Control Method, Device, Storage Medium and Processor for Variable Motor Displacement

Abstract

The embodiments of the present application provide a method, device, storage medium and processor for controlling the displacement of a variable motor. The method includes: when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure; when the load pressure is less than the force applied, controlling the hydraulic oil to flow from the accumulator to the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure; adjusting the pressure at the large end of the variable cylinder to a second pressure; controlling the variable piston to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure; and controlling the adjustment rod to move with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement. The adoption of this technical solution can maintain the variable motor at a large displacement, ensure the speed of the variable motor is stable, prevent vibration, and improve the safety of operation.

Description

Technical Field

[0001] The present application relates to the field of hydraulic control technology, and in particular to a method, device, storage medium, and processor for controlling variable motor displacement. Background Art

[0002] Currently, hydraulically controlled variable displacement motors with pressure cutoffs, when lifting heavy loads, can cause variations in motor displacement due to varying loads, making it impossible to consistently maintain a maximum displacement. Furthermore, during hydraulic control system operation, variations in motor speed and system pressure can cause high-frequency motor jitter, making stable motor operation impossible and compromising operator safety. Summary of the Invention

[0003] The purpose of the embodiments of the present application is to provide a method, device, storage medium and processor for controlling variable motor displacement.

[0004] To achieve the above-mentioned objectives, the present application provides, in a first aspect, a method for controlling the displacement of a variable motor, which is applied to a hydraulic control system of the variable motor displacement. The hydraulic control system includes a variable motor, a constant pressure shut-off valve, an accumulator, a variable cylinder, a variable piston, and an adjusting rod. The variable cylinder includes a small end and a large end of the variable cylinder, the small end of the variable cylinder is connected to the variable piston, a first end of the adjusting rod is connected to the variable piston, and a second end of the adjusting rod is connected to the variable motor. The control method includes:

[0005] When the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure;

[0006] When the load pressure is less than the applied force, the hydraulic oil is controlled to flow from the accumulator into the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure;

[0007] Adjusting the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure;

[0008] The variable piston is controlled to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure;

[0009] The control adjustment rod moves with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement.

[0010] In an embodiment of the present application, the big end of the variable cylinder is connected to the constant pressure cut-off valve, and adjusting the pressure of the big end of the variable cylinder to the second pressure includes: controlling the hydraulic oil to flow from the accumulator into the control chamber of the constant pressure cut-off valve so that the pressure of the control chamber is the first pressure; controlling the constant pressure cut-off valve to move to the target position under the push of the first pressure; controlling the sub-hydraulic oil in the constant pressure cut-off valve to flow into the big end of the variable cylinder, and determining the pressure of the sub-hydraulic oil to be the second pressure, wherein the sub-hydraulic oil refers to the hydraulic oil after the constant pressure cut-off valve is used up.

[0011] In an embodiment of the present application, the control method also includes: before controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at the first pressure, controlling the hydraulic oil to flow into the constant pressure cut-off valve so that the constant pressure cut-off valve moves to the target position under the push of the load pressure.

[0012] In an embodiment of the present application, the big end of the variable cylinder is connected to the constant pressure cut-off valve, and the control method also includes: when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, controlling the hydraulic oil to flow into the small end of the variable cylinder, and controlling the sub-hydraulic oil in the constant pressure cut-off valve to flow into the big end of the variable cylinder, so that the pressure applied to the small end of the variable cylinder is greater than the pressure applied to the big end of the variable cylinder; controlling the variable piston and the adjusting rod to move from the small end of the variable cylinder to the big end of the variable cylinder, so that the displacement of the variable motor is the target displacement.

[0013] In an embodiment of the present application, the hydraulic control system also includes a one-way throttle valve connected to the accumulator, and controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at the first pressure includes: controlling the hydraulic oil to flow through the one-way throttle valve and then flow into the accumulator so that the load pressure is maintained at the first pressure.

[0014] In an embodiment of the present application, the hydraulic control system further includes a flexible component, and the control method further includes: when the flexible component vibrates, determining that the load pressure is less than the applied force.

[0015] A second aspect of the present application provides a processor configured to execute the above-mentioned control method for variable motor displacement.

[0016] A third aspect of the present application provides a control device for variable motor displacement, comprising the above-mentioned processor.

[0017] A fourth aspect of the present application provides a hydraulic control system, comprising:

[0018] Variable motor, used to adjust the displacement by the adjusting rod;

[0019] A constant pressure cut-off valve is used to adjust the pressure at the large end of the variable cylinder to the second pressure;

[0020] an accumulator, configured to maintain the load pressure of the hydraulic oil at a first pressure;

[0021] A variable cylinder, including a variable cylinder small end and a variable cylinder large end;

[0022] The variable piston is connected to the small end of the variable cylinder and is used to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure;

[0023] an adjusting rod, wherein a first end of the adjusting rod is connected to the variable displacement piston, and a second end of the adjusting rod is connected to the variable displacement motor, and is used to move with the variable displacement piston to adjust the displacement of the variable displacement motor so that the displacement of the variable displacement motor reaches the target displacement; and

[0024] The above-mentioned control device for variable motor displacement.

[0025] A fifth aspect of the present application provides a machine-readable storage medium having instructions stored thereon, which, when executed by a processor, configure the processor to execute the above-mentioned control method for variable motor displacement.

[0026] The above technical solution controls the hydraulic oil to flow to the accumulator to maintain the load pressure of the hydraulic oil at a first pressure when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve; controls the hydraulic oil to flow from the accumulator to the small end of the variable cylinder to make the pressure at the small end equal to the first pressure when the load pressure is less than the force; adjusts the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure; controls the variable piston to move from the small end of the variable cylinder toward the large end of the variable cylinder under the push of the first pressure; and controls the adjustment rod to move with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement. This technical solution can maintain the variable motor at a large displacement, ensure the variable motor's speed is stable, and prevent vibration, thereby improving operational safety.

[0027] Other features and advantages of the embodiments of the present application will be described in detail in the subsequent detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the following detailed description, they are used to explain the embodiments of the present application but do not constitute a limitation on the embodiments of the present application. In the accompanying drawings:

[0029] Figure 1 The following schematically shows a flow chart of a method for controlling variable motor displacement according to an embodiment of the present application;

[0030] Figure 2 A schematic diagram of a hydraulic control system according to an embodiment of the present application is schematically shown;

[0031] Figure 3The internal structure diagram of a computer device according to an embodiment of the present application is schematically shown.

[0032] Reference numerals

[0033] 1. Accumulator 2. One-way throttle valve

[0034] 3. Pilot fluid control valve 4. Constant pressure cut-off valve

[0035] 5. First one-way valve 6. Second one-way valve

[0036] 7. Variable piston 8. Adjustment rod

[0037] 9. Variable motor 10. Variable cylinder DETAILED DESCRIPTION

[0038] To make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. It should be understood that the specific implementation methods described herein are only used to illustrate and explain the embodiments of the present application and are not used to limit the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0039] Figure 1 The flow chart of the control method for variable motor displacement according to the embodiment of the present application is schematically shown. Figure 1 As shown, in one embodiment of the present application, a method for controlling the displacement of a variable motor is provided, which is applied to a hydraulic control system of the variable motor displacement. The hydraulic control system includes a variable motor, a constant pressure cut-off valve, an accumulator, a variable cylinder, a variable piston, and an adjusting rod, wherein the variable cylinder includes a small end and a large end of the variable cylinder, the small end of the variable cylinder is connected to the variable piston, the first end of the adjusting rod is connected to the variable piston, and the second end of the adjusting rod is connected to the variable motor, comprising the following steps:

[0040] Step 101 : When the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force acting on the constant pressure cut-off valve, control the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure.

[0041] Step 102 : When the load pressure is less than the applied force, control the hydraulic oil to flow from the accumulator into the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure.

[0042] Step 103: Adjust the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure.

[0043] Step 104 , controlling the variable piston to move from the small end of the variable cylinder toward the large end of the variable cylinder under the push of the first pressure.

[0044] Step 105 : Control the adjusting rod to move along with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor reaches the target displacement.

[0045] A hydraulic control system is a mechanical system powered by an electric motor and using a hydraulic pump to convert mechanical energy into pressure, which then propels hydraulic fluid. A variable displacement motor is a hydraulic motor with a variable theoretical input displacement. It is often used in heavy-load, high-precision machinery such as cranes, and a regulator controls the displacement to meet predetermined requirements. A constant-pressure shut-off valve is a pressure-controlled valve that serves as the main valve in a hydraulic control system. An accumulator is an energy storage device in a hydraulic control system. It converts system energy into compression energy or potential energy at appropriate times and stores it. When needed, it releases the compressed energy or potential energy into hydraulic or pneumatic pressure, replenishing the system. When system pressure increases, the accumulator absorbs this energy to maintain normal system pressure. A variable displacement cylinder is a device that uses its motion to drive the swash plate to change angle, thereby varying flow. A variable displacement piston is a small hydraulic cylinder. An adjusting rod controls the displacement of a variable displacement motor by moving it up and down. Hydraulic oil is the hydraulic medium used in hydraulic systems that utilize liquid pressure energy. It plays a role in energy transmission, anti-wear, system lubrication, corrosion prevention, rust prevention, and cooling in hydraulic systems. Load pressure refers to the pressure carried by the hydraulic oil.

[0046] When the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force acting on the constant pressure shut-off valve, the processor can control the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure. When the load pressure of the hydraulic oil in the hydraulic control system is less than the force acting on the constant pressure shut-off valve, the processor can control the hydraulic oil to flow from the accumulator to the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure. The processor can adjust the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure. The processor can also control the variable piston to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure, and control the adjusting rod to move with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement.

[0047] In one embodiment, before controlling the hydraulic oil to flow to the accumulator to maintain the load pressure of the hydraulic oil at a first pressure, the hydraulic oil is controlled to flow into the constant pressure cut-off valve so that the constant pressure cut-off valve moves to a target position under the push of the load pressure.

[0048] Before controlling the flow of hydraulic oil to the accumulator to maintain the load pressure of the hydraulic oil at the first pressure, the processor may control the flow of hydraulic oil into the constant pressure cut-off valve so that the constant pressure cut-off valve moves to a target position under the load pressure. The target position refers to the farthest position to which the constant pressure cut-off valve can move under the load pressure.

[0049] In one embodiment, the large end of the variable cylinder is connected to the constant pressure cut-off valve, and adjusting the pressure of the large end of the variable cylinder to the second pressure includes: controlling the hydraulic oil to flow from the accumulator into the control chamber of the constant pressure cut-off valve so that the pressure of the control chamber is the first pressure; controlling the constant pressure cut-off valve to move to the target position under the push of the first pressure; controlling the sub-hydraulic oil in the constant pressure cut-off valve to flow into the large end of the variable cylinder, and determining the pressure of the sub-hydraulic oil to be the second pressure, wherein the sub-hydraulic oil refers to the hydraulic oil after the constant pressure cut-off valve is used up.

[0050] The large end of the variable cylinder is connected to a constant-pressure shut-off valve. The processor can control the flow of hydraulic oil from the accumulator into the control chamber of the constant-pressure shut-off valve, setting the pressure in the control chamber to a first pressure. The processor then controls the constant-pressure shut-off valve to move to a target position under the first pressure. The target position refers to the maximum position to which the constant-pressure shut-off valve can move under load pressure. The processor can control the flow of sub-hydraulic oil in the constant-pressure shut-off valve into the large end of the variable cylinder, setting the pressure of the sub-hydraulic oil to a second pressure. The sub-hydraulic oil refers to the hydraulic oil in the constant-pressure shut-off valve after use.

[0051] In one embodiment, the hydraulic control system further includes a flexible component, and the control method further includes: determining that the load pressure is less than the applied force when the flexible component vibrates. The flexible component refers to a longitudinal component, such as a winch wire rope, whose total bending resistance is weakened due to instability or other reasons.

[0052] The hydraulic control system also includes a flexible component. The flexible component refers to a longitudinal component whose ability to resist total bending is weakened due to instability or other reasons. For example, the flexible component can be a winch wire rope, etc. In the case of vibration of the flexible component, the processor can determine that the load pressure of the hydraulic oil in the hydraulic control system is less than the force acting on the constant pressure cut-off valve. In this case, the processor can further control the hydraulic oil to flow from the accumulator into the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure. The processor can adjust the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure. The processor can also control the variable piston to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure. And control the adjusting rod to move with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement.

[0053] In one embodiment, the large end of the variable cylinder is connected to the constant pressure cut-off valve, and the control method also includes: when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, controlling the hydraulic oil to flow into the small end of the variable cylinder, and controlling the sub-hydraulic oil in the constant pressure cut-off valve to flow into the large end of the variable cylinder, so that the pressure applied to the small end of the variable cylinder is greater than the pressure applied to the large end of the variable cylinder; controlling the variable piston and the adjusting rod to move from the small end of the variable cylinder to the large end of the variable cylinder, so that the displacement of the variable motor is the target displacement.

[0054] The large end of the variable cylinder is connected to a constant-pressure shut-off valve. When the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force acting on the constant-pressure shut-off valve, the processor can control the flow of hydraulic oil into the small end of the variable cylinder and the flow of the sub-hydraulic oil in the constant-pressure shut-off valve into the large end of the variable cylinder, so that the pressure on the small end of the variable cylinder is greater than the pressure on the large end of the variable cylinder. The processor can also control the variable piston and adjustment rod to move from the small end of the variable cylinder toward the large end of the variable cylinder, so that the displacement of the variable motor reaches the target displacement.

[0055] In one embodiment, the hydraulic control system further includes a one-way throttle valve connected to the accumulator, and controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at the first pressure includes: controlling the hydraulic oil to flow through the one-way throttle valve and then flow into the accumulator so that the load pressure is maintained at the first pressure.

[0056] The hydraulic control system further includes a one-way throttle valve connected to the accumulator. The processor can control the hydraulic oil to flow through the one-way throttle valve and then into the accumulator to maintain the load pressure at a first pressure. Specifically, when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure shut-off valve, the processor can control the hydraulic oil to flow through the one-way throttle valve and then into the accumulator to maintain the load pressure at the first pressure.

[0057] In one embodiment, Figure 2 As shown, a schematic diagram of a hydraulic control system is provided.

[0058] The hydraulic control system includes an accumulator 1. Hydraulic oil in the hydraulic control system can flow through a one-way throttle valve 2 and into the accumulator 1, maintaining the load pressure of the hydraulic oil at a first pressure. A pilot fluid control valve 3 controls the opening and closing of components in the hydraulic control system, such as a constant pressure shut-off valve 4. The constant pressure shut-off valve 4 is connected to the large end of the variable cylinder 10 and can adjust the pressure at the large end to a second pressure. A first one-way valve 5 and a second one-way valve 6 are used to prevent backflow of hydraulic oil in the hydraulic control system. A variable piston 7 can be connected to the small end of the variable cylinder 10 and the first end of an adjusting rod 8, respectively, and can drive the adjusting rod 8 from the small end to the large end. The first end of the adjusting rod 8 is connected to the variable piston 7, and the second end of the adjusting rod 8 is connected to the variable motor 9. The adjusting rod 8 can move with the variable piston 7 to adjust the displacement of the variable motor 9 to a target displacement. The displacement of the variable motor 9 can be adjusted by the adjusting rod 8 and operates at the adjusted target displacement.

[0059] When the load pressure P1 of the hydraulic oil in the hydraulic control system is greater than or equal to the force PW exerted on the constant pressure cut-off valve 4, the processor controls the hydraulic oil to flow to the accumulator 1 so that the load pressure P1 of the hydraulic oil is maintained at the first pressure P2. Specifically, the processor can control the hydraulic oil to flow through the one-way throttle valve 2 and then flow into the accumulator 1. The large end of the variable cylinder is connected to the constant pressure cut-off valve 4. When the load pressure P1 of the hydraulic oil in the hydraulic control system is greater than or equal to the force PW exerted on the constant pressure cut-off valve 4, the processor can control the hydraulic oil to flow into the small end of the variable cylinder. And control the sub-hydraulic oil in the constant pressure cut-off valve 4 to flow into the large end of the variable cylinder so that the pressure exerted on the small end of the variable cylinder is greater than the pressure exerted on the large end of the variable cylinder. The processor can also control the variable piston 7 and the adjusting rod 8 to move from the small end of the variable cylinder to the large end of the variable cylinder so that the displacement of the variable motor 9 is the target displacement.

[0060] The hydraulic control system also includes a flexible component. For example, the flexible component can be a winch wire rope. When the flexible component vibrates, the processor can determine that the load pressure P1 is less than the applied force PW. When the load pressure P1 is less than the applied force PW, the processor can control the hydraulic oil to flow out of the accumulator 1 after the one-way throttle valve 2 so that the pressure at the small end of the variable cylinder is equal to the first pressure P2. Specifically, the processor can control the first one-way valve 5 and the second one-way valve 6 to be locked, and can control the hydraulic oil to flow out of the accumulator 1, and after flowing through the one-way throttle valve 2, flow into the small end of the variable cylinder. The processor can adjust the pressure at the large end of the variable cylinder to the second pressure P0, wherein the first pressure P2 is greater than the second pressure P0.

[0061] Specifically, the large end of the variable cylinder is connected to the constant pressure cut-off valve 4, and the processor can control the hydraulic oil to flow from the accumulator 1 into the control chamber of the constant pressure cut-off valve 4 so that the pressure of the control chamber is the first pressure P2, and control the constant pressure cut-off valve 4 to move to the target position under the push of the first pressure P2. The processor can control the sub-hydraulic oil in the constant pressure cut-off valve 4 to flow into the large end of the variable cylinder, and determine the pressure of the sub-hydraulic oil to be the second pressure P0. The sub-hydraulic oil refers to the hydraulic oil after the constant pressure cut-off valve is used up. The processor can also control the variable piston 7 to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure P2. And control the adjusting rod 8 to move with the variable piston 7 to adjust the displacement of the variable motor 9 so that the displacement of the variable motor 9 is the target displacement.

[0062] The above technical solution controls the hydraulic oil to flow to the accumulator to maintain the load pressure of the hydraulic oil at a first pressure when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve; controls the hydraulic oil to flow from the accumulator to the small end of the variable cylinder to make the pressure at the small end equal to the first pressure when the load pressure is less than the force; adjusts the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure; controls the variable piston to move from the small end of the variable cylinder toward the large end of the variable cylinder under the push of the first pressure; and controls the adjustment rod to move with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement. This technical solution can maintain the variable motor at a large displacement, ensure the variable motor's speed is stable, and prevent vibration, thereby improving operational safety.

[0063] Figure 1 FIG. 1 is a flow chart of a method for controlling variable motor displacement in one embodiment. It should be understood that although Figure 1 The steps in the flowchart are shown in sequence as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified in this document, there is no strict order restriction for the execution of these steps, and these steps can be executed in other orders. In addition, Figure 1 At least part of the steps may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily executed at the same time, but can be executed at different times. The execution order of these sub-steps or stages is not necessarily sequential, but can be executed in turn or alternately with other steps or at least part of the sub-steps or stages of other steps.

[0064] An embodiment of the present application provides a processor, which is used to run a program, wherein the program executes the above-mentioned control method for variable motor displacement when it is run.

[0065] An embodiment of the present application provides a control device for variable motor displacement, including the above-mentioned processor.

[0066] The embodiment of the present application provides a hydraulic control system, comprising:

[0067] Variable motor, used to adjust the displacement by the adjusting rod;

[0068] A constant pressure cut-off valve is used to adjust the pressure at the large end of the variable cylinder to the second pressure;

[0069] an accumulator, configured to maintain the load pressure of the hydraulic oil at a first pressure;

[0070] A variable cylinder, including a variable cylinder small end and a variable cylinder large end;

[0071] The variable piston is connected to the small end of the variable cylinder and is used to move from the small end of the variable cylinder to the large end of the variable cylinder under the push of the first pressure;

[0072] an adjusting rod, wherein a first end of the adjusting rod is connected to the variable displacement piston, and a second end of the adjusting rod is connected to the variable displacement motor, and is used to move with the variable displacement piston to adjust the displacement of the variable displacement motor so that the displacement of the variable displacement motor reaches the target displacement; and

[0073] The above-mentioned control device for variable motor displacement.

[0074] In one embodiment, the large end of the variable cylinder can be connected to the constant pressure cut-off valve.

[0075] In one embodiment, the hydraulic control system further includes a one-way throttle valve connected to the accumulator; and a flexible assembly.

[0076] An embodiment of the present application provides a storage medium having a program stored thereon, which, when executed by a processor, implements the above-mentioned control method for variable motor displacement.

[0077] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 3As shown. The computer device includes a processor A01, a network interface A02, a memory (not shown in the figure) and a database (not shown in the figure) connected via a system bus. Among them, the processor A01 of the computer device is used to provide computing and control capabilities. The memory of the computer device includes an internal memory A03 and a non-volatile storage medium A04. The non-volatile storage medium A04 stores an operating system B01, a computer program B02 and a database (not shown in the figure). The internal memory A03 provides an environment for the operation of the operating system B01 and the computer program B02 in the non-volatile storage medium A04. The database of the computer device is used to store pressure and displacement data. The network interface A02 of the computer device is used to communicate with an external terminal through a network connection. When the computer program B02 is executed by the processor A01, a control method for variable motor displacement is implemented.

[0078] Those skilled in the art will understand that Figure 3 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0079] An embodiment of the present application provides a device, which includes a processor, a memory, and a program stored in the memory and executable on the processor. When the processor executes the program, the following steps are implemented: when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, the hydraulic oil is controlled to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure; when the load pressure is less than the force, the hydraulic oil is controlled to flow from the accumulator to the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure; the pressure at the large end of the variable cylinder is adjusted to a second pressure, wherein the first pressure is greater than the second pressure; the variable piston is controlled to move from the small end of the variable cylinder toward the large end of the variable cylinder under the push of the first pressure; and the adjusting rod is controlled to move with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor is the target displacement.

[0080] In one embodiment, the large end of the variable cylinder is connected to the constant pressure cut-off valve, and adjusting the pressure of the large end of the variable cylinder to the second pressure includes: controlling the hydraulic oil to flow from the accumulator into the control chamber of the constant pressure cut-off valve so that the pressure of the control chamber is the first pressure; controlling the constant pressure cut-off valve to move to the target position under the push of the first pressure; controlling the sub-hydraulic oil in the constant pressure cut-off valve to flow into the large end of the variable cylinder, and determining the pressure of the sub-hydraulic oil to be the second pressure, wherein the sub-hydraulic oil refers to the hydraulic oil after the constant pressure cut-off valve is used up.

[0081] In one embodiment, the control method further includes: before controlling the hydraulic oil to flow to the accumulator to maintain the load pressure of the hydraulic oil at the first pressure, controlling the hydraulic oil to flow into the constant pressure cut-off valve so that the constant pressure cut-off valve moves to the target position under the push of the load pressure.

[0082] In one embodiment, the large end of the variable cylinder is connected to the constant pressure cut-off valve, and the control method also includes: when the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, controlling the hydraulic oil to flow into the small end of the variable cylinder, and controlling the sub-hydraulic oil in the constant pressure cut-off valve to flow into the large end of the variable cylinder, so that the pressure applied to the small end of the variable cylinder is greater than the pressure applied to the large end of the variable cylinder; controlling the variable piston and the adjusting rod to move from the small end of the variable cylinder to the large end of the variable cylinder, so that the displacement of the variable motor is the target displacement.

[0083] In one embodiment, the hydraulic control system further includes a one-way throttle valve connected to the accumulator, and controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at the first pressure includes: controlling the hydraulic oil to flow through the one-way throttle valve and then flow into the accumulator so that the load pressure is maintained at the first pressure.

[0084] In one embodiment, the hydraulic control system further includes a flexible component, and the control method further includes: when the flexible component vibrates, determining that the load pressure is less than the applied force.

[0085] The present application also provides a computer program product which, when executed on a data processing device, is adapted to execute a program for initiating steps of a control method for variable motor displacement.

[0086] Those skilled in the art will appreciate that the embodiments of the present application can be provided as methods, systems, or computer program products. Therefore, the present application can adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0087] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0088] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0089] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0090] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0091] The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory in the form of read-only memory (ROM) or flash RAM. The memory is an example of a computer-readable medium.

[0092] Computer-readable media includes permanent and non-permanent, removable and non-removable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices or any other non-transmission media that can be used to store information that can be accessed by a computing device. As defined herein, computer-readable media does not include transitory computer-readable media (transitory media), such as modulated data signals and carrier waves.

[0093] It should also be noted that the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, commodity, or apparatus that includes a series of elements includes not only those elements but also other elements not explicitly listed, or includes elements inherent to such process, method, commodity, or apparatus. In the absence of further limitations, an element defined by the phrase "comprises a ..." does not exclude the presence of other identical elements in the process, method, commodity, or apparatus that includes the element.

[0094] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A method for controlling the displacement of a variable motor, characterized in that: A hydraulic control system for a variable displacement motor includes a variable displacement motor, a constant pressure shut-off valve, an accumulator, a variable displacement cylinder, a variable displacement piston, and an adjusting rod, wherein the variable displacement cylinder includes a small end and a large end, the small end of the variable displacement cylinder is connected to the variable displacement piston, a first end of the adjusting rod is connected to the variable displacement piston, and a second end of the adjusting rod is connected to the variable displacement motor. The control method includes: When the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure; When the load pressure is less than the acting force, controlling the hydraulic oil to flow from the accumulator into the small end of the variable cylinder so that the pressure at the small end of the variable cylinder is equal to the first pressure; adjusting the pressure at the large end of the variable cylinder to a second pressure, wherein the first pressure is greater than the second pressure; Controlling the variable piston to move from the small end of the variable cylinder toward the large end of the variable cylinder under the push of the first pressure; Controlling the adjusting rod to move along with the variable piston to adjust the displacement of the variable motor so that the displacement of the variable motor reaches the target displacement; The large end of the variable cylinder is connected to the constant pressure cut-off valve, and adjusting the pressure of the large end of the variable cylinder to the second pressure includes: controlling the hydraulic oil to flow from the accumulator into the control chamber of the constant pressure cut-off valve so that the pressure of the control chamber is the first pressure; controlling the constant pressure cut-off valve to move to a target position under the push of the first pressure; The sub-hydraulic oil in the constant pressure cut-off valve is controlled to flow into the large end of the variable cylinder, and the pressure of the sub-hydraulic oil is determined as the second pressure, wherein the sub-hydraulic oil refers to the hydraulic oil after the constant pressure cut-off valve is used up.

2. The method for controlling the displacement of a variable motor according to claim 1, wherein: The control method further includes: Before controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at the first pressure, the hydraulic oil is controlled to flow into the constant pressure cut-off valve so that the constant pressure cut-off valve moves to the target position under the push of the load pressure.

3. The method for controlling the displacement of a variable motor according to claim 1, wherein: The large end of the variable cylinder is connected to the constant pressure cut-off valve, and the control method further includes: When the load pressure of the hydraulic oil in the hydraulic control system is greater than or equal to the force applied to the constant pressure cut-off valve, the hydraulic oil is controlled to flow into the small end of the variable cylinder, and the sub-hydraulic oil in the constant pressure cut-off valve is controlled to flow into the large end of the variable cylinder, so that the pressure applied to the small end of the variable cylinder is greater than the pressure applied to the large end of the variable cylinder; The variable piston and the regulating rod are controlled to move from the small end of the variable cylinder toward the large end of the variable cylinder, so that the displacement of the variable motor is the target displacement.

4. The method for controlling the displacement of a variable motor according to claim 1, wherein: The hydraulic control system further includes a one-way throttle valve connected to the accumulator, and controlling the hydraulic oil to flow to the accumulator so that the load pressure of the hydraulic oil is maintained at a first pressure includes: The hydraulic oil is controlled to flow through the one-way throttle valve and then into the accumulator, so that the load pressure is maintained at the first pressure.

5. The method for controlling the displacement of a variable motor according to claim 1, wherein: The hydraulic control system further includes a flexible component, and the control method further includes: In the event that the flexible assembly vibrates, the load pressure is determined to be less than the applied force.

6. A processor, characterized in that: The method is configured to execute the control method for variable motor displacement according to any one of claims 1 to 5.

7. A control device for variable motor displacement, characterized in that: comprising a processor according to claim 6.

8. A hydraulic control system, characterized in that: include: Variable motor, used to adjust the displacement by the adjusting rod; A constant pressure cut-off valve is used to adjust the pressure at the large end of the variable cylinder to the second pressure; an accumulator, configured to maintain the load pressure of the hydraulic oil at a first pressure; A variable cylinder, including a variable cylinder small end and a variable cylinder large end; a variable piston connected to the small end of the variable cylinder and configured to move from the small end of the variable cylinder toward the large end of the variable cylinder under the push of the first pressure; an adjusting rod, a first end of which is connected to the variable displacement piston, and a second end of which is connected to the variable displacement motor, and is configured to move with the variable displacement piston to adjust the displacement of the variable displacement motor so that the displacement of the variable displacement motor reaches a target displacement; as well as The control device for a variable motor displacement according to claim 7.

9. A machine-readable storage medium having instructions stored thereon, characterized in that: When executed by a processor, the instructions cause the processor to be configured to perform the control method for variable motor displacement according to any one of claims 1 to 5.

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