Condensation prevention structure for electric machine

Abstract

The utility model relates to motor protection technical field especially relates to a kind of prevent motor condensation structure, comprising: motor cavity, junction box cavity, stator phase outgoing line, junction box cavity is connected with motor cavity;Stator phase outgoing line one side is located in motor cavity, other side is located in junction box cavity inside.The utility model is used by upper rubber sleeve, lower rubber sleeve and sub-cavity rib plate cooperation, the upper and lower sealing isolation of stator phase outgoing line is completed, so that motor cavity and junction box cavity form two different cavities, form physical isolation, which in motor working process, air in motor cavity is blocked by isolation component and isolated, so that hot air cannot reach junction box cavity, complete heat convection inhibition, so that junction box cavity and motor outside temperature difference reduces, inside and outside temperature reaches relative balance, cannot reach the environmental conditions of generating condensate, prevent the appearance of condensation phenomenon, and then effectively avoid the insulation problem of poor in the high-voltage outgoing line, high-voltage terminal and other positions of motor.

Description

Technical Field

[0001] This utility model relates to the field of motor protection technology, and in particular to a structure for preventing condensation on motors. Background Technology

[0002] During motor operation, the stator windings serve as the primary heat source, transferring heat to the motor housing and junction box housing via thermal convection and radiation. In traditional motor designs, the winding working chamber and the junction box housing are typically directly connected, allowing hot air to flow freely between the chambers. When the motor stops or the ambient temperature drops suddenly, a significant temperature difference forms between the inside and outside of the chamber. When the hot, humid air comes into contact with the cooler metal casing (such as the junction box cover), it quickly condenses into water droplets, a phenomenon known as condensation.

[0003] The harmful effects of condensation on motors are mainly manifested in the following aspects:

[0004] 1. Deterioration of electrical performance: Condensation adhering to live parts (such as three-phase terminals) inside the junction box can easily cause insulation failure, short circuit, or even motor burnout;

[0005] 2. Metal corrosion: Long-term accumulation of moisture will accelerate the corrosion of the motor housing, junction box housing and internal metal parts, reducing structural strength and protection level.

[0006] Existing motor anti-condensation technologies have the following drawbacks:

[0007] 1. Completely sealed solution: Some designs isolate moisture by enhancing the sealing of the cavity, but excessive sealing will hinder the balance of internal and external pressure, causing moisture inside the cavity to be unable to escape, which will increase the risk of condensation.

[0008] 2. Single vent valve design: Although vent valves with vent membranes or grid structures can allow air circulation, they cannot effectively isolate the heat convection between the motor cavity and the junction box cavity, and are not adaptable to high humidity environments.

[0009] 3. Insufficient heat insulation: Traditional junction boxes lack heat insulation material between themselves and the motor end cover, causing the heat from the windings to be quickly transferred to the junction box cavity through contact heat transfer, increasing the temperature difference between the inside and outside. Utility Model Content

[0010] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention may be realized and obtained by means of the structures particularly pointed out in the description and other accompanying drawings.

[0011] The purpose of this invention is to overcome the above-mentioned shortcomings and provide a structure to prevent condensation in motors.

[0012] To achieve the above objectives, the technical solution of this utility model is: a structure for preventing motor condensation, comprising: a motor cavity, a junction box cavity, and stator phase output lines, wherein the junction box cavity is connected to the motor cavity; one side of the stator phase output lines is located within the motor cavity, and the other side is located within the junction box cavity; an isolation component is installed between the motor cavity and the junction box cavity and is connected to the stator phase output lines; wherein the isolation component comprises an upper rubber sleeve, a lower rubber sleeve, and a cavity-separating rib, wherein the upper rubber sleeve and the lower rubber sleeve are spliced ​​together, and one side of the stator phase output lines passes through the spliced ​​upper rubber sleeve and the lower rubber sleeve, and the cavity-separating rib is inserted into the side of the upper rubber sleeve and the lower rubber sleeve.

[0013] In some embodiments, the partition rib is located between the motor cavity and the junction box cavity.

[0014] In some embodiments, the stator phase output lines are provided in a plurality of manner and are all connected to an upper rubber sleeve and a lower rubber sleeve. The upper rubber sleeve and the lower rubber sleeve are connected to adjacent upper rubber sleeves and lower rubber sleeves through a cavity rib plate.

[0015] In some embodiments, a stator core and a stator winding are housed within the motor cavity, with the stator winding mounted on the stator core.

[0016] In some embodiments, the stator phase output wire is connected to the stator winding on one side of the motor cavity.

[0017] By adopting the above technical solution, the beneficial effects of this utility model are as follows: This utility model uses the upper rubber sleeve, lower rubber sleeve and cavity rib plate in combination to complete the upper and lower sealing isolation of the stator phase output line, so that the motor cavity and the junction box cavity form two different cavities, forming physical isolation. During the operation of the motor, the air in the motor cavity is blocked and isolated by the isolation component, so that hot air cannot reach the junction box cavity, thus completing the suppression of thermal convection. As a result, the temperature difference between the junction box cavity and the outside of the motor is reduced, and the internal and external temperatures reach a relative balance, which prevents the environmental conditions for the generation of condensate water, thus preventing condensation. In this way, it effectively avoids the problem of poor insulation at the high voltage output line and high voltage terminal of the motor.

[0018] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure.

[0019] Undoubtedly, such and other objects of this invention will become more apparent after the following detailed description of the preferred embodiments, which are illustrated in various accompanying drawings and illustrations.

[0020] To make the above-mentioned beneficial effects and other objects, features and advantages of this utility model more apparent and understandable, one or more preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0022] In the accompanying drawings, the same parts use the same reference numerals, and the drawings are schematic and not necessarily drawn to actual scale.

[0023] 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 one or several embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on such drawings without creative effort.

[0024] Explanation of key figure labels:

[0025] Figure 1 This is a schematic diagram of a structure for preventing condensation in a motor according to the present invention;

[0026] Figure 2 This utility model Figure 1 A magnified schematic diagram of the structure of A in the diagram;

[0027] Figure 3 This is a three-dimensional structural diagram of the isolation component of this utility model;

[0028] Figure 4 This is a schematic diagram of the existing technology showing the connection between the motor cavity and the junction box cavity;

[0029] Figure 5 This utility model Figure 4 A magnified schematic diagram of the structure of B in the diagram.

[0030] Explanation of main reference numerals: Motor cavity-1, Junction box cavity-2, Stator phase output line-3, Isolation assembly-4, Stator core-5, Stator winding-6, Upper rubber sleeve-41, Lower rubber sleeve-42, Chamber splitting rib-43. Detailed Implementation

[0031] The following detailed description of the embodiments of this utility model, in conjunction with the accompanying drawings, will provide a thorough understanding of how this utility model uses technical means to solve technical problems and achieve technical effects, enabling its implementation. It should be noted that, provided there is no conflict, the various embodiments and features within them can be combined with each other, and all resulting technical solutions are within the protection scope of this utility model.

[0032] Furthermore, numerous specific details are set forth in the following description for illustrative purposes to provide a thorough understanding of the embodiments of this invention. However, it will be apparent to those skilled in the art that this invention may be practiced without the specific details or particular methods described herein.

[0033] Please see Figure 1-5 This utility model provides a structure to prevent motor condensation, including: a motor cavity 1, a junction box cavity 2, and a stator phase output line 3. The junction box cavity 2 is connected to the motor cavity 1. One side of the stator phase output line 3 is located inside the motor cavity 1, and the other side is located inside the junction box cavity 2. An isolation component 4 is installed between the motor cavity 1 and the junction box cavity 2 and is connected to the stator phase output line 3. The isolation component 4 includes an upper rubber sleeve 41, a lower rubber sleeve 42, and a cavity-separating rib 43. The upper rubber sleeve 41 and the lower rubber sleeve 42 are spliced ​​together. One side of the stator phase output line 3 passes through the spliced ​​upper rubber sleeve 41 and lower rubber sleeve 42. The cavity-separating rib 43 is inserted into the side of the upper rubber sleeve 41 and the lower rubber sleeve 42.

[0034] During installation, the upper rubber sleeve 41, the lower rubber sleeve 42, and the cavity rib plate 43 work together to seal and isolate the stator phase output line 3 from the top and bottom, so that the motor cavity 1 and the junction box cavity 2 form two different cavities, creating physical isolation. During motor operation, the air in the motor cavity 1 is blocked and isolated by the isolation component 4, preventing hot air from reaching the junction box cavity 2, thus suppressing thermal convection. As a result, the temperature inside and outside the junction box cavity 2 reaches a relative balance, preventing the formation of condensate and effectively preventing condensation.

[0035] According to some embodiments of this application, optionally, the partition rib 43 is located between the motor cavity 1 and the junction box cavity 2. The partition rib 43, together with the upper rubber sleeve 41 and the lower rubber sleeve 42, seals the space between the motor cavity 1 and the junction box cavity 2, thus dividing the motor cavity 1 and the junction box cavity 2 into two non-communicating cavities.

[0036] According to some embodiments of this application, optionally, several stator phase output lines 3 are provided, each connected to an upper rubber sleeve 41 and a lower rubber sleeve 42. The upper rubber sleeve 41 and lower rubber sleeve 42 are connected to adjacent upper rubber sleeves 41 and lower rubber sleeves 42 through a cavity-separating rib plate 43. The upper rubber sleeves 41 and lower rubber sleeves 42 under several stator phase output lines 3 are connected together through the cavity-separating rib plate 43, so that the entire area of ​​the stator phase output lines 3 is sealed and isolated from top to bottom, thereby ensuring the separation between the motor cavity 1 and the junction box cavity 2.

[0037] According to some embodiments of this application, optionally, a stator core 5 and a stator winding 6 are housed inside the motor cavity 1, with the stator winding 6 mounted on the stator core 5. The stator core 5 and the stator winding 6 are important working components in the motor and also the main heat source.

[0038] According to some embodiments of this application, optionally, the stator phase output line 3 is connected to the stator winding 6 on one side inside the motor cavity 1. The stator winding 6 is a coil structure fixed on the stator, and the stator phase output line 3 is a wire connected to the stator winding 6 for transmitting current to generate a magnetic field or control the operation of the motor.

[0039] It should be understood that the embodiments disclosed herein are not limited to the specific processing steps or materials disclosed herein, but should be extended to equivalent substitutions of such features as understood by those skilled in the art. It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting.

[0040] The term "embodiment" in this specification refers to a specific feature or characteristic described in connection with an embodiment that is included in at least one embodiment of the present invention. Therefore, phrases or "embodiments" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0041] Furthermore, the described features or characteristics may be incorporated into one or more embodiments in any other suitable manner. In the above description, specific details, such as thickness, quantity, etc., are provided to provide a comprehensive understanding of embodiments of the present invention. However, those skilled in the art will understand that the present invention can be implemented without the aforementioned one or more specific details or may be implemented using other methods, components, materials, etc.

Claims

1. A structure for preventing condensation on a motor, characterized in that, include: Motor cavity (1); Junction box cavity (2), which is connected to motor cavity (1); The stator phase output line (3) has one side located inside the motor cavity (1) and the other side located inside the junction box cavity (2); An isolation assembly (4) is installed between the motor housing (1) and the junction box housing (2) and connected to the stator phase output wire (3); wherein, The isolation assembly (4) includes an upper rubber sleeve (41), a lower rubber sleeve (42), and a cavity rib (43). The upper rubber sleeve (41) and the lower rubber sleeve (42) are spliced ​​together. The stator phase output line (3) passes through the spliced ​​upper rubber sleeve (41) and the lower rubber sleeve (42) on one side. The cavity rib (43) is inserted into the side of the upper rubber sleeve (41) and the lower rubber sleeve (42).

2. The structure for preventing condensation on a motor according to claim 1, characterized in that, The cavity rib (43) is located between the motor cavity (1) and the junction box cavity (2).

3. A structure for preventing condensation in a motor according to claim 1 or 2, characterized in that, The stator phase output line (3) is provided with several and each is connected to an upper rubber sleeve (41) and a lower rubber sleeve (42). The upper rubber sleeve (41) and the lower rubber sleeve (42) are connected to the adjacent upper rubber sleeve (41) and lower rubber sleeve (42) through a cavity rib plate (43).

4. The structure for preventing condensation on a motor according to claim 1, characterized in that, The motor cavity (1) contains a stator core (5) and a stator winding (6), with the stator winding (6) mounted on the stator core (5).

5. The structure for preventing condensation on a motor according to claim 4, characterized in that, The stator phase output line (3) is connected to the stator winding (6) on one side inside the motor cavity (1).

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