Low-friction cylinder body structure

Abstract

The utility model discloses a low-friction cylinder body structure which comprises a cylinder body, the cylinder body comprises a containing cavity part arranged in the middle of the cylinder body and bearing supporting parts arranged at the two ends of the containing cavity part, and a self-lubricating wear-resisting layer sprayed with Teflon is arranged on the inner side wall of the containing cavity part. The inner side of each bearing supporting part is inwards provided with an annular installation base used for installing a rolling bearing, the depth of each annular installation base is smaller than the radial thickness of the rolling bearing, a specially-designed cylinder body structure is adopted, and the bearing supporting parts are arranged on the two sides of the cylinder body. The inner side of the bearing supporting part is inwards provided with an annular mounting seat for mounting a rolling bearing, the depth of the annular mounting seat is smaller than the radial thickness of the rolling bearing, and the rolling bearing and the blades are matched, so that a gap is formed between the blades and the inner side wall of the containing cavity part, and the cylinder body has the characteristic of low friction force.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a low-friction cylinder structure. Background Art

[0002] A positive displacement fan is a fan that generates airflow by changing volume. It usually consists of one or more chambers with changing volume and a drive mechanism. When the volume of the chamber changes, airflow is generated. Positive displacement fans can be divided into different types according to the shape of the chamber and the way the volume changes. One type is the vane fan.

[0003] The rotor of the sliding vane fan is a segregated rotor, and the rotor is usually inlaid with sliding blades. Under the action of the spring on the rotor, the blades abut against the inner wall of the cylinder. At this time, the rotor and the sliding vanes embedded in the rotor form spaces of unequal volumes with the inner wall of the cylinder. During the operation of the sliding vane fan, the sliding vanes move along the inner wall of the cylinder to suck in, compress and discharge air. In this process, since the blades are in direct contact with the cylinder, the friction surface is large, which easily generates high temperature and abnormal noise. The blades and the cylinder are also prone to wear and have a short service life, and need to be optimized and improved.

[0004] In view of the above problems, some improvements have been proposed in the prior art. For example, a Chinese patent with announcement number CN 220227177 U discloses a new type of positive displacement fan, including: a cylinder body, a bearing, a rotor, a blade, a sliding pin and a spring; the interior of the cylinder body is hollow to form an air chamber, the cylinder body is provided with an air inlet and an air outlet, both of which are connected to the air chamber, the bearing is fixed in the air chamber, the rotor is eccentrically arranged in the bearing, and the rotor is provided with a plurality of groups of mounting grooves arranged relatively along the radial direction of the rotor, each mounting groove is provided with a blade, a sliding pin and a spring, wherein the blade is located on the outside and the spring is located on the inside, one end of the sliding pin is connected to the spring, and the other end is abutted against the blade, and under the action of the spring, the sliding pin pushes the blade outward until it abuts against the inner ring of the bearing.

[0005] The above-mentioned prior art discloses a general overall structure of a positive displacement fan, but does not provide a detailed description of the specific structure of the cylinder body. Based on this, the present application proposes a practical solution. Utility Model Content

[0006] Purpose of the utility model: In order to overcome the problems existing in the prior art, the utility model provides a low-friction cylinder structure to solve the problem that the prior art lacks a specific structure of a positive displacement fan cylinder.

[0007] In order to solve the above problems, the utility model adopts the following technical solutions:

[0008] A low-friction cylinder structure comprises a cylinder body, wherein the cylinder body comprises a cavity portion arranged in the middle of the cylinder body, and bearing support portions arranged at both ends of the cavity portion, wherein the inner side wall of the cavity portion is provided with a self-lubricating and wear-resistant layer sprayed with Teflon, and an annular mounting seat for mounting a rolling bearing is provided inwardly on the inner side of the bearing support portion, wherein the depth of the annular mounting seat is less than the thickness of the rolling bearing in its radial direction.

[0009] Preferably, the outer side wall of the cavity portion is provided with heat dissipation ribs.

[0010] Preferably, the heat dissipation ribs are annular structures, and three of them are equidistantly arranged in the axial direction of the cavity.

[0011] Preferably, the side of the annular mounting seat close to the outer end surface of the cylinder body and the end close to the inner side surface of the cylinder body are both open.

[0012] Preferably, at least one end of the inner ring of the rolling bearing is recessed toward the middle of the axial direction of the ball bearing compared to the outer ring.

[0013] Preferably, the support portion is provided with a connecting portion extending toward the outer end of the cylinder body, and the connecting portion is provided with a threaded groove.

[0014] Beneficial effects: Compared with the prior art, the utility model has the following advantages:

[0015] 1. A specially designed cylinder structure is adopted, bearing support parts are arranged on both sides of the cylinder, and an annular mounting seat for mounting rolling bearings is opened inwardly on the inner side of the bearing support parts. The depth of the annular mounting seat is less than the thickness of the rolling bearing in its radial direction. The rolling bearing and the blades are matched to form a gap between the blades and the inner wall of the cavity, which can effectively avoid the wear of the rotating blades and the wear inside the cylinder.

[0016] 2. A self-lubricating wear-resistant layer is designed on the inner side of the cavity, so that when the blades rotate at high speed, the friction from the inner groove wall of the rotor will produce smaller friction particles. Driven by the high-speed rotating rotor, the tiny particles hit the inner wall of the cylinder body with self-lubricating properties. Due to the self-lubricating properties of the inner wall of the cylinder body, the particles fall off quickly without accumulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a sliding vane fan in the prior art;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 It is a three-dimensional diagram of the utility model;

[0020] Figure 4 This is a working principle diagram of the utility model;

[0021] Among them: 1. cylinder body; 11. connecting part; 2. cavity part; 21. self-lubricating wear-resistant layer; 3. bearing support part; 31. annular mounting seat; 4. heat dissipation ribs; 5. rolling bearing; 51. inner ring; 52. outer ring. DETAILED DESCRIPTION

[0022] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0023] Any feature disclosed in this specification (including any additional claims, abstracts and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.

[0024] like Figure 2-3 As shown, a low-friction cylinder structure comprises a cylinder 1, wherein the cylinder 1 comprises a cavity portion 2 arranged in the middle of the cylinder, and bearing support portions 3 arranged at both ends of the cavity portion 2, wherein the inner wall of the cavity portion 2 is provided with a self-lubricating and wear-resistant layer 21 sprayed with Teflon, and an annular mounting seat 31 for mounting a rolling bearing is provided inwardly on the inner side of the bearing support portion 3, wherein the depth of the annular mounting seat 31 is less than the thickness of the rolling bearing 5 in its radial direction.

[0025] A specially designed cylinder structure is adopted, bearing support parts are arranged on both sides of the cylinder body 1, and an annular mounting seat 31 for mounting the rolling bearing 5 is opened inwardly on the inner side of the bearing support part. The depth of the annular mounting seat 31 is less than the thickness of the rolling bearing in its radial direction. The rolling bearing and the blades are matched to form a gap between the blades and the inner wall of the cavity, which can effectively avoid the wear of the rotating blades and the wear inside the cylinder body.

[0026] A self-lubricating wear-resistant layer is designed on the inner side of the cavity so that when the blades rotate at high speed, the friction caused by the wall of the inner groove of the rotor will produce smaller friction particles. Driven by the high-speed rotating rotor, the tiny particles hit the inner wall of the cylinder body with self-lubricating properties. Due to the self-lubricating properties of the inner wall of the cylinder body, the particles fall off quickly without accumulation.

[0027] In this embodiment, the outer wall of the cavity portion 2 is provided with heat dissipation ribs 4, which can achieve a certain heat dissipation function while strengthening the strength of the structure.

[0028] In this embodiment, the heat dissipation ribs 4 are annular structures, and three of them are equidistantly arranged in the axial direction of the cavity portion 2 .

[0029] In this embodiment, the side of the annular mounting seat 11 close to the outer end surface of the cylinder body 1 and the end close to the inner side surface of the cylinder body 1 are both open, which is convenient for installing the rolling bearing 5.

[0030] In this embodiment, at least one end of the inner ring 51 of the rolling bearing 5 is recessed toward the middle of the axial direction of the ball bearing compared to the outer ring 52 .

[0031] In this embodiment, the support portion is provided with a connecting portion 11 extending toward the outer end of the cylinder body 1 , and the connecting portion is provided with a threaded groove for fitting with the end cover for installation and fixing.

[0032] The low friction cylinder structure of the present invention is tested for performance, and the results show that it has a lower friction coefficient, higher operating efficiency and service life. Compared with the traditional vane blower cylinder, the low friction cylinder structure proposed by the utility model has significantly improved performance.

[0033] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the utility model, and to fully describe the technical solution, purpose and effect of the utility model. Its purpose is to make the public understand the disclosed content of the utility model more thoroughly and comprehensively, and it does not limit the protection scope of the utility model.

[0034] The above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A low friction cylinder structure, characterized in that: The invention comprises a cylinder body (1), wherein the cylinder body (1) comprises a cavity portion (2) arranged in the middle of the cylinder body, and bearing support portions (3) arranged at both ends of the cavity portion (2); the inner side wall of the cavity portion (2) is provided with a self-lubricating wear-resistant layer (21) sprayed with Teflon; an annular mounting seat (31) for mounting a rolling bearing is provided inwardly on the inner side of the bearing support portion (3); the depth of the annular mounting seat (31) is less than the thickness of the rolling bearing (5) in its radial direction.

2. A low friction cylinder structure according to claim 1, characterized in that: The outer side wall of the cavity portion (2) is provided with heat dissipation ribs (4).

3. A low friction cylinder structure according to claim 2, characterized in that: The heat dissipation ribs (4) are annular structures, and three of them are equidistantly arranged in the axial direction of the cavity portion (2).

4. A low friction cylinder structure according to claim 1, characterized in that: The side of the annular mounting seat (31) close to the outer end surface of the cylinder body (1) and the end close to the inner side surface of the cylinder body (1) are both open.

5. A low friction cylinder structure according to claim 4, characterized in that: At least one end of the inner ring (51) of the rolling bearing (5) is recessed toward the middle of the axial direction of the ball bearing compared to the outer ring (52).

6. A low friction cylinder structure according to claim 1, characterized in that: The bearing support portion is provided with a connecting portion (11) extending toward the outer end of the cylinder body (1), and the connecting portion is provided with a thread groove.

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