阅读说明：本技术 一种变排量液压马达控制系统 (Variable displacement hydraulic motor control system ) 是由 米月星 江辉军 白凡玉 李高磊 于 2020-12-29 设计创作，主要内容包括：本发明提供一种变排量液压马达控制系统,所述系统包括控制单元(1)、油滤(2)、电磁阀(3)、开关阀(4)、电液伺服阀(5)、斜盘控制活塞(6)、限流阀(7)、变量液压马达(8)和旋转运动机构；其中：电液伺服阀第一端(51)与控制单元(1)的一端连接；控制单元(1)的另一端与电磁阀第一端(31)连接；电磁阀第二端(32)、开关阀第一端(41)均通过油滤(2)与供油源连接；电磁阀第三端(33)、电液伺服阀第二端(52)均与与回油油箱连接；电磁阀第四端(34)与开关阀第二端(42)连接,开关阀第三端(43)与电液伺服阀第三端(53)连接；电液伺服阀第三端通过限流阀(7)与变量液压马达(8)连接。(The invention provides a variable displacement hydraulic motor control system, which comprises a control unit (1), an oil filter (2), an electromagnetic valve (3), a switch valve (4), an electro-hydraulic servo valve (5), a swash plate control piston (6), a flow limiting valve (7), a variable hydraulic motor (8) and a rotary motion mechanism, wherein the oil filter is arranged on the oil filter; wherein: the first end (51) of the electro-hydraulic servo valve is connected with one end of the control unit (1); the other end of the control unit (1) is connected with a first end (31) of the electromagnetic valve; the second end (32) of the electromagnetic valve and the first end (41) of the switch valve are both connected with an oil supply source through an oil filter (2); the third end (33) of the electromagnetic valve and the second end (52) of the electro-hydraulic servo valve are both connected with an oil return tank; the fourth end (34) of the electromagnetic valve is connected with the second end (42) of the switch valve, and the third end (43) of the switch valve is connected with the third end (53) of the electro-hydraulic servo valve; the third end of the electro-hydraulic servo valve is connected with a variable hydraulic motor (8) through a flow limiting valve (7).)

1. A variable displacement hydraulic motor control system is characterized by comprising a control unit (1), an oil filter (2), an electromagnetic valve (3), a switch valve (4), an electro-hydraulic servo valve (5), a swash plate control piston (6), a flow limiting valve (7), a variable hydraulic motor (8) and a rotary motion mechanism; the electromagnetic valve (3) comprises an electromagnetic valve first end (31), an electromagnetic valve second end (32), an electromagnetic valve third end (33) and an electromagnetic valve fourth end (34); the electro-hydraulic servo valve (5) comprises an electro-hydraulic servo valve first end (51), an electro-hydraulic servo valve second end (52), an electro-hydraulic servo valve third end (53), an electro-hydraulic servo valve fourth end (54) and an electro-hydraulic servo valve fifth end (55); the switching valve (4) comprises a switching valve first end (41), a switching valve second end (42) and a switching valve third end (43), wherein:

the first end (51) of the electro-hydraulic servo valve is connected with one end of the control unit (1); the other end of the control unit (1) is connected with a first end (31) of the electromagnetic valve; the second end (32) of the electromagnetic valve and the first end (41) of the switch valve are both connected with an oil supply source through an oil filter (2); the third end (33) of the electromagnetic valve and the second end (52) of the electro-hydraulic servo valve are both connected with an oil return tank; the fourth end (34) of the electromagnetic valve is connected with the second end (42) of the switch valve, and the third end (43) of the switch valve is connected with the third end (53) of the electro-hydraulic servo valve; the third end of the electro-hydraulic servo valve is connected with a variable hydraulic motor (8) through a flow limiting valve (7); two ends of a swash plate of the variable hydraulic motor (8) are respectively provided with a swash plate control piston (6); the fourth end (54) and the fifth end (55) of the electro-hydraulic servo valve are respectively connected with the swash plate control pistons (6) at the two ends of the swash plate; the variable hydraulic motor (8) is also connected with an oil return tank, and the variable hydraulic motor (8) is connected with a rotary motion mechanism.

2. System according to claim 1, characterized in that the control unit (1) is adapted to send control commands to the electro-hydraulic servo valve (5) and the solenoid valve (3).

3. The system of claim 2, wherein the control commands are used to control the swash plate of the variable displacement motor to oscillate at positive and negative angles and to control the direction of motor rotation.

4. A system according to claim 1, characterized in that the oil filter (2) is adapted to filter out contaminating impurities of the hydraulic oil.

5. The system according to claim 1, characterized in that the solenoid valve (3) and the on-off valve (4) are used for controlling the on-off of the oil circuit.

6. A system according to claim 1, characterized in that the electro-hydraulic servo valve (5) controls the flow into the swash plate control piston (6) and thereby the swash plate angle of the variable displacement hydraulic motor (8).

7. A system according to claim 6, characterized in that the displacement of the variable displacement hydraulic motor (8) and thereby the motor direction of rotation is controlled by adjusting the swash plate angle of the variable displacement hydraulic motor (8).

8. A system according to claim 1, characterized in that the positive and negative rotation of the variable displacement hydraulic motor (8) is effected by controlling the positive and negative angle of the swash plate of the variable displacement hydraulic motor (8).

Technical Field

The invention belongs to an aircraft electromechanical system, and relates to a variable displacement hydraulic motor control system.

Background

Compared with a constant-displacement hydraulic motor control system, the variable-displacement control system can greatly improve the system efficiency, reduce the power consumption and has high response speed;

the current variable displacement hydraulic motor reversing control is controlled by an electro-hydraulic reversing valve, so a large-flow electro-hydraulic reversing valve must be connected in series on a main oil path of the motor, oil supply of a hydraulic source must pass through the electro-hydraulic reversing valve to supply pressure to the motor, and the efficiency of a variable displacement motor control system has to be greatly reduced due to the large flow resistance of the electro-hydraulic reversing valve. In a high-power control system, the development difficulty of the electro-hydraulic reversing valve is greatly increased due to the large system flow.

Disclosure of Invention

In order to overcome the defects of the existing hydraulic motor control method, the invention provides a variable displacement hydraulic motor control system which can improve the efficiency of the variable displacement hydraulic motor control system.

The invention provides a variable displacement hydraulic motor control system, which comprises a control unit (1), an oil filter (2), an electromagnetic valve (3), a switch valve (4), an electro-hydraulic servo valve (5), a swash plate control piston (6), a flow limiting valve (7), a variable hydraulic motor (8) and a rotary motion mechanism, wherein the oil filter is arranged on the oil filter; the electromagnetic valve (3) comprises an electromagnetic valve first end (31), an electromagnetic valve second end (32), an electromagnetic valve third end (33) and an electromagnetic valve fourth end (34); the electro-hydraulic servo valve (5) comprises an electro-hydraulic servo valve first end (51), an electro-hydraulic servo valve second end (52), an electro-hydraulic servo valve third end (53), an electro-hydraulic servo valve fourth end (54) and an electro-hydraulic servo valve fifth end (55); the switching valve (4) comprises a switching valve first end (41), a switching valve second end (42) and a switching valve third end (43), wherein:

the first end (51) of the electro-hydraulic servo valve is connected with one end of the control unit (1); the other end of the control unit (1) is connected with a first end (31) of the electromagnetic valve; the second end (32) of the electromagnetic valve and the first end (41) of the switch valve are both connected with an oil supply source through an oil filter (2); the third end (33) of the electromagnetic valve and the second end (52) of the electro-hydraulic servo valve are both connected with an oil return tank; the fourth end (34) of the electromagnetic valve is connected with the second end (42) of the switch valve, and the third end (43) of the switch valve is connected with the third end (53) of the electro-hydraulic servo valve; the third end of the electro-hydraulic servo valve is connected with a variable hydraulic motor (8) through a flow limiting valve (7); two ends of a swash plate of the variable hydraulic motor (8) are respectively provided with a swash plate control piston (6); the fourth end (54) and the fifth end (55) of the electro-hydraulic servo valve are respectively connected with the swash plate control pistons (6) at the two ends of the swash plate; the variable hydraulic motor (8) is also connected with an oil return tank, and the variable hydraulic motor (8) is connected with a rotary motion mechanism.

Specifically, the control unit (1) is used for sending control commands to the electro-hydraulic servo valve (5) and the electromagnetic valve (3).

Specifically, the control command is used for controlling the swash plate of the variable displacement motor to swing at positive and negative angles and controlling the rotation direction of the motor.

Specifically, the oil filter (2) is used for filtering out the pollution impurities of the hydraulic oil.

Specifically, the electromagnetic valve (3) and the switch valve (4) are used for controlling the on-off of an oil path.

Specifically, the electro-hydraulic servo valve (5) controls the flow into the swash plate control piston (6) to control the swash plate angle of the variable displacement hydraulic motor (8).

Specifically, the displacement of the variable displacement hydraulic motor (8) is controlled by adjusting the angle of a swash plate of the variable displacement hydraulic motor (8), so that the rotation direction of the motor is controlled.

Specifically, the positive and negative rotation of the variable hydraulic motor (8) is realized by controlling the positive and negative angles of a swash plate of the variable hydraulic motor (8).

In summary, the present invention provides a variable displacement hydraulic motor control system, which has the following advantages: 1. the efficiency is greatly improved, and compared with the current variable displacement control method, the efficiency can be improved by about 50 percent; 2. the reversing control of a large-flow hydraulic motor system can be realized by adopting the small-flow electro-hydraulic reversing valve.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

FIG. 1 is a schematic structural diagram of a variable displacement hydraulic motor control system provided by the present application;

wherein: 1-control unit, 2-oil filter, 3-electromagnetic valve, 4-switch valve, 5-electrohydraulic servo valve, 6-sloping cam plate piston, 7, flow limiting valve, 8 and variable hydraulic motor.

Detailed Description

In order to make the implementation objects, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the control method of the variable displacement hydraulic motor of the present invention includes a control unit, an oil filter, an electromagnetic valve, a switch valve, an electro-hydraulic servo valve, a swash plate control piston, a flow limiting valve, and the like.

The technical scheme adopted by the invention is as follows: the swash plate of the variable displacement motor can swing at positive and negative angles according to a control command, the variable displacement motor is a bidirectional variable displacement motor, the displacement and the rotating direction of the motor can be controlled, and the rotating direction and the displacement of the motor are controlled by a method of controlling pistons through a small-flow servo valve and the swash plate.

The control operation of the present invention will be described with reference to fig. 1.

The oil filter is used for filtering pollution impurities of hydraulic oil, the electromagnetic valve and the switch are used for controlling the on-off of an oil path, high-pressure oil supply is divided into two paths after passing through the oil filter, the electromagnetic valve and the switch valve, one path of high-pressure oil supply flows to the hydraulic motor through the flow limiting valve, the flow limiting valve is used for limiting the input flow of the motor, and the other path of high-pressure oil supply flows to the swash plate control piston through the electro-hydraulic. The displacement of the motor is adjusted by adjusting the angle of a swash plate of the motor, and the electro-hydraulic servo valve controls the flow entering the swash plate to control the piston, so that the angle of the swash plate of the variable displacement motor is controlled. The positive and negative rotation of the hydraulic motor is realized by controlling the positive and negative angles of the swash plate.

The above description is only for the best mode of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.