A hydraulic system with high-low pressure switching energy-saving function

Abstract

This application relates to the field of hydraulic system technology, specifically to a hydraulic system with high / low pressure switching and energy-saving function. It includes a first pressure oil input port and a second pressure oil input port, which are used to connect to a hydraulic pump; a first electromagnetic relief valve and a second electromagnetic relief valve, whose inlet ends are connected to the first and second pressure oil input ports; a first check valve and a second check valve, whose inlet ends are connected to the first and second pressure oil input ports, and whose outlet ends are connected to an output port; a pressure sensor, which is installed on the connecting pipeline between the output port and the first and second check valves; and a return oil port. This application can automatically switch between high and low pressure according to load requirements, using low pressure operation when the load is low and high pressure operation when the load is high, avoiding excessive energy consumption and waste caused by the hydraulic system, and significantly reducing operating costs compared to traditional hydraulic systems.

Description

Technical Field

[0001] This application relates to the technical field of hydraulic systems with high and low pressure switching energy-saving function, and particularly to a hydraulic system with high and low pressure switching energy-saving function. Background Technology

[0002] The hydraulic system has a significant energy loss problem in pressure output control. This is mainly manifested in the fact that the system continues to supply oil through the high-pressure oil pump during non-working cycles or low-pressure demand periods, resulting in a large amount of energy being lost as heat through the relief valve.

[0003] Existing technologies typically employ a single pressure source with constant pressure control, which cannot dynamically adjust the oil supply pressure according to load demands. This is especially problematic under cyclic high-pressure impact conditions, where the system remains in a high-pressure overflow state for extended periods, resulting in a high proportion of ineffective pump power. This project aims to develop a hydraulic system with high-low pressure switching and energy-saving functionality to address these issues. Utility Model Content

[0004] In view of at least one of the above technical problems, this application provides a hydraulic system with high and low pressure switching energy-saving function, and adopts the following technical solution to solve the above problems.

[0005] According to one aspect of this application, a hydraulic system with high / low pressure switching and energy-saving function is provided, comprising:

[0006] The first pressure oil input port and the second pressure oil input port are used to connect to the hydraulic pump.

[0007] The first electromagnetic relief valve and the second electromagnetic relief valve have their inlet ends connected to the pressure oil input port and the second pressure oil input port;

[0008] The first check valve and the second check valve have their inlet ends connected to the pressure oil input port and the second pressure oil input port, and their outlet ends connected to the output port.

[0009] A pressure sensor is installed on the connection line between the output port and the first check valve and the second check valve;

[0010] The oil return port is connected to the outlet of the first and second electromagnetic relief valves.

[0011] Preferably, the first electromagnetic relief valve and the second electromagnetic relief valve correspond to the low-pressure relief and high-pressure maintenance functions, respectively.

[0012] Preferably, the first electromagnetic relief valve and the second electromagnetic relief valve are connected to the return oil port through independent pipelines to form a switchable pressure relief channel.

[0013] Preferably, the first check valve and the second check valve are used to prevent high-pressure oil from flowing backward from the output port.

[0014] Preferably, the opening degree of the first electromagnetic relief valve and the second electromagnetic relief valve is dynamically adjusted by the controller based on the feedback signal from the pressure sensor.

[0015] Preferably, the controller has a built-in PID control module, which is used to adjust the response of the first electromagnetic relief valve and the second electromagnetic relief valve in real time according to the pressure fluctuations at the output port.

[0016] Preferably, the first pressure oil input port and the second pressure oil input port are connected in parallel, corresponding to the low-pressure and high-pressure oil inlet pipelines respectively.

[0017] Preferably, a redundant pressure balance channel is provided between the first pressure oil input port and the second pressure oil input port, which is used to automatically restore the oil supply to the first pressure oil input port when the oil supply from the second pressure oil input port is abnormal.

[0018] This application has the following technical effects:

[0019] This application can automatically switch between high and low pressure according to load requirements. It operates at low pressure when the load is small and at high pressure when the load is large, thus avoiding excessive energy consumption of the hydraulic system and significantly reducing operating costs compared to traditional hydraulic systems. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a system architecture diagram of this application.

[0022] Figure label:

[0023] 1. First pressure oil input port; 2. Second pressure oil input port; 3. First check valve; 4. Second check valve; 5. Pressure sensor; 6. Output port; 7. Return oil port; 8. First solenoid relief valve; 9. Second solenoid relief valve. Detailed Implementation

[0024] Please see Figure 1It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and objectives of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the technical terms used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0025] First, let me explain the original design intention of this invention: Traditional hydraulic systems have significant energy loss problems in pressure output control, mainly manifested in the fact that during non-working cycles or low-pressure demand phases, the system continues to supply oil through the high-pressure oil pump, resulting in a large amount of energy being lost as heat through the relief valve.

[0026] Existing technologies typically employ a single pressure source combined with constant pressure control, which cannot dynamically adjust the oil supply pressure according to load requirements. Especially under periodic high-pressure impact conditions, the system is in a high-pressure overflow state for a long time, resulting in a high proportion of ineffective power of the oil pump.

[0027] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this application.

[0028] In this embodiment of the application, as Figure 1 As shown, a hydraulic system with high / low pressure switching and energy-saving function is provided, comprising:

[0029] First pressure oil input port 1 and second pressure oil input port 2 are used to connect to a hydraulic pump;

[0030] The first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 are connected at their inlet ends to the pressure oil input port 1 and the second pressure oil input port 2.

[0031] The first check valve 3 and the second check valve 4 are connected to the pressure oil input port 1 and the second pressure oil input port 2 at their inlet ends, and to the output port 6 at their outlet ends.

[0032] Pressure sensor 5 is installed on the connecting pipeline between output port 6 and first check valve 3 and second check valve 4;

[0033] Oil return port 7 is connected to the outlet end of the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9.

[0034] It should be noted that during system operation, the first pressure oil input port 1 and the second pressure oil input port 2 are connected in parallel to the low-pressure and high-pressure oil inlet pipelines, respectively connected to the low-pressure and high-pressure oil output from the hydraulic pump. When the system load is low, low-pressure oil enters through the first pressure oil input port 1, the first check valve 3 is open, and the oil flows to the output port 6. The pressure sensor 5 monitors the output pressure in real time. If the pressure exceeds the low-pressure set value, the controller receives the feedback signal from the pressure sensor 5 and controls the first solenoid relief valve 8 to open, and the excess oil is discharged through its independent pipeline via the return oil port 7, maintaining low-pressure stability. When the system load increases and high-pressure oil is required, high-pressure oil enters through the second pressure oil input port 2, the second check valve 4 is open, and the oil flows to the output port 6. At this time, the second solenoid relief valve 9 maintains the system high pressure. During operation, the pressure sensor 5 continuously monitors the pressure and feeds it back to the controller. The controller adjusts the opening of the first solenoid relief valve 8 and the second solenoid relief valve 9 according to the pressure fluctuation using the built-in PID control module. For example, when the pressure approaches the high-pressure setpoint, the opening of the first electromagnetic relief valve 8 is reduced to decrease low-pressure relief, while the state of the second electromagnetic relief valve 9 is maintained to ensure high-pressure output; when the pressure drops, the openings of both are adjusted to replenish the pressure. In addition, if the oil supply to the second pressure oil input port 2 is abnormal, the redundant pressure balance channel automatically opens, and the oil supply to the first pressure oil input port 1 is restored to ensure continuous system operation.

[0035] In one embodiment of this application, the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 correspond to low-pressure relief and high-pressure maintenance functions, respectively.

[0036] It should be noted that the first electromagnetic relief valve 8 corresponds to the low-pressure relief function. During the initial operation of the system or when the load is small, low-pressure oil enters the system through the first pressure oil input port 1. When the pressure exceeds the low-pressure set value, the first electromagnetic relief valve 8 opens, discharging excess oil through the return oil port 7, thus stabilizing the system pressure within the low-pressure operating range. This prevents the low-pressure pump from operating under high pressure, reducing energy consumption. The second electromagnetic relief valve 9 corresponds to the high-pressure maintenance function. When the system load increases, high-pressure oil enters the system through the second pressure oil input port 2. The second electromagnetic relief valve 9 maintains the system high pressure, ensuring sufficient pressure at the output port 6 to drive the load, thus meeting different pressure control requirements under high and low pressure conditions.

[0037] In one embodiment of this application, the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 are respectively connected to the return oil port 7 through independent pipelines to form a switchable pressure relief channel.

[0038] It should be noted that the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 are each connected to the return oil port 7 via independent pipelines. This connection method forms a switchable pressure relief channel. Under low-pressure conditions, the first electromagnetic relief valve 8 opens, relieving pressure through its independent pipeline; under high-pressure conditions, if an abnormal pressure occurs and pressure relief is required, the second electromagnetic relief valve 9 can relieve pressure through its own independent pipeline. These independent connections ensure that the system can safely and effectively relieve pressure under different pressure conditions, improving the system's reliability and stability.

[0039] In one embodiment of this application, the first check valve 3 and the second check valve 4 are used to prevent high-pressure oil from flowing in the reverse direction from the output port 6.

[0040] It should be noted that in the hydraulic system, high-pressure oil flows from the first pressure oil input port 1 and the second pressure oil input port 2 through the first check valve 3 and the second check valve 4 to the output port 6. The one-way conduction characteristics of the first check valve 3 and the second check valve 4 prevent the high-pressure oil from flowing backward from the output port 6, which can avoid the problems of unstable system pressure and component damage caused by oil backflow, and ensure the normal operation and safety of the system.

[0041] In one embodiment of this application, the opening degree of the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 is dynamically adjusted by the controller based on the feedback signal from the pressure sensor 5.

[0042] It should be noted that the pressure sensor 5 monitors the pressure at the output port 6 in real time and feeds the pressure signal back to the controller. The controller dynamically adjusts the opening of the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 according to the feedback signal. For example, when the pressure is close to the high pressure set value, the controller reduces the opening of the first electromagnetic relief valve 8 to reduce low pressure relief, while maintaining the state of the second electromagnetic relief valve 9 to ensure stable high pressure output. When the pressure drops, the controller adjusts the opening of both valves according to the actual situation to achieve dynamic pressure stability and energy-saving operation.

[0043] In one embodiment of this application, the controller has a built-in PID control module for adjusting the response of the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 in real time according to the pressure fluctuation of the output port 6.

[0044] It should be noted that the built-in PID control module of the controller can adjust the response of the first electromagnetic relief valve 8 and the second electromagnetic relief valve 9 in real time according to the pressure fluctuations at the output port 6. When the pressure fluctuates significantly, the PID control module quickly calculates and precisely adjusts the two electromagnetic relief valves to make them act quickly and stabilize the pressure. During the high-pressure maintenance phase, if the pressure drops slightly, the PID control module controls the second electromagnetic relief valve 9 to fine-tune its opening to replenish the pressure. At the same time, it adjusts the first electromagnetic relief valve 8 appropriately as needed to prevent excessive pressure fluctuations. Through precise control algorithms, high efficiency, energy saving, and stable operation are achieved.

[0045] In one embodiment of this application, the first pressure oil input port 1 and the second pressure oil input port 2 are connected in parallel, corresponding to the low-pressure and high-pressure oil inlet pipelines, respectively.

[0046] It should be noted that the first pressure oil input port 1 and the second pressure oil input port 2 are connected in parallel, corresponding to the low-pressure and high-pressure oil inlet lines respectively. This parallel connection allows the system to flexibly select between low-pressure and high-pressure oil input according to actual working needs. Low-pressure oil is used when the load is small to reduce energy consumption; when the load increases, it switches to high-pressure oil to meet working requirements, laying the foundation for the energy-saving function of high-low pressure switching.

[0047] In one embodiment of this application, a redundant pressure balance channel is provided between the first pressure oil input port 1 and the second pressure oil input port 2, which is used to automatically restore the oil supply to the first pressure oil input port 1 when the oil supply of the second pressure oil input port 2 is abnormal.

[0048] It should be noted that a redundant pressure balancing channel is provided between the first pressure oil input port 1 and the second pressure oil input port 2. When the second pressure oil input port 2 experiences an oil supply abnormality, such as a pressure drop caused by a high-pressure pump failure, the redundant pressure balancing channel will automatically open, and the first pressure oil input port 1 can automatically resume supplying oil to the system, ensuring the system continues to operate. This design improves the reliability of the system, avoids production interruptions due to abnormal high-pressure oil supply, and reduces losses.

[0049] The above are merely preferred embodiments of this application and do not constitute any limitation on this application. Any person skilled in the art can make many possible variations and modifications to the technical solution of this application, or modify it into equivalent embodiments, without departing from the scope of the technical solution of this application. Therefore, all equivalent changes made based on the shape, structure, and principle of this application without departing from the content of the technical solution of this application should be covered within the protection scope of this application.

Claims

1. A hydraulic system with high-low pressure switching energy saving function, characterized in that, include: The first pressure oil input port (1) and the second pressure oil input port (2) are used to connect to the hydraulic pump. The first electromagnetic relief valve (8) and the second electromagnetic relief valve (9) are connected at their inlet ends to the pressure oil input port (1) and the second pressure oil input port (2). The first check valve (3) and the second check valve (4) are connected at their inlet ends to the pressure oil input port (1) and the second pressure oil input port (2), and at their outlet ends to the output port (6). A pressure sensor (5) is disposed on the connecting pipe between the output port (6) and the first check valve (3) and the second check valve (4); Oil return port (7) is connected to the outlet end of the first electromagnetic overflow valve (8) and the second electromagnetic overflow valve (9).

2. The hydraulic system with high-low pressure switching energy saving function according to claim 1, characterized in that: The first electromagnetic relief valve (8) and the second electromagnetic relief valve (9) correspond to the low-pressure relief and high-pressure maintenance functions, respectively.

3. The hydraulic system with high-low pressure switching energy saving function according to claim 1, characterized in that: The first electromagnetic relief valve (8) and the second electromagnetic relief valve (9) are respectively connected to the return oil port (7) through independent pipelines to form a switchable pressure relief channel.

4. The hydraulic system with high-low pressure switching energy saving function according to claim 1, characterized in that: The first check valve (3) and the second check valve (4) are used to prevent high-pressure oil from flowing in the reverse direction from the output port (6).

5. The hydraulic system with high-low pressure switching energy saving function according to claim 1, characterized in that: The opening degree of the first electromagnetic relief valve (8) and the second electromagnetic relief valve (9) is dynamically adjusted by the controller according to the feedback signal of the pressure sensor (5).

6. The hydraulic system with high-low pressure switching energy saving function according to claim 5, characterized in that: The controller has a built-in PID control module, which is used to adjust the response of the first electromagnetic relief valve (8) and the second electromagnetic relief valve (9) in real time according to the pressure fluctuation of the output port (6).

7. A hydraulic system with high / low pressure switching and energy-saving function according to claim 1, characterized in that: The first pressure oil input port (1) and the second pressure oil input port (2) are connected in parallel, corresponding to the low-pressure and high-pressure oil inlet pipelines respectively.

8. The hydraulic system with high-low pressure switching energy saving function according to claim 1, characterized in that: A redundant pressure balance channel is provided between the first pressure oil input port (1) and the second pressure oil input port (2) to automatically restore the oil supply of the first pressure oil input port (1) when the oil supply of the second pressure oil input port (2) is abnormal.

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