Anti-spalling high-temperature-resistant bearing
By installing an expansion sleeve on the inner wall of the bearing inner ring and using a bearing component made of silicon nitride, the problem of bearing inner ring deformation caused by the expansion of the connecting shaft at high temperatures is solved, achieving anti-expansion cracking and high-temperature stability of the bearing, and extending its service life.
Patent Information
- Application Number
- CN202520164116.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-24
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2035-01-24
AI Technical Summary
Under extreme conditions of high temperature and high speed, the connecting shaft of the equipment is prone to high temperature expansion, which can cause the inner ring of the bearing to deform or break.
An expansion sleeve is installed on the inner wall of the bearing inner ring. Its own deformation offsets the thermal expansion deformation of the connecting shaft. The bearing outer ring, inner ring and balls are made of silicon nitride material, and a cage made of high temperature resistant steel or silicon nitride material is used to enhance the high temperature resistance of the bearing.
It effectively prevents the inner ring of the bearing from cracking, improves the reliability and service life of the bearing, ensures stable operation in high-temperature environments of 400-1100 degrees Celsius, and reduces bearing failure.
Smart Images
Figure CN223524217U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of high temperature resistant bearing, especially to a high temperature resistant bearing of preventing burst. BACKGROUND
[0002] Bearing is an important part in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient in its movement process, and ensure its rotation accuracy. In high temperature, high speed and heavy load extreme working conditions, as a key component in mechanical equipment, the performance of the bearing directly affects the running stability and service life of the whole equipment. Ceramic bearings gradually become the first choice for bearings in extreme working conditions due to their excellent high temperature resistance, low friction coefficient, high hardness and good corrosion resistance. Ceramic materials such as silicon nitride and zirconia have low thermal expansion coefficient, excellent high temperature red hardness and stable high temperature mechanical properties at high temperature, effectively reducing the rotation accuracy decline and even transmission failure caused by high temperature deformation.
[0003] However, although the bearing of ceramic material can be applied in high temperature environment, the connecting shaft connected in the inner ring of the bearing is generally made of metal material. Since the thermal expansion coefficient of metal material is greater than that of ceramic material, in extreme working conditions of high temperature and high speed, the connecting shaft of the equipment is prone to high temperature expansion and deformation, resulting in deformation or fragmentation of the inner ring of the bearing. SUMMARY
[0004] In order to solve the problem that the connecting shaft of the equipment is prone to high temperature expansion and deformation in the extreme working conditions of high temperature and high speed, resulting in deformation or fragmentation of the inner ring of the bearing in the prior art, the utility model provides a high temperature resistant bearing of preventing burst;
[0005] The utility model discloses a kind of high temperature resistant bearings of preventing burst, using following technical scheme:
[0006] A kind of high temperature resistant bearing of preventing burst, including bearing outer ring, bearing inner ring and ball, the inner side wall of the bearing outer ring is equipped with first channel, the outer side wall of the bearing inner ring is equipped with second channel, the ball is connected between first channel and second channel and rolls, the side wall of the bearing outer ring and bearing inner ring is equipped with ball mounting gap, the inner side wall of the bearing inner ring is provided with expansion sleeve for offsetting deformation when connecting shaft is heated and expanded.
[0007] Further, the inner side wall of the bearing inner ring is equipped with mounting groove, and the expansion sleeve is embedded in the mounting groove.
[0008] Further, the expansion sleeve includes a ring body and a protrusion, and the side wall of the ring body forms a plurality of protrusions that can deform.
[0009] Further, a discontinuous groove is formed on the sidewall of the ring body.
[0010] Further, the number of the protrusions is N, and N is greater than or equal to 2; the protrusions are distributed at equal intervals in a circumferential direction.
[0011] Further, the protrusions are in any one shape of a rectangle, a rounded rectangle, a triangle, and a circle, and edges of the protrusions are rounded.
[0012] Further, the bearing outer ring, the bearing inner ring, and the ball are made of silicon nitride.
[0013] Further, a retainer is arranged between the first groove and the second groove, and the ball is connected between the first groove and the second groove through the retainer.
[0014] Further, the retainer is made of high-temperature-resistant steel or silicon nitride.
[0015] In summary, the utility model has the advantages that:
[0016] The utility model discloses a bearing inner ring, bearing outer ring and ball are made of silicon nitride, can work in the high-temperature environment of 400-1100 degrees, improve the high-temperature resistance of bearing significantly, make it can work stably for a long time in the high-temperature environment, reduce the bearing failure problem caused by high temperature, and simultaneously, the retainer made of high-temperature-resistant steel or silicon nitride is matched with the high-temperature resistance of other parts of bearing, further improves the overall high-temperature resistance and stability of bearing. BRIEF DESCRIPTION OF DRAWINGS
[0017] Figure 1 It is the front view schematic drawing of the second embodiment of the utility model;
[0018] Figure 2 It is the front view schematic drawing of the second embodiment of the utility model;
[0019] Figure 3 It is the explosion drawing of the second embodiment of the utility model;
[0020] Figure 4 It is the front view schematic drawing of the first embodiment of the utility model;
[0021] Figure 5 It is the explosion drawing of the third embodiment of the utility model;
[0022] Figure 6 It is the structure schematic drawing of the utility model expansion sleeve;
[0023] Figure 7 It is the schematic diagram of the expansion sleeve structure of the utility model.
[0024] As shown in the figure: 1-bearing outer ring, 2-bearing inner ring, 3-rolling ball, 4-retainer, 5-first channel, 6-second channel, 7-expansion sleeve, 8-ring body, 9-protrusion, 10-groove, 11-ball mounting gap, 12-mounting groove. DETAILED DESCRIPTION
[0025] The following will be combined with the attached Figure 1 -attached Figure 7 Further detailed description of the utility model:
[0026] The utility model discloses an anti-explosion high temperature resistant bearing, as shown in the figure: Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 The utility model discloses an anti-explosion high temperature resistant bearing, which comprises a bearing outer ring 1, a bearing inner ring 2 and a rolling ball 3, a first channel 5 is formed in the inner side wall of the bearing outer ring 1, a second channel 6 is formed in the outer side wall of the bearing inner ring 2, the rolling ball 3 is connected in rolling between the first channel 5 and the second channel 6, the side wall of the bearing outer ring 1 and the bearing inner ring 2 is provided with a ball mounting gap, and the inner side wall of the bearing inner ring 2 is provided with an expansion sleeve 7 for offsetting deformation when the connecting shaft is heated and expanded. Figure 1 、 Figure 2 、 Figure 3 The utility model discloses a second embodiment, Figure 4 The utility model discloses a first embodiment, and the difference between the first embodiment and the second embodiment is the mounting mode and position of the expansion sleeve 7. Figure 4 As shown in the figure, in the first embodiment, the expansion sleeve 7 is clamped in the bearing inner ring 2, the connecting shaft is inserted into the expansion sleeve 7, and the connecting shaft, the expansion sleeve 7 and the bearing inner ring 2 are in interference fit. Figure 1 、 Figure 2 、 Figure 3In the second embodiment shown, an installation groove 11 is provided on the inner wall of the bearing inner ring 2, and an expansion sleeve 7 is embedded in the installation groove 11. The connecting shaft is inserted into the expansion sleeve 7 in the installation groove 11. The bearing outer ring 1 is fixedly connected to the bearing housing, and the bearing inner ring 2 is fixedly connected to the connecting shaft. The ball bearing 3 is used to separate the bearing inner ring 2 and the bearing outer ring 1 and allow them to move relative to each other. The expansion sleeve 7 is embedded inside the bearing inner ring 2. Other connection methods commonly used by those skilled in the art can also be used. As long as the expansion sleeve 7 is placed inside the bearing inner ring 2, the connection with the connecting shaft can be achieved. By providing an expansion sleeve 7 on the inner wall of the bearing inner ring 2, the deformation of the connecting shaft can be offset by its own deformation when the connecting shaft expands due to heat, effectively avoiding the situation where the bearing inner ring 2 cracks due to the thermal expansion of the connecting shaft, thus improving the reliability and service life of the bearing. Preferably, the outer ring 1, inner ring 2, and balls 3 of the bearing are all made of silicon nitride. Bearings made of silicon nitride can work in high-temperature environments of 400-1100 degrees Celsius, which significantly improves the high-temperature resistance of the bearing, enabling it to work stably for a long time in high-temperature environments and reducing bearing failure caused by high temperatures.
[0027] like Figure 6 , Figure 7 As shown, the expansion sleeve 7 includes a ring body 8 and protrusions 9. The sidewall of the ring body 8 has a plurality of deformable protrusions 9. In this embodiment, the specific shape and location of the protrusions 9 are as follows: Figure 4 As shown, the protrusion 9 faces towards the outer ring 1 of the bearing. When the connecting shaft expands due to heat, it will radially compress the ring 8, which in turn compresses the protrusion 9 on the side wall of the ring 8. The protrusion 9 will deform, and its deformation will offset the deformation of the connecting shaft, keeping the overall inner diameter unchanged, thus preventing the inner ring 2 of the bearing from cracking. After the temperature drops, the connecting shaft will return to its original size, reducing the compression on the ring 8, and the protrusion 9 will also return to its original shape. Preferably, the number of protrusions 9 is N, where N≥2; the protrusions 9 are evenly spaced circumferentially distributed. Preferably, the shape of the protrusion 9 is any one of rectangle, rounded rectangle, triangle, or circle, with rounded edges.
[0028] like Figure 7 As shown, a groove 10 is formed on the side wall of the ring 8, creating a non-closed-loop structure; in this embodiment, the shape of the ring 8 is as follows. Figure 4 As shown, the design of the groove 10 can better adapt to deformation and improve its ability to absorb and offset deformation.
[0029] like Figure 5 As shown, a retainer 4 is provided between the first groove 5 and the second groove 6, and the ball 3 is rotatably connected between the first groove 5 and the second groove 6 through the retainer 4; Figure 5For the third embodiment of the utility model, the difference with the first and second embodiments is that the cage 4 is added. The cage 4 can separate the balls 3, avoiding the interaction between the balls 3 to hinder the bearing operation. Preferably, the cage 4 is made of high-temperature-resistant steel or silicon nitride material, which matches the high-temperature-resistant performance of other parts of the bearing, further improving the overall high-temperature-resistant performance and stability of the bearing. It is worth noting that the bearing with the cage 4 is suitable for a working environment of 0-400 degrees, and the bearing without the cage 4 in the first and second embodiments should be used in a working environment of 400-1100 degrees.
[0030] The implementation principle of the utility model embodiment is:
[0031] The connecting shaft is connected in the expansion sleeve 7 inside the bearing inner ring 2, when the connecting shaft is heated and expanded, it will squeeze the ring body 8 along the radial direction, and then squeeze the protrusions 9 on the side wall of the ring body 8, the protrusions 9 will be deformed, and the deformation of the connecting shaft is offset by the deformation of the connecting shaft, so that the overall inner diameter size is unchanged, thereby preventing the bearing inner ring 2 from being expanded and cracked, and after the temperature drops, the connecting shaft will return to the original size, reducing the squeezing of the ring body 8, and the protrusions 9 will also return to the original shape.
[0032] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The various components mentioned in the utility model are common techniques in the existing field, which should be understood by the technicians in the industry. The utility model is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which all fall within the scope of the claimed utility model. The scope of protection of the utility model is defined by the appended claims and their equivalents.
Claims
1. A high-temperature resistant bearing capable of preventing cracking, comprising a bearing outer ring (1), a bearing inner ring (2) and a ball (3), a first groove (5) is formed on the inner side wall of the bearing outer ring (1), a second groove (6) is formed on the outer side wall of the bearing inner ring (2), the ball (3) is rolling connected between the first groove (5) and the second groove (6), and a ball loading notch is formed on the side wall of the bearing outer ring (1) and the bearing inner ring (2), characterized in that: The inner side wall of the bearing inner ring (2) is provided with an expansion sleeve (7) for offsetting deformation when the connecting shaft is heated and expanded. 2. A high temperature resistant bearing to prevent cracking as claimed in claim 1 wherein: The inner side wall of the bearing inner ring (2) is provided with a mounting groove (11), and the expansion sleeve (7) is embedded in the mounting groove (11).
3. A high temperature resistant bearing to prevent cracking as claimed in claim 2 wherein: The expansion sleeve (7) comprises a ring body (8) and a protrusion (9), and the side wall of the ring body (8) is formed with a plurality of deformable protrusions (9).
4. A high temperature resistant bearing to prevent cracking as claimed in claim 3 wherein: The side wall of the ring body (8) is provided with a broken groove (10), forming a non-closed ring structure.
5. A high temperature resistant bearing to prevent cracking as claimed in claim 4 wherein: The number of the protrusions (9) is N, and N≥2; the protrusions (9) are circumferentially distributed at equal intervals.
6. A high temperature resistant bearing to prevent cracking as claimed in claim 5 wherein: The shape of the protrusions (9) is any one of a rectangle, a rounded rectangle, a triangle, and a circle, and the edges thereof are rounded.
7. A high temperature resistant bearing that resists cracking as claimed in claim 1, wherein: The bearing outer ring (1), the bearing inner ring (2), and the ball (3) are all made of silicon nitride.
8. A high temperature resistant bearing that resists cracking as claimed in claim 4, wherein: A retainer (4) is arranged between the first channel (5) and the second channel (6), and the ball (3) is connected between the first channel (5) and the second channel (6) through the retainer (4).
9. A high temperature resistant bearing that resists cracking as claimed in claim 8, wherein: The retainer (4) is made of high-temperature-resistant steel or silicon nitride.