CN220872219U - Magnetic pole matching adjusting assembly and measuring device for measuring axial rigidity of magnetic bearing - Google Patents

Abstract

The utility model provides a magnetic pole matching and adjusting assembly for magnetic bearing axial rigidity measurement and a measuring device, which belong to the field of measurement, and specifically comprise a first cylinder, a second cylinder and a magnetic adapting mechanism, wherein the axial direction of a piece to be measured is taken as a first axis, the first cylinder is movably arranged on axial rigidity measuring equipment along the first axis, and the axis of the first cylinder is overlapped with the first axis; the second cylinder is sleeved on the periphery of the first cylinder and is in clearance fit with the first cylinder, and the second cylinder is used for being inserted into the part to be tested; the magnetic adapting mechanism comprises a first magnetic matching unit arranged on the periphery of the first cylinder body and a second magnetic matching unit arranged on the inner surface of the second cylinder body, and magnetic poles of the first magnetic matching unit and the second magnetic matching unit repel each other. The magnetic pole matching and adjusting assembly for measuring the axial rigidity of the magnetic bearing solves the problem that the existing rotor shaft measuring equipment presses the rotor shaft in the process of fixing the rotor shaft.

Description

Magnetic pole matching adjusting assembly and measuring device for measuring axial rigidity of magnetic bearing

Technical Field

The utility model belongs to the field of measurement, and particularly relates to a magnetic pole matching and adjusting assembly for measuring axial rigidity of a magnetic bearing.

Background

The rotor is a rotating body supported by a bearing. Rotors are the main rotating components in power machines and work machines. The rotor generally includes a winding coil, a core, and a rotor shaft.

The rotor shaft may be divided into a solid shaft and a cylindrical shaft according to specific usage scenarios, and a composite rotor shaft in which the solid shaft and the cylindrical shaft are combined.

The shaft bodies need to be subjected to sampling inspection before leaving the factory, and the inspection contents comprise the hardness, the toughness, the tensile strength, the compressive strength and the like of all parts of the rotor shaft,

When the existing measuring equipment is used for measuring the rotor shaft, the rotor shaft is required to be fixed, then various pushing mechanisms are adopted to apply pressure to the rotor shaft along the radial direction or the axial direction of the rotor shaft, deformation and stress in the radial direction or the axial direction of the rotor shaft are measured at the same time, calculation is carried out according to collected data, and various performance data of the rotor shaft are obtained.

However, in the process of fixing the rotor shaft, the existing test apparatus inevitably applies pressure to the radial direction or the axial direction of the rotor shaft, so that the rotor shaft (particularly, the cylindrical rotor shaft) is easily deformed due to the pressure, and the measured value of the related performance of the rotor shaft is disturbed, so that improvement is needed.

Disclosure of utility model

The utility model aims to provide a magnetic pole matching and adjusting assembly for measuring axial rigidity of a magnetic bearing, which aims to solve the technical problem that the existing rotor shaft measuring equipment has adverse effect on the measuring process of a rotor shaft due to pressing of the rotor shaft in the process of fixing the rotor shaft.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the magnetic pole matching and adjusting assembly for measuring the axial rigidity of the magnetic bearing comprises a first cylinder body, wherein the first cylinder body is movably arranged on axial rigidity measuring equipment along a first axis, and the axis of the first cylinder body is overlapped with the first axis;

The second cylinder is sleeved on the periphery of the first cylinder and is coaxially matched with the first cylinder, the periphery of the second cylinder is in clearance fit with the inner wall of the first cylinder, and the second cylinder is used for being inserted in a piece to be tested;

The magnetic adapting mechanism comprises a first magnetic matching unit arranged on the periphery of the first cylinder body and a second magnetic matching unit arranged on the inner surface of the second cylinder body, and magnetic poles of the first magnetic matching unit and the second magnetic matching unit repel each other.

Further, the first magnetic matching unit includes:

The first magnetic rings are stacked and sleeved on the outer peripheral surface of the first cylinder along the axial direction of the second cylinder;

the second magnetic matching unit comprises;

The second magnetic rings are in one-to-one correspondence with the first magnetic rings, are stacked and sleeved on the inner side surface of the second cylinder in a cylindrical shape along the axial direction of the second cylinder, and the magnetic poles on the inner side of the second magnetic rings repel with the magnetic poles on the outer side of the corresponding first magnetic rings.

Further, the magnetic pole matching adjustment assembly for measuring the axial rigidity of the magnetic bearing further comprises:

The first top pressing part is provided with a telescopic end connected with the shaft end of the first cylinder body and is used for driving the first cylinder body to move along the first axis.

Further, the first pressing part further includes:

the telescopic cylinder comprises a cylinder body fixedly arranged at a preset position and a telescopic rod with a telescopic direction parallel to the first axis, wherein the telescopic rod is connected with the first cylinder body and used for driving the first cylinder body to move along the first axis.

Further, the first pressing part further includes:

the axial direction of the flange is coincident with the axial line of the telescopic rod and the first cylinder, the two ends of the flange in the axial direction are respectively connected with the telescopic rod and the first cylinder, and the outer diameter of the flange is larger than the inner diameter of the piece to be detected.

Further, the magnetic poles of the adjacent outer peripheral surfaces of the first magnetic rings are opposite.

Further, the magnetic pole matching adjustment assembly for measuring the axial rigidity of the magnetic bearing further comprises a frame body, and the frame body comprises:

A bottom plate, the plate surface of which is parallel to a horizontal plane and perpendicular to the first axis;

The top plate and the bottom plate are arranged at intervals from top to bottom, the plate surface of the top plate is parallel to the horizontal plane and perpendicular to the first axis, the cylinder body is fixedly arranged on the top plate, and the telescopic rod is arranged on the top plate in a sliding penetrating manner;

The two ends of the guide rod are respectively connected with the top plate and the bottom plate, the axial direction of the guide rod is parallel to the first axis, and the first cylinder body moves on the guide rod in a guiding way.

Furthermore, rectangular pipes are arranged at the corners of the bottom surface of the bottom plate, and the axial direction of each rectangular pipe is parallel to the bottom surface of the bottom plate.

Further, the magnetic pole matching adjustment assembly for measuring the axial rigidity of the magnetic bearing further comprises:

The sliding connection part comprises a first connecting piece and a first linear bearing, the first linear bearing is sleeved on the guide rod, one end of the first connecting piece is fixedly connected with the telescopic rod, and the other end of the first connecting piece is connected with the first linear bearing.

Compared with the prior art, the magnetic pole matching adjusting assembly for measuring the axial rigidity of the magnetic bearing has the beneficial effects that:

Firstly, the first cylinder and the second cylinder are arranged, and after the second cylinder is inserted into the cylindrical rotor shaft, the position of a piece to be detected (namely the cylindrical rotor shaft) in the radial direction can be limited in an indirect contact mode by utilizing the repulsive magnetic poles between the first cylinder and the second cylinder, so that the problem that the rotor shaft is deformed due to compression when the rotor shaft is fixed by the conventional fixing assembly and the measurement of the rotor shaft is adversely affected can be solved.

Another object of the present utility model is to propose a measuring device provided with a pole matching adjustment assembly for measuring the axial stiffness of a magnetic bearing as described above.

The measuring device of the present utility model has all the advantages of the above magnetic pole matching adjustment assembly for measuring the axial rigidity of the magnetic bearing compared with the prior art, and is not described here.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art. In the drawings:

FIG. 1 is a three-dimensional view of a pole matching adjustment assembly for magnetic bearing axial stiffness measurement provided by the present utility model;

FIG. 2 is a three-dimensional view of the magnetic pole matching adjustment assembly for measuring axial stiffness of a magnetic bearing according to the present utility model at another view angle

FIG. 3 is an enlarged view of the area indicated at A in FIG. 1;

FIG. 4 is an enlarged view of the portion shown at B in FIG. 2;

FIG. 5 is a schematic structural view of a first trimming assembly according to the present utility model;

FIG. 6 is a schematic structural view of a second pressing portion according to the present utility model;

Fig. 7 is a schematic view of magnetic pole distribution between a first cylinder and a second cylinder according to the present utility model.

In the figure:

1. An axial measuring mechanism; 11. a first positioning portion; 111. positioning a tray; 1110. a second avoidance through hole; 112. a telescoping member; 12. a first pressing part; 121. a first cylinder; 122. a second cylinder; 123. a flange plate; 124. a telescopic cylinder; 1241. a cylinder; 1242. a telescopic rod; 13. a first force sensor; 14. a first displacement sensor; 15. a first trimming assembly; 151. a first screw; 152. a second screw; 153. a connecting sleeve; 154. an operation lever;

2. A radial measuring mechanism; 21. a second positioning portion; 22. a second pressing part; 221. a top block; 222. a drive assembly; 2221. a fixing seat; 2222. a connecting block; 2223. a driving rod; 223. a second trimming assembly; 2231. an adjusting shaft; 23. a second force sensor; 24. a second displacement sensor;

3. A frame body; 31. a bottom plate; 32. a top plate; 33. a guide rod;

4. A sliding connection part; 41. a first connector; 42. a first linear bearing; 43. a second connector; 44. a second linear bearing; 45. a third connecting member; 450. a third avoidance through hole;

5. And a piece to be tested.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an azimuth or a positional relationship such as "upper", "lower", "inner", "back", and the like are presented, they are based on the azimuth or the positional relationship shown in the drawings, only for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection may be a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

Referring to fig. 1 to 7 together, a description will now be given of a magnetic pole matching adjustment assembly for measuring axial stiffness of a magnetic bearing according to the present utility model.

The magnetic pole matching and adjusting assembly for measuring the axial rigidity of the magnetic bearing comprises a first cylinder 121, wherein the axial direction of a piece 5 to be measured is taken as a first axis, the first cylinder 121 is movably arranged on axial rigidity measuring equipment along the first axis, and the axis of the first cylinder 121 is overlapped with the first axis; the second cylinder 122 is sleeved on the periphery of the first cylinder 121 and is coaxially matched with the first cylinder 121, the periphery of the second cylinder 122 is in clearance fit with the inner wall of the first cylinder 121, and the second cylinder 122 is used for being inserted into the to-be-detected piece 5; the magnetic adapting mechanism comprises a first magnetic matching unit arranged on the periphery of the first cylinder 121 and a second magnetic matching unit arranged on the inner surface of the second cylinder 122, wherein magnetic poles of the first magnetic matching unit and the second magnetic matching unit repel each other.

Compared with the prior art, the magnetic pole matching adjusting assembly for measuring the axial rigidity of the magnetic bearing has the beneficial effects that:

First, according to the present utility model, the first cylinder 121 and the second cylinder 122 are provided, and after the second cylinder 122 is inserted into the cylindrical rotor shaft, the position of the workpiece 5 to be measured, i.e., the radial direction of the cylindrical rotor shaft, can be defined by using the magnetic poles that repel each other between the first cylinder 121 and the second cylinder 122, so that the problem that the conventional fixing assembly deforms the rotor shaft due to compression when fixing the rotor shaft, and adversely affects the measurement of the rotor shaft can be solved.

In some embodiments, the first magnetic matching unit includes a first magnetic ring, the second magnetic matching unit includes a plurality of second magnetic rings, and the plurality of second magnetic rings are stacked and sleeved on the outer peripheral surface of the first cylinder 121 in a cylindrical shape along the axial direction of the second cylinder 122; the second magnetic matching units comprise a plurality of second magnetic rings, the second magnetic rings are in one-to-one correspondence with the first magnetic rings, each second magnetic ring is stacked and sleeved on the inner side surface of the second cylinder 122 in a cylinder shape along the axial direction of the second cylinder 122, and the magnetic poles on the inner side of the second magnetic rings repel with the magnetic poles on the outer side of the corresponding first magnetic rings.

In the implementation process, the first cylinder 121 and the second cylinder 122 can be kept coaxial by the repulsion of the magnetism of the first magnetic ring and the second magnetic ring, and the cylindrical rotor shaft of the to-be-detected piece 5 in the axial rigidity measuring device is positioned in a non-contact positioning mode, so that the problem that the detection data of the to-be-detected piece 5 is adversely affected due to the fact that the to-be-detected piece 5 is extruded in the process of fixing the to-be-detected piece 5 by the existing contact positioning structure is solved.

In some embodiments, the magnetic pole matching adjustment assembly for magnetic bearing axial stiffness measurement further comprises a first top pressure portion 12, the first top pressure portion 12 having a telescoping end connected to the shaft end of the first cylinder 121, the first top pressure portion 12 for driving the first cylinder 121 to move along the first axis.

In this embodiment, the first cylinder 121 can be driven to move along the first axis by the extension and contraction of the extension end, so that the first cylinder 121 can be inserted into the second cylinder 122, and the first magnetic ring on the first cylinder 121 can repel the second magnetic ring on the second cylinder 122, so as to facilitate the non-contact fixation of the to-be-tested piece 5.

In some embodiments, to drive the first cylinder 121 to move along the first axis, the first pressing part 12 further includes a telescopic cylinder including a cylinder 1241 fixed at a predetermined position and a telescopic rod 1242 having a telescopic direction parallel to the first axis, the telescopic rod 1242 being connected to the first cylinder 121 for driving the first cylinder 121 to move along the first axis.

In some embodiments, to facilitate the installation of the first cylinder 121 at the end of the telescopic rod 1242, the first pressing portion 12 further includes a flange 123, the axial direction of the flange 123 coincides with the axial directions of the telescopic rod 1242 and the first cylinder 121, two axial ends of the flange 123 are respectively connected to the telescopic rod 1242 and the first cylinder 121, and the outer diameter of the flange 123 is larger than the inner diameter of the workpiece 5 to be measured.

The flange 123 in this embodiment not only can form the connection between the first cylinder 121 and the telescopic rod 1242, but also can prevent the first cylinder 121 from extending too far into the second cylinder 122 by utilizing the characteristic that the outer diameter of the first cylinder is larger than that of the to-be-measured piece 5, so that the structural arrangement of the magnetic pole matching and adjusting assembly for measuring the axial rigidity of the magnetic bearing is more reasonable.

In some embodiments, to make the magnetic fit between the first cylinder 121 and the second cylinder 122 more reasonable, the poles of the outer circumferential surfaces of adjacent first magnetic rings are opposite.

In detail, the magnetic poles of the outer circumference of each first magnetic ring on the first cylinder 121 are alternately arranged with N poles and S poles, correspondingly, the outer surface of the second magnetic ring alternately arranged in the up-down direction on the inner surface of the second cylinder 122 is provided with N poles corresponding to the N poles and S poles corresponding to the S poles in the first cylinder 121,

In some embodiments, to guide the movement of the first cylinder 121 on the first path, the magnetic pole matching adjustment assembly for magnetic bearing axial stiffness measurement further includes a frame body 3, the frame body 3 including a bottom plate 31, a top plate 32, and a guide rod 33, wherein the plate surface of the bottom plate 31 is parallel to the horizontal plane and perpendicular to the first axis; roof 32 and low board are from last interval setting down, and the face of roof 32 is on a parallel with the horizontal plane and perpendicular to first axis, and cylinder body 1241 sets firmly in roof 32, and telescopic link 1242 slides and wears to locate roof 32: the two ends of the guide rod 33 are respectively connected with the top plate 32 and the bottom plate 31, the axial direction of the guide rod 33 is parallel to the first axis, and the first cylinder 121 moves on the guide rod 33 in a guiding way.

In some embodiments, in order to prevent the bottom plate 31 of the frame body 3 from being inconvenient to place due to uneven placement plane, rectangular pipes are arranged at corners of the bottom surface of the bottom plate 31, and the axial direction of each rectangular pipe is parallel to the bottom surface of the bottom plate 31.

In some embodiments, the magnetic pole matching adjustment assembly for measuring the axial stiffness of the magnetic bearing further comprises a sliding connection part 4, the sliding connection part 4 comprises a first connecting piece 41 and a first linear bearing 42, the first linear bearing 42 is sleeved on the guide rod 33, one end of the first connecting piece 41 is fixedly connected with the telescopic rod 1242, and the other end of the first connecting piece 41 is connected with the first linear bearing 42.

In this embodiment, by providing the first linear bearing 42 and the first connecting member 41, the first cylinder 121 can be guided to move on the guide rod 33, so as to guide the movement of the first cylinder 121 and prevent the first cylinder 121 from generating radial offset during the process of inserting the second cylinder 122.

Another object of the present utility model is to propose a measuring device provided with a pole matching adjustment assembly for measuring the axial stiffness of a magnetic bearing as above.

The measuring device of the present utility model has all the advantages of the above magnetic pole matching adjustment assembly for measuring the axial rigidity of the magnetic bearing compared with the prior art, and is not described here.

In addition, the measuring device also comprises an axial measuring mechanism 1 and a radial measuring mechanism 2 which are arranged on the frame body 3; the axial measuring mechanism 1 comprises a first positioning part 11, a first force sensor 13 and a first displacement sensor 14 which are all arranged on the frame body 3, wherein the first jacking part 12 and the first positioning part 11 are sequentially arranged on the frame body 3 at intervals from top to bottom, the first force sensor 13 corresponds to the first positioning part 11, and the first displacement sensor 14 corresponds to the first jacking part 12; the radial measuring mechanism 2 comprises a second positioning part 21, a second jacking part 22, a second force sensor 23 and a second displacement sensor 24 which are arranged on the frame body 3 and are positioned between the first positioning part 11 and the first jacking part 12, and the second positioning part 21 and the second jacking part 22 are arranged on the frame body 3 at intervals along the horizontal direction and are respectively positioned on two radial sides of the piece to be measured 5; the second pressing part 22 comprises a pressing block 221 which is arranged on the frame body 3 and can be close to or far from the second positioning part 21 along the radial direction of the piece 5 to be measured, and the second force sensor 23 is arranged on the second pressing part 22 and is used for sensing the pressing force of the second pressing part 22 on the piece 5 to be measured; the second displacement sensor 24 is disposed between the frame 3 and the second positioning member and the second pressing portion 22, and is configured to sense deformation of the workpiece 5 in the radial direction.

More specifically, in the present embodiment, the member 5 to be measured is generally a cylindrical rotor shaft, or a rotor shaft with one end being cylindrical, so that the second cylinder 122 can be inserted into the cylindrical rotor shaft to be measured, and at this time, the cylindrical rotor shaft can maintain its positioning in the axial direction by utilizing magnetic repulsion between the first cylinder 121 and the second cylinder 122.

In addition, as for the pressing process of the first pressing portion 12 on the cylindrical rotor shaft, referring to fig. 3 and 7, a first magnetic matching unit is formed on the outer peripheral surface of the first cylinder 121, the first magnetic matching unit includes N poles and S poles alternately arranged in the up-down direction, correspondingly, N poles corresponding to the N poles in the first cylinder 121 and S poles corresponding to the S poles are alternately arranged in the up-down direction on the inner surface of the second cylinder 122, when the same magnetic poles in the first cylinder 121 and the second cylinder 122 are in one-to-one correspondence in the horizontal direction, the first cylinder 121 and the second cylinder 122 are kept coaxial due to magnetic repulsion, at this time, when the axial rigidity of the cylindrical rotor shaft needs to be detected, the first cylinder 121 is moved upward in the vertical direction, so that the second cylinder 122 is subjected to downward repulsive force, and further, the embodiment can press the cylindrical rotor shaft by pressing the second cylinder 122, thereby measuring the axial rigidity of the cylindrical rotor shaft.

Compared with the prior art, the embodiment has the following beneficial effects:

First, according to the present utility model, the first cylinder 121 and the second cylinder 122 are provided, and after the second cylinder 122 is inserted into the cylindrical rotor shaft, the position of the workpiece 5 to be measured (i.e., the cylindrical rotor shaft) in the radial direction can be defined by using the magnetic poles that repel each other between the first cylinder 121 and the second cylinder 122, so that the problem that the conventional fixing assembly deforms the rotor shaft due to compression when fixing the rotor shaft, and adversely affects the measurement of the rotor shaft can be solved.

Secondly, by arranging the axial measuring mechanism 1, the first force sensor 13 and the first displacement sensor 14 can measure corresponding values in the process of extruding the cylindrical rotor shaft by the first cylinder 121, so that a measurer or measuring equipment can measure the axial rigidity of the cylindrical rotor shaft according to the values.

Similarly, according to the utility model, by arranging the radial measuring mechanism 2, the top head of the second top pressing part 22 extrudes the cylindrical rotor shaft in the process of approaching the second positioning part 21, so that the cylindrical rotor shaft deforms, and the second force sensor 23 and the second displacement sensor 24 sense the radial stress condition and deformation of the cylindrical rotor shaft, thereby being beneficial to measuring personnel or measuring equipment to measure the radial rigidity of the cylindrical rotor shaft according to the sensed value.

It should be noted that, in some specific usage scenarios, the top of the part to be tested 5 (cylindrical rotor shaft) is kept coaxial with other structures in a magnetic adaptation manner after magnetizing, so the first cylinder 121 in this embodiment may also be directly inserted into the magnetic rotor shaft with the end magnetized, meanwhile, in this case, the distribution of the magnetic poles on the outer surface of the first cylinder 121 and the adaptation of the magnetic poles on the inner wall of the rotor magnetic rotor shaft may be referred to above, and the specific testing process for the axial stiffness and the radial stiffness of the magnetic rotor shaft is the same as above, which is not tired here.

In some embodiments, as shown in fig. 1 and 2 in detail, the first displacement sensor 14 is provided on the top plate 32, the first positioning portion 11 and the first force sensor 13 are provided on the bottom plate 31, and the second positioning portion 21, the second pressing portion 22, the second force sensor 23 and the second displacement sensor 24 are all slidably fitted to the guide rod 33.

More specifically, the quantity of guide bar 33 is three, and each guide bar 33 is triangular prism shape and arranges, and roof 32 and bottom plate 31 that the top and bottom both ends set up can fix the relative position of each guide bar 33, and then can utilize triangle-shaped's stability to promote the structural strength of support body 3, prevent that support body 3 from rocking.

In addition, in the present embodiment, the guide rod 33 is provided, so that the movement of each member on the frame 3 can be guided.

In some embodiments, not shown in the drawings, the axial measurement mechanism 1 further includes a first fine adjustment assembly 15 disposed between the telescopic rod 1242 and the flange 123, the first fine adjustment assembly 15 includes a first screw 151, a second screw 152, a connection sleeve 153 and an operation rod 154, the first screw 151, the second screw 152, the connection sleeve 153, the telescopic rod 1242 and the flange 123 are coaxial, the first screw 151 is disposed at an end of the telescopic rod 1242, a first thread is formed at an outer periphery, the second screw 152 is disposed at the flange 123, a second thread having a direction opposite to that of the first thread is formed at an outer periphery, upper and lower ends of the connection sleeve 153 are respectively in thread fit with the first screw 151 and the second screw 152, an axis of the operation rod 154 is perpendicular to an axis of the connection sleeve 153, and the operation rod 154 is disposed at a middle of the connection sleeve 153.

Compared to the prior art, the first trimming assembly 15 in the present embodiment can adjust the axial distance between the first screw 151 and the second screw 152 by rotating the connecting sleeve 153, and in this process, the first screw 151 is fixedly connected with the telescopic rod 1242, so that the flange 123 moves up and down along with the rotation of the second screw 152 to drive the connecting sleeve 153 to move along the axial direction of the telescopic rod 1242. In the above adjustment process, the first fine adjustment component 15 can more accurately adjust the position of the first cylinder 121 in the up-down direction by using the characteristics of high thread adaptation precision and self-locking effect, so as to improve the measurement precision of the piece 5 to be measured.

In addition to the above possible embodiments, the first fine tuning assembly 15 further includes another alternative embodiment, in detail, referring to fig. 5, the first fine tuning assembly 15 includes a connecting sleeve 153, a first screw 151 and a second screw 152 fixedly installed at two axial ends of the connecting sleeve 153, and the connecting sleeve 153, the external threads of the first screw 151 and the second screw 152 are opposite in rotation direction, the first screw 151, the second screw 152 and the connecting sleeve 153 are coaxially arranged, a connecting ring in threaded fit with the first screw 151 is fixedly installed in the middle of the first connecting member 41 corresponding to the first screw 151, the connecting ring is fixedly connected with the telescopic rod 1242, a threaded hole in threaded fit with the second screw 152 is provided in the middle of the flange 123, so that by rotating the connecting sleeve 153, the flange 123 can be driven to approach or separate from the first connecting member 41, and further, the first cylinder 121 is driven to move along the up-down direction by moving the flange 123.

In some embodiments, as shown in fig. 1-4, the sliding connection 4 further includes a second connection 43 and a second linear bearing 44; the first screw 151 is fixedly connected with the telescopic rod 1242 through the first connecting piece 41; the second linear bearing 44 is sleeved on the guide rod 33, the middle part of the second connecting piece 43 is fixedly connected with the flange 123, and the edge part of the second connecting piece 43 is connected to the outer peripheral surface of the second linear bearing 44.

In a specific implementation process, the first connecting piece 41 is in a strip shape, the second connecting piece 43 includes three connecting strips that are connected in a closing manner, before the telescopic rod 1242 moves downward in the radial measuring mechanism 2, the to-be-measured piece 5 is transferred onto the first positioning portion 11 on the bottom plate 31 by a tool such as a forklift, and then the first positioning piece and the first cylinder 121 are close to each other, so that the to-be-measured piece 5 is positioned in the frame 3.

Compared with the prior art, the present embodiment can utilize the rolling fit between the first linear bearing 42 and the guide rod 33 to make the guiding movement of the first cylinder 121 on the frame body 3 smoother and more accurate by providing the first linear bearing 42.

In some embodiments, the first positioning portion 11 includes a positioning tray 111 movably disposed in the middle of the bottom plate 31 along the axial direction of the guide rod 33, the disc surface of the positioning tray 111 is parallel to the disc surface of the bottom plate 31, the first force sensor 13 is disposed in the middle of the bottom plate 31, and the middle of the positioning tray 111 is provided with a second avoidance through hole 1110 corresponding to the first force sensor 13.

In a specific implementation process of the embodiment, the positioning tray 111 may be mounted on the bottom plate 31 by using a telescopic cylinder, and a telescopic direction of the telescopic cylinder is perpendicular to a plate surface of the bottom plate 31; in this embodiment, the devices such as a forklift are placed on the positioning tray 111, so that the positioning tray 111 drives the cylindrical rotor shaft to move downwards under the action of the telescopic cylinder, and the bottom of the cylindrical rotor shaft abuts against the first force sensor 13, so as to detect the axial stress condition of the cylindrical rotor shaft.

Compared with the prior art, the positioning tray 111 in this embodiment can support the cylindrical rotor shaft conveyed by the forklift, so as to prevent the cylindrical rotor shaft from directly colliding with the first force sensor 13 when conveyed into the frame 3.

In some embodiments, the sliding connection portion 4 further includes a third connecting piece 45, the third connecting piece 45 is slidably connected to the guide rod 33 along the axial direction of the guide rod 33, the second positioning portion 21, the second top pressing portion 22, the second force sensor 23 and the second displacement sensor 24 are all disposed on the third connecting piece 45, and along the axial direction of the guide rod 33, the third connecting piece 45 is connected to one end, far away from the first linear bearing 42, of the second linear bearing 44, the edge portion of the third connecting piece 45 is fixedly connected with the second linear bearing 44, and a third avoidance through hole 450 adapted to the to-be-measured piece 5 is formed in the middle of the third connecting piece 45.

In this embodiment, the mounting position of each component in the radial measuring mechanism 2 on the frame body 3 is more reasonable by setting the third connecting piece 45, in addition, through the second avoidance through hole 1110 formed in the middle of the third connecting piece 45, after the piece 5 to be measured (the cylindrical rotor shaft) is placed on the positioning tray 111, the third connecting piece 45 can descend to the preset position by using the second avoidance through hole 1110, so that the radial rigidity of the cylindrical rotor shaft can be conveniently detected by the radial measuring mechanism 2.

In some embodiments, in order to drive the top block 221 to press the part 5 to be tested, the second pressing portion 22 includes a driving assembly 222 for driving the top block 221 to move, the driving assembly 222 includes a fixing base 2221, a connecting block 2222 and a driving rod 2223, the fixing base 2221 is fixed on the third connecting piece 45, the connecting block 2222 is slidably disposed on the fixing base 2221 along an axis of the driving rod 2223, the top block 221 is disposed on the connecting block 2222, the driving rod 2223 is rotatably disposed on the fixing base 2221 with its own axis as a rotation center, a shaft body of the driving rod 2223 is in threaded fit with the fixing base 2221, and an end of the driving rod 2223 is rotationally connected with the connecting block 2222.

It should be noted that, the driving rod 2223 is connected to the connection block 2222 through a bearing, so that the driving rod 2223 and the connection block 2222 can maintain synchronous displacement along the axial direction of the driving rod 2223; so set up, this embodiment utilizes the screw adaptation of actuating lever 2223 and fixing base 2221, can make actuating lever 2223 along self axial displacement through actuating lever 2223's rotation, and then utilizes actuating lever 2223's axial displacement to drive connecting block 2222 and remove.

Optionally, for the driving assembly 222, a connection bearing capable of locking the axial displacement of the driving rod 2223 is included, an external thread is formed on the outer surface of the driving rod 2223, an internal thread adapted to the thread of the driving rod 2223 is formed in the connection block 2222, and a plug is connected to the connection block 2222. So set up, through rotating actuating lever 2223, can utilize the screw thread adaptation of connecting block 2222 and actuating lever 2223 to order about the plug along actuating lever 2223's axial displacement, and then make the plug radially oppress the outer wall of piece 5 that awaits measuring along the piece 5 that awaits measuring to survey the piece 5 axial direction rigidity that awaits measuring.

In some embodiments, in order to more precisely adjust the position of the top block 221 in the axial direction of the driving rod 2223, a second fine adjustment assembly 223 is disposed between the top block 221 and the connecting block 2222, the second fine adjustment assembly 223 includes an adjustment shaft 2231, the rotation axis of the adjustment shaft 2231 is parallel to the axis of the driving rod 2223, the adjustment shaft 2231 is fixedly connected with an adjustment screw coaxially, and two axial ends of the adjustment screw protrude from the axial ends of the adjustment shaft 2231 and are respectively in threaded connection with the top block 221 and the connecting block 2222.

In some embodiments, in order to adjust the position of the positioning tray 111 in the vertical direction, the first positioning portion 11 includes a telescopic member 112 provided on the bottom plate 31, the telescopic direction of the telescopic member 112 is parallel to the axial direction of the guide rod 33, and two ends of the telescopic member 112 are sequentially connected to the positioning tray 111 and the bottom plate 31 from top to bottom, and the number of the telescopic members 112 is 3 and uniformly arranged in the horizontal direction around the axis of the telescopic rod 1242.

Compared with the prior art, the position of the positioning tray 111 in the vertical direction can be adjusted by using the expansion and contraction of the expansion and contraction member 112 by arranging the expansion and contraction member 112, so that the piece 5 to be measured reaches the predetermined position, and the rigidity of the piece 5 to be measured in the axial direction and the radial direction can be conveniently detected.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (10)

1. A pole matching adjustment assembly for magnetic bearing axial stiffness measurement, comprising:

a first cylinder (121) movably provided along a first axis to the axial rigidity measuring device, and an axis of the first cylinder (121) coincides with the first axis;

The second cylinder (122) is sleeved on the periphery of the first cylinder (121) and is coaxially matched with the first cylinder (121), the periphery of the second cylinder (122) is in clearance fit with the inner wall of the first cylinder (121), and the second cylinder (122) is used for being inserted into the part to be tested (5);

The magnetic adapting mechanism comprises a first magnetic matching unit arranged on the periphery of the first cylinder body (121) and a second magnetic matching unit arranged on the inner surface of the second cylinder body (122), and magnetic poles of the first magnetic matching unit and the second magnetic matching unit repel each other.

2. The pole matching adjustment assembly for magnetic bearing axial stiffness measurement of claim 1, wherein the first magnetic mating unit includes:

The first magnetic rings are stacked and sleeved on the outer peripheral surface of the first cylinder (121) along the axial direction of the second cylinder (122);

the second magnetic matching unit comprises;

The second magnetic rings are in one-to-one correspondence with the first magnetic rings, are stacked and sleeved on the inner side surface of the second cylinder (122) in a cylindrical shape along the axial direction of the second cylinder (122), and the magnetic poles on the inner side of the second magnetic rings repel with the magnetic poles on the outer side of the corresponding first magnetic rings.

3. The magnetic pole matching adjustment assembly for measuring axial stiffness of a magnetic bearing of claim 1, further comprising:

And the first jacking part (12) is provided with a telescopic end connected with the shaft end of the first cylinder body (121), and the first jacking part (12) is used for driving the first cylinder body (121) to move along the first axis.

4. A pole matching adjustment assembly for magnetic bearing axial stiffness measurement according to claim 3, characterized in that the first pressing part (12) further comprises:

The telescopic cylinder comprises a cylinder body (1241) fixedly arranged at a preset position and a telescopic rod (1242) with a telescopic direction parallel to the first axis, wherein the telescopic rod (1242) is connected with the first cylinder body (121) and is used for driving the first cylinder body (121) to move along the first axis.

5. The magnetic pole matching adjustment assembly for magnetic bearing axial stiffness measurement of claim 4, wherein the first pressing portion (12) further comprises:

The flange plate (123), the axial of flange plate (123) with telescopic link (1242) with the axis coincidence of first barrel (121), the axial both ends of flange plate (123) are connected respectively telescopic link (1242) with first barrel (121), just the external diameter of flange plate (123) is greater than the internal diameter of piece (5) await measuring.

6. The magnetic pole matching adjustment assembly for measuring axial stiffness of a magnetic bearing according to claim 2, wherein adjacent ones of the first magnetic rings have opposite magnetic poles.

7. The magnetic pole matching adjustment assembly for magnetic bearing axial rigidity measurement according to claim 4, characterized in that the magnetic pole matching adjustment assembly for magnetic bearing axial rigidity measurement further comprises a frame body (3), the frame body (3) comprising:

-a bottom plate (31), the plate surface of the bottom plate (31) being parallel to a horizontal plane and perpendicular to the first axis;

The top plate (32) and the bottom plate (31) are arranged at intervals from top to bottom, the plate surface of the top plate (32) is parallel to the horizontal plane and perpendicular to the first axis, the cylinder body (1241) is fixedly arranged on the top plate (32), and the telescopic rod (1242) is slidably arranged on the top plate (32);

The two ends of the guide rod (33) are respectively connected with the top plate (32) and the bottom plate (31), the axial direction of the guide rod (33) is parallel to the first axis, and the first cylinder (121) moves on the guide rod (33) in a guiding way.

8. The magnetic pole matching adjustment assembly for magnetic bearing axial rigidity measurement according to claim 7, wherein rectangular pipes are provided at corner portions of the bottom surface of the bottom plate (31), and the axial direction of each rectangular pipe is parallel to the bottom surface of the bottom plate (31).

9. The magnetic pole matching adjustment assembly for measuring axial stiffness of a magnetic bearing of claim 7, further comprising:

the sliding connection part (4) comprises a first connecting piece (41) and a first linear bearing (42), wherein the first linear bearing (42) is sleeved on the guide rod (33), one end of the first connecting piece (41) is fixedly connected with the telescopic rod (1242), and the other end of the first connecting piece is connected with the first linear bearing (42).

10. A measuring device provided with a pole matching adjustment assembly for measuring the axial stiffness of a magnetic bearing as claimed in any one of claims 1 to 9.