CN203784006U - Feedback compensation type hydraulic unloading valve - Google Patents
Feedback compensation type hydraulic unloading valve Download PDFInfo
- Publication number
- CN203784006U CN203784006U CN201420154913.4U CN201420154913U CN203784006U CN 203784006 U CN203784006 U CN 203784006U CN 201420154913 U CN201420154913 U CN 201420154913U CN 203784006 U CN203784006 U CN 203784006U
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- valve
- oil
- enclosed cavity
- plug
- communicated
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Abstract
The utility model discloses a feedback compensation type hydraulic unloading valve. The feedback compensation type hydraulic unloading valve comprises an oil way plate, an unloading valve core and a plug. The oil way plate and the unloading valve core are cooperated to form a first enclosed cavity the sectional area of which is S1. The first enclosed cavity is communicated with a first oil way of the oil way plate. A valve stand with a through hole in the middle is disposed under the unloading valve core, and the sectional area of the through hole is S2. A lower transverse plane of the valve stand is equipped with a valve ball that can seal the through hole. The valve stand, the valve ball, the unloading valve core and the inner wall of the oil way plate together form a second enclosed cavity which is communicated with a second oil way of the oil way plate. The plug seals the lower portion of the oil way plate. A valve ball reset assembly is arranged between the plug and the valve ball. The plug, the valve stand, the valve ball and the inner wall of the oil way plate together form a third enclosed cavity which is communicated with a third oil way of the oil way plate. The first oil way and the third oil way are communicated. The second oil way and an oil tank are communicated to form an unloading oil return channel. The sectional area S1 of the first enclosed cavity is smaller than the sectional area S2 of the through hole.
Description
Technical field
The utility model relates to a kind of hydraulic unloading valve, is specially a kind of feedback compensation type hydraulic unloading valve; Be mainly used in realizing pressurized oil system earth pressure release, belong to unloading valve field in the pressure controlled valve of hydraulic control valve.
Background technique
Hydraulic system is widely used in the every field of mechanical industry, unloading valve major control hydraulic system off-load and loading, be generally used in oil hydraulic circuit, unloading valve is to utilize the break-make of controlling hydraulic circuit oil hydraulic pump is shut down or make it turning round or make hydraulic actuator unloading under low voltage difference very much, realizes the valve class of controlling hydraulic system off-load and loading.
Conventional unloading valve adopts thread-locking type more at present, this type of valve body structure adopts one-way valve along pressing the mode of closing, while closing, screw-threaded coupling power is large, otherwise off-load opening force is also large, due to needs manually-operable off-load, use inconvenient, there is supercharging time delay length, ineffective shortcoming, even if non-manual operation, uses other power operations instead, the switching mechanism more complicated of its power needing; Another common structure adopts one-way valve back pressure to close mode, open and close and adopt sliding spool control, though this structure has overcome, spiral unloading valve supercharging time delay is long, the low problem of keying sensitivity, but unloading valve opening force has not yet to see and reduces, it is still the suffered counterpressure in full of one-way valve, unloading valve is opened and is existed inertia can cause pressing instantaneous loss of pressure excessive velocities in system, and load produces impact, causes system failure.So need in the hydraulic system of Manpower operating unloading valve at some, traditional unloading valve cannot meet the laborsaving requirement of use.
In addition, existing rotary type hydraulic unloading valve, employing one-way valve is closed mode along pressing, and while closing, screw-threaded coupling power is large, and off-load opening force is also large, uses inconvenience, has supercharging time delay length, ineffective shortcoming.Existing sliding valve style unloading valve, adopts one-way valve back pressure to cut out mode, and unloading valve opening force is large, is the problem of the suffered counterpressure in full of one-way valve.Existing sliding valve style unloading valve, unloading valve is opened and is existed inertia can cause pressing instantaneous loss of pressure excessive velocities in system, and load produces impact, causes system failure.
Therefore, design a kind of sealing means reliable, open and close highly sensitively, operating energy-conservation unloading valve is association area problem demanding prompt solution.
Model utility content
The purpose of this utility model is for a kind of feedback compensation type hydraulic unloading valve is provided, to solve the problems referred to above of prior art.
The utility model takes following technological scheme to realize:
A kind of feedback compensation type hydraulic unloading valve, comprises oil-way board, off-load spool and plug; After described oil-way board coordinates with off-load spool, form the first enclosed cavity, its sectional area is S
1, described the first enclosed cavity is communicated with the first oil circuit of oil-way board; Below off-load spool, be provided with the valve seat that center is through hole, the sectional area of through hole is S
2; The lower end surface of valve seat is provided with the valve ball that can seal through hole; Valve seat, valve ball, off-load spool and oil-way board inwall form the second enclosed cavity, and described the second enclosed cavity is communicated with the second oil circuit of oil-way board; The underpart of described plug closing oil path plate, is provided with valve ball reset assembly between plug and valve ball; The inwall of described plug, valve seat, valve ball and oil-way board forms the 3rd enclosed cavity, and the 3rd enclosed cavity is communicated with the 3rd oil circuit of oil-way board; Described the first oil circuit and the 3rd oil circuit are communicated with, and described the second oil circuit is communicated with fuel tank for off-load drainback passage, described the first enclosed cavity sectional area S
1be less than through hole sectional area S
2.
Be provided with a mounting hole at unloading valve core head, pack into successively after the first spring, spring capping, then fix with cotter pin, the first spring plays the unloaded effect resetting of off-load spool.
Described off-load spool cylindrical is Step Shaft, is provided with two circle mounting grooves, and an O shape circle and the 2nd O shape circle are installed respectively in mounting groove, for the sealing of the first enclosed cavity; Described valve seat cylindrical is provided with mounting groove, and the 3rd O shape circle is installed in mounting groove, and the 3rd O shape circle is used for sealing oil circuit, prevents that high low pressure oil circuit (the second oil circuit and the 3rd oil circuit) is communicated with; Plug cylindrical upper end is cylindrical section, is provided with mounting groove, and the 4th O shape circle is installed in mounting groove, prevents that hydraulic oil from leaking outside.
The through hole lower end at described valve seat center is valve seat valve line; Valve ball reset assembly comprises the valve ball seat and the second spring that are contained in plug mounting hole, supports valve ball and the laminating of valve seat valve line by reset assembly, forms unloading one-way valve, and valve ball side is born system pressure.
The lower end of described plug is that thread section coordinates with oil-way board spiral, locking valve seat.
Principle of the present utility model is: valve ball opens and closes oil circuit as one-way valve, the spool of promotion off-load is downwards opened valve ball makes pressure oil circuit (the 3rd oil circuit) be communicated with off-load oil circuit (the second oil circuit), before valve ball is opened, the first enclosed cavity is subject to action of hydraulic force to produce downward power, this power participates in off-load, and the off-load opening force of outside input is reduced.
Beneficial effect of the present invention is:
1) load off-load opening force reduces, and reaches energy-conservation object.
2) load off-load opening force reduces, and avoids pressing instantaneous loss of pressure excessive velocities, load to produce in system and impacts the damage that causes system.
3) unloading valve back pressure closing structure design, reduces the load response time, has improved efficiency.
Brief description of the drawings
Fig. 1 is assembly structure schematic diagram of the present utility model;
Fig. 2 is cross-sectional view of the present utility model;
Wherein, 1, cotter pin, 2, spring capping, 3, the first spring, 4, oil-way board, 5, an O shape circle, 6, off-load spool, 7, the 2nd O shape circle, 8, the 3rd O shape circle, 9, valve seat, 10, valve ball, 11, valve ball seat, 12, the second spring, 13, the 4th O shape circle, 14, plug, 401, the first enclosed cavity, 402, the first oil circuit, 403, the second enclosed cavity, 404, the second oil circuit, 405, the 3rd oil circuit, 406, the 3rd enclosed cavity, 901, through hole.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further illustrated.
Referring to Fig. 1 and Fig. 2, a kind of feedback compensation type hydraulic unloading valve, comprises oil-way board 4, off-load spool 6 and plug 14; After described oil-way board 4 coordinates with off-load spool 6, form the first enclosed cavity 401, its sectional area is S
1, described the first enclosed cavity 401 is communicated with the first oil circuit 402 of oil-way board 4; The center that is provided with below off-load spool 6 is the valve seat 9 of through hole 901, and the sectional area of through hole 901 is S
2; The lower end surface of valve seat 9 is provided with the valve ball 10 that can seal through hole; Valve seat 9, valve ball 10, off-load spool 6 and oil-way board 5 inwalls form the second enclosed cavity 403, and described the second enclosed cavity 403 is communicated with the second oil circuit 404 of oil-way board 4; The underpart of described plug 14 closing oil path plates 4, is provided with valve ball reset assembly between plug 14 and valve ball 10; The inwall of described plug 14, valve seat 9, valve ball 10 and oil-way board 4 forms the 3rd enclosed cavity 406, the three enclosed cavities 406 and is communicated with the 3rd oil circuit 405 of oil-way board 4; Described the first oil circuit 402 and the 3rd oil circuit 405 are communicated with, and described the second oil circuit 404 is communicated with fuel tank for off-load drainback passage, described the first enclosed cavity 401 sectional area S
1be less than through hole 901 sectional area S
2.
Be provided with a mounting hole at off-load spool 6 heads, pack into successively after the first spring 3, spring capping 2, more fixing with cotter pin 1, the first spring 3 plays the unloaded effect resetting of off-load spool.
Described off-load spool 6 cylindricals are Step Shaft, are provided with two circle mounting grooves, and an O shape circle 5 and the 2nd O shape circle 7 are installed respectively in mounting groove, for the sealing of the first enclosed cavity 401; Described valve seat 9 cylindricals are provided with mounting groove, and the 3rd O shape circle 8, the three O shape circles 8 are installed in mounting groove for sealing oil circuit, prevent that high low pressure oil circuit (the second oil circuit 404 and the 3rd oil circuit 405) is communicated with; Plug 14 cylindrical upper ends are cylindrical section, are provided with mounting groove, and the 4th O shape circle 13 is installed in mounting groove, prevent that hydraulic oil from leaking outside.
Through hole 901 lower ends at described valve seat 9 centers are valve seat valve line; Valve ball 10 reset assemblies comprise the valve ball seat 11 and the second spring 12 that are contained in plug 14 mounting holes, support valve ball 10 and valve seat 9 valve line laminatings by reset assembly, form unloading one-way valve, and valve ball side is born system pressure.
The lower end of described plug 14 is that thread section coordinates with oil-way board 4 spirals, locking valve seat 9.
In addition to the implementation, all employings are equal to the technological scheme of replacement or equivalent transformation formation, all drop on the protection domain of the utility model requirement.
Claims (5)
1. a feedback compensation type hydraulic unloading valve, comprises oil-way board, off-load spool and plug; It is characterized in that: after described oil-way board coordinates with off-load spool, form the first enclosed cavity, its sectional area is S
1, described the first enclosed cavity is communicated with the first oil circuit of oil-way board; Below off-load spool, be provided with the valve seat that center is through hole, the sectional area of through hole is S
2; The lower end surface of valve seat is provided with the valve ball that can seal through hole; Valve seat, valve ball, off-load spool and oil-way board inwall form the second enclosed cavity, and described the second enclosed cavity is communicated with the second oil circuit of oil-way board; The underpart of described plug closing oil path plate, is provided with valve ball reset assembly between plug and valve ball; The inwall of described plug, valve seat, valve ball and oil-way board forms the 3rd enclosed cavity, and the 3rd enclosed cavity is communicated with the 3rd oil circuit of oil-way board; Described the first oil circuit and the 3rd oil circuit are communicated with, and described the second oil circuit is communicated with fuel tank for off-load drainback passage, described the first enclosed cavity sectional area S
1be less than through hole sectional area S
2.
2. a kind of feedback compensation type hydraulic unloading valve according to claim 1, is characterized in that: be provided with a mounting hole at unloading valve core head, pack into successively after the first spring, spring capping, then fix with cotter pin.
3. a kind of feedback compensation type hydraulic unloading valve according to claim 1, is characterized in that: described off-load spool cylindrical is Step Shaft, is provided with two circle mounting grooves, and an O shape circle and the 2nd O shape circle are installed respectively in mounting groove; Described valve seat cylindrical is provided with mounting groove, and the 3rd O shape circle is installed in mounting groove; Plug cylindrical upper end is cylindrical section, is provided with mounting groove, and the 4th O shape circle is installed in mounting groove.
4. a kind of feedback compensation type hydraulic unloading valve according to claim 1, is characterized in that: the through hole lower end at described valve seat center is valve seat valve line; Valve ball reset assembly comprises the valve ball seat and the second spring that are contained in plug mounting hole, supports valve ball and the laminating of valve seat valve line by reset assembly.
5. a kind of feedback compensation type hydraulic unloading valve according to claim 1, is characterized in that: the lower end of described plug is that thread section coordinates with oil-way board spiral, locking valve seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154913.4U CN203784006U (en) | 2014-04-01 | 2014-04-01 | Feedback compensation type hydraulic unloading valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420154913.4U CN203784006U (en) | 2014-04-01 | 2014-04-01 | Feedback compensation type hydraulic unloading valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203784006U true CN203784006U (en) | 2014-08-20 |
Family
ID=51320198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420154913.4U Withdrawn - After Issue CN203784006U (en) | 2014-04-01 | 2014-04-01 | Feedback compensation type hydraulic unloading valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203784006U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912536A (en) * | 2014-04-01 | 2014-07-09 | 嘉善海力达工具有限公司 | Feedback compensation type hydraulic unloading valve |
-
2014
- 2014-04-01 CN CN201420154913.4U patent/CN203784006U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103912536A (en) * | 2014-04-01 | 2014-07-09 | 嘉善海力达工具有限公司 | Feedback compensation type hydraulic unloading valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140820 Effective date of abandoning: 20160302 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |