CN205298557U - Starter motor leather cup for turbo shaft engine - Google Patents
Starter motor leather cup for turbo shaft engine Download PDFInfo
- Publication number
- CN205298557U CN205298557U CN201620045031.3U CN201620045031U CN205298557U CN 205298557 U CN205298557 U CN 205298557U CN 201620045031 U CN201620045031 U CN 201620045031U CN 205298557 U CN205298557 U CN 205298557U
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- CN
- China
- Prior art keywords
- internal ring
- rubber
- spring
- ring
- contact area
- 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.)
- Expired - Fee Related
Links
- 239000010985 leather Substances 0.000 title claims abstract description 28
- 239000007858 starting material Substances 0.000 title abstract 2
- 239000012530 fluid Substances 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 5
- 239000002184 metal Substances 0.000 abstract 1
- 238000007789 sealing Methods 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to a starter motor leather cup for turbo shaft engine, including annular rubber, metal framework, spring, this annular rubber includes inner ring rubber and outer loop rubber, and inner ring rubber comprises first inner ring, second inner ring, the third inner ring of going up certainly to setting gradually down, and the third inner ring is the toper setting, and the second inner ring is the back taper setting, and the endocyclic diapire of second intersects with the endocyclic roof of third, constitutes this motor leather cup and the contact zone of the rotation axis waiting to seal, contained angle in this second between ring side wall and the inner ring rubber axial is 25, and the spring is annular tension springs, and the outside of contact zone is located to this spring, forms the shrink to this contact zone, fluorubber F370 is chooseed for use to annular rubber, and it can effectively to improve its wear resistance and high temperature resistance, the endocyclic lateral wall of second divides boudle strip oil drive back thread to produce the pump effect of inhaling when making the rotation axis rotation, force the fluid that is about to leak to return, thereby reach the effect that reduces the leakage or do not leak.
Description
Technical field
This utility model relates to dynamic sealing technology field, and specifically a kind of turboshaft engine is with starting motor leather cup.
Background technology
Leather cup is dynamic sealing assembly conventional in mechanical system, is applied to the position that sliding speed is relatively low. Leather cup is made up of metallic framework, rubber cup and spring; Its sealing principle be oil sealing in a free state, lip internal diameter is less than axle journal external diameter, and axle journal has during without spring certain radial pressure, but this pressure can be gradually reduced with the prolongation of the time of use, to be therefore compensated by with addition of spring.
Chinese patent CN201320020372.1 discloses the leather cup installed on a kind of Helicopter Main Reducer, including ring-shaped rubber, metallic framework, spring, inside described ring-shaped rubber, annular lip is set, it is internally provided with the metallic framework of annular, the position being internally located at lip of leather cup is provided with spring, described spring is annular tension spring, is provided with the head-stamp of indent in the position that described ring-shaped rubber and leather cup seated connection touch, and solves head-stamp projection and produces the problem of inclination; But this leather cup in use yet suffers from the problem of leakage of oil, confirm as leather cup lip place through site inspection and there is heavy wear, cause leather cup too short for service life, it is necessary to frequently to change.
Thering is provided a kind of simple in construction, turboshaft engine not easy to wear, long service life to start motor leather cup is those skilled in the art's technical issues that need to address.
Utility model content
In order to solve the problems referred to above, this utility model provides a kind of turboshaft engine and starts motor leather cup, including ring-shaped rubber, metallic framework, spring, this ring-shaped rubber includes internal ring rubber and outer shroud rubber, the roof of this internal ring rubber and outer shroud rubber is wholely set, described metallic framework is arranged between internal ring rubber and outer shroud rubber and is positioned at below outer shroud rubber roof, outer shroud rubber is formed and supports; Described internal ring rubber is made up of the first internal ring set gradually from top to bottom, the second internal ring, the 3rd internal ring, the described 3rd tapered setting of internal ring, described second internal ring is that inverted cone is arranged, the diapire of described second internal ring and the roof of the 3rd internal ring intersect, and constitute the contact area of this motor leather cup and rotating shaft to be sealed; During assembling, the first internal ring, the second internal ring are in sealed sides, and the 3rd internal ring is in air side; This in second ring-side wall and described internal ring rubber axially between angle be 25 ��, described spring be annular tension spring, and the outside of described contact area is located at by this spring, and this contact area is formed contraction;Described ring-shaped rubber selects fluorubber F370, is effectively improved its anti-wear performance and resistance to elevated temperatures.
The difference between annular diameters and rotating shaft diameter to be sealed under described contact area uncontracted position is 0.5��1.0mm, so that keeping suitable interference margin between described leather cup and rotating shaft, controls the enclasping force that the magnitude of interference produces; Ring-shaped rubber thickness between described spring and contact area is 1.2��1.4mm, residing for the center of this spring and described contact area, the vertical dimension of sagittal plane is 2.6��3.0mm, and this spring center relative to this contact area be partial to second internal ring arrange, control the clamping force that described spring produces, reduce the radial force of lip, thus reducing lip abrasion; The sidewall of described second internal ring is distributed a plurality of oil drive back thread, so that producing pump-absorb action when rotating shaft rotates, forces the fluid that namely will leak out to return, thus reaching the effect reducing leakage or not leaking.
Further, the trend of described oil drive back thread is identical with the direction of rotation of rotating shaft, and each oil drive back thread is evenly distributed on the sidewall of the second internal ring; The starting point end of described oil drive back thread is arranged on the second internal ring and the intersection of the 3rd internal ring, i.e. contact area, and destination terminal is arranged on the second internal ring and the intersection of the first internal ring, it is possible to effectively prevent the fluid leakage in annular seal space.
The technique effect of utility model: (1) turboshaft engine of the present utility model starts motor leather cup, relative to prior art, ring-shaped rubber selects fluorubber F370, is effectively improved its anti-wear performance and resistance to elevated temperatures; (2) difference between annular diameters and the rotating shaft diameter to be sealed of contact area is 0.5��1.0mm, so that keeping suitable interference margin between leather cup and rotating shaft, controls the enclasping force that the magnitude of interference produces; The sidewall of (3) second internal ring is distributed a plurality of oil drive back thread, the starting point end of oil drive back thread is arranged on the second internal ring and the intersection of the 3rd internal ring, i.e. contact area, destination terminal is arranged on the second internal ring and the intersection of the first internal ring, so that producing pump-absorb action when rotating shaft rotates, the fluid that namely will leak out is forced to return.
Accompanying drawing explanation
Below in conjunction with Figure of description, this utility model is described in further detail:
Fig. 1 is the structural representation that this utility model turboshaft engine starts motor leather cup.
In figure: outer shroud rubber 1, outer shroud rubber diapire 11, outer shroud rubber roof 12, spring 2, metallic framework 3, internal ring rubber 4, internal ring rubber diapire 41, the first internal ring 42, the second internal ring 43, the 3rd internal ring 44, contact area 45, oil drive back thread 46, stage portion 47.
Detailed description of the invention
Embodiment 1 is as shown in Figure 1, the turboshaft engine of the present embodiment is with starting motor leather cup, including ring-shaped rubber, metallic framework 3, spring 2, this ring-shaped rubber includes internal ring rubber 4 and outer shroud rubber 1, the roof of this internal ring rubber 4 and outer shroud rubber 1 is wholely set, metallic framework 3 is arranged between internal ring rubber 4 and outer shroud rubber 1 and is positioned at below outer shroud rubber roof 12, outer shroud rubber 1 is formed and supports; Internal ring rubber is made up of first internal ring the 42, second internal ring the 43, the 3rd internal ring 44 set gradually from top to bottom, the 3rd tapered setting of internal ring 44, second internal ring 43 is arranged in inverted cone, the diapire of the second internal ring 43 and the roof of the 3rd internal ring 44 intersect, and constitute the contact area 45 of this motor leather cup and rotating shaft to be sealed; This second internal ring 43 sidewall and internal ring rubber 4 axially between angle be 25 ��, the sidewall of the second internal ring 43 is uniformly distributed 50 left-handed oil drive back threads 46, identical with the direction of rotation of rotating shaft, the starting point end of each oil drive back thread 46 is arranged on the intersection of the second internal ring 43 and the 3rd internal ring 44, i.e. contact area 45, destination terminal is arranged on the intersection of the second internal ring 43 and the first internal ring 42;The outside of contact area 45 is provided with annular groove, and annular tension spring 2 is located in annular groove, this contact area 45 is formed and shrinks; The rotating shaft diameter of axle to be sealed is 27.5mm, this motor leather cup contact area 45 be pressed into spring 2 before diameter be 26.7mm, press-in spring 2 after diameter be 26.2mm; Difference between annular diameters and the rotating shaft diameter to be sealed of the press-in front contact area of spring 2 45 is 0.8mm, ring-shaped rubber thickness between spring 2 and contact area 45 is 1.4mm, and this spring 2 center is partial to the second internal ring 43 relative to this contact area 45 and arranges, residing for the center of this spring 2 and contact area 45, the vertical dimension of sagittal plane is 2.8mm; So that the clamping force that spring 2 produces is moderate, suitably reduce the radial force of lip, thus reducing lip abrasion.
Ring-shaped rubber selects fluorubber F370, is effectively improved its anti-wear performance and resistance to elevated temperatures; During assembling, first internal ring the 42, second internal ring 43 is in sealed sides, and the 3rd internal ring 44 is in air side; Under uncontracted position, the difference between annular diameters and the rotating shaft diameter to be sealed of contact area 45 is 0.5��1.0mm, so that keeping suitable interference margin between leather cup and rotating shaft, controls the enclasping force that the magnitude of interference produces; When rotating shaft drives skin wrist to rotate, the fluid near contact area produces pump-absorb action when rotated, forces the fluid that namely will leak out to return along oil drive back thread, thus reaching the effect reducing leakage or not leaking.
Obviously, above-described embodiment is only for clearly demonstrating this utility model example, and is not the restriction to embodiment of the present utility model. For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description. Here without also cannot all of embodiment be given exhaustive. And these belong to apparent change or variation that spirit of the present utility model extended out still among protection domain of the present utility model.
Claims (3)
1. a turboshaft engine is with starting motor leather cup, including ring-shaped rubber, metallic framework (3), spring (2), this ring-shaped rubber includes internal ring rubber (4) and outer shroud rubber (1), the roof of this internal ring rubber (4) and outer shroud rubber (1) is wholely set, and described metallic framework (3) is arranged between internal ring rubber (4) and outer shroud rubber (1) and is positioned at outer shroud rubber roof (12) lower section; It is characterized in that, described internal ring rubber (4) is made up of the first internal ring (42) set gradually from top to bottom, the second internal ring (43), the 3rd internal ring (44), described second internal ring (43) is arranged in inverted cone, described 3rd internal ring (44) tapered setting, the diapire of described second internal ring (43) and the roof of the 3rd internal ring (44) intersect, constitute the contact area (45) of this motor leather cup and rotating shaft to be sealed, during assembling, the first internal ring (42), the second internal ring (43) are in sealed sides, and the 3rd internal ring (44) is in air side; This second internal ring (43) sidewall and described internal ring rubber axially between angle be 25 ��, described spring (2) be annular tension spring, and the outside of described contact area (45) is located at by this spring (2); Described ring-shaped rubber selects fluorubber F370; The difference between annular diameters and rotating shaft diameter to be sealed under described contact area (45) uncontracted position is 0.5��1.0mm, ring-shaped rubber thickness between described spring (2) and contact area (45) is 1.2��1.4mm, residing for the center of this spring (2) and described contact area (45), the vertical dimension of sagittal plane is 2.6��3.0mm, and the center of this spring (2) is partial to the second internal ring (43) relative to this contact area (45) and arranges, the sidewall of described second internal ring (43) is distributed a plurality of oil drive back thread (46).
2. turboshaft engine according to claim 1 starts motor leather cup, it is characterised in that the trend of described oil drive back thread (46) is identical with the direction of rotation of rotating shaft, and each oil drive back thread (46) is evenly distributed on the sidewall of the second internal ring (43).
3. turboshaft engine according to claim 2 starts motor leather cup, it is characterized in that, the starting point end of described oil drive back thread (46) is arranged on the intersection of the second internal ring (43) and the 3rd internal ring (44), i.e. contact area (45), destination terminal is arranged on the intersection of the second internal ring (43) and the first internal ring (42).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620045031.3U CN205298557U (en) | 2016-01-18 | 2016-01-18 | Starter motor leather cup for turbo shaft engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620045031.3U CN205298557U (en) | 2016-01-18 | 2016-01-18 | Starter motor leather cup for turbo shaft engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205298557U true CN205298557U (en) | 2016-06-08 |
Family
ID=56428602
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620045031.3U Expired - Fee Related CN205298557U (en) | 2016-01-18 | 2016-01-18 | Starter motor leather cup for turbo shaft engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205298557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979333A (en) * | 2016-01-18 | 2017-07-25 | 常州兰翔机械有限责任公司 | A kind of turboshaft engine starting motor leather cup |
-
2016
- 2016-01-18 CN CN201620045031.3U patent/CN205298557U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106979333A (en) * | 2016-01-18 | 2017-07-25 | 常州兰翔机械有限责任公司 | A kind of turboshaft engine starting motor leather cup |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160608 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |