CN214196757U

CN214196757U - Novel single-spring rubber corrugated pipe double-end-face mechanical sealing device

Info

Publication number: CN214196757U
Application number: CN202023244023.7U
Authority: CN
Inventors: 蒋海云; 任杰; 张鹏宇
Original assignee: Shandong Shuanglun Co Ltd
Current assignee: Shandong Shuanglun Co Ltd
Priority date: 2020-12-29
Filing date: 2020-12-29
Publication date: 2021-09-14
Anticipated expiration: 2030-12-29

Abstract

The utility model relates to the technical field of fluid machinery sewage pump shaft seal, in particular to a novel single-spring rubber bellows double-end-face mechanical sealing device, which comprises a pump shaft, wherein a spring is sleeved on the pump shaft, the two ends of the spring are symmetrically provided with a bellows, the bellows is provided with a pressing ring and a movable ring seat, the pressing ring is provided with a stop block, the bellows is provided with a groove, the pressing ring is embedded in the groove and is fixedly connected with the bellows, the stop block is positioned at the upper end of the pressing ring, one side of the stop block is propped against one end of the spring, the other side of the stop block is propped against the movable ring seat, the movable ring seat is fixedly connected with the bellows, the bellows comprises a limiting section and a fixed section, the outer diameter of the limiting section is smaller than that of the fixed section, the pressing ring is fixedly connected with the limiting section, one end of the spring is arranged on the pressing ring and propped against one side of the stop block, the movable ring seat is L-shaped, the movable ring seat comprises a vertical plate and a transverse plate, can effectively transmit torque, prevent the corrugated pipe from being torn, and has the advantages of reliable sealing, long service life, convenient installation and the like.

Description

Novel single-spring rubber corrugated pipe double-end-face mechanical sealing device

Technical Field

The utility model relates to a fluid machinery sewage pump bearing seal technical field specifically indicates a novel single spring rubber bellows double mechanical seal device.

Background

As is well known, the single-spring rubber bellows double-end-face mechanical seal is mostly applied to a shaft seal structure of a submersible sewage pump, the rubber bellows and a shaft are in interference fit, and the rubber bellows plays a role in transmitting torque and sealing the shaft.

The existing double-end face machine seal structure is characterized in that an O-shaped ring, a static ring, a movable ring seat, a pressure ring, a rubber corrugated pipe and a spring are arranged at a medium end, the rubber corrugated pipe, the pressure ring, the movable ring seat, the static ring and an L-shaped rubber pad are arranged at an atmosphere end, and two ends of a machine seal are connected together through the spring. When the pump operates, the pump shaft passes through rubber bellows and gives the clamping ring with the moment of torsion transmission, and the clamping ring rethread draw-in groove gives the rotating ring subassembly with it transmission to play sealed effect, the shortcoming of this kind of structure is: when the medium end pressure is too high, the gap between the movable ring and the shaft can generate an axial force towards the atmosphere end, when the axial force is greater than the friction force between the rubber corrugated pipe and the shaft, the corrugated pipe is displaced and pushed to one side of the atmosphere end, after the corrugated pipe moves to a certain degree, the clamping groove of the pressing ring can be separated from the shifting fork of the movable ring seat, the transmission torque can only depend on the rubber corrugated pipe at the moment, the operation characteristic of the sewage pump is that the sewage pump is frequently started and stopped, the corrugated pipe can frequently receive the torsional force in the positive and negative directions, the operation characteristic is repeated, particularly, the torque is very large in the starting moment, the rubber corrugated pipe is very easy to tear, and the mechanical seal failure is caused.

Disclosure of Invention

The utility model aims at solving prior art not enough, provide one kind can adapt to medium pressure big, open and stop frequent operating condition, can effectively transmit the moment of torsion, prevent that the bellows from tearing, sealed reliable, long service life, simple to operate's novel single spring rubber bellows double mechanical seal device.

In order to achieve the above object, the utility model adopts the following technical scheme:

the utility model provides a novel single spring rubber bellows double mechanical seal device, includes the pump shaft, the cover has the spring on the pump shaft, spring both ends symmetry is equipped with the bellows, bellows and pump shaft fixed connection, be equipped with clamping ring and rotating ring seat, its characterized in that on the bellows: be equipped with the recess on the bellows, the clamping ring inlays in the recess with bellows fixed connection, be equipped with the dog on the clamping ring, the dog is located the clamping ring upper end, dog lower extreme and clamping ring fixed connection, the dog one side is leaned on with spring one end counterbalance, and the another side offsets with the rotating ring seat and leans on, rotating ring seat and bellows fixed connection to do benefit to when the pump starts, the dog can be supported to the spring, thereby control bellows makes it can not remove along with medium pressure's promotion, prevents that the bellows from tearing.

The corrugated pipe of the utility model comprises a limiting section and a fixing section, one end of the limiting section faces a spring, the other end is fixedly connected with the fixing section, the outer diameter of the limiting section is smaller than that of the fixing section, the groove is positioned on the outer wall of the limiting section, the pressing ring is fixedly connected with the limiting section, one end of the spring is arranged on the pressing ring and abuts against one side of a stop block, the movable ring seat is L-shaped, the movable ring seat comprises a vertical plate and a transverse plate, one side of the vertical plate is fixedly connected with the other side of the stop block, the other side of the vertical plate abuts against the end surface of the fixing section and is fixedly connected with the fixing section, the lower end of the vertical plate abuts against the limiting section, the upper end of the vertical plate is fixedly connected with the transverse plate, so as to facilitate the spring to abut against the stop block, the stop block is fixedly connected with the vertical plate, the vertical plate is fixedly connected with the movable ring seat, the movable ring seat is fixedly connected with the corrugated pipe, thereby controlling the corrugated pipe to prevent the corrugated pipe from moving along with the pushing of medium pressure, preventing the corrugated pipe from being torn.

The utility model discloses owing to adopt above-mentioned structure, have can adapt to medium pressure big, open and stop frequent operating condition, can effectively transmit the moment of torsion, prevent advantages such as bellows tear, sealed reliable, long service life, simple to operate.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is an enlarged view of a portion a in fig. 1 according to the present invention.

Reference numerals: pump shaft 1, spring 2, bellows 3, clamping ring 4, movable ring seat 5, dog 6, spacing 7, canned paragraph 8, riser 9, diaphragm 10.

Detailed Description

The following describes in further detail embodiments of the present invention with reference to the accompanying drawings.

The utility model provides a novel single spring rubber bellows double mechanical seal device, includes pump shaft 1, the cover has spring 2 on the

pump shaft

1, 2 both ends symmetries of spring are equipped with bellows 3,

bellows

3 and 1 fixed connection of pump shaft, be equipped with clamping ring 4 and rotating ring seat 5 on the bellows 3, its characterized in that: be equipped with the recess on the bellows 3, clamping ring 4 inlays in the recess with 3 fixed connection of bellows, be equipped with dog 6 on the clamping ring 4, dog 6 is located clamping ring 4 upper end, 6 lower extremes of dog and 4 fixed connection of clamping ring, 6 one sides of dog are supported with 2 one end offsets of spring and are leaned on, and the another side offsets with movable ring seat 5 and lean on,

movable ring seat

5 and 3 fixed connection of bellows to do benefit to when the pump starts, the dog can be supported to the spring, thereby control bellows makes it can not remove along with medium pressure's promotion, prevents that the bellows from tearing.

The corrugated pipe 3 of the utility model comprises a limiting section 7 and a fixing section 8, one end of the limiting section 7 faces a spring 2, the other end is fixedly connected with the fixing section 8, the outer diameter of the limiting section 7 is smaller than that of the fixing section 8, the groove is positioned on the outer wall of the limiting section 7, a press ring 4 is fixedly connected with the limiting section 7, one end of the spring 2 is arranged on the press ring 4 and abuts against one side of a stop 6, a movable ring seat 5 is L-shaped, the movable ring seat 5 comprises a vertical plate 9 and a transverse plate 10, one side of the vertical plate 9 abuts against and is fixed with the other side of the stop 6, the other side of the vertical plate 9 abuts against the end surface of the fixing section 8 and is fixedly connected with the fixing section 8, the lower end of the vertical plate 9 abuts against the limiting section 7, the upper end is fixedly connected with the transverse plate 10, the transverse plate 10 is fixedly connected with the fixing section 8 so as to be beneficial to the spring abutting against the stop, the stop is fixedly connected with the vertical plate, and the movable ring seat is fixedly connected with the vertical plate, the movable ring seat is fixedly connected with the corrugated pipe, so that the corrugated pipe is controlled not to move along with the pushing of the medium pressure, and the corrugated pipe is prevented from being torn.

Referring to fig. 1 and 2, the left end of the pump shaft is an atmosphere end, the right end of the pump shaft is a medium end, the pump shaft is sleeved with a spring, the right end of the spring is provided with a corrugated pipe, a movable ring seat, a shifting fork, a movable ring, an O-shaped ring and a right cavity, the left end of the spring is provided with a corrugated pipe, a movable ring seat, a shifting fork, a movable ring, a stationary ring, an L-shaped rubber pad and a left cavity, the shifting fork is positioned on the movable ring seat, the shifting fork is matched with a clamping groove on the compression ring to transmit torque, one end of the movable ring is positioned in the movable ring seat, the other end of the movable ring is opposite to the stationary ring, the stationary ring is positioned in the O-shaped ring or the L-shaped rubber pad, the movable ring and the movable ring seat rotate along with the rotation of the pump shaft, the stationary ring is stationary when the pump shaft rotates, the structure is the same as the prior art, the pressing ring is embedded in the groove and fixedly connected with the corrugated pipe, the compression ring is fixedly provided with the check blocks on the compression ring, the two ends of the spring are abutted against the check blocks on the two sides of the compression ring, thereby the bellows of control both sides, make the bellows of both sides all can not remove when receiving medium pressure's promotion, even if the sewage pump frequently opens and stops, the spring both ends support all the time on the dog, effectively prevent the bellows from being torn, during the use, the magnitude of the reverse pressure that bears through the medium end calculates the spring specific pressure, select the spring that is fit for this use operating mode can, when the pump starts, thereby the bellows that the dog control spring both sides on the clamping ring of both sides can be supported at the spring both ends makes it can not remove along with medium pressure's promotion, can guarantee the draw-in groove of clamping ring and the effective cooperation of shift fork of rotating ring seat, play the effect of transmission moment of torsion, prevent simultaneously that the bellows from being torn.

Claims

1. The utility model provides a novel single spring rubber bellows double mechanical seal device, includes the pump shaft, the cover has the spring on the pump shaft, spring both ends symmetry is equipped with the bellows, bellows and pump shaft fixed connection, be equipped with clamping ring and rotating ring seat, its characterized in that on the bellows: the corrugated pipe is provided with a groove, the pressing ring is embedded in the groove and fixedly connected with the corrugated pipe, the pressing ring is provided with a stop dog, the stop dog is positioned at the upper end of the pressing ring, the lower end of the stop dog is fixedly connected with the pressing ring, one side of the stop dog abuts against one end of the spring, the other side of the stop dog abuts against the movable ring seat, and the movable ring seat is fixedly connected with the corrugated pipe.

2. The novel single-spring rubber bellows double-end-face mechanical sealing device according to claim 1, characterized in that: the bellows includes spacing section and canned paragraph, spacing section one end is towards the spring, the other end and canned paragraph fixed connection, the external diameter of spacing section is less than the external diameter of canned paragraph, the recess is located spacing section outer wall, clamping ring and spacing section fixed connection, spring one end is arranged in on the clamping ring and is leaned on with dog one side counterbalance, the rotating ring seat is the L type, and the rotating ring seat includes riser and diaphragm, riser one side and dog another side fixed connection, and the riser another side offsets with the terminal surface of canned paragraph and leans on and with canned paragraph fixed connection, the riser lower extreme offsets with spacing section and leans on, upper end and diaphragm fixed connection, diaphragm and canned paragraph fixed connection.