CN213870770U - Rotary shaft system with floating shaft sleeve - Google Patents
Rotary shaft system with floating shaft sleeve Download PDFInfo
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- CN213870770U CN213870770U CN202022891410.3U CN202022891410U CN213870770U CN 213870770 U CN213870770 U CN 213870770U CN 202022891410 U CN202022891410 U CN 202022891410U CN 213870770 U CN213870770 U CN 213870770U
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- floating
- sleeve
- rotary shaft
- shaft
- thrust
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Abstract
The utility model provides a gyration shafting with axle sleeve floats, be in including axis of rotation, setting the thrust plate, the cover of axis of rotation one end are established the outside axle sleeve that floats of axis of rotation, along the axial setting and be in the axle sleeve outside of floating and encircle cushion, thrust backing ring, dead axle that the axle sleeve that floats set up. The utility model discloses a gyration shafting with axle sleeve floats can increase axial rigidity under the condition that does not increase the size, and then overcomes the shortcoming that air bearing rigidity is low, has enlarged air bearing's application scene, and simple structure, easily equipment, low cost.
Description
Technical Field
The utility model relates to a gyration shafting with axle sleeve floats.
Background
The aerostatic bearing is widely applied to precision machining equipment and detection occasions because the aerostatic bearing has no friction and no pollution and can realize high-speed motion. However, due to the compressibility of the gas, the air bearing has low rigidity and weak external disturbance resistance, thereby affecting the use performance of the air bearing in ultra-high precision occasions.
The existing air bearing is low in rigidity and limited in application scene, and the scheme of increasing the size of an axial thrust plate is often adopted for improving the axial rigidity, so that the problems of large rotary inertia, difficulty in control, difficulty in realizing high rotating speed and the like are caused.
In view of the above, there is a need to improve the conventional rotating shaft system to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a gyration shafting with axle sleeve floats to solve.
In order to achieve the above object, the present invention provides a rotary shafting with floating shaft sleeves, the rotary shafting with floating shaft sleeves comprises a rotating shaft, a thrust plate disposed at one end of the rotating shaft, a floating shaft sleeve sleeved outside the rotating shaft, a cushion block and a thrust backing ring disposed axially outside the floating shaft sleeve and surrounding the floating shaft sleeve, the rotating shaft comprises a shaft body and a base disposed at one side of the shaft body away from the thrust plate, the floating shaft sleeve is sleeved on the shaft body, the floating shaft sleeve comprises a first floating part close to the shaft body and a second floating part extending from the first floating part towards the radial direction of the shaft body, the first floating part is spaced from the thrust plate, the base and the shaft body, the cushion block is spaced from the second floating part, and the number of the thrust backing ring is two, set up respectively the upper portion and the lower part of the unsteady portion of second, the thrust backing ring include with the cushion support the first part of holding, set up and be in the unsteady portion of second with thrust plate or second part between the base, the second part with the unsteady portion of second thrust plate the equal interval between the base sets up, set up along the air inlet of radial setting on the cushion, set up along the gas outlet of radial setting on the thrust backing ring, the air inlet with the gas outlet is linked together, the blow vent has been seted up on the unsteady axle sleeve, the blow vent runs through first unsteady portion and the unsteady portion of second.
As a further improvement of the present invention, the second floating portion is the same in height as the center of the pad.
As a further improvement of the present invention, the second portion includes a throttling portion extending from a side close to the first floating portion toward the second floating portion, the throttling portion being spaced apart from the second floating portion to form a first throttling gap.
As a further improvement of the present invention, the second portion and the thrust plate reaches the interval sets up between the base, and the interval distance is less than the first portion of floating with the thrust plate reaches clearance between the base is in order to form the second throttle clearance.
As a further improvement of the present invention, the air inlet is communicated with the air outlet through a second throttling gap.
As a further improvement of the present invention, the thrust backing ring is provided with a seal ring between the first floating portions, the seal ring is disposed on the gas outlet, and the gas outlet is kept away from one side of the second floating portion.
As a further improvement of the utility model, the junction of the first floating part and the second floating part is provided with a processing chamfer.
As a further improvement of the present invention, the base and the thrust plate have the same diameter.
As a further improvement, the rotary shaft system with the floating shaft sleeve comprises a fixed shaft arranged at the middle part, and the rotary shaft winds the fixed shaft.
As a further improvement of the present invention, the thrust plate is connected to the shaft body through a screw fixation.
The utility model has the advantages that: the utility model discloses a gyration shafting with axle sleeve floats can increase axial rigidity under the condition that does not increase the size, and then overcomes the shortcoming that air bearing rigidity is low, has enlarged air bearing's application scene, and simple structure, easily equipment, low cost.
Drawings
FIG. 1 is a perspective view of a rotary shaft system having floating bushings in accordance with the present invention;
fig. 2 is a schematic cross-sectional view of a rotary shaft system with a floating shaft sleeve according to the present invention;
FIG. 3 is an enlarged schematic view of region A of FIG. 2;
fig. 4 is an enlarged structural view of a region B in fig. 2.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 to 4, the utility model discloses a rotary shaft system 100 with floating shaft sleeve includes axis of rotation 1, sets up the thrust plate 2, the cover of 1 one end of axis of rotation are established the outside floating shaft sleeve 3 of axis of rotation 1, along the axial setting are in the floating shaft sleeve 3 outside and encircle the cushion 4, the thrust backing ring 5, the dead axle 6 that floating shaft sleeve 3 set up.
The rotating shaft 1 comprises a shaft body 11 and a base 12 arranged on one side of the shaft body 11 far away from the thrust plate 2.
The thrust plate 2 and the shaft body 11 are fixedly connected through a screw 7, the diameter of the base 12 is the same as that of the thrust plate 2, and the diameter of the shaft body 11 is smaller than that of the thrust plate 2 and the base 12.
In other embodiments, the diameter of the thrust plate 2 may be smaller than the diameter of the base 12, but the diameters of the thrust plate 2 and the base 12 should be larger than the diameter of the shaft body 11, so as to facilitate installation of the floating shaft sleeve 3.
The rotating shaft 1 rotates around the fixed shaft 6, and specifically, the fixed shaft 6 penetrates through the rotating shaft 1 and the thrust plate 2 in the axial direction, so that the rotating shaft 1 can rotate around the fixed shaft 6.
The floating shaft sleeve 3 is sleeved on the shaft body 11. The floating sleeve 3 includes a first floating portion 31 near the shaft body 11, and a second floating portion 32 extending from the first floating portion 31 toward the radial direction of the shaft body 11, the second floating portion 32 is disposed in the middle of the first floating portion 31, and the first floating portion 31 is spaced apart from the thrust plate 2, the base 12, and the shaft body 11. The floating sleeve 3 is provided with an air vent 33, and the air vent 33 penetrates through the first floating part 31 and the second floating part 32. The junction of the first floating portion 31 and the second floating portion 32 is provided with a processing chamfer 34 to make the floating bushing 3 easier to process.
The distance between the first floating portion 31 and the thrust plate 2 is set to h0, and the distance between the first floating portion and the base 12 is set to h 3.
The height of the cushion block 4 in the axial direction is higher than that of the second floating portion 32, and the cushion block and the second floating portion 32 are arranged at intervals. The second floating portion 32 and the center of the spacer 4 have the same height such that the upper end of the spacer 4 is higher than the second floating portion 32 and the lower end is lower than the second floating portion 32.
The cushion block 4 is provided with an air inlet 41 arranged along the radial direction. The air inlet 41 extends radially through the spacer 4 for the entry of air.
The number of the thrust washers 5 is two, and the thrust washers 5 are respectively arranged on the upper portion and the lower portion of the second floating portion 32, each thrust washer 5 comprises a first portion 51 abutted against the corresponding cushion block 4, and a second portion 52 arranged between the second floating portion 32 and the thrust plate 2 or the base 12, and the second portion 52 and the second floating portion 32, the thrust plate 2 and the base 12 are arranged at equal intervals. The thrust backing ring 5 is provided with an air outlet 53 arranged along the radial direction.
The second portion 52 includes a throttling portion 54 extending from a side close to the first floating portion 31 toward the second floating portion 32, and the throttling portion 54 is spaced apart from the second floating portion 32 to form a first throttling gap. The distance between the side of the second portion 52 away from the first floating portion 31 and the upper side of the second floating portion 32 is set to h1, the first throttling gap at the upper side is set to h11, the distance between the side of the second portion 52 away from the first floating portion 31 and the lower side of the second floating portion 32 is set to h2, and the first throttling gap at the lower side is set to h 21.
The second part 52 is spaced from the thrust plate 2 and the base 12 by a distance smaller than a gap between the first floating portion 31 and the thrust plate 2 and the base 12 to form a second throttling gap. The upper second throttle gap is set to h01, and the lower second throttle gap is set to h 31.
The air inlet 41 and the air outlet 53 communicate. Further, the air inlet 41 communicates with the air outlet 53 through a second throttle gap.
Through setting up first throttle clearance and second throttle clearance to make the gyration shafting 100 with floating sleeve easily processes, and stability is better.
A sealing ring 8 is arranged between the thrust backing ring 5 and the first floating part 31, and the sealing ring 8 is arranged on one side of the air outlet 53 far away from the second floating part 32.
The air flows as follows: air enters from the air inlet 41, and a part of the air passes through a gap between the cushion block 4 and the second floating part 32, passes through h1 and h11 from the upper part, passes through h2 and h21 from the lower part, passes through a gap between the second part 52 and the first floating part 31, enters the air outlet 53 and is finally discharged; the other part of the air enters the air vent 33, passes through the gap between the first floating portion 31 and the shaft body 11, the upper air passes through h0 and h01 in sequence and is then discharged, and the lower air passes through h3 and h31 in sequence and is then discharged.
The following effects can be achieved: when the rotating shaft system 100 with the floating shaft sleeve receives a downward load, the thrust plate 2 and the rotating shaft 1 move downwards for a certain distance, at this time, h01 and h0 become small, and corresponding air film forces, F01 and F0 become large; since F0 becomes larger, floating bushing 3 will move downward at this time, resulting in larger h1 and h11 and smaller h2 and h22, h3 and h 33; as h33 becomes smaller, the force F33 experienced by floating sleeve 3 will now increase, moving floating sleeve 3 up, causing h0 to decrease further and F0 to increase further until F0 can balance the external load. The displacement of the floating sleeve 3 can be completely balanced with the external load through reasonable design, and at the moment, h01 is hardly changed, which means that the main shaft has infinite rigidity in the axial direction.
Additionally the utility model discloses a gyration shafting 100 with axle sleeve that floats installs simply, provides the axis of rotation 1 of wearing dead axle 6, puts down thrust plate 2 of below, the thrust plate 2 of axle sleeve 3, cushion 4, top that floats in proper order, then passes through screw 7 with thrust plate 2 and axis of rotation 1 fixed, and processing is accomplished promptly, and it is very convenient to install.
The utility model discloses a gyration shafting 100 with axle sleeve floats can increase axial rigidity under the condition that does not increase the size, and then overcomes the shortcoming that air bearing rigidity is low, has enlarged air bearing's application scene, and simple structure, easily equipment, low cost.
The above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A rotary shaft system with a floating shaft sleeve is characterized in that: the rotary shafting with the floating shaft sleeve comprises a rotary shaft, a thrust plate and a thrust backing ring, wherein the thrust plate and the thrust backing ring are arranged at one end of the rotary shaft, the floating shaft sleeve is arranged outside the rotary shaft and is arranged along the axial direction, the floating shaft sleeve is arranged outside the floating shaft sleeve and surrounds the cushion block and the thrust backing ring, the rotary shaft comprises a shaft body and a base arranged on one side of the thrust plate, the floating shaft sleeve is arranged on the shaft body, the floating shaft sleeve comprises a first floating part close to the shaft body and a second floating part extending towards the radial direction of the shaft body from the first floating part, the first floating part and the thrust backing ring are arranged at intervals, the cushion block and the second floating part are arranged at intervals, the number of the thrust backing rings is two and are respectively arranged at the upper part and the lower part of the second floating part, and the thrust backing ring comprises a first part, a second part and a second part, which are abutted to the cushion block, The second part is arranged between the second floating part and the thrust plate or the second part between the bases, the second part is arranged at intervals between the second floating part and the thrust plate and between the bases, the cushion block is provided with an air inlet which is arranged along the radial direction, the thrust backing ring is provided with an air outlet which is arranged along the radial direction, the air inlet is communicated with the air outlet, the floating shaft sleeve is provided with an air vent, and the air vent penetrates through the first floating part and the second floating part.
2. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the second floating portion and the center of the pad block have the same height.
3. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the second portion includes a throttling portion extending from a side close to the first floating portion toward the second floating portion, and the throttling portion is spaced apart from the second floating portion to form a first throttling gap.
4. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the second part is arranged with the thrust plate and the base at intervals, and the interval distance is smaller than the gap between the first floating part and the thrust plate and the base to form a second throttling gap.
5. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the air inlet is communicated with the air outlet through a second throttling gap.
6. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: and a sealing ring is arranged between the thrust backing ring and the first floating part, and the sealing ring is arranged on one side of the air outlet, which is far away from the second floating part.
7. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: and a processing chamfer is arranged at the joint of the first floating part and the second floating part.
8. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the diameters of the base and the thrust plate are the same.
9. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the rotary shaft system with the floating shaft sleeve comprises a fixed shaft arranged in the middle, and the rotary shaft rotates around the fixed shaft.
10. The rotary shaft system with floating sleeve as claimed in claim 1, wherein: the thrust plate is fixedly connected with the shaft body through screws.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022891410.3U CN213870770U (en) | 2020-12-03 | 2020-12-03 | Rotary shaft system with floating shaft sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022891410.3U CN213870770U (en) | 2020-12-03 | 2020-12-03 | Rotary shaft system with floating shaft sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213870770U true CN213870770U (en) | 2021-08-03 |
Family
ID=77041708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022891410.3U Active CN213870770U (en) | 2020-12-03 | 2020-12-03 | Rotary shaft system with floating shaft sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213870770U (en) |
-
2020
- 2020-12-03 CN CN202022891410.3U patent/CN213870770U/en active Active
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