CN2807581Y

CN2807581Y - Gas-curtain cooling structure of built-in motor principal axis

Info

Publication number: CN2807581Y
Application number: CN 200520108910
Authority: CN
Inventors: 陈志平; 张正忠
Original assignee: YEONG CHIN MACHINERY INDUSTRIES Co Ltd
Current assignee: YEONG CHIN MACHINERY INDUSTRIES Co Ltd
Priority date: 2005-06-07
Filing date: 2005-06-07
Publication date: 2006-08-16
Anticipated expiration: 2015-06-07

Abstract

The utility model discloses a gas-curtain cooling structure of a built-in motor principal axis, which is characterized in that the end surface of the bottom of a bearing seat is additionally provided with a heat radiation piece, and a cool air source is led in between the heat radiation piece and the bearing seat, so a C type ring-shaped cool air gas curtain is formed to make the heat radiation of the bearing seat accelerated when the motor principal axis runs to avoid the situation that the principal axis is damaged due to an overhigh temperature.

Description

The air curtain curtain cooling structure of built-in motor spindle

Technical field

The utility model relates to a kind of cooling structure, is meant a kind of air curtain curtain cooling structure of built-in motor spindle of the quick heat extraction that provides at bearing pedestal by it.

Background technology

The built-in motor of high-speed main spindle adopts the direct driving main shaft of motor, and it is different from traditional gear, belt transmissioning mode, and has high speed, high mechanical efficiency, high rigidity, and advantage such as easy maintenance.Yet the thermal deformation of tool machine spindle is one of main error source that influences machining accuracy, the thermal deformation that heat causes main shaft to produce because of variations in temperature, will directly be reflected on the precision of workpiece, and can have influence on the horsepower and torsion output of motor, so the relevant heating up problem that how to overcome built-in motor, an epochmaking problem really.

Above-mentioned main shaft is when running up, rotor can produce high heat, heat up is passed to bearing pedestal, makes bearing pedestal rise fast because of being subjected to the Gao Re temperature, add bearing pedestal itself because of bearing after running up, also can produce thermal source, more quicken the bearing pedestal temperature and rise, cause at last that bearing is bad because of heat extraction, the too high shadow of temperature rise is to the precision of one-piece rotor shaft, the life-span of reducing bearing simultaneously, what is more, will make bearing burn greatly because of temperature rise.

The utility model content

The technical problems to be solved in the utility model is: provide a kind of air curtain curtain cooling structure of built-in motor spindle, to overcome the defective of above-mentioned known technology.

Technical solution of the present utility model is: a kind of air curtain curtain cooling structure of built-in motor spindle, it is specialized in and is used in built-in motor, it is to install a fin at the bearing pedestal of the set main shaft of described built-in motor to constitute, the internal sleeve of this bearing pedestal is provided with a bearing, the top then is provided with a bearing cap, wherein: the bottom end face of described bearing pedestal is offered a C shape annular groove with short slot, and the outer wall of described bearing pedestal offers one and enters the hole, this enters the hole and is communicated to default the portalling and be a duct that is connected of described annular groove, enters to provide the high pressure cold air source to follow this; Described fin is a ring plate, and it is provided with a breach, and described fin depends on the annular groove that is incorporated into described bearing pedestal, and described breach is corresponding setting with described short slot; Coupling combination by above-mentioned bearing pedestal and fin, the bearing pedestal that makes built-in motor spindle is in conjunction with a fin, by constituting a conduit between the annular groove of bearing pedestal and the fin, and utilize entering the hole and portalling of being communicated with that the high pressure cold air source is introduced, make cold air source follow this and enter bearing pedestal, provide to form a C type ring-type air curtain curtain and quicken the heat extraction effect.

The air curtain curtain cooling structure of built-in motor spindle as mentioned above, this fin is an O shape ring plate.

The air curtain curtain cooling structure of built-in motor spindle as mentioned above, this fin is a C shape ring plate.

The air curtain curtain cooling structure of built-in motor spindle as mentioned above, the central bulge loop of this fin and bearing pedestal remains with a czermak space.

The air curtain curtain cooling structure of built-in motor spindle as mentioned above, this high pressure cold air source is the device combination via air cleaner, pressure regulating valve, pressure switch, compressor and condenser, and utilize two sides to be in charge of to constitute first cold air source and second cold air source respectively, make the high pressure cold air source enter the bearing pedestal of motor spindle both sides simultaneously, the air cooling loop to be provided and to form C type ring-type air curtain curtain.

Characteristics of the present utility model and advantage are: the air curtain curtain cooling structure of built-in motor spindle of the present utility model, its bottom end face at bearing pedestal installs a fin additional, and between fin and bearing pedestal, import a cold air source, form a cold air air curtain curtain that is C type ring-type thus, make the motor spindle running time can quicken the heat extraction of bearing pedestal, too high and cause the impaired situation of main shaft to avoid Yin Wendu.

Description of drawings

Fig. 1 is the exploded perspective view of the utility model bearing pedestal and fin.

Fig. 2 is the combination stereogram of the utility model bearing pedestal and fin.

Fig. 3 is assembled in the generalized section of built-in motor for the utility model.

Fig. 4 is the schematic diagram that flows to of the utility model heat radiation cooling path.

Fig. 5 is the enforcement illustration that the utility model and cold air source configuration are formed.

Fig. 6 is path, a heat of cooling of the present utility model flow field schematic diagram.

Embodiment

Following conjunction with figs. describes feature of the present utility model and advantage in detail:

As shown in Figure 1 to Figure 3, the air curtain curtain cooling structure of the built-in motor spindle that the utility model proposes, it is specialized in and is used in built-in motor 10, mainly is to install a fin 3 at the bearing pedestal 2 of built-in motor 10 set main shafts 1 to constitute, wherein:

Built-in motor 10, as shown in Figure 3, its formation is suitable with known technology, except that comprising above-mentioned main shaft 1 and bearing pedestal 2, and have basic building blocks such as rotor 4, stator 5, collar bush 6, because of the composition form of rotor 4, stator 5, collar bush 6 is identical with known technology, so do not give unnecessary details in addition.

Bearing pedestal 2, its internal sleeve is provided with a bearing 21, the top then is provided with a bearing cap 22, but it particularly offers a C shape annular groove 23 (as Fig. 1) with short slot 231 at the bottom end face of this bearing pedestal 2, and bearing pedestal 2 is also offered one in outer wall and is advanced hole 24a, make this advance hole 24a and can be communicated to the 24b that portals that annular groove 23 is preset, order is advanced hole 24a and is a duct that is connected with the 24b that portals, and enters so that the high pressure cold air source can be followed this duct;

Fin 3, be an O shape (or C shape) ring plate, its chosen place is provided with a breach 31, on the C shape annular groove 23 that makes fin 3 depend on being incorporated into bearing pedestal 2, and breach 31 is corresponding with short slot 231, and the central bulge loop 25 of fin 3 and bearing pedestal 2 keeps a suitable czermak space A (as Fig. 2, Fig. 3);

By of the coupling combination of above-mentioned bearing pedestal 2 with fin 3, can install a fin 3 in the bearing pedestal 2 of built-in motor 10 set main shafts 1 additional, make and constitute a conduit between the annular groove 23 of bearing pedestal 2 and the fin 3, and utilize the hole 24a that advances that is communicated with the high pressure cold air source to be introduced with the 24b that portals, make cold air source can follow paths such as this conduit and described czermak space A and enter bearing pedestal 2, the effect (as shown in Figure 4) of quickening its heat extraction is provided to form a C type ring-type air curtain curtain, has the heat extraction of acceleration effect because of bearing pedestal 2 when making motor spindle 1 running, so can avoid the too high main shaft 1 that causes of temperature impaired, and then guarantee the precision of one-piece rotor shaft 1, and can promote the useful life of bearing 21.

Shown in Fig. 5 embodiment, be meant that the utility model is provided with an air cooling loop structure in main shaft 1 below of built-in motor 10, the high pressure cold air source is directly blown at pyrotoxins such as the rotor 4 of built-in motor 10 and stators 5 simultaneously, and the described high pressure cold air source that comes from the outside, mainly be via air cleaner 20, pressure regulating valve 30, pressure switch 40, the combination of devices such as compressor 50 and condenser 60, and utilize two sides to be in charge of 71,72 (promptly constituting first cold air source and second cold air source respectively) make the high pressure cold air source enter the bearing pedestal 2 of both sides simultaneously, 2a, so that pyrotoxins such as rotor 4 and stator 5 are directly blown, and cooperate the utility model C type ring-type air curtain curtain structure of doing to reach the auxiliary purpose of quickening heat extraction simultaneously.

As shown in Figure 6, heat of cooling flow field schematic diagram for the utility model C type ring-type air curtain curtain, according to design principle of the present utility model, it is to utilize the characteristic of solid conduction and gaseous exchange to be designed, main shaft is when running up, its heat discharge path is Q1, Q2, Q3, Q4, Q5, Q6, Q7, and it represents meaning as follows:

Q1: when main shaft ran up, the high heat that rotor produces was carried out forced convertion and is taken away heat with first cold air source;

Q2: because forced convertion takes away heat Q1, therefore first cold air source becomes hot gas through air flow channel to the rotor top, and carry out forced convertion with fin this moment, and with thermal source to flowing to fin;

Q3: hot gas mixes with the second cold air source row forced convertion;

Q4:, carry out the solid thermal conduction to flowing to the thermal source of fin;

Q5: the high temperature of fin after by Q2 (convection current) and Q4 (conduction), carry out forced convertion with second cold air source again, and heat taken away;

Q6: when bearing pedestal runs up via bearing, produce the high temperature and second cold air source and conduct convection current, and heat is discharged;

Q7: second cold air source and fin, first cold air source and bearing pedestal carry out forced convertion (Q3, Q5, Q6) mix after, again hot gas is discharged atmosphere at last.

Though the utility model discloses with specific embodiment; but it is not in order to limit the utility model; any those skilled in the art; the displacement of the equivalent assemblies of under the prerequisite that does not break away from design of the present utility model and scope, having done; or, all should still belong to the category that this patent is contained according to equivalent variations and modification that the utility model scope of patent protection is done.

Claims

1, a kind of air curtain curtain cooling structure of built-in motor spindle, it is specialized in and is used in built-in motor, and it is to install a fin at the bearing pedestal of the set main shaft of described built-in motor to constitute, and the internal sleeve of this bearing pedestal is provided with a bearing, the top then is provided with a bearing cap, it is characterized in that:

The bottom end face of described bearing pedestal is offered a C shape annular groove with short slot, and the outer wall of described bearing pedestal offers one and enter the hole, and this enters the hole and is communicated to default the portalling and be a duct that is connected of described annular groove;

Described fin is a ring plate, and it is provided with a breach, and described fin depends on the annular groove that is incorporated into described bearing pedestal, and described breach is corresponding setting with described short slot;

The coupling combination of above-mentioned bearing pedestal and fin, the bearing pedestal of described built-in motor spindle is in conjunction with above-mentioned fin, constitute a conduit between the annular groove of described bearing pedestal and the fin, the high pressure cold air source is introduced and is entered described bearing pedestal with portalling by the hole of advancing that is communicated with, to form a C type ring-type air curtain curtain.

2, the air curtain curtain cooling structure of built-in motor spindle according to claim 1, it is characterized in that: this fin is an O shape ring plate.

3, the air curtain curtain cooling structure of built-in motor spindle according to claim 1, it is characterized in that: this fin is a C shape ring plate.

4, the air curtain curtain cooling structure of built-in motor spindle according to claim 1, it is characterized in that: the central bulge loop of this fin and bearing pedestal remains with a czermak space.

5, the air curtain curtain cooling structure of built-in motor spindle according to claim 1, it is characterized in that: this high pressure cold air source is the device combination via air cleaner, pressure regulating valve, pressure switch, compressor and condenser, and utilize two sides to be in charge of to constitute first cold air source and second cold air source respectively, described high pressure cold air source enters the bearing pedestal of motor spindle both sides, constitutes the air cooling loop and forms described C type ring-type air curtain curtain.