CN102444159A - Walking motor protection method for extremely cold region - Google Patents
Walking motor protection method for extremely cold region Download PDFInfo
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- CN102444159A CN102444159A CN2011102820815A CN201110282081A CN102444159A CN 102444159 A CN102444159 A CN 102444159A CN 2011102820815 A CN2011102820815 A CN 2011102820815A CN 201110282081 A CN201110282081 A CN 201110282081A CN 102444159 A CN102444159 A CN 102444159A
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- running motor
- overflow valve
- valve group
- extremely cold
- cold area
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000002277 temperature effect Effects 0.000 description 1
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- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a method for protecting a traveling motor in an extremely cold region, which is applied to the traveling motor, wherein an overflow valve group is arranged, an oil inlet of the overflow valve group is communicated with a high-speed traveling pressure oil source of the traveling motor, and a first oil drainage port on the overflow valve group is led to be connected with a second oil drainage port on the traveling motor. The overflow valve group is a pilot type overflow valve group, and pilot oil overflowed by the overflow valve group is connected into a second oil drainage port of the walking motor. The overflow valve comprises a main valve core and a one-way valve, and the one-way valve is arranged between the main valve core and the main oil return port. Compared with the prior art, the invention has the beneficial effects that: 1. the piston and the cylinder in the traveling motor of the hydraulic excavator working in extremely cold regions can be effectively protected; 2. normal work of the motor cannot be influenced at normal temperature, and the working process is simple and reliable.
Description
Technical field
The present invention relates to the running motor resist technology, relate in particular to a kind of running motor guard method that is used for extremely cold area.
Background technology
Rotary motor in the modern full hydraulic excavator is the critical component of slew gear, and it is to change the oil pressure that main pump provides into mechanical energy, is input to reduction box.The operation crawler-mounted excavator of (environment temperature is below subzero 30 degree) in extremely cold area; Usually operating mode is: excavator is accomplished handling operation on a working platform; Very little moving only carried out in walking; Because running motor only carries out work once in a while, receiving under the ambient temperature effect, be easy to damage the piston and the cylinder body of running motor.
Present general solution: the fit clearance of oversize piston and cylinder body; Piston, cylinder body are reduced by the influence of temperature change difference when motor operations; But such solution can increase leakage, influences operating efficiency, and this adverse effect then seems more obvious in other season.
Summary of the invention
To the problem of above-mentioned existence, the purpose of this invention is to provide a kind of running motor guard method that is used for extremely cold area, make hydraulic crawler excavator under extremely cold temperature condition, also can carry out the motor walking smoothly.
The objective of the invention is to realize through following technical proposals:
A kind of running motor guard method that is used for extremely cold area; Be applied on the running motor; Wherein, One overflow valve group is set, and the oiler of said overflow valve group and the said running motor pressure oil-source of walking at a high speed is communicated with, first drain tap on the said overflow valve group by cause with said running motor on second drain tap be connected.
The above-mentioned running motor guard method that is used for extremely cold area, wherein, said overflow valve group is the pilot-type relief valve group, the guide oil that its overflow goes out inserts in second drain tap of said running motor.
The above-mentioned running motor guard method that is used for extremely cold area, wherein, said overflow valve comprises main valve plug and one way valve, said one way valve is located between said main valve plug and the main oil return opening.
The above-mentioned running motor guard method that is used for extremely cold area, wherein, said one way valve setting pressure is lower than the highest draining pressure that said running motor can bear.
The above-mentioned running motor guard method that is used for extremely cold area, wherein, the running parameter of said overflow valve group is 35Bar, and working flow is 15L/min, and the opening pressure of said one way valve is 1.6Bar ± 0.15Bar.
The above-mentioned running motor guard method that is used for extremely cold area, wherein, the operating temperature of said running motor is subzero 30 ℃.
Compared with present technology, beneficial effect of the present invention is:
1, can effectively protect inner piston and the cylinder body of running motor at the hydraulic crawler excavator of extremely cold district work;
2, can not influence the motor operate as normal at normal temperatures, workflow is simple and reliable.
Description of drawings
Fig. 1 is hydraulic crawler excavator that the present invention is used for the running motor guard method in the extremely cold area overall structure sketch map of getting off;
Fig. 2 is the local enlarged diagram of the overflow valve group of the present invention's running motor guard method of being used for extremely cold area.
The specific embodiment
Below in conjunction with schematic diagram and concrete operations embodiment the present invention is described further.
As shown in Figure 1, the present invention is used for the running motor guard method in extremely cold area, is applied on the running motor of hydraulic crawler excavator, and in extremely cold area, the operating temperature of running motor can reach subzero 30 ℃.Running motor comprises that left lateral walks motor 01 and walk motor 02 with right lateral, and left lateral is walked motor 01 and walked motor 02 with right lateral and be intersected in centre revolving joint 1.One overflow valve group 2 is set therein; The oiler of overflow valve group 2 and the running motor pressure oil-source of walking at a high speed is communicated with; Specifically can realize through below swivel coupling, adding modes such as two-position three-way valve; First drain tap on the overflow valve group 2 by cause with running motor 01,02 on second drain tap be connected, connected mode can realize through some sebific ducts and union.
As shown in Figure 2, overflow valve group 2 is the pilot-type relief valve group, and the guide oil that its overflow goes out inserts in second drain tap of running motor.Overflow valve group 2 comprises main valve plug 21 and one way valve 22, and one way valve 22 is located between main valve plug 21 and the main oil return inlet T.
The setting pressure of one way valve 22 is lower than the highest draining pressure that running motor can bear, to protect motor shell pressure can not exceed standard and to damage.When system's operate as normal, valve closing, the limit of having only load to surpass regulation is opened overflow when (system pressure surpasses set pressure), carries out overload protection, and system pressure is no longer increased.Particularly, the running parameter of overflow valve group 2 is 35Bar, and working flow is 15L/min, and the opening pressure of one way valve 22 is 1.6Bar ± 0.15Bar.
To sum up; The present invention gets secondary walking guide oil; Add overflow valve group 2 and it is caused running motor one drain tap, make running motor hydraulic oil in the running motor housing when not working also can keep mobile, the assurance motor can be worked under higher temperature; With the extremely cold working environment of opposing, start the high-speed row walking modes during work in advance and get final product.
More than specific embodiment of the present invention is described in detail, but the present invention is not restricted to the specific embodiment of above description, it is just as example.To those skilled in the art, any equivalent modifications that this running motor guard method that is used for extremely cold area is carried out with substitute also all among category of the present invention.Therefore, not breaking away from impartial conversion and the modification of having done under the spirit and scope of the present invention, all should contain within the scope of the invention.
Claims (6)
1. running motor guard method that is used for extremely cold area; Be applied on the running motor; It is characterized in that; One overflow valve group is set, and the oiler of said overflow valve group and the said running motor pressure oil-source of walking at a high speed is communicated with, first drain tap on the said overflow valve group by cause with said running motor on second drain tap be connected.
2. the running motor guard method that is used for extremely cold area according to claim 1 is characterized in that said overflow valve group is the pilot-type relief valve group, and the guide oil that its overflow goes out inserts in second drain tap of said running motor.
3. the running motor guard method that is used for extremely cold area according to claim 2 is characterized in that said overflow valve comprises main valve plug and one way valve, and said one way valve is located between said main valve plug and the main oil return opening.
4. the running motor guard method that is used for extremely cold area according to claim 3 is characterized in that said one way valve setting pressure is lower than the highest draining pressure that said running motor can bear.
5. the running motor guard method that is used for extremely cold area according to claim 3 is characterized in that the running parameter of said overflow valve group is 35Bar, and working flow is 15L/min, and the opening pressure of said one way valve is 1.6Bar ± 0.15Bar.
6. according to any described running motor guard method that is used for extremely cold area in the claim 1 to 5, it is characterized in that the operating temperature of said running motor is subzero 30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110282081 CN102444159B (en) | 2011-09-22 | 2011-09-22 | Method for protecting travel motor in extremely cold area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110282081 CN102444159B (en) | 2011-09-22 | 2011-09-22 | Method for protecting travel motor in extremely cold area |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102444159A true CN102444159A (en) | 2012-05-09 |
| CN102444159B CN102444159B (en) | 2013-08-14 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110282081 Expired - Fee Related CN102444159B (en) | 2011-09-22 | 2011-09-22 | Method for protecting travel motor in extremely cold area |
Country Status (1)
| Country | Link |
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| CN (1) | CN102444159B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001193705A (en) * | 2000-01-12 | 2001-07-17 | Hitachi Constr Mach Co Ltd | Hydraulic driving device |
| CN201288713Y (en) * | 2008-10-22 | 2009-08-12 | 上海立新液压有限公司 | Unloading relief valve |
| CN201443319U (en) * | 2009-07-17 | 2010-04-28 | 刘成新 | Automatic hydraulic pressure regulation device for drill bit of ground anchor machine |
| US20110173964A1 (en) * | 2008-10-31 | 2011-07-21 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system for construction machine |
-
2011
- 2011-09-22 CN CN 201110282081 patent/CN102444159B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001193705A (en) * | 2000-01-12 | 2001-07-17 | Hitachi Constr Mach Co Ltd | Hydraulic driving device |
| CN201288713Y (en) * | 2008-10-22 | 2009-08-12 | 上海立新液压有限公司 | Unloading relief valve |
| US20110173964A1 (en) * | 2008-10-31 | 2011-07-21 | Hitachi Construction Machinery Co., Ltd. | Hydraulic drive system for construction machine |
| CN201443319U (en) * | 2009-07-17 | 2010-04-28 | 刘成新 | Automatic hydraulic pressure regulation device for drill bit of ground anchor machine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102444159B (en) | 2013-08-14 |
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Granted publication date: 20130814 Termination date: 20150922 |
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