Device and method for testing bearing clearance of high-pressure pump body

Abstract

The invention discloses a high-pressure pump body bearing clearance testing device and method, and the device comprises a support, the support is provided with at least one group of clearance testing assemblies, and each clearance testing assembly comprises a detection module, a first load module, a second load module, a third load module, a drive module, and a measurement pedestal. The measuring base is used for placing a workpiece to be detected; the detection module is used for carrying out gap detection on a to-be-detected workpiece; the first load module is arranged on the support, the second load module is arranged on the first load module, the first load module is arranged on the support, the third load module is located below the measuring base and used for fixing a workpiece to be detected, and the driving module is used for driving the workpiece to be detected to rotate. Through measurement of the bearing clearance value, the interference magnitude can be detected, and various failure problems caused by too small or too large interference magnitude are avoided.

Description

Technical Field

[0001] The invention relates to the technical field of high-pressure pump body installation, and in particular to a high-pressure pump body bearing clearance testing device and method. Background Art

[0002] In the existing automobile parts assembly production line, especially in the installation of high-pressure pump bodies, the bearing is installed on the shaft, generally using a press, hydraulic press, screw press or other equipment to install the bearing, because the bearing cannot be knocked, otherwise it will damage the bearing and the shaft. The quality of the bearing installation will affect the accuracy, life and performance of the bearing.

[0003] When the inner ring of the bearing is tightly matched with the shaft, and the outer ring is loosely matched with the bearing seat hole, the bearing can be pressed onto the shaft with a press machine during installation, and then the shaft connected with the bearing is installed into the bearing seat hole. When pressing, a soft metal assembly sleeve is placed on the end face of the inner ring of the bearing. The assembly sleeve is made of copper or soft steel. The inner diameter of the assembly sleeve should be slightly larger than the diameter of the shaft neck, and the outer diameter should be slightly smaller than the bearing inner ring rib to avoid pressing on the retainer. When the outer ring of the bearing is tightly matched with the bearing seat hole, and the inner ring is loosely matched with the shaft, the bearing can be pressed into the bearing seat hole first. At this time, the outer diameter of the assembly sleeve should be slightly smaller than the diameter of the seat hole. If the bearing ring is tightly matched with the shaft and the seat hole, the indoor ring and outer ring should be pressed into the shaft and seat hole at the same time. The structure of the assembly sleeve should be able to press the end faces of the inner ring and outer ring of the bearing at the same time.

[0004] In order to achieve strict positioning and rotation requirements for gear matching, the high-speed rolling bearing of the high-pressure pump body needs to adopt an interference fit with the shaft and the bearing seat hole. When the interference of the bearing is too small, the bearing will creep and fail. When the interference of the bearing is too large, the workpiece will be scratched when cold-pressed by a hydraulic press. To improve the assembly quality, it is necessary to strictly control the assembly of key bearings and monitor their interference. However, there is currently no special equipment to monitor the interference, resulting in various failure problems caused by too small or too large interference. Summary of the invention

[0005] To solve the above problems, the present invention provides a high-pressure pump body bearing clearance testing device and method. By measuring the bearing clearance value, the interference amount can be detected to avoid various failure problems caused by too small or too large interference amount.

[0006] To achieve the above object, the technical solution adopted by the present invention is: a high-pressure pump body bearing clearance test device, including a bracket, on which at least one set of clearance test components is arranged, and the clearance test components include a detection module, a first load module, a second load module, a third load module, a drive module, and a measurement base;

[0007] The measuring base is used to place the workpiece to be detected; the detection module is arranged on the second load module, and the detection module is used to perform gap detection on the workpiece to be detected; the second load module is arranged on the first load module, and the second load module is used to move the detection module in the Z-axis direction; the first load module is arranged on the bracket, and the first load module is used to move the second load module in the Z-axis direction; the third load module is located below the measuring base and is used to fix the workpiece to be detected, and the driving module is used to drive the workpiece to be detected to rotate;

[0008] The detection module, the first load module, the second load module, the third load module, and the driving module are electrically connected to a control device, respectively.

[0009] As a preferred technical solution of the present invention: the first load module includes a first support frame, a first motor is arranged above the first support frame, the output end of the first motor is connected to the first screw, a first screw nut is arranged on the first screw, and the first screw nut is connected to the second load module.

[0010] As a preferred technical solution of the present invention: the first motor is connected to the first lead screw via a planetary reducer, and a torque sensor is provided between the planetary reducer and the first lead screw.

[0011] As a preferred technical solution of the present invention: the second load module includes a second support frame, which is connected to the first screw nut; a second lifting rail is provided on the first support frame, and the second support frame is slidably connected to the second lifting rail; a second motor is provided on the second support frame; a second screw is provided on the second support frame, which is connected to the second motor, and a second screw nut is provided on the second screw; the second screw nut is connected to the detection module.

[0012] As a preferred technical solution of the present invention: a first position sensor is arranged on the first support frame, and a first sensing plate matched with the first position sensor is arranged on the second support frame.

[0013] As a preferred technical solution of the present invention: the detection module includes a third support frame, a height sensor is arranged above the third support frame, a pump body pin shaft mounting plate is arranged above the first support frame, a clamping sleeve is arranged above the pump body pin shaft mounting plate, a measuring clamping seat is arranged below the first support frame, and a spring and a thrust ball bearing are arranged on the clamping sleeve.

[0014] As a preferred technical solution of the present invention: the third load module includes a guide shaft mounting plate, the guide shaft mounting plate is connected to the lifting cylinder mounting plate through the guide shaft, the lifting cylinder is arranged on the lifting cylinder mounting plate, and the output end of the lifting cylinder is connected to the telescopic shaft through a sliding plate; a driving module is arranged on the sliding plate, the driving module includes a third motor, and the third motor is connected to the sliding plate through a third motor seat; a driven wheel is arranged on the sliding plate, the driven wheel is connected to the telescopic shaft, and the output end of the third motor is connected to the driving wheel; the driving wheel and the driven wheel are connected through a synchronous belt.

[0015] As a preferred technical solution of the present invention: the clearance test assembly has two groups, namely a camshaft clearance test assembly and a bearing clearance test assembly.

[0016] The present invention has the following beneficial effects:

[0017] By measuring the bearing clearance value, the interference fit can be detected to avoid various failure problems caused by too small or too large interference fit.

[0018] To achieve the above purpose, the technical solution adopted by the present invention is: a high-pressure pump body bearing clearance testing method: using a high-pressure pump body bearing clearance testing device described in any of the above technical solutions, comprising the following steps:

[0019] Step 1: Place the pump body and tapered roller bearing to be tested on the measuring base respectively;

[0020] Step 2: starting the gap test component;

[0021] Step 3: The first load module works, driving the detection module to a set position;

[0022] Step 4: the first load module stops; the second load module works to drive the detection module to a set position;

[0023] Step 5: The second load module stops, and the third load module works to drive the driving module to a set position;

[0024] Step 6: The third load module stops, and the drive module starts to drive the pump body and tapered roller bearing to be tested to rotate;

[0025] Step 7: The detection module measures the height value L1 between the camshaft side and the flange end, and measures the height value L2 between the bearing side cover and the bearing end;

[0026] Step 8: The control device obtains the bearing clearance value by calculating the difference between L1 and L2;

[0027] Step nine: the driving module stops, the third load module retracts, the second load module retracts, and the first load module retracts.

[0028] The present invention has the following beneficial effects:

[0029] The bearing clearance value measurement process of the present invention is simple, does not occupy a lot of labor, and improves work efficiency. By measuring the bearing clearance value, the interference can be detected to avoid various failure problems caused by too small or too large interference. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0031] Figure 2 for Figure 1 The main view of

[0032] Figure 3 for Figure 1 Left view of

[0033] Figure 4 for Figure 1 Bottom view of

[0034] Figure 5 It is a schematic diagram of the overall structure of the camshaft clearance measurement component;

[0035] Figure 6 for Figure 5 The main view of

[0036] Figure 7 for Figure 5 Left view of

[0037] Figure 8 for Figure 5 A top view of

[0038] Fig. 9 This is a schematic diagram of the overall structure of the bearing clearance measurement component;

[0039] Fig.10 for Fig. 9 The main view of

[0040] Fig.11 for Fig. 9 Left view of

[0041] Fig.12 for Fig. 9 A top view of

[0042] Fig.13 is a schematic diagram of the overall structure of the third load module;

[0043] Fig.14 for Fig.13The main view;

[0044] Fig.15 for Fig.13 Left view of

[0045] Fig.16 for Fig.13 Top view

[0046] Fig.17 It is the schematic diagram of the control device;

[0047] Fig.18 This is a flow chart of Embodiment 2 of the present invention.

[0048] Figure 1-Figure 18 1. bracket; 2. gap test assembly; 3. detection module; 4. first load module; 5. second load module; 6. third load module; 7. drive module; 8. measuring base; 9. control device; 10. first support frame; 11. first motor; 12. first lead screw; 13. second support frame; 14. planetary reducer; 15. torque sensor; 16. second lifting rail; 17. second motor; 18. second motor mounting seat; 19. second lead screw; 20. third support frame; 21. first position sensor; 22. first induction plate; 23. limit bolt mounting plate; 24. limit bolt; 25. height sensor; 26. pump body pin shaft mounting Mounting plate; 27. Clamping sleeve; 28. Measuring clamping seat; 29. ​​Spring; 30. Thrust ball bearing; 31. Second position sensor; 32. Second induction plate; 33. Guide shaft mounting plate; 34. Guide shaft; 35. Lifting cylinder mounting plate; 36. Lifting cylinder; 37. Sliding plate; 38. Driven wheel; 39. Driving wheel; 40. Third motor; 41. Synchronous belt; 42. Third motor seat; 43. Camshaft clearance measuring assembly; 44. Bearing clearance measuring assembly; 45. Pump body; 46. Tapered roller bearing; 47. Partition; 48. Telescopic shaft; 49. Third lifting slide rail; 50. Material box; 51 Observation window; 52. Three-color lamp; 53. Iron material box. DETAILED DESCRIPTION

[0049] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0050] Embodiment 1

[0051] like Figure 1-Figure 4As shown, the present invention provides a high-pressure pump body bearing clearance testing device including a bracket 1, on which at least one set of clearance testing components 2 is arranged, and the clearance testing components 2 include a detection module 3, a first load module 4, a second load module 5, a third load module 6, a drive module 7, and a measuring base 8; the measuring base 8 is used to place a workpiece to be detected, the detection module 3 is arranged on the second load module 5, and the detection module 3 is used to perform clearance detection on the workpiece to be detected; the second load module 5 is arranged on the first load module 4, and the second load module 5 is used to move the detection module 3 in the Z-axis direction; the first load module 4 is arranged on the bracket 1, and the first load module 4 is used to move the second load module 5 in the Z-axis direction; the third load module 6 is located below the measuring base 8, and is used to fix the workpiece to be detected, and the drive module 7 is used to drive the workpiece to be detected to rotate. The detection module 3, the first load module 4, the second load module 5, the third load module 6, and the drive module 7 are electrically connected to the control device 9 respectively; the workpiece to be detected is placed on the measuring base 8, and the first load module 4 drives the second load module 5 to move to the top of the workpiece to be detected. At the same time, after the first load module 4 applies pressure to the workpiece to be detected, the second load module 5 drives the detection module 3 to the specified position. After the second load module 5 completes the action, the third load module 6 works to apply pressure under the workpiece to be detected. The drive module 7 drives the workpiece to be detected to rotate, and the detection module 3 measures the gap of the workpiece to be detected, and transmits the detected value to the control device 9. Fig.17 As shown, the control device 9 includes a processor and a memory, is installed with a bearing clearance detection program, and can receive user data. For ease of use, a material box 50, a viewing window 51, a three-color lamp 52, and an iron material box 53 are arranged on the bracket 1.

[0052] like Figure 5-Figure 16 As shown, a partition 47 is provided on the bracket 1, and a first load module 4 is provided on the partition 47. The first load module 4 includes a first support frame 10, and a first motor 11 is provided above the first support frame 10. The output end of the first motor 11 is connected to the first lead screw 12, and a first lead screw nut is provided on the first lead screw 12, and the first lead screw nut is connected to the second support frame 13. In this embodiment, the first motor 11 is preferably a servo motor, which is connected to the first lead screw 12 through a planetary reducer 14. In order to facilitate the determination of the position of the second load module 5, the planetary reducer 14 is connected to the first lead screw 12 through a torque sensor 15;

[0053] The second load module 5 includes a second support frame 13 connected to the first lead screw nut, a second lifting rail 16 is arranged on the first support frame 10, and the second support frame 13 is slidably connected to the second lifting rail 16; a second motor 17 is arranged on the second support frame 13, and the second motor 17 is arranged on the second support frame 13 through a second motor mounting seat 18. A second lead screw 19 is arranged on the second support frame 13, and the second lead screw 19 is connected to the second motor 17, and the second motor 17 is preferably a stepping motor. The second lead screw 19 is connected to the third support frame 20 through a second lead screw nut, and a third lifting rail 49 is arranged on the second support frame 13, and the third support frame 20 is slidably connected to the third lifting rail 49. In order to make the position of the measurement module more accurate, a first position sensor 21 is arranged on the first support frame 10, and a first induction plate 22 matched with the first position sensor 21 is arranged on the second support frame 13. In order to ensure the accurate position of the detection module, a limit bolt mounting plate 13 is provided below the second support frame 13 , and a limit bolt 24 is provided on the limit bolt mounting plate 24 , which cooperates with the third support frame 20 .

[0054] The detection module includes a third support frame 20, a height sensor 25 is arranged above the third support frame 20, a pump body pin shaft mounting plate 26 is arranged above the first support frame 10, a compression sleeve 27 is arranged above the pump body pin shaft mounting plate 26, a measurement compression seat 28 is arranged below the first support frame 10, and a spring 29 and a thrust ball bearing 30 are arranged on the compression sleeve 27. In order to make the position of the measurement module more accurate, a second position sensor 31 is arranged on the second support frame 13, and a second induction plate 32 matched with the second position sensor 31 is arranged on the third support frame 20.

[0055] The third load module 6 includes a guide shaft mounting plate 33 arranged below the partition 47, the guide shaft mounting plate 33 is connected to the lifting cylinder mounting plate 35 through the guide shaft 34, the lifting cylinder 36 is arranged on the lifting cylinder mounting plate 35, and the output end of the lifting cylinder 36 is connected to the telescopic shaft 48 through the sliding plate 37; a driven wheel 38 is arranged on the sliding plate 37, the driven wheel 38 is connected to the telescopic shaft 48, and the driving wheel 39 is connected to the output end of the third motor 40; the third motor 40 is preferably a stepping motor. The driving wheel 39 is connected to the driven wheel 38 through a synchronous belt 41, and the third motor 40 is connected to the sliding plate 37 through a third motor seat 42, and the sliding plate 37 is arranged on the guide shaft 34.

[0056] In order to facilitate the measurement work, two sets of clearance test assemblies 2 are arranged on the partition 47, and the two sets of clearance test assemblies 2 are respectively a camshaft clearance test assembly 43 for measuring the height between the camshaft side and the flange end, and a bearing clearance test assembly 44 for measuring the height between the bearing side cover and the bearing end.

[0057] The working principle of this specific implementation is: place the pump body and tapered roller bearing 46 to be tested on the measuring base 8 of the camshaft clearance test assembly 43 and the bearing clearance test assembly 44 respectively, place the sleeve on the camshaft side, and start the camshaft clearance test assembly 43 and the bearing clearance test assembly 44.

[0058] The first motor 11 of the camshaft clearance test assembly 43 operates, driving the first lead screw 12 to rotate, thereby driving the second support frame 13 to move along the Z-axis direction. The second load module 5 and the detection module 3 move along the Z-axis direction. When the first position sensor 21 detects that the specified position range has been reached through the first sensing plate 22 and the torque sensor 15 has reached the specified torque, the first load module 4 stops working. The second motor 17 of the second load module 5 works, driving the detection module 3 to move along the Z-axis direction by driving the second lead screw 19; after the second position sensor 31 detects the second sensing plate 32, the second load module 5 stops working. After the second load module 5 stops working, the third load module 6 works, and the lifting cylinder drives the sliding plate 37 and the telescopic shaft to move upward in the Z-axis direction, and stops after contacting the other side of the camshaft; the third motor 40 works, driving the telescopic shaft 48 and the other side of the camshaft to rotate through the synchronous belt 41, and the height sensor 25 detects the height L1 of the camshaft side and the flange end. Similarly, the bearing clearance test assembly 44 measures the height L2 of the bearing side cover and the bearing end. The control device 9 obtains the bearing clearance value by subtracting L1 from L2, and the bearing clearance detection work is completed. By measuring the bearing clearance value, the interference can be detected to avoid various failure problems caused by too small or too large interference.

[0059] Embodiment 2

[0060] like Fig.18 As shown, the present invention also provides a high-pressure pump body bearing clearance testing method, which, in combination with the high-pressure pump body bearing clearance testing device described in the above embodiment 1, comprises the following steps:

[0061] Step 1: Place the pump body and tapered roller bearing 46 to be tested on the measuring base 8 respectively; when there is only one set of clearance test assembly 2, place the pump body 45 and tapered roller bearing 46 to be tested respectively;

[0062] Step 2: Start the gap test component 2;

[0063] Step 3: The first load module 4 works; drives the detection module 3 to the set position; the first load module 4 determines the set position through the first position sensor 21 and the torque sensor 15. If the set position is not reached, the first load module 4 continues to work. If the set position is reached, step 4 is performed;

[0064] Step 4: The first load module 4 stops; the second load module 5 works to drive the detection module to the set position; the second load module 5 determines the set position through the second position sensor 31. If the set position is not reached, the second load module 5 continues to work. If the set position is reached, step 5 is performed;

[0065] Step 5: The second load module 5 stops, and the third load module 6 works to drive the driving module 7 to the set position; if the telescopic shaft 48 of the third load module 6 cannot reach the set position, the third load module 6 continues to work, and if it reaches the set position, proceed to step 6;

[0066] Step 6: The third load module 6 stops, and the driving module 7 starts to drive the pump body 45 and the tapered roller bearing 46 to be inspected to rotate;

[0067] Step 7: The detection module 3 measures the height value L1 between the camshaft side and the flange end, and measures the height value L2 between the bearing side cover and the bearing end;

[0068] Step 8: The control device 9 obtains the bearing clearance value by calculating the difference between L1 and L2;

[0069] Step nine: the driving module 7 stops, the third load module 6 retreats, the second load module 5 retreats, and the first load module 4 retreats; the work is finished.

[0070] The bearing clearance value measurement process of the present invention is simple and does not occupy a large amount of labor. While improving work efficiency, it solves the problem of too small or too large interference in the interference fit between the high-speed bearing, the shaft and the bearing seat hole, avoiding various failure problems caused by this.

[0071] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A high-pressure pump bearing clearance testing device, comprising a bracket (1), characterized in that: At least one set of gap test components (2) is arranged on the bracket (1), and the gap test components (2) include a detection module (3), a first load module (4), a second load module (5), a third load module (6), a drive module (7), and a measurement base (8); The measuring base (8) is used for placing the workpiece to be detected; the detection module (3) is arranged on the second load module (5), and the detection module (3) is used for performing gap detection on the workpiece to be detected; the second load module (5) is arranged on the first load module (4), and the second load module (5) is used for moving the detection module (3) in the Z-axis direction; the first load module (4) is arranged on the bracket (1), and the first load module (4) is used for moving the second load module (5) in the Z-axis direction; the third load module (6) is located below the measuring base (8) and is used for fixing the workpiece to be detected, and the driving module (7) is used for driving the workpiece to be detected to rotate; The detection module (3), the first load module (4), the second load module (5), the third load module (6), and the drive module (7) are electrically connected to a control device (9) respectively.

2. A high-pressure pump bearing clearance testing device according to claim 1, characterized in that: The first load module (4) comprises a first support frame (10), a first motor (11) is arranged above the first support frame (10), an output end of the first motor (11) is connected to a first lead screw (12), a first lead screw nut is arranged on the first lead screw (12), and the first lead screw nut is connected to the second load module (5).

3. A high-pressure pump bearing clearance testing device according to claim 2, characterized in that: The first motor (11) is connected to the first lead screw (12) via a planetary reducer (14), and a torque sensor (15) is provided between the planetary reducer (14) and the first lead screw (12).

4. A high-pressure pump bearing clearance testing device according to claim 1, characterized in that: The second load module (5) comprises a second support frame (13), the second support frame (13) is connected to the first lead screw nut; the first support frame (10) is provided with a second lifting rail (16), the second support frame (13) is slidably connected to the second lifting rail (16); the second support frame (13) is provided with a second motor (17); the second support frame (13) is provided with a second lead screw (19), the second lead screw (19) is connected to the second motor (17), and the second lead screw (19) is provided with a second lead screw nut; the second lead screw nut is connected to the detection module (3).

5. A high-pressure pump bearing clearance testing device according to claim 4, characterized in that: The first support frame (10) is provided with a first position sensor (21), and the second support frame (13) is provided with a first sensing plate (22) that matches the first position sensor (21).

6. A high-pressure pump bearing clearance testing device according to claim 1, characterized in that: The detection module (3) comprises a third support frame (20), a height sensor (25) is arranged above the third support frame (20), a pump body pin shaft mounting plate (26) is arranged above the first support frame (10), a clamping sleeve (27) is arranged above the pump body pin shaft mounting plate (26), a measuring clamping seat (28) is arranged below the first support frame (10), and a spring (29) and a thrust ball bearing (30) are arranged on the clamping sleeve (27).

7. A high-pressure pump bearing clearance testing device according to claim 1, characterized in that: The third load module (6) comprises a guide shaft mounting plate (33), the guide shaft mounting plate (33) is connected to a lifting cylinder mounting plate (35) through a guide shaft (34), a lifting cylinder (36) is arranged on the lifting cylinder mounting plate (35), and an output end of the lifting cylinder (36) is connected to a telescopic shaft (48) through a sliding plate (37); a driving module (7) is arranged on the sliding plate (37), and the driving module (7) comprises a third motor (40), and the third motor (40) is connected to the sliding plate (37) through a third motor seat (42); a driven wheel (38) is arranged on the sliding plate (37), and the driven wheel (38) is connected to the telescopic shaft (48), and the output end of the third motor (40) is connected to a driving wheel (39); the driving wheel (39) and the driven wheel (38) are connected through a synchronous belt (41).

8. A high-pressure pump bearing clearance testing device according to claim 1, characterized in that: The clearance test assembly (2) comprises two groups, namely a camshaft clearance test assembly (43) and a bearing clearance test assembly (44).

9. A method for testing the bearing clearance of a high-pressure pump body, characterized in that: Using a high-pressure pump bearing clearance testing device as described in any one of claims 1 to 9, comprising the following steps: Step 1: placing the pump body (45) and the tapered roller bearing (46) to be tested on the measuring base (8) respectively; Step 2: starting the gap test component (2); Step 3: The first load module (4) works to drive the detection module (3) to a set position; Step 4: the first load module (4) stops, and the second load module (5) starts to work, driving the detection module (3) to a set position; Step 5: the second load module (5) stops, and the third load module (6) starts to work, driving the driving module (7) to a set position; Step 6: the third load module (6) stops, and the drive module (7) starts to work, driving the pump body (45) and the tapered roller bearing (46) to be tested to rotate; Step 7: The detection module (3) measures the height value L1 between the camshaft side and the flange end, and measures the height value L2 between the bearing side cover and the bearing end; Step 8: The control device (9) obtains the bearing clearance value by calculating the difference between L1 and L2; Step nine: the driving module (7) stops, the third load module (6) retracts, the second load module (5) retracts, and the first load module (4) retracts.

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