CN213017709U

CN213017709U - Mechanical seal capable of adjusting tightness of shaft clamp

Info

Publication number: CN213017709U
Application number: CN202021496409.4U
Authority: CN
Inventors: 邬晨晖; 仇栋; 俞旭腾
Original assignee: Ningbo Anmu Sealing Technology Co ltd
Current assignee: Ningbo Anmu Sealing Technology Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2021-04-20
Anticipated expiration: 2030-07-24

Abstract

The utility model provides a mechanical seal of adjustable axle card elasticity belongs to mechanical seal technical field. It has solved the current poor problem of mechanical seal stability. The utility model relates to a mechanical seal of adjustable axle card elasticity includes axis body, connecting seat, jump ring, adjusting screw, moves seat and spring. When the installation, install the connecting seat on the axis body, install the jump ring in the connecting seat to with jump ring and axis body contact, afterwards, with adjusting screw and connecting seat threaded connection, through twisting the adjusting screw, alright adjust the elasticity of jump ring card on the axis body, so that the card that the jump ring can be stable on the axis body.

Description

Mechanical seal capable of adjusting tightness of shaft clamp

Technical Field

The utility model belongs to the technical field of mechanical seal spare, a mechanical seal of adjustable axle card elasticity is related to.

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 is typically comprised of a moving component fixed to the shaft and a stationary component fixed to the housing.

The static mechanical seal is a common mechanical seal element and comprises a rubber bellows seal ring, a pressure element, a pair of metal seats capable of transmitting torque, a spring seat and a seal ring; the movable assembly is relatively simple and consists of a movable ring and a rubber sealing element. The dynamic ring and the static ring are a pair of friction pairs with high flatness, and form a sealing surface under the action of a pressure element. The clearance between the two parts in relative rotation is in the micron order, so that the leakage of the internal fluid from the sealing surface can be effectively prevented. The springs of the static assembly are compressed during installation to provide a positive pressure on the sealing surfaces. The positive pressure can keep the sealing surface closed only by offsetting the thrust caused by the fluid pressure inside the seal, so people need to pay attention to the stability of the machine when assembling the mechanical seal, especially the installation of a mechanical seal transmission part and the stability on the shaft, most mechanical seal transmission parts are fixed on the shaft by bolts at present, but the surface of the shaft is damaged and twisted by the bolts due to long-term replacement and installation, the surface of the shaft is uneven or has bulges, the problem that the mechanical seal transmission part is difficult to disassemble and assemble is caused, and the embarrassing situation that the shaft is not tight to loosen or the screws cannot be corroded to disassemble is easy to occur after long-term use.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a mechanical seal of adjustable axle card elasticity that stability is good.

The purpose of the utility model can be realized by the following technical proposal: a mechanical seal with adjustable shaft tightness, comprising:

a shaft body;

the connecting seat is sleeved on the shaft body, a clamp spring is installed in the connecting seat and surrounds the shaft body, and an adjusting screw for adjusting the clamp spring is detachably connected to the connecting seat;

the movable seat is sleeved on the shaft body and connected with the connecting seat, the movable seat moves relative to the connecting seat, and a spring is arranged between the connecting seat and the movable seat.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, the movable seat and the clamp spring are respectively positioned at two ends of the connecting seat.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, the clamping plates are arranged at two ends of the clamping spring, the adjusting screw is provided with the adjusting head, the side surface of the adjusting head is provided with the inclined surface, and the clamping spring and the clamping plates are in contact with the inclined surface.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, the movable seat is provided with a plurality of clamping hooks, the clamping hooks are inserted into the connecting seat and move relative to the connecting seat, and the connecting seat is internally provided with a stop block for preventing the corresponding clamping hooks from being separated from the connecting seat.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, the movable seat is internally provided with the dustproof cushion which is sleeved on the shaft body, and the movable seat is internally provided with the movable ring in a clamping manner.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, a gasket is arranged between the dustproof pad and the movable ring.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, the seal ring is arranged between the movable ring and the shaft body.

In the mechanical seal capable of adjusting the tightness of the shaft clamp, the shaft body is sleeved with the static seat, the static seat is clamped with the static ring in contact with the movable ring, and the static seat rotates relative to the shaft body.

In foretell mechanical seal of adjustable axle card elasticity, the cover is equipped with the assembler on the axis body, the relative axis body of assembler removes, set up the pilot hole that corresponds adjusting screw in the assembler, be equipped with the bulge loop that corresponds the jump ring on the terminal surface of assembler.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. when the installation, install the connecting seat on the axis body, install the jump ring in the connecting seat to with jump ring and axis body contact, afterwards, with adjusting screw and connecting seat threaded connection, through twisting the adjusting screw, alright adjust the elasticity of jump ring card on the axis body, so that the card that the jump ring can be stable on the axis body.

2. The area of contact of jump ring and axis body is bigger than the area of contact of bolt and axis body for frictional force between jump ring and the axis body is big, and the difficult emergence of jump ring is not hard up, simultaneously, also reduces the surperficial possibility of jump ring wearing and tearing axis body.

3. The mechanical seal is assembled by adopting the assembler, the assembling efficiency of the mechanical seal is improved, and meanwhile, the mechanical seal is convenient for people to operate.

Drawings

FIG. 1 is a schematic structural diagram of a mechanical seal according to one embodiment.

Fig. 2 is a schematic structural view of the mechanical seal in the second embodiment.

Fig. 3 is an assembly view of the clip spring and the connector holder.

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.

Example one

As shown in fig. 1 and fig. 3, the mechanical seal of the present invention includes a shaft body 100, a connecting seat 200, a clamp spring 210, an adjusting screw 300, a movable seat 400 and a spring 230.

The connecting base 200 is sleeved on the shaft body 100, the clamp spring 210 is installed in the connecting base 200, the clamp spring 210 is surrounded and sleeved on the shaft body 100, the adjusting screw 300 for adjusting the clamp spring 210 is detachably connected on the connecting base 200, the movable base 400 is sleeved on the shaft body 100, the movable base 400 is connected with the connecting base 200, the movable base 400 moves relative to the connecting base 200, the spring 230 is arranged between the connecting base 200 and the movable base 400, the movable base 400 is provided with a plurality of hooks 410, the hooks 410 are inserted into the connecting base 200, the hooks 410 move relative to the connecting base 200, the connecting base 200 is internally provided with a stopper 220 for preventing the corresponding hooks 410 from being separated from the connecting base 200, when in installation, people need to install the movable base 400 on the shaft body 100, install the connecting base 200 on the shaft body 100, and insert the hooks 410 on the movable base 400 into the connecting base 200 until the hooks 410 pass through the corresponding stopper 220, then, the snap spring 210 is installed in the connecting seat 200, the snap spring 210 is in contact with the shaft body 100, then the adjusting screw 300 is in threaded connection with the connecting seat 200, the tightness of the snap spring 210 clamped on the shaft body 100 can be adjusted by screwing the adjusting screw 300, so that the snap spring 210 can be stably clamped on the shaft body 100, and the connecting seat 200 is stably installed on the shaft body 100 because the snap spring 210 is clamped in the connecting seat 200; furthermore, because the contact area between the snap spring 210 and the shaft body 100 is larger than that between the bolt and the shaft body 100, the friction force between the snap spring 210 and the shaft body 100 is large, the snap spring 210 is not easy to loosen, and meanwhile, the possibility that the snap spring 210 abrades the surface of the shaft body 100 is also reduced; in addition, during the installation process, one end of the spring 230 needs to be abutted against the connecting seat 200, and the other end of the spring 230 is abutted against the movable seat 400, so that when the mechanical seal works, the spring 230 always has a certain elastic force to the movable seat 400.

The movable seat 400 is internally provided with a movable ring 420 in a clamping manner, the shaft body 100 is sleeved with a fixed seat 140, the fixed seat 140 is provided with a fixed ring 141 in a clamping manner, the fixed seat 140 rotates relative to the shaft body 100, when the movable seat is installed, a user needs to connect the fixed seat 140 with a pump body (not marked in the figure) suitable for the mechanical seal in a threaded manner, and then the fixed seat 140 is sleeved on the shaft body 100, when the movable seat 400 is installed on the shaft body 100 and the movable ring 420 is contacted with the fixed ring 141, the movable seat 400 has a certain acting force on the movable ring 420 due to the fact that the spring 230 always has a certain elastic force on the movable seat 400, so that a positive pressure is formed between the fixed ring 141 and the movable ring 420, and the positive pressure just offsets the thrust force caused by the fluid pressure in the mechanical seal, so that the seal surface can be kept closed; secondly, because the movable seat 400 and the clamp spring 210 are respectively located at two ends of the connecting seat 200, when the connecting seat 200 is used, the connecting seat 200 does not move in a direction away from the movable seat 400, that is, the situation that the connecting seat 200 moves on the shaft body 100 in a dislocation manner is avoided, that is, a stable positive pressure is always kept between the movable ring 420 and the stationary ring 141.

Clamping plates 211 are arranged at two ends of the clamp spring 210, an adjusting head 310 is arranged on the adjusting screw 300, an inclined surface 320 is arranged on the side surface of the adjusting head 310, the clamp spring 210 and the clamping plates 211 are in contact with the inclined surface 320, after people install the clamp spring 210 into the connecting seat 200, people need to connect the adjusting screw 300 with the connecting seat 200 in a threaded manner, and both the clamp spring 210 and the clamping plates 211 are in contact with the inclined surface 320, then people only need to screw the adjusting head 310 to screw the adjusting screw 300 into the connecting seat 200, because the diameter of the inclined surface 320 is gradually increased from inside to outside, when the adjusting screw 300 is screwed into the connecting seat 200, the extrusion force of the inclined surface 320 of the adjusting head 310 on the clamping spring 210 is increased, so that the diameter of the clamp spring 210 is reduced, namely, the distance between the two clamping plates is reduced, namely, the clamping force of the clamp spring 210 on the shaft body 100 is, therefore, the clamping force of the clamp spring 210 clamped on the shaft body 100 can be adjusted, so that the clamp spring 210 can be stably clamped on the shaft body 100.

Be equipped with dustproof pad 110 in the movable seat 400, dustproof pad 110 cover is established on axis body 100, through the setting of this dustproof pad 110, effectively blocks external debris and enters into this mechanical seal to guarantee this movable ring 420 and movable seat 400 relative axis body 100 steady movement.

The gasket 120 is disposed between the dust-proof pad 110 and the movable ring 420, and the gasket 120 is disposed to prevent the movable ring 420 from directly contacting the dust-proof pad 110.

A seal ring 130 is provided between the rotating ring 420 and the shaft body 100.

Example two

As shown in fig. 2, the present embodiment is different from the first embodiment in that an assembler 500 is added to the first embodiment.

Specifically, the shaft body 100 is sleeved with the assembler 500, the assembler 500 moves relative to the shaft body 100, the assembler 500 is provided with an assembling hole 510 corresponding to the adjusting screw 300, one end surface of the assembler 500 is provided with a convex ring 520 corresponding to the snap spring 210, when a person sleeves the connecting seat 200 on the shaft body 100, the assembler 500 can also sleeve the shaft body 100 and enable the convex ring 520 to abut against the snap spring 210, and the central axis of the assembling hole 510 coincides with the central axis of the adjusting screw 300, therefore, when the person pushes the assembler 500, the assembler 500 can push the connecting seat 200 to move away from the assembler 500, and when the connecting seat 200 moves to a designated position, the pushing of the assembler 500 is stopped, a screwdriver suitable for the adjusting screw 300 passes through the assembling hole 510, so that the screwdriver can contact the adjusting screw 300, and further enable the screwdriver to rotate the adjusting screw 300, after the clamp spring 210 holds the shaft body 100 tightly, people only need to move the assembler 500 out of the shaft body 100, and then the mechanical seal can be assembled, so that the operation of people is facilitated.

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 mechanical seal with adjustable shaft clamping tightness, comprising:

a shaft body;

2. The mechanical seal capable of adjusting the tightness of the shaft clamp according to claim 1, wherein the movable seat and the clamp spring are respectively located at two ends of the connecting seat.

3. The mechanical seal capable of adjusting the tightness of the shaft clamp according to claim 1, wherein clamping plates are arranged at two ends of each clamping spring, an adjusting head is arranged on each adjusting screw, an inclined surface is arranged on the side surface of each adjusting head, and the clamping springs and the clamping plates are in contact with the inclined surfaces.

4. The mechanical seal capable of adjusting the tightness of shaft clamping according to claim 1, wherein the movable seat is provided with a plurality of clamping hooks, the clamping hooks are inserted into the connecting seat, the clamping hooks move relative to the connecting seat, and the connecting seat is provided with a stop block for preventing the corresponding clamping hooks from being separated from the connecting seat.

5. The mechanical seal capable of adjusting the tightness of the shaft clamp according to claim 1, wherein a dust-proof cushion is arranged in the movable seat, the dust-proof cushion is arranged on the shaft body, and a movable ring is clamped in the movable seat.

6. The mechanical seal of claim 5, wherein a gasket is disposed between said dust seal and said rotating ring.

7. The mechanical seal with adjustable tightness of shaft clamp according to claim 5, wherein a seal ring is disposed between said rotating ring and the shaft body.

8. The mechanical seal capable of adjusting the tightness of the shaft clamp according to claim 1, wherein a stationary seat is sleeved on the shaft body, a stationary ring in contact with the movable ring is clamped on the stationary seat, and the stationary seat rotates relative to the shaft body.

9. The mechanical seal capable of adjusting the tightness of the shaft clamp according to claim 1, wherein an assembler is sleeved on the shaft body and moves relative to the shaft body, an assembly hole corresponding to an adjusting screw is formed in the assembler, and a convex ring corresponding to a clamp spring is arranged on one end surface of the assembler.