CN219954221U - Sealing ring, rotary sealing structure and laser equipment - Google Patents

Abstract

The utility model discloses a sealing ring, a rotary sealing structure and laser equipment, wherein the sealing ring comprises a ring body and an annular sealing lip which is arranged on one side of the ring body and is close to the inner wall of the ring body; the ring body is arranged in a hollow mode to form a heat dissipation channel, and a heat dissipation hole communicated with the heat dissipation channel is formed in the ring body; the inner diameter of the annular sealing lip, which is far away from the end part of the ring body, is smaller than the inner diameter of the ring body, and the inner wall of the annular sealing ring is provided with a taper. Through setting up the sealing washer cavity, make the sealing washer can inwards compress when the installation, avoid the excessive compression. The inside of annular seal lip sets up the area of contact that certain tapering can reduce with the pivot, avoids the sealing washer friction overheated, produces the sealing washer simultaneously and still accessible louvre discharge because of the heat that friction produced to promote the radiating effect. The problem of the sealing washer high temperature inefficacy because of the compression volume is too big in the rotation seal is solved.

Description

Sealing ring, rotary sealing structure and laser equipment

Technical Field

The utility model relates to the field of sealing, in particular to a sealing ring, a rotary sealing structure and laser equipment.

Background

The sealing ring is mainly used for sealing between structural members and is suitable for static sealing and rotary sealing. Mainly made of high polymer materials such as rubber and the like. In the related art, in order to ensure the tightness of the rotary sealing structure, the compression amount of the sealing ring is generally increased, and the excessive compression amount of the sealing ring often causes the sealing ring material to lose elasticity and lose sealing effect after a period of time. In particular, in rotary seal applications, the amount of compression is excessive, the extrusion friction against the rotary shaft is excessive, causing excessive driving resistance, and thus high temperature of the rotary seal, causing chipping of the seal ring, rubber aging, and eventually seal failure. Once the poor sealing fails, the stability of precision devices such as lasers and the like can be irreversibly affected.

Disclosure of Invention

The utility model provides a sealing ring, a rotary sealing structure and laser equipment, and aims to solve the problem that the sealing ring fails due to overlarge compression amount in rotary sealing.

In one aspect, the present utility model provides a sealing ring, including:

the ring body is internally provided with a heat dissipation channel in a hollow way, and the ring body is provided with a heat dissipation hole communicated with the heat dissipation channel;

the annular sealing lip is arranged on one side of the ring body and comprises a connecting part connected with the ring body and a sealing part far away from the ring body, and the inner diameter of the sealing part is smaller than that of the ring body.

In some embodiments, the inner wall of the annular sealing lip is tapered, and the thickness of the connecting portion is greater than the thickness of the sealing portion.

In some embodiments, the seal ring has a shore hardness in the range of 98-102.

In some embodiments, the material of the sealing ring comprises POM, nylon or teflon.

In some embodiments, the cross-sectional hole of the heat dissipation channel is a long strip hole, and the length direction of the long strip hole is along the radial direction of the ring body.

On the other hand, the utility model also provides a rotary sealing structure which comprises the sealing ring.

In some embodiments, the rotary sealing structure further comprises a pressing plate, a mounting piece and a rotating shaft, wherein the mounting piece and the rotating shaft are connected in a rotating mode, and a first through hole for the rotating shaft to pass through is formed in the pressing plate; the sealing ring is clamped by the pressing plate and the mounting piece and sleeved on the periphery of the rotating shaft.

In some embodiments, a limiting protrusion is disposed on a surface of the pressing plate facing the sealing ring, and the limiting protrusion is disposed around the periphery of the first via hole and is used for abutting against the periphery of the sealing ring; the first via is flared toward one side of the seal ring to accommodate the annular sealing lip.

In some embodiments, the rotary seal structure further includes a cooling assembly in communication with the heat dissipation channel for inputting a cooling medium into the heat dissipation channel.

In some embodiments, the sealing ring has a width W1, and the distance between the inner wall of the first via hole and the periphery of the rotating shaft is W2, where W1 is 4-6 times of W2.

In some embodiments, the rotary seal structure further comprises a box disposed on one side of the mounting member, the box and the mounting member are configured with a seal cavity, and one end of the rotating shaft is located in the seal cavity.

In some embodiments, the coefficient of friction between the annular sealing lip and the spindle is less than 0.5.

On the other hand, the utility model also provides laser equipment which comprises the rotary sealing structure.

In the utility model, the sealing ring comprises a ring body and an annular sealing lip which is arranged on one side of the ring body and is close to the inner wall of the ring body; the ring body is arranged in a hollow mode to form a heat dissipation channel, and a heat dissipation hole communicated with the heat dissipation channel is formed in the ring body; the inner diameter of the annular sealing lip, which is far away from the end part of the ring body, is smaller than the inner diameter of the ring body, and the inner wall of the annular sealing ring is provided with a taper. Through setting up the sealing washer cavity, make the sealing washer can inwards compress when the installation, avoid the excessive compression. The inside of annular seal lip sets up the area of contact that certain tapering can reduce with the pivot, avoids the sealing washer friction overheated, produces the sealing washer simultaneously and still accessible louvre discharge because of the heat that friction produced to promote the radiating effect. The problem of the sealing washer high temperature inefficacy because of the compression volume is too big in the rotation seal is solved.

Drawings

FIG. 1 is a schematic view of a rotary seal structure according to an embodiment of the present utility model;

FIG. 2 is an enlarged view of embodiment A of FIG. 1;

FIG. 3 is an enlarged view of embodiment B of FIG. 2;

FIG. 4 is a schematic view of a seal ring according to an embodiment of the utility model;

FIG. 5 is a cross-sectional view of the seal ring of the embodiment of FIG. 4;

fig. 6 is a schematic structural view of a rotary seal structure according to another embodiment of the present utility model.

Description of the reference numerals:

10. a ring body; 11. a heat radiation hole; 11a, a first conveying pipe; 11b, a second conveying pipeline; 12. a heat dissipation channel; 13. an annular sealing lip; 13a, a sealing part; 13b, a connection part; 20. a mounting member; 30. a rotating shaft; 40. a pressing plate; 41. a second via; 42. a limit protrusion;

the achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made more clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that all directional indications such as up, down, left, right, front, and rear … … in the embodiments of the present utility model are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture such as that shown in the drawings, and if the particular posture is changed, the directional indication is changed accordingly.

It will also be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.

Furthermore, the description of "first," "second," etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

An embodiment of the present utility model proposes a seal ring, referring to fig. 1 to 5, including:

the ring body 10 is internally provided with a heat dissipation channel 12 in a hollow way, and the ring body 10 is provided with a heat dissipation hole 11 communicated with the heat dissipation channel 12;

an annular seal lip 13 provided on one side of the ring body 10 and including a connection portion 13b connected to the ring body 10 and a seal portion 13a remote from the ring body 10, the seal portion 13a having an inner diameter smaller than that of the ring body 10.

In the embodiment of the present utility model, the sealing ring includes a ring body 10 and an annular sealing lip 13 disposed at one side of the ring body 10, which may be integrally disposed. One end of the annular sealing lip 13 is arranged on the ring body 10, the other end extends towards the center, and a certain included angle is kept between the extending direction and the central axis of the ring body 10. The annular seal lip 13 includes a connecting portion 13b connected to the ring body 10, and an outwardly extending seal portion 13a. Under the working condition of the sealing ring, the inner wall of the sealing part 13 is attached to the outer wall of the rotating shaft, so that the rotary sealing function is achieved. The ring body 10 is annular and is hollow to form a heat dissipation channel 12 in the sealing ring body. The cross-sectional hole of the heat dissipation channel 12 is a long hole, and the length direction of the long hole is along the radial direction of the ring body 10. The ring body 10 is provided with a heat radiation hole 11 communicating with the heat radiation passage 12. The heat dissipation holes 11 are arranged near the inner edge of the sealing ring so as to avoid being blocked by parts on two sides of the sealing ring during installation, and the parts can be end covers which are covered on the sealing ring. The heat dissipation holes 11 may be provided separately from the annular seal lip 13 on both sides of the ring body 10, and the positions of both may not be limited here. The number of the heat dissipation holes 11 on the ring body 10 is not limited, and specifically 2 to 4 heat dissipation holes can be arranged and can be arranged in a central symmetry manner. The inner diameter of the annular seal lip 13 away from the seal portion 13a of the ring body 10 is smaller than the inner diameter of the ring body 10. The hollow structure of the ring body 10 has higher structural strength than the solid structure. Meanwhile, the hollow sealing ring has a certain inward deformation space, and can be compressed inwards during installation, so that the rebound effect is prevented from being influenced by excessive compression.

In the embodiment of the present utility model, referring to fig. 5, the inner wall of the annular sealing lip 13 has a taper, and the thickness of the connecting portion 13b is greater than the thickness of the sealing portion 13a. The annular seal lip 13 has a triangular cross section and is provided so as to be narrower in a direction from the connecting portion 13b toward the seal portion 13a. And the inner wall of the annular sealing ring is provided with taper. The connecting portion 13b of the annular seal lip 13 engages with the inner wall of the ring body 10 to form a complete wall surface. The wall surface is provided with a certain taper, so that the contact area with the rotating shaft can be reduced, and the friction overheating of the sealing ring is avoided. And the taper range is that heat generated by friction of the sealing ring can be discharged through the heat dissipation holes 11, so that the heat dissipation effect is improved. The problem of the sealing washer high temperature inefficacy because of the compression volume is too big in the rotation seal is solved. In addition, the thickness of the connecting portion 13b being greater than that of the sealing portion 13a ensures the connection strength of the annular sealing lip 13 with the ring body 10.

In the embodiment of the present utility model, referring to fig. 2, the sealing ring has a shore hardness ranging from 98 to 102. After the sealing ring is matched with the rotating shaft 30, the rotating shaft 30 rotates at the initial stage of starting, and the friction force between the sealing ring and the rotating shaft enables the inner ring material and the outer ring material of the sealing ring to be twisted and torn relatively. The sealing ring is made of high-hardness materials, and can adapt to the working conditions of frequent rotation starting or frequent reversing rotation and alternating acceleration rotation. Because of the increased hardness of the material and the hollow structure, the strength and rigidity of the sealing ring are improved compared with those of the traditional materials such as fluororubber, and the sealing shape is easier to maintain in order to maintain the sealing stability in the process of rotating and tearing the inner ring and the outer ring.

In the embodiment of the present utility model, referring to fig. 2 and 5, the sealing ring may be made of POM, nylon or teflon. In this embodiment, the sealing ring may be made of a polymer material, specifically POM, nylon and teflon, so as to improve the overall strength of the sealing ring, and meanwhile, the material has a self-lubricating property, and the friction coefficient between the annular sealing lip 13 and the rotating shaft 30 is less than 0.5. Friction with the rotating shaft 30 can be reduced, and overheating of the sealing ring can be avoided.

The embodiment of the utility model also provides a rotary sealing structure, and referring to fig. 1 to 4, the rotary sealing structure comprises the sealing ring. The rotary sealing structure can further comprise a pressing plate 40, a mounting piece 20 and a rotating shaft 30 which are connected in a rotary way, wherein the pressing plate 40 can be mounted on the mounting piece 20 through screws, and a first through hole for the rotating shaft 30 to pass through is formed in the pressing plate 40; the seal ring is clamped by the pressing plate 40 and the mounting member 20 and is sleeved on the periphery of the rotating shaft 30. The arrangement of the annular sealing lip 13 increases the dust-proof capability, and even if sundry dust falls on the annular sealing lip 13, the sundry dust is not easy to enter between the annular sealing lip 13 and the rotating shaft 30. The annular sealing lip 13 is not extruded in installation, and the rotating shaft 30 is sealed by means of elastic tension of the sealing ring self material in the installation process. This sealing achieves a seal along the radial direction of the shaft 30. By pressing the sealing rings by the pressing plate 40, not only good sealing effect is formed on the upper surface and the lower surface of the sealing rings, but also the axial sealing of the rotating shaft 30 is realized. The sealing ring is extruded and deformed transversely through the pressing plate 40, so that the sealing ring is tightly held by the rotating shaft 30, and the radial sealing effect is further improved. When air pressure exists in the sealing cavity, the air pressure can be released unidirectionally through the annular sealing lip 13, and the air pressure at two sides of the sealing ring is ensured to be close.

In the embodiment of the present utility model, referring to fig. 2 and 3, a limiting protrusion 42 is disposed on a surface of the pressing plate 40 facing the sealing ring, and the limiting protrusion 42 is disposed around the periphery of the first via hole and is used for abutting against the periphery of the sealing ring. The limiting protrusion 42 may be an annular sealing lip 13 or a bar-shaped protrusion which is arranged in a central symmetry manner and is in an arc shape. The butt joint surface of the limiting bulge 42 and the sealing ring is set to be an inclined plane, so that the sealing ring is extruded towards the center, the hoop force of the annular sealing lip 13 on the rotating shaft 30 is increased, and the sealing stability of the sealing ring is facilitated. Furthermore, the first through hole is flared towards one side of the sealing ring to accommodate the annular sealing lip 13, avoiding the pressing plate 40 directly overlying the annular sealing lip 13.

In the embodiment of the present utility model, referring to fig. 2, the width of the seal ring is W1, the distance between the inner wall of the first via hole and the outer periphery of the rotating shaft 30 is W2, and W1 is 4 to 6 times of W2. In this embodiment, the pressing plate 40 covers most of the area of the ring body 10 from outside to inside to limit the bad deformation of the sealing ring, and meanwhile, a certain interval between the pressing plate 40 and the annular sealing lip 13 can be ensured to avoid interference.

In the embodiment of the present utility model, referring to fig. 1, the rotary sealing structure further includes a box 21 disposed at one side of the mounting member 20, the box 21 and the mounting member 20 are configured with a sealing cavity, and one end of the rotating shaft 30 is located in the sealing cavity. In this embodiment, an opening is formed on one side of the case 21, and the mounting member 20 is disposed at the opening of the case 21 to seal the case 21. At this time, a sealed cavity is formed inside the case 21. The interior of the seal chamber may be fitted with components that are highly environmentally clean, and an external drive member transmits torque to the components within the seal chamber via the shaft 30 to drive the operation or movement thereof.

In an embodiment of the present utility model, referring to fig. 6, the rotary seal structure further includes a cooling assembly in communication with the heat dissipation channel 12, the cooling assembly being configured to supply a cooling medium to the heat dissipation channel 12. In the present embodiment, the cooling assembly includes a first delivery pipe 11a provided at one of the heat dissipation holes 11, the first delivery pipe 11a for delivering cooling gas into the heat dissipation passage, wherein the cooling gas includes air, and the rotary seal structure further includes an air pump in communication with the first delivery pipe 11a for delivering air into the heat dissipation passage 12. Of course, the cooling gas may be carbon dioxide, nitrogen, compressed air, etc., and the cooling gas is stored in a gas cylinder, and the rotary sealing structure further includes a gas valve communicated with the first conveying pipe 11a, and the gas valve may be an electromagnetic valve for controlling the on-off of the first conveying pipe 11 a. By arranging the cooling component, the sealing ring can be cooled, and the friction overheating of the sealing ring and the rotating shaft 30 is avoided. The cooling gas in the heat dissipation path 12 may be directly discharged through other heat dissipation holes or discharged through the second delivery pipe 11 b. In order to reduce noise generated during the exhaust process, a muffler may be further provided on the first transfer pipe 11 b.

In the embodiment of the present utility model, referring to fig. 6, instead of using the above-mentioned gaseous cooling medium, a liquid cooling medium such as water, alcohol, propanol, etc. may be used. The cooling assembly further comprises a second delivery pipe 11b arranged at the other heat dissipation hole 11, and in addition, the rotary sealing structure further comprises a circulating pump communicated with the first delivery pipe 11a and the second delivery pipe 11b, wherein the circulating pump is used for delivering the liquid cooling medium to the heat dissipation channel 12 through the first delivery pipe 11a and then back to the circulating pump through the second delivery pipe 11 b. It is noted that, in order to prevent leakage of the liquid cooling medium, the heat radiation holes 11 on the seal ring can be connected and communicate only with the above-described first delivery pipe 11a and second delivery pipe 11 b. The above-described cooling gas is also applicable to the circulating cooling method in the present embodiment. In addition, a second through hole 41 corresponding to the heat dissipation hole 11 is further provided on the pressing plate 40, and the second through hole 41 may be an arc-shaped long hole, so that the first conveying pipe 11a and the second conveying pipe 11b pass through and are in butt joint with the heat dissipation hole 11. The heat dissipation hole 11 may be provided with an outwardly extending counter-plug or an extending pipe, so that the first and second pipes 11a and 11b may be connected. The above-mentioned butt joint or extension pipe may be regarded as a part of the first and second delivery pipes 11a and 11b, or as a part of the seal ring.

The embodiment of the utility model also provides laser equipment which comprises the rotary sealing structure. Referring to fig. 1, the rotation shaft 30 is connected to a shutter or an energy controller of the laser apparatus at one end and to a driving member at the other end, thereby driving the movement of the shutter or the energy controller to accomplish the control of the optical path. Specifically, a sealing cavity may be configured on a side of the mounting member 20 facing away from the pressing plate 40, and the laser component is disposed in the sealing cavity, so as to meet the requirement of the laser component on environmental cleanliness.

The above description and drawings should not be taken as limiting the scope of the utility model in any way, but rather should be understood to cover all modifications, structural equivalents, or direct/indirect applications of the utility model in the light of the general principles of the present utility model which may be employed in the present utility model and illustrated by the accompanying drawings.

Claims (12)

1. A seal ring, comprising:

the ring body is internally provided with a heat dissipation channel in a hollow way, and the ring body is provided with a heat dissipation hole communicated with the heat dissipation channel;

the annular sealing lip is arranged on one side of the ring body and comprises a connecting part connected with the ring body and a sealing part far away from the ring body, and the inner diameter of the sealing part is smaller than that of the ring body.

2. The seal ring of claim 1, wherein an inner wall of the annular sealing lip has a taper, and the thickness of the connecting portion is greater than the thickness of the sealing portion.

3. The seal ring of claim 1, wherein the seal ring has a shore hardness in the range of 98-102.

4. The seal ring of claim 1, wherein the seal ring comprises POM, nylon or teflon.

5. A rotary seal structure comprising a seal ring according to any one of claims 1 to 4.

6. The rotary seal structure of claim 5, further comprising a platen, a rotatably coupled mounting member and a shaft, the platen having a first via through which the shaft passes; the sealing ring is clamped by the pressing plate and the mounting piece and sleeved on the periphery of the rotating shaft.

7. The rotary seal structure according to claim 6, wherein a side of the pressing plate facing the seal ring is provided with a limit protrusion, and the limit protrusion is arranged around the periphery of the first via hole and is used for abutting against the periphery of the seal ring; the first via is flared toward one side of the seal ring to accommodate the annular sealing lip.

8. The rotary seal structure of claim 6, further comprising a cooling assembly in communication with the heat dissipation channel for a cooling medium to be input to the heat dissipation channel.

9. The rotary seal structure according to claim 6, wherein the sealing ring has a width W1, and the first via hole has a distance W2 from the outer periphery of the rotating shaft, wherein W1 is 4 to 6 times W2.

10. The rotary seal structure according to claim 6, further comprising a case provided on one side of the mount, the case and the mount being configured with a seal chamber in which one end of the rotating shaft is located.

11. The rotary seal structure of claim 6 wherein a coefficient of friction between the annular seal lip and the shaft is less than 0.5.

12. A laser device comprising the rotary seal structure according to any one of claims 5 to 10.