Pre-tightening device for composite material sheath of high-speed permanent magnet motor

Abstract

The utility model relates to the technical field of high-speed permanent magnet motor sheaths, and discloses a pre-tightening device of a high-speed permanent magnet motor composite material sheath, which comprises a rotating shaft, one end of the rotating shaft is fixedly connected with a permanent magnet motor sleeve shell, one side of the permanent magnet motor sleeve shell is rotatably connected with a rotating drum, and magnetic steel is clamped on the surface of the rotating drum. The magnetic steel is distributed on the surface of the rotary drum in an array mode, the magnetic steel is symmetrically distributed with the rotary drum as the axis, a bottom layer is buckled on the upper surface of the magnetic steel, the inner wall of the bottom layer can effectively cover the outer surface of the magnetic steel, a pre-impregnation layer is buckled on the upper surface of the bottom layer, and the pre-impregnation layer can effectively cover the outer surface of the magnetic steel. The length of the prepreg layer is slightly smaller than that of the base layer, and a surface protection layer is buckled on the surface of the prepreg layer. According to the pre-tightening device for the composite material sheath of the high-speed permanent magnet motor, the limiting rod, the telescopic spring, the baffle, the adjusting nut and the like are arranged, the pre-tightening force can be freely adjusted, the pre-tightening device is formed by installing and combining a plurality of parts, and installation and maintenance are convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of high-speed permanent magnet motor sheaths, in particular to a pre-tightening device for a composite material sheath of a high-speed permanent magnet motor. Background Art

[0002] The preload device of the composite jacket of a high-speed permanent magnet motor is a key component. It is mainly used to ensure that the composite jacket can fit tightly during motor operation and provide sufficient preload force to prevent the jacket from being deformed or damaged due to centrifugal force.

[0003] The main function of the preload device is to provide a stable and uniform preload force for the composite material sheath. This preload force can ensure that the sheath can still fit tightly on the rotor when the motor rotates at high speed, preventing the sheath from falling off or shifting due to centrifugal force. At the same time, the preload device can also disperse the stress on the sheath and extend the service life of the sheath. However, the traditional method is mainly to use bolts to fix each protective layer to preload the magnetic steel. However, this method requires regular inspection and adjustment of the tightening state of the bolts. In response to the above problems, a preload device for a high-speed permanent magnet motor composite material sheath is proposed, which can freely adjust the preload force and automatically adjust the preload force according to the operating state of the motor. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a pre-tightening device for a composite material sheath of a high-speed permanent magnet motor.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-tightening device for a high-speed permanent magnet motor composite material sheath, comprising a rotating shaft, one end of the rotating shaft is fixedly connected to a permanent magnet motor casing, one side of the permanent magnet motor casing is rotatably connected to a rotating drum, a magnetic steel is clamped on the surface of the rotating drum, the magnetic steel is distributed in an array on the surface of the rotating drum, the magnetic steel is symmetrically distributed with the rotating drum as the axis, a primer layer is buckled on the upper surface of the magnetic steel, the inner wall of the primer layer can effectively cover the outer surface of the magnetic steel, a prepreg layer is buckled on the upper surface of the primer layer, the length of the prepreg layer is slightly shorter than the length of the primer layer, a surface protective layer is buckled on the surface of the prepreg layer, the length of the surface protective layer is slightly greater than the length of the prepreg layer and is the same as the length of the primer layer, the surface of the surface protective layer is provided with installation holes, and the primer layer and the prepreg layer are provided with installation holes at corresponding positions.

[0006] As a further improvement of the above scheme, a connecting plate is fixedly connected to one side of the surface protection layer, a limiting rod passes through the interior of the connecting plate, the limiting rod and the connecting plate are slidably connected, an engaging thread is provided at one end of the limiting rod, and a telescopic spring is sleeved on the surface of the limiting rod.

[0007] As a further improvement of the above scheme, one end of the telescopic spring is fixedly connected to the connecting plate, and the other end is fixedly connected to a baffle, the baffle is slidably connected to the limit rod, the surface of the engaging thread is engaged with an adjusting nut, and the adjusting nut is rotatably connected to the baffle.

[0008] As a further improvement of the above scheme, the mounting holes inside the surface protective layer, the prepreg layer and the base layer are rotatably connected with fixing bolts, and the fixing bolts extend from the surface of the protective layer to the inside of the base layer. The mounting holes on the surface of the surface protective layer, the prepreg layer and the base layer are vertically connected in position.

[0009] As a further improvement of the above solution, the engaging thread is set only at the two ends of the limiting rod and does not extend to the surface center area of ​​the limiting rod. The surface length of the baffle is greater than the circumferential diameter of the telescopic spring.

[0010] As a further improvement of the above scheme, the base layer, prepreg layer and surface protection layer are symmetrically distributed with the rotating drum as the axis, and the installation holes are symmetrically distributed at their respective levels. Two groups are set on the surface of the base layer, prepreg layer and surface protection layer, and the fixing bolts are set in the two groups of installation holes.

[0011] As a further improvement of the above scheme, the limit rod and the telescopic spring are symmetrically distributed with the rotating cylinder as the axis, the connecting plate is only fixedly connected to the two sides of the surface protection layer, and the connecting plate is horizontally arranged and is not connected to the base layer and the prepreg layer.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] 1. The pre-tightening device of the composite material sheath of this high-speed permanent magnet motor, when the magnetic steel needs to be pre-tightened, firstly, the base layer is clamped on the surface of the magnetic steel, and the surface of the magnetic steel needs to be covered, and then the prepreg layer is clamped on the surface of the base layer, and finally the surface protection layer is clamped on the surface of the prepreg layer, and then the installation holes on the surfaces of each layer are aligned, and then tightened by fixing bolts so that each layer can be combined into a whole, and then the limit rod is inserted into the inside of the connecting plate, the telescopic spring is placed on the surface of the connecting plate, and then the baffle is sleeved on the surface of the limit rod, and then the adjusting nut is tightened. At this time, the adjusting nut is rotated according to the required pre-tightening force. The deeper the adjusting nut is rotated on the meshing thread surface, the greater the potential energy of the compressed telescopic spring is, so that the pre-tightening force is greater, and vice versa.

[0014] 2. The pre-tightening device of the composite material sheath of the high-speed permanent magnet motor is assembled by installing multiple parts, which is convenient for installation and maintenance. When a part is damaged, it is convenient to replace a single part without affecting normal use, thereby reducing maintenance costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is the upper left perspective structure main view of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the utility model from the upper right perspective;

[0017] Figure 3 It is a schematic diagram of the connection mode between each level and the limit rod of the utility model;

[0018] Figure 4 This is a schematic diagram of the internal cross-section of the utility model;

[0019] Figure 5 It is a schematic diagram of the connection structure between the connecting plate and the limiting rod of the utility model.

[0020] Description of main symbols:

[0021] 1. Rotating shaft; 2. Permanent magnet motor casing; 3. Rotating drum; 4. Magnetic steel; 5. Base layer; 6. Prepreg layer; 7. Surface protection layer; 701. Connecting plate; 8. Installation hole; 9. Limit rod; 901. Engaging thread; 10. Telescopic spring; 11. Baffle; 12. Adjusting nut; 13. Fixing bolt. DETAILED DESCRIPTION

[0022] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment. Example

[0023] Please combine Figure 1-5 A pre-tightening device for a composite sheath of a high-speed permanent magnet motor of the present embodiment comprises a rotating shaft 1, one end of the rotating shaft 1 is fixedly connected to a permanent magnet motor casing 2, one side of the permanent magnet motor casing 2 is rotatably connected to a rotating drum 3, a magnetic steel 4 is clamped on the surface of the rotating drum 3, the magnetic steel 4 is distributed in an array on the surface of the rotating drum 3, the magnetic steel 4 is symmetrically distributed with the rotating drum 3 as the axis, a primer layer 5 is buckled on the upper surface of the magnetic steel 4, the inner wall of the primer layer 5 can effectively cover the outer surface of the magnetic steel 4, a prepreg layer 6 is buckled on the upper surface of the primer layer 5, the length of the prepreg layer 6 is slightly shorter than the length of the primer layer 5, a surface protective layer 7 is buckled on the surface of the prepreg layer 6, the length of the surface protective layer 7 is slightly greater than the length of the prepreg layer 6, and is the same as the length of the primer layer 5, a mounting hole 8 is opened on the surface of the surface protective layer 7, and the primer layer 5 and the prepreg layer 6 are both provided with mounting holes 8 at corresponding positions.

[0024] A connecting plate 701 is fixedly connected to one side of the surface protection layer 7, and a limiting rod 9 runs through the interior of the connecting plate 701. The limiting rod 9 and the connecting plate 701 are slidably connected. An engaging thread 901 is provided at one end of the limiting rod 9, and a telescopic spring 10 is sleeved on the surface of the limiting rod 9.

[0025] One end of the telescopic spring 10 is fixedly connected to the connecting plate 701, and the other end is fixedly connected to the baffle 11. The baffle 11 is slidably connected to the limiting rod 9. The surface of the meshing thread 901 is meshed with an adjusting nut 12, and the adjusting nut 12 is rotationally connected to the baffle 11.

[0026] The mounting holes 8 inside the surface protective layer 7, the prepreg layer 6, and the base layer 5 are rotatably connected with fixing bolts 13, and the fixing bolts 13 extend from the surface of the protective layer 7 to the inside of the base layer 5. The mounting holes 8 on the surface of the surface protective layer 7, the prepreg layer 6, and the base layer 5 are vertically connected in position.

[0027] The length of the meshing thread 901 is only set at the two ends of the limiting rod 9 and does not extend to the surface center area of ​​the limiting rod 9. The surface length of the baffle 11 is greater than the circumferential diameter of the telescopic spring 10.

[0028] The base layer 5, prepreg layer 6, and surface protection layer 7 are all symmetrically distributed with the rotating drum 3 as the axis, and the installation holes 8 are symmetrically distributed at their respective levels. Two groups are arranged on the surface of the base layer 5, prepreg layer 6, and surface protection layer 7, and fixing bolts 13 are arranged in both groups of installation holes 8.

[0029] The limiting rod 9 and the telescopic spring 10 are symmetrically distributed with the rotating drum 3 as the axis. The connecting plate 701 is only fixedly connected to the two sides of the surface protection layer 7, and the connecting plate 701 is horizontally arranged and is not connected to the base layer 5 and the prepreg layer 6.

[0030] The working principle of a pre-tightening device for a composite material sheath of a high-speed permanent magnet motor in the embodiment of the present application is as follows: when the magnetic steel 4 needs to be pre-tightened, the base layer 5 is first clamped on the surface of the magnetic steel 4, and the surface of the magnetic steel 4 needs to be covered, and then the prepreg layer 6 is clamped on the surface of the base layer 5, and finally the surface protection layer 7 is clamped on the surface of the prepreg layer 6, and then the mounting holes 8 on the surfaces of each layer are aligned, and then tightened by the fixing bolts 13 so that the layers can be combined into a whole, and then the limiting rod 9 is inserted into the inside of the connecting plate 701, and the telescopic spring 10 is placed on the surface of the connecting plate 701, and then the baffle 11 is sleeved on the surface of the limiting rod 9, and then the adjusting nut 12 is tightened. At this time, the adjusting nut 12 is rotated according to the required pre-tightening force. The deeper the adjusting nut 12 rotates on the surface of the meshing thread 901, the greater the potential energy of the compressed telescopic spring 10 is, so that the pre-tightening force is greater, and vice versa.

[0031] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pre-tightening device for a composite material sheath of a high-speed permanent magnet motor, characterized in that: The invention comprises a rotating shaft (1), one end of the rotating shaft (1) is fixedly connected to a permanent magnet motor casing (2), one side of the permanent magnet motor casing (2) is rotatably connected to a rotating drum (3), a surface of the rotating drum (3) is clamped with magnetic steel (4), the magnetic steel (4) is distributed in an array on the surface of the rotating drum (3), the magnetic steel (4) is symmetrically distributed with the rotating drum (3) as the axis, the upper surface of the magnetic steel (4) is buckled with a base layer (5), the inner wall of the base layer (5) can effectively cover the outer surface of the magnetic steel (4), The upper surface of the base layer (5) is buckled with a prepreg layer (6), the length of the prepreg layer (6) is slightly shorter than the length of the base layer (5), the surface of the prepreg layer (6) is buckled with a surface protection layer (7), the length of the surface protection layer (7) is slightly longer than the length of the prepreg layer (6) and is the same as the length of the base layer (5), the surface of the surface protection layer (7) is provided with mounting holes (8), and the base layer (5) and the prepreg layer (6) are both provided with mounting holes (8) at corresponding positions.

2. A pre-tightening device for a composite material sheath of a high-speed permanent magnet motor as claimed in claim 1, characterized in that: A connecting plate (701) is fixedly connected to one side of the surface protection layer (7), a limiting rod (9) passes through the interior of the connecting plate (701), the limiting rod (9) and the connecting plate (701) are slidably connected, an engaging thread (901) is provided at one end of the limiting rod (9), and a telescopic spring (10) is sleeved on the surface of the limiting rod (9).

3. A pre-tightening device for a composite material sheath of a high-speed permanent magnet motor as claimed in claim 2, characterized in that: One end of the telescopic spring (10) is fixedly connected to the connecting plate (701), and the other end is fixedly connected to a baffle (11); the baffle (11) is slidably connected to the limit rod (9); an adjusting nut (12) is meshed on the surface of the meshing thread (901); and the adjusting nut (12) is rotatably connected to the baffle (11).

4. A pre-tightening device for a composite material sheath of a high-speed permanent magnet motor as claimed in claim 1, characterized in that: A fixing bolt (13) is rotatably connected to the mounting holes (8) inside the surface protection layer (7), the prepreg layer (6), and the base layer (5); the fixing bolt (13) extends from the surface of the protection layer (7) to the inside of the base layer (5); and the mounting holes (8) on the surfaces of the surface protection layer (7), the prepreg layer (6), and the base layer (5) are vertically connected in position.

5. The pre-tightening device for the composite material sheath of a high-speed permanent magnet motor according to claim 3, characterized in that: The engagement thread (901) is arranged to have a length distance only at the two ends of the limiting rod (9) and does not extend to the surface center area of ​​the limiting rod (9); the surface length of the baffle (11) is greater than the circumferential diameter of the telescopic spring (10).

6. A pre-tightening device for a composite material sheath of a high-speed permanent magnet motor as claimed in claim 4, characterized in that: The base layer (5), prepreg layer (6), and surface protective layer (7) are all symmetrically distributed with the rotating drum (3) as the axis, and the mounting holes (8) are symmetrically distributed at their respective levels. Two groups are arranged on the surface of the base layer (5), prepreg layer (6), and surface protective layer (7), and the fixing bolts (13) are arranged in both groups of mounting holes (8).

7. A pre-tightening device for a composite material sheath of a high-speed permanent magnet motor as claimed in claim 2, characterized in that: The limiting rod (9) and the telescopic spring (10) are symmetrically distributed with the rotating drum (3) as the axis, the connecting plate (701) is only fixedly connected to the two sides of the surface protection layer (7), and the connecting plate (701) is arranged horizontally and is not connected to the base layer (5) and the prepreg layer (6).

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