Multifunctional load simulation and energy recovery device

Abstract

The present invention provides a multifunctional load simulation and energy recovery device, relating to the technical field of hydraulic systems, comprising an intermediate cylinder, a hydraulic mechanism, a rack-and-pinion mechanism, a hydraulic circuit, and a frame. The intermediate cylinder and the hydraulic circuit are separately connected to the frame, the rack-and-pinion mechanism is located below the intermediate cylinder, and the rack-and-pinion mechanism is connected to the hydraulic mechanism. The hydraulic mechanism is separately connected to both sides of the intermediate cylinder, and the hydraulic mechanism is connected to the hydraulic circuit via a first oil pipe. The present invention enables separate and simultaneous simulation of displacement-force loads and torque-angular displacement loads. The use of a hydraulic circuit enables automatic logic control, making load simulation more convenient. Modular assembly is used, and torque load simulation and force load simulation share a common oil circuit, requiring minimal space. Automatic energy recovery can be achieved during the simulation of loads of different types and sizes.

Description

Technical Field

[0001] The present invention relates to the technical field of hydraulic systems, and in particular to a multifunctional load simulation and energy recovery device. Background Art

[0002] Electro-hydraulic actuators are widely used in oil pipelines, emergency shutdowns in oil tank farms, water conservancy water hammer prevention and emergency shutdowns, wellheads, petrochemicals, steel mill blast furnace venting towers, and power plant mine gas quick-cut valves. For different applications, it is necessary to select or design electro-hydraulic actuators with different structures, output forms, and power characteristics. Therefore, the performance parameters of electro-hydraulic actuators need to be comprehensively and accurately tested to meet the application requirements of different scenarios. During the performance testing of electro-hydraulic actuators, different load conditions need to be simulated. Existing load simulations include mechanical systems, hydraulic systems, and other different forms. They either have a single function and limited test objects and scope, or they have a complex system structure, occupy a large area, are complex to operate, and have a low degree of automation. Some load simulation systems even require an external power system. At the same time, energy is not recycled during the test process, resulting in energy waste. Summary of the Invention

[0003] In view of the defects in the prior art, the purpose of the present invention is to provide a multifunctional load simulation and energy recovery device.

[0004] According to the present invention, a multifunctional load simulation and energy recovery device includes an intermediate cylinder, a hydraulic mechanism, a rack and pinion mechanism, a hydraulic circuit, and a frame. The intermediate cylinder and the hydraulic circuit are respectively connected to the frame. The rack and pinion mechanism is located below the intermediate cylinder. The rack and pinion mechanism is connected to the hydraulic mechanism. The hydraulic mechanism is respectively connected to both sides of the intermediate cylinder. The hydraulic mechanism is connected to the hydraulic circuit via a first oil pipe.

[0005] During the load simulation process, external force acts on the hydraulic device or gear rack mechanism, and the automatic logic control of the hydraulic circuit realizes the separate and simultaneous simulation of the displacement-force load and the torque-angular displacement load. At the same time, the energy in the load simulation process can be recovered.

[0006] In some embodiments, the hydraulic mechanism includes a first hydraulic mechanism and a second hydraulic mechanism, and the first hydraulic mechanism and the second hydraulic mechanism are respectively connected to two sides of the intermediate cylinder;

[0007] The first hydraulic mechanism and the second hydraulic mechanism have the same structure, including a cylinder body, a slide groove, a piston assembly and a guide sleeve. The cylinder body is connected to both sides of the middle cylinder body. The cylinder body is provided with a slide groove, and the slide groove is provided with a piston assembly. The end of the piston assembly is connected to the guide sleeve.

[0008] The piston assembly comprises a piston and a piston rod, one end of the piston rod is arranged in the slide groove, the piston is connected to one end of the piston rod, and the guide sleeve is connected to the other end of the piston rod.

[0009] In some embodiments, the hydraulic circuit includes an oil tank, a valve block, a hydraulically controlled one-way valve, a pressure valve, an accumulator, a flow regulating valve and a hydraulic motor. The oil tank is connected to the frame, the valve block is connected to the oil tank, the accumulator, the flow regulating valve and the hydraulic motor array are distributed on the upper surface of the valve block, the valve block is connected to the cylinder body through a first oil pipe, the hydraulically controlled one-way valve is respectively located at both ends of the accumulator, the pressure valve is respectively located at both ends of the hydraulic motor, the hydraulic motor is connected to the oil tank through a second oil pipe, one end of the second oil pipe passes through the valve block and is connected to the hydraulic motor, and the other end of the second oil pipe extends into the oil tank.

[0010] In some embodiments, when the pressure valve detects that the pressure is greater than a set value, the cylinder is connected to the accumulator, the hydraulically controlled one-way valve is opened, and the cylinder is connected to the oil tank.

[0011] In some embodiments, the flow regulating valve includes a first flow regulating valve, a second flow regulating valve, and a third flow regulating valve, wherein the first flow regulating valve and the third flow regulating valve are respectively connected to both ends of the second flow regulating valve;

[0012] The first flow regulating valve is connected to the first hydraulic mechanism, and the connection and disconnection between the oil tank and the cylinder oil port in the first hydraulic mechanism are achieved through the regulation of the first flow regulating valve;

[0013] The third flow regulating valve is connected to the second hydraulic mechanism, and the connection and disconnection between the oil tank and the cylinder oil port in the second hydraulic mechanism are achieved through the regulation of the third flow regulating valve;

[0014] The connection and disconnection of the oil circuit between the accumulator and the hydraulic motor are achieved through the regulation of the second flow regulating valve.

[0015] In some embodiments, the first flow regulating valve is opened, and the cylinder oil port in the first hydraulic mechanism is connected to the oil tank through the second oil pipe;

[0016] The third flow regulating valve is opened, and the cylinder oil port in the second hydraulic mechanism is connected to the oil tank through the second oil pipe.

[0017] In some embodiments, the rack and pinion mechanism includes a rack, a gear output shaft, and a gear. The two ends of the rack are respectively connected to the piston assembly, the gear is meshed with the rack, the gear is provided on the gear output shaft, the gear output shaft is connected to the frame, and the gear is located directly below the middle cylinder body.

[0018] In some embodiments, when an external force acts on the first hydraulic mechanism, the pressure in the cylinder of the first hydraulic mechanism decreases, and the oil pressure in the cylinder of the second hydraulic mechanism increases;

[0019] In the first hydraulic mechanism, the hydraulically controlled one-way valve is opened, and the oil in the oil tank flows into the cylinder;

[0020] In the second hydraulic mechanism, when the oil pressure in the cylinder is greater than the corresponding preset value of the pressure valve, the hydraulically controlled one-way valve is opened, and the oil flows into the accumulator through the pressure valve, turning on the hydraulic motor, and the oil in the accumulator flows into the oil tank through the second pipeline, driving the hydraulic motor to output power, and the rack drives the gear to rotate.

[0021] In some embodiments, when an external force acts on the second hydraulic mechanism, the pressure in the cylinder of the second hydraulic mechanism decreases, and the oil in the oil tank flows into the second hydraulic mechanism;

[0022] The oil pressure in the cylinder of the first hydraulic mechanism increases, and the oil in the first hydraulic mechanism flows into the oil tank, driving the hydraulic motor to output power, and the rack drives the gear to rotate.

[0023] In some embodiments, when the gear output shaft rotates clockwise, the gear drives the rack to rotate, the pressure in the cylinder of the first hydraulic mechanism decreases, and the oil in the oil tank flows into the first hydraulic mechanism; the pressure in the cylinder of the second hydraulic mechanism increases, and the oil in the second hydraulic mechanism flows into the oil tank;

[0024] When the gear output shaft rotates counterclockwise, the rack drives the gear to rotate, the pressure in the cylinder of the second hydraulic mechanism decreases, and the oil in the oil tank flows into the second hydraulic mechanism; the pressure in the cylinder of the first hydraulic mechanism increases, and the oil in the first hydraulic mechanism flows into the oil tank.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The present invention realizes the separate and simultaneous simulation of two loads: displacement-force load and torque-angular displacement load. The hydraulic circuit can realize automatic logic control, making load simulation more convenient.

[0027] (2) The present invention adopts modular assembly, and the gear output shaft and the piston assembly share the oil circuit, which occupies a small space and can realize automatic energy recovery and utilization during the simulation of loads of different forms and sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Other features, objects and advantages of the present invention will become more apparent upon reading the detailed description of non-limiting embodiments with reference to the following drawings:

[0029] Figure 1 It is a structural schematic diagram of the present invention;

[0030] Figure 2 A top view of the present invention;

[0031] Figure 3 is a cross-sectional view of the present invention;

[0032] Figure 4 This is the hydraulic principle diagram of energy recovery and utilization of the present invention.

[0033] Numbers in the figure:

[0034] Intermediate cylinder 1, hydraulic mechanism 2, cylinder body 21, slide 22, piston assembly 23, piston 231, piston rod 232, guide sleeve 24, rack and pinion mechanism 3, rack 31, gear output shaft 32, gear 33, hydraulic circuit 4, oil tank 41, valve block 42, hydraulic motor 43, hydraulically controlled one-way valve 44, pressure valve 45, accumulator 46, flow regulating valve 47, first flow regulating valve 471, second flow regulating valve 472, third flow regulating valve 473, frame 5, first oil pipe 6, second oil pipe 7. DETAILED DESCRIPTION

[0035] The present invention will be described in detail below with reference to specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those skilled in the art, several changes and improvements can be made without departing from the scope of the present invention. These all fall within the scope of protection of the present invention.

[0036] Example 1

[0037] The present invention provides a multifunctional load simulation and energy recovery device, such as Figure 1-3 As shown, it includes an intermediate cylinder body 1, a hydraulic mechanism 2, a gear rack mechanism 3, a hydraulic circuit 4 and a frame 5. The intermediate cylinder body 1 and the hydraulic circuit 4 are respectively connected to the frame 5. The gear rack mechanism 3 is located below the intermediate cylinder body 1, and the gear rack mechanism 3 is connected to the hydraulic mechanism 2. The hydraulic mechanism 2 is connected to the hydraulic circuit 4 through a first oil pipe 6. The hydraulic mechanism 2 includes a first hydraulic mechanism and a second hydraulic mechanism. The first hydraulic mechanism and the second hydraulic mechanism are respectively connected to both sides of the intermediate cylinder body 1.

[0038] like Figure 3 As shown, the first and second hydraulic mechanisms have the same structure, including a cylinder 21, a slide 22, a piston assembly 23, and a guide sleeve 24. The slide 22 is provided in the cylinder 21, and the piston assembly 23 is provided in the slide 22. The end of the piston assembly 23 is connected to the guide sleeve 24. The cylinder 21 is connected to the intermediate cylinder 1, which is a hollow structure with an opening at the bottom.

[0039] like Figure 3 As shown, the piston assembly 23 includes a piston 231 and a piston rod 232 . One end of the piston rod 232 is disposed in the slide groove 22 . The piston 231 is connected to one end of the piston rod 232 . The guide sleeve 24 is connected to the other end of the piston rod 232 .

[0040] like Figure 2-3As shown, the rack and pinion mechanism 3 includes a rack 31, a gear output shaft 32 and a gear 33. The two ends of the rack 31 are respectively connected to the piston assembly 23. The gear 33 is meshed with the rack 31. The gear 33 is provided on the gear output shaft 32. The gear output shaft 32 is connected to the frame 5. The gear 33 is located directly below the intermediate cylinder body 1.

[0041] Working principle: During the load simulation process, external force acts on the hydraulic device 2 or the gear rack mechanism 3, and the hydraulic circuit 4 is automatically logically controlled to realize the separate simulation and simultaneous simulation of the displacement-force load and the torque-angular displacement load. At the same time, the energy in the load simulation process can be recovered.

[0042] More specifically, the cylinder body 21 is connected to both sides of the intermediate cylinder body 1 , and the cylinder body 21 and the intermediate cylinder body 1 are a whole. A portion of the intermediate cylinder body 1 is cut away, and the gear 33 and the rack 31 are engaged in the cut away portion.

[0043] Example 2

[0044] This embodiment 2 is completed on the basis of embodiment 1, and the load simulation is made simpler through the automatic logic control of the hydraulic circuit. Specifically:

[0045] like Figure 1-4 As shown, the hydraulic circuit 4 includes an oil tank 41, a valve block 42, a hydraulically controlled one-way valve 44, a pressure valve 45, an accumulator 46, a flow regulating valve 47, and a hydraulic motor 43. The oil tank 41 is connected to the frame 5, and the valve block 42 is connected to the oil tank 41. The accumulator 46, the flow regulating valve 47, and the hydraulic motor 43 are arranged in an array on the upper surface of the valve block 42. The valve block 42 is connected to the cylinder 21 via a first oil pipe 6. The hydraulically controlled one-way valve 44 is located at both ends of the accumulator 46, and the pressure valve 45 is located at both ends of the hydraulic motor 43. The hydraulic motor 43 is connected to the oil tank 41 via a second oil pipe 7. One end of the second oil pipe 7 passes through the valve block 42 and is connected to the hydraulic motor 43. The other end of the second oil pipe 7 extends into the oil tank 41. When the pressure valve 45 detects that the pressure is greater than the set value, the cylinder 21 is connected to the accumulator 46, the hydraulically controlled one-way valve 44 opens, and the cylinder 21 is connected to the oil tank 41.

[0046] The flow control valve 47 includes a first flow control valve 471, a second flow control valve 472, and a third flow control valve 473. The first and third flow control valves 471 and 473 are connected to the ends of the second flow control valve 472, respectively. The first flow control valve 471 connects to the first hydraulic mechanism. Adjustment of the first flow control valve 471 connects and disconnects the oil port of the oil tank 3 and the cylinder 21 in the first hydraulic mechanism. When the first flow control valve 471 is open, the oil port of the cylinder 21 in the first hydraulic mechanism is connected to the oil tank 41 via the second oil pipe 7. The third flow control valve 473 connects to the second hydraulic mechanism. Adjustment of the third flow control valve 473 connects and disconnects the oil port of the oil tank 3 and the cylinder 21 in the second hydraulic mechanism. When the third flow control valve 473 is open, the oil port of the cylinder 21 in the second hydraulic mechanism is connected to the oil tank 41 via the second oil pipe 7. Adjustment of the second flow control valve 472 connects and disconnects the oil circuit within the accumulator 46 and the hydraulic motor 43.

[0047] like Figure 4 As shown, when an external force acts on the first hydraulic mechanism, the pressure within cylinder 21 of the first hydraulic mechanism decreases, while the oil pressure within cylinder 21 of the second hydraulic mechanism increases. In the first hydraulic mechanism, the hydraulically controlled one-way valve 44 opens, allowing the oil in oil tank 41 to flow into cylinder 21. In the second hydraulic mechanism, when the oil pressure within cylinder 21 exceeds the predetermined value of the corresponding pressure valve 45, the hydraulically controlled one-way valve 44 opens, allowing the oil to flow through pressure valve 45 into accumulator 46, turning on hydraulic motor 43. The oil in accumulator 46 flows through second pipe 7 into oil tank 41, driving hydraulic motor 43 to output power, and rack 31 drives gear 33 to rotate.

[0048] When an external force acts on the second hydraulic mechanism, the pressure in cylinder 21 of the second hydraulic mechanism decreases, causing the oil in tank 41 to flow into the second hydraulic mechanism. The pressure in cylinder 21 of the first hydraulic mechanism increases, causing the oil in the first hydraulic mechanism to flow into tank 41, driving hydraulic motor 43 to output power, and rack 31 to rotate gear 33.

[0049] When an external force acts on the rack and pinion mechanism 3, the gear output shaft 32 rotates clockwise, causing the gear 33 to rotate the rack 31, reducing the pressure in the cylinder 21 of the first hydraulic mechanism and causing the oil in the oil tank 41 to flow into the first hydraulic mechanism. The pressure in the cylinder 21 of the second hydraulic mechanism increases, causing the oil in the second hydraulic mechanism to flow into the oil tank 41. Alternatively, when the gear output shaft 32 rotates counterclockwise, the rack 31 drives the gear 33 to rotate, reducing the pressure in the cylinder 21 of the second hydraulic mechanism and causing the oil in the oil tank 41 to flow into the second hydraulic mechanism. The pressure in the cylinder 21 of the first hydraulic mechanism increases, causing the oil in the first hydraulic mechanism to flow into the oil tank 41.

[0050] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0051] The above describes specific embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art may make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. The embodiments of this application and the features in the embodiments may be combined with each other in any manner unless there is a conflict.

Claims

1. A multifunctional load simulation and energy recovery device, characterized in that: The invention comprises an intermediate cylinder (1), a hydraulic mechanism (2), a gear rack mechanism (3), a hydraulic circuit (4) and a frame (5), wherein the intermediate cylinder (1) and the hydraulic circuit (4) are respectively connected to the frame (5), the gear rack mechanism (3) is located below the intermediate cylinder (1), and the gear rack mechanism (3) is connected to the hydraulic mechanism (2), the hydraulic mechanism (2) is respectively connected to both sides of the intermediate cylinder (1), and the hydraulic mechanism (2) is connected to the hydraulic circuit (4) through a first oil pipe (6); During the load simulation process, an external force acts on the hydraulic mechanism (2) or the rack and pinion mechanism (3), and the hydraulic circuit (4) automatically controls the logic to achieve separate and simultaneous simulations of the displacement-force load and the torque-angular displacement load, while also recovering energy during the load simulation process; The hydraulic mechanism (2) comprises a first hydraulic mechanism and a second hydraulic mechanism, wherein the first hydraulic mechanism and the second hydraulic mechanism are respectively connected to both sides of the intermediate cylinder (1); The first hydraulic mechanism and the second hydraulic mechanism have the same structure, comprising a cylinder body (21), a slide groove (22), a piston assembly (23) and a guide sleeve (24); the cylinder body (21) is connected to both sides of the intermediate cylinder body (1); the slide groove (22) is provided in the cylinder body (21); the piston assembly (23) is provided in the slide groove (22); and the end of the piston assembly (23) is connected to the guide sleeve (24); The piston assembly (23) includes a piston (231) and a piston rod (232), one end of the piston rod (232) is disposed in the slide groove (22), the piston (231) is connected to one end of the piston rod (232), and the guide sleeve (24) is connected to the other end of the piston rod (232); The hydraulic circuit (4) includes an oil tank (41), a valve block (42), a hydraulically controlled one-way valve (44), a pressure valve (45), an accumulator (46), a flow regulating valve (47) and a hydraulic motor (43). The oil tank (41) is connected to the frame (5), the valve block (42) is connected to the oil tank (41), the accumulator (46), the flow regulating valve (47) and the hydraulic motor (43) are distributed in an array on the upper surface of the valve block (42), and the valve block (42) The first oil pipe (6) is connected to the cylinder (21), the two hydraulically controlled one-way valves (44) are respectively located at both ends of the accumulator (46), the two pressure valves (45) are respectively located at both ends of the hydraulic motor (43), the hydraulic motor (43) is connected to the oil tank (41) through the second oil pipe (7), one end of the second oil pipe (7) passes through the valve block (42) and is connected to the hydraulic motor (43), and the other end of the second oil pipe (7) extends into the oil tank (41); The rack and pinion mechanism (3) comprises a rack (31), a gear output shaft (32) and a gear (33), the two ends of the rack (31) are respectively connected to the piston assembly (23), the gear (33) is meshed with the rack (31), the gear (33) is arranged on the gear output shaft (32), the gear output shaft (32) is connected to the frame (5), and the gear (33) is located directly below the intermediate cylinder (1).

2. The multifunctional load simulation and energy recovery device according to claim 1, characterized in that: The flow regulating valve (47) comprises a first flow regulating valve (471), a second flow regulating valve (472), and a third flow regulating valve (473); the first flow regulating valve (471) and the third flow regulating valve (473) are respectively connected to both ends of the second flow regulating valve (472); The first flow regulating valve (471) is connected to the first hydraulic mechanism, and the connection and disconnection between the oil tank (41) and the oil port of the cylinder (21) in the first hydraulic mechanism are achieved through the regulation of the first flow regulating valve (471); The third flow regulating valve (473) is connected to the second hydraulic mechanism, and the connection and disconnection between the oil tank (41) and the oil port of the cylinder (21) in the second hydraulic mechanism are achieved through the regulation of the third flow regulating valve (473); The connection and disconnection of the oil circuits in the accumulator (46) and the hydraulic motor (43) are achieved through the regulation of the second flow regulating valve (472).

3. The multifunctional load simulation and energy recovery device according to claim 2, characterized in that: The first flow regulating valve (471) is opened, and the oil port of the cylinder (21) in the first hydraulic mechanism is connected to the oil tank (41) through the second oil pipe (7); The third flow regulating valve (473) is opened, and the oil port of the cylinder (21) in the second hydraulic mechanism is connected to the oil tank (41) through the second oil pipe (7).

4. The multifunctional load simulation and energy recovery device according to claim 1, characterized in that: When an external force acts on the first hydraulic mechanism, the pressure in the cylinder (21) of the first hydraulic mechanism decreases, and the oil pressure in the cylinder (21) of the second hydraulic mechanism increases; In the first hydraulic mechanism, the hydraulically controlled one-way valve (44) is opened, and the oil in the oil tank (41) flows into the cylinder (21); In the second hydraulic mechanism, when the oil pressure in the cylinder (21) is greater than a predetermined value of the corresponding pressure valve (45), the oil flows into the accumulator (46) through the pressure valve (45), turning on the hydraulic motor (43), and the oil in the accumulator (46) flows into the oil tank (41) through the second oil pipe (7), driving the hydraulic motor (43) to output power; The rack (31) drives the gear (33) to rotate.

5. The multifunctional load simulation and energy recovery device according to claim 1, characterized in that: When an external force acts on the second hydraulic mechanism, the pressure in the cylinder (21) of the second hydraulic mechanism decreases, and the oil in the oil tank (41) flows into the second hydraulic mechanism; The oil pressure in the cylinder (21) of the first hydraulic mechanism increases, and the oil in the first hydraulic mechanism flows into the oil tank (41), driving the hydraulic motor (43) to output power; The rack (31) drives the gear (33) to rotate.

6. The multifunctional load simulation and energy recovery device according to claim 1, characterized in that: When the gear output shaft (32) rotates clockwise, the gear (33) drives the rack (31) to rotate, the pressure in the cylinder (21) of the first hydraulic mechanism decreases, and the oil in the oil tank (41) flows into the first hydraulic mechanism; the pressure in the cylinder (21) of the second hydraulic mechanism increases, and the oil in the second hydraulic mechanism flows into the oil tank (41); When the gear output shaft (32) rotates counterclockwise, the rack (31) drives the gear (33) to rotate, the pressure in the cylinder (21) in the second hydraulic mechanism decreases, and the oil in the oil tank (41) flows into the second hydraulic mechanism; the pressure in the cylinder (21) in the first hydraulic mechanism increases, and the oil in the first hydraulic mechanism flows into the oil tank (41).

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