CN100398881C - High-speed engine shaft sealing method - Google Patents
High-speed engine shaft sealing method Download PDFInfo
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- CN100398881C CN100398881C CNB2006100420802A CN200610042080A CN100398881C CN 100398881 C CN100398881 C CN 100398881C CN B2006100420802 A CNB2006100420802 A CN B2006100420802A CN 200610042080 A CN200610042080 A CN 200610042080A CN 100398881 C CN100398881 C CN 100398881C
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- oil seal
- seal
- sealing
- interference
- inner oil
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- 238000007789 sealing Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000003068 static effect Effects 0.000 claims abstract description 11
- 244000309464 bull Species 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 67
- 230000006870 function Effects 0.000 description 12
- 230000000694 effects Effects 0.000 description 5
- 238000010009 beating Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008450 motivation Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- Sealing With Elastic Sealing Lips (AREA)
Abstract
The present invention discloses a shaft sealing method for a high speed engine, which adopts an inner and an outer oil seals of split type. An inner hole of the inner oil seal is in interference fit with an engine shaft, and the outside diameter of the outer oil seal in interference with a cavity and is fixed in the cavity. A sealing lip of the outer oil seal is in interference contact with a seal face of the inner oil seal to realize static seal function. The seal face of the inner oil seal is provided with a plurality of plane spiral lines, is in interference contact with a sealing lip of the outer oil seal, and realizes dynamic seal function through the centrifugal action at the time of rotation. A rotational contact surface of the inner oil seal is provided with plane helical lines which extend from the inner side to the outer side in the same rotational direction with the shaft. The invention has the characteristic that the invention uses the eccentric theory between the plane helical lines arranged on the seal face of the inner oil seal and the sealing medium when the inner oil seal rotates to reduce the requirement to the mounting eccentricity and axial displacement.
Description
One, technical field
The invention belongs to running shaft and use the oil seal technique field, especially relate to a kind of high-speed engine shaft sealing method that can improve high speed engine oil sealing life-span and emission standard.
Two, background technique
At present, the employed high speed rotating oil sealing of state's intrinsic motivation realizes that the principle of sealing is: utilize the high elasticity of rubber, make oil seal lip have one more radially to hold power tightly to axle, make the antelabium of oil sealing be close to the surface of axle all the time, and keep this to hold power tightly, realize sealing.Therefore, between lip and running shaft, can produce bigger frictional force, produce following defective: the one, quicken the wearing and tearing of lip and axle, reduce the oil sealing life-span: the 2nd, produce bigger friction Temperature Rise and friction torque, consume extra power; Simultaneously,, also be subjected to setting-up eccentricity and the axle quantitative limitation of beating, must under manufacturing that improves component and assembly precision, use according to the oil sealing of this principle design.Along with the continuous lifting of motor, need new sealing theory to realize the shaft sealing of high speed engine to rotating speed, life-span and emission standard.
Three, summary of the invention
The objective of the invention is to improve the deficiency of prior art and provide a kind of utilize plane thread that inner oil seal its seal face of when rotation is provided with to the centrifugal principle of sealing medium, reduce the high-speed engine shaft sealing method that setting-up eccentricity and axle jerk value are required.
The object of the present invention is achieved like this, a kind of high-speed engine shaft sealing method, be characterized in that this method is to adopt inside and outside split type oil sealing, the external diameter of the endoporus of inner oil seal and engine shaft interference assembling, outer oil seal and be fixed in the cavity with the cavity interference, the sealing lip of outer oil seal contacts with the seal face interference of inner oil seal, play the static seal function, the seal face of inner oil seal is provided with the bull plane thread, contact with the interference of outer oil seal sealing lip, centrifugal action during by rotation plays the motive sealing function.
In order further to realize purpose of the present invention, can be that the rotation surface of contact of inner oil seal is provided with plane thread, the initial outside end that extends to is identical with the sense of rotation of axle from the inboard.
The present invention adopts inside and outside split type oil sealing, the external diameter of the endoporus of inner oil seal and engine shaft interference assembling, outer oil seal and be fixed in the cavity with the cavity interference, and the sealing lip of outer oil seal contacts with the seal face interference of inner oil seal, plays the static seal function.
The seal face of inner oil seal is provided with the bull plane thread, contacts with the interference of outer oil seal sealing lip, and the centrifugal action principle during by rotation plays the motive sealing function; The linear velocity of promptly being used as the object of circular movement increases suddenly, and the suffered external force of object can't provide required centripetal force, and then object will produce centrifugal motion, that is to say, object will break away from original running orbit, and leave away along the direction vertical with centripetal force.Be applied in this example, when axle drives the inner oil seal high speed rotating, the suffered external force (being formed by multiple complicated power effects such as adhesion, chamber pressures) of medium can't provide required centripetal force, and medium will break away from inner oil seal and sealing lip so, thereby realizes dynamic seal (packing) initiatively.
The present invention compares with the conventional seals technology has following good effect and distinguishing feature:
1. the contact force of sealing lip and end face greatly reduces the friction of lip and end face much smaller than the power of holding tightly of conventional rotary shaft oil seal, thereby reduces excessive power drain, and improves emission standard, adapts to higher bad guaranteed request;
2. in encapsulating method of the present invention,, beating of axle and setting-up eccentricity are not required substantially, improve the oil sealing life-span, reduce the manufacturing of component and the purpose of assembly precision thereby reach because of being different from traditional radially lip seal.
Four, description of drawings
Below in conjunction with drawings and Examples invention is described in further detail.
Fig. 1 is a kind of concrete structure schematic representation of this method.
Fig. 2 is the planospiral distribution schematic diagram of a kind of inner oil seal seal face of the present invention.
Five, specific embodiments
Embodiment, a kind of high-speed engine shaft sealing method, be that the outer oil seal and the inner oil seal of split are combined, be pressed into motor cavity desired location by special tooling, outer oil seal is fixed in the cavity by external diameter and cavity interference, an and static seal function, inner oil seal is fixed on the axle by endoporus and running shaft interference, an and static seal function, the sealing lip of outer oil seal contacts with the seal face interference of inner oil seal, play the motive sealing function, the seal face of inner oil seal is provided with plane thread; During work, running shaft drives the inner oil seal rotation, plays main sealing function by planospiral centrifugal action; Sealing lip contacts with the interference of inner oil seal seal face and produces relative movement, and the design of sealing lip is soft, and is less relatively to the contact force of contact plane, plays static seal and auxiliary seal function; Plane thread is uniform, and from the inboard initial outside end that extends to of inner oil seal seal face, Hand of spiral is identical with the sense of rotation of axle, and helical has the certain shape and the degree of depth, and rotating speed is high more, and the oil return effect is good more.
In order to further specify the inventive method, the inventive method concrete application example in actual applications is with reference to Fig. 1, Fig. 2, be that outer oil seal 6 and inner oil seal 7 are pressed in the cavity by special tooling, outer oil seal 6 is fixed in the cavity by external diameter and cavity interference, outer wall presses with cavity and contacts, play the static seal function, inner oil seal 7 is fixed on the axle 8 by endoporus and running shaft interference, an and static seal function, the cross section of inner oil seal 7 is for L shaped, the bottom of rubber body 2 is provided with dust excluder lips 5, the dust excluder lips 5 of outer oil seal 6 is pressed the L shaped perpendicular wall of falling of inner oil seal 7, rubber body 2 tops be provided with sealing lip 3, sealing lip 3 contacts with falling of inner oil seal 7 L shaped cross wall interference and the lower surface of cross wall is processed with multi-head spiral line 10, the direction of helix 10 is identical with the sense of rotation of engine shaft 8, helix 10 can be many, helix 10 is 2 in the present embodiment, and the colloid 2 that falls between L shaped perpendicular wall of sealing lip 3 and inner oil seal 7 is provided with oil storage tank 4, leaves the gap between the top of outer oil seal 6 and inner oil seal 7.
The present invention protects the specific embodiment that provided not only is provided, and can put into practice the present invention by the structural approach different with aiming at the embodiment that sets forth usefulness, as long as this method does not exceed scope of the present invention.
The sealing lip of outer oil seal of the present invention contacts with the rotation surface of contact interference of inner oil seal, plays the motive sealing function, promptly when object is made uniform circular motion, a centripetal force is all arranged, direction is pointed to the center of circle, and according to Newton's second law, this centripetal force is F=ma, here, m is a material mass, and a is a centripetal acceleration, a=v2/r, v is a linear velocity, and r is a radius of a circle; Suddenly increase if make the linear velocity of the object of circular movement, and the suffered external force of object can't provide required centripetal force, then object will produce centrifugal motion, that is to say, object will break away from original running orbit, and fly to along the direction vertical with centripetal force.1: under static state, realize static seal by above-mentioned principle; 2: under the very low situation of axle rotating speed, because the adhesion on sealing medium (as oil) and inner oil seal surface produces centripetal force, at this moment, oily adhesion f is greater than mv2/r, and oil is still attached to inner oil seal and sealing lip surface.Because the elastic force that the magnitude of interference of sealing lip produces, oil can't pass through; 3: when rotating speed reaches a certain size, inner oil seal and sealing lip surface can't provide the enough big centripetal force of oil droplet, at this moment, the adhesion of oil is far smaller than mv2/r, impels oil droplet to produce centrifugal motion, leaves inner oil seal and sealing lip surface, like this, on the surface of inner oil seal and sealing lip, form a Wu You district, realize dynamic seal (packing) initiatively.Simultaneously, because sealing lip closely contacts with inner oil seal cross wall lower surface, assist the oil leakage effect that prevents.
The rotation surface of contact of inner oil seal is provided with plane thread, and the route that splashes of standard oil plays better sealing effect.
Claims (1)
1. high-speed engine shaft sealing method, it is characterized in that this method is in adopting, outer split type oil sealing, the endoporus of inner oil seal and engine shaft interference assembling, the external diameter of outer oil seal and cavity interference and be fixed in the cavity, the sealing lip of outer oil seal contacts with the seal face interference of inner oil seal, play the static seal function, the sealing lip of outer oil seal, the seal face of inner oil seal and the axis normal of running shaft, the seal face of inner oil seal is provided with the bull plane thread, contact with the interference of outer oil seal sealing lip, centrifugal action during by rotation, play the motive sealing function, bull plane thread on the seal face of inner oil seal is the initial outside end that extends to from the inboard, and its Hand of spiral is identical with the sense of rotation of axle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100420802A CN100398881C (en) | 2006-01-15 | 2006-01-15 | High-speed engine shaft sealing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100420802A CN100398881C (en) | 2006-01-15 | 2006-01-15 | High-speed engine shaft sealing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1804439A CN1804439A (en) | 2006-07-19 |
| CN100398881C true CN100398881C (en) | 2008-07-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100420802A Active CN100398881C (en) | 2006-01-15 | 2006-01-15 | High-speed engine shaft sealing method |
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| Country | Link |
|---|---|
| CN (1) | CN100398881C (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3888495A (en) * | 1972-06-09 | 1975-06-10 | Ehrhard Mayer | Dual-cooled slide ring seal |
| CN2050913U (en) * | 1989-04-24 | 1990-01-10 | 上海市化工装备研究所 | Seal unit for stopping motion of centrifugal machine |
| JPH05161840A (en) * | 1991-12-12 | 1993-06-29 | Kobe Steel Ltd | Shaft seal device of rotor of kneader |
| WO1995005699A1 (en) * | 1993-08-12 | 1995-02-23 | Kosei Nakamura | Shaft sealing device for an electric motor |
| CN2228158Y (en) * | 1995-09-20 | 1996-05-29 | 国家建筑材料工业局南京玻璃纤维研究设计院 | Rotation axis oil seal for vehicle |
| CN2541680Y (en) * | 2002-04-11 | 2003-03-26 | 青岛基珀密封工业有限公司 | Combined two-way reflux oil seal |
-
2006
- 2006-01-15 CN CNB2006100420802A patent/CN100398881C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3888495A (en) * | 1972-06-09 | 1975-06-10 | Ehrhard Mayer | Dual-cooled slide ring seal |
| CN2050913U (en) * | 1989-04-24 | 1990-01-10 | 上海市化工装备研究所 | Seal unit for stopping motion of centrifugal machine |
| JPH05161840A (en) * | 1991-12-12 | 1993-06-29 | Kobe Steel Ltd | Shaft seal device of rotor of kneader |
| WO1995005699A1 (en) * | 1993-08-12 | 1995-02-23 | Kosei Nakamura | Shaft sealing device for an electric motor |
| CN2228158Y (en) * | 1995-09-20 | 1996-05-29 | 国家建筑材料工业局南京玻璃纤维研究设计院 | Rotation axis oil seal for vehicle |
| CN2541680Y (en) * | 2002-04-11 | 2003-03-26 | 青岛基珀密封工业有限公司 | Combined two-way reflux oil seal |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1804439A (en) | 2006-07-19 |
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Owner name: LAIYANG QUANRUIXIANG PLASTIC PRODUCTS CO.,LTD. Free format text: FORMER OWNER: DU JIE Effective date: 20091030 |
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Effective date of registration: 20091030 Address after: Shandong Province, Yantai City, Laiyang City, Longmen Road No. 162 Laiyang spring plastic products Co. Patentee after: Laiyang Quan Ruixiang Plastics Co. Ltd. Address before: Shandong Province, Yantai City, Laiyang City, Longmen Road No. 162 Laiyang runfuxiang oil seal Co. Ltd. Patentee before: Du Jie |
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| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Yantai Runfuxiang Oil Seal Co., Ltd. Assignor: Laiyang Quan Ruixiang Plastics Co. Ltd. Contract record no.: 2011370000225 Denomination of invention: High-speed engine shaft sealing method Granted publication date: 20080702 License type: Exclusive License Open date: 20060719 Record date: 20110530 |
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Owner name: LAIYANG QUANRUIXIANG PLASTIC PRODUCT CO., LTD. Free format text: FORMER NAME: LAIYANG CHUANRUIXIANG PLASTIC PRODUCTS CO., LTD. |
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| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: 265200 Shandong city of Yantai province Laiyang city Longmen Road No. 162 Patentee after: Laiyang Quanruixiang Plastic Product Co., Ltd. Address before: 265200 Shandong city of Yantai province Laiyang city Longmen Road No. 162 Laiyang spring plastic products Co. Patentee before: Laiyang Quan Ruixiang Plastics Co. Ltd. |
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| DD01 | Delivery of document by public notice |
Addressee: Wang Shien Document name: Notification of Passing Examination on Formalities |
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| DD01 | Delivery of document by public notice | ||
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Owner name: YANTAI RUNFUXIANG OIL SEAL CO., LTD. Free format text: FORMER OWNER: LAIYANG QUANRUIXIANG PLASTIC PRODUCT CO., LTD. Effective date: 20140319 |
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| C41 | Transfer of patent application or patent right or utility model | ||
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Effective date of registration: 20140319 Address after: 265200 No. 587 West Longmen Road, Shandong, Laiyang Patentee after: Yantai Runfuxiang Oil Seal Co., Ltd. Address before: 265200 Shandong city of Yantai province Laiyang city Longmen Road No. 162 Patentee before: Laiyang Quanruixiang Plastic Product Co., Ltd. |
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