Large synchronous motor stator limiting combination key structure

Abstract

The invention aims to provide a large-scale synchronous motor stator limiting combination key structure, a middle plate (11) is fixed on a bottom plate (13) through a middle plate bolt (10), two sides of the middle plate (11) are respectively provided with a set of symmetrical combination keys, two ends of the middle plate (11) are respectively clamped with first taper keys (1) of the two sets of combination keys, and the middle plate (11) is fixed on the bottom plate (13). The first taper key (1), the second taper key (2) and the two sets of stator limiting combination keys jointly limit the relative displacement distance between the machine base (12) and the bottom plate (13), and the keys (8) are fixed in key grooves of the bottom plate (13) through hexagonal fillister head screws (7). Displacement of the stator and the bottom plate in the operation process of the motor can be effectively reduced, stability of the motor is improved, and the service life of the motor is prolonged.

Description

Technical Field

[0001] The invention relates to a stator limit combination key structure for a large synchronous motor. Background Art

[0002] In the field of motor manufacturing technology, the displacement of the stator and base plate of large synchronous motors during operation is an important issue. This displacement will cause the performance of the motor to deteriorate and the air gap between the stator and rotor to change, resulting in vibration caused by unilateral magnetic pull fluctuations, and may even cause damage to the motor. When controlling the displacement of the stator and base plate during operation, large synchronous motors are usually fixed with only multiple bolts, but this places high demands on bolt anti-loosening and periodic inspection. Therefore, how to effectively reduce the displacement of the stator and base plate during operation of the motor and improve the operating stability and service life of the motor is a problem that has been studied in the field of motor manufacturing technology. Summary of the invention

[0003] The purpose of the present invention is to provide a large synchronous motor stator limit combination key structure with strong adaptability, low maintenance cost, and improved motor stability and motor service life. The technical solution of the present invention is: a large synchronous motor stator limit combination key structure, which is composed of a first oblique key (1), a second oblique key (2), a hexagonal bolt (3), a limit plate (4), a hexagon socket head screw (5), a cover plate (6), a hexagon socket head screw (7), a key (8), a cover plate bolt (9), and an intermediate plate bolt (10) to form a limit combination key structure, wherein the intermediate plate (11) is fixed to the bottom plate (13) by the intermediate plate bolt (10), and a set of symmetrical combination keys are installed on both sides of the intermediate plate (11), and the two ends of the intermediate plate (11) are respectively clamped with the first oblique keys (1) of the two sets of combination keys, and the bottom plate (13) on both sides of the machine base (12) is equipped with a combination key. The stator limit combination key used includes: a first oblique key (1) and a second oblique key (2). The two sets of stator limit combination keys jointly limit the relative displacement distance between the machine base (12) and the base plate (13). The key (8) is fixed in the keyway of the base plate (13) by a hexagonal cylindrical head screw (7). The first oblique key (1) and the second oblique key (2) are driven into the gap between the key (8) and the machine base (12) in pairs to tighten the machine base (12). The limit plate (4) is fixed to the end face of the key (8) by a hexagonal cylindrical head screw (5). The hexagonal bolt (3) is fitted into the screw hole of the limit plate (4) and tightens the second oblique key (2). The cover plate (6) is fixed to the upper end of the key (8) by a cover plate bolt (9).

[0004] Working principle of the present invention:

[0005] Pairs of stator limit combination keys are installed on the bottom plates on both sides of the machine base (12). The key (8) is fixed in the keyway of the bottom plate (13) by means of a hexagonal cylindrical head screw (7). The first oblique key (1) and the second oblique key (2) are driven into the gap between the key (8) and the machine base (12) in pairs to tighten the machine base (12). The limit plate (4) is fixed to the end face of the key (8) by means of a hexagonal cylindrical head screw (5). The hexagonal bolt (3) is fitted with the screw hole of the limit plate (4) and tightens the second oblique key (2). The two ends of the intermediate plate (11) are respectively clamped with the first oblique keys (1) of the two sets of combination keys to tighten the first oblique key (1), thereby limiting the axial movement of the first oblique key (1) and the second oblique key (2) and maintaining the tightened state of the machine base (12).

[0006] The cover plate (6) and the upper end of the key (8) are fixed by a cover plate bolt (9) to limit the up and down movement of the first oblique key (1) and the second oblique key (2) and to maintain the machine base (12) in a tightened state.

[0007] Advantages of the present invention:

[0008] 1. Improve the stability and service life of the motor: Compared with the traditional structure that only relies on bolts to limit the machine base, the combination key device of the present invention is added on both sides of the machine base. The two matching oblique keys can effectively limit the displacement of the machine base, and there are comprehensive oblique key anti-loosening measures, which can effectively improve the stability of the motor and extend the service life of the motor. The connecting bolts between the machine base and the base plate are also less likely to loosen.

[0009] 2. Make the air gap between the stator and the rotor more uniform when the motor is running: Compared with the traditional structure that only relies on bolts to limit the machine base, the combination key device of the present invention is added on both sides of the machine base. The two matching oblique keys can effectively limit the displacement of the machine base, making the air gap between the stator and the rotor more uniform when the motor is running, and can effectively reduce the unilateral magnetic pull fluctuation caused by the air gap change, thereby reducing the vibration of the motor caused by the unilateral magnetic pull fluctuation.

[0010] 3. Strong adaptability: The combination key device of the present invention is reasonably designed. It only needs to open a key slot and a screw hole for fixing the key (8) on the bottom plate. It has no effect on the overall structure of the motor and can adapt to large motors of different models. The present invention has strong adaptability.

[0011] 4. Reduce maintenance costs: The two matching oblique keys can effectively limit the displacement of the machine base, and there are comprehensive oblique key anti-loosening measures to reduce the shear force on the connecting bolts between the machine base and the base plate. The relative displacement between the machine base and the base plate is reduced, making it more difficult for the connecting bolts between the machine base and the base plate to loosen, which can appropriately extend the maintenance cycle.

[0012] 5. Easy installation and positioning after maintenance: When disassembling and repairing, the combination key of the present invention can be used for positioning to better determine the original position of the base, which is conducive to maintaining the original performance of the motor after maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 A top view of the present invention

[0014] Figure 2 The front view of the present invention

[0015] Figure 3 It is the left view of the present invention

[0016] Figure 4 B is a cross-sectional view of the present invention

[0017] Figure 5 C sectional view of the present invention DETAILED DESCRIPTION

[0018] like Figure 1 The shown embodiment shows a large synchronous motor stator limit combination key structure, which is composed of a first oblique key 1, a second oblique key 2, a hexagonal bolt 3, a limit plate 4, a hexagon socket head screw 5, a cover plate 6, a hexagon socket head screw 7, a key 8, a cover plate bolt 9, and an intermediate plate bolt 10.

[0019] like Figure 2 As shown, the middle plate 11 is fixed to the bottom plate 13 by the middle plate bolts 10, and a set of symmetrical combination keys are installed on both sides of the middle plate 11. The two ends of the middle plate 11 are respectively clamped with the first oblique keys 1 of the two sets of combination keys, and the bottom plates 13 on both sides of the base 12 are equipped with paired stator limit combination keys: the first oblique key 1 and the second oblique key 2. The two sets of stator limit combination keys jointly limit the relative displacement distance between the base 12 and the bottom plate 13.

[0020] like Figure 4 As shown, the key 8 is fixed in the keyway of the base plate 13 by a hexagonal cylindrical head screw 7; the first oblique key 1 and the second oblique key 2 are driven into the gap between the key 8 and the base 12 in pairs to tighten the base 12.

[0021] like Figure 3 As shown, the limit plate 4 is fixed to the end face of the key 8 by a hexagon socket head screw 5, and the hexagon bolt 3 is fitted into the screw hole of the limit plate 4 and tightens the second oblique key 2 to prevent the first oblique key 1 and the second oblique key 2 from axial displacement.

[0022] like Figure 5 As shown, the cover plate 6 and the upper end of the key 8 are fixed with cover plate bolts 9 to prevent the first oblique key 1 and the second oblique key 2 from moving up and down.

Claims

1. A large synchronous motor stator limit combination key structure, characterized by: A limit combination key structure is formed by a first oblique key (1), a second oblique key (2), a hexagonal bolt (3), a limit plate (4), a hexagon socket head screw (5), a cover plate (6), a hexagon socket head screw (7), a key (8), a cover plate bolt (9), and an intermediate plate bolt (10). The intermediate plate (11) is fixed to a bottom plate (13) by the intermediate plate bolt (10). A set of symmetrical combination keys are respectively installed on both sides of the intermediate plate (11). The two ends of the intermediate plate (11) are respectively clamped with the first oblique keys (1) of the two sets of combination keys. The bottom plates (13) on both sides of the machine base (12) are equipped with stator limit combination keys used in pairs: the first The oblique key (1), the second oblique key (2), and the two sets of stator limit combination keys jointly limit the relative displacement distance between the machine base (12) and the base plate (13); the key (8) is fixed in the keyway of the base plate (13) by a hexagonal cylindrical head screw (7); the first oblique key (1) and the second oblique key (2) are driven into the gap between the key (8) and the machine base (12) in pairs to tighten the machine base (12); the limit plate (4) is fixed to the end face of the key (8) by a hexagonal cylindrical head screw (5); the hexagonal bolt (3) is fitted with the screw hole of the limit plate (4) and tightens the second oblique key (2); the cover plate (6) and the upper end of the key (8) are fixed by a cover plate bolt (9).

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