Filling and sealing tool for shell-free stator of magnetic suspension motor

Abstract

The utility model belongs to the technical field of motor production, and discloses a magnetic suspension motor shell-less stator potting tool, which comprises a base, a mandrel and an upper cover which are sequentially and coaxially arranged, the top of the base is provided with a groove cavity, the lower end of the mandrel is arranged in the groove cavity, one end, extending into the groove cavity, of the mandrel is fixedly installed with the base through a locking structure, and the upper cover is arranged on the base. A center hole penetrates through the center of the upper cover, the upper end of the mandrel penetrates through the upper cover through the center hole, and the upper cover and the base are fixedly installed together through an installation assembly. According to the utility model, a bottom-to-top pouring sealant pouring mode is adopted, so that the problems of air holes in stator shell-free potting cured materials and poor bottom potting are solved, and the potting quality of the stator is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to motor production technical field especially is related to a kind of magnetic suspension motor shellless stator potting tool. BACKGROUND

[0002] Motor stator encapsulation is a kind of motor production process based on epoxy resin, epoxy resin is liquid at normal temperature, and it is mixed with curing agent according to certain proportion and poured between motor slot and end part, to form solidified product with impact resistance, so as to achieve the effect of protecting motor stator, improving stator heat conduction and improving insulation grade.

[0003] Motor stator potting tool is an auxiliary tool for realizing the potting of motor stator slot and end part.

[0004] In the Chinese utility model patent with patent application number 202320987202.4, a motor stator potting tool is proposed. However, this patent has the following main problems: during the potting process, the potting glue flows from the upper end to the lower end of the stator. In the magnetic suspension motor, the slot fill rate of the motor stator is high, and the gap available for the flow of potting glue between the slots is relatively small. During the potting process from top to bottom, air bubbles between the stator windings and at the lower end of the stator often cannot be promptly discharged, which can easily form air holes in the solidified product or cause defects in the potting of the lower end of the stator. UTILITY MODEL CONTENTS

[0005] The main technical problem to be solved by the utility model is to provide a magnetic suspension motor shellless stator potting tool, which uses a potting glue pouring method from bottom to top, solves the problems of air holes in the solidified product of the shellless stator and poor bottom potting, and improves the potting quality of the stator.

[0006] To solve the above technical problems, the utility model provides the following technical scheme:

[0007] A magnetic suspension motor shellless stator potting tool includes a base, a mandrel, and an upper cover arranged coaxially in sequence. The top of the base is provided with a slot cavity, and the lower end of the mandrel is arranged in the slot cavity. The end of the mandrel extending into the slot cavity is fixedly installed with the base through a locking structure. A central hole is provided in the center of the upper cover, and the upper end of the mandrel passes through the central hole and the upper cover. The upper cover is fixedly installed with the base through a mounting assembly.

[0008] The following is a further optimization of the above technical scheme by the utility model:

[0009] A boss is provided at the center of the end face of the mandrel. Two mutually perpendicular and intersecting flow guide grooves are formed in the boss and the end face of the mandrel. The end of each flow guide groove extends to the side wall of the mandrel. A circular groove is provided at the intersection of the two flow guide grooves, and a glue pouring cavity penetrates the mandrel in the axial direction at the center of the circular groove.

[0010] Further optimization: the locking structure comprises a first counterbore formed in the center of the bottom wall of the groove cavity, the boss is inserted into the first counterbore, a plurality of first locking screw holes are formed in the bottom wall of the first counterbore, a plurality of second locking screw holes are formed in the end of the boss, each second locking screw hole is matched with the first locking screw hole, and each second locking screw hole is fixedly connected with the corresponding first locking screw hole through a locking bolt.

[0011] Further optimization: the outer side of each first locking screw hole is provided with a first annular sealing groove.

[0012] Further optimization: the mounting assembly comprises a plurality of connecting rods, the lower end of the connecting rod is provided with an external thread segment, the external thread segment is installed on the top of the base in a threaded connection mode, the upper end of the connecting rod is provided with a first fixing screw hole, and the first fixing screw hole is fixedly connected with the upper cover through a fastening bolt.

[0013] Further optimization: a plurality of bidirectional countersunk holes are formed in the upper cover in a penetrating mode, each bidirectional countersunk hole is matched with the connecting rod, and the lower end of the fastening bolt is threadedly connected with the first fixing screw hole through the bidirectional countersunk hole.

[0014] Further optimization: the top of the base is provided with a plurality of second fixing screw holes, each second fixing screw hole is matched with the external thread segment, and the external thread segment is installed in the corresponding second fixing screw hole in a threaded connection mode.

[0015] Further optimization: the top of the inner wall of the groove cavity is provided with a second annular sealing groove.

[0016] Further optimization: the lower end of the inner wall of the central hole is provided with a third annular sealing groove.

[0017] Further optimization: a plurality of lifting rings are installed on the top of the upper cover.

[0018] The utility model discloses the above-mentioned technical scheme has the following beneficial effects:

[0019] 1, the utility model discloses the above-mentioned technical scheme, clever design, reasonable structure, from the bottom of the stator begins to inject glue, because of the surface tension of potting adhesive, the rising degree of potting adhesive liquid surface is consistent.

[0020] Compared with the top-down potting mode, the potting adhesive is more uniform in the process of being injected from bottom to top between the grooves, and the air existing between the grooves is discharged upward due to the injection of the potting adhesive, thereby solving the problem of air bubbles existing in the potting adhesive and ensuring that the potting adhesive will not produce pores after solidification.

[0021] 2、The utility model discloses a self -bottom to the filling and sealing mode, and filling and sealing glue is filled according to the glue injection route of the stator lower end portion to the slot, from the stator slot to the upper end portion, fills the whole stator, guarantees that there is enough amount of filling and sealing glue at the bottom of stator, thereby solve the problem of stator bottom filling and sealing, and further improve the filling and sealing quality of stator.

[0022] The utility model is further illustrated below in connection with the drawings and examples. DRAWINGS

[0023] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the drawings needed to be used in the embodiment or prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can also be obtained according to these drawings without the creative labor of the ordinary skilled in the art.

[0024] Figure 1 It is the schematic diagram of the overall structure in the embodiment of the utility model;

[0025] Figure 2 It is the longitudinal section structure diagram of the embodiment of the utility model;

[0026] Figure 3 It is the structural schematic diagram of the base in the embodiment of the utility model;

[0027] Figure 4 It is the structural schematic diagram of the mandrel in the embodiment of the utility model;

[0028] Figure 5 It is the structural schematic diagram of the upper cover in the embodiment of the utility model;

[0029] Figure 6 It is Figure 5 The sectional view of A-A direction in the embodiment of the utility model.

[0030] In the drawing: 1, base;11, slot cavity;12, second annular sealing groove;2, mandrel;21, boss;22, flow guide groove;23, round groove;24, filling cavity;3, upper cover;31, center hole;32, third annular sealing groove;33, lifting ring;4, locking structure;41, first counterbore;42, first locking screw hole;43, second locking screw hole;44, first annular sealing groove;5, mounting assembly;51, connecting rod;52, external thread section;53, first fixed screw hole;54, fastening bolt;55, bidirectional countersunk hole;56, second fixed screw hole;6, stator. DETAILED DESCRIPTION

[0031] Clearly, the described embodiments are merely a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0032] As Figures 1-6 As shown in FIGS. 1-3, a kind of magnetic suspension motor shellless stator potting tool, including the bottom 1, mandrel 2 and upper cover 3 that are coaxially arranged in sequence, the top of bottom 1 is equipped with slot cavity 11, the lower end of mandrel 2 is arranged in slot cavity 11, the end of mandrel 2 that extends into slot cavity 11 is fixedly installed together with bottom 1 by locking structure 4, and the center of upper cover 3 is equipped with center hole 31, the upper end of mandrel 2 passes through upper cover 3 by center hole 31, and upper cover 3 is fixedly installed together with bottom 1 by mounting assembly 5.

[0033] In the embodiment, the self-downward potting glue injection mode is adopted, which is beneficial to the discharge of air inside the small gap between stator 6 grooves while the glue liquid surface rises, thereby solving the problems of air hole in stator 6 shellless potting solidification and poor bottom potting.

[0034] As Figure 2 And Figure 4 As shown in FIGS. 1-3, the end face of mandrel 2 is equipped with boss 21, boss 21 and the end face of mandrel 2 are equipped with two mutually perpendicular and intersecting flow guide grooves 22, the end of each flow guide groove 22 extends to the side wall of mandrel 2, the intersection position of the two flow guide grooves 22 is equipped with circular groove 23, and the center of circular groove 23 is equipped with a glue pouring cavity 24 penetrating mandrel 2 in axial direction.

[0035] In the embodiment, the peripheral surface of mandrel 2 is tightly fitted with the inner ring of stator 6.

[0036] In the embodiment, the setting of glue pouring cavity 24 facilitates the bottom injection work of potting glue, and the setting of flow guide groove 22 can uniformly guide the potting glue outward, thereby ensuring the uniformity of the rising of glue liquid surface.

[0037] As Figures 2-4 As shown in FIGS. 1-3, locking structure 4 includes first counterbore 41 opened in the center of bottom wall of slot cavity 11, boss 21 is inserted into first counterbore 41, a plurality of first locking screw holes 42 are opened in the bottom wall of first counterbore 41, a plurality of second locking screw holes 43 are opened in the end of boss 21, each second locking screw hole 43 is matched with first locking screw hole 42, and each second locking screw hole 43 is fixedly connected with corresponding first locking screw hole 42 by locking bolt.

[0038] The outer side of each first locking screw hole 42 is provided with a first annular sealing groove 44.

[0039] As Figures 1-6 shown, the mounting assembly 5 includes a plurality of connecting rods 51, the lower end of the connecting rod 51 is provided with an external thread section 52, the external thread section 52 is installed on the top of the base 1 in a threaded connection manner, the upper end of the connecting rod 51 is provided with a first fixing screw hole 53, and the first fixing screw hole 53 is fixedly connected with the upper cover 3 through a fastening bolt 54.

[0040] Among them, a plurality of bidirectional countersunk holes 55 are provided on the upper cover 3, each bidirectional countersunk hole 55 is matched with the connecting rod 51, and the lower end of the fastening bolt 54 is threadedly connected with the first fixing screw hole 53 through the bidirectional countersunk hole 55.

[0041] In the embodiment, the countersunk head of the bidirectional countersunk hole 55 close to the upper end face is used for avoiding the screw head of the fastening bolt 54.

[0042] The countersunk head of the bidirectional countersunk hole 55 close to the lower end face is used for guiding and avoiding the connecting rod 51, so that the connecting rod 51 remains in an upright state.

[0043] As Figure 2 and Figure 3 shown, the top of the base 1 is provided with a plurality of second fixing screw holes 56, each second fixing screw hole 56 is matched with the external thread section 52, and the external thread section 52 is installed in the corresponding second fixing screw hole 56 in a threaded connection manner.

[0044] Moreover, the top of the inner wall of the cavity 11 is provided with a second annular sealing groove 12.

[0045] In addition, the lower end of the inner wall of the central hole 31 is provided with a third annular sealing groove 32.

[0046] The top of the upper cover 3 is provided with a plurality of lifting rings 33.

[0047] The process of assembling the stator 6 by using the utility model is as follows:

[0048] S1, the stator 6 is placed into a heating furnace for preheating (the heating temperature is 90 DEG C, and the heating time is 2h).

[0049] S2, the second annular sealing groove 12 and the first annular sealing groove 44 are filled with corresponding sealing rings.

[0050] S3, the boss 21 on the mandrel 2 is inserted into the first countersunk hole 41 in the base 1, the locking bolt is passed through the second locking screw hole 43 and the first locking screw hole 42, and the mandrel 2 and the base 1 are fixedly installed together.

[0051] S4, the base 1 and the mandrel 2 are brushed with a full release agent, and the stator 6 is preheated.

[0052] S5, the preheated stator 6 is taken out and vertically placed, the mandrel 2 passes through the inner ring of the stator 6, and the sealing ring in the second annular sealing groove 12 on the base 1 is in contact with the silicon steel sheet on the stator 6.

[0053] S6, the stator 6 is turned over so that the base 1 faces downward, at this time, the silicon steel sheet of the stator 6 is clamped at the step of the opening of the groove cavity 11 of the base 1 and is in close contact with the sealing ring at the second annular sealing groove 12.

[0054] S7, glass glue is injected into the second annular sealing groove 12 to seal the bottom wall of the groove cavity 11 and form a lower end sealing space inside the groove cavity 11.

[0055] S8, the outer threaded section 52 at the lower end of the connecting rod 51 is screwed into the second fixed screw hole 56 of the base 1.

[0056] S9, a sealing strip is installed in the third annular sealing groove 32.

[0057] S10, the lower end of the bidirectional counterbore hole 55 on the upper cover 3 is aligned with the connecting rod 51, the upper cover 3 passes through the upper end of the stator 6, and the upper cover 3 is tightly pressed on the silicon steel sheet at the upper end of the stator 6, so that the sealing strip is in close contact with the silicon steel sheet at the upper end of the stator 6.

[0058] S11, the end of the connecting rod 51, which is provided with the first fixed screw hole 53, is inserted into the corresponding bidirectional counterbore hole 55, and the fastening bolt 54 is screwed into the first fixed screw hole 53 after passing through the bidirectional counterbore hole 55, so that the upper cover 3 and the base 1 are fixedly installed.

[0059] S12, glass glue is injected into the third annular sealing groove 32 to form an upper end sealing space.

[0060] The process of using the utility model for pouring and sealing the stator 6 is as follows:

[0061] S1, a PU tube with a length longer than that of the mandrel 2 is cut, one end of the PU tube is directly inserted into the bottom of the mandrel 2 through the glue pouring cavity 24 in the center of the mandrel 2, the other end of the PU tube is connected to the glue injection port of the pouring machine through an adapter, and the device is started to pour and seal the stator.

[0062] S2, the pouring glue in the pouring machine is transported through the PU tube and injected into the bottom of the mandrel 2, and then flows into the lower end sealing space through the circular groove 23 and the flow guide groove 22 at the bottom of the mandrel 2.

[0063] S3, after the pouring glue fills the lower end sealing space, the liquid level continues to rise and is injected into the grooves of the stator 6.

[0064] S4, with the increasing of the amount of potting glue, the liquid level rises, and the stator 6 is filled with the gap between the slots, and the potting glue is also injected into the upper end sealing space through the gap between the slots.

[0065] S5, until the liquid level of the potting glue is higher than the upper end surface of the stator 6, and the stator 6 is completely covered, stop the potting machine, remove the adapter, and take out the PU tube.

[0066] S6, a stainless steel flexible shaft with the same diameter and length as the PU tube is inserted into the glue filling cavity 24.

[0067] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A magnetic levitation motor shell-less stator potting tool, characterized in that, The application relates to a coaxial three-layered structure, which comprises a base (1), a mandrel (2) and an upper cover (3) arranged coaxially in sequence, the top of the base (1) is provided with a groove cavity (11), the lower end of the mandrel (2) is arranged in the groove cavity (11), the end of the mandrel (2) extending into the groove cavity (11) is fixedly installed with the base (1) through locking structures (4), the center of the upper cover (3) is provided with a center hole (31), the upper end of the mandrel (2) passes through the upper cover (3) through the center hole (31), and the upper cover (3) is fixedly installed with the base (1) through mounting assemblies (5).

2. The magnetic levitation motor shell-free stator potting tool according to claim 1, characterized in that, The end surface of the mandrel (2) is provided with a boss (21), two mutually perpendicular and intersecting flow guide grooves (22) are formed in the boss (21) and the end surface of the mandrel (2), the end of each flow guide groove (22) extends to the side wall of the mandrel (2), a circular groove (23) is arranged at the intersecting position of the two flow guide grooves (22), and the center of the circular groove (23) is provided with a glue pouring cavity (24) penetrating through the mandrel (2) in the axial direction.

3. The magnetic levitation motor shell-free stator potting tool of claim 2, wherein, The locking structures (4) comprise a first counterbore (41) formed in the center of the bottom wall of the groove cavity (11), the boss (21) is inserted into the first counterbore (41), a plurality of first locking screw holes (42) are formed in the bottom wall of the first counterbore (41), a plurality of second locking screw holes (43) are formed in the end of the boss (21), each second locking screw hole (43) is matched with the first locking screw hole (42), and each second locking screw hole (43) is fixedly connected with the corresponding first locking screw hole (42) through a locking bolt.

4. The magnetic levitation motor shell-free stator potting tool of claim 3, wherein, The outer side of each first locking screw hole (42) is provided with a first annular sealing groove (44).

5. The magnetic levitation motor shell-free stator potting tool of claim 1, wherein, The mounting assemblies (5) comprise a plurality of connecting rods (51), the lower end of each connecting rod (51) is provided with an external thread section (52), the external thread section (52) is installed on the top of the base (1) in a threaded connection mode, the upper end of each connecting rod (51) is provided with a first fixing screw hole (53), and the first fixing screw hole (53) is fixedly connected with the upper cover (3) through a fastening bolt (54).

6. The magnetic levitation motor shell-free stator potting tool of claim 5, wherein, A plurality of bidirectional countersunk holes (55) are formed in the upper cover (3), each bidirectional countersunk hole (55) is matched with the connecting rod (51), and the lower end of the fastening bolt (54) is threadedly connected with the first fixing screw hole (53) after passing through the bidirectional countersunk hole (55).

7. The magnetic levitation motor shell-free stator potting tool of claim 5, wherein, The top of the base (1) is provided with a plurality of second fixing screw holes (56), each second fixing screw hole (56) is matched with the external thread section (52), and the external thread section (52) is installed in the corresponding second fixing screw hole (56) in a threaded connection mode.

8. The magnetic levitation motor shell-free stator potting tool of claim 2, wherein, The top of the inner wall of the groove cavity (11) is provided with a second annular sealing groove (12).

9. The magnetic levitation motor shell-less stator potting tool of claim 6, wherein, The lower end of the inner wall of the center hole (31) is provided with a third annular sealing groove (32).

10. The magnetic levitation motor shell-free stator potting tool of claim 2, wherein, A plurality of lifting rings (33) are installed on the top of the upper cover (3).

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