Ray tube anode bearing sealing device

Abstract

The utility model belongs to the technical field of bearings, and discloses a ray tube anode bearing sealing device which comprises a mandrel, a bearing outer ring, a bearing outer sleeve and a sealing piece, a plurality of balls are arranged between the mandrel and the bearing outer ring, and the bearing outer ring is assembled in the bearing outer sleeve; the sealing piece is connected to the bearing outer sleeve and arranged on the side, close to the flange end of the mandrel, of the bearing outer ring, a radial gap is formed between the inner circumferential face of the sealing piece and the outer circumferential face of the mandrel, and at least one annular sealing groove is formed in the inner circumferential face of the sealing piece, so that the sealing piece and the mandrel jointly form a non-contact type sealing structure, and the inner space and the outer space of the bearing are isolated; a solid lubrication film in the bearing is prevented from falling off and invading a cathode and a target disc, and the bulb tube ignition frequency is reduced; foreign matters in the bulb tube can be prevented from entering the bearing, and the service life of the bearing is prolonged; and additional resistance or interference to the rotating motion of the bearing is avoided, so that the bearing is kept in a high-precision and low-friction stable operation state, and the reliability and stability of the bearing are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to bearing technical field especially relates to a ray tube anode bearing sealing device. BACKGROUND

[0002] Traditional bearing adopts open structure design, relies on the lubricating system inside bearing to maintain operation. This structure form cannot effectively isolate the inside and outside space of bearing, and exposes significant drawbacks in the practical application of ray tube anode bearing. When ray tube anode bearing works, the solid lubricating film of bearing unit open end is easy to fall off, and the falling lubricating material can invade between cathode and target disc, causes the frequent ignition of bulb, seriously affects the normal operation and service life of ray tube. Meanwhile, the foreign matter inside bulb is also easy to enter the inside of bearing through open end, causes bearing to be jammed or early failure and other faults, makes the reliability of bearing greatly reduce, and it is difficult to meet the working demand of high precision, high stability of ray tube.

[0003] Therefore, it is urgent to provide a ray tube anode bearing sealing device to solve the above problems. UTILITY MODEL CONTENTS

[0004] The utility model discloses a ray tube anode bearing sealing device, isolates the inside and outside space of bearing, prevents the solid lubricating film in bearing from falling off and invading cathode and target disc, reduces the ignition frequency of bulb, prevents the foreign matter in bulb from entering the inside of bearing, prolongs the service life of bearing, avoids the additional resistance or interference to the rotary motion of bearing, makes the bearing keep the stable operation state of high precision, low friction, significantly improves the reliability and stability of bearing, meets the working requirement of high precision, long life, high stability of ray tube, provides solid guarantee for the safe and efficient operation of ray tube equipment.

[0005] To achieve this purpose, the utility model adopts the following technical scheme:

[0006] A ray tube anode bearing sealing device, including mandrel, bearing outer ring, bearing outer cover and sealing element, be equipped with a plurality of ball between the mandrel with the bearing outer ring, the bearing outer ring is assembled in the bearing outer cover,

[0007] The sealing element is connected to the bearing outer cover and is arranged on one side of the bearing outer ring close to the flange end of the mandrel, a radial gap is formed between the inner periphery of the sealing element and the outer periphery of the mandrel, at least one annular sealing groove is formed in the inner periphery of the sealing element, so that the sealing element and the mandrel form a non-contact sealing structure.

[0008] In some alternative embodiments, the sealing member comprises a first sealing member, which is assembled in the bearing sleeve, a radial gap being formed between the inner periphery of the first sealing member and the outer periphery of the mandrel, and at least one annular sealing groove being formed in the inner periphery of the first sealing member.

[0009] In some alternative embodiments, the first sealing member comprises a base ring and a first sealing portion, the base ring being assembled in the inner wall of the bearing sleeve, the first sealing portion being perpendicular to the base ring and extending towards the flange end of the mandrel, the inner diameter of the first sealing portion being larger than the outer diameter of the mandrel so as to form the radial gap, and the annular sealing groove being formed in the inner periphery of the first sealing portion.

[0010] In some alternative embodiments, the sealing member for the anode bearing of the X-ray tube further comprises a clamping spring, a clamping groove being formed in the inner periphery of the bearing sleeve, the clamping spring being clamped in the clamping groove, the base ring being clamped between the clamping spring and the bearing outer ring, and the clamping spring being sleeved outside the first sealing portion.

[0011] In some alternative embodiments, the diameter of the outer periphery of the first sealing portion gradually decreases along the axial direction towards the flange end of the mandrel.

[0012] In some alternative embodiments, the diameter of the annular sealing groove gradually decreases along the axial direction away from the flange end of the mandrel.

[0013] In some alternative embodiments, the sealing member comprises a second sealing member, which is fixedly connected to the end of the bearing sleeve close to the flange end of the mandrel, a radial gap being formed between the inner periphery of the second sealing member and the outer periphery of the mandrel, and at least one annular sealing groove being formed in the inner periphery of the second sealing member.

[0014] In some alternative embodiments, the outer periphery of the mandrel is convexly provided with a sealing step corresponding to the annular sealing groove, the sealing step being arranged in the corresponding annular sealing groove and having a gap with the inner wall of the annular sealing groove.

[0015] In some alternative embodiments, the second sealing member is composed of at least two second sealing portions.

[0016] In some alternative embodiments, each of the second sealing portions has a stepped joint portion at each end along the length direction of the second sealing portion, and the stepped joint portions of two adjacent second sealing portions can be clamped and matched with each other.

[0017] The utility model discloses the beneficial effect that:

[0018] This invention provides a sealing device for an anode bearing of a X-ray tube, comprising a mandrel, an outer bearing ring, a bearing outer sleeve, and a seal. Multiple balls are disposed between the mandrel and the outer bearing ring, with the outer bearing ring assembled within the bearing outer sleeve. The seal is connected to the bearing outer sleeve and positioned on the side of the outer bearing ring near the mandrel flange end. A radial gap is formed between the inner circumferential surface of the seal and the outer circumferential surface of the mandrel. At least one annular sealing groove is formed on the inner circumferential surface of the seal, allowing the seal and mandrel to form a non-contact sealing structure. This non-contact sealing structure isolates the bearing from the internal and external spaces, preventing the solid lubricating film inside the bearing from falling off and intruding into the cathode and target plate, thus reducing the firing frequency of the X-ray tube. Simultaneously, it prevents foreign objects inside the X-ray tube from entering the bearing, extending bearing life. Furthermore, the seal does not contact the mandrel, avoiding additional resistance or interference to the bearing's rotational movement, maintaining a high-precision, low-friction, and stable operating state, significantly improving the bearing's reliability and stability, meeting the high-precision, long-life, and high-stability requirements of X-ray tubes, and providing a solid guarantee for the safe and efficient operation of X-ray tube equipment. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the ray tube anode bearing sealing device according to Embodiment 2 of this utility model;

[0020] Figure 2 This is an exploded view of the ray tube anode bearing sealing device according to Embodiment 2 of this utility model;

[0021] Figure 3 This is a cross-sectional view of the ray tube anode bearing sealing device according to Embodiment 2 of this utility model;

[0022] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0023] Figure 5 This is a schematic diagram of the structure of the ray tube anode bearing sealing device according to Embodiment 3 of this utility model;

[0024] Figure 6 This is an exploded view of the X-ray tube anode bearing sealing device according to Embodiment 3 of this utility model.

[0025] Figure 7 This is a cross-sectional view of the ray tube anode bearing sealing device according to Embodiment 3 of this utility model.

[0026] Figure 8 This utility model is Figure 7 Enlarged view at point B

[0027] Figure 9 This is a schematic diagram of the structure of the second sealing part of this utility model.

[0028] In the picture:

[0029] 1, mandrel; 2, bearing outer ring; 3, bearing outer sleeve; 4, ball; 5, radial gap; 6, annular sealing groove; 7, first sealing member; 71, bottom ring; 72, first sealing part; 8, circlip; 9, second sealing member; 91, second sealing part; 92, stepped splicing part; 10, sealing step. DETAILED DESCRIPTION

[0030] The utility model will be described in further detail below in connection with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not to limit the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0031] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0032] In the utility model, unless otherwise explicitly specified and limited, the first feature "on" or "below" the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the first feature "on", "above" and "above" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0033] In the description of the embodiment, the terms "up", "down", "right", etc. orientation or position relationship is based on the orientation or position relationship shown in the drawings, only for the convenience of description and simplification operation, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in the description, and have no special meaning.

[0034] Embodiment one

[0035] As Figures 1-9As shown, the present embodiment provides a ray tube anode bearing sealing device, which comprises a mandrel 1, a bearing outer ring 2, a bearing outer sleeve 3 and a sealing element. A plurality of balls 4 are arranged between the mandrel 1 and the bearing outer ring 2, and the bearing outer ring 2 is assembled in the bearing outer sleeve 3. The sealing element is connected to the bearing outer sleeve 3 and arranged on the side of the bearing outer ring 2 close to the flange end of the mandrel 1. A radial gap 5 is formed between the inner circumferential surface of the sealing element and the outer circumferential surface of the mandrel 1, and at least one annular sealing groove 6 is formed in the inner circumferential surface of the sealing element, so that the sealing element and the mandrel 1 form a non-contact sealing structure together.

[0036] The non-contact sealing structure can isolate the inner and outer spaces of the bearing, prevent the solid lubricating film in the bearing from falling off and invading the cathode and the target disc, and reduce the frequency of tube firing. At the same time, it can prevent foreign matter in the tube from entering the interior of the bearing, prolonging the service life of the bearing. In addition, the sealing element does not contact the mandrel 1, which can avoid additional resistance or interference to the rotational movement of the bearing, so that the bearing can maintain a stable operating state with high precision and low friction, significantly improving the reliability and stability of the bearing, meeting the working requirements of high precision, long service life and high stability of the ray tube, and providing a solid guarantee for the safe and efficient operation of the ray tube equipment.

[0037] Through tests, it has been proved that under the same working conditions, after installing the sealing element, the number of tube firing is reduced by more than 60%, effectively reducing the frequency of tube firing of the ray tube.

[0038] Embodiment Two

[0039] As shown, Figures 1-4 In this embodiment, the sealing element of embodiment one is a first sealing element 7, which is assembled in the bearing outer sleeve 3. A radial gap 5 is formed between the inner circumferential surface of the first sealing element 7 and the outer circumferential surface of the mandrel 1, and at least one annular sealing groove 6 is formed in the inner circumferential surface of the first sealing element 7.

[0040] The first sealing element 7 is assembled in the bearing outer sleeve 3, and a high-efficiency non-contact sealing structure is formed through the radial gap 5 between the inner circumferential surface and the outer circumferential surface of the mandrel 1 and the annular sealing groove 6. When realizing the core functions of preventing the invasion of lubricating material into the cathode and the target disc and preventing foreign matter from entering the interior of the bearing, the resistance caused by contact friction is avoided, ensuring that the rotation of the bearing is not affected. At the same time, this installation method does not increase the volume of the ray tube anode bearing, and can be adapted to space-limited working scenes, breaking through the limitation that traditional sealing structures are difficult to apply to compact spaces, greatly improving the environmental adaptability of the bearing; under the premise of ensuring the sealing effect, the compactness and installation compatibility of the internal structure of the ray tube are maintained, providing strong support for the miniaturization and integration design of the ray tube equipment, further improving the reliability and application flexibility of the bearing.

[0041] In the embodiment, the inner circumferential surface of the first sealing member 7 is provided with two annular sealing grooves 6 spaced apart along the axial direction. In other embodiments, the number of annular sealing grooves 6 provided on the inner circumferential surface of the first sealing member 7 can also be one or three, which is not limited herein.

[0042] As shown in the drawings, specifically, the first sealing member 7 includes a bottom ring 71 and a first sealing portion 72, the bottom ring 71 is fitted to the inner wall of the bearing sleeve 3, and the first sealing portion 72 extends perpendicularly to the bottom ring 71 and towards the flange end of the mandrel 1, the inner diameter of the first sealing portion 72 is greater than the outer diameter of the mandrel 1 to form a radial gap 5, and the annular sealing groove 6 is provided on the inner circumferential surface of the first sealing portion 72. Figure 4 The bottom ring 71 is tightly fitted to the inner wall of the bearing sleeve 3 to provide a stable mounting base for the entire sealing member and ensure the stability of the sealing structure during the operation of the x-ray tube; the close-fitting installation of the bottom ring 71 to the inner wall of the bearing sleeve 3 and the layout of the first sealing portion 72 extending towards the flange end of the mandrel 1 not only achieve the sealing function, but also maximize the use of the existing space inside the bearing, which is conducive to improving the environmental adaptability of the sealing structure.

[0043] Optionally, the diameter of the annular sealing groove 6 gradually decreases in the direction away from the flange end of the mandrel 1 along the axial direction, and such a tapered structure can enhance the sealing effect through geometric constraints, further prevent the leakage of lubricating grease, and prevent foreign matter from entering the bearing.

[0044] Optionally, the x-ray tube anode bearing sealing device further comprises a circlip 8, the inner circumferential surface of the bearing sleeve 3 is provided with a clamping groove, the circlip 8 is clamped in the clamping groove, the bottom ring 71 is clamped between the circlip 8 and the bearing outer ring 2, and the circlip 8 is sleeved outside the first sealing portion 72.

[0045] The circlip 8 is clamped in the clamping groove of the inner circumferential surface of the bearing sleeve 3, and the bearing outer ring 2 firmly clamps the bottom ring 71 of the first sealing member 7 together to form a double-limiting fixing mechanism, which effectively prevents the bottom ring 71 from being axially displaced or loosened under the working conditions of high-frequency vibration and high-speed rotation of the x-ray tube, ensures that the sealing structure always remains stable under complex working environments, and enhances the ability of the sealing system to resist harsh working conditions. The design of the circlip 8 being sleeved outside the first sealing portion 72 optimizes the internal space layout while ensuring that the sealing member and the mandrel 1 radial gap 5 and the annular sealing groove 6 normally play a non-contact sealing function, so that the sealing device can still realize reliable sealing and stable assembly in a compact space.

[0046]

[0047] ​Further, the diameter of the outer circumferential surface of the first sealing portion 72 gradually decreases in the direction of the flange end of the shaft 1 along the axial direction, forming a tapered structure. In terms of sealing performance, the tapered structure can guide the small foreign matter inside the bulb tube to slide down along the outer circumferential surface of the first sealing portion 72, effectively preventing it from entering the sealing gap, further reducing the risk of foreign matter entering the bearing interior, and strengthening the non-contact sealing effect. At the same time, the tapered structure can play a guiding role during the assembly of the snap spring 8, improving assembly efficiency and reducing the possibility of sealing failure caused by improper assembly.

[0048] From the perspective of fluid dynamics, the tapered design optimizes the flow path of the internal gas flow and heat flow of the ray tube, reduces vortex generation, and reduces fluid resistance, which helps to improve the heat dissipation efficiency of the ray tube and ensures the operation of the bearing in a stable temperature environment. In addition, this gradual structure enhances the structural strength and deformation resistance of the first sealing portion 72 through reasonable shape design without increasing the overall axial size, so that it maintains a stable form under high-frequency vibration and high-speed rotation conditions of the ray tube, continuously plays a sealing role, and further consolidates the technical advantages of the sealing device in limited space adaptation scenarios, ensuring the long-term reliable operation of the bearing, and providing stronger support for the efficient and stable operation of the ray tube equipment.

[0049] In addition, the first sealing member 7 and the bearing sleeve 3 can also be connected by welding, bonding or clamping, which is not limited here.

[0050] Embodiment Three

[0051] As shown in Figures 5-9 In this embodiment, the sealing member of embodiment one is a second sealing member 9, which is fixedly connected to the end of the bearing sleeve 3 near the flange end of the shaft 1. The inner circumferential surface of the second sealing member 9 and the outer circumferential surface of the shaft 1 form a radial gap 5, and the inner circumferential surface of the second sealing member 9 is provided with at least one annular sealing groove 6, constituting a non-contact sealing system, which can effectively block the invasion of lubricating materials caused by the shedding of solid lubricating film into the cathode and target disc, and resist the entry of foreign matter inside the bulb tube into the bearing, avoiding faults such as bulb tube sparking and bearing jamming.

[0052] The second sealing member 9 is directly fixed to the end of the bearing sleeve 3, which simplifies the assembly process compared to the embedded installation of the first sealing member 7, reduces the cooperation between parts, reduces the assembly complexity and labor cost, and avoids the problem of cumulative dimensional error caused by multi-layer nested assembly, which is conducive to ensuring the installation accuracy of the sealing structure. In addition, the independent installation of the second sealing member 9 inside the bearing sleeve 3 also facilitates later maintenance and replacement. When the second sealing member 9 is worn or its performance decreases, it can be replaced without disassembling the complex internal components of the bearing, significantly improving the maintenance efficiency of the equipment and reducing the maintenance cost, providing strong support for the long-term stable operation of the ray tube anode bearing.

[0053] As shown in Figure 8 Further, the outer circumferential surface of the mandrel 1 is provided with a sealing step 10 corresponding to each annular sealing groove 6. The sealing step 10 is arranged in the corresponding annular sealing groove 6 and has a gap with the inner wall of the annular sealing groove 6, forming a labyrinth sealing channel. Compared with the single radial gap 5 and the annular sealing groove 6, the sealing efficiency of the labyrinth sealing channel increases exponentially, which can greatly reduce the possibility of lubricating material invading the cathode and the target disc and foreign matter entering the bearing, and eliminate the hidden troubles of ball tube sparking and bearing jamming from the root, and significantly improve the running stability and service life of the ray tube.

[0054] During operation, the gap in the labyrinth sealing channel not only ensures the free rotation of the mandrel 1 without obstruction, but also effectively reduces the vibration and noise generated by the high-speed rotation of the bearing through the buffering effect of the air layer, optimizing the equipment operation experience. At the same time, the gap between the sealing step 10 and the inner wall of the annular sealing groove 6 can also store a small amount of lubricating medium, forming a self-lubricating effect, reducing the wear of the sealing structure itself, and prolonging the service life of the sealing element.

[0055] In the embodiment, the inner circumferential surface of the second sealing element 9 is spaced apart in the axial direction and provided with two annular sealing grooves 6, and the outer circumferential surface of the mandrel 1 is correspondingly provided with two sealing steps 10. In other embodiments, the number of annular sealing grooves 6 opened on the inner circumferential surface of the second sealing element 9 can also be one or three, and the number of sealing steps 10 protruding on the outer circumferential surface of the mandrel 1 corresponds to one or three, which is not limited here.

[0056] As shown in Figure 6 Optionally, the second sealing element 9 is composed of at least two second sealing parts 91, and the split structure can make the annular sealing groove 6 arranged outside the sealing step 10, effectively reducing the assembly and processing difficulty.

[0057] As shown in Figure 9 Further, each second sealing part 91 has a stepped split part 92 at both ends in the length direction, and the stepped split parts 92 of the adjacent two second sealing parts 91 can be mutually clamped and matched, so as to improve the sealing performance of the split surface between the adjacent second sealing parts 91 and ensure the sealing effect of the bearing.

[0058] The connection mode of the second sealing element 9 and the bearing outer sleeve 3 includes but is not limited to welding, bonding or clamping, which is not limited here.

[0059] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claim.

Claims

1. A sealing device for an anode bearing of a ray tube, characterized in that, It includes a spindle (1), a bearing outer ring (2), a bearing outer sleeve (3) and a seal. A plurality of balls (4) are provided between the spindle (1) and the bearing outer ring (2). The bearing outer ring (2) is assembled inside the bearing outer sleeve (3). The seal is connected to the bearing outer sleeve (3) and is located on the side of the bearing outer ring (2) near the flange end of the mandrel (1). A radial gap (5) is formed between the inner circumferential surface of the seal and the outer circumferential surface of the mandrel (1). At least one annular sealing groove (6) is provided on the inner circumferential surface of the seal so that the seal and the mandrel (1) together form a non-contact sealing structure.

2. The ray tube anode bearing sealing device according to claim 1, characterized in that, The sealing element includes a first sealing element (7), which is assembled inside the bearing outer sleeve (3). The radial gap (5) is formed between the inner circumferential surface of the first sealing element (7) and the outer circumferential surface of the mandrel (1). At least one annular sealing groove (6) is provided on the inner circumferential surface of the first sealing element (7).

3. The ray tube anode bearing sealing device according to claim 2, characterized in that, The first seal (7) includes a bottom ring (71) and a first sealing part (72). The bottom ring (71) is fitted to the inner wall of the bearing outer sleeve (3). The first sealing part (72) is perpendicular to the bottom ring (71) and extends toward the flange end of the mandrel (1). The inner diameter of the first sealing part (72) is larger than the outer diameter of the mandrel (1) to form the radial gap (5). The annular sealing groove (6) is formed on the inner circumferential surface of the first sealing part (72).

4. The ray tube anode bearing sealing device according to claim 3, characterized in that, The ray tube anode bearing sealing device also includes a retaining ring (8). The inner circumferential surface of the bearing outer sleeve (3) is provided with a retaining groove. The retaining ring (8) is engaged in the retaining groove. The bottom ring (71) is sandwiched between the retaining ring (8) and the bearing outer ring (2). The retaining ring (8) is sleeved on the outside of the first sealing part (72).

5. The ray tube anode bearing sealing device according to claim 4, characterized in that, The diameter of the outer peripheral surface of the first sealing part (72) gradually decreases along its axial direction toward the flange end of the mandrel (1).

6. The ray tube anode bearing sealing device according to any one of claims 2 to 5, characterized in that, The diameter of the annular sealing groove (6) gradually decreases along its axial direction away from the flange end of the mandrel (1).

7. The ray tube anode bearing sealing device according to claim 1, characterized in that, The sealing element includes a second sealing element (9), which is fixedly connected to the end of the bearing outer sleeve (3) near the flange end of the mandrel (1). The radial gap (5) is formed between the inner circumferential surface of the second sealing element (9) and the outer circumferential surface of the mandrel (1). At least one annular sealing groove (6) is provided on the inner circumferential surface of the second sealing element (9).

8. The ray tube anode bearing sealing device according to claim 7, characterized in that, The outer circumferential surface of the mandrel (1) is provided with sealing steps (10) that correspond one-to-one with the annular sealing groove (6). The sealing steps (10) are disposed in the corresponding annular sealing groove (6) and have a gap with the inner wall of the annular sealing groove (6).

9. The ray tube anode bearing sealing device according to claim 8, characterized in that, The second seal (9) is composed of at least two second seal parts (91) joined together.

10. The ray tube anode bearing sealing device according to claim 9, characterized in that, Each of the second sealing parts (91) has stepped joints (92) at both ends along its length direction, and the stepped joints (92) of two adjacent second sealing parts (91) can be engaged with each other.

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