CN201858218U - Oil return device for engineering machinery - Google Patents
Oil return device for engineering machinery Download PDFInfo
- Publication number
- CN201858218U CN201858218U CN2010205584656U CN201020558465U CN201858218U CN 201858218 U CN201858218 U CN 201858218U CN 2010205584656 U CN2010205584656 U CN 2010205584656U CN 201020558465 U CN201020558465 U CN 201020558465U CN 201858218 U CN201858218 U CN 201858218U
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- back pressure
- oil
- pressure valve
- valve
- control valve
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Abstract
The utility model discloses an oil return device for engineering machinery, which comprises a power source, wherein the power source is connected with an oil supply pump and a control oil pump, an output port of the oil supply pump is connected with a main control valve, an oil return hole of the main control valve is respectively connected with a first back pressure valve and a second back pressure valve, an output port of the first back pressure valve is connected with a hydraulic oil tank by a radiator, and an output port of the second back pressure valve is connected with the hydraulic oil tank. The oil return device is characterized by further comprising an electromagnetic directional valve, wherein an input port of the electromagnetic directional valve is connected with the control oil pump, an output port of the electromagnetic directional valve is respectively connected with pilot oil holes of the first back pressure valve and the second back pressure valve, and a control end of the electromagnetic directional valve is connected with a temperature control module. The oil return device is provided with the electromagnetic directional valve, and the electromagnetic directional valve is controlled to be turned on and off by the temperature control module, so that the first back pressure valve and the second back pressure valve are controlled to be turned on and off, and a proper oil return way can be automatically selected by the hydraulic oil according to the oil temperature.
Description
Technical field
The utility model relates to a kind of oil return apparatus of hydraulic system, is specifically related to a kind of oil return apparatus that is used for engineering machinery.
Background technique
At present, along with the continuous development of science and technology, in engineering fields such as building, water conservancies, all kinds of construction planies begin to be used widely, and such as excavator, hoist, bulldozer or the like, the construction plant that this class is used for engineering construction is referred to as engineering machinery.The engineering machinery of using mainly is made up of traveling gear, swivel gear, operator cabin, equipment, control gear and hydraulic control system now, swivel gear and traveling gear are the bodies of engineering machinery, equipment is transferred on swivel gear, swivel gear is fixed on the underframe of traveling gear, wherein hydraulic control system is the important component part of excavator, for the exercises of engineering machinery provide hydraulic power.
In the hydraulic control system of engineering machinery, inevitably need use oil return apparatus, the oil return apparatus that generally uses comprises a power source now, be connected with oil feed pump and control the duplex pump that oil pump constitutes with power source, described fuel feeding delivery side of pump is connected with main control valve, described main control valve transfers to hydraulic oil in the hydraulic jack, for the engineering machinery action provides power, the return opening of main control valve is connected with first and second back pressure valve respectively, the delivery outlet of two back pressure valves is connected with hydraulic oil container respectively, wherein also is connected with radiator between first back pressure valve and the hydraulic oil container.This scavenger valve device in use, the pressure of two back pressure valves preestablishes, when the process main control valve is from the back pressure valve oil return after hydraulic oil uses, hydraulic oil is at first got back to fuel tank through the oil hydraulic circuit that is provided with radiator, hydraulic oil oil temperature drop is low, and when the pressure of oil hydraulic circuit reached the second back pressure valve cracking pressure, a part of hydraulic oil was directly got back to hydraulic oil container through second back pressure valve, need not heat radiation, thereby guaranteed the balance of the operating temperature of whole hydraulic oil.Though yet this oil return apparatus has to a certain degree guaranteed the balance of hydraulic working oil temperature, but the pressure of back pressure valve preestablishes in this device, and can only open and close according to hydraulic fluid pressure size in the oil hydraulic circuit, can't follow variation of temperature and variation in time, thereby accurate inadequately for the control of hydraulic oil temperature, cause hydraulic oil to select only way to cycle oil automatically according to the oil temperature.
Summary of the invention
The utility model purpose provides a kind of oil return apparatus that is used for engineering machinery, by the improvement to structure, makes the hydraulic oil oil return to select suitable way to cycle oil automatically according to the oil temperature.
For achieving the above object, the technical solution adopted in the utility model is: a kind of oil return apparatus that is used for engineering machinery, comprise a power source, be connected with oil feed pump and control oil pump with described power source, the delivery outlet of described oil feed pump is connected with main control valve, the return opening of described main control valve is connected with first back pressure valve and second back pressure valve respectively, the delivery outlet of described first back pressure valve is connected with hydraulic oil container through radiator, the delivery outlet of described second back pressure valve is connected with hydraulic oil container, also comprise a solenoid directional control valve, the inlet opening of described solenoid directional control valve is connected with described control oil pump, the delivery outlet of described solenoid directional control valve is connected with guide's hydraulic fluid port of first back pressure valve and second back pressure valve respectively, and the control end of described solenoid directional control valve is connected with temperature control module.
In the technique scheme, described engineering machinery is generally to use at present, mainly by traveling gear, swivel gear, operator cabin, equipment, control gear and hydraulic control system are formed, its power source is a motor, be connected with oil feed pump and control the duplex pump that oil pump is connected and constituted with power source, oil feed pump is connected with main control valve, the return opening of main control valve is connected with hydraulic oil container through first back pressure valve and second back pressure valve respectively, wherein also be provided with a radiator between first back pressure valve and the hydraulic oil container, guide's hydraulic fluid port of first and second back pressure valve all is connected with solenoid directional control valve, and solenoid directional control valve is controlled by temperature control module.This oil return apparatus in use, the power source outputting power drives oil feed pump and the work of control oil pump, hydraulic oil flow is gone into main control valve, temperature control module is monitored and is controlled solenoid directional control valve and opens and closes to hydraulic oil temperature, when the oil temperature was too high, temperature control module control solenoid directional control valve output guide oil to the second back pressure valve increased the second back pressure valve cracking pressure, mainly by first back pressure valve and radiator flow back to hydraulic oil container from the hydraulic oil that main control valve flows out this moment, makes that oily temperature drop is low; Cross when low when oil temperature, temperature control module control solenoid directional control valve output guide oil to the first back pressure valve increases the first back pressure valve cracking pressure, and this moment, hydraulic oil mainly directly flowed back to hydraulic oil container from second back pressure valve, makes oily temperature rise.
Further technological scheme, described temperature control module comprises the temperature transducer that is connected with hydraulic oil container, and described temperature transducer output terminal is connected with controller, and the output terminal of described controller is connected with the control end of described solenoid directional control valve.Described temperature transducer is used to detect hydraulic fluid temperature, and the temperature information of gathering is passed to controller, and the controller received signal is also handled, thereby the signal of handling is passed to the keying of solenoid directional control valve control solenoid directional control valve.
Further technological scheme, described back pressure valve is controlled back pressure valve.
Because the technique scheme utilization, the advantage that the utility model compared with prior art has is:
1, because the utility model passes through to insert a solenoid directional control valve, the delivery outlet of solenoid directional control valve is connected with guide's hydraulic fluid port of first back pressure valve and second back pressure valve respectively, the control end of solenoid directional control valve is connected with temperature control module, utilize temperature control module to detect hydraulic oil temperature and control the keying of solenoid directional control valve, thereby control the keying of first back pressure valve and second back pressure valve, make hydraulic oil to select suitable way to cycle oil automatically according to the oil temperature;
2, the utility model need not existing oil return apparatus is changed on a large scale, is easy to realize;
3, the utility model is simple in structure, and is easy to use, is fit to promote the use of.
Description of drawings
Fig. 1 is the utility model embodiment one a schematic diagram.
Wherein: 1, power source; 2, oil feed pump; 3, control oil pump; 4, main control valve; 5, first back pressure valve; 6, second back pressure valve; 7, radiator; 8, hydraulic oil container; 9, solenoid directional control valve; 10, temperature transducer; 11, controller.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment one: referring to shown in Figure 1, a kind of oil return apparatus that is used for engineering machinery, comprise a power source 1, be connected with oil feed pump 2 and control oil pump 3 with described power source, the delivery outlet of described oil feed pump is connected with main control valve 4, the return opening of described main control valve is connected with first back pressure valve 5 and second back pressure valve 6 respectively, the delivery outlet of described first back pressure valve is connected with hydraulic oil container 8 through radiator 7, the delivery outlet of described second back pressure valve 6 is connected with hydraulic oil container 8, also comprise a solenoid directional control valve 9, the inlet opening of described solenoid directional control valve is connected with described control oil pump 3, the delivery outlet of described solenoid directional control valve 9 is connected with guide's hydraulic fluid port of first back pressure valve 5 and second back pressure valve 6 respectively, the control end of described solenoid directional control valve 9 is connected with controller 11, described controller input end is connected with temperature transducer 10, and described temperature transducer is connected with hydraulic oil container 8.
This oil return apparatus is gathered hydraulic fluid temperature information by temperature transducer in use, passes to controller, after handling via controller, outputs signal to solenoid directional control valve:
(1) to detect oil warm when too high when temperature transducer, controller output electrical signal is to electromagnetic switch, solenoid directional control valve gets electric opening with the delivery outlet that the second back pressure valve guide hydraulic fluid port is connected, guide oil enters second back pressure valve, compress the spring in second back pressure valve, increased the second back pressure valve cracking pressure, the hydraulic oil oil return in the hydraulic circuit is mainly by first back pressure valve at this moment, the radiator of flowing through returns hydraulic oil container, thereby makes hydraulic fluid temperature reduce;
(2) when detecting oil temperature, crosses when low by temperature transducer, controller carries electrical signal to solenoid directional control valve, solenoid directional control valve gets electric opening with the delivery outlet that the first back pressure valve guide hydraulic fluid port is connected, guide oil enters first back pressure valve, pressure spring has increased the cracking pressure of first back pressure valve, and this moment, the oil hydraulic circuit oil return was mainly returned hydraulic oil container by second back pressure valve, without radiator, thereby make hydraulic fluid temperature raise;
(3) when detecting oily temperature, temperature transducer do not have when unusual, controller does not carry electrical signal to solenoid directional control valve, solenoid directional control valve is in the meta state, an oil hydraulic circuit oil return part is by first back pressure valve, the radiator of flowing through returns hydraulic oil container, and a part directly flows back to hydraulic oil container by second back pressure valve.
Claims (3)
1. oil return apparatus that is used for engineering machinery, comprise a power source (1), be connected with oil feed pump (2) and control oil pump (3) with described power source (1), the delivery outlet of described oil feed pump (2) is connected with main control valve (4), the return opening of described main control valve (4) is connected with first back pressure valve (5) and second back pressure valve (6) respectively, the delivery outlet of described first back pressure valve (5) is connected with hydraulic oil container (8) through radiator (7), the delivery outlet of described second back pressure valve (6) is connected with hydraulic oil container (8), it is characterized in that: also comprise a solenoid directional control valve (9), the inlet opening of described solenoid directional control valve is connected with described control oil pump (3), the delivery outlet of described solenoid directional control valve (9) is connected with guide's hydraulic fluid port of first back pressure valve (5) and second back pressure valve (6) respectively, and the control end of described solenoid directional control valve (9) is connected with temperature control module.
2. a kind of oil return apparatus that is used for engineering machinery according to claim 1, it is characterized in that: described temperature control module comprises the temperature transducer (10) that is connected with hydraulic oil container (8), described temperature transducer (10) output terminal is connected with controller (11), and the output terminal of described controller (11) is connected with the control end of described solenoid directional control valve (9).
3. a kind of oil return apparatus that is used for engineering machinery according to claim 1 is characterized in that: described back pressure valve is controlled back pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205584656U CN201858218U (en) | 2010-10-13 | 2010-10-13 | Oil return device for engineering machinery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205584656U CN201858218U (en) | 2010-10-13 | 2010-10-13 | Oil return device for engineering machinery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201858218U true CN201858218U (en) | 2011-06-08 |
Family
ID=44104025
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205584656U Expired - Fee Related CN201858218U (en) | 2010-10-13 | 2010-10-13 | Oil return device for engineering machinery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201858218U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758585A (en) * | 2012-07-26 | 2012-10-31 | 徐州徐工铁路装备有限公司 | Idle-preventing system of hydraulic drill jumbo |
| CN102927437A (en) * | 2012-11-28 | 2013-02-13 | 盛泽能源技术有限公司 | Efficient and energy-saving type large-discharge double-line hydraulic gas substation system |
| CN103470574A (en) * | 2013-08-30 | 2013-12-25 | 三一重机有限公司 | Hydraulic oil-return device, hydraulic system and excavator |
| CN103527564A (en) * | 2013-11-05 | 2014-01-22 | 中国航空工业集团公司西安飞机设计研究所 | Method for adjusting return oil pressure of hydraulic pump shell |
| CN103557205A (en) * | 2013-09-23 | 2014-02-05 | 山东临工工程机械有限公司 | Hydraulic radiating system |
| CN112268038A (en) * | 2020-10-19 | 2021-01-26 | 江苏徐工工程机械研究院有限公司 | Novel hydraulic oil cooling system |
| CN112681445A (en) * | 2020-12-15 | 2021-04-20 | 中联重科土方机械有限公司 | Oil return control system and excavator |
-
2010
- 2010-10-13 CN CN2010205584656U patent/CN201858218U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102758585A (en) * | 2012-07-26 | 2012-10-31 | 徐州徐工铁路装备有限公司 | Idle-preventing system of hydraulic drill jumbo |
| CN102758585B (en) * | 2012-07-26 | 2015-03-11 | 徐州徐工铁路装备有限公司 | Idle-preventing system of hydraulic drill jumbo |
| CN102927437A (en) * | 2012-11-28 | 2013-02-13 | 盛泽能源技术有限公司 | Efficient and energy-saving type large-discharge double-line hydraulic gas substation system |
| CN103470574A (en) * | 2013-08-30 | 2013-12-25 | 三一重机有限公司 | Hydraulic oil-return device, hydraulic system and excavator |
| CN103557205A (en) * | 2013-09-23 | 2014-02-05 | 山东临工工程机械有限公司 | Hydraulic radiating system |
| CN103527564A (en) * | 2013-11-05 | 2014-01-22 | 中国航空工业集团公司西安飞机设计研究所 | Method for adjusting return oil pressure of hydraulic pump shell |
| CN103527564B (en) * | 2013-11-05 | 2015-10-28 | 中国航空工业集团公司西安飞机设计研究所 | A kind of adjusting method of return oil pressure of hydraulic pump shell |
| CN112268038A (en) * | 2020-10-19 | 2021-01-26 | 江苏徐工工程机械研究院有限公司 | Novel hydraulic oil cooling system |
| CN112681445A (en) * | 2020-12-15 | 2021-04-20 | 中联重科土方机械有限公司 | Oil return control system and excavator |
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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: 20110608 Termination date: 20141013 |
|
| EXPY | Termination of patent right or utility model |