Adjusting tool and adjusting method for horizontal torquemeter transmission shaft system of high-rotating-speed centrifugal pump test bed

Abstract

The invention relates to the field of high-rotating-speed centrifugal pump installation and adjustment, and provides an adjusting tool and an adjusting method for a horizontal torquemeter transmission shaft system of a high-rotating-speed centrifugal pump test bed in order to solve the problems that an existing adjusting tool and an adjusting method for the transmission shaft system cannot meet the requirement for accurate measurement of long-distance multi-stage transmission of a small-diameter shaft system and the like. Comprising a rotating assembly, a vernier assembly, a dial indicator assembly, an angle dial and a distance measuring sensor. The rotating assembly comprises a positioning shell and a rotating shaft; a distance measuring mounting seat is arranged on the outer circumference of the rotating shaft measuring end, a gauge stand mounting groove is axially formed in the end face of the distance measuring mounting seat, and a vernier stand mounting hole is radially formed in the rotating shaft close to the rotating shaft measuring end; the vernier assembly is used for measuring and adjusting the coaxiality and the end face parallelism between the motor output end coupler, the torque meter input end coupler and the pump frame positioning end face. The dial indicator assembly is used for measuring and adjusting the coaxiality and the end face parallelism between the torque meter output end coupler and the pump frame positioning end face.

Description

Technical Field

[0001] The invention relates to the field of installation and adjustment of a high-speed centrifugal pump test bench, and in particular to an adjustment tool and an adjustment method for a transmission shaft system of a horizontal torque meter of a high-speed centrifugal pump test bench. Background Art

[0002] In the existing high-speed centrifugal pump hydraulic test, the pump test speed usually reaches more than 20,000 r / min, so the installation and adjustment accuracy of the entire transmission shaft system of the test bench is relatively high; on the test bench with high-speed end torque measurement requirements, flexible diaphragm couplings are usually used to transmit torque. This torque transmission method can not only enhance the flexibility of the transmission machinery, but also compensate for the axial, angular and end face displacement deviations of the connecting shaft to a certain extent, and can improve the vibration characteristics of the transmission components, playing a role in buffering and vibration isolation.

[0003] The structural principle of the transmission shaft system of the horizontal torque meter on the test bench is as follows: Figure 1 As shown, the coaxiality and end face parallelism deviations of the entire axis system composed of the output shaft of the high-speed motor 33, the torque meter 32 and the positioning end face of the pump frame 1 need to be controlled within ±0.05mm, and the axial distance deviation from the motor output end coupling 11 to the pump frame positioning end face needs to be controlled within ±0.05mm; the test pump is installed on the pump frame 1, and is connected to the input shaft and output shaft of the torque meter 32 and the output shaft of the motor 33 through a diaphragm coupling (torque meter input end coupling 12, torque meter output end coupling 13, motor output end coupling 11), and the motor 33 runs at high speed to output high speed to drive the pump to rotate for testing, and performs synchronous torque measurement. The existing transmission shaft adjustment method usually adopts the following two ways: one is to fix the dial indicator stand on the motor transmission shaft or the diaphragm coupling, and install the dial indicator through the dial indicator stand adapter to measure the circumferential surface and end face of the docking shaft or coupling respectively; by rotating the transmission shaft, measure the values ​​of the four points of 0, 90, 180, and 270° respectively, calculate the deviation of the parallelism of the two coupling axis center lines and end faces, and then adjust the deviation to the qualified accuracy range.

[0004] Another method is to use a laser alignment instrument. The laser transmitter and receiver are fixed on the motor shaft and the docking shaft respectively, and the two shafts are rotated 360° synchronously to complete the measurement through laser emission and reception. The instrument calculates the deviation.

[0005] The above two methods are suitable for large-scale water pump units and high-power low-speed transmission shaft systems, which require the transmission shaft to have good rigidity, not easy to be elastically deformed by force, and the shaft diameter is sufficient to install instrument tools. However, the diaphragm coupling used in the high-speed centrifugal pump test bench is small in size and weak in rigidity. It will be elastically deformed when slightly stressed, and it is easy to damage the shaft positioning end face after assembly and disassembly. It is not easy to disassemble and cannot install measuring tools and instruments on it; therefore, the motor output shaft and torque meter shaft cannot be used as components to provide rotation measurement, but can only be used as the measured end, and the centering installation reference pump frame of the high-speed centrifugal pump test bench cannot provide circumferential rotation based on the axis to complete the measurement; at the same time, the adjustment accuracy of the existing transmission shaft system adjustment method is low, and it is impossible to achieve accurate measurement of the long-distance end face of the small-diameter shaft system. Moreover, due to the influence of the spatial position of the horizontal torque meter, the traditional measurement method cannot achieve circular rotation, so the existing adjustment method cannot measure and adjust it to meet its centering adjustment needs.

[0006] Therefore, it is necessary to find a measuring instrument fixture and adjustment method that can provide circumferential rotation, achieve high-precision measurement requirements, and be installed on a high-speed centrifugal pump test bench. Summary of the invention

[0007] The purpose of the present invention is to solve the technical problems that the adjustment tool of the existing transmission shaft system cannot be adapted and installed with the horizontal torque meter of the high-speed centrifugal pump test bench, the adjustment method thereof has low accuracy, cannot meet the requirements of accurate measurement of the end faces of small-diameter shaft systems over longer distances and cannot perform circular rotation measurement, and proposes an adjustment tool and adjustment method for the transmission shaft system of a high-speed centrifugal pump torque meter.

[0008] To achieve the above objectives, the technical solution proposed by the present invention is:

[0009] The adjustment fixture for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench is special in that it includes a rotating assembly, a vernier assembly, a dial indicator assembly, an angle dial and a distance sensor;

[0010] The rotating assembly comprises a rotating shaft and a positioning housing fixed on the pump frame; a mounting hole is axially opened in the positioning housing, and the rotating shaft passes through the mounting hole and is coaxially mounted on the positioning end face of the pump frame; the end of the rotating shaft opposite to the end face to be measured of the transmission shaft system is the rotating shaft measuring end, and the other end is the rotating shaft adjusting end, which is used to adjust the rotation angle of the rotating shaft;

[0011] The distance measuring sensor is installed on the outer circumference of the measuring end of the rotating shaft, and a distance measuring mounting seat for mounting the distance measuring sensor is provided. The end surface of the measuring end of the rotating shaft is axially provided with a table frame mounting groove for connecting the dial indicator assembly, and a vernier frame mounting hole for mounting the vernier assembly is radially provided on the rotating shaft near the measuring end of the rotating shaft;

[0012] The measuring point of the vernier assembly is located on the outer cylindrical surface of the motor output end coupling or the torque meter input end coupling, and is used to measure the coaxiality and end surface parallelism between the motor output end coupling, the torque meter input end coupling and the pump frame positioning end surface on the transmission shaft system;

[0013] The measuring point of the dial gauge assembly is located on the outer circumferential surface of the coupling end face of the torque meter output end, and is used to measure the coaxiality and end face parallelism between the coupling at the output end of the torque meter on the transmission shaft system and the positioning end face of the pump frame;

[0014] The angle scale is arranged on one side of the positioning housing close to the adjusting end of the rotating shaft.

[0015] Furthermore, the vernier assembly includes a vertical support rod, a transverse measuring rod, a vernier and a displacement sensor. One end of the vertical support rod is connected to the rotating assembly through a vernier frame mounting hole. When the vernier frame mounting hole is processed, it is perpendicular to the axis of the rotating shaft. The tolerance between the vertical support rod and the vernier frame mounting hole is H7 / h6, ensuring that they have a small clearance fit, meet the positioning requirements, and facilitate assembly and disassembly to avoid shaking and causing errors. The other end is connected to one end of the transverse measuring rod at a right angle. The other end of the transverse measuring rod is provided with a vernier slide bar for moving the vernier axially along the transmission shaft system, and a top screw groove is provided at the upper end of the vernier slide bar.

[0016] The cursor includes a cursor frame sliding along the cursor slide rod, and a top screw lock matched with the top screw groove is arranged at the upper end of the cursor frame. The top screw lock and the top screw groove cooperate with each other to lock and fix the cursor position; a sensor positioning frame is arranged on one side of the cursor frame, and the displacement sensor is fixedly installed on the sensor positioning frame.

[0017] Furthermore, a triangular reinforcing diagonal brace plate is provided at the connection between the vertical support rod and the transverse measuring rod to ensure the stability of the vernier assembly.

[0018] Furthermore, the dial indicator assembly includes a dial indicator stand and a dial indicator, the dial indicator stand includes two parallel first short rods and a second short rod, one end of the first short rod is connected to one end of the second short rod by an inclined rod, the other end of the first short rod is threadedly connected to the dial indicator stand mounting groove, and the dial indicator is mounted on the second short rod.

[0019] Furthermore, the positioning housing and the pump frame are connected by bolts, and a positioning stop is provided on the connection surface of the positioning housing and the pump frame to ensure the coaxiality and end surface parallelism between the positioning housing and the pump frame, thereby ensuring the stability of the connection;

[0020] Bearings matching the rotating shaft are arranged at both the front and rear ends of the mounting hole;

[0021] The bearing is a deep groove ball bearing, and its axial and radial clearances are both less than 0.01 mm.

[0022] Further, the distance measuring sensor is mounted on the outer circumference of the measuring end of the rotating shaft through a distance measuring mounting seat;

[0023] The distance measuring mounting seat is a U-shaped groove mounting seat, and a limited position step is arranged in the U-shaped groove mounting seat, which is used to adjust the installation position of the distance measuring sensor along the radial direction to ensure the stability of the distance measuring sensor position;

[0024] The distance measuring sensor is used to measure and adjust the coaxiality of the positioning end surface between the motor output end coupling, the torque meter output end coupling and the pump frame, and the parallelism of the end surface between the motor output end coupling, the torque meter output end coupling and the pump frame.

[0025] Furthermore, a rotating handle is provided on the adjusting end of the rotating shaft;

[0026] The rotating handle is engraved with a corner mark corresponding to the angle scale, which is used to accurately adjust the rotation angle of the rotating shaft.

[0027] Furthermore, the angle mark of the highest point of the circumference of the rotating handle is marked as 0°.

[0028] At the same time, the present invention also proposes an adjustment method for a transmission shaft system of a high-speed centrifugal pump torque meter, which uses the above-mentioned adjustment tool for the transmission shaft system of a high-speed centrifugal pump torque meter, and its special feature is that it includes the following steps:

[0029] Step 1: Fix the rotating assembly on the pump frame and initially fix the pump frame on the test bench;

[0030] Step 2: Install and adjust the installation position of the distance measuring sensor by the distance measuring mounting seat on the measuring end of the rotating shaft so that the measuring point of the distance measuring sensor is located on the outer edge of the end face of the coupling close to the output end of the motor;

[0031] Step 3: Install the vernier assembly on the rotating assembly, and adjust the measuring position of the vernier assembly so that its measuring point and the outer circumference of the coupling at the output end of the motor are located on the same circumferential surface;

[0032] Step 4: Rotate the rotating shaft according to the angle on the angle dial, record the measurement data of the cursor assembly when the rotating shaft is at 0°, 90°, 180° and 270°, and calculate the end face deviation and coaxial deviation between the motor output end coupling and the pump frame. According to the above calculation results, adjust the position of the pump frame so that the deviation of the coaxiality and end face parallelism between the motor output end coupling and the pump frame is controlled within ±0.05mm;

[0033] Step 5: Remove the cursor assembly from the rotating assembly and install the dial indicator assembly; install the torque meter between the motor output coupling and the pump frame;

[0034] Step 6: Adjust the measuring point of the distance measuring sensor so that it is located on the outer edge of the end face of the coupling at the output end of the torque meter; adjust the measuring position of the dial indicator assembly so that its measuring point and the outer circumference of the coupling at the output end of the torque meter are located on the same circumferential surface;

[0035] Step 7. Rotate the rotating shaft according to the angle on the angle dial, record the measurement data of the dial indicator assembly when the rotating shaft is at 0°, 90°, 180° and 270°, and calculate the end face parallelism deviation and coaxial deviation between the coupling at the output end of the torque meter and the pump frame. Adjust the position of the torque meter according to the calculation results, so that the deviation of the coaxiality and end face parallelism between the coupling at the output end of the torque meter and the pump frame is controlled within ±0.05mm;

[0036] Step 8. Remove the dial indicator assembly on the rotating assembly and reinstall the vernier assembly; adjust the measuring position of the vernier assembly so that its measuring point is on the same circumference as the outer circumference of the coupling at the input end of the torque meter; rotate the rotating shaft according to the angle on the angle dial, record the measurement data when the rotating shaft is at 90° and 270° respectively, and calculate the coaxial left-right deviation of the coaxial deviation between the coupling at the input end of the torque meter and the pump frame, and adjust the position of the torque meter according to the above calculation results so that the coaxial left-right deviation between the coupling at the input end of the torque meter and the pump frame is controlled within ±0.05mm;

[0037] Step 9: Keep the measuring position of the cursor assembly unchanged, rotate the rotation axis according to the angle on the angle dial, and record the measurement data of the cursor assembly when the rotation axis is at 0°;

[0038] Keep the rotation shaft angle at 0°, adjust the measuring position of the cursor assembly so that its measuring point and the outer circumference of the motor output coupling are located on the same circumference; rotate the rotation shaft according to the angle on the angle dial, measure and record the measurement data of the cursor assembly when the rotation shaft is at 0°;

[0039] Rotate the rotating shaft according to the angle on the angle dial, and record the data of the motor output coupling measured by the vernier assembly when the rotating shaft is at 90°; then keep the rotating shaft angle at 90°, adjust the measuring position of the vernier assembly so that its measuring point is on the same circumference as the outer circumference of the coupling at the input end of the torque meter; measure and record the measurement data of the vernier assembly when the rotating shaft is at 90°;

[0040] Step 10, calculating the coaxial up-down and left-right relative deviations measured by the sliding of the cursor assembly when the coupling at the input end of the torque meter and the coupling at the output end of the motor in step 9 are respectively at 0° and 90°;

[0041] The position of the torque meter is adjusted so that the coaxial deviation between the coupling at the input end of the torque meter and the coupling at the output end of the motor is controlled within ±0.05mm, thereby completing the adjustment of the transmission shaft system of the torque meter of the high-speed centrifugal pump.

[0042] Furthermore, in step 4, the end surface deviation between the coupling at the output end of the motor and the pump frame is measured by a distance measuring sensor, and the calculation formula is as follows:

[0043] Upper and lower end surface deviation = 0° measurement data - 180° measurement data;

[0044] Left and right end face deviation = 90° measurement data - 270° measurement data;

[0045] The coaxial deviation between the coupling at the motor output end and the pump frame is measured by a displacement sensor, and the calculation formula is as follows:

[0046] Upper and lower coaxial deviation = (0° measurement data - 180° measurement data) / 2;

[0047] Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2;

[0048] In step 7, the end surface deviation between the coupling at the output end of the torque meter and the pump frame is measured by a distance measuring sensor, and the calculation formula is as follows:

[0049] Upper and lower end surface deviation = 0° measurement data - 180° measurement data;

[0050] Left and right end face deviation = 90° measurement data - 270° measurement data;

[0051] The coaxial deviation between the coupling at the output end of the torque meter and the pump frame is measured by a dial indicator. The calculation formula is as follows:

[0052] Upper and lower coaxial deviation = (0° measurement data - 180° measurement data) / 2;

[0053] Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2;

[0054] In step eight, the coaxial left-right deviation between the pump frame and the coupling at the input end of the torque meter is measured by a displacement sensor, and the calculation formula is as follows:

[0055] Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2;

[0056] In step 10, the relative deviations of the coaxial up and down and left and right measured by the sliding of the cursor when the coupling at the input end of the torque meter and the coupling at the output end of the motor are respectively at 0° and 90° are calculated as follows:

[0057] Upper and lower coaxial deviation = 0° measurement data of the coupling at the input end of the torque meter - 0° measurement data of the coupling at the output end of the motor;

[0058] Left and right coaxial deviation = 90° measurement data of the coupling at the input end of the torque meter - 90° measurement data of the coupling at the output end of the motor.

[0059] Beneficial effects of the present invention:

[0060] [1] The present invention is used for the adjustment tooling of the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench. The pump frame is used as the installation reference for assembly and adjustment. The structure is simple and easy to disassemble and assemble. The tooling has strong stability, which meets the needs of accurate measurement and debugging of multiple couplings on the transmission shaft system with the same reference. It can not only meet the precise measurement and adjustment of the circumferential rotation of the end faces of the small-diameter shaft system at close distances and at longer distances, but also can accurately measure and adjust the coaxiality of longer distances when the horizontal torque meter cannot rotate axially due to space limitations after installation, effectively improving the adjustment accuracy of the transmission shaft system.

[0061] [2] The present invention installs deep groove ball bearings at both ends of the front and rear ends of the rotating component mounting hole, and maintains a certain distance between the two deep groove ball bearings, thereby ensuring the stability of the rotating shaft during the rotation process, avoiding the problem of radial deviation of the rotating shaft due to rotation force, and effectively improving the stability and reliability of the adjustment tooling.

[0062] [3] The present invention provides a U-shaped groove mounting seat on the outer circumference of the measuring end of the rotating shaft, and a plurality of limit steps are provided in the U-shaped groove mounting seat, so that the installation position of the ranging sensor can be adjusted along the radial direction and the stability of the position of the ranging sensor can be ensured, which not only improves the use flexibility of the adjustment tooling, but also improves the accuracy and reliability of the test data, and enhances the practicality of the adjustment tooling.

[0063] [4] In the present invention, a triangular reinforcing diagonal support plate is provided at the connection between the vertical support rod and the horizontal measuring rod, which can ensure the stability of the cursor assembly and prevent the angle between the horizontal measuring rod and the vertical support rod from being deformed.

[0064] [5] The angle dial of the present invention is installed on the positioning shell near the adjustment end of the rotating shaft, and a corner mark corresponding to the angle dial is provided on the rotating handle to avoid deviation of the rotation angle of the rotating shaft during the rotation process, thereby causing errors in the measurement data and affecting the centering adjustment accuracy, thereby effectively improving the measurement accuracy and adjustment accuracy of the adjustment tooling.

[0065] [6] The present invention is a method for adjusting the transmission shaft system of a horizontal torque meter on a high-speed centrifugal pump test bench. The operation steps are simple and easy to implement. The method performs circumferential rotation measurement on the motor output end coupling, the torque meter input end coupling, the torque meter output end coupling and the pump frame positioning end face, collects multiple groups of measurement data to calculate the end face parallelism deviation and coaxiality deviation, and adjusts the installation positions of the pump frame and the torque meter according to the calculation results, thereby achieving the same reference measurement adjustment, ensuring the installation and debugging accuracy, and meeting the needs of centering adjustment of the shaft system of the horizontal torque meter on the high-speed centrifugal pump test bench. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] Figure 1 It is a structural schematic diagram of the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench in the background technology;

[0067] Figure 2 It is a schematic diagram of the installation structure of the motor, the torque meter, the pump frame and the adjustment tool in the embodiment of the adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench of the present invention;

[0068] Figure 3 It is a schematic diagram of the installation structure of the rotating assembly and the cursor assembly in an embodiment of the present invention;

[0069] Figure 4 It is a structural schematic diagram of a rotating assembly in an embodiment of the present invention;

[0070] Figure 5 A schematic diagram of the structure of a cursor component in an embodiment of the present invention;

[0071] Figure 6 A schematic diagram of the structure of a cursor in an embodiment of the present invention;

[0072] Figure 7 It is a schematic diagram of the installation structure of the rotating assembly and the dial indicator assembly in an embodiment of the present invention;

[0073] Reference numerals:

[0074] 1- pump frame, 2- positioning housing, 3- rotating shaft, 4- mounting hole, 5- bearing, 6- rotating shaft measuring end, 7- rotating shaft adjusting end, 8- distance sensor, 9- distance mounting seat, 10- meter frame mounting slot, 11- motor output end coupling, 12- torque meter input end coupling, 13- torque meter output end coupling, 14- vertical support rod, 15- horizontal measuring rod, 16- cursor, 17- displacement sensor, 18- cursor slide bar, 19- top screw groove, 20- cursor frame, 21- top screw lock, 22- sensor positioning frame, 23- dial indicator frame, 24- dial indicator, 25- first short rod, 26- second short rod, 27- oblique rod, 28- triangular reinforced oblique support plate, 29- positioning stop, 30- rotating handle, 31- angle dial, 32- torque meter, 33- motor, 34- vernier frame mounting hole. DETAILED DESCRIPTION

[0075] like Figure 2 As shown, the adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench includes a rotating assembly, a vernier assembly, a dial indicator assembly, an angle dial 31, a distance sensor 8 and a displacement sensor 17;

[0076] like Figure 3 and Figure 4 As shown, the rotating assembly includes a positioning housing 2 fixed on the pump frame 1, and a rotating shaft 3 coaxially arranged with the positioning housing 2. A positioning stop 29 is arranged on the connecting surface between the positioning housing 2 and the pump frame 1 to ensure the positioning accuracy of the installation between the positioning housing 2 and the pump frame 1. The positioning housing 2 and the pump frame 1 are connected by bolts. After the connection, the pump frame 1 can be converted into a positioning reference with a rotation measurement capability;

[0077] An axial mounting hole 4 is provided in the positioning housing 2, and the rotating shaft 3 is coaxially mounted on the positioning end face of the pump frame 1 through the mounting hole 4. Deep groove ball bearings 5 ​​matching the rotating shaft 3 are provided at both the front and rear ends of the mounting hole 4. A certain distance is maintained between the two bearings 5 ​​installed front and back to ensure that the rotating shaft 3 is more stable during rotation than a single bearing, and to avoid the problem of radial deviation of the rotating shaft 3 due to rotation force. The axial and radial clearances of the bearing 5 are both less than 0.01 mm; the end of the rotating shaft 3 passing through the mounting hole 4 and opposite to the end face to be measured of the transmission shaft system is the rotating shaft measuring end 6, and the other end is the rotating shaft adjusting end 7, which is used to adjust the rotation angle of the rotating shaft 3;

[0078] The distance sensor 8 is installed on the outer circumference of the measuring end 6 of the rotating shaft, and the distance sensor 8 is installed on the U-shaped distance measuring mounting seat 9. A limited step is set in the U-shaped distance measuring mounting seat 9 to adjust the installation position of the distance sensor 8 in the radial direction and ensure the stability of the position of the distance sensor 8; the distance sensor 8 is used to measure the distance from the end face of the pump frame 1 to the motor output end coupling 11, the torque meter output end coupling 13, and the torque meter input end coupling 12 to ensure that the docking clearance of each coupling is within ±0.05mm; the distance sensor 8 is used to measure and adjust the coaxiality between the motor output end coupling 11, the torque meter output end coupling 13 and the positioning end face of the pump frame 1, as well as the parallelism between the motor output end coupling 11, the torque meter output end coupling 13 and the end face of the pump frame 1.

[0079] A meter frame mounting groove 10 for connecting a dial indicator assembly is axially opened on the end surface of the rotating shaft measuring end 6. The meter frame mounting groove 10 is a threaded hole mounting groove of M8×1 and a depth of 10 mm. A vernier frame mounting hole 34 for mounting a vernier assembly is radially opened on one end of the rotating shaft 3 close to the rotating shaft measuring end 6. When the vernier frame mounting hole 34 is processed, it is perpendicular to the axis of the rotating shaft 3.

[0080] The angle scale 31 is arranged on one end face of the positioning housing 2 close to the rotating shaft adjustment end 7; the rotating shaft adjustment end 7 is provided with a rotating handle 30, and the rotating handle 30 is engraved with a corner mark corresponding to the angle scale 31, which is used to accurately adjust the rotation angle of the rotating shaft 3; the corner mark of the highest point of the circumference of the rotating handle 30 is 0°, and the corner marks engraved on the rotating handle 30 at intervals of 90° in the clockwise direction are 90°, 180° and 270°;

[0081] The vernier assembly is used to measure and adjust the coaxiality and parallelism of the positioning end faces between the motor output end coupling 11, the torque meter input end coupling 12 and the pump frame 1 on the transmission shaft system;

[0082] like Figure 5As shown, the vernier assembly includes a vertical support rod 14, a transverse measuring rod 15, a vernier 16 and a displacement sensor 17. One end of the vertical support rod 14 is connected to the rotating assembly through a vernier frame mounting hole 34, and the other end is connected to one end of the transverse measuring rod 15 at a right angle. A triangular reinforcing diagonal brace plate 28 is provided at the connection between the vertical support rod 14 and the transverse measuring rod 15 to ensure the stability of the vernier assembly and prevent the angle between the transverse measuring rod 15 and the vertical support rod 14 from being deformed; limit nuts are provided at the upper and lower ends of the vertical support rod 14 respectively, and the vertical support rod 14 is vertically passed through the vernier frame mounting hole 34, and the vertical support rod 14 and the vernier frame mounting hole 34 are fixed and locked by installing the limit nuts to prevent the position of the vertical support rod 14 from being offset; the tolerance between the vertical support rod 14 and the vernier frame mounting hole 34 is H7 / h6, which ensures that the small clearance fits, meets the positioning requirements and is convenient for assembly and disassembly, and avoids errors caused by shaking;

[0083] The other end of the transverse measuring rod 15 is provided with a cursor slide bar 18 for moving the cursor 16 axially along the transmission shaft system, and the upper end of the cursor slide bar 18 is provided with a top screw groove 19; Figure 6 As shown, the cursor 16 includes a cursor frame 20 that slides along the cursor slide rod 18, and a top screw lock 21 that is compatible with the top screw groove 19 is provided at the upper end of the cursor frame 20. The top screw lock 21 and the top screw groove 19 cooperate with each other to lock and fix the position of the cursor 16, which is used to measure the offset of the coupling at different axial positions; a sensor positioning frame 22 is provided on one side of the cursor frame 20, and the displacement sensor 17 is fixedly installed on the sensor positioning frame 22, which is used to measure the offset of the coupling at different axial positions.

[0084] The selection requirements of the displacement sensor 17 and the distance sensor 8 are: the displacement sensor 17 has a measurement range of 0 to 2 mm and an accuracy error of ±0.2%, and the distance sensor 8 has a measurement range of 0 to 500 mm and an accuracy error of ±0.2%. Both sensors are small in size, light in weight, and easy to install.

[0085] like Figure 7 As shown, the dial indicator assembly is used to measure the coaxiality of the positioning end surface between the coupling 13 at the output end of the torque meter on the transmission shaft system and the pump frame 1, and can also be used to measure the parallelism of the end surface between the coupling 13 at the output end of the torque meter and the pump frame 1;

[0086] The dial indicator assembly includes a dial indicator frame 23 and a dial indicator 24. The dial indicator frame 23 includes two parallel first short rods 25 and second short rods 26. One end of the first short rod 25 is connected to one end of the second short rod 26 through an inclined rod 27. The other end of the first short rod 25 is threadedly connected to the meter frame mounting groove 10. The dial indicator 24 is installed on the second short rod 26.

[0087] The method for adjusting the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench adopts the adjustment tool of the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench, and comprises the following steps:

[0088] Step 1: Fix the rotating assembly on the pump frame 1, then move the pump frame 1 to a position opposite to the motor output shaft, and preliminarily fix the pump frame 1 on the test bench;

[0089] Step 2: Install and adjust the installation position of the distance sensor 8 by the distance measuring mounting seat 9 on the measuring end 6 of the rotating shaft so that the measuring point of the distance sensor 8 can be on the end face of the coupling 11 at the output end of the motor and as close to the outer edge of the end face as possible;

[0090] Step 3, install the vernier assembly on the rotating assembly, fix the vertical support rod 14 in the vernier frame mounting hole 34 and fix the position with a limit nut, adjust the position of the vernier 16 through the vernier slide bar 18 on the horizontal measuring rod 15, so that the measuring point of the displacement sensor 17 on one side of the vernier frame 20 and the outer circumference of the motor output end coupling 11 are located on the same circumferential surface; lock the top screw lock 21 at the upper end of the vernier frame 20 so that it cooperates with the top screw groove 19 to fix the position of the vernier 16;

[0091] Step 4: Compare the angle on the angle scale 31, drive the rotating shaft 3 to rotate by the rotating handle 30 on the rotating shaft adjustment end 7, and record the measurement data of the distance sensor 8 and the displacement sensor 17 when the rotating shaft 3 is at 0°, 90°, 180° and 270° respectively. The end surface deviation between the motor output end coupling 11 and the pump frame 1 is measured by the distance sensor 8 as follows:

[0092] Upper and lower end surface deviation = 0° measurement data - 180° measurement data;

[0093] Left and right end face deviation = 90° measurement data - 270° measurement data;

[0094] The coaxial deviation between the motor output coupling 11 and the pump frame 1 is measured by the displacement sensor 17 as follows: upper and lower coaxial deviation = (0° measurement data - 180° measurement data) / 2;

[0095] Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2;

[0096] According to the above calculation results, the end face deviation and coaxial deviation are adjusted by adding or subtracting copper gaskets between the pump frame 1 and the test bench and moving the horizontal position of the pump frame, so that the deviation of the coaxiality and end face parallelism between the motor output end coupling 11 and the pump frame 1 is controlled within ±0.05mm; the adjustment principle is to adjust the end face deviation of the pump frame 1 first, and then adjust the coaxial deviation of the pump frame 1. The pump frame 1 is repeatedly measured and adjusted from semi-tightened until the pump frame 1 is completely tightened and fixed on the test bench;.

[0097] Step 5: Disassemble the cursor assembly on the rotating assembly, and thread the first short rod 25 in the dial indicator assembly to the meter frame mounting groove 10, install the dial indicator 24 on the second short rod 26, and then install the torque meter between the motor output shaft and the pump frame 1;

[0098] Step 6: Adjust the measuring point of the distance measuring sensor 8 so that it measures on the end face of the coupling 13 at the output end of the torque meter and as close to the outer edge of the end face as possible; adjust the measuring position of the dial indicator assembly so that its measuring point and the outer circumference of the coupling 13 at the output end of the torque meter are located on the same circumferential surface;

[0099] Step 7: Compare the angle on the angle dial 31, drive the rotating shaft 3 to rotate by the rotating handle 30 on the rotating shaft adjustment end 7, and record the measurement data of the dial indicator and the distance sensor 8 when the rotating shaft 3 is at 0°, 90°, 180° and 270° respectively. The end surface deviation between the coupling 13 at the output end of the torque meter and the pump frame 1 is measured by the distance sensor 8 and calculated as:

[0100] Upper and lower end surface deviation = 0° measurement data - 180° measurement data;

[0101] Left and right end face deviation = 90° measurement data - 270° measurement data;

[0102] The coaxial deviation between the coupling 13 at the output end of the torque meter and the pump frame 1 is measured by a dial gauge 24 and calculated as:

[0103] Upper and lower coaxial deviation = (0° measurement data - 180° measurement data) / 2;

[0104] Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2;

[0105] Adjust the position of the torque meter according to the calculation results so that the deviation of the coaxiality and end surface parallelism between the torque meter output end coupling 13 and the pump frame 1 is controlled within ±0.05mm;

[0106] According to the basic principle of parallel lines, after determining the two parallel relationships of "motor output end coupling 11∥ pump frame 1 end face", "pump frame 1 end face∥ torque meter output end coupling 13", and "pump frame 1 end face∥ torque meter input end coupling 12", it is possible to deduce and determine "motor output end coupling 11∥ torque meter input end coupling 12". Therefore, it is only necessary to measure and adjust the coaxial deviation of the motor coupling and the torque meter input end coupling 12;

[0107] Step 8, remove the dial indicator assembly on the rotating assembly and reinstall the vernier assembly; adjust the position of the vernier 16 through the vernier slide bar 18 on the transverse measuring rod 15, so that the measuring point of the displacement sensor 17 on one side of the vernier frame 20 and the outer circumference of the coupling 12 at the input end of the torque meter are located on the same circumferential surface; rotate the rotating shaft 3 by referring to the angle on the angle dial 31 through the rotating shaft adjustment end 7, and record the measurement data of the displacement sensor 17 when the rotating shaft 3 is at 90° and 270° respectively, and measure the coaxial left and right deviation between the pump frame 1 and the coupling 12 at the input end of the torque meter and calculate it as:

[0108] Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2;

[0109] According to the above calculation results, the position of the torque meter is adjusted so that the coaxial left-right deviation between the coupling 12 at the input end of the torque meter and the pump frame 1 is controlled within ±0.05mm;

[0110] Step 9: Keep the measuring position of the cursor assembly unchanged, rotate the rotating shaft 3 according to the angle on the angle scale 31, and record the measuring data of the cursor assembly when the rotating shaft 3 is at 0°;

[0111] Keep the rotation axis angle at 0°; adjust the measuring position of the cursor assembly so that its measuring point is located on the same circumference as the outer circumference of the motor output coupling 11; measure and record the measurement data of the cursor assembly when the rotation axis 3 is at 0°;

[0112] Rotate the rotating shaft 3 according to the angle on the angle dial 31, and record the data of the motor output coupling 11 measured by the vernier component when the rotating shaft is at 90°; keep the rotating shaft angle at 90°, adjust the measuring position of the vernier component so that its measuring point is on the same circumference as the outer circumference of the coupling 12 at the input end of the torque meter, and measure and record the measurement data of the vernier component when the rotating shaft 3 is at 90°;

[0113] Step 10: Calculate the relative deviations of the coaxial up and down and left and right measured by the cursor sliding when the coupling 12 at the input end of the torque meter and the coupling 11 at the output end of the motor in step 9 are respectively at 0° and 90°:

[0114] Upper and lower coaxial deviation = 0° measurement data of coupling 12 at the input end of torque meter - 0° measurement data of coupling 11 at the output end of motor;

[0115] Left and right coaxial deviation = 90° measurement data of coupling 12 at the input end of torque meter - 90° measurement data of coupling 11 at the output end of motor;

[0116] The position of the torque meter 32 is adjusted by adding or subtracting copper gaskets between the torque meter and the test bench and moving the horizontal position of the torque meter, so that the coaxial deviation between the coupling 12 at the input end of the torque meter and the coupling 11 at the output end of the motor is controlled within ±0.05mm, and the torque meter is fixed on the test bench, thereby completing the adjustment of the transmission shaft system of the high-speed centrifugal pump torque meter.

Claims

1. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench is characterized by: It comprises a rotating assembly, a vernier assembly, a dial indicator assembly, an angle scale (31) and a distance measuring sensor (8); The rotating assembly comprises a rotating shaft (3) and a positioning housing (2) fixed on the pump frame (1); a mounting hole (4) is axially opened in the positioning housing (2), and the rotating shaft (3) passes through the mounting hole (4) and is coaxially mounted on the positioning end face of the pump frame (1); the end of the rotating shaft (3) opposite to the end face to be measured of the transmission shaft system is a rotating shaft measuring end (6), and the other end is a rotating shaft adjusting end (7) for adjusting the rotation angle of the rotating shaft (3); The distance measuring sensor (8) is mounted on the outer circumference of the rotating shaft measuring end (6); a meter frame mounting groove (10) for connecting a dial indicator assembly is axially opened on the end surface of the rotating shaft measuring end (6); and a vernier frame mounting hole (34) for mounting a vernier assembly is radially opened on the rotating shaft (3) near the rotating shaft measuring end (6); The measuring point of the cursor assembly is located on the outer circumferential surface of the motor output end coupling (11) or the torque meter input end coupling (12), and is used to measure the coaxiality and end surface parallelism between the motor output end coupling (11), the torque meter input end coupling (12) and the positioning end surface of the pump frame (1) on the transmission shaft system; The measuring point of the dial gauge assembly is located on the outer circumferential surface of the end face of the torque meter output end coupling (13), and is used to measure the coaxiality and end face parallelism between the torque meter output end coupling (13) and the positioning end face of the pump frame (1) on the transmission shaft system; The angle scale (31) is arranged on a side of the positioning housing (2) close to the rotating shaft adjustment end (7).

2. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 1 is characterized by: The vernier assembly comprises a vertical support rod (14), a transverse measuring rod (15), a vernier (16) and a displacement sensor (17); one end of the vertical support rod (14) is connected to the rotating assembly through a vernier frame mounting hole (34), and the other end is connected to one end of the transverse measuring rod (15) at a right angle; a vernier slide rod (18) for moving the vernier (16) axially along the transmission shaft system is arranged on the other end of the transverse measuring rod (15); a top screw groove (19) is arranged on the upper end of the vernier slide rod (18); The cursor (16) comprises a cursor frame (20) sliding along a cursor slide bar (18); a top screw lock (21) matching with a top screw groove (19) is arranged at the upper end of the cursor frame (20); the top screw lock (21) and the top screw groove (19) cooperate with each other to lock and fix the position of the cursor (16); a sensor positioning frame (22) is arranged on one side of the cursor frame (20); and the displacement sensor (17) is fixedly mounted on the sensor positioning frame (22).

3. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 2 is characterized by: A triangular reinforced diagonal brace plate (28) is provided at the connection between the vertical support rod (14) and the transverse measuring rod (15) to ensure the stability of the cursor assembly.

4. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 1 or 2, characterized in that: The dial gauge assembly comprises a dial gauge frame (23) and a dial gauge (24); the dial gauge frame (23) comprises two first short rods (25) and a second short rod (26) which are parallel to each other; one end of the first short rod (25) is connected to one end of the second short rod (26) via an inclined rod (27); the other end of the first short rod (25) is threadedly connected to a gauge frame mounting groove (10); and the dial gauge (24) is mounted on the second short rod (26).

5. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 4 is characterized by: The positioning housing (2) and the pump frame (1) are connected by bolts, and a positioning stop (29) is provided on the connection surface between the positioning housing (2) and the pump frame (1) to ensure the coaxiality and end surface parallelism between the positioning housing (2) and the pump frame (1); Bearings (5) matching the rotating shaft (3) are provided at both the front and rear ends of the mounting hole (4); The bearing (5) is a deep groove ball bearing, and its axial and radial clearances are both less than 0.01 mm.

6. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 5 is characterized by: The distance measuring sensor (8) is mounted on the outer circumference of the measuring end (6) of the rotating shaft via a distance measuring mounting seat (9); The distance measuring mounting seat (9) is a U-shaped groove mounting seat, and a limited position step is arranged in the U-shaped groove mounting seat for adjusting the installation position of the distance measuring sensor (8) along the radial direction; The distance measuring sensor (8) is used to measure the coaxiality of the positioning end faces between the motor output end coupling (11), the torque meter output end coupling (13) and the pump frame (1), and the parallelism of the end faces between the motor output end coupling (11), the torque meter output end coupling (13) and the pump frame (1).

7. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 6 is characterized by: A rotating handle (30) is provided on the rotating shaft adjustment end (7); The rotating handle (30) is engraved with a corner mark corresponding to the angle scale (31) for accurately adjusting the rotation angle of the rotating shaft (3).

8. The adjustment tool for the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 7 is characterized by: The angle mark of the highest point of the circumference of the rotating handle (30) is marked as 0°.

9. A method for adjusting the transmission shaft system of a horizontal torque meter for a high-speed centrifugal pump test bench, using the adjustment tool for the transmission shaft system of a horizontal torque meter for a high-speed centrifugal pump test bench as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: fix the rotating assembly on the pump frame (1), and preliminarily fix the pump frame (1) on the test bench; Step 2: Install and adjust the installation position of the distance sensor (8) by using the distance measuring mounting seat (9) on the measuring end (6) of the rotating shaft so that the measuring point of the distance sensor (8) is located on the outer edge of the end face of the coupling (11) close to the output end of the motor; Step 3: Install the vernier assembly on the rotating assembly, and adjust the measuring position of the vernier assembly so that its measuring point and the outer circumference of the motor output end coupling (11) are located on the same circumferential surface; Step 4: Rotate the rotating shaft (3) according to the angle on the angle scale (31), record the measurement data of the cursor assembly when the rotating shaft (3) is located at 0°, 90°, 180° and 270°, and calculate the end face deviation and coaxial deviation between the motor output end coupling (11) and the pump frame (1), and adjust the position of the pump frame (1) according to the above calculation results, so that the deviation of the coaxiality and end face parallelism between the motor output end coupling (11) and the pump frame (1) is controlled within ±0.05 mm; Step 5: Remove the cursor assembly from the rotating assembly and install the dial indicator assembly; install the torque meter (32) between the motor output coupling (11) and the pump frame (1); Step 6: Adjust the measuring point of the distance measuring sensor (8) so that it is located on the outer edge of the end face of the coupling (13) at the output end of the torque meter; adjust the measuring position of the dial indicator assembly so that its measuring point and the outer circumference of the coupling (13) at the output end of the torque meter are located on the same circumferential surface; Step 7, rotating the rotating shaft (3) according to the angle on the angle scale (31), recording the measurement data of the dial indicator assembly when the rotating shaft (3) is located at 0°, 90°, 180° and 270°, respectively, and calculating the end face parallelism deviation and coaxial deviation between the torque meter output end coupling (13) and the pump frame (1), and adjusting the position of the torque meter (32) according to the calculation results, so that the coaxiality and end face parallelism deviation between the torque meter output end coupling (13) and the pump frame (1) are controlled within ±0.05 mm; Step 8, remove the dial indicator assembly on the rotating assembly and reinstall the vernier assembly; adjust the measuring position of the vernier assembly so that its measuring point and the outer circumference of the torque meter input end coupling (12) are located on the same circumference; rotate the rotating shaft (3) according to the angle on the angle dial (31), record the measurement data when the rotating shaft (3) is located at 90° and 270° respectively, and calculate the coaxial left-right deviation of the coaxial deviation between the torque meter input end coupling (12) and the pump frame (1), and adjust the position of the torque meter (32) according to the above calculation result so that the coaxial left-right deviation between the torque meter input end coupling (12) and the pump frame (1) is controlled within ±0.05mm; Step 9: Keep the measuring position of the cursor assembly unchanged, rotate the rotating shaft (3) according to the angle on the angle scale (31), and record the measurement data of the cursor assembly when the rotating shaft (3) is at 0°; The angle of the rotating shaft is kept at 0°, and the measuring position of the cursor assembly is adjusted so that the measuring point and the outer circumference of the motor output end coupling (11) are located on the same circumference; the rotating shaft (3) is rotated according to the angle on the angle dial (31), and the measurement data of the cursor assembly when the rotating shaft (3) is located at 0° is measured and recorded; Rotate the rotating shaft (3) according to the angle on the angle scale (31), and record the data of the motor output end coupling (11) measured by the vernier component when the rotating shaft (3) is at 90°; then keep the rotating shaft angle at 90°, adjust the measuring position of the vernier component so that its measuring point and the outer circumference of the torque meter input end coupling (12) are located on the same circumferential surface; measure and record the measurement data of the vernier component when the rotating shaft (3) is at 90°; Step 10, calculating the coaxial up-down and left-right relative deviations measured by the sliding of the cursor assembly when the torque meter input end coupling (12) and the motor output end coupling (11) are respectively located at 0° and 90° in step 9; The position of the torque meter (32) is adjusted so that the coaxial deviation between the coupling (12) at the input end of the torque meter and the coupling (11) at the output end of the motor is controlled within ±0.05 mm, thereby completing the adjustment of the transmission shaft system of the torque meter of the high-speed centrifugal pump.

10. The method for adjusting the transmission shaft system of the horizontal torque meter of the high-speed centrifugal pump test bench according to claim 9, characterized in that: In step 4, the end surface deviation between the motor output end coupling (11) and the pump frame (1) is measured by the distance measuring sensor (8), and the calculation formula is as follows: Upper and lower end surface deviation = 0° measurement data - 180° measurement data; Left and right end face deviation = 90° measurement data - 270° measurement data; The coaxial deviation between the motor output end coupling (11) and the pump frame (1) is measured by a displacement sensor (17), and the calculation formula is as follows: Upper and lower coaxial deviation = (0° measurement data - 180° measurement data) / 2; Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2; In step 7, the end surface deviation between the coupling (13) at the output end of the torque meter and the pump frame (1) is measured by a distance measuring sensor (8), and the calculation formula is as follows: Upper and lower end surface deviation = 0° measurement data - 180° measurement data; Left and right end face deviation = 90° measurement data - 270° measurement data; The coaxial deviation between the coupling (13) at the output end of the torque meter and the pump frame (1) is measured by a dial gauge (24) and the calculation formula is as follows: Upper and lower coaxial deviation = (0° measurement data - 180° measurement data) / 2; Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2; In step eight, the coaxial left-right deviation between the pump frame (1) and the coupling (12) at the input end of the torque meter is measured by the displacement sensor (17), and the calculation formula is as follows: Left and right coaxial deviation = (90° measurement data - 270° measurement data) / 2; In step 10, when the torque meter input end coupling (12) and the motor output end coupling (11) are respectively located at 0° and 90°, the coaxial up-down and left-right relative deviations measured by the sliding of the cursor are calculated as follows: Upper and lower coaxial deviation = 0° measurement data of the coupling (12) at the input end of the torque meter - 0° measurement data of the coupling (11) at the output end of the motor; Left and right coaxial deviation = 90° measurement data of the coupling (12) at the input end of the torque meter - 90° measurement data of the coupling (11) at the output end of the motor.

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