阅读说明：本技术 一种盘式制动装置保压型液压控制系统 (Pressure maintaining type hydraulic control system of disc type braking device ) 是由 孙兆宽 黄志慧 唐洪华 于 2020-12-07 设计创作，主要内容包括：本发明公开一种盘式制动装置保压型液压控制系统,包括供压回路、蓄能管路和补压回路；所述供压回路为对称的双回路结构,其中一路沿供油方向依次串联粗滤油器、齿轮泵、精滤器、第一单向阀和手动换向阀,所述手动换向阀连接有电接点压力表和压力传感器,所述补压回路设置于所述手动换向阀与电接点压力表和压力传感器连接之间,所述补压回路上设置有手动液压泵,所述蓄能回路上设置有蓄能器；本系统采用了双回路保压型液压站,系统自动运行后,系统压力达到工作设定高点值后,电机自动断电；系统压力下降至工作设定低点值后,电机自动通电运行；反复工作运行,减少了系统运行时产生的热量,有效的保护了各部件的使用寿命。(The invention discloses a pressure maintaining type hydraulic control system of a disc type braking device, which comprises a pressure supply loop, an energy storage pipeline and a pressure supplementing loop, wherein the pressure supply loop is connected with the pressure supplementing loop; the pressure supply loop is of a symmetrical double-loop structure, one of the pressure supply loops is sequentially connected with a coarse oil filter, a gear pump, a fine filter, a first one-way valve and a manual reversing valve in series along an oil supply direction, the manual reversing valve is connected with an electric contact pressure gauge and a pressure sensor, the pressure compensation loop is arranged between the manual reversing valve and the connection of the electric contact pressure gauge and the pressure sensor, a manual hydraulic pump is arranged on the pressure compensation loop, and an energy accumulator is arranged on the energy storage loop; the system adopts a double-loop pressure-maintaining type hydraulic station, and after the system automatically operates and the system pressure reaches a working set high-point value, the motor automatically cuts off the power supply; after the system pressure is reduced to a working set low-point value, the motor is automatically electrified and operated; the heat generated during the operation of the system is reduced by the repeated operation, and the service life of each part is effectively protected.)

1. A pressure maintaining type hydraulic control system of a disc type braking device is characterized by comprising a pressure supply loop, an energy storage pipeline and a pressure compensating loop; the pressure supply loop is the two return circuits structure of symmetry, and one of them way is connected gradually coarse oil filter ware (1), gear pump (3), secondary filter (4), first check valve (13) and manual switching-over valve (8) along the oil supply direction in series, manual switching-over valve (8) are connected with electric contact pressure gauge (5) and pressure sensor (14), the pressure supplementing loop set up in between manual switching-over valve (8) are connected with electric contact pressure gauge (5) and pressure sensor (14), be provided with manual hydraulic pump (15) on the pressure supplementing loop, be provided with energy storage ware (16) on the energy storage loop.

2. A pressure maintaining hydraulic control system for a disc brake apparatus according to claim 1, characterized in that the inlet of the accumulator (16) is connected between a second check valve (7) provided on the pressure supply circuit and the manual directional valve (8).

3. A pressure maintaining type hydraulic control system of a disc brake apparatus according to claim 2, characterized in that the pressure supply circuit further comprises an electro-hydraulic proportional valve (6), a first throttle valve (9), an overflow valve (10) and a solenoid directional valve (12); the electromagnetic directional valve (12) is respectively connected with the electro-hydraulic proportional valve (6), the first throttle valve (9) and the overflow valve (10).

4. A pressure-maintaining type hydraulic control system of a disc brake apparatus according to claim 3, wherein the first throttle valve (9) is provided on one side of the second check valve (7).

5. The pressure-maintaining type hydraulic control system of a disc brake device according to claim 4, characterized in that a second throttle valve (17) is further provided between the connection of the electromagnetic directional valve (12) and the overflow valve (10).

6. A pressure maintaining hydraulic control system of a disc brake apparatus according to claim 5, characterized in that the pressure supply circuit further comprises a main relief valve (11).

7. A pressure maintaining hydraulic control system of a disc brake apparatus according to claim 6, characterized in that the main relief valve (11) is provided between the accumulator (16) and the first check valve (13).

8. A pressure maintaining hydraulic control system for a disc brake apparatus according to claim 1, characterized in that the gear pump (3) is provided with an electric motor (2) in connection.

9. A pressure maintaining hydraulic control system for a disc brake apparatus according to claim 1, characterized in that a third check valve (19) is further provided between the connection of the manual hydraulic pump (15) and the manual directional valve (8).

10. A pressure maintaining hydraulic control system for a disc brake apparatus according to claim 9, characterized in that a third throttle valve (18) is further provided in connection with the manual directional valve (8).

Technical Field

The invention relates to the technical field of hydraulic control systems, in particular to a pressure-maintaining type hydraulic control system of a disc type braking device.

Background

Disc brake equipment is widely applied to industries such as coal mines, lifting, metallurgy and engineering machinery, and plays a vital role as a throat link of an operation system. The change of the braking force along with the braking time is called a braking characteristic curve, the quality of the characteristic curve is an important index for measuring the braking stability, and unstable braking can cause equipment damage and influence the personal safety.

The existing disc brake device has the following technical problems that the oil pump motor adopts a long-term working system, the system cannot automatically maintain pressure, and the temperature of each part is high when the equipment works for a long time, so that the oil temperature of an oil tank is slightly high and is greatly abraded due to the working environment.

Disclosure of Invention

The invention aims to provide a pressure maintaining type hydraulic control system of a disc brake device, which aims to solve the problems that in the existing hydraulic control system, an oil pump motor adopts a long-term working system, the system cannot automatically maintain pressure, and the temperature of each part is high when equipment works for a long time, so that the temperature of the oil tank is high and the abrasion is large due to the working environment.

In order to achieve the aim, the invention provides a pressure maintaining type hydraulic control system of a disc type braking device, which comprises a pressure supply loop, an energy storage pipeline and a pressure supplementing loop, wherein the pressure supply loop is connected with the pressure supplementing loop; the pressure supply loop is of a symmetrical double-loop structure, one of the pressure supply loops is sequentially connected with a coarse oil filter, a gear pump, a fine filter, a first one-way valve and a manual reversing valve in series along an oil supply direction, the manual reversing valve is connected with an electric contact pressure gauge and a pressure sensor, the pressure compensation loop is arranged between the manual reversing valve and the connection of the electric contact pressure gauge and the pressure sensor, a manual hydraulic pump is arranged on the pressure compensation loop, and an energy accumulator is arranged on the energy storage loop; the system adopts a double-loop pressure-maintaining type hydraulic station, and after the system automatically operates and the system pressure reaches a working set high-point value, the motor automatically cuts off the power supply; after the system pressure is reduced to a working set low-point value, the motor is automatically electrified and operated; the heat generated during the operation of the system is reduced by the repeated operation, and the service life of each part is effectively protected.

As a further improvement of the technical scheme, the inlet of the accumulator is connected between a second one-way valve arranged on the pressure supply circuit and the manual reversing valve.

As a further improvement of the above technical scheme, the pressure supply loop further comprises an electro-hydraulic proportional valve, a first throttle valve, an overflow valve and an electromagnetic directional valve; and the electromagnetic directional valve is respectively connected with the electro-hydraulic proportional valve, the first throttling valve and the overflow valve.

As a further improvement of the above technical solution, the first throttle valve is disposed on one side of the second check valve.

As a further improvement of the technical scheme, a second throttle valve is further arranged between the electromagnetic directional valve and the overflow valve.

As a further improvement of the above technical solution, the pressure supply circuit further includes a main relief valve.

As a further improvement of the above technical solution, the main relief valve is disposed between the accumulator and the first check valve.

As a further improvement of the technical scheme, the gear pump is connected with a motor.

As a further improvement of the technical scheme, a third one-way valve is further arranged between the manual hydraulic pump and the manual reversing valve.

As a further improvement of the technical scheme, the manual reversing valve is also connected with a third throttle valve.

Compared with the prior art, the invention has the beneficial effects that:

the system adopts electro-hydraulic proportional control, stepless pressure regulation can be realized, the boosting and pressure reducing processes are stable and rapid, the performance of the system is improved, and manual emergency brake release can be realized when the system is overhauled by a manual hydraulic pump.

The system adopts a double-loop pressure-maintaining type hydraulic station, and after the system automatically operates and the system pressure reaches a working set high-point value, the motor automatically cuts off the power supply; after the system pressure is reduced to a working set low-point value, the motor is automatically electrified and operated; the heat generated during the operation of the system is reduced by the repeated operation, and the service life of each part is effectively protected.

The disc type controllable braking device is provided with a pressure maintaining type hydraulic pump station, and the hydraulic pump station is provided with a pressure sensor; the hydraulic pump station is provided with an emergency brake release loop by adopting a pressure maintaining double-loop structure, so that the pressure maintaining time of a manual brake release function is not less than 6 hours; the hydraulic system has a hydraulic failure protection function; the brake can still ensure the belt conveyor to smoothly decelerate and stop when the system is suddenly powered off by the accumulator.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

in the drawings: 1. a coarse oil filter; 2. a motor; 3. a gear pump; 4. a fine filter; 5. an electric contact pressure gauge; 6. an electro-hydraulic proportional valve; 7. a one-way valve; 8. a manual directional control valve; 9. a throttle valve; 10. an overflow valve; 11. a main overflow valve; 12. an electromagnetic directional valve; 13. a one-way valve; 14. a pressure sensor; 15. a manual hydraulic pump; 16. an accumulator; 17. a second throttle valve; 18. a third throttle valve; 19. and a third one-way valve.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.

Referring to fig. 1, a pressure maintaining type hydraulic control system of a disc brake device includes a pressure supply circuit, an energy storage pipeline and a pressure compensating circuit; the pressure supply loop is of a symmetrical double-loop structure, one of the pressure supply loops is sequentially connected with a coarse oil filter 1, a gear pump 3, a fine filter 4, a first one-way valve 13 and a manual reversing valve 8 in series along the oil supply direction, and the pressure supply loop is divided into two pressure supply branches at the manual reversing valve 8; the manual reversing valve 8 is connected with an electric contact pressure gauge 5 and a pressure sensor 14, the pressure supplementing loop is arranged between the manual reversing valve 8 and the connection of the electric contact pressure gauge 5 and the pressure sensor 14, a manual hydraulic pump 15 is arranged on the pressure supplementing loop, an energy accumulator 16 is arranged on the energy storage loop, and hydraulic failure protection can be realized through the electric contact pressure gauge 5; the manual emergency brake release function during system fault maintenance can be realized through the manual hydraulic pump 15.

The inlet of the energy accumulator 16 is connected between the second one-way valve 7 and the manual reversing valve 8 arranged on the pressure supply loop, the energy accumulator 16 can fully maintain the oil pressure of the hydraulic system, when the system is in a braking state, the oil pump motor is not started, and the energy accumulator 16 is used as an emergency power source to be put into the braking work of the system.

The pressure supply loop also comprises an electro-hydraulic proportional valve 6, a first throttling valve 9, an overflow valve 10 and an electromagnetic directional valve 12; the electromagnetic directional valve 12 is respectively connected with the electro-hydraulic proportional valve 6, the first throttle valve 9 and the overflow valve 10; the first throttle valve 9 is arranged at one side of the second one-way valve 7, the second throttle valve 17 is further arranged between the electromagnetic directional valve 12 and the overflow valve 10, delayed braking and power-off protection of the system can be realized through adjustment of the throttle valve and the overflow valve 10, and when the brake device is used, the hydraulic control system adjusts the working oil pressure of the brake oil cylinder through the overflow valve 10 or the electro-hydraulic proportional valve 6 according to the required braking torque, so that a proper oil pressure is obtained, and the positive pressure required by braking is adjusted. When the positive pressure is applied to the brake disc, the friction braking force is generated on the surface of the brake disc so as to generate braking torque, thereby adjusting the magnitude of the braking torque.

The pressure supply loop further comprises a main overflow valve 11, the main overflow valve 11 is arranged between the energy accumulator 16 and the first one-way valve 3, and the main overflow valve 11 is used for limiting the highest pressure of the whole hydraulic system so as to protect the safety of the whole system.

In the above embodiment, the gear pump 3 is connected with the motor 2; a third one-way valve 19 is also arranged between the manual hydraulic pump 15 and the manual reversing valve 8; the manual reversing valve 8 is also provided with a third throttle valve 18 in a connecting way.

This disk arresting gear pressure retaining type hydraulic control system contains five working processes according to the service behavior: brake release, normal parking, overspeed braking, sudden system power failure and emergency braking. Except for the condition of sudden power failure of the system, in each of other working processes, after the hydraulic control system collects and analyzes data through the pressure sensor and automatically operates through an instruction sent by the electric control system, the relevant hydraulic valves start to work to realize the functions required by the system.

The working principle is as follows:

and (3) a brake releasing process: after the hydraulic control system receives a brake release instruction, the electromagnetic directional valve 12 is electrified, the oil pump works, the current in the electro-hydraulic proportional valve 6 is gradually increased, the oil pressure is increased, the energy accumulator 16 is filled with liquid, and the braking torque of the braking device is reduced.

And (4) normal parking: after the hydraulic control system receives a normal parking instruction, the current in the electro-hydraulic proportional valve 6 is changed according to the requirement of the electric control system to adjust the oil pressure and the braking torque so as to enable the parking deceleration of the conveyor to be kept at 0.1-0.3 m/s²When the conveyor stops running, the motor 2 and the electro-hydraulic proportional valve 6 are powered off, and the system stops working.

And (3) working and braking: in the running process of the conveyor, if overspeed is caused by some reason, the speed measurement sensor transmits a signal to the electric control system, the electric control system sends a control signal to reduce the current of the electro-hydraulic proportional valve 6 and apply braking force, and when the conveyor reaches a stable running speed, the electric control system controls the oil pressure to release braking.

Emergency braking or sudden system outage: when the conveyor receives an emergency stop instruction or the system is suddenly powered off, the motor 2, the electro-hydraulic proportional valve 6 and the electromagnetic directional valve 12 are powered off, the oil pressure of the system is reduced to a set value through the overflow valve 10, the brake is quickly attached to a brake disc through idle stroke, the oil of the energy accumulator 16 and the brake is relieved through the throttle valve, the braking torque is increased, and the conveyor is slowly stopped.

In conclusion, the system adopts electro-hydraulic proportional control, stepless pressure regulation can be realized, the boosting and pressure reducing processes are stable and rapid, the performance of the system is improved, and manual emergency brake release can be realized during system fault maintenance through a manual hydraulic pump.

The system adopts a double-loop pressure-maintaining type hydraulic station, and after the system automatically operates and the system pressure reaches a working set high-point value, the motor automatically cuts off the power supply; after the system pressure is reduced to a working set low-point value, the motor is automatically electrified and operated; the heat generated during the operation of the system is reduced by the repeated operation, and the service life of each part is effectively protected.

The disc type controllable braking device is provided with a pressure maintaining type hydraulic pump station, and the hydraulic pump station is provided with a pressure sensor; the hydraulic pump station is provided with an emergency brake release loop by adopting a pressure maintaining double-loop structure, so that the pressure maintaining time of a manual brake release function is not less than 6 hours; the hydraulic system has a hydraulic failure protection function; the brake can still ensure the belt conveyor to smoothly decelerate and stop when the system is suddenly powered off by the accumulator.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.