CN204212971U - A kind of hydraulic pump control valve with damping structure - Google Patents
A kind of hydraulic pump control valve with damping structure Download PDFInfo
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- CN204212971U CN204212971U CN201420615911.0U CN201420615911U CN204212971U CN 204212971 U CN204212971 U CN 204212971U CN 201420615911 U CN201420615911 U CN 201420615911U CN 204212971 U CN204212971 U CN 204212971U
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- damping hole
- damping
- valve body
- spool
- hydraulic pump
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Abstract
The utility model discloses a kind of hydraulic pump control valve with damping structure, include valve body and be installed on the spool in described valve body, valve body is provided with pressure oil port, actuator port and return opening, wherein, both sides valve body being positioned at middle part oil circuit offer the first damping hole and the second damping hole respectively, the width of the first damping hole and the second damping hole is equal, and the width of spool equals the distance of described first damping hole left end to the second damping hole left end.The utility model has the advantage of: structure is simple, by offering the first equal damping hole of width and the second damping hole respectively in the both sides by valve body being positioned at middle part oil circuit, in spool moving process, leakage rate increases to maximum value from " 0 " and is reduced to gradually " 0 " again, the less spool resistance that makes of this damping structure pressure amplitude in whole process is adopted to diminish, hydraulic circuit switches freely, and can moment impact be effectively reduced, reduce pressure shake, make pressure more stable.
Description
Technical field
The utility model relates to technical field of hydraulic, particularly relates to a kind of hydraulic pump control valve with damping structure.
Background technique
Oil hydraulic pump is the dynamical element of hydraulic system, and its effect is the pressure energy mechanical energy of prime mover being converted to liquid, and it provides power to whole hydraulic system.The structural type of oil hydraulic pump generally has gear pump, vane pump and plunger pump.Control valve in oil hydraulic pump plays the keying of hydraulic control pump and the effect of hydraulic control oil flow, and the performance of control valve will directly have influence on the quality of whole oil hydraulic pump.
The effect of buffering steady pressure and flow is played in damping in oil hydraulic pump control valve, and existing hydraulic control valve can adopt the mode arranging damping plug screw to realize usually.But the size of the damping hole of this structure is fixing, cannot change, and therefore its structure is further improved.
Summary of the invention
Technical problem to be solved in the utility model is the present situation for prior art, provides structure simple, easily manufactured, and can effectively reduce a kind of hydraulic pump control valve with damping structure of moment impact.
The utility model solves the problems of the technologies described above adopted technological scheme:
A kind of hydraulic pump control valve with damping structure, include valve body and be installed on the spool in described valve body, valve body is provided with pressure oil port, actuator port and return opening, wherein, both sides valve body being positioned at middle part oil circuit offer the first damping hole and the second damping hole respectively, the width of the first damping hole and the second damping hole is equal, and the width of spool equals the distance of described first damping hole left end to the second damping hole left end.
For optimizing technique scheme, the concrete measure taked also comprises:
The left side, the cross section semicircular in shape structure of above-mentioned middle part oil circuit, rectangular structure on the right of its cross section.
Two angles on the right side of above-mentioned rectangular configuration are fillet.
Above-mentioned spool matches with spring, and the two ends of spring are respectively arranged with the first spring seat and the second spring seat, and the first spring seat is connected with the valve core rod being provided with spool, and the second spring seat and the fixed base be installed on valve body are connected.
The center of above-mentioned fixed base is provided with adjusting screw rod.
Seal ring is provided with between above-mentioned fixed base and described valve body.
Compared with prior art, a kind of hydraulic pump control valve with damping structure of the utility model, it offers the first damping hole and the second damping hole respectively by both sides valve body being positioned at middle part oil circuit, existing damping plug screw is acted on behalf of with the first damping hole and the second damping hole, and because the width of the first damping hole and the second damping hole is equal, in spool moving process, the opening summation of the first damping hole and the second damping hole keeps inconvenience, and leakage rate increases to maximum value from " 0 " is reduced to " 0 " more gradually, the less spool resistance that makes of this damping structure pressure amplitude in whole process is adopted to diminish, hydraulic circuit switches freely, and can moment impact be effectively reduced, reduce pressure shake, make pressure more stable.
In addition, the left side, the cross section semicircular in shape structure of middle part oil circuit, rectangular structure on the right of its cross section; The rectangular configuration on the right can be amassed by increasing section, thus makes working oil enter fuel tank faster, makes response become sensitiveer.
Accompanying drawing explanation
Fig. 1 is sectional structure schematic diagram of the present utility model;
Fig. 2 is I portion enlarged view in Fig. 1;
Fig. 3 is that the A of Fig. 2 is to structural representation;
Fig. 4 makes II enlarged view in Fig. 1.
Embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
Embodiment as shown in Figures 1 to 4,
Figure grade illustrates: valve body 1, pressure oil port 11, actuator port 12, return opening 13, spool 2, valve core rod 21, middle part oil circuit 3, first damping hole 4, second damping hole 5, spring 6, first spring seat 61, second spring seat 62, fixed base 7, adjusting screw rod 71, seal ring 72.
As shown in Figures 1 to 4,
A kind of hydraulic pump control valve with damping structure of the utility model, include valve body 1 and be installed on the spool 2 in described valve body 1, valve body 1 is provided with pressure oil port 11, actuator port 12 and return opening 13, wherein, both sides valve body 1 being positioned at middle part oil circuit 3 offer the first damping hole 4 and the second damping hole 5 respectively, the width of the first damping hole 4 and the second damping hole 5 is equal, and the width of spool 2 equals the distance of described first damping hole 4 left end to the second damping hole 5 left end.
The inner side of the first damping hole 4 and the second damping hole 5 communicates with middle part oil circuit 3.
In embodiment, the left side, the cross section semicircular in shape structure of middle part oil circuit 3, rectangular structure on the right of its cross section.The rectangular configuration on the right can be amassed by increasing section, thus makes working oil enter fuel tank faster, makes response become sensitiveer.
In embodiment, two angles on the right side of rectangular configuration are fillet.
In embodiment, spool 2 matches with spring 6, the two ends of spring 6 are respectively arranged with the first spring seat 61 and the second spring seat 62, first spring seat 61 is connected with the valve core rod 21 being provided with spool 2, and the second spring seat 62 is connected with the fixed base 7 be installed on valve body 1.
In embodiment, the center of fixed base 7 is provided with adjusting screw rod 71.The head of adjusting screw rod 71 stretches in valve body 1 through the center of fixed base 7, and offsets with the end of the second spring seat 62 and coordinate, and can be adjusted the lateral displacement of the second spring seat 62 by adjusting screw rod 71.
In embodiment, between fixed base 7 and described valve body 1, be provided with seal ring 72; The setting of seal ring 72 ensure that the sealing of fixed base 7 mounting point.
Working principle:
Hydraulic oil enters valve body 1 from pressure oil port 11, and along with entering of hydraulic oil, pressure increases, and can promote spool 2 and move right.
The moving process of spool 2: during beginning, the left end of spool 2 is mutually concordant with the left end of the first damping hole 4, and the right-hand member of spool 2 is mutually concordant with the left end of the second damping hole 5, and now the first damping hole 4 is all blocked, and the second damping hole 5 all communicates with oil circuit.Along with moving to right of spool 2, first damping hole 4 open amount increases gradually, second damping hole 5 open amount reduces gradually simultaneously, because the width of the first damping hole 4 and the second damping hole 5 is equal, the width of spool 2 equals the distance of the first damping hole 4 left end to the second damping hole 5 left end, therefore, in spool 2 moving process, the opening summation of the first damping hole 4 and the second damping hole 5 remains unchanged.Along with opening of the first damping hole 4, leaking appears in hydraulic oil, and the hydraulic oil of leakage flows into oil circuit through the first damping hole 4, second damping hole 5, finally flows into oil sump tank from return opening 13.Along with the movement of spool 2, leakage rate increases gradually from " 0 ", when the first damping hole 4 open two/for the moment, leakage rate reaches maximum, and now, the second damping hole 5 also opens 1/2nd.Spool 2 continues to move to right, first damping hole 4 open amount continues to increase, second damping hole 5 open amount continues to reduce, due to the reduction of the second damping hole 5 open amount, leakage rate also starts to reduce, until the first damping hole 4 is all opened, and the second damping hole 5 is closed and disconnects with oil circuit, and leakage rate is also decreased to " 0 "; Now, hydraulic oil enters actuator port 12.
In whole process, first damping hole 4 and the second damping hole 5 play damping function, and damping is change, leakage rate is decreased to " 0 " after being increased to maximum value from " 0 " more gradually, adopt the less spool resistance that makes of this damping structure pressure amplitude in whole process to diminish, hydraulic circuit switches freely.
Most preferred embodiment of the present utility model is illustrated, and the various change made by those of ordinary skill in the art or remodeling all can not depart from scope of the present utility model.
Claims (6)
1. one kind has the hydraulic pump control valve of damping structure, include valve body (1) and be installed on the spool (2) in described valve body (1), described valve body (1) is provided with pressure oil port (11), actuator port (12) and return opening (13), it is characterized in that: the both sides described valve body (1) being positioned at middle part oil circuit (3) offer the first damping hole (4) and the second damping hole (5) respectively, described the first damping hole (4) is equal with the width of the second damping hole (5), the width of described spool (2) equals the distance of described first damping hole (4) left end to the second damping hole (5) left end.
2. a kind of hydraulic pump control valve with damping structure according to claim 1, is characterized in that: the left side, the cross section semicircular in shape structure of described middle part oil circuit (3), rectangular structure on the right of its cross section.
3. a kind of hydraulic pump control valve with damping structure according to claim 2, is characterized in that: two angles on the right side of described rectangular configuration are fillet.
4. a kind of hydraulic pump control valve with damping structure according to claim 3, it is characterized in that: described spool (2) matches with spring (6), the two ends of described spring (6) are respectively arranged with the first spring seat (61) and the second spring seat (62), described the first spring seat (61) is connected with the valve core rod (21) being provided with spool (2), and described the second spring seat (62) and the fixed base (7) be installed on valve body (1) are connected.
5. a kind of hydraulic pump control valve with damping structure according to claim 4, is characterized in that: the center of described fixed base (7) is provided with adjusting screw rod (71).
6. a kind of hydraulic pump control valve with damping structure according to claim 5, is characterized in that: be provided with seal ring (72) between described fixed base (7) and described valve body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615911.0U CN204212971U (en) | 2014-10-23 | 2014-10-23 | A kind of hydraulic pump control valve with damping structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420615911.0U CN204212971U (en) | 2014-10-23 | 2014-10-23 | A kind of hydraulic pump control valve with damping structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204212971U true CN204212971U (en) | 2015-03-18 |
Family
ID=52981647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420615911.0U Active CN204212971U (en) | 2014-10-23 | 2014-10-23 | A kind of hydraulic pump control valve with damping structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204212971U (en) |
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2014
- 2014-10-23 CN CN201420615911.0U patent/CN204212971U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |