CN213744917U - Rotary support sealing device with spring piece - Google Patents

Abstract

The utility model provides a rotary supporting and sealing device with a spring piece, which consists of a supporting part and a sealing part which are connected into a whole, wherein the supporting part is fixedly connected with an end cover, the supporting part comprises a fixing ring arranged along the axial direction and a main ring arranged along the radial direction, the main ring is positioned in a groove arranged on the side wall of the end cover, and the fixing ring is arranged in the end cover through interference fit; the cross-section of sealing portion is "eight" style of calligraphy, including the seal lip that sets up towards seal chamber one side slope and the dustproof lip that sets up towards external one side slope, the outer disc of seal lip and dustproof lip all connects on the interior disc of main ring, and three formula structure as an organic whole and three's cross-section are "people" font, and the interior circumference of seal lip and dustproof lip all contacts with the axis of rotation and seals. The device can carry out better sealed to the cavity that contains lubricating grease between axis of rotation and the box, and its simple structure, simple to operate, easy to maintain, life are permanent.

Description

Rotary support sealing device with spring piece

Technical Field

The utility model provides a sealing device especially provides a sealing device who is arranged in the axis of rotation to seal the axis of rotation, 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 shaft, a series of cut-off 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 sealing device not only needs to achieve zero leakage of lubricating oil in the sealing cavity, but also needs to achieve the purpose of preventing external pollutants from entering the sealing cavity, and in addition, the sealing device also has higher requirements on the service life of the sealing element.

The sealing devices in the prior art are more in variety, complicated or simple in structure, and different in sealing performance. In general, however, it would be desirable to provide a seal assembly that is simple in construction, has good sealing properties, and has a long useful life.

Disclosure of Invention

The utility model discloses a take gyration support sealing device of spring leaf is provided to the needle, and the device can carry out better sealed to the cavity that contains lubricating grease between axis of rotation and the box, 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 rotary supporting and sealing device with spring pieces is arranged between a rotary shaft and an end cover, the rotary shaft is arranged in the end cover and extends out of the end cover, a sealing cavity is arranged in a gap between the inner part of the end cover and the rotary shaft, the rotary supporting and sealing device with the spring pieces is of a full-circle structure or an opening structure and consists of a supporting part and a sealing part which are connected into a whole, the supporting part is fixedly connected with the end cover, the supporting part comprises a fixing ring arranged along the axial direction and a main ring arranged along the radial direction, the main ring is arranged in a groove arranged on the side wall of the end cover, one end of the fixing ring is connected with the main ring into a whole, the fixing ring extends into the inner part of the end cover from the groove, and the fixing ring is arranged in the inner part of the end cover in an interference fit manner;

the cross section of the sealing part is in a shape of Chinese character 'ba', the sealing part comprises a sealing lip which is obliquely arranged towards one side of the sealing cavity and a dust-proof lip which is obliquely arranged towards one side of the outside, the outer circular surfaces of the sealing lip and the dust-proof lip are connected to the inner circular surface of the main ring, the sealing lip and the dust-proof lip are in an integrated structure, the cross sections of the sealing lip and the dust-proof lip are in a shape of Chinese character 'ren', and the inner circumferences of the sealing lip and the dust-proof lip are in contact sealing with the rotating shaft; the sealing lip is provided with a spring piece, the spring piece is annular as a whole, the section of the spring piece is C-shaped, the spring piece is arranged along the inner circumference of the fixing ring, the side surface of the main ring and the outer circumference of the sealing lip and furled towards the direction of the rotating shaft, and the sealing lip is always in close contact with the rotating shaft under the furled elasticity of the spring piece.

An annular first bulge is arranged on the outer circumference of the fixing ring.

And the inner circumference of the fixing ring is provided with a second annular bulge.

Compared with the prior art, the utility model provides a take gyration of spring leaf to support sealing device has following advantage: 1. the utility model discloses simple structure, through the sealed between sealing and the axis of rotation, the interior circumference of seal lip and dust lip promptly and the contact of axis of rotation and realize sealing. 2. The utility model discloses well supporting part is fixed through the interference fit between solid fixed ring and the end cover, and whole gyration that takes the spring leaf simultaneously supports sealing device and can set up to whole circle formula structure or open type structure, consequently the installation with maintain the convenience. 3. The utility model discloses in there is the spring leaf the embedding in seal lip, the spring leaf makes seal lip remain throughout and hugs closely the state, even if lead to seal lip to produce wearing and tearing through long-time use, because the expansion of spring leaf or draw in elasticity in, also can make seal lip all the time with axis of rotation in close contact with to guarantee sealed effect.

Drawings

Fig. 1 is a schematic view of the overall structure of the rotary supporting and sealing device with spring plate according to the present invention;

in the figure: the sealing structure comprises an end cover 1, a rotating shaft 2, a sealing cavity 3, a fixing ring 4, a main ring 5, a second bulge 6, a first bulge 7, a sealing lip 8, a dust lip 9 and a spring piece 10.

Detailed Description

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

The utility model provides a take gyration of spring leaf to support sealing device's overall structure is shown in figure 1, installs between axis of rotation 2 and end cover 1, the axis of rotation is installed in the end cover and is stretched out from the end cover, and the space between the inside and the axis of rotation of end cover is sealed chamber 3, take gyration of spring leaf to support sealing device for whole circle formula structure or open type structure, constitute by connecting supporting part and sealing as an organic whole, supporting part and end cover fixed connection. The supporting part includes along the solid fixed ring 4 of axial setting and along the main ring 5 of radial setting, the main ring is located the recess that sets up on the end cover lateral wall, and solid fixed ring's one end is connected as an organic wholely with the main ring, and gu fixed ring is deepened to the inside of end cover by the recess, gu fixed ring installs in the inside of end cover through interference fit, gu be provided with annular first arch 7 on fixed ring's the outer circumference, gu be provided with annular second arch 6 on fixed ring's the interior circumference. The fixing ring ensures interference fit and fastening with the mounting hole in the end cover through the first protrusion and the second protrusion.

The cross-section of sealing portion is "eight" style of calligraphy, including the seal lip 8 that sets up towards seal chamber one side slope and the dustproof lip 9 that sets up towards external one side slope, the outer disc of seal lip and dustproof lip all connects on the interior disc of main ring, and three formula structure as an organic whole and three's cross-section are "people" font, and the interior circumference of seal lip and dustproof lip all contacts with the axis of rotation and seals. The sealing lip is provided with a spring piece 10, the spring piece is annular as a whole, the section of the spring piece is C-shaped, the spring piece is arranged along the inner circumference of the fixing ring, the side surface of the main ring and the outer circumference of the sealing lip and furled towards the direction of the rotating shaft, and the sealing lip is always in close contact with the rotating shaft under the furled elasticity of the spring piece.

Claims (3)

1. The utility model provides a take gyration of spring leaf to support sealing device, installs between axis of rotation and end cover, the axis of rotation is installed in the end cover and is stretched out from the end cover, and the space between the inside and axis of rotation of end cover is sealed chamber, its characterized in that: the rotary supporting and sealing device with the spring piece is of a whole-circle structure or an opening structure and consists of a supporting part and a sealing part which are connected into a whole, the supporting part is fixedly connected with the end cover, the supporting part comprises a fixing ring arranged along the axial direction and a main ring arranged along the radial direction, the main ring is positioned in a groove arranged on the side wall of the end cover, one end of the fixing ring is connected with the main ring into a whole, the fixing ring extends into the end cover from the groove, and the fixing ring is arranged in the end cover in an interference fit manner;

the cross section of the sealing part is in a shape of Chinese character 'ba', the sealing part comprises a sealing lip which is obliquely arranged towards one side of the sealing cavity and a dust-proof lip which is obliquely arranged towards one side of the outside, the outer circular surfaces of the sealing lip and the dust-proof lip are connected to the inner circular surface of the main ring, the sealing lip and the dust-proof lip are in an integrated structure, the cross sections of the sealing lip and the dust-proof lip are in a shape of Chinese character 'ren', and the inner circumferences of the sealing lip and the dust-proof lip are in contact sealing with the rotating shaft; the sealing lip is provided with a spring piece, the spring piece is annular as a whole, the section of the spring piece is C-shaped, the spring piece is arranged along the inner circumference of the fixing ring, the side surface of the main ring and the outer circumference of the sealing lip and furled towards the direction of the rotating shaft, and the sealing lip is always in close contact with the rotating shaft under the furled elasticity of the spring piece.

2. The leaf spring slew support seal assembly of claim 1 further comprising: an annular first bulge is arranged on the outer circumference of the fixing ring.

3. The leaf spring slew support seal assembly of claim 1 further comprising: and the inner circumference of the fixing ring is provided with a second annular bulge.

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