Motor protection device in vacuum environment

Abstract

A motor protection device in a vacuum environment belongs to the technical field of wind tunnel tests. According to the invention, the problem that the permanent damage to the motor is easily caused if the vacuum injection time in the hypersonic wind tunnel is long at present is solved. The device comprises a motor protection shell, quick plugs, an air inlet pipe and a measurement and exhaust pipe, a motor is installed in the motor protection shell, the two quick plugs are installed on the motor protection shell, the air inlet pipe is communicated with the interior of the motor protection shell through one quick plug, and the measurement and exhaust pipe is communicated with the interior of the motor protection shell through the other quick plug. According to the motor protection device in the vacuum environment, on the premise that the atmosphere does not leak into a wind tunnel environment, the service life of the motor in the vacuum environment is prolonged, and the fault rate of the motor in the vacuum condition is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of wind tunnel tests, and in particular relates to a motor protection device in a vacuum environment. Background Art

[0002] When vacuum injection is performed in a hypersonic wind tunnel, the entire machine is in a high vacuum environment. If the injection time is long, the motor will have no air flow under vacuum conditions, resulting in poor heat dissipation and easy temperature increase. Under high temperature conditions, the torque generated by the motor will decrease, the wire will soften, and even permanent damage will be caused to the motor.

[0003] Therefore, the present application proposes a motor protection device in a vacuum environment to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that if the vacuum injection time in the hypersonic wind tunnel is too long, it is easy to cause permanent damage to the motor. A brief overview of the present invention is given below to provide a basic understanding of certain aspects of the present invention. It should be understood that this overview is not an exhaustive overview of the present invention. It is not intended to identify the key or important parts of the present invention, nor is it intended to limit the scope of the present invention.

[0005] The technical solution of the present invention:

[0006] A motor protection device for a vacuum environment comprises a motor protection shell, a quick plug, an air intake pipe and a measuring and exhaust pipe. The motor is installed in the motor protection shell. Two quick plugs are installed on the motor protection shell. The air intake pipe is connected to the interior of the motor protection shell through one quick plug, and the measuring and exhaust pipe is connected to the interior of the motor protection shell through another quick plug.

[0007] Furthermore, the left and right sides of the motor protection shell are respectively provided with side panels, the front end of the motor protection shell is provided with a front end panel, and the rear end of the motor protection shell is provided with a rear end panel, and two quick plugs are installed on the rear end panel.

[0008] Furthermore, the motor shaft of the motor passes through the front end plate and is arranged on the outside of the motor protective housing. A fixed pressure plate and a rotating sealing pressure plate are sequentially mounted on the motor shaft. The fixed pressure plate is mounted on the front end plate by screws. A rotating sealing frame is mounted on the fixed pressure plate. The rotating sealing pressure plate is pressed against the fixed pressure plate by the rotating sealing frame.

[0009] Furthermore, an opening is processed on the front end plate, a penetration sealing frame is installed on the opening of the front end plate, a penetration seal is provided on the penetration sealing frame, and the motor cable of the motor passes through the penetration seal and is arranged on the outside of the motor protective housing.

[0010] Furthermore, a rubber ring is provided at the connection between the rear end plate and the side plate.

[0011] Furthermore, a rubber ring is provided at the connection between the fixed pressure plate and the front end plate.

[0012] Furthermore, a rubber ring is provided at the connection between the penetration sealing frame and the front end plate.

[0013] The present invention has the following beneficial effects:

[0014] 1. A motor protection device in a vacuum environment of the present invention forms a sealed and ventilated environment through the cavity formed by the motor mounting shell, and the arrangement of the air inlet pipe and the measuring and exhaust pipes, thereby improving the surrounding environment of the vacuum motor to the atmospheric environment. At the same time, the atmosphere does not leak into the wind tunnel environment, and does not affect the overall vacuum degree, thereby increasing the service life of the motor in the vacuum environment and reducing the failure rate of the motor under vacuum conditions.

[0015] 2. The motor protection device for a vacuum environment of the present invention designs a new form of protection for the motor in the wind tunnel. Rubber rings are respectively arranged between the rear end plate and the side plate, the front end plate and the fixed pressure plate and the penetration sealing frame, thereby further improving the overall sealing of the protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a plan cross-sectional view of a motor protection device in a vacuum environment;

[0017] Figure 2 yes Figure 1 A partial schematic diagram of .

[0018] In the figure: 1-motor protection housing, 2-rotating sealing pressure plate, 3-motor, 4-penetrating sealing frame, 5-front end plate, 6-motor cable, 7-penetrating seal, 8-side plate, 9-fixed pressure plate, 10-screw, 11-rotating sealing frame, 12-quick plug, 13-intake pipe, 14-measuring and exhaust pipe, 15-rubber ring, 16-rear end plate, 17-motor shaft. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is described below by the specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are only exemplary and are not intended to limit the scope of the present invention. In addition, in the following description, the description of well-known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0020] The connection mentioned in the present invention is divided into fixed connection and detachable connection. The fixed connection (i.e., non-detachable connection) includes but is not limited to conventional fixed connection methods such as folding connection, rivet connection, bonding connection and welding connection. The detachable connection includes but is not limited to conventional detachable methods such as threaded connection, snap connection, pin connection and hinge connection. When the specific connection method is not clearly defined, it is assumed that at least one connection method can always be found in the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example: welding connection is selected for fixed connection, and hinge connection is selected for detachable connection.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Embodiment 1, combination Figure 1-Figure 2 The present embodiment is described. The present embodiment is a motor protection device in a vacuum environment, comprising a motor protection housing 1, a quick plug 12, an air intake pipe 13 and a measuring and exhaust pipe 14. The motor 3 is installed in the motor protection housing 1. Two quick plugs 12 are installed on the motor protection housing 1. The air intake pipe 13 is connected to the interior of the motor protection housing 1 through a quick plug 12, and the measuring and exhaust pipe 14 is connected to the interior of the motor protection housing 1 through another quick plug 12.

[0023] The motor protection housing 1, which is composed of a front end plate 5, a side plate 8, and a rear end plate 16, has a chamber inside which the motor 3 can be placed. The motor 3 is installed on the motor protection housing 1 through a plurality of bolt connectors. A rubber ring 15 is provided at the connection between the rear end plate 16 and the side plate 8. Under the action of the rubber ring 15, the overall sealing effect of the protection device is improved. Two threaded interfaces are provided on the rear end plate 16, and a quick plug 12 is threadedly connected to each threaded interface. The air intake pipe 13 is connected to the interior of the chamber through a quick plug 12, and the measurement and exhaust pipe 14 is connected to the interior of the chamber through another quick plug 12. The other ends of the air intake pipe 13 and the measurement and exhaust pipe 14 are led out of the wind tunnel test area and connected to the atmospheric environment.

[0024] The measurement and exhaust pipe 14 is divided into two paths outside the wind tunnel through a T-shaped tee, one path is connected to the pressure sensor, and the other path is connected to the atmospheric environment. When the pressure value measured by the pressure sensor meets the use requirements, the protective device is naturally aspirated, and the atmosphere naturally enters the motor protection shell 1. When the vacuum degree of the pressure sensor is too high, a press is used to connect the air intake pipe 13 so that the environment meets the use requirements. At the same time, the air discharged into the cavity through the press and the air intake pipe 13 can also achieve an air cooling effect, thereby reducing the temperature of the motor 3 and avoiding the motor from working under high temperature conditions.

[0025] The motor shaft 17 of the motor 3 passes through the front end plate 5 and is arranged on the outer side of the front end plate 5. A fixed pressure plate 9 and a rotating sealing pressure plate 2 are mounted on the motor shaft 17. The fixed pressure plate 9 is connected to the front end plate 5 by screws 10. A rubber ring 15 is installed at the connection between the fixed pressure plate 9 and the front end plate 5. The rubber ring 15 improves the sealing between the motor shaft 17 and the front end plate 5. The spacing between the motor shaft 17 and the front end plate 5 and the fixed pressure plate 9 is 1 mm. The rotating sealing frame 11 is rotationally sealed and attached to the motor shaft 17, and then the rotating sealing frame 11 is pressed tightly by the rotating sealing pressure plate 2.

[0026] An opening is processed on the front end plate 5, and the opening is used for the extension of the motor cable 6. The penetration sealing frame 4 is fixed to the outside of the opening of the front end plate 5 by multiple bolt connectors. A rubber ring 15 is arranged between the penetration sealing frame 4 and the front end plate 5. The rubber ring 15 improves the sealing effect between the penetration sealing frame 4 and the front end plate 5. A penetration seal 7 is arranged on the penetration sealing frame 4, and the motor cable 6 passes through the penetration seal 7 and is arranged on the outside of the front end plate 5.

[0027] This embodiment is only an exemplary description of the present invention and does not limit its protection scope. Those skilled in the art may also make partial changes thereto. As long as they do not exceed the spirit of the present invention, they are within the protection scope of the present invention.

Claims

1. A motor protection device in a vacuum environment, characterized in that: The invention comprises a motor protection housing (1), a quick plug (12), an air intake pipe (13) and a measuring and exhaust pipe (14); the motor (3) is installed in the motor protection housing (1); two quick plugs (12) are installed on the motor protection housing (1); the air intake pipe (13) is connected to the interior of the motor protection housing (1) through one quick plug (12); and the measuring and exhaust pipe (14) is connected to the interior of the motor protection housing (1) through another quick plug (12).

2. The motor protection device in a vacuum environment according to claim 1, characterized in that: The motor protection housing (1) has side panels (8) on its left and right sides respectively, the front end of the motor protection housing (1) has a front end panel (5), the rear end of the motor protection housing (1) has a rear end panel (16), and two quick plugs (12) are mounted on the rear end panel (16).

3. The motor protection device in a vacuum environment according to claim 2, characterized in that: The motor shaft (17) of the motor (3) passes through the front end plate (5) and is arranged on the outside of the motor protection housing (1). A fixed pressure plate (9) and a rotating sealing pressure plate (2) are sequentially mounted on the motor shaft (17). The fixed pressure plate (9) is mounted on the front end plate (5) by means of screws (10). A rotating sealing frame (11) is mounted on the fixed pressure plate (9). The rotating sealing pressure plate (2) is pressed against the fixed pressure plate (9) by means of the rotating sealing frame (11).

4. The motor protection device in a vacuum environment according to claim 3, characterized in that: The front end plate (5) is processed with an opening, the penetration seal frame (4) is installed on the opening of the front end plate (5), the penetration seal frame (4) is provided with a penetration seal (7), and the motor cable (6) of the motor (3) passes through the penetration seal (7) and is arranged on the outside of the motor protective housing (1).

5. The motor protection device in a vacuum environment according to claim 2 or 4, characterized in that: A rubber ring (15) is provided at the connection between the rear end plate (16) and the side plate (8).

6. The motor protection device in a vacuum environment according to claim 3 or 4, characterized in that: A rubber ring (15) is provided at the connection between the fixed pressing plate (9) and the front end plate (5).

7. The motor protection device in a vacuum environment according to claim 4, characterized in that: A rubber ring (15) is provided at the connection between the penetration sealing frame (4) and the front end plate (5).

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