CN102561446A - Hydraulic control system of carry scraper - Google Patents
Hydraulic control system of carry scraper Download PDFInfo
- Publication number
- CN102561446A CN102561446A CN2012100138169A CN201210013816A CN102561446A CN 102561446 A CN102561446 A CN 102561446A CN 2012100138169 A CN2012100138169 A CN 2012100138169A CN 201210013816 A CN201210013816 A CN 201210013816A CN 102561446 A CN102561446 A CN 102561446A
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- valve
- pump
- oil supply
- duplex gear
- gear pump
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- Non-Deflectable Wheels, Steering Of Trailers, Or Other Steering (AREA)
- Power Steering Mechanism (AREA)
Abstract
The invention discloses a hydraulic control system of a carry scraper, wherein the system is provided with two steering brake oil supply systems, one of the two steering brake oil supply systems is a brake steering oil supply system taking a duplex gear pump as power, and the other of the two steering brake oil supply systems is a brake steering standby oil supply system taking an electric hydraulic pump as power, the standby oil supply system comprises an electric hydraulic pump and an electromagnetic reversing valve, the electric hydraulic pump is connected between a right pump of the duplex gear pump and a surge check valve in parallel, the electromagnetic reversing valve is serially connected on a main oil way from the surge check valve to a double-acting pilot valve and a sequence valve, one path of the electromagnetic reversing valve is connected with the left pump of the duplex gear pump in parallel for flowing toward a steering control valve, and a reverse check valve is arranged on each of the two branches of the duplex gear pump and the branch of the electric hydraulic pump. According to the hydraulic control system of the carry scraper, the technical problem that the carry scraper cannot be quickly started or steered in case of a failure of the current hydraulic system is solved, and the hydraulic control system is simple in structure and works reliably, so that the hydraulic control system can be extensively applied on vehicles adopting similar hydraulic systems.
Description
Technical field
The present invention relates to a kind of scraper hydraulic control system, particularly relate to the braking and the knuckle section of this hydraulic system.
Background technology
The knuckle section of scraper hydraulic system commonly used, is controlled through steering control valve and to be turned to moving of oil cylinder piston to realize turning to of scraper to steering control valve by the left oil pump feed of duplex gear pump; Brake portion by the right oil pump feed of duplex gear pump through prefill valve to the foot brake valve, through the opening and closing of foot brake valve control brake, realize that the scraper walking perhaps stops.
Also have a manual pump to be parallel between foot brake valve and the brake on the brake portion; When this hydraulic system commonly used runs into fault, when promptly duplex gear pump can not normal fuel injection, buy oil to system with manual pump; Owing in the prefill valve a reverse one way valve is arranged; Manual pump just one the tunnel is bought oil to the accumulator topping up, and one the tunnel buys oil to brake, and brake is opened.Scraper just can reach home like this.But adopt the manual pump fuel feeding, promptly use leverage all to require great effort very much, particularly when the oil pressure in the accumulator was not enough, let hydraulic system have enough hydraulic couplings that brake is opened needed play oil more than 100 time, and labour intensity is very big, special again time-consuming.And this hydraulic system can only open brake, can not give steering control valve by fuel feeding, makes to turn to the oil cylinder operate as normal.When being out of order in the tunnel of scraper in bending, just can not come out.
In order to solve the problem that above-mentioned hydraulic system exists when fuel feeding breaks down, there is the people that original manual pump is replaced with electric hydraulic pump.Though such hydraulic system can let scraper start fast when breaking down, adopt the scraper of this hydraulic system in underground passage, can not turn.
Summary of the invention
The purpose of this invention is to provide a kind of simple in structure, and the scraper hydraulic control system that when breaking down, can make scraper start fast and turn to.
This scraper hydraulic control system provided by the invention; Comprise duplex gear pump, steering control valve, turn to oil cylinder, prefill valve, foot brake valve, brake, double acting pilot valve and sequence valve; Duplex gear pump one road fuel feeding is given steering control valve; Turn to the piston of oil cylinder to move by steering control valve control and realize turning to of scraper; Another road flows to the foot brake valve through prefill valve, controls opening and closing of brake by the foot brake valve, and forming a cover is the skid steer oil supply system of power with the duplex gear pump; It is characterized in that also having a cover is the subsequent use oil supply system of skid steer of power with the electric hydraulic pump; This subsequent use oil supply system comprises an electric hydraulic pump, a solenoid operated directional valve, and electric hydraulic pump is connected in parallel between the right pump and prefill valve of duplex gear pump, and solenoid operated directional valve is connected on the working connection of prefill valve to double acting pilot valve and sequence valve; The left parallel connection of pumps of one tunnel and duplex gear pump of solenoid operated directional valve flows to steering control valve, on two branch roads of duplex gear pump and the electric hydraulic pump branch road a reverse one way valve has been installed respectively.
The present invention has formed the subsequent use oil supply system of a cover owing to increased an electric hydraulic pump, a reverse battery valve and reverse one way valve on the basis of existing technology.Under the normal condition, electric hydraulic pump is closed, and can not disturb the main oil supply system operate as normal that is driven by duplex gear pump, and when main oil supply system broke down, the subsequent use oil supply system that electric hydraulic pump drives started, and scraper can be started and turn to fast.The present invention only needs an electric hydraulic pump just can successively give brake and steering oil oil supply cylinder; The use member is few; Overcome the prior art technological deficiency that scraper can not start fast and turn to when hydraulic system breaks down, the vehicle that the present invention is simple in structure in addition, reliable operation can be widely used in adopting similar hydraulic system.
Below in conjunction with the accompanying drawing and the specific embodiment detailed structure of the present invention is further described.
Description of drawings
Fig. 1 is the scraper hydraulic system principle figure.
The specific embodiment
Scraper hydraulic system as can beappreciated from fig. 1 of the present invention has lifting cylinder 1, scraper bowl control valve 2, turns to oil cylinder 3, charging pump 4, accumulator 5, oil pressure gauge 6, solenoid operated directional valve 7, foot brake valve 8, cooler 9, sequence valve 10, brake 11, reverse one way valve 12, duplex gear pump 13, main pump 14, steering control valve 15, double acting pilot valve 16, bucket cylinder 17, electric hydraulic pump 18,.Wherein main pump 14 fuel feeding are given scraper bowl control valve 2, and the motion of control lifting cylinder 1 and bucket cylinder 17 scraper bowls is turned over and discharging on the up-down of realization swing arm or the scraper bowl; The motion of double acting pilot valve 16 control scraper bowl control valves 2 is given in prefill valve 4 oil returns.
It can also be seen that from Fig. 1 the oil supply system that turns to and brake has two covers, a cover is to be the skid steer oil supply system of power with duplex gear pump 13, and another set of is to be the subsequent use oil supply system of skid steer of power with electric hydraulic pump 18.
With duplex gear pump 13 is that the formation of the skid steer oil supply system of power is: duplex gear pump 13 one road fuel feeding are given steering control valve 15, turn to moving of oil cylinder 3 pistons to realize turning to of scraper by steering control valve 15 controls.Accumulator 5 topping ups are given through prefill valve 4 in another road, give brake 11, fuel feeding, after accumulator 5 is full of pressure oil and reaches setting pressure; Control valve 41 switching-overs in the prefill valve 4 are closed towards the passage of accumulator 5, and the execution valve 42 in the prefill valve 4 also commutates simultaneously; Connect sequence valve 10 and double acting pilot valve 16, hydraulic oil one road flows to double acting pilot valve 16, and unnecessary pressure oil is through sequence valve 10; Behind subcooler 9, flow to brake 11 again, flow to fuel tank at last; When needs release brake 11 lets the scraper walking, keep the foot brake valve 8 residing valve position that go up among the figure, hydraulic oil flow makes the scraper walking toward brake 11; Step on service brake, make foot brake valve 8 be in following valve position among the figure, then the hydraulic pressure in the brake 11 flow to fuel tank, and brake begins braking, scraper stop motion.
With electric hydraulic pump 18 is that the subsequent use oil supply system of the skid steer of power constitutes and is: electric hydraulic pump 18 is parallel between duplex gear pump 13 and the prefill valve 4, on the right pump branch road of electric hydraulic pump 18 and duplex gear pump 13 a reverse one way valve 12 has been installed respectively; Prefill valve 4 solenoid operated directional valve 7 of having connected to the oil circuit of double acting pilot valve 16 and sequence valve 10, one road normal fuel injection of solenoid operated directional valve 7 is given double acting pilot valve 16 and sequence valve 10, and another road fuel feeding is given steering control valve 15.When system's operate as normal; When promptly being the skid steer oil supply system operate as normal of power with duplex gear pump 13; Solenoid operated directional valve 7 hydraulic oil flows are toward double acting pilot valve 16 and sequence valve 10, and electric hydraulic pump 18 is closed, and can not influence the operate as normal of system; And because this branch road has the existence of reverse one way valve 12, system can not influence the work of electric hydraulic pump yet.When this skid steer oil supply system ran into fault, when promptly duplex gear pump 13 can not normal fuel injection, the skid steer back-up system started; This moment the electric hydaulic pump startup; Hydraulic oil is given accumulator topping up and brake charging through prefill valve, brake 11 is opened, when the pressure in the accumulator reaches setting pressure; Accumulator cuts out automatically, gives brake 11 pressurizes.This moment, electric hydraulic pump 18 also continue to be given prefill valve 4 topping ups, and the hydraulic coupling that control valve 41 right-hand members in the prefill valve 4 receive is increasing, and the spring force that overcomes left end is turned left spool and pushed away.After the right position of control valve communicates; The control valve 41 of hydraulic oil fluid stopping in prefill valve; The double acting pilot valve of carrying out valve simultaneously communicates with fuel tank; It is zero that control valve 41 is given the hydraulic coupling of carrying out valve 42 left ends, and the spring force that the hydraulic coupling of carrying out valve 42 right-hand members only need overcome left end just can be turned left spool and pushed away.Carry out after valve 42 right oil circuits connect, hydraulic oil one tunnel continues flow direction control valve 41, and the hydraulic coupling of retentive control valve right-hand member is always greater than the spring force of left end; Another road flows to solenoid operated directional valve, and solenoid operated directional valve left side road is connected, and hydraulic oil flows to the braking in a turn valve through solenoid operated directional valve, makes to turn to oil cylinder to open, and controls turning to of scraper.
Claims (1)
1. scraper hydraulic control system; Comprise duplex gear pump (13), steering control valve (15), turn to oil cylinder (3), prefill valve (4), foot brake valve (8), brake (11), double acting pilot valve (16) and sequence valve (10); Duplex gear pump (13) one road fuel feeding are given steering control valve (15); Turn to the piston of oil cylinder (3) to move by steering control valve (15) control and realize turning to of scraper; Another road flows to foot brake valve (8) through prefill valve (4); Control opening and closing of brake (11) by foot brake valve (8); Forming a cover is the skid steer oil supply system of power with duplex gear pump (13), and it is characterized in that also having a cover is the subsequent use oil supply system of skid steer of power with the electric hydraulic pump, and this subsequent use oil supply system comprises an electric hydraulic pump (18), a solenoid operated directional valve (7); Electric hydraulic pump (18) is connected in parallel between the right pump and prefill valve (4) of duplex gear pump (13); Solenoid operated directional valve (7) is connected on the working connection of prefill valve (4) to double acting pilot valve (16) and sequence valve (10), and the left parallel connection of pumps of a tunnel and duplex gear pump (13) of solenoid operated directional valve (7) flows to steering control valve (15), on two branch roads of duplex gear pump, electric hydraulic pump (18) branch road a reverse one way valve (12) has been installed respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210013816.9A CN102561446B (en) | 2012-01-17 | 2012-01-17 | Hydraulic control system of carry scraper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210013816.9A CN102561446B (en) | 2012-01-17 | 2012-01-17 | Hydraulic control system of carry scraper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102561446A true CN102561446A (en) | 2012-07-11 |
| CN102561446B CN102561446B (en) | 2015-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210013816.9A Active CN102561446B (en) | 2012-01-17 | 2012-01-17 | Hydraulic control system of carry scraper |
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| Country | Link |
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| CN (1) | CN102561446B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167246A (en) * | 2018-01-18 | 2018-06-15 | 福建新源重工有限公司 | Frame hydraulic oil circuit |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016839A (en) * | 2007-03-07 | 2007-08-15 | 煤炭科学研究总院太原分院 | Shortwall mining forklift in underground mine |
| CN201613932U (en) * | 2009-12-25 | 2010-10-27 | 鼎盛天工工程机械股份有限公司 | Electric motor pump auxiliary emergency steering hydraulic device for hydraulic steering of engineering vehicles |
| JP2011080540A (en) * | 2009-10-07 | 2011-04-21 | Hitachi Constr Mach Co Ltd | Hydraulic drive unit of wheel type construction machine |
| CN201809391U (en) * | 2010-10-19 | 2011-04-27 | 武汉钢铁(集团)公司 | Skimming machine hydraulic control system |
| CN102050098A (en) * | 2010-12-20 | 2011-05-11 | 中国一拖集团有限公司 | Hydraulic dynamic brake operating system for tractor |
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2012
- 2012-01-17 CN CN201210013816.9A patent/CN102561446B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101016839A (en) * | 2007-03-07 | 2007-08-15 | 煤炭科学研究总院太原分院 | Shortwall mining forklift in underground mine |
| JP2011080540A (en) * | 2009-10-07 | 2011-04-21 | Hitachi Constr Mach Co Ltd | Hydraulic drive unit of wheel type construction machine |
| CN201613932U (en) * | 2009-12-25 | 2010-10-27 | 鼎盛天工工程机械股份有限公司 | Electric motor pump auxiliary emergency steering hydraulic device for hydraulic steering of engineering vehicles |
| CN201809391U (en) * | 2010-10-19 | 2011-04-27 | 武汉钢铁(集团)公司 | Skimming machine hydraulic control system |
| CN102050098A (en) * | 2010-12-20 | 2011-05-11 | 中国一拖集团有限公司 | Hydraulic dynamic brake operating system for tractor |
Non-Patent Citations (3)
| Title |
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| 朱建军等: "飞机牵引车液压***分析", 《机床与液压》 * |
| 潘社卫: "JY-5型多功能服务车液压***的设计", 《矿冶》 * |
| 赵金元: "CY-4铲运机液压***分析与改进", 《矿山机械》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108167246A (en) * | 2018-01-18 | 2018-06-15 | 福建新源重工有限公司 | Frame hydraulic oil circuit |
| CN108167246B (en) * | 2018-01-18 | 2024-04-30 | 福建新源重工有限公司 | Hydraulic oil way of frame |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102561446B (en) | 2015-01-07 |
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Effective date of registration: 20180625 Address after: No. 1, Dongfeng Road, Zhu Hui District, Hengyang, Hunan Patentee after: China Steel Group Hengyang Machinery Co., Ltd. Address before: No. 1, Dongfeng Road, Zhu Hui District, Hengyang, Hunan Patentee before: Sinosteel Hengyang Machinery Co., Ltd. |
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