Blade synchronous supporting bearing of sliding vane type air blower

Abstract

The blade synchronous supporting bearing comprises an annular bearing seat and a rolling bearing, annular installation seats are inwards arranged at the two ends of the inner side face of the bearing seat, and the two sides, close to the inner side face and the outer end face of the bearing seat, of the annular installation seats are open. The bearing inner ring is used for supporting the blades and is in coupling connection with the blades, the bearing outer ring is fixedly arranged in the bearing seat, the rolling body is arranged between the bearing inner ring and the bearing outer ring, and compared with at least one end of the bearing outer ring, the bearing inner ring is closer to the axial middle of the rolling bearing. The specially designed bearing inner ring is adopted, at least one end of the bearing inner ring sinks inwards relative to the bearing outer ring, the bearing inner ring does not make contact with the left end cover and the right end cover, the inner side of the bearing inner ring makes close contact with the blades, the overall structure is simple, and installation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, and particularly relates to a blade synchronous support bearing of a sliding vane blower. Background Technique

[0002] A positive displacement fan is a type of fan that generates air flow through volume changes. It usually consists of one or more cavities with volume changes and a driving mechanism. When the cavity volume changes, air flow is generated. Positive displacement fans can be divided into different types according to the shape of the cavity and the way of volume change, and one of them is a sliding vane fan.

[0003] The rotor of the sliding vane fan is a segregated rotor, and sliding vanes are usually embedded on the rotor. Under the action of springs on the rotor, the vanes are in contact with the inner wall of the cylinder block. At this time, the rotor, the sliding vanes embedded in the rotor, and the inner wall of the cylinder block form spaces with unequal volumes. During the operation of the sliding vane fan, the sliding vanes move along the inner wall of the cylinder block, sucking in, compressing, and discharging air. In this process, since the vanes are in direct contact with the cylinder block, the friction surface is large, which easily generates high temperature and abnormal noise. The vanes and the cylinder block are also easily worn, with 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, the Chinese patent with the patent number CN 220227177 U discloses a new type of positive displacement fan, including: a cylinder block, a bearing, a rotor, vanes, sliding pins, and springs; the inside of the cylinder block is hollow to form an air chamber, and the cylinder block is provided with an air inlet and an air outlet, both of which are communicated with the air chamber. The bearing is fixedly arranged in the air chamber, the rotor is eccentrically arranged in the bearing, and the rotor is provided with multiple groups of installation grooves arranged oppositely along the radial direction of the rotor. Each installation groove is provided with a vane, a sliding pin, and a spring. Among them, the vane is located on the outside, the spring is located on the inside, one end of the sliding pin is connected to the spring, and the other end is in contact with the vane. Under the action of the spring, the sliding pin pushes the vane outward to be in contact with the inner ring of the bearing.

[0005] The above prior art discloses a general overall structure of a positive displacement fan, but does not elaborate on the specific structure of the support bearing. Based on this, the present application proposes a practical solution. Content of the Utility Model

[0006] Purpose of the utility model: In order to overcome the problems existing in the prior art, the utility model provides a blade synchronous support bearing of a sliding vane blower to solve the problem of the lack of specific structure of the support bearing of the positive displacement fan in the prior art.

[0007] To solve the above problems, the utility model adopts the following technical solutions:

[0008] A blade synchronous support bearing for a sliding vane blower, comprising an annular bearing seat and a rolling bearing. At both ends of the inner side of the bearing seat, annular mounting seats are recessed inward. Both sides of the annular mounting seat close to the inner side and the outer end face of the bearing seat are open. The rolling bearing includes an inner bearing ring for supporting the blade and connected to the blade through a coupling structure, an outer bearing ring fixedly arranged in the bearing seat, and rolling elements arranged between the inner bearing ring and the outer bearing ring. At least one end of the inner bearing ring is closer to the middle of the axial direction of the rolling bearing than the outer bearing ring.

[0009] Preferably, the width of the outer bearing ring in its axial direction is equal to the width of the annular mounting seat.

[0010] Preferably, both ends of the rolling bearing in the middle of its axial direction are symmetric structures.

[0011] Preferably, the thickness of the rolling bearing in its radial direction is greater than the depth of the annular mounting seat.

[0012] Preferably, a groove for coupling connection with the blade coupling boss is arranged on the inner side of the inner bearing ring.

[0013] Preferably, a boss for coupling connection with the blade coupling groove is arranged on the inner side of the inner bearing ring.

[0014] Preferably, four coupling structures are equidistantly arranged along the inner circumferential direction of the inner bearing ring.

[0015] Preferably, the rolling bearing is a radial bearing.

[0016] Beneficial effects: Compared with the prior art, the present utility model has the following advantages:

[0017] 1. By adopting a specially designed inner bearing ring, at least one end of the inner bearing ring is recessed inward compared with the outer bearing ring. When installing the rolling bearing, the recessed end of the inner bearing ring is installed on the side close to the end cover, and the end cover presses the outer bearing ring against and fixes it in the annular mounting seat. However, at this time, the inner bearing ring does not contact the left and right end covers, and the inner side of the inner ring is in close contact with the blade. The overall structure is simple and the installation is convenient.

[0018] 2. The inner bearing ring is provided with a coupling structure, which can be coupled and connected with the blade. In cooperation with the blower structure in the prior art, the external force structure generated by the spring acts on the inner bearing ring through the blade, enabling the blade and the inner bearing ring to rotate synchronously, improving the service life of the blade bearing connection structure and extending the service life. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of a prior art sliding vane blower;

[0020] Figure 2 It is a sectional view of the present utility model;

[0021] Figure 3 It is a sectional view in another direction of the present utility model;

[0022] Figure 4 It is a partially enlarged view of the present utility model;

[0023] Figure 5 It is a working principle diagram of the present utility model;

[0024] Figure 6 It is a sectional view of another embodiment of the present utility model;

[0025] Wherein: 1. Bearing seat; 11. Annular mounting seat; 2. Rolling bearing; 21. Bearing inner ring; 211. Groove; 212. Boss; 22. Bearing outer ring; 23. Rolling element; 3. Blade. Specific embodiments

[0026] All features disclosed in this specification, or steps in all methods or processes disclosed, except for mutually exclusive features and / or steps, can be combined in any manner.

[0027] Any feature disclosed in this specification, including any additional claims, abstract, and drawings, unless specifically stated otherwise, can be replaced by other equivalent or similar-purpose alternative features. That is, unless specifically stated otherwise, each feature is only an example of a series of equivalent or similar features.

[0028] As Figure 2-5 shown, a blade synchronous support bearing of a sliding vane blower includes an annular bearing seat 1 and a rolling bearing 2. At both ends of the inner side of the bearing seat 1, annular mounting seats 11 are recessed inward. Both sides of the annular mounting seat 11 close to the inner side and the outer end face of the bearing seat 1 are open. The rolling bearing 2 includes a bearing inner ring 21 for supporting the blade 3 and connected to the blade through a coupling structure, a bearing outer ring 22 fixedly arranged in the bearing seat 1, and rolling elements 23 arranged between the bearing inner ring 21 and the bearing outer ring 22. At least one end of the bearing inner ring is closer to the middle of the axial direction of the rolling bearing than the bearing outer ring.

[0029] By adopting a specially designed bearing inner ring, at least one end of the bearing inner ring is recessed inward compared with the bearing outer ring. When installing the rolling bearing, the recessed end of the bearing inner ring is installed on the side close to the end cover. The end cover presses the bearing outer ring against and fixes it in the annular mounting seat. However, at this time, the bearing inner ring does not contact the left and right end covers, and the inner side of the inner ring is in close contact with the blade. The overall structure is simple and the installation is convenient.

[0030] A bearing inner ring with a special design is adopted. At least one end of the bearing inner ring is recessed inward compared to the bearing outer ring, so that when installing the rolling bearing, the recessed end of the bearing inner ring is installed on the side close to the end cover. The end cover presses the bearing outer ring against and fixes it in the annular mounting seat. However, at this time, the bearing inner ring does not contact the left and right end covers, and the inner side of the inner ring is in close contact with the blade. The overall structure is simple and the installation is convenient.

[0031] In this embodiment, the width of the bearing outer ring 22 in its axial direction is equal to the width of the annular mounting seat 11. With this structure, when installing the rolling bearing, the end cover can be installed with a flat structure on the fan cylinder block to complete the fixed installation of the rolling bearing, and it will not affect the operation of the bearing inner ring 21 and the blade.

[0032] In this embodiment, both ends in the middle of the rolling bearing 2 in its axial direction are symmetric structures, that is, both ends of the bearing inner ring are recessed inward compared to the bearing outer ring. Using a rolling bearing with a symmetric structure is not only simpler in manufacturing, but also has uniform stress on each side and a more stable overall structure.

[0033] In this embodiment, the thickness of the rolling bearing 2 in its radial direction is greater than the depth of the annular mounting seat 11. Since the blade needs to be coupled to the bearing inner ring to drive the bearing inner ring to rotate synchronously, with this structure, the blade can complete the cooperation with the bearing without using a special structure. The coupling end of the blade and the rolling bearing 2 only needs to adopt a straight structure at the coupling position to retain a certain space between the side wall of the cylinder block to prevent friction.

[0034] In this embodiment, a groove 211 coupled to the blade coupling groove is provided on the inner side of the bearing inner ring 21.

[0035] In another embodiment of the present utility model, as Figure 6 shown, a boss 212 coupled to the blade coupling boss is provided on the inner side of the bearing inner ring 21. It can be understood that other coupling connection methods with other structures can also be adopted between the bearing inner ring 21 and the blade.

[0036] In this embodiment, four coupling structures are equidistantly arranged along the inner circumferential direction of the bearing inner ring 21 for connecting four blades.

[0037] In this embodiment, the rolling bearing is a radial bearing. Since in this type of fan, the main function of the rolling bearing is to bear the radial load from the blade, a radial bearing can be adopted.

[0038] The purpose of the above embodiments is to exemplarily reproduce and deduce the technical solution of the present utility model, and to completely describe the technical solution, purpose and effect of the present utility model. The purpose is to enable the public to understand the disclosed content of the present utility model more thoroughly and comprehensively, and it does not limit the protection scope of the present utility model hereby.

[0039] The above embodiments are not exhaustive listings based on the present utility model. In addition, there may be multiple other embodiments not listed. Any substitution and improvement made on the basis of not violating the concept of the present utility model fall within the protection scope of the present utility model.

Claims

1. A blade synchronous support bearing for a sliding vane blower, characterized in that: The invention comprises an annular bearing seat (1) and a rolling bearing (2), wherein an annular mounting seat (11) is provided inwardly at both ends of the inner side surface of the bearing seat (1), and both sides of the annular mounting seat (11) close to the inner side surface and the outer end surface of the bearing seat (1) are both open. The rolling bearing (2) comprises an inner bearing ring (21) for supporting a blade (3) and connected to the blade via a coupling structure, an outer bearing ring (22) fixedly arranged in the bearing seat (1), and a rolling body (23) arranged between the inner bearing ring (21) and the outer bearing ring (22), wherein at least one end of the inner bearing ring (21) is closer to the middle of the axial direction of the rolling bearing (2) than the outer bearing ring (22).

2. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: The width of the bearing outer ring (22) in the axial direction is equal to the width of the annular mounting seat (11).

3. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: The rolling bearing (2) has symmetrical structures at both ends in the middle of its axial direction.

4. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: The thickness of the rolling bearing (2) in the radial direction is greater than the depth of the annular mounting seat (11).

5. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: A groove (211) coupled to the blade coupling boss is provided on the inner side of the bearing inner ring (21).

6. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: A boss (212) coupled to the blade coupling groove is provided on the inner side of the bearing inner ring (21).

7. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: Four coupling structures are arranged equidistantly along the inner circumference of the bearing inner ring (21).

8. The blade synchronous support bearing of a sliding vane blower according to claim 1, characterized in that: The rolling bearing is a radial bearing.

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