CN202416433U - Bucket rod speed reduction energy-saving system in hydraulic control positive flow system of excavator - Google Patents
Bucket rod speed reduction energy-saving system in hydraulic control positive flow system of excavator Download PDFInfo
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- CN202416433U CN202416433U CN201220049703XU CN201220049703U CN202416433U CN 202416433 U CN202416433 U CN 202416433U CN 201220049703X U CN201220049703X U CN 201220049703XU CN 201220049703 U CN201220049703 U CN 201220049703U CN 202416433 U CN202416433 U CN 202416433U
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- valve group
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Abstract
The utility model discloses a bucket rod speed reduction energy-saving system in a hydraulic control positive flow system of an excavator. The energy-saving system is characterized in that pressure oil flowing out of a first output port and a second output port of a bucket rod pilot valve flows into a throttle input port of a throttle shuttle valve group through a first output port of a control shuttle valve group and flows back to an oil tank through an oil return port; an output port of the throttle shuttle valve group is connected to a control port of a second main pump in a double variable displacement pump; the throttle shuttle valve group controls the pressure of the control port of the second main pump through a hydraulic half bridge throttle mode; output pressure oil of other pilot valves flows into a second input port of the throttle shuttle valve group through a second output port of the control shuttle valve group; and a control port of a first main pump in the double variable displacement pump is directly connected with a third output port of the control shuttle valve group. The energy-saving system is used for reducing the speed of a bucket rod of the exactor to fulfill the aim of saving energy.
Description
Technical field
The utility model relates to the positive flow system of hydraulic control in the excavator, more particularly relates to a kind of excavator boom speed that is used to reduce, to reach the positive flow system of excavator hydraulic control of energy-conservation purpose.
Background technology
The energy-conservation heat radiation of hydraulic system is a technical barrier always in the hydraulic crawler excavator.Along with the increase of excavator tonnage and use power, the hydraulic system heat production also increases thereupon, and great amount of heat causes the oil temperature too high.
When medium-sized excavator adopts positive flow system, generally use the duplex variable pump, by the duplex variable pump supply with respectively main valve about part.From the consideration of aspect of performance, the left and right sides valve block load of dipper action is also inhomogeneous, and the valve block liquid resistance that load is bigger is bigger; Cause heating more; And because of the reason of general power control, the power of another pump is reduced too much, the energy of motor output can not make full use of.Automatically controlled positive flow system can reduce through the automatically controlled pump delivery that makes wherein, with head it off.But the positive flow system head it off of hydraulic control is more complicated then.
Summary of the invention
The utility model is for avoiding above-mentioned existing in prior technology weak point, the dipper reduction of speed energy conserving system in the positive flow system of a kind of excavator hydraulic control is provided, thereby to reach the purpose that the speed that reduces the dipper action cuts down the consumption of energy.
The utility model adopts following technical scheme for the technical solution problem:
The design feature of the dipper reduction of speed energy conserving system in the positive flow system of the utility model excavator hydraulic control is: the pressure oil that is flowed out by first output port of dipper pilot valve and second output port inserts the throttling input port of throttling shuttle valve group through first delivery outlet of control shuttle valve group, and takes back fuel tank through oil return opening; The output port of throttling shuttle valve group inserts the control port of second main pump in the duplex variable pump; Control the control port pressure of said second main pump through the throttle style of hydraulic pressure half-bridge by said throttling shuttle valve group; The pressure oil output of other pilot valve inserts second input port of throttling shuttle valve group through second output port of control shuttle valve group; The control end of first main pump directly is connected with the 3rd output port of control shuttle valve group in the duplex variable pump.
Compared with present technology, the utility model beneficial effect is embodied in:
1, the utility model is through being provided with throttling shuttle valve group between the control end of second main pump of duplex variable pump and dipper pilot valve; The controlled pressure that reduces by second main pump is minimized the speed of dipper action, thereby realizes cutting down the consumption of energy and reduce the goal of the invention of heating.
2, the utility model is simple in structure, is easy to realize that cost is lower.
Description of drawings
Fig. 1 constitutes sketch map for the utility model system;
Label among the figure: 11 dipper pilot valves; 12 control shuttle valve groups; 13 throttling shuttle valve groups; 14 swing arm pilot valves; 15 scraper bowl pilot valves; 16 revolution pilot valves.
The specific embodiment
Referring to Fig. 1, the form of structure of the dipper reduction of speed energy conserving system in the present embodiment in the positive flow system of excavator hydraulic control is:
The pressure oil that is flowed out by the first output port D1 of dipper pilot valve 11 and the second output port D2 inserts the throttling input port A1 of throttling shuttle valve group 13 through the first delivery outlet AB of control shuttle valve group 12, and takes back fuel tank 14 through oil return opening A2; The output port C of throttling shuttle valve group 13 inserts the control port of the second main pump ZB2 in the duplex variable pump; Control the control port pressure of the said second main pump ZB2 by said throttling shuttle valve group 13 through the throttle style of hydraulic pressure half-bridge, make this force value be lower than the initial pressure value of dipper pilot valve output; Other pilot valve; Comprise that the pressure oil output of swing arm pilot valve 14, scraper bowl pilot valve 15 and right lateral traveling pilot valve 16 inserts the second input port B of throttling shuttle valve group 13 through the second output port P21 of control shuttle valve group 12; Make when composite move; Through the throttling shuttle valve group 13 control mouth of back inflow main pump ZB2 relatively, so the speed during composite move does not receive the influence of dipper reduction of speed function to other pilot signal by the delivery outlet P21 of control shuttle valve 12; The control end of the first main pump ZB1 directly is connected with the 3rd output port P11 of control shuttle valve group 12 in the duplex variable pump.
Claims (1)
1. the dipper reduction of speed energy conserving system in the positive flow system of excavator hydraulic control; The pressure oil that it is characterized in that being flowed out by first output port (D1) of dipper pilot valve (11) and second output port (D2) inserts the throttling input port (A1) of throttling shuttle valve group (13) through first delivery outlet (AB) of control shuttle valve group (12), and takes back fuel tank (14) through oil return opening (A2); The output port (C) of throttling shuttle valve group (13) inserts the control port of second main pump (ZB2) in the duplex variable pump; Control the control port pressure of said second main pump (ZB2) through the throttle style of hydraulic pressure half-bridge by said throttling shuttle valve group (13); The pressure oil output of other pilot valve inserts second input port (B) of throttling shuttle valve group (13) through second output port (P21) of control shuttle valve group (12); The control end of first main pump (ZB1) directly is connected with the 3rd output port (P11) of control shuttle valve group (12) in the duplex variable pump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220049703XU CN202416433U (en) | 2012-02-16 | 2012-02-16 | Bucket rod speed reduction energy-saving system in hydraulic control positive flow system of excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220049703XU CN202416433U (en) | 2012-02-16 | 2012-02-16 | Bucket rod speed reduction energy-saving system in hydraulic control positive flow system of excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202416433U true CN202416433U (en) | 2012-09-05 |
Family
ID=46741212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220049703XU Expired - Fee Related CN202416433U (en) | 2012-02-16 | 2012-02-16 | Bucket rod speed reduction energy-saving system in hydraulic control positive flow system of excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202416433U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423225A (en) * | 2013-07-22 | 2013-12-04 | 四川泛水基电液机械有限责任公司 | Low-energy-consumption hydraulic open-type walking system and control method |
| CN106762905A (en) * | 2016-12-27 | 2017-05-31 | 恒天九五重工有限公司 | Pilot hydraulic control system and rig based on multi-joint shuttle valve group |
-
2012
- 2012-02-16 CN CN201220049703XU patent/CN202416433U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423225A (en) * | 2013-07-22 | 2013-12-04 | 四川泛水基电液机械有限责任公司 | Low-energy-consumption hydraulic open-type walking system and control method |
| CN103423225B (en) * | 2013-07-22 | 2015-10-28 | 四川泛水基电液机械有限责任公司 | A kind of low energy consumption hydraulic open type running gear and controlling method |
| CN106762905A (en) * | 2016-12-27 | 2017-05-31 | 恒天九五重工有限公司 | Pilot hydraulic control system and rig based on multi-joint shuttle valve group |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20180216 |