CN112664544A - Rotating shaft structure with temperature compensation function - Google Patents
Rotating shaft structure with temperature compensation function Download PDFInfo
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- CN112664544A CN112664544A CN202011414494.XA CN202011414494A CN112664544A CN 112664544 A CN112664544 A CN 112664544A CN 202011414494 A CN202011414494 A CN 202011414494A CN 112664544 A CN112664544 A CN 112664544A
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- rotating shaft
- bearing
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- ring
- temperature compensation
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Abstract
The invention discloses a rotating shaft structure with temperature compensation. According to the invention, by optimizing the structures and materials of the base, the rotating shaft and the bearing, the compensation ring is added between the rotating shaft and the bearing, and the sizes of the base, the bearing, the rotating shaft and the compensation ring and the linear expansion system meet a certain relation, under the condition of the same temperature change, the axial size of the base and the bearing after temperature change is equal to the axial size of the rotating shaft and the compensation ring after temperature change, the difference of the size of each component of the rotating shaft system along the axial direction is zero in the high and low full-temperature working range, the problem of clamping stagnation of the rotating shaft system is avoided, and the axial clearance between the rotating shaft and the bearing is ensured not to be enlarged at other temperatures, so that the rotating precision of the rotating shaft system is improved.
Description
Technical Field
The invention relates to the technical field of design of rotating shaft structures, in particular to a rotating shaft structure with temperature compensation.
Background
The typical rotating shaft system mainly comprises a base, a rotating shaft, a bearing pressing ring or a fastener and the like, wherein when the rotating shaft and the bearing work, due to the fact that linear expansion coefficients of materials of components of the rotating shaft system are different, the sizes of the components of the rotating shaft system are unequal along the axial variation under the high and low full-temperature working ranges, the axial gap between the rotating shaft and the bearing is increased or decreased along with the temperature variation, in order to prevent the rotating shaft system from being blocked or even dead, the axial gap between the rotating shaft and the bearing is usually adjusted, so that the blocking is not generated under the limit temperature under the high and low full-temperature working ranges, the axial gap between the rotating shaft and the bearing is increased at other temperatures, the axial displacement and the radial oscillation of the rotating shaft system are directly influenced by the axial gap between the rotating shaft and the bearing, and the rotating precision of.
Disclosure of Invention
In view of the above, the invention provides a rotating shaft structure with temperature compensation, which optimizes the structures and materials of a base, a rotating shaft and a bearing, adds a compensation ring between the rotating shaft and the bearing, and the sizes of the base, the bearing, the rotating shaft and the compensation ring and a linear expansion system satisfy a certain relation.
The invention relates to a rotating shaft structure with temperature compensation, which comprises: the device comprises a base, a bearing I, a bearing II, a rotating shaft and a compensating ring; wherein, the base has a big inner circle surface and a small inner circle surface, and the rotating shaft has a big outer circle surface and a small outer circle surface; the outer circle surface of the bearing I is installed in interference fit with the large inner circle surface of the base, and the inner circle surface of the bearing I is installed in clearance fit with the large outer circle surface of the rotating shaft; the outer circular surface of the bearing is in interference fit with the small inner circular surface of the base, and the inner circular surface of the bearing is in clearance fit with the small outer circular surface of the rotating shaft; the inner circle surface of the compensation ring is in clearance fit with the small outer circle surface of the rotating shaft, and two end surfaces of the compensation ring are respectively close to the end surface of the small outer circle surface of the rotating shaft and the end surface of the bearing II;
the sizes and linear expansion coefficients of the base, the first bearing, the rotating shaft and the compensating ring satisfy the following relations:
(L1×A1)+(L2×A2)-(L3×A3)-(L4×A4)＝0
wherein, L1 is the distance between the end surfaces of the two inner circular surfaces of the base, L2 is the distance between the two end surfaces of the bearing, L3 is the distance between the end surfaces of the two outer circular surfaces of the rotating shaft, and L4 is the distance between the two end surfaces of the compensating ring; a1, A2, A3 and A4 are the linear expansion coefficients of the base, the first bearing, the rotating shaft and the compensating ring respectively.
Preferably, an inner ring of the bearing is fixed on the rotating shaft through a screw.
Preferably, the base and the shaft may be made of the same or different materials. The base and the rotating shaft are made of non-ferrous metal alloy materials, preferably aluminum alloy or magnesium alloy.
Preferably, the materials of the first bearing and the compensating ring can be the same or different, and the bearing steel material is preferred.
Preferably, the base is made of steel or stainless steel, the first bearing is made of bearing steel, the rotating shaft is made of aluminum alloy, and the compensating ring is made of titanium alloy.
Has the advantages that:
(1) the structure and the material of the base, the rotating shaft and the bearing are optimized, the compensation ring is added between the rotating shaft and the bearing, and the difference value of the variation of the sizes of all the components of the rotating shaft system along the axial direction is zero in the working range of high and low full temperatures.
(2) The problem of clamping stagnation of the rotary shaft system is avoided, and meanwhile, the axial clearance between the rotary shaft and the bearing is not increased at other temperatures, so that the rotary precision of the rotary shaft system is improved.
Drawings
FIG. 1 is a schematic view of a spindle structure with temperature compensation according to the present invention.
The device comprises a base 1, a bearing I2, a bearing II 3, a rotating shaft 4, a screw 5 and a compensating ring 6.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
The invention provides a rotating shaft structure with temperature compensation, as shown in figure 1, comprising a base 1, a bearing I2, a bearing II 3, a rotating shaft 4, a screw 5 and a compensation ring 6, wherein the base 1 is provided with two large inner circular surfaces, one small inner circular surface, a large inner circular surface and a small inner circular surface which are coaxial, the diameter of the large inner circular surface is larger than that of the small inner circular surface, the end surface of the large inner circular surface of the base 1 is parallel to the end surface of the small inner circular surface and has a distance of L1, the outer circular surface of the bearing I2 is arranged in interference fit with the large inner circular surface of the base 1, one side end surface of the bearing I2 is abutted against the end surface of the large inner circular surface of the base 1, the outer circular surface of the bearing II 3 is arranged in interference fit with the small inner circular surface of the base 1, one side end surface of the bearing II 3 is abutted against the end surface of the small inner circular surface of the base 1, the rotating shaft 4 is provided with two large outer circular surfaces, the large outer circular, the end face of the large outer circular face of the rotating shaft 4 is parallel to the end face of the small outer circular face and is in clearance fit with the end face of the small outer circular face of the rotating shaft 4, the inner ring of the first bearing 2 is fixed on the rotating shaft 4 through a screw 5, the end face of the other side of the first bearing 2 is close to the end face of the large outer circular face of the rotating shaft 4, the end faces of the two sides of the first bearing 2 are parallel to each other and are in clearance fit with the end face of the small outer circular face of the rotating shaft 4, the end face of the inner ring of the compensation ring 6 is in clearance fit with the end face of the small outer circular face of the rotating shaft 4, the end face of the other side of the compensation ring 6 is close to the end face of the second bearing 3, the end faces of the two sides of the compensation ring 6 are parallel to each other and are in clearance fit with.
The linear expansion coefficient of the base 1 is A1, the linear expansion coefficient of the bearing I2 is A2, the linear expansion coefficient of the rotating shaft 4 is A3, and the linear expansion coefficient of the compensating ring 6 is A4; the sizes and linear expansion coefficients of the base 1, the first bearing 2, the rotating shaft 4 and the compensating ring 6 satisfy the following relation:
(L1×A1)+(L2×A2)-(L3×A3)-(L4×A4)＝0
the base and the rotating shaft can be made of the same or different materials, and can be made of non-ferrous metal alloy materials, preferably aluminum alloy or magnesium alloy.
The materials of the first bearing and the compensating ring can be the same or different, and the bearing steel material is preferred.
In this embodiment, the base is made of steel or stainless steel, the first bearing is made of bearing steel, the rotating shaft is made of aluminum alloy, and the compensating ring is made of titanium alloy.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A rotating shaft structure with temperature compensation is characterized by comprising: the device comprises a base (1), a first bearing (2), a second bearing (3), a rotating shaft (4) and a compensating ring (6); wherein, the base (1) is provided with a big inner circle surface and a small inner circle surface, and the rotating shaft (4) is provided with a big outer circle surface and a small outer circle surface; the outer circular surface of the bearing I (2) is installed in interference fit with the large inner circular surface of the base (1), and the inner circular surface of the bearing I (2) is installed in clearance fit with the large outer circular surface of the rotating shaft (4); the outer circle surface of the second bearing (3) is in interference fit with the small inner circle surface of the base (1), and the inner circle surface of the second bearing (3) is in clearance fit with the small outer circle surface of the rotating shaft (4); the inner circular surface of the compensation ring (6) is in clearance fit with the small outer circular surface of the rotating shaft (4), and two end surfaces of the compensation ring (6) are respectively close to the end surface of the small outer circular surface of the rotating shaft (4) and the end surface of the bearing II (3);
the sizes and the linear expansion coefficients of the base (1), the first bearing (2), the rotating shaft (4) and the compensating ring (6) satisfy the following relations:
(L1×A1)+(L2×A2)-(L3×A3)-(L4×A4)＝0
wherein L1 is the distance between the end surfaces of the two inner circular surfaces of the base (1), L2 is the distance between the two end surfaces of the bearing I (2), L3 is the distance between the end surfaces of the two outer circular surfaces of the rotating shaft (4), and L4 is the distance between the two end surfaces of the compensating ring (6); a1, A2, A3 and A4 are the linear expansion coefficients of the base (1), the bearing I (2), the rotating shaft (4) and the compensating ring (6), respectively.
2. Temperature-compensated rotor shaft arrangement according to claim 1, characterized in that the inner ring of the first bearing (2) is fixed to the rotor shaft (4) by means of screws (5).
3. Spindle construction with temperature compensation according to claim 1, characterized in that the base (1) and the spindle (4) may or may not be of the same material.
4. A spindle construction with temperature compensation according to claim 3, characterized in that the base (1) and the spindle (4) are made of non-ferrous metal alloy.
5. The spindle structure with temperature compensation according to claim 4, characterized in that the material of the base (1) and the spindle (4) is aluminum alloy or magnesium alloy.
6. A shaft structure with temperature compensation according to claim 1, characterized in that the materials of the bearing (2) and the compensating ring (6) may be the same or different.
7. A rotating shaft structure with temperature compensation according to claim 6, characterized in that the bearing I (2) and the compensation ring (6) are made of bearing steel material.
8. The rotating shaft structure with temperature compensation according to claim 1, wherein the base (1) is made of steel or stainless steel material, the bearing I (2) is made of bearing steel material, the rotating shaft (4) is made of aluminum alloy material, and the compensation ring (6) is made of titanium alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414494.XA CN112664544B (en) | 2020-12-07 | 2020-12-07 | Rotating shaft structure with temperature compensation function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011414494.XA CN112664544B (en) | 2020-12-07 | 2020-12-07 | Rotating shaft structure with temperature compensation function |
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| Publication Number | Publication Date |
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| CN112664544A true CN112664544A (en) | 2021-04-16 |
| CN112664544B CN112664544B (en) | 2023-03-17 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202011414494.XA Active CN112664544B (en) | 2020-12-07 | 2020-12-07 | Rotating shaft structure with temperature compensation function |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201818536U (en) * | 2010-09-25 | 2011-05-04 | 太仓顺达磁力泵科技有限公司 | High-temperature resistant sliding bearing of magnetic drive pump and clearance compensation structure thereof |
| CN203964836U (en) * | 2014-05-29 | 2014-11-26 | 北京南口轨道交通机械有限责任公司 | Bearing axial play measurement mechanism |
| CN105135109A (en) * | 2015-07-17 | 2015-12-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Swivel joint |
| CN208736662U (en) * | 2018-08-30 | 2019-04-12 | 华中科技大学 | A kind of rotatable shaft that complying with end deflection deformation is to bearing |
| CN109667909A (en) * | 2018-12-06 | 2019-04-23 | 江苏科技大学 | A kind of short cylinder harmonic speed reducer with clearance compensation function |
| CN214425075U (en) * | 2020-11-30 | 2021-10-19 | 台邦电机工业集团有限公司 | Shell structure and flexible compensation type planetary gear speed reducer |
-
2020
- 2020-12-07 CN CN202011414494.XA patent/CN112664544B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201818536U (en) * | 2010-09-25 | 2011-05-04 | 太仓顺达磁力泵科技有限公司 | High-temperature resistant sliding bearing of magnetic drive pump and clearance compensation structure thereof |
| CN203964836U (en) * | 2014-05-29 | 2014-11-26 | 北京南口轨道交通机械有限责任公司 | Bearing axial play measurement mechanism |
| CN105135109A (en) * | 2015-07-17 | 2015-12-09 | 南车戚墅堰机车车辆工艺研究所有限公司 | Swivel joint |
| CN208736662U (en) * | 2018-08-30 | 2019-04-12 | 华中科技大学 | A kind of rotatable shaft that complying with end deflection deformation is to bearing |
| CN109667909A (en) * | 2018-12-06 | 2019-04-23 | 江苏科技大学 | A kind of short cylinder harmonic speed reducer with clearance compensation function |
| CN214425075U (en) * | 2020-11-30 | 2021-10-19 | 台邦电机工业集团有限公司 | Shell structure and flexible compensation type planetary gear speed reducer |
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|---|---|
| CN112664544B (en) | 2023-03-17 |
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