CN2931433Y - Enclosed up-down hydraulic system - Google Patents
Enclosed up-down hydraulic system Download PDFInfo
- Publication number
- CN2931433Y CN2931433Y CNU2006200427046U CN200620042704U CN2931433Y CN 2931433 Y CN2931433 Y CN 2931433Y CN U2006200427046 U CNU2006200427046 U CN U2006200427046U CN 200620042704 U CN200620042704 U CN 200620042704U CN 2931433 Y CN2931433 Y CN 2931433Y
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- Prior art keywords
- variable displacement
- motor
- pressure
- way
- double
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Abstract
A closed elevating hydraulic system comprises a hyperbaric chamber formed by a two-way variable pump and a motor's hyperbaric opening, a lower pressure chamber formed by a two-way variable pump and a motor's lower pressure opening, a closed loop formed by the hyperbaric chamber and the lower pressure chamber, and a sensor connected on the motor's hyperbaric opening. Wherein the two-way variable pump and the motor are connected with a recharging oil system, a high position drainage port of the two-way variable pump and the motor is connected with cooling hydraulic liquid, a low position drainage port of the two-way variable pump and the motor is connected with a oil box and a two-bit four-inlet valve connected with a motor brake at one side of the two-way variable pump. When the two-bit four-inlet valve is off working state, the motor brake is connected with a return opening, the inlet is closed and the motor brake closes; when the two-bit four-inlet valve is in working state, the motor brake is connected with the inlet, the return opening is closed and the motor brake opens. The utility model solves the common problems of losing speed of the motor and emergency braking in common elevating system.
Description
Technical field
The utility model relates to a kind of hydraulic efficiency pressure system, particularly relates to a kind of enclosed lifting hydraulic efficiency pressure system.Be a kind of reliably, hydraulic lifting system efficiently.Can be widely used in the large-tonnage weight-lifting equipment.
Background technology
The jacking system of existing middle or small tonnage weight-lifting equipment adopts open-circuit system more.But in the design of hoister in large tonnage, because requirement to pressure, flow, if still just in the past little tonnage hoisting crane open-circuit system is simply amplified, problem such as then low, the structure relative complex of its efficient, the fuel tank capacity that needs be big, just seeming is difficult to go beyond.Therefore the failure-free system that needs design one cover to distinguish in the past in essence solves the problems referred to above.
Summary of the invention
The purpose of this utility model is to provide a cover transmission efficiency height, simple in structure, safe and reliable lifting hydraulic efficiency pressure system for the large-tonnage weight-lifting equipment.
The utility model to achieve the above object, a kind of enclosed lifting hydraulic efficiency pressure system is provided, it comprises, the two way variable displacement pump that has high-pressure mouth, low pressure port, a high position and low level housing drain tap, the double-action variable displacement motor that has high-pressure mouth, low pressure port, a high position and low level drain tap and motor brake, the high pressure chest that the high-pressure mouth of two way variable displacement pump links to each other with the high-pressure mouth of double-action variable displacement motor and constitutes, the low-pressure cavity that the low pressure port of two way variable displacement pump links to each other with the low pressure port of double-action variable displacement motor and constitutes, the closed circuit that constitutes by high pressure chest and low-pressure cavity.The outgate that is connected to the two way variable displacement pump high-pressure mouth is received the by pass valve of fuel tank, be connected to two check valves of two way variable displacement pump and double-action variable displacement motor low pressure port respectively, the low pressure port of two way variable displacement pump and double-action variable displacement motor connects the interface of oil-supplementing system respectively by two check valves, be connected to the sensor on the double-action variable displacement motor low pressure port, be connected to double-action variable displacement motor low pressure port one side by drawing on the way in the oil-supplementing system pipeline, and the two-position four-way valve that links to each other with motor brake; Be connected to the return opening of two-position four-way valve and the oil return line check valve between the fuel tank, be connected to the interface that connects Fu cooling hydraulic oil on the high-order housing drain tap of two way variable displacement pump and double-action variable displacement motor, the low level housing drain tap of two way variable displacement pump and double-action variable displacement motor directly inserts fuel tank.
Aforesaid structure is according to designing requirement, at first defined two way variable displacement pump, high-pressure mouth, the low pressure port of (hereinafter to be referred as pump) and double-action variable displacement motor (hereinafter to be referred as motor), the high-pressure mouth of pump linked to each other with the high-pressure mouth of motor constitute high pressure chest, the low pressure port of pump links to each other with the low pressure port of motor and constitutes low-pressure cavity, and high pressure chest and low-pressure cavity constitute closed circuit.The housing drain tap that will be in a pump housing high position installs flow regulating valve additional makes rinse mouth, inserts the cooling hydraulic oil of Fu; The housing drain tap that will be in pump housing low level directly takes back fuel tank.Motor in like manner connects.High-pressure mouth at pump inserts a by pass valve, and outgate takes back fuel tank.Oil-supplementing system is inserted the low pressure port of motor and pump respectively by check valve.In the oil-supplementing system pipeline by motor low pressure port one side, draw one the road and be connected in two-position four-way valve (as oil inlet), the return opening of two-position four-way valve returns fuel tank after connecing check valve.When two-position four-way valve is in off working state, motor brake is communicated with return opening, oil inlet sealing, motor brake closure; Electric when in running order, the oil inlet of two-position four-way valve is communicated with motor brake, return opening seals, motor brake unclamps.
The utility model has following beneficial effect:
1. because hydraulic efficiency pressure system of the present utility model is the closed circuit that is made of high pressure chest and low-pressure cavity, be called closed system.Elements such as balance cock used in the open-circuit system have been removed in the closed system from.So the used Hydraulic Elements of hydraulic efficiency pressure system of the present utility model are fewer, and are relatively simple for structure, the fuel tank volume of required configuration also can significantly reduce.
2. because hydraulic efficiency pressure system of the present utility model is a closed circuit, so transmission efficiency is than higher, and loss in efficiency is also smaller.
3. because of the aforesaid structure of hydraulic efficiency pressure system of the present utility model, the low pressure port of pump and motor inserts oil-supplementing systems by two check valves respectively, and the high-order housing drain tap of pump and motor inserts the cooling hydraulic oil of Fu.So hydraulic efficiency pressure system of the present utility model has solved system cools effectively, common problem in the general lifting hydraulic efficiency pressure system such as sky and emergency braking is inhaled in motor stall, uses safety and reliability.
4. because the two way variable displacement pump high-pressure mouth in the hydraulic efficiency pressure system of the present utility model is connected to by pass valve, the outgate of by pass valve is received in the fuel tank, by pass valve is being controlled the oil pressure in the high pressure chest, and oil pressure exceeds when setting, and flow back in the fuel tank by by pass valve at the oil that overflows on the high-pressure mouth; The low level housing drain tap of pump and motor directly inserts fuel tank, and this also flow back in the fuel tank oil that is leaked by low level housing drain tap.So hydraulic efficiency pressure system of the present utility model can be saved oil mass, enhances productivity.
Description of drawings
Fig. 1 is the structural representation of the utility model enclosed lifting hydraulic efficiency pressure system.
Identifier declaration among the figure:
1, two way variable displacement pump 2, by pass valve 3, double-action variable displacement motor 4, fuel tank 5, check valve 6, two-position four-way valve 7, drg 8, the interface 9 that connects the cooling hydraulic oil of Fu, the interface 10 that connects oil-supplementing system, sensor 11, high pressure chest 12, low-pressure cavity 13, oil return line check valve
The specific embodiment
Below in conjunction with accompanying drawing structure of the present utility model is further described.
As shown in Figure 1: hydraulic efficiency pressure system of the present utility model comprises: have high-pressure mouth 102, low pressure port 104, the two way variable displacement pump 1 of high-order housing drain tap 101 and low level housing drain tap 103, have high-pressure mouth 302, low pressure port 304, a high position and low level drain tap 301,303 and the double-action variable displacement motor 3 of motor brake 7, the high pressure chest 11 that the high-pressure mouth 102 of two way variable displacement pump 1 links to each other with the high-pressure mouth 302 of double-action variable displacement motor 3 and constitutes, the low-pressure cavity 12 that the low pressure port 104 of two way variable displacement pump 1 links to each other with the low pressure port 304 of double-action variable displacement motor 3 and constitutes, the closed circuit that constitutes by high pressure chest 11 and low-pressure cavity 12, the outgate that is connected to two way variable displacement pump 1 high-pressure mouth 102 is received the by pass valve 2 of the control system pressure of fuel tank 4, be connected to two check valves 5 of two way variable displacement pump 1 and motor 3 low pressure ports 104 and 304 respectively, two way variable displacement pump 1 and motor 3 low pressure ports 104 and 304 connect the interface 9 of oil-supplementing system respectively by two check valves 5, be connected to double-action variable displacement motor 3 low pressure ports 304 1 sides by draw in the oil-supplementing system pipeline on the way and two four of linking to each other with motor brake 7 advance valve 6 (as oil inlet 601), be connected to two the four oil return line check valves 13 that advance between valve 6 return openings 602 and the fuel tank 4; Be connected to the interface 8 that connects Fu cooling hydraulic oil on the high-order housing drain tap 101,301 of two way variable displacement pump 1 and double-action variable displacement motor 3; The low level housing drain tap 103,302 of two way variable displacement pump 1 and motor 3 inserts fuel tank 4.
When hydraulic efficiency pressure system of the present utility model promotes work, because the existence of load, motor 3 initial not rotations, pump 1 is in the high pressure chest 11 in the pipeline that connects pump 1 and motor 3 high-pressure mouths 102,302, set up pressure gradually, until being enough to overcome the torque that load produces, drive motor 3 rotations, realize enhanced feature.Its system's cut-off pressure can be limited by by pass valve 2 according to design.The motor oil return directly flows to the low pressure port of pump 1 through low-pressure cavity 12, enters next circulation.At interface 9 cut-in pressure oil, concrete force value is set according to elevator system pressure.The check valve 5 of flowing through under the normal working can be pump, motor replenishes the loss of oil volume that internal leakage causes; Meeting accident when making low-pressure cavity 12 underfeds, repairing avoids motor to inhale the empty load tenesmus that causes rapidly.Motor brake 7 is in running order during normal lifting, but when sensor 10 detects low-pressure cavity pressure and is low to moderate a certain setting numerical value, will control two-position four-way valve 6 and make the motor brake closure, plays the effect of safety guard-safeguard.
Claims (1)
1. enclosed lifting hydraulic efficiency pressure system, it is characterized in that comprising, have high-pressure mouth, low pressure port, the two way variable displacement pump of a high position and low level housing drain tap, have high-pressure mouth, low pressure port, the double-action variable displacement motor of a high position and low level drain tap and motor brake, the high pressure chest that the high-pressure mouth of two way variable displacement pump links to each other with the high-pressure mouth of double-action variable displacement motor and constitutes, the low-pressure cavity that the low pressure port of two way variable displacement pump links to each other with the low pressure port of double-action variable displacement motor and constitutes, the closed circuit that constitutes by high pressure chest and low-pressure cavity, the outgate that is connected to the two way variable displacement pump high-pressure mouth is received the by pass valve of fuel tank, be connected to two check valves of two way variable displacement pump and double-action variable displacement motor low pressure port respectively, the low pressure port of two way variable displacement pump and double-action variable displacement motor connects the interface of oil-supplementing system respectively by two check valves, be connected to the sensor on the double-action variable displacement motor low pressure port, be connected to double-action variable displacement motor low pressure port one side by drawing on the way in the oil-supplementing system pipeline, and the two-position four-way valve that links to each other with motor brake, be connected to the oil return line check valve between two-position four-way valve return opening and the fuel tank, be connected to the interface that connects Fu cooling hydraulic oil on the high-order housing drain tap of two way variable displacement pump and double-action variable displacement motor, the low level housing draining of two way variable displacement pump and double-action variable displacement motor directly inserts fuel tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200427046U CN2931433Y (en) | 2006-06-12 | 2006-06-12 | Enclosed up-down hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200427046U CN2931433Y (en) | 2006-06-12 | 2006-06-12 | Enclosed up-down hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2931433Y true CN2931433Y (en) | 2007-08-08 |
Family
ID=38347934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200427046U Expired - Fee Related CN2931433Y (en) | 2006-06-12 | 2006-06-12 | Enclosed up-down hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2931433Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011127807A1 (en) * | 2010-04-13 | 2011-10-20 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system and method |
| CN101844726B (en) * | 2009-03-25 | 2012-09-19 | 宁波市凹凸重工有限公司 | Hydraulic oil passage device for safety of gantry crane |
| WO2013000321A1 (en) * | 2011-06-29 | 2013-01-03 | 湖南三一智能控制设备有限公司 | Closed rotary hydraulic system for crane and crane |
| CN103362897A (en) * | 2013-06-25 | 2013-10-23 | 三一重机有限公司 | Early warning protection device of travel motor as well as travel motor and travel machinery |
| CN103523686A (en) * | 2013-11-01 | 2014-01-22 | 太原重工股份有限公司 | Large traveling crane |
| CN103742474A (en) * | 2014-01-07 | 2014-04-23 | 中联重科股份有限公司 | Tower crane, tower crane hoist system and hydraulic station |
| CN115030931A (en) * | 2022-06-29 | 2022-09-09 | 三一石油智能装备有限公司 | Closed hydraulic system, fracturing truck and closed hydraulic system control method |
-
2006
- 2006-06-12 CN CNU2006200427046U patent/CN2931433Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101844726B (en) * | 2009-03-25 | 2012-09-19 | 宁波市凹凸重工有限公司 | Hydraulic oil passage device for safety of gantry crane |
| WO2011127807A1 (en) * | 2010-04-13 | 2011-10-20 | 长沙中联重工科技发展股份有限公司 | Hydraulic control system and method |
| WO2013000321A1 (en) * | 2011-06-29 | 2013-01-03 | 湖南三一智能控制设备有限公司 | Closed rotary hydraulic system for crane and crane |
| CN103362897A (en) * | 2013-06-25 | 2013-10-23 | 三一重机有限公司 | Early warning protection device of travel motor as well as travel motor and travel machinery |
| CN103523686A (en) * | 2013-11-01 | 2014-01-22 | 太原重工股份有限公司 | Large traveling crane |
| CN103523686B (en) * | 2013-11-01 | 2015-05-20 | 太原重工股份有限公司 | Large traveling crane |
| CN103742474A (en) * | 2014-01-07 | 2014-04-23 | 中联重科股份有限公司 | Tower crane, tower crane hoist system and hydraulic station |
| CN115030931A (en) * | 2022-06-29 | 2022-09-09 | 三一石油智能装备有限公司 | Closed hydraulic system, fracturing truck and closed hydraulic system control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070808 Termination date: 20150612 |
|
| EXPY | Termination of patent right or utility model |