Stator winding epoxy potting ring

Abstract

The utility model relates to motor technical field, concretely relates to a kind of stator winding epoxy glue's tool for pouring, including inner support cylinder, front end cover and rear end cover, the inner support cylinder is coaxially installed in the inside of shell, the front end cover and rear end cover are coaxially installed in the upper and lower ends of inner support cylinder and cooperate shell to carry out plugging for the cavity for installing stator winding;The inner support cylinder inner wall is provided with several reserved pouring channels, pouring channel is distributed around inner support cylinder axis, pouring channel is injected into the cavity for installing stator winding by pouring epoxy glue into injection channel.This technical scheme is designed to the shape of inner support cylinder outer wall and the distance between inner support cylinder outer wall and stator winding, realize the accurate control to the shape and weight of winding after pouring, cooperate multiple pouring channels to ensure that epoxy glue completely and evenly covers stator winding.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, specifically to a tooling for potting epoxy resin into stator windings. Background Technology

[0002] The stator winding is the core component for energy conversion in a motor, and its heat dissipation efficiency and insulation performance directly determine the motor's reliability. In conventional motor manufacturing, potting technology has become a key process: by filling the gaps in the windings with materials such as epoxy resin and silicone, a continuous heat conduction path can be created to quickly transfer the Joule heat generated by the windings to the housing, while also isolating dust and moisture, raising the insulation level to IP65 and above. This technology has been widely used in industrial drives and new energy vehicle motors. However, for aircraft electric propulsion motors, lightweight design directly affects the aircraft's range and payload. For every 100g increase in motor weight, the range may be shortened by 5%-8%. Moreover, aircraft motor housings are mostly integrated thin-walled structures, and the shape and weight of the end of the windings after potting are difficult to control. Utility Model Content

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to strictly control the molding dimensions and weight of the potting compound. To this end, a tooling for potting epoxy resin onto stator windings is provided, comprising an inner support cylinder, a front end cap, and a rear end cap. The inner support cylinder is coaxially mounted inside the housing. The front end cap and rear end cap are coaxially mounted at the upper and lower ends of the inner support cylinder and, together with the housing, seal the cavity used for mounting the stator windings. The inner wall of the inner support cylinder has several pre-reserved injection channels distributed around the axis of the inner support cylinder. The potting compound is injected into the cavity where the stator windings are mounted through these injection channels.

[0004] To achieve precise delivery of epoxy resin into the injection channel, the following features are specifically designed: the injection channel protrudes from the inner wall of the front cover, a detachable hopper is provided at the top of the injection channel, and the bottom of the hopper is connected to the injection channel through a connecting pipe.

[0005] Preferably, the bottom end of the connecting tube is coaxially provided with a plug with the same inner diameter as the infusion channel, and the connecting tube is inserted into the infusion channel through the plug.

[0006] To achieve uniform injection of epoxy resin, the following features are specifically designed: the injection channel includes a first injection channel that extends vertically to the top of the rear end cap.

[0007] Preferably, a molding groove is provided at the bottom of the inner support cylinder, and the output end of the first liquid injection channel extends into the molding groove. The molding groove cooperates with the rear end cover to form a molding cavity for potting adhesive molding located at the bottom of the stator winding.

[0008] Preferably, the injection channel includes an "L"-shaped second injection channel, the output end of which is located at the upper end of the stator winding.

[0009] To ensure the stability of the front and rear covers and facilitate quick installation and disassembly, the following features are specifically provided: the front and rear covers are fixedly connected to the housing by bolts.

[0010] To prevent epoxy resin from overflowing from the injection channel, the following features are specifically provided: the rear end cover is provided with a discharge port, and the discharge port is equipped with a removable sealing plug.

[0011] The advantages of this utility model compared to the prior art are: Firstly, the inner support cylinder of this utility model is set inside the housing, and the front and rear covers seal the annular space formed by the inner support cylinder and the housing. By designing the shape of the outer wall of the inner support cylinder and the distance between the outer wall of the inner support cylinder and the stator winding, the precise control of the end shape and weight of the winding after potting is achieved.

[0012] Secondly, this utility model achieves different injection methods at different locations through the first injection channel and the second injection channel, ensuring that the epoxy resin completely and evenly covers the stator winding, and the epoxy resin can be molded in the molding tank to seal the bottom of the stator winding.

[0013] Thirdly, in this embodiment, excess epoxy resin can be drained by removing the sealing plug at the discharge port, and then the discharge port can be sealed again with the sealing plug to ensure that the amount of epoxy resin is at an appropriate level. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a three-dimensional view of a tooling for potting epoxy resin into stator windings.

[0016] Figure 2 This is a three-dimensional sectional view of a tooling for encapsulating epoxy resin in stator windings.

[0017] Figure 3 for Figure 2 A magnified view of part A.

[0018] Figure 4 This is an exploded three-dimensional diagram of a tooling structure for encapsulating epoxy resin in stator windings.

[0019] Figure 5 A three-dimensional inner support cylinder for a tooling for potting epoxy resin into stator windings. Figure 1 .

[0020] Figure 6 A three-dimensional inner support cylinder for a tooling for potting epoxy resin into stator windings. Figure 2 .

[0021] Explanation of reference numerals in the attached drawings: 1. Inner support cylinder; 1a. Injection channel; 1a1. First injection channel; 1a2. Second injection channel; 1b. Hopper; 1b1. Connecting pipe; 1b2. Insert nozzle; 1c. Molding groove; 2. Front end cover; 3. Rear end cover; 3a. Glue discharge port. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Reference Figures 1 to 6 : A tooling for potting epoxy resin into stator windings includes an inner support cylinder 1, a front end cover 2, and a rear end cover 3. The inner support cylinder 1 is coaxially installed inside the housing. The front end cover 2 and the rear end cover 3 are coaxially installed at the upper and lower ends of the inner support cylinder 1 and cooperate with the housing to seal the cavity used for installing the stator windings. The inner wall of the inner support cylinder 1 is provided with a number of reserved potting channels 1a. The potting channels 1a are distributed around the axis of the inner support cylinder 1, and the potting resin is injected into the cavity where the stator windings are installed through the potting channels 1a.

[0024] In this application, the inner support cylinder 1 is located inside the housing. The front cover 2 and the rear cover 3 seal the annular space formed by the inner support cylinder 1 and the housing. The stator assembly installed inside the housing is located in the annular cavity. The operator injects potting compound into the annular cavity through the injection channel 1a on the inner wall of the inner support cylinder 1. After the potting compound fills the annular space and forms, the front cover 2, the rear cover 3 and the inner support cylinder 1 can be disassembled in sequence. In this embodiment, the shape of the outer wall of the inner support cylinder 1 and the distance between the outer wall of the inner support cylinder 1 and the stator winding can be designed to achieve precise control over the end shape and weight of the winding after potting.

[0025] To achieve precise delivery of epoxy adhesive into the injection channel 1a, the following features are specifically designed: The injection channel 1a shown protrudes from the inner wall of the front cover 2. A detachable hopper 1b is provided at the top of the injection channel 1a, and the bottom of the hopper 1b is connected to the injection channel 1a through a connecting pipe 1b1.

[0026] The bottom end of the connecting tube 1b1 is coaxially provided with a plug 1b2 that has the same inner diameter as the injection channel 1a, and the connecting tube 1b1 is inserted into the injection channel 1a through the plug 1b2.

[0027] like Figure 3 As shown, in this embodiment, the worker can introduce epoxy resin into the hopper 1b. The epoxy resin enters the injection channel 1a through the connecting pipe 1b1 at the bottom of the hopper 1b for injection. The plug 1b2 at the bottom of the connecting pipe 1b1 has the same inner diameter as the input end of the injection channel 1a. Therefore, the plug 1b2 can be inserted into the input end of different injection channels 1a. While the epoxy resin is being injected into the cavity where the stator winding is located, leakage of epoxy resin from the connection between the hopper 1b and the injection channel 1a is prevented.

[0028] To achieve uniform injection of epoxy resin, the following features are specifically designed: The infusion channel 1a includes a first infusion channel 1a1 that extends vertically above the rear end cap 3.

[0029] A molding groove 1c is provided at the bottom of the inner support cylinder 1. The output end of the first liquid injection channel 1a1 extends into the molding groove 1c. The molding groove 1c and the rear end cover 3 cooperate to form a molding cavity for potting adhesive molding located at the bottom of the stator winding.

[0030] The injection channel 1a includes an "L"-shaped second injection channel 1a2, the output end of which is located at the upper end of the stator winding.

[0031] like Figure 5 and Figure 6 As shown, the injection channel 1a in this embodiment has several channels. Therefore, the operator can install the hopper 1b on different injection channels 1a to inject the stator winding. When the hopper 1b is connected to the first injection channel 1a1, the epoxy resin directly enters the molding groove 1c at the bottom of the inner support cylinder 1 and flows to the bottom of the stator winding through the molding groove 1c, realizing bottom-up injection. When the hopper 1b is connected to the second injection channel 1a2, the epoxy resin flows out through the output end of the second injection channel 1a2, injecting the stator winding from top to bottom. By injecting in different positions and in different ways, the epoxy resin can completely and evenly cover the stator winding, and the epoxy resin can be molded in the molding groove 1c to seal the bottom of the stator winding.

[0032] To ensure the stability of the front cover 2 and the rear cover 3, and to facilitate quick installation and removal, the following features are specifically designed: The front cover 2 and the rear cover 3 are fixedly connected to the housing by bolts.

[0033] To prevent epoxy resin from overflowing from the injection channel 1a, the following features are specifically designed: The rear cover 3 is provided with a glue discharge port 3a, and the glue discharge port 3a is equipped with a removable sealing plug.

[0034] like Figure 4 As shown, in this embodiment, the rear cover 3 is provided with a discharge port 3a. When too much epoxy resin is injected into the inner support cylinder 1 and the housing, causing overflow, the operator can remove the sealing plug at the discharge port 3a to allow the excess epoxy resin to flow out. Then, the discharge port 3a is sealed again with the sealing plug to ensure that the amount of epoxy resin is at an appropriate level.

[0035] In this embodiment, the inner support cylinder 1 is placed inside the housing. The front cover 2 and the rear cover 3 seal the annular space formed by the inner support cylinder 1 and the housing. The stator assembly installed inside the housing is located in the annular cavity. The operator injects potting compound into the annular cavity through the injection channel 1a on the inner wall of the inner support cylinder 1. After the potting compound fills the annular space and forms, the front cover 2, the rear cover 3 and the inner support cylinder 1 can be disassembled in sequence.

[0036] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A tooling for encapsulating stator windings with epoxy resin, characterized in that, It includes an inner support cylinder (1), a front end cover (2) and a rear end cover (3). The inner support cylinder (1) is coaxially installed inside the housing. The front end cover (2) and the rear end cover (3) are coaxially installed at the upper and lower ends of the inner support cylinder (1) and cooperate with the housing to seal the cavity used for installing the stator winding. The inner wall of the inner support cylinder (1) is provided with several reserved injection channels (1a). The injection channels (1a) are distributed around the axis of the inner support cylinder (1). The potting compound is injected into the cavity where the stator winding is installed through the injection channels (1a).

2. The tooling for encapsulating stator windings with epoxy resin according to claim 1, characterized in that, The injection channel (1a) shown protrudes from the inner wall of the front cover (2). A detachable hopper (1b) is provided at the top of the injection channel (1a). The bottom end of the hopper (1b) is connected to the injection channel (1a) through a connecting pipe (1b1).

3. The tooling for encapsulating stator windings with epoxy resin according to claim 2, characterized in that, The bottom end of the connecting tube (1b1) is coaxially provided with a plug (1b2) with the same inner diameter as the infusion channel (1a), and the connecting tube (1b1) is inserted into the infusion channel (1a) through the plug (1b2).

4. The tooling for encapsulating stator windings with epoxy resin according to claim 1, characterized in that, The infusion channel (1a) includes a first infusion channel (1a1) that extends vertically above the rear end cap (3).

5. The tooling for encapsulating stator windings with epoxy resin according to claim 4, characterized in that, The bottom of the inner support cylinder (1) is provided with a molding groove (1c), and the output end of the first liquid injection channel (1a1) extends into the molding groove (1c). The molding groove (1c) and the rear end cover (3) cooperate to form a molding cavity for potting adhesive molding located at the bottom of the stator winding.

6. The tooling for encapsulating stator windings with epoxy resin according to claim 1, characterized in that, The injection channel (1a) includes an "L"-shaped second injection channel (1a2), the output end of which is located at the upper end of the stator winding.

7. The tooling for encapsulating stator windings with epoxy resin according to claim 1, characterized in that, The front cover (2) and the rear cover (3) are fixedly connected to the housing by bolts.

8. The tooling for encapsulating stator windings with epoxy resin according to claim 1, characterized in that, The rear cover (3) is provided with a glue discharge port (3a), and the glue discharge port (3a) is equipped with a removable sealing plug.

Images