CN210715957U

CN210715957U - Labyrinth sealing device based on felt sealing ring

Info

Publication number: CN210715957U
Application number: CN201921708405.5U
Authority: CN
Inventors: 邓能华
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-13
Filing date: 2019-10-13
Publication date: 2020-06-09
Anticipated expiration: 2029-10-13

Abstract

The utility model provides a labyrinth sealing device based on a felt sealing ring, which consists of a movable ring and a static ring, wherein the movable ring comprises an inner movable ring, an outer movable ring, a movable connecting ring and a positioning ring, and the positioning ring is welded and fixed with a rotating cylinder; the static rings at least comprise an outer static ring, a middle static ring, an inner static ring and a static connecting ring which are arranged in the radial direction; the right side of the static connecting ring is provided with a fixing ring extending along the axial direction, and the fixing ring is fixedly connected with the equipment box body; the movable ring and the static ring are inserted in a staggered mode, the outer movable ring is located between the outer static ring and the middle static ring, the inner movable ring is located between the inner static ring and the middle static ring, the left end of the outer static ring is fixedly connected with a first felt sealing ring, and the left end of the middle static ring is fixedly connected with a second felt sealing ring. The device can carry out better sealing to the cavity that contains lubricating grease between a section of thick bamboo and the box rotates, prevents simultaneously that external dust from getting into sealed intracavity, and its simple structure, life are permanent.

Description

Labyrinth sealing device based on felt sealing ring

Technical Field

The utility model provides a sealing device especially provides a dustproof sealing device seals to a rotary drum for rotating in the barrel, belongs to mechanical seal technical field.

Background

The labyrinth seal is a device which is provided with a plurality of annular seal teeth arranged in sequence around a rotating cylinder, a series of closure gaps and expansion cavities are formed between the teeth, and the purpose of leakage resistance is achieved by the throttling effect generated when the sealed medium passes through the gaps of the zigzag labyrinth. The labyrinth seal has no solid contact because of the clearance between the rotor and the casing, and allows thermal expansion, so that the labyrinth seal is suitable for occasions of high temperature, high pressure and high rotating speed frequency, and is widely used for sealing shaft ends and stages of steam turbines, gas turbines, compressors and blowers.

In some occasions with strict use requirements, the labyrinth sealing device is used for achieving zero leakage of lubricating oil in the sealing cavity and preventing external pollutants such as dust from entering the sealing cavity, and in addition, the service life of the sealing element is also required to be higher. Felt seal is a commonly used sealing device, has excellent characteristics of oil contamination, oil absorption, oil return and the like as a sealing element, can keep constant sealing pressure under severe conditions or during abrasion, and can keep the surface from being polished during abrasion.

The sealing devices in the prior art are more in variety, complicated or simple in structure, and different in sealing performance. However, in general, it would be desirable to provide a seal assembly that has a simple construction, good sealing performance, and a long life, and combines the advantages of labyrinth seals and felt seals.

Disclosure of Invention

The utility model discloses the needle provides a labyrinth seal device based on felt sealing washer, and the device can carry out better sealing to the cavity that contains the lubricating grease of big viscosity between a rotation section of thick bamboo and the equipment box, prevents simultaneously that external dust from getting into sealed intracavity, and its simple structure, simple to operate, easy to maintain, life are permanent.

Realize the utility model discloses the technical scheme that above-mentioned purpose adopted does:

a labyrinth sealing device based on a felt sealing ring is arranged between a rotating cylinder and an equipment box body, the rotating cylinder is arranged in the equipment box body, a gap between the inside of the equipment box body and the rotating cylinder is a sealing cavity, the labyrinth sealing device based on the felt sealing ring is composed of a movable ring and a static ring, the cross section of the movable ring is C-shaped and comprises an inner movable ring, an outer movable ring and a movable connecting ring which are axially arranged, the left end of the inner movable ring axially extends to form a positioning ring, and the positioning ring is attached to the surface of the rotating cylinder and is welded and fixed with the rotating cylinder;

the section of the static ring is in an inverted E shape and at least comprises an outer static ring, a middle static ring, an inner static ring and a static connecting ring which are arranged in the radial direction; the right side of the static connecting ring is provided with a fixing ring extending along the axial direction, and the fixing ring is fixedly connected with the equipment box body through a bolt; the movable ring and the static ring are inserted in a staggered mode, the outer movable ring in the movable ring is located between the outer static ring and the middle static ring, the inner movable ring is located between the inner static ring and the middle static ring, the left end of the outer static ring is fixedly connected with a first felt sealing ring, the left end of the middle static ring is fixedly connected with a second felt sealing ring, the inner circular surface of the first felt sealing ring is in contact sealing with the outer circular surface of the outer movable ring, the outer circular surface of the second felt sealing ring is in contact sealing with the inner circular surface of the outer movable ring, and the inner circular surface of the second felt sealing ring is in contact sealing with the outer circular surface of the inner movable ring.

The left ends of the outer static ring and the middle static ring are both provided with turned edges inwards along the axial direction, the right sides of the first felt sealing ring and the second felt sealing ring are attached to the turned edges, the left sides of the first felt sealing ring and the second felt sealing ring are both provided with pressing plates, and the pressing plates and the turned edges are fixedly connected through bolts and fixedly clamp the first felt sealing ring and the second felt sealing ring.

And the end parts of the inner rotating ring and the outer rotating ring are both provided with an isolation gear ring along the radial direction.

Compared with the prior art, the utility model provides a labyrinth seal device based on felt sealing washer has following advantage: 1. the utility model discloses simple structure combines together labyrinth seal and felt seal, makes it possess labyrinth seal and felt seal's advantage simultaneously, and its simple structure, simple to operate, easy to maintain, life are permanent. 2. This application is through the interlude cooperation between rotating ring and the quiet ring for the interior disc of first felt sealing washer is sealed with the outer disc contact of outer rotating ring, and the outer disc of second felt sealing washer is sealed with the interior disc contact of outer rotating ring, and the interior disc of second felt sealing washer is sealed with the outer disc contact of interior rotating ring, consequently has splendid sealed effect.

Drawings

Fig. 1 is a schematic overall structure diagram of a labyrinth sealing device based on a felt sealing ring according to the present invention;

in the figure: 1-equipment box body, 2-rotary cylinder, 3-sealing cavity, 4-inner moving ring, 5-outer moving ring, 6-moving connecting ring, 7-positioning ring, 8-outer static ring, 9-middle static ring, 10-inner static ring, 11-static connecting ring, 12-fixed ring, 13-bolt, 14-first felt sealing ring, 15-second felt sealing ring, 16-flanging, 17-pressing plate and 18-isolation toothed ring.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

The utility model provides a labyrinth sealing device based on felt sealing washer's overall structure is shown in figure 1, installs between a rotation section of thick bamboo 2 and equipment box 1, it installs in the equipment box to rotate a section of thick bamboo, and the space between the equipment box is sealed chamber 3 inside and the rotation section of thick bamboo, labyrinth sealing device based on felt sealing washer comprises rotating ring and quiet ring, and the cross-section of rotating ring is the C style of calligraphy, including the interior rotating ring 4 of axial setting, outer rotating ring 5 and the moving-connection ring 6 of radial setting, the tip of interior rotating ring and outer rotating ring all is along radially being provided with isolation ring gear 18. The left end of the inner rotating ring extends along the axial direction and forms a positioning ring 7, and the positioning ring is attached to the surface of the rotating cylinder and is welded and fixed with the rotating cylinder.

The section of the static ring is in an inverted E shape and at least comprises an outer static ring 8, a middle static ring 9, an inner static ring 10 and a static connecting ring 11 which are arranged in the radial direction; a fixing ring 12 extending along the axial direction is arranged on the right side of the static connecting ring, and the fixing ring is fixedly connected with the equipment box body through a bolt 13; the movable ring and the static ring are inserted in a staggered mode, the outer movable ring in the movable ring is located between the outer static ring and the middle static ring, the inner movable ring is located between the inner static ring and the middle static ring, the left ends of the outer static ring and the middle static ring are both provided with a flanging 16 inwards along the axial direction, the left end of the outer static ring is fixedly connected with a first felt sealing ring 14, and the left end of the middle static ring is fixedly connected with a second felt sealing ring 15. The right sides of the first felt sealing ring and the second felt sealing ring are attached to the turned edges, the left sides of the first felt sealing ring and the second felt sealing ring are respectively provided with a pressing plate 17, and the pressing plate and the turned edges are fixedly connected through bolts 13 and are used for clamping and fixing the first felt sealing ring and the second felt sealing ring. The inner circle surface of the first felt sealing ring is in contact sealing with the outer circle surface of the outer rotating ring, the outer circle surface of the second felt sealing ring is in contact sealing with the inner circle surface of the outer rotating ring, and the inner circle surface of the second felt sealing ring is in contact sealing with the outer circle surface of the inner rotating ring. First felt sealing washer and second felt sealing washer have formed three sealed lines of defence in this application altogether, combine labyrinth seal's sealing characteristic itself again, consequently the labyrinth seal device based on felt sealing washer that this application provided has splendid sealed dustproof effect.

Claims

1. The utility model provides a labyrinth seal device based on felt sealing washer, installs between a rotation section of thick bamboo and equipment box, a rotation section of thick bamboo is installed in the equipment box, and the equipment box is inside and the space between the rotation section of thick bamboo be sealed chamber, its characterized in that: the labyrinth sealing device based on the felt sealing ring comprises a movable ring and a stationary ring, wherein the section of the movable ring is C-shaped and comprises an inner movable ring, an outer movable ring and a movable connecting ring which are axially arranged, the left end of the inner movable ring axially extends to form a positioning ring, and the positioning ring is attached to the surface of the rotating cylinder and is welded and fixed with the rotating cylinder;

2. The felt seal ring based labyrinth sealing device according to claim 1, wherein: the left ends of the outer static ring and the middle static ring are both provided with turned edges inwards along the axial direction, the right sides of the first felt sealing ring and the second felt sealing ring are attached to the turned edges, the left sides of the first felt sealing ring and the second felt sealing ring are both provided with pressing plates, and the pressing plates and the turned edges are fixedly connected through bolts and fixedly clamp the first felt sealing ring and the second felt sealing ring.

3. The felt seal ring based labyrinth sealing device according to claim 1, wherein: and the end parts of the inner rotating ring and the outer rotating ring are both provided with an isolation gear ring along the radial direction.