CN210920108U

CN210920108U - Piston column shaft seal device for fracturing pump

Info

Publication number: CN210920108U
Application number: CN201922155710.2U
Authority: CN
Inventors: 杨勇
Original assignee: Jingzhou Tiande Petroleum Machinery Parts Manufacturing Co ltd
Current assignee: Jingzhou Tiande Petroleum Machinery Parts Manufacturing Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-07-03
Anticipated expiration: 2029-12-05

Abstract

A piston column shaft seal device for a fracturing pump is used for solving the technical problem that a gap is generated between a piston column and a sealing ring due to continuous friction between the piston column and the sealing ring, and further the sealing ring cannot be sealed for a long time, and comprises the piston column and a piston sleeve which is coaxial with the piston column, high-pressure liquid oil is filled between the piston column and the piston sleeve, the piston column penetrates through the piston sleeve and can move along the penetrating direction, the piston column can rotate around an axis, an elastic sealing ring is arranged in the gap between the piston sleeve and the piston column, the elastic sealing ring is sleeved on the piston column in an interference fit manner, the elastic sealing ring is fixedly and hermetically connected with the circumferential inner wall of the same radial section of the piston sleeve, and one side of the elastic sealing ring, which is in contact with the high-pressure liquid oil, forms an annular surface corresponding to the oil pressure direction of the high-pressure liquid oil, the piston-column shaft seal is mainly used for a fracturing pump piston-column shaft seal.

Description

Piston column shaft seal device for fracturing pump

Technical Field

The utility model relates to a fracturing pump technical field for shale gas exploitation, concretely relates to can effectively prolong piston column shaft seal device of the structural piston column bearing seal age of fracturing pump.

Background

The energy crisis in the world is increasingly severe nowadays, meanwhile, the excessive use of fossil fuels causes serious environmental problems, the search for new alternative energy is urgent, with the active exploration of energy by people, the unconventional natural gas of shale gas brings the visual field of people, the exploitation process of shale gas is harder, in the process, people find that the shale gas is exploited by means of a fracturing pump, and then the shale gas is greatly gushed into the production and life of people, so that a better energy source is provided for the sustainable and healthy development of society, and the fracturing pump is not only applied to the exploitation field of shale natural gas, but also has more applications in the fields of metallurgy and mines.

As shown in fig. 5, the fracturing pump structure includes a piston column (a) and a piston sleeve (b), the piston column (a) is coaxial with the piston sleeve (b), the piston column (a) penetrates through the piston sleeve (b) and can move along the penetrating direction, the piston column (a) can rotate around an axis, high-pressure liquid oil (c) is arranged between the piston column (a) and the piston sleeve (b), a sealing ring (d) made of rubber is arranged at the joint of the piston column (a) and the piston sleeve (b), the sealing ring (d) is coaxial with the piston column (a), the sealing ring (d) is fixed on the inner wall of the piston sleeve (b) and is hermetically connected with the piston sleeve (b), the sealing ring (d) is matched with the piston column (a) and is sleeved on the piston column (a), and at the moment, the sealing ring (d) can effectively prevent the high-pressure liquid oil (c) from the piston column (a), The joint between the piston sleeve (b) leaks, thereby achieving a sealing effect against the high-pressure liquid oil (c).

However, the conventional manner of arranging the sealing ring (d) has an objective defect that: because piston post (a) need remove along wearing to establish the direction in the course of the work, piston post (a) can frequently produce sliding friction with sealing washer (d) along wearing to establish the in-process that the direction removed, it is long-lasting, sealing washer (d) will be worn and torn under the effect of continuous friction, and then make and form the clearance of certain size between sealing washer (d) and piston post (a), high-pressure liquid oil (c) will also flow out piston sleeve (b) through this clearance, thereby can not reach sealing effect lastingly.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the purpose is not enough to prior art, releases a piston post shaft seal device for fracturing pump for solve mention among the background art because continuous friction between piston post, the sealing washer, thereby cause to produce the clearance between piston post, the sealing washer, and then unable messenger's sealing washer reaches long-time sealed technical problem.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the utility model provides a piston post shaft seal device for fracturing pump, including piston post and with the coaxial piston cover of piston post, it has high-pressure liquid oil to fill between piston post, the piston cover, and the piston post is worn to establish this piston cover and can be followed and is worn to establish the direction and remove, and the piston post can rotate around the axis, be equipped with the elastic sealing ring in the clearance between piston cover and the piston post, this elastic sealing ring interference fit cover is established on the piston post, and the elastic sealing ring and the same radial cross-section's of piston cover circumference inner wall sealing connection, this elastic sealing ring and one side of high-pressure liquid oil contact form with the corresponding annular pressure face of high-pressure liquid oil pressure direction to make the annular pressure face of elastic sealing ring warp to piston post axle center in order to paste the piston post under the effect of high-pressure liquid.

The working principle is as follows: the piston column reciprocates along the penetrating direction in operation, and in the process, high-pressure liquid oil generates continuous pressure on the elastic sealing ring, the pressure continuously acts on the elastic sealing ring, so that the elastic sealing ring is tightly attached to the periphery of the piston column, and along with the reciprocating motion of the piston column along the penetrating direction for a long time, continuous friction is generated between the piston column and the elastic sealing ring, so that the elastic sealing ring is worn, however, under the action of the continuous pressure generated by the high-pressure liquid oil on the annular pressure surface of the elastic sealing ring, the elastic sealing ring generates uniform extrusion deformation under the action of the pressure, so that the elastic sealing ring is continuously and tightly attached to the periphery of the piston column, and the continuous sealing effect is achieved.

The utility model has the advantages that:

the utility model discloses with the help of elastic sealing ring, elastic sealing ring interference fit cover establish on the piston post, elastic sealing ring and the fixed sealing connection of piston sleeve inner wall, and elastic sealing ring towards the annular pressure face that one side formation of high-pressure liquid oil met mutually with the oil pressure direction of high-pressure liquid oil, high-pressure liquid oil will be right annular pressure face produces the pressure that lasts, and this pressure will make elastic sealing ring produces even deformation, thereby will as the piston post after the elastic sealing ring wearing and tearing, the continuous pressure that high-pressure liquid oil produced elastic sealing ring will make elastic sealing ring warp and last hug closely the piston post to prevent to produce the clearance between piston post, the elastic sealing ring, this kind of mode can prolong elastic sealing ring's life, thereby improved elastic sealing ring's sealed result of use.

Drawings

Fig. 1 is a schematic structural diagram of an embodiment of the present invention;

fig. 2 is an enlarged schematic view of the structure at a in fig. 1 according to an embodiment of the present invention;

fig. 3 is an enlarged schematic structural view of the elastic sealing ring according to the embodiment of the present invention;

fig. 4 is an enlarged schematic structural view of the annular mounting block in the embodiment of the present invention;

fig. 5 is a schematic view of the assembly of the piston post, piston sleeve and seal ring in the prior art.

Description of reference numerals: piston post a, piston cover b, high-pressure liquid oil c, sealing washer d, elastic sealing ring 1, annular pressurized surface 2, annular installation piece 3, annular arch 4, first annular mounting groove 5, elasticity beaded finish 6, second annular mounting groove 7.

Detailed Description

The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.

As shown in fig. 1 and fig. 2, a piston column shaft seal device for a fracturing pump comprises a piston column a and a piston sleeve b coaxial with the piston column a, wherein high-pressure liquid oil c is filled between the piston column a and the piston sleeve b, the piston column a penetrates through the piston sleeve b and can move along the penetrating direction, the piston column a can rotate around a shaft line, an elastic sealing ring 1 is arranged in a gap between the piston sleeve b and the piston column a, the elastic sealing ring 1 is sleeved on the piston column a in an interference fit manner, the elastic sealing ring 1 is fixedly and hermetically connected with the circumferential inner wall of the same radial section of the piston sleeve b, an annular pressure receiving surface 2 corresponding to the oil pressure direction of the high-pressure liquid oil c is formed on one side of the elastic sealing ring 1 contacting the high-pressure liquid oil c, so that the annular pressure receiving surface 2 of the elastic sealing ring 1 deforms towards the shaft center of the piston column a under the action of the high-pressure liquid oil c to, traditional sealing washer d has been replaced to this kind of mode to through elastic sealing ring 1's pressurized deformation compensates elastic sealing ring 1's wearing and tearing, can make elastic sealing ring 1 last under the condition that receives wearing and tearing with piston post an interference fit, improved elastic sealing ring 1's sealing performance, can further improve elastic sealing ring 1's sealed service life.

As shown in fig. 3 and 4, fixed sealing connection one and the coaxial annular installation piece 3 of piston post an on the piston bush b inner wall, this annular installation piece 3 is equipped with the annular arch 4 coaxial with piston post an towards one side of high-pressure liquid oil c, be equipped with the first annular mounting groove 5 with the protruding 4 adaptations of annular on the elastic sealing ring 1, the protruding 4 joints of annular just with 5 sealing connection of first annular mounting groove in first annular mounting groove 5, this kind of mode can realize fast joint cooperation installation between elastic sealing ring 1, the annular installation piece 3 improves the utility model discloses an assembly efficiency. Annular protrusion 4 circumference all buckles towards piston post a, the opening direction of first annular mounting groove 5 is complied with annular protrusion 4's the direction of buckling, and this kind of mode can make annular protrusion 4 form better support to elastic sealing ring 1 through first annular mounting groove 5, thereby has improved annular receives the ability that face 2 bore high-pressure liquid oil c high pressure impact, is favorable to improving the firm degree of installation between elastic sealing ring 1, the annular installation piece 3.

Be equipped with one on the elastic sealing ring 1 with the elastic reinforcement ring 6 of elastic sealing ring 1 integrated into one piece, this elastic reinforcement ring 6 is coaxial with piston post an, it has one second annular mounting groove 7 coaxial with piston post an to open on the annular installation piece 3, the 6 joints of elastic reinforcement ring are installed in second annular mounting groove 7, and the joint cooperation between this second annular mounting groove 7 and the elastic reinforcement ring 6 has further stabilized fixed connection intensity between elastic sealing ring 1 and the annular installation piece 3 to it is right to be favorable to adapting to high-pressure liquid oil c annular receives surface 2 to produce higher pressure impact, has guaranteed the utility model discloses it is more stable in the operation process. First annular mounting groove 5 and elastic sealing ring 1 integrated into one piece, just first annular mounting groove 5 forms through vulcanization technology processing, and this kind of mode has guaranteed that first annular mounting groove 5 does not form through the fluting that carries on elastic sealing ring 1 to guaranteed from the source the wholeness of elastic sealing ring 1 structure, thereby guaranteed intensity, elasticity and the integrality of elastic sealing ring 1 self structure, and then be favorable to further improving the utility model discloses a time limit of use.

The working principle is as follows: the first annular mounting groove 5 is formed through a vulcanization process, the second annular mounting groove 7 and the annular bulge 4 on the annular mounting block 3 respectively correspond to the elastic reinforcing ring 6 and the first annular mounting groove 5, then the annular bulge 4 is clamped and mounted in the first annular mounting groove 5 in a clamping mounting mode, the elastic reinforcing ring 6 is clamped and mounted in the second annular mounting groove 7, at the moment, the elastic sealing ring 1 and the annular mounting block 3 are fixedly formed into a whole, then the elastic sealing ring 1 and the annular mounting block 3 are fixedly mounted on the inner wall of the piston sleeve b as a whole from one end of the piston sleeve b, the elastic sealing ring 1, the annular mounting block 3 and the piston sleeve b are kept coaxial, then the piston column a is arranged in the piston sleeve b in a penetrating mode and penetrates through the elastic sealing ring 1, the elastic sealing ring 1 and the piston column a are in interference fit at the moment.

The piston column a reciprocates along the penetrating direction in operation, in the process, high-pressure liquid oil c generates continuous pressure on the elastic sealing ring 1, the pressure continuously acts on the elastic sealing ring 1, so that the elastic sealing ring 1 is tightly attached to the periphery of the piston column a, continuous friction is generated between the piston column a and the elastic sealing ring 1 along with the reciprocating motion of the piston column a along the penetrating direction for a long time, the elastic sealing ring 1 is worn, however, under the action of the continuous pressure generated by the high-pressure liquid oil c on the annular pressure receiving surface 2 of the elastic sealing ring 1, the elastic sealing ring 1 generates uniform extrusion deformation under the action of the pressure, so that the elastic sealing ring 1 is continuously tightly attached to the periphery of the piston column a, and the continuous sealing action is achieved.

Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.

Claims

1. The utility model provides a piston post shaft seal device for fracturing pump, including piston post (a) and with piston post (a) coaxial piston cover (b), it has high-pressure liquid oil (c) to fill between piston post (a), the piston cover (b), piston post (a) is worn to establish this piston cover (b) and can be followed and is worn to establish the direction and remove, and piston post (a) can rotate its characterized in that around the axis: be equipped with elastic sealing ring (1) in the clearance between piston cover (b) and piston post (a), this elastic sealing ring (1) interference fit cover is established on piston post (a), and elastic sealing ring (1) and the same radial cross-section's of piston cover (b) circumference inner wall sealing connection, one side that this elastic sealing ring (1) and high-pressure liquid oil (c) contact forms annular compression face (2) corresponding with high-pressure liquid oil (c) oil pressure direction to annular compression face (2) that make elastic sealing ring (1) warp to piston post (a) axle center under high-pressure liquid oil (c) effect in order to hug closely piston post (a).

2. The piston column shaft seal device for the fracturing pump according to claim 1, wherein: fixed sealing connection one and piston post (a) coaxial annular installation piece (3) on piston sleeve (b) inner wall, this annular installation piece (3) are equipped with annular arch (4) coaxial with piston post (a) towards one side of high-pressure liquid oil (c), be equipped with on elastic sealing ring (1) with annular arch (4) adaptation first annular mounting groove (5), annular arch (4) joint just with first annular mounting groove (5) sealing connection in first annular mounting groove (5).

3. The piston column shaft seal device for the fracturing pump according to claim 2, wherein: the protruding end edge of the annular protrusion (4) is bent towards the piston column (a), and the opening direction of the first annular mounting groove (5) is compliant with the bending direction of the protruding end edge of the annular protrusion (4).

4. A piston column shaft seal device for a fracturing pump according to any one of claims 2 or 3, wherein: be equipped with one on elastic sealing ring (1) with elastic sealing ring (1) integrated into one piece's elasticity beaded finish (6), this elasticity beaded finish (6) are coaxial with piston post (a), it has one second annular mounting groove (7) coaxial with piston post (a) to open on annular installation piece (3), elasticity beaded finish (6) joint is installed in second annular mounting groove (7).

5. A piston column shaft seal device for a fracturing pump according to any one of claims 2 or 3, wherein: the first annular mounting groove (5) and the elastic sealing ring (1) are integrally formed.