CN214196997U

CN214196997U - A self-balancing mechanical labyrinth seal type thin oil lubricated bearing box

Info

Publication number: CN214196997U
Application number: CN202022596896.8U
Authority: CN
Inventors: 秦伯进; 王喜明; 王婷婷; 陈华
Original assignee: Jiangsu Josun Air Conditioner Co Ltd
Current assignee: Jiangsu Josun Air Conditioner Co Ltd
Priority date: 2020-11-11
Filing date: 2020-11-11
Publication date: 2021-09-14
Anticipated expiration: 2030-11-11

Abstract

The utility model relates to a self-balancing mechanical labyrinth seal type thin oil lubricating bearing box, which comprises a box body, a main shaft and a transmission part. , the ventilation pipe is screwed to the trachea cap, the screw thread of the ventilation pipe cap is above the ventilation hole, and there is a gap between the lower cap wall of the ventilation pipe cap and the outer wall of the ventilation pipe at the position of the ventilation hole; the inner wall of the transparent cover is set as a labyrinth Mechanical seal, an oil seal cavity is set on the outer end face of the transparent cover. The oil seal cavity has a built-in oil seal sleeved on the main shaft and is locked by the oil seal gland through bolts. There is also an oil return groove on the inner wall of the transparent cover, and a corresponding oil return groove is opened on the lower part of the transparent cover. The oil return through hole, the oil baffle ring is sleeved on the main shaft on the inner side of the transparent cover. The structure is simple, can effectively take into account the internal and external pressure and sealing performance of the box, and prevent the leakage of lubricating oil.

Description

Self-balancing mechanical labyrinth sealed type thin oil lubrication bearing box

Technical Field

The utility model relates to a bearing box, a self-balancing machinery labyrinth sealed thin oil lubrication bearing box specifically says so.

Background

At present, most of centrifugal ventilators produced at home and abroad adopt rolling bearings to support thin oil lubrication structures, oil leakage phenomena are generated due to poor sealing of bearing boxes of a plurality of fans, inconvenience is brought to users, unnecessary waste is caused, surrounding environments are polluted, and the bearings can be burnt out due to poor lubrication in severe cases. In order to solve the problem of oil leakage of the bearing box, a reliable sealing structure of the bearing box must be adopted fundamentally.

Disclosure of Invention

The utility model provides a simple structure can effectively compromise internal and external pressure and sealing performance of box, prevents the self-balancing machinery labyrinth sealed thin oil lubrication bearing case that lubricating oil leaked.

The utility model adopts the technical proposal that: the utility model provides a self-balancing machinery labyrinth sealed thin oil lubrication bearing box, includes box, main shaft and drive disk assembly, and the main shaft is through covering horizontal cross-under in the box, its characterized in that: the upper part of the box body is vertically outwards connected with a vent pipe communicated with the inner cavity of the box body in a penetrating way, the vent pipe is provided with a radial vent hole, the upper part of the vent pipe is screwed with a vent pipe cap through threads, the thread screwing section of the vent pipe cap is arranged above the vent hole, and a gap is reserved between the lower part of the vent pipe cap and the outer wall of the vent pipe at the position of the vent hole; the inner wall of the transparent cover is set to be a labyrinth mechanical seal, the outer end face of the transparent cover is provided with an oil seal cavity, an oil seal sleeved on the main shaft is arranged in the oil seal cavity and locked by an oil seal gland cross-connecting bolt, an oil return groove is further formed in the inner wall of the transparent cover, an oil return through hole is formed in the lower portion of the transparent cover corresponding to the oil return groove, and an oil retainer ring is sleeved on the main shaft on the inner side of the transparent cover.

The annular body of the oil scraper ring is connected with a tapered wedge structure with an inclined surface facing to the outside, and the inner circumference clearance of the tapered wedge structure is sleeved on the outer circumference of the labyrinth mechanical seal arranged in the box body.

The outer periphery of the annular body of the oil scraper ring is of a sharp-angle-shaped structure with an inclined surface facing inwards, the sharp-angle-shaped structure is connected with an inclined wedge structure with an inclined surface facing outwards, and the inner peripheral gap of the inclined wedge structure is sleeved on the outer periphery of the labyrinth mechanical seal arranged in the box body.

The oil return groove is arranged between any two of the plurality of parallel sealing grooves on the inner side wall of the labyrinth mechanical seal.

When the fan runs at high speed, the temperature rises, so that the pressure in the box is greater than the pressure outside the box. The force of the lubricating oil in the bearing box comes from factors such as lubricating oil splashing, oil level height, shapes of parts, temperature rise of the lubricating oil and the like generated after the main shaft rotates to drive the rolling bearing soaked in the lubricating oil, and the lubricating oil leaks out of the bearing box along the main shaft under the action of an external pushing force. The utility model discloses an air vent of breather pipe can balance box internal and external pressure balance, has an exogenic action on lubricating oil, and the outer thrust of balanced former bearing box effectively ensures not have the oil leak. The labyrinth mechanical sealing structure is arranged at the transparent cover, and can play a better sealing role by matching with the oil retainer ring at the inner side and the oil seal at the outer side, and the lubricating oil in the labyrinth mechanical sealing structure is discharged and recycled or returned for reuse by the oil return groove through the oil return through hole, so that a better leakage-proof effect is achieved.

Drawings

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

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of FIG. 1 at B;

fig. 4 is a schematic view of the transparent cover structure of the present invention.

In the figure: the oil seal device comprises a box body 1, a main shaft 2, a vent pipe 3, a vent hole 4, a vent pipe cap 5, a transparent cover 6, a labyrinth type mechanical seal 7, an oil seal cavity 8, an oil seal 9, an oil seal gland 10, an oil return groove 11, an oil return through hole 12 and an oil baffle ring 13.

Detailed Description

The following is further described with reference to the accompanying drawings.

FIGS. 1-4 show: a self-balancing mechanical labyrinth sealed thin oil lubrication bearing box comprises a box body 1, a main shaft 2 and a transmission part, wherein the main shaft 2 is horizontally connected in the box body 1 in a penetrating way through a transparent cover 6, the upper part of the box body 1 is vertically and outwards connected with a vent pipe 3 communicated with an inner cavity of the box body in a penetrating way, a radial vent hole 4 is arranged on the vent pipe, the upper part of the vent pipe is screwed with a vent pipe cap 5 through threads, the thread screwing section of the vent pipe cap is arranged above the vent hole, and a gap is reserved between the lower cap wall of the vent pipe cap and the outer wall of the vent pipe at the position of the vent hole; the inner wall of the transparent cover 6 is provided with a labyrinth mechanical seal 7, the outer end face of the transparent cover is provided with an oil seal cavity 8, an oil seal 9 which is sleeved on the main shaft is arranged in the oil seal cavity and is locked by a bolt which is penetrated and connected through an oil seal gland 10, the inner wall of the transparent cover is also provided with an oil return groove 11 which is arranged between any two of a plurality of parallel seal grooves on the inner side wall of the labyrinth mechanical seal,

an oil return through hole 12 is arranged on the lower part of the transparent cover corresponding to the oil return groove, and an oil retainer ring 13 is sleeved on the main shaft on the inner side of the transparent cover.

In this embodiment, the annular body of the oil control ring is connected to an inclined wedge structure with an inclined surface facing outward, and an inner circumferential gap of the inclined wedge structure is sleeved on an outer circumference of the labyrinth mechanical seal disposed in the case. The annular body periphery of the oil scraper ring is of a sharp-angle-shaped structure with an inclined surface facing inwards, the sharp-angle-shaped structure is connected with an inclined wedge structure with an inclined surface facing outwards, and the inner peripheral gap of the inclined wedge structure is sleeved on the outer periphery of the labyrinth mechanical seal arranged in the box body. Due to the structural design of the oil deflector ring, lubricating oil can be well thrown back, the oil inlet amount of the labyrinth mechanical seal facing the transparent cover is reduced, and the sealing effect is improved.

Claims

1. A self-balancing mechanical labyrinth seal type thin oil lubricating bearing box, comprising a box body, a main shaft and a transmission part, and the main shaft is horizontally penetrated in the box body through a transparent cover, it is characterized in that: the upper part of the box body is penetrated vertically outwards. Connect a ventilation pipe that communicates with the inner cavity of the box. The ventilation pipe is provided with radial ventilation holes. The upper part of the ventilation pipe is screwed into the ventilation pipe cap. The screwed section of the ventilation pipe cap is above the ventilation hole and the lower cap of the ventilation pipe cap There is a gap between the wall and the outer wall of the ventilation pipe at the position of the ventilation hole; the inner wall of the transparent cover is set as a labyrinth mechanical seal, and the outer end face of the transparent cover is provided with an oil seal cavity. The inner wall of the transparent cover is also provided with an oil return groove, the lower part of the transparent cover is provided with an oil return through hole corresponding to the oil return groove, and the main shaft inside the transparent cover is sleeved with an oil retaining ring.

2. A self-balancing mechanical labyrinth seal type thin oil lubricated bearing housing according to claim 1, characterized in that: the annular body of the oil slinger is connected to the outside, and the inclined wedge structure with the inclined surface facing the outside is inclined. The inner peripheral gap of the wedge structure is sleeved on the outer periphery of the labyrinth mechanical seal placed in the box.

3. A self-balancing mechanical labyrinth seal type thin oil lubricated bearing housing according to claim 2, characterized in that: the outer circumference of the annular body of the oil slinger is a sharp-angled structure with an inclined surface facing inward, and the sharp-angled The structure is connected to the outside to form an oblique wedge structure with an inclined surface facing the outside, and the inner peripheral gap of the oblique wedge structure is sleeved on the outer circumference of the labyrinth mechanical seal placed in the box.

4. A self-balancing mechanical labyrinth seal type thin oil lubricated bearing housing according to claim 1, wherein the oil return groove is placed in any two of the multiple parallel sealing grooves on the inner side wall of the labyrinth mechanical seal between.