1. An air suspension blower with a filtering system is characterized by comprising a motor outer barrel (1), a first end cover (2), a second end cover (3), a motor rotating shaft (4), an air bearing device (5), a blowing impeller (6), a heat dissipation impeller (7), an air inlet end cover (8) and an air inlet filter (9); the first end cover (2) and the second end cover (3) are respectively fixed at two ends of the motor outer cylinder (1), a motor inner cylinder (101) is embedded in an inner hole of the motor outer cylinder (1), and a motor stator (102) is fixedly embedded in the motor inner cylinder (101); the air inlet end cover (8) is fixed on the second end cover (3), and the air bearing device (5) is used for supporting and limiting the motor rotating shaft (4) in the radial direction and the axial direction; the air inlet end of the air inlet filter (9) is communicated with the outside, and the air inlet end cover (8) is provided with a first channel (11); the air inlet end of the heat dissipation impeller (7) is communicated with the air outlet end of the air inlet filter (9) through one end of a first channel (11), and the air outlet end of the heat dissipation impeller (7) is communicated with the other end of the first channel (11); the second end cover (3) is provided with a second channel (12); the motor rotating shaft (4) is provided with a motor rotor (10), the motor stator (102) and the motor rotor (10) are oppositely arranged, and a gap exists between the motor stator and the motor rotor in the radial direction to form a third channel (13); the motor inner cylinder (101) is provided with a fourth channel (14), and the motor outer cylinder (1) is provided with a fifth channel (15) communicated with the outside; the first channel (11), the second channel (12), the third channel (13) and the fifth channel (15) are communicated in sequence, and the first channel (11), the second channel (12), the fourth channel (14) and the fifth channel (15) are communicated in sequence.

2. The air suspension blower with the filtering system as claimed in claim 1, wherein a clamp (91) is arranged at the air outlet end of the air inlet filter (9), and the air inlet filter (9) is fixedly connected to the air inlet end cover (8) through the clamp (91).

3. The air suspension blower with the filtering system as claimed in claim 1, characterized in that the end face of the air inlet end cover (8) is provided with a fluororubber (81), and the fluororubber (81) is used for sealing the axial direction between the air inlet filter (9) and the air inlet end cover (8).

4. The air suspension blower with the filtering system according to claim 1, wherein the motor shaft (4) comprises a first rotating shaft (51), a second rotating shaft (52) and a third rotating shaft (53), the motor rotor (10) is arranged on the first rotating shaft (51), and one end of the second rotating shaft (52) and one end of the third rotating shaft (53) are respectively fixedly connected with two ends of the first rotating shaft (51).

5. Air suspension blower with filter system according to claim 1, characterised in that the air bearing means (5) comprise an air suspension radial bearing (61) and an air suspension axial bearing (62); the two air suspension radial bearings (61) are respectively fixed on the first end cover (2) and the second end cover (3), and the two air suspension radial bearings (61) are respectively rotatably connected with the motor rotating shaft (4); the air suspension axial bearing (62) comprises a thrust disc (63) and axial limiting parts (64), the thrust disc (63) is connected with the motor rotating shaft (4), and the two axial limiting parts (64) are respectively located on two axial sides of the thrust disc (63).

6. Air suspension blower with filtering system according to claim 4, characterized in that the second shaft (52) comprises a first shaft section (521), a second shaft section (522), a third shaft section (523) and a fourth shaft section (524); the outer walls of the first shaft section (521) and the fourth shaft section (524) are provided with external threads, and a second boss (54) is arranged at one end, located at the second rotating shaft (52), of the first rotating shaft (51); the second boss (54) is provided with an inner hole with internal threads, and the external threads of the first shaft section (521) and the internal threads of the inner hole of the second boss (54) are screwed to the joint position of the end surface of the inner side of the second shaft section (522) and the end surface of the outer side of the second boss (54).

7. The air suspension blower with the filtering system is characterized in that a second shaft sleeve (55) is sleeved on the outer wall of the second boss (54), and a PVD coating is arranged on the outer surface of the second shaft sleeve (55); the second rotating shaft (52) penetrates through an inner hole of a second shaft sleeve (55), and the outer wall of the second shaft sleeve (55) is rotatably connected with an air suspension radial bearing (61); the second shaft sleeve (55) is provided with a second shaft sleeve boss (551), the outer wall of the second shaft sleeve boss (551) is sleeved with a sealing disc (550), and the heat dissipation impeller (7) is sleeved on the outer wall of the second shaft sleeve boss (551) and is positioned on the outer side of the sealing disc (550); a locking nut (553) is sleeved on the external thread of the fourth shaft section (524); when the locking nut (553) is locked, the second shaft sleeve (55) is axially locked on the second rotating shaft (52), and the sealing disc (550) and the heat dissipation impeller (7) are axially locked on the second shaft sleeve (55).

8. The air suspension blower with filter system as recited in claim 4, characterized in that the third shaft (53) comprises a fifth shaft segment (531), a sixth shaft segment (532), a seventh shaft segment (533) and an eighth shaft segment (534); the outer walls of the fifth shaft section (531) and the eighth shaft section (534) are provided with external threads, and a third boss (56) is arranged at one end, located at the third rotating shaft (53), of the first rotating shaft (51); an inner hole with an internal thread is formed in the third boss (56), and the external thread of the five shaft section (531) and the internal thread of the inner hole of the third boss (56) are screwed to the position where the end face of the inner side of the sixth shaft section (532) is attached to the end face of the outer side of the third boss (56).

9. The air suspension blower with the filtering system is characterized in that a third shaft sleeve (57) is sleeved on the outer wall of the third boss (56), and the outer surface of the third shaft sleeve (57) is provided with a PVD coating; the third rotating shaft (53) penetrates through an inner hole of the third shaft sleeve (57), and the outer wall of the third shaft sleeve (57) is rotatably connected with the air suspension radial bearing (61); the third shaft sleeve (57) is provided with a third shaft sleeve boss (571), the thrust disc (63) and the blast impeller (7) are sleeved on the outer wall of the third shaft sleeve boss (571) from inside to outside in the axial direction, and a locking nut (553) is sleeved on an external thread of the eighth shaft section (534); when the locking nut (553) is locked, the third shaft sleeve (57) is axially locked on the third rotating shaft (53), and the thrust disc (63) and the blast impeller (7) are axially locked on the third shaft sleeve (57).

10. Air suspension blower with filtering system according to claim 5, characterized in that the first end cap (2) is provided with a first thrust disc groove (21) and a second thrust disc groove (22); the first thrust disc groove (21) and the second thrust disc groove (22) are oppositely arranged at two ends of the thrust disc (63), and the two axial limiting parts (64) are respectively fixed on the first thrust disc groove (21) and the second thrust disc groove (22).

Background

The air suspension centrifugal blower is a new concept blower, and adopts three core high-end technologies of an ultra-high speed direct connection motor, an air suspension bearing and a high-precision single-stage centrifugal impeller, so that a new era of high-efficiency, high-performance, low-noise and low-energy consumption blowers is created.

The Chinese invention patent application (publication No. CN112228361A, published: 20210115) discloses an air suspension centrifugal blower, which comprises a motor, a volute, an impeller shaft, a bearing rotating shaft, an air suspension radial bearing and an air suspension thrust bearing, wherein the front end and the rear end of a motor rotor are respectively in rotary connection with the air suspension radial bearing through the bearing rotating shaft, the bearing rotating shaft positioned at the front end of the motor is in rotary connection with the air suspension thrust bearing through a thrust disc, the friction surfaces of the bearing rotating shaft and the thrust disc are provided with PVD coatings, the friction coefficient of the PVD coatings is less than or equal to 0.1, and the thickness of the PVD coatings is 2-8 mu m; the friction surfaces of the air suspension radial bearing and the air suspension thrust bearing are provided with PTFE coatings, the friction coefficient of the PTFE coatings is less than or equal to 0.05, and the thickness of the PTFE coatings is 0.02 mm-0.05 mm. The invention has the advantages of compact structure, high efficiency, long service life, good stability, high starting and stopping times, low motor temperature rise and the like.

The prior art has the following defects: the heat dissipation impeller directly absorbs unfiltered wind from the outside to cool the air blower, and can bring external impurities into the air blower, so that dust is deposited in the air blower, and a bearing and a motor are damaged.

Disclosure of Invention

The purpose of the invention is: to the problem, the air suspension blower with the filtering system is provided, wherein the air inlet part of the blower is connected with an air filter to filter cooling air, so that external impurities are prevented from entering the blower, and a bearing and a motor are protected.

In order to achieve the purpose, the invention adopts the following technical scheme:

an air suspension blower with a filtering system comprises a motor outer cylinder, a first end cover, a second end cover, a motor rotating shaft, an air bearing device, a blower impeller, a heat dissipation impeller, an air inlet end cover and an air inlet filter; the first end cover and the second end cover are respectively fixed at two ends of the motor outer cylinder, the inner hole of the motor outer cylinder is embedded with the motor inner cylinder, and the motor stator is fixedly embedded on the motor inner cylinder; the air bearing device is used for supporting and limiting the motor rotating shaft in the radial direction and the axial direction; the air inlet end of the air inlet filter is communicated with the outside, and the air inlet end cover is provided with a first channel; the air inlet end of the heat dissipation impeller is communicated with the air inlet air filtering end through one end of the first channel, and the air outlet end of the heat dissipation impeller is communicated with the other end of the first channel; the second end cover is provided with a second channel; the motor rotating shaft is provided with a motor rotor, the motor stator and the motor rotor are oppositely arranged, and a gap exists between the motor stator and the motor rotor in the radial direction to form a third channel; the motor inner cylinder is provided with a fourth channel, and the motor outer cylinder is provided with a fifth channel communicated with the outside; the first channel, the second channel, the third channel and the fifth channel are communicated in sequence, and the first channel, the second channel, the fourth channel and the fifth channel are communicated in sequence.

Preferably, the air-out end of air inlet air filter is provided with the clamp, and air inlet air filter passes through clamp fixed connection to air inlet end cover.

Preferably, the end face of the air inlet end cover is provided with fluororubber, and the fluororubber is used for sealing the axial direction between the air inlet filter and the air inlet end cover.

Preferably, the motor rotating shaft comprises a first rotating shaft, a second rotating shaft and a third rotating shaft, the motor rotor is arranged on the first rotating shaft, and one end of the second rotating shaft and one end of the third rotating shaft are fixedly connected with two ends of the first rotating shaft respectively.

Preferably, the air bearing means comprises an air-bearing radial bearing and an air-bearing axial bearing; the two air suspension radial bearings are respectively fixed on the first end cover and the second end cover and are respectively rotatably connected with the motor rotating shaft; the air suspension axial bearing comprises a thrust disc and axial limiting parts, the thrust disc is connected with a motor rotating shaft, and the two axial limiting parts are respectively positioned on two axial sides of the thrust disc.

Preferably, the second rotating shaft comprises a first shaft section, a second shaft section, a third shaft section and a fourth shaft section; the outer wall of the first shaft section and the outer wall of the fourth shaft section are both provided with external threads, and a second boss is arranged at one end of the first rotating shaft, which is positioned at the second rotating shaft; the second boss is provided with an inner hole with internal threads, and the external threads of the first shaft section and the internal threads of the inner hole of the second boss are screwed to the position where the end surface of the inner side of the second shaft section is attached to the end surface of the outer side of the second boss. A second shaft sleeve is sleeved on the outer wall of the second boss, and a PVD coating is arranged on the outer surface of the second shaft sleeve; the second rotating shaft penetrates through an inner hole of the second shaft sleeve, and the outer wall of the second shaft sleeve is rotatably connected with the air suspension radial bearing; the second shaft sleeve is provided with a second shaft sleeve boss, the outer wall of the second shaft sleeve boss is sleeved with a sealing disc, and the heat dissipation impeller is sleeved on the outer wall of the second shaft sleeve boss and is positioned outside the sealing disc; a locking nut is sleeved on the external thread of the fourth shaft section; when the locking nut is locked, the second shaft sleeve is axially locked on the second rotating shaft, and the sealing disc and the heat dissipation impeller are axially locked on the second shaft sleeve.

Preferably, the third rotating shaft comprises a fifth shaft section, a sixth shaft section, a seventh shaft section and an eighth shaft section; the outer wall of the fifth shaft section and the outer wall of the eighth shaft section are both provided with external threads, and a third boss is arranged at one end of the first rotating shaft, which is positioned at the third rotating shaft; the third boss is provided with an inner hole with internal threads, and the external threads of the five shaft sections and the internal threads of the inner hole of the third boss are screwed to the joint position of the end face of the inner side of the sixth shaft section and the end face of the outer side of the third boss. A third shaft sleeve is sleeved on the outer wall of the third boss, and a PVD coating is arranged on the outer surface of the third shaft sleeve; the third rotating shaft penetrates through an inner hole of the third shaft sleeve, and the outer wall of the third shaft sleeve is rotatably connected with the air suspension radial bearing; the third shaft sleeve is provided with a third shaft sleeve boss, the thrust disc and the blast impeller are sleeved on the outer wall of the third shaft sleeve boss from inside to outside in the axial direction, and a locking nut is sleeved on an external thread of the eighth shaft section; when the locking nut is locked, the third shaft sleeve is axially locked on the third rotating shaft, and the thrust disc and the blast impeller are axially locked on the third shaft sleeve.

Preferably, the first end cap is provided with a first thrust disc groove and a second thrust disc groove; the first thrust disc groove and the second thrust disc groove are oppositely arranged at two ends of the thrust disc, and the two axial limiting parts are respectively fixed on the first thrust disc groove and the second thrust disc groove.

The air suspension blower with the filtering system has the advantages that:

the blower is in operation: the heat dissipation impeller rotates to generate negative pressure, and external air is sucked into the first channel after being filtered by the air inlet filter; then, the heat is discharged to the outside along the second channel, the third channel and the fifth channel as well as the second channel, the fourth channel and the fifth channel in sequence; in this way, the external cooling air is filtered by the air inlet filter when entering the blower; thereby preventing external impurities from entering the blower, and further preventing dust from being accumulated in the blower and damaging the bearing and the motor; the blower is provided with a filtering device, and the requirement on the external environment is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a partially enlarged schematic view of the present invention.

Fig. 3 is a partially enlarged schematic view of the present invention.

L-the direction of gas flow.

Detailed Description

The following describes in detail embodiments of the present invention with reference to the drawings.

Example 1

As shown in fig. 1, the air suspension blower with the filtering system comprises a motor outer cylinder 1, a first end cover 2, a second end cover 3, a motor rotating shaft 4, an air bearing device 5, a blower impeller 6, a heat dissipation impeller 7, an air inlet end cover 8 and an air inlet filter 9; the first end cover 2 and the second end cover 3 are respectively fixed at two ends of the motor outer cylinder 1, the inner hole of the motor outer cylinder 1 is embedded with a motor inner cylinder 101, and a motor stator 102 is fixedly embedded on the motor inner cylinder 101; the air inlet end cover 8 is fixed on the second end cover 3, and the air bearing device 5 is used for supporting and limiting the motor rotating shaft 4 in the radial direction and the axial direction; the air inlet end of the air inlet filter 9 is communicated with the outside, and the air inlet end cover 8 is provided with a first channel 11; the air inlet end of the heat dissipation impeller 7 is communicated with the air outlet end of the air inlet air filter 9 through one end of a first channel 11, and the air outlet end of the heat dissipation impeller 7 is communicated with the other end of the first channel 11; the second end cap 3 is provided with a second channel 12; the motor rotating shaft 4 is provided with a motor rotor 10, the motor stator 102 and the motor rotor 10 are oppositely arranged, and a gap exists between the motor stator and the motor rotor 10 in the radial direction to form a third channel 13; the motor inner cylinder 101 is provided with a fourth channel 14, and the motor outer cylinder 1 is provided with a fifth channel 15 communicated with the outside; the first channel 11, the second channel 12, the third channel 13 and the fifth channel 15 are communicated in sequence, and the first channel 11, the second channel 12, the fourth channel 14 and the fifth channel 15 are communicated in sequence. The blower is in operation: the heat dissipation impeller 7 rotates to generate negative pressure, external air is filtered by the air inlet filter 9 and then is sucked into the first channel 11; then, the heat is discharged to the outside along the second channel 12, the third channel 13, the fifth channel 15, the second channel 12, the fourth channel 14 and the fifth channel 15 in sequence; in this way, the external cooling air is filtered by the air inlet filter 9 when entering the blower; thereby preventing external impurities from entering the blower, and further preventing dust from being accumulated in the blower and damaging the bearing and the motor; the blower is provided with a filtering device, and the requirement on the external environment is reduced.

The air-out end of the air inlet air filter 9 is provided with a clamp 91, and the air inlet air filter 9 is fixedly connected to the air inlet end cover 8 through the clamp 91. The end face of the air inlet end cover 8 is provided with fluororubber 81, and the fluororubber 81 is used for sealing the axial direction between the air inlet filter 9 and the air inlet end cover 8 so as to prevent external impurities from entering the interior of the blower through a gap between the hoop 91 and the air inlet end cover 8.

The motor rotating shaft 4 comprises a first rotating shaft 51, a second rotating shaft 52 and a third rotating shaft 53, the motor rotor 10 is arranged on the first rotating shaft 51, and one end of the second rotating shaft 52 and one end of the third rotating shaft 53 are respectively fixedly connected with two ends of the first rotating shaft 51.

The air bearing device 5 comprises an air-bearing radial bearing 61 and an air-bearing axial bearing 62; the two air suspension radial bearings 61 are respectively fixed on the first end cover 2 and the second end cover 3, and the two air suspension radial bearings 61 are respectively rotatably connected with the motor rotating shaft 4 so as to radially support and limit the motor rotating shaft 4; (ii) a The air suspension axial bearing 62 comprises a thrust disc 63 and axial limiting parts 64, the thrust disc 63 is connected with the motor rotating shaft 4, and the two axial limiting parts 64 are respectively positioned at two axial sides of the thrust disc 63 so as to axially support and limit the motor rotating shaft 4. .

As shown in fig. 2, the second rotating shaft 52 includes a first shaft segment 521, a second shaft segment 522, a third shaft segment 523 and a fourth shaft segment 524; the outer walls of the first shaft section 521 and the fourth shaft section 524 are both provided with external threads, and the first rotating shaft 51 is provided with a second boss 54 at one end of the second rotating shaft 52; the second boss 54 is provided with an inner hole with an internal thread, and the external thread of the first shaft section 521 and the internal thread of the inner hole of the second boss 54 are screwed to the position where the end surface of the inner side of the second shaft section 522 is attached to the end surface of the outer side of the second boss 54.

A second shaft sleeve 55 is sleeved on the outer wall of the second boss 54, and a PVD coating is arranged on the outer surface of the second shaft sleeve 55; the second rotating shaft 52 passes through an inner hole of a second shaft sleeve 55, and the outer wall of the second shaft sleeve 55 is rotatably connected with an air suspension radial bearing 61; the second shaft sleeve 55 is provided with a second shaft sleeve boss 551, the outer wall of the second shaft sleeve boss 551 is sleeved with a sealing disc 550, radial force is generated when the sealing disc 550 rotates, and airflow is prevented from passing between the sealing disc 550 and the second end cover 3 to generate series flow, so that the cooling effect is influenced; the heat dissipation impeller 7 is sleeved on the outer wall of the second shaft sleeve boss 551 and is positioned outside the sealing disc 550; a lock nut 553 is sleeved on the external thread of the fourth shaft section 524; when the lock nut 553 is locked, the second hub 55 is axially locked to the second rotary shaft 52, and the seal disk 550 and the heat-dissipating impeller 7 are axially locked to the second hub 55. When the air suspension blower is just started, the second shaft sleeve 55 is not supported and suspended by the air suspension radial bearing 61, and dry friction is generated between the outer wall of the second shaft sleeve 55 and the air suspension radial bearing 61; and because the surface of the second shaft sleeve 55 is smooth and has a PVD coating, the friction coefficient is low, the hardness is high, and the contact friction times can reach more than 40000 times. When the contact friction is damaged at the upper limit, only the worn second shaft bushing 55 needs to be replaced without replacing the second rotating shaft 52, thereby increasing the service life of the second rotating shaft 52.

As shown in fig. 3, the third rotating shaft 53 includes a fifth shaft segment 531, a sixth shaft segment 532, a seventh shaft segment 533 and an eighth shaft segment 534; the outer walls of the fifth shaft section 531 and the eighth shaft section 534 are both provided with external threads, and the first rotating shaft 51 is provided with a third boss 56 at one end of the third rotating shaft 53; the third boss 56 is provided with an inner hole with an internal thread, and the external thread of the five-axis section 531 and the internal thread of the inner hole of the third boss 56 are screwed to the joint position of the end surface of the inner side of the sixth axis section 532 and the end surface of the outer side of the third boss 56.

A third shaft sleeve 57 is sleeved on the outer wall of the third boss 56, and a PVD coating is arranged on the outer surface of the third shaft sleeve 57; the third rotating shaft 53 passes through an inner hole of the third shaft sleeve 57, and the outer wall of the third shaft sleeve 57 is rotatably connected with the air suspension radial bearing 61; the third shaft sleeve 57 is provided with a third shaft sleeve boss 571, the thrust disc 63 and the blast impeller 6 are sleeved on the outer wall of the third shaft sleeve boss 571 from inside to outside in the axial direction, and a locking nut 553 is sleeved on the external thread of the eighth shaft section 534; when the lock nut 553 is locked, the third shaft bushing 57 is axially locked to the third rotary shaft 53, and the thrust disk 63 and the blower impeller 6 are axially locked to the third shaft bushing 57. When the air suspension blower is just started, the third shaft sleeve 57 is not supported and suspended by the air suspension radial bearing 61, and dry friction is generated between the outer wall of the third shaft sleeve 57 and the air suspension radial bearing 61; and because the surface of the third shaft sleeve 57 is smooth and has a PVD coating, the friction coefficient is low, the hardness is high, and the contact friction times can reach more than 40000 times. When the contact friction reaches the upper limit and is damaged, only the worn third shaft sleeve 57 needs to be replaced, and the third rotating shaft 53 does not need to be replaced, so that the service life of the third rotating shaft 53 is prolonged.

The first end cap 2 is provided with a first thrust disc groove 21 and a second thrust disc groove 22; the first thrust disc groove 21 and the second thrust disc groove 22 are oppositely arranged at two ends of the thrust disc 63, and the two axial limiting parts 64 are respectively fixed on the first thrust disc groove 21 and the second thrust disc groove 22.

Cooling air enters through the air inlet of the air inlet end cover 8, so that the cooling air quantity of the motor rotor 10 and the cooling air quantity of the motor stator 102 are relatively even, and the phenomenon of air robbing is prevented; the heat generated by the rear end air suspension radial bearing 61 is transferred to the second end cover 3 in a heat conduction mode and then taken away through gas cooling; the heat of the motor stator 102 is transferred to the motor inner cylinder 101 in a heat conduction mode and then is taken away by the gas cooling of the third channel 13; the heat of the motor rotor 10 is taken away by the gas cooling of the fourth channel 14; the heat generated by the air bearing 62 and the front end air bearing 61 is transferred to the first end cap 2 by means of heat conduction and then removed by gas cooling.