CN215172222U - Sealing joint for lubricating crankshaft of fracturing pump - Google Patents
Sealing joint for lubricating crankshaft of fracturing pump Download PDFInfo
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- CN215172222U CN215172222U CN202121611363.0U CN202121611363U CN215172222U CN 215172222 U CN215172222 U CN 215172222U CN 202121611363 U CN202121611363 U CN 202121611363U CN 215172222 U CN215172222 U CN 215172222U
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- joint
- transmission pipe
- cover
- crankshaft
- end cover
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Abstract
The utility model discloses a fracturing pump crankshaft lubrication sealing joint, which comprises a switching joint, a switching transmission pipe, a joint end cover and a support shell, wherein the joint end cover is connected with the support shell, the switching transmission pipe is connected with the joint end cover, and the switching joint is connected with the switching transmission pipe; the adapter joint, the adapter transmission pipe, the joint end cover and the support shell are all provided with hollow channels, and the joints are kept sealed; the switching transmission pipe is of a double-layer cylinder structure, one end of the switching transmission pipe is provided with a cover body, a flow channel is arranged between the cover body and the cylinder body, an opening at one end of the flow channel is arranged on the cover body and communicated with the outer side of the cover body, an opening at the other end of the flow channel is arranged at one end, far away from the cover body, of the cylinder body, and the inner side of the switching transmission pipe is in clearance fit with the end of a crankshaft shaft. The utility model discloses a seal structure improves, lets the more stable connection of sealing member ability, keeps sealed effect, improves the life-span of field usage to the distribution to lubricating oil is more even.
Description
Technical Field
The utility model relates to an oil development equips technical field, in particular to fracturing unit technical field specifically is a fracturing pump is sealing joint for crankshaft lubrication.
Background
In oil and gas field development, a fracturing pump is one of the common devices for stimulation construction, and is used for injecting high-pressure and large-discharge fracturing fluid into a well, pressing a stratum open and squeezing a propping agent into a fracture. The method is mainly used for various fracturing operations of oil wells and gas wells. The equipment can perform stand-alone and on-line operation. The power machine of the fracturing pump drives the crankshaft of the pump to rotate, and the crankshaft drives the piston or the plunger to reciprocate in the pump cylinder through the crosshead. However, in the current technical scheme, for example, chinese patent application No. 202010622398.8, "switching seal structure and fracturing pump" proposes a technical scheme that can transport lubricating oil through the side surface and maintain the dynamic seal effect, but the seal structure used in the technology is connected loosely, and the situation of unstable seal is easy to occur under the environment of long-term vibration and rotation, resulting in leakage.
SUMMERY OF THE UTILITY MODEL
To the problem, the utility model provides a fracturing pump is sealing joint for crankshaft lubrication improves through seal structure, lets the more stable connection of sealing member ability, keeps sealed effect, improves the life-span of field usage to the distribution to lubricating oil is more even.
The technical scheme of the utility model is that:
a sealing joint for lubricating a crankshaft of a fracturing pump comprises a connecting joint, a switching transmission pipe, a joint end cover and a support shell, wherein the support shell is part of a fracturing pump shell, the joint end cover is connected with the support shell, the switching transmission pipe is connected onto the joint end cover, and the connecting joint is connected with the switching transmission pipe; the connecting joint, the switching transmission pipe, the joint end cover and the support shell are all provided with hollow channels, and the joints are kept sealed; the switching transmission pipe is of a double-layer cylinder structure, one end of the switching transmission pipe is provided with a cover body, a flow channel is arranged between the cover body and the cylinder body, an opening at one end of the flow channel is arranged on the cover body and communicated with the outer side of the cover body, an opening at the other end of the flow channel is arranged at one end, far away from the cover body, of the cylinder body, and the inner side of the switching transmission pipe is in clearance fit with the end of a crankshaft shaft.
Preferably, the number of the flow passages arranged on the inner side of the cylinder body of the switching transmission pipe is multiple, the flow passages are uniformly distributed in the cylinder body, and the flow passages are converged on the cover on one side of the cover of the cylinder body.
Preferably, the number of the flow passages arranged on the inner side of the cylinder body of the switching transmission pipe is four.
Preferably, the supporting shell is provided with a round hole for extending the end of the crankshaft to one section, and the round hole is internally provided with a rolling bearing for supporting the end of the crankshaft.
Preferably, the outer side of the cylinder body of the switching transmission pipe is provided with an expanding section, and the expanding section is close to one end far away from the cover body and keeps a distance with one end of the other end of the cylinder body; the outer diameter of the diameter expanding section is the same as that of the joint end cover, corresponding unthreaded holes are formed in the diameter expanding section and the joint end cover, threaded holes are formed in the supporting shell, the threaded holes formed in the supporting shell correspond to the positions of the unthreaded holes in the diameter expanding section and the joint end cover, the through-connection transmission pipe and the joint end cover are fixed on the supporting shell through screws, and the screws serve as third screws.
Preferably, the adapter transmission pipe is provided with an extension ring surface opposite to the direction of the cylinder body on the edge of the cover body, the extension ring surface is provided with a plurality of threaded holes, the connecting joint is of a cylindrical structure, the outer side wall of the adapter transmission pipe is provided with an expanding section at a position away from the end part, the expanding section is provided with a plurality of through holes corresponding to the threaded holes on the edge of the cover body of the adapter transmission pipe, the connecting joint and the adapter transmission pipe are fixedly connected through screws, and cover screws are used as second screws.
Preferably, the connector end cover is further arranged, the connector end cover is structurally a multilayer stepped pipe body, one end, with the smallest pipe diameter, of the connector end cover is attached to the connector, a plurality of through holes are formed in one end, with the largest pipe diameter, of the connector end cover, a plurality of threaded holes are further formed in the support shell, the distance from the threaded holes to the round hole of the support shell is larger than those of threaded holes connected with the shaft section end cover, the threaded holes correspond to the through holes of the connector end cover and are connected through screws, and the screws serve as first screws.
Preferably, a sealing groove is formed in the contact surface of the outer side of the connecting joint and the joint end cover, a sealing ring is installed in the sealing groove and serves as a third sealing ring for sealing the contact surface of the connecting joint and the joint end cover.
Preferably, the adapter transfer pipe is provided with a sealing groove on the inner side of the extending ring surface of the cover body, a sealing ring is installed in the adapter transfer pipe and serves as a second sealing ring, and the second sealing ring is in contact sealing with the outer side wall of the connecting joint.
Preferably, the switching transmission pipe is provided with a sealing groove on the inner side of the cylinder body, a sealing ring is installed in the switching transmission pipe and serves as a first sealing ring, and the first sealing ring is used for being in contact sealing with the end of the crankshaft.
The utility model has the advantages that:
1. adopt the utility model provides a structure, dynamic friction seal that can be effectual between realization bent axle head and the bearing end cover becomes static seal, has guaranteed sealing performance, guarantees not taking place the excessive at the in-process to antifriction bearing transport lubricating oil.
2. Through the improvement to the structure, strengthened the stability of connecting, let a plurality of parts can realize connecting through a screw, let the overall connection stability reinforcing of mechanism, further improve sealed effect.
3. The joint end cover is arranged, so that the external stability can be better maintained, and a multi-stage sealing guarantee is provided.
Drawings
FIG. 1 is a schematic view of a partial cross-sectional structure of a fracturing pump zone where a crankshaft is located;
FIG. 2 is an enlarged view of area A of FIG. 1;
FIG. 3 is a detail view of a third seal ring region;
FIG. 4 is a detail view of the first seal ring region;
fig. 5 is a schematic diagram of the movement of the lubricating oil in a certain flow passage of the transfer transmission pipe.
In the figure:
1. the crankshaft end; 2. a rolling bearing; 3. a support housing; 4. a first screw; 5. a shaft end cover; 6. transferring and transmitting pipes; 7. a connector end cap; 8. connecting a joint; 9. a third seal ring; 10. a second seal ring; 11. a second screw; 12. a third screw; 13. a first seal ring.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, 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.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected", "first" and "second" are to be interpreted broadly, e.g. as either a fixed connection or a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1-4, a sealing joint for lubricating a crankshaft of a fracturing pump comprises a connecting joint 8, a switching transmission pipe 6, a joint end cover 5 and a support housing 3, wherein the support housing 3 is a part of a fracturing pump housing, the joint end cover 5 is connected with the support housing 3, the switching transmission pipe 6 is connected with the joint end cover 5, and the connecting joint 8 is connected with the switching transmission pipe 6; the connecting joint 8, the switching transmission pipe 6, the joint end cover 5 and the support shell 3 are all provided with hollow channels, and the joints are kept sealed; the transfer transmission pipe 6 is a double-layer cylinder structure with a cover body at one end, a plurality of flow channels are arranged between the cover body and the cylinder body, an opening at one end of each flow channel is arranged on the cover body and communicated with the outer side of the cover body, an opening at the other end of each flow channel is arranged at one end of the cylinder body far away from the cover body, the four flow channels are preferably arranged, are uniformly distributed in the cylinder body (an upper flow channel and a lower flow channel which are connected with the cover body and are shown in the section of the flow channels in figure 2), are converged on the cover at one side of the cover of the cylinder body, and the inner side of the transfer transmission pipe 6 is in clearance fit with the shaft end 1 of the crankshaft. The outer side of the cylinder body of the transfer transmission pipe 6 is provided with an expanding section, and the expanding section is close to one end far away from the cover body and keeps a distance with one end of the other end of the cylinder body; the outer diameter of the diameter expanding section is the same as that of the joint end cover 5, corresponding unthreaded holes are formed in the diameter expanding section and the joint end cover 5, threaded holes are formed in the support shell 3, the threaded holes formed in the support shell 3 correspond to the positions of the unthreaded holes in the diameter expanding section and the joint end cover 5, the switching transmission pipe 6 and the joint end cover 5 are fixed on the support shell 3 through screws, and the screws are used as third screws 12. The switching transmission pipe 6 is provided with an extension ring surface opposite to the direction of the cylinder body on the edge of the cover body, the extension ring surface is provided with a plurality of threaded holes, the connecting joint 8 is of a cylindrical structure, the outer side wall of the connecting joint is provided with an expanding section at a position away from the end part, the expanding section is provided with a plurality of through holes corresponding to the threaded holes on the edge of the cover body of the switching transmission pipe 6, the connecting joint 8 and the switching transmission pipe 6 are fixedly connected through screws, and cover screws are used as second screws 11. The switching transmission pipe 6 is provided with a sealing groove on the inner side of the extending ring surface of the cover body, a sealing ring is installed in the sealing groove and serves as a second sealing ring 10, and the second sealing ring 10 is in contact sealing with the outer side wall of the connecting joint 8. The switching transmission pipe 6 is provided with a sealing groove on the inner side of the cylinder body, a sealing ring is installed in the sealing groove to serve as a first sealing ring 13, the first sealing ring 13 is used for being in contact sealing with the crankshaft end 1, and particularly, the purpose of the first sealing ring 13 is to limit lubricating oil near the rolling bearing 2, but the first sealing ring 13 is not limited in some cases, and lubricating liquid can move in the whole region of the crankshaft end 1, so that the inner diameter of the first sealing ring 13 can be larger than that of the crankshaft end 1, and only plays a role in buffering impact, as shown in fig. 1, 2, 4 and 5.
The supporting shell 3 is provided with a round hole for extending the crankshaft shaft end 1 to the outer side of the round hole, the inner wall surface of the round hole is provided with a rolling bearing 2, lubricating oil is mainly used for lubricating the rolling bearing 2, the rolling bearing 2 is used for supporting the crankshaft shaft end 1, one end of the rolling bearing 2 is in contact with the switching transmission pipe 6 and is abutted against the switching transmission pipe, but the rolling bearing 2 is not hindered from rotating.
Still be equipped with and connect end cover 7, the structure that connects end cover 7 is multilayer step type body, the one end that connects 7 pipe diameters of end cover is minimum laminates with attach fitting 8, connect end cover 7 and be equipped with a plurality of through-holes at its pipe diameter is the biggest one end, still be equipped with a plurality of screw holes on the support housing 3, and the distance of these screw holes to the round hole of support housing 3 is greater than the screw hole of being connected with shaft part end cover 5, these screw holes with the through-hole that connects end cover 7 corresponds to through the screw connection, this screw is as first screw 4. The outer side of the connecting joint 8 is provided with a sealing groove at the contact surface with the joint end cover 7, and a sealing ring is installed in the sealing groove and used as a third sealing ring 9 for sealing the contact surface between the connecting joint 8 and the joint end cover 7.
The utility model discloses after connecting, outside lubricating oil passes through pipe connection to attach fitting 8 to send into switching transmission pipe 6 through attach fitting 8, contact antifriction bearing 2's different positions respectively through four evenly distributed's of switching transmission pipe 6 runners, as shown in fig. 5, even lubrication lets antifriction bearing 2 can evenly drive bent axle head 1 and rotates, reduces the rotational wear.
The utility model discloses adopt the screw connection respectively to a plurality of components, especially connect end cover 7 and support housing 3, switching transmission pipe 6 and shaft part end cover 5 and support housing 3 between be connected, compare in prior art, possess better stability.
The above description is only a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments, and although the present invention has been disclosed with the preferred embodiments, it is not limited to the present invention, and any skilled person in the art can make some modifications or equivalent embodiments without departing from the scope of the present invention, but all the technical matters of the present invention are within the scope of the present invention.
Claims (10)
1. The sealing joint for lubricating the crankshaft of the fracturing pump is characterized by comprising a connecting joint (8), a switching transmission pipe (6), a joint end cover (5) and a supporting shell (3), wherein the supporting shell (3) is a part of a fracturing pump shell, the joint end cover (5) is connected with the supporting shell (3), the switching transmission pipe (6) is connected onto the joint end cover (5), and the connecting joint (8) is connected with the switching transmission pipe (6); the connecting joint (8), the switching transmission pipe (6), the joint end cover (5) and the support shell (3) are all provided with hollow channels, and the joints are kept sealed; the switching transmission pipe (6) is of a double-layer cylinder structure, one end of the switching transmission pipe is provided with a cover body, a flow channel is arranged between the cover body and the cylinder body, an opening at one end of the flow channel is arranged on the cover body and communicated with the outer side of the cover body, an opening at the other end of the flow channel is arranged at one end, far away from the cover body, of the cylinder body, and the inner side of the switching transmission pipe (6) is in clearance fit with the end (1) of the crankshaft.
2. The seal joint for lubricating the crankshaft of the fracturing pump according to claim 1, wherein the switching transmission pipe (6) is provided with a plurality of flow passages on the inner side of the cylinder body, the flow passages are uniformly distributed in the cylinder body and converged on the cover on one side of the cover of the cylinder body.
3. The sealing joint for lubricating the crankshaft of the fracturing pump as claimed in claim 2, wherein the number of the flow passages arranged on the inner side of the cylinder body of the switching transmission pipe (6) is four.
4. The seal joint for lubricating the crankshaft of the fracturing pump according to claim 3, wherein the support housing (3) is provided with a round hole for allowing the crankshaft end (1) to extend out by a section, and a rolling bearing (2) is arranged in the round hole for supporting the crankshaft end (1).
5. The sealing joint for lubricating the crankshaft of the fracturing pump according to claim 4, wherein the outer side of the cylinder body of the switching transmission pipe (6) is provided with an expanded diameter section, and the expanded diameter section is close to one end far away from the cover body and keeps a distance with the other end of the cylinder body; the outer diameter of the diameter expanding section is the same as that of the joint end cover (5), corresponding unthreaded holes are formed in the diameter expanding section and the joint end cover (5), threaded holes are formed in the supporting shell (3), the threaded holes formed in the supporting shell (3) correspond to the unthreaded holes in the diameter expanding section and the joint end cover (5), the adapting transmission pipe (6) and the joint end cover (5) are fixed on the supporting shell (3) through screws, and the screws serve as third screws (12).
6. The fracturing pump crankshaft lubrication sealing joint according to claim 5, wherein the adapter transmission pipe (6) is provided with an extension ring surface opposite to the cylinder body at the edge of the cover body, the extension ring surface is provided with a plurality of threaded holes, the connecting joint (8) is of a cylindrical structure, the outer side wall of the adapter transmission pipe is provided with an expanding section at a position away from the end part, the expanding section is provided with a plurality of through holes corresponding to the threaded holes at the edge of the cover body of the adapter transmission pipe (6), the connecting joint (8) and the adapter transmission pipe (6) are fixedly connected through screws, and the cover screws are used as second screws (11).
7. The sealing joint for lubricating the crankshaft of the fracturing pump according to claim 6, wherein a joint end cover (7) is further provided, the structure of the joint end cover (7) is a multi-layer stepped pipe body, the end with the smallest pipe diameter of the joint end cover (7) is attached to the connecting joint (8), the joint end cover (7) is provided with a plurality of through holes at the end with the largest pipe diameter, the support shell (3) is further provided with a plurality of threaded holes, the distance from the threaded holes to the round hole of the support shell (3) is larger than the threaded holes connected with the shaft section end cover (5), the threaded holes correspond to the through holes of the joint end cover (7) and are connected through screws, and the screws are used as the first screws (4).
8. The seal joint for lubricating the crankshaft of the fracturing pump according to claim 7, wherein the outer side of the connecting joint (8) is provided with a seal groove at the contact surface with the joint end cover (7), and a seal ring is installed in the seal groove as a third seal ring (9) for sealing the contact surface of the connecting joint (8) and the joint end cover (7).
9. The seal joint for lubricating the crankshaft of the fracturing pump according to claim 8, wherein the adapter transmission pipe (6) is provided with a seal groove on the inner side of the extending ring surface of the cover body, a seal ring is installed in the seal groove to serve as a second seal ring (10), and the second seal ring (10) is in contact seal with the outer side wall of the connecting joint (8).
10. The sealing joint for lubricating the crankshaft of the fracturing pump according to claim 9, wherein the adapter transfer pipe (6) is provided with a sealing groove at the inner side of the cylinder body, a sealing ring is installed in the sealing groove as a first sealing ring (13), and the first sealing ring (13) is used for being in contact with and sealing with the crankshaft end (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121611363.0U CN215172222U (en) | 2021-07-15 | 2021-07-15 | Sealing joint for lubricating crankshaft of fracturing pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121611363.0U CN215172222U (en) | 2021-07-15 | 2021-07-15 | Sealing joint for lubricating crankshaft of fracturing pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215172222U true CN215172222U (en) | 2021-12-14 |
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ID=79395394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121611363.0U Active CN215172222U (en) | 2021-07-15 | 2021-07-15 | Sealing joint for lubricating crankshaft of fracturing pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215172222U (en) |
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2021
- 2021-07-15 CN CN202121611363.0U patent/CN215172222U/en active Active
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