CN217683237U - Bidirectional high-speed rotary seal with flow guide micro-lip - Google Patents
Bidirectional high-speed rotary seal with flow guide micro-lip Download PDFInfo
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- CN217683237U CN217683237U CN202221781140.3U CN202221781140U CN217683237U CN 217683237 U CN217683237 U CN 217683237U CN 202221781140 U CN202221781140 U CN 202221781140U CN 217683237 U CN217683237 U CN 217683237U
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Abstract
The utility model belongs to the technical field of it is sealed, relate to the rotary seal technique, in particular to take two-way high-speed rotary seal of little lip of water conservancy diversion. The splayed return line is designed on the main sealing lip to realize oil pumping return, the oil return is strengthened in cooperation with the main sealing lip through the flow guide micro lip to weaken the outward flowing of lubricating oil, so that the adaptability to the ultra high speed is improved, a gap is reserved between the micro lip and the sealing surface piece of the shaft, the mechanical friction between the micro lip and the sealing surface piece is avoided, and the spring has the function of compensating the radial force during long-term application. The utility model discloses lip structural design is compact, can satisfy the effective sealing of long term, effectively improves the life of sealed goods.
Description
Technical Field
The utility model belongs to the technical field of it is sealed, relate to the rotary seal technique, in particular to take two-way high-speed rotary seal of little lip of water conservancy diversion.
Background
The rotation axis oil blanket generally includes flexible rubber lip, skeleton and spring, flexible rubber lip and sealed axle interference fit, and the spring provides and stabilizes radial power, and the sealed lip produces the power of hugging closely to the rotation axis to prevent that the fluid from revealing, the oil blanket that has vice lip can also prevent that outside dust from invading. The oil seal is provided with a metal framework and used for stabilizing and fastening a sealing element, and the oil seal plays an important role in the working reliability of an equipment sealing system.
The sealing with the rotational linear speed of more than 25m/s belongs to ultra-high-speed sealing, and the difficulty of bidirectional high-speed sealing is increased. The rubber oil seal is optimized and improved through structural parameters, such as the length of a lip is shortened, the thickness of a waist is optimized, a backflow line is designed, the holding force of a spring is reduced, and the like, meanwhile, the friction is reduced to realize long-term high-speed sealing, and generally, the bidirectional sealing is not higher than 20m/s; the polytetrafluoroethylene one-way spiral sealing can reach 50-60 m/s, but cannot resist inversion, and cannot exert the high-speed advantage.
The conventional bidirectional high-speed rotation oil seal generally improves the following performance of a product under the high-speed rotation working condition by reducing the thickness of the waist part of the oil seal or increasing the length of the waist part and the like, and the lip is additionally provided with a bidirectional return line to improve the adaptability of the product under the high-speed rotation condition in a power return mode.
Patent 202011223684.3 has proposed a two-way rotary seal high speed oil blanket, is close to the sealed muscle equipartition of oil side and is two-way return line, is close to outside air side design annular seal muscle, can satisfy two-way seal, and the sealing lip is epaxial to form the contact surface of certain width in the during operation, and the sealing lip is the pure preparation of gluing, and the lip position is in the radial force of long-time work back progressively decline, can not ensure two-way high speed later stage effective seal.
SUMMERY OF THE UTILITY MODEL
The utility model discloses, to prior art not enough, provide a take two-way high-speed rotary seal of little lip of water conservancy diversion, through realizing pumping the oil return at sealed main lip design splayed return line, strengthen the oil return in coordination with sealed main lip through the little lip of water conservancy diversion and weaken the outside flow of lubricating oil to promote the adaptability to the hypervelocity, the sealed face part of little lip and axle leaves the clearance, avoids mechanical friction between them, radial force compensation effect when the spring plays long term application. The utility model discloses lip structural design is compact, can satisfy the effective sealing of long term, effectively improves the life of sealed goods.
The utility model aims at realizing like this, a take two-way high-speed rotary seal of water conservancy diversion lip a little, its structure includes: the oil seal structure comprises a main seal lip, a spring, an oil seal inner framework and a flow guide micro lip arranged on the outer side (far away from an oil side) of the main seal lip, wherein the flow guide micro lip is a discontinuous wave-shaped bulge or a continuous arc-shaped bulge with an oil guide surface.
Preferably, the main sealing lip is in a splayed streamline shape.
More preferably, the flow guide micro-lip wave-shaped protrusion is arranged at the position corresponding to the splayed opening of the splayed return line.
Preferably, when the air guide device is assembled and used, the main sealing lip is in interference fit with the rotating shaft, and the flow guide micro lip is in clearance fit with the rotating shaft.
Preferably, the main seal lip and the flow guide micro lip are positioned on the oil side of the main seal lip and the flow guide micro lip relative to the spring.
Take two-way high-speed rotary seal sealing material of water conservancy diversion lip a little be high elasticity rubber material, the oil blanket inner frame material is 45# steel or similar material, the spring adopts the thin spring of stainless steel.
Take two-way high-speed rotary seal of little lip of water conservancy diversion, wherein the setting of the little lip of water conservancy diversion especially makes two-way high-speed sealing strong adaptability, sealing reliability is good, long service life. The sealing device is suitable for bidirectional high-speed rotary sealing occasions, is particularly suitable for high-speed rotary sealing of the motor, and is suitable for reliable sealing under bidirectional and high-speed-40 m/s severe working conditions.
Drawings
FIG. 1 is a schematic view of the overall structure of the high-speed rotating oil seal of the utility model;
FIG. 2 is a schematic view of a first embodiment of the flow directing lips of the present invention;
FIG. 3 is a schematic view of a second embodiment of the flow directing lip;
wherein, 1 is a seal main lip, 2 is a diversion micro lip, 2-1 is a wave-shaped bulge, 2-2 is an arc-shaped bulge, 3 is a spring, and 4 is an oil seal inner framework.
Detailed Description
The foregoing and other aspects of the present invention will be apparent from, and elucidated with reference to, the embodiments described hereinafter, without any limitation to the scope of the present invention. All the technologies realized based on the above contents of the present invention all belong to the scope of the present invention. Except as otherwise noted, the following examples were carried out using conventional techniques.
Example 1
A bidirectional high-speed rotary seal with a flow guide micro-lip is structurally shown in figure 1:
the structure includes: the oil seal structure comprises a main seal lip 1, a spring 3, an oil seal inner framework 4 and a flow guide micro lip 2 arranged on the outer side (far away from the oil side) of the main seal lip 1.
The specification of the oil seal is phi 75-100-10, the lip mouth is designed as shown in figure 2, a main seal lip 1 is a splayed return line, the height of the return line is 0.1mm, 8 groups are provided, 16 return lines are arranged in each group, the angle of the return line is 20 degrees, the interference between the main seal lip 1 and a rotating shaft is 1.2mm, a discontinuous wave-shaped bulge 2-1 of a flow guide micro lip 2 is arranged at the position corresponding to a splayed opening of the splayed return line, and the gap between the flow guide micro lip 2 and the rotating shaft is 0.15mm.
The sealing element has no leakage after 240h of test examination under the conditions of 0.01MPa of sealing pressure and 40m/s of rotating speed.
Example 2
A bidirectional high-speed rotary seal with a flow guide micro-lip is structurally shown in figure 1:
the structure includes: the oil seal structure comprises a main seal lip 1, a spring 3, an oil seal inner framework 4 and a flow guide micro lip 2 arranged on the outer side (far away from the oil side) of the main seal lip 1.
The specification of the oil seal is phi 50-70-8, the lip mouth is designed as shown in figure 2, the main seal lip 1 is in a splayed streamline shape, the height of a backflow line is 0.1mm, 6 groups are provided, each group is provided with 14 backflow lines, the angle of the backflow line is 25 degrees, and the interference magnitude between the main seal lip 1 and a rotating shaft is 0.8mm; the diversion tiny lip 2 is a discontinuous wave-shaped bulge 2-1, the wave-shaped bulge 2-1 is arranged at the position corresponding to the splayed opening of the splayed return line, and the clearance between the diversion tiny lip 2 and the rotating shaft is 0.12mm.
The sealing element has no leakage after 240h of test examination under the conditions of 0.01MPa of sealing pressure and 35m/s of rotating speed.
Example 3
A bidirectional high-speed rotary seal with a flow guide micro-lip is structurally shown in figure 1:
the structure includes: the oil seal structure comprises a main seal lip 1, a spring 3, an oil seal inner framework 4 and a flow guide micro lip 2 arranged on the outer side (far away from the oil side) of the main seal lip 1.
The specification of the oil seal is phi 35-52-7, the lip mouth is designed as shown in figure 3, the main seal lip 1 is in a splayed streamline shape, the height of a backflow line is 0.1mm, 6 groups are provided, 12 backflow lines are arranged in each group, the angle of the backflow line is 20 degrees, and the interference magnitude between the main seal lip 1 and a rotating shaft is 0.6mm; the diversion tiny lip 2 is a continuous arc-shaped bulge 2-2, and the clearance between the diversion tiny lip 2 and the rotating shaft is 0.1mm.
The sealing element has no leakage after 240h of test examination under the conditions of 0.01MPa of sealing pressure and 30m/s of rotating speed.
Comparative example 1
Set up its structure of oil blanket and include: the seal structure comprises a seal main lip 1, a spring 3 and an oil seal inner framework 4.
The specification of the oil seal is phi 50-70-8, the lip mouth is designed in a way that a main seal lip 1 is in a splayed streamline shape, the height of a backflow line is 0.1mm, 6 groups are provided, each group is provided with 14 backflow lines, the angle of the backflow line is 25 degrees, and the interference magnitude between the main seal lip 1 and a shaft is 0.8mm; without the diversion lips 2.
The sealing element is tested and examined under the sealing pressure of 0.01MPa and 240h, and the leakage occurs at the speed of more than 20 m/s.
Claims (5)
1. The utility model provides a take two-way high-speed rotary seal of water conservancy diversion lip a little, its structure includes: seal owner lip (1), spring (3), oil blanket inner frame (4), its characterized in that: the oil guide structure is characterized by further comprising a flow guide micro lip (2) arranged on the outer side of the seal main lip (1), wherein the flow guide micro lip (2) is a discontinuous wave-shaped bulge (2-1) or a continuous arc-shaped bulge (2-2) with an oil guide surface.
2. The bidirectional high-speed rotary seal with the guide lips according to claim 1, characterized in that the main seal lip (1) is in a splayed streamline shape.
3. The bidirectional high-speed rotary seal with the guide lips as claimed in claim 2, wherein the wave-shaped protrusions (2-1) of the guide lips (2) are arranged at the corresponding positions of the splayed openings of the splayed return line.
4. The bidirectional high-speed rotary seal with the guide lips according to claim 1, wherein the seal main lip (1) is in interference fit with the rotary shaft and the guide lips (2) are in clearance fit with the rotary shaft during assembly and use.
5. The bidirectional high-speed rotary seal with the guide micro-lip as claimed in claim 1, wherein the seal main lip (1) and the guide micro-lip (2) are located on the oil side of the seal relative to the position of the spring (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221781140.3U CN217683237U (en) | 2022-07-11 | 2022-07-11 | Bidirectional high-speed rotary seal with flow guide micro-lip |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221781140.3U CN217683237U (en) | 2022-07-11 | 2022-07-11 | Bidirectional high-speed rotary seal with flow guide micro-lip |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217683237U true CN217683237U (en) | 2022-10-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221781140.3U Active CN217683237U (en) | 2022-07-11 | 2022-07-11 | Bidirectional high-speed rotary seal with flow guide micro-lip |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217683237U (en) |
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2022
- 2022-07-11 CN CN202221781140.3U patent/CN217683237U/en active Active
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