Hydraulic braking system
By designing a hydraulic suppression system, using dual -loop liquid -charging valves and storage device to maintain stable braking oil pressure, solve the fault and wet brakes and wet brakes caused by the long and poor road conditions in the underground mines in the underground mine. The problem of poor sliding braking has realized the effective braking and emergency braking functions of the vehicle.
Patent Information
- Application Number
- CN202420738458.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-11
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-04-11
AI Technical Summary
When the mine transport vehicle is running in an underground mine, due to long braking distance, poor road conditions and slippery road surfaces, the existing braking system is difficult to provide high-pressure oil, resulting in the vehicle losing effective braking capacity, and brake failure and wetness. The problem of insufficient braking on the sliding road surface.
A hydraulic suppression system is designed, including the fuel tank, hydraulic oil pump, dual -loop liquid valve, capacity and wet brakes. The common effect of dual -circuit liquid valve and storage device will be maintained to maintain stability Effective braking control is achieved through foot brake valves and parking brake valves.
The liquid pressure braking system can maintain stable braking oil pressure within the safety range, ensure that the vehicle can effectively brake when needed, avoid hidden dangers caused by brake failure or slippery roads, and provide emergency braking functions.
Smart Images
Figure CN222408219U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a hydraulic brake system. Background Art
[0002] As a means of transportation underground in coal mines, the braking system of a mining transport vehicle is an important part of underground operations and is related to the life safety of people in the vehicle and underground workers.
[0003] Due to the narrow tunnels in underground mines, poor road conditions, and water seepage in mines, on the one hand, the vehicle braking distance is long and frequent braking is required, which can easily cause insufficient air supply pressure from the compressor and brake failure. On the other hand, the underground road surface is slippery and the existing braking system cannot provide high-pressure oil, which can easily cause the vehicle to lose effective braking ability. Summary of the invention
[0004] In order to solve the above technical problems, the utility model is a hydraulic brake system, and its technical solution is as follows:
[0005] It includes an oil tank and a hydraulic oil pump, the input end of the hydraulic oil pump is connected to the oil tank, an oil suction filter is installed on the input pipeline of the hydraulic oil pump, the output end of the hydraulic oil pump is connected to the P port of the dual-circuit filling valve, the two outlets of the dual-circuit filling valve are connected to two accumulators, each accumulator is connected to the oil inlet of the foot brake valve, and the oil outlet of the foot brake valve is respectively connected to the oil inlet of the driving oil chamber of the front wheel wet brake and the rear wheel wet brake;
[0006] The parking brake valve is connected to the pipeline between the front axle brake accumulator and the foot brake valve, and the parking brake valve is connected to the parking and emergency brakes through the handle valve.
[0007] Furthermore, the SW port of the dual-circuit filling valve is used as a low-pressure alarm switch, and an electronic alarm can be connected when necessary, and can be blocked with a plug when not needed.
[0008] Furthermore, the parking brake valve adopts a manually operated control valve.
[0009] Further, the T port of the dual-circuit filling valve, the W port of the handle valve, and the T1 port and the T2 port of the foot brake valve are all connected to the oil tank.
[0010] The beneficial effects of the utility model are as follows: the utility model is a hydraulic brake system, which maintains the brake oil pressure stable within a safe range through the joint action of the dual-circuit filling valve and the accumulator. When working brake is required, the foot brake valve is stepped on, and the pressure oil of the two accumulators enters the front and rear axle wet brakes respectively through the dual-circuit filling valve, pushing the friction plate to press against the brake disc to brake the wheel; the parking brake is an oil-cut parking automatic brake, and the oil brake is opened; the driving brake is a foot brake oil brake, and the vehicle is braked. If the vehicle encounters an emergency during operation and the working brake fails, the manual valve handle can be moved to the brake position to implement emergency braking. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a schematic diagram of the structure of the utility model;
[0012] As shown in the figure, 1 is the oil tank, 2 is the oil suction filter, 3 is the hydraulic oil pump, 4 is the dual-circuit charging valve, 5 is the pressure gauge, 6 is the rear axle brake accumulator, 7 is the front axle brake accumulator, 8 is the parking brake valve, 9 is the foot brake valve, 10 is the parking and emergency brake, 11 is the front wheel wet brake, 12 is the rear wheel wet brake, and 13 is the handle valve. DETAILED DESCRIPTION
[0013] As shown in the figure, the utility model is a hydraulic brake system, which consists of an oil tank 1, an oil suction filter 2, a hydraulic oil pump 3, a dual-circuit filling valve 4, a pressure gauge 5, a rear axle brake accumulator 6, a front axle brake accumulator 7, a parking brake valve 8, a foot brake valve 9, a parking and emergency brake 10, a front wheel wet brake 11, a rear wheel wet brake 12, a handle valve 13 and an oil pipe.
[0014] The torque converter is installed between the engine and the transmission, connected to the hydraulic oil pump shaft, and drives the hydraulic oil pump shaft to rotate. The hydraulic oil pump is connected between the dual-circuit filling valve and the oil tank through an oil pipe. Its oil inlet is connected to the oil tank outlet through an oil suction filter. The oil outlet of the hydraulic oil pump is connected to the P port of the dual-circuit filling valve, and the return oil port T of the dual-circuit filling valve is connected to the oil tank; the O port of the dual-circuit filling valve goes to the P port of the flip mechanism operating valve, pushing the cargo box hydraulic cylinder to move and realize the unloading function. The SW port of the dual-circuit filling valve is used as a low-pressure alarm switch. When needed, an electronic alarm can be connected, and when not needed, it can be blocked with a plug.
[0015] The accumulator is connected between the dual-circuit filling valve and the foot brake valve through an oil pipe. The accumulator includes a front axle brake accumulator 7 and a rear axle brake accumulator 6, wherein the front axle brake accumulator is connected to the A2 port of the dual-circuit filling valve, and the rear axle brake accumulator is connected to the A1 port of the dual-circuit filling valve; the A2 port of the foot brake valve is connected to the front axle wet brake, the P2 port is connected to the front axle brake accumulator, and the T2 port is connected to the oil tank; the A1 port of the foot brake valve is connected to the rear axle wet brake, the P1 port is connected to the rear axle brake accumulator, and the T1 port is connected to the oil tank; the T1 port and the T2 port of the foot brake valve are connected internally. Two pressure gauges 5 are installed at the ends where the foot brake valve is connected to the accumulator.
[0016] The parking brake valve adopts a manual operation control valve. Its oil inlet is connected to the pipeline between the front axle brake accumulator and the front axle wet brake through an oil pipe. The oil outlet T of the parking brake valve is connected to the oil tank, and the L port is connected to the parking and emergency brake through a handle valve; the parking and emergency brake adopts a spring-type mechanical structure brake, and a 30-type wet parking brake is selected, model 80018000B.
[0017] Working process of this utility model:
[0018] ① After the vehicle is started, the working brake hydraulic oil pump placed at the power take-off port of the torque converter rotates, and the hydraulic oil in the hydraulic oil tank enters the hydraulic oil pump through the oil suction filter, and supplies oil to the dual-circuit charging valve. After reaching the opening pressure of the dual-circuit charging valve, the two accumulators that supply fluid to the front and rear axle brakes are pressurized through the dual-circuit charging valve. When the filling pressure reaches the closing pressure value set by the filling valve, the dual-circuit charging valve switches position, the pressure compensator changes position, the filling pressure is cut off, the filling process is completed, and the oil output by the hydraulic oil pump is pressed back to the tank through the T port of the dual-circuit charging valve.
[0019] ② During braking, the brake valve core is repeatedly operated (the brake pedal is pressed), and the pressure oil in the accumulator is consumed. When the pressure of any accumulator is lower than the cut-off pressure by a certain set value, the dual-circuit filling valve flips, the pressure compensator is switched, the filling pressure is restored, and the accumulator is filled with the set flow rate. The remaining flow rate flows to the flip mechanism through the O port to realize the unloading function. This cycle is repeated to complete the entire cycle of filling-braking-refilling. (The dual-circuit filling valve can flip back and forth under different pressures because the action area of the controlled oil at both ends of the filling valve stem is different.)
[0020] The vehicle's braking system is divided into working brake, emergency brake and parking brake system.
[0021] Working brake is used for speed control and parking during regular and general driving. When working brake is needed, step on the foot brake valve, and the pressure oil of the two accumulators enters the front and rear axle wet multi-disc brakes through the dual-circuit brake valves, pushing the friction plates against the brake discs to brake the wheels. Release the foot pedal, the oil in the brake returns to the tank, and the braking state is released.
[0022] The emergency brake and parking brake are combined into one, which is the parking and emergency brake, used for braking after parking or emergency braking when the driving brake fails. The parking brake circuit consists of the parking and emergency brake 10, the parking brake valve 8 and the pipeline. After the vehicle starts, the parking brake valve 8 is pulled after the value of the brake pressure gauge is greater than the release pressure of the brake, and the manual reversing handle is moved to the release position. The pressure oil acts on the brake, the parking brake is released, and the vehicle can be operated. After parking, the manual reversing handle of the parking brake valve 8 is pulled back to the braking position, the pressure oil is cut off, and the oil in the brake returns to the oil tank through the T port of the parking brake valve 8. Under the action of the spring force, the brake friction plate is locked and the vehicle is braked. When the vehicle encounters an emergency during operation and the working brake fails, the handle valve 13 of the parking brake valve 8 can be moved to the braking position to implement emergency braking.
[0023] The above description is only a preferred implementation of the present invention, but the present invention is not limited to the above embodiments. As long as the technical effects of the present invention are achieved by any same or similar means, they should fall within the protection scope of the present invention.
Claims
1. A hydraulic brake system, comprising an oil tank and a hydraulic oil pump, wherein the input end of the hydraulic oil pump is connected to the oil tank, characterized in that: An oil suction filter is installed on the input pipeline of the hydraulic oil pump, the output end of the hydraulic oil pump is connected to the P port of the dual-circuit charging valve, the two outlets of the dual-circuit charging valve are connected to two accumulators, each accumulator is connected to the oil inlet of the foot brake valve, and the oil outlet of the foot brake valve is connected to the oil inlet of the driving oil chamber of the front wheel wet brake and the rear wheel wet brake respectively; The parking brake valve is connected to the pipeline between the front axle brake accumulator and the foot brake valve, and the parking brake valve is connected to the parking and emergency brakes through the handle valve.
2. A hydraulic brake system according to claim 1, characterized in that: The SW port of the dual-circuit filling valve is used as a low-pressure alarm switch. An electronic alarm can be connected when needed, and it can be blocked with a plug when not needed.
3. A hydraulic brake system according to claim 1, characterized in that: The parking brake valve adopts a manually operated control valve.
4. A hydraulic brake system according to claim 1, characterized in that: The T port of the dual-circuit charging valve, the W port of the handle valve, and the T1 and T2 ports of the foot brake valve are all connected to the oil tank.