TWI694210B - Super high speed blower - Google Patents

Abstract

An ultra-high-speed blower includes an impeller, a motor, a rotating connection piece and a groove-type dynamic pressure gas radial bearing. The motor includes a rotor, a stator, a rotating shaft, an end cover and a housing. The housing is formed by an inner cylinder and an outer cylinder. The ring-shaped cylindrical structure of the cavity, the rotary connection piece is a cylindrical structure with a cavity, the rotary connection piece is sleeved on the rotating shaft close to the impeller, and is connected to the end of the impeller and the rotating shaft respectively, and the side is located outside The cavity formed by the cylinder and the inner cylinder; the groove type dynamic pressure gas radial bearing and the rotating shaft are located in the inner cylinder cavity, and the groove type dynamic pressure gas radial bearing is sleeved on the rotating shaft; the stator is fixed on the outer wall of the inner cylinder and the rotor It is fixed on the inner wall of the side of the rotating connector. The invention can realize ultra-high-speed operation in an air-floating state, and can significantly reduce the volume of the blower to achieve miniaturization.

Description

Super high speed blower

The invention relates to the technical field of high-precision machinery, in particular to an ultra-high-speed blower.

The blower is mainly used in the parts of office automation equipment that require a large amount of air. The wind generated by rotating the impeller discharges the heat generated inside the equipment to the outside to cool and cool the inside. The traditional blower usually uses a speed-increasing system to drive the compressor impeller to rotate to do work after increasing the speed of a common power-frequency motor, and has the following main defects: ①The speed-increasing system is very complicated, heavy, occupies a large area, and the cost is expensive; ②Not only Specially equipped lubricating oil system, which is prone to oil leakage problems and limited application range; ③gear transmission noise is large, there is a certain mechanical loss, and the power density of ordinary power frequency motor is low, the volume and weight are large, and the noise is high; ④ increase Both high-speed systems and ordinary power frequency motors require bearings. Due to the friction and life of the bearings, the rotation speed cannot be very high, resulting in low overall power density and huge size of the system. There are certain difficulties in matching the power with the compressor impeller ⑤ Due to the constant speed of the power frequency motor, if you want to adjust the air supply of the blower, you must add a very complicated air intake control system, which increases the manufacturing cost and control difficulty.

In order to solve the above-mentioned defects of the traditional motor blower, Chinese patent document CN102200136 B discloses an air suspension air supply adjustable high-speed motor direct-drive blower, which includes a compressor impeller, permanent magnet synchronous motor rotor, motor stator, front Radial air bearing, rear radial air bearing, axial thrust air bearing, volute and motor housing; one end of the rotor of the permanent magnet synchronous motor is connected to the compressor impeller, the motor stator drives the rotor of the permanent magnet synchronous motor to rotate, and the front diameter The radial air bearing, the rear radial air bearing, and the axial thrust air bearing levitate and support the rotor of the permanent magnet synchronous motor. The volute is located outside the compressor impeller. The motor housing is located on the motor stator, the front radial air bearing, and the rear radial. The outer periphery of the air bearing, axial thrust air bearing and permanent magnet synchronous motor rotor. Although the patented technology directly drives the compressor impeller through the rotor of the permanent magnet synchronous motor of the high-speed motor, it has the advantages of high efficiency, low loss, environmental protection, and wide application range. However, the patented technology still has the following problems: 1. The speed is still limited. At present, it can only achieve a maximum speed of 100,000 rpm; 2. It cannot be operated for a long time: the heat generated by high-speed operation cannot be effectively exported, so that the continuous working time cannot be long; 3. The stability of high-speed operation is not good, so that the actual operating efficiency is Less than the ideal goal; 4. The structure is still relatively complex and large in size, which cannot meet the requirements of today's miniaturization development.

In view of the above problems in the prior art, the object of the present invention is to provide an ultra-high-speed blower with high operating efficiency, good high-speed operating stability and long-term operation.

To achieve the above objectives, the technical solution adopted by the present invention is as follows: An ultra-high-speed blower, including an impeller and a motor, the motor includes a rotor, a stator, a rotating shaft, an end cover, and a housing; A groove-type dynamic pressure gas radial bearing, and the housing is an annular cylindrical structure formed of two cavities by the inner and outer cylinders, and the rotating connection member is a cylindrical structure with one cavity, The rotating connector is sleeved on the rotating shaft close to the impeller, and is connected to the impeller and the end of the rotating shaft respectively, and the side of the rotating connector is located in the cavity formed by the outer cylinder and the inner cylinder of the housing The groove type dynamic pressure gas radial bearing and the rotating shaft are located in the inner cylinder cavity of the housing, and the groove type dynamic pressure gas radial bearing is sleeved on the rotating shaft; the stator is fixed on the inner cylinder of the housing On the outer wall, the rotor is fixed on the inner wall of the side of the rotating connection.

As a preferred solution, a plurality of air guide vanes are provided on the side of the rotating connector located above the air flow channel formed by the end of the rotating shaft and the groove-type dynamic pressure gas radial bearing.

As a further preferred solution, a number of air inlet holes and a number of heat dissipation and exhaust holes are opened on the peripheral side of the outer cylinder of the housing.

As a preferred solution, the impeller is connected and fixed with a rotation bolt and a rotation shaft through a locking bolt.

As a further preferred solution, both the rotating shaft and the locking bolt are provided with cavities to reduce the weight of the blower.

As a preferred solution, the ultra-high-speed blower further includes an impeller shell, and the impeller shell is fixedly connected to the outer cylinder of the shell through bolts.

As a preferred solution, the groove type dynamic pressure gas radial bearing includes a bearing outer sleeve and a bearing inner sleeve, and the outer circumferential surface and both end surfaces of the bearing inner sleeve have groove patterns with regular shapes.

As a further preferred solution, the groove pattern on one end surface of the bearing inner sleeve forms a mirror symmetry with the groove pattern on the other end surface, and the axial contour of the groove pattern on the outer circumferential surface and the groove pattern on both end surfaces The radial contour lines all form a one-to-one correspondence and cross each other.

As a further preferred solution, the axial high line in the groove pattern on the outer circumferential surface of the bearing inner sleeve corresponds to the radial high line in the groove pattern on both end surfaces, and intersects each other before the circumferential chamfer of the end surface ; The axial median line in the groove pattern of the outer circumferential surface corresponds to the radial median line in the groove pattern of the two end surfaces, and intersects each other before the chamfering of the end surface; the groove pattern of the outer circumferential surface The axial low-level lines in the middle correspond to the radial low-level lines in the groove patterns on both end faces, and they meet each other before the circumferential chamfering of the end faces.

As a preferred solution, the fit clearance between the bearing inner sleeve and the bearing outer sleeve is 0.003 to 0.008 mm.

As a preferred solution, stop rings are provided at both ends of the bearing casing.

As an embodiment, the ultra-high speed blower further includes a hybrid dynamic pressure gas thrust bearing. The hybrid dynamic pressure gas thrust bearing includes two side discs and a sandwiched between the two side discs. The middle disc is provided with a foil-shaped elastic member between each side disc and the middle disc, and the mixed dynamic pressure gas thrust bearing is located in the cavity formed by the housing and the end cover, and is sleeved on the rotating shaft.

As a preferred solution, the end cover is fixedly connected with the middle disc adjustment ring of the hybrid dynamic pressure gas thrust bearing and the rear portion of the housing through bolts.

As a preferred solution, both end surfaces of the middle plate are provided with groove patterns with regular shapes, and the groove pattern on one end surface and the groove pattern on the other end surface are formed in mirror symmetry.

As a preferred solution, a groove pattern is also provided on the outer circumferential surface of the middle plate, and the shape of the groove pattern on the outer circumferential surface is the same as the groove pattern on both end surfaces, and the shaft of the groove pattern on the outer circumferential surface The contour lines form a one-to-one correspondence with the radial contour lines of the groove pattern at both end surfaces and they cross each other.

As a further preferred solution, the axial high line in the groove pattern on the outer circumferential surface of the middle plate corresponds to the radial high line in the groove pattern on the two end surfaces, and meet each other before the chamfering of the end surface circumference; the outer circumferential surface The axial median line in the groove pattern of the groove corresponds to the radial median line in the groove pattern of the two end surfaces, and intersects each other before the circumferential chamfer of the end surface; the axial direction in the groove pattern of the outer circumferential surface The low-level lines correspond to the radial low-level lines in the groove patterns on both end surfaces, and cross each other before the chamfering of the circumference of the end surfaces.

As a further preferred solution, a wear-resistant coating is provided on the mating surface of the foil-shaped elastic member matched with the middle plate.

As a further preferred solution, the gap between the foil-shaped elastic member and the middle plate is 0.003 to 0.008 mm.

As a further preferred solution, at least one end of the foil-shaped elastic member is fixed on the inner end surface of the corresponding side plate.

As a further preferred solution, there are a plurality of foil-shaped elastic members on each side plate, and they are evenly distributed along the inner end surface of the side plate.

As a further preferred solution, the foil-shaped elastic member fixed on one side plate and the foil-shaped elastic member fixed on the other side plate form mirror symmetry.

As a further preferred solution, a clamping groove for fixing the foil-shaped elastic member is provided on the inner end surface of the side plate.

As an embodiment, the foil-shaped elastic member is composed of a corrugated foil and a flat foil, and the arc-shaped convex tops of the corrugated foil are attached to the flat foil.

As another embodiment, the foil-shaped elastic member is composed of a wave foil and a flat foil, and the bottom edge of the transition between the wave arches of the wave foil is attached to the flat foil.

As yet another embodiment, the foil-shaped elastic member is composed of two flat foils, wherein the flat foil near the end surface of the side disc has a plurality of bubbles, and the curved convex top of the bubbles is attached to another flat foil Together.

The above groove patterns are all impeller shapes.

The above-mentioned foil-shaped elastic member is preferably subjected to surface heat treatment.

Compared with the prior art, the present invention has the following beneficial effects: Because the blower provided by the present invention uses gas as a bearing lubricant, it not only has no pollution, low friction loss, long use time, wide application range, energy saving and environmental protection And many other advantages, and the use of the structure, the heat dissipation effect is good, can ensure long-term stable operation; in particular, because the air bearing of the structure can achieve ultra-high speed operation in the air float state (tested, up to 100,000 ~ 450,000rpm limit speed), so for the same power requirements, the present invention can significantly reduce the size of the blower to achieve miniaturization, has the advantages of small footprint, convenient use, etc., has an important value to promote the development of miniaturized high-tech, relatively Significant progress in the existing technology.

The technical solution of the present invention will be described in further detail below with reference to the drawings and embodiments. Example 1

1 to FIG. 5: this embodiment provides an ultra-high-speed blower, including an impeller 1 and a motor 2, the motor 2 includes a rotor 21, a stator 22, a rotating shaft 23, an end cover 24 and a housing 25, its characteristics The reason is that it also includes a rotating connector 3, a groove-type dynamic pressure gas radial bearing 4 and a mixed dynamic pressure gas thrust bearing 5.

The housing 25 is an annular cylindrical structure with two cavities formed by the inner and outer cylinders. The rotating connecting member 3 is a cylindrical structure with a cavity. The rotating connecting member 3 is sleeved close to The rotating shaft 23 of the impeller 1 is connected to fit the ends of the impeller 1 and the rotating shaft 23, and the side portion 31 of the rotating connector 3 is located in the cavity formed by the outer cylinder 251 and the inner cylinder 252 of the housing; The grooved dynamic pressure gas radial bearing 4 and the rotating shaft 23 are both located in the cavity of the inner cylinder 252 of the housing, and the grooved dynamic pressure gas radial bearing 4 is sleeved on the rotating shaft 23; the stator 22 is fixed On the outer wall of the inner cylinder 252 of the housing, the rotor 21 is fixed on the inner wall of the side portion 31 of the rotary connection 3.

The groove type dynamic pressure gas radial bearing 4 includes a bearing outer casing 41 and a bearing inner sleeve 42; the hybrid type dynamic pressure gas thrust bearing 5 includes two side plates 51 and a middle plate sandwiched between the two side plates 52. A foil-shaped elastic member 53 is provided between each side disk 51 and the middle disk 52, and the hybrid dynamic pressure gas thrust bearing 5 is located in the cavity formed by the housing 25 and the end cover 24 and sleeved. Set on the rotating shaft 23.

A plurality of air guide vanes 32 are opened on the side portion 31 of the rotating connector 3 located above the air flow channel formed by the end of the rotating shaft 23 and the groove-type dynamic pressure gas radial bearing 4.

A plurality of air inlet holes 253 and a plurality of heat radiation and exhaust holes 254 are opened on the peripheral side of the outer cylinder 251 of the housing, and the air inlet holes 253 communicate with the air guide vanes 32.

The impeller 1 is connected and fixed to the rotating connecting piece 3 and the rotating shaft 23 by a locking bolt 6.

In order to further reduce the weight of the blower, the rotating shaft 23 and the locking bolt 6 each have a cavity (231/61).

As a preferred solution, the ultra-high-speed blower further includes an impeller shell 11, and the impeller shell 11 is fixedly connected to the outer cylinder 251 of the housing through bolts 7. The end cover 24 is fixedly connected to the middle disc adjustment ring 54 of the hybrid dynamic pressure gas thrust bearing 5 and the rear portion of the housing 25 through the bolt 8.

6 to FIG. 9: the outer circumferential surface of the bearing inner sleeve 42 and the left and right end surfaces have regular groove patterns 43 (such as 431, 432 and 433 in the figure, the grooves in this embodiment The patterns are all in the shape of an impeller), and the groove pattern 432 on the left end face and the groove pattern 433 on the right end face form mirror symmetry. The axial contour lines of the groove pattern 431 located on the outer circumferential surface of the bearing inner sleeve 42 form a one-to-one correspondence with the radial contour lines of the groove patterns (432 and 433) on the left and right end surfaces and intersect each other, namely: The axial high line 4311 in the groove pattern 431 of the circumferential surface corresponds to the radial high line (4321 and 4331) in the groove pattern (432 and 433) of the left and right end surfaces, and before the circumferential chamfer of the end surface Intersect each other; the axial median line 4312 in the groove pattern 431 on the outer circumferential surface corresponds to the radial median line (4322 and 4332) in the groove pattern (432 and 433) on the left and right end faces, and It meets each other before the end face chamfering; the axial low line 4313 in the groove pattern 431 on the outer circumferential surface and the radial low line (4323 and 4333) in the groove pattern (432 and 433) on the left and right end surfaces are both Correspond to each other and meet each other before the chamfering of the end face circumference.

By making the outer circumferential surface and both end surfaces of the bearing inner sleeve 42 have regular groove patterns (431, 432, and 433), the groove pattern 432 on the left end surface and the groove pattern 433 on the right end surface form mirror symmetry and the outer circumference The axial contour of the groove pattern 431 on the surface and the radial contour lines of the groove patterns (432 and 433) on the left and right end surfaces form a one-to-one correspondence and intersect each other, which can ensure the groove pattern of the impeller shape at both ends (432 and 433) The generated pressurized gas is continuously conveyed from the axis to the groove channel formed by the groove pattern 431 on the outer circumferential surface in the radial direction, so that the gas film required to support the high-speed running bearing is formed stronger, and The gas film is used as a lubricant for the dynamic pressure gas radial bearing, so it is beneficial to realize the high-speed and stable operation of the groove-type dynamic pressure gas radial bearing 4 in the air-floating state.

In addition, when the stop rings 44 are provided at both ends of the bearing outer casing 41, the self-sealing effect can be generated between the two end surfaces of the bearing inner sleeve 42 and the stop ring 44 under the driving of the high-speed rotary shaft, so that the groove pattern is continuous The generated dynamic pressure gas can be perfectly sealed and stored in the entire matching gap of the bearing, which fully guarantees the lubrication needs of the high-speed dynamic pressure gas radial bearing.

The matching clearance between the bearing outer sleeve 41 and the bearing inner sleeve 42 is preferably 0.003 to 0.008 mm to further ensure the reliability and stability of the bearing at high speed.

As shown in FIG. 10: A hybrid dynamic pressure gas thrust bearing provided in this embodiment includes: two side discs 51, a middle disc 52 is interposed between the two side discs 51, and each side disc 51 is A foil-shaped elastic member 53 is provided between the middle plates 52; the left end surface of the middle plate 52 is provided with a regular groove pattern 521, and the right end surface is provided with a regular groove pattern 522.

It can be seen with reference to FIGS. 11a and 11b that the groove pattern 521 on the left end surface and the groove pattern 522 on the right end surface of the middle plate 52 form mirror symmetry, and the radial contour line of the groove pattern 521 on the left end surface and the right end surface The radial contour lines of the groove pattern 522 form a one-to-one correspondence.

The groove patterns 521 and 522 have the same shape. In this embodiment, they are all in the shape of an impeller.

It can be further seen in conjunction with FIGS. 12a and 12b that the foil-shaped elastic member 53 is fixed on the inner end surface of the corresponding side disc 51 (for example, the left-side disc 511 to which the foil-shaped elastic member 53a is fixed as shown in FIG. 12a and the one shown in FIG. 12b The right-side disk 512 to which the foil-shaped elastic member 53b is fixed, and the foil-shaped elastic member 53a fixed to the left-side disk 511 and the foil-shaped elastic member 53b fixed to the right-side disk 512 form mirror symmetry. There may be a plurality of foil-type elastic members on each side plate (four are shown in the figure), and are evenly distributed along the inner end surface of the side plate.

By providing a foil-shaped elastic member 53 between the side plate 51 and the center plate 52, groove patterns (521 and 522) of regular shapes are provided on the left and right end surfaces of the center plate 52, and the groove pattern 521 on the left end surface and the right end surface The groove pattern 522 forms a mirror symmetry, so that it has both the rigid characteristics of the high limit speed of the groove dynamic pressure gas thrust bearing and the high impact resistance and load capacity of the foil type dynamic pressure gas thrust bearing. Flexible dynamic hybrid gas thrust bearing; because the foil-shaped elastic member 53 forms a wedge-shaped space with the middle disc 52, when the middle disc 52 rotates, the gas is driven and compressed into the wedge-shaped space due to its own viscous effect. As a result, the axial dynamic pressure can be significantly enhanced. Compared with the existing simple foil type dynamic pressure gas thrust bearing, it can have a limit speed that increases exponentially under the same load; at the same time, due to the addition of a foil-type elastic member 53, Under its elasticity, it can also significantly increase the bearing's load capacity, impact resistance and shaft vortex suppression ability. Compared with the existing simple groove type dynamic pressure gas thrust bearings, it can have a multiplied increase at the same speed. Impact resistance and load capacity.

10 and 13 and 14: the foil-shaped elastic member 53 is composed of a wave foil 531 and a flat foil 532, the top of the arc-shaped protrusion 5311 of the wave foil 531 is attached to the flat foil 532, The bottom edge 5312 between the wave arches of the wave foil 531 is in contact with the inner end surface of the corresponding side plate 51.

In order to further reduce the wear of the foil-shaped elastic member 53 by the high-speed running mid-disk 52 and extend the service life of the bearing, it is best to provide a wear-resistant coating on the mating surface of the foil-shaped elastic member 53 matched with the mid-disk 52 (Figure Not shown). Example 2

It can be seen with reference to FIGS. 15a, 15b, 16 to 20 that the hybrid dynamic pressure gas thrust bearing provided in this embodiment differs from Embodiment 1 only in:

The groove pattern 523 is also provided on the outer circumferential surface of the middle plate 52, and the groove pattern 523 on the outer circumferential surface has the same shape as the groove patterns (521 and 522) on the left and right end surfaces (in this embodiment Are in the shape of an impeller), and the axial contour of the groove pattern 523 on the outer circumferential surface and the radial contour lines of the groove pattern (521 and 522) on the left and right end surfaces form a one-to-one correspondence and intersect each other; namely:

The axial high line 5231 in the groove pattern 523 of the outer circumferential surface corresponds to the radial high line 5211 in the groove pattern 521 of the left end surface, and intersects each other before the chamfering of the end surface circumference; the groove pattern of the outer circumferential surface The axial median line 5232 in the pattern 523 corresponds to the radial median line 5212 in the groove pattern 521 on the left end face, and intersects each other before the circumferential chamfer of the end face; The axial low line 5233 corresponds to the radial low line 5213 in the groove pattern 521 on the left end face, and intersects each other before the circumferential chamfer of the end face (as shown in FIG. 18);

The axial high line 5231 in the groove pattern 523 on the outer circumferential surface corresponds to the radial high line 5221 in the groove pattern 522 on the right end surface, and they intersect each other before the chamfering of the end surface; the groove pattern on the outer circumferential surface The axial median line 5232 in the pattern 523 corresponds to the radial median line 5222 in the groove pattern 522 on the right end face, and intersects each other before the circumferential chamfer of the end face; the groove pattern 523 on the outer circumferential face The axial low line 5233 corresponds to the radial low line 5223 in the groove pattern 522 on the right end face, and intersects each other before the circumferential chamfer of the end face (as shown in FIG. 20).

When the groove pattern is also provided on the outer circumferential surface of the middle plate 52, and the shape of the groove pattern 523 on the outer circumferential surface is the same as the shape of the groove patterns (521 and 522) on the left and right end surfaces, and the outer circumference When the axial contour of the groove pattern 523 on the surface and the radial contour lines of the groove patterns (521 and 522) on the left and right end surfaces form a one-to-one correspondence and intersect with each other, the groove pattern on both end surfaces of the inner disc ( 521 and 522) The generated pressurized gas is continuously conveyed from the axis to the groove channel formed by the groove pattern 523 on the outer circumferential surface in the radial direction, so that the gas film required to support the high-speed running bearing is formed stronger, and the gas The membrane acts as a lubricant for the dynamic pressure gas thrust bearing, so it can further ensure the high-speed and stable operation of the hybrid dynamic pressure gas thrust bearing in the air-floating state, and provide further guarantee for the realization of the high limit speed of the blower.

A clamping groove 513 (as shown in FIG. 16) for fixing the foil-shaped elastic member 53 is provided on the inner end surface of the side plate 51.

The gap between the foil-shaped elastic member 53 and the middle plate 52 is preferably 0.003 to 0.008 mm, to further ensure the reliability and stability of the high-speed operation of the bearing.

In order to better meet the performance requirements of high-speed operation, the foil-shaped elastic member 53 is preferably subjected to surface heat treatment.

In addition, it should be noted that the composition structure of the foil-shaped elastic member 53 according to the present invention is not limited to that described in the above embodiments, and can also be composed of a wave foil and a flat foil, but the bottom edge of the wave arch transition between the wave arch and the The flat foil is attached; alternatively, it is directly composed of two flat foils, wherein the flat foil near the end surface of the side plate has a number of bubbles, and the curved convex tip of the bubble is attached to another flat foil; or Other existing structures.

After testing, the bearing provided by the present invention can reach the limit speed of 100,000 to 450,000 rpm in the air-floating state. Therefore, for the same power requirement, the present invention can significantly reduce the size of the blower and achieve miniaturization. Development has important value.

Finally, it is necessary to point out here that the above content is only used for further detailed description of the technical solution of the present invention, and cannot be construed as a limitation of the protection scope of the present invention. Essential improvements and adjustments are within the scope of the present invention.

1‧‧‧Impeller 11‧‧‧Impeller shell 2‧‧‧Motor 21‧‧‧Rotor 22‧‧‧Stator 23‧‧‧Rotating shaft 231‧‧‧Cavity 24‧‧‧End cover 25‧‧‧Case 251 ‧‧‧Outer tube 252‧‧‧Inner tube 253‧‧‧ Inlet hole 254‧‧‧ Heat dissipation vent hole 3‧‧‧Rotating connector 31‧‧‧Side part 32‧‧‧Air guide blade 4‧‧‧ Groove dynamic pressure gas radial bearing 41‧‧‧bearing outer casing 42‧‧‧bearing inner sleeve 43‧‧‧groove pattern 431‧‧‧groove pattern on the outer circumferential surface 4311‧‧‧axial high line 4312‧‧ ‧Axial median line 4313 ‧‧‧Axial low line 432 ‧‧‧Slotted pattern on the left end 4321 ‧‧‧Radial high line 4322 ‧‧‧Radial neutral line 4323 ‧‧‧Radial low line 433 ‧‧‧Slotted pattern on the right end 4331‧‧‧Radial high line 4332‧‧‧Radial neutral line 4333‧‧‧Radial low line 44‧‧‧Stop ring 5‧‧‧ Hybrid dynamic pressure gas stop Push bearing 51 ‧ ‧ ‧ side plate 511 ‧ ‧ ‧ left side plate 512 ‧ ‧ ‧ right side plate 513 ‧ ‧ ‧ slot 52 52 ‧ ‧ ‧ center plate 521 ‧ ‧ ‧ groove pattern on the left end 5211 ‧ ‧ ‧ radial high line 5212 ‧‧‧Radial median line 5213‧‧‧Radial low line 522‧‧‧Right groove pattern 5221‧‧‧Radial high line 5222‧‧‧Radial neutral line 5223‧‧‧Radial low Line 523‧‧‧Slotted pattern on the outer circumferential surface 5231‧‧‧Axial high line 5232‧‧‧Axial neutral line 5233‧‧‧Axial low line 53,53a,53b‧‧‧Foil-shaped elastic member 531 ‧‧‧Wave foil 5311‧‧‧arc convex 5312‧‧‧wave arch bottom edge 532‧‧‧flat foil 54‧‧‧ mid plate adjustment ring 6, 7, 8‧‧‧ bolt 61‧‧‧ empty Cavity

1 is a schematic diagram of a front perspective structure of an ultra-high-speed blower provided in Example 1; FIG. 2 is a schematic diagram of a front view of the ultra-high-speed blower provided in Example 1; FIG. 3 is a view taken along line AA in FIG. 2; FIG. 4 is an example 1 is a schematic view of the three-dimensional structure of the rotating connector provided; FIG. 5 is a schematic view of the three-dimensional structure of the housing provided in Example 1; FIG. 6 is a partially divided left-view three-dimensional structure of the grooved dynamic pressure gas radial bearing provided in Example 1 FIG. 7 is a partially enlarged view of B in FIG. 6; FIG. 8 is a partially divided right side perspective schematic view of the grooved dynamic pressure gas radial bearing provided in Example 1; FIG. 9 is a partially enlarged view of C in FIG. 8 Figure 10 is a schematic cross-sectional structural view of the hybrid dynamic pressure gas thrust bearing provided in Example 1; Figure 11a is a left side view of the middle disc described in Example 1; Figure 11b is a right side view of the middle disc described in Example 1 FIG. 12a is a right side view of the left-side disc fixed with the foil-shaped elastic member described in Example 1; FIG. 12b is a left side view of the right-side disc fixed with the foil-shaped elastic member described in Embodiment 1; FIG. 13 is Example 1 is a schematic cross-sectional structural view of a foil-shaped elastic member provided in Example 1; FIG. 14 is a perspective structural view of a foil-shaped elastic member provided in Example 1; FIG. 15a is a left side of a hybrid dynamic pressure gas thrust bearing provided in Example 2 FIG. 15b is a schematic view of the right-side perspective structure of the hybrid dynamic pressure gas thrust bearing provided in Example 2; FIG. 16 is a partially-divided perspective view of the hybrid dynamic pressure gas thrust bearing provided in Example 2; FIG. 17 is a schematic view of the left side perspective structure of the middle plate in Example 2; FIG. 18 is a partial enlarged view of D in FIG. 17; FIG. 19 is a schematic view of the right side perspective structure of the middle plate in Example 2; FIG. 20 is Enlarged view of E in FIG. 19.

1‧‧‧Impeller

11‧‧‧Impeller shell

2‧‧‧Motor

21‧‧‧Rotor

22‧‧‧Stator

23‧‧‧spindle

231‧‧‧ Cavity

24‧‧‧End cover

25‧‧‧Housing

251‧‧‧Outer cylinder

252‧‧‧Inner tube

253‧‧‧Air inlet

254‧‧‧ exhaust vent

3‧‧‧Rotating connector

31‧‧‧Side

32‧‧‧Air guide blade

4‧‧‧Slot type dynamic pressure gas radial bearing

41‧‧‧bearing jacket

42‧‧‧Bearing inner sleeve

44‧‧‧stop ring

5‧‧‧ Hybrid dynamic pressure gas thrust bearing

51‧‧‧Side plate

52‧‧‧Mid-range

53‧‧‧Foil-shaped elastic parts

54‧‧‧ Central adjustment ring

6, 7, 8 ‧‧‧ bolt

61‧‧‧ Cavity

Claims (13)

An ultra-high-speed blower, including an impeller, a motor, a rotating connection piece and a groove-type dynamic pressure gas radial bearing, the motor includes a rotor, a stator, a rotating shaft, an end cover and a housing, the housing is composed of an inner and outer cylinder An annular cylindrical structure forming two cavities, the rotating connecting member is a cylindrical structure having a cavity, the rotating connecting member is sleeved on the rotating shaft close to the impeller, and is separated from the ends of the impeller and the rotating shaft Matching connection, the side part is located in the cavity formed by the outer cylinder and the inner cylinder of the housing; the groove type dynamic pressure gas radial bearing and the rotating shaft are both located in the inner cylinder cavity of the housing, and the groove The radial bearing of dynamic pressure gas is sleeved on the rotating shaft; the stator is fixed on the outer wall of the inner cylinder of the housing, and the rotor is fixed on the inner wall of the side of the rotating connector, wherein the dynamic pressure gas is located on the rotating shaft and the groove A plurality of air guide vanes are opened on the side of the rotating connecting member above the air flow channel formed by the end of the radial bearing. The ultra-high-speed blower according to claim 1, wherein a plurality of air intake holes and a plurality of heat radiation and exhaust holes are opened on the peripheral side of the outer cylinder of the housing. The ultra-high-speed blower according to claim 1, wherein the groove type dynamic pressure gas radial bearing includes a bearing outer sleeve and a bearing inner sleeve, and the bearing inner sleeve has a groove shape with a regular shape on the outer circumferential surface and both end surfaces Pattern. The ultra-high-speed blower according to claim 3, wherein the groove pattern on one end surface of the bearing inner sleeve forms a mirror symmetry with the groove pattern on the other end surface, and the axial direction of the groove pattern on the outer circumferential surface The contour lines form a one-to-one correspondence with the radial contour lines of the groove pattern on both end surfaces and intersect each other. The ultra-high-speed blower according to claim 4, wherein the axial high line in the groove pattern on the outer circumferential surface of the bearing inner sleeve corresponds to the radial high line in the groove pattern on both end surfaces, And they meet each other before the chamfering of the end face circumference; the axial median line in the groove pattern on the outer circumference face is The radial median lines in the groove patterns on both ends correspond to each other, and they intersect each other before the circumferential chamfer of the end faces; the axial low line in the groove patterns on the outer circumferential surface and the groove patterns on both ends The radial low-level lines in each correspond to each other, and they meet each other before the chamfering of the end face circumference. The ultra-high-speed blower according to any one of claims 1 to 5, wherein the ultra-high-speed blower further includes a hybrid dynamic pressure gas thrust bearing, and the hybrid dynamic pressure gas thrust bearing includes two The side disc and the middle disc sandwiched between the two side discs are provided with a foil-shaped elastic member between each side disc and the middle disc, and the hybrid dynamic pressure gas thrust bearing is located on the housing and the end cover The formed cavity is sleeved on the rotating shaft. The ultra-high-speed blower according to claim 6, wherein both ends of the middle plate are provided with groove patterns having regular shapes, and the groove patterns on one end face and the groove pattern on the other end face are mirror-symmetrical. The ultra-high-speed blower according to claim 7, wherein a groove pattern is also provided on the outer circumferential surface of the middle plate, and the shape of the groove pattern on the outer circumferential surface is the same as the groove pattern on both end surfaces , And the axial contour lines of the groove pattern on the outer circumferential surface and the radial contour lines of the groove pattern on both end surfaces form a one-to-one correspondence and intersect each other. The ultra-high-speed blower according to claim 8, wherein the axial high line in the groove pattern on the outer circumferential surface of the center plate corresponds to the radial high line in the groove pattern on both end surfaces, and is circumferential on the end surface Before the chamfering, they meet each other; the axial median line in the groove pattern on the outer circumferential surface corresponds to the radial median line in the groove pattern on both ends, and they meet each other before the chamfering of the end surface; The axial low line in the groove pattern on the outer circumferential surface corresponds to the radial low line in the groove pattern on both end surfaces, and intersects each other before the circumferential chamfer of the end surface. The ultra-high-speed blower according to claim 6, wherein the foil-shaped elastic member fixed on one side plate forms mirror symmetry with the foil-shaped elastic member fixed on the other side plate. The ultra-high-speed blower according to claim 6, wherein the foil-shaped elastic member is composed of a corrugated foil and a flat foil, the arc-shaped convex tip of the corrugated foil fits with the flat foil, and the corrugated wave arch The bottom edge of the intermediate transition fits with the inner end surface of the corresponding side disc. The ultra-high-speed blower according to claim 6, wherein the foil-shaped elastic member is composed of a wave foil and a flat foil, and the bottom edge of the transition between the wave arches of the wave foil is attached to the flat foil. The ultra-high-speed blower according to claim 6, wherein the foil-shaped elastic member is composed of two flat foils, wherein the flat foil near the end surface of the side disc has a plurality of bubbles, and the arc-shaped convex top ends of the bubbles The other flat foil fits.

Images