Retainer for high-speed bearing and high-speed bearing

Abstract

The utility model provides a retainer for a high-speed bearing, the retainer is an L-shaped retainer and is provided with a radial wall and a circumferential wall which are intersected with each other, and the outer circumferential surface of the radial wall is provided with one or more material removal parts. The utility model further provides a high-speed bearing which comprises a shaft, an outer ring, a rolling body and a retainer. The shaft and the outer ring respectively comprise a channel for accommodating the rolling body; the retainer is provided with an outer peripheral surface and an inner peripheral surface along the radial direction, and the retainer is characterized in that a gap between the outer peripheral surface and the inner surface of the outer ring is smaller than a gap between the inner peripheral surface and the outer surface of the shaft. The shape and position correction of the retainer is improved by changing the guide mode of the retainer; and the lubricating condition of the bearing is improved by transforming the structure of the retainer. According to the utility model, the problem that the rotating speed of the bearing cannot be further improved in the prior art is solved, and the bearing can still run stably at a high rotating speed of more than 150000rpm.

Description

Technical Field

[0001] The utility model provides a retainer for a high-speed bearing and a high-speed bearing. Background Art

[0002] Bearings are used in various fields, especially some bearings are used in high-speed mechanical equipment. For example, the bearings of some textile machines need to work at a high speed of about 100,000 rpm. This kind of bearing also has a special structure, which includes a shaft, an outer ring, and a rolling element, wherein the outer ring includes a groove for accommodating the rolling element, and a groove for accommodating the rolling element is machined on the shaft (therefore, the shaft is also equivalent to the inner ring of a conventional bearing), and the rolling element is arranged between the two grooves. Moreover, this type of bearing usually includes two rows of rolling elements arranged on the shaft, the two rows of rolling elements share an outer ring, and the shaft also includes a shoulder arranged between the two rows of rolling elements.

[0003] However, such bearings in the prior art can generally only operate at a speed of 100,000 rpm, and are difficult to operate smoothly at a higher speed, especially at a speed of 150,000 rpm, which seriously affects the production efficiency of related equipment. There are many reasons that affect the increase in bearing speed, and there is currently no solution to increase the bearing speed. Therefore, the art expects a bearing that can operate at a speed of more than 150,000 rpm. Utility Model Content

[0004] In response to the above-mentioned problems and needs, the present disclosure proposes a new technical solution, which solves the above-mentioned problems and brings other technical effects by adopting the following technical features.

[0005] The utility model provides a retaining frame for a high-speed bearing, the rotation speed of the high-speed bearing is above 150000rpm, the retaining frame is an L-shaped retaining frame, which has a radial wall and a circumferential wall intersecting each other, and is characterized in that the outer peripheral surface of the radial wall has one or more material removal parts.

[0006] The utility model also provides a high-speed bearing, the rotation speed of which is above 150,000 rpm, the high-speed bearing comprising a shaft, an outer ring, rolling elements and a retaining frame, the shaft and the outer ring respectively comprising grooves for accommodating the rolling elements; along the radial direction, the retaining frame has an outer circumferential surface and an inner circumferential surface, characterized in that a gap between the outer circumferential surface and the inner surface of the outer ring is smaller than a gap between the inner circumferential surface and the outer surface of the shaft.

[0007] By changing the guide mode of the cage, the shape and position correction of the cage are improved; by modifying the structure of the cage, the lubrication condition of the bearing is improved. The utility model overcomes the problem that the bearing speed cannot be further increased in the prior art, and realizes that the bearing can still run smoothly at a high speed of more than 150,000 rpm. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a schematic diagram of a high-speed bearing according to a preferred embodiment of the utility model;

[0009] Figure 2 for Figure 1 A magnified view of part A;

[0010] Figure 3 is a cross-sectional view of a retainer according to a preferred embodiment of the utility model;

[0011] Figure 4 for Figure 3 a side view of the cage shown;

[0012] Figure 5 for Figure 3 A perspective view of the cage shown;

[0013] Figure 6 is a cross-sectional view of a retainer according to another preferred embodiment of the utility model;

[0014] Figure 7 for Figure 6 a side view of the cage shown;

[0015] Figure 8 for Figure 6 A perspective view of the cage shown. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solution and advantages of the technical solution of the present disclosure clearer, the technical solution of the embodiment of the present disclosure will be clearly and completely described in conjunction with the drawings of the specific embodiments of the present disclosure. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present disclosure.

[0017] Compared to the embodiments shown in the drawings, feasible implementations within the scope of the present disclosure may have fewer components, other components not shown in the drawings, different components, differently arranged components, or differently connected components, etc. In addition, two or more components in the drawings may be implemented in a single component, or a single component shown in the drawings may be implemented as multiple separate components.

[0018] Unless otherwise defined, the technical terms or scientific terms used herein shall have the common meanings understood by those skilled in the art in the field to which the present disclosure belongs. The words "first", "second" and similar words used in the patent specification and claims of the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. When the number of components is not specified, the number of components may be one or more; similarly, words such as "one", "the", "said" and the like do not necessarily indicate a quantity limitation. Words such as "include" or "comprise" and the like mean that the element or object appearing before the word includes the element or object listed after the word and its equivalent, without excluding other elements or objects. Words such as "install", "set", "connect" or "connected" and the like are not limited to physical or mechanical installation, setting, connection, but may include electrical installation, setting, connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate the relative orientation relationship when the device is in use or the orientation relationship shown in the drawings. When the absolute position of the described object changes, the relative position relationship may also change accordingly.

[0019] For ease of description, the direction of the axis of rotation of the bearing is referred to as the axial direction, and the direction perpendicular to the axial direction is referred to as the radial direction. The term "inward / inward" refers to the direction toward the inside of the bearing, and conversely, the term "outward / outward" refers to the direction toward the outside of the bearing. Moreover, the bearing generally includes a plurality of rolling elements, and the corresponding retaining frame also has a plurality of pockets for retaining the rolling elements. Therefore, for the sake of convenience in the following description, even if it is not modified by "plurality", the rolling elements and pockets should be understood as multiple rather than single. In addition, in different embodiments, the same reference numerals are used to refer to components having the same or similar structures and functions.

[0020] In view of the above problems, the inventors have conducted a lot of research and found that one of the main reasons why the rotation speed of the bearing in the prior art cannot be further increased is that the cage is difficult to adapt to the requirements of high rotation speed.

[0021] Specifically, in the prior art, the cage of the bearing is guided by the inner ring, that is, during the operation of the bearing, the shaft will collide with the cage, and this collision can correct the position and shape of the cage, which is beneficial to the operation of the bearing. However, it is precisely because of this inner ring-guided structure that the bearing speed is difficult to further increase, and even causes damage to the cage. Another reason why the bearing speed is difficult to further increase is that as the bearing speed increases, the lubrication of the rotating parts will also be affected, especially the poor lubrication between the cage and the surrounding parts will affect the operation of the bearing and cause damage to the cage.

[0022] Therefore, the utility model provides a high-speed bearing, which can overcome the above problems and enable the rotation speed of the high-speed bearing to reach above 150,000 rpm.

[0023] See also Figure 1 In the preferred embodiment shown, the high-speed bearing comprises a shaft 1, an outer ring 2, rolling elements 3 and a cage 4. The rolling elements 3 are arranged in two rows. The shaft 1 and the outer ring 2 respectively comprise grooves (not marked) for accommodating the rolling elements 3.

[0024] Figure 2 Shows Figure 1 According to the preferred embodiment of the utility model, along the radial direction, the retainer 4 has an outer peripheral surface 41 and an inner peripheral surface 42. Furthermore, the gap between the outer peripheral surface 41 and the inner surface 21 of the outer ring 2 is smaller than the gap between the inner peripheral surface and the outer surface 11 of the shaft 1. Figure 2 shown.

[0025] The utility model improves the inner ring guiding method of the prior art to the outer ring guiding method, that is, the cage is closer to the outer ring, so that during the operation of the bearing, the outer ring will collide with the cage, thereby correcting the position and shape of the cage. This outer ring guiding overcomes the above problems in the prior art, so that the bearing speed can be further increased, even up to 150,000 rpm or more.

[0026] Preferably, in the high-speed bearing, the shaft has a consistent diameter along the axial direction. That is to say, the utility model removes the shaft shoulder set on the shaft and between the two rows of rolling elements in the prior art, and the entire shaft has the same diameter. In the prior art, the shaft shoulder is generally considered to be able to bring a certain rigidity to the shaft. However, due to the existence of the shaft shoulder, when processing the grooves on both sides, it is necessary to rely on the shaft shoulder for two positionings respectively, and each positioning is for processing one side of the groove. However, the accuracy of the two positionings is difficult to guarantee, which will cause inconsistent processing accuracy of the grooves, further hindering the increase in bearing speed. The utility model removes this shaft shoulder, so that only one positioning is required at both ends of the shaft to process the grooves on both sides, which ensures the processing accuracy of the grooves on both sides, so that the bearing speed can be further increased.

[0027] In addition, the utility model also provides a retaining frame for a high-speed bearing.

[0028] See also Figure 3-5 In a preferred embodiment, the cage is an L-shaped cage having a radial wall 43 and a circumferential wall 44 intersecting each other. It should be understood that the "L-shaped" means that the cage has a substantially L-shaped shape when viewed from a cross section.

[0029] Specifically, the circumferential wall 44 extends in the axial direction and surrounds the shaft in the circumferential direction. Pockets 45 for accommodating the rolling elements 3 are formed in the circumferential wall 44; preferably, each pocket 45 is separated by a gap 450. The radial wall 43 extends radially substantially perpendicular to the circumferential wall 44. According to the utility model, the outer peripheral surface 41 of the radial wall 43 has one or more material removal portions 46, such as Figure 4 and Figure 5 shown.

[0030] By forming such a material removal portion, a recessed area relative to the outer surface (i.e., the outermost circumferential surface) of the retainer is formed. This recessed area helps to accommodate more lubricant, improves the rotational contact between the retainer and the outer ring, thereby being more conducive to the outer ring guiding as before, while also providing additional lubrication for other rotating parts of the bearing.

[0031] Preferably, one or more material removal portions 46 are formed as a flat surface or an arc-shaped concave surface. Figure 3-5 In a preferred embodiment of the present invention, the material removal portion is formed as an arc-shaped concave surface.

[0032] In addition, the utility model also proposes another improvement to the retaining frame. Figure 6-8 In another preferred embodiment, the cage includes one or more grooves 47 formed in the inner side of the circumferential wall 44 at a portion close to the radial wall 43. By forming such grooves, an area for accommodating more lubricant can be formed on the inner side of the cage to further improve the lubrication condition of the entire bearing, thereby better adapting to high speeds above 150,000 rpm.

[0033] Preferably, one or more grooves 47 have openings 470 formed in the radial wall 43, such as Figure 8 The opening allows the lubricant to freely flow into and out of the groove, thereby improving the fluidity of the lubricant.

[0034] Preferably, each of the one or more grooves 47 is formed corresponding to a corresponding gap 450 between the pockets 45 and communicates with the corresponding gap 450, such as Figure 8 This communication between the gap 450 and the groove 47 further promotes the flow of lubricant.

[0035] Preferably, although not shown, the present invention also proposes Figure 3-5 The preferred embodiment of Figure 6-8 Specifically, the number and position of the one or more material removal portions 46 may correspond to the number and position of the one or more grooves 47. With this arrangement, the material removal portion 46 may more easily obtain the lubricant from the groove 47 (and the gap 450), which is more conducive to the material removal portion 46 playing its role of storing and supplying lubricant.

[0036] In summary, in order to meet the high speed requirement of 150,000 rpm, especially for such high-speed bearings in textile machines, the utility model proposes improvements to the bearing structure and the bearing cage. By changing the guide mode of the cage, the shape and position correction of the cage are improved; by modifying the structure of the cage, the lubrication condition of the bearing is improved. The utility model overcomes the problem that the bearing speed cannot be further increased in the prior art, and realizes that the bearing can still run smoothly at a high speed of more than 150,000 rpm.

[0037] The exemplary implementation modes of the present disclosure are described in detail above with reference to the preferred embodiments. However, it can be understood by those skilled in the art that, without departing from the concept of the present disclosure, various modifications and variations can be made to the above-mentioned specific embodiments, and various technical features and structures proposed in the present disclosure can be combined in various ways without exceeding the protection scope of the present disclosure, which is determined by the attached claims.

Claims

1. A retainer (4) for a high-speed bearing, wherein the rotation speed of the high-speed bearing is above 150,000 rpm, the retainer (4) being an L-shaped retainer (4) having a radial wall (43) and a circumferential wall (44) intersecting each other, characterized in that: The outer peripheral surface (41) of the radial wall (43) has one or more material removal portions (46), and the retaining frame (4) includes pockets (45) formed in the circumferential wall (44), and each pocket (45) is separated by a gap (450); wherein the retaining frame (4) includes one or more grooves (47) formed in the inner side surface of the circumferential wall (44) at a portion close to the radial wall (43), and each of the one or more grooves (47) is formed corresponding to a corresponding gap (450) between the pockets (45) and communicates with the corresponding gap (450).

2. The retaining frame (4) according to claim 1, characterized in that: The one or more material removal portions (46) are formed as a flat surface or an arc-shaped concave surface.

3. The retaining frame (4) according to claim 1, characterized in that: The one or more grooves (47) have openings formed in the radial wall (43).

4. The retaining frame (4) according to claim 1, characterized in that: The number and position of the one or more material removal portions (46) correspond to the number and position of the one or more grooves (47).

5. A high-speed bearing, wherein the rotation speed of the high-speed bearing is above 150,000 rpm, the high-speed bearing comprising a shaft (1), an outer ring (2), rolling elements (3) and a retaining frame (4), wherein the shaft (1) and the outer ring (2) respectively comprise a groove for accommodating the rolling elements (3); along the radial direction, the retaining frame (4) has an outer peripheral surface (41) and an inner peripheral surface (42), wherein: The gap between the outer circumferential surface (41) and the inner surface (21) of the outer ring (2) is smaller than the gap between the inner circumferential surface (42) and the outer surface (11) of the shaft (1).

6. The high-speed bearing according to claim 5, characterized in that: The retaining frame (4) is the retaining frame (4) according to any one of claims 1 to 4.

7. The high-speed bearing according to claim 5, characterized in that: In the axial direction, the shaft (1) has a uniform diameter.

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