Passive electric control brake valve with large oil discharge amount

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 utility model relates to the technical field of aircraft brake, especially relates to a large oil displacement passive electric control brake valve. BACKGROUND

[0002] The passive electric control brake valve is an important component of the aircraft landing system, compared with the traditional electric control brake valve, the large displacement passive electric control brake valve has obvious advantages such as simple structure, high reliability, good economy, large oil displacement and high matching, and the use of the large oil displacement passive electric control brake valve is the development direction of the aircraft brake technology. The maximum oil displacement of the existing electric control brake valve is 9.2ml, and the more oil displacement demand wheel brake device cannot be matched. SUMMARY

[0003] To solve the problems mentioned in the background art, the utility model provides a large oil displacement passive electric control brake valve.

[0004] The utility model discloses the following technical scheme: a large oil displacement passive electric control brake valve, including brake valve, controller assembly, DC motor, support assembly and pressure sensor, brake valve, controller assembly and DC motor are installed on support assembly, and brake valve is located two sides of support assembly respectively with DC motor, is equipped with ball screw on DC motor, is equipped with ball nut on ball screw, and ball nut and top rod are connected after screw connection and are connected with brake valve, and DC motor is electrically connected with controller assembly, and controller assembly controls the work of DC motor, brake valve includes casing, piston assembly, end cover, oil storage cup and oil cup cover, and piston assembly is installed in casing, and piston assembly is closely matched with the inner chamber of casing and can slide in the casing, and piston assembly includes big piston and small piston, and the small hydraulic chamber is equipped in the big hydraulic chamber between big piston and casing, and small piston can be slidably arranged in the small hydraulic chamber, the end cover is installed on the casing through screw, and the pressure sensor is equipped on the end cover, and the pressure sensor is electrically connected with controller assembly.

[0005] Further, the controller assembly controls the work of DC motor through PWM communication, uses the Hall component to collect the work stroke of DC motor, and the Hall component is electrically connected with the controller.

[0006] Further, the Hall component is equipped with low and high positions.

[0007] Further, the casing is equipped with the oil storage cup, the oil cup cover is equipped on the oil storage cup, and the oil storage cup stores hydraulic oil.

[0008] Beneficial effect: compared with the prior art, the large oil displacement passive electric control brake valve of the utility model is 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 more wheel brake devices can be matched. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0010] Figure 2 This is a schematic diagram of the brake valve structure of the utility model;

[0011] 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

[0012] like Figure 1 and Figure 2 As shown, a passive electrically controlled brake valve with a large oil displacement comprises a brake valve 1, a controller assembly 2, a DC motor 3, a support assembly 4 and a pressure sensor 5. The brake valve 1, the controller assembly 2 and the DC motor 3 are mounted on the support assembly 4. The brake valve 1 and the DC motor 3 are respectively located on both sides of the support assembly 4. 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 through screws. The DC motor 3 is electrically connected to the controller assembly 2. The controller assembly 2 controls the operation of the DC motor 3. The brake valve 1 comprises a housing 11, a piston assembly, an end cover 12, an oil storage cup 13 and an oil cup cover 14. The piston assembly The components are 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, and a small hydraulic cavity is provided in the large hydraulic cavity formed between the large piston 15 and the shell 11, and the small piston 16 is slidably arranged in the small hydraulic cavity. The end cover 12 is installed on the shell 11 by screws, and 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, and the controller assembly 2 feeds back to the host 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.

[0013] The controller assembly 2 controls the DC motor 3 to work through PWM communication, uses a Hall assembly to collect the working stroke of the DC motor 3, the Hall assembly is electrically connected with the controller, the stroke position of the DC motor is fed back to the controller assembly 2, the controller assembly 2 receives the control PWM communication signal sent by the upper computer, sends the PWM working signal to the DC motor 3, and controls the DC motor 3 to work; the Hall assembly is provided with a low position and a high position, when the controller assembly 2 sends the PWM working signal to the DC motor 3, the magnetic steel on the DC motor 3 moves from the low position of the Hall assembly to the high position, when reaching the high position of the Hall assembly, the Hall assembly feeds back the signal to the controller assembly 2, and the controller assembly 2 controls the DC motor 3 to stop working; the shell 11 is provided with an oil storage cup 13, the oil storage cup 13 is provided with an oil cup cover 14, the oil storage cup 13 stores hydraulic oil, and is used for providing oil to the brake valve 1.

[0014] The specific implementation process is as follows:

[0015] When the brake works, the controller assembly 2 controls the DC motor 3 to work, the ball nut moves, the large piston 15 is pushed to move to the small piston 16, the large hydraulic cavity formed between the large piston 15 and the shell 11 establishes hydraulic pressure, the large hydraulic cavity works, at this time, the small hydraulic cavity is in a passage state, when the large piston 15 moves, the idle stroke between the large hydraulic cavity and the small hydraulic cavity can be eliminated, the hydraulic oil pushed out can eliminate the brake gap of the brake device, when a certain brake pressure is reached, the passage between the small hydraulic cavity and the large hydraulic cavity is closed, the small hydraulic cavity starts to work, the large hydraulic cavity forms a passage state with the hydraulic cavity in the electric control brake valve, and the large hydraulic cavity has no pressure, at this time, the ball nut of the DC motor 3 continues to move, the electric control brake valve continues to output hydraulic brake pressure, the oil in the hard pipeline is compressed, and the soft pipeline expands due to the continuous input of pressure. At this time, the small hydraulic cavity continues to work, and the output brake oil quantity can make up for the 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 capacity, so that the wheel realizes braking.

[0016] The above merely describes a preferred specific implementation manner of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the utility model concept of the utility model within the technical range disclosed by the utility model, and all should be covered in the protection scope of the utility model.

Claims

1. A passive electronically controlled brake valve with a large oil displacement, comprising a brake valve (1), a controller assembly (2), a DC motor (3), a support assembly (4) and a pressure sensor (5), characterized in that: The brake valve (1), the controller assembly (2) and the DC motor (3) are mounted on the support assembly (4). The brake valve (1) and the DC motor (3) are respectively located on both sides of the support assembly (4). 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) through screws. The DC motor (3) is electrically connected to the controller assembly (2). The controller assembly (2) controls the operation of the DC motor (3). The brake valve (1) includes a housing (11), a piston assembly, 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) is slidably provided 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 electronically controlled brake valve with a large oil displacement according to claim 1, 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), and the Hall component is electrically connected to the controller.

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

4. The passive electronically controlled brake valve with a large oil displacement according to claim 1, 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).

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