CN102312878A - Hydraulic reducing valve - Google Patents
Hydraulic reducing valve Download PDFInfo
- Publication number
- CN102312878A CN102312878A CN201110283857A CN201110283857A CN102312878A CN 102312878 A CN102312878 A CN 102312878A CN 201110283857 A CN201110283857 A CN 201110283857A CN 201110283857 A CN201110283857 A CN 201110283857A CN 102312878 A CN102312878 A CN 102312878A
- Authority
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- China
- Prior art keywords
- oil
- valve seat
- oil inlet
- communicated
- spool
- 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.)
- Granted
Links
- 239000003921 oil Substances 0.000 claims abstract description 78
- 238000004891 communication Methods 0.000 claims abstract description 6
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 5
- 239000000945 filler Substances 0.000 claims description 8
- 230000009467 reduction Effects 0.000 claims description 8
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000006837 decompression Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
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Abstract
A hydraulic reducing valve comprises a valve seat with an end cover at the top end, wherein an oil inlet channel is arranged in the valve seat, the lower end of the oil inlet channel is an oil inlet which is positioned at the high pressure side of the lower end of the valve seat, the upper end opening of the oil inlet channel is communicated with a control oil cavity, and the bore of the control oil cavity is larger than that of the oil inlet channel; one side of the upper end of the oil inlet channel is provided with an oil outlet channel to be communicated with an oil outlet of the low pressure side which is positioned at one side of the valve seat, and the oil outlet channel is communicated with the control oil cavity through a communication channel; and a concave valve plug with a large diameter at the upper part and a small diameter at the lower part is arranged in the valve seat, when the self weight of the concave valve plug is larger than the upwards pushing force of the hydraulic oil on the valve plug, the valve plug upper part with the large diameter is positioned in the control oil cavity, the lower part with the small diameter is positioned at the upper part of the oil inlet channel and seals the oil outlet channel. The hydraulic reducing valve provided by the invention has the advantages of accurate variable pressure, long service life, simple structure, safety, reliability, no regulation and the like.
Description
Technical field
The present invention relates to a kind of hydraulic pressure reducing device, belong to the hydraulics field, for high oil pressure decompression is the element of low oil pressure.
Background technique
At the widely used reduction valve of Hydraulic Field, owing to adopting spring-loaded plunger or spring diaphragm structure, it has poor repeatability, and the shortcoming that operating life is short, leakage rate is big is needed improvement badly.
Summary of the invention
The technical problem that the present invention will solve is, the defective to existing technology exists proposes a kind of hydraulic pressure reduction valve, have transformation accurately, long working life, simple in structure, safe and reliable, need not advantage such as adjusting.
Technological scheme of the present invention is; Said hydraulic pressure reduction valve comprises that there is the valve seat of end cap on the top; Its structural feature is, is provided with oil inlet passage in the valve seat, and the lower end of this oil inlet passage is the high pressure side filler opening that is positioned at the valve seat lower end; The upper end-hole of oil inlet passage is communicated with the control oil pocket, and the aperture of control oil pocket is greater than the aperture of oil inlet passage; Oil inlet passage upper end one side has oil discharge passage to be communicated to be positioned at the low voltage side oil outlet of valve seat one side, and said oil discharge passage is communicated with the control oil pocket through communication passage; The big and less convex spool of lower diameter of upper diameter is arranged in the valve seat; And when the convex spool when deadweight receives the thrust that hydraulic oil makes progress greater than this spool; The bigger top of this valve core diameter is positioned at the control oil pocket, and the less bottom of diameter is positioned at oil inlet passage top and said oil discharge passage is sealed.
Below the utility model made further specify.
The working procedure of the utility model is (referring to Fig. 1); When high pressure side filler opening 4 is connected with high pressure oil; The force convex spool 3 that acts on convex spool 3 lower end surfaces 12 moves up, and this moment, low voltage side oil outlet 6 was communicated with high pressure side filler opening 4, and pressure oil gets into low voltage side oil outlet 6; Simultaneously; Low-pressure lateral pressure oil gets into the upper-end surface 13 of controlling oil pocket 9 and acting on convex spool 3 through communication passage 7; 13 produce pressure in the upper-end surface, because the area of upper-end surface 13 is than the area of lower end surface 12 big (because of convex spool 2 has the structure of the less bottom 10 of bigger top of diameter 11 and diameter, referring to Fig. 2); The hydraulic oil of same big pressure in the power that produces on the upper-end surface 13 greater than the active force on the lower end surface 12; Move down so promote convex spool 3, cover in the oil discharge passage that is communicated with low voltage side oil outlet 6 up to convex spool 3, convex spool 3 stops to move at this moment; The pressure oil of high pressure side filler opening 4 can not get into low voltage side oil outlet 6, has realized the decompression of pressure oil.The upper-end surface 13 of choose reasonable convex spool 3 and the suitable area ratio of lower end surface 12 just can be realized the decompression of different pressures grade.
Know-why of the present invention is; Adopt the convex spool to realize the change level transmission of pressure; Can recently realize the minification of incoming pressure through the different area of design convex spool both ends of the surface, produce pilot pressure at the large end face of convex spool, compare at the pressure that the small end face of convex spool produces with high pressure side filler opening pressure oil from the control chamber pressure oil of low voltage side oil outlet; Realize the transient equiliblium of spool through moving up and down of spool, keep delivery pressure within allowed band.
Know that by above the present invention is a kind of hydraulic pressure reduction valve, have transformation accurately, long working life, simple in structure, safe and reliable, need not advantage such as adjusting.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the present invention;
Fig. 2 is the structural representation of convex spool among Fig. 1;
Fig. 3 is the structural representation of valve seat among Fig. 1.
In the drawings:
1-end cap 1, the 2-valve seat, 3-convex spool,
4-high pressure side filler opening 4, the 5-flow-off, 6-low voltage side oil outlet 6,
The 7-communication passage, the 8-oil inlet passage, 9-controls oil pocket,
The bottom that the 10-diameter is less, the top that the 11-diameter is bigger, the 12-lower end surface,
The 13-upper-end surface.
Embodiment
Extremely shown in Figure 3 like Fig. 1; Said hydraulic pressure reduction valve comprises that there is the valve seat 2 of end cap 1 on the top; Be provided with oil inlet passage 8 in the valve seat 2; The lower end of this oil inlet passage 8 is the high pressure side filler openings 4 that are positioned at valve seat 2 lower ends, and the upper end-hole of oil inlet passage 8 is communicated with control oil pocket 9, and the aperture (diameter) of control oil pocket 9 is greater than the aperture (diameter) of oil inlet passage 8; Oil inlet passage 8 upper ends one side has oil discharge passage to be communicated to be positioned at the low voltage side oil outlet 6 of valve seat 2 one sides, and said oil discharge passage is communicated with control oil pockets 9 through communication passage 7; The big and less convex spool 3 of lower diameter of upper diameter is arranged in the valve seat 2; And when convex spool 3 when deadweight receives the thrust that hydraulic oil makes progress greater than this spool 2; The top 11 that these spool 2 diameters are bigger is positioned at control oil pocket 9, and the less bottom 10 of diameter is positioned at oil inlet passage 8 tops and said oil discharge passage is sealed.
Also be provided with the flow-off 5 that is communicated with said oil discharge passage in the said valve seat 2.
Claims (2)
1. hydraulic pressure reduction valve; Comprise that there is the valve seat (2) of end cap (1) on the top; It is characterized in that, be provided with oil inlet passage (8) in the valve seat (2), the lower end of this oil inlet passage (8) is the high pressure side filler opening (4) that is positioned at valve seat (2) lower end; The upper end-hole of oil inlet passage (8) is communicated with control oil pocket (9), and the aperture of control oil pocket (9) is greater than the aperture of oil inlet passage (8); Oil inlet passage (8) upper end one side has oil discharge passage to be communicated to be positioned at the low voltage side oil outlet (6) of valve seat (2) one sides, and said oil discharge passage is communicated with control oil pocket (9) through communication passage (7); The big and less convex spool (3) of lower diameter of upper diameter is arranged in the valve seat (2); And when convex spool (3) when deadweight receives the thrust that hydraulic oil makes progress greater than this spool (2); The top (11) that this spool (2) diameter is bigger is positioned at control oil pocket (9), and the less bottom (10) of diameter is positioned at oil inlet passage (8) top and said oil discharge passage is sealed.
2. according to the said hydraulic pressure reduction valve of claim 1, it is characterized in that, also be provided with the flow-off (5) that is communicated with said oil discharge passage in the said valve seat (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110283857 CN102312878B (en) | 2011-09-22 | 2011-09-22 | Hydraulic reducing valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110283857 CN102312878B (en) | 2011-09-22 | 2011-09-22 | Hydraulic reducing valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102312878A true CN102312878A (en) | 2012-01-11 |
| CN102312878B CN102312878B (en) | 2013-09-18 |
Family
ID=45426336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110283857 Expired - Fee Related CN102312878B (en) | 2011-09-22 | 2011-09-22 | Hydraulic reducing valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102312878B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO104119B1 (en) * | 1989-10-20 | 1993-12-15 | Inst Cercetari Stiintifice | Proportional pressure reducer |
| CN1122885A (en) * | 1994-11-05 | 1996-05-22 | 林茂森 | Adjustable pressure reduction valve |
| CN2347029Y (en) * | 1998-09-22 | 1999-11-03 | 王立朝 | Pressure reducing valve |
| JP3058841B2 (en) * | 1997-03-03 | 2000-07-04 | 株式会社コーアツ | Decompression device |
| CN202228454U (en) * | 2011-09-22 | 2012-05-23 | 华自科技股份有限公司 | Hydraulic relief valve |
-
2011
- 2011-09-22 CN CN 201110283857 patent/CN102312878B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RO104119B1 (en) * | 1989-10-20 | 1993-12-15 | Inst Cercetari Stiintifice | Proportional pressure reducer |
| CN1122885A (en) * | 1994-11-05 | 1996-05-22 | 林茂森 | Adjustable pressure reduction valve |
| JP3058841B2 (en) * | 1997-03-03 | 2000-07-04 | 株式会社コーアツ | Decompression device |
| CN2347029Y (en) * | 1998-09-22 | 1999-11-03 | 王立朝 | Pressure reducing valve |
| CN202228454U (en) * | 2011-09-22 | 2012-05-23 | 华自科技股份有限公司 | Hydraulic relief valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102312878B (en) | 2013-09-18 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 |