CN204553420U - A kind of wheeled tractor hydraulic system - Google Patents
A kind of wheeled tractor hydraulic system Download PDFInfo
- Publication number
- CN204553420U CN204553420U CN201520055911.4U CN201520055911U CN204553420U CN 204553420 U CN204553420 U CN 204553420U CN 201520055911 U CN201520055911 U CN 201520055911U CN 204553420 U CN204553420 U CN 204553420U
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- CN
- China
- Prior art keywords
- pressure
- distributor
- valve
- control valve
- gradient control
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired - Fee Related
Links
- 230000005540 biological transmission Effects 0.000 claims abstract description 12
- 239000012530 fluid Substances 0.000 claims description 22
- 239000000945 filler Substances 0.000 claims description 7
- 230000007423 decrease Effects 0.000 abstract description 7
- 230000003749 cleanliness Effects 0.000 abstract description 4
- 239000000314 lubricant Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 41
- 239000002516 radical scavenger Substances 0.000 description 10
- 230000009467 reduction Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Abstract
A kind of wheeled tractor hydraulic system, comprising: bitubular oil purifier, gear pump, pressure-gradient control valve, distributor, and hydraulic pressure exports valve block; Bitubular oil purifier is by fixed support and be bolted to transmission case side; Gear pump is bolted on motor wife gear chamber side; Pressure-gradient control valve is bolted on fixed support; Distributor is bolted on lifter housing; Hydraulic pressure exports valve block and is bolted on Multipath valve rack; Bitubular oil purifier, gear pump, pressure-gradient control valve, distributor, hydraulic pressure export between valve block by pipeline UNICOM.The working state of the equipments such as hydraulic pressure lift, hydraulic pressure output is realized by the function of pressure-gradient control valve by native system; When hydraulic lifting apparatus does not work, a large amount of lubricant oil directly exports valve block return oil filter inflow pump entrance in bitubular oil purifier by hydraulic pressure, enters short circle; Decrease the susceptibility of hydraulic system to oil cleanliness; Decrease hydraulic system card valve probability, whole system is of a tightly knit structure, careful.
Description
Technical field
The utility model belongs to tractor field, relates to a kind of wheeled tractor hydraulic system.
Background technique
At present, on existing high and medium power wheeled tractor, its hydraulic system oil is many from power train, due to the restriction of existing technological level, power train inner fluid turbidity test often cannot meet the functional requirement of hydraulic system, so just easily cause the appearance of the faults such as hydraulic system card valve.Therefore, can by rearranging and the improvement of component hydraulic system hydraulic element, hydraulic pressure in existing hydraulic system is exported the in parallel oil circuit of series connection oil circuit instead by special pressure-gradient control valve of valve block and distributor, increase bitubular oil purifier, change oil circuit Placement, just can greatly reduce the susceptibility of hydraulic system to oil cleanliness, decrease the card valve probability of hydraulic system, improve the reliability of hydraulic system.
Model utility content
The purpose of this utility model is to provide a kind of compact structure, uses wheeled tractor hydraulic system that is reliable, handling facility, by the reasonable combination to distributor, pressure-gradient control valve, hydraulic pressure delivery valve, oil purifier etc., conveniently can realize agricultural machinery and implement that tractor is joined and carry out functions such as promoting, decline and float, and meet the needs of hydraulic pressure output simultaneously.
The utility model can achieve the above object by the following technical programs: a kind of wheeled tractor hydraulic system, comprising: bitubular oil purifier, gear pump, pressure-gradient control valve, distributor, and hydraulic pressure exports valve block; Bitubular oil purifier is by fixed support and be bolted to transmission case side; Gear pump is bolted on motor wife gear chamber side; Pressure-gradient control valve is bolted on fixed support; Distributor is bolted on lifter housing; Hydraulic pressure exports valve block and is bolted on Multipath valve rack; Bitubular oil purifier, gear pump, pressure-gradient control valve, distributor, hydraulic pressure export between valve block by pipeline UNICOM.
The upper outlet of bitubular oil purifier is connected with the inlet port of gear pump by pipeline; The middle outlet of bitubular oil purifier is connected with bottom transmission case by pipeline; The lower outlet of bitubular oil purifier exports valve block return opening by pipeline and hydraulic pressure and is connected; The CF mouth of pressure-gradient control valve is connected with the filler opening of distributor by pipeline; The filler opening that the EF mouth of pressure-gradient control valve exports valve block by pipeline and hydraulic pressure is connected; The feedback hydraulic fluid port of pressure-gradient control valve is connected with the feedback hydraulic fluid port of distributor by pipeline; The safety valve return opening of pressure-gradient control valve is connected with the lower outlet of bitubular oil purifier by pipeline.
The utility model can reach following beneficial effect after adopting technique scheme: the working state of the equipments such as hydraulic pressure lift, hydraulic pressure output realized by the function of pressure-gradient control valve; When hydraulic lifting apparatus does not work, a large amount of lubricant oil directly exports valve block return oil filter inflow pump entrance in bitubular oil purifier by hydraulic pressure, enters short circle; Decrease the susceptibility of hydraulic system to oil cleanliness; Decrease hydraulic system card valve probability, whole system is of a tightly knit structure, careful.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of wheeled tractor hydraulic system of the utility model is arranged on tractor.
Fig. 2 is a kind of wheeled tractor hydraulic system of the utility model distributor meta and hydraulic pressure schematic diagram when exporting valve block meta.
Fig. 3 is a kind of wheeled tractor hydraulic system of the utility model distributor working position and hydraulic pressure schematic diagram when exporting valve block meta.
Fig. 4 is a kind of wheeled tractor hydraulic system of the utility model distributor meta and hydraulic pressure schematic diagram when exporting valve block working position.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further described.As shown in figures 1-4, a kind of wheeled tractor hydraulic system, mainly comprises: bitubular oil purifier 1, gear pump 2, pressure-gradient control valve 3, distributor 4, hydraulic pressure export valve block 5; Bitubular oil purifier 1 is by fixed support 6 and be bolted to transmission case 7 side; Gear pump 2 is bolted on motor wife gear chamber 8 side; Pressure-gradient control valve 3 is bolted on fixed support 6; Distributor 4 is bolted on lifter housing 9; Hydraulic pressure exports valve block 5 and is bolted on Multipath valve rack 10.Bitubular oil purifier 1, gear pump 2, pressure-gradient control valve 3, distributor 4, hydraulic pressure export between valve block 5 by pipeline UNICOM.
The upper outlet A of bitubular oil purifier 1 is connected with the inlet port B of gear pump 2 by pipeline; The middle outlet C of bitubular oil purifier 1 is connected with bottom transmission case 7 by pipeline; The lower outlet D of bitubular oil purifier 1 exports valve block 5 return opening E by pipeline and hydraulic pressure and is connected; The CF mouth of pressure-gradient control valve 3 is connected with the filler opening F of distributor 4 by pipeline; The filler opening G that the EF mouth of pressure-gradient control valve 3 exports valve block 5 by pipeline and hydraulic pressure is connected; The feedback hydraulic fluid port H of pressure-gradient control valve 3 is connected with the feedback hydraulic fluid port I of distributor 4 by pipeline; The safety valve return opening J of pressure-gradient control valve 3 is connected with the lower D that exports of bitubular oil purifier 1 by pipeline.
Under initial state, when namely distributor 4 and hydraulic pressure output valve block 5 all do not work, now gear pump 2 passes through the middle outlet C of bitubular oil purifier 1 from oil suction in transmission case, distributor 4 filler opening F is entered by the CF mouth of pressure-gradient control valve 3, now through distributor 4 fluid first in distributor 4 main valve overcome scavenger valve spring force in distributor 4, scavenger valve is opened, fluid restriction in distributor 4 like this through the CF mouth of pressure-gradient control valve 3 flows back to transmission case by scavenger valve in distributor 4, in distributor 4, the fluid of restriction produces pressure at restriction two ends, this pressure acts on the two ends of pressure-gradient control valve 3, after pressure difference exceedes pressure-gradient control valve 3 left end spring pressure, pressure-gradient control valve 3 is in left position, like this because pressure-gradient control valve 3 left springs are very weak, generally be designed to 1-2MPa, by the flow of restriction in distributor 4 for the pressure reduction produced during about 1.4L/min can promote the spring of pressure-gradient control valve 3, ensure that next oily only about the 1.4L/min of gear pump 2 flows back to transmission case by scavenger valve in distributor 4, all the other most of fluid are all exported valve block 5 through hydraulic pressure and are entered the entrance of gear pump 2 by the lower outlet D of bitubular oil purifier 1, whole system enters short circle, and the oil-suction oil filter of bitubular oil purifier 1 is the leakage of replenishment system and the fluid that flows back to from distributor 4 only, when the return oil filter pressure reduction of bitubular oil purifier 1 exceedes return oil filter bypass valve pressure, bypass valve is opened.
When distributor 4 is in working position, hydraulic pressure exports valve block 5 and is in meta, and namely distributor 4 works, and when hydraulic pressure output valve block 5 does not work, now by the hydraulic oil of gear pump 2, enters distributor 4 by the CF mouth of pressure-gradient control valve 3.Now distributor 4 main valve is in running order, logical fuel tank on the left of the scavenger valve in distributor 4, and the scavenger valve in distributor 4 is in closed condition under the spring action of right side; In distributor 4, the fluid of restriction cannot produce pressure at restriction two ends, and pressure-gradient control valve 3, under left end spring pressure, is in right position, and such oil pump is next oily all enters distributor 4, carries out work; When system pressure exceed pressure-gradient control valve 3 set safety valve pressure time, the safety valve of pressure-gradient control valve 3 is opened, and protects the safe and reliable of hydraulic system;
When distributor 4 is in meta, hydraulic pressure exports valve block 5 and is in working position, namely distributor 4 does not work, when hydraulic pressure output valve block 5 works, now by the hydraulic oil of gear pump 2, enter distributor 4 by the CF mouth of pressure-gradient control valve 3, through the fluid first main valve in distributor 4 of distributor 4, overcome scavenger valve spring force in distributor 4, scavenger valve is opened, fluid restriction in distributor 4 like this through the CF mouth of pressure-gradient control valve 3 flows back to transmission case by scavenger valve in distributor 4, in distributor 4, the fluid of restriction produces pressure at restriction two ends, this pressure acts on the two ends of pressure-gradient control valve 3, after pressure difference exceedes pressure-gradient control valve 3 left end spring pressure, pressure-gradient control valve 3 is in left position, because pressure-gradient control valve 3 left springs are very weak, generally be designed to 1-2MPa, by the flow of restriction in distributor 4 for the pressure reduction produced during about 1.4L/min can promote pressure-gradient control valve 3 spring, ensure that next oily only about the 1.4L/min of gear pump 2 flows back to transmission case by scavenger valve in distributor 4, all the other most of fluid all enter hydraulic pressure output valve block 5 through the EF mouth of pressure-gradient control valve 3 and carry out work, along with hydraulic pressure exports the increase of valve block 5 delivery outlet pressure, cause the increase of the inlet pressure entering pressure-gradient control valve 3, produce larger pressure reduction by the entrance of pressure-gradient control valve 3 and CF outlet port, but due to very little through fluid flow herein, be unlikely to the heating causing system, the leakage of the oil-suction oil filter of bitubular oil purifier 1 only replenishment system, the fluid exporting fluid and flow back to from distributor 4, when the return oil filter pressure reduction of bitubular oil purifier 1 exceedes return oil filter bypass valve pressure, bypass valve is opened.
Whole system ensure that hydraulic system enters short circle in the working time more than 80%; During hydraulic system enters short circle, the oil cleanliness of hydraulic system can be fully guaranteed; The oil-suction oil filter of bitubular oil purifier 1 is in the leakage of the only replenishment system working time more than 90%, and the fluid exporting fluid and flow back to from distributor 4, greatly strengthen the anti-soil time, decrease the maintenance of system.
Claims (2)
1. a wheeled tractor hydraulic system, comprising: bitubular oil purifier (1), gear pump (2), pressure-gradient control valve (3), distributor (4), hydraulic pressure export valve block (5); It is characterized in that: bitubular oil purifier (1) is by fixed support (6) and be bolted to transmission case (7) side; Gear pump (2) is bolted on motor wife gear chamber (8) side; Pressure-gradient control valve (3) is bolted on fixed support (6); Distributor (4) is bolted on lifter housing (9); Hydraulic pressure exports valve block (5) and is bolted on Multipath valve rack (10); Bitubular oil purifier (1), gear pump (2), pressure-gradient control valve (3), distributor (4), hydraulic pressure export between valve block (5) by pipeline UNICOM.
2. a kind of wheeled tractor hydraulic system according to claim 1, is characterized in that: the upper outlet (A) of bitubular oil purifier (1) is connected with the inlet port (B) of gear pump (2) by pipeline; The middle outlet (C) of bitubular oil purifier (1) is connected with transmission case (7) bottom by pipeline; The lower outlet (D) of bitubular oil purifier (1) exports valve block (5) return opening (E) by pipeline and hydraulic pressure and is connected; (CF) mouth of pressure-gradient control valve (3) is connected with the filler opening (F) of distributor (4) by pipeline; The filler opening (G) that (EF) mouth of pressure-gradient control valve (3) exports valve block (5) by pipeline and hydraulic pressure is connected; The feedback hydraulic fluid port (H) of pressure-gradient control valve (3) is connected with the feedback hydraulic fluid port (I) of distributor (4) by pipeline; The safety valve return opening (J) of pressure-gradient control valve (3) is connected with the lower outlet (D) of bitubular oil purifier (1) by pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055911.4U CN204553420U (en) | 2015-01-27 | 2015-01-27 | A kind of wheeled tractor hydraulic system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520055911.4U CN204553420U (en) | 2015-01-27 | 2015-01-27 | A kind of wheeled tractor hydraulic system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204553420U true CN204553420U (en) | 2015-08-12 |
Family
ID=53828536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520055911.4U Expired - Fee Related CN204553420U (en) | 2015-01-27 | 2015-01-27 | A kind of wheeled tractor hydraulic system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204553420U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564919A (en) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | Hydraulic system of wheeled tractor |
-
2015
- 2015-01-27 CN CN201520055911.4U patent/CN204553420U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104564919A (en) * | 2015-01-27 | 2015-04-29 | 第一拖拉机股份有限公司 | Hydraulic system of wheeled tractor |
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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: 20150812 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |