CN218031412U

CN218031412U - High-torque mechanical sealing element

Info

Publication number: CN218031412U
Application number: CN202221576773.0U
Authority: CN
Inventors: 张竺翔; 王斌; 俞旭腾
Original assignee: Ningbo Anmu Sealing Technology Co ltd
Current assignee: Ningbo Anmu Sealing Technology Co ltd
Priority date: 2022-06-22
Filing date: 2022-06-22
Publication date: 2022-12-13
Anticipated expiration: 2032-06-22

Abstract

The utility model relates to a mechanical seal technical field discloses a high moment of torsion mechanical seal spare, include: a rotating shaft; the fixing component comprises a mounting seat and a fixing piece; the mounting seat is sleeved on the rotating shaft and is provided with a concave part; the fixing piece penetrates through the mounting seat and is connected with the rotating shaft; the movable ring assembly comprises a rubber corrugated pipe, a movable ring seat and a movable ring body; one end of the rubber corrugated pipe is arranged between the rotating shaft and the concave part, and the other end of the rubber corrugated pipe is arranged between the movable ring seat and the movable ring body. The utility model has the advantages that the fixing piece passes through the mounting seat and is connected with the rotating shaft, and the fixing piece can lock the position of the mounting seat and prevent the relative sliding between the mounting seat and the rotating shaft; the concave part through the mounting seat presses the rubber corrugated pipe on the rotating shaft, so that the rubber corrugated pipe and the rotating shaft can be prevented from slipping, and sealing failure is avoided.

Description

High-torque mechanical sealing element

Technical Field

The utility model relates to a mechanical seal technical field refers in particular to a high moment of torsion mechanical seal spare.

Background

Mechanical seals are widely used in pumps, compressors, and mixing machines. The leakage path between a rotating part (such as a shaft) and a static structure cavity is cut off, and harmful media in the cavity are prevented from leaking to the outside. The mechanical seal typically consists of a moving ring assembly fixed to the shaft and a stationary ring assembly fixed to the chamber.

The rotating ring assembly comprises a rotating ring body and a rubber corrugated pipe, the static ring assembly comprises a static ring body, the rotating ring body and the static ring body are a pair of high-flatness friction pairs, and a sealing surface is formed under the action of the pressure element. At present, a movable ring body and a rubber corrugated pipe are connected in an interference fit manner, and the rubber corrugated pipe is sleeved on a rotating shaft, so that the movable ring body can be driven to rotate; however, when the sealing device works, the rubber corrugated pipe slips with the rotating shaft under the action of friction force generated by the friction pair, and the rubber corrugated pipe is easy to twist, so that sealing failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses having considered aforementioned problem and having made, utility model's purpose provides a high moment of torsion mechanical seal spare, it can prevent that rubber bellows and pivot from taking place to skid, avoids sealed inefficacy.

To achieve the above object, the present invention provides a high torque mechanical seal, including:

a rotating shaft;

the fixing component comprises a mounting seat and a fixing piece; the mounting seat is sleeved on the rotating shaft and is provided with a concave part; the fixing piece penetrates through the mounting seat and is connected with the rotating shaft;

the movable ring assembly comprises a rubber corrugated pipe, a movable ring seat and a movable ring body; one end of the rubber corrugated pipe is arranged between the rotating shaft and the concave part, and the other end of the rubber corrugated pipe is arranged between the movable ring seat and the movable ring body.

According to the high-torque mechanical sealing element, the fixing piece is set as a set screw; the set screw passes through the mounting seat and is abutted to the rotating shaft.

According to the high-torque mechanical seal, the set screw is provided in plurality; and the set screws penetrate through the mounting seat and are abutted against the rotating shaft.

According to the high-torque mechanical sealing element, the inner side of the rubber corrugated pipe is provided with the first protrusion, the movable ring body is provided with the first groove, and the first protrusion is arranged in the first groove;

the outer side of the rubber corrugated pipe is provided with a second protrusion, the movable ring seat is provided with a second groove, and the second protrusion is arranged in the second groove.

According to the above high-torque mechanical seal, the first protrusion, the second protrusion, the first groove and the second groove are all provided in plurality, the first protrusions are respectively arranged in the first grooves, and the second protrusions are respectively arranged in the second grooves.

According to the high-torque mechanical sealing element, the rotating ring seat is provided with the anti-rotation pin, the mounting seat is provided with the pin hole, and the anti-rotation pin is inserted into the pin hole.

According to the high-torque mechanical sealing element, the fixing assembly further comprises a spiral spring, and a mounting hole is formed in the mounting seat; one end of the spiral spring is arranged in the mounting hole, and the other end of the spiral spring is fixedly connected with the movable ring seat.

According to the high-torque mechanical sealing element, the movable ring seat is provided with the fixing pin, and the fixing pin penetrates through the spiral spring.

According to the high-torque mechanical sealing element, the fixed assembly and the sealing assembly surround to form an accommodating cavity, a sealing groove is formed in the mounting seat, a sealing ring is arranged in the sealing groove, and the sealing ring is abutted to the movable ring seat.

According to above a high moment of torsion mechanical seal, still including setting up the quiet ring subassembly of one side of rotating ring subassembly, quiet ring subassembly is including quiet ring body, quiet ring body with the rotating ring body laminating.

The utility model discloses following beneficial effect has:

1. the fixing piece penetrates through the mounting seat and is connected with the rotating shaft, and the position of the mounting seat can be locked by the fixing piece, so that the mounting seat and the rotating shaft are prevented from sliding relatively; the rubber corrugated pipe is pressed on the rotating shaft through the concave part of the mounting seat, so that the rubber corrugated pipe and the rotating shaft can be prevented from slipping, and sealing failure is avoided;

2. the first bulge is arranged in the first groove, and the second bulge is arranged in the second groove, so that the torque transmission effect can be achieved, and the relative sliding between the movable ring seat and the movable ring body and the rubber corrugated pipe can be avoided;

3. the mounting seat can drive the movable ring seat to rotate through the anti-rotation pin, so that one end of the rubber corrugated pipe, which is far away from the mounting seat, can be prevented from being twisted, and the anti-torsion capacity of the mechanical sealing element is improved;

drawings

Fig. 1 is a cross-sectional view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the rubber bellows of the present invention.

In the figure: 100. a rotating shaft; 200. a fixing assembly; 210. a mounting seat; 211. a recessed portion; 212. a pin hole; 213. mounting holes; 214. an extension portion; 215. a sealing groove; 216. a seal ring; 217. a drain hole; 220. a fixing member; 221. tightening the screw; 230. a coil spring; 300. a rotating ring assembly; 310. a rubber bellows; 311. a first protrusion; 312. a second protrusion; 320. a movable ring seat; 321. an anti-rotation pin; 322. a fixing pin; 330. a rotating ring body; 400. a stationary ring assembly; 410. a stationary ring body.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

1-2, a high torque mechanical seal, primarily for use between a rotating component and a stationary structural cavity, includes a rotating shaft 100, a stationary assembly 200, a moving ring assembly 300, and a stationary ring assembly 400.

The fixing assembly 200 comprises a mounting seat 210 and a fixing piece 220; the mounting seat 210 is sleeved on the rotating shaft 100 and is provided with a concave part 211; the fixing member 220 penetrates through the mounting base 210 and is connected with the rotating shaft 100; the rotating ring assembly 300 comprises a rubber bellows 310, a rotating ring seat 320 and a rotating ring body 330; one end of the rubber bellows 310 is disposed between the rotation shaft 100 and the recess 211, and the other end is disposed between the moving ring seat 320 and the moving ring body 330. The fixing member 220 penetrates through the mounting seat 210 and is connected to the rotating shaft 100, and the fixing member can lock the position of the mounting seat 210 to prevent the mounting seat 210 and the rotating shaft 100 from sliding relatively; the rubber bellows 310 is pressed on the rotating shaft 100 through the concave part 211 of the mounting seat 210, so that the rubber bellows 310 and the rotating shaft 100 can be prevented from slipping, and sealing failure can be avoided. Compared with the prior art, the mechanical sealing element locks the position of the mounting seat 210 through the fixing element 220, and the rubber corrugated pipe 310 is pressed on the rotating shaft 100 by the mounting seat 210, so that the rubber corrugated pipe 310 and the rotating shaft 100 can be prevented from slipping, and sealing failure is avoided.

The stationary ring assembly 400 comprises a stationary ring body 410, and the stationary ring body 410 is attached to the moving ring body 330; which can form a sealing surface between the rotating ring body 330 and the stationary ring body 410 to provide a seal. Preferably, the stationary ring body 410 is provided with an O-ring that abuts the stationary structural cavity to provide a seal.

The fixing member 220 is provided as a set screw 221; the set screw 221 passes through the mounting base 210 and abuts against the rotating shaft 100; the position of the mounting seat 210 is locked by the set screw 221, and the structure is simple and the installation is convenient.

A plurality of set screws 221; the set screws 221 each pass through the mount 210 and are abutted against the rotary shaft 100. Preferably, the number of the set screws 221 is four, and the position of the mount 210 is locked by the four set screws 221, so that the locking effect is further improved.

A first protrusion 311 is arranged on the inner side of the rubber bellows 310, a first groove (not shown) is arranged on the movable ring body 330, and the first protrusion 311 is arranged in the first groove; the outer side of the rubber bellows 310 is provided with a second protrusion 312, the movable ring seat 320 is provided with a second groove (not shown), and the second protrusion 312 is disposed in the second groove. By arranging the first protrusion 311 in the first groove and the second protrusion 312 in the second groove, the torque transmission function can be achieved, and the relative sliding between the moving ring seat 320 and the moving ring body 330 and the rubber bellows 310 can be avoided. Preferably, the movable ring seat 320 and the movable ring body 330 are connected to the rubber bellows 310 by interference fit, which can also transmit torque and also perform sealing function.

Preferably, the first protrusion 311, the second protrusion 312, the first groove and the second groove are provided in plural, the plural first protrusions 311 are respectively disposed in the plural first grooves, and the plural second protrusions 312 are respectively disposed in the plural second grooves, which can improve the capability of the mechanical seal to transmit torque.

The rotating ring seat 320 is provided with an anti-rotation pin 321, the mounting seat 210 is provided with a pin hole 212, and the anti-rotation pin 321 is inserted into the pin hole 212. The anti-rotation pin 321 plays a role in transmitting torque, and the mounting seat 210 can drive the rotating ring seat 320 to rotate through the anti-rotation pin 321, so that one end of the rubber corrugated pipe 310, which is far away from the mounting seat 210, can be prevented from being twisted, and the anti-torque capacity of the mechanical sealing element is improved.

Preferably, a plurality of rotation preventing pins 321 and a plurality of pin holes 212 are provided, and the plurality of rotation preventing pins 321 are inserted into the plurality of pin holes 212, respectively. The anti-rotation pins 321 and the pin holes 212 are provided in two numbers, so that the anti-rotation capacity of the mechanical sealing element is further improved.

The fixing assembly 200 further comprises a coil spring 230, and the mounting seat 210 is provided with a mounting hole 213; one end of the coil spring 230 is disposed in the mounting hole 213, and the other end is fixedly connected to the movable ring holder 320. The coil spring 230 can provide a pushing force to make the moving ring body 330 and the stationary ring body 410 always fit, so as to form a sealing surface between the moving ring body 330 and the stationary ring body 410.

The movable ring seat 320 is provided with a fixing pin 322, and the fixing pin 322 is inserted into the coil spring 230. The fixing pin 322 can provide guidance for the expansion and contraction of the coil spring 230, prevent the coil spring 230 from deflecting, and assist the rotation prevention pin 321 to transmit torque. Preferably, six fixing pins 322 and six coil springs 230 are provided, and the six fixing pins 322 are respectively inserted into the six coil springs 230, so that a greater thrust can be provided to ensure that the stationary ring body 410 and the moving ring body 330 are attached to each other to form a sealing surface.

The fixed component 200 and the sealing component surround to form an accommodating cavity, a sealing groove 215 is arranged on the mounting seat 210, a sealing ring 216 is arranged in the sealing groove 215, and the sealing ring 216 abuts against the movable ring seat 320. Wherein, sealing washer 216 is O type circle, holds the chamber and is equipped with the medium, and sealing washer 216 plays sealed effect, can completely cut off external, avoids during matters such as external dust get into and hold the chamber, pollutes the medium that holds the intracavity. Preferably, the mounting seat 210 is provided with an extension 214, the sealing groove 215 is provided on the extension 214, and the rotating ring seat 320 is mounted inside the extension 214.

In this embodiment, a drain hole 217 is formed in the mounting base 210, the drain hole 217 is communicated with the accommodating cavity, and the medium in the accommodating cavity can be rapidly discharged through the drain hole 217. The position where the rubber corrugated pipe 310 is connected with the movable ring seat 320 is provided with 7 ribs with semicircular sections, which can reduce the assembly difficulty of the mechanical sealing element.

The scheme provides a high-torque mechanical sealing element which is mainly used between a rotating component and a static structural cavity and comprises a rotating shaft 100, a fixed component 200, a movable ring component 300 and a static ring component 400. The position of the mounting seat 210 is locked by the fixing member 220, and the rubber bellows 310 is pressed on the rotating shaft 100 by the mounting seat 210, so that the rubber bellows 310 and the rotating shaft 100 can be prevented from slipping, and sealing failure is avoided.

The technical solutions of the present invention have been described in detail with reference to the accompanying drawings, and the described embodiments are used to help understand the ideas of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the claims.

It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

Furthermore, the descriptions of the embodiments as "first," "second," "a," etc. in this disclosure are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of the indicated features is indicative. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In addition, the technical solutions between the embodiments of the present invention can be combined with each other, but it is necessary to be able to be realized by a person having ordinary skill in the art as a basis, and when the technical solutions are contradictory or cannot be realized, the combination of such technical solutions should be considered to be absent, and is not within the protection scope of the present invention.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A high torque mechanical seal, comprising:

a rotating shaft;

the fixing assembly comprises a mounting seat and a fixing piece; the mounting seat is sleeved on the rotating shaft and is provided with a concave part; the fixing piece penetrates through the mounting seat and is connected with the rotating shaft;

2. A high torque mechanical seal according to claim 1, wherein said fixing member is provided as a set screw; the set screw passes through the mounting seat and is abutted to the rotating shaft.

3. A high torque mechanical seal according to claim 2, wherein said set screw is provided in plurality; and the set screws penetrate through the mounting seat and are abutted against the rotating shaft.

4. The high-torque mechanical seal according to claim 1, wherein a first protrusion is disposed on an inner side of the rubber bellows, a first groove is disposed on the movable ring body, and the first protrusion is disposed in the first groove;

5. The high torque mechanical seal according to claim 4, wherein the first projection, the second projection, the first groove, and the second groove are provided in plurality, the first projections are provided in the first grooves, respectively, and the second projections are provided in the second grooves, respectively.

6. The high torque mechanical seal of claim 1, wherein the rotating ring seat is provided with an anti-rotation pin, and the mounting seat is provided with a pin hole, and the anti-rotation pin is inserted into the pin hole.

7. The high torque mechanical seal of claim 1, wherein said stationary assembly further comprises a coil spring, said mounting seat having a mounting hole; one end of the spiral spring is arranged in the mounting hole, and the other end of the spiral spring is fixedly connected with the movable ring seat.

8. The high-torque mechanical seal according to claim 7, wherein a fixing pin is disposed on the movable ring seat, and the fixing pin is inserted into the coil spring.

9. The high-torque mechanical seal according to claim 1, wherein the fixed component and the moving ring component surround to form a receiving cavity, a seal groove is formed in the mounting seat, a seal ring is arranged in the seal groove, and the seal ring abuts against the moving ring seat.

10. The high-torque mechanical seal according to claim 1, further comprising a stationary ring assembly disposed on one side of the rotating ring assembly, the stationary ring assembly including a stationary ring body, the stationary ring body being attached to the rotating ring body.