Bearing for CT bulb tube and bearing sleeve for bearing
By dividing the CT ball tube bearing sleeve into two parts, using diffused copper in the front and martensite stainless steel in the rear, the problems of low thermal conductivity and high cost in the existing technology are solved, and effective heat dissipation and cost reduction are achieved , extends the service life of the bearing.
Patent Information
- Application Number
- CN202323665745.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2033-12-29
AI Technical Summary
In the prior art, the material using martensitic stainless steel as the bearing sleeve has a low thermal conductivity, which affects the service life of the bearing. The cost of using diffused copper as the material is high, and there is no effective solution.
The bearing sleeve is divided into two parts, with high thermal conductivity diffused copper material on the front, and low-cost and thermally stable martensite stainless steel material on the rear, which ensures heat dissipation and reduces costs through brazing.
It not only meets the heat dissipation requirements but also reduces the bearing production cost, extends the service life of the bearing, and solves the problems of low thermal conductivity and high cost.
Smart Images
Figure CN222277259U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of bearing manufacturing, and in particular to a bearing for a CT tube and a bearing sleeve for the bearing. Background Art
[0002] For CT machines, the performance of the bearing is the key to the operation of the entire CT tube and will directly affect the overall performance of the CT machine. Therefore, the bearing and the bearing sleeve that matches the bearing are crucial to the normal operation of the CT machine.
[0003] Since the operating temperature of the bearings in the CT machine is relatively high (the temperature of the flange end of the bearing sleeve can reach 450℃~500℃, and the temperature of the rear end of the bearing sleeve can reach 250℃~350℃), the bearing sleeve needs to have good thermal conductivity to transfer heat to the outside. In addition, there needs to be a good thermal expansion fit between the bearing sleeve and the bearing to prevent the bearing from getting stuck due to over-tightening or the bearing sleeve from not being able to support and fix due to over-loosening.
[0004] At present, martensitic stainless steel and copper sleeves are mostly used as materials for bearing sleeves. However, no matter which material is used to make bearing sleeves, there are corresponding defects. For example, the characteristic of martensitic stainless steel is good rigidity, but the disadvantage is low thermal conductivity. The characteristic of copper sleeves is high thermal conductivity and the rigidity also meets the requirements, but the disadvantage is high cost.
[0005] There are technical problems in the above-mentioned prior art that martensitic stainless steel is used as the manufacturing material of the entire bearing sleeve, which has low thermal conductivity and may affect the service life of the bearing; and dispersed copper is used as the manufacturing material of the entire bearing sleeve, which has high cost. No effective solution has been proposed yet. Utility Model Content
[0006] The utility model provides a bearing for a CT tube and a bearing sleeve for the bearing, so as to at least solve the technical problems existing in the prior art that martensitic stainless steel is used as the manufacturing material of the entire bearing sleeve, the thermal conductivity is low, which may affect the service life of the bearing; and dispersed copper is used as the manufacturing material of the entire bearing sleeve, which has a high cost.
[0007] According to one aspect of the present application, a bearing for a CT tube is provided, comprising: a core shaft, a C-shaped ring, a first outer ring and a second outer ring, wherein the first outer ring and the second outer ring are respectively sleeved on the outside of the core shaft; the C-shaped ring is sleeved on the outside of the core shaft and abuts against the first outer ring and the second outer ring, respectively, and also comprises: a first bearing sleeve arranged at the front of the bearing and a second bearing sleeve arranged at the rear of the bearing, wherein the first bearing sleeve and the second bearing sleeve are fixedly connected; the first bearing sleeve is sleeved on the outside of the first outer ring and abuts against the first outer ring; the second bearing sleeve is sleeved on the outside of the C-shaped ring and the second outer ring and abuts against the C-shaped ring and the second outer ring; the first bearing sleeve is made of dispersed copper; and the second bearing sleeve is made of martensitic stainless steel.
[0008] Optionally, the first bearing sleeve and the second bearing sleeve are connected by brazing.
[0009] Optionally, it also includes: a first steel ball, a second steel ball, a third steel ball and a fourth steel ball, wherein the first steel ball and the second steel ball are respectively arranged in the raceway formed by the core shaft and the first outer ring; and the third steel ball and the fourth steel ball are respectively arranged in the raceway formed by the core shaft and the second outer ring.
[0010] According to another aspect of the present application, a bearing sleeve for a bearing is provided, comprising: a first bearing sleeve arranged at the front of the bearing and a second bearing sleeve arranged at the rear of the bearing, wherein the first bearing sleeve and the second bearing sleeve are fixedly connected; the first bearing sleeve is arranged on the outside of the first outer ring and abuts against the first outer ring; the second bearing sleeve is arranged on the outside of the C-shaped ring and the second outer ring and abuts against the C-shaped ring and the second outer ring; the first bearing sleeve is made of dispersed copper; and the second bearing sleeve is made of martensitic stainless steel.
[0011] With reference to the above-mentioned contents, different from the prior art, the present application divides the whole bearing sleeve into two (i.e., the first bearing sleeve and the second bearing sleeve), and selects different manufacturing materials according to the installation positions of the first bearing sleeve and the second bearing sleeve. That is, since the raceway temperature at the front of the bearing is relatively high, it has a greater impact on the bearing performance and bearing life, so it is necessary to select dispersed copper with higher thermal conductivity as the manufacturing material of the first bearing sleeve installed at the front of the bearing; since heat loss occurs during the process of heat transfer from the front of the bearing to the rear of the bearing, the temperature at the rear of the bearing is relatively low, so it is necessary to use martensitic stainless steel with lower cost and better thermal stability as the manufacturing material of the second bearing sleeve installed at the rear of the bearing.
[0012] Thus, the technical effect of satisfying the heat dissipation requirement and reducing the bearing manufacturing cost is achieved, and the technical problems existing in the prior art that the martensitic stainless steel is used as the manufacturing material of the entire bearing sleeve, the thermal conductivity is low, and thus the service life of the bearing may be affected; and the dispersed copper is used as the manufacturing material of the entire bearing sleeve, and the cost is high are solved.
[0013] Based on the detailed description of the specific embodiments of the present application in combination with the accompanying drawings below, those skilled in the art will become more aware of the above and other purposes, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Hereinafter, some specific embodiments of the present application will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:
[0015] Figure 1 It is a schematic diagram of the structure of a bearing for a CT tube according to an embodiment of the present application. DETAILED DESCRIPTION
[0016] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.
[0017] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.
[0018] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchanged where appropriate, so as to describe the embodiments of the present invention described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.
[0019] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.
[0020] Figure 1 Schematic diagram of the structure of the bearing for CT tube according to the embodiment of the present application. Figure 1 As shown, the present application provides a bearing 10 for a CT tube, comprising: a core shaft 110, a C-shaped ring 120, a first outer ring 131, and a second outer ring 132, wherein the first outer ring 131 and the second outer ring 132 are respectively sleeved on the outside of the core shaft 110; the C-shaped ring 120 is sleeved on the outside of the core shaft 110 and abuts against the first outer ring 131 and the second outer ring 132 respectively, and further comprising: a first bearing sleeve 141 arranged at the front of the bearing 10 and a second outer ring 142 arranged at the rear of the bearing 10 The second bearing sleeve 142 is provided, wherein the first bearing sleeve 141 and the second bearing sleeve 142 are fixedly connected; the first bearing sleeve 141 is sleeved on the outside of the first outer ring 131 and abuts against the first outer ring 131; the second bearing sleeve 142 is sleeved on the outside of the C-shaped ring 120 and the second outer ring 132 and abuts against the C-shaped ring 120 and the second outer ring 132; the first bearing sleeve 141 is made of dispersed copper; and the second bearing sleeve 142 is made of martensitic stainless steel.
[0021] As described in the background technology, since the operating temperature of the bearings in the CT machine is relatively high (the temperature of the flange end of the bearing sleeve can reach 450℃~500℃, and the temperature of the rear end of the bearing sleeve can reach 250℃~350℃), the bearing sleeve needs to have good thermal conductivity to transfer heat to the outside. In addition, there needs to be a good thermal expansion fit between the bearing sleeve and the bearing to prevent the bearing from getting stuck due to over-tightening or the bearing sleeve from not being able to support and fix due to over-loosening.
[0022] At present, martensitic stainless steel and copper sleeves are mostly used as materials for bearing sleeves. However, no matter which material is used to make bearing sleeves, there are corresponding defects. For example, the characteristic of martensitic stainless steel is good rigidity, but the disadvantage is low thermal conductivity. The characteristic of copper sleeves is high thermal conductivity and the rigidity also meets the requirements, but the disadvantage is high cost.
[0023] In view of this, the present application provides a bearing for a CT tube. Figure 1 As shown, the bearing 10 further includes a first bearing sleeve 141 disposed at the front of the bearing 10 and a second bearing sleeve 142 disposed at the rear of the bearing 10 .
[0024] And wherein, the first bearing sleeve 141 is fixedly connected with the second bearing sleeve 142. The first bearing sleeve 141 is sleeved on the outside of the first outer ring 131 and abuts against the first outer ring 131. The second bearing sleeve 142 is sleeved on the outside of the C-shaped ring 120 and the second outer ring 132 and abuts against the C-shaped ring 120 and the second outer ring 132. Therefore, the bearing sleeve structure in this embodiment actually uses a composite structure of the first bearing sleeve 141 and the second bearing sleeve 142. And because the first bearing sleeve 141 is arranged at the front of the bearing 10, and the raceway temperature at the front of the bearing 10 is relatively high, it has a greater impact on the performance and life of the bearing 10, so in this embodiment, dispersed copper with increased thermal conductivity is selected as the manufacturing material of the first bearing sleeve 141 installed at the front of the bearing 10. Furthermore, since the second bearing sleeve 142 is arranged at the rear of the bearing 10, and heat loss occurs in the process of transferring from the front of the bearing 10 to the rear of the bearing 10, the temperature at the rear of the bearing 10 is relatively low. Therefore, this embodiment selects martensitic stainless steel with low cost and good thermal stability as the manufacturing material of the second bearing sleeve 142 installed at the rear of the bearing 10.
[0025] Thus, the technical effect of satisfying the heat dissipation requirement and reducing the bearing manufacturing cost is achieved, and the technical problems existing in the prior art that the martensitic stainless steel is used as the manufacturing material of the entire bearing sleeve, the thermal conductivity is low, and thus the service life of the bearing may be affected; and the dispersed copper is used as the manufacturing material of the entire bearing sleeve, and the cost is high are solved.
[0026] In addition, it is worth noting that those skilled in the art should understand that the bearing 10 indicated in this embodiment includes but is not limited to a positioning preload bearing and a constant pressure preload bearing.
[0027] Furthermore, it is worth noting that the above only exemplarily points out that the first bearing sleeve 141 is made of dispersed copper and the second bearing sleeve 142 is made of martensitic stainless steel, but the materials actually used are not limited thereto, and other materials can be selected based on actual conditions.
[0028] Optionally, the first bearing sleeve 141 and the second bearing sleeve 142 are connected by brazing, so as to facilitate the positioning of the first bearing sleeve 141 and the second bearing sleeve 142 and prevent deviation when assembling the first bearing sleeve 141 and the second bearing sleeve 142.
[0029] Optionally, it also includes: a first steel ball 151, a second steel ball 152, a third steel ball 153 and a fourth steel ball 154, wherein the first steel ball 151 and the second steel ball 152 are respectively arranged in the raceway formed by the core shaft 110 and the first outer ring 131; and the third steel ball 153 and the fourth steel ball 154 are respectively arranged in the raceway formed by the core shaft 110 and the second outer ring 132.
[0030] According to another aspect of an embodiment of the present application, a bearing sleeve for a bearing is also provided, including: a first bearing sleeve 141 arranged at the front of the bearing 10 and a second bearing sleeve 142 arranged at the rear of the bearing 10, wherein the first bearing sleeve 141 and the second bearing sleeve 142 are fixedly connected; the first bearing sleeve 141 is sleeved on the outside of the first outer ring 131 and abuts against the first outer ring 131; the second bearing sleeve 142 is sleeved on the outside of the C-ring 120 and the second outer ring 132 and abuts against the C-ring 120 and the second outer ring 132; the first bearing sleeve 141 is made of dispersed copper; and the second bearing sleeve 142 is made of martensitic stainless steel.
[0031] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values of the parts and steps described in these embodiments do not limit the scope of the utility model. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in one drawing, it does not need to be further discussed in subsequent drawings.
[0032] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0033] In the description of the present utility model, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present utility model; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.
[0034] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.
Claims
1. A bearing (10) for a CT tube, comprising: A core shaft (110), a C-shaped ring (120), a first outer ring (131) and a second outer ring (132), wherein the first outer ring (131) and the second outer ring (132) are respectively sleeved on the outside of the core shaft (110); the C-shaped ring (120) is sleeved on the outside of the core shaft (110) and abuts against the first outer ring (131) and the second outer ring (132), respectively, and is characterized in that it also includes: a first bearing sleeve (141) arranged at the front part of the bearing (10) and a second bearing sleeve (142) arranged at the rear part of the bearing (10), wherein The first bearing sleeve (141) and the second bearing sleeve (142) are fixedly connected; The first bearing sleeve (141) is sleeved on the outside of the first outer ring (131) and abuts against the first outer ring (131); The second bearing sleeve (142) is sleeved outside the C-shaped ring (120) and the second outer ring (132), and is in contact with the C-shaped ring (120) and the second outer ring (132); The first bearing sleeve (141) is made of dispersed copper; and The second bearing sleeve (142) is made of martensitic stainless steel.
2. The bearing according to claim 1, characterized in that: The first bearing sleeve (141) and the second bearing sleeve (142) are connected by brazing.
3. The bearing according to claim 1, characterized in that: Also includes: A first steel ball (151), a second steel ball (152), a third steel ball (153) and a fourth steel ball (154), wherein The first steel ball (151) and the second steel ball (152) are respectively arranged in a raceway formed by the core shaft (110) and the first outer ring (131); and The third steel ball (153) and the fourth steel ball (154) are respectively arranged in a raceway formed by the core shaft (110) and the second outer ring (132).
4. A bearing sleeve for a bearing, characterized in that: include: A first bearing sleeve (141) is arranged at the front of the bearing (10) and a second bearing sleeve (142) is arranged at the rear of the bearing (10), wherein The first bearing sleeve (141) and the second bearing sleeve (142) are fixedly connected; The first bearing sleeve (141) is sleeved on the outside of the first outer ring (131) and abuts against the first outer ring (131); The second bearing sleeve (142) is sleeved outside the C-shaped ring (120) and the second outer ring (132), and is in contact with the C-shaped ring (120) and the second outer ring (132); The first bearing sleeve (141) is made of dispersed copper; and The second bearing sleeve (142) is made of martensitic stainless steel.
Citation Information
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