An automatic centering bearing chamber for the rotating shaft of an air suspension blower and its usage method

Abstract

The present invention belongs to the field of air suspension blowers, and particularly relates to an automatic centering bearing chamber for the rotating shaft of an air suspension blower and its usage method; this device includes: a limit flange, a flat foil, a corrugated foil, an insulating plate, a washer, a bearing chamber body, a displacement sensor, a power-on wire, and a controller. The washer includes an electroactive polymer, the washer is attached to the inner wall of the bearing chamber body, the insulating plate is arranged between the electroactive polymers, one end of the power-on wire is connected to the electroactive polymer, and the other end is connected to the controller. The corrugated foil is attached to the inner wall of the electroactive polymer, the flat foil is attached to the inner wall of the corrugated foil, the limit flange is fixedly connected to the front end face of the bearing chamber body, and the displacement sensor is installed in the sensor installation hole and is in signal connection with the controller; compared with the prior art, the present invention has the advantage that the rotating shaft can be automatically centered when the air suspension blower is working.

Description

Technical Field

[0001] The present invention belongs to the field of air suspension blowers, and particularly relates to an automatic centering bearing chamber for the rotating shaft of an air suspension blower and a using method thereof. Background Art

[0002] Blowers have developed from Roots blowers in the first stage to multi-stage blowers in the second stage, then to single-stage blowers in the third stage, then to magnetic suspension blowers in the fourth stage, and finally to the current air suspension blowers. Air suspension blowers are widely used in the blast aeration of environmental protection sewage treatment systems, the production gas of the food and drug industries, the petrochemical industry, the mechanical and electronic industries, the power generation desulfurization, denitrification, stripping, and pulverized coal material transportation, the cement building materials production material transportation, the compressed gas used in steelmaking and metallurgy production, the compressed gas used in textile and dyeing production, the compressed gas for large ships, and the gas used in other industries such as painting and pneumatic tools. Compared with traditional Roots blowers, air suspension blowers have an energy-saving efficiency improvement of 30-50%, low noise, and small volume.

[0003] Patent CN211737782U forms a more durable bearing chamber by installing washers outside the corrugated foil, reserving space for the thermal expansion and deformation of the corrugated foil, and reducing the wear of the corrugated foil due to extrusion. However, due to the radial offset generated during the operation of the rotating shaft, the thermal deformation of the corrugated foils in all directions is inconsistent, and the material utilization rate is not high. Patent CN214465072U designs a bearing seat, which is installed at the front shaft of the air suspension blower, can automatically inject lubricating oil, and is provided with double shock absorption to prevent excessive component loss. However, the rotating shaft still cannot avoid physical collision and will still cause relatively large wear. In summary, in the prior art, the most fundamental problem is that the axis of the rotating shaft is unstable during operation and the centering performance is poor, and this problem has not been improved. Currently, there is no suitable structure for the real-time automatic centering of the rotating shaft of an air suspension blower. Summary of the Invention

[0004] The present invention aims at the problems existing above, and specifically designs an automatic centering bearing chamber for the rotating shaft of an air suspension blower and a using method thereof. Through the air dynamic pressure principle, non-contact centering of the rotating shaft is achieved, the wear of the rotating shaft is small, and electroactive polymers are arranged inside the washer to improve the service life.

[0005] To achieve the above object, the present invention provides an automatic centering bearing chamber for the rotating shaft of an air suspension blower and a using method thereof, including: a limit flange, a flat foil, a corrugated foil, an insulating plate, a washer, a bearing chamber body, a displacement sensor, a power-on wire, and a controller. The washer is a multi-segment circular structure and is internally provided with a layer of electroactive polymer. The outer circle of the washer is provided with power-on holes. The inner wall at the front end of the bearing chamber body is uniformly provided with a plurality of grooves, and the outer wall at the rear end is provided with a through wire through hole and a sensor mounting hole.

[0006] The washer is fitted and installed on the inner wall of the bearing chamber body. The insulating plate is arranged between the electroactive polymers and is clamped in the groove. One end of the energized wire is connected to the electroactive polymer through the energizing hole, and the other end is connected to the controller through the wire through-hole. The corrugated foil is placed in the cavity of the washer and fits against the inner wall of the electroactive polymer. The flat foil fits against the inner wall of the corrugated foil. The limiting flange is fixedly connected to the front end face of the bearing chamber body. The displacement sensor is installed in the sensor installation hole and is signal-connected to the controller. The washer is multi-segmented, and different numbers of segments of the washer can be selected according to requirements to achieve different precisions of shaft adjustment. The insulating plate between adjacent electroactive polymers is used to prevent current intercommunication.

[0007] Further, the number of the wire through-holes, sensor installation holes, displacement sensors, grooves and insulating plates is the same as the number of the electroactive polymers. The accessories need to be matched with the number of the electroactive polymers to achieve tight assembly requirements and accurate measurement results.

[0008] Further, the positions where the wire through-holes and sensor installation holes are opened correspond to the installation positions of the electroactive polymers. The wire through-holes can bundle the energized wires, and the sensor installation holes can fix the displacement sensors directly above the electroactive polymers.

[0009] Further, the limiting flange is provided with counterbores. Every two counterbores form a group. The number of groups of the counterbores is the same as the number of segments of the electroactive polymers and the positions correspond. Each electroactive polymer is correspondingly equipped with two counterbores to make the assembly more compact after assembly.

[0010] Further, threaded holes are provided on the front end face of the bearing chamber body. The number and positions of the threaded holes are both matched with the counterbores.

[0011] Step 1: Preset the rated radial offset of the shaft in the controller, and real-time monitor the radial offset of the shaft through the displacement sensor;

[0012] Step 2: The displacement sensor transmits the position signal of the shaft to the controller;

[0013] Step 3: After the controller receives the signal of the shaft deflection and the signal exceeds the rated value, it energizes the electroactive polymer at the corresponding position through the energized wire. Here, the electroactive polymer expands and inwardly presses the flat foil, increasing the air pressure in the direction of the depression of the flat foil, and the shaft displaces in the opposite direction;

[0014] Step 4: After the shaft is corrected, when the controller receives a signal that does not exceed the rated value, it stops supplying power to the energized wire, and the electroactive polymer returns to its original thickness.

[0015] In summary, an automatic centering bearing chamber for the rotating shaft of an air suspension blower according to the present invention and its usage method have the following advantages and beneficial technical effects:

[0016] 1. By arranging a plurality of sensors in the circumferential direction of the bearing chamber body, the automatic centering bearing chamber for the rotating shaft of the air suspension blower according to the present invention can monitor the radial offset of the rotating shaft in different directions in real time, with high measurement accuracy;

[0017] 2. The automatic centering bearing chamber for the rotating shaft of the air suspension blower according to the present invention adopts the principle of air dynamic pressure to correct the centering deviation of the rotating shaft in a non-contact manner, with little wear on the rotating shaft;

[0018] 3. The electroactive polymer of the automatic centering bearing chamber for the rotating shaft of the air suspension blower according to the present invention is arranged inside the washer, preventing contact with the corrugated foil and the bearing chamber body, and improving the overall service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0020] Figure 1 is an exploded view of an automatic centering bearing chamber for the rotating shaft of an air suspension blower according to the present invention;

[0021] Figure 2 is a front isometric view of an automatic centering bearing chamber for the rotating shaft of an air suspension blower according to the present invention;

[0022] Figure 3 is a rear isometric view of an automatic centering bearing chamber for the rotating shaft of an air suspension blower according to the present invention.

[0023] The reference numerals in the drawings are:

[0024] 1 - limit flange, 11 - counterbore; 2 - flat foil; 3 - corrugated foil; 4 - insulating plate, 41 - limit projection;

[0025] 5 - washer, 51 - cavity, 52 - electroactive polymer, 53 - power supply hole;

[0026] 6 - bearing chamber body, 61 - groove, 62 - threaded hole, 63 - wire through hole, 64 - sensor mounting hole;

[0027] 7 - displacement sensor; 8 - power supply wire; 9 - controller; 10 - bolt. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] To make the objectives, technical solutions, and advantages of the present invention more clear, the following will describe the technical solutions in the embodiments of the present invention in more detail with reference to the accompanying drawings in the embodiments of the present invention. In the drawings, the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end; the described embodiments are part of the embodiments of the present invention, rather than all embodiments; the embodiments described below with reference to the accompanying drawings and directional terms are all exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention; based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. The following will describe the embodiments of the present invention in detail with reference to the accompanying drawings:

[0029]

Embodiment 1

[0030] As Figure 1 、 Figure 2 and Figure 3 shown, it includes a limit flange 1, a flat foil 2, a corrugated foil 3, an insulating plate 4, a washer 5, a bearing housing body 6, a displacement sensor 7, a power-on wire 8, and a controller 9; four grooves 61 are opened inside the bearing housing body 6;

[0031] The washer 5 is a multi-segment circular structure, with electroactive polymer 52 sandwiched inside. Power-on holes 35 are opened on all four washers 5, and the power-on wire 8 is connected to the internal electroactive polymer 52 through the power-on holes 35. The four insulating plates 4 are inserted into the grooves 61 inside the bearing housing body 6, and the limit protrusions 41 are engaged with the grooves 61. Then, the washer 5 is inserted between the insulating plates 4, and the power-on wire 8 is connected to the external controller 9 through the wire through-hole 63 on the bearing housing body 6;

[0032] The outer ring of the corrugated foil 3 is placed against the inner wall of the washer 5, and the outer ring of the flat foil 2 is placed against the inner wall of the corrugated foil 3; the limit flange 1 is fixedly connected to the bearing housing body 6 through bolts 10.

[0033] Preferably, the number of counterbores 11 on the limit flange 1 is twice the number of segments of the washer 5, and the positions where the counterbores 11 are opened match the positions where each segment of the washer 5 is installed. At the same time, threaded holes 62 with the same positions and numbers are opened on the front end face of the bearing housing body 6.

[0034] On the periphery at the rear end of the bearing housing body 6, sensor mounting holes 64 with the same number as the number of segments of the washer 5 are opened, and the same number of displacement sensors 7 are installed in the sensor mounting holes 64. The displacement sensors 7 are signal-connected to the controller 9.

[0035]

Embodiment 2

[0036] Embodiment 2 discloses a method for using an air suspension blower shaft automatic centering bearing chamber, including the following steps:

[0037] Step 1: Preset the rated radial offset of the shaft in the controller 9, and monitor the radial offset of the shaft in real time through the displacement sensor 7;

[0038] Step 2: The displacement sensor 7 transmits the position signal of the shaft to the controller 9;

[0039] Step 3: After the controller 9 receives the signal of the shaft deflection, when the radial offset of the shaft exceeds the rated value, the controller 9 energizes the electroactive polymer 52 at the corresponding position through the energized wire 8. The electroactive polymer 52 expands when energized and presses inward, causing the flat foil 2 to dent inward, thereby changing the air dynamic pressure distribution in the bearing chamber, increasing the air pressure in the direction of the dent of the flat foil 2, and causing the shaft to displace in the opposite direction under force;

[0040] Step 4: After the shaft is corrected, the sensor 7 transmits the signal to the controller 9. After the controller 9 determines that the value does not exceed the rated value, it stops supplying power to the electroactive polymer 52, and the electroactive polymer 52 returns to its original thickness.

[0041] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described 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 and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An automatic centering bearing chamber for the rotating shaft of an air suspension blower, characterized in that: It includes a limit flange (1), a flat foil (2), a corrugated foil (3), an insulating plate (4), a washer (5), a bearing chamber body (6), a displacement sensor (7), a live wire (8) and a controller (9). The washer (5) is of a multi-segment circular structure and is internally provided with a layer of electroactive polymer (52). An energizing hole (53) is provided on the outer ring of the washer (5). A number of grooves (61) are evenly distributed and opened on the inner wall at the front end of the bearing chamber body (6), and a through wire through hole (63) and a sensor mounting hole (64) are opened on the outer wall at the rear end. The washer (5) is fitted and installed on the inner wall of the bearing chamber body (6). The insulating plate (4) is arranged between the electroactive polymers (52) and is clamped in the grooves (61). One end of the live wire (8) is connected to the electroactive polymer (52) through the energizing hole (53), and the other end is connected to the controller (9) through the wire through hole (63). The corrugated foil (3) is placed in the cavity (51) of the washer (5) and is in contact with the inner wall of the electroactive polymer (52). The flat foil (2) is in contact with the inner wall of the corrugated foil (3). The limit flange (1) is fixedly connected to the front end face of the bearing chamber body (6). The displacement sensor (7) is installed in the sensor mounting hole (64) and is in signal connection with the controller (9).

2. The automatic centering bearing housing for the rotating shaft of an air suspension blower according to claim 1, characterized in that: The number of the wire through hole (63), the sensor mounting hole (64), the displacement sensor (7), the grooves (61) and the insulating plate (4) is the same as that of the electroactive polymers (52).

3. The automatic centering bearing housing for the rotating shaft of an air suspension blower according to claim 2, characterized in that: The positions where the wire through hole (63) and the sensor mounting hole (64) are opened correspond to the installation positions of the electroactive polymers (52).

4. An automatic centering bearing chamber for the rotating shaft of an air suspension blower according to claim 1, characterized in that: A counterbore (11) is provided on the limit flange (1). Every two of the counterbores (11) form a group. The number of groups of the counterbores (11) is the same as the number of segments of the electroactive polymers (52) and the positions correspond to each other.

5. An automatic centering bearing chamber for the rotating shaft of an air suspension blower according to claim 4, characterized in that: Threaded holes (62) are provided on the front end face of the bearing chamber body (6). The number and positions of the threaded holes (62) match those of the counterbores (11).

6. The automatic centering bearing housing for the rotating shaft of an air suspension blower according to claim 1, characterized in that: Limit protrusions (41) are provided on the insulating plate (4). The limit protrusions (41) are arranged at one end of the insulating plate (4) inserted into the grooves (61), and the limit protrusions (41) are clamped with the grooves (61).

7. A method for using an automatic centering bearing chamber of an air suspension blower shaft according to any one of claims 1-6, characterized in that, It includes the following steps: Step 1: Preset the rated radial offset of the rotating shaft in the controller (9), and real-time monitor the radial offset of the rotating shaft through the displacement sensor (7). Step 2: The displacement sensor (7) transmits the position signal of the rotating shaft to the controller (9). Step 3: After the controller (9) receives the signal of the rotation of the rotating shaft and exceeds the rated value, it energizes the electroactive polymer (52) at the corresponding position through the live wire (8). Here, the electroactive polymer (52) expands and inwardly presses the flat foil (2), increasing the air pressure in the depression direction of the flat foil (2), and the rotating shaft is displaced in the opposite direction. Step 4: After the rotation axis is corrected, after the controller (9) receives a signal that does not exceed the rated value, the power supply to the energized wire (8) is stopped, and the electroactive polymer (52) returns to its original thickness.

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