CN205478912U - Air supporting electricity main shaft - Google Patents

Abstract

The utility model discloses an air supporting electricity main shaft, including shell (1), set up shell (1) inside stator (5), axis body (2), fix on axis body (2) and with stator (5) complex rotor (4), be equipped with on shell (1) inlet channel (11) with can be with the air outlet channel who enters into shell (1) inside gas outgoing, wrap up axis body (2) outside has graphite axle sleeve (3), inlet channel (11) are relative with graphite axle sleeve (3) position. The utility model provides an air supporting electricity main shaft is through setting up inlet channel on the shell to parcel anchor stone china ink axle sleeve on the axis body makes gas enter into shell inside back through inlet channel, can boost the suspension with the graphite axle sleeve, makes the axis body not rub with the emergence of peripheral equipment when rotating, thereby has improved the slew velocity of axis body effectively, reduces the consume of energy greatly, has improved the machining efficiency of digit control machine tool.

Description

An air-floating electric spindle

technical field

The utility model relates to the field of numerical control machine tools, in particular to an air-floating electric spindle.

Background technique

At present, ultra-precision machining has become the trend of modern production development, and it is also an important part of my country's high-tech field. The high index of precision machining has formed high requirements for precision machining equipment and promoted its progress. In turn, the progress of precision machinery is a necessary condition for the realization of precision machining. In the prior art, due to the frictional contact between the shaft body and the shaft sleeve, the friction coefficient is large and the rotation speed is slow. In addition, friction will generate relatively large noise, and will also cause excessive vibration of the shaft body, which will affect the actual processing effect and reduce the processing accuracy.

Utility model content

The purpose of the utility model is to provide an air-floating electric spindle to improve the above disadvantages.

The utility model adopts the following technical solutions to solve the technical problems: the utility model provides an air-floating electric spindle, including a casing, a stator arranged inside the casing, a shaft body, and a rotor fixed on the shaft body and cooperating with the stator , the housing is provided with an air intake channel and an air outlet channel capable of discharging the gas entering the housing, the shaft body is wrapped with a graphite sleeve, and the air intake channel is opposite to the graphite sleeve .

Optionally, there are multiple air intake passages, which are equally spaced and evenly distributed on the housing along the axial direction of the housing.

Optionally, a muffler is provided outside the air outlet channel.

Optionally, the stator is located at one end in the axial direction inside the casing.

Optionally, a balance ring surrounding the end of the shaft body and capable of limiting vibration of the shaft body is provided inside the housing.

Optionally, a pneumatic groove capable of assisting gas to push the graphite sleeve is formed on the outside of the graphite sleeve.

Optionally, a filter is provided at the channel opening of the air intake channel.

Optionally, a water cooling channel communicating with the outside of the housing is formed inside the housing.

Optionally, the water-cooling channel is located in the casing outside the stator.

Optionally, the stator is wrapped with a motor cooling jacket.

The utility model has the following beneficial effects:

The air-floating electric spindle provided by the utility model can push the graphite shaft sleeve up and suspend after the gas enters the inside of the housing through the air intake channel by setting the air intake passage on the housing and wrapping and fixing the graphite sleeve on the shaft body. , so that the shaft does not rub against peripheral equipment during rotation, thereby effectively increasing the rotation speed of the shaft, greatly reducing energy consumption, and improving the processing efficiency of the CNC machine tool. In addition, the machining accuracy of the CNC machine tool is further improved by setting the balance ring to limit the vibration of the shaft body.

Description of drawings

Figure 1 is a schematic diagram of the internal structure of the air-floating electric spindle provided by the embodiment of the utility model;

Fig. 2 is a schematic structural diagram of the water-cooling channel of the air-floating electric spindle provided by the embodiment of the utility model.

The marks in the figure are: 1-housing; 11-intake channel; 12-water cooling channel; 2-shaft body; 3-graphite sleeve; 31-pneumatic slot; 4-rotor; 5-stator; 6-balance ring; 7- Motor cooling jacket.

detailed description

Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is further elaborated.

In the prior art, the machining spindle used in the CNC machine tool is usually connected to the housing through a bearing, and the working principle of the bearing is to reduce the frictional force through balls. Although the physical contact can reduce the friction force, the friction force is still relatively large, which will still have a certain impact on the rotation speed of the shaft body.

The utility model proposes an air-floating electric spindle, which includes a casing 1, a stator 5 arranged inside the casing 1, a shaft body 2, and a rotor 4 fixed on the shaft body 2 and cooperating with the stator 5. The housing 1 is provided with an air inlet passage 11 and an air outlet passage capable of discharging the gas entering the housing 1. The shaft body 2 is wrapped with a graphite sleeve 3, and the air inlet passage 11 is connected with the graphite shaft. Set 3 positions are relative.

The air intake channel 11 is set on the casing 1, and it is directly aligned with the graphite bushing 3 wrapped outside the shaft body 2. Since the radial direction of the graphite bushing 3 is larger than that of the shaft body 2 and is light in texture, when the gas enters the interior of the casing 1, it directly The outer wall of the graphite shaft sleeve 3. The graphite bushing 3 will be pushed up by the incoming gas, driving the shaft body 2 inside the graphite bushing 3 to suspend together. The suspension of the shaft body 2 can avoid friction with other surrounding parts. When the shaft body 2 rotates, there is almost no friction between the suspended shaft body 2 and the graphite bushing 3 and the surrounding parts, so that the shaft body 2 The rotating speed is greatly improved, which effectively improves the working efficiency of CNC machine tools.

Further, there are multiple air intake passages 11 , which are evenly distributed on the casing 1 at equal intervals along the axial direction of the casing 1 .

Setting multiple air intake passages 11 can push the graphite shaft sleeve 3 with gas from different positions, so that the suspension effect of the meeting of the graphite shaft sleeve 3 and the shaft body 2 is better. In addition, because the air intake channels 11 are evenly distributed on the casing 1, the graphite bushing 3 can better maintain balance when it is stressed, so that the shaft body 2 is more stable during operation, the vibration amplitude is reduced, and the performance can be further improved. The speed of shaft 2.

As shown in an embodiment of the present utility model, a muffler is provided outside the air outlet channel.

Installing a muffler on the outside of the air outlet channel can reduce the noise of the gas filled into the shell 1 when it is discharged. When the gas is discharged, the flow rate is large, and there will inevitably be a lot of noise at the outlet. Installing a muffler can effectively prevent the gas from being discharged. The flow rate of the gas can be changed from time to time, thereby reducing the noise generated by the flow, and making the CNC machine tool quieter under working conditions.

As shown in an embodiment of the present utility model, the stator 5 is located at one end of the inner axial direction of the housing 1 .

The air-floating electric spindle places the power part at the rear end of the shaft body 2, which can effectively save space. In addition, the casing 1 can also be set as a split structure, the casing 1 of the rear power part and the casing 1 of the front spindle part are divided into two parts, and the two parts are connected by screws, which is not only convenient for assembly personnel to install, but also convenient for maintenance , reflecting the humanized design concept and needs. From the outside, the main shaft has a simpler and more beautiful structure. The housing 1 of the rear power part and the housing 1 of the front main shaft part can be connected by four quick plugs, and the structure is very distinct. On the premise of realizing the functions and technical indicators, the aesthetics of the products have been achieved.

As shown in an embodiment of the present utility model, a balance ring 6 surrounding the end of the shaft body 2 and capable of limiting the vibration of the shaft body 2 is provided inside the housing 1 .

The purpose of setting the balance ring 6 is to stabilize the shaft body 2 , that is to realize the dynamic balance of the shaft body 2 . Since the diameter of the shaft end of the power part at the end of the shaft body 2 is small, a balance ring 6 is installed inside the housing 1 so that the shaft body 2 can realize dynamic balance during rotation. When any rotor 4 rotates around its axis, a centrifugal force is generated due to the uneven mass distribution of the rotor 4 relative to the axis. This unbalanced centrifugal force acts on the shaft body 2 to cause vibration, noise, and acceleration of the shaft body 2. The wear of the shaft end seriously affects the performance and life of the product. The performance of the shaft body 2 can be improved to a great extent after the dynamic balancing process is performed by the Aizhuang balancing ring 6 .

As shown in an embodiment of the present utility model, the exterior of the graphite bushing 3 is formed with an aerodynamic groove 31 capable of assisting gas to push the graphite bushing 3 .

A pneumatic groove 31 is set on the graphite bushing 3, which can increase the driving force of the gas on the graphite bushing 3 when it contacts the graphite bushing 3, and the pneumatic groove 31 can realize the function of converging gas, so that the graphite bushing 3 can Levitation can be achieved under the push of a small flow rate of gas, which reduces the power of the gas pump output and effectively reduces energy consumption.

Further, a filter screen is provided at the channel opening of the air intake channel 11, through which some impurities in the gas can be filtered out, thereby prolonging the cleaning time of the space between the interior of the shell 1 and the graphite sleeve 3, effectively reducing the The number of replacements improves work efficiency.

As shown in an embodiment of the present utility model, the inside of the casing 1 is formed with a water cooling passage 12 communicating with the outside of the casing 1 .

Setting the water-cooling channel 12 can make the air-floating electric spindle adopt the way of circulating water cooling to realize the cooling of the internal equipment. The aqueous solution enters from the external water cooler through the inlet of the water cooling passage 12 on the casing 1, and passes through the water cooling passage 12 in the casing 1 close to the corresponding part where the heating device inside the casing 1 is located to realize cooling of the built-in motor. Then the aqueous solution flows back to the water chiller through the outlet of the water cooling channel 12 to realize the effect of circulating refrigeration. Certainly, the water-cooling channel 12 can be arranged only near the position near the stator 5 to cool down only the motor part.

Specifically, the water cooling channel 12 is located in the casing 1 outside the stator. Setting the water-cooling channel 12 in this way can make the stator arranged inside the housing 1 realize cooling in all directions in the circumferential direction, speed up the cooling speed, avoid dead angles, and prevent the motor from being burned due to local overheating.

As shown in an embodiment of the present invention, the stator 5 is wrapped with a motor cooling jacket 7 . The motor cooling jacket 7 is a cooling device that independently realizes the cooling of the stator 5, and the motor cooling jacket 7 can also adopt a motor cooling jacket 7 with a water cooling function, so that the stator 5 has an independent cooling device to avoid excessive temperature of the stator 5 during work. High and burnt.

The air-floating electric spindle of the utility model can not only effectively improve the machining accuracy of products, but also reduce pollution and noise. With the technical advantages of small size, high speed and high stability, it can be widely used in various fields of the machinery industry. The spindle can be used on high-precision CNC machine tools, which can not only improve the quality of products, but also prolong the life of the tool and ensure the stable and high-efficiency work of the machine tool.

The sequence of the above embodiments is only for convenience of description, and does not represent the advantages or disadvantages of the embodiments.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (10)

1. An air-floating electric spindle, comprising a casing (1), a stator (5) arranged inside the casing (1), a shaft body (2), fixed on the shaft body (2) and connected to the stator ( 5) A matched rotor (4), characterized in that the housing (1) is provided with an air inlet channel (11) and an air outlet channel capable of discharging the gas entering the housing (1), and the shaft The body (2) is wrapped with a graphite bushing (3), and the air inlet channel (11) is opposite to the graphite bushing (3). 2. The air-floating electric spindle according to claim 1, characterized in that there are a plurality of said air intake passages (11), and they are evenly distributed in the housing (1) at equal intervals along the axial direction of the housing (1) (1) on. 3. The air-floating electric spindle according to claim 2, wherein a muffler is provided outside the air outlet passage. 4. The air-floating electric spindle according to claim 3, characterized in that, the stator (5) is located at one end in the inner axial direction of the casing (1). 5. The air-floating electric spindle according to claim 4, characterized in that, inside the casing (1) there is a balance that surrounds the end of the shaft (2) and can limit the vibration of the shaft (2) Ring (6). 6 . The air-floating electric spindle according to claim 5 , characterized in that, a pneumatic groove ( 31 ) that can assist gas to push the graphite bushing ( 3 ) is formed on the outside of the graphite bushing ( 3 ). 7 . 7. The air-floating electric spindle according to claim 6, characterized in that a filter is provided at the channel opening of the air intake channel (11). 8. The air-floating electric spindle according to claim 7, characterized in that, a water cooling channel (12) communicating with the outside of the housing (1) is formed inside the housing (1). 9. The air-floating electric spindle according to claim 8, characterized in that, the water-cooling channel (12) is located in the housing (1) outside the stator. 10. The air bearing electric spindle according to claim 9, characterized in that, the stator (5) is wrapped with a motor cooling jacket (7).