A comprehensive test bench for hydraulic pump station assembly components

Abstract

This invention discloses a comprehensive test bench for assembling hydraulic pump station components, including a test bench, a hydraulic cylinder fixedly mounted on the test bench, a fixed shell fixedly mounted on the test bench, and a sliding block slidably mounted on the fixed shell; it also includes a constant force load component, a gradual load component, and an impact load component; the constant force load component is used to apply a constant load to the hydraulic cylinder in the initial stage of the hydraulic cylinder's extension stroke; by setting the constant force load component, the gradual load component, and the impact load component, the stability of the hydraulic cylinder during the sliding process is tested. At the same time, the portability of the testing process is improved by passively switching between the various load components. When the gradual load component intervenes, the constant force load component is disengaged by disengaging the component, so as to ensure the integrity of the hydraulic cylinder gradually increasing the load from an empty load state under the action of the gradual load component, thereby achieving a more complete test of the hydraulic pump performance.

Description

Technical Field

[0001] This invention relates to the field of hydraulic testing technology, and more specifically to a comprehensive testing bench for hydraulic pump station assembly components. Background Technology

[0002] Hydraulic pumps are the core power components of hydraulic pump stations. Their key indicators, such as output flow rate, pressure build-up capacity, volumetric efficiency, and shock resistance, directly determine the working stability, response speed, and service life of the hydraulic system. Before the hydraulic pump leaves the factory, during the assembly, commissioning, and maintenance stages, load tests must be conducted to simulate load changes under actual working conditions.

[0003] Existing testing devices mostly use hydraulic cylinders as load actuators. The hydraulic cylinders load the output of the hydraulic pump and then test the performance of the hydraulic pump under load. However, most hydraulic cylinders in the testing devices can only provide a constant load and cannot simulate the complex working conditions such as load changes with stroke and load gradually increasing in actual working conditions. Therefore, it is difficult to truly reflect the working performance of the hydraulic pump under variable load conditions. Summary of the Invention

[0004] The purpose of this invention is to provide a comprehensive test bench for assembling hydraulic pump station components, so as to overcome the above-mentioned shortcomings in the prior art.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A comprehensive test bench for assembling hydraulic pump station components includes a test bench, a hydraulic cylinder fixedly mounted on the test bench, a fixed shell fixedly mounted on the test bench, and a sliding block slidably mounted on the fixed shell;

[0007] It also includes constant force load components, gradual load components, and impact load components;

[0008] The constant force load assembly is used to apply a constant load to the hydraulic cylinder during the initial stage of the hydraulic cylinder's extension stroke.

[0009] The gradual load assembly is used to apply a load to the hydraulic cylinder that gradually increases with the stroke after the hydraulic cylinder extends to a set position;

[0010] The impact load assembly is used to apply an impact load to the hydraulic cylinder during the retraction process.

[0011] The constant force load assembly includes a constant force spring, one end of which is fixedly connected to a fixed shell, and the other end is fixedly provided with a reciprocating plate. The fixed shell is provided with a guide groove, and the reciprocating plate is slidably disposed in the guide groove. The reciprocating plate is inserted into and engaged with a sliding block.

[0012] It also includes a disengagement component, which is used to disengage the reciprocating plate from the sliding block when the hydraulic cylinder changes from a constant force load to a gradual load.

[0013] Preferably, the disengagement component includes a slide rod slidably disposed on a slide block, a limit pin slidably disposed on the slide rod, a limit hole disposed on the reciprocating plate, and the limit pin and the limit hole being inserted into each other.

[0014] Preferably, a release spring is provided between the slide rod and the slide block, and the two ends of the release spring are fixedly connected to the slide rod and the slide block respectively.

[0015] Preferably, a locking spring is provided between the slide rod and the limiting pin, and the two ends of the locking spring are fixedly connected to the slide rod and the limiting pin, respectively.

[0016] Preferably, a roller is rotatably mounted on the slide rod, the roller abuts against the fixed shell, the fixed shell is provided with a groove, and the roller makes rolling contact with the groove wall.

[0017] Preferably, the gradient load assembly includes a load sleeve slidably connected to the fixed shell, the load sleeve abutting against the sliding block, and a load spring provided between the load sleeve and the fixed shell, with both ends of the load spring fixedly connected to the load sleeve and the fixed shell respectively.

[0018] Preferably, the impact load assembly includes a lifting rod slidably disposed on a fixed shell, a locking block fixedly disposed on the lifting rod, a locking groove disposed on the load sleeve, and the locking block engaging with the locking groove.

[0019] Preferably, a plurality of unlocking springs are provided between the lifting rod and the fixed shell, and the two ends of the unlocking springs are fixedly connected to the lifting rod and the fixed shell respectively.

[0020] Preferably, a second abutting block is fixedly provided on the lifting rod, and a first abutting block is fixedly provided on the sliding block. Both the first abutting block and the second abutting block are provided with inclined surfaces, and they abut against each other through the inclined surfaces.

[0021] Preferably, the limiting pin is provided with an inclined surface, and the inclined surface abuts against the reciprocating plate.

[0022] In the above technical solution, the comprehensive test bench for hydraulic pump station assembly components provided by the present invention has the following beneficial effects:

[0023] By setting up constant force load components, gradual load components, and impact load components, the stability of the hydraulic cylinder during the sliding process is tested. At the same time, the portability of the testing process is improved by passively switching between the various load components. When the gradual load component intervenes, the constant force load component is disengaged by the disengagement component to ensure the integrity of the hydraulic cylinder gradually increasing the load from an empty state under the action of the gradual load component, thus achieving a more complete test of the hydraulic pump performance.

[0024] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0025] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0028] Figure 2 This is a front view structural diagram provided for an embodiment of the present invention;

[0029] Figure 3 This is a front cross-sectional view of the fixing shell provided in an embodiment of the present invention;

[0030] Figure 4 Provided for embodiments of the present invention Figure 3 Enlarged view of point A in the image;

[0031] Figure 5 Provided for embodiments of the present invention Figure 3 Enlarged view of point B in the image;

[0032] Figure 6 This is a schematic diagram of the constant force load component structure provided in an embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of a detached component structure provided in an embodiment of the present invention;

[0034] Figure 8 The overall test piping diagram provided for embodiments of the present invention.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Test bench frame; 11. Motor; 12. Hydraulic pump; 13. Oil tank; 14. Pressure gauge; 15. Overflow valve block; 16. Hydraulic cylinder; 2. Fixed shell; 21. Guide groove; 22. Wheel groove; 3. Sliding block; 31. First abutment block; 4. Constant force spring; 41. Reciprocating plate; 42. Limiting hole; 5. Load sleeve; 51. Load spring; 52. Locking groove; 6. Slide rod; 61. Limiting pin; 62. Engaging spring; 63. Release spring; 64. Roller; 7. Lifting rod; 71. Locking block; 72. Second abutment block; 73. Unlocking spring. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0038] Please refer to 1-8. A comprehensive test bench for assembling hydraulic pump station components includes a test bench frame 1, a hydraulic cylinder 16 fixedly mounted on the test bench frame 1, a fixed housing 2 fixedly mounted on the test bench frame 1, and a sliding block 3 slidably mounted on the fixed housing 2; it also includes a constant force load component, a gradual load component, and an impact load component; the constant force load component is used to apply a constant load to the hydraulic cylinder 16 during the initial stage of its extension stroke; the gradual load component is used to apply a variable load to the hydraulic cylinder 16 after it has extended to a set position. The load gradually increases; the impact load assembly is used to apply an impact load to the hydraulic cylinder 16 during its retraction; the constant force load assembly includes a constant force spring 4, one end of which is fixedly connected to the fixed housing 2, and the other end is fixedly provided with a reciprocating plate 41. The fixed housing 2 is provided with a guide groove 21, and the reciprocating plate 41 is slidably disposed in the guide groove 21. The reciprocating plate 41 is inserted and engaged with a sliding block 3. By providing a sliding block 3 on the hydraulic cylinder 16, a disengagement assembly is also included, which is used to disengage the hydraulic cylinder 16 when it changes from a constant force load to a gradual load. The reciprocating plate 41 is disengaged from the sliding block 3. Through the insertion of the reciprocating plate 41 and the sliding block 3, the hydraulic cylinder 16 is subjected to the load of the constant force spring 4 when it extends. The output stability of the hydraulic pump 12 is determined by the extension and retraction stability of the hydraulic cylinder 16. At the same time, the reciprocating plate 41 is disengaged from the sliding block 3 by the disengagement component. After disengagement, the extension of the hydraulic cylinder 16 is not subjected to additional load. The gradually increasing load force is applied to the sliding of the hydraulic cylinder 16 from zero. When the load gradually increases, the hydraulic pump 12 drives the hydraulic cylinder 16 to extend, which simulates the stability of lifting. At the same time, when the hydraulic cylinder 16 is reset, i.e., retracted, the impact load component is passively triggered to simulate the stability of the hydraulic cylinder 16 when subjected to a sudden large additional load force. This is used to test the output capacity of the hydraulic pump 12 under the gradual load. After the impact load is applied, the impact load component will apply a gradually decreasing load force to the hydraulic cylinder 16 as it resets, which greatly improves the output stability test of the hydraulic pump 12 under various working conditions.

[0039] A limit pin 61 is slidably provided on the slide rod 6, and a limit hole 42 is provided on the reciprocating plate 41. The limit pin 61 and the limit hole 42 are inserted into each other. When the reciprocating plate 41 is inserted into the sliding block 3, the limit pin 61 is inserted into the limit hole 42, fixing the reciprocating plate 41 on the sliding block 3. At this time, when the hydraulic cylinder 16 extends, it pulls the reciprocating plate 41 to slide in the guide groove 21, pulling the constant force spring 4. The constant force spring 4 can then apply a constant load force to the sliding of the hydraulic cylinder 16, thereby realizing the detection of the stable output capability of the hydraulic pump 12 under constant load.

[0040] Specifically, a release spring 63 is provided between the slide rod 6 and the sliding block 3. The two ends of the release spring 63 are fixedly connected to the slide rod 6 and the sliding block 3 respectively. When the limit pin 61 is inserted into the limit hole 42, the release spring 63 is in a stretched state. Before the hydraulic cylinder 16 contacts the gradual load assembly, the release spring 63 pulls the slide rod 6 through the reset force, causing the slide rod 6 to slide with the limit pin 61. The limit pin 61 disengages from the limit hole 42. Under the action of the constant force spring 4, the reciprocating plate 41 resets and slides, disengaging from the sliding block 3, so that the hydraulic cylinder 16 is not subjected to additional load force. Subsequently, the hydraulic cylinder 16 contacts the gradual load assembly. As the hydraulic cylinder 16 slides, the additional load force on the hydraulic cylinder 16 increases from zero, so as to more comprehensively detect and observe the stability of the hydraulic cylinder 16 when the load on the hydraulic cylinder 16 gradually increases, thereby realizing the output stability of the hydraulic pump 12 under this working condition.

[0041] In a further embodiment of the present invention, a locking spring 62 is provided between the slide rod 6 and the limiting pin 61. The two ends of the locking spring 62 are fixedly connected to the slide rod 6 and the limiting pin 61, respectively. The limiting pin 61 is provided with an inclined surface, which abuts against the reciprocating plate 41. When the hydraulic cylinder 16 retracts and returns to its original position, the side wall of the guide groove 21 restricts the reciprocating plate 41. As the sliding block 3 slides, the inclined surface on the limiting pin 61 abuts against the reciprocating plate 41, and the locking spring 62 is compressed under the abutment action. When the limiting pin 61 is aligned with the limiting hole 42, the locking spring 62 resets, allowing the limiting pin 61 to engage with the limiting hole 42, thus completing the connection between the reciprocating plate 41 and the sliding block 3.

[0042] Furthermore, a roller 64 is rotatably mounted on the slide rod 6. The roller 64 abuts against the fixed housing 2. The fixed housing 2 is provided with a groove 22. The roller 64 rolls in contact with the groove wall of the groove 22. When the hydraulic cylinder 16 is subjected to a constant force load, the roller 64 abuts against the fixed housing 2 and rotates as the hydraulic cylinder 16 extends. Before the hydraulic cylinder 16 contacts the gradual load assembly, the roller 64 moves to the position of the groove 22. The release spring 63, which is in a stretched state, moves the roller 64 into the groove 22 through its restoring force. The slide rod 6 slides down and drives the limit pin 61 to move down, so that it disengages from the limit hole 42. Under the action of the constant force spring 4, the reciprocating plate 41 slides back and disengages from the sliding block 3, so that the hydraulic cylinder 16 is not subjected to additional load force before contacting the gradual load assembly. This allows the gradual load force on the hydraulic cylinder 16 to gradually increase from zero, improving the accuracy of detecting the output stability of the hydraulic pump 12 under this working condition.

[0043] Furthermore, the gradual load assembly includes a load sleeve 5 slidably connected to the fixed housing 2. The load sleeve 5 abuts against the sliding block 3. A load spring 51 is provided between the load sleeve 5 and the fixed housing 2. The two ends of the load spring 51 are fixedly connected to the load sleeve 5 and the fixed housing 2, respectively. The hydraulic cylinder 16 abuts against the load sleeve 5 and pushes the load sleeve 5, so that when the load spring 51 is compressed, the rebound force of the load spring 51 gradually increases with its own compression, applying a gradually increasing load force to the hydraulic cylinder 16. In this way, the stability of the hydraulic pump 12 is detected when the load gradually increases.

[0044] In a further embodiment of the present invention, the impact load assembly includes a lifting rod 7 slidably disposed on the fixed housing 2, a locking block 71 fixedly disposed on the lifting rod 7, and a locking groove 52 disposed on the load sleeve 5. The locking block 71 and the locking groove 52 are engaged. When the load sleeve 5 completes its sliding, the locking block 71 and the locking groove 52 engage, restricting the return sliding of the load sleeve 5. Subsequently, the hydraulic cylinder 16 retracts, and after retracting to a certain extent, the locking block 71 disengages from the locking groove 52, releasing the load spring 51. Through the return force of the load spring 51, the load sleeve 5 slides, completing the impact on the hydraulic cylinder 16. By impacting the hydraulic cylinder 16, the output stability of the hydraulic cylinder 16 when suddenly subjected to pressure is detected.

[0045] In the embodiment provided by the present invention, a plurality of unlocking springs 73 are provided between the lifting rod 7 and the fixed shell 2. The two ends of the unlocking springs 73 are fixedly connected to the lifting rod 7 and the fixed shell 2 respectively. A second abutting block 72 is fixedly provided on the lifting rod 7, and a first abutting block 31 is fixedly provided on the sliding block 3. Both the first abutting block 31 and the second abutting block 72 are provided with inclined surfaces, and they abut against each other through the inclined surfaces. Both sides of the first abutting block 31 and the second abutting block 72 are provided with inclined surfaces, so that when the hydraulic cylinder 16 slides out, it will not be affected by the first abutting block 72. The contact between the abutting block 31 and the second abutting block 72 obstructs the sliding block 3. Furthermore, when the hydraulic cylinder 16 slides, retracts, and resets, the first abutting block 31 and the second abutting block 72 abut against each other via the inclined surfaces, causing the lifting rod 7 to slide upward with the locking block 71. The locking block 71 disengages from the locking groove 52, releasing the load sleeve 5. Through the reset force of the load spring 51, the load sleeve 5 impacts the sliding block 3, applying an impact to the hydraulic cylinder 16, in order to test the output stability of the hydraulic pump 12 under this working condition.

[0046] The test bench frame 1 is equipped with a motor 11, an oil tank 13, a pressure gauge 14, an overflow valve block 15, and a hydraulic pump 12. The motor 11 of the test bench frame 1 is connected to the hydraulic pump 12, providing power to the hydraulic pump 12. The hydraulic pump 12 draws hydraulic oil from the oil tank 13, converting mechanical energy into hydraulic energy and outputting high-pressure oil. The high-pressure oil enters the test pipeline, and the pressure gauge 14 monitors the system working pressure in real time. The overflow valve block 15 regulates the system pressure and provides safety overflow protection. The high-pressure oil finally enters the rodless chamber of the hydraulic cylinder 16, pushing the piston rod of the hydraulic cylinder 16 to extend. The hydraulic cylinder 16 acts as a load actuator to perform a load test on the output performance of the hydraulic pump 12. The test principle is as follows: Figure 8 As shown, attached Figure 8 The testing principles and methods described herein are based on existing technologies and will not be elaborated upon further.

[0047] Working principle: When the hydraulic cylinder 16 slides out, the reciprocating plate 41 is inserted into the sliding block 3, and the limiting pin 61 is inserted into the limiting hole 42. At this time, the hydraulic cylinder 16 pushes the sliding block 3 to slide. Under the action of the constant force spring 4, the sliding block 3 is subjected to a constant load to detect the output stability of the hydraulic pump 12 under constant load. When the sliding block 3 slides to the position corresponding to the roller 64 and the wheel groove 22, under the action of the release spring 63, the roller 64 is in contact with the inner wall of the wheel groove 22, and the sliding rod 6 slides with the limiting pin 61. The limiting pin 61 engages with the limiting hole 42. After the reciprocating plate 41 loses its limit position, it disengages from the sliding block 3 under the action of the constant force spring 4. At this time, the hydraulic cylinder 16 is not subjected to additional load. Subsequently, the hydraulic cylinder 16 continues to slide and abuts against the load sleeve 5, while compressing the load spring 51. As the load spring 51 gradually compresses, the load force it applies to the hydraulic cylinder 16 gradually increases to detect the stability of the hydraulic pump 12 when the load force gradually increases from an unloaded state. Furthermore, when the load sleeve 5 slides to its maximum value, the locking groove 52 engages with the locking block 71, thus controlling the load. The load sleeve 5 is locked, and the hydraulic cylinder 16 begins to reset. After a certain distance during the reset process, the first abutment block 31 abuts against the second abutment block 72 via the inclined surface, compressing the unlocking spring 73 and causing the lifting rod 7 to move upward, thus completing the disengagement of the locking block 71 from the locking groove 52. Subsequently, under the action of the load spring 51, the load sleeve 5 slides, applying an impact load to the hydraulic cylinder 16 to test the stability of the hydraulic pump 12 under the impact load. After the impact, the load sleeve 5 continues to apply a load force to the hydraulic cylinder 16 under the action of the load spring 51. As cylinder 16 slides back and load spring 51 gradually rebounds, the load force gradually decreases. The stability of hydraulic pump 12 is tested when the load force gradually decreases. When hydraulic cylinder 16 completes its reset, reciprocating plate 41 is inserted into sliding block 3. During the insertion process, the retaining spring 62 is compressed by abutting against the inclined surface on limit pin 61, so that limit hole 42 is aligned with limit pin 61. The retaining spring 62 resets the limit pin 61 into limit hole 42, so that constant force load can be directly tested when hydraulic cylinder 16 extends next time.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A comprehensive test bench for assembling hydraulic pump station components, comprising a test bench frame (1), characterized in that, A hydraulic cylinder (16) is fixedly installed on the test bench frame (1), a fixed shell (2) is fixedly installed on the test bench frame (1), and a sliding block (3) is slidably installed on the fixed shell (2). It also includes constant force load components, gradual load components, and impact load components; The constant force load assembly is used to apply a constant load to the hydraulic cylinder (16) during the initial stage of the extension stroke of the hydraulic cylinder (16); The gradual load assembly is used to apply a load that gradually increases with the stroke to the hydraulic cylinder (16) after the hydraulic cylinder (16) extends to a set position; The impact load assembly is used to apply an impact load to the hydraulic cylinder (16) during the retraction process; The constant force load assembly includes a constant force spring (4), one end of which is fixedly connected to the fixed shell (2), and the other end is fixedly provided with a reciprocating plate (41). The fixed shell (2) is provided with a guide groove (21), and the reciprocating plate (41) is slidably disposed in the guide groove (21). The reciprocating plate (41) is inserted into the sliding block (3). It also includes a disengagement component, which is used to disengage the reciprocating plate (41) from the sliding block (3) when the hydraulic cylinder (16) changes from a constant force load to a gradual load.

2. The comprehensive test bench for assembling hydraulic pump station components according to claim 1, characterized in that, The disengagement assembly includes a slide rod (6) slidably disposed on a slide block (3), a limit pin (61) slidably disposed on the slide rod (6), and a limit hole (42) disposed on the reciprocating plate (41), wherein the limit pin (61) and the limit hole (42) are inserted into each other.

3. The comprehensive test bench for assembling hydraulic pump station components according to claim 2, characterized in that, A release spring (63) is provided between the slide rod (6) and the sliding block (3), and the two ends of the release spring (63) are fixedly connected to the slide rod (6) and the sliding block (3) respectively.

4. The comprehensive test bench for assembling hydraulic pump station components according to claim 2, characterized in that, A locking spring (62) is provided between the slide rod (6) and the limiting pin (61), and the two ends of the locking spring (62) are fixedly connected to the slide rod (6) and the limiting pin (61) respectively.

5. A comprehensive test bench for assembling hydraulic pump station components according to claim 2, characterized in that, A roller (64) is rotatably mounted on the slide rod (6). The roller (64) abuts against the fixed shell (2). The fixed shell (2) is provided with a wheel groove (22). The roller (64) rolls in contact with the groove wall of the wheel groove (22).

6. A comprehensive test bench for assembling hydraulic pump station components according to claim 1, characterized in that, The gradient load assembly includes a load sleeve (5) that is slidably connected to the fixed shell (2). The load sleeve (5) abuts against the sliding block (3). A load spring (51) is provided between the load sleeve (5) and the fixed shell (2). The two ends of the load spring (51) are fixedly connected to the load sleeve (5) and the fixed shell (2) respectively.

7. A comprehensive test bench for assembling hydraulic pump station components according to claim 6, characterized in that, The impact load assembly includes a lifting rod (7) that is slidably mounted on a fixed shell (2). A locking block (71) is fixedly mounted on the lifting rod (7). A locking groove (52) is provided on the load sleeve (5). The locking block (71) and the locking groove (52) are engaged.

8. A comprehensive test bench for assembling hydraulic pump station components according to claim 1, characterized in that, Multiple unlocking springs (73) are provided between the lifting rod (7) and the fixed shell (2), and the two ends of the unlocking springs (73) are fixedly connected to the lifting rod (7) and the fixed shell (2) respectively.

9. A comprehensive test bench for assembling hydraulic pump station components according to claim 7, characterized in that, A second abutting block (72) is fixedly provided on the lifting rod (7), and a first abutting block (31) is fixedly provided on the sliding block (3). Both the first abutting block (31) and the second abutting block (72) are provided with inclined surfaces, and they abut against each other through the inclined surfaces.

10. A comprehensive test bench for assembling hydraulic pump station components according to claim 2, characterized in that, The limiting pin (61) is provided with an inclined surface, and it abuts against the reciprocating plate (41) through the inclined surface.

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