CN220850748U

CN220850748U - Packaging type mechanical seal with rubber corrugated pipe

Info

Publication number: CN220850748U
Application number: CN202322773087.3U
Authority: CN
Inventors: 李平; 董军锋; 李少峰; 叶传剑; 励佳栋
Original assignee: Ningbo Donglian Mechanical Seal Co ltd
Current assignee: Ningbo Donglian Mechanical Seal Co ltd
Priority date: 2023-10-12
Filing date: 2023-10-12
Publication date: 2024-04-26
Anticipated expiration: 2033-10-12

Abstract

The utility model provides a container type mechanical seal with a rubber corrugated pipe, which belongs to the technical field of mechanical seals and comprises the following components: the rubber corrugated pipe is sleeved on the transmission sleeve, the rubber corrugated pipe comprises a fixed section and a free section, the fixed section is clamped with the transmission sleeve, the rubber corrugated pipe can rotate together with the transmission sleeve, the end face of the free section is provided with a movable ring, and gaps are reserved between the free section and the transmission sleeve and between the movable ring and the transmission sleeve; the beneficial effects of the utility model are as follows: the movable ring is arranged at the end part of the rubber corrugated pipe sleeve, the whole structure is simple and compact, and the radial runout and the axial float of the rotating shaft are compensated through the rubber corrugated pipe, so that the stability of the sealing surface is ensured.

Description

Packaging type mechanical seal with rubber corrugated pipe

Technical Field

The utility model belongs to the technical field of mechanical seals, and relates to a container type mechanical seal with a rubber corrugated pipe.

Background

The mechanical seal is a device for preventing fluid leakage, which is formed by at least one pair of end faces perpendicular to the rotation axis and keeps fit and relatively slide under the action of fluid pressure and the elasticity (or magnetic force) of the compensation mechanism and the cooperation of the auxiliary seal.

The motor at atmosphere side one end is connected with the pivot, because the reason such as bearing ageing leads to the pivot probably to produce axial and radial run-out, because the rotating ring is along with the pivot motion together, constitutes sealed face between rotating ring and the quiet ring, sealed face can lead to instability because of the run-out of pivot, and then makes mechanical seal have the risk of inefficacy.

Disclosure of utility model

The utility model aims to solve the problems in the prior art and provides a container type mechanical seal with a rubber corrugated pipe.

The aim of the utility model can be achieved by the following technical scheme: a cartridge mechanical seal with a rubber bellows, comprising: the transmission sleeve and the rubber bellows are sleeved with the transmission sleeve, the rubber bellows comprises a fixed section and a free section, the fixed section is clamped with the transmission sleeve, the rubber bellows can rotate along with the transmission sleeve, the end face of the free section is provided with a movable ring, and gaps are reserved between the free section and the transmission sleeve and between the movable ring and the transmission sleeve.

Preferably, the sealing device further comprises a sealing disc, wherein the sealing disc is provided with a disc hole, the transmission sleeve penetrates through the disc hole, a static ring is arranged in the disc hole, and the static ring is connected with the sealing disc through a stop pin.

Preferably, the fixed section is sleeved with a spring seat, the spring seat is provided with a spring, the spring is in abutting connection with the free section and applies positive pressure to the movable ring through the free section, and the movable ring is attached to the static ring surface under the action of positive pressure to form a sealing surface.

Preferably, the free section comprises a telescopic part and a support part, the telescopic part is of a telescopic folding structure, one end of the telescopic part is integrally connected with the fixed section, the other end of the telescopic part is integrally connected with the support part, the support part is sleeved with a movable ring seat, and the movable ring is embedded in the movable ring seat.

Preferably, a first check ring is sleeved at one end of the telescopic part, which is close to the fixed section, a second check ring is sleeved between the telescopic part and the bracket part, and the spring is in abutting connection with the first check ring.

Preferably, the sealing device further comprises a positioning block and a screw, wherein the transmission sleeve is sleeved with a fastening ring, the positioning block is connected with the fastening ring through the screw, and one end face of the positioning block is in abutting connection with the sealing disc.

Preferably, the sealing disc is provided with a flushing hole, one end of the flushing hole is positioned on the outer circumferential surface of the sealing disc, and the other end of the flushing hole faces the disc hole.

Preferably, the spring is sleeved on the rubber corrugated pipe.

Compared with the prior art, the utility model has the beneficial effects that:

1. The movable ring is arranged at the end part of the rubber corrugated pipe sleeve, the whole structure is simple and compact, and the radial runout and the axial float of the rotating shaft are compensated through the rubber corrugated pipe, so that the stability of the sealing surface is ensured.

2. The telescopic part has certain elasticity in the radial direction and the axial direction, and when the rotating shaft generates radial runout, the telescopic part compensates the runout in the radial direction through elastic deformation, so that the bracket part is kept motionless in the radial direction; when the rotating shaft generates axial movement, the telescopic part compensates the runout in the axial direction through elastic deformation, so that the support part is kept motionless in the axial direction.

3. The positioning block is used for guaranteeing the installation size, and the positioning block is connected with the fastening ring and is in abutting connection with the sealing disc, so that the relative position of the transmission sleeve and the sealing disc is guaranteed, and the transmission sleeve and the sealing disc are rapidly positioned and installed.

Drawings

Fig. 1 is a schematic structural view of the mechanical seal of the present utility model.

Fig. 2 is a schematic structural view of the rubber bellows of the present utility model.

100, A transmission sleeve; 110. a fastening ring; 200. a rubber bellows; 210. a fixed section; 220. a free section; 221. a telescopic part; 222. a bracket part; 230. a first retainer ring; 240. the second check ring; 300. a sealing plate; 310. flushing the hole; 400. a stationary ring; 500. a spring seat; 510. a spring; 600. a movable ring seat; 610. a moving ring; 700. a positioning block; 710. and (5) a screw.

Detailed Description

The following are specific embodiments of the present utility model and the technical solutions of the present utility model will be further described with reference to the accompanying drawings, but the present utility model is not limited to these embodiments.

As shown in fig. 1-2, a cartridge type mechanical seal with a rubber bellows, comprising: the transmission sleeve 100 and the rubber bellows 200, the rubber bellows 200 is sleeved on the transmission sleeve 100, the rubber bellows 200 comprises a fixed section 210 and a free section 220, the fixed section 210 is tightly clamped with the transmission sleeve 100, the rubber bellows 200 can rotate along with the transmission sleeve 100, the end face of the free section 220 is provided with a movable ring 610, and gaps are reserved between the free section 220 and the transmission sleeve 100 and between the movable ring 610 and the transmission sleeve 100.

The rotation shaft passes through the driving sleeve 100 and both can rotate together, one part of the rubber bellows 200 is a fixed section 210 and the other part is a free section 220, wherein the free section 220 is not in contact with the driving sleeve 100, and because the whole rubber bellows 200 is a whole, the fixed section 210 can transmit torque to the free section 220 so that the free section 220 rotates together with the driving sleeve 100, and the movable ring 610 rotates together with the driving sleeve 100.

In principle, the rubber bellows 200 can transmit the torque of the driving sleeve 100 to the moving ring 610, and does not transmit the axial or radial motion to the moving ring 610 during the rotation, and when the rotating shaft generates axial or radial runout, the rubber bellows 200 compensates by its own elasticity. Specifically, when radial runout occurs in the rotating shaft, the fixed segment 210 generates radial runout with respect to the free segment 220, and since the free segment 220 is not in contact with the driving sleeve 100 (there is a gap between the two), the moving ring 610 does not generate radial runout; similarly, when the shaft moves axially, the fixed section 210 moves axially relative to the free section 220, so the moving ring 610 does not move axially.

The movable ring 610 is arranged at the end part of the rubber bellows 200 sleeve, the whole structure is simple and compact, and the radial runout and the axial movement of the rotating shaft are compensated through the rubber bellows 200, so that the stability of the sealing surface is ensured.

As shown in fig. 1-2, on the basis of the above embodiment, the sealing disk 300 is further provided with a disk hole, the transmission sleeve 100 passes through the disk hole, a static ring 400 is arranged in the disk hole, and the static ring 400 is connected with the sealing disk 300 through a stop pin.

An annular space exists between the disk hole of the sealing disk 300 and the driving sleeve 100, and both the moving ring 610 and the stationary ring 400 are located in the annular space, and the rubber bellows 200 may also be located in the annular space. Wherein, a sealing ring is also arranged between the static ring 400 and the sealing disk 300.

On the basis of the above embodiment, the fixed section 210 is sleeved with the spring seat 500, the spring seat 500 is provided with the spring 510, the spring 510 is in abutting connection with the free section 220 and applies positive pressure to the moving ring 610 through the free section 220, and the moving ring 610 is in surface lamination with the static ring 400 under the action of positive pressure to form a sealing surface.

The spring 510 applies an elastic force to the free section 220 such that the free section 220 has a movement tendency to axially stretch; in a practical construction, the fixed section 210 is located at one end of the rubber bellows 200, and the movable ring 610 is located at the other end of the rubber bellows 200, and the free section 220 moves away from the fixed section 210 under the elastic force of the spring 510, so that a positive pressure can be applied to the movable ring 610.

In an example, the spring 510 is preferably a large spring 510, so that the spring 510 is sleeved on the rubber bellows 200.

In the above embodiment, the free section 220 includes a telescopic portion 221 and a support portion 222, the telescopic portion 221 is a telescopic folding structure, one end of the telescopic portion 221 is integrally connected with the fixed section 210, the other end of the telescopic portion is integrally connected with the support portion 222, the support portion 222 is sleeved with a movable ring seat 600, and the movable ring 610 is embedded in the movable ring seat 600.

The expansion part 221 is a section of the rubber bellows 200 with a corrugated portion, so that the expansion part 221 can expand and contract to a certain extent, when the ring surfaces of the movable ring 610 and the static ring 400 are worn, the expansion part 221 stretches under the action of the spring 510 so as to push the bracket part 222 to axially move towards the direction of the static ring 400, and the ring surface wear is compensated.

In addition, the telescopic part 221 has certain elasticity in the radial direction and the axial direction, when the radial runout of the rotating shaft occurs, the telescopic part 221 compensates the runout in the radial direction through elastic deformation, so that the bracket part 222 is kept motionless in the radial direction; when the axial play of the rotating shaft occurs, the expansion and contraction portion 221 compensates for the runout in the axial direction by elastic deformation, so that the holder portion 222 is kept stationary in the axial direction.

As shown in fig. 1-2, on the basis of the above embodiment, a first retainer ring 230 is sleeved at an end of the telescopic portion 221, which is close to the fixed section 210, a second retainer ring 240 is sleeved between the telescopic portion 221 and the bracket portion 222, and the spring 510 is in abutting connection with the first retainer ring 230. The spring 510 applies elastic force to the expansion part 221 through the first retainer ring 230 so that the expansion part 221 has a movement tendency to be stretched.

As shown in fig. 1, on the basis of the above embodiment, the present invention further includes a positioning block 700 and a screw 710, the driving sleeve 100 is sleeved with a fastening ring 110, the positioning block 700 is connected with the fastening ring 110 through the screw 710, and one end surface of the positioning block 700 is in abutting connection with the sealing disc 300.

The positioning block 700 is used for ensuring the installation size, and the positioning block 700 is connected with the fastening ring 110 and is in abutting connection with the sealing disc 300, so that the relative position of the transmission sleeve 100 and the sealing disc 300 is ensured, and the quick positioning installation of the transmission sleeve and the sealing disc 300 is realized. The fastening ring 110 is used to fix the driving sleeve 100 and the rotating shaft together.

As shown in fig. 1, in the above embodiment, the sealing disk 300 is provided with a flushing hole 310, one end of the flushing hole 310 is located on the outer circumferential surface of the sealing disk 300 and the other end is directed toward the disk hole. The cleaning fluid can rinse the moving ring 610 and the stationary ring 400 from the rinse holes 310 and cool both.

It should be noted that all directional indicators (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 (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.

Furthermore, descriptions such as those referred to herein as "first," "second," "a," and the like are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or an implicit indication of the number of features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical solutions of the embodiments of the present utility model may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present utility model.

Claims

1. A cartridge type mechanical seal with a rubber bellows, comprising: drive sleeve (100) and rubber bellows (200), rubber bellows (200) cover is located drive sleeve (100), rubber bellows (200) are including fixed section (210) and free section (220), fixed section (210) with drive sleeve (100) chucking, and rubber bellows (200) can follow drive sleeve (100) together rotate, the terminal surface of free section (220) has moving ring (610), free section (220) with between drive sleeve (100) and all reserve the clearance between moving ring (610) and the drive sleeve (100).

2. A cartridge mechanical seal with rubber bellows as in claim 1 wherein: still include sealing disk (300), sealing disk (300) are provided with the dish hole, drive sleeve (100) are passed the dish hole, be provided with quiet ring (400) in the dish hole, quiet ring (400) pass through the stop pin with sealing disk (300) are connected.

3. A cartridge mechanical seal with rubber bellows as in claim 2, wherein: the fixed section (210) is sleeved with a spring seat (500), the spring seat (500) is provided with a spring (510), the spring (510) is in abutting connection with the free section (220) and applies positive pressure to the movable ring (610) through the free section (220), and the movable ring (610) is attached to the surface of the stationary ring (400) under the action of positive pressure to form a sealing surface.

4. A cartridge mechanical seal with rubber bellows as in claim 3 wherein: the free section (220) comprises a telescopic part (221) and a support part (222), the telescopic part (221) is of a telescopic folding structure, one end of the telescopic part (221) is integrally connected with the fixed section (210) and the other end of the telescopic part is integrally connected with the support part (222), the support part (222) is sleeved with a movable ring seat (600), and the movable ring (610) is embedded in the movable ring seat (600).

5. A cartridge mechanical seal with a rubber bellows as in claim 4 wherein: the telescopic part (221) is close to one end of the fixed section (210) and is sleeved with a first check ring (230), a second check ring (240) is sleeved between the telescopic part (221) and the support part (222), and the spring (510) is in abutting connection with the first check ring (230).

6. A cartridge mechanical seal with rubber bellows as claimed in any one of claims 2 to 5, wherein: still include locating piece (700) and screw (710), drive sleeve (100) cover is equipped with clamping ring (110), locating piece (700) through screw (710) with clamping ring (110) are connected, and an end face of locating piece (700) with sealing disk (300) conflict is connected.

7. A cartridge mechanical seal with a rubber bellows as in claim 5 wherein: the sealing disk (300) is provided with a flushing hole (310), one end of the flushing hole (310) is positioned on the outer peripheral surface of the sealing disk (300) and the other end of the flushing hole faces the disk hole.

8. A cartridge mechanical seal with rubber bellows as in claim 3 wherein: the spring (510) is sleeved on the rubber corrugated pipe (200).