Automatic band-type brake torque adjusting device

Abstract

The utility model relates to the technical field of brakes, in particular to an automatic band-type brake torque adjusting device which comprises a brake cylinder body, two oil filling cavities are formed in the brake cylinder body, pistons are connected in the two oil filling cavities in a sliding mode, connecting hard plates are arranged on the opposite side faces of the two pistons, and connecting grooves are formed in the opposite side faces of the two connecting hard plates. Two first pressure oil pipes are arranged on the left side of the brake cylinder body, oil outlet pipes are arranged on the upper side and the lower side of the brake cylinder body, and second pressure oil pipes are arranged on the upper side and the lower side of the brake cylinder body. According to the automatic band-type brake torque adjusting device, the hydraulic pressure in the oil filling cavity is monitored in real time through the pressure sensor, when it is detected that the pressure is lower than a set threshold value, the second pressure oil pipe inputs hydraulic oil into the oil filling cavity, and the pressure in the oil filling cavity is automatically increased, so that the piston is pushed to move towards the brake disc, and the extrusion force of the friction plate on the brake disc is increased; automatic compensation of abrasion of the friction plate is achieved, and stable braking torque is kept.

Description

Technical Field

[0001] The utility model relates to the technical field of brakes, in particular to an automatic brake torque regulating device. Background Art

[0002] Active hydraulic disc brake is a normally open brake that uses hydraulic pressure for braking. It is widely used in the yaw mechanism of wind turbines. Its main function is to ensure that the horizontal axis wind turbine can effectively adjust the rotation direction under different wind speed and wind direction conditions through multiple pairs of brakes, so as to maximize the use of wind and improve power generation efficiency. In addition, the brake can not only play the role of wind power generation, yaw and unwinding of the wind turbine, but also has good response speed and braking stability, ensuring the safe and reliable operation of the wind power generation system under various working conditions.

[0003] The patent with the publication number CN104500619A discloses a wind power active hydraulic yaw disc brake with a friction plate extreme wear protection function. It is mainly composed of a brake cylinder, a piston, a friction plate, a sealing assembly, a friction plate baffle and a pressure column. The friction plate of the present invention is installed in the cylinder or the cavity formed by the cylinder and the baffle, and can also be directly pressed under the pressure column. The steel back of the friction plate contacts the front end of the piston or the pressure column. The piston pushes the friction plate to press the end face of the brake disc under the action of the pressure oil to generate a set braking torque. When the friction plate is worn, the piston will continue to push the friction plate to move in the thickness direction of the brake disc under the action of the pressure oil. When the friction plate is worn to a certain extent, the piston moves forward under the action of the pressure oil, and its rear end face passes over the main seal. At this time, the pressure oil will directly release pressure through the oil drain channel, and the piston will not continue to push the friction plate to press against the brake disc, avoiding the friction plate steel back that has been worn to the limit directly rubbing against the end face of the brake disc, thereby protecting the brake disc.

[0004] In the above-mentioned prior art, the wind power active hydraulic yaw disc brake enters the brake cylinder from the pressure oil port through the set high-value pressure oil, pushing the piston forward, thereby making the friction plate and the brake disc in close contact and applying a braking torque. However, when the friction plate is worn during use, although the input hydraulic pressure remains unchanged, the braking torque generated may decrease due to the reduction in the thickness of the friction plate. This situation will not only affect the braking effect of the brake disc, resulting in a decrease in braking performance, but may even cause slippage in some cases, posing potential safety hazards to the wind turbine generator set. In view of this, we propose an automatic brake torque adjustment device. Utility Model Content

[0005] The purpose of the utility model is to provide an automatic brake torque adjustment device to solve the problems raised in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An automatic brake torque adjustment device includes a brake cylinder body, wherein the brake cylinder body is provided with two oil-filled chambers which are symmetrically arranged in an upper and lower manner for storing and transmitting hydraulic oil, and the piston is pushed to move by the pressure of the hydraulic oil, thereby realizing the transmission of braking force, and pistons are slidably connected in the two oil-filled chambers, and springs are provided on the opposite sides of the two pistons, and one end of the spring away from the piston is fixedly connected to the inner wall of the oil-filled chamber. When the hydraulic oil in the oil-filled chamber leaks out, the piston can be reset, and connecting hard plates are provided on the opposite sides of the two pistons, which connect the pistons and the mounting base plate to transmit pressure and displacement and provide support for the mounting base plate. The two connecting hard plates A connecting groove is provided in the middle of the opposite sides of the connecting hard plate, and a pressure sensor is provided in each of the two connecting grooves. The connecting groove is used to install and fix the pressure sensor to ensure that the sensor can accurately measure the pressure. The opposite sides of the two connecting hard plates are connected to the mounting base plates, and the middle parts of the opposite sides of the two mounting base plates are provided with a pressing block. The two pressing blocks are respectively pressed against the two pressure sensors to transmit pressure signals to ensure that the system can monitor the pressure changes in real time. Friction plates are provided on the opposite sides of the two mounting base plates, which move under the pressure of the hydraulic oil, and the piston pushes the friction plate to press the brake disc, thereby generating a braking torque.

[0008] Two first pressure oil pipes are provided on the left side of the brake cylinder body, the first pressure oil pipes are externally connected to the hydraulic system, the two first pressure oil pipes are respectively connected to the two oil filling chambers for conveying hydraulic oil, and are connected to the oil filling chambers to realize the input of hydraulic oil. The two first pressure oil pipes are provided with first one-way valves to ensure that the hydraulic oil can only flow in one direction to prevent backflow;

[0009] The upper and lower sides of the brake cylinder body are provided with oil outlet pipes, the two oil outlet pipes are respectively connected to the two oil filling chambers for outputting the hydraulic oil, and are connected to the oil filling chambers to realize the release of the hydraulic oil. The two oil outlet pipes are provided with solenoid valves, which are installed on the oil outlet pipes to control the circulation of the hydraulic oil and realize automatic control;

[0010] Second pressure oil pipes are provided on the upper and lower sides of the brake cylinder body. The second pressure oil pipes are connected to the hydraulic system externally. The two second pressure oil pipes are respectively connected to the two oil filling chambers for conveying hydraulic oil. They are connected to the oil filling chambers to realize the input of hydraulic oil. Second one-way valves are provided on the two second pressure oil pipes, which are installed on the second pressure oil pipes to ensure that the hydraulic oil can only flow in one direction to prevent backflow. When the pressure sensor detects that the pressure is lower than the set threshold, the second pressure oil pipe inputs hydraulic oil into the oil filling chamber to increase the pressure in the oil filling chamber, thereby moving the piston toward the brake disc, increasing the squeezing force of the friction plate on the brake disc, and thus avoiding the brake disc from slipping.

[0011] Preferably, the inner walls of the two oil-filled chambers are provided with annular oil drain grooves, and two oil drain pipes are provided on the left side of the brake cylinder body. The two oil drain pipes are respectively connected to the two annular oil drain grooves for relieving pressure when the piston moves to the extreme position to prevent the mounting base from being worn by the brake disc.

[0012] Preferably, the outer walls of the two pistons are provided with annular grooves, and the two annular grooves are provided with annular sealing rubbers, the annular sealing rubbers are located at the annular oil drain grooves, and the height of the annular sealing rubbers is greater than the height of the annular oil drain grooves. When the friction plate is severely worn, the annular sealing rubbers are staggered with the annular oil drain grooves, so that the hydraulic oil can enter the annular oil drain grooves, thereby achieving the effect of pressure relief and preventing the mounting base from being worn by the brake disc.

[0013] Preferably, the outer wall of the pressure block fits with the inner wall of the connecting groove, which is beneficial to the accuracy of pressure measurement.

[0014] Preferably, a plurality of threaded grooves are provided on one side of the connecting hard plate close to the mounting substrate, and a plurality of mounting holes are provided on the mounting substrate. Connecting bolts are connected in each of the plurality of mounting holes, and the threaded ends of the connecting bolts are threadedly connected in the threaded grooves, so as to facilitate the connection between the connecting hard plate and the mounting substrate.

[0015] Preferably, the cross section of the mounting hole is a "T"-shaped structure, the head of the connecting bolt is located in the mounting hole, and the mounting base plate can move up and down along the connecting bolt to ensure that the pressure block can squeeze the pressure sensor.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] 1. The automatic brake torque adjustment device monitors the hydraulic pressure in the oil filling chamber in real time through a pressure sensor. When the pressure is detected to be lower than the set threshold, the second pressure oil pipe inputs hydraulic oil into the oil filling chamber, automatically increasing the pressure in the oil filling chamber, thereby pushing the piston to move toward the brake disc, increasing the squeezing force of the friction plate on the brake disc, realizing automatic compensation for the wear of the friction plate, and maintaining a stable braking torque.

[0018] 2. In the automatic brake torque adjustment device, when the friction plate is severely worn, the annular sealing rubber and the annular oil drain groove are staggered, allowing the hydraulic oil to enter the annular oil drain groove to achieve pressure relief, avoid the piston from continuing to apply pressure, and protect the mounting base plate from wear.

[0019] 3. The automatic brake torque adjustment device is provided with a first one-way valve and a second one-way valve respectively installed on the first pressure oil pipe and the second pressure oil pipe to ensure that the hydraulic oil can only flow in one direction, prevent the hydraulic oil from flowing back, and ensure the stability and effectiveness of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall cross-sectional structure of the utility model;

[0021] Figure 2 It is a partial structural schematic diagram of the utility model;

[0022] Figure 3 It is a schematic diagram of the assembly structure of the mounting base plate and the friction plate in the utility model;

[0023] Figure 4 It is a schematic diagram of the assembly structure of connecting the hard board and the mounting base plate in the utility model;

[0024] Figure 5 It is a schematic cross-sectional structure diagram of the connection hard board and the mounting base plate in the utility model;

[0025] In the figure: 1. brake cylinder body; 10. oil filling chamber; 11. annular oil drain groove; 2. piston; 20. annular groove; 3. connecting hard plate; 30. connecting groove; 31. threaded groove; 4. mounting base plate; 40. pressure block; 41. mounting hole; 5. friction plate; 6. first pressure oil pipe; 60. first one-way valve; 7. oil outlet pipe; 70. solenoid valve; 8. second pressure oil pipe; 80. second one-way valve; 9. oil drain pipe; 12. annular sealing rubber; 13. pressure sensor; 14. connecting bolts. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] See also Figure 1-Figure 5 , the utility model provides a technical solution:

[0029] An automatic brake torque adjustment device includes a brake cylinder 1, in which two oil-filled chambers 10 are arranged symmetrically in the upper and lower parts, for storing and transmitting hydraulic oil, and the piston 2 is pushed to move by the pressure of the hydraulic oil, so as to realize the transmission of the braking force. The two oil-filled chambers 10 are both slidably connected with pistons 2, and the opposite sides of the two pistons 2 are provided with springs, and the end of the spring away from the piston 2 is fixedly connected to the inner wall of the oil-filled chamber 10. When the hydraulic oil in the oil-filled chamber 10 leaks out, the piston 2 can be reset. The opposite sides of the two pistons 2 are provided with connecting hard plates 3, which connect the piston 2 and the mounting base plate 4 to transmit pressure and displacement and provide support for the mounting base plate 4. The middle parts of the opposite sides of the two connecting hard plates 3 are provided with connecting grooves 3 0, pressure sensors 13 are arranged in the two connecting grooves 30, and the pressure sensors 13 are connected to the control system externally, which is used to control the hydraulic system to pump hydraulic oil into the second pressure oil pipe 8. The connecting groove 30 is used to install and fix the pressure sensor 13 to ensure that the sensor can accurately measure the pressure. The opposite sides of the two connecting hard plates 3 are connected with mounting base plates 4, and the middle parts of the opposite sides of the two mounting base plates 4 are provided with abutment blocks 40. The two abutment blocks 40 are respectively against the two pressure sensors 13 to transmit pressure signals to ensure that the system can monitor the pressure changes in real time. The opposite sides of the two mounting base plates 4 are provided with friction plates 5, which move under the pressure of the hydraulic oil, and the piston 2 pushes the friction plates 5 to press the brake disc, thereby generating a braking torque;

[0030] Two first pressure oil pipes 6 are provided on the left side of the brake cylinder body 1. The first pressure oil pipes 6 are externally connected to the hydraulic system. The two first pressure oil pipes 6 are respectively connected to the two oil filling chambers 10 for conveying hydraulic oil. The two first pressure oil pipes 6 are connected to the oil filling chambers 10 to realize the input of hydraulic oil. The two first pressure oil pipes 6 are both provided with first one-way valves 60 to ensure that the hydraulic oil can only flow in one direction to prevent backflow.

[0031] The upper and lower sides of the brake cylinder body 1 are both provided with oil outlet pipes 7, which are respectively connected to the two oil filling chambers 10 for outputting the hydraulic oil and connected to the oil filling chambers 10 to release the hydraulic oil. The two oil outlet pipes 7 are both provided with solenoid valves 70, which are installed on the oil outlet pipes 7 to control the circulation of the hydraulic oil and realize automatic control.

[0032] Second pressure oil pipes 8 are provided on the upper and lower sides of the brake cylinder body 1. The second pressure oil pipes 8 are connected to the external hydraulic system. The two second pressure oil pipes 8 are respectively connected to the two oil filling chambers 10 for conveying hydraulic oil. They are connected to the oil filling chambers 10 to realize the input of hydraulic oil. Second one-way valves 80 are provided on the two second pressure oil pipes 8. The second one-way valves 80 are installed on the second pressure oil pipes 8 to ensure that the hydraulic oil can only flow in one direction to prevent backflow. When the pressure sensor 13 detects that the pressure is lower than the set threshold, the second pressure oil pipe 8 inputs hydraulic oil into the oil filling chamber 10 to increase the pressure in the oil filling chamber 10, thereby moving the piston 2 toward the brake disc, increasing the squeezing force of the friction plate 5 on the brake disc, thereby avoiding the brake disc from slipping.

[0033] In this embodiment, the inner walls of the two oil-filled chambers 10 are both provided with annular oil drain grooves 11, and two oil drain pipes 9 are provided on the left side of the brake cylinder body 1. The two oil drain pipes 9 are respectively connected to the two annular oil drain grooves 11, which are used to release pressure when the piston 2 moves to the extreme position to prevent the mounting base 4 from being worn by the brake disc.

[0034] Specifically, the outer walls of the two pistons 2 are each provided with an annular groove 20, and the two annular grooves 20 are each provided with an annular sealing rubber 12, the annular sealing rubber 12 is located at the annular oil drain groove 11, and the height of the annular sealing rubber 12 is greater than the height of the annular oil drain groove 11. When the friction plate 5 is severely worn, the annular sealing rubber 12 is staggered with the annular oil drain groove 11, so that the hydraulic oil can enter the annular oil drain groove 11, thereby achieving the effect of pressure relief and preventing the mounting base plate 4 from being worn by the brake disc.

[0035] Furthermore, the outer wall of the pressing block 40 fits with the inner wall of the connecting groove 30 , which is beneficial to the accuracy of pressure measurement.

[0036] Furthermore, a plurality of threaded grooves 31 are provided on one side of the connecting hard board 3 close to the mounting substrate 4, and a plurality of mounting holes 41 are provided on the mounting substrate 4. Connecting bolts 14 are connected to each of the plurality of mounting holes 41, and the threaded ends of the connecting bolts 14 are threadedly connected to the threaded grooves 31, so as to facilitate the connection between the hard board 3 and the mounting substrate 4.

[0037] Furthermore, the cross section of the mounting hole 41 is a “T”-shaped structure, the head of the connecting bolt 14 is located in the mounting hole 41 , and the mounting base plate 4 can move up and down along the connecting bolt 14 to ensure that the pressing block 40 can squeeze the pressure sensor 13 .

[0038] When the automatic brake torque adjustment device of this embodiment is in use, the brake cylinder body 1 is installed at the required position, and the first pressure oil pipe 6, the second pressure oil pipe 8 and the oil outlet pipe 9 are connected to the hydraulic system to ensure that the connection and sealing of all oil pipes and the hydraulic system are good to prevent hydraulic oil leakage, and a proper amount of hydraulic oil is injected into the hydraulic system, and the hydraulic pump is started through the control system to gradually input hydraulic oil into the oil filling chamber 10, and the reading of the pressure sensor 13 is monitored to ensure that the pressure sensor 13 can work normally, and the hydraulic pressure in the oil filling chamber 10 is fed back in real time, and the control system of the solenoid valve 15 is adjusted to ensure that the solenoid valve 15 can accurately control the circulation of the hydraulic oil, so as to achieve Hydraulic oil is released in time when needed. During system operation, hydraulic oil is input into the oil filling chamber 10 through the first pressure oil pipe 6, pushing the piston 2 forward, and then pushing the friction plate 5 to press the brake disc to generate a braking torque. When the friction plate 5 wears during use and the pressure sensor 13 detects that the pressure in the oil filling chamber 10 is lower than the set threshold, the second pressure oil pipe 8 will automatically input hydraulic oil into the oil filling chamber 10 to increase the pressure in the oil filling chamber 10, ensuring that the friction plate 5 can always provide sufficient braking torque. When the brake disc needs to be braked, the solenoid valve 15 controls the release of hydraulic oil from the oil outlet pipe 9 to realize automatic control of the hydraulic system.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. An automatic brake torque adjustment device, comprising a brake cylinder (1), characterized in that: The brake cylinder body (1) has two oil-filling chambers (10) arranged symmetrically in the upper and lower parts. The two oil-filling chambers (10) are slidably connected to pistons (2). The opposite sides of the two pistons (2) are provided with connecting hard plates (3). The middle parts of the opposite sides of the two connecting hard plates (3) are provided with connecting grooves (30). The two connecting grooves (30) are provided with pressure sensors (13). The opposite sides of the two connecting hard plates (3) are connected to mounting substrates (4). The middle parts of the opposite sides of the two mounting substrates (4) are provided with pressure blocks (40). The two pressure blocks (40) are respectively abutted against the two pressure sensors (13). The opposite sides of the two mounting substrates (4) are provided with friction The wiper (5) is provided with two first pressure oil pipes (6) on the left side of the brake cylinder body (1), the two first pressure oil pipes (6) are respectively connected to the two oil filling chambers (10), and the two first pressure oil pipes (6) are each provided with a first non-return valve (60); the upper and lower sides of the brake cylinder body (1) are provided with oil outlet pipes (7), the two oil outlet pipes (7) are respectively connected to the two oil filling chambers (10), and the two oil outlet pipes (7) are each provided with a solenoid valve (70); the upper and lower sides of the brake cylinder body (1) are provided with second pressure oil pipes (8), the two second pressure oil pipes (8) are respectively connected to the two oil filling chambers (10), and the two second pressure oil pipes (8) are each provided with a second non-return valve (80).

2. The automatic brake torque adjustment device according to claim 1 is characterized in that: The inner walls of the two oil filling chambers (10) are each provided with an annular oil drain groove (11), and the left side of the brake cylinder body (1) is provided with two oil drain pipes (9), and the two oil drain pipes (9) are respectively connected to the two annular oil drain grooves (11).

3. The automatic brake torque adjustment device according to claim 2 is characterized in that: The outer walls of the two pistons (2) are each provided with an annular groove (20), and the two annular grooves (20) are each provided with an annular sealing rubber (12). The annular sealing rubber (12) is located at the annular oil drain groove (11), and the height of the annular sealing rubber (12) is greater than the height of the annular oil drain groove (11).

4. The automatic brake torque adjustment device according to claim 1, characterized in that: The outer wall of the pressing block (40) fits into the inner wall of the connecting groove (30).

5. The automatic brake torque adjustment device according to claim 1, characterized in that: A plurality of thread grooves (31) are formed on a side of the connection hard plate (3) close to the mounting base plate (4), a plurality of mounting holes (41) are formed on the mounting base plate (4), and connection bolts (14) are connected to the plurality of mounting holes (41), and the threaded ends of the connection bolts (14) are threadedly connected to the thread grooves (31).

6. The automatic brake torque adjustment device according to claim 5, characterized in that: The cross section of the mounting hole (41) is a "T"-shaped structure; the head of the connecting bolt (14) is located in the mounting hole (41); and the mounting base plate (4) can move up and down along the connecting bolt (14).

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