A hydraulic real-time load simulation device

Abstract

The present invention discloses a hydraulic real-time load simulation device, wherein an assembly hole and an adjustment port are provided on the circumference of an outer cylinder body; a pressure sensor is installed in the assembly hole on the circumference of the outer cylinder body; a left end cover extends into an opening at one end of the outer cylinder body and is fixed to the outer cylinder body; a right end cover extends into an opening at the other end of the outer cylinder body and is fixed to the outer cylinder body; an inner cylinder body is located in the outer cylinder body and is slidably matched with the outer cylinder body, and an axial through hole is provided on the inner cylinder body; one end of a spring abuts against the inner cylinder body, and the other end of the spring abuts against the through hole, and the other end of the limit rod abuts against the through hole, and the other end of the limit rod abuts against the orifice of the oil inlet hole under the tension of the spring, and the limit rod abuts against the inner cylinder body. The present invention can simulate different clutch load pressure output characteristics, and verify the function and performance of the hydraulic valve body system assembly.

Description

Technical Field

[0001] The invention patent belongs to the field of real-time load simulation testing of electromechanical products. More specifically, the invention relates to a hydraulic real-time load simulation device, especially for the development, benchmarking and other test verification of hydraulic valve body assemblies. Background Art

[0002] In the existing hydraulic system test process, it is necessary to test the function and performance of the hydraulic valve assembly. During the test, it is necessary to simulate different load amounts through a real-time load device to verify the function and performance of the hydraulic system under different load conditions to achieve the test purpose.

[0003] The existing test equipment has the following technical problems:

[0004] When testing the hydraulic valve system, it is often necessary to install a hydraulic clutch to provide the load pressure for the simulated experiment in order to test the function and performance of the hydraulic valve system. However, the product clutch is often developed synchronously with the hydraulic valve system. When the hydraulic valve system is tested, the product clutch has not been fully developed and cannot be provided as a real-time load device. Therefore, in order to solve this problem, it is urgent to develop a hydraulic real-time load simulation device to simulate the clutch. Summary of the invention

[0005] The object of the present invention is to provide a hydraulic real-time load simulation device, which can simulate different clutch load pressure output characteristics and verify the function and performance of the hydraulic valve body system assembly.

[0006] The technical solution to achieve the above purpose is as follows:

[0007] A hydraulic real-time load simulation device, comprising:

[0008] An outer cylinder body is hollow and has openings at both ends, and an assembly hole and an adjustment port are arranged on the peripheral surface of the outer cylinder body;

[0009] A pressure sensor, the pressure sensor is installed in a mounting hole on the peripheral surface of the outer cylinder body;

[0010] A left end cover, the left end cover extends into an opening at one end of the outer cylinder body and is fixed to the outer cylinder body, and the left end cover is provided with an oil inlet hole penetrating through the axial end surface of the left end cover;

[0011] A right end cover, the right end cover extends into the opening at the other end of the outer cylinder body and is fixed to the outer cylinder body;

[0012] An inner cylinder body, the inner cylinder body is located in the outer cylinder body and slidably cooperates with the outer cylinder body, and an axial through hole is provided on the inner cylinder body;

[0013] Spring, one end of the spring abuts against the inner cylinder body, and the other end of the spring fits with the right end cover;

[0014] A limit rod, one end of which passes through a through hole provided on the inner cylinder body and is slidably matched with the through hole, and the other end of the limit rod is matched with the orifice of the oil inlet hole under the tension of the spring, so that the limit rod and the inner cylinder body form abutment;

[0015] A hydraulic medium accommodating chamber is formed between the outer cylinder body and the left end cover, the limiting rod and the inner cylinder body, and the pressure sensor and the regulating port correspond to the hydraulic medium accommodating chamber.

[0016] The real-time load simulation device of the present invention solves this problem well. The advantages of the real-time load simulation device of the present invention are as follows:

[0017] 1) The structure of the present invention can replace the clutch in the hydraulic valve assembly test and simulate the characteristic output of the actual clutch, and can be adjusted according to different clutch characteristics;

[0018] 2) The present invention prevents the physical clutch from being used for too long and causing the friction performance to change;

[0019] 3) The present invention solves the problem of effective testing when there is no physical clutch or the clutch is immature during the research and development stage;

[0020] 4) The present invention has multiple adjustment modes

[0021] 5) The present invention has real-time adjustment characteristics

[0022] 6) The comprehensive cost of the present invention is lower than that of the actual clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of a hydraulic real-time load simulation device of the present invention.

[0025] Markings in the attached drawings:

[0026] Oil pipe joint 1, left end cover 2, oil inlet hole 2a, outer cylinder body 3, pressure sensor 4, limit rod 5, guide rod 5a, limit part 5b, step 5c, inner cylinder body 6, cylinder body 6a, spring 7, right end cover 8, guide part 8a, fixed connection part 8b, rotary drive component 9, adjustment port 10, hydraulic medium accommodating chamber 11. DETAILED DESCRIPTION

[0027] The hydraulic medium mentioned in the present invention is described by taking hydraulic oil as an example. Figure 1 The present invention will be described.

[0028] A hydraulic real-time load simulation device of the present invention comprises an outer cylinder 3 with openings at both ends and being hollow, a pressure sensor 4, a left end cover 2, a right end cover 8, an inner cylinder 6, a spring 7, and a limit rod 5. The outer cylinder 3 is provided with an assembly hole and an adjustment port 10 on its circumference. The pressure sensor 4 is installed in the assembly hole on the circumference of the outer cylinder 3. The pressure sensor 4 is used to feedback and correct the oil filling amount in real time to realize closed-loop adjustment of the load and control the size of the load in real time. The linear adjustment characteristics of the oil filling amount, combined with the buffering and rapid reset of the spring 7, make the present invention very easy to implement in manufacturing and very economical in use cost.

[0029] The left end cover 2 extends into the opening at one end of the outer cylinder body 3 and is fixed to the outer cylinder body 3. The left end cover 2 is provided with an oil inlet hole 2a that passes through the axial end surface of the left end cover 2; the right end cover 8 extends into the opening at the other end of the outer cylinder body 3 and is fixed to the outer cylinder body 3; the inner cylinder body 6 is located in the outer cylinder body 3 and is slidably matched with the outer cylinder body 3, and an axial through hole is provided on the inner cylinder body 6; one end of the spring 7 is against the inner cylinder body 6, and the other end of the spring 7 is matched with the right end cover 8.

[0030] One end of the limit rod 5 passes through the through hole set on the inner cylinder body 6 and slides with the through hole. Under the tension of the spring 7, the other end of the limit rod 5 is matched with the orifice of the oil inlet hole 2a, and the limit rod 5 and the inner cylinder body 6 form abutment; a hydraulic medium accommodating chamber 11 is formed between the outer cylinder body 3 and the left end cover 2, the limit rod 5 and the inner cylinder body 6, and the pressure sensor 4 and the regulating port 10 correspond to the hydraulic medium accommodating chamber 11.

[0031] During the test, the output load force is changed by changing the amount of oil filling, and the pressure in the hydraulic medium containing cavity 11 is adjusted in real time through the regulating port 10 to achieve the result of simulating real-time pressure changes. This is achieved through real-time perception of the pressure sensor 4 and real-time control of the amount of oil filling and the amount of oil leakage through the regulating port 10. After the test, the oil can be drained through the regulating port 10 to reset the inner cylinder 6 and the limit rod 5 under the action of the spring 7.

[0032] The limiting rod 5 includes a guide rod 5a and a limiting portion 5b. The outer diameter of the guide rod 5a is smaller than the outer diameter of the limiting portion 5b. A step 5c is formed between the guide rod 5a and the limiting portion 5b. The step 5c abuts against the inner cylinder body 6. After the hydraulic medium enters from the oil inlet hole 2a, the hydraulic pressure of the hydraulic medium acts on the axial end surface of the other end of the limiting rod 5 to move the limiting rod 5. The limiting rod 5 overcomes the tension of the spring 7 to move the inner cylinder body 6. When one end of the limiting rod 5 abuts against the right end cover 8, the limiting rod 5 stops moving. The hydraulic pressure of the hydraulic medium entering the hydraulic medium accommodating cavity 11 acts on the inner cylinder body 6, so that the inner cylinder body 6 overcomes the tension of the spring 7 and continues to move.

[0033] The limit rod 5 of the above structure forms a seal on the oil inlet hole 2a when no hydraulic oil is injected. When the hydraulic oil initially enters the oil inlet hole 2a, under the pressure of the hydraulic oil, the hydraulic oil pushes the limit rod 5 to move so that the orifice of the oil inlet hole 2a is opened. At this time, the limit rod 5 overcomes the tension of the spring 7 and pushes the inner cylinder 6 to move. When the limit rod 5 stops moving and the inner cylinder 6 moves relative to the limit rod 5, the limit rod 5 guides the inner cylinder 6. When the spring 7 is compressed, the load is the compression force on the spring 7.

[0034] The end of the right end cover 8 facing the inner cylinder body 6 is provided with a guide component, and the end of the inner cylinder body 6 facing the right end cover 8 is provided with a cylinder 6a, which is sleeved on the guide component and has a clearance fit with the guide component. The guide component includes a guide portion 8a and a fixed connection portion 8b, the outer diameter of the guide portion 8a is smaller than the outer diameter of the fixed connection portion 8b, the guide portion 8a has a clearance fit with the cylinder 6a, and the fixed connection portion 8b is fixedly connected to the outer cylinder body 3 by a thread. A clearance space for the cylinder 6a to move is formed between the guide portion 8a and the outer cylinder body 3. The cylinder 6a surrounds the guide rod 5a and the spring 7.

[0035] The present embodiment further includes a rotation driving component 9, which is connected to the right end cover 8. The rotation driving component 9 is located outside the outer cylinder body 3. When the rotation driving component 9 rotates, it drives the right end cover 8 to move along the outer cylinder body 3 to adjust the tension of the spring 7. In the present embodiment, the right end cover 8 is threadedly connected to the outer cylinder body 3. By rotating the rotation driving component 9, the rotation driving component 9 can make the right end cover 8 move forward and backward relative to the outer cylinder body 3.

[0036] This embodiment further includes an oil pipe joint 1, which is connected to the oil inlet hole 2a. A portion of the oil pipe joint 1 is exposed outside the oil inlet hole 2a, and the oil pipe joint 1 is used to connect to the hydraulic oil injection mechanism.

[0037] The hydraulic oil enters the hydraulic medium containing cavity 11 after pushing the limit rod 5 through the oil pipe joint 1 and the oil inlet hole 2a. The continuous entry of the hydraulic oil overcomes the tension of the spring 7 and pushes the inner cylinder 6 to move toward the right end cover 8, so that the spring 7 force is converted into the pressure on the left end face of the inner cylinder 6 to simulate the load pressure. The pressure sensor 4 is used to detect whether the pressure in the hydraulic medium containing cavity 11 meets the test requirements. The load pressure is adjusted in real time by the amount of oil filling and oil leakage. At the same time, the load pressure can be fine-tuned by adjusting the position of the right end cover 8. After the test, the hydraulic oil in the hydraulic medium containing cavity 11 can be drained through the adjustment port 10 to reset the limit rod 5, the inner cylinder 6, and the spring 7.

[0038] The real-time load simulation device of the present invention has the characteristics of simple structure, light weight, strong versatility and low comprehensive cost, and can meet different test requirements. By changing the stiffness of the spring in its internal structure, it can be extended to simulate other loads.

[0039] Finally, it should be noted that the above embodiments are only preferred embodiments of the present invention to illustrate the technical solutions of the present invention, rather than limiting them, and certainly not limiting the patent scope of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention. In addition, the direct or indirect application of the technical solutions of the present invention in other related technical fields is also included in the patent protection scope of the present invention.

Claims

1. A hydraulic real-time load simulation device, characterized in that: include: An outer cylinder body (3) having openings at both ends and being hollow, wherein a mounting hole and an adjustment port (10) are provided on a peripheral surface of the outer cylinder body (3); A pressure sensor (4), the pressure sensor (4) being mounted in a mounting hole on the peripheral surface of the outer cylinder body (3); A left end cover (2), the left end cover (2) extending into an opening at one end of the outer cylinder body (3) and being fixed to the outer cylinder body (3), the left end cover (2) being provided with an oil inlet hole (2a) penetrating an axial end surface of the left end cover (2); A right end cover (8), the right end cover (8) extends into the opening at the other end of the outer cylinder body (3) and is fixed to the outer cylinder body (3); An inner cylinder body (6), the inner cylinder body (6) is located inside the outer cylinder body (3) and is slidably matched with the outer cylinder body (3), and an axial through hole is provided on the inner cylinder body (6); A spring (7), one end of the spring (7) abuts against the inner cylinder body (6), and the other end of the spring (7) cooperates with the right end cover (8); A limiting rod (5), one end of which passes through a through hole provided on the inner cylinder body (6) and is slidably engaged with the through hole, and under the tension of the spring (7), the other end of the limiting rod (5) is engaged with the opening of the oil inlet hole (2a), so that the limiting rod (5) and the inner cylinder body (6) form abutment; A hydraulic medium accommodating chamber (11) is formed between the outer cylinder body (3) and the left end cover (2), the limit rod (5) and the inner cylinder body (6), and the pressure sensor (4) and the regulating port (10) correspond to the hydraulic medium accommodating chamber (11).

2. A hydraulic real-time load simulation device according to claim 1, characterized in that: The invention also comprises a rotation driving component (9), the rotation driving component (9) being connected to the right end cover (8), the rotation driving component (9) being located outside the outer cylinder body (3), and the rotation driving component (9) driving the right end cover (8) to move along the outer cylinder body (3) when rotating to adjust the tension of the spring (7).

3. A hydraulic real-time load simulation device according to claim 1, characterized in that: It also includes an oil pipe joint (1), which is connected to the oil inlet hole (2a).

4. A hydraulic real-time load simulation device according to any one of claims 1 to 3, characterized in that: A guide component is provided at one end of the right end cover (8) facing the inner cylinder body (6), and a cylinder body (6a) is provided at one end of the inner cylinder body (6) facing the right end cover (8). The cylinder body (6a) is sleeved on the guide component and has a clearance fit with the guide component.

5. A hydraulic real-time load simulation device according to claim 4, characterized in that: The guide component comprises a guide portion (8a) and a fixed connection portion (8b); the outer diameter of the guide portion (8a) is smaller than the outer diameter of the fixed connection portion (8b); the guide portion (8a) and the cylinder body (6a) are clearance-matched; and the fixed connection portion (8b) and the outer cylinder body (3) are fixedly connected via threads.

6. A hydraulic real-time load simulation device according to claim 5, characterized in that: A clearance space for the cylinder body (6a) to move is formed between the guide portion (8a) and the outer cylinder body (3).

7. A hydraulic real-time load simulation device according to claim 1, characterized in that: The limiting rod (5) comprises a guide rod (5a) and a limiting portion (5b); the outer diameter of the guide rod (5a) is smaller than the outer diameter of the limiting portion (5b); a step (5c) is formed between the guide rod (5a) and the limiting portion (5b); and the step (5c) and the inner cylinder body (6) form an abutment.

8. A hydraulic real-time load simulation device according to claim 1 or 7, characterized in that: After the hydraulic medium enters from the oil inlet hole (2a), the hydraulic pressure of the hydraulic medium acts on the axial end surface of the other end of the limit rod (5) to move the limit rod (5), and the limit rod (5) overcomes the tension of the spring (7) to move the inner cylinder (6). When one end of the limit rod (5) abuts against the right end cover (8), the limit rod (5) stops moving, and the hydraulic pressure of the hydraulic medium entering the hydraulic medium accommodating chamber (11) acts on the inner cylinder (6), so that the inner cylinder (6) overcomes the tension of the spring (7) and continues to move.

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