A hydraulic actuator speed limiter

Abstract

This utility model belongs to the field of hydraulic technology control technology for amusement equipment, specifically a speed limiting device for a hydraulic actuator. It includes a speed limiting valve block, with a two-way cartridge valve installed on the top side inside the speed limiting valve block. An oil passage is located below the two-way cartridge valve inside the speed limiting valve block. An oil inlet is located on the left side of the speed limiting valve block, communicating with the first oil passage. An oil outlet is located on the right side of the speed limiting valve block, communicating with the first oil passage. A damping rod is installed inside the oil outlet. By integrating the two-way cartridge valve, pilot-operated relief valve, stainless steel damping rod, and dual damping components (damping element 1 and damping element 2), a multi-loop collaborative control structure is formed. This structure utilizes the damping rod to generate a base pressure difference for speed limiting, and the dual damping components finely adjust the pressure difference gradient. Combined with the overpressure protection function of the pilot-operated relief valve, it effectively improves the speed control accuracy and response speed of the hydraulic actuator.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic technology control technology for amusement equipment, specifically a speed limiting device for a hydraulic actuator. Background Technology

[0002] As amusement equipment (such as rotating towers) develops towards higher speeds and greater precision, the speed control accuracy and safety of their hydraulic actuators have become core requirements.

[0003] Existing hydraulic speed limiting devices mostly use a single throttling element or ordinary valve control, which have problems such as response lag, limited differential pressure adjustment range, and single adaptability to flow conditions. They are difficult to cope with the dynamic speed changes of amusement equipment under different loads, and are prone to speed overshoot or insufficient control accuracy, which poses a hidden danger to the safe operation of the equipment. They cannot fully meet the high stability and high safety control requirements of amusement equipment for hydraulic actuators. Therefore, we propose a hydraulic actuator speed limiting device. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a hydraulic actuator speed limiting device. By integrating a two-way cartridge valve, a pilot-operated relief valve, a stainless steel damping rod, and dual damping components (damping element 1 and damping element 2), a multi-loop collaborative control structure is formed, which effectively improves the speed control accuracy and response speed of the hydraulic actuator and solves the problems mentioned earlier.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a hydraulic actuator speed limiting device, comprising a speed limiting valve block, a two-way cartridge valve installed on the top side of the inside of the speed limiting valve block, an oil passage first located below the two-way cartridge valve inside the speed limiting valve block, an oil inlet on the left side of the speed limiting valve block communicating with the oil passage first, an oil outlet channel on the right side of the inside of the speed limiting valve block communicating with the oil passage first, a damping rod installed inside the oil outlet channel, and the front and rear sides of the speed limiting valve block... Both are equipped with oil outlets, and both sets of oil outlets are connected to the oil flow channel. A two-way cartridge valve cover plate is fixedly installed on the top side of the speed limiting valve block by bolts. An oil passage two is opened inside the two-way cartridge valve cover plate. A connecting flow channel one is opened between the oil passage two and the oil passage one. A damper number one is installed inside the connecting flow channel one. A connecting flow channel two is opened between the oil passage two and the two-way cartridge valve. A damper number two is installed inside the connecting flow channel two. An overflow valve is installed at the right end of the oil passage two. A pressure test connector is installed on the top side of the oil passage two.

[0006] Preferably, an overflow channel is provided between the speed limiting valve block and the two-way cartridge valve cover plate, the input end of the overflow channel is fixedly connected to the output end of the overflow valve, and an overflow port is provided on the right side of the speed limiting valve block, the overflow port is fixedly connected to the output end of the overflow channel.

[0007] Preferably, a valve block base is fixedly installed on the bottom side of the speed limiting valve block by bolts.

[0008] Preferably, the two-way cartridge valve is a two-position, two-normally closed, electromagnetically piloted two-way cartridge valve.

[0009] Preferably, the overflow valve is a pilot-operated overflow valve.

[0010] Preferably, the damping rod is made of stainless steel.

[0011] This invention provides a speed limiting device for a hydraulic actuator. Compared with the prior art, it has the following advantages:

[0012] 1. This hydraulic actuator speed limiting device integrates a two-way cartridge valve, a pilot-operated relief valve, a stainless steel damping rod, and dual damping components (damping No. 1 and damping No. 2) to form a multi-loop collaborative control structure. It utilizes the damping rod to generate a basic pressure difference to achieve speed limiting, and the dual damping components finely adjust the pressure difference gradient. Combined with the overpressure protection function of the pilot-operated relief valve, it effectively improves the speed control accuracy and response speed of the hydraulic actuator. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the front view of the main body structure of this utility model;

[0014] Figure 2 This is a schematic diagram of the front cross-sectional structure of the main body of this utility model;

[0015] Figure 3 This is a schematic diagram of the left-side structure of the main body of this utility model;

[0016] Figure 4 This is a schematic diagram of the left-side cross-sectional structure of the main body of this utility model.

[0017] In the diagram: 1. Speed ​​limiter valve block; 2. Two-way cartridge valve cover plate; 3. Pressure test connector; 4. Relief valve; 5. Valve block base; 6. Oil outlet; 7. Oil inlet; 8. Oil passage one; 9. Damping rod; 10. Two-way cartridge valve; 11. Connecting flow channel one; 12. Overflow channel; 13. Oil passage two; 14. Connecting flow channel two; 15. Damping one; 16. Damping two; 17. Overflow port; 18. Oil outlet flow channel. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-4 This utility model provides a technical solution: a hydraulic actuator speed limiting device, including a speed limiting valve block 1. A two-way cartridge valve 10 is installed on the top side inside the speed limiting valve block 1. An oil passage 8 is opened inside the speed limiting valve block 1 below the two-way cartridge valve 10. An oil inlet 7 is opened on the left side of the speed limiting valve block 1, which communicates with the oil passage 8. An oil outlet channel 18 is opened on the right side inside the speed limiting valve block 1, which communicates with the oil passage 8. A damping rod 9 is installed inside the oil outlet channel 18. Oil outlets 6 are opened on both the front and rear sides of the speed limiting valve block 1. Oil outlet 6 is connected to oil outlet channel 18. A two-way cartridge valve cover plate 2 is fixedly installed on the top side of the speed limiter valve block 1 by bolts. An oil passage 2 13 is opened inside the two-way cartridge valve cover plate 2. A connecting channel 11 is opened between oil passage 2 13 and oil passage 1 8. A damper 1 15 is installed inside the connecting channel 11. A connecting channel 2 14 is opened between oil passage 2 13 and two-way cartridge valve 10. A damper 2 16 is installed inside the connecting channel 2 14. An overflow valve 4 is installed at the right end of oil passage 2 13. A pressure test connector 3 is installed on the top side of oil passage 2 13.

[0020] When the hydraulic actuator speed limiting device is working, hydraulic oil flows in from the inlet 7 and then into oil passage 8. Part of the hydraulic oil in oil passage 8 flows to the outlet passage 18. When it flows through the damping rod 9 in the outlet passage 18, a pressure difference is generated, and then it flows out from the two sets of outlet ports 6. Another part of the hydraulic oil enters the second oil passage 13 through the connecting passage 11. When it flows through the damping rod 15 in the connecting passage 11, the pressure is further regulated. Part of the hydraulic oil in the second oil passage 13 flows to the two-way cartridge valve 10 through the connecting passage 14. When it flows through the damping rod 16 in the connecting passage 14, the pressure is regulated again. The two-way cartridge valve 10 controls the on / off state and the flow rate. Another part of the hydraulic oil in the second oil passage 13 can flow out from the overflow port 17 through the overflow channel 12 via the overflow valve 4 at the right end, realizing overpressure protection. At the same time, the pressure tester 3 can monitor the pressure in the second oil passage 13 in real time to ensure that the entire device works stably according to the set logic and completes the speed limiting control of the hydraulic actuator.

[0021] An overflow channel 12 is provided between the speed limiter valve block 1 and the two-way cartridge valve cover plate 2. The input end of the overflow channel 12 is fixedly connected to the output end of the overflow valve 4. An overflow port 17 is provided on the right side of the speed limiter valve block 1. The overflow port 17 is fixedly connected to the output end of the overflow channel 12. When the pressure in the second oil passage 13 exceeds the set value of the overflow valve 4, the overflow valve 4 opens, and the hydraulic oil is discharged from the overflow port 17 through the overflow channel 12 to avoid system overpressure.

[0022] The bottom side of the speed limiting valve block 1 is fixedly mounted with a valve block base 5 by bolts, which provides a stable support for the entire device, so that the speed limiting valve block 1 and the components mounted on it maintain structural stability under the high pressure of hydraulic oil, and prevent the oil circuit sealing and control accuracy from being affected by vibration or displacement.

[0023] The two-way cartridge valve 10 is a two-position, two-normally closed, electromagnetically piloted two-way cartridge valve. Initially, it is in the closed state. When the electromagnetic pilot signal is triggered, the valve opens, so that the connecting flow channel 2 14 and the two-way cartridge valve 10 form a passage, participating in the dynamic regulation of oil circuit pressure and flow, and realizing rapid response control of the hydraulic actuator speed.

[0024] The relief valve 4 is a pilot-operated relief valve. The pilot valve controls the action of the main valve and can accurately set the maximum allowable pressure in the second oil passage 13. When the pressure in the second oil passage 13 reaches the set value, the pilot valve acts first, driving the main valve to open and allowing the hydraulic oil to be discharged through the relief channel 12, ensuring that the system pressure is stable within a safe range.

[0025] The damping rod 9 is made of stainless steel, which has good corrosion resistance and structural strength.

[0026] Working principle: When the hydraulic actuator speed limiting device is working, hydraulic oil flows in from the inlet 7 and enters oil passage 1 8. Part of the hydraulic oil in oil passage 1 8 flows to the outlet passage 18. When it flows through the damping rod 9 in the outlet passage 18, a pressure difference is generated, and then it flows out from the two sets of outlets 6. The other part of the hydraulic oil enters the second oil passage 13 through the connecting passage 11. When it flows through the damping rod 15 in the connecting passage 11, the pressure is further regulated. Part of the hydraulic oil in the second oil passage 13 flows through the connecting passage 11 through the connecting passage 12. The flow path 14 leads to the two-way cartridge valve 10. When the flow passes through the damper 16 in the connecting flow path 14, the pressure is adjusted again. The two-way cartridge valve 10 controls the on / off state and the flow rate. Another part of the hydraulic oil in the oil passage 13 can flow out through the overflow valve 4 at the right end and the overflow channel 12 from the overflow port 17 to achieve overpressure protection. At the same time, the pressure test connector 3 can monitor the pressure in the oil passage 13 in real time to ensure that the entire device works stably according to the set logic and completes the speed limiting control of the hydraulic actuator.

[0027] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0028] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A hydraulic actuator speed limiting device, comprising a speed limiting valve block (1), characterized in that: A two-way cartridge valve (10) is installed on the top side inside the speed limiting valve block (1). An oil passage (8) is opened inside the speed limiting valve block (1) below the two-way cartridge valve (10). An oil inlet (7) is opened on the left side of the speed limiting valve block (1), and the oil inlet (7) is connected to the oil passage (8). An oil outlet channel (18) is opened on the right side inside the speed limiting valve block (1), and the oil passage (8) is connected to the oil outlet channel (18). A damping rod (9) is installed inside the oil outlet channel (18). An oil outlet (6) is opened on both the front and rear sides of the speed limiting valve block (1), and both sets of oil outlets (6) are connected to the oil outlet channel (18). The top side of the speed limiting valve block (1) is fixed with a two-way cartridge valve cover plate (2) by bolts. The two-way cartridge valve cover plate (2) has an oil passage two (13) inside. The oil passage two (13) and the oil passage one (8) have a connecting flow channel one (11) inside. The connecting flow channel one (11) has a damping first (15) inside. The oil passage two (13) and the two-way cartridge valve (10) have a connecting flow channel two (14) inside. The connecting flow channel two (14) has a damping second (16) inside. The right end of the oil passage two (13) has an overflow valve (4) installed. The top side of the oil passage two (13) has a pressure test connector (3).

2. The hydraulic actuator speed limiting device according to claim 1, characterized in that: An overflow channel (12) is provided between the speed limiting valve block (1) and the two-way cartridge valve cover plate (2). The input end of the overflow channel (12) is fixedly connected to the output end of the overflow valve (4). An overflow port (17) is provided on the right side of the speed limiting valve block (1). The overflow port (17) is fixedly connected to the output end of the overflow channel (12).

3. The hydraulic actuator speed limiting device according to claim 1, characterized in that: The bottom side of the speed limiting valve block (1) is fixedly installed with a valve block base (5) by bolts.

4. A hydraulic actuator speed limiting device according to claim 1, characterized in that: The two-way cartridge valve (10) is a two-position, normally closed, electromagnetic pilot two-way cartridge valve.

5. A hydraulic actuator speed limiting device according to claim 1, characterized in that: The overflow valve (4) is a pilot-operated overflow valve.

6. A hydraulic actuator speed limiting device according to claim 1, characterized in that: The damping rod (9) is made of stainless steel.

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