Summary of the invention
In view of this, the present invention brakes by gas-liquid mixed, has reduced production and the use cost of brake system, and whole system can provide larger braking force simultaneously, can be applicable to large-tonnage mine car.
For achieving the above object, concrete technical scheme is as follows:
On the one hand, a kind of gas-liquid mixed brake structure is provided, be applicable to mine equipment vehicle, comprise service brake, brake cylinder, accumulator unit, braking valve for vehicle, Hydraulic Pump and Parking Brake, described accumulator unit is connected with braking valve for vehicle with described brake cylinder respectively, described brake cylinder is connected with described service brake, described accumulator unit drives described brake cylinder that hydraulic oil is delivered to described service brake, described accumulator unit is controlled the switch of described braking valve for vehicle, described Hydraulic Pump is connected with described Parking Brake by described braking valve for vehicle, described braking valve for vehicle is controlled the break-make of hydraulic circuit between described Hydraulic Pump and described Parking Brake.
Preferably, described accumulator unit comprises storage tank and Air compressor, and described Air compressor is connected with described storage tank, and described storage tank is connected with braking valve for vehicle with described brake cylinder respectively.
Preferably, described accumulator unit also comprises dryer assembly, and described Air compressor is connected with described storage tank by described dryer assembly.
Preferably, between described dryer assembly and storage tank, be also provided with loop protection valve.
Preferably, also comprise parking switch, described storage tank is connected with described braking valve for vehicle by described parking switch.
Preferably, described parking switch is electric-controlled switch.
Preferably, also comprise connected foot brake valves and relay valve, described storage tank is connected with described brake cylinder with relay valve by described foot brake valves successively.
Preferably, the quantity of described storage tank is 2~3.
Preferably, described Hydraulic Pump is also connected with transmission system with lifting control system respectively.
On the other hand, provide a kind of mine equipment vehicle, comprise a kind of gas-liquid mixed brake structure as above.
With respect to prior art, the advantage of technical scheme of the present invention has:
1, adopting gas-liquid mixed brake system to reduce produces and use cost;
2) oil of parking system can also can be used for lifting and transmission system for parking, and a pump is multiplex;
3) simple to operate, whole system can provide larger braking force simultaneously, can be applicable to large-tonnage mine car.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Embodiment based in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the present invention can combine mutually.
Below with reference to accompanying drawing, embodiments of the invention are done to concrete explaination.
A kind of gas-liquid mixed brake structure of embodiments of the invention as shown in Figure 1, be applicable to mine equipment vehicle, be applicable to mine equipment vehicle, comprise service brake 1, brake cylinder 2, accumulator unit, braking valve for vehicle 9, Hydraulic Pump 8 and Parking Brake 7.
Accumulator unit is connected with braking valve for vehicle 9 with brake cylinder 2 respectively.Brake cylinder 2 is connected with service brake 1, and accumulator unit drives brake cylinder 2 that hydraulic oil is delivered to service brake 1.Accumulator unit is controlled the switch of braking valve for vehicle 9, and Hydraulic Pump 8 is connected with Parking Brake 7 by braking valve for vehicle 9, and braking valve for vehicle 9 is controlled the break-make of hydraulic circuit between Hydraulic Pump 8 and Parking Brake 7.
Embodiments of the invention are braked by gas-liquid mixed, have reduced production and use cost, and whole system can provide larger braking force simultaneously, can be applicable to large-tonnage mine car.
As shown in fig. 1, in an embodiment of the present invention, accumulator unit comprises storage tank 5, Air compressor 10, dryer assembly 11.Between dryer assembly 11 and storage tank 5, be also provided with loop protection valve 12.
In addition, storage tank 5 is connected with braking valve for vehicle 9 by parking switch 6.Storage tank 5 is connected with brake cylinder 2 with relay valve 3 by foot brake valves 4 successively.
As shown in fig. 1, the mode of operation at embodiments of the invention comprises braking during standstill and service braking.After vehicle launch, Hydraulic Pump 8 is worked respectively with Air compressor 10, and Air compressor 10 is inflated to storage tank 5 by dryer assembly 11, loop protection valve 12, Air compressor off-load when air pressure reaches setting pressure.Hydraulic Pump 8 is to braking valve for vehicle 9 fuel feeding simultaneously to lifting guide or transmission system fuel feeding.
1, braking during standstill is implemented and is removed:
1.1, when braking during standstill is implemented, pressing parking switch 6 makes it at enforcing location, control gas circuit by storage tank 5 to braking valve for vehicle 9 disconnects, braking valve for vehicle 9 is closed, make the high pressure oil of Hydraulic Pump 8 cannot arrive Parking Brake 7, the fluid of Parking Brake 7 is by braking valve for vehicle 9 oil sump tanks, and the moving drg 7 of parking is implemented parking under the effect of contained spring.
1.2, when braking during standstill is removed, pressing parking switch 6 makes it remove position, by storage tank 5, to the control gas circuit of braking valve for vehicle 9, connected, open braking valve for vehicle 9, make the high pressure oil of Hydraulic Pump 8 arrive Parking Brake 7 by braking valve for vehicle 9, the Compress Spring that promotes Parking Brake 7 is removed parking.
2, the enforcement of service braking and releasing
2.1, when implementation is braked by stepping on foot brake valves 4, the output gas circuit that foot brake valves 4 is opened after opening simultaneously acts on relay valve 3, relay valve 3 is opened, the pressurized air of storage tank 5 is applied on brake cylinder 2 by relay valve 3, promote the piston of brake cylinder 2, piston promotes hydraulic oil to service brake 1 implementation braking.
2.2, when removing service braking, unclamp foot brake valves 4, make foot brake valves 4 close relay valve 3 simultaneously, owing to there is no the effect of pilot control gas circuit, relay valve 3 cuts out, the make pressurized air of brake cylinder 2 under the effect of contained spring is discharged in air by relay valve 3, and the fluid of service brake 1 returns to brake cylinder 2, and service brake 1 solves service braking.
In addition, as shown in Figure 2, in an embodiment of the present invention, parking switch 6 is the electric-controlled switch of electromagnetic valve form.The quantity of storage tank 5 is that 3, the quantity of relay valve 3 are 2, makes forward and backward service brake respectively by storage tank 5 air feed independently separately, improves braking effect.In addition, also preferably include emergency stop switch and/or jogging brake switch, make it to possess as functions such as emergency braking jogging brakings.
Embodiments of the invention parking is removed and is adopted Hydraulic Pump fuel feeding to remove, air operated control braking valve for vehicle; Braking valve for vehicle is except return other system fuel feeding such as lifting guide to parking system fuel feeding; Service braking adopts air operated control, and pressurized air promotes brake cylinder, by brake cylinder, exports fluid to drg.
In embodiments of the invention, also comprise a kind of mine equipment vehicle, be provided with a kind of gas-liquid mixed brake structure described above.Because above-mentioned a kind of gas-liquid mixed brake structure has above-mentioned technique effect, therefore, the mine equipment vehicle that is provided with this kind of gas-liquid mixed brake structure also should possess corresponding technique effect, and its specific implementation process is similar to the above embodiments, does not hereby repeat.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.