High-speed dynamometer motor

Abstract

The utility model relates to the technical field of high-speed motor power testing equipment, and relates to a high-speed dynamometer motor, which comprises a motor base, a dynamometer motor is arranged on the motor base, and a sealing mechanism is arranged at the front end of the dynamometer motor. The sealing mechanism comprises a sealing cover fixedly arranged at the front end of the dynamometer motor and a transition shaft rotationally arranged in the sealing cover, one end of the transition shaft penetrates through the sealing cover and is in transmission connection with the output end of the dynamometer motor, a sealing cavity is formed in the sealing cover, a sealing fan blade is fixedly arranged on the transition shaft, and the sealing fan blade is in transmission connection with the sealing cover. And the sealing fan blade is arranged in the sealing cavity. According to the utility model, the sealing mechanism is arranged on the outer side of the motor, so that a negative pressure environment is formed in the motor in the use process to balance external negative pressure, lubricating oil of the dynamometer motor is prevented from flowing out from the interior of the dynamometer motor, the use requirement of high-speed dynamometer is met, and the service life of equipment is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed motor power testing equipment, in particular to a high-speed dynamometer motor. Background Art

[0002] As the main component of new energy vehicles, the performance and control of the new energy drive system directly affect the performance of the vehicle. At present, the electric drive system with a speed of more than 20,000 rpm will become the key research and development area of ​​each company in the market, so it is urgent to develop a test bench system that can meet the test of the electric drive system.

[0003] Patent No. CN203732190U discloses a dynamometer for high-speed motors, in which the output shaft of the driving motor is installed into the shaft hole at the right end of the coupling, the lower end pin of the locking device is inserted into the radial hole at the right end of the coupling, and the bottom end of the pin is against the output shaft of the driving motor. The flanges at both ends of the torque sensor are respectively connected to the left end flange of the coupling and the right end flange of the transmission shaft of the intermediate support seat with bolts, and the left end housing of the aforementioned intermediate support seat is connected to the fixture with another bolt, and the left end of the transmission shaft of the intermediate support seat extends out of the housing. The requirements of high-speed operation, rapid response, stable and reliable operation during the test are fully considered, and the overall layout is simple, compact and reasonable, easy to install, and the test data is stable and accurate.

[0004] The above-mentioned dynamometer dedicated to high-speed motors has the following problems: due to the high rotation speed of the dynamometer motor, the front end of the motor output shaft will cause gas flow during rotation, thereby forming a negative pressure environment in front of the output end of the dynamometer motor, causing the lubricating oil in the dynamometer motor to flow out from the inside of the motor under the action of negative pressure, ultimately causing the motor to wear and affecting the service life of the equipment. Utility Model Content

[0005] The utility model provides a high-speed dynamometer motor to solve the problems of the prior art.

[0006] The purpose of the utility model can be achieved through the following technical solutions: a high-speed dynamometer motor, including a motor base, a dynamometer motor is provided on the motor base, a sealing mechanism is provided at the front end of the dynamometer motor, the sealing mechanism includes a sealing cover fixedly arranged at the front end of the dynamometer motor and a transition shaft rotatably arranged inside the sealing cover, one end of the transition shaft passes through the sealing cover and is transmission-connected to the output end of the dynamometer motor, a sealing cavity is provided inside the sealing cover, a sealing fan blade is fixedly arranged on the transition shaft, and the sealing fan blade is arranged in the sealing cavity.

[0007] A further improvement is that the transition shaft includes a connecting shaft body and a fixed disk, the connecting shaft body is rotatably set in the sealing cover and one end extends outward, the end of the extended part of the connecting shaft body is provided with an assembly hole, the fixed disk is rotatably set in the sealing cavity and the sealing fan blade is fixedly set on the side of the fixed disk away from the dynamometer motor.

[0008] As a further improvement, the sealed cavity comprises a first sealed cavity and a second sealed cavity, and the sealed fan blade is rotatably disposed in the first sealed cavity.

[0009] As a further improvement, an oil return chamber is provided between a side of the sealing chamber close to the dynamometer motor and the end of the transition shaft, an oil return channel is provided at the end of the sealing cover, and the oil return channel and the oil return chamber are connected.

[0010] As a further improvement, the oil return channels are provided in multiple groups.

[0011] As a further improvement, a plurality of first mounting holes are provided through the fixing plate, and bolts are provided in the first mounting holes for transmission connection between the transition shaft and the output end of the dynamometer motor.

[0012] As a further improvement, a plurality of second mounting holes are provided through the outer side of the sealing cover, and bolts are provided in the second mounting holes for fixing the sealing cover on the dynamometer motor.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model has a simple structure, and during use, the sealing fan blades rotate synchronously with the transition shaft in the sealing chamber, and the sealing fan blades form a negative pressure environment in the sealing chamber during rotation. The negative pressure environment in the sealing chamber is used to balance the negative pressure environment at the front end of the transition shaft, thereby preventing the lubricating oil of the dynamometer motor from flowing out of the dynamometer motor, so that it meets the use requirements of high-speed dynamometer and extends the service life of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structure of the utility model;

[0015] Figure 2 It is an exploded view of the sealing mechanism of the utility model;

[0016] Figure 3 It is a structural schematic diagram of the sealing mechanism of the utility model;

[0017] Figure 4 It is a cross-sectional view of the sealing mechanism of the utility model;

[0018] Figure 5 For this utility model Figure 4 Enlarged view of part A in the figure.

[0019] In the figure, 1. motor base; 2. dynamometer motor; 3. sealing mechanism; 31. sealing cover; 311. sealing cavity; 3111. first sealing cavity; 3112. second sealing cavity; 312. oil return cavity; 313. oil return channel; 314. second mounting hole; 32. transition shaft; 321. connecting shaft body; 3211. assembly hole; 322. fixing plate; 3221. first mounting hole; 41. sealing fan blade. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. 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] Below is a combination of the embodiments and the attached Figures 1 to 5 , the technical solution of the utility model is further elaborated.

[0023] Example 1

[0024] A high-speed dynamometer motor comprises a motor base 1, on which a dynamometer motor 2 is provided, a sealing mechanism 3 is provided at the front end of the dynamometer motor 2, the sealing mechanism 3 comprises a sealing cover 31 fixedly provided at the front end of the dynamometer motor 2 and a transition shaft 32 rotatably provided inside the sealing cover 31, one end of the transition shaft 32 passes through the sealing cover 31 and is transmission-connected to the output end of the dynamometer motor 2, a sealing cavity 311 is provided inside the sealing cover 31, a sealing fan blade 41 is fixedly provided on the transition shaft 32, and the sealing fan blade 41 is provided in the sealing cavity 311.

[0025] During actual use of existing dynamometer motors, the front end of the motor output shaft will cause gas flow during rotation, thereby forming a negative pressure environment in front of the dynamometer motor output end, causing the lubricating oil in the dynamometer motor to flow out from the inside of the motor under the action of negative pressure, ultimately causing the motor to wear and affecting the service life of the equipment.

[0026] like Figures 1 to 5As shown, the utility model has a simple structure. During use, the sealing fan blade 41 rotates synchronously with the transition shaft 32 in the sealing chamber 311. The sealing fan blade 41 forms a negative pressure environment in the sealing chamber 311 during rotation. The negative pressure environment in the sealing chamber 311 is used to balance the negative pressure environment at the front end of the transition shaft 32, thereby preventing the lubricating oil of the dynamometer motor 2 from flowing out from the inside of the dynamometer motor 2, so that it meets the use requirements of high-speed dynamometer and extends the service life of the equipment.

[0027] As a further preferred embodiment, the transition shaft 32 includes a connecting shaft body 321 and a fixed disk 322, the connecting shaft body 321 is rotatably set in the sealing cover 31 and one end extends outward, and an assembly hole 3211 is set at the end of the extended part of the connecting shaft body 321, the fixed disk 322 is rotatably set in the sealing cavity 311 and the sealing fan blade 41 is fixedly set on the side of the fixed disk 322 away from the dynamometer motor 2.

[0028] Specifically, Figure 2 and 4 As shown, during use, it is connected to the motor to be tested through the assembly hole 3211, with a simple structure and convenient operation.

[0029] As a further preferred embodiment, the sealing cavity 311 includes a first sealing cavity 3111 and a second sealing cavity 3112, and the sealing fan blade 41 is rotatably arranged in the first sealing cavity 3111. By setting two groups of sealing cavities, the sealing effect is further improved.

[0030] As a further preferred embodiment, an oil return chamber 312 is provided between the side of the sealing chamber 311 close to the dynamometer motor 2 and the end of the transition shaft 32, and an oil return channel 313 is provided at the end of the sealing cover 31, and the oil return channel 313 and the oil return chamber 312 are connected.

[0031] Specifically, Figure 3 and 4 As shown, during actual use, the overflowed lubricating oil flows back through the oil return channel 313, further improving the service life of the equipment.

[0032] As a further preferred embodiment, the oil return channels 313 are provided in multiple groups.

[0033] As a further preferred embodiment, a plurality of first mounting holes 3221 are provided through the fixing plate 322, and bolts are provided in the first mounting holes 3221 for transmission connection between the transition shaft 32 and the output end of the dynamometer motor 2, which has a simple structure and is convenient for later maintenance and repair.

[0034] As a further preferred embodiment, a plurality of second mounting holes 314 are provided through the outer side of the sealing cover 31. Bolts are provided in the second mounting holes 314 for fixing the sealing cover 31 on the dynamometer motor 2. The structure is simple and convenient for later maintenance and repair.

[0035] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A high-speed dynamometer motor, comprising a motor base (1), wherein the motor base (1) is provided with a dynamometer motor (2), characterized in that: A sealing mechanism (3) is provided at the front end of the dynamometer motor (2), the sealing mechanism (3) comprising a sealing cover (31) fixedly arranged at the front end of the dynamometer motor (2) and a transition shaft (32) rotatably arranged inside the sealing cover (31), one end of the transition shaft (32) passes through the sealing cover (31) and is drivingly connected to the output end of the dynamometer motor (2), a sealing cavity (311) is provided inside the sealing cover (31), a sealing fan blade (41) is fixedly arranged on the transition shaft (32), and the sealing fan blade (41) is arranged in the sealing cavity (311).

2. A high-speed dynamometer motor according to claim 1, characterized in that: The transition shaft (32) comprises a connecting shaft body (321) and a fixed disk (322); the connecting shaft body (321) is rotatably arranged in the sealing cover (31) and one end of the connecting shaft body (321) is extended outwardly; a mounting hole (3211) is arranged at the end of the extended portion of the connecting shaft body (321); the fixed disk (322) is rotatably arranged in the sealing cavity (311) and the sealing fan blade (41) is fixedly arranged on a side of the fixed disk (322) away from the dynamometer motor (2).

3. A high-speed dynamometer motor according to claim 2, characterized in that: The sealed cavity (311) comprises a first sealed cavity (3111) and a second sealed cavity (3112), and the sealed fan blade (41) is rotatably disposed in the first sealed cavity (3111).

4. A high-speed dynamometer motor according to claim 1, characterized in that: An oil return chamber (312) is provided between a side of the sealing chamber (311) close to the dynamometer motor (2) and an end of the transition shaft (32), an oil return channel (313) is provided at the end of the sealing cover (31), and the oil return channel (313) and the oil return chamber (312) are connected.

5. A high-speed dynamometer motor according to claim 4, characterized in that: The oil return channels (313) are provided in multiple groups.

6. A high-speed dynamometer motor according to claim 2, characterized in that: The fixing plate (322) is provided with a plurality of first mounting holes (3221) extending therethrough, and bolts are provided in the first mounting holes (3221) for transmission connection between the transition shaft (32) and the output end of the dynamometer motor (2).

7. A high-speed dynamometer motor according to claim 1, characterized in that: A plurality of second mounting holes (314) are provided through the outside of the sealing cover (31), and bolts are provided in the second mounting holes (314) for fixing the sealing cover (31) on the dynamometer motor (2).

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