Passive electric control brake valve with large oil discharge quantity

Abstract

A passive electric control brake valve with a large oil discharge amount comprises a brake valve body, a controller assembly, a direct-current motor, a support assembly and a pressure sensor, the brake valve body, the controller assembly and the direct-current motor are installed on the support assembly, the brake valve body and the direct-current motor are located on the two sides of the support assembly respectively, a ball screw is arranged on the direct-current motor, and the pressure sensor is arranged on the ball screw. The ball screw is sleeved with a ball nut, the ball nut and the ejector rod are connected through a screw and then connected with the brake valve, the direct-current motor is electrically connected with the controller assembly, the controller assembly controls the direct-current motor to work, the brake valve comprises a shell, a piston assembly, an end cover, an oil storage cup and an oil cup cover, and the piston assembly is installed in the shell. The piston assembly is in close fit with an inner cavity of the shell and can slide in the shell, the piston assembly comprises a large piston and a small piston, a small hydraulic cavity is formed in a large hydraulic cavity formed between the large piston and the shell, the small piston is arranged in the small hydraulic cavity in a sliding mode, and the pressure sensor is electrically connected with the controller assembly.

Description

Technical Field

[0001] The invention relates to the technical field of aircraft brakes, and in particular to a passive electric-controlled brake valve with a large oil displacement. Background Art

[0002] Passive electronically controlled brake valves are an important part of aircraft take-off and landing systems. Compared with traditional electronically controlled brake valves, large-displacement passive electronically controlled brake valves have obvious advantages such as simple structure, high reliability, good economy, large oil displacement, and high matching. The use of large-displacement passive electronically controlled brake valves is the development direction of aircraft brake technology. The maximum oil displacement of existing electronically controlled brake valves is 9.2ml, which cannot match wheel brake devices that require more oil displacement. Summary of the invention

[0003] In order to solve the problems mentioned in the above background technology, the present invention provides a passive electric-controlled brake valve with a large oil discharge volume.

[0004] The invention discloses the following technical scheme: a passive electric-controlled brake valve with a large oil displacement, comprising a brake valve, a controller component, a DC motor, a support component and a pressure sensor, wherein the brake valve, the controller component and the DC motor are mounted on the support component, the brake valve and the DC motor are respectively located on both sides of the support component, a ball screw is arranged on the DC motor, a ball nut is sleeved on the ball screw, the ball nut and a push rod are connected with the brake valve by screw connection, the DC motor is electrically connected with the controller component, the controller component controls the operation of the DC motor, the brake valve comprises a housing, a piston component, an end cover, an oil storage cup and an oil cup cover, the piston component is mounted in the housing, the piston component is closely matched with the inner cavity of the housing and can slide in the housing, the piston component comprises a large piston and a small piston, a small hydraulic cavity is arranged in the large hydraulic cavity formed between the large piston and the housing, the small piston can be slidably arranged in the small hydraulic cavity, the end cover is mounted on the housing by screws, a pressure sensor is arranged on the end cover, and the pressure sensor is electrically connected with the controller component.

[0005] Furthermore, the controller component controls the operation of the DC motor through PWM communication, uses a Hall component to collect the working stroke of the DC motor, and the Hall component is electrically connected to the controller.

[0006] Furthermore, the Hall component is provided with a low position and a high position.

[0007] Furthermore, an oil storage cup is provided on the shell, an oil storage cup is provided with an oil cup cover, and hydraulic oil is stored in the oil storage cup.

[0008] Beneficial effect: Compared with the prior art, the passive electrically controlled brake valve with a large oil displacement of the present invention has a double-piston structure, which greatly improves the oil displacement of the brake valve, so that the oil displacement reaches between 25ml and 45ml, and can be used with more wheel brake devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the brake valve structure of the present invention; In the figure: 1-brake valve, 2-controller assembly, 3-DC motor, 4-support assembly, 5-pressure sensor, 11-housing, 12-end cover, 13-oil storage cup, 14-oil cup cover, 15-large piston, 16-small piston. DETAILED DESCRIPTION

[0010] like Figure 1 and Figure 2 As shown, a passive electric-controlled brake valve with a large oil displacement comprises a brake valve 1, a controller component 2, a DC motor 3, a support component 4 and a pressure sensor 5. The brake valve 1, the controller component 2 and the DC motor 3 are mounted on the support component 4. The brake valve 1 and the DC motor 3 are respectively located on both sides of the support component 4. A ball screw is provided on the DC motor 3, and a ball nut is sleeved on the ball screw. The ball nut and the push rod are connected with the brake valve 1 through screw connection. The DC motor 3 is electrically connected to the controller component 2, and the controller component 2 controls the operation of the DC motor 3. The brake valve 1 comprises a housing 11, a piston component, an end cover 12, an oil storage cup 13 and an oil cup cover 14. The piston component Installed in the shell 11, the piston assembly is tightly matched with the inner cavity of the shell 11 and can slide in the shell 11. The piston assembly includes a large piston 15 and a small piston 16. A small hydraulic cavity is provided in the large hydraulic cavity formed between the large piston 15 and the shell 11. The small piston 16 is slidably arranged in the small hydraulic cavity. The end cover 12 is installed on the shell 11 by screws. A pressure sensor 5 is provided on the end cover 12. The pressure sensor 5 is electrically connected to the controller assembly 2. The pressure sensor 5 can collect the brake pressure and feed it back to the controller assembly 2. The controller assembly 2 feeds back to the upper computer. When the controller controls the DC motor 3 to work, the ball nut moves, pushes the piston in the brake valve 1, and outputs the hydraulic brake pressure.

[0011] The controller component 2 controls the operation of the DC motor 3 through PWM communication, and uses the Hall component to collect the working stroke of the DC motor 3. The Hall component is electrically connected to the controller, and the stroke position of the DC motor is fed back to the controller component 2. The controller component 2 receives the control PWM communication signal sent by the upper computer, and sends a PWM working signal to the DC motor 3 to control the operation of the DC motor 3; the Hall component is provided with a low position and a high position. When the controller component 2 sends a PWM working signal to the DC motor 3, the magnet on the DC motor 3 moves from the low position of the Hall component to the high position. When it reaches the high position of the Hall component, the Hall component feeds back the signal to the controller component 2, and the controller component 2 controls the DC motor 3 to stop working; the shell 11 is provided with an oil storage cup 13, and the oil storage cup 13 is provided with an oil cup cover 14. The hydraulic oil is stored in the oil storage cup 13 for providing oil to the brake valve 1.

[0012] The specific implementation process is as follows: When the brake is working, the controller component 2 controls the DC motor 3 to work, the ball nut moves, and the large piston 15 is pushed to move toward the small piston 16. The large hydraulic chamber formed between the large piston 15 and the housing 11 establishes hydraulic pressure, and the large hydraulic chamber works. At this time, the small hydraulic chamber is in a passage state. When the large piston 15 moves, the idle stroke between the large hydraulic chamber and the small hydraulic chamber can be eliminated, and the hydraulic oil pushed out can eliminate the brake clearance of the brake device. When a certain brake pressure is reached, the passage between the small hydraulic chamber and the large hydraulic chamber is closed, and the small hydraulic chamber starts to work. The large hydraulic chamber and the hydraulic chamber in the electric control brake valve form a passage state, and there is no pressure in the large hydraulic chamber. At this time, the ball nut of the DC motor 3 continues to move, and the electric control brake valve continues to output hydraulic brake pressure. The oil in the hard pipeline will be compressed, and the hose will expand due to the continuous input of pressure. The inside of the piston chamber of the brake device will produce a slight deformation. At this time, the small hydraulic chamber continues to work, and the output brake oil will make up for the above-mentioned consumption; finally, through the close cooperation of the large piston 15 and the small piston 16, the electric control brake valve outputs the maximum oil discharge volume to achieve wheel braking.

[0013] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A passive electric-controlled brake valve with a large oil displacement, comprising a brake valve (1), a controller component (2), a DC motor (3), a support component (4) and a pressure sensor (5), characterized in that: The brake valve (1), the controller component (2) and the DC motor (3) are mounted on a support component (4). The brake valve (1) and the DC motor (3) are located on both sides of the support component (4) respectively. A ball screw is provided on the DC motor (3). A ball nut is sleeved on the ball screw. The ball nut and the push rod are connected to the brake valve (1) by screws. The DC motor (3) is electrically connected to the controller component (2). The controller component (2) controls the operation of the DC motor (3). The brake valve (1) comprises a housing (11), a piston component, an end cover (12), an oil storage The piston assembly is installed in the housing (11), the piston assembly is tightly matched with the inner cavity of the housing (11) and can slide in the housing (11), the piston assembly includes a large piston (15) and a small piston (16), a small hydraulic cavity is provided in the large hydraulic cavity formed between the large piston (15) and the housing (11), and the small piston (16) can be slidably arranged in the small hydraulic cavity, the end cover (12) is installed on the housing (11) by screws, and a pressure sensor (5) is provided on the end cover (12), and the pressure sensor (5) is electrically connected to the controller assembly (2).

2. The passive electric-controlled brake valve with large oil displacement according to claim 1 is characterized in that: The controller component (2) controls the operation of the DC motor (3) through PWM communication, and uses a Hall component to collect the working stroke of the DC motor (3); the Hall component is electrically connected to the controller.

3. The passive electronically controlled brake valve with large oil displacement according to claim 2 is characterized in that: The Hall component is provided with a low position and a high position.

4. The passive electric-controlled brake valve with large oil displacement according to claim 1 is characterized in that: An oil storage cup (13) is provided on the housing (11), an oil storage cup cover (14) is provided on the oil storage cup (13), and hydraulic oil is stored in the oil storage cup (13).

Images