CN203864670U - Land leveler double-loop running braking hydraulic system - Google Patents
Land leveler double-loop running braking hydraulic system Download PDFInfo
- Publication number
- CN203864670U CN203864670U CN201420217600.9U CN201420217600U CN203864670U CN 203864670 U CN203864670 U CN 203864670U CN 201420217600 U CN201420217600 U CN 201420217600U CN 203864670 U CN203864670 U CN 203864670U
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- valve
- mouth
- energy storage
- oil
- relay valve
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- Expired - Lifetime
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- 238000004146 energy storage Methods 0.000 claims description 45
- 239000007788 liquid Substances 0.000 abstract description 15
- 239000003921 oil Substances 0.000 abstract 12
- 239000010720 hydraulic oil Substances 0.000 abstract 1
- 239000012530 fluid Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000002828 fuel tank Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 150000002843 nonmetals Chemical class 0.000 description 1
Abstract
The utility model discloses a land leveler double-loop running braking hydraulic system which comprises a gear pump, a liquid injecting valve, an energy accumulator I, an energy accumulator II, a foot braking valve, a relay valve I, a relay valve II, a front brake oil cylinder, a rear brake oil cylinder and a hydraulic oil tank. The gear pump injects liquid into the energy accumulators through the liquid injecting valve. When the pressure of oil liquid in the energy accumulators reaches the preset liquid injecting pressure of the liquid injecting valve, the liquid injecting valve stops injecting liquid, and the oil liquid provided by the gear pump is supplied to other loops. When the foot braking valve acts, the foot braking valve outputs two ways of control pressure oil, the two ways of pressure oil respectively enter pilot oil ports of the two relay valves to open the two relay valves, at the moment, the pressure oil in the two energy accumulators respectively flow through the two relay valves to enter the front brake oil cylinder and the rear brake oil cylinder respectively to achieve running braking action. The system can provide large-flow pressure oil for the brake oil cylinders quickly and meet the quick running braking requirement.
Description
Technical field
The utility model relates to a kind of road grader service brake hydraulic efficiency pressure system, specifically a kind of road grader double loop service brake hydraulic efficiency pressure system.
Background technology
Along with the develop rapidly of China's economic construction, demand to the energy, electric power, non-metals increases day by day, directly cause the prosperity of colliery, iron ore, nonferrous metals ore industry, open cast mine accounts for suitable high range, low with cost of winning, safe, convenient transportation and riveting the attention from all fields, in mining, convenient transportation is with regard to demand high-power road grader road pavement cleaning and smooth in the open, and high-power road grader is just occurred by the important accessory equipment as colliery in this case.
When the operation of high-power road grader, crank motion determines the frequency of braking frequently, and the quality of deceleration and stopping performance directly has influence on the work efficiency of complete machine, is also related to the safety of the person and property simultaneously.The rear axle brake vi total displacement mating due to high-power road grader is greater than 300ml conventionally; its travel or working condition under; traditional road grader service brake hydraulic efficiency pressure system cannot reach the effect of stepping on foot brake valves pedal and complete machine is braked immediately completely; conventionally have the delay time about 5 seconds; need the time about 5 seconds at the built-in service brake pressure presetting that erects of drg oil cylinder, cannot meet vehicle driving brake request.
Summary of the invention
The problem existing for above-mentioned prior art, the utility model provides a kind of road grader double loop service brake hydraulic efficiency pressure system, can be fast for drg oil cylinder provides large flow pressure oil, meet the requirement of dispatch driving braking.
To achieve these goals, a kind of road grader double loop service brake of the utility model hydraulic efficiency pressure system, comprises gear type pump, prefill valve, energy storage I, energy storage II, foot brake valves, relay valve I, relay valve II, front brake oil cylinder, rear brake oil cylinder and hydraulic reservoir; Described gear type pump one end is connected with hydraulic reservoir, and the other end is connected with the P mouth of prefill valve, and A1, the A2 mouth of prefill valve are connected with energy storage II with energy storage I respectively, and the T mouth of prefill valve is connected with hydraulic reservoir; P1, the P2 mouth of described foot brake valves are connected with energy storage II with energy storage I respectively, and A1, the A2 mouth of foot brake valves are connected with the PP mouth of relay valve I and the PP mouth of relay valve II respectively, and T1, the T2 mouth of foot brake valves are connected with hydraulic reservoir; The P mouth of described relay valve I, the P mouth of described relay valve II are connected with energy storage II with energy storage I respectively, the A mouth of relay valve I, the A mouth of relay valve II are connected with rear brake oil cylinder with front brake oil cylinder respectively, and the T mouth of relay valve I, the T mouth of relay valve II are connected with hydraulic reservoir.
Further, also comprise by pass valve, the P mouth of described by pass valve is connected with gear type pump, and the T mouth of by pass valve is connected with hydraulic reservoir.
Preferably, energy storage I and energy storage II are piston accumulator.
The utility model is owing to having adopted such scheme, in the time carrying out service brake action, the energy storage internal pressure oil relay valve of flowing through directly enters in drg oil cylinder, the foot brake valves of no longer flowing through, because foot brake valves can only be arranged on fixed position, and energy storage and relay valve do not limit to installation site, can be arranged near the drg of front and back, like this, energy storage internal pressure oil can arrive in drg oil cylinder fast, realizes dispatch driving braking, moreover, the logical oil mass of relay valve is large, for dispatch driving braking is given security.Therefore this service brake hydraulic efficiency pressure system can, fast for drg oil cylinder provides large flow pressure oil, meet high-power road grader service brake requirement.
Brief description of the drawings
Fig. 1 is hydraulic schematic diagram of the present utility model.
In figure: 1, gear type pump, 2, by pass valve, 3, prefill valve, 4-1, energy storage I, 4-2, energy storage II, 5, foot brake valves, 6-1, relay valve I, 6-2, relay valve II, 7, front brake oil cylinder, 8, rear brake oil cylinder, 9, hydraulic reservoir.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is described in further detail.
As shown in Figure 1, the utility model road grader double loop service brake hydraulic efficiency pressure system, comprises gear type pump 1, prefill valve 3, energy storage I 4-1, energy storage II 4-2, foot brake valves 5, relay valve I 6-1, relay valve II 6-2, front brake oil cylinder 7, rear brake oil cylinder 8 and hydraulic reservoir 9; Described gear type pump 1 one end is connected with hydraulic reservoir 9, the other end is connected with the P mouth of prefill valve 3, A1, the A2 mouth of prefill valve 3 are connected with energy storage II 4-2 with energy storage I 4-1 respectively, and the T mouth of prefill valve 3 is connected with hydraulic reservoir 9, and the O mouth of prefill valve 3 is connected to other loops; P1, the P2 mouth of described foot brake valves 5 are connected with energy storage II 4-2 with energy storage I 4-1 respectively, A1, the A2 mouth of foot brake valves 5 are connected with the PP mouth of relay valve II 6-2 with the PP mouth of relay valve I 6-1 respectively, and T1, the T2 mouth of foot brake valves 5 are connected with hydraulic reservoir 9; The P mouth of described relay valve I 6-1, the P mouth of described relay valve II 6-2 are connected with energy storage II 4-2 with energy storage I 4-1 respectively, the A mouth of relay valve I 6-1, the A mouth of relay valve II 6-2 are connected with rear brake oil cylinder 8 with front brake oil cylinder 7 respectively, and the T mouth of relay valve I 6-1, the T mouth of relay valve II 6-2 are connected with hydraulic reservoir 9.
Further, the utility model also comprises by pass valve 2, and the P mouth of described by pass valve 2 is connected with gear type pump 1, and the T mouth of by pass valve 2 is connected with hydraulic reservoir 9.If oil liquid pressure is higher than by pass valve 2 preheating setting pressures or other loop oil liquid pressures during higher than by pass valve 2 preheating setting pressure in energy storage I 4-1 and energy storage II 4-2 topping up process, by pass valve 2 is opened, high pressure fluid overflows back fuel tank 9, thus ensure this system avoid high-voltage oil liquid impact.
Preferably, the utility model energy storage I 4-1 and energy storage II 4-2 are piston accumulator, and its delivery pressure speed oil is fast, and response time is short.
Principle of work, gear type pump 1 carries out topping up by prefill valve 3 for energy storage I 4-1 and energy storage II 4-2, in the time that energy storage I 4-1 and energy storage II 4-2 inner fluid pressure reach prefill valve 3 and preset supercharging pressure, prefill valve 3 stops topping up, and the fluid that gear type pump 1 is provided is supplied with other loops, if oil liquid pressure is higher than by pass valve 2 preheating setting pressures or other loop oil liquid pressures during higher than by pass valve 2 preheating setting pressure in energy storage I 4-1 and energy storage II 4-2 topping up process, by pass valve 2 is opened, high pressure fluid overflows back fuel tank 9, thereby ensure this system avoid high-voltage oil liquid impact, in the time that foot brake valves 5 moves, foot brake valves 5 is exported two-way control presssure oil, guide's hydraulic fluid port that two-way pressure oil enters respectively relay valve I 6-1 and relay valve II 6-2 i.e. PP mouth in figure, relay valve I 6-1 and relay valve II 6-2 are opened, now, do not flow through relay valve I 6-1 and relay valve II 6-2 of energy storage I 4-1 and energy storage II 4-2 internal pressure oil content enters in front brake oil cylinder 7 and rear brake oil cylinder 8, realizes service brake action.
Claims (3)
1. a road grader double loop service brake hydraulic efficiency pressure system, it is characterized in that, comprise gear type pump (1), prefill valve (3), energy storage I (4-1), energy storage II (4-2), foot brake valves (5), relay valve I (6-1), relay valve II (6-2), front brake oil cylinder (7), rear brake oil cylinder (8) and hydraulic reservoir (9);
Described gear type pump (1) one end is connected with hydraulic reservoir (9), the other end is connected with the P mouth of prefill valve (3), A1, the A2 mouth of prefill valve (3) are connected with energy storage II (4-2) with energy storage I (4-1) respectively, and the T mouth of prefill valve (3) is connected with hydraulic reservoir (9); P1, the P2 mouth of described foot brake valves (5) are connected with energy storage II (4-2) with energy storage I (4-1) respectively, A1, the A2 mouth of foot brake valves (5) are connected with the PP mouth of relay valve II (6-2) with the PP mouth of relay valve I (6-1) respectively, and T1, the T2 mouth of foot brake valves (5) are connected with hydraulic reservoir (9); The P mouth of described relay valve I (6-1), the P mouth of described relay valve II (6-2) are connected with energy storage II (4-2) with energy storage I (4-1) respectively, the A mouth of relay valve I (6-1), the A mouth of relay valve II (6-2) are connected with rear brake oil cylinder (8) with front brake oil cylinder (7) respectively, and the T mouth of relay valve I (6-1), the T mouth of relay valve II (6-2) are connected with hydraulic reservoir (9).
2. a kind of road grader double loop service brake hydraulic efficiency pressure system according to claim 1, is characterized in that, also comprises by pass valve (2), and the P mouth of described by pass valve (2) is connected with gear type pump (1), and the T mouth of by pass valve (2) is connected with hydraulic reservoir (9).
3. a kind of road grader double loop service brake hydraulic efficiency pressure system according to claim 1 and 2, is characterized in that, described energy storage I (4-1) and energy storage II (4-2) are piston accumulator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217600.9U CN203864670U (en) | 2014-04-30 | 2014-04-30 | Land leveler double-loop running braking hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420217600.9U CN203864670U (en) | 2014-04-30 | 2014-04-30 | Land leveler double-loop running braking hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203864670U true CN203864670U (en) | 2014-10-08 |
Family
ID=51645653
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420217600.9U Expired - Lifetime CN203864670U (en) | 2014-04-30 | 2014-04-30 | Land leveler double-loop running braking hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203864670U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105083248A (en) * | 2015-09-01 | 2015-11-25 | 杭叉集团股份有限公司 | Service braking system |
| CN105128843A (en) * | 2015-10-16 | 2015-12-09 | 深圳市德塔电动汽车科技有限公司 | Braking hydraulic system |
| CN105774784A (en) * | 2014-12-22 | 2016-07-20 | 中冶宝钢技术服务有限公司 | Full-hydraulic braking system used for tank truck and tank truck |
| CN106351899A (en) * | 2016-11-11 | 2017-01-25 | 三汽车制造有限公司 | Auxiliary hydraulic pressure system and pumping machine |
| CN106696934A (en) * | 2015-08-12 | 2017-05-24 | 中冶宝钢技术服务有限公司 | Hydraulic brake system of slag pot carrier |
| CN107298085A (en) * | 2017-08-07 | 2017-10-27 | 包头市北工机械有限公司 | A kind of normally closed type explosion-proof wet brakes |
| CN113165624A (en) * | 2018-12-14 | 2021-07-23 | 凯斯纽荷兰(中国)管理有限公司 | Hydraulic brake device for non-road vehicle |
-
2014
- 2014-04-30 CN CN201420217600.9U patent/CN203864670U/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105774784A (en) * | 2014-12-22 | 2016-07-20 | 中冶宝钢技术服务有限公司 | Full-hydraulic braking system used for tank truck and tank truck |
| CN106696934A (en) * | 2015-08-12 | 2017-05-24 | 中冶宝钢技术服务有限公司 | Hydraulic brake system of slag pot carrier |
| CN105083248A (en) * | 2015-09-01 | 2015-11-25 | 杭叉集团股份有限公司 | Service braking system |
| CN105128843A (en) * | 2015-10-16 | 2015-12-09 | 深圳市德塔电动汽车科技有限公司 | Braking hydraulic system |
| CN105128843B (en) * | 2015-10-16 | 2018-05-18 | 深圳市德塔防爆电动汽车有限公司 | Hydraulic braking system |
| CN106351899A (en) * | 2016-11-11 | 2017-01-25 | 三汽车制造有限公司 | Auxiliary hydraulic pressure system and pumping machine |
| CN107298085A (en) * | 2017-08-07 | 2017-10-27 | 包头市北工机械有限公司 | A kind of normally closed type explosion-proof wet brakes |
| CN113165624A (en) * | 2018-12-14 | 2021-07-23 | 凯斯纽荷兰(中国)管理有限公司 | Hydraulic brake device for non-road vehicle |
| CN113165624B (en) * | 2018-12-14 | 2024-02-02 | 凯斯纽荷兰工业(哈尔滨)机械有限公司 | Hydraulic brake device for off-road vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |