CN207178279U - The sealing structure of y-type seal ring type with U-shaped back-up ring - Google Patents
The sealing structure of y-type seal ring type with U-shaped back-up ring Download PDFInfo
- Publication number
- CN207178279U CN207178279U CN201720469054.1U CN201720469054U CN207178279U CN 207178279 U CN207178279 U CN 207178279U CN 201720469054 U CN201720469054 U CN 201720469054U CN 207178279 U CN207178279 U CN 207178279U
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- ring
- sealing
- sealing ring
- shaped back
- pump
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Abstract
The sealing structure of y-type seal ring type with U-shaped back-up ring, including sealing ring, the head end of the sealing ring is provided with groove, and outer lip, the epipharynx of its further groove are flared outwardly to create y-type structure, outer lip contacts with pump housing inwall, and epipharynx contacts with the annular mounting groove cell wall of pump core；The afterbody of the sealing ring is embedded in the central through hole of U-shaped back-up ring；The outside of the U-shaped back-up ring is turned down to form side wall to its end face the same side, and the end face of the U-shaped back-up ring is clipped between pump core installation end and sealing ring afterbody, and the side wall of the U-shaped back-up ring is clipped between sealing ring afterbody and pump housing inwall, realizes the two contact sealing.The beneficial effects of the utility model are：When sealing ring is by elevated pressures, its tail end will not have both been squeezed into inside friction gap, will not also overturn deformation, remain to play good sealing function.
Description
Technical field
It the utility model is related to a kind of sealing structure of the y-type seal ring type of the U-shaped back-up ring of band.
Background technology
It is generally only to be sealed using common sealing ring between the pump core and the pump housing of existing hydraulic oil pump, works as oil pocket
When interior oil pressure is high, sealing ring can be caused, which to be pressurized, excessively to be caused to deform, and the tail end of sealing ring, which can be squeezed between pump core and the pump housing, to be produced
In raw friction gap, so as to influence the sealing effectiveness of the two, cause oil leak.
The content of the invention
In order to solve the problems, such as the easy oil leak of current hydraulic oil pump, the utility model proposes it is a kind of will not oil leak band U
The sealing structure of the y-type seal ring type of type back-up ring.
The sealing structure of the y-type seal ring type of the U-shaped back-up ring of band described in the utility model, including sealing ring, hydraulic pump
Pump housing bottom and valve body are affixed, and pump housing inner chamber is equipped with the pump core being slidably matched therewith, between the sealed end of pump core and pump housing inner chamber
Gap to accommodate the oil pocket of hydraulic oil, the sealing ring coaxial sleeve seals in the annular mounting groove of pump core sealed end
The outer wall of circle is interference fitted with pump housing inwall, realizes the sealing of the sealed end and the pump housing of pump core；The first end face of the sealing ring
Contacted with the hydraulic pressure oil meter face in the pump housing, it is characterised in that：The head end of the sealing ring is provided with groove, its further groove
Outer lip, epipharynx are flared outwardly to create y-type structure, and outer lip contacts with pump housing inwall, the annular mounting groove cell wall of epipharynx and pump core
Contact；The afterbody of the sealing ring is embedded in the central through hole of U-shaped back-up ring；The outside of the U-shaped back-up ring is to its end face the same side
Turnover forms side wall, and the end face of the U-shaped back-up ring is clipped between pump core installation end and sealing ring afterbody, the side of the U-shaped back-up ring
Wall is clipped between sealing ring afterbody and pump housing inwall, realizes the two contact sealing.
The afterbody outer wall of the sealing ring is circumferentially with the annular slot for being inserted in U-shaped back-up ring, and annular slot prolongs
Extend at the tail end face of sealing ring.
The groove is V-groove.
Operation principle：Region between valve body, the pump housing and pump core is full of hydraulic oil.When pump core is by downward external force, and
Move downward, extrude hydraulic oil, make hydraulic oil internal pressure rise, and from make pump core bottom carry U-shaped back-up ring sealing ring
Acted on by the pressure of hydraulic oil, the interior outer lip of y-type seal ring is opened, and be adjacent to completely with pump housing inwall, eliminate pump core and
Friction gap between the pump housing, so as to play sealing function.U-shaped back-up ring and sealing are mounted with successively in pump core sealed end
Circle.Because sealing ring is embedded in the higher U-shaped back-up ring of intensity, when sealing ring is by elevated pressures, its tail end is neither
It can squeeze into inside friction gap, will not also overturn deformation, remain to play good sealing function.
The beneficial effects of the utility model are：When sealing ring is by elevated pressures, its tail end will not both squeeze into friction
Inside gap, deformation will not be also overturn, remains to play good sealing function.
Brief description of the drawings
Fig. 1 is the front view of sealing ring of the present utility model.
Fig. 2 is the top view of sealing ring of the present utility model.
Fig. 3 is that (A represents pump core rise direction to use state figure of the present utility model；B represents pump core compression direction).
Embodiment
The utility model is further illustrated below in conjunction with the accompanying drawings
Referring to the drawings：
The sealing structure of the y-type seal ring type of the U-shaped back-up ring of band described in the utility model of embodiment 1, including sealing ring 1,
The bottom of the pump housing 4 of hydraulic pump and valve body 3 are affixed, and the inner chamber of the pump housing 4 is equipped with the pump core 5 that is slidably matched therewith, the sealed end of pump core 5 with
To accommodate the oil pocket of hydraulic oil 7, the coaxial sleeve of sealing ring 1 is pacified in the annular of the sealed end of pump core 5 in gap between the inner chamber of the pump housing 4
In tankage, and the outer wall of sealing ring 1 is interference fitted with the inwall of the pump housing 4, realizes the sealed end of pump core 5 and the sealing of the pump housing 4；Institute
The first end face for stating sealing ring 1 contacts with the hydraulic pressure oil meter face in the pump housing 4, and the head end of the sealing ring 1 is provided with groove
11, outer lip 12, the epipharynx 13 of its further groove 11 are flared outwardly to create y-type structure, and outer lip 12 contacts with the inwall of the pump housing 4, epipharynx
13 contact with the annular mounting groove cell wall of pump core 5；The afterbody of the sealing ring 1 is embedded in the central through hole of U-shaped back-up ring 2；The U
The outside of type back-up ring 2 turns down to form side wall to its end face the same side, the end face of the U-shaped back-up ring 2 be clipped in the installation end of pump core 5 with it is close
Between seal afterbody, the side wall of the U-shaped back-up ring 2 is clipped between sealing ring afterbody and pump housing inwall, realizes the two contact sealing.
The afterbody outer wall of the sealing ring 1 is circumferentially with the annular slot 14 for being inserted in U-shaped back-up ring, and annular slot
14 extend at the tail end face of sealing ring 1.
The groove 11 is V-groove.
Operation principle：Region between valve body 3, the pump housing 4 and pump core 5 is full of hydraulic oil 7.When pump core 5 is by downward outer
Power, and moving downward, hydraulic oil 7 is extruded, the internal pressure of hydraulic oil 7 is increased, and from the bottom of pump core 5 is made with U-shaped back-up ring 2
Sealing ring 1 acted on by the pressure of hydraulic oil 7, open the interior outer lip of sealing ring 1, and be adjacent to completely with the inwall of the pump housing 4, disappear
Except the friction gap 6 between pump core 5 and the pump housing 4, so as to play sealing function.It is mounted with successively in the sealed end of pump core 5 U-shaped
Back-up ring 2 and sealing ring 1.Because sealing ring 1 is embedded in the higher U-shaped back-up ring 2 of intensity, when sealing ring 1 is by elevated pressures
When, its tail end will not both squeeze into the inside of friction gap 6, will not also overturn deformation, remain to play good sealing function.
Content described in this specification embodiment is only enumerating to the way of realization of utility model design, and this practicality is new
The protection domain of type is not construed as being only limitted to the concrete form that embodiment is stated, the scope of protection of the utility model is also wrapped
Include those skilled in the art according to the utility model design it is conceivable that equivalent technologies mean.
Claims (3)
1. the sealing structure of the y-type seal ring type with U-shaped back-up ring, including sealing ring, the pump housing bottom of hydraulic pump and valve body are affixed,
Pump housing inner chamber is equipped with the pump core being slidably matched therewith, and the gap between the sealed end of pump core and pump housing inner chamber is receiving hydraulic oil
Oil pocket, the sealing ring coaxial sleeve is in the annular mounting groove of pump core sealed end, and the outer wall of sealing ring and pump housing inwall mistake
It is full of cooperation, realizes the sealing of the sealed end and the pump housing of pump core；Hydraulic pressure oil meter face in the first end face and the pump housing of the sealing ring
Contact, it is characterised in that：The head end of the sealing ring is provided with groove, and outer lip, the epipharynx of its further groove are flared out
Y-type structure is formed, outer lip contacts with pump housing inwall, and epipharynx contacts with the annular mounting groove cell wall of pump core；The tail of the sealing ring
Portion is embedded in the central through hole of U-shaped back-up ring；The outside of the U-shaped back-up ring turns down to form side wall to its end face the same side, described U-shaped
The end face of back-up ring is clipped between pump core installation end and sealing ring afterbody, and the side wall of the U-shaped back-up ring is clipped in sealing ring afterbody and pump
Between internal wall, the two contact sealing is realized.
2. the sealing structure of the y-type seal ring type with U-shaped back-up ring as claimed in claim 1, it is characterised in that：The sealing ring
Afterbody outer wall be circumferentially with annular slot for being inserted in U-shaped back-up ring, and annular slot extends to the aft end of sealing ring
At face.
3. the sealing structure of the y-type seal ring type with U-shaped back-up ring as claimed in claim 1, it is characterised in that：The groove is
V-groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720469054.1U CN207178279U (en) | 2017-04-28 | 2017-04-28 | The sealing structure of y-type seal ring type with U-shaped back-up ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720469054.1U CN207178279U (en) | 2017-04-28 | 2017-04-28 | The sealing structure of y-type seal ring type with U-shaped back-up ring |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207178279U true CN207178279U (en) | 2018-04-03 |
Family
ID=61732638
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720469054.1U Active CN207178279U (en) | 2017-04-28 | 2017-04-28 | The sealing structure of y-type seal ring type with U-shaped back-up ring |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207178279U (en) |
-
2017
- 2017-04-28 CN CN201720469054.1U patent/CN207178279U/en active Active
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| GR01 | Patent grant |