Base structure suitable for vertical variable frequency motor with 355-630 center height

Abstract

The utility model discloses a base structure suitable for a 355-630 center height vertical variable frequency motor, which comprises a transverse wall plate, at least six vertical side plates with different sizes are fixed on the wall plate, a cylindrical structure is enclosed by the side plates with different sizes, the wall plate is arranged at the bottom of the cylindrical structure, the top of the cylindrical structure is connected with an upper-layer plate, and the upper-layer plate is connected with a lower-layer plate. The middle of the upper-layer plate is provided with an inlet of a vertical variable frequency motor with the center height of 355-630; and the outer wall of the cylindrical structure is fixedly connected with the wall plate through a plurality of rib plates. According to the utility model, by adjusting the number and the distribution mode of the side plates, the reed frequency of the 355-630 center height vertical variable frequency motor is greatly improved, the rotation frequency range of the motor is completely avoided, motor resonance does not occur in the speed regulation process of the motor, and the vibration design requirement is met.

Description

Technical Field

[0001] The utility model relates to a base structure suitable for a vertical variable frequency motor with a center height of 355-630, belonging to the technical field of vertical variable frequency motors. Background Art

[0002] 355-630 center height vertical variable frequency motors often use a squirrel cage structure, which has the advantages of simple structure, easy inspection and maintenance, and high reliability. It has a wide range of applications in the industrial field. Compared with ordinary fixed frequency motors, vertical variable frequency motors have a wide operating range. Because they need to operate at multiple speeds, they are prone to large vibrations at one or two speeds. After investigating the cause, it was found that the main reason was that the reed frequency of the motor just happened to coincide with the rotation frequency of the motor, causing the structure to resonate. The reed frequency of the motor is largely determined by the base structure (such as Figure 1 As shown, this is a base used for a conventional vertical motor. The existing method is to add ribs or thicken the steel plate to the base, but the effect on the reed frequency is small and it is difficult to avoid the entire speed regulation range. Summary of the Invention

[0003] The technical problem to be solved by the utility model is: for a 355-630 center height vertical variable frequency motor, how to solve the resonance problem during the motor speed regulation process.

[0004] In order to solve the above technical problems, the technical solution of the utility model is to provide a base structure suitable for a 355-630 center high vertical frequency conversion motor, which is characterized in that it includes a horizontal wall panel, on which at least 6 vertical side panels of different sizes are fixed, and all the side panels of different sizes form a cylindrical structure, the wall panel is arranged at the bottom of the cylindrical structure, the top of the cylindrical structure is connected to the upper plate, and the middle of the upper plate is provided with an inlet for a 355-630 center high vertical frequency conversion motor; the outer wall of the cylindrical structure and the wall panel are fixedly connected by multiple ribs.

[0005] Preferably, a plurality of hanging plates are provided on the outer wall of the cylindrical structure, and each hanging plate is provided with a hanging hole.

[0006] Preferably, the wall panel is fixed with 6 side panels of different sizes and placed vertically, which are the first side panel, the second side panel, the sixth side panel, the fifth side panel, the fourth side panel and the third side panel respectively; the second side panel, the third side panel, the sixth side panel and the fourth side panel are all provided with a lifting plate.

[0007] Preferably, the plurality of ribs are all arranged on the outer wall of the cylindrical structure near the bottom.

[0008] Preferably, the wall panel is fixed with 6 side panels of different sizes and placed vertically, which are the first side panel, the second side panel, the sixth side panel, the fifth side panel, the fourth side panel and the third side panel respectively; the second side panel, the fifth side panel and the third side panel are all provided with ribs.

[0009] Preferably, the wall panel is fixed with 6 side panels of different sizes and placed vertically, which are the first side panel, the second side panel, the sixth side panel, the fifth side panel, the fourth side panel and the third side panel respectively; windows are provided at relative positions on the second side panel and the third side panel.

[0010] Preferably, the second side panel and the third side panel have the same size and are parallel to each other, the first side panel and the fifth side panel are parallel to each other, and the sixth side panel and the fourth side panel have the same size.

[0011] Compared with the conventional vertical motor base, the utility model has a simple structure and is easy to manufacture. By adjusting the number and distribution of side plates, the reed frequency of the 355-630 center height vertical variable frequency motor is greatly improved.

[0012] For example, a 4-pole variable-frequency motor has a speed regulation range of 300r / min-1500r / min, and the corresponding rotation frequency (1 / 60 speed) is 5Hz-25Hz. The reed frequency of the conventional 355-630 center-height vertical motor is between 15Hz-25Hz, which just falls within the rotation frequency range. During the speed regulation process, the motor is very likely to resonate, causing excessive vibration.

[0013] However, if the base structure of the present invention is used, the reed frequency of the 355-630 center height vertical motor is above 30Hz, which completely avoids the rotation frequency range of the motor. During the speed regulation process, the motor will not resonate, thus meeting the vibration design requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the base used for a conventional vertical motor;

[0015] Figure 2 This is a schematic diagram of a base structure suitable for 355-630 center height vertical variable frequency motors. DETAILED DESCRIPTION

[0016] In order to make the present invention more clear and easy to understand, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0017] This utility model provides a base structure suitable for 355-630 center height vertical variable frequency motors, which improves the anti-resonance design level. Compared with conventional vertical motor bases, the base structure of this utility model is mainly improved in the side panels, and 4 side panels of similar size are improved to 6 side panels of different sizes. Figure 2 As shown, it includes a horizontal wall panel 8, to which six vertical side panels of varying sizes are fixed. These six side panels of varying sizes form a cylindrical structure, namely, the first side panel 1, the second side panel 2, the sixth side panel 6, the fifth side panel 5, the fourth side panel 4, and the third side panel 3. The wall panel 8 is located at the bottom of the cylindrical structure, and the top of the cylindrical structure is connected to the upper plate 10. The upper plate 10 has an inlet 9 for a 355-630 center height vertical variable frequency motor in the middle. The outer wall of the cylindrical structure is fixedly connected to the wall panel 8 by multiple ribs 7. The outer wall of the cylindrical structure is also provided with multiple lifting plates 12, each of which has a lifting hole 13.

[0018] In this embodiment, the thickness of the six side panels of different sizes is 12 mm. The second side panel 2 and the third side panel 3 are the same size and parallel to each other, the first side panel 1 and the fifth side panel 5 are parallel to each other, and the sixth side panel 6 and the fourth side panel 4 are the same size.

[0019] Multiple ribs 7 are located on the outer wall of the cylindrical structure, near the bottom. Ribs 7 are also provided on the second side panel 2, the fifth side panel 5, and the third side panel 3. Lifting plates 12 are also provided on the second side panel 2, the third side panel 3, the sixth side panel 6, and the fourth side panel 4. Windows 11 are also provided on the second side panel 2 and the third side panel 3 at opposing locations.

[0020] On the premise of using the same round base, when comparing a round tube with a square tube of the same thickness, the cross-sectional inertia moment of the round tube is greater than that of the square tube, and the cross-sectional inertia moment of the tube is proportional to the square of the reed frequency of the tube, so the reed frequency of the round tube is higher than that of the square tube. The six side panels of the present invention are closer to a circle than the four side panels in the prior art, so the reed frequency of the six side panels is higher than that of the four side panels, which can avoid the rotation frequency range of the motor.

Claims

1. A base structure suitable for 355-630 center height vertical variable frequency motor, characterized in that: The invention comprises a horizontally placed wall panel (8), on which at least six side panels of different sizes and placed vertically are fixed, and all the side panels of different sizes form a cylindrical structure, the wall panel (8) is arranged at the bottom of the cylindrical structure, the top of the cylindrical structure is connected to an upper plate (10), and an inlet (9) for a vertical variable frequency motor with a center height of 355-630 is arranged in the middle of the upper plate (10); the outer wall of the cylindrical structure and the wall panel (8) are fixedly connected by a plurality of rib plates (7).

2. A base structure suitable for a 355-630 center height vertical variable frequency motor as claimed in claim 1, characterized in that: A plurality of hanging plates (12) are also provided on the outer wall of the cylindrical structure, and each hanging plate (12) is provided with a hanging hole (13).

3. A base structure suitable for a 355-630 center height vertical variable frequency motor as claimed in claim 2, characterized in that: Six side panels of different sizes and placed vertically are fixed on the wall panel (8), which are respectively the first side panel (1), the second side panel (2), the sixth side panel (6), the fifth side panel (5), the fourth side panel (4), and the third side panel (3); the second side panel (2), the third side panel (3), the sixth side panel (6), and the fourth side panel (4) are all provided with a hanging plate (12).

4. A base structure suitable for a 355-630 center height vertical variable frequency motor as claimed in claim 1, characterized in that: The plurality of rib plates (7) are all arranged on the outer wall of the cylindrical structure near the bottom.

5. A base structure suitable for a 355-630 center height vertical variable frequency motor as claimed in claim 4, characterized in that: Six side panels of different sizes and placed vertically are fixed on the wall panel (8), which are respectively the first side panel (1), the second side panel (2), the sixth side panel (6), the fifth side panel (5), the fourth side panel (4), and the third side panel (3); the second side panel (2), the fifth side panel (5), and the third side panel (3) are all provided with rib panels (7).

6. A base structure suitable for a 355-630 center height vertical variable frequency motor as claimed in claim 1, characterized in that: Six side panels of different sizes and placed vertically are fixed on the wall panel (8), which are respectively the first side panel (1), the second side panel (2), the sixth side panel (6), the fifth side panel (5), the fourth side panel (4), and the third side panel (3); windows (11) are provided at relative positions on the second side panel (2) and the third side panel (3).

7. A base structure suitable for a 355-630 center height vertical variable frequency motor as described in any one of claims 3, 5 and 6, characterized in that: The second side plate (2) and the third side plate (3) have the same size and are parallel to each other, the first side plate (1) and the fifth side plate (5) are parallel to each other, and the sixth side plate (6) and the fourth side plate (4) have the same size.

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