CN201679783U - Pilot oil supply system of loader - Google Patents

Pilot oil supply system of loader Download PDF

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Publication number
CN201679783U
CN201679783U CN2010201146811U CN201020114681U CN201679783U CN 201679783 U CN201679783 U CN 201679783U CN 2010201146811 U CN2010201146811 U CN 2010201146811U CN 201020114681 U CN201020114681 U CN 201020114681U CN 201679783 U CN201679783 U CN 201679783U
Authority
CN
China
Prior art keywords
valve
oil
guide
pilot
way valve
Prior art date
Application number
CN2010201146811U
Other languages
Chinese (zh)
Inventor
徐新跃
朱艳平
任大明
胡重贺
Original Assignee
徐工集团工程机械股份有限公司科技分公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Application filed by 徐工集团工程机械股份有限公司科技分公司 filed Critical 徐工集团工程机械股份有限公司科技分公司
Priority to CN2010201146811U priority Critical patent/CN201679783U/en
Application granted granted Critical
Publication of CN201679783U publication Critical patent/CN201679783U/en

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Abstract

A pilot oil supply system of a loader comprises a hydraulic oil tank, a working pump, a steering pump, a pilot oil supply module, a pilot maneuvering valve, a hydraulic control multi-way valve, a movable arm oil cylinder and a damp oil cylinder, wherein the pilot oil supply module is formed by inserting a shuttle valve, a pressure reducing valve, a one-way valve and a safety valve; an energy accumulator is connected with the pilot oil supply module; one oil circuit of the working pump and that of the steering pump are connected with the pilot oil supply module, pressure oil enters the pilot maneuvering valve by opening the opening the one-way valve after passing through the shuttle valve and the pressure reducing valve in the pilot oil supply module; when the pressure of the oil achieves the set value of the safety valve, the safety valve is opened to perform the safety protection function; when a driver pushes a control lever and opens the maneuvering valve, the pressure oil pushes the hydraulic control multi-way valve to act, to further maneuver the loader to work; when an engine extinguishes, and the movable arm oil cylinder and is lifted, the energy accumulator provides pilot oil to push the hydraulic control multi-way valve to act, so as to put down the movable arm.

Description

Loader guide oil supply system
Technical field
The utility model relates to a kind of loader guide oil supply system.
Background technique
At present, domestic loader hydraulic system comprises work, steering system, two oil pump feeds of general employing, a steering pump, a working pump, the required fluid of loader with hydraulic pilot manipulation is provided by an independent pioneer pump basically, and pioneer pump and working pump or steering pump are formed a pumps in series, and by same axle driving, the driver promotes operating handle and opens control valve like this, and the fluid that comes from pioneer pump promotes the multi-way valve spool through control valve, and then handles loader work, but present pumps in series structure, reliability is relatively poor, and weight is heavier, the price height, maintenance cost is higher, is unfavorable for installation and maintenance.
Summary of the invention
In order better to solve the problem that hydraulic pilot is handled loader hydraulic system guide fuel feeding, the invention provides a kind of model utility loader guide oil supply system, this system adopts guide's fuel feeding piece and accumulator, guide's fuel feeding piece is by shuttle valve, reduction valve, one-way valve, the safety valve plug-in mounting is formed, accumulator is connected with guide's fuel feeding piece, from working pump, steering pump is respectively got an oil circuit and is entered guide's fuel feeding piece, through shuttle valve relatively, reduction valve decompression throttling, backing down one-way valve provides stable for the pilot control valve, the guide oil of small flow, accumulator is connected on guide's fuel feeding piece, play voltage stabilizing, hold the fluid effect, when the engine misses boom cylinder was in the lifting state, accumulator provided the guide fluid, promote the action of hydraulic control multi-way valve, swing arm is put down.
The technological scheme that its technical problem that solves the utility model adopts is: this system comprises hydraulic oil container; working pump; steering pump; guide's fuel feeding piece; the pilot control valve; the hydraulic control multi-way valve; boom cylinder; dump ram; guide's fuel feeding piece is by shuttle valve; reduction valve; one-way valve; the safety valve plug-in mounting is formed; accumulator is connected with guide's fuel feeding piece; working pump; steering pump is respectively got an oil circuit and is connected to guide's fuel feeding piece; pressure oil is through shuttle valve in guide's fuel feeding piece; reduction valve; back down one-way valve to the pilot control valve; when oil liquid pressure reaches the safety valve setting value; safety valve has been opened the safety protection effect; when the driver promotes operating handle and opens control valve; pressure oil promotes the action of hydraulic control multi-way valve; and then manipulation loader work; when the engine misses boom cylinder is in the lifting state; accumulator provides the guide fluid; promote the action of hydraulic control multi-way valve, swing arm is put down, the reduction valve setting pressure is 35Bar in this system; flow 10L/min, safety valve setting pressure 45Bar.
The beneficial effects of the utility model are: 1) adopted this guide's oil supply system, provide the guide oil sources with working pump or steering pump, saved pioneer pump, avoided the unreliability of string pump, provided cost savings simultaneously.2) owing to adopt accumulator and accumulator voltage stabilizing to be arranged, hold the fluid effect, the guide is controlled steadily, can utilize the fluid of accumulator that the swing arm that engine misses lift is put down simultaneously.3) each element connection aspect is subjected to the restriction in space little, arranges easily.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Accompanying drawing is the utility model loader guide oil supply system connection diagram
In the accompanying drawing: 1. hydraulic oil container 2. filter cleaners 3. working pumps 4. steering pumps 5. steering components 6. guide's fuel feeding pieces 7. safety valves 8. accumulators 9. shuttle valves 10. reduction valve 11. one-way valves 12. pilot control valves 13. boom cylinders 14. hydraulic control multi-way valve 15. dump rams
Embodiment
In the accompanying drawings: guide's fuel feeding piece (6) is by shuttle valve (9); reduction valve (10); one-way valve (11); safety valve (7) plug-in mounting is formed; accumulator (8) is connected with guide's fuel feeding piece (6); working pump (3); steering pump (4) is respectively got an oil circuit and is connected to guide's fuel feeding piece (6); pressure oil is through shuttle valve (9) in guide's fuel feeding piece (6); reduction valve (10); back down one-way valve (11) to pilot control valve (12); when oil liquid pressure reaches safety valve (7) setting value; safety valve (7) has been opened the safety protection effect; when the driver promotes operating handle and opens pilot control valve (12); pressure oil promotes hydraulic control multi-way valve (14) action; and then manipulation loader work; when engine misses boom cylinder (13) is in the lifting state; accumulator (8) provides the guide fluid; promote hydraulic control multi-way valve (14) action, swing arm is put down.

Claims (1)

1. loader guide oil supply system, its technical characteristics is: guide's fuel feeding piece (6) is by shuttle valve (9), reduction valve (10), one-way valve (11), safety valve (7) plug-in mounting is formed, accumulator (8) is connected with guide's fuel feeding piece (6), working pump (3), steering pump (4) is respectively got an oil circuit and is connected to guide's fuel feeding piece (6), pressure oil is through shuttle valve (9) in guide's fuel feeding piece (6), reduction valve (10), back down one-way valve (11) and receive pilot control valve (12), when the driver promotes operating handle and opens pilot control valve (12), pressure oil promotes hydraulic control multi-way valve (14) action, and then manipulation loader work, when engine misses boom cylinder (13) is in the lifting state, accumulator (8) provides the guide fluid, promote hydraulic control multi-way valve (14) action, swing arm is put down.
CN2010201146811U 2010-01-26 2010-01-26 Pilot oil supply system of loader CN201679783U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2010201146811U CN201679783U (en) 2010-01-26 2010-01-26 Pilot oil supply system of loader

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2010201146811U CN201679783U (en) 2010-01-26 2010-01-26 Pilot oil supply system of loader

Publications (1)

Publication Number Publication Date
CN201679783U true CN201679783U (en) 2010-12-22

Family

ID=43344827

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2010201146811U CN201679783U (en) 2010-01-26 2010-01-26 Pilot oil supply system of loader

Country Status (1)

Country Link
CN (1) CN201679783U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320520A (en) * 2011-08-18 2012-01-18 南通润邦重机有限公司 Wind power installation crane hydraulic control circuit
CN103362899A (en) * 2012-04-10 2013-10-23 斗山工程机械(山东)有限公司 Pilot, heat dissipation and integration hydraulic system and loading machine
CN105525641A (en) * 2016-01-25 2016-04-27 徐州徐工特种工程机械有限公司 Movable arm dropping hydraulic system used for skid steer loader in case of flameout

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102320520A (en) * 2011-08-18 2012-01-18 南通润邦重机有限公司 Wind power installation crane hydraulic control circuit
CN102320520B (en) * 2011-08-18 2013-05-22 南通润邦重机有限公司 Wind power installation crane hydraulic control circuit
CN103362899A (en) * 2012-04-10 2013-10-23 斗山工程机械(山东)有限公司 Pilot, heat dissipation and integration hydraulic system and loading machine
CN103362899B (en) * 2012-04-10 2016-10-19 斗山工程机械(山东)有限公司 Guide, heat radiation integrated hydraulic system and loader
CN105525641A (en) * 2016-01-25 2016-04-27 徐州徐工特种工程机械有限公司 Movable arm dropping hydraulic system used for skid steer loader in case of flameout

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GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20101222

Termination date: 20170126

CF01 Termination of patent right due to non-payment of annual fee