Debugging system and method for external damping at cylinder end of oil damper

Abstract

The invention relates to an oil damper cylinder end external damping debugging system and method. The system comprises an oil damper cylinder end sealing assembly, a hydraulic system and an electronic control system. The oil damper cylinder end sealing assembly is arranged at one end of the hydraulic system; and the electronic control system is connected with the hydraulic system. Wherein the oil damper cylinder end sealing assembly is used for sealing the oil damper cylinder end; the hydraulic system provides pressure oil for the debugging system; the electronic control system is used for monitoring and controlling oil pressure and flow, calculating damping force and sending instruction signals to the hydraulic system. All the systems are matched with one another, so that accurate control over the flow, sealing of the cylinder end of the oil damper and damping performance detection can be achieved. The debugging process of the damping characteristic damping valve of the oil damper is optimized, the movement flexibility of equipment is improved, the time required for debugging the damping characteristic of the oil damper is remarkably shortened, and the operation efficiency of debugging the damping characteristic of the oil damper can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil pressure shock absorbers, and in particular to an oil pressure shock absorber cylinder end external damping debugging system and method. Background Art

[0002] At present, the existing damping debugging method of hydraulic shock absorber is to conduct bench test after manually adjusting the damping valve. If the damping characteristics are unqualified, the bench test machine needs to be stopped, and then the damping valve is manually adjusted again, and then the bench test is conducted until the damping characteristics of the hydraulic shock absorber are qualified. However, conventional bench test equipment is too bulky and it is difficult to move the equipment.

[0003] In view of the above problems, a Chinese patent with publication number CN109404366A discloses a hydraulic shock absorber damping piston debugging system, such as Figure 1 As shown, it includes a hydraulic cylinder and a damping piston debugging tooling; the hydraulic cylinder and the damping piston debugging tooling are connected through a reversing valve 1 and a reversing valve 2. The damping piston debugging tooling includes a sealing cover 1, a sealing cover 2 and an adjusting device; the damping piston is clamped between the sealing cover 1 and the sealing cover 2; the adjusting device includes at least one adjusting unit, which is arranged on the sealing cover 1 or the sealing cover 2, and corresponds to the regulating valve on the damping piston one to one to adjust the flow of the regulating valve. In the scheme disclosed in the patent, a hydraulic cylinder is used as the pressure source of the system, and pressure oil is provided to the damping piston debugging tooling in both directions by stretching or compressing the piston rod of the hydraulic cylinder, so that multiple regulating valves arranged in reverse on the damping piston can be adjusted, simulating the actual use environment of the damping piston. A two-position three-way hydraulic control valve is adopted to realize the automatic reversing of the system; a shuttle valve and a safety valve are designed to ensure the safety of the system.

[0004] Although the above patent can solve the relevant technical problems to a certain extent, the disclosed solution lacks the technical solution to generate the flow required for debugging the hydraulic shock absorber, and it is unable to generate the hydraulic shock absorber indicator diagram, and it is also unable to detect the magnitude of the hydraulic shock absorber damping force. Therefore, whether it can play a positive role in practical applications needs further discussion. Summary of the invention

[0005] In view of the above problems, the purpose of the present invention is to provide a hydraulic shock absorber cylinder end external damping debugging system and method, which optimizes the debugging process of the hydraulic shock absorber damping characteristic damping valve, increases the mobility of the equipment, and can significantly reduce the time required for the hydraulic shock absorber damping characteristic debugging, thereby greatly improving the operating efficiency of the hydraulic shock absorber damping characteristic debugging.

[0006] The technical solution adopted by the present invention is as follows:

[0007] The invention provides an external damping debugging system for a hydraulic shock absorber cylinder end, comprising a hydraulic shock absorber cylinder end sealing assembly, a hydraulic system and an electronic control system; the hydraulic shock absorber cylinder end sealing assembly is arranged at one end of the hydraulic system; the electronic control system is connected to the hydraulic system.

[0008] Furthermore, the oil pressure shock absorber cylinder end sealing assembly includes a cylinder port seal, a cylinder end oil channel seal, a sealing ring and a support frame; the cylinder port seal is threadedly connected to the upper port of the oil pressure shock absorber cylinder end; the oil pressure shock absorber cylinder end is fixed to the top of the support frame by bolts; the sealing ring is correspondingly arranged on the lower inner part of the oil pressure shock absorber cylinder end; the cylinder end oil channel seal is threadedly connected to the bottom inner part of the oil pressure shock absorber cylinder end, and its upper end presses the lower end face of the sealing ring to separate and seal the oil inlet chamber and the oil return chamber of the oil pressure shock absorber cylinder end.

[0009] Furthermore, the support frame is formed by welding steel pipes and is fixed to the ground by anchor bolts.

[0010] Furthermore, the hydraulic system includes a hydraulic pump station, a solenoid valve group, an oil inlet pipe, a joint and an oil return pipe; the hydraulic pump station provides pressure oil for the debugging system; the solenoid valve group is fixedly connected to the hydraulic pump station by bolts to accurately control the oil flow; one end of the oil inlet pipe and the oil return pipe are connected to the hydraulic pump station through the solenoid valve group; the other end of the oil inlet pipe is connected to the oil inlet chamber at the cylinder end of the oil pressure shock absorber through a joint; the other end of the oil return pipe is connected to the oil return chamber at the cylinder end of the oil pressure shock absorber through a joint.

[0011] Furthermore, movable wheels are respectively arranged around the bottom of the hydraulic pump station.

[0012] Furthermore, the movable wheel is a universal wheel.

[0013] Furthermore, the electronic control system includes a pressure transmitter, a flow transmitter, a programmable controller, a host computer and a data transmission line; the programmable controller is connected to the host computer through the data transmission line; the solenoid valve group is connected to the programmable controller through the data transmission line; two pressure transmitters are provided, and the two pressure transmitters and the flow transmitter are respectively connected to the programmable controller through the data transmission line; one of the pressure transmitters is connected to the middle of the oil inlet pipe through a tee, and the other pressure transmitter is connected to the middle of the oil return pipe through a tee; both ends of the flow transmitter are respectively connected to one side of the oil inlet pipe through flanges.

[0014] A method for debugging an external damping of a cylinder end of an oil pressure shock absorber, the method comprising the following steps:

[0015] S1: Install the cylinder port seal, cylinder end oil channel seal and sealing ring at the corresponding position of the cylinder end of the hydraulic shock absorber and tighten them to the sealing state;

[0016] S2: Start the hydraulic system and electronic control system. The programmable controller sends instructions to the solenoid valve group. The solenoid valve group accurately controls the flow of the hydraulic system and collects the flow data of the hydraulic system in real time through the flow transmitter. The closed-loop control of the flow of the hydraulic system is achieved through data comparison. The corresponding instructions are input to the programmable controller by the host computer to generate the specific waveform flow required for cylinder end damping debugging.

[0017] S3: The programmable controller collects the pressure information of the oil inlet pipeline and the oil return pipeline in real time, and obtains the damping force generated by the cylinder end in real time through program calculation;

[0018] S4: The host computer records the damping force data of the cylinder end to obtain the damping characteristic curve of the cylinder end;

[0019] S5: The flow transmitter collects the flow signal in real time. The programmable controller processes the flow signal to obtain the piston movement speed, and then integrates the speed to obtain the piston displacement information;

[0020] S6: Draw and generate a dynamometer diagram using the obtained real-time damping information and real-time displacement information;

[0021] S7: Observe the indicator diagram and manually adjust the cylinder end damping valve until the indicator diagram meets the requirements and the cylinder end debugging is completed.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. The debugging system of the present invention has a simple structure and is easy to maintain.

[0024] 2. The oil pressure shock absorber cylinder end sealing assembly of the debugging system of the present invention has a simple structure and the hydraulic pump station is provided with universal wheels, which can greatly increase the mobility of the equipment.

[0025] 3. The debugging system of the present invention realizes synchronous inspection and debugging through the cooperation of various subsystems, which can significantly reduce the time required for debugging the damping characteristics of the oil pressure shock absorber and greatly improve the operating efficiency of the debugging of the damping characteristics of the oil pressure shock absorber. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the overall structure of an external damping debugging system for a hydraulic shock absorber cylinder end proposed by the present invention;

[0027] Figure 2 for Figure 1 Schematic diagram of the structure of the cylinder end seal assembly of the oil pressure shock absorber;

[0028] Figure 3 for Figure 1 Schematic diagram of the hydraulic system;

[0029] Figure 4for Figure 1 Schematic diagram of the structure of the electronic control system;

[0030] Figure 5 A schematic diagram of specific waveform traffic generated by the debugging method of the present invention.

[0031] Among them, the figure markings are: 100-oil pressure shock absorber cylinder end sealing assembly; 200-hydraulic system; 300-electronic control system; 101-cylinder port seal; 102-oil pressure shock absorber cylinder end; 103-cylinder end oil channel seal; 104-sealing ring; 105-support frame; 201-hydraulic pump station; 202-solenoid valve group; 203-oil inlet pipe; 204-tee; 205-connector; 206-flange; 207-oil return pipe; 208-moving wheel; 301-pressure transmitter; 302-flow transmitter; 303-programmable controller; 304-host computer; 305-data transmission line; 401-waveform flow. DETAILED DESCRIPTION

[0032] 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 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.

[0033] It should be noted that, in the description of the present invention, the terms "up", "down", "top", "bottom", "one side", "the other side", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not mean that the device or element must have a specific orientation, be constructed and operated in a specific orientation.

[0034] See attached Figure 1-5 The present invention proposes a hydraulic shock absorber cylinder end external damping debugging system, comprising a hydraulic shock absorber cylinder end sealing assembly 100, a hydraulic system 200 and an electronic control system 300; the hydraulic shock absorber cylinder end sealing assembly 100 is correspondingly arranged at one end of the hydraulic system 200; the electronic control system 300 is connected to the hydraulic system 200. The hydraulic shock absorber cylinder end sealing assembly 100 is used to seal the hydraulic shock absorber cylinder end 102, the hydraulic system 200 provides pressure oil for the debugging system; the electronic control system 300 is used to monitor and control the oil pressure, flow, calculate the damping force and send a command signal to the hydraulic system 200.

[0035] like Figure 2As shown, the oil pressure shock absorber cylinder end sealing assembly 100 includes a cylinder port seal 101, a cylinder end oil passage seal 103, a sealing ring 104 and a support frame 105; the cylinder port seal 101 is connected to the upper port of the oil pressure shock absorber cylinder end 102 by threading to provide a sealing effect; the oil pressure shock absorber cylinder end 102 is fixed to the top of the support frame 105 by bolts; the sealing ring 104 is correspondingly arranged at the lower inner part of the oil pressure shock absorber cylinder end 102; the cylinder end oil passage seal 103 is connected to the inner bottom of the oil pressure shock absorber cylinder end 102 by threading to provide a sealing effect, and its upper end presses the lower end surface of the sealing ring 104, and the sealing ring 104 is pressed by the cylinder end oil passage seal 103 to separate and seal the oil inlet chamber and the oil return chamber of the oil pressure shock absorber cylinder end 102.

[0036] The support frame 105 is a rectangular frame welded from steel pipes, the bottom of which is fixed to the ground by anchor bolts to provide stable support for the debugging system.

[0037] like Figure 3 As shown, the hydraulic system includes a hydraulic pump station 201, a solenoid valve group 202, an oil inlet pipe 203, a tee 204, a joint 205, a flange 206 and an oil return pipe 207; the hydraulic pump station 201 provides pressure oil for the debugging system; the solenoid valve group 202 is fixedly connected to the top of the hydraulic pump station 201 by bolts and connected to it, for accurately controlling the oil flow; one end of the oil inlet pipe 203 and the oil return pipe 207 are connected to the hydraulic pump station 201 through the solenoid valve group 202; the other end of the oil inlet pipe 203 is connected to the oil inlet chamber of the oil pressure shock absorber cylinder end 102 through the joint 205; the other end of the oil return pipe 207 is connected to the oil return chamber of the oil pressure shock absorber cylinder end 102 through the joint 205. The oil inlet pipe 203 and the oil return pipe 207 are used for oil transportation. The tee 204 is installed in the middle of the oil inlet pipe 203 and the oil return pipe 207 respectively.

[0038] Among them, movable wheels 208 are respectively arranged around the bottom of the hydraulic pump station 201. In this embodiment, the movable wheels 208 are universal wheels to facilitate the movement of the hydraulic pump station 201.

[0039] like Figure 4As shown, the electronic control system includes a pressure transmitter 301, a flow transmitter 302, a programmable controller 303, a host computer 304 and a data transmission line 305; the programmable controller 303 is connected to the host computer 304 through the data transmission line 305 and communicates with it, and is used to process the cylinder end damping characteristic data and display the indicator diagram; the solenoid valve group 202 is connected to the programmable controller 303 through the data transmission line 305; the pressure transmitter 301 is provided with two, two pressure transmitters 301 and flow transmitter 302 They are connected to the programmable controller 303 through a data transmission line 305 respectively; one of the pressure transmitters 301 is connected to the middle of the oil inlet pipe 203 through a tee 204, and the other pressure transmitter 301 is connected to the middle of the oil return pipe 207 through a tee 204, for monitoring the oil inlet and oil return pressures; the flow transmitter 302 is arranged on one side of the oil inlet pipe 203 close to the solenoid valve group 202, and the two ends of the flow transmitter 302 are respectively connected to the oil inlet pipes 203 on both sides through flanges 206, for monitoring the flow of the hydraulic system 200. The programmable controller 303 collects data from the pressure transmitter 301 and the flow transmitter 302 through the data transmission line 305, and issues corresponding instructions to the solenoid valve group 202 through the data transmission line 305.

[0040] The hydraulic system 200 and the electronic control system 300 cooperate to generate a flow with a specific waveform. The hydraulic system 200 and the electronic control system 300 cooperate to realize precise feedback control of the flow; the specific method is that the host computer 304 inputs a specific waveform signal to the programmable controller 303, and the programmable controller 303 transmits the instruction to the solenoid valve group 202. The solenoid valve group 202 adjusts its own opening size according to the instruction to control the flow. The flow transmitter 302 located on the oil inlet pipe 203 monitors the flow output by the hydraulic pump station 201 in real time, and transmits the monitored flow information to the programmable controller 303 in real time. The programmable controller 303 compares the monitoring signal with the signal input by the host computer 304, and then inputs the processed signal into the solenoid valve group 202. After such a cycle, the hydraulic pump station 201 can generate a specific waveform flow for cylinder end damping debugging, such as Figure 5 shown.

[0041] In the process of generating the indicator diagram, the displacement information of the piston movement needs to be simulated. The hydraulic system 200 and the electronic control system 300 can simulate the piston displacement information. The displacement information acquisition process is: using the flow transmitter 302 to collect the flow signal in real time, and the programmable controller 303 processes the flow signal to obtain the piston movement speed, and then integrates the speed to obtain the displacement information of the piston.

[0042] A method for debugging an external damping of a cylinder end of a hydraulic shock absorber specifically comprises the following steps:

[0043] S1: Install the cylinder port seal 101, the cylinder end oil passage seal 103 and the sealing ring 104 at the corresponding positions of the oil pressure shock absorber cylinder end 102 and tighten them to a sealing state;

[0044] S2: Start the hydraulic system 200 and the electronic control system 300. The programmable controller 303 sends instructions to the solenoid valve group 202. The solenoid valve group 202 accurately controls the flow of the hydraulic system and collects the flow data of the hydraulic system 200 in real time through the flow transmitter 302. The closed-loop control of the flow of the hydraulic system 200 is achieved through data comparison. The host computer 304 inputs corresponding instructions to the programmable controller 303 to generate the specific waveform flow required for cylinder end damping debugging.

[0045] S3: The programmable controller 303 collects the pressure information of the oil inlet pipe 203 and the oil return pipe 207 in real time, and calculates the damping force generated by the cylinder end in real time through program calculation (the product of the oil inlet and return pressure difference and the piston area);

[0046] S4: Record the cylinder end damping force data through the host computer 304 to obtain the damping characteristic curve of the cylinder end of the oil pressure shock absorber;

[0047] S5: The flow transmitter 302 collects the flow signal in real time, and the programmable controller 303 processes the flow signal to obtain the piston movement speed, and then integrates the speed to obtain the displacement information of the piston;

[0048] S6: Draw and generate a dynamometer diagram using the obtained real-time damping information and real-time displacement information;

[0049] S7: Observe the indicator diagram and manually adjust the cylinder end damping valve until the indicator diagram meets the requirements and the cylinder end debugging is completed.

[0050] Matters not described in detail in the present invention are all known technologies.

[0051] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An external damping debugging system for a hydraulic shock absorber cylinder end, characterized in that: The system comprises an oil pressure shock absorber cylinder end sealing component, a hydraulic system and an electronic control system; the oil pressure shock absorber cylinder end sealing component is arranged at one end of the hydraulic system; and the electronic control system is connected to the hydraulic system.

2. The external damping debugging system for the cylinder end of a hydraulic shock absorber according to claim 1 is characterized in that: The oil pressure shock absorber cylinder end sealing assembly comprises a cylinder port seal, a cylinder end oil passage seal, a sealing ring and a support frame; the cylinder port seal is connected to the upper port of the oil pressure shock absorber cylinder end by means of threads; the oil pressure shock absorber cylinder end is fixed to the top of the support frame by means of bolts; the sealing ring is correspondingly arranged at the lower inner part of the oil pressure shock absorber cylinder end; the cylinder end oil passage seal is connected to the inner bottom of the oil pressure shock absorber cylinder end by means of threads, and its upper end presses the lower end surface of the sealing ring to separate and seal the oil inlet chamber and the oil return chamber of the oil pressure shock absorber cylinder end.

3. The external damping debugging system for the cylinder end of a hydraulic shock absorber according to claim 2 is characterized in that: The support frame is formed by welding steel pipes and is fixed on the ground by anchor bolts.

4. The external damping debugging system for the cylinder end of a hydraulic shock absorber according to claim 2 is characterized in that: The hydraulic system includes a hydraulic pump station, a solenoid valve group, an oil inlet pipe, a joint and an oil return pipe; the hydraulic pump station provides pressure oil for the debugging system; the solenoid valve group is fixedly connected to the hydraulic pump station by bolts to accurately control the oil flow; one end of the oil inlet pipe and the oil return pipe are connected to the hydraulic pump station through the solenoid valve group; the other end of the oil inlet pipe is connected to the oil inlet chamber at the cylinder end of the oil pressure shock absorber through a joint; the other end of the oil return pipe is connected to the oil return chamber at the cylinder end of the oil pressure shock absorber through a joint.

5. The hydraulic shock absorber cylinder end external damping debugging system according to claim 4 is characterized in that: The bottom of the hydraulic pump station is respectively provided with moving wheels around.

6. The external damping debugging system for the cylinder end of a hydraulic shock absorber according to claim 5 is characterized in that: The moving wheel is a universal wheel.

7. The external damping debugging system for the cylinder end of a hydraulic shock absorber according to claim 4 is characterized in that: The electronic control system includes a pressure transmitter, a flow transmitter, a programmable controller, a host computer and a data transmission line; the programmable controller is connected to the host computer through the data transmission line; the solenoid valve group is connected to the programmable controller through the data transmission line; two pressure transmitters are provided, and the two pressure transmitters and the flow transmitter are respectively connected to the programmable controller through the data transmission line; one of the pressure transmitters is connected to the middle of the oil inlet pipe through a tee, and the other pressure transmitter is connected to the middle of the oil return pipe through a tee; both ends of the flow transmitter are respectively connected to one side of the oil inlet pipe through flanges.

8. The method for adjusting the external damping adjustment system of the cylinder end of a hydraulic shock absorber according to claim 7 is characterized in that: The method comprises the following steps: S1: Install the cylinder port seal, cylinder end oil channel seal and sealing ring at the corresponding position of the cylinder end of the hydraulic shock absorber and tighten them to the sealing state; S2: Start the hydraulic system and electronic control system. The programmable controller sends instructions to the solenoid valve group. The solenoid valve group accurately controls the flow of the hydraulic system and collects the flow data of the hydraulic system in real time through the flow transmitter. The closed-loop control of the flow of the hydraulic system is achieved through data comparison. The corresponding instructions are input to the programmable controller by the host computer to generate the specific waveform flow required for cylinder end damping debugging. S3: The programmable controller collects the pressure information of the oil inlet pipeline and the oil return pipeline in real time, and obtains the damping force generated by the cylinder end in real time through program calculation; S4: The host computer records the damping force data of the cylinder end to obtain the damping characteristic curve of the cylinder end; S5: The flow transmitter collects the flow signal in real time. The programmable controller processes the flow signal to obtain the piston movement speed, and then integrates the speed to obtain the piston displacement information; S6: Draw and generate a dynamometer diagram using the obtained real-time damping information and real-time displacement information; S7: Observe the indicator diagram and manually adjust the cylinder end damping valve until the indicator diagram meets the requirements and the cylinder end debugging is completed.

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