CN113820129A - Axial adjusting device and method for shafting - Google Patents
Axial adjusting device and method for shafting Download PDFInfo
- Publication number
- CN113820129A CN113820129A CN202110941382.8A CN202110941382A CN113820129A CN 113820129 A CN113820129 A CN 113820129A CN 202110941382 A CN202110941382 A CN 202110941382A CN 113820129 A CN113820129 A CN 113820129A
- Authority
- CN
- China
- Prior art keywords
- frame
- shafting
- bearing
- load
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000005299 abrasion Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/028—Acoustic or vibration analysis
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/02—Gearings; Transmission mechanisms
- G01M13/025—Test-benches with rotational drive means and loading means; Load or drive simulation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
- Sliding-Contact Bearings (AREA)
Abstract
The invention provides a shafting axial adjusting device and an adjusting method, wherein the shafting axial adjusting device comprises a first bearing (1) and a second bearing (7) which are respectively assembled in a first bearing hole and a second bearing hole of a frame (4); the upper shaft (3) is perpendicular to the load frame (6), fixedly connected and assembled in the first bearing hole; the lower shaft (8) is perpendicular to the load frame (6), fixedly connected and assembled in the second bearing hole; the adjusting pad (2) is sleeved on the upper shaft (3) and assembled between the upper shaft (3) and the first bearing (1); and the load (5) is fixedly connected with the load frame (6), and the load (5) can be detached and replaced. The shafting axial adjusting device avoids the problem that the axial clearance of the shafting is readjusted due to subsequent reworking of the platform caused by the problem of adjusting the burrs of the cushion, improves the production efficiency and saves the production cost.
Description
Technical Field
The invention relates to the technical field of axial adjustment of a stable platform frame, in particular to an axial adjustment device and an axial adjustment method for a shafting.
Background
In the product field that the axial clearance of the platform requires strict temperature and mechanical environment, the mechanical structure, particularly the rotating structure, has strict requirements on both the temperature and the mechanical environment. The shafting passes through the bearing and is connected with the frame, and conventional shafting is different with the frame material, and thermal expansion coefficient is just different, and the product height low temperature can produce expend with heat and contract with cold, and under the low temperature condition, the shafting all contracts with the frame, because thermal expansion coefficient is different, and the shrinkage is just different, for preventing shafting low temperature jamming, just need to leave suitable clearance during normal atmospheric temperature assembly.
Because part machining has the tolerance, in order to guarantee shafting axial clearance, need increase the adjustment between the shafting and fill up the adjustment and guarantee, conventional adjustment is filled up and is used line cutting processing, and the adjustment is filled up the edge and is inevitable to have the burr, and after the normal atmospheric temperature adjustment is qualified, through vibration test back, mutual friction between the adjustment pad, the burr is too big after polishing, leads to control accuracy to descend. Namely, in the prior art, the axial clearance of the platform is adjusted to be within a qualified range, and a new adjusting pad needs to be added after pre-vibration, so that the axial clearance of the platform continues to increase after the secondary vibration test.
If polish to adjusting the pad burr before experimental, perhaps disassemble the platform again after experimental and carry out the axial adjustment, consume the manpower very much.
Disclosure of Invention
In order to solve the technical problems, the invention provides an axial adjusting device and an axial adjusting method for a shaft system, which are used for solving the technical problem that an axial clearance is increased due to burr abrasion of an adjusting pad after a vibration test of a stable platform in the prior art.
According to a first aspect of the present invention, there is provided a shafting axial adjustment apparatus applied to a stable platform, the shafting axial adjustment apparatus comprising:
the frame is of a circumferential closed structure, and bearing holes are processed on the upper side and the lower side of the frame and used for fixing the first bearing and the second bearing;
the first bearing is assembled in a first bearing hole of the frame;
a second bearing fitted in the second bearing hole of the frame;
the load frame is of a circumferential closed structure, and mounting holes are processed on the upper side and the lower side of the load frame and used for fixing the upper shaft and the lower shaft; after the load frame is connected with the upper shaft and the lower shaft, the load frame can rotate relative to the frame through the first bearing and the second bearing;
the upper shaft is perpendicular to the load frame, fixedly connected and assembled in the first bearing hole;
the lower shaft is perpendicular to the load frame, fixedly connected and assembled in the second bearing hole; the central axis of the upper shaft, the central axis of the lower shaft and the central axis of the load frame are positioned on the same straight line of the same plane;
the adjusting pad is sleeved on the upper shaft and is assembled between the upper shaft and the first bearing;
and the load is fixedly connected with the load frame and can be detached and replaced.
According to a second aspect of the present invention, there is provided a shafting axial adjustment method, including the steps of:
step S201: adjusting the number of the adjusting pads based on the load assembled by the axial adjusting device of the shaft system, so that the axial clearance between the upper shaft and the lower shaft is larger than zero, and the axial clearance is minimum within the range of 0.05 mm; performing a vibration test on the stabilization platform;
step S202: calculating the axial clearance variation A of the stable platform,
a (a3 × L1-a1 × L4-a2 × L3-a4 × L2) (25-T1), wherein,
a1 is the thermal expansion coefficient of the upper shaft, a2 is the thermal expansion coefficient of the lower shaft, a3 is the thermal expansion coefficient of the frame, a4 is the thermal expansion coefficient of the load frame; l1 is the inner hole spacing of the frame in the direction parallel to the central axis of the upper shaft and the central axis of the lower shaft, the inner hole spacing being defined by the upper inner surface of the frame corresponding to the upper shaft and the lower inner surface of the frame corresponding to the lower shaft; l2 is a distance between a first mounting surface and a second mounting surface, the first mounting surface is a mounting surface of the upper shaft and the load frame, and the second mounting surface is a mounting surface of the lower shaft and the load frame; l3 is the distance between the second mounting surface and the lower inner surface of the frame; l4 is the distance between the first mounting surface and the upper inner surface of the frame;
step S203: the number of the adjusting pads is reduced, so that the axial clearance of the shafting is more than or equal to the value A within the range meeting the preset tolerance.
According to the scheme of the invention, after each shafting is mechanically assembled, the whole platform is subjected to pre-vibration work, the pre-vibration can eliminate the internal stress during part processing, the stable size of the platform in subsequent use and test is ensured, and the platform precision is effectively ensured. The scheme of the invention is that axial clearance of a shafting is adjusted before pre-vibration, and an adjusting pad is assembled during adjustment to ensure that the axial clearance is larger than zero and the axial clearance is minimum. In the vibration process, the adjusting pads rub against each other, burrs are polished, the shafting is readjusted after pre-vibration, redundant adjusting pads are taken out, the adjusting pads reserved in the platform are free of burrs, and the platform cannot change in axial clearance after a vibration test due to the fact that the adjusting pads have burrs. The method is used for axially adjusting the shafting of the platform, so that the processing difficulty of the adjusting pad can be greatly reduced, the grinding procedure before the assembling of the adjusting pad is reduced, the problem that the axial clearance of the shafting is readjusted by subsequent reworking of the platform due to the burr problem of the adjusting pad is avoided, the production efficiency is greatly improved, and the production cost is saved.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural diagram of an axial adjustment device for a shaft system according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for axially adjusting a shaft system according to an embodiment of the present invention.
Reference numerals: 1, a first bearing; 2, adjusting the cushion; 3, upper shaft; 4, a frame; 5, loading; 6, a load frame; 7, a second bearing; and 8, a lower shaft.
Detailed Description
First, a shafting axial adjustment device according to an embodiment of the present invention is described with reference to fig. 1, where the shafting axial adjustment device is applied to a stable platform. As shown in fig. 1, the axial adjusting device for shafting comprises:
the frame 4 is of a circumferential closed structure, and bearing holes are processed on the upper side and the lower side of the frame and used for fixing the first bearing 1 and the second bearing 7;
a first bearing 1 fitted in a first bearing hole of the frame 4;
a second bearing 7 fitted in a second bearing hole of the frame 4;
the load frame 6 is of a circumferential closed structure, and mounting holes are formed in the upper side and the lower side of the load frame and used for fixing the upper shaft 3 and the lower shaft 8; after the load frame 6 is connected with the upper shaft 3 and the lower shaft 8, the load frame can rotate relative to the frame 4 through the first bearing 1 and the second bearing 7;
the upper shaft 3 is perpendicular to the load frame 6, fixedly connected and assembled in the first bearing hole;
the lower shaft 8 is perpendicular to the load frame 6, fixedly connected and assembled in a second bearing hole; the central axis of the upper shaft 3, the central axis of the lower shaft 8 and the central axis of the load frame 6 are positioned on the same straight line of the same plane;
the adjusting pad 2 is sleeved on the upper shaft 3 and is assembled between the upper shaft 3 and the first bearing 1;
and the load 5 is fixedly connected with the load frame 6, and the load 5 can be detached and replaced.
Further, the upper shaft 3, the lower shaft 8, the frame 4, and the load frame 6 are made of materials having different thermal expansion coefficients.
Further, when the platform is used, the lowest temperature of the environment which can be borne by the platform is T1, and the normal temperature is T. In this example, the room temperature T is 25 ℃.
A shafting axial adjustment method according to an embodiment of the present invention is described with reference to fig. 2, where an adjustment target of the shafting axial adjustment method is the shafting axial adjustment device, and the method includes the following steps:
step S201: based on the load 5 assembled by the shafting axial adjusting device, the number of the adjusting pads 2 is adjusted, so that the axial clearance between the upper shaft 3 and the lower shaft 8 is larger than zero, and the axial clearance is minimum within the range of 0.05 mm; performing a vibration test on the stabilization platform;
the vibration test is pre-vibration, internal stress during part processing can be eliminated, the stable size of the platform during subsequent use and test is ensured, and the platform precision is effectively ensured.
Step S202: calculating the axial clearance variation A of the stable platform,
a (a3 × L1-a1 × L4-a2 × L3-a4 × L2) (25-T1), wherein,
a1 is the thermal expansion coefficient of the upper shaft 3, a2 is the thermal expansion coefficient of the lower shaft 8, a3 is the thermal expansion coefficient of the frame 4, a4 is the thermal expansion coefficient of the load frame 6; l1 is an inner hole pitch of the frame 4 in a direction parallel to the central axis of the upper shaft 3 and the central axis of the lower shaft 8, the inner hole pitch being defined by an upper inner surface of the frame 4 corresponding to the upper shaft 3 and a lower inner surface of the frame 4 corresponding to the lower shaft 8; l2 is the distance between a first mounting surface and a second mounting surface, the first mounting surface is the mounting surface of the upper shaft 3 and the load frame 6, the second mounting surface is the mounting surface of the lower shaft 8 and the load frame 6; l3 is the distance between the second mounting surface and the lower inner surface of the frame 4; l4 is the distance between the first mounting surface and the upper inner surface of the frame 4;
step S203: the number of the adjusting pads 2 is reduced, so that the axial clearance of the shafting is more than or equal to the value A within the range meeting the preset tolerance.
The preset tolerance range is determined by a tolerance band, the upper limit of the tolerance band is determined by control system parameters, and the lower limit of the tolerance band is a value A.
In this embodiment, the adjusting pad 2 assembled in the final state of the shafting is subjected to the initial vibration test, that is, the adjusting pad 2 is completely polished due to burrs caused by processing, and the platform control system precision is ensured because axial change caused by burr abrasion of the adjusting pad 2 is avoided in the following process.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (5)
1. The utility model provides a shafting axial adjusting device, its characterized in that, shafting axial adjusting device is applied to and stabilizes the platform, shafting axial adjusting device includes:
the frame (4) is of a circumferential closed structure, and bearing holes are processed on the upper side and the lower side of the frame and used for fixing the first bearing (1) and the second bearing (7);
a first bearing (1) fitted in a first bearing hole of the frame (4);
a second bearing (7) fitted in a second bearing hole of the frame (4);
the load frame (6) is of a circumferential closed structure, and mounting holes are formed in the upper side and the lower side of the load frame and used for fixing the upper shaft (3) and the lower shaft (8); the load frame (6) is connected with an upper shaft (3) and a lower shaft (8) and can rotate relative to the frame (4) through the first bearing (1) and the second bearing (7);
the upper shaft (3) is perpendicular to the load frame (6), fixedly connected and assembled in the first bearing hole;
the lower shaft (8) is perpendicular to the load frame (6), fixedly connected and assembled in the second bearing hole; the central axis of the upper shaft (3), the central axis of the lower shaft (8) and the central axis of the load frame (6) are positioned on the same straight line of the same plane;
the adjusting pad (2) is sleeved on the upper shaft (3) and assembled between the upper shaft (3) and the first bearing (1);
and the load (5) is fixedly connected with the load frame (6), and the load (5) can be detached and replaced.
2. The axial shafting adjustment device according to claim 1, wherein the upper shaft (3), the lower shaft (8), the frame (4) and the load frame (6) are made of materials with different thermal expansion coefficients.
3. The shafting axial adjustment device as claimed in claim 2, wherein the platform can withstand the lowest temperature of the environment when in use, which is T1.
4. A shafting axial adjustment apparatus as claimed in claim 3, wherein said platform is used at a room temperature of T.
5. A shafting axial adjustment method, an object of adjustment of the shafting axial adjustment method being the shafting axial adjustment apparatus according to any one of claims 1 to 4, the method comprising the steps of:
step S201: adjusting the number of the adjusting pads (2) based on the load (5) assembled by the shafting axial adjusting device, so that the axial clearance between the upper shaft (3) and the lower shaft (8) is greater than zero, and the axial clearance is minimum within the range of 0.05 mm; performing a vibration test on the stabilization platform;
step S202: calculating the axial clearance variation A of the stable platform,
a (a3 × L1-a1 × L4-a2 × L3-a4 × L2) (25-T1), wherein,
a1 is the thermal expansion coefficient of the upper shaft (3), a2 is the thermal expansion coefficient of the lower shaft (8), a3 is the thermal expansion coefficient of the frame (4), and a4 is the thermal expansion coefficient of the load frame (6); l1 is the inner hole spacing of the frame (4) in the direction parallel to the central axis of the upper shaft (3) and the central axis of the lower shaft (8), which is defined by the upper inner surface of the frame (4) corresponding to the upper shaft (3) and the lower inner surface of the frame (4) corresponding to the lower shaft (8); l2 is the distance between the first installation surface and the second installation surface, the first installation surface is the installation surface of the upper shaft (3) and the load frame (6), the second installation surface is the installation surface of the lower shaft (8) and the load frame (6); l3 is the distance between the second mounting surface and the lower inner surface of the frame (4); l4 is the distance between the first mounting surface and the upper inner surface of the frame (4);
step S203: the number of the adjusting pads (2) is reduced, so that the axial clearance of the shafting is more than or equal to the value A within the range meeting the preset tolerance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110941382.8A CN113820129B (en) | 2021-08-17 | 2021-08-17 | Shafting axial adjustment device and adjustment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110941382.8A CN113820129B (en) | 2021-08-17 | 2021-08-17 | Shafting axial adjustment device and adjustment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113820129A true CN113820129A (en) | 2021-12-21 |
| CN113820129B CN113820129B (en) | 2024-07-02 |
Family
ID=78923032
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110941382.8A Active CN113820129B (en) | 2021-08-17 | 2021-08-17 | Shafting axial adjustment device and adjustment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113820129B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04113330U (en) * | 1991-01-21 | 1992-10-02 | ジヤトコ株式会社 | preload adjustment shim |
| CN106567985A (en) * | 2016-11-18 | 2017-04-19 | 天津津航技术物理研究所 | High-precision airborne two-shaft scanning stabilization mechanism |
| CN109530594A (en) * | 2018-12-29 | 2019-03-29 | 武汉新威奇科技有限公司 | The driving screw axial clearance adjusting mechanism of fly press |
| CN110821966A (en) * | 2019-11-26 | 2020-02-21 | 成都国翼电子技术有限公司 | Axial clearance adjusting device |
| CN112324809A (en) * | 2020-11-25 | 2021-02-05 | 重庆齿轮箱有限责任公司 | Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing |
| CN112443636A (en) * | 2019-09-01 | 2021-03-05 | 九江精密测试技术研究所 | Wide-temperature-range high-precision shaft system structure |
| CN112664575A (en) * | 2020-12-07 | 2021-04-16 | 河北汉光重工有限责任公司 | Reliably-connected and adjustable bearing pre-tightening structure and assembling and adjusting method |
| CN112664577A (en) * | 2020-12-07 | 2021-04-16 | 河北汉光重工有限责任公司 | Stable platform bearing fixing structure and assembling and adjusting method |
-
2021
- 2021-08-17 CN CN202110941382.8A patent/CN113820129B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04113330U (en) * | 1991-01-21 | 1992-10-02 | ジヤトコ株式会社 | preload adjustment shim |
| CN106567985A (en) * | 2016-11-18 | 2017-04-19 | 天津津航技术物理研究所 | High-precision airborne two-shaft scanning stabilization mechanism |
| CN109530594A (en) * | 2018-12-29 | 2019-03-29 | 武汉新威奇科技有限公司 | The driving screw axial clearance adjusting mechanism of fly press |
| CN112443636A (en) * | 2019-09-01 | 2021-03-05 | 九江精密测试技术研究所 | Wide-temperature-range high-precision shaft system structure |
| CN110821966A (en) * | 2019-11-26 | 2020-02-21 | 成都国翼电子技术有限公司 | Axial clearance adjusting device |
| CN112324809A (en) * | 2020-11-25 | 2021-02-05 | 重庆齿轮箱有限责任公司 | Auxiliary device and method for adjusting axial clearance of paired spherical roller thrust bearing |
| CN112664575A (en) * | 2020-12-07 | 2021-04-16 | 河北汉光重工有限责任公司 | Reliably-connected and adjustable bearing pre-tightening structure and assembling and adjusting method |
| CN112664577A (en) * | 2020-12-07 | 2021-04-16 | 河北汉光重工有限责任公司 | Stable platform bearing fixing structure and assembling and adjusting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113820129B (en) | 2024-07-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5316393A (en) | Duplex rolling element bearing mounting for ensuring preload control | |
| US20090087316A1 (en) | Rotor blade, method for producing a rotor blade, and compressor with a rotor blade | |
| US20130093273A1 (en) | Rotary electric machine | |
| WO2006004965A2 (en) | Device and method for detachably connecting an impeller to a shaft | |
| US20160084301A1 (en) | Rotating machinery with adaptive bearing journals and methods of operating | |
| CN113820129A (en) | Axial adjusting device and method for shafting | |
| US20200392986A1 (en) | Bearing pad for tilting-pad bearing, tilting-pad bearing, and rotary machine | |
| GB2058284A (en) | Elastomeric bearings with dual stock layers | |
| JP7326512B2 (en) | Bearing for a wind turbine, wind turbine with bearing and method for manufacturing a bearing ring | |
| US20150016763A1 (en) | Segmented viscoelastic bushing for rotating electrical machines bearing | |
| JP5059225B1 (en) | Manufacturing method of seismic isolation device | |
| CN112664577B (en) | Stable platform bearing fixing structure and assembling and adjusting method | |
| CN110621895B (en) | Method for finishing bearing ring | |
| CN110081070A (en) | A kind of flexible thrust bearing | |
| CN210087825U (en) | Flexible thrust bearing | |
| CN114032378A (en) | Blade reshaping method | |
| CN114326013B (en) | Primary mirror assembly for tilt measurement camera | |
| JP5112120B2 (en) | Optical element manufacturing method and mold assembly for manufacturing the same | |
| KR20050003975A (en) | Compliant spacer | |
| CN214868588U (en) | Mounting structure capable of adjusting gear center distance | |
| CN212240212U (en) | Lead screw guiding mechanism is used in digit control machine tool processing | |
| CN211924533U (en) | Anti-drop radiator fan structure | |
| CN115949670A (en) | Elastic structure for axial compression of bearing | |
| JP2005325907A (en) | Angular ball bearing device | |
| JP2017001165A (en) | Design method of formed grinding tool, formed grinding tool, and manufacturing method of plate glass |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |