A mounting skeleton, a monolithic stator, and a method for potting a monolithic stator

Abstract

The application provides a mounting framework, a whole stator and a potting method of the whole stator, and belongs to the technical field of stator potting. The mounting framework comprises a framework body in a circular tube shape; and a plurality of positioning hole groups are arranged along the axial direction of the framework body at intervals, and each positioning hole group comprises a plurality of positioning holes corresponding to the stator teeth and arranged along the circumferential direction of the framework body at intervals. In the application, the axial intervals between the positioning hole groups determine the axial spacing of the plurality of stators, and the repeated adjustment of the stator is avoided by adding gaskets. The positioning holes in each positioning hole group are arranged along the circumferential direction of the framework body at intervals, and the relative circumferential positions of the stators are determined, so that the circumferential adjustment and alignment of the stator are avoided. The structure of the mounting framework facilitates and accelerates the axial and circumferential positioning of the stator, and reduces the installation workload.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of stator potting, in particular to an installation framework, a whole stator and a potting method of the whole stator. BACKGROUND

[0002] The magnetic suspension molecular pump utilizes a magnetic suspension motor to realize the speed control of a molecular pump rotor assembly, and the stator of the magnetic suspension motor includes an upper radial magnetic bearing stator, a motor stator and a lower radial magnetic bearing stator. Each stator and internal sensor need to be potted into a whole structure by using epoxy glue.

[0003] Before the stator is potted, the axial and circumferential positions of each stator need to be adjusted and positioned. At present, the specific adjustment method is as follows: the upper radial magnetic bearing stator, the motor stator, the lower radial magnetic bearing stator and the sensor are placed into the packaging shell, and the axial spacing thereof is adjusted by adding a gasket ring between each stator and the sensor, and the circumferential position is adjusted by aligning the circumferential positioning holes of each stator and the sensor. The above adjustment method is complicated and has a large amount of work. SUMMARY

[0004] Therefore, the technical problem to be solved by the present application is to overcome the defect that the adjustment and positioning method between the magnetic bearing stator and the motor stator in the prior art is complicated, so as to provide an installation framework which can conveniently position the axial and circumferential positions of the stator.

[0005] The present application also provides a whole stator with the above installation framework and a potting method of the whole stator.

[0006] In order to solve the above technical problem, the present application provides an installation framework, which comprises:

[0007] a framework body in the shape of a circular tube;

[0008] a plurality of positioning hole groups which are arranged along the axial direction of the framework body, and each positioning hole group has a plurality of positioning holes corresponding to the teeth of the stator and arranged along the circumferential direction of the framework body.

[0009] As a preferred scheme, the framework body is composed of a plurality of framework units which are spliced together.

[0010] As a preferred scheme, the splicing surfaces between the plurality of framework units are parallel to the axis of the framework body.

[0011] As a preferred scheme, the splicing surfaces between the plurality of framework units are perpendicular to the axis of the framework body, and the splicing surfaces divide the positioning holes in the positioning hole groups into two parts.

[0012] As a preferred solution, the positioning hole group comprises a first positioning hole group, a second positioning hole group and a third positioning hole group which are sequentially and spacedly arranged along the axial direction of the skeleton body, and the positioning holes in the first positioning hole group and the third positioning hole group are arranged in one-to-one correspondence.

[0013] As a preferred solution, the installation skeleton further comprises:

[0014] A sensor mounting hole group is arranged on the skeleton body, and the sensor mounting hole group has two groups which are arranged at two ends of the skeleton body, and each group has a plurality of mounting holes which are spacedly arranged along the circumferential direction of the skeleton body.

[0015] The application provides a whole stator, comprising:

[0016] The installation skeleton according to any one of the above solutions;

[0017] A stator group has a plurality of stators which are arranged in the positioning hole group of the installation skeleton, and the stators have stator teeth which protrude towards the center direction and are embedded in the stator holes of the stator hole group.

[0018] As a preferred solution, the stator group comprises an upper radial magnetic bearing stator, a lower radial magnetic bearing stator and a motor stator, and the motor stator is located between the upper radial magnetic bearing stator and the lower radial magnetic bearing stator.

[0019] As a preferred solution, the installation skeleton further comprises:

[0020] A sensor group has two groups which are arranged at two ends of the skeleton body.

[0021] The application provides a potting method of the whole stator, comprising the following steps:

[0022] Step 1: the installation skeleton according to any one of claims 1-6 is used to embed the upper radial magnetic bearing stator, the motor stator and the lower radial magnetic bearing stator into one whole body, the stator shell is sleeved outside the whole body, the mandrel is inserted into the axial center of the installation skeleton, and the stator shell and the mandrel together form a to-be-potted assembly;

[0023] Step 2: epoxy glue is poured between the installation skeleton and the stator shell of the to-be-potted assembly;

[0024] Step 3: after the epoxy glue is cooled, the mandrel is demolded.

[0025] The application provides a door lock, comprising the installation structure according to any one of the above solutions.

[0026] The application provides a door lock installation method, which fixes the door lock on the door plate through the installation structure, and comprises the following steps:

[0027] The technical scheme of the present application has the following advantages:

[0028] 1. The mounting skeleton provided by the present application, the axial direction of the skeleton body is provided with a plurality of positioning hole groups at intervals, the axial interval between the positioning hole groups is fixed and unchangeable, the axial spacing of the plurality of stators is determined at one time, and repeated adjustment by adding gaskets is avoided; the positioning holes in each positioning hole group are arranged at intervals along the circumferential direction of the skeleton body, the relative circumferential positions of the stators are determined at one time, and repeated circumferential adjustment and alignment of the stators are avoided; the structure of the mounting skeleton makes the axial and circumferential positioning of the stators convenient and fast, and reduces the installation workload.

[0029] 2. The mounting skeleton provided by the present application, the skeleton body is a splicing structure of a plurality of skeleton units, so that the stator is easily and conveniently mounted on the skeleton body, and deformation of the skeleton body is avoided.

[0030] 3. The mounting skeleton provided by the present application, the sensor mounting hole group is arranged, so that the mounting spacing between the sensor and the stator is fixed, and the measurement accuracy of the sensor is facilitated to be ensured.

[0031] 4. The integral stator provided by the present application has the advantages of any one of the mounting skeletons described in the above schemes.

[0032] 5. The pouring method of the integral stator provided by the present application, the mounting skeleton realizes one-time axial and circumferential positioning of each stator, and repeated adjustment is avoided; in the pouring process, the mandrel not only plays a supporting and assisting role, but also can be used for centering adjustment of each stator, and the coaxiality of each stator is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the specific embodiments of the present application or the technical scheme in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0034] Figure 1 It is a perspective view of the mounting skeleton provided in the present application.

[0035] Figure 2 It is an exploded view of the mounting skeleton provided in the first embodiment of the present application.

[0036] Figure 3 It is an exploded view of the mounting skeleton provided in the second embodiment of the present application.

[0037] Figure 4The schematic diagram of the three-dimensional structure of the integral stator provided in the present application.

[0038] Figure 5 The schematic diagram of the matching relationship between the integral stator and the mandrel.

[0039] Figure 6 The schematic diagram of the matching relationship between the mounting framework and the mandrel.

[0040] Explanation of reference signs:

[0041] 1, mounting framework; 2, framework body; 3, sensor mounting hole group; 4, first positioning hole group; 5, second positioning hole group; 6, third positioning hole group; 7, framework unit; 8, upper radial magnetic bearing stator; 9, lower radial magnetic bearing stator; 10, motor stator; 11, sensor group; 12, mandrel; 13, gap; 14, stator shell. DETAILED DESCRIPTION

[0042] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0043] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0044] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connecting” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0045] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0046] Example 1

[0047] The mounting skeleton provided in the embodiment comprises a skeleton body 2 and a positioning hole group.

[0048] As shown in Figure 1 , the skeleton body 2 is a hollow cylinder in a circular tube shape, and the skeleton body 2 is provided with a positioning hole group and a sensor mounting hole group 3 in the axial direction; the sensor mounting hole group 3 has two groups, which are respectively arranged near the end of the skeleton body 2; each of the sensor mounting hole groups 3 has four mounting holes, and the four mounting holes are spaced and uniformly distributed along the circumferential direction of the skeleton body 2; each of the mounting holes is a circular hole and is in communication with the inside of the skeleton body 2. The positioning hole group is arranged between the two sensor mounting hole groups 3, and the positioning hole group comprises a first positioning hole group 4, a second positioning hole group 5 and a third positioning hole group 6 which are sequentially and spaced arranged in the axial direction of the skeleton body 2; the positioning holes in each of the positioning hole groups are rectangular holes and are in communication with the inside of the skeleton body 2, wherein the positioning holes in the first positioning hole group 4 and the third positioning hole group 6 are arranged one by one.

[0049] As shown in Figure 2 , the skeleton body 2 is composed of two skeleton units 7, and the splicing surfaces of the two skeleton units 7 are parallel to the axis of the skeleton body 2; the synchronous positioning of each stator is realized: after each stator is positioned with one of the skeleton units 7, the remaining skeleton unit 7 is correspondingly spliced to avoid deformation of the skeleton body 2 due to extrusion.

[0050] As an alternative embodiment, as shown in Figure 3 , the skeleton body 2 is composed of four skeleton units 7, and the splicing surfaces of the four skeleton units 7 are perpendicular to the axis of the skeleton body 2, and the splicing surfaces divide the positioning holes in the first positioning hole group 4, the second positioning hole group 5 and the third positioning hole group 6 into two parts; the sequential positioning of each stator is realized: the stator is placed between two skeleton units 7, and the stator teeth of the stator are inserted into the positioning holes in alignment.

[0051] Embodiment 2

[0052] The integral stator provided in the embodiment comprises a mounting skeleton 1, an upper radial magnetic bearing stator 8, a lower radial magnetic bearing stator 9, a motor stator 10 and two groups of sensor groups 11.

[0053] As shown in Figure 4As shown, each sensor group 11 includes a sensor and a mounting bracket. The mounting bracket has a circular structure with four threaded holes evenly distributed around its circumference. Each sensor group 11 has four sensors, which are respectively fixed to the mounting bracket through the threaded holes. First, the mounting bracket is fitted onto the frame body 2, so that the sensors correspond one-to-one with the sensor mounting holes. Then, the distance of each sensor extending beyond the sensor mounting hole is adjusted sequentially. The upper radial magnetic bearing stator 8 is mounted on the frame body 2 through the first positioning hole group 4, and the lower radial magnetic bearing stator 9 is mounted on the frame body 2 through the third positioning hole group 6. The motor stator 10 is mounted on the frame body 2 through the second positioning hole group 5 and is located between the upper radial magnetic bearing stator 8 and the lower radial magnetic bearing stator 9.

[0054] Example 3

[0055] The potting method for the integral stator in this embodiment includes the following steps:

[0056] Step 1: As Figure 5 As shown, the upper radial magnetic bearing stator 8, the motor stator 10, the lower radial magnetic bearing stator 9, and the two sets of sensor groups 11 are respectively embedded in the mounting frame 1 to form a whole; the stator housing 14 is fitted on the outside of the whole, and the mandrel 12 is inserted into the axis of the mounting frame 1 to form a potting assembly.

[0057] like Figure 6 As shown, the inner diameters of the upper radial magnetic bearing stator 8, the motor stator 10, and the lower radial magnetic bearing stator 9 are all smaller than the inner diameter of the mounting frame 1, so that each stator tooth extends out of each positioning hole. There is a gap 13 between the mounting frame 1 and the mandrel 12. The mandrel 12 is in contact with the stator teeth of each stator, and the mandrel 12 ensures that each stator is coaxially arranged. A release agent is sprayed on the contact surface where the stator teeth contact the mandrel 12.

[0058] Step 2: Inject epoxy resin between the mounting frame 1 of the potting assembly and the stator housing;

[0059] Step 3: After the epoxy resin cools down, demold the mandrel 12.

[0060] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A mounting skeleton, characterized in that, Comprising: a skeleton body (2) in the shape of a circular tube; a plurality of sets of positioning holes arranged along the axial direction of the skeleton body (2), each set of positioning holes having a plurality of positioning holes arranged along the circumferential direction of the skeleton body (2) and corresponding to the stator teeth; the skeleton body (2) is composed of a plurality of skeleton units (7) spliced together; the splicing surface between the plurality of skeleton units (7) is parallel to the axis of the skeleton body (2), or the splicing surface between the plurality of skeleton units (7) is perpendicular to the axis of the skeleton body (2), and the splicing surface divides the positioning holes in the set of positioning holes into two parts; the axial spacing between the sets of positioning holes is fixed and determined at one time, thereby determining the axial spacing of the plurality of stators.

2. The mounting skeleton according to claim 1, characterized in that The set of positioning holes comprises a first set of positioning holes (4), a second set of positioning holes (5), and a third set of positioning holes (6) arranged along the axial direction of the skeleton body (2) in sequence, wherein the positioning holes in the first set of positioning holes (4) and the third set of positioning holes (6) are arranged one-to-one.

3. The mounting skeleton according to claim 2, characterized in that Further comprising: a set of sensor mounting holes (3) arranged on the skeleton body (2), the set of sensor mounting holes (3) having two groups arranged at the two ends of the skeleton body (2), each group having a plurality of mounting holes arranged along the circumferential direction of the skeleton body (2).

4. A one-piece stator characterized by, Comprising: the mounting skeleton (1) of any one of claims 1-3; a set of stators having a plurality of stators arranged in the set of positioning holes of the mounting skeleton (1), the stators having stator teeth extending towards the center, and the stator teeth being embedded in the stator holes of the set of stator holes.

5. A unitary stator as claimed in claim 4, characterised in that, The set of stators comprises an upper radial magnetic bearing stator (8), a lower radial magnetic bearing stator (9), and a motor stator (10), the motor stator (10) being located between the upper radial magnetic bearing stator (8) and the lower radial magnetic bearing stator (9).

6. The monoblock stator of claim 4, wherein, Further comprising: a set of sensors (11) having two groups arranged at the two ends of the skeleton body (2).

7. A method of potting an integral stator, characterised in that, Comprising the following steps: Step 1: using the mounting skeleton (1) of any one of claims 1-3 to splice the upper radial magnetic bearing stator (8), the motor stator (10), and the lower radial magnetic bearing stator (9) into a whole, sleeving a stator shell outside the whole, and inserting a mandrel (12) into the center of the mounting skeleton (1), to jointly form a to-be-potted assembly; Step 2: pouring epoxy glue between the mounting skeleton (1) and the stator shell of the to-be-potted assembly; Step 3: after the epoxy glue cools, demolding the mandrel (12).

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