CN213807768U

CN213807768U - Nested biax sealing device between axle

Info

Publication number: CN213807768U
Application number: CN202022915885.1U
Authority: CN
Inventors: 方昌鼎
Original assignee: Tianjin Jingshicheng Technology Co ltd
Current assignee: Tianjin Jingshicheng Technology Co ltd
Priority date: 2020-12-08
Filing date: 2020-12-08
Publication date: 2021-07-27
Anticipated expiration: 2030-12-08

Abstract

The utility model discloses an interaxial sealing device of nested formula biax, including intermediary's bearing, interior sealed tube and external sealed tube, the outside of intermediary's bearing rotates the cover and is equipped with the low-pressure axle, the outside of low-pressure axle rotates the cover and is equipped with the high-pressure axle, the outside fixed suit of low-pressure axle the interior sealed tube, the activity suit of interior sealed tube the external sealed tube, be equipped with sealed chamber between interior sealed tube and the external sealed tube, the surface of interior sealed tube all fixed mounting has the rubber fixed block, the upper end fixed mounting of rubber fixed block has the spring, the top fixed mounting of spring has the arc shell fragment, the upper end fixed connection of arc shell fragment the external sealed tube; this sealing device between axle of nested formula biax sets up inside and outside two-layer sealed tube between high, low pressure axle, and the arc shell fragment through scalable support formula is buffering strutting arrangement, and the many diaxons of reinforcing seal, prevent to lead to the seal cover deformation because of dismantling, influence efficiency.

Description

Nested biax sealing device between axle

Technical Field

The utility model relates to an interaxial sealing technical field specifically is an interaxial sealing device of nested formula biax.

Background

In a double-rotor aero-engine or a gas turbine, a high-pressure rotor and a low-pressure rotor are connected through an intermediate bearing, two shafts are sleeved together, the diameter of the shaft with the large diameter is small, the rotating speed of the shaft with the large diameter is high, namely a high-pressure shaft, and the rotating speed of the shaft with the small diameter is low, namely a low-pressure shaft, the intermediate bearing is positioned between the high-pressure shaft and the low-pressure shaft, the intermediate bearing plays a supporting role, the sealing of the intermediate bearing is shaft sealing, the shaft sealing is difficult to process due to the special space size requirement and the working condition requirement of the shaft sealing, and the shaft sealing device is used for continuously updating along with the continuous development of the mechanical industry.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an interaxial sealing device of nested formula biax to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides an interaxial sealing device of nested formula biax, includes intermediary bearing, inner seal pipe and external seal pipe, the outside of intermediary bearing is rotated the cover and is equipped with the low-pressure axle, the outside of low-pressure axle is rotated the cover and is equipped with the high-pressure axle, the external fixation suit of low-pressure axle the inner seal pipe, the outside movable suit of inner seal pipe the external seal pipe, be equipped with sealed chamber between inner seal pipe and the external seal pipe, the equal fixed mounting in surface of inner seal pipe has the rubber fixed block, the upper end fixed mounting of rubber fixed block has the spring, the top fixed mounting of spring has the arc shell fragment, the upper end fixed connection of arc shell fragment the external seal pipe.

Preferably, a sealing sleeve a is fixedly sleeved outside the outer sealing pipe, and the high-pressure shaft is rotatably sleeved outside the sealing sleeve a.

Preferably, a sealing sleeve b is fixedly sleeved between the intermediate bearing and the inner sealing tube.

Preferably, both ends of the high-pressure shaft are provided with rotating ports, and the rotating ports are sleeved outside the low-pressure shaft in a rotating mode.

Preferably, the material of the sealing sleeve a is a high-temperature resistant rubber material.

Preferably, the material of the sealing sleeve b is high-temperature-resistant silica gel.

Compared with the prior art, the beneficial effects of the utility model are that: this sealing device between axle of nested formula biax sets up inside and outside two-layer sealed tube between high, low pressure axle, and the arc shell fragment through scalable support formula is buffering strutting arrangement, and the many diaxons of reinforcing seal, prevent to lead to the seal cover deformation because of dismantling, influence efficiency.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a side view of the present invention.

In the figure: the device comprises a medium bearing 1, a rotating port 2, a high-pressure shaft 3, a sealing cavity 4, sealing sleeves 5 a, 6 outer sealing pipes, 7 inner sealing pipes, 8 low-pressure shafts, 9 springs, 10 arc-shaped elastic sheets, 11 rubber fixing blocks and 12 sealing sleeves b.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: an inter-shaft sealing device with nested double shafts comprises an intermediary bearing 1, an inner sealing pipe 7 and an outer sealing pipe 6, wherein a low-pressure shaft 8 is sleeved outside the intermediary bearing 1 in a rotating mode, a high-pressure shaft 3 is sleeved outside the low-pressure shaft 8 in a rotating mode, the inner sealing pipe 7 is sleeved outside the low-pressure shaft 8 in a fixed mode, the outer sealing pipe 6 is sleeved on the inner sealing pipe 7 in a movable mode, a sealing cavity 4 is formed between the inner sealing pipe 7 and the outer sealing pipe 6, rubber fixing blocks 11 are fixedly installed on the outer surface of the inner sealing pipe 7, springs 9 are fixedly installed at the upper ends of the rubber fixing blocks 11, arc-shaped elastic pieces 10 are fixedly installed at the top ends of the springs 9, and the upper ends of the arc-shaped elastic pieces 10 are fixedly connected with the outer sealing pipe 6; specifically, the medium bearing 1 is a medium connecting the high-pressure shaft and the low-pressure shaft, the medium bearing, the high-pressure shaft and the low-pressure shaft are conventional double-shaft devices, the inner sealing pipe 7 is fixedly sleeved on the outer circle surface of the low-pressure shaft between the low-pressure shaft 8 and the intermediate bearing, the outer sealing pipe 7 is movably sleeved outside the inner sealing pipe, the sealing cavity 5 is arranged between the inner sealing tube and the outer sealing tube, the rubber fixing blocks 11 are fixedly arranged on the outer surface of the inner sealing tube 7 along the circumference, the upper end of the rubber fixed block 11 is fixedly provided with the spring 9, the upper end of the spring is fixedly provided with the arc-shaped elastic sheet 1, the upper end of the arc-shaped elastic sheet is fixedly connected with the outer sealing pipe 6, through the cooperation of spring with the arc shell fragment, pack the maximize constantly and support external sealing pipe 6 prevents to warp.

A sealing sleeve a5 is fixedly sleeved outside the outer sealing pipe 6, and the high-pressure shaft 3 is rotatably sleeved outside the sealing sleeve a 5; specifically, the sealing sleeve a5 is fixedly sleeved outside the outer sealing tube 6, that is, the sealing sleeve a seals between the high-pressure shaft 3 and the outer sealing tube.

A sealing sleeve b12 is fixedly sleeved between the intermediate bearing 1 and the inner sealing tube 7; specifically, the intermediate bearing 1 is positioned between the inner seal pipes 7 and is fixedly sleeved with the seal sleeve b11, that is, the intermediate bearing and the inner seal pipes are sealed by the seal sleeve b.

The sealing sleeve a5 is made of high-temperature-resistant rubber; the material of seal cover b11 is high temperature resistant silica gel.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. The utility model provides an interaxial sealing device of nested formula biax, includes intermediary bearing (1), interior sealed tube (7) and outer sealed tube (6), its characterized in that: the utility model discloses a high-pressure sealing device, including intermediary bearing (1), low-pressure shaft (8) are equipped with to the outside rotation cover of intermediary bearing (1), the outside rotation cover of low-pressure shaft (8) is equipped with high-pressure shaft (3), the fixed suit in outside of low-pressure shaft (8) interior sealed tube (7), the outside activity suit of interior sealed tube (7) external seal pipe (6), be equipped with between interior sealed tube (7) and external seal pipe (6) sealed chamber (4), the equal fixed mounting in surface of interior sealed tube (7) has rubber fixed block (11), the upper end fixed mounting of rubber fixed block (11) has spring (9), the top fixed mounting of spring (9) has arc shell fragment (10), the upper end fixed connection of arc shell fragment (10) external seal pipe (6).

2. A nested biaxial shaft-to-shaft sealing device as defined in claim 1, wherein: the outer sealing pipe (6) is fixedly sleeved with a sealing sleeve a (5), and the high-pressure shaft (3) is rotatably sleeved outside the sealing sleeve a (5).

3. A nested biaxial shaft-to-shaft sealing device as defined in claim 1, wherein: a sealing sleeve b (12) is fixedly sleeved between the intermediary bearing (1) and the inner sealing pipe (7).

4. A nested biaxial shaft-to-shaft sealing device as defined in claim 1, wherein: both ends of the high-pressure shaft (3) are provided with rotating ports (2), and the rotating ports are sleeved outside the low-pressure shaft (8).

5. A nested biaxial shaft-to-shaft sealing device as defined in claim 2, wherein: the material of the sealing sleeve a (5) is a high-temperature-resistant rubber material.

6. A nested biaxial shaft-to-shaft sealing device as defined in claim 3, wherein: the material of seal cover b (12) is high temperature resistant silica gel.