A dynamic and static balance test device for rake teeth of a rake dryer

Abstract

The present invention relates to the technical field of dynamic and static balance testing devices, and specifically to a dynamic and static balance testing device for rake teeth of a rake dryer. It includes a rake shaft, a frame, and a plurality of rake teeth installed on the rake shaft, and also includes: two symmetrically arranged clamping transmission modules, a transmission gap for driving the rake shaft is provided between the two clamping transmission modules, a transmission motor for driving the clamping transmission module is installed on the frame, two measuring pieces arranged vertically at 90°, the measuring pieces are used to test the radial runout of the rake shaft, and two linear drive modules, both of which are connected to the test frame in a transmission manner. The beneficial effects of the present invention are: when the present invention is working, it can automatically complete the dynamic and static balance test operation of the rake teeth of the rake dryer, and when the device is in the test operation, it can also realize the dynamic counterweighting of the rake teeth and the balance test after the dynamic counterweighting, thereby effectively improving the test function and test accuracy of the device.

Description

Technical Field

[0001] The invention relates to the technical field of dynamic and static balance testing devices, in particular to a dynamic and static balance testing device for rake teeth of a rake dryer. Background Art

[0002] The rake dryer is a high-efficiency drying equipment that is based on the technology of the traditional vacuum rake dryer in China and is designed to strengthen and improve the characteristics of various materials such as slurry, paste, granular, powder, fiber, etc. Its transmission part adopts a stable and durable cylindrical gear reducer, and the driving shaft is thickened to a solid shaft to ensure stable operation in various harsh working environments. The rake dryer has the advantages of simple structure, small footprint, easy operation, and wide application range, so it has been widely used in industrial production.

[0003] However, before the rake dryer leaves the factory, a key step is to conduct a dynamic and static balance test on its rake teeth to ensure the stability and reliability of the equipment during operation. Dynamic and static balance testing is crucial for any rotating component, which is directly related to the vibration level, noise control, service life and overall performance of the equipment.

[0004] There are many types of balance test devices in the prior art, such as a UAV propeller dynamic balance test device disclosed in the patent document with publication number CN114046935A, which improves the accuracy of the test by fixing a laser ray meter. However, this type of device is not suitable for the rake tooth test of a rake dryer. The rake tooth structure of a rake dryer is complex, and it is necessary to simulate the dynamic balance state in the actual working scene, so a more professional and accurate test device is needed.

[0005] At present, there is a lack of a dynamic and static balance test device designed specifically for the rake teeth of a rake dryer on the market, which may lead to problems such as insufficient accuracy and low test efficiency during the test process. In order to solve this technical problem, the present invention proposes a dynamic and static balance test device for the rake teeth of a rake dryer, which aims to improve the accuracy and efficiency of the test and ensure the quality stability of the rake dryer before leaving the factory. Summary of the invention

[0006] The invention aims at the technical problems existing in the prior art and provides a dynamic and static balance test device for rake teeth of a rake dryer to solve the problem that the prior art lacks a special dynamic and static balance test device suitable for rake teeth of a rake dryer.

[0007] The technical solution of the present invention to solve the above technical problems is as follows: a dynamic and static balance test device for rake teeth of a rake dryer, comprising a rake shaft, a frame and a plurality of groups of rake teeth installed on the rake shaft, and also comprising:

[0008] Two symmetrically arranged clamping transmission modules, a transmission gap for driving the rake shaft is arranged between the two clamping transmission modules, and a transmission motor for driving the clamping transmission modules is installed on the frame;

[0009] Two measuring pieces arranged vertically at 90 degrees, the measuring pieces are used to test the radial runout of the rake shaft;

[0010] Two linear drive modules, both of which are transmission-connected with a test frame, the inner wall of the test frame is rotationally connected with a driven rotating ring, a counterweight frame is provided on the inner side of the driven rotating ring, a magnetic block is installed on the bottom surface of the counterweight frame, a group of T-shaped sliding rods are slidably connected between the counterweight frame and the driven rotating ring, the inner wall of the counterweight frame is rotationally connected with an adjusting screw rod, the adjusting screw rod is transmission-connected with a counterweight block, a vibration sensor is installed on the counterweight block, and a guide module for driving the adjusting screw rod to rotate is installed on the test frame;

[0011] Two symmetrically arranged supporting members are used for supporting the rake shaft and radially monitoring the radial runout amplitude of the rake shaft.

[0012] Based on the above technical solution, the present invention can also be improved as follows.

[0013] Furthermore, the two clamping transmission modules each include a group of annular driving belts, two driving rollers rotatably connected to the frame and a tensioning frame slidably connected to the frame, a group of tensioning springs are installed between the tensioning frame and the frame, a tensioning roller is rotatably connected between the inner surfaces of the tensioning frame, the two driving rollers and the tensioning roller are both drivingly connected to the annular driving belts, the output shaft end of the transmission motor is fixedly connected to a driving roller on the clamping transmission module, and the annular driving belts on the two clamping transmission modules are staggered.

[0014] The beneficial effect of adopting the above-mentioned further scheme is that before the rake shaft is tested, the rake shaft is installed between two clamping transmission modules and fits with the annular drive belts in the two clamping transmission modules; when the balance test of the rake shaft and the rake teeth is performed, the annular drive belt in the clamping transmission module connected to the transmission motor is actively rotated, and the annular drive belt in the clamping transmission module not connected to the transmission motor is driven to rotate; after the annular drive belt rotates, it drives the rake shaft to rotate at a set speed, and this clamping mode allows the rake shaft to move freely in multiple directions, thereby effectively reducing the influence of the transmission mechanism resistance on the accuracy of the rake tooth dynamic balance test.

[0015] Furthermore, a single chip microcomputer and a weight rack are respectively installed on the rack, a group of weights are stacked on the weight rack, a speed sensor facing the rake shaft is installed on the rack, and the data end of the speed sensor is connected to the single chip microcomputer data.

[0016] The beneficial effect of adopting the above further scheme is that when the transmission motor drives the rake shaft to rotate, the speed sensor monitors the speed data of the rake shaft in real time, and the speed sensor feeds back the monitored data to the single-chip microcomputer in real time. When it is necessary to manually balance the weight on the rake teeth, a weight with a specified weight can be selected and the weight can be magnetically attracted to the specified rake teeth, and then the weight of the rake tooth balance weight can be changed;

[0017] Both the microcontroller and the speed sensor can be customized or selected according to actual needs.

[0018] Furthermore, the measuring part includes a limit ring installed on the frame, a detection rod slidably connected to the limit ring, a monitoring head is installed on the end of the detection rod, a universal ball is embedded in the monitoring head, the universal ball is fit with the rake shaft, limit springs are sleeved on the detection rod and at positions corresponding to both sides of the limit ring, a ranging probe arranged opposite to the detection rod is installed on the frame, the data end of the ranging probe is connected to the data of the single-chip computer, and the axis of the detection rod is perpendicular to the axis of the rake shaft.

[0019] The beneficial effect of adopting the above further scheme is that when the rake shaft is limited by the two clamping transmission modules, under the action of the limit spring, the universal ball on the detection rod is tightly fitted with the rake shaft. When the universal ball is tightly fitted with the rake shaft, the single chip microcomputer controls the two distance measuring probes to automatically calibrate to zero.

[0020] When the rake shaft is rotated by the annular drive belt and the rake shaft has radial runout, the universal ball drives the detection rod to move. After the detection rod moves, the feedback data of the ranging probe is changed. The single-chip microcomputer obtains the data feedback of the ranging probe to measure the radial runout value of the rake shaft when it rotates, and then quickly measures the balance data of the rake teeth.

[0021] Further, the guide module includes a transmission ring rotatably connected to the test frame, the transmission ring is rotatably sleeved on the driven rotating ring, the transmission ring is respectively installed with an active bevel gear ring and a passive bevel gear ring, a motor is installed on the test frame, the motor has an encoder connected to the data of the single-chip computer, a driving gear is installed on the output shaft end of the motor, the driving gear is transmission connected to the passive gear ring, the inner wall of the driven rotating ring is rotatably connected with a guide shaft, the top end of the guide shaft is fixedly installed with a driven bevel gear, the driven bevel gear is transmission connected to the active bevel gear ring, and the adjusting screw is driven by the guide shaft.

[0022] The beneficial effect of adopting the above further scheme is that when the static balance test of the rake teeth is performed, the counterweight frame and the positioning magnetic block are magnetically attracted to each other, and the magnetic block is not connected to the rake shaft, and then the counterweight operation is not performed on the rake teeth;

[0023] In the non-counterweight mode, the rake shaft rotates at a set speed. After the rake shaft rotates, the static balance test of the rake teeth is then performed.

[0024] When it is necessary to perform a dynamic balance test on the rake teeth, the rake shaft rotates at a set speed, the counterweight frame is separated from the positioning magnetic block, the magnetic block and the rake shaft are magnetically attracted as one, and the counterweight weight of the counterweight block on the rake teeth is adjusted by setting the position of the counterweight blocks in the two counterweight frames, and the positions of the two test frames are adjusted respectively by setting the two linear drive modules, and the positions of the two test frames are limited by the positions, so as to adjust the counterweight positions of the two counterweight frames on the rake teeth respectively;

[0025] After the above state adjustment is completed, the rake shaft rotates at the set speed, and then the counterweight dynamic balance test of the rake teeth is carried out;

[0026] During the dynamic balance test, the counterweight weight and counterweight position of the rake teeth can be adjusted independently, thereby meeting different test parameters during the rake tooth test, thereby realizing multi-parameter testing of the rake teeth, and effectively improving the test accuracy during the dynamic balance test of the rake teeth;

[0027] During the dynamic balancing test, the driven rotating ring rotates synchronously with the harrow shaft at the same speed. At the same time, the speed measuring structure of the speed sensor is set to make the rotation speed of the transmission ring the same as the rotation speed of the driven rotating ring and the harrow shaft, thereby keeping the active bevel gear ring and the driven bevel gear relatively still, thereby keeping the adjusting screw still.

[0028] Furthermore, a connecting groove with a top opening fixedly opened inside the adjusting screw rod and slidably connected to the guide shaft rod, the cross-sections of the connecting groove and the guide shaft rod are both regular polygons, and the axes of the guide shaft rod and the guide rod are both perpendicular to the rotation axis of the driven rotating ring.

[0029] The beneficial effect of adopting the above-mentioned further scheme is that, when in use, through the regular polygonal cross-section setting of the connecting groove and the guide shaft, when the counterweight frame moves with the runout of the rake shaft, the guide shaft can continuously drive the adjusting screw, thereby effectively ensuring the test accuracy of the device and allowing the counterweight frame to move freely during the test, and then performing a balance test.

[0030] Furthermore, the lifting member includes a lifting arm, the lifting arm is hinged to the frame, an arm adjustment push rod is hinged between the lifting arm and the frame, the lifting arm is rotatably connected to a lifting wheel, a ring bag is installed on the lifting wheel, the ring bag is fit with the rake shaft, an air guide channel connected to the inner cavity of the ring bag is fixedly opened inside the lifting wheel, an air pressure probe for monitoring the internal air pressure of the air guide channel is installed at the axial position of the lifting wheel, and the data end of the air pressure probe is connected to the data of the single-chip computer.

[0031] The beneficial effect of adopting the above further solution is that when the rake shaft and the rake teeth need to be installed on the device, the lifting arm is arranged at a set angle, thereby facilitating the rapid installation of the rake shaft and the rake teeth on the device;

[0032] After the initial installation of the rake shaft, the angles of the two lifting arms are set so that the lifting wheels can effectively support the rake shaft, and the rake shaft is kept in a horizontal state when supported. After the rake shaft is supported, the feedback value of the air pressure probe is automatically calibrated to zero. After the data of the air pressure probe is calibrated to zero, when the rake shaft undergoes radial runout, the data of the two air pressure probes will change passively. By monitoring the feedback values ​​of the two air pressure probes, the balance of the rake shaft and the rake teeth can be assisted in judging.

[0033] Furthermore, it also includes a position-limiting protective tube installed on the frame, wherein a protective groove with openings at both ends is fixedly opened inside the position-limiting protective tube, and the radius of the protective groove is 1.1 to 1.2 times the radius of the rake shaft.

[0034] The beneficial effect of adopting the above further solution is that the movable range of the rake shaft is limited by setting the limiting protective tube and the protective groove, thereby improving the safety during the rake shaft test.

[0035] Furthermore, the linear drive module includes a drive motor installed on a frame, a transmission screw is fixedly installed on the output shaft end of the drive motor, the transmission screw is transmission-connected to a test frame at a corresponding position, and the axis of the transmission screw is parallel to the axis of the driven rotating ring.

[0036] Furthermore, a positioning magnetic block is installed on the inner wall of the driven rotating ring and directly opposite to the counterweight frame, and the positioning magnetic block is magnetically matched with the counterweight frame.

[0037] The beneficial effect of adopting the above further solution is that, when in use, by setting the positioning magnetic block, the counterweight frame is magnetically attracted to the driven rotating ring in the non-counterweight test mode and the position of the counterweight frame on the driven rotating ring is limited.

[0038] The beneficial effects of the present invention are:

[0039] 1. When the present invention is working, it can automatically complete the dynamic and static balance test of the rake teeth of the rake dryer. During the test operation, the device can also realize the dynamic weighting of the rake teeth and the balance test after the dynamic weighting, thereby effectively improving the test function and test accuracy of the device.

[0040] 2. In the present invention, when the static balance test of the rake teeth is performed, the counterweight frame and the positioning magnetic block are magnetically integrated, the magnetic block is not connected to the rake shaft, and then the counterweight operation is not performed on the rake teeth. In the non-counterweight mode, the rake shaft rotates at a set speed. After the rake shaft rotates, the static balance test of the rake teeth is then performed. When the dynamic balance test of the rake teeth is required, the rake shaft rotates at a set speed, the counterweight frame is separated from the positioning magnetic block, the magnetic block and the rake shaft are magnetically integrated, and the position of the counterweight blocks in the two counterweight frames is set to adjust the counterweight weight of the rake teeth. By setting two linear drive modules, the positions of the two test frames are adjusted respectively, and by limiting the positions of the two test frames, the counterweight positions of the two counterweight frames on the rake teeth are adjusted respectively. After the above-mentioned state is adjusted, the rake shaft rotates at a set speed, and then the counterweight dynamic balancing test of the rake teeth is carried out. During the dynamic balancing test, the counterweight weight and counterweight position of the rake teeth can be adjusted independently, and then different test parameters during the rake tooth test can be met, thereby realizing multi-parameter testing of the rake teeth, so as to effectively improve the test accuracy during the dynamic balancing test of the rake teeth.

[0041] 3. In the present invention, after the rake shaft is initially installed, the angles of the two lifting arms are set so that the lifting wheels can effectively support the rake shaft, and the rake shaft is kept in a horizontal state when supported. After the rake shaft is supported, the feedback value of the air pressure probe is automatically zeroed. After the data of the air pressure probe is zeroed, when the rake shaft undergoes radial runout, the data of the two air pressure probes undergo slave changes. By monitoring the feedback values ​​of the two air pressure probes, the balance of the rake shaft and the rake teeth can be assisted in judging.

[0042] 4. In the present invention, before the rake shaft is tested, the rake shaft is installed between two clamping transmission modules and fits with the annular drive belts in the two clamping transmission modules. When the balance test of the rake shaft and the rake teeth is performed, the annular drive belt in the clamping transmission module connected to the transmission motor is actively rotated, and the annular drive belt in the clamping transmission module not connected to the transmission motor is driven to rotate. After the annular drive belt rotates, it drives the rake shaft to rotate at a set speed. This clamping mode allows the rake shaft to move freely in multiple directions, thereby effectively reducing the influence of the transmission mechanism resistance on the accuracy of the rake tooth dynamic balance test. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic diagram of the overall structure of a dynamic and static balance test device for rake teeth of a rake dryer according to the present invention;

[0044] Figure 2 For the present invention Figure 1 A schematic diagram of the local enlarged structure at point A in the middle;

[0045] Figure 3 For the present invention Figure 1 A schematic diagram of the structure from another perspective;

[0046] Figure 4 For the present invention Figure 3 A schematic diagram of the local enlarged structure at B in the middle;

[0047] Figure 5 It is a schematic diagram of the structure of the ring bag and the lifting arm of the present invention;

[0048] Figure 6 It is a structural schematic diagram of the rake shaft and rake teeth of the present invention;

[0049] Figure 7 It is a structural schematic diagram of the speed sensor and the transmission motor of the present invention;

[0050] Figure 8 For the present invention Figure 7 A schematic diagram of the local enlarged structure at C in the middle;

[0051] Fig. 9 It is a schematic structural diagram of the adjusting screw rod and the T-shaped sliding rod of the present invention.

[0052] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0053] 1. Rake shaft; 2. Rake teeth; 3. Drive motor; 4. Linear drive module; 5. Test stand; 6. Driven rotating ring; 7. Counterweight rack; 8. Magnetic block; 9. Adjusting screw rod; 10. Counterweight block; 11. Vibration sensor; 12. Ring drive belt; 13. Frame; 14. Drive roller; 15. Tensioning frame; 16. Tensioning spring; 17. Tensioning roller; 18. Single chip microcomputer; 19. Weight rack; 20. Speed ​​sensor sensor; 21. limit ring; 22. detection rod; 23. universal ball; 24. limit spring; 25. distance measuring probe; 26. transmission ring; 27. active bevel gear ring; 28. passive gear ring; 29. ​​motor; 30. active gear; 31. guide shaft; 32. T-shaped slide bar; 33. lifting arm; 34. adjusting arm push rod; 35. lifting wheel; 36. ring bag; 37. air pressure probe; 38. limit protective tube. DETAILED DESCRIPTION

[0054] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0055] The present invention provides the following preferred embodiments

[0056] like Figure 1-9 As shown, a dynamic and static balance test device for rake teeth of a rake dryer includes a rake shaft 1, a frame 13 and a plurality of rake teeth 2 mounted on the rake shaft 1, and also includes:

[0057] Two symmetrically arranged clamping transmission modules, a transmission gap for driving the rake shaft 1 is arranged between the two clamping transmission modules, and a transmission motor 3 for driving the clamping transmission modules is installed on the frame 13;

[0058] The frame 13 is respectively provided with a single chip microcomputer 18 and a weight rack 19, a group of weights are stacked on the weight rack 19, and a speed sensor 20 arranged opposite to the rake shaft 1 is installed on the frame 13, and the data end of the speed sensor 20 is connected to the single chip microcomputer 18;

[0059] When the transmission motor 3 drives the rake shaft 1 to rotate, the speed sensor 20 monitors the speed data of the rake shaft 1 in real time, and the speed sensor 20 feeds back the monitored data to the single-chip microcomputer 18 in real time. When it is necessary to manually balance the weight on the rake teeth 2, a weight with a specified weight can be selected and the weight can be magnetically attracted to the specified rake teeth 2, and then the weight of the rake teeth 2 can be changed;

[0060] The single chip microcomputer 18 and the speed sensor 20 can be customized or selected according to actual needs;

[0061] The two clamping transmission modules each include a group of annular driving belts 12, two driving rollers 14 rotatably connected to a frame 13, and a tensioning frame 15 slidably connected to the frame 13; a group of tensioning springs 16 are installed between the tensioning frame 15 and the frame 13; a tensioning roller 17 is rotatably connected between the inner surfaces of the tensioning frame 15; the two driving rollers 14 and the tensioning roller 17 are both drivingly connected to the annular driving belts 12; the output shaft end of the transmission motor 3 is fixedly connected to a driving roller 14 on a clamping transmission module; the annular driving belts 12 on the two clamping transmission modules are staggered.

[0062] Before the test operation of the rake shaft 1 is carried out, the rake shaft 1 is installed between the two clamping transmission modules and fits with the annular drive belts 12 in the two clamping transmission modules. When the balance test operation of the rake shaft 1 and the rake teeth 2 is carried out, the annular drive belt 12 in the clamping transmission module connected to the transmission motor 3 is actively rotated, and the annular drive belt 12 in the clamping transmission module not connected to the transmission motor 3 is driven to rotate. After the annular drive belt 12 rotates, it drives the rake shaft 1 to rotate at a set speed.

[0063] Two measuring pieces arranged vertically at 90 degrees, the measuring pieces are used to test the radial runout of the rake shaft 1;

[0064] The measuring part includes a limit ring 21 installed on the frame 13, a detection rod 22 slidably connected to the limit ring 21, a monitoring head is installed at the end of the detection rod 22, a universal ball 23 is embedded in the monitoring head, the universal ball 23 is in contact with the rake shaft 1, and limit springs 24 are sleeved on the detection rod 22 and at positions corresponding to both sides of the limit ring 21. A ranging probe 25 arranged opposite to the detection rod 22 is installed on the frame 13, and the data end of the ranging probe 25 is connected to the data of the single-chip microcomputer 18, and the axis of the detection rod 22 is perpendicular to the axis of the rake shaft 1.

[0065] When the rake shaft 1 is limited by the two clamping transmission modules, under the action of the limit spring 24, the universal ball 23 on the detection rod 22 is tightly fitted with the rake shaft 1. When the universal ball 23 is tightly fitted with the rake shaft 1, the single chip microcomputer 18 controls the two distance measuring probes 25 to automatically calibrate to zero;

[0066] When the rake shaft 1 is rotated by the annular driving belt 12 and the rake shaft 1 has radial runout, the universal ball 23 drives the detection rod 22 to move. After the detection rod 22 moves, the feedback data of the distance measuring probe 25 is changed. The single chip microcomputer 18 obtains the data feedback of the distance measuring probe 25, thereby measuring the radial runout value of the rake shaft 1 when it rotates, and then quickly measures the balance data of the rake teeth 2.

[0067] Two linear drive modules 4, both of which are transmission-connected to a test frame 5;

[0068] The linear drive module 4 includes a drive motor mounted on the frame 13 , and a transmission screw is fixedly mounted on the output shaft end of the drive motor, and the transmission screw is transmission-connected to a test frame 5 at a corresponding position.

[0069] The inner wall of the test frame 5 is rotatably connected with a driven rotating ring 6, and the axis of the transmission screw is parallel to the axis of the driven rotating ring 6;

[0070] A counterweight frame 7 is provided on the inner side of the driven rotating ring 6;

[0071] A positioning magnetic block is installed on the inner wall of the driven rotating ring 6 and directly opposite to the counterweight frame 7 , and the positioning magnetic block is magnetically matched with the counterweight frame 7 .

[0072] When in use, by setting the positioning magnetic block, in the non-weight-counter test mode, the counterweight frame 7 is magnetically attracted to the driven rotating ring 6 and the position of the counterweight frame 7 on the driven rotating ring 6 is limited;

[0073] A magnetic block 8 is installed on the bottom surface of the counterweight frame 7, a group of T-shaped slide bars 32 are slidably connected between the counterweight frame 7 and the driven rotating ring 6, an adjusting screw rod 9 is rotatably connected to the inner wall of the counterweight frame 7, a counterweight block 10 is transmission-connected to the adjusting screw rod 9, a vibration sensor 11 is installed on the counterweight block 10, and a guide module for driving the adjusting screw rod 9 to rotate is installed on the test frame 5;

[0074] The guide module includes a transmission ring 26 rotatably connected to the test frame 5, the transmission ring 26 is rotatably sleeved on the driven rotating ring 6, and an active bevel gear ring 27 and a passive bevel gear ring 28 are respectively installed on the transmission ring 26. A motor 29 is installed on the test frame 5, and the motor 29 has an encoder connected to the data of the single-chip computer 18. A driving gear 30 is installed on the output shaft end of the motor 29, and the driving gear 30 is transmission-connected to the passive gear ring 28. The inner wall of the driven rotating ring 6 is rotatably connected to a guide shaft rod 31, and a driven bevel gear is fixedly installed on the top end of the guide shaft rod 31. The driven bevel gear is transmission-connected to the active bevel gear ring 27, and the adjusting screw rod 9 is driven by the guide shaft rod 31.

[0075] When the static balance test of the rake teeth 2 is performed, the counterweight frame 7 is magnetically attracted to the positioning magnetic block as a whole, and the magnetic block 8 is not connected to the rake shaft 1, and then the counterweight operation is not performed on the rake teeth 2;

[0076] In the non-weighted mode, the rake shaft 1 rotates at a set speed, and after the rake shaft 1 rotates, the static balance test of the rake teeth 2 is then performed;

[0077] When it is necessary to perform a dynamic balance test on the rake teeth 2, the rake shaft 1 rotates at a set speed, the counterweight frame 7 is separated from the positioning magnetic block, the magnetic block 8 is magnetically attracted to the rake shaft 1 as a whole, and the counterweight weight of the counterweight block 10 on the rake teeth 2 is adjusted by setting the position of the counterweight blocks 10 in the two counterweight frames 7, and the positions of the two test frames 5 are adjusted respectively by setting the two linear drive modules 4, and the positions of the two test frames 5 are limited by the positions, so as to adjust the counterweight positions of the two counterweight frames 7 on the rake teeth 2 respectively;

[0078] After the above state adjustment is completed, the rake shaft 1 rotates at a set speed, and then the counterweight dynamic balance test of the rake teeth 2 is performed;

[0079] During the dynamic balance test, the counterweight weight and counterweight position of the rake teeth 2 can be adjusted independently, thereby satisfying different test parameters during the test of the rake teeth 2, thereby realizing multi-parameter testing of the rake teeth 2, so as to effectively improve the test accuracy during the dynamic balance test of the rake teeth 2;

[0080] During the dynamic balancing test, the driven rotating ring 6 rotates synchronously with the harrow shaft 1 at the same speed. At the same time, the speed measuring structure of the speed sensor 20 is set so that the rotation speed of the transmission ring 26 is the same as the rotation speed of the driven rotating ring 6 and the harrow shaft 1, thereby keeping the active bevel gear ring 27 and the driven bevel gear relatively still, thereby keeping the adjusting screw 9 still.

[0081] The adjusting screw rod 9 has a connecting groove fixedly provided inside with a top opening and is slidably connected to the guide shaft 31. The cross-sections of the connecting groove and the guide shaft 31 are both regular polygons, and the axes of the guide shaft 31 and the guide rod are perpendicular to the rotation axis of the driven rotating ring 6.

[0082] When in use, the regular polygonal cross section of the coupling groove and the guide shaft 31 is set, so that when the counterweight frame 7 moves with the runout of the rake shaft 1, the guide shaft 31 can continuously drive the adjusting screw 9, thereby effectively ensuring the test accuracy of the device and allowing the counterweight frame 7 to move freely during the test, and then perform a balance test.

[0083] Two symmetrically arranged supporting members are used for supporting the rake shaft 1 and radially monitoring the radial runout amplitude of the rake shaft 1 .

[0084] The lifting member includes a lifting arm 33, which is hinged to the frame 13. An arm adjustment push rod 34 is hinged between the lifting arm 33 and the frame 13. A lifting wheel 35 is rotatably connected to the lifting arm 33. A ring bag 36 is installed on the lifting wheel 35. The ring bag 36 fits well with the rake shaft 1. An air guide channel connected to the inner cavity of the ring bag 36 is fixed inside the lifting wheel 35. An air pressure probe 37 for monitoring the air pressure inside the air guide channel is installed at the axial position of the lifting wheel 35. The data end of the air pressure probe 37 is connected to the data of the single-chip computer 18.

[0085] When the rake shaft 1 and the rake teeth 2 need to be installed on the device, the lifting arm 33 is arranged at a set angle, thereby facilitating the rapid installation of the rake shaft 1 and the rake teeth 2 on the device;

[0086] After the rake shaft 1 is initially installed, the angles of the two lifting arms 33 are set so that the lifting wheels 35 can effectively support the rake shaft 1, and the rake shaft 1 is kept in a horizontal state when supported. After the rake shaft 1 is supported, the feedback value of the air pressure probe 37 is automatically zeroed. After the data of the air pressure probe 37 is zeroed, when the rake shaft 1 undergoes radial runout, the data of the two air pressure probes 37 are driven to change. By monitoring the feedback values ​​of the two air pressure probes 37, the balance of the rake shaft 1 and the rake teeth 2 can be assisted in judging.

[0087] The machine frame 13 further comprises a position limiting protective tube 38 installed on the frame 13 , wherein a protective groove with openings at both ends is fixedly provided inside the position limiting protective tube 38 , and the radius of the protective groove is 1.1 to 1.2 times the radius of the rake shaft 1 .

[0088] By providing the limiting protection tube 38 and the protection groove, the movable range of the rake shaft 1 is limited, thereby improving the safety of the rake shaft 1 during testing.

[0089] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for testing the dynamic and static balance of rake teeth of a rake dryer, comprising a rake shaft (1), a frame (13) and a plurality of groups of rake teeth (2) mounted on the rake shaft (1), characterized in that: Also includes: Two symmetrically arranged clamping transmission modules, a transmission gap for driving the rake shaft (1) is provided between the two clamping transmission modules, and a transmission motor (3) for driving the clamping transmission modules is installed on the frame (13); Two measuring pieces arranged vertically at 90 degrees, the measuring pieces being used to test the radial runout of the rake shaft (1); Two linear drive modules (4), both of which are connected to a test frame (5) in a transmission manner, the inner wall of the test frame (5) is rotatably connected to a driven rotating ring (6), a counterweight frame (7) is provided on the inner side of the driven rotating ring (6), a magnetic block (8) is installed on the bottom surface of the counterweight frame (7), a group of T-shaped sliding rods (32) are slidably connected between the counterweight frame (7) and the driven rotating ring (6), an adjusting screw rod (9) is rotatably connected to the inner wall of the counterweight frame (7), a counterweight block (10) is connected in a transmission manner to the adjusting screw rod (9), a vibration sensor (11) is installed on the counterweight block (10), and a guide module for driving the adjusting screw rod (9) to rotate is installed on the test frame (5); Two symmetrically arranged supporting members are used for supporting the rake shaft (1) and radially monitoring the radial runout amplitude of the rake shaft (1).

2. The dynamic and static balance test device for rake teeth of a rake dryer according to claim 1, characterized in that: The two clamping transmission modules each comprise a group of annular driving belts (12), two driving rollers (14) rotatably connected to a frame (13), and a tensioning frame (15) slidably connected to the frame (13); a group of tensioning springs (16) are installed between the tensioning frame (15) and the frame (13); a tensioning roller (17) is rotatably connected between the inner surfaces of the tensioning frame (15); the two driving rollers (14) and the tensioning roller (17) are both drivingly connected to the annular driving belts (12); the output shaft end of the transmission motor (3) is fixedly connected to the driving roller (14) on one of the clamping transmission modules; and the annular driving belts (12) on the two clamping transmission modules are staggered.

3. The dynamic and static balance test device for rake teeth of a rake dryer according to claim 1, characterized in that: The frame (13) is respectively mounted with a single-chip microcomputer (18) and a weight rack (19), a group of weights are stacked on the weight rack (19), and a speed sensor (20) arranged opposite to the rake shaft (1) is mounted on the frame (13), and a data end of the speed sensor (20) is data-connected to the single-chip microcomputer (18).

4. The dynamic and static balance test device for rake teeth of a rake dryer according to claim 3, characterized in that: The measuring moving part comprises a limit ring (21) mounted on a frame (13), a detection rod (22) slidably connected to the limit ring (21), a monitoring head mounted on the end of the detection rod (22), a universal ball (23) embedded in the monitoring head, the universal ball (23) being in contact with the rake shaft (1), limit springs (24) being sleeved on the detection rod (22) and at positions corresponding to both sides of the limit ring (21), a distance measuring probe (25) being mounted on the frame (13) and arranged opposite to the detection rod (22), a data end of the distance measuring probe (25) being data-connected to a single-chip computer (18), and an axis of the detection rod (22) being perpendicular to an axis of the rake shaft (1).

5. The device for testing the dynamic and static balance of rake teeth of a rake dryer according to claim 4, characterized in that: The guide module comprises a transmission ring (26) rotatably connected to the test frame (5), the transmission ring (26) being rotatably sleeved on the driven rotating ring (6), the transmission ring (26) being respectively mounted with an active bevel gear ring (27) and a passive bevel gear ring (28), the test frame (5) being mounted with a motor (29), the motor (29) being equipped with an encoder connected to data of a single-chip computer (18), a driving gear (30) being mounted on the output shaft end of the motor (29), the driving gear (30) being transmission-connected to the passive bevel gear ring (28), a guide shaft (31) being rotatably connected to the inner wall of the driven rotating ring (6), a driven bevel gear being fixedly mounted on the top end of the guide shaft (31), the driven bevel gear being transmission-connected to the active bevel gear ring (27), and the adjusting screw (9) being driven by the guide shaft (31).

6. The device for testing the dynamic and static balance of rake teeth of a rake dryer according to claim 5, characterized in that: The adjusting screw rod (9) is fixedly provided with a coupling groove with a top opening and slidably connected to the guide shaft rod (31). The cross-sections of the coupling groove and the guide shaft rod (31) are both regular polygons. The axes of the guide shaft rod (31) and the guide rod are perpendicular to the rotation axis of the driven rotating ring (6).

7. The device for testing the dynamic and static balance of rake teeth of a rake dryer according to claim 1, characterized in that: The lifting member comprises a lifting arm (33), the lifting arm (33) being hinged to the frame (13), an arm adjustment push rod (34) being hinged between the lifting arm (33) and the frame (13), a lifting wheel (35) being rotatably connected to the lifting arm (33), an annular bag (36) being mounted on the lifting wheel (35), the annular bag (36) being adapted to fit the rake shaft (1), an air guide passage being fixedly opened inside the lifting wheel (35) and communicating with the inner cavity of the annular bag (36), an air pressure probe (37) for monitoring the air pressure inside the air guide passage being mounted at the axial position of the lifting wheel (35), a data end of the air pressure probe (37) being data-connected to the single-chip computer (18).

8. The device for testing the dynamic and static balance of rake teeth of a rake dryer according to claim 1, characterized in that: It also includes a position limiting protective tube (38) mounted on the frame (13), wherein a protective groove with two ends open is fixedly provided inside the position limiting protective tube (38), and the radius of the protective groove is 1.1 to 1.2 times the radius of the rake shaft (1).

9. The device for testing the dynamic and static balance of rake teeth of a rake dryer according to claim 1, characterized in that: The linear drive module (4) comprises a drive motor mounted on a frame (13), a transmission screw being fixedly mounted on an output shaft end of the drive motor, the transmission screw being in transmission connection with a test frame (5) at a corresponding position, and an axis of the transmission screw being parallel to an axis of a driven rotating ring (6).

10. The device for testing the dynamic and static balance of rake teeth of a rake dryer according to claim 1, characterized in that: A positioning magnetic block is installed on the inner wall of the driven rotating ring (6) and directly opposite to the counterweight frame (7), and the positioning magnetic block is magnetically matched with the counterweight frame (7).

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