Rapid oil supply system of hydraulic cylinder

Abstract

The utility model relates to the technical field of hydraulic cylinder equipment, in particular to a hydraulic cylinder rapid oil supply system which comprises a motor, a hydraulic pump, a first oil way and a second oil way. By arranging the first oil way, the unloading valve and the shuttle valve I are opened when the hydraulic system is used and the main cylinder and the rapid cylinder operate, so that pressure oil directly returns to an oil tank, and the pressure of an oil pump is reduced to be approximately zero, thereby realizing control of some loops, prolonging the service life of the oil pump, reducing power consumption and avoiding over-high temperature of hydraulic oil; due to the fact that the shuttle valve belongs to a straight stroke valve and is a valve integrating a valve body and an actuator, the shuttle valve is small in size and convenient to install, and due to the particularity of an internal piston structure, medium pressure almost has no more resistance interference on a piston, and therefore rapid opening and closing of the oil way are achieved, and pressure loss is small.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic cylinder equipment, in particular to a hydraulic cylinder rapid oil supply system. Background Art

[0002] The hydraulic cylinder is a hydraulic actuator that converts hydraulic energy into mechanical energy and performs linear reciprocating motion (or swinging motion). It has a simple structure and reliable operation. When it is used to achieve reciprocating motion, the deceleration device can be eliminated, and there is no transmission gap, and the motion is smooth, so it is widely used in the hydraulic systems of various machines. The output force of the hydraulic cylinder is proportional to the effective area of ​​the piston and the pressure difference on both sides; the hydraulic cylinder is basically composed of a cylinder barrel and a cylinder head, a piston and a piston rod, a sealing device, a buffer device and an exhaust device. The buffer device and the exhaust device depend on the specific application, and other devices are indispensable.

[0003] At present, the hydraulic system is used as the operating power source of the hydraulic operating mechanism of the hydraulic adjustable vane pump and the hydraulic operating valve. The hydraulic system has direct delivery type and pressure oil tank type. The former is a method of directly connecting the pressure oil pump and the operating equipment with a pressure oil pipe, which cannot be operated during a power outage.

[0004] However, the current hydraulic cylinder oil supply system, when the output end of the hydraulic cylinder moves quickly, the oil circuit pressure is high and the hydraulic oil flows too fast, which can easily lead to unstable oil circuit operation and excessively high temperature, which is not conducive to the operation of the hydraulic oil supply system. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and to provide a hydraulic cylinder rapid oil supply system to solve the technical problem in the prior hydraulic cylinder rapid oil supply system that when the output end of the hydraulic cylinder moves rapidly, the oil circuit pressure is high and the hydraulic oil flows too fast, which easily leads to unstable operation of the oil circuit and excessively high temperature, which is not conducive to the operation of the hydraulic oil supply system.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A hydraulic cylinder rapid oil supply system comprises: an electric motor, a hydraulic pump, a first oil circuit and a second oil circuit, wherein the first oil circuit comprises a master cylinder, a rapid cylinder, a balancing valve, an unloading valve, a reversing magnetic flux valve 1 and a shuttle valve 1, wherein the master cylinder is communicated with the rapid cylinder, the balancing valve is arranged between the reversing magnetic flux valve 1 and the oil circuit of the rapid cylinder, the unloading valve is arranged between the reversing magnetic flux valve 1 and the oil circuit of the master cylinder, and the shuttle valve 1 is arranged between the oil circuits of the balancing valve and the unloading valve.

[0008] Furthermore, the electric motor is drivingly connected to a hydraulic pump, and the first oil circuit and the second oil circuit share the electric motor and the hydraulic pump.

[0009] Further, the second oil circuit includes a reversing magnetic flux valve two, a hydraulic support, and a shuttle valve two. One end of the hydraulic support is communicated with the reversing magnetic flux valve two.

[0010] Further, the other end of the hydraulic support is communicated with the output oil inlet circuit of the hydraulic pump. One end of the shuttle valve two is communicated with one side input end of the reversing magnetic flux valve two. The other end of the shuttle valve two is communicated with the oil return circuit of the hydraulic system.

[0011] Advantages of the present utility model:

[0012] By providing a first oil circuit, during use, when the main cylinder and the fast cylinder are operating, the unloading valve and the shuttle valve one are opened, so that the pressure oil directly returns to the oil tank, the pressure of the oil pump drops to approximately zero, to achieve some circuit control, improve the service life of the oil pump, reduce power consumption, and avoid the temperature of the hydraulic oil from being too high, thereby making the oil circuit operation more stable. Since the shuttle valve belongs to a direct stroke valve, which is a valve integrating the valve body and the actuator, because of its small volume and convenient installation, and the special structure of the internal piston, the medium pressure has almost no more resistance interference on the piston, thus realizing the fast opening and closing of the oil circuit, with small pressure loss. At the same time, by using the balance valve, the pressure drop and flow rate can be accurately adjusted, which can improve the liquid flow state in the pipe network system, achieving the purpose of liquid balance and energy conservation in the oil circuit. Description of the Drawings

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic diagram of the oil circuit structure of the embodiment of the fast oil supply system of this hydraulic cylinder.

[0015] Explanation of the labels in the figure: 1. First oil circuit; 2. Balance valve; 3. Unloading valve; 4. Main cylinder; 5. Fast cylinder; 6. Motor; 7. Hydraulic pump; 8. Reversing magnetic flux valve one; 9. Shuttle valve one; 10. Reversing magnetic flux valve two; 11. Shuttle valve two; 12. Hydraulic support; 13. Second oil circuit. Detailed Embodiment

[0016] The following will combine the attachments in the embodiments of the present utility model Figure 1-1, the technical solutions in the embodiments of the present utility model are clearly and completely described. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0017] Please refer to Figure 1 As shown, a rapid oil supply system for a hydraulic cylinder includes: a motor 6, a hydraulic pump 7, a first oil circuit 1, and a second oil circuit 13. The first oil circuit 1 includes a main cylinder 4, a quick cylinder 5, a balance valve 2, an unloading valve 3, a first commutation magnetic flux valve 8, and a first shuttle valve 9. The main cylinder 4 communicates with the quick cylinder 5. The balance valve 2 is arranged between the oil circuit of the first commutation magnetic flux valve 8 and the quick cylinder 5. The unloading valve 3 is arranged between the oil circuit of the first commutation magnetic flux valve 8 and the main cylinder 4. The first shuttle valve 9 is arranged between the oil circuits of the balance valve 2 and the unloading valve 3.

[0018] Specifically, by providing the first oil circuit 1, during use, when the main cylinder 4 and the quick cylinder 5 are operating, the unloading valve 3 and the first shuttle valve 9 are opened, so that the pressure oil directly returns to the oil tank, the oil pump pressure drops to approximately zero, to achieve some circuit control, improve the service life of the oil pump, reduce power consumption, avoid the temperature of the hydraulic oil from being too high, and further make the oil circuit operate more stably. Since the shuttle valve belongs to a direct stroke valve, which is a valve integrating the valve body and the actuator, because of its small volume, convenient installation, and the special nature of the internal piston structure, the medium pressure has almost no more resistance interference on the piston, thus realizing the quick opening and closing of the oil circuit, with small pressure loss. At the same time, by using the balance valve 2, the pressure drop and flow rate can be accurately adjusted, which can improve the liquid flow state in the pipe network system, achieve the balance of the liquid in the oil circuit and the purpose of saving energy.

[0019] In this embodiment, the motor 6 is drivingly connected to the hydraulic pump 7. The first oil circuit 1 and the second oil circuit 13 share the motor 6 and the hydraulic pump 7.

[0020] Specifically, the motor 6 is used to drive the hydraulic pump 7, and the hydraulic pump 7 is used to drive the hydraulic oil.

[0021] The second oil circuit 13 includes a second commutation magnetic flux valve 10, a hydraulic support 12, and a second shuttle valve 11. One end of the hydraulic support 12 is communicated with the second commutation magnetic flux valve 10, the other end of the hydraulic support 12 is communicated with the output oil inlet circuit of the hydraulic pump 7, one end of the second shuttle valve 11 is communicated with one side input end of the second commutation magnetic flux valve 10, and the other end of the second shuttle valve 11 is communicated with the oil return circuit of the hydraulic system.

[0022] Specifically, during use, by using the second commutation magnetic flux valve 10, the opening and closing of the hydraulic support 12 can be controlled, and by using the second shuttle valve 11, the quick opening and closing of the oil circuit between the second commutation magnetic flux valve 10 and the hydraulic support 12 can be realized, with small pressure loss and high safety.

[0023] In summary, compared with the prior art, the oil supply system has at least the following beneficial effects: by providing the first oil circuit 1, during use, when the master cylinder 4 and the quick cylinder 5 are operating, the unloading valve 3 and the first shuttle valve 9 are opened, so that the pressure oil directly returns to the fuel tank, and the pump pressure drops to approximately zero, in order to achieve some circuit control, improve the pump life, reduce power consumption, and avoid excessive temperature of the hydraulic oil, thereby making the oil circuit operation more stable. Since the shuttle valve belongs to a direct stroke valve, which is a valve integrating the valve body and the actuator, due to its small volume and convenient installation, combined with the special internal piston structure, the medium pressure has almost no more resistance interference on the piston, thus realizing the quick opening and closing of the oil circuit with small pressure loss. At the same time, by using the balance valve 2, the pressure drop and flow rate can be accurately adjusted, which can improve the liquid flow state in the pipe network system and achieve the purpose of liquid balance and energy conservation in the oil circuit.

[0024] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hydraulic cylinder rapid oil supply system, characterized in that: include: An electric motor (6), a hydraulic pump (7), a first oil circuit (1) and a second oil circuit (13), wherein the first oil circuit (1) comprises a master cylinder (4), a fast cylinder (5), a balancing valve (2), an unloading valve (3), a reversing magnetic flux valve (8) and a shuttle valve (9), wherein the master cylinder (4) and the fast cylinder (5) are connected to each other, the balancing valve (2) is arranged between the reversing magnetic flux valve (8) and the oil circuit of the fast cylinder (5), the unloading valve (3) is arranged between the reversing magnetic flux valve (8) and the oil circuit of the master cylinder (4), and the shuttle valve (9) is arranged between the balancing valve (2) and the oil circuit of the unloading valve (3).

2. A hydraulic cylinder rapid oil supply system according to claim 1, characterized in that: The electric motor (6) is drivingly connected to the hydraulic pump (7), and the first oil circuit (1) and the second oil circuit (13) share the electric motor (6) and the hydraulic pump (7).

3. A hydraulic cylinder rapid oil supply system according to claim 2, characterized in that: The second oil circuit (13) comprises a second reversing magnetic flux valve (10), a hydraulic support (12) and a second shuttle valve (11); one end of the hydraulic support (12) is in communication with the second reversing magnetic flux valve (10).

4. A hydraulic cylinder rapid oil supply system according to claim 3, characterized in that: The other end of the hydraulic strut (12) is connected to the output oil inlet of the hydraulic pump (7), one end of the shuttle valve 2 (11) is connected to one side input end of the reversing magnetic flux valve 2 (10), and the other end of the shuttle valve 2 (11) is connected to the return oil circuit of the hydraulic system.

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