CN201118321Y - G roller table frequency conversion asynchronous motor anti-corrosion sealing device - Google Patents

Abstract

The utility model discloses an anti-corrosion sealing device for a G roller table frequency conversion asynchronous motor. The upper bearing, the bearing cap on the outer side of the bearing and the sealing ring on the inner side of the bearing cap, the position of the inner ring hole of the water retaining plate at the outer end of the motor shaft is equipped with a labyrinth water throwing plate, which is tightly matched with the motor shaft, and the outer circle of the flange is It is matched with the inner ring hole of the water retaining plate with a small gap, and a sealing ring is respectively arranged between the seam plane of the bearing cover and the end cover and between the seam plane of the end cover and the stator casing of the motor. Because the device adopts the above-mentioned technical scheme, the sealing effect of the motor is greatly improved, the possibility of corrosion and insulation reduction of the motor is reduced, and the effective life of the motor is improved.

Description

G roller table frequency conversion asynchronous motor anti-corrosion sealing device

technical field

The utility model relates to an anti-corrosion sealing device for an electric motor, in particular to an anti-corrosion sealing device for a G roller table frequency conversion asynchronous motor.

Background technique

In recent years, more and more general frequency conversion motors have been used. The G roller table frequency conversion motors used in metallurgical industry rolling lines are severely damaged due to the harsh actual use environment, mainly due to various problems in the corrosion, sealing and insulation performance of the motors. The existing motor sealing structure is that a waterproof ring is provided between the motor shaft end and the protective cover. There is a gap between the waterproof ring and the sealing ring provided in the motor end cover, and water will flow in from the gap. There will be aging or wear, and it is difficult to prevent water from flowing into the inner cavity of the motor; in addition, there is no effective seal between the end cover of the motor and the seam of the frame, and water vapor will seep into the inner cavity of the motor from the plane gap between the end cover and the seam of the frame. The reason has caused the corrosion of the motor and the reduction of insulation performance.

Contents of the invention

The technical problem to be solved by the utility model is to provide a G roller table frequency conversion asynchronous motor anti-corrosion sealing device with convenient sealing and good effect.

In order to solve the above-mentioned technical problems, the anti-corrosion sealing device of the G roller table frequency conversion asynchronous motor of the utility model includes a motor stator shell, an end cover arranged outside the stator rotor of the motor, a water retaining plate outside the end cover and a motor shaft, and an end cover arranged on the outside of the motor stator. The bearing on the motor shaft, the bearing cover outside the bearing and the sealing ring arranged inside the bearing cover are characterized in that: a labyrinth type water throwing plate is provided at the inner ring hole of the water retaining plate at the outer end of the motor rotating shaft, so that A first sealing ring is provided between the bearing cap and the spigot plane of the end cover, and a second sealing ring is provided between the end cover and the spigot plane of the stator housing.

The labyrinth water throwing pan is installed in tight fit with the rotating shaft of the motor, and the outer circle of its flange is in clearance fit with the inner ring hole of the water retaining pan.

The first sealing ring and the second sealing ring are rubber sealing rings.

Because the anti-corrosion sealing device of G roller table frequency conversion asynchronous motor of the utility model adopts the above-mentioned technical scheme, the sealing effect of the motor is greatly improved, the possibility of motor corrosion and insulation degradation is reduced, and the effective life of the motor is improved.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is described in further detail:

Fig. 1 is a partial structural diagram of the G roller table frequency conversion asynchronous motor anticorrosion sealing device of the utility model.

Detailed ways

Fig. 1 is a structural schematic diagram of the anti-corrosion sealing device of the G roller table frequency conversion asynchronous motor of the present invention, the device includes a motor stator housing 8, an end cover 6 arranged outside the stator and rotor of the motor, and a water retaining plate 5 outside the end cover 6 and the motor shaft 10, the bearing 9 arranged on the motor shaft 10, the bearing cap 4 outside the bearing 9 and the sealing ring 2 arranged inside the bearing cap 4, the water retaining plate 5 at the outer end of the motor shaft 10 A labyrinth water throwing pan 1 is provided at the position of the ring hole, a first sealing ring 3 is provided between the bearing cover 4 and the seam plane of the end cover 6, and the seam of the end cover 6 and the stator housing 8 A second sealing ring 7 is provided between the mouth planes.

The labyrinth water thrower 1 is installed in tight fit with the motor shaft 10, and the outer circle of its flange is in clearance fit with the inner ring hole of the water retainer 5, and is manufactured according to the tolerance of H11/a11.

The first sealing ring 3 and the second sealing ring 7 are rubber sealing rings.

When the motor is in use, when water is sprayed on the motor, the water retaining plate 5 can block most of the water, and a small part of water enters from the gap between the water retaining plate 5 and the labyrinth type water throwing plate 1. The airflow generated by the high-speed rotation of the labyrinth water thrower 1 can block the water vapor outside, preventing water vapor from entering the gap between the motor shaft 10 and the bearing cover 4; the joint between the bearing cover 4 and the end cover 6 The first seal ring 3 provided between the planes, the second seal ring 7 provided between the end cover 6 and the seam plane of the motor stator housing 8 can also effectively prevent water vapor from entering the inner cavity of the motor from the above seam plane.

Claims (3)

1, a kind of G roller-way frequency conversion asynchronous motor preserving and sealing device, comprise the motor stator housing, be located at the end cap in the motor stator rotor outside, the water retaining disk and the motor rotary shaft in the described end cap outside, be located at the bearing on the described motor rotary shaft, the bearing cap and the sealing ring of being located at the bearing cap inboard in the described bearing outside, it is characterized in that: water retaining disk inner ring hole position, described motor rotary shaft outer end is provided with the labyrinth type water-throwing disk, the seam interplanar of described bearing cap and described end cap is provided with first sealing ring, and the seam interplanar of described end cap and described stator case is provided with second sealing ring.

2, G roller-way frequency conversion asynchronous motor preserving and sealing device according to claim 1 is characterized in that: described labyrinth type water-throwing disk and described motor rotary shaft tight fit are installed, and its flange cylindrical and described water retaining disk inner ring hole are matched in clearance.

3, G roller-way frequency conversion asynchronous motor preserving and sealing device according to claim 1, it is characterized in that: described first sealing ring and second sealing ring are rubber seal rings.

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