CN220015843U

CN220015843U - Sand mill bearing protection device

Info

Publication number: CN220015843U
Application number: CN202321355414.7U
Authority: CN
Inventors: 翟晓光; 莫铭伟; 陆小虎
Original assignee: Changzhou Longxin Intelligent Equipment Co ltd
Current assignee: Changzhou Longxin Intelligent Equipment Co ltd
Priority date: 2023-05-31
Filing date: 2023-05-31
Publication date: 2023-11-14
Anticipated expiration: 2033-05-31

Abstract

The utility model relates to a sand mill bearing protection device, which comprises: a frame; the main shaft is rotationally connected with the frame; the cylinder body is fixedly connected with the rack; the rotor is arranged in the cylinder body and is fixedly connected with the main shaft; a bearing is arranged between the main shaft and the frame, and a shaft sleeve for installing the bearing is arranged between the main shaft and the frame; a mechanical seal is arranged between the cylinder body and the rotor; the bushing is sleeved on the rotor, and labyrinth seal is arranged between the bushing and the shaft sleeve; wherein the mechanical seal is located on one side of the labyrinth seal; a labyrinth seal is arranged between the rotor and the bushing, a mechanical seal is arranged between the cylinder body and the rotor, when the mechanical seal fails, high-pressure sealing liquid flows leftwards and enters the labyrinth seal, and the labyrinth seal prevents the sealing liquid from continuing to move leftwards and entering the bearing chamber, so that materials and sealing liquid are prevented from entering the bearing chamber.

Description

Sand mill bearing protection device

Technical Field

The utility model relates to a sand mill, in particular to a bearing protection device of the sand mill.

Background

As shown in fig. 1-2, the sand mill rotating part is composed; the sand mill rotating part mainly comprises a bearing, a mechanical seal and a rotor, wherein the mechanical seal is distributed between the rotor and the cylinder; positive pressure sealing liquid is arranged in a cavity of the mechanical seal, and the mechanical seal plays a role in sealing with the cylinder body when the rotor rotates; the mechanical seal is in failure or even the ring is cracked due to some reasons in the use process of the mechanical seal, and the inside of the mechanical seal and the grinding cavity are filled with positive pressure liquid; if the mechanical seal ring breaks once cracked; positive pressure liquid and material will tilt towards the bearing side, causing sealing liquid and material to enter the bearing, thereby damaging the bearing.

In summary, how to avoid materials and sealing fluid entering the bearing is an urgent problem to be solved by researchers in the field.

Disclosure of Invention

The utility model aims to solve the technical problems that: how to prevent materials and sealing liquid from entering the bearing;

in order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model relates to a sand mill bearing protection device, which comprises: a frame; the main shaft is rotationally connected with the frame; the cylinder body is fixedly connected with the rack; the rotor is arranged in the cylinder body and is fixedly connected with the main shaft; a bearing is arranged between the main shaft and the frame, and a shaft sleeve for installing the bearing is arranged between the main shaft and the frame; a mechanical seal is arranged between the cylinder body and the rotor; the bushing is sleeved on the rotor, and labyrinth seal is arranged between the bushing and the shaft sleeve; wherein the mechanical seal is located on one side of the labyrinth seal;

the shaft sleeve is matched with the bearing seat for installing the bearing, the bushing is fixedly connected with the rotor, the labyrinth seal is arranged between the rotor and the bushing, the mechanical seal is arranged between the cylinder body and the rotor, after the mechanical seal fails, high-pressure sealing liquid flows leftwards and enters the labyrinth seal, and the labyrinth seal prevents the sealing liquid from continuing to move leftwards and entering the bearing chamber, so that materials and sealing liquid are prevented from entering the bearing chamber.

To illustrate the specific structure of the labyrinth seal, the present utility model employs a labyrinth seal comprising: the annular bulge is arranged on the end face of the shaft sleeve; the annular groove is formed in the end face of the bushing, is matched with the annular protrusion and forms a gap; the pressure relief hole is formed in the shaft sleeve and is communicated with the outside;

in this scheme, annular bulge inserts in the annular groove, forms labyrinth seal, and sealing fluid need be through tortuous clearance just can get into the bearing chamber, and consequently the sealing fluid of high pressure can be directly followed and discharged through the pressure release hole, avoids sealing fluid impact bearing chamber.

In order to further prevent the sealing liquid from entering the bearing chamber, the utility model also comprises: the framework is arranged at the step of the inner ring of the shaft sleeve and is used for connecting the shaft sleeve and the bushing in a sealing way;

the shaft sleeve and the bushing are in sealing connection through the framework, and sealing liquid entering the bearing chamber through the gap is blocked by the framework, so that materials and sealing liquid are prevented from entering the bearing.

In order to illustrate the specific structure of the framework, the utility model adopts the framework to comprise: an annular lip is arranged on the inner wall of the outer ring in an extending way towards the center; the hoop is sleeved at the lip and hoops the main shaft;

the outer ring plays a supporting role, the lip is propped against the outer wall of the main shaft, the hoop is sleeved at the lip, and the lip is propped against the outer wall of the main shaft for sealing.

The utility model has the beneficial effects that: the utility model relates to a bearing protection device of a sand mill, wherein a labyrinth seal is arranged between a rotor and a bushing, a mechanical seal is arranged between a cylinder body and the rotor, when the mechanical seal fails, high-pressure sealing liquid flows leftwards into the labyrinth seal, and the labyrinth seal prevents the sealing liquid from continuously moving leftwards into a bearing chamber, so that materials and the sealing liquid are prevented from entering the bearing chamber.

Drawings

The utility model will be further described with reference to the drawings and examples.

FIG. 1 is a schematic view of a conventional sand mill;

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

FIG. 3 is a schematic diagram of the structure of the present utility model;

FIG. 4 is a schematic view of the structure at FIG. 3B;

FIG. 5 is a schematic structural view of a skeleton;

in the figure: 1-frame, 2-main shaft, 3-barrel, 4-rotor, 5-bearing, 6-axle sleeve, 7-mechanical seal, 8-bush, 9-annular bulge, 10-annular groove, 11-relief hole, 12-skeleton, 13-outer lane, 14-lip.

Description of the embodiments

The utility model will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the utility model and therefore show only the structures which are relevant to the utility model.

As shown in fig. 3-4, the present utility model is a sand mill bearing protection device comprising: a frame 1; a main shaft 2 rotatably connected with the frame 1; a cylinder 3 fixedly connected with the frame 1; the rotor 4 is arranged in the cylinder 3 and is fixedly connected with the main shaft 2; a bearing 5 and a shaft sleeve 6 for installing the bearing 5 are arranged between the main shaft 2 and the frame 1; a mechanical seal 7 is arranged between the cylinder 3 and the rotor 4; a bushing 8, which is sleeved on the rotor 4, and a labyrinth seal is arranged between the bushing and the shaft sleeve 6; wherein the mechanical seal 7 is positioned at one side of the labyrinth seal;

As shown in fig. 3 to 4, in order to illustrate a specific structure of the labyrinth seal, the present utility model employs the labyrinth seal including: an annular projection 9 provided on an end face of the sleeve 6; the annular groove 10 is formed on the end surface of the bushing 8, is matched with the annular bulge 9 and forms a gap; the pressure relief hole 11 is formed at the shaft sleeve 6 and is communicated with the outside;

As shown in fig. 3-4, to further prevent the sealing fluid from entering the bearing chamber, the present utility model employs a method further comprising: the framework 12 is arranged at the step of the inner ring of the shaft sleeve 6 and is used for sealing and connecting the shaft sleeve 6 and the bushing 8;

As shown in fig. 5, to illustrate a specific structure of the skeleton, the present utility model employs a skeleton 12 including: an outer ring 13, the inner wall of which extends towards the center and is provided with an annular lip 14; the hoop 15 is sleeved at the lip 14 and hoops the main shaft 2;

With the above-described preferred embodiments according to the present utility model as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present utility model. The technical scope of the present utility model is not limited to the description, but must be determined according to the scope of claims.

Claims

1. A sand mill bearing protection device, comprising:

a frame;

the main shaft is rotationally connected with the frame;

the cylinder body is fixedly connected with the rack;

the rotor is arranged in the cylinder body and is fixedly connected with the main shaft;

a bearing is arranged between the main shaft and the frame, and a shaft sleeve for installing the bearing is arranged between the main shaft and the frame;

a mechanical seal is arranged between the cylinder body and the rotor;

the bushing is sleeved on the rotor, and labyrinth seal is arranged between the bushing and the shaft sleeve;

wherein the mechanical seal is located on one side of the labyrinth seal.

2. A sand mill bearing protection device according to claim 1, wherein the labyrinth seal comprises:

the annular bulge is arranged on the end face of the shaft sleeve;

the annular groove is formed in the end face of the bushing, is matched with the annular protrusion and forms a gap;

the pressure relief hole is formed in the shaft sleeve and is communicated with the outside.

3. A sand mill bearing protection device as claimed in claim 1, further comprising:

the framework is arranged at the step of the inner ring of the shaft sleeve and is used for sealing and connecting the shaft sleeve and the bushing.

4. A sand mill bearing protection device according to claim 3, wherein the skeleton comprises:

an annular lip is arranged on the inner wall of the outer ring in an extending way towards the center;

and the hoop is sleeved at the lip and hoops the main shaft.