Automobile water pump impeller dynamic balance detection and correction equipment

Abstract

The invention discloses an automobile water pump impeller dynamic balance detection and correction device, and particularly relates to the field of water pump impeller detection. The automobile water pump impeller dynamic balance detection and correction device comprises a detection and correction frame installed on a detection machine tool, and a main fixing piece for fixing an impeller center hole is arranged on one side of the top of the detection and correction frame; an auxiliary fixing piece for limiting the end part of the impeller is arranged on the other side of the top of the detection correction frame; the auxiliary fixing piece comprises an air cylinder fixedly installed above the detection correction frame, the extending end of the air cylinder is rotationally provided with a connector through a bearing, and the end of the connector is provided with an abutting ring; in the stretching process of the air cylinder, the air pump is synchronously controlled to work, seamless contact between the detection numerical control shaft and the center hole of the impeller is ensured through inflation expansion of the air bag, and the detection and correction stability is improved by pressing and limiting the end of the impeller through the abutting ring; different pipeline valves can be controlled in stages, impurities on the top wall of the detection correction frame are blown away firstly, then the surface of the impeller is cleaned, and the risk of missing detection caused by the fact that the impeller is covered by pollutants is avoided.

Description

Technical Field

[0001] This invention relates to the field of water pump impeller testing technology, and more specifically, to a dynamic balance testing and correction device for an automotive water pump impeller. Background Technology

[0002] As a key component of the car cooling system, the dynamic balance of the car water pump impeller is crucial to the normal operation of the car engine. If the impeller is not dynamically balanced, it will generate greater vibration and noise when rotating at high speed, which will not only affect driving comfort, but also accelerate the wear of components such as water pump bearings, shorten their service life, and even cause more serious mechanical failures.

[0003] Dust and impurities can accumulate on impellers during processing, transportation, or storage. These contaminants can mask surface defects such as cracks, scratches, and corrosion, leading to distorted visual or non-destructive testing results. Existing impeller testing and calibration equipment lacks the ability to clean the impeller surface, making it impossible to avoid the risk of missed detections due to large particulate contaminants masking the impeller.

[0004] During the impeller installation stage, the impeller's center hole is often clamped above the CNC inspection shaft before direct inspection and calibration. However, for open or semi-open impellers, the former has low rigidity and the latter has medium rigidity, and the open end is prone to deformation. This poses a risk of axial displacement during the inspection and calibration process. It is impossible to improve the stability of the inspection and calibration process by combining "seamless limiting" at the impeller's center hole with limiting at the impeller end.

[0005] To address the aforementioned technical shortcomings, a solution is provided. Summary of the Invention

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a dynamic balance testing and correction device for automobile water pump impeller.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A dynamic balancing testing and calibration device for an automotive water pump impeller includes a testing and calibration frame mounted on a testing machine tool. One side of the top of the testing and calibration frame is provided with a main fixing component for fixing the center hole of the impeller, and the other side of the top of the testing and calibration frame is provided with an auxiliary fixing component for limiting the end of the impeller.

[0009] The auxiliary fixing component includes a cylinder fixedly installed above the testing and calibration frame. The extended end of the cylinder is provided with a connector via a bearing. The end of the connector is provided with a pressure ring. Multiple sets of threaded rods are provided on the outer circumference of the connector and are rotatably connected to the connector. A cleaning component for cleaning the testing and calibration frame table and impeller is provided below the cylinder.

[0010] The cleaning assembly includes a mounting plate fixedly connected to the protruding end of the cylinder. An air pump is mounted on the side wall of the mounting plate near the cylinder. An air vent is mounted on the other side wall of the mounting plate. The output end of the air pump is connected to the air vent via a pipe. A dust removal pipe perpendicular to the air vent is connected below the air vent. A cleaning pipe is also connected to the output end of the air vent. The output end of the cleaning pipe is provided with a cleaning ring fixedly connected to the outer circumferential wall of the connector.

[0011] Furthermore, control valves are fixedly installed on the inlet walls of both the cleaning pipe and the dust removal pipe.

[0012] Furthermore, the output ends of most of the cleaning rings are positioned facing one side of the impeller, while the output end of the dust removal tube is positioned obliquely to the lower left.

[0013] Furthermore, the main fixing component includes a detection CNC shaft fixedly connected to the detection and calibration frame. The inner wall of the detection CNC shaft is provided with an air storage groove and a limiting groove. A connecting groove is provided on the inner wall of the detection CNC shaft between the air storage groove and the limiting groove. A piston plate is slidably provided in the air storage groove. A pressing column is slidably provided in the limiting groove. A limiting column connecting the piston plate and the pressing column is slidably provided in the connecting groove.

[0014] Furthermore, the detection CNC axis has multiple sets of ventilation slots on the outer wall of the circumference of the air storage tank, and an airbag is connected to the outer wall of the detection CNC axis on the outer side of the multiple sets of ventilation slots.

[0015] Furthermore, multiple sets of thrust springs are provided on the side wall of the piston plate opposite to the gas storage tank.

[0016] Furthermore, the detection and calibration frame has a dust collection port on its top wall below the detection CNC axis, and a dust collection box that slides with the detection CNC axis is provided below the dust collection port.

[0017] The working method of this automotive water pump impeller dynamic balancing testing and correction equipment includes the following stages:

[0018] Impeller installation, center hole limiting and end limiting stages: After the impeller is installed, the extension end of the control cylinder extends, the connector first contacts the pressing column, pushes the limiting column, and inflates the air bag to ensure seamless contact between the detection CNC shaft and the impeller center hole. The extension end of the cylinder continues to extend, and the end of the pressure ring presses and limits the impeller end, which works in conjunction with the seamless limiting at the center hole.

[0019] Dust removal and cleaning stage: When the cylinder extends, the air pump is controlled to work simultaneously. First, the impurities on the top wall of the detection and calibration frame are blown into the dust collection box through the dust collection port. Then, the impeller surface is cleaned to avoid the risk of missed detection due to the cover-up of pollutants.

[0020] Dynamic balancing test and correction stage: The impeller is dynamically balanced and corrected using the dynamic balancing test device equipped on the testing machine tool.

[0021] The technical effects and advantages of this invention are as follows:

[0022] 1. This invention controls the extension of the cylinder's protruding end. The cylinder gradually extends towards one side of the impeller, and the connector first contacts the pressing column and pushes the limiting column towards the air storage tank. The limiting column pushes the piston plate to one side, and the piston plate discharges the gas in the air storage tank through the vent pipe, causing the airbag to inflate and expand, ensuring seamless contact between the detection CNC shaft and the impeller's center hole. As the cylinder's protruding end continues to extend, the end of the pressure ring presses and limits the end of the impeller. The seamless limitation of the impeller from the center hole and the end pressure limitation work together to improve the stability of the impeller detection and calibration process.

[0023] 2. In this invention, during the cylinder extension process, the air pump is simultaneously controlled to operate. The gas generated by the air pump is transported to the ventilation pipe through a pipeline. During the displacement of the pressure ring from its initial position to just contacting the detection CNC axis, the control valve above the dust removal long pipe is opened. The gas enters the dust removal long pipe through the ventilation pipe, blowing impurities on the top wall of the detection calibration frame into the dust collection box through the dust collection port. During the displacement of the pressure ring fitting onto the detection CNC axis and contacting the end of the impeller, the control valve above the dust removal long pipe is closed, and the control valve above the cleaning pipe is opened. The gas is blown out through the cleaning ring with a gradually decreasing diameter to clean the surface of the impeller, directly avoiding the risk of missed detection caused by contaminants covering the impeller. Attached Figure Description

[0024] Figure 1 This is a perspective view of the overall structure of the present invention.

[0025] Figure 2 This is a perspective view of the external structure of the auxiliary fastener in this invention.

[0026] Figure 3 A three-dimensional view showing the connection between the cleaning pipe, dust removal pipe, and ventilation pipe in the auxiliary fixing components.

[0027] Figure 4 This is a perspective view of the external structure of the main fixing component in this invention.

[0028] Figure 5 This is a cross-sectional view of the internal structure of the main fixing member in this invention.

[0029] Figure 6 This is an enlarged view of the internal structure of the gas storage tank in this invention.

[0030] Figure 7 This is a front view of the overall structure of the present invention.

[0031] The attached diagram is labeled as follows: 1. Inspection and calibration frame; 2. Main fixing component; 3. Auxiliary fixing component; 4. Dust collection port; 5. Dust collection box; 7. Cylinder; 8. Inspection CNC axis; 21. Air bag; 22. Limiting groove; 23. Pressing column; 24. Limiting column; 25. Piston plate; 26. Air storage tank; 27. Thrust spring; 28. Ventilation groove; 31. Connector; 32. Pressure ring; 33. Threaded rod; 34. Mounting plate; 35. Air pump; 36. Cleaning ring; 37. Cleaning pipe; 38. Dust removal long pipe; 39. Ventilation pipe. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] Example 1: Please refer to Figures 1-7 As shown, the following solutions can be used to address the problem in existing technologies where impeller surface contaminants mask impeller surface defects, such as cracks, scratches, and corrosion, leading to distorted visual inspection or non-destructive testing results.

[0034] This embodiment provides a dynamic balancing test and calibration device for an automobile water pump impeller, including a test and calibration frame 1 mounted on a test machine tool. One side of the top of the test and calibration frame 1 is provided with a main fixing member 2 for fixing the center hole of the impeller, and the other side of the top of the test and calibration frame 1 is provided with an auxiliary fixing member 3 for limiting the end of the impeller.

[0035] The auxiliary fixing component 3 includes a cylinder 7 fixedly installed above the testing and calibration frame 1. The extended end of the cylinder 7 is provided with a connector 31 via a bearing. The end of the connector 31 is provided with a pressure ring 32. The outer circumferential wall of the connector 31 is provided with multiple sets of threaded rods 33 that are rotatably connected to the connector 31. A cleaning component for cleaning the table surface and impeller of the testing and calibration frame 1 is provided below the cylinder 7.

[0036] The cleaning assembly includes a mounting plate 34 fixedly connected to the protruding end of the cylinder 7. An air pump 35 is mounted on the side wall of the mounting plate 34 near the cylinder 7. An air pipe 39 is mounted on the other side wall of the mounting plate 34. The output end of the air pump 35 is connected to the air pipe 39 through a pipe. A dust removal long pipe 38 perpendicular to the air pipe 39 is connected below the air pipe 39. The output end of the air pipe 39 is also connected to a cleaning pipe 37. The output end of the cleaning pipe 37 is provided with a cleaning ring 36 fixedly connected to the outer circumferential wall of the connector 31.

[0037] The air pump 35 is a prior art device that can inflate the air pipe 39; and the airflow generated by the air pump 35 is delivered to the dust removal tube 38 and the cleaning tube 37 through the air pipe 39 respectively. The dust removal tube 38 can clean the surface of the test calibration frame 1, and the cleaning ring 36 can blow the impeller surface to remove dust and impurities and improve the test accuracy.

[0038] Control valves are fixedly installed on the pipe walls at the inlet ends of both the cleaning pipe 37 and the dust removal long pipe 38; the airflow interruption and flow rate of the cleaning pipe 37 and the dust removal long pipe 38 are controlled by the control valves respectively, and the cleaning intensity and range are flexibly adjusted according to actual needs.

[0039] Most of the cleaning rings 36 have their output ends facing one side of the impeller, while the output end of the dust removal tube 38 is set at an angle to the lower left. This allows the cleaning rings 36 to more effectively blow the impeller surface, and the dust removal tube 38 to better clean debris and other impurities on the test calibration frame 1.

[0040] This embodiment mainly includes a dust removal stage and an impeller surface cleaning stage, as follows:

[0041] Dust removal stage: During the extension of cylinder 7, the air pump 35 is controlled to work synchronously. The gas generated by air pump 35 is transported to the ventilation pipe 39 through the pipeline. During the displacement of the pressure ring 32 from the initial position to the point where it just contacts the detection CNC axis 8, the control valve above the dust removal tube 38 is opened. The gas enters the dust removal tube 38 through the ventilation pipe 39 and blows the impurities on the top wall of the detection calibration frame 1 into the dust collection box 5 through the dust collection port 4, thus completing the initial dust removal work.

[0042] Impeller surface cleaning stage: During the displacement when the mortise ring is fitted into the detection CNC shaft 8 and contacts the end of the impeller, the control valve above the dust removal long pipe 38 is closed, and the control valve above the cleaning pipe 37 is opened. Gas is blown out through the cleaning ring 36 with a gradually decreasing diameter to clean the surface of the impeller, directly avoiding the risk of missed detection caused by contaminants covering the impeller.

[0043] Example 2: Please refer to Figure 1 , Figures 4-6 As shown, for open impellers or semi-open impellers, the former has low stiffness and the latter has medium stiffness. The open end is prone to deformation, which poses a risk of axial displacement during the inspection and correction process. The following solutions can be used to address this issue.

[0044] The main fixing component 2 includes a detection CNC shaft 8 fixedly connected to the detection and calibration frame 1. An air storage groove 26 and a limiting groove 22 are provided on the inner wall of the detection CNC shaft 8. A connecting groove is provided on the inner wall of the detection CNC shaft 8 between the air storage groove 26 and the limiting groove 22. A piston plate 25 is slidably provided in the air storage groove 26. A pressing column 23 is slidably provided in the limiting groove 22. A limiting column 24 connecting the piston plate 25 and the pressing column 23 is slidably provided in the connecting groove.

[0045] The detection CNC axis 8 is located on the outer wall of the circumference of the air storage tank 26 and has multiple sets of ventilation slots 28. An air bag 21 is connected to the outer wall of the multiple sets of ventilation slots 28.

[0046] Multiple sets of thrust springs 27 are provided on the side wall of the piston plate 25 opposite to the air storage tank 26;

[0047] The top wall of the inspection and calibration frame 1, located below the inspection CNC axis 8, has a dust collection port 4, and a dust collection box 5 is located below the dust collection port 4.

[0048] This embodiment mainly includes the triggering stage of the main fixing member 2 and the limiting stage of the auxiliary fixing member 3, as follows:

[0049] Triggering stage of main fixing component 2: The extension end of the control cylinder 7 extends, and the cylinder 7 gradually extends to the side of the impeller. The connector 31 first contacts the pressing column 23 in the main fixing component 2 and pushes the limiting column 24 towards the air storage tank 26. The limiting column 24 pushes the piston plate 25 to one side. The piston plate 25 compresses the gas in the air storage tank 26. The gas enters the air bag 21 through the ventilation groove 28, causing the air bag 21 to inflate and expand, ensuring seamless contact between the detection CNC shaft 8 and the center hole of the impeller, and achieving stable fixation of the center hole of the impeller.

[0050] Auxiliary fixing component 3 limiting stage: As the cylinder 7 continues to extend, the end of the pressure ring 32 presses and limits the end of the impeller, which works in conjunction with the main fixing component 2 to fix the center hole of the impeller, together improving the stability of the impeller detection and correction process.

[0051] It should be added that: by precisely limiting the movement and displacement of the piston plate 25 in the air storage tank 26, the amount of gas entering the airbag 21 is controlled from the source, and the capacity of the air storage tank 26 is reasonably designed to match the amount of gas required for the safe inflation of the airbag 21.

[0052] Working principle: When using this invention, firstly, insert the impeller with the end cap towards the detection CNC shaft 8, ensuring that the groove of the impeller is aligned with the protrusion of the detection CNC shaft 8; then, extend the extension end of the control cylinder 7, gradually extending the cylinder 7 towards one side of the impeller. The connector 31 first contacts the pressing column 23 and pushes the limiting column 24 towards the air storage tank 26. The limiting column 24 pushes the piston plate 25 to one side, and the piston plate 25 discharges the gas in the air storage tank 26 through the vent pipe 39, causing the air bag 21 to inflate and expand, ensuring seamless contact between the detection CNC shaft 8 and the center hole of the impeller; as the extension end of the cylinder 7 continues to extend, the end of the pressure ring 32 presses and limits the end of the impeller. The seamless limitation of the impeller from the center hole and the end pressure limitation work together to improve the stability of the impeller detection and calibration process;

[0053] During the extension of cylinder 7, the air pump 35 is controlled to work synchronously. The gas generated by air pump 35 is transported to the ventilation pipe 39 through the pipeline. During the displacement of the pressure ring 32 from the initial position to the point where it just contacts the detection CNC axis 8, the control valve above the dust removal long pipe 38 is opened. The gas enters the dust removal long pipe 38 through the ventilation pipe 39 and blows the impurities on the top wall of the detection calibration frame 1 into the dust collection box 5 through the dust collection port 4. During the displacement of the pressure ring when it is fitted into the detection CNC axis 8 and contacts the end of the impeller, the control valve above the dust removal long pipe 38 is closed and the control valve above the cleaning pipe 37 is opened. The gas is blown out through the cleaning ring 36 with a gradually decreasing diameter to clean the surface of the impeller and directly avoid the risk of missed detection caused by contaminants covering the impeller.

[0054] After the impeller is fixed and cleaned, the dynamic balance test device equipped on the testing machine is used to test the dynamic balance of the impeller. Based on the test results, the impeller is dynamically balanced by appropriate correction methods, such as adding or removing appropriate counterweights, until the impeller reaches the specified dynamic balance standard, thus completing the entire testing and correction process.

[0055] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A dynamic balancing and calibration device for an automotive water pump impeller, comprising a calibration frame (1) mounted on a testing machine tool, characterized in that, The top of the inspection and calibration frame (1) is provided with a main fixing member (2) for fixing the impeller center hole on one side, and an auxiliary fixing member (3) for limiting the impeller end on the other side of the top of the inspection and calibration frame (1). The auxiliary fixing component (3) includes a cylinder (7) fixedly installed above the testing and calibration frame (1). The extended end of the cylinder (7) is provided with a connector (31) through a bearing. The end of the connector (31) is provided with a pressure ring (32). The outer circumferential wall of the connector (31) is provided with multiple sets of threaded rods (33) that are rotatably connected to the connector (31). A cleaning component for cleaning the table surface and impeller of the testing and calibration frame (1) is provided below the cylinder (7). The cleaning assembly includes a mounting plate (34) fixedly connected to the extended end of the cylinder (7). An air pump (35) is mounted on the side wall of the mounting plate (34) near the cylinder (7). An air pipe (39) is mounted on the other side wall of the mounting plate (34). The output end of the air pump (35) is connected to the air pipe (39) through a pipe. A dust removal long pipe (38) perpendicular to the air pipe (39) is connected below the air pipe (39). A cleaning pipe (37) is also connected to the output end of the air pipe (39). A cleaning ring (36) is fixedly connected to the outer circumference of the connector (31) at the output end of the cleaning pipe (37).

2. The automotive water pump impeller dynamic balance testing and correction equipment according to claim 1, characterized in that: Control valves are fixedly installed on the inlet walls of both the cleaning pipe (37) and the dust removal pipe (38).

3. The automotive water pump impeller dynamic balancing testing and correction equipment according to claim 1, characterized in that: Most of the cleaning rings (36) have their output ends facing one side of the impeller, while the output end of the dust removal tube (38) is angled downward to the left.

4. The automotive water pump impeller dynamic balancing testing and correction equipment according to claim 1, characterized in that: The main fixing component (2) includes a detection CNC shaft (8) fixedly connected to the detection calibration frame (1). The inner wall of the detection CNC shaft (8) is provided with an air storage groove (26) and a limiting groove (22). The inner wall of the detection CNC shaft (8) between the air storage groove (26) and the limiting groove (22) is provided with a connecting groove. A piston plate (25) is slidably provided in the air storage groove (26). A pressing column (23) is slidably provided in the limiting groove (22). A limiting column (24) connecting the piston plate (25) and the pressing column (23) is slidably provided in the connecting groove.

5. The automotive water pump impeller dynamic balance testing and correction equipment according to claim 4, characterized in that: The detection CNC axis (8) has multiple sets of ventilation slots (28) on the outer wall of the circumference of the air storage tank (26), and an air bag (21) is connected to the outer wall of the detection CNC axis (8) on the outer side of the multiple sets of ventilation slots (28).

6. The automotive water pump impeller dynamic balancing testing and correction equipment according to claim 5, characterized in that: Multiple sets of thrust springs (27) are provided on the side wall opposite to the gas storage tank (26) of the piston plate (25).

7. The automotive water pump impeller dynamic balancing testing and correction equipment according to claim 6, characterized in that: The detection and calibration frame (1) has a dust collection port (4) on its top wall below the detection CNC axis (8), and a dust collection box (5) that slides with the detection CNC axis (8) is provided below the dust collection port (4).

8. A dynamic balancing testing and calibration device for an automotive water pump impeller according to any one of claims 1-7, characterized in that: The working method of this automotive water pump impeller dynamic balancing and calibration equipment includes the following stages: Impeller installation, center hole limiting and end limiting stage: After the impeller is installed, the extension end of the control cylinder (7) extends, the connector (31) first contacts the pressing column (23), pushes the limiting column (24), and makes the air bag (21) inflate to ensure seamless contact between the detection CNC shaft (8) and the impeller center hole. The extension end of the cylinder (7) continues to extend, and the end of the pressure ring (32) presses and limits the impeller end, which works in conjunction with the seamless limiting at the center hole. Dust removal and cleaning stage: When the cylinder (7) extends, the air pump (35) is controlled to work simultaneously. First, the impurities on the top wall of the detection calibration frame (1) are blown into the dust collection box (5) through the dust collection port (4). Then, the impeller surface is cleaned to avoid the risk of missed detection due to the cover of pollutants. Dynamic balancing test and correction stage: The impeller is dynamically balanced and corrected using the dynamic balancing test device equipped on the testing machine tool.

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