CN214887626U - Plunger pump hydraulic end sealing structure - Google Patents
Plunger pump hydraulic end sealing structure Download PDFInfo
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- CN214887626U CN214887626U CN202120364493.2U CN202120364493U CN214887626U CN 214887626 U CN214887626 U CN 214887626U CN 202120364493 U CN202120364493 U CN 202120364493U CN 214887626 U CN214887626 U CN 214887626U
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- valve box
- sealing
- plunger pump
- gland
- fluid end
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Abstract
The utility model discloses a plunger pump hydraulic end seal structure, including hydraulic end valve box, gland, sealing washer and retaining ring, the inside valve box cavity that has of hydraulic end valve box, be equipped with sealed hole on the hydraulic end valve box, the gland sets up in the sealed hole, the periphery of gland is equipped with the recess, the sealing washer with the retaining ring sets up in the recess, the sealing washer sets up being close to of recess one side of valve box cavity, the retaining ring sets up keeping away from of recess one side of valve box cavity, the sealing washer is star type sealing washer. Adopt the utility model discloses star type sealing washer has a plurality of seal lips, can form the multiple seal, and is sealed effectual, is difficult for twisting reverse at the operation in-process, can store lubricating oil between the seal lip, can reduce the friction between sealing washer and hydraulic end valve box and sealing washer and the gland, in reciprocating motion's operation, has alleviateed the wearing and tearing of hydraulic end valve box and gland, has promoted seal structure's life.
Description
Technical Field
The utility model relates to a plunger pump seals the field, especially relates to a plunger pump hydraulic pressure end seal structure.
Background
In the oil and gas field exploitation equipment industry, a traditional plunger pump hydraulic end sealing structure is generally an O-shaped sealing ring arranged between a hydraulic end valve box and a gland. Along with the fracturing operation well depth of scene is more and more dark, the exploitation degree of difficulty is also more and more difficult, the operating pressure of exploitation equipment is also more and more high, traditional plunger pump hydraulic end seal structure is under complicated fracturing operation operating mode, the O type sealing washer sealed effect variation, the O type sealing washer twists reverse for hydraulic end valve box and gland easily in the operation process, cause sealed failure, short service life, change cycle is short, and under the quick high-low pressure alternating load effect in the valve box cavity, the wriggling phenomenon can appear in the O type sealing washer, can lead to the fact the friction between hydraulic end valve box and the gland, can lead to the fact wearing and tearing and cave in hydraulic end valve box and gland, lead to the fact sealed inefficacy and hydraulic end valve box and the scrapping of gland.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a plunger pump fluid end seal structure to solve among the current seal structure sealed effect poor, easily cause fluid end valve case and gland wearing and tearing, and the sealing washer twists reverse easily, problem that life is short.
In order to solve the above problem, the utility model adopts the following technical scheme:
the utility model provides a plunger pump fluid end seal structure, includes fluid end valve box, gland, sealing washer and retaining ring, fluid end valve box is inside to have the valve box cavity, be equipped with the sealed hole on the fluid end valve box, the gland sets up in the sealed hole, the periphery of gland is equipped with the recess, the sealing washer with the retaining ring sets up in the recess, the sealing washer sets up being close to of recess one side of valve box cavity, the retaining ring sets up keeping away from of recess one side of valve box cavity, the sealing washer is star type sealing washer.
The gland has the central axis, the recess includes notch and tank bottom, the notch for the tank bottom is kept away from the central axis, star type sealing washer includes the orientation the inboard of tank bottom and orientation the outside of fluid end valve case, the tank bottom with inboard interference fit, the outside with fluid end valve case interference fit.
The inboard is equipped with two at least seal lips, the recess with seal lip interference fit.
The outside is equipped with two at least seal lips, the seal lip with hydraulic end valve case interference fit.
And the ratio of the axial dimension to the radial dimension of the sealing ring after interference fit is 1.05-1.55.
The ratio of the radial dimension of the sealing ring after the interference fit to the radial dimension of the sealing ring before the interference fit is 0.75-0.95.
The single-side interference magnitude of the interference fit is 0.15-2.5 mm.
At least two adjacent sealing lips have a recess for accommodating lubricating oil therebetween.
The retaining ring comprises an inner ring facing the groove bottom and an outer ring facing the hydraulic end valve box, the inner ring is in contact fit with the groove bottom, and the outer ring is in contact fit with the hydraulic end valve box.
The number of the check rings is one or more.
The inner diameter of the star-shaped sealing ring is 80-160 mm, the outer diameter of the star-shaped sealing ring is 83-180 mm, and the width of the star-shaped sealing ring is 1.5-10 mm.
The hydraulic end valve box is characterized by further comprising a pressing cap, wherein the pressing cap is matched with the pressing cover, and the pressing cap is fixedly connected with the hydraulic end valve box.
The utility model discloses a technical scheme can reach following beneficial effect:
adopt the utility model discloses a plunger pump fluid end seal structure, the sealing washer is star type sealing washer, star type sealing washer has a plurality of seal lips, can form the multiple seal, and is sealed effectual, is difficult for twisting reverse at the operation in-process, can store lubricating oil between the seal lip, can reduce the friction between sealing washer and fluid end valve box and sealing washer and the gland, in plunger pump reciprocating motion's operation, has alleviateed the wearing and tearing of fluid end valve box and gland, has promoted seal structure's life.
Drawings
The accompanying drawings, which are described herein, serve to provide a further understanding of the invention and constitute a part of this specification, and the exemplary embodiments and descriptions thereof are provided for explaining the invention without unduly limiting it. In the drawings:
fig. 1 is a schematic structural view of a plunger pump according to the present invention;
fig. 2 is a schematic structural view of the sealing structure of the middle hydraulic end valve box of the present invention;
fig. 3 is an enlarged view of the middle seal structure of the present invention;
fig. 4 is a cross-sectional view of the star-shaped seal ring of the present invention.
Description of reference numerals:
10 hydraulic end valve box
11 sealing hole
20 pressing cover
21 groove
30 sealing ring
31 first sealing lip
32 second sealing lip
33 third sealing lip
34 fourth sealing lip
35 concave part
40 retainer ring
50 valve box cavity
60 pressing cap
70 plunger
80 suction end
90 discharge end
Detailed Description
To make the purpose, technical solution and advantages of the present invention clearer, the following will combine the embodiments of the present invention and the corresponding drawings to clearly and completely describe the technical solution of the present invention. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The technical solutions disclosed in the embodiments of the present invention are described in detail below with reference to the accompanying drawings.
As shown in fig. 1-4, the utility model provides a plunger pump fluid end seal structure, this plunger pump fluid end seal structure includes fluid end valve box 10, gland 20, sealing washer and retaining ring 40, the sealing washer sets up between gland 20 and fluid end valve box 10, seal between gland 20 and the fluid end valve box 10, fluid end valve box 10 is inside to have valve box cavity 50, be equipped with sealed hole 11 on the fluid end valve box 10, gland 20 sets up in sealed hole 11, gland 20's periphery is equipped with recess 21, sealing washer and retaining ring 40 set up in recess 21, the sealing washer sets up in one side that is close to valve box cavity 50 of recess 21, retaining ring 40 sets up in one side of keeping away from valve box cavity 50 of recess 21, the sealing washer is star type sealing washer 30.
As shown in fig. 1 and 2, when the plunger pump works, when the plunger moves to the left, liquid enters the valve box cavity 50 from the suction end 80, the pressure in the cavity is low at this time, the sealing ring moves to the left at this time, when the plunger moves to the right, the liquid is squeezed and discharged from the discharge end 90, the pressure is high, for example, 90MPa can be reached, the sealing ring moves to the right, the whole process is very fast, the sealing ring moves rapidly and continuously, if the friction between the sealing ring and the hydraulic end valve box 10 and the gland 20 is large, in the working process, the three components all cause abrasion, a recess is generated on the sealing surface of the hydraulic end valve box 10 over time, the recess 21 of the gland 20 also causes abrasion, and the three components are rejected due to the fact that the three components cannot be sealed.
Adopt the utility model discloses a plunger pump fluid end seal structure, the sealing washer is star type sealing washer 30, star type sealing washer 30 has a plurality of seal lips, can form the multiple seal, it is sealed effectual, difficult torsion in the operation process, can store lubricating oil between the seal lip, can reduce the friction between sealing washer and fluid end valve case 10 and sealing washer and gland 20, in plunger pump reciprocating motion's operation, the wearing and tearing of fluid end valve case 10 and gland 20 have been alleviateed, seal structure's life has been promoted.
The utility model discloses do not do the injecing to the shape of seal hole 11 and gland 20, seal hole 11 and gland 20 can be arbitrary shape, the embodiment of the utility model provides an use circularly to explain as the example, seal hole 11 is the round hole, gland 20 is the cylinder that corresponds, gland 20 has the central axis, recess 21 is the annular groove 21 of gland 20's periphery, recess 21 includes notch and tank bottom, the central axis is kept away from for the tank bottom to the notch, star type sealing washer 30 includes the inboard of orientation tank bottom and the outside of orientation fluid end valve case 10, tank bottom and inboard interference fit, outside and fluid end valve case 10 interference fit. The interference fit enables the matched groove bottom and the inner side and the outer side of the groove bottom to be extruded with the hydraulic end valve box 10, and the star-shaped sealing ring 30 forms good sealing with the hydraulic end valve box 10 and the groove bottom after being extruded.
At least two sealing lips are arranged on the inner side of the star-shaped sealing ring 30, and the groove 21 is in interference fit with the sealing lips. The outside is equipped with two at least seal lips, and seal lip and hydraulic end valve case 10 interference fit. As shown in the figure, the section of the star-shaped sealing ring 30 is star-shaped or X-shaped, as shown in fig. 3 and 4, the outer side of the star-shaped sealing ring 30 is provided with two sealing lips, namely a third sealing lip 33 and a fourth sealing lip 34, which can be matched with the hydraulic end valve box 10 to form two seals, the inner side of the star-shaped sealing ring 30 is provided with two sealing lips, namely a first sealing lip 31 and a second sealing lip 32, which can form two seals with the bottom of the groove 21, so that the sealing effect is improved, and the star-shaped or X-shaped sealing ring can prevent the sealing ring from twisting in the groove 21 in the operation process.
The sealing ring is assembled in the groove and is in interference fit with the groove bottom of the groove 21 and the hydraulic end valve box 10 respectively, the assembled sealing ring is extruded, the ratio of the axial size to the radial size of the sealing ring after the interference fit is 1.05-1.55, the ratio of the radial size to the radial size of the sealing ring after the interference fit is 0.75-0.95, the sealing effect is guaranteed, and the service life of the sealing ring is optimized.
In order to ensure the sealing effect and avoid the damage of the excessive extrusion force to the sealing ring, the single-side interference magnitude of the interference fit in the embodiment is 0.15 mm-2.5 mm.
In an embodiment of the present invention, a concave portion for accommodating lubricating oil is provided between adjacent sealing lips of at least two sealing lips. In the embodiment, the two sealing lips are arranged on the inner side, the concave part is arranged between the two sealing lips on the inner side, the lubricating oil can be contained in the concave part, the friction between the sealing ring and the groove bottom can be reduced, when the sealing ring moves in the groove bottom, the sealing ring and the groove bottom can not be abraded, the two sealing lips are arranged on the outer side, the concave part is arranged between the two sealing lips on the outer side, the lubricating oil can be contained in the concave part, the friction between the sealing ring and the hydraulic end valve box 10 can be reduced, when the sealing ring moves relative to the hydraulic end valve box 10, the sealing ring and the hydraulic end valve box 10 can not be abraded,
the utility model discloses in for protecting the sealing washer, set up retaining ring 40 in one side of sealing washer, the sealing washer sets up the one side that is close to valve box cavity 50 at recess 21, retaining ring 40 sets up the one side of keeping away from valve box cavity 50 at recess 21, when the too big extrusion seal of pressure inside valve box cavity 50, retaining ring 40 can play the effect of support to the sealing washer at the opposite side, retaining ring 40 includes the inner circle towards the tank bottom and the outer lane towards hydraulic end valve box 10, the inner circle is contacted with the tank bottom and is cooperated, the outer lane is contacted and is cooperated with hydraulic end valve box 10, on the one hand, there is the clearance between hydraulic end valve box 10 and the gland 20, retaining ring 40 can be covered with the clearance between gland 20 and the hydraulic end valve box 10, play fine supporting role to the sealing washer, avoid the sealing washer to be highly extruded to cause the damage to the sealing washer in the clearance between hydraulic end valve box 10 and the gland 20; on the other hand, the retainer ring 40 can occupy part of the axial space of the groove 21, reducing the distance that the seal ring moves axially.
The utility model discloses in not restricting the quantity of retaining ring 40, the quantity of retaining ring 40 is one or more, can set up the quantity of retaining ring 40 according to the maximum pressure in the valve chamber cavity 50, can suitably increase the quantity of retaining ring 40 when the maximum pressure in the valve chamber cavity is great.
The utility model discloses in, the size of sealing washer sets up according to actual conditions, the embodiment of the utility model provides an in preferred, star type sealing washer 30's internal diameter is 80mm ~ 160mm, and star type sealing washer 30's external diameter is 83mm ~ 180mm, and star type sealing washer 30's width is 1.5mm ~ 10 mm. The star-shaped sealing ring 30 with the size can well realize the sealing between the gland 20 and the hydraulic end valve box 10.
The utility model discloses in, still including pressing cap 60, pressing cap 60 and gland 20 cooperation, and pressing cap 60 and hydraulic end valve case 10 fixed connection. The pressing cap 60 is located in the pressing cap 60 hole and located on the outer side of the gland 20, the pressing cap 60 abuts against the outer side surface of the gland 20 to limit the gland 20, meanwhile, the pressing cap 60 is in threaded connection with the sealing hole 11, fixed connection between the pressing cap 60 and the hydraulic end valve box 10 is achieved, and meanwhile, the gland 20 is also fixedly connected.
In the installation the utility model provides a during star type sealing washer 30, need get rid of spot and dirt with the recess 21 sanitization of gland 20, after the recess 21 sanitization of gland 20, need evenly paint lubricating oil or lubricating grease in the recess 21 department of gland 20, then wash spot and the dirt on star type sealing washer 30 surface, evenly paint lubricating oil or lubricating grease on the surface after star type sealing washer 30 sanitization. The star-shaped sealing ring 30 is assembled in the groove 21 of the gland 20, two sealing lips on the inner side of the star-shaped sealing ring 30 are in interference fit with the outer diameter (namely, the groove bottom) of the groove 21 of the gland 20, dirt and dirt on the surface of the sealing hole 11 of the hydraulic end valve box 10 are cleaned, and lubricating oil or lubricating grease is uniformly coated on the surface of the sealing hole 11. And (3) assembling the gland 20 with the assembled star-shaped sealing ring 30 into the sealing hole 11 of the hydraulic end valve box 10, wherein two sealing lips on the outer side of the star-shaped sealing ring 30 are in interference fit with the sealing hole 11 of the hydraulic end valve box 10, and the unilateral interference magnitude is 0.15-2.5 mm. The pressing cap 60 is screwed into the hole of the pressing cap 60 of the hydraulic end valve box 10 by means of the assembling tool, so that the inner plane of the pressing cap 60 is pressed against the outer side surface of the pressing cover 20 to be fastened without loosening.
By adopting the sealing structure at the hydraulic end of the plunger pump, the sealing ring is the star-shaped sealing ring 30, when the plunger pump works, when the plunger 70 moves leftwards, the liquid can enter the valve box cavity 50 from the suction end 80, at the moment, the pressure in the cavity is lower, the star-shaped sealing ring 30 can move leftwards at the moment, when the plunger 70 moves rightwards, the liquid can be extruded and discharged from the discharge end 90, the pressure is very high, for example, 90MPa can be reached, the star-shaped sealing ring 30 can move rightwards, the whole process is very fast, the star-shaped sealing ring 30 can continuously and rapidly move, the inner side of the star-shaped sealing ring 30 is provided with two sealing lips, the outer side is provided with two sealing lips, at least two seals can be formed, the sealing effect is good, the sealing ring is not easy to twist in the operation process, the concave part between the adjacent sealing lips can store lubricating oil, the friction between the star-shaped sealing ring 30 and the hydraulic end valve box 10 as well as between the sealing ring and the gland 20 can be reduced, in the reciprocating motion operation of the plunger pump, the abrasion of the hydraulic end valve box 10 and the gland 20 is reduced, and the service life of the sealing structure is prolonged.
The utility model discloses what the key description in the above embodiment is different between each embodiment, and different optimization characteristics are as long as not contradictory between each embodiment, all can make up and form more preferred embodiment, consider that the literary composition is succinct, then no longer describe here.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. The utility model provides a plunger pump fluid end seal structure, its characterized in that, includes fluid end valve box, gland, sealing washer and retaining ring, fluid end valve box inside has the valve box cavity, be equipped with the sealed hole on the fluid end valve box, the gland sets up in the sealed hole, the periphery of gland is equipped with the recess, the sealing washer with the retaining ring sets up in the recess, the sealing washer sets up being close to of recess one side of valve box cavity, the retaining ring sets up keeping away from of recess one side of valve box cavity, the sealing washer is star type sealing washer.
2. The plunger pump fluid end seal arrangement of claim 1 wherein said gland has a central axis, said groove includes a notch and a groove bottom, said notch being remote from said central axis relative to said groove bottom, said star seal including an inner side facing said groove bottom and an outer side facing said fluid end valve housing, said groove bottom being in interference fit with said inner side, said outer side being in interference fit with said fluid end valve housing.
3. The plunger pump fluid end seal arrangement of claim 2, wherein said inner side is provided with at least two sealing lips, said groove being an interference fit with said sealing lips.
4. The plunger pump fluid end seal arrangement of claim 2, wherein said outer side is provided with at least two sealing lips that are an interference fit with said fluid end valve housing.
5. The plunger pump hydraulic end sealing structure according to any one of claims 2 to 4, wherein the ratio of the axial dimension to the radial dimension of the sealing ring after the interference fit is 1.05 to 1.55.
6. The plunger pump hydraulic end seal structure of claim 5, wherein the ratio of the radial dimension of the seal ring after interference fit to the radial dimension of the seal ring before interference fit is 0.75-0.95.
7. The plunger pump hydraulic end sealing structure according to any one of claims 2-4, wherein the single-sided interference of the interference fit is 0.15 mm-2.5 mm.
8. The plunger pump hydraulic end seal structure of claim 3 or 4, wherein adjacent ones of at least two of the seal lips have a recess therebetween for receiving lubricating oil.
9. The plunger pump fluid end seal arrangement of claim 2 wherein said retainer ring includes an inner ring facing said groove bottom and an outer ring facing said fluid end valve housing, said inner ring being in contact engagement with said groove bottom and said outer ring being in contact engagement with said fluid end valve housing.
10. The plunger pump fluid end seal structure of claim 9, wherein the number of said retainer rings is one or more.
11. The plunger pump hydraulic end sealing structure as claimed in claim 1, wherein the inner diameter of the star-shaped sealing ring is 80 mm-160 mm, the outer diameter of the star-shaped sealing ring is 83 mm-180 mm, and the width of the star-shaped sealing ring is 1.5 mm-10 mm.
12. The plunger pump fluid end seal structure of claim 1, further comprising a pressure cap, wherein the pressure cap is engaged with the gland and is fixedly connected with the fluid end valve box.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364493.2U CN214887626U (en) | 2021-02-08 | 2021-02-08 | Plunger pump hydraulic end sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364493.2U CN214887626U (en) | 2021-02-08 | 2021-02-08 | Plunger pump hydraulic end sealing structure |
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| Publication Number | Publication Date |
|---|---|
| CN214887626U true CN214887626U (en) | 2021-11-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120364493.2U Active CN214887626U (en) | 2021-02-08 | 2021-02-08 | Plunger pump hydraulic end sealing structure |
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| CN (1) | CN214887626U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718833A (en) * | 2022-03-08 | 2022-07-08 | 烟台杰瑞石油服务集团股份有限公司 | Bushing structure and hydraulic end valve box of fracturing pump |
| CN115234464A (en) * | 2022-07-27 | 2022-10-25 | 四川宏华电气有限责任公司 | Carbon dioxide fracturing release device |
-
2021
- 2021-02-08 CN CN202120364493.2U patent/CN214887626U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114718833A (en) * | 2022-03-08 | 2022-07-08 | 烟台杰瑞石油服务集团股份有限公司 | Bushing structure and hydraulic end valve box of fracturing pump |
| CN114718833B (en) * | 2022-03-08 | 2024-01-23 | 烟台杰瑞石油服务集团股份有限公司 | Hydraulic end valve box of fracturing pump |
| CN115234464A (en) * | 2022-07-27 | 2022-10-25 | 四川宏华电气有限责任公司 | Carbon dioxide fracturing release device |
| CN115234464B (en) * | 2022-07-27 | 2024-08-20 | 四川宏华电气有限责任公司 | Carbon dioxide fracturing release device |
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