CN203532746U

CN203532746U - Combined seal mechanical structure

Info

Publication number: CN203532746U
Application number: CN201320670810.9U
Authority: CN
Inventors: 于东洋; 李应生; 赵宇; 邢惠斌; 常山
Original assignee: 703th Research Institute of CSIC
Current assignee: Harbin Guanghan Power Technology Development Co ltd
Priority date: 2013-10-29
Filing date: 2013-10-29
Publication date: 2014-04-09
Anticipated expiration: 2023-10-29

Abstract

A combined seal mechanical structure is characterized in that operating lubrication oil is directly or indirectly sprayed to the position of a centrifugal oil throwing seal structure, part of the lubrication oil is retained by a mechanical casing at the position of the centrifugal oil throwing seal structure, and the lubrication oil passing through the mechanical casing and a rotation shaft is centrifuged by an oil throwing ring to act on the mechanical casing and is discharged through an oil return port in the bottom of the mechanical casing. The lubrication oil through all seal structures is finally forced to be collected by an oil return seal structure to be discharged out of the mechanical casing. The structure has the advantages that leakage of the lubrication oil in the static state and the rotation state can be prevented effectively, a non-leakage combined seal structure can be achieved, and the structure is simple and convenient to achieve.

Description

A kind of combination seal mechanical structure

technical field:

The utility model relates to mechanical equipment technical field, refers in particular to a kind of combination seal mechanical structure.

background technique:

It at industry oil seepages such as food machinery, water treatments, is the important indicator of evaluating mechanical quality.Seepage can cause very large threat to machine security reliable operation, and at present, the sealing configuration generally adopting mainly contains the non-contact sealings such as the contact sealings such as seal ring, piston ring and labyrinth seal, centrifugal seal.Adopt separately above-mentioned any seal form to be all difficult to realize leak free effect.The utility model structure applications, in the rotating machinery of horizontal arrangement, especially requires under very harsh environment more applicable to oil seepage amount.

model utility content:

The purpose of this utility model is to provide a kind of combination seal mechanical structure, overcomes the problem of machinery oil seepage.

The purpose of this utility model realizes as follows: a kind of combination seal mechanical structure, mainly by mechanical hull, disc, lip seal, spiral seal, running shaft, formed, it is characterized in that: its working mechanism is, working lubrication oil is directly or indirectly ejected into the centrifugal oil seal structure place of getting rid of, by the centrifugal lubricant oil that gets rid of the mechanical hull stop portions at oil seal structure place, from the lubricant oil passing through between mechanical hull and running shaft, by disc centrifugal action, on mechanical hull, then discharged by the spill port of mechanical hull bottom; A small amount of remaining lubricating oil and lubricating oil mixing air to external diffusion are touched the obstruct of formula sealing configuration, there is less gap in lip seal and running shaft, the lubricating oil mixing air of minute quantity continues to external diffusion, spiral seal structure is introduced into contact type sealing structure place by the air outside mechanical hull, produce positive pressure and stop the diffusion of lubricating oil mixing air, through cooled a small amount of lubricant oil, via the spill port of mechanical hull bottom, discharge; Lubricant oil via each seal structures is finally forced to after oil return sealing configuration is collected discharge mechanical hull.

The beneficial effects of the utility model are, can effectively prevent under state of rest, the oil leak under rotation status, can reach leak free combined sealing structure, and simple in structure, are convenient to realize.

accompanying drawing explanation:

Accompanying drawing 1 is the utility model structural representation.

In figure: 1. mechanical hull, 2. disc, 3. lip seal, 4. spiral seal, 5. running shaft, A. forces oil return sealing configuration, the centrifugal oil seal structure that gets rid of of B., C. contact type sealing structure, D. spiral seal structure.

embodiment:

With reference to accompanying drawing 1, a kind of combination seal mechanical structure, mainly by mechanical hull, disc, lip seal, spiral seal, running shaft, formed, it is characterized in that: its working mechanism is, working lubrication oil is directly or indirectly ejected into the centrifugal oil seal structure B place of getting rid of, by the centrifugal lubricant oil that gets rid of mechanical hull 1 stop portions at oil seal structure B place, from the lubricant oil passing through between mechanical hull and running shaft, by disc 2 centrifugal actions, on mechanical hull 1, then discharged by the spill port of mechanical hull 1 bottom; A small amount of remaining lubricating oil and lubricating oil mixing air to external diffusion are touched formula sealing configuration C obstruct, there is less gap with running shaft 5 in lip seal 3, the lubricating oil mixing air of minute quantity continues to external diffusion, spiral seal structure D is introduced into contact type sealing structure C place by the air outside mechanical hull 1, produce positive pressure and stop the diffusion of lubricating oil mixing air, through cooled a small amount of lubricant oil, via the spill port of mechanical hull 1 bottom, discharge; Lubricant oil via each seal structures is finally forced to after oil return sealing configuration A collects discharge mechanical hull 1.

This model utility adopts four kinds of different sealing techniquies.The first is for forcing oil return, and the lubricant oil after extensive work forces to discharge body by spill port; The second seals by the mode of the disc centrifugal oil swirling on running shaft, intercepts part lubricating oil, discharges casing; The third is the lip seal configuration that the oil leakage that prevents lubricating oil mixed gas adopts contact-type; The 4th kind is contactless spiral seal structure, mainly prevents from not completely cutting off the lubricating oil mixed gas seepage of falling and a small amount of lubrication leakage producing under dynamic rotary state.

Claims

1. a combination seal mechanical structure, mainly by mechanical hull, disc, lip seal, spiral seal, running shaft, formed, it is characterized in that: its working mechanism is, working lubrication oil is directly or indirectly ejected into the centrifugal oil seal structure (B) that gets rid of and locates, by the centrifugal lubricant oil that gets rid of mechanical hull (1) stop portions that oil seal structure (B) locates, from the lubricant oil passing through between mechanical hull and running shaft, upper in mechanical hull (1) by disc (2) centrifugal action, then discharge by the spill port of mechanical hull (1) bottom; A small amount of remaining lubricating oil and lubricating oil mixing air to external diffusion are touched formula sealing configuration (C) obstruct, there is less gap with running shaft (5) in lip seal (3), the lubricating oil mixing air of minute quantity continues to external diffusion, spiral seal structure (D) is introduced into contact type sealing structure (C) by the outer air of mechanical hull (1) and locates, produce positive pressure and stop the diffusion of lubricating oil mixing air, through cooled a small amount of lubricant oil, via the spill port of mechanical hull (1) bottom, discharge; Lubricant oil via each seal structures is finally forced to after oil return sealing configuration (A) is collected discharge mechanical hull (1).