CN214154274U - Air-cooled electric main shaft structure - Google Patents
Air-cooled electric main shaft structure Download PDFInfo
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- CN214154274U CN214154274U CN202120240239.1U CN202120240239U CN214154274U CN 214154274 U CN214154274 U CN 214154274U CN 202120240239 U CN202120240239 U CN 202120240239U CN 214154274 U CN214154274 U CN 214154274U
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Abstract
Air-cooled electric main shaft structure belongs to electric main shaft cooling technical field, and motor casing front exit sets up the front bearing through the front bearing frame, still sets up the front nut of fixing in the pivot. The rear outlet of the motor shell is provided with a rear cover. The rotator includes a rotating shaft and a front nut. The rear cover is provided with a rear cover air inlet channel. The rear cover air inlet channel is communicated with a shell air inlet channel positioned in the motor shell, the shell air inlet channel is communicated with the front bearing seat air inlet channel and then communicated with the inlet of the front bearing seat annular groove, and the outlet of the front bearing seat annular groove is connected with the shell channel which is distributed around the motor shell through the front bearing seat exhaust channel. The last air outlet of the shell channel is connected with the front bearing seat channel to a gap between the rotating body and the front bearing seat. The housing channel may be a U-shaped channel that is repeatedly and continuously bent within the motor housing. This design is at first the cooling front bearing, recooling motor, discharges in the gap department of front end pivot and front bearing seat at last for the malleation is sealed, and cooling efficiency is high, and is effectual.
Description
Technical Field
The utility model belongs to the technical field of the cooling of electricity main shaft, in particular to forced air cooling electricity main shaft structure.
Background
Because the electric spindle is of a built-in motor structure, if heat generated by the operation of the motor is not taken away in time, the electric spindle is thermally deformed, the motor is burnt seriously, and the service life of the electric spindle is influenced.
At present, the electric spindle generally adopts two modes of circulating water (oil) cooling (collectively referred to as liquid cooling) and air cooling, the liquid cooling effect is better than the air cooling effect, but a refrigerator or a cooling box needs to be configured, the investment cost is high in the early stage, liquid cooling conditions are not provided in some occasions, although the air cooling effect is not as good as the liquid cooling effect, the configuration is simple, the investment is saved, the use and the management are convenient, and the electric spindle is widely used in many occasions, such as occasions with low requirements on a carving machine electric spindle, a woodworking electric spindle, a grinding electric spindle and the like.
Most of air-cooled electric main shafts on the market at present adopt an impeller to add the pivot structure and produce air current cooling electric main shaft casing, add an impeller exactly at the tail end of electric main shaft pivot, the rotatory air current that produces of impeller is driven to electric main shaft high-speed rotatory time, and this air current passes through the louvre and the surface of electric main shaft aluminium system casing, takes away the heat that the motor produced, and this kind of scheme weak point lies in: firstly, the impeller rotating at high speed has high noise; secondly, the running cost of cooling the electric spindle by the air flow generated by the rotation of the impeller is high; thirdly, the cooling efficiency is low and the cooling effect is not good; and fourthly, the rotating shaft extends to the outside of the electric spindle to be connected with the impeller, gaps exist, and high-speed air flow easily blows impurities such as dust in the environment into the electric spindle.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned technique not enough, provide air-cooled electric main shaft structure, do not utilize the impeller to produce high velocity air flow but directly utilize compressed air (air pump) in workshop to make the air supply of cooling usefulness, compressed air at first cools off the front bearing, then recooling electric main shaft motor flows at last and electric main shaft plays the malleation sealing effect foremost.
The technical scheme is as follows:
an air-cooled electric spindle structure comprises a rear cover, a motor shell, a front bearing seat and a rotor. The method is characterized in that:
the motor casing front outlet is provided with a front bearing through a front bearing seat, the front bearing seat is fixed at the motor casing front outlet, and a front nut fixed on the rotating shaft is also arranged.
The rear outlet of the motor shell is provided with a rear cover.
The rotator includes a rotating shaft and a front nut.
The front part of the rotating shaft in the rotating body is supported by a front bearing.
The rear cover is provided with a rear cover air inlet channel.
The rear cover air inlet channel is communicated with a shell air inlet channel positioned in the motor shell, the shell air inlet channel is communicated with the front bearing seat air inlet channel and then communicated with the inlet of the front bearing seat annular groove, and the outlet of the front bearing seat annular groove is connected with the shell channel which is distributed around the motor shell through the front bearing seat exhaust channel.
The last air outlet of the shell channel is connected with the front bearing seat channel to a gap between the rotating body and the front bearing seat.
The motor housing may be an aluminum alloy housing.
The housing channel may be a U-shaped channel that is repeatedly and continuously bent within the motor housing.
The electric spindle has two heating sources, namely, the motor generates heat when running, and the bearing generates friction heat when running. The heat generated by the motor operation accounts for about 70% of the total heat, the bearing friction heat accounts for about 30% of the total heat, but the temperature resistance of the motor can reach 140 ℃, and the service life of the bearing is greatly reduced when the temperature of the bearing exceeds 80 ℃, so that the temperature reduction of the bearing is the primary task for stable use of the electric spindle. The utility model discloses a compressed air cooling designs cooling channel, at first cools off the fore-stock, then recooling motor, discharges in the gap department of electricity main shaft front end pivot and front axle bearing at last for the malleation sealing effect.
The advantages are that:
(1) and cooling the front bearing, and directly communicating compressed air to a front bearing seat annular groove which is arranged around the front bearing to uniformly and fully cool the front bearing.
(2) The cooling structure comprises a motor, a front bearing, a stator mounting shell, a cooling channel, a front end cover, a rear end cover, a cooling channel, a cooling plate, a cooling channel, a shell cover, a cooling fan, a front end cover, a cooling channel, a cooling fan and a cooling fan.
(3) The positive pressure is sealed, the electric main shaft rotor is connected with the cutter, a gap exists between the rotating main shaft (rotor) and the bearing seat, external impurities are easily caused to enter the electric main shaft to pollute the electric main shaft, and compressed air after cooling the motor finally flows to the gap and is discharged outwards, so that the positive pressure sealing effect is realized.
(4) The air pump is used for cooling the electric spindle, so that the running cost is low, the cooling efficiency is high, and the cooling effect is good.
Drawings
Fig. 1 is a cross-sectional view in one direction of the present invention (the flow path through which the back cover inlet channel enters the front bearing seat annular groove through the motor housing and returns to the housing channel can be seen).
Fig. 2 is a structural sectional view in another direction of the present invention (see the outward discharge flow path from the gap between the front end of the front bearing seat and the rotating shaft after the motor casing is cooled).
Fig. 3 is a schematic perspective view of the present invention.
The motor comprises a rear cover air inlet channel 1, a rear nut 2, a rear bearing 3, a rear bearing seat 4, a motor stator 5, a motor shell 6, a shell air inlet channel 7, a rotating shaft (with a motor rotor) 8, a front bearing seat 9, a front bearing seat air inlet channel 10, a front bearing seat annular groove 11, a front bearing 12, a front nut 13, a gap 14, a front bearing seat exhaust channel 15, a front bearing seat transition groove 16, a rear cover transition groove 17, a rear cover 18, a shell channel 19, a front bearing seat channel 20 and a rotating body 21.
Detailed Description
The air-cooled electric spindle structure comprises a rear cover 18, a motor housing 6 (a metal housing, specifically an aluminum alloy housing for good heat dissipation effect), a front bearing seat 9 and a rotor 21.
The front outlet of the motor shell 6 is provided with a front bearing 12 through a front bearing seat 9, the front bearing seat 9 is fixed at the front outlet of the motor shell 6, and a front nut 13 for threaded connection on the rotating shaft 8 is also arranged.
The rear bearing seat 4 and the rear bearing 3 are arranged on the inner side of the rear outlet of the motor shell 6, and the rear nut 2 is connected to the rotating shaft 8 in a threaded mode.
The rear outlet of the motor housing 6 is provided with a rear cover 18.
The rotor comprises a shaft 8 and a front nut 13.
The rotary shaft 8 in the rotor is supported by a front bearing 12 and a rear bearing 3.
The rear cover 18 is provided with a rear cover air inlet channel 1 which is connected with an external air source.
The rear cover air inlet channel 1 is communicated with a shell air inlet channel 7 which is positioned in the motor shell 6 and arranged along the axial direction, the shell air inlet channel 7 is communicated with a front bearing seat air inlet channel 10 and then communicated with the inlet of a front bearing seat annular groove 11,
the outlet of the front bearing block annular groove 11 is connected via a front bearing block air outlet duct 15 to a housing duct 19 extending around the motor housing 6.
The housing passage 19 is a general name of a U-shaped passage repeatedly and continuously bent in the cylindrical motor housing 6.
The U-shaped channel of the housing channel 19 includes a plurality of straight channels and front bearing seat transition grooves 16 or rear cover transition grooves 17 corresponding to both ends, respectively.
The last outlet port of the forward shell channel 19 is connected with the front bearing seat channel 20, and the gap 4 between the front nut 13 on the rotating shaft 8 and the front bearing seat 9 is discharged outwards.
The gap 4 is also the gap between the rotor 21 and the front bearing support 9.
The cooling principle and the process are as follows:
the gas enters from the rear cover gas inlet channel 1, passes through the motor shell gas inlet channel 7, the front bearing seat gas inlet channel 10, the front bearing seat annular groove 11, the front bearing seat gas outlet channel 15 and the shell channel 19, completely cools the periphery of the motor shell 6, enters the front bearing seat channel 20 from the last outlet, flows to the gap 4 between the front nut 13 on the rotating shaft 8 and the front bearing seat 9, and is reserved outwards to play a positive pressure sealing role.
The motor stator 5 is disposed within the motor housing 6.
To increase the heat dissipation area, fins or heat dissipation protrusions and grooves are formed in the passage of the motor housing 6.
Claims (3)
1. The air-cooled electric spindle structure is provided with a rear cover (18), a motor shell (6), a front bearing seat (9) and a rotating body (21); the method is characterized in that:
a front bearing (12) is arranged at the front outlet of the motor shell (6) through a front bearing seat (9), the front bearing seat (9) is fixed at the front outlet of the motor shell (6), and a front nut (13) fixed on the rotating shaft (8) is also arranged;
a rear cover (18) is arranged at the rear outlet of the motor shell (6);
the rotating body comprises a rotating shaft (8) and a front nut (13);
the front part of a rotating shaft (8) in the rotating body is supported by a front bearing (12);
the rear cover (18) is provided with a rear cover air inlet channel (1);
the rear cover air inlet channel (1) is communicated with a shell air inlet channel (7) positioned in the motor shell (6), the shell air inlet channel (7) is communicated with a front bearing seat air inlet channel (10) and then communicated with an inlet of a front bearing seat annular groove (11), and an outlet of the front bearing seat annular groove (11) is connected with a shell channel (19) which is distributed around the motor shell (6) through a front bearing seat exhaust channel (15);
the last air outlet of the shell channel (19) is connected with the front bearing seat channel (20) to the gap between the rotating body (21) and the front bearing seat (9).
2. The air-cooled motorized spindle unit according to claim 1, wherein:
the motor shell (6) is an aluminum alloy shell.
3. The air-cooled motorized spindle unit according to claim 1, wherein:
the shell channel (19) is a U-shaped channel repeatedly and continuously bent in the motor shell (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120240239.1U CN214154274U (en) | 2021-01-28 | 2021-01-28 | Air-cooled electric main shaft structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120240239.1U CN214154274U (en) | 2021-01-28 | 2021-01-28 | Air-cooled electric main shaft structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214154274U true CN214154274U (en) | 2021-09-07 |
Family
ID=77549554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120240239.1U Active CN214154274U (en) | 2021-01-28 | 2021-01-28 | Air-cooled electric main shaft structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214154274U (en) |
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2021
- 2021-01-28 CN CN202120240239.1U patent/CN214154274U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: Structure of air-cooled electric spindle Effective date of registration: 20230612 Granted publication date: 20210907 Pledgee: China Construction Bank Corporation Dalian Jinpu New Area Branch Pledgor: KAIGE SPINDLE TECHNOLOGY (DALIAN) CO.,LTD. Registration number: Y2023980043553 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |