CN211508783U

CN211508783U - Oil pollution eliminating device for high-voltage motor

Info

Publication number: CN211508783U
Application number: CN202020333652.8U
Authority: CN
Inventors: 杜灿
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-17
Filing date: 2020-03-17
Publication date: 2020-09-15
Anticipated expiration: 2030-03-17

Abstract

The utility model provides a high-voltage motor eliminates oil pollution device, air intake B has been set up in the casing, windshield B has been set up between the end cover of casing and electric motor rotor, windshield B adopts tubaeform structure, and air intake B number is two, and air intake B communicates with each other with the atmosphere, and the bearing frame of motor passes through connecting bolt and is connected as an organic wholely with the motor end cover, and windshield B separates bearing frame and the interval C of negative pressure, and set up the closing plate in windshield B one end, and the closing plate adopts the epoxy board, has set up rubber gasket at windshield B's the other end, the utility model relates to a high-voltage motor eliminates oil pollution device, compact structure avoids the inside each part of motor, like cold wind ware and cold wind room production oil stain, the motor bearing oil leak pollutes and eliminates, has improved the steady operation coefficient of motor.

Description

Oil pollution eliminating device for high-voltage motor

Technical Field

The utility model relates to an industrial high-pressure end cap formula motor field of using especially relates to a high-voltage motor eliminates oil pollution device.

Background

In the field of thermal power plant, the power plant equipment mainly includes three power equipments of steam boiler, steam turbine and generator, in the course of generating power by boiler, firstly the heat energy of boiler is converted into mechanical energy for driving turbine generator to rotate, then the generator can be converted into electric energy by means of mechanical energy, the boiler can produce steam, the steam boiler also can be called as steam generator, in the course of working boiler a water-feeding pump and a prepositive pump are equipped, the power of pump is driven by matched motor, the power of matched motor is large, its rotating speed is high, in the motor a rotating shaft is set, the rotating shaft can be maintained, and can be filled with lubricating oil, in the course of working, the copper sheet for blocking lubricating oil is easy to wear, and the bearing cavity chamber is communicated with negative pressure zone in which the fan blade of motor can be rotated at high speed, after the gap between copper sheet and rotating, the oil leakage pollution is caused, the oil leakage is sucked and smashed by the fan blades of the motor rotating at a high speed to form oil mist and reaches all parts of the motor along with circulating cooling air, the oil mist is condensed on the surfaces of the stator bar, the rotor magnetic pole, the fins of the air cooler and the like to form a large amount of oil drops, oil is leaked out of the combining surface of the outer end cover of the motor, when the oil drops are serious, dirty oil is discharged from a drain hole of a cold air cooler, the oil scale not only reduces the through flow area and the surface heat exchange efficiency, the working efficiency of the whole air cooling system is reduced, but also causes the temperature rise of a stator coil of the motor during operation, meanwhile, the oil stain corrodes the insulation of the bar and the like, the oil stain easily forms a discharge channel for electric breakdown on the surface of the.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the main technical problem who solves provides a high-voltage motor eliminates oil pollution device, can improve the life of motor, avoids the oil mist to pollute inside the motor.

The existing motor eliminates oil pollution, as shown in fig. 1, a motor rotor is arranged in a shell, the motor rotor adopts a cylindrical structure, a bearing seat is arranged at the upper end of the motor rotor, a bearing cavity is arranged between the bearing seat and the motor rotor, lubricating oil is injected into the bearing cavity, in order to avoid the lubricating oil from entering the inner cavity of the motor, the inner cavity of the motor is in a negative pressure state, namely a negative pressure interval C, a sealing tooth piece is arranged on the bearing seat, and the sealing tooth piece and the rotor of the motor keep a gap of 0.30-0.50mm so as to prevent the bearing lubricating oil from leaking into the motor from the bearing cavity.

The air inlet A is formed in the shell, as shown in the figure 1, the half position of the bearing seat is located in the area of the circulating air inlet A of the motor, the wind shield A is arranged on the air inlet, the fan blades are arranged in the shell, and the fan blades rotate at a high speed, so that negative pressure is formed in the area of the motor where the bearing seat is located, and oil mist enters the motor.

Therefore, the utility model discloses as shown in fig. 2, the improvement of structure has been made, has set up air intake B in the casing, replaces air intake A with air intake B, has set up windshield B between the end cover of casing and electric motor rotor, and windshield B replaces deep bead A, and windshield B adopts tubaeform structure for the bearing frame breaks away from the negative pressure zone, has avoided inside the oil mist gets into the motor, pollutes the motor inner coil.

The number of the air inlets B is two, the air inlets B are ventilation pipes with the diameter of 20mm, the air inlets B are communicated with the atmosphere, a bearing seat of the motor is connected with a motor end cover into a whole through connecting bolts, the bearing seat is separated from a negative pressure interval C by a wind shield B, a sealing plate is arranged at one end of the wind shield B, the sealing plate is made of epoxy resin plates, and the gap between the sealing plate and the rotor is 0.20-0.40 mm, so that the sealing effect is ensured.

Meanwhile, the rubber gasket is arranged at the other end of the wind shield B, so that the sealing effect of the wind shield and the end cover is ensured.

In order to prevent the bearing seat lubricating oil from entering the motor through the lower end face of the wind shield B, a sealing colloid is arranged between the motor end cover and the wind shield B.

According to the optimal technical scheme, the observation hole with the diameter of 10 mm is formed between the motor shell and the windshield B, so that observation is facilitated, and the inner cavity of the motor is thoroughly prevented from being polluted by oil.

The utility model has the advantages that: the utility model relates to a high-voltage motor eliminates oil pollution device, compact structure avoids inside each part of motor, produces the oil stain like air cooler and cold wind room, and the motor bearing oil leak pollutes and eliminates, has improved the steady operation coefficient of motor.

Drawings

FIG. 1 is a schematic cross-sectional view of a prior art motor for blocking oil contamination of a bearing;

FIG. 2 is a schematic cross-sectional view of the oil contamination removing device for a high-voltage motor according to the present invention;

the parts in the drawings are numbered as follows:

the motor comprises a motor rotor 1, fan blades 2, a bearing seat 3, a wind shield A4, a wind shield B5, a negative pressure interval C6, a sealing tooth piece 7, a sealing plate 8, an end cover 9, a bearing cavity 10, an air inlet A11, an air inlet B12 and a rubber gasket 13.

Detailed Description

The following detailed description of the preferred embodiments of the present invention will be provided in conjunction with the accompanying drawings, so as to enable those skilled in the art to more easily understand the advantages and features of the present invention, and thereby define the scope of the invention more clearly and clearly.

Referring to fig. 1 and 2, an embodiment of the present invention includes:

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A high-pressure motor oil pollution eliminating device is characterized in that a motor rotor is arranged in a shell, the motor rotor is of a cylindrical structure, a bearing seat is arranged at the upper end of the motor rotor, a bearing cavity is arranged between the bearing seat and the motor rotor, the cavity in the motor is in a negative pressure state and is a negative pressure interval C, an air inlet B is arranged in the shell and replaces an air inlet A, a windshield B is arranged between an end cover of the shell and the motor rotor and replaces a wind shield A, the windshield B is of a horn-shaped structure and enables the bearing seat to be separated from the negative pressure area, the number of the air inlets B is two, ventilation pipes with the diameter of 20 millimeters are adopted, the air inlet B is communicated with the atmosphere, the bearing seat of the motor is connected with the end cover of the motor into a whole through a connecting bolt, the windshield B separates the bearing seat from the negative pressure interval C, and a, the sealing plate is made of epoxy resin, the other end of the wind shield B is provided with a rubber gasket, and in order to prevent bearing seat lubricating oil from entering the motor through the lower end face of the wind shield B, sealing colloid is arranged between the motor end cover and the wind shield B.

2. The oil contamination removing apparatus for a high-voltage motor as recited in claim 1, wherein a gap between the sealing plate and the rotor is 0.20mm to 0.40 mm.

3. The oil contamination removing apparatus for a high-voltage electric motor according to claim 1, wherein a viewing hole having a diameter of 10 mm is provided between the motor housing and the windshield B.