CN2386234Y - Unload-type change valve without internal leakage - Google Patents
Unload-type change valve without internal leakage Download PDFInfo
- Publication number
- CN2386234Y CN2386234Y CN 99229133 CN99229133U CN2386234Y CN 2386234 Y CN2386234 Y CN 2386234Y CN 99229133 CN99229133 CN 99229133 CN 99229133 U CN99229133 U CN 99229133U CN 2386234 Y CN2386234 Y CN 2386234Y
- Authority
- CN
- China
- Prior art keywords
- valve
- internal leakage
- piston
- valve body
- cone
- 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
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The utility model relates to an unloading change valve without internal leakage, which is formed by the connection and the combination of a slide change valve and an unloading hydraulic control one-way valve, wherein, one end in a valve body of the unloading hydraulic control one-way valve is provided with a cone valve provided with a spring, and the cone valve is in movable fit with an internal cavity of the valve body. The end of the cone valve is sealed with a line of a valve cavity, an oil hole is arranged on the cone valve, and the other end in the valve body is provided with a control piston provided with a push rod, wherein, the control piston is in movable fit with the internal cavity of the valve body. The control piston is in a hollow structure, a ring of unloading ring grooves are arranged in the radial direction of the front end of the piston, and the ring grooves are communicated with the hollow part of the piston by a set of throttle holes. When oil returns and oil pressure increases, the utility model can unload timely, can reduce power loss and the heat generation of systems, and is a novel change valve without internal leakage in hydraulic systems.
Description
The utility model relates to the hydraulic element in the mechanical field, and particularly a kind of discharging type does not have the structure of internal leakage selector valve.
A large amount of hydraulic pressure transfer power that use in the mechanical transmission, many occasions are all used one-way cylinder in hydraulic system at present, and the control oil cylinder motion spool-type valves that use more.Because this class selector valve is simple in structure, cost is low, and is widely adopted.Spool-type valves just inevitably brings the internal leakage of valve because of existing matching gap between valve rod and the valve body.Formulate the regulation of standard according to country, selector valve neutral position internal leakage is 80ml/mim, therefore selector valve is when the neutral position, oil cylinder can not rest on a certain position for a long time, new II type combine-harvester as the production of Xin Lian group, one-way cylinder is used in the ceding of Taiwan, because the ceding of Taiwan is from great, ceding of Taiwan meeting is fallen automatically during harvesting, the influence operation, for addressing this problem, new connection (group) proposes very high requirement (requirement reaches 0.02ml/mim) to selector valve neutral position internal leakage, and this is to be difficult to realize for spool-type valves.
The purpose of this utility model is: designing a kind of discharging type does not have the internal leakage selector valve, overcomes the defective that one-way valve leaks, and can reduce the heating of hydraulic system
The technical solution of the utility model is such: stack connects a discharging type Pilot operated check valve on spool-type valves, end in the valve body of this one-way valve has the cone valve of a band spring wire sealing, the other end in valve body has the control piston of a band push rod, control piston is a hollow structure, one circle off-load annular groove is radially arranged, there are several throttling pore of setting according to pressure unloading to communicate in the annular groove, so just formed discharging type and do not had the internal leakage selector valve with the piston hollow space.
Adopt this structure, when oil cylinder in uphill process, the off-load annular groove of control piston and drainback passage are connected, and control oily off-load, the unnecessary power loss of minimizing system
Fig. 1 is the utility model discharging type fluid-control one-way valve arrangement sectional view
Fig. 2 is applied to the fundamental diagram of an example for the utility model
Among the figure: 1 valve body, 2 springs, 3 cone valves, 4 oilholes, 5 push rods, 6 off-load annular grooves, 7 throttle orifices, 8 control pistons, 9 piston hollow portions, 10 valve pockets, 11 oil hydraulic pumps, 12 spool-type valves, 13 discharging type Pilot operated check valves, 14 one-way throttle valves, 15 piston type cylinders, 16 harvester headers, A
1High pressure oil inlet union, A
2High pressure oil outlet connection, B
1The load high pressure oil inlet
Introduce the utility model embodiment below in conjunction with accompanying drawing:
The cone valve 3 that a end in valve body 1 has a band spring 2 and valve body 1 are movingly, oilhole 4 is arranged on it, the control piston 8 that one band push rod 5 is arranged at the other end of valve body 1, piston 8 and valve body 1 are movingly, piston 8 has hollow portion 9, and an off-load annular groove 6 is arranged on piston 8, and several fuel-economizing holes 7 connect hollow portion 9 and off-load annular groove 6, there is valve pocket 10 at piston 8 rear portions, valve body 1 is fixed by bolts to just forms the selector valve that discharging type does not have internal leakage on the spool-type valves 12.
Now in conjunction with the example that is applied to newly join reaper, further set forth its working principle: as shown in Figure 2, when oil hydraulic pump 11 output high pressure oils, when manipulation selector valve 12 handles made selector valve 12 be in position, a left side, high pressure oil entered discharging type one-way valve A from the output of selector valve A mouth
1Mouthful, when high pressure oil through A
1Mouth enters in the valve body 1, and cone valve 3 pushes away spring 2 and moves to left under the oil pressure effect, and high pressure oil is from A
2Enter piston type cylinder 15 through one-way throttle valve 14, promote piston the ceding of Taiwan 16 is risen.
When manipulation selector valve 12 handles make selector valve 12 be in meta, the A mouth of selector valve 12 is closed, and the cone valve 3 of discharging type Pilot operated check valve 13 cuts out under the effect of oil cylinder fluid back pressure, and pressure oil is oil sump tank after the relief valve off-load, at this moment the oil cylinder drainback passage is closed, and the ceding of Taiwan 16 rests on the precalculated position.
The utility model is simple in structure, and is reliable, and oil pressure increases the problem that causes the hydraulic system heating to increase power consumpiton when fundamentally having solved the internal leakage of one-way valve and off-load, is a kind of novel no internal leakage selector valve of hydraulic system.
Claims (5)
1, a kind of discharging type does not have the internal leakage selector valve, it is characterized in that: it is connected with discharging type Pilot operated check valve (13) by spool-type valves (12) and is combined into one.
2, a kind of discharging type according to claim 1 does not have the internal leakage selector valve, it is characterized in that: the end in the valve body (1) of discharging type Pilot operated check valve (13) one band spring (2) arranged with valve body cone valve (3) movingly, the other end in the valve body (1) have a band push rod (5) and with valve body (1) control piston (8) movingly.
3, a kind of discharging type according to claim 2 does not have the internal leakage selector valve, it is characterized in that: oilhole (4) is arranged on the cone valve (3), and cone valve (3) end and body cavity are the linear sealing structure.
4, a kind of discharging type according to claim 2 does not have the internal leakage selector valve, it is characterized in that: control piston (8) has a hollow portion (9), and its front end radially has a circle off-load annular groove (6) to be communicated with piston hollow portion (9) through throttle orifice (7).
5, a kind of discharging type according to claim 2 does not have the internal leakage selector valve, it is characterized in that: there is valve pocket (10) at control piston (8) rear portion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99229133 CN2386234Y (en) | 1999-08-09 | 1999-08-09 | Unload-type change valve without internal leakage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99229133 CN2386234Y (en) | 1999-08-09 | 1999-08-09 | Unload-type change valve without internal leakage |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2386234Y true CN2386234Y (en) | 2000-07-05 |
Family
ID=34018412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99229133 Expired - Fee Related CN2386234Y (en) | 1999-08-09 | 1999-08-09 | Unload-type change valve without internal leakage |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2386234Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697184A (en) * | 2013-12-20 | 2014-04-02 | 中国北方车辆研究所 | Through-flow structure for sliding valve port |
-
1999
- 1999-08-09 CN CN 99229133 patent/CN2386234Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103697184A (en) * | 2013-12-20 | 2014-04-02 | 中国北方车辆研究所 | Through-flow structure for sliding valve port |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201003474Y (en) | Reciprocating-piston type double acting hydraulic compressor | |
| CN110185671A (en) | A kind of quadruped robot hydraulic power system of double pump source parallel connection fuel feeding | |
| CN209976952U (en) | Multifunctional valve bank for agricultural machinery | |
| CN206017110U (en) | A kind of multi-stage compression commutation valve type diaphragm type compressor | |
| CN113417900B (en) | Integrated high-pressure large-flow proportional overflow type unloading valve | |
| CN2386234Y (en) | Unload-type change valve without internal leakage | |
| CN107939473B (en) | Pilot valve controlled three-stage variable displacement oil pump | |
| CN2703909Y (en) | Two-oil-circuit micro hydraulic pump station | |
| CN202900841U (en) | Hydraulic pump station | |
| CN201513403U (en) | Multistage cylinder integrated control hydraulic valve group | |
| CN2224944Y (en) | Hydraulic multi-channel switching valve | |
| CN109469661A (en) | A kind of garbage-compressing double pump system hydraulic valve bank | |
| CN108825571A (en) | A kind of load-sensitive gear pump with variable capacity system | |
| CN2505632Y (en) | Pilot-controlled multi-way reversing valve | |
| CN211550114U (en) | Pressurizing hydraulic system | |
| CN208900435U (en) | A kind of efficient duplex pump power unit | |
| CN204041367U (en) | A kind of three grades of oil hydraulic pumps | |
| CN208734623U (en) | A kind of load-sensitive gear pump with variable capacity system | |
| CN108571479B (en) | Single-plunger supercharger | |
| CN218760662U (en) | Oil absorption pressurization system and tractor | |
| CN85203972U (en) | Reversing arrangment for supercharger | |
| CN110410373A (en) | A kind of multichannel valve block for hydraulic station | |
| CN215411311U (en) | TOLD series thin oil lubricating device based on modular design | |
| CN214616704U (en) | Variable lift mechanism for valve of methanol engine | |
| CN209134861U (en) | The flows forage grass block press such as double pump |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |