CN113236781B - Sealing ring with antifriction and heat dissipation structure on end face and machining method thereof - Google Patents
Sealing ring with antifriction and heat dissipation structure on end face and machining method thereof Download PDFInfo
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- CN113236781B CN113236781B CN202110407204.7A CN202110407204A CN113236781B CN 113236781 B CN113236781 B CN 113236781B CN 202110407204 A CN202110407204 A CN 202110407204A CN 113236781 B CN113236781 B CN 113236781B
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- groove
- sealing ring
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- stepped
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23C—MILLING
- B23C3/00—Milling particular work; Special milling operations; Machines therefor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
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Abstract
The invention discloses a sealing ring with an antifriction and heat dissipation structure on the end surface and a processing method thereof. Compared with a single structure, the composite structure of the dynamic and static pressure grooves and the radial through grooves has the functions of increasing fluid bearing, reducing friction reduction of direct contact of solids and reducing friction heat and power loss of rotary friction. The radial through groove actively leaks through the sealing medium, reduces the temperature of the end face of the shaft groove in contact with the end face of the sealing ring in the process of leakage of a small amount of sealing medium, takes away friction heat, has a good heat dissipation function, indirectly reduces the temperature of the sealing ring, and prevents the problems of creep deformation, thermal damage and the like caused by continuous temperature rise of the sealing ring. The antifriction heat dissipation structure adopts a stepped groove form, so that errors caused by the positioning precision of the z axis are avoided, and machining precision errors caused by the thermal deformation of the main shaft are reduced.
Description
Technical Field
The invention belongs to the technical field of dynamic sealing, and relates to a sealing ring applied to sealing a gap between a rotating shaft and a shaft hole of a shell, in particular to a rotating sealing ring applied to a hydraulic transmission system of a vehicle.
Background
With the gradual development of vehicle transmission devices towards high speed and power concentration, the working condition PV value is continuously improved, the sealing ring for sealing the gap between the rotating shaft and the shaft hole of the shell is easy to have the problems of serious abrasion, thermal deformation, large leakage rate and the like, and the sealing performance is reduced, the service life is shortened and even the sealing failure is caused.
In order to solve the problems, the friction heat of the sealing surface needs to be reduced through design and process means, the heat is reasonably dissipated, and the leakage rate is controlled. Chinese patent CN101070914, chinese patent CN101865289A, chinese patent CN101846143A, chinese patent CN1364987, chinese patent CN1415877, chinese patent CN207740464U, chinese patent CN105917151AD and the like adopt grooves of various shapes machined on the end face of the sealing ring, and utilize the dynamic pressure effect or static pressure bearing effect of fluid to improve the axial opening force, thereby reducing the contact friction between the sealing ring and the friction piece. The anti-friction function of the end face anti-friction functional structure can be fully exerted only by considering the groove type structure of technological constraint. In addition, the problem of thermal damage of the sealing ring cannot be completely solved by simply relying on the end face antifriction function, and the accumulation of friction heat can cause creep deformation of temperature sensitive materials such as high polymers and the like, influence the performance stability of the sealing ring, and even cause sealing failure.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a sealing ring with an anti-friction heat dissipation structure on an end face, which can control the service temperature of the sealing ring and easily ensure the machining precision, and a machining method thereof.
In order to achieve the purpose, the technical scheme of the invention is as follows: a kind of end has seal ring of the antifriction heat-dissipating structure, the said seal ring is mounted between main axis and body of the vehicle drive unit, and the seal ring locates in mounting groove of the main axis, used for the axial seal of the high-pressure sealing medium;
a plurality of stepped grooves are uniformly distributed on the end face of the sealing ring along the circumferential direction, a notch is arranged at one stepped groove, and a radial through groove is arranged between two adjacent stepped grooves; the axial depth of the bottoms of the two ends of the stepped groove is smaller than that of the middle groove, the bottom plane of the middle groove and the bottom planes of the two ends of the stepped groove are parallel to the end face of the sealing ring, the inner side surface of the middle groove of the stepped groove is communicated with the inner cylindrical surface of the sealing ring, and the distance between the outer side surface of the stepped groove and the outer cylindrical surface of the sealing ring is more than twice of the radial clearance between the rotating shaft and the shaft hole of the shell;
the stepped groove and the radial through groove form an antifriction and heat dissipation structure.
Further, the notch is a lap joint type notch.
Further, the stepped groove is symmetrical about a radial center line.
Further, the stepped groove is provided with a plurality of stepped planes from one end of the groove to the groove bottom of the radial center line, the axial depth of the stepped planes is increased from one end of the groove to the radial center line in a gradient manner, namely the axial depth of the groove bottom plane close to the groove end is the smallest, and the axial depth of the groove bottom plane at the radial center is the largest.
Furthermore, the stepped groove is a circumferential groove, and the circle center of the circumferential groove is located on the central line of the sealing ring.
Furthermore, the maximum depth of the stepped groove is less than 1/3 of the axial thickness of the sealing ring, and the length of the stepped groove is more than twice of the width; the width of the radial through groove is smaller than 1/3 of the radial width of the sealing ring.
A processing method of a sealing ring with an antifriction heat dissipation structure on the end face comprises the following steps:
A. processing the antifriction heat dissipation structure of the end face of the sealing ring by adopting a milling process, fixing a sealing ring blank with the inner and outer circle diameters of the design size and the axial thickness of more than 0.1mm on a workpiece table of a numerical control milling machine, and milling the end face into a plane;
and according to different depths of different positions of the end face antifriction heat dissipation structure, processing step by step from shallow to deep, keeping the Z axis of the milling machine fixed in each step, finishing all structures with the same depth, and then feeding the Z axis to the next depth value until finishing processing the deepest part structures of the step groove and the radial through groove. The z-axis direction is parallel to the central axis of the sealing ring.
Compared with the prior art, the invention has the following beneficial effects:
1. compared with a single structure, the composite structure of the dynamic and static pressure grooves and the radial through grooves has the functions of increasing fluid bearing, reducing friction reduction of direct contact of solids and reducing friction heat and power loss of rotary friction. However, the heat accumulation of friction heat, which is inevitable simply due to friction reduction, may cause creep and thermal damage of the polymer seal ring material under high-pressure and high-speed service conditions, and therefore, heat dissipation measures are required. The radial through groove actively leaks through the sealing medium, reduces the temperature of the end face of the shaft groove in contact with the end face of the sealing ring in the process of leakage of a small amount of sealing medium, takes away friction heat, has a good heat dissipation function, indirectly reduces the temperature of the sealing ring, and prevents the problems of creep deformation, thermal damage and the like caused by continuous temperature rise of the sealing ring.
2. The dynamic pressure effect of a shallow groove area in the axial stepped groove of the sealing ring is very sensitive to the processing precision, and the poor consistency of the processing precision causes the uneven dynamic pressure opening force, thereby influencing the normal work of the sealing ring. The antifriction heat dissipation structure adopts a stepped groove form, high-precision machining is easier to realize compared with a wedge-shaped groove, the Z-axis is kept fixed by adopting a depth step-by-step machining method at the stage of machining a shallow groove area, and one-step machining is completed, so that errors caused by the positioning precision of the Z-axis are avoided, and machining precision errors caused by the thermal deformation of a main shaft are reduced.
Drawings
FIG. 1 is a front view of a rotary seal ring of the present invention.
Fig. 2 is a cross-sectional view of the stepped slots and radial through slots of fig. 1.
Fig. 3 is a schematic view of a seal ring fitting position.
In the figure: 1. the ladder groove, 2, radial logical groove, 3, incision, 4, sealing ring, 5, main shaft, 6, casing, 7, mounting groove.
Detailed Description
The invention is further described below with reference to the accompanying drawings. As shown in fig. 1-3, a seal ring with an antifriction and heat dissipation structure on the end surface is provided, the seal ring 4 is installed between a main shaft 5 and a shell 6 of a vehicle transmission device, and the seal ring 4 is positioned in an installation groove 7 of the main shaft 5 and is used for axial sealing of high-pressure sealing medium;
a plurality of stepped grooves 1 are uniformly distributed on the end face of the sealing ring 4 along the circumferential direction, a notch 3 is arranged at the position of one stepped groove 1, and a radial through groove 2 is arranged between two adjacent stepped grooves 1; the axial depth of the bottoms of the two ends of the stepped groove 1 is smaller than that of the middle groove, the bottom plane of the middle groove of the stepped groove 1 and the bottom planes of the two ends of the groove are parallel to the end surface of the sealing ring 4, the inner side surface of the middle groove of the stepped groove 1 is communicated with the inner cylindrical surface of the sealing ring 4, and the distance between the outer side surface of the stepped groove 1 and the outer cylindrical surface of the sealing ring 4 is more than twice of the radial clearance between the rotating shaft and the shaft hole of the shell 6;
the stepped groove 1 and the radial through groove 2 form an antifriction and heat dissipation structure.
Further, the notch 3 is a lap-joint notch 3.
Further, the stepped groove 1 is symmetrical about a radial center line.
Further, the stepped groove 1 has a plurality of stepped planes from one end of the groove to the groove bottom of the radial center line, and the axial depth of the stepped planes increases from one end of the groove to the radial center line in a gradient manner, that is, the axial depth of the groove bottom plane near the groove end is the smallest, and the axial depth of the groove bottom plane at the radial center is the largest.
Further, the stepped groove 1 is a circumferential groove, and the center of the circumferential groove is located on the center line of the sealing ring 4.
Further, the maximum depth of the stepped groove 1 is less than 1/3 of the axial thickness of the sealing ring 4, and the length of the stepped groove 1 is more than twice of the width; the width of the radial through groove 2 is smaller than 1/3 of the radial width of the sealing ring 4.
A processing method of a sealing ring with an antifriction heat dissipation structure on the end face comprises the following steps:
B. machining an antifriction and heat dissipation structure on the end face of the sealing ring 4 by adopting a milling process, fixing a blank of the sealing ring 4 with the inner and outer circle diameters of the design size and the axial thickness of more than 0.1mm of the design thickness on a workpiece table of a numerical control milling machine, and milling the end face into a plane;
C. according to different depths of different positions of the end face antifriction heat dissipation structure, processing is carried out step by step from shallow to deep, the milling machine z-axis is kept fixed in each step, all structures with the same depth are processed, then the z-axis is fed to the next depth value until the deepest part structures of the step groove 1 and the radial through groove 2 are processed; the z-axis direction is parallel to the central axis of the sealing ring 4.
The present invention is not limited to the embodiment, and any equivalent idea or change within the technical scope of the present invention is to be regarded as the protection scope of the present invention.
Claims (6)
1. A sealing ring with an antifriction and heat dissipation structure on the end face is characterized in that the sealing ring (4) is installed between a main shaft (5) and a shell (6) of a vehicle transmission device, and the sealing ring (4) is located in an installation groove (7) of the main shaft (5) and used for axial sealing of a high-pressure sealing medium;
a plurality of stepped grooves (1) are uniformly distributed on the end face of the sealing ring (4) along the circumferential direction, and a notch (3) is arranged at the position of one stepped groove (1);
the method is characterized in that: a radial through groove (2) is arranged between two adjacent stepped grooves (1); the axial depth of the bottoms of the two ends of the stepped groove (1) is smaller than that of the middle groove bottom, the middle groove bottom plane and the bottom planes of the two ends of the stepped groove (1) are parallel to the end surface of the sealing ring (4), the inner side surface of the middle groove of the stepped groove (1) is communicated with the inner cylindrical surface of the sealing ring (4), and the distance between the outer side surface of the stepped groove (1) and the outer cylindrical surface of the sealing ring (4) is more than twice of the radial clearance between the rotating shaft and the shaft hole of the shell (6);
the stepped groove (1) and the radial through groove (2) form an antifriction heat dissipation structure;
the maximum depth of the stepped groove (1) is less than 1/3 of the axial thickness of the sealing ring (4), and the length of the stepped groove (1) is more than twice of the width; the width of the radial through groove (2) is smaller than 1/3 of the radial width of the sealing ring (4).
2. A seal ring having an end face with a friction-reducing heat-dissipating structure according to claim 1, wherein: the notch (3) is a lap joint type notch (3).
3. A seal ring having an end face with a friction-reducing heat-dissipating structure according to claim 1, wherein: the stepped groove (1) is symmetrical about a radial central line.
4. A seal ring having an end face with a friction-reducing heat-dissipating structure according to claim 3, wherein: the step groove (1) is provided with a plurality of step planes from one end of the groove to the groove bottom of the radial central line, the axial depth of the step planes is deepened from one end of the groove to the radial central line in a gradient manner, namely the axial depth of the groove bottom plane close to the groove end is the minimum, and the axial depth of the groove bottom plane at the radial center is the maximum.
5. A seal ring having an end face with a friction-reducing heat-dissipating structure according to claim 1, wherein: the stepped groove (1) is a circumferential groove, and the circle center of the circumferential groove is located on the central line of the sealing ring (4).
6. A method for manufacturing a seal ring having an anti-friction heat dissipating structure on an end surface according to claim 1, comprising: the method comprises the following steps:
A. machining an antifriction and heat dissipation structure on the end face of the sealing ring (4) by adopting a milling process, fixing a blank of the sealing ring (4) with the inner and outer circle diameters of the design size and the axial thickness of more than 0.1mm of the design thickness on a workpiece table of a numerical control milling machine, and milling the end face into a plane;
B. according to different depths of different positions of the end face antifriction heat dissipation structure, processing is carried out step by step from shallow to deep, the milling machine z-axis is kept fixed in each step, all structures with the same depth are processed, then the z-axis is fed to the next depth value, and the deepest part structures of the stepped groove (1) and the radial through groove (2) are processed; the z-axis direction is parallel to the central axis of the sealing ring (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110407204.7A CN113236781B (en) | 2021-04-15 | 2021-04-15 | Sealing ring with antifriction and heat dissipation structure on end face and machining method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110407204.7A CN113236781B (en) | 2021-04-15 | 2021-04-15 | Sealing ring with antifriction and heat dissipation structure on end face and machining method thereof |
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| Publication Number | Publication Date |
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| CN113236781A CN113236781A (en) | 2021-08-10 |
| CN113236781B true CN113236781B (en) | 2022-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110407204.7A Active CN113236781B (en) | 2021-04-15 | 2021-04-15 | Sealing ring with antifriction and heat dissipation structure on end face and machining method thereof |
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| JP2005003141A (en) * | 2003-06-13 | 2005-01-06 | Eagle Ind Co Ltd | Cylindrical surface seal |
| CN201598528U (en) * | 2009-04-29 | 2010-10-06 | 镇江中福马机械有限公司 | Belt type spiral combined end surface mechanical sealing device of disc grinder |
| AU2015344384A1 (en) * | 2014-11-08 | 2017-04-27 | Eagle Industry Co., Ltd. | Sliding parts |
| CN107110202A (en) * | 2014-12-22 | 2017-08-29 | 伊格尔工业股份有限公司 | Sliding bearing and pump |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| AT411092B (en) * | 2000-09-15 | 2003-09-25 | Gittler Philipp Dipl Ing Dr Te | SEALING THE WHEEL OF HYDRAULIC TURBO MACHINES |
| JP5194647B2 (en) * | 2007-08-31 | 2013-05-08 | Ｎｏｋ株式会社 | Seal ring |
| JP2009293753A (en) * | 2008-06-09 | 2009-12-17 | Nok Corp | Seal ring and seal structure having the same |
| CN105276196A (en) * | 2014-07-26 | 2016-01-27 | 高洪洋 | Fluid movable seal lubricating device |
| CN204828643U (en) * | 2015-07-27 | 2015-12-02 | 谢桥甫 | Novel piston ring |
| CN108291647B (en) * | 2015-12-03 | 2019-08-30 | Nok株式会社 | Axis and seal construction |
| CN107975600A (en) * | 2017-11-23 | 2018-05-01 | 西安航天动力研究所 | A kind of self forcing cooling refractory machinery seals device |
| US11293553B2 (en) * | 2018-05-17 | 2022-04-05 | Eagle Industry Co., Ltd. | Seal ring |
| CN208919328U (en) * | 2018-09-28 | 2019-05-31 | 安徽安密机械密封有限公司 | A kind of inside has the shell-shaped mechanical seal ring of sector deep groove |
| CN111075878A (en) * | 2020-01-09 | 2020-04-28 | 大连理工大学 | End surface stepped groove rotary sealing ring |
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2021
- 2021-04-15 CN CN202110407204.7A patent/CN113236781B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005003141A (en) * | 2003-06-13 | 2005-01-06 | Eagle Ind Co Ltd | Cylindrical surface seal |
| CN201598528U (en) * | 2009-04-29 | 2010-10-06 | 镇江中福马机械有限公司 | Belt type spiral combined end surface mechanical sealing device of disc grinder |
| AU2015344384A1 (en) * | 2014-11-08 | 2017-04-27 | Eagle Industry Co., Ltd. | Sliding parts |
| CN107110202A (en) * | 2014-12-22 | 2017-08-29 | 伊格尔工业股份有限公司 | Sliding bearing and pump |
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| CN113236781A (en) | 2021-08-10 |
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