CN203463277U - Leak-proof sealing structure - Google Patents
Leak-proof sealing structure Download PDFInfo
- Publication number
- CN203463277U CN203463277U CN201320518108.0U CN201320518108U CN203463277U CN 203463277 U CN203463277 U CN 203463277U CN 201320518108 U CN201320518108 U CN 201320518108U CN 203463277 U CN203463277 U CN 203463277U
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- CN
- China
- Prior art keywords
- plunger
- leak
- valve body
- annular groove
- sealing structure
- 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
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Abstract
The utility model discloses a leak-proof sealing structure, and relates to a leak-proof sealing structure for a high-pressure pump. The leak-proof sealing structure comprises a valve body, wherein an exchange cavity is formed in the valve body; a plunger moving in a reciprocating way is arranged in the exchange cavity; a high-pressure water seal and a sealing ring base are sleeved on the plunger; the high-pressure water seal and the sealing ring base are fixedly arranged on the valve body; the sealing ring base is provided with an annular groove; an O-shaped ring is arranged in the annular groove; the O-shaped ring is tightly jointed with the plunger; the sealing ring base is fixedly connected with a retainer ring. Compared with the prior art, the leak-proof sealing structure has the advantages of low cost and capability of preventing a plunger pump from leaking water while working.
Description
Technical field
The utility model relates to a kind of high-pressure service pump leak tight seal, is specially a kind of leakage-proof structure for high-pressure plunger pump.
Background technique
Traditional plunger pump comprises outlet valve of an inlet valve, and with the inverting chamber being connected with them, in inverting chamber, be provided with the plunger moving reciprocatingly, when inverting chamber motion is left by plunger court, in inverting chamber, be negative pressure state, now outlet valve is closed, and inlet valve is opened, and the low-pressure water of admission chamber is sucked in inverting chamber by inlet valve; When plunger court enters inverting chamber motion, in inverting chamber, be high pressure conditions, now inlet valve is closed, and outlet valve is opened, and the high pressure water in inverting chamber is pressed into hyperbaric chamber by outlet valve.Completed like this one and water has been uprised to the complete cycle of pressure by low pressure.
Because plunger can form high pressure to the extruding of water, therefore the sealing between plunger and inverting chamber has determined the effect of high pressure, for the sealing improving between plunger and inverting chamber generally can be installed seal ring between plunger and inverting chamber, in the reciprocating process of plunger, can find out that time that sealing circle has half is in high pressure conditions, it is subject to the squeezing action of high pressure water, and plunger surface is produced to very large enclasping force, due to the motion of plunger reciprocal straight line motion still not, but also can rotatablely move and slight swing, therefore at plunger surface and seal ring junction, have all the time a small amount of seepage, these water likely stockpile at the opposite side of inverting chamber, and may drain to pump housing outside.
Plunger pump adopts the two water-seal sealing structures of high low pressure or single high pressure water seal list sealing configuration now.These two kinds of structures are found broad application in plunger pump.But the design of double sealing structure is to other structural requirement more complicated of plunger pump, therefore cost is higher than single sealing configuration.A lot of manufacturers, for obtaining the market share, take single sealing configuration cheaply by reducing quality requirement.And take single sealing configuration often to there will be the situation of leaking.
Summary of the invention
The utility model is for deficiency of the prior art, but a kind of leak tight seal of leaking can prevent plunger pump work time with low cost is provided.
In order to solve the problems of the technologies described above, the utility model is solved by following technical proposals: a kind of leak tight seal, comprise valve body, in described valve body, be provided with inverting chamber, in described inverting chamber, be provided with the plunger moving reciprocatingly, on described plunger, be arranged with high pressure water seal and packing holder, described high pressure water seal and described packing holder are fixedly installed on described valve body, on described packing holder, be provided with annular groove, in described annular groove, be provided with O shape circle, described O shape circle is closely fitted with described plunger, on described packing holder, be fixedly connected with back-up ring.Arrange like this, the utility model has adopted two seals, has improved the reliability of sealing on this double sealing structure.Use the O shape circle that price is cheap to replace low pressure water seal simultaneously, reduced the cost of whole device.
In technique scheme, preferred, in described annular groove, be coated with lubricant grease.Arrange like this, in annular groove, be coated with lubricant grease and can reduce the friction between O shape circle and plunger, strengthen lubricity, reduce the rate of wear of O shape circle, improve sealing working life.Molecular surface length tension relation according to oil with water, appropriate lubricant oil can also play anti-sealing in sealing place and leak with the form of moisture film.
Compared with prior art, the beneficial effects of the utility model are: but a kind of leak tight seal that can prevent that plunger pump from leaking while working with low cost is provided.
Accompanying drawing explanation
Fig. 1 is the utility model cross-sectional schematic.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Shown in Figure 1, a kind of leak tight seal, comprises valve body 1, in described valve body 1, is provided with inverting chamber 2, is provided with the plunger 3 moving reciprocatingly in described inverting chamber 2.On plunger 3, be arranged with high pressure water seal 4 and packing holder 5, high pressure water seal 4 and packing holder 5 are fixedly installed on valve body 1.On packing holder 5, be provided with annular groove 6, in annular groove 6, be coated with lubricant grease, in annular groove 6, be provided with O shape circle 7, O shape circle 7 and be closely fitted with plunger 3, on packing holder 5, be fixedly connected with back-up ring 8.Back-up ring 8 is limited in O shape circle 7 in annular groove 6.
Because the service condition of O shape circle 7 is the motive sealings under static seal or low speed.The service condition of motive sealing is linear velocity≤0.5m/s.And the general reciprocating linear velocity of plunger 3 is 1m/s ~ 3m/s, considerably beyond O shape, enclose the service condition of 7 motive sealings.O shape circle 7 is used under this condition, need not how long will be damaged inefficacy by mutual friction.The utility model, at the interior coating lubricating oil fat of annular groove 6, has reduced friction, enhancing lubricity between O shape circle 7 and plunger 3, reduces the rate of wear of O shape circle 7, the working life of improving O shape circle 7.According to the molecular surface length tension relation of oil and water, appropriate lubricant oil can also play anti-sealing in sealing place and leak with the form of moisture film simultaneously.
Claims (2)
1. a leak tight seal, comprise valve body (1), in described valve body (1), be provided with inverting chamber (2), in described inverting chamber (2), be provided with the plunger (3) moving reciprocatingly, it is characterized by, on described plunger (3), be arranged with high pressure water seal (4) and packing holder (5), described high pressure water seal (4) and described packing holder (5) are fixedly installed on described valve body (1), on described packing holder (5), be provided with annular groove (6), in described annular groove (6), be provided with O shape circle (7), described O shape circle (7) is closely fitted with described plunger (3), on described packing holder (5), be fixedly connected with back-up ring (8).
2. a kind of leak tight seal according to claim 1, described annular groove is coated with lubricant grease in (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320518108.0U CN203463277U (en) | 2013-08-23 | 2013-08-23 | Leak-proof sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320518108.0U CN203463277U (en) | 2013-08-23 | 2013-08-23 | Leak-proof sealing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203463277U true CN203463277U (en) | 2014-03-05 |
Family
ID=50175646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320518108.0U Expired - Fee Related CN203463277U (en) | 2013-08-23 | 2013-08-23 | Leak-proof sealing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203463277U (en) |
-
2013
- 2013-08-23 CN CN201320518108.0U patent/CN203463277U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20140305 Termination date: 20180823 |