CN203769867U - Shaft seal structure of turbocharger - Google Patents
Shaft seal structure of turbocharger Download PDFInfo
- Publication number
- CN203769867U CN203769867U CN201420109513.1U CN201420109513U CN203769867U CN 203769867 U CN203769867 U CN 203769867U CN 201420109513 U CN201420109513 U CN 201420109513U CN 203769867 U CN203769867 U CN 203769867U
- Authority
- CN
- China
- Prior art keywords
- shaft seal
- shaft
- flange
- diffusion plate
- turbosupercharger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000009792 diffusion process Methods 0.000 claims description 33
- 239000011148 porous material Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 abstract description 11
- 239000000314 lubricant Substances 0.000 description 2
- 238000005461 lubrication Methods 0.000 description 2
- 239000002912 waste gas Substances 0.000 description 2
- 230000037250 Clearance Effects 0.000 description 1
- 210000004907 Glands Anatomy 0.000 description 1
- 230000033558 biomineral tissue development Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000035512 clearance Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000001052 transient Effects 0.000 description 1
Abstract
The utility model discloses a shaft seal structure of a turbocharger. The shaft seal structure of the turbocharger comprises a pressure expanding plate which is matched with a pressure shell of the turbocharger, a shaft hole is formed in the pressure expanding plate, a turbine shaft penetrates the shaft hole, a shaft seal is arranged between the turbine shaft and the pressure expanding plate, an impeller is disposed on the turbine shaft, a gap is formed between the impeller and the pressure expanding plate, a flange is designed at one end of the shaft seal, a sealing ring groove is formed in the shaft seal, a sealing ring is disposed in the sealing ring groove, an annular groove is formed in the pressure expanding plate, the outer diameter of the annular groove is smaller than that of the flange, an elastic part is disposed in the annular groove, one end of the annular groove, which is adjacent to the flange, is provided with an auxiliary sealing ring, an air hole is formed in a position of the other end of the annular groove, the gap formed between the pressure expanding plate and the impeller is communicated with the air hole, and the auxiliary sealing ring is in contact with the flange. According to the shaft seal structure of the turbocharger, the auxiliary sealing ring is additionally arranged and fit with the flange of the shaft seal so that oil can be isolated furthest, and the risk that oil leaks towards a pressing end of the turbocharger is reduced from the source.
Description
Technical field
The utility model relates to a kind of shaft seal structure, relates in particular to a kind of shaft seal structure of turbosupercharger.
Background technique
At present, there are a lot of automobiles to adopt the motor of turbocharger arrangement, turbosupercharger is actually a kind of air compressing, it is that the waste gas inertial force that utilizes motor to discharge promotes the turbine in turbine chamber, turbine drives again coaxial impeller, the air that impeller force feed is sent here by air-strainer pipeline, makes it supercharging and enters cylinder.Turbosupercharger on existing market, oil sealing ability, the loss of lubricant oil is larger, and in order to improve oil sealing ability, often the gap between diffusion plate and shaft seal is less, and rotor-support-foundation system runs up after wearing and tearing for a long time, and degree of unbalancedness increases, easily cause the phenomenon of shaft seal mill diffusion plate, thereby greatly reduce the working life of shaft seal.
Model utility content
The purpose of this utility model is for the problems referred to above, and a kind of shaft seal structure of turbosupercharger is provided, and to solve existing turbosupercharger oil sealing ability, lubrication oil consumption is large, shaft seal short problem in working life.
The purpose of this utility model is to be achieved through the following technical solutions:
A kind of shaft seal structure of turbosupercharger, comprise the diffusion plate matching with the pressure shell of turbosupercharger, on described diffusion plate, have axis hole, turbine shaft is through this axis hole, and be provided with shaft seal between turbine shaft and diffusion plate, on described turbine shaft, be provided with impeller, between described impeller and diffusion plate, be formed with gap, one end of described shaft seal is provided with flange, and in shaft seal, have closure gasket groove, in described closure gasket groove, be provided with seal ring, on described diffusion plate, have circular groove, the external diameter of described circular groove is less than the external diameter of flange, in circular groove, be provided with elastic component, and one end of circular groove adjacent flange is provided with auxiliary seal ring, its the other end has pore, described diffusion plate, the gap forming between impeller is connected with pore, described auxiliary seal ring contacts with flange.
Preferably, described closure gasket groove is 1 or 2.
Preferably, described elastic component is Compress Spring.
Preferably, the end face that described auxiliary seal ring contacts with flange is circular-arc.
Preferably, the bottom of described auxiliary seal ring is provided with opening.
The beneficial effects of the utility model are, the shaft seal structure of described turbosupercharger is by setting up auxiliary seal ring, the flange of auxiliary seal ring and shaft seal fits, to greatest extent oil is isolated, from source, reduced to the risk of turbosupercharger pressure side leakage of oil, meanwhile, can amplify the gap between diffusion plate and the flange of shaft seal, thereby the phenomenon of effectively avoiding shaft seal mill diffusion plate, has extended the working life of shaft seal.
Accompanying drawing explanation
Fig. 1 is the structural representation of the shaft seal structure of a kind of turbosupercharger of the utility model;
Fig. 2 is that the shaft seal structure of a kind of turbosupercharger shown in Fig. 1 is at the enlarged view at A place;
Fig. 3 is the structural representation of the utility model auxiliary seal ring.
In figure:
1, turbine shaft; 11, positive stop lug boss; 2, impeller; 3, diffusion plate; 31, oil back chamber; 32, circular groove; 33, Compress Spring; 34, auxiliary seal ring; 341, opening; 35, pore; 4, intermediate; 5, thrust bearing; 51, oilhole; 6, setting sleeve; 7, shaft seal; 71, seal ring; 72, flange.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, further illustrate the technical solution of the utility model.
Please refer to shown in Fig. 1 to Fig. 3, Fig. 1 is the structural representation of the shaft seal structure of a kind of turbosupercharger of the utility model; Fig. 2 is that the shaft seal structure of a kind of turbosupercharger shown in Fig. 1 is at the enlarged view at A place; Fig. 3 is the structural representation of the utility model auxiliary seal ring.
In the present embodiment, a kind of shaft seal structure of turbosupercharger, comprise the diffusion plate 3 matching with the pressure shell of turbosupercharger, on described diffusion plate 3, have axis hole, turbine shaft 1 is through this axis hole, and be provided with shaft seal 7 between turbine shaft 1 and diffusion plate 3, on turbine shaft 1, be provided with positive stop lug boss 11, and between positive stop lug boss 11 and shaft seal 7, be provided with setting sleeve 6 on turbine shaft 1, thrust bearing 5, the left side of described thrust bearing 5 contacts with shaft seal 7, its right side contacts with setting sleeve 6, and on thrust bearing 5, have oilhole 51, described oilhole 51 is inclined hole, can play throttling action, on turbine shaft 1, be positioned at diffusion plate 3 right-hand members and be provided with intermediate 4, and on turbine shaft 1, be positioned at diffusion plate 3 left ends and be provided with impeller 2, between described impeller 2 and diffusion plate 3, be formed with gap, the right-hand member of described shaft seal 7 is provided with flange 72, and in shaft seal 7, have 1 closure gasket groove, in described closure gasket groove, be provided with seal ring 71, on described diffusion plate 3, have circular groove 32, the external diameter of described circular groove 32 is less than the external diameter of flange 72, in circular groove 32, be provided with Compress Spring 33, and the right-hand member of circular groove 32 is provided with auxiliary seal ring 34, its left end has pore 35, described diffusion plate 3, the gap forming between impeller 2 is connected with pore 35, described auxiliary seal ring 34 contacts with flange 72, and the end face that auxiliary seal ring 34 contacts with flange 72 is circular-arc, the bottom of auxiliary seal ring 34 is provided with opening 341.
By adopting above-mentioned shaft seal structure, after engine start, in 3-4s, the filler opening of the intermediate 4 of turbosupercharger will be set up at least 69KPa oil pressure, and while normally moving, the inlet pressure of intermediate 4 generally remains on 196～392KPa.Pressure oil enters by the oilhole 51 on thrust bearing 5, mineralization pressure oil film between the surface of contact of surface of contact, shaft seal 7 and the thrust bearing 5 of setting sleeve 6 and thrust bearing 5, the axial force that high-temp waste gas drives turbine rotation and impeller 2 pressurized air to produce makes rotor-support-foundation system energy balance be suspended in a certain position, the operating mode difference of motor has determined the variation of position, finally obtains transient equiliblium.The shaft seal 7 of High Rotation Speed, setting sleeve 6 throws away the oil overflowing, moment, the oil saved bit by bit was pooled to the oil back chamber 31 of diffusion plate, radially matching with the circular groove 32 of diffusion plate 3 of auxiliary seal ring 34, axial and shaft seal 7 surface of contact of auxiliary seal ring 34 are designed to circular-arc, thereby making it circularize line with the flange 72 of shaft seal 7 contacts, good contact sealing, by the oil isolation throwing away, from source, reduced to the risk of turbosupercharger pressure side leakage of oil, meanwhile, the setting of Compress Spring 33, can help auxiliary seal ring 34 to follow shaft seal 7 axially fluctuates, the circular groove 32 of diffusion plate 3 play the guiding role, can meet to greatest extent the various operating modes of motor, prevent the leakage of oil of turbosupercharger pressure side, the circular groove 32 of diffusion plate 3 is provided with pore 35, between the wheel back of the body of impeller 2 and diffusion plate 3, gap and the pore 35 of formation communicate, between the wheel back of the body of impeller 2 and diffusion plate, the air pressure in gap is greater than the pressure in circular groove 32, pressure in circular groove 32 is greater than the pressure in oil back chamber 31, it is mainly to reduce excessive oil to enter circular groove 32 by auxiliary seal ring 34 radial clearances that air pressure falls progressively, a small amount of oil enters that circular groove 32 is interior can play lubrication, auxiliary seal ring 34 is provided with opening 341, during assembling opening 341 below, the unnecessary lubricant oil of circular groove 32 can flow back to oil back chamber 31, existence in view of auxiliary seal ring 34, gap between the flange 72 of diffusion plate 3 and shaft seal 7 can be amplified to 0.5～2mm, effectively avoid rotor-support-foundation system to run up for a long time after wearing and tearing, degree of unbalancedness increases and shaft seal 7 mill diffusion plate 3 phenomenons that cause, thereby has extended the working life of shaft seal 7.
One of value is carried, and shaft seal structure of the present utility model is equally applicable to adopt the turbosupercharger of sealing gland plate.
Above embodiment has just set forth basic principle of the present utility model and characteristic; the utility model is not limited by above-described embodiment; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various variations and change, and these variations and change all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (5)
1. the shaft seal structure of a turbosupercharger, comprise the diffusion plate matching with the pressure shell of turbosupercharger, on described diffusion plate, have axis hole, turbine shaft is through this axis hole, and be provided with shaft seal between turbine shaft and diffusion plate, on described turbine shaft, be provided with impeller, between described impeller and diffusion plate, be formed with gap, it is characterized in that: one end of described shaft seal is provided with flange, and in shaft seal, have closure gasket groove, in described closure gasket groove, be provided with seal ring, on described diffusion plate, have circular groove, the external diameter of described circular groove is less than the external diameter of flange, in circular groove, be provided with elastic component, and one end of circular groove adjacent flange is provided with auxiliary seal ring, its the other end has pore, described diffusion plate, the gap forming between impeller is connected with pore, described auxiliary seal ring contacts with flange.
2. the shaft seal structure of a kind of turbosupercharger according to claim 1, is characterized in that: described closure gasket groove is 1 or 2.
3. the shaft seal structure of a kind of turbosupercharger according to claim 1, is characterized in that: described elastic component is Compress Spring.
4. the shaft seal structure of a kind of turbosupercharger according to claim 1, is characterized in that: the end face that described auxiliary seal ring contacts with flange is circular-arc.
5. according to the shaft seal structure of a kind of turbosupercharger described in claim 1 or 4, it is characterized in that: the bottom of described auxiliary seal ring is provided with opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109513.1U CN203769867U (en) | 2014-03-11 | 2014-03-11 | Shaft seal structure of turbocharger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420109513.1U CN203769867U (en) | 2014-03-11 | 2014-03-11 | Shaft seal structure of turbocharger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203769867U true CN203769867U (en) | 2014-08-13 |
Family
ID=51287067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420109513.1U Active CN203769867U (en) | 2014-03-11 | 2014-03-11 | Shaft seal structure of turbocharger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203769867U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332146A (en) * | 2019-08-07 | 2019-10-15 | 中国北方发动机研究所(天津) | A kind of compressor end sealing structure of turbosuperchargers |
| CN110685953A (en) * | 2019-10-14 | 2020-01-14 | 中国北方发动机研究所(天津) | Controlled booster compressor end sealing structure of sequential supercharging system |
-
2014
- 2014-03-11 CN CN201420109513.1U patent/CN203769867U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110332146A (en) * | 2019-08-07 | 2019-10-15 | 中国北方发动机研究所(天津) | A kind of compressor end sealing structure of turbosuperchargers |
| CN110332146B (en) * | 2019-08-07 | 2020-11-06 | 中国北方发动机研究所(天津) | End sealing structure of compressor of turbocharger |
| CN110685953A (en) * | 2019-10-14 | 2020-01-14 | 中国北方发动机研究所(天津) | Controlled booster compressor end sealing structure of sequential supercharging system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |