CN113389804B - Eccentric roller assembly bearing rotation structure and adjusting method thereof - Google Patents
Eccentric roller assembly bearing rotation structure and adjusting method thereof Download PDFInfo
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- CN113389804B CN113389804B CN202110427517.9A CN202110427517A CN113389804B CN 113389804 B CN113389804 B CN 113389804B CN 202110427517 A CN202110427517 A CN 202110427517A CN 113389804 B CN113389804 B CN 113389804B
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- bearing
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- eccentric roller
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C13/00—Rolls, drums, discs, or the like; Bearings or mountings therefor
- F16C13/02—Bearings
- F16C13/022—Bearings supporting a hollow roll mantle rotating with respect to a yoke or axle
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Support Of The Bearing (AREA)
Abstract
The invention belongs to the technical field of machinery, and relates to a supporting and rotating structure of an eccentric roller assembly and an adjusting method thereof. The structure includes: the eccentric roller mounting structure comprises a mounting frame (12) and a plurality of eccentric roller assemblies (15), wherein the eccentric roller assemblies (15) are fixed on the mounting frame (12) through eccentric shafts, and the eccentric roller assemblies (15) are uniformly arranged on a certain circumference of the mounting frame (12). According to the invention, the slewing bearing is completed through the plurality of eccentric roller assemblies, so that the diameter of the slewing body which can be supported by the eccentric roller assemblies and the mounting frame is far larger than that of the slewing body which can be supported by the integrated bearing, and the limitation on the diameter size of the slewing part in design is removed.
Description
Technical Field
The invention belongs to the technical field of machinery, and relates to a supporting and rotating structure of an eccentric roller assembly and an adjusting method thereof.
Background
In the aspect of supporting the rotation of a rotating member, the bearing is widely applied to large rotating devices such as hoisting, excavating, building, ports, ships, high-precision radars, missile launching and the like. Meanwhile, the slewing bearing with various special structures can be designed, developed and produced according to the specific requirements of users.
At present, the maximum integral bearing diameter which can be manufactured is 9.5m, and the maximum split bearing diameter is 12.4m. The large bearing has the advantages of extremely high processing difficulty, difficulty in ensuring precision and high price, and with the progress of industry, various industries put forward greater requirements on the diameter of a rotating part, but due to the limitation of the size of the bearing, the design and the manufacture of a larger rotating structure are difficult to realize. Under such circumstances, a new method is needed to support a revolving structure with a larger diameter, which is not only required to support a revolving member with a large diameter, but also required to bear a larger load and ensure the requirement on the revolving precision.
Disclosure of Invention
The purpose of the invention is as follows: the eccentric roller assembly supporting rotary structure and the adjusting method thereof are provided to support a rotary member with a large-size diameter and bear a large load.
The technical scheme is as follows:
in a first aspect, there is provided an eccentric roller assembly bearing swivel structure, comprising: a mounting frame 12 and a plurality of eccentric roller assemblies 15, the plurality of eccentric roller assemblies 15 being fixed to the mounting frame 12 by an eccentric shaft and the plurality of eccentric roller assemblies 15 being uniformly arranged on a certain circumference of the mounting frame 12.
Further, the plurality of eccentric roller assemblies 15 includes: gyro wheel 9, bearing 8, eccentric shaft 10, the outer gland 2 of bearing, gland 3 in the bearing, wherein, the outer gland 2 of bearing, gland 3 sets up respectively in the bearing 8 inboard and outside and compresses tightly bearing 8, the inboard of bearing 8 leans on tightly on eccentric shaft 10's shaft shoulder and gyro wheel 9, gyro wheel 9 leans on bearing 8 to support, gland 3 fixed connection in eccentric shaft 10 one end and the bearing, gyro wheel 9 sets up in the outer gland 2 outside of bearing and with the outer gland 2 fixed connection of bearing, the eccentric shaft 10 other end is connected with mounting bracket 12.
Further, the plurality of eccentric roller assemblies 15 further include a shaft retainer ring 5, and the shaft retainer ring 5 is arranged outside the inner ring of the bearing 8 and in surface contact with the bearing inner gland 3.
Further, the plurality of eccentric roller assemblies 15 further include a hole retainer 6, and the hole retainer 6 is disposed outside the outer ring of the bearing 8 for adjusting the clearance of the bearing 8.
Further, an outward annular boss is arranged at the middle section of the eccentric shaft 10, the front section and the rear section of the eccentric shaft 10 are shafts with preset offset, and an adjusting pad 11 is arranged between the side surface of the annular boss and the mounting frame 12.
Further, the eccentric roller assembly 15 is lockingly connected with the mounting frame 12 through a hexagonal nut 14.
Further, the outer ring of the roller 9 is provided with a V-shaped ring groove, and the V-shaped ring groove of the roller 9 is connected with the bulge of the rotating member in a matching manner.
In a second aspect, there is provided a method of adjusting a bearing revolution structure of an eccentric roller assembly, comprising: fixing a first dial indicator 21 and a second dial indicator 22 on the mounting frame 12, enabling the position vector directions of the first dial indicator 21 and the second dial indicator 22 to pass through the rotation center of the workpiece, enabling the distance between a contact and the rotation center to be equal to the rotation radius, enabling an included angle between the connecting line of the position vector directions of the first dial indicator 21 and the second dial indicator 22 and the rotation center to be 90 degrees, and enabling the contact to be perpendicular to the upper surface of the rotating part;
rotating the rotating member, and observing the pointer jump of the first dial indicator 21 and the second dial indicator 22;
the eccentric roller assembly 15 is adjusted according to the pointer jumping conditions of the first dial indicator 21 and the second dial indicator 22.
Has the beneficial effects that:
according to the invention, the slewing bearing is completed through the plurality of eccentric roller assemblies, so that the diameter of the slewing body which can be supported by the eccentric roller assemblies and the mounting frame is far larger than that of the slewing body which can be supported by the integrated bearing, and the limitation on the diameter size of the slewing part in design is removed.
Drawings
FIG. 1 is a structural view of an eccentric wheel assembly according to an embodiment of the present invention;
FIG. 2 is a view of the mounting location of the eccentric wheel assembly to the rotating member and mounting bracket according to one embodiment of the present invention;
FIG. 3 is a schematic view of the mounting of a plurality of eccentric wheel assemblies on a mounting bracket according to one embodiment of the present invention;
FIG. 4 is an enlarged cross-sectional view taken along the longitudinal diametrical direction of FIG. 3;
FIG. 5 is a schematic view of centering an eccentric assembly;
FIG. 6 is a left side view of an eccentric wheel assembly according to another embodiment of the present invention;
fig. 7 isbase:Sub>A sectional view taken alongbase:Sub>A-base:Sub>A of fig. 6.
The device comprises a rotating part 1, a bearing outer gland 2, a bearing inner gland 3, a slotted half-countersunk head screw 4, a retainer ring for 5 shafts, a retainer ring for 6 holes, a slotted countersunk head screw 7, a double-row angular contact bearing 8, a roller 9, an eccentric shaft 10, an adjusting pad 11, a mounting rack 12, a spring pad 13, a hexagonal nut 14 2, an eccentric roller assembly 15, a bearing inner retainer ring 16, a bearing outer retainer ring 17, a first dial indicator 21, a second dial indicator 22, a first schematic eccentric roller assembly 23, a second schematic eccentric roller assembly 24, a third schematic eccentric roller assembly 25 and a fourth schematic eccentric roller assembly 26.
Detailed Description
In order to relieve the limitation on the diameter size of a rotating part during design, or the conditions that the installation space of a bearing is limited, the use of a bearing is difficult to realize and the like, the invention provides an eccentric roller assembly bearing rotating structure for realizing the support of a large-diameter rotating structure, and the eccentric roller assembly bearing rotating structure has the characteristics of strong load capacity and high precision.
The eccentric roller assemblies are arranged on a supporting frame (the supporting frame is designed according to the size of the rotary member) with the size matched with the rotary member, so that the eccentric roller assemblies are uniformly supported on the inner circumference of the rotary member, and because the eccentric shafts of the roller assemblies and the rollers are not concentric, for example, because the machining and mounting processes possibly have deviation, the rotary center of the rotary member can be adjusted by adjusting the eccentric shafts, and finally, the position of the rotary center is checked by using a dial indicator for fine adjustment. The requirement of large load can be met by adjusting the number and the size of the eccentric wheel assemblies or adopting a method of supporting in parallel in multiple rows.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
In the field of wind power generation, in order to improve the power and increase the power generation amount of wind power generation, the size of the internal structure of a fan is continuously increased, the size and the load of a bearing are gradually increased, and the requirement on position accuracy is high. This places very high technical demands on the bearing. The general application range of the super-huge type slewing bearing is about 1000mm to 3500mm, and the bearing of the wind power generation greatly exceeds the size. The eccentric roller assembly can meet the requirements of the fan on the size, load and precision of the slewing bearing structure.
Referring to fig. 4, the eccentric roller assembly supporting swivel structure according to an embodiment of the present invention includes: the eccentric wheel mounting structure comprises a mounting frame 12 and a plurality of eccentric wheel assemblies 15, wherein the plurality of eccentric wheel assemblies 15 are fixed on the mounting frame 12 through eccentric shafts, and the plurality of eccentric wheel assemblies 15 are uniformly arranged on a certain circumference of the mounting frame 12.
As shown in fig. 1 and 2, the eccentric roller assembly 15 comprises a bearing outer gland 2, a bearing inner gland 3, a slotted semi-countersunk head screw 4, a shaft retainer ring 5, a hole retainer ring 6, a slotted countersunk head screw 7, a double-row angular contact bearing 8, a roller 9, an eccentric shaft 10, an adjusting pad 11, an elastic pad 13 and a 2-type hexagon nut 14. Gland 2 outside the bearing, gland 3 sets up respectively in the bearing 8 inboard and outside and compresses tightly bearing 8, 3 fixed connection of gland in eccentric shaft 10 one end and the bearing, gyro wheel 9 sets up in the bearing 2 outsides of gland and with bearing 2 fixed connection, the eccentric shaft 10 other end is connected with mounting bracket 12, the inboard of bearing 8 leans on tightly on eccentric shaft 10's shaft shoulder and gyro wheel 9, gyro wheel 9 leans on the bearing 8 to support, gland 3 fixed connection is on eccentric shaft 10 in the bearing, gland 2 fixed connection is on gyro wheel 9 outside the bearing. The shaft retainer ring 5 is provided outside the inner ring of the bearing 8 and is in surface contact with the bearing inner cover 3. The circlip for hole 6 is provided outside the outer ring of the bearing 8 to adjust the clearance of the bearing 8.
Referring to fig. 1 and 2, the eccentric roller assembly 15 is connected to the rotating member 1 and the mounting frame 12, respectively, and is fixed to the positioning hole of the mounting frame 12 through an eccentric shaft, wherein h is a radial deviation of the eccentric shaft, the rotating member 1 of the fan is mounted on the roller 9, and the roller 9 is supported by the bearing 8 to rotate on the eccentric shaft 10. After the gap between the bearing 8 is adjusted by the shaft retainer ring 5 and the hole retainer ring 6, the bearing 8, the eccentric wheel assembly elastic pad 13 and the 2-type hexagon nut 14 are pressed by the bearing outer pressing cover 2 and the bearing inner pressing cover 3 to screw the roller assembly on the roller mounting frame 12. The roller 9 is provided with a trapezoidal groove, an annular trapezoidal boss on the fan rotating member is embedded in the trapezoidal groove of the roller, and the eccentric wheel assembly limits the axial displacement and the radial displacement of the rotating member. The trapezoidal groove of the roller is matched with the annular trapezoidal bulge of the rotary member, as shown in figures 3 and 4.
Because the size of the rotating part is larger, a plurality of eccentric roller assemblies are uniformly distributed on the inner circumference of the rotating part to be supported together. The eccentric roller assembly is fixed on the mounting frame. The roller is provided with a trapezoidal groove, the annular trapezoidal boss on the rotating part is embedded in the trapezoidal groove of the roller, and the eccentric wheel component limits the axial displacement and the radial displacement of the rotating part. The trapezoids of the rollers are matched with the bulges of the rotating part, and the rotating center of the rotating part can be adjusted by adjusting the eccentric shaft. After the supporting is finished, the centering is started, as shown in fig. 5, a first dial indicator 21 and a second dial indicator 22 are installed on a fixing piece in a supported structure, the position vector direction passes through the rotation center of a workpiece, the distance between a contact and the rotation center is equal to the rotation radius, the position vector directions of the two dial indicators are 90 degrees, the contact is perpendicular to the surface of a rotating piece, the rotating piece is rotated, the pointer of the dial indicator is observed to jump, the diameter is smaller when the pointer is clockwise, and the diameter is larger when the pointer is counterclockwise. If two hands jump x clockwise and the other hand jumps y, adjusting the eccentric shafts of two assemblies (such as the first schematic eccentric roller assembly 23 and the second schematic eccentric roller assembly 24) which are closest to the two dial indicators and two assemblies (such as the third schematic eccentric roller assembly 25 and the fourth schematic eccentric roller assembly 26) corresponding to 180-degree positions until the values of the hands are changed to x/2 and y/2, continuing to rotate the revolving component, and repeating the above operations until the hands point to the zero position slowly, and the centers of the revolving components are centered.
Example 2
In the continuous development of the crane machinery industry at home and abroad, for example, a crane with an upper-lower double-layer rotary trolley structure becomes an inevitable trend in the manufacturing development of the crane, for example, a lifting structure rotary working platform for a dredger is taken as an example, the maximum diameter 8440mm of a workpiece belongs to a large rotary structure, and the workpiece can be supported by a plurality of eccentric wheel assemblies and mounting frames.
According to work piece design support frame and eccentric wheel subassembly, earlier during the installation according to eccentric wheel subassembly: the roller 9 is supported on the eccentric shaft 10 by the bearing 8, the gap of the bearing 8 is adjusted by the shaft washer 5 and the hole retainer ring 6, and finally the bearing is compressed by the bearing outer gland 2 and the bearing inner gland 3, thus completing the assembly of each eccentric wheel component, as shown in figure 1. The eccentric wheel assembly 15 is mounted on the mounting frame 12 and is uniformly mounted on the mounting holes of the mounting frame according to the following steps: the eccentric wheel assembly 15 is pressed against the mounting frame 12 by the lock nut 14 after the axial position thereof is adjusted by the adjusting pad 11 and the elastic pad 13. After a rotary workpiece is installed, the rotary center is adjusted, two dial indicators are installed on a fixing piece, a contact is perpendicular to the rotary center, the distance between the contact and the rotary center is equal to the rotary radius, the position vector directions of the two dial indicators pass through the rotary center and form a 90-degree angle with each other, and the angle is shown in figure 5. Rotating the rotating member, observing the runout of the pointers of the two dial indicators, setting the pointer runout x of the first dial indicator and the pointer runout y of the second dial indicator, adjusting the eccentric shafts of the two assemblies 23 and 24 which are closest to the two dial indicators and the two assemblies 25 and 26 which correspond to 180-degree positions until the values of the pointers are changed into x/2 and y/2, continuing to rotate the rotating member, repeating the above operations until the pointers point to zero positions, and slowly finishing centering at the center of the rotating member.
The large-scale rotary floating crane is novel maritime work equipment, the diameter of a rotary lower support of the large-scale rotary floating crane is more than ten meters, and the rotary structure is large in diameter and high in precision, so that the support can be realized by adopting an eccentric wheel assembly and a support frame.
Example 3
In order to meet the requirement of large load on the basis of the embodiment 1, the requirement can be met by adjusting the number and the size of the eccentric wheel assemblies or adopting a method of supporting the eccentric wheel assemblies in parallel in multiple rows. As shown in fig. 6 and 7, an inner bearing retainer 16 and an outer bearing retainer 17 are arranged between the two bearings, two parallel trapezoidal grooves are arranged on the roller 9, correspondingly, trapezoidal bosses corresponding to the two parallel trapezoidal grooves are arranged on the rotating member, and the support of the rotating member is completed by matching the double rows of parallel trapezoidal bosses and the double rows of parallel trapezoidal grooves, so that the requirement of heavy load is met, and correspondingly, a structure of multi-row parallel support can be adopted for better support, and the shapes of the bosses and the grooves can be adaptively changed.
In conclusion, the invention adopts the plurality of eccentric wheel assemblies to carry out split type support on the rotating member, and can support the rotating member with larger diameter relative to the integral bearing. The method for supporting the eccentric wheel assemblies together can avoid the situation that the integral support needs to be subjected to reprocessing such as grinding in the installation process, and the aligning of the rotary piece is guaranteed by adjusting the eccentric shaft, so that the requirement on the position precision of the installation hole in the support frame is not high, and the processing difficulty is reduced. And the single eccentric wheel assembly adopts a method that the roller is supported on the eccentric shaft by the bearing, and the bearing inner gland and the bearing outer gland are pressed by the gasket to adjust the gap and then are screwed on the eccentric shaft and the roller by the screw. The method that the eccentric shafts and the cams are supported by the small bearings ensures the supporting strength and can meet the requirement of large load. The bearing can be used for supporting the rotating member, is particularly suitable for large-diameter rotating members, can replace a bearing, has no design of an inner ring of the bearing, and reserves enough space for the design of the inner part of a practical application rotating center. The problem that the large-diameter rotating part cannot realize supporting is solved, or the bearing is replaced under the conditions that the bearing processing difficulty is high, the precision is difficult to guarantee, and the cost is high. The eccentric wheel assembly is used for relieving the limitation on the diameter size of the rotating part in the design process, the size and the number of the assemblies can be adjusted to meet the requirements of various weight loads, the rigidity and the strength are ensured, the weight is light, and the occupied space is small. And each part processing is simple, and the operational reliability is good, and the installation adjustment is convenient, can replace the bearing in many structures, effective reduce cost.
Claims (8)
1. An eccentric roller assembly bearing revolution mechanic, characterized by, includes: mounting bracket (12) and a plurality of eccentric roller assemblies (15), a plurality of eccentric roller assemblies (15) are fixed on mounting bracket (12) through the eccentric shaft and a plurality of eccentric roller assemblies (15) evenly set up on certain circumference of mounting bracket (12), a plurality of eccentric roller assemblies (15) include: gyro wheel (9), bearing (8), eccentric shaft (10), bearing outer gland (2), gland (3) in the bearing, wherein, bearing outer gland (2), gland (3) set up respectively in bearing (8) outside and inboard and compress tightly bearing (8), the inboard of bearing (8) is leaned on tightly on shoulder and gyro wheel (9) of eccentric shaft (10), bearing (8) bearing is leaned on in gyro wheel (9), gland (3) fixed connection in eccentric shaft (10) one end and the bearing, gyro wheel (9) set up in bearing outer gland (2) outside and with bearing outer gland (2) fixed connection, the eccentric shaft (10) other end is connected with mounting bracket (12).
2. The arrangement according to claim 1, characterized in that the plurality of eccentric roller assemblies (15) further comprise a shaft retainer (5), the shaft retainer (5) being arranged outside the inner ring of the bearing (8) in surface contact with the bearing inner gland (3).
3. The arrangement according to claim 1, characterized in that the plurality of eccentric roller assemblies (15) further comprises a circlip for holes (6), the circlip for holes (6) being arranged outside the outer ring of the bearing (8) for adjusting the clearance of the bearing (8).
4. A structure according to claim 1, characterized in that the eccentric shaft (10) is provided in its middle section with an outward annular boss, the eccentric shaft (10) is provided in its front and rear sections with a predetermined offset of its axis, and that an adjustment pad (11) is provided between the side of said annular boss and the mounting frame (12).
5. The arrangement according to claim 1, characterized in that the eccentric roller assembly (15) is lockingly connected to the mounting frame (12) by means of a hexagonal nut (14).
6. A structure according to claim 1, characterized in that the outer ring of the roller (9) is provided with a V-shaped groove, and the V-shaped groove of the roller (9) is connected with the protrusion of the rotating member in a matching way.
7. A method of adjusting an eccentric roller assembly support revolution structure, wherein the eccentric roller assembly support revolution structure is the eccentric roller assembly support revolution structure of any one of claims 1 to 6, the method comprising: a first dial indicator (21) and a second dial indicator (22) are fixed on the mounting frame (12), so that the position vector directions of the first dial indicator (21) and the second dial indicator (22) both pass through the rotation center of the workpiece, the distance between a contact and the rotation center is equal to the rotation radius, an included angle between the position vector directions of the first dial indicator (21) and the second dial indicator (22) and a connecting line of the rotation center is 90 degrees, and the contact is perpendicular to the upper surface of the rotation member; rotating the rotating member, and observing the jumping of the pointers of the first dial indicator (21) and the second dial indicator (22); and adjusting the eccentric roller assembly (15) according to the pointer jumping conditions of the first dial indicator (21) and the second dial indicator (22).
8. The method of claim 7, further comprising: step 1: if one pointer jumps x and the other pointer jumps y, adjusting eccentric shafts of the eccentric roller assemblies closest to the two dial indicators and the eccentric roller assemblies corresponding to the positions of 180 degrees until the numerical values of the pointers are changed into x/2 and y/2; and 2, repeating the step 1 until the pointer points to the zero position.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110427517.9A CN113389804B (en) | 2021-04-20 | 2021-04-20 | Eccentric roller assembly bearing rotation structure and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110427517.9A CN113389804B (en) | 2021-04-20 | 2021-04-20 | Eccentric roller assembly bearing rotation structure and adjusting method thereof |
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| CN113389804A CN113389804A (en) | 2021-09-14 |
| CN113389804B true CN113389804B (en) | 2023-03-28 |
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1668263B1 (en) * | 2003-10-02 | 2010-03-24 | Wilhelm Landwehr | Pivot bearing arrangement of a rotational body |
| CN100344887C (en) * | 2005-09-20 | 2007-10-24 | 天津大学 | Ferris wheel bearing roller type support structure |
| CN102826425A (en) * | 2012-07-19 | 2012-12-19 | 南京高立工程机械有限公司 | Anti-drop roller |
| CN104098037B (en) * | 2014-06-30 | 2016-04-13 | 山东核电设备制造有限公司 | Cantilever crane device and equalizing gear thereof and cantilever crane system |
| CN204082951U (en) * | 2014-09-01 | 2015-01-07 | 海宁虎霸重工有限公司 | The linkage structure of roller and eccentric shaft in building hoist |
| CN106348200B (en) * | 2016-08-31 | 2019-01-15 | 泰富重工制造有限公司 | Centering swing mechanism and centering slewing equipment |
| NO342776B1 (en) * | 2016-12-23 | 2018-08-06 | Apl Tech As | Structural suspension of radial turret bearings |
| CN112066873A (en) * | 2020-07-17 | 2020-12-11 | 沪东中华造船(集团)有限公司 | Centering method of ship main engine and gear box |
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