CN216306029U - Supercharger pressure end sealing structure for high-supercharging system - Google Patents
Supercharger pressure end sealing structure for high-supercharging system Download PDFInfo
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- CN216306029U CN216306029U CN202123210095.4U CN202123210095U CN216306029U CN 216306029 U CN216306029 U CN 216306029U CN 202123210095 U CN202123210095 U CN 202123210095U CN 216306029 U CN216306029 U CN 216306029U
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Abstract
The utility model relates to the technical field of turbochargers, in particular to a supercharger pressure end sealing structure for a high-supercharging system, which comprises a labyrinth sealing assembly and a piston sealing assembly, wherein the labyrinth sealing assembly comprises a gas compressing impeller and a pressure end sealing cover, the piston sealing assembly comprises a bearing shell, a disc, a small piston ring, a large piston ring and a spindle, the labyrinth sealing is formed by the gas compressing impeller and the pressure end sealing cover, the ultrahigh-pressure gas flow on the back of the pressure end wheel is subjected to first pressure reduction throttling, the piston ring sealing is formed by the pressure end sealing cover, the disc, the small piston ring and the large piston ring, the high-pressure gas subjected to pressure reduction throttling is subjected to pressure reduction throttling sealing again, the pressure end sealing capacity is achieved, the normal and reliable operation of a supercharger is ensured, and the problem of large leakage amount of the supercharger pressure end sealing for the high-supercharging system is effectively solved.
Description
Technical Field
The utility model relates to the technical field of turbochargers, in particular to a supercharger pressure end sealing structure for a high-supercharging system.
Background
With the development of diesel engine technology towards high supercharging, the diesel engine system has been applied to a two-stage supercharger system matching technology, and the turbocharger is used as a key matching set of the diesel engine. The ultrahigh pressure brings the problem of bearing lubricating oil tightness to the supercharger.
The pressure end of the conventional supercharger is sealed into a single piston ring structure, under the condition of ultrahigh pressure working condition, a piston ring at the pressure end of the turbocharger is seriously abraded, a large amount of high-pressure gas enters a bearing oil cavity and enters lubricating oil, and oil film cavitation is easily caused to occur in a bearing-rotor of the running supercharger, so that oil film lubrication of the bearing-rotor is ineffective, and the bearing is burnt.
Therefore, in order to solve the problem of sealing leakage of the pressure end of the ultrahigh pressure supercharger, the design of the sealing structure of the pressure end of the supercharger for the high-pressure supercharging system is an effective method.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a pressure end sealing structure of a supercharger for a high-supercharging system, and aims to solve the problem of sealing leakage of a pressure end of an ultrahigh-pressure supercharger.
In order to achieve the aim, the utility model provides a supercharger pressure end sealing structure for a high supercharging system, which comprises a labyrinth sealing assembly and a piston sealing assembly, wherein the labyrinth sealing assembly is arranged on one side of the piston sealing assembly;
the labyrinth seal assembly comprises an air compressing impeller and a pressure end seal cover, and the air compressing impeller is arranged on one side of the pressure end seal cover;
piston seal assembly includes bearing housing, oil thrower dish, little piston ring, big piston ring and main shaft, the bearing housing set up in press the end sealed lid to keep away from compress air impeller one side, the oil thrower dish set up in press the end sealed lid to be close to bearing housing one side, little piston ring set up in the oil thrower dish is close to press end sealed lid one side, big piston ring set up in little piston ring keeps away from oil thrower dish one side, the main shaft set up in the oil thrower dish inside wall.
The piston sealing assembly further comprises a fixing bolt, and the fixing bolt is in threaded connection with the bearing shell and penetrates through the pressure end sealing cover.
Wherein, the impeller of calming the anger has the sealed annular, sealed annular is located and is close to the sealed lid one side of pressure end, the sealed lid of pressure end has big end annular and tip annular, big end annular with the tip annular all is located and is close to impeller one side of calming the anger.
The pressure end sealing cover is provided with a large piston ring limiting groove and a small piston ring limiting groove, the large piston ring limiting groove is located on one side, close to the large piston ring, of the pressure end sealing cover, and the small piston ring limiting groove is located on one side, close to the small piston ring, of the pressure end sealing cover.
The oil thrower is provided with two oil thrower rings, a large piston ring sealing boss and a small piston ring sealing boss, the oil thrower rings are located close to one side of the pressure end sealing cover, the large piston ring sealing boss and the small piston ring sealing boss are located close to one side of the large piston ring and the small piston ring, and the oil return groove is located on one side of the oil thrower ring close to the pressure end sealing cover.
The utility model relates to a supercharger pressure end sealing structure for a high-supercharging system, wherein the radius clearance of a small end of a compressed air impeller and a small end circumferential ring groove of a pressure end sealing cover is not more than 0.5mm, the pressure end sealing cover, an oil thrower, a large piston ring and a small piston ring form a piston ring structure, the piston rings are used in a large and small combination mode, the large piston rings are open piston rings, the number of the large piston rings is 2, the large piston rings are used in pairs, the small piston rings are hasp piston rings, the number of the small piston rings is 1, the labyrinth sealing assembly is formed by the compressed air impeller and the pressure end sealing cover, the first decompression throttling is carried out on the ultrahigh pressure gas flow on the back of the pressure end wheel, the bearing shell provides mounting conditions for the pressure end sealing cover, a main shaft is fixedly connected with the compressed air impeller and the oil thrower to form an expanded air cavity, and the pressure end sealing cover, The oil thrower dish little piston ring big piston ring is constituteed piston ring seal assembly reduces the pressure throttle again to the high-pressure gas of decompression throttle and seals, reaches the sealed ability of pressure end, guarantees the booster normal reliable operation, effectively solves the problem that the booster for the high supercharging system presses the end to seal and lets out leakage quantity big.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a pressure end sealing structure of a supercharger for a high supercharging system provided by the utility model.
Fig. 2 is a partial perspective view of detail a of fig. 1.
Fig. 3 is a partial perspective view of detail B of fig. 1.
Reference numerals: 1-compressed air impeller, 2-compressed end sealing cover, 3-fixing bolt, 4-bearing shell, 5-oil slinger, 6-main shaft, 7-small piston ring, 8-large piston ring, 9-small end labyrinth seal, 10-expanded air cavity, 11-large end labyrinth seal, 12-sealing ring groove, 13-large end ring groove, 14-small end ring groove, 15-oil return groove, 16-large piston ring limiting groove, 17-small piston ring limiting groove, 18-oil slinger, 19-large piston ring sealing boss, 20-small piston ring sealing boss, 21-labyrinth sealing component and 22-piston sealing component.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
In the description of the present invention, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Referring to fig. 1 to 3, the present invention provides a pressure end sealing structure of a supercharger for a high supercharging system, including a labyrinth seal assembly 21 and a piston seal assembly 22, wherein the labyrinth seal assembly 21 is disposed on one side of the piston seal assembly 22;
the labyrinth seal assembly 21 comprises an air compressing impeller 1 and a pressure end sealing cover 2, wherein the air compressing impeller 1 is arranged on one side of the pressure end sealing cover 2;
In this embodiment, the radius gap between the small end of the compressor impeller 1 and the small end of the compressor seal cover 2 in the circumferential direction is not more than 0.5mm, the compressor seal cover 2 and the oil thrower disk 5, the large piston ring 8 and the small piston ring 7 form a piston ring structure, wherein the large piston ring 8 is an open piston ring, the number of the piston ring is 2, the piston ring is used in pairs, the small piston ring 7 is a hasp, the number of the piston ring is 1, the labyrinth seal assembly 21 is formed by the compressor impeller 1 and the compressor seal cover 2, the first decompression and throttling is performed on the ultrahigh pressure gas flow at the back of the compressor impeller, the installation condition is provided for the compressor seal cover 2 through the bearing shell 4, the main shaft 6 is fixedly connected with the compressor impeller 1 and the oil thrower disk 5 to form an expanded air cavity 10, and the compressor seal cover 2, the oil thrower disk 5 and the small piston ring 7 form an expanded air cavity 10, The large piston ring 8 forms the piston ring sealing assembly, and the high-pressure gas subjected to pressure reduction and throttling is subjected to pressure reduction and throttling sealing again, so that the capacity of sealing the pressure end is achieved, the normal and reliable operation of the supercharger is ensured, and the problem of large leakage amount of the pressure end sealing of the supercharger for a high-supercharging system is effectively solved.
Further, the piston sealing assembly 22 further comprises a fixing bolt 3, wherein the fixing bolt 3 is in threaded connection with the bearing shell 4 and penetrates through the pressure end sealing cover 2; the pressure end sealing cover 2 is also provided with a large piston ring limiting groove 16 and a small piston ring limiting groove 17, the large piston ring limiting groove 16 is positioned on one side of the pressure end sealing cover 2 close to the large piston ring 8, and the small piston ring limiting groove 17 is positioned on one side of the pressure end sealing cover 2 close to the small piston ring 7; the pressure end sealing cover 2 is further provided with an oil return groove 15, the oil slinger 5 is provided with two oil slingers 18, a large piston ring sealing boss 19 and a small piston ring sealing boss 20, the oil slingers 18 are located close to one side of the pressure end sealing cover 2, the large piston ring sealing boss 19 and the small piston ring sealing boss 20 are located close to one sides of the large piston ring 8 and the small piston ring 7, and the oil return groove 15 is located on one side of the pressure end sealing cover 2 close to one side of the oil slinger 18.
In this embodiment, the pressure end sealing cover 2 is fixed on the bearing housing 4 through the fixing bolt 3, the large piston ring 8 and the small piston ring 7 are both installed on the pressure end sealing cover 2, the large piston ring limiting groove 16 and the small piston ring limiting groove 17 on the pressure end sealing cover 2 respectively carry out bearing limiting on the large piston ring 8 and the small piston ring 7, the large piston ring sealing boss 19 and the small piston ring sealing boss 20 on the oil thrower 5 realize the contact type dynamic sealing of the large piston ring 8 and the small piston ring 7, and carry out zero leakage sealing on the gas at the pressure reduction end, so as to achieve the effect of sealing the pressure end of the ultra-high pressure supercharger, the oil thrower ring 18, the oil return groove 15 and the oil thrower 5 rotate together with the main shaft 6, and throw the lubricating oil of the pressure end bearing into the oil return cavity of the bearing housing 4, and the reverse leakage of the lubricating oil to the sealing position of the pressure end is avoided.
Further, impeller 1 of calming anger has sealed annular 12, sealed annular 12 is located and is close to 2 one sides of the sealed lid of pressure end, 2 of the sealed lid of pressure end have big end annular 13 and tip annular 14, big end annular 13 with tip annular 14 all is located and is close to impeller 1 one side of calming anger.
In the embodiment, a plurality of sealing ring grooves 12 are distributed on the back of the compressor impeller 1, and are combined with the large-end ring groove 13 and the small-end ring groove 14 on the compressor end sealing cover 2 to form two labyrinth seals; when the high-pressure gas at the pressure end enters the large-end labyrinth seal 11, the extended air cavity and the small-end labyrinth seal 9, the throttling, depressurizing and re-throttling processes are carried out, and the pressure and the flow of the reduced high-pressure air are greatly reduced.
While the utility model has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (5)
1. A pressure end sealing structure of a supercharger for a high supercharging system is characterized in that,
the piston sealing device comprises a labyrinth sealing assembly and a piston sealing assembly, wherein the labyrinth sealing assembly is arranged on one side of the piston sealing assembly;
the labyrinth seal assembly comprises an air compressing impeller and a pressure end seal cover, and the air compressing impeller is arranged on one side of the pressure end seal cover;
piston seal assembly includes bearing housing, oil thrower dish, little piston ring, big piston ring and main shaft, the bearing housing set up in press the end sealed lid to keep away from compress air impeller one side, the oil thrower dish set up in press the end sealed lid to be close to bearing housing one side, little piston ring set up in the oil thrower dish is close to press end sealed lid one side, big piston ring set up in little piston ring keeps away from oil thrower dish one side, the main shaft set up in the oil thrower dish inside wall.
2. The pressure end sealing structure of a supercharger for a high supercharging system according to claim 1,
the piston sealing assembly further comprises a fixing bolt, and the fixing bolt is in threaded connection with the bearing shell and penetrates through the pressure end sealing cover.
3. The pressure end sealing structure of a supercharger for a high supercharging system according to claim 1,
the impeller of calming the anger has sealed annular, sealed annular is located and is close to the sealed lid one side of pressure end, the sealed lid of pressure end has main aspects annular and tip annular, main aspects annular with the tip annular all is located and is close to impeller one side of calming the anger.
4. The pressure end sealing structure of a supercharger for a high supercharging system according to claim 1,
the pressure end sealing cover is also provided with a large piston ring limiting groove and a small piston ring limiting groove, the large piston ring limiting groove is positioned at one side of the pressure end sealing cover close to the large piston ring, and the small piston ring limiting groove is positioned at one side of the pressure end sealing cover close to the small piston ring.
5. The pressure end sealing structure of a supercharger for a high supercharging system according to claim 1,
the pressure end sealing cover is provided with an oil return groove, the oil slinger is provided with two oil slingers, a large piston ring sealing boss and a small piston ring sealing boss, the oil slingers are located close to one side of the pressure end sealing cover, the large piston ring sealing boss and the small piston ring sealing boss are located close to one side of the large piston ring and the small piston ring, and the oil return groove is located the pressure end sealing cover is close to one side of the oil slinger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123210095.4U CN216306029U (en) | 2021-12-20 | 2021-12-20 | Supercharger pressure end sealing structure for high-supercharging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123210095.4U CN216306029U (en) | 2021-12-20 | 2021-12-20 | Supercharger pressure end sealing structure for high-supercharging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216306029U true CN216306029U (en) | 2022-04-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123210095.4U Active CN216306029U (en) | 2021-12-20 | 2021-12-20 | Supercharger pressure end sealing structure for high-supercharging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216306029U (en) |
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2021
- 2021-12-20 CN CN202123210095.4U patent/CN216306029U/en active Active
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