CN111855204B - Installation method and installation device for magnetic-liquid double-suspension bearing performance detection device - Google Patents
Installation method and installation device for magnetic-liquid double-suspension bearing performance detection device Download PDFInfo
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- CN111855204B CN111855204B CN202010687113.9A CN202010687113A CN111855204B CN 111855204 B CN111855204 B CN 111855204B CN 202010687113 A CN202010687113 A CN 202010687113A CN 111855204 B CN111855204 B CN 111855204B
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Abstract
The invention discloses a mounting method and a mounting device for a magnetic-liquid double-suspension bearing performance detection device. Through the adjustment and the arrangement of the installation sequence of the components, in the process of replacing the main shaft each time, the main shaft with the magnetic sleeve can be taken out only by disassembling the second end cover of the first radial bearing unit and the front end cover of the axial bearing unit, and other components are kept still, so that the assembly precision of the magnetic-liquid double-suspension bearing is obviously improved.
Description
Technical Field
The invention relates to the field of bearings, in particular to a mounting method and a mounting device for a magnetic-liquid double-suspension bearing performance detection device or a test bench.
Background
With the continuous development of science and technology towards high precision, the traditional bearing can not meet the production requirement. The magnetic-liquid double-suspension bearing has the advantages of large rigidity and convenience in adjustment and control, so that the magnetic-liquid double-suspension bearing is continuously developed. Therefore, the magnetic-liquid double-suspension bearing is widely accepted, but the performance of the magnetic-liquid double-suspension bearing is different according to the difference of the magnetic conductive rings, and the accurate data of the conditions such as bearing capacity, rigidity and the like can be obtained through the performance detection device. In the process of the detection device, because the magnetic liquid double-suspension bearing has more parts, the installation process is more complicated and inconvenient to disassemble, the accuracy of the bearing is greatly influenced by installation errors during installation, and the magnetic liquid double-suspension bearing cannot normally rotate and work and cannot be accurately detected due to small installation errors.
Disclosure of Invention
In view of the problems of the prior art, the present invention provides a mounting method and a mounting apparatus for a magnetic liquid double suspension bearing detection apparatus, which can reduce mounting matching surfaces, reduce mounting errors, and facilitate and accurate mounting.
In order to solve the above technical problems, in one aspect, the present invention provides an installation method for a magnetic liquid double suspension bearing performance detection apparatus, where the magnetic liquid double suspension bearing includes a first radial bearing unit installed on a first installation frame, a second radial bearing unit and an axial bearing unit installed on a second installation frame at the same time, and the installation method includes the following installation steps:
s1, assembling a first radial bearing unit, comprising the sub-steps of:
s11, directly fixing a first stator of the first radial bearing unit on the second side surface of the first mounting frame through a fastener, wherein the head of the fastener is screwed into a first mounting hole on the first mounting frame from the direction of the first side surface of the first mounting frame, and the first mounting hole is a countersunk hole;
s12, directly fixing the first end cover of the first radial bearing unit on the first side face of the first mounting frame through a fastener, wherein the head of the fastener is screwed into the second mounting hole on the first mounting frame from the outer surface of the first end cover;
s2, assembling the second radial bearing unit and the axial bearing unit, comprising the sub-steps of:
s21, fixing the second stator of the second radial bearing unit on the first side of the second mounting frame through a fastener, wherein the head of the fastener is screwed into a first mounting hole on the second mounting frame from the direction of the second side surface of the second mounting frame, and the first mounting hole is a countersunk hole;
s22, fixing the middle end cover of the axial bearing unit on the second side of the second mounting frame through a fastener, wherein the head of the fastener is screwed into the second mounting hole in the second mounting frame from the direction of the second side face of the second mounting frame;
s23, fixing an adjusting ring of the axial bearing unit on the middle end cover through a fastener, and screwing the head of the fastener into a countersunk hole on the adjusting ring; eight mounting holes are uniformly processed on the stator part of the axial bearing and the first end cover part of the axial bearing;
s3, performing finish machining on the assembled main body parts of S1 and S2 before assembly, and performing finish machining on the matching surface of the first stator and the second end cover, the second stator and the adjusting ring on a numerical control machining center to ensure the verticality of the matching surface between the first stator, the second stator and the adjusting ring and the mounting frame and the coaxiality between the inner ring surfaces of the first stator and the second stator and the inner ring surface of the adjusting ring;
s4, assembling the spindle, wherein the method comprises the following substeps:
s41, sleeving a magnetic sleeve of the second radial bearing on the main shaft, and fixing the magnetic sleeve through a spring collar to prevent the magnetic sleeve from moving along the axial direction;
s42, installing the lip-shaped sealing ring in place, sleeving a magnetic conduction sleeve of the first radial bearing unit and fixing the magnetic conduction sleeve by using a spring collar;
s43, sequentially enabling the main shaft provided with the magnetic conduction ring to pass through the axial bearing unit and the second radial bearing unit, sequentially sleeving the rear end cover of the second radial bearing unit and the front end cover of the first radial bearing unit on the main shaft, and then enabling the main shaft to penetrate through the first radial bearing unit;
s44, fixing the rear end cover sleeved on the main shaft on the second stator through a fastener, wherein the head of the fastener is screwed into the second stator from the outer surface of the rear end cover; fixing a front end cover on the adjusting ring through a fastener, wherein the head of the fastener is screwed into the adjusting ring from the outer surface of the front end cover;
and S45, sleeving the lip-shaped sealing ring of the first radial bearing unit and a second end cover on the main shaft, and screwing the head of the fastener into the second mounting hole of the first stator from the outer surface of the second end cover.
Preferably, when the spindle needs to be disassembled, the front end cover of the axial bearing unit is disassembled from the adjusting ring, the second end cover is disassembled from the first stator, and the spindle and the magnetic sleeve on the spindle can be taken out from the adjusting ring.
Preferably, four first mounting holes are uniformly formed in the first mounting frame in the circumferential direction, four second mounting holes are uniformly formed in the first mounting frame in the circumferential direction, and the first mounting holes and the second mounting holes are arranged at intervals.
Preferably, the flux sleeve on the main shaft is fixed by a spring collar, and the installation surfaces of the flux sleeve are located on one side of the axial thrust disk.
Preferably, the second mounting bracket is an end cap of the second radial bearing unit, and a ring of U-shaped grooves are formed on the surface of the second mounting bracket near the outer circumference, and sealing rings for preventing oil from leaking from the contact surface are arranged in the U-shaped grooves.
In a second aspect of the present invention, there is provided a mounting apparatus for detecting performance of a magnetic-hydraulic double-suspension bearing, which is adapted to the aforementioned mounting method, and includes a base plate, a first mounting bracket and a second mounting bracket provided on the base plate, a first radial bearing unit mounted on the first mounting bracket, a second radial bearing unit and an axial bearing unit simultaneously mounted on the second mounting bracket, and a spindle provided through the first radial bearing unit, the second radial bearing unit and the axial bearing unit;
the first radial bearing unit comprises a first end cover, a second end cover and a first stator, the first stator is directly fixed on the second side of the first mounting frame through a fastener, the first stator and the second side of the first mounting frame form a matching pair, and the second side of the first mounting frame is used for positioning and mounting the end face of the first stator; the end face of the first stator, which is attached to the first mounting frame, serves as a positioning face to position the end face, the first stator is fastened and connected through a fastener extending into the first side face of the first mounting frame, and the second end cover is connected with the right end face of the first stator through the fastener;
the second radial bearing unit comprises a second stator and a rear end cover, the second stator is fixed on the first side of the second mounting frame through a fastener, and a matching pair is formed between the second stator and the second mounting frame; the rear end cover is directly connected with the second stator through a fastener, and a matching pair is formed between the rear end cover and the first end face of the second stator;
the axial bearing unit comprises a middle end cover, an adjusting ring and a front end cover, wherein the middle end cover is fixed on the second side surface of the second mounting frame through a fastener and forms a matching pair with each other; the adjusting ring is fixed on the middle end cover through a fastener, the front end cover is connected with the adjusting ring, and the adjusting ring and the middle end cover form a matching pair and carry out end face positioning; the front end cover is limited through the adjusting ring.
Furthermore, the first mounting rack and the second mounting rack are perpendicular to the upper surface of the bottom plate, the shape and position tolerance of the verticality between the surface of the first side face of the first mounting rack and the upper surface of the bottom plate and the shape and position tolerance of the second side face of the first mounting rack and the upper surface of the bottom plate are 0.1mm, and the shape and position tolerance of the verticality between the first side face of the second mounting rack and the upper surface of the bottom plate and the second side face of the second mounting rack are 0..
Further, the first mounting frame and the first stator are connected through four screws arranged at intervals.
Compared with the prior art, the invention has the following beneficial effects:
when dismantling the two suspension bearings of magnetism liquid, only need pull down closing cap and first radial bearing unit right-hand member end cover, second radial bearing's left end cover and axial bearing unit's right-hand member lid after, can take out the main shaft from the direction of axial bearing unit, because the two suspension bearing's of magnetism liquid left stator, right stator and axial adjusting ring all need not change at every dismantlement after numerical control boring machining, when reducing the part number of dismantling and installing, retrencied the dismouting process, further guaranteed the precision of the two suspension bearing's of magnetism liquid main part and the holistic precision of bearing.
Drawings
FIG. 1 is a general cross-sectional view of a magnetic-liquid double-suspension bearing performance detection device according to the present invention;
FIG. 2 is an overall perspective view of the magnetic-liquid double-suspension bearing performance detection device of the present invention;
FIG. 3 is a cross-sectional view of a first radial bearing unit;
FIG. 4 is a cross-sectional view of a second radial unit and an axial bearing unit;
FIG. 5 is a schematic view of a spindle of the magnetic liquid double-suspension bearing performance detection device of the present invention;
FIG. 6 is a schematic view of a magnetic-liquid double-suspension bearing axial stator;
FIG. 7 is a schematic view of a magnetic-liquid double-suspension bearing bottom plate;
fig. 8A is a front sectional view of the first mount, and fig. 8B is a rear sectional view of the first mount;
fig. 9A is a front sectional view of the second mount, and fig. 9B is a rear sectional view of the second mount;
FIG. 10A is a schematic view of an axial stator, and FIG. 10B is a cross-sectional view of the axial stator;
FIG. 11A is a schematic view of an adjustment ring, and FIG. 11B is a cross-sectional view of the adjustment ring; and
FIG. 12 is a schematic diagram of the installation steps of the magnetic liquid double suspension bearing performance detection device.
Wherein: 1. an axial bearing unit; 2. a second radial bearing unit; 3. a main shaft; 31. the spindle magnetic sleeve matching surface; 32. a spring collar groove; 33. an axial thrust disk; 4. a radial vibration unit; 41. a radial vibration unit mounting bracket; 42. a radial vibration motor; 43. a radial vibration cylinder; 44. a cross hinge; 5. A base plate; 51. a first mounting bracket; 511. a counterbore of the first mounting hole; 512. a first mounting hole; 513. A second mounting hole; 514. a first mount first side; 515. a first mount second side; 52. A second mounting bracket; 521. a second mounting bracket first mounting hole; 522. a first mounting hole counter bore; 523. a second mounting hole of the second mounting bracket; 524. a second mount first side; 525. a second mount second side; 526. a U-shaped groove; 6. an axial vibration unit; 61. a cylinder; 62. an axial vibration motor; 63. axially vibrating the motor slide; 64. an axial vibration motor mount; 7. a first radial bearing unit; 8. a first end cap; 9. a first stator; 91. a winding post; 92. a stator body; 93. a mounting hole connected with the first mounting bracket; 94. an oil inlet hole; 95 mounting holes connected with the second end cap; 10. a stator coil; 11. a second end cap; 12. a flux sleeve; 13. a rear end cap; 14. a second stator; 15. a middle end cap; 151. a fastener counterbore positioned with the second mounting bracket; 152. a fastener eyelet positioned with the second mount; 153. A coil slot; 154. a mounting hole positioned with the adjusting ring; 16. an adjustment ring; 161. a fastener eyelet positioned with the rear end cap; 162. a fastener counter bore for positioning with the rear end cap; 163. a mounting hole for positioning with the adjusting ring; 17. a front end cover; 18. an axial bearing coil; 19. lip-shaped sealing ring.
Detailed Description
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
As shown in fig. 1 and 2, the magnetic-hydraulic double-suspension bearing performance detection apparatus capable of reducing installation errors according to the present invention includes a base plate 5 having a first mounting frame 51 and a second mounting frame 52, a first radial bearing unit 7, a second radial bearing unit 2, and an axial bearing unit 1 disposed on the base plate 5, and a main shaft 3 sequentially penetrates through the first radial bearing unit 7, the second radial bearing unit 2, and the axial bearing unit 1. A radial vibration unit 4 for supplying a radial force for detection is provided at a middle position of the main shaft 3, and an axial vibration unit 6 for supplying an axial force for detection is provided at an end position of the main shaft 3. The axial vibration unit 6 includes an axial vibration motor mount 64 provided on the base plate 5, a cylinder 61 provided on the mount, an axial vibration motor slider 63, and an axial vibration motor 62. The radial vibration unit 4 includes a radial vibration unit mounting bracket 41 provided on the base plate 5, a cross hinge 44 sequentially mounted on the radial vibration unit mounting bracket 41, a radial vibration cylinder 43, and a radial vibration motor 42.
As shown in fig. 3, the first radial bearing unit 7 includes a flux sleeve 12, a first stator 9, a stator coil 10, a first end cap 8, and a second end cap 11. The magnetic conductive sleeve 12 is sleeved on the spindle 3, the first stator 9 is sleeved on the magnetic conductive sleeve 12, the first stator 9 comprises a first end face tightly attached to the first mounting frame 51 and a second end face tightly attached to the second end cover 11, a second mounting hole 93 connected with the first mounting frame 51 is arranged on the first end face, and the fastener is screwed into the second mounting hole 513 from the first side 514 of the first mounting frame 51, so that the first stator 9 is fixed to the first side face 514 of the first mounting frame 51. In addition, an oil inlet 94 for the hydraulic oil to enter is also provided on the first stator 9.
The second radial bearing unit 2 and the axial bearing unit 1 are mounted next to each other at a first end of the main shaft 3, and the first radial bearing unit 7 is mounted separately at a second end of the main shaft 3.
Eight mounting holes are formed in the first mounting frame 51 disposed on the bottom plate 5, an angle between any two adjacent mounting holes is 45 °, wherein countersunk holes 511 are formed in four first mounting holes 512, an angle between two adjacent mounting holes is 90 °, the winding posts 91 of the eight first stators of the first radial bearing unit 7 are wound with coils, and then the first stators 9 of the first radial bearing unit are fixed to the second side 515 of the first mounting frame 51 by fasteners. The first side of the first mounting bracket 51 is provided with mounting holes with counter bores, and then the first end cap 8 of the first radial bearing unit 7 is fixed to four second mounting holes 513 of the first side 514 of the first mounting bracket 51 by fasteners, wherein the angle between two adjacent mounting holes is 90 °.
Eight mounting holes are uniformly machined in the second mounting frame 52, the angle between any two adjacent mounting holes is 45 degrees, the second stator 14 wound with coils is mounted on the first side 524 of the second mounting frame after the mounting is completed, the middle end cover 15 is mounted on the second side of the second mounting frame 52, and the axial thrust disc 33 wound with the axial bearing coils 18 is located between the middle end cover 15 and the front end cover 17. Eight mounting holes are formed in the second mounting frame 52, the angles among the eight mounting holes are 45 degrees, four second mounting holes are formed in the second stator 14, the angles among the four second mounting holes are 90 degrees, and the middle end cover 15 and the second stator 14 are fixed to the second mounting frame 52 from two sides respectively through fasteners. The second stator is mounted similarly to the first stator, the middle end cover 15 includes a fastener eyelet 152 positioned with the second mounting bracket, a mounting hole 154 positioned with the adjusting ring, and a fastener counterbore 151 positioned with the second mounting bracket, when the middle end cover 15 is mounted, the coil is wound into the coil slot 153 of the middle end cover, then the fastener is mounted in the fastener eyelet 152 positioned with the second mounting bracket, and the head of the fastener is mounted in the fastener counterbore 151 positioned with the second mounting bracket, and the counterbore is used for preventing the head of the fastener from protruding to affect the assembly of other parts.
After mounting, the adjusting ring 16 of the axial bearing unit is mounted on the intermediate end cover 15 by means of fasteners. Eight mounting holes are uniformly processed on the adjusting ring 16, the angle between every two mounting holes is 45 degrees, wherein four mounting holes are fastener unthreaded holes 161 which are processed with fastener countersunk holes 162 for positioning with the rear end cover and are used for positioning with the adjusting ring, and the other four mounting holes are mounting holes 163 for mounting the front end cover 17 and are used for positioning with the adjusting ring, and the countersunk holes are used for preventing the heads of the fasteners from protruding to influence the assembly of other parts.
After the main body part is installed, in order to further improve the installation precision and reduce the error accumulated in the installation process, the main body part of the installed magnetic-liquid double-suspension bearing is further finished by using a numerical control machining center. And performing finish machining on the assembled main body part before assembly, moving a numerical control machining center to enable the main body part to be close to each main body part which is arranged on the base, performing finish machining on the matching surfaces of the first stator 9 and the second end cover 11, the second stator 14 and the adjusting ring 16, ensuring the verticality of the matching surfaces between the first stator 9, the second stator 14 and the adjusting ring 16 and the mounting frame and the coaxiality between the inner annular surface of the first stator 9 and the second stator 14 and the inner annular surface of the adjusting ring 16, milling the end surface taking the radial bearing unit as the mounting surface and the left end surface of the axial bearing unit, ensuring the verticality of the end surface taking the mounting surface and the bottom plate, reducing form and position errors caused by the mounting process to a certain extent, and further improving the mounting precision of the magnetic-liquid double-suspension bearing.
FIG. 5 is a schematic diagram of a main shaft of the magnetic-liquid double-suspension bearing performance detection device of the present invention. The main shaft 3 is provided with an annular groove 32 for mounting a spring clamping ring and a boss 31 matched with the magnetic conductive sleeve 12 of the magnetic liquid double-suspension bearing. The radius of the boss 31 is 1-2mm larger than the radius of the main shaft between the two magnetic sleeves 12, which is used for preventing the lip-shaped seal ring 19 at the positions of the magnetic sleeves 12 and the second radial bearing unit from being unable to move to a corresponding position due to the diameter problem or reducing the sealing effect caused by excessive abrasion in the moving process, wherein the spring clamp ring 121 is used for fixing the magnetic sleeves 12 matched with the main shaft, and preventing the magnetic sleeves 12 from shifting along the axial direction. The magnetic conductive sleeve 12 is installed at a corresponding position of the main shaft 3, and after the lip-shaped sealing ring 19 is sleeved at the corresponding position, the magnetic conductive sleeve sequentially passes through the axial bearing unit 1 and the second radial bearing unit 2, and then, the rear end cover 13 and the front end cover 17 are sleeved on the main shaft 3, and then, the magnetic conductive sleeve passes through the first radial bearing unit 7 and is installed in place.
As shown in fig. 6, the first stator 9 includes a stator main body 92 and a winding post 91 provided on an inner surface of the stator main body 92. The stator main body 92 is further provided with an oil inlet 94, a mounting hole 93 which is perpendicular to the oil inlet 94 and is arranged at intervals and connected with the first mounting frame, and a mounting hole 95 which is connected with the second end cover.
After being installed in place and adjusted, the front end cover 17 is installed and the rear end cover 13 fitted over the main shaft 3 is installed on the second stator 14 opposite thereto and fixed with fasteners. In some preferred embodiments, it is also necessary to mount a closure on the outside of the end cap in order to ensure a better seal.
When the magnetic liquid double suspension bearing is disassembled, the main shaft 3 can be pulled out from the direction of the axial bearing unit 1 only by disassembling the front end cover 17 and the second end cover 11, and other parts do not need to be disassembled. Because the first stator 9 of the first radial bearing unit 7, the second stator 14 of the second radial bearing unit 2, the middle end cover 15 of the axial bearing unit and the adjusting ring 16 of the magnetic-hydraulic double-suspension bearing are not required to be taken down after numerical control boring processing when the main shaft 3 is dismounted every time, the number of parts for dismounting and mounting is reduced, the dismounting and mounting process is simplified, and meanwhile, the precision of the main body part of the magnetic-hydraulic double-suspension bearing and the whole precision of the bearing are further ensured.
After the spindle 3 is taken down, the spring collar 121 on the spindle 3 is taken down, the flux sleeve 12 is taken out along the axial direction, a new flux sleeve 12 is installed at the corresponding position of the spindle 3, and the new flux sleeve is fixed by the spring collar 121. The main shaft 3 which is provided with the new magnetic sleeve 12 penetrates from one side of the adjusting ring 16 which is close to the axial bearing unit 1 along the axial direction, and because the first stator 9, the second stator 14 and the middle end cover 15 and the adjusting ring 16 of the axial bearing unit 1 are not dismounted again when the main shaft 3 is arranged, the precision of the magnetic-liquid double-suspension bearing after the magnetic sleeve 12 is replaced can be ensured, and the installation error is not accumulated any more.
As is apparent from the above description, the magnetic-hydraulic double suspension bearing performance detection apparatus of the present invention includes a base plate 5, a first mounting bracket 51 and a second mounting bracket 52 provided on the base plate 5, a first radial bearing unit 7 mounted on the first mounting bracket 51, a second radial bearing unit 2 and an axial bearing unit 1 simultaneously mounted on the second mounting bracket 52, and a main shaft 3 provided through the first radial bearing unit 7, the second radial bearing unit 2 and the axial bearing unit 1. Also, a radial vibration unit 4 and an axial vibration unit 6 are provided on the base plate for radial and axial forces for bearing element testing.
The first radial bearing unit 7 comprises a first end cover 8, a second end cover 11 and a first stator 9, the first stator 9 is directly fixed on the second side of the first mounting frame 51 through a fastener, the first stator 9 and the second side 515 of the first mounting frame 51 form a matching pair, and the second side 515 of the first mounting frame 51 performs end face positioning and mounting on the first stator 9; the end face of the first stator 9 attached to the first mounting frame 51 serves as a positioning face for positioning the end face, the first stator 9 is fastened and connected through a fastener extending from the first side face 514 of the first mounting frame 51, the second end cover 11 is connected with the right end face of the first stator 9 through a fastener, and the fastener is mounted in a mounting hole 95 of the stator;
the second radial bearing unit 2 comprises a second stator 14 and a rear end cover 13, the second stator 14 is fixed on the first side 524 of the second mounting frame 52 through a fastener and forms a matching pair with each other; the rear end cover 13 is directly connected with the second stator 14 through a fastener, and a matching pair is formed between the rear end cover 13 and the first end face of the second stator 14;
the axial bearing unit 1 comprises an intermediate end cover 15, an adjusting ring 16 and a front end cover 17, wherein the intermediate end cover 15 is fixed on the second side surface 525 of the second mounting frame 52 through a fastener and forms a matching pair with each other; the adjusting ring 16 is fixed on the middle end cover 15 through a fastener, the front end cover 17 is connected with the adjusting ring 16, and the adjusting ring 16 and the middle end cover 15 form a matching pair and carry out end face positioning; the front end cap 17 is retained by the adjustment ring 16.
Further, the first mounting bracket 51 and the second mounting bracket 52 are both perpendicular to the upper surface of the bottom plate 5, and the form and position tolerance of the perpendicularity between the surface of the first side surface 514 and the second side surface 515 of the first mounting bracket 51 and the upper surface of the bottom plate 2 is 0.1mm, and the form and position tolerance of the perpendicularity between the first side surface 524 and the second side surface 525 of the second mounting bracket 52 and the upper surface of the bottom plate 5 is 0.1 mm.
Moreover, the first mounting frame 51 is connected with the first stator 9 through four screws arranged at intervals.
In addition, before the second end cover 11, the rear end cover 13 and the front end cover 17 are installed, the main body on which the first stator 9, the second stator 14 and the adjusting ring 16 are installed is processed through numerical control boring, the verticality between the end surface of the first stator 9, the end surface of the second stator 14 and the end surface of the adjusting ring 16 and the installation frame 5 and the coaxiality between the inner ring surface of the first stator 9 and the second stator 14 and the inner ring surface of the adjusting ring 16 are ensured, the installation accuracy of the main body part of the magnetic-liquid double-suspension bearing before the end cover is installed is only related to the installation frames 51 and 52, and the accuracy of the magnetic-liquid double-suspension bearing is improved.
In a second aspect of the present invention, there is provided a method for mounting a magnetic liquid double suspension bearing performance testing apparatus capable of reducing mounting errors, wherein the magnetic liquid double suspension bearing comprises a first radial bearing unit 7 mounted on a first mounting frame 51, a second radial bearing unit 2 and an axial bearing unit 1 simultaneously mounted on a second mounting frame 52, and the mounting process comprises the following steps:
s1, assembling the first radial bearing unit 7, which comprises the following sub-steps:
s11, directly fixing the first stator 9 of the first radial bearing unit to the second side 515 of the first mounting frame 51 through a fastener, wherein the head of the fastener is screwed into the first mounting hole 512 of the first mounting frame 51 from the direction of the first side 514 of the first mounting frame 51, and the first mounting hole 512 is processed with a countersunk hole 511;
s12, fixing the first end cap 8 of the first radial bearing unit 7 directly on the first side surface 514 of the first mounting bracket 51 through a fastener, the head of the fastener being screwed into the second mounting hole 513 on the first mounting bracket 51 from the outer surface of the first end cap 8;
s2, assembling the second radial bearing unit 2 and the axial bearing unit 1, which includes the following substeps:
s21, fixing the second stator 14 of the second radial bearing unit to the first side 524 of the second mounting frame 52 by a fastener, wherein the head of the fastener is screwed into the first mounting hole 521 on the second mounting frame 52 from the direction of the second side 525 of the second mounting frame 52, and the first mounting hole is processed with a counter bore 522;
s22, fixing the middle end cover 15 of the axial bearing unit 1 to the second side 525 of the second mounting bracket 52 through a fastener, where the fastener passes through the fastener light hole 152 of the middle end cover 15 located on the second mounting bracket and is fixedly connected to the second mounting bracket 52, and the fastener light hole 152 located on the second mounting bracket is processed with a fastener countersunk hole 151 located on the second mounting bracket;
s23, fixing the adjusting ring 16 of the axial bearing unit 1 on the middle end cover 15 through a fastener, and screwing the head of the fastener into the counter bore 162 on the adjusting ring 16; eight mounting holes are uniformly processed on the adjusting ring 16 and the middle end cover 15, and the circumferential included angle between two adjacent mounting holes is 45 degrees.
S3, performing finish machining on the assembled main body parts of S1 and S2 before assembly, and performing finish machining on the matching surfaces of the first stator 9 and the second end cover 11, the second stator 14 and the adjusting ring 16 on a numerical control machining center to ensure the perpendicularity of the matching surfaces between the parts of the first stator 9, the second stator 14 and the adjusting ring 16 and the mounting frame and the coaxiality between the inner annular surfaces of the first stator 9 and the second stator 14 and the inner annular surface of the adjusting ring 16;
s4, assembling the spindle, wherein the method comprises the following substeps:
s41, sleeving the magnetic conduction sleeve 12 of the second radial bearing 2 on the main shaft 3, and fixing the magnetic conduction sleeve 12 through the spring retainer ring 121 to prevent the magnetic conduction sleeve 12 from moving along the axial direction;
s42, installing the lip-shaped sealing ring 19 in place, sleeving the magnetic conduction sleeve 12 of the first radial bearing unit 7 and fixing the magnetic conduction sleeve by using the spring clamping ring 121;
s43, sequentially enabling the main shaft 3 provided with the magnetic conductive sleeve 12 to pass through the axial bearing unit 1 and the second radial bearing unit 2, sequentially sleeving the rear end cover 13 of the second radial bearing unit 2 and the second end cover 11 of the first radial bearing unit 7 on the main shaft, and then penetrating the main shaft into the first radial bearing unit 7;
s44, fixing the rear end cover 13 sleeved on the main shaft on the second stator 14 through a fastener, wherein the head of the fastener is screwed into the second stator 14 from the outer surface of the rear end cover 13; fixing the front end cover 17 on the adjusting ring 16 through a fastener, wherein the head of the fastener is screwed into the adjusting ring 16 from the outer surface of the front end cover 17;
s45, the lip seal 19 of the first radial bearing unit 7 and the first end cap 8 are fitted over the main shaft 3, and the head of the fastener is screwed into the second mounting hole 513 of the first mounting bracket 51 from the outer surface of the first end cap 8.
When the spindle 3 needs to be disassembled, the front end cover 17 of the axial bearing unit 1 is disassembled from the adjusting ring 16, the second end cover 11 is disassembled from the first stator 9, and the spindle 3 and the magnetic conduction sleeve 12 on the spindle can be taken out from the adjusting ring 16.
In a preferred embodiment, four first mounting holes 512 are uniformly formed in the first mounting frame 51 along the circumferential direction, four second mounting holes 513 are uniformly formed in the circumferential direction, and the first mounting holes 512 and the second mounting holes 513 are spaced apart from each other.
Furthermore, the flux sleeve 12 on the spindle 3 is fixed by the spring collar 121, and the mounting surfaces of the flux sleeve 12 are all located on one side of the axial thrust disk 33.
Further, the second mounting bracket 52 is an end cap of the second radial bearing unit 2, and a ring of U-shaped groove 526 is formed on the surface thereof near the outer circumference, and a seal ring for preventing oil from leaking from the contact surface is provided in the U-shaped groove 526.
Firstly, when the magnetic-liquid double-suspension bearing needs to be disassembled, only the front end cover of the axial bearing unit and the second end cover of the first radial bearing unit need to be disassembled, and a main shaft of the magnetic-liquid double-suspension bearing can be taken out from the direction of the axial bearing unit at a position close to the adjusting ring, and other parts are kept still; and secondly, the first stator, the second stator and the axial adjusting ring of the magnetic-liquid double-suspension bearing are not required to be changed after being disassembled every time after being processed by a numerical control processing center such as a numerical control boring machine, so that the precision of the main body part of the magnetic-liquid double-suspension bearing and the precision of the whole bearing are effectively ensured. Through the adjustment and the arrangement of the installation sequence of the components, the spindle with the magnetic sleeve can be taken out only by disassembling the second end cover of the first radial bearing unit and the front end cover of the axial bearing unit in the process of replacing the spindle each time, so that the assembly precision of the magnetic-liquid double-suspension bearing is obviously improved.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments can still be modified, or some or all of the technical features thereof can be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A mounting method for a magnetic-hydraulic double-suspension bearing performance detection device, wherein the magnetic-hydraulic double-suspension bearing comprises a first radial bearing unit mounted on a first mounting frame, a second radial bearing unit and an axial bearing unit which are simultaneously mounted on a second mounting frame, and is characterized in that: the method comprises the following installation steps:
s1, assembling a first radial bearing unit, comprising the sub-steps of:
s11, directly fixing a first stator of the first radial bearing unit on the second side surface of the first mounting frame through a fastener, wherein the head of the fastener is screwed into a first mounting hole on the first mounting frame from the direction of the first side surface of the first mounting frame, and the first mounting hole is a countersunk hole;
s12, directly fixing the first end cover of the first radial bearing unit on the first side face of the first mounting frame through a fastener, wherein the head of the fastener is screwed into the second mounting hole on the first mounting frame from the outer surface of the first end cover;
s2, assembling the second radial bearing unit and the axial bearing unit, comprising the sub-steps of:
s21, fixing the second stator of the second radial bearing unit on the first side of the second mounting frame through a fastener, wherein the head of the fastener is screwed into a first mounting hole on the second mounting frame from the direction of the second side surface of the second mounting frame, and the first mounting hole is a countersunk hole;
s22, fixing the middle end cover of the axial bearing unit on the second side of the second mounting frame through a fastener, wherein the head of the fastener is screwed into the second mounting hole in the second mounting frame from the direction of the second side face of the second mounting frame;
s23, fixing an adjusting ring of the axial bearing unit on the middle end cover through a fastener, and screwing the head of the fastener into a countersunk hole on the adjusting ring; eight mounting holes are uniformly processed on the adjusting ring and the middle end cover;
s3, performing finish machining on the assembled main body parts of S1 and S2 before assembly, and performing finish machining on the matching surface of the first stator and the second end cover, the second stator and the adjusting ring on a numerical control machining center to ensure the verticality of the matching surface between the first stator, the second stator and the adjusting ring and the mounting frame and the coaxiality between the inner ring surfaces of the first stator and the second stator and the inner ring surface of the adjusting ring;
s4, assembling the spindle, wherein the method comprises the following substeps:
s41, sleeving a magnetic sleeve of the second radial bearing on the main shaft, and fixing the magnetic sleeve through a spring collar to prevent the magnetic sleeve from moving along the axial direction;
s42, installing the lip-shaped sealing ring in place, sleeving a magnetic conduction sleeve of the first radial bearing unit and fixing the magnetic conduction sleeve by using a spring collar;
s43, sequentially enabling the main shaft provided with the magnetic conduction ring to pass through the axial bearing unit and the second radial bearing unit, sequentially sleeving the rear end cover of the second radial bearing unit and the second end cover of the first radial bearing unit on the main shaft, and then enabling the main shaft to penetrate through the first radial bearing unit;
s44, fixing the rear end cover sleeved on the main shaft on the second stator through a fastener, wherein the head of the fastener is screwed into the second stator from the outer surface of the rear end cover; fixing a front end cover on the adjusting ring through a fastener, wherein the head of the fastener is screwed into the adjusting ring from the outer surface of the front end cover;
and S45, sleeving the lip-shaped sealing ring of the first radial bearing unit and a second end cover on the main shaft, and screwing the head of the fastener into the second mounting hole of the first stator from the outer surface of the second end cover.
2. The installation method for the magnetic-liquid double-suspension bearing performance detection device according to claim 1, characterized in that: when the main shaft needs to be disassembled, the front end cover of the axial bearing unit is disassembled from the adjusting ring, the second end cover is disassembled from the first stator, and the main shaft and the magnetic sleeve on the main shaft can be taken out from the adjusting ring.
3. The installation method for the magnetic-liquid double-suspension bearing performance detection device according to claim 1, characterized in that: evenly be equipped with four first mounting holes along the circumferencial direction on the first mounting bracket, evenly be equipped with four second mounting holes along the circumferencial direction, and first mounting hole with the second mounting hole interval sets up.
4. The installation method for the magnetic-liquid double-suspension bearing performance detection device according to claim 1, characterized in that: the magnetic conduction sleeve on the main shaft is fixed through a spring collar, and the installation surfaces of the magnetic conduction sleeve are all positioned on one side of the axial thrust disk.
5. The installation method for the magnetic-liquid double-suspension bearing performance detection device according to claim 1, characterized in that: the second mounting frame is used as an end cover of the second radial bearing unit, a circle of U-shaped groove is arranged on the surface of the second mounting frame close to the outer circumference, and a sealing ring for preventing oil from leaking from the contact surface is arranged in the U-shaped groove.
6. A mounting device for detecting the performance of a magnetic-liquid double-suspension bearing, which is applied to the mounting method of any one of claims 1 to 5, and is characterized in that: the spindle comprises a bottom plate, a first mounting frame and a second mounting frame which are arranged on the bottom plate, a first radial bearing unit arranged on the first mounting frame, a second radial bearing unit and an axial bearing unit which are simultaneously arranged on the second mounting frame, and a spindle which penetrates through the first radial bearing unit, the second radial bearing unit and the axial bearing unit;
the first radial bearing unit comprises a first end cover, a second end cover and a first stator, the first stator is directly fixed on the second side of the first mounting frame through a fastener, the first stator and the second side of the first mounting frame form a matching pair, and the second side of the first mounting frame is used for positioning and mounting the end face of the first stator; the end face of the first stator, which is attached to the first mounting frame, serves as a positioning face to position the end face, the first stator is fastened and connected through a fastener extending into the first side face of the first mounting frame, and the second end cover is connected with the right end face of the first stator through the fastener;
the second radial bearing unit comprises a second stator and a rear end cover, the second stator is fixed on the first side of the second mounting frame through a fastener, and a matching pair is formed between the second stator and the second mounting frame; the rear end cover is directly connected with the second stator through a fastener, and a matching pair is formed between the rear end cover and the first end face of the second stator;
the axial bearing unit comprises a middle end cover, an adjusting ring and a front end cover, wherein the middle end cover is fixed on the second side surface of the second mounting frame through a fastener and forms a matching pair with each other; the adjusting ring is fixed on the middle end cover through a fastener, the front end cover is connected with the adjusting ring, and the adjusting ring and the middle end cover form a matching pair and carry out end face positioning; the front end cover is limited through the adjusting ring.
7. The mounting device for detecting the performance of the magnetic-liquid double-suspension bearing according to claim 6, is characterized in that: the first mounting rack and the second mounting rack are perpendicular to the upper surface of the bottom plate, the shape and position tolerance of the perpendicularity of the surface of the first side face of the first mounting rack, the second side face of the first mounting rack and the upper surface of the bottom plate is 0.1mm, and the shape and position error of the perpendicularity of the first side face of the second mounting rack, the second side face of the second mounting rack and the upper surface of the bottom plate is 0.1 mm.
8. The mounting device for detecting the performance of the magnetic-liquid double-suspension bearing according to claim 6, is characterized in that: the first mounting frame is connected with the first stator through four screws arranged at intervals.
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| CN202010687113.9A CN111855204B (en) | 2020-07-16 | 2020-07-16 | Installation method and installation device for magnetic-liquid double-suspension bearing performance detection device |
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| CN104807629B (en) * | 2015-05-08 | 2017-11-17 | 武汉理工大学 | A kind of shafting electromagnetic hydraulic pressure comprehensive simulation test loading device |
| CN105954032B (en) * | 2016-05-24 | 2018-10-23 | 上海交通大学 | A kind of magnetic liquid lubrication floating-ring bearing test system and method |
| CN108801636B (en) * | 2018-06-01 | 2019-11-01 | 燕山大学 | A kind of axial loading device of bearing performance test experiments platform |
| CN108760304A (en) * | 2018-06-08 | 2018-11-06 | 燕山大学 | A kind of magnetic liquid dual suspension bearing performance test experiment porch |
| CN111122157B (en) * | 2019-11-26 | 2020-12-18 | 燕山大学 | Magnetic-liquid double-suspension bearing experiment table |
| CN111237340A (en) * | 2020-01-14 | 2020-06-05 | 燕山大学 | Radial electromagnetic repulsion type magnetic-liquid double-suspension bearing |
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