voltage. When the control board controls the 150V switch to close, the 150V power module connects to the control board to provide a 150V power supply voltage. When the control board controls the 90V and 150V switches to open, the 48V power module connects to the control board to provide a 48V power supply voltage.

[0052] Based on the configuration of the control unit, the test bench and / or frame of the motor fixing test system in this embodiment of the invention are also equipped with corresponding wiring channels. These channels facilitate wiring, making the wiring process simpler and more convenient. The control unit can be housed within a control box as needed. The frame can be configured with multiple layers as required, and wheels can be installed at the bottom of the frame to facilitate its movement. For the resistance-applying motor, it can be, for example, housed within the test box 13.

[0053] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0054] Furthermore, the terms "a," "two," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly defined.

[0055] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A motor fixing test system, characterized in that, The device includes a base, on which a clamping mechanism is connected for clamping the housing of the motor under test. A resistance-applying motor is also fixedly connected to the base, with its motor shaft connected to the motor shaft of the motor under test. The rotation direction of the resistance-applying motor is set to be opposite to that of the motor under test to simulate the rotation of the motor under test under mud resistance. The motor under test is connected to a control unit for controlling the motor under test and acquiring current and voltage signals during the testing process.

2. The motor fixing test system according to claim 1, characterized in that, The clamping mechanism includes a lower V-shaped block and an upper V-shaped block. The two sides of the upper V-shaped block are connected to the corresponding sides of the lower V-shaped block by connecting screws. The housing of the motor under test is clamped in the annular space formed by the lower V-shaped block and the upper V-shaped block. The lower V-shaped block is fixedly connected to the base.

3. The motor fixing test system according to claim 2, characterized in that, A first fixing ring and a second fixing ring are fixedly connected to the base. The first fixing ring is threadedly connected to the housing of the motor under test, and the second fixing ring is threadedly connected to the housing of the resistance-applying motor.

4. The motor fixing test system according to claim 1, characterized in that, The motor shaft of the resistance-applying motor is connected to one end of a coupling via a key, and the other end of the coupling is connected to a connecting shaft via a key. The connecting shaft is fixedly connected to the motor shaft of the motor under test.

5. The motor fixing test system according to claim 4, characterized in that, A spring is provided between the connecting shaft and the motor under test. The two ends of the spring are respectively limited by the connecting shaft and the motor under test. The spring is configured to be in a compressed state to reduce the connection error between the resistance applying motor and the motor under test.

6. The motor fixing test system according to claim 1, characterized in that, The motor under test is equipped with a heat dissipation system, which is used to cool the motor under test.

7. The motor fixing test system according to claim 6, characterized in that, The heat dissipation system includes a first cooling box and a second cooling box. One side of the first cooling box and one side of the second cooling box are hinged together, and the other side of the first cooling box and the other side of the second cooling box are connected by a latch. After the other side of the first cooling box and the other side of the second cooling box are connected together by the latch, they form an annular structure surrounding the outside of the motor under test. Both the first cooling box and the second cooling box are configured to have an inner cavity, an inlet pipe and an outlet pipe, so that water can flow into the inner cavity from the inlet pipe and water can flow out of the inner cavity from the outlet pipe.

8. The motor fixing test system according to any one of claims 1-7, characterized in that, It also includes a protective cover, one side of which is hinged to the base, and the other side of which is connected to the base via a latch. The protective cover is located at the connection between the resistance applying motor and the motor under test. The base is set on a test bench, which is mounted on a frame, and the frame is connected to wheels.

9. The motor fixing test system according to claim 1, characterized in that, The control unit includes a power control module, a control board, and a power module. The power control module is connected to the power module, and the power module is connected to the control board. The power control module is used to control the on / off state of the power module so that the power module provides a 48V, 90V, or 150V power supply voltage to the control board. The control board is used to control the rotation of the motor under test, monitor the current and voltage of the power module, and monitor the current and voltage of the motor under test.

10. The motor fixing test system according to claim 9, characterized in that, The power control module is connected to a conversion module, which converts 220V AC power into 24V DC power to supply power to the power control module. The conversion module is connected to the 220V AC power supply through a switch control module, which controls the connection and disconnection between the conversion module and the 220V AC power supply.

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