Air suspension blower with early warning function and early warning method

Abstract

The invention relates to an air suspension blower with an early warning function and an early warning method, and belongs to the technical field of early warning of air suspension blowers. The air suspension blower comprises a host, a data acquisition and processing module, an early warning module, a main controller and a frequency converter; in the host, a detection part is also mounted at the right end of the rotor and is used for detecting the displacement of the rotor; the data acquisition and processing module is used for acquiring axial and radial displacement signals of the detection part, processing and converting the displacement signals and then transmitting the displacement signals to the main controller; the main controller is used for sending an early warning instruction to the early warning module based on the received axial and radial displacement signals and controlling the frequency of the frequency converter; and the early warning module is used for performing early warning according to the early warning instruction sent by the main controller. According to the air blower and the early warning method, the displacement of the rotor can be detected and early warned, equipment is correspondingly monitored and early warned in advance, the rotor can be prevented from being seriously damaged, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to an air suspension blower with early warning function and an early warning method, belonging to the technical field of early warning of air suspension blowers. Background Art

[0002] The basic structure of an air-suspended high-speed fan includes an impeller, a volute, a high-speed motor stator, a rotor, a radial air-suspended bearing, an axial air-suspended bearing, etc.; the motor has radial air-suspended bearings at both ends to provide radial support for the motor rotor; the axial air-suspended bearing generates an axial force on the motor rotor to provide axial positioning and prevent axial movement.

[0003] At present, the automation level of air suspension blowers is low, and there is a lack of necessary monitoring and early warning measures for the operating status of the rotor in the air suspension blower. As a result, when a fault in the air suspension blower is discovered, the volute, impeller, axial air suspension bearing, radial air suspension bearing, thrust plate and other components of the air suspension blower are often severely damaged, affecting the normal use of the air suspension blower and causing great property losses to customers.

[0004] Therefore, there is an urgent need for an air suspension blower capable of early warning and an early warning method. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides an air suspension blower with an early warning function, which determines the operating state of the rotor by detecting the axial displacement and radial displacement of the rotor. When the displacement exceeds the set value, an early warning is issued to protect the air suspension blower.

[0006] At the same time, the present invention also provides an early warning method for an air suspension blower with an early warning function.

[0007] The technical solution of the present invention is: On the one hand, the present invention provides an air suspension blower with an early warning function, comprising a host, a data acquisition and processing module, an early warning module, a main controller and a frequency converter; The main engine includes a casing, a rotor and a stator. The rotor and the stator are installed in the casing, and the stator is mounted on the outside of the rotor. Radial air suspension bearings are provided between the rotor and the front and rear ends of the casing. The left end of the rotor is provided with a first impeller, and the right end of the rotor is provided with a heat dissipation impeller; and the right end of the rotor is also provided with a detection unit, which is located on the right side of the heat dissipation impeller, and detects the axial displacement and radial displacement of the rotor through the detection unit; An axial air suspension bearing is also provided between the first impeller and the radial air suspension bearing at the front end of the casing; The data acquisition and processing module is used to collect the axial displacement signal and radial displacement signal of the detection part, process and convert the displacement signal, and then transmit it to the main controller; The main controller is used to send a warning instruction to the warning module and control the frequency of the inverter based on the received axial displacement signal and radial displacement signal; The early warning module is used to issue early warning according to the early warning instruction issued by the main controller.

[0008] Preferably, according to the present invention, the rotor includes a permanent magnetic core, a shaft head and a pull rod, and shaft heads are provided at both ends of the permanent magnetic core; one end of the pull rod on the left passes through the shaft head and is threadedly connected to the permanent magnetic core, and the other end of the pull rod on the left passes through the first impeller, and the outer side of the first impeller is fixed to the pull rod by a nut; an axial adjustment impeller is provided between the shaft head on the left and the permanent magnetic core, for balancing the axial force acting on the rotor; One end of the right pull rod passes through the shaft head and is threadedly connected to the permanent magnet core body, and the other end of the right pull rod passes through the heat dissipation impeller, and the outer side of the heat dissipation impeller is fixed to the pull rod through a nut.

[0009] Preferably, according to the present invention, the axially-adjustable impeller and the first impeller are installed in the same direction, and the heat dissipation impeller and the axially-adjustable impeller are installed in opposite directions.

[0010] Preferably, according to the present invention, the detection part is a cylinder, one end of the detection part has an external thread, the tightening direction of the external thread is opposite to the rotation direction of the rotor, and the detection part is connected to the internal thread of the right pull rod through the external thread.

[0011] Preferably, according to the present invention, the data acquisition and processing module includes a radial displacement sensor, an axial displacement sensor, a temperature sensor, a signal conditioning circuit and an analog-to-digital converter; the output ends of the radial displacement sensor, the axial displacement sensor and the temperature sensor are connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the analog-to-digital converter; Four radial displacement sensors are arranged around the detection part, and the four radial displacement sensors are distributed in the positive and negative directions of the X-axis and the Y-axis. An axial displacement sensor and a temperature sensor are arranged on the right side of the detection part. The signal conditioning circuit is used to amplify, filter and bias the detection signals of the radial displacement sensor, the axial displacement sensor and the temperature sensor; the analog-to-digital converter is used to convert the analog signal output by the signal conditioning circuit into a digital signal.

[0012] Preferably according to the present invention, the air suspension blower also includes a radial displacement sensor seat and an axial displacement sensor seat, the radial displacement sensor seat is mounted on the outside of the detection portion, and the radial displacement sensor is installed in the radial displacement sensor seat and is evenly distributed around the rotor; the axial displacement sensor seat is fixed to the right end of the main engine, and the axial displacement sensor and the temperature sensor are both fixed on the axial displacement sensor seat, the axial displacement sensor is installed coaxially with the rotor, and the temperature sensor is arranged on one side of the axial displacement sensor.

[0013] Preferably, according to the present invention, the early warning module includes an indicator light and a buzzer. According to the early warning instruction of the main controller, the indicator light is lit and the buzzer is started to generate a light alarm.

[0014] On the other hand, the present invention also provides an early warning method for the above-mentioned air suspension blower with early warning function, comprising: Calibrate the radial displacement sensor and the axial displacement sensor respectively; Collect the displacement X of the rotor in the X-axis direction, the displacement Y of the rotor in the Y-axis direction, and the displacement Z of the rotor in the Z-axis direction, and obtain the displacement offset △X of the rotor in the X-axis direction, the displacement offset △Y of the rotor in the Y-axis direction, and the displacement offset △Z of the rotor in the Z-axis direction; When the displacement offset △X of the rotor in the X-axis direction or the displacement offset △Y of the rotor in the Y-axis direction or the displacement offset △Z of the rotor in the Z-axis direction exceeds the set value, the main controller sends a warning signal to the warning module and controls the inverter to perform a shutdown operation.

[0015] Preferably, according to the present invention, the calibration process of the radial displacement sensor and the axial displacement sensor is: When the rotor in the host is not floating, only the force is applied to the negative / positive direction of the X-axis of the rotor, so that the radial air suspension bearing reaches the maximum movable displacement of X1 / X2 in the negative / positive direction of the X-axis, and the output value of the corresponding displacement sensor module is calibrated to A1 / A2, then the radial displacement output range in the X-axis direction is [A1, A2]; when the rotor is in the middle of the maximum movable displacement in the X-axis direction, the output value of the radial displacement sensor in the X-axis direction is calibrated to (A1+A2) / 2; It should be noted that the maximum recoverable deformation on the X-axis, Y-axis or Z-axis may vary with the design parameters of the radial air suspension bearing or the axial air suspension bearing.

[0016] In the case where the rotor in the main machine has not been levitated, a force is applied only in the negative / positive Y-axis direction of the rotor, so that the radial air suspension bearing reaches the maximum movable displacement in the negative / positive Y-axis direction of Y1 / Y2, and the output values of the corresponding displacement sensor module are calibrated as B1 / B2. Then, the radial displacement output range in the Y-axis direction is [B1, B2]; when the rotor is at the middle of the maximum movable displacement in the Y-axis direction, the output value of the radial displacement sensor in the Y-axis direction is calibrated as (B1 + B2) / 2; In the case where the rotor in the main machine has not been levitated, a force is applied only in the negative / positive Z-axis direction of the rotor, so that the axial air suspension bearing reaches the maximum movable displacement in the negative / positive Z-axis direction of Z1 / Z2, and the output values of the corresponding displacement sensor module are calibrated as C1 / C2. Then, the displacement signal output range in the Z-axis direction is [C1, C2]; when the rotor is at the middle of the maximum movable displacement in the Z-axis direction, the output value of the axial displacement sensor in the Z-axis direction is calibrated as (C1 + C2) / 2.

[0017] Preferably according to the present invention, the displacement offset is the distance between the rotor and the middle position of the maximum movable displacement; the displacement offset △X of the rotor in the X-axis direction = 丨X - (X1 + X2) / 2丨; The displacement offset △Y of the rotor in the Y-axis direction = 丨Y - (Y1 + Y2) / 2丨; The displacement offset △Z of the rotor in the Z-axis direction = 丨Z - (Z1 + Z2) / 2丨; The set value A of the displacement offset △X of the rotor in the X-axis direction is (X2 - X1 + 2aM) / 2; M is the maximum recoverable deformation of the radial air suspension bearing in the x-axis direction; a is the safety factor of the radial air suspension bearing in the X-axis direction; The set value B of the displacement offset △Y of the rotor in the Y-axis direction is (Y2 - Y1 + 2bN) / 2; N is the maximum recoverable deformation of the radial air suspension bearing in the y-axis direction; b is the safety factor of the radial air suspension bearing in the Y-axis direction; The set value C of the displacement offset △Z of the rotor in the Z-axis direction is (Z2 - Z1 + 2cQ) / 2; Q is the maximum recoverable deformation of the axial air suspension bearing in the z-axis direction, and c is the safety factor of the axial air suspension bearing in the Z-axis direction. a and b are determined according to the deformation tolerance of the foil in the radial air suspension bearing, and c is determined according to the deformation tolerance of the wave foil in the axial air suspension bearing.

[0018] Preferably according to the present invention, the main controller sends a warning signal to the warning module and controls the frequency converter to perform a shutdown operation, including: Turn on the indicator light and start the buzzer for optical and audible alarm; at the same time, reduce the frequency of the frequency converter, and the air suspension blower gradually stops running.

[0019] The beneficial effects of the present invention are: 1. The present invention provides an air suspension blower with an early warning function, comprising a host, a data acquisition and processing module, an early warning module, a main controller and a frequency converter. By collecting, processing, early warning and controlling data on the axial and radial displacements of the rotor, real-time monitoring and early warning of the displacement and state of the rotor can be achieved; through real-time monitoring, potential faults and abnormalities can be discovered early, the service life of the equipment can be extended, and maintenance costs can be reduced.

[0020] 2. The present invention provides an early warning method for an air suspension blower with an early warning function, describes in detail the processing strategies for different displacement offsets, and can be accurately adjusted according to actual operating conditions to ensure the operation of the air suspension blower.

[0021] 3. The present invention arranges an axial adjustment impeller and a heat dissipation impeller on the rotor, which can effectively balance the axial force exerted on the rotor and improve the stability and efficiency of the system.

[0022] 4. A detection part is set at one end of the rotor, and an axial displacement sensor and a radial displacement sensor are set. By detecting the axial and radial displacements of the detection part, potential faults and abnormalities can be discovered early, which facilitates the adoption of protective measures and prolongs the service life and maintenance cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A schematic structural diagram of a main engine of an air suspension blower with early warning function provided by the present invention.

[0024] Figure 2 A schematic diagram of the partial structure of a main engine of an air suspension blower with early warning function provided by the present invention.

[0025] Figure 3 A schematic structural diagram of an air suspension blower with early warning function provided by the present invention.

[0026] 1. Rotor, 2. Stator, 3. Casing, 4. First impeller, 5. Heat dissipation impeller, 6. Radial displacement sensor, 7. Radial displacement sensor seat, 8. Temperature sensor, 9. Axial displacement sensor, 10. Axial displacement sensor seat, 11. Detection unit, 12. Permanent magnetic core, 13. Axial adjustment impeller, 14. Shaft head, 15. Pull rod, 16. Radial air suspension bearing, 17. Axial air suspension bearing, 18. Host, 19. Data acquisition and processing module, 20. Main controller, 21. Frequency converter, 22. Early warning module. DETAILED DESCRIPTION

[0027] Several embodiments of the present application will be disclosed below with diagrams to clearly and completely describe the technical solution of the present application, which constitute a part of the specification of the present application and are used to provide a further understanding of the present invention. The schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation on the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0028] It should be noted that unless a direction is defined separately, the directions such as up, down, left, and right mentioned in this document are based on the embodiments of this application. Figure 1 The directions of up, down, left, right, etc. shown in the figure shall prevail. If the specific posture changes, the directional indication will also change accordingly. The words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different components. In addition, in various embodiments of the present disclosure, the same or similar reference numerals represent the same or similar components.

[0029] In the present invention, unless otherwise clearly defined and specified, the terms "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral body, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] Example 1 This embodiment provides an air suspension blower with an early warning function, such as Figure 1 , Figure 2 and Figure 3 As shown, it includes a host 18, a data acquisition and processing module 19, an early warning module 22, a main controller 20 and a frequency converter 21; The main engine 18 includes a housing 3, a rotor 1 and a stator 2. The rotor 1 and the stator 2 are installed in the housing 3, and the stator 2 is mounted on the outside of the rotor 1. Radial air suspension bearings 16 are provided between the rotor 1 and the front and rear ends of the housing 3. The left end of the rotor 1 is provided with a first impeller 4, and the right end of the rotor 1 is provided with a heat dissipation impeller 5; and the right end of the rotor 1 is also provided with a detection unit 11, which is located on the right side of the heat dissipation impeller 5, and detects the axial displacement and radial displacement of the rotor 1 through the detection unit 11; An axial air suspension bearing 17 is also provided between the first impeller 4 and the radial air suspension bearing 16 at the front end of the casing 3; The data acquisition and processing module 19 is used to acquire the axial displacement signal and the radial displacement signal of the detection part 11, and process and convert the displacement signal, and then transmit it to the main controller 20; The main controller 20 is used to send a warning instruction to the warning module 22 and control the frequency of the frequency converter 21 based on the received axial displacement signal and radial displacement signal; The warning module 22 is used to issue a warning according to the warning instruction issued by the main controller 20.

[0032] Example 2 This embodiment provides an air suspension blower with an early warning function, such as Figure 1 and Figure 2 As shown, the difference from Example 1 is that: like Figure 1 and Figure 2 As shown, the rotor 1 includes a permanent magnetic core 12, a shaft head 14 and a pull rod 15, and the shaft heads 14 are arranged at both ends of the permanent magnetic core 12; one end of the left pull rod 15 passes through the shaft head 14 and is threadedly connected to the permanent magnetic core 12, and the other end of the left pull rod 15 passes through the first impeller 4, and the outer side of the first impeller 4 is fixed to the pull rod 15 by a nut; an axial adjustment impeller 13 is arranged between the left shaft head 14 and the permanent magnetic core 12, which is used to balance the axial force on the rotor 1; One end of the right tie rod 15 passes through the shaft head 14 and is threadedly connected to the permanent magnet core 12 , and the other end of the right tie rod 15 passes through the heat dissipation impeller 5 , and the outer side of the heat dissipation impeller 5 is fixed to the tie rod 15 by a nut.

[0033] Example 3 This embodiment provides an air suspension blower with an early warning function, such as Figure 1 and Figure 2 As shown, the difference from Example 2 is that: The axially adjustable impeller 13 is installed in the same direction as the first impeller 4, while the heat dissipation impeller 5 is installed in the opposite direction to the axially adjustable impeller 13. The axial pressure generated by the first impeller 4 is opposite to the axial pressure generated by the heat dissipation impeller 5. The axially adjustable impeller 13 is installed in the same direction as the first impeller 4, while the heat dissipation impeller 5 is installed in the opposite direction to the axially adjustable impeller 13, so that the axial force generated by the axially adjustable impeller 13 is consistent with the axial force of the heat dissipation impeller 5, and the axial resultant force generated by the first impeller 4 and the heat dissipation impeller 5 can be balanced.

[0034] Example 4 This embodiment provides an air suspension blower with an early warning function, such as Figure 1 and Figure 2 As shown, the difference from Example 2 is that: The detection part 11 is a cylinder, and one end of the detection part 11 has an external thread. The tightening direction of the external thread is opposite to the rotation direction of the rotor 1. The detection part 11 is connected to the internal thread of the right pull rod 15 through the external thread.

[0035] In the pull rod type rotor 1 structure, the tail of the pull rod 15 is provided with threads, which will affect the accuracy of the detection result. The detection part 11 is provided to facilitate accurate detection of the axial and radial displacements of the rotor 1 .

[0036] Example 5 This embodiment provides an air suspension blower with an early warning function, such as Figure 1 and Figure 2 As shown, the difference from Example 1 is that: The data acquisition and processing module 19 includes a radial displacement sensor 6, an axial displacement sensor 9, a temperature sensor 8, a signal conditioning circuit and an analog-to-digital converter; the output ends of the radial displacement sensor 6, the axial displacement sensor 9 and the temperature sensor 8 are connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the analog-to-digital converter; Four radial displacement sensors 6 are arranged around the detection part 11, and the four radial displacement sensors 6 are distributed in the positive and negative directions of the X-axis and the Y-axis. An axial displacement sensor 9 and a temperature sensor 8 are arranged on the right side of the detection part 11. The signal conditioning circuit is used to amplify, filter and bias the detection signals of the radial displacement sensor 6, the axial displacement sensor 9 and the temperature sensor 8; the analog-to-digital converter is used to convert the analog signal output by the signal conditioning circuit into a digital signal.

[0037] Example 6 This embodiment provides an air suspension blower with an early warning function, such as Figure 1 and Figure 2 As shown, the difference from Example 5 is that: The air suspension blower also includes a radial displacement sensor seat 7 and an axial displacement sensor seat 10. The radial displacement sensor seat 7 is mounted on the outside of the detection part 11, and the radial displacement sensor 6 is installed in the radial displacement sensor seat 7 and evenly distributed around the rotor 1; the axial displacement sensor seat 10 is fixed to the right end of the main engine 18, and the axial displacement sensor 9 and the temperature sensor 8 are both fixed on the axial displacement sensor seat 10. The axial displacement sensor 9 is installed coaxially with the rotor 1, and the temperature sensor 8 is arranged on one side of the axial displacement sensor 9.

[0038] The axial displacement sensor 9 is used to detect the axial position of the rotor 1, and the temperature sensor 8 is used to detect the working temperature of the blower, so as to obtain the correction coefficient of the axial displacement sensor 9 at different temperatures.

[0039] The early warning module 22 includes an indicator light and a buzzer. According to the early warning instruction of the main controller 20, the indicator light is turned on and the buzzer is started to generate a light alarm.

[0040] Example 7 This embodiment further provides an early warning method for an air suspension blower with early warning function provided in any one of the above embodiments 1-6, including: Calibrate the radial displacement sensor 6 and the axial displacement sensor 9 respectively; Collect the displacement X of rotor 1 in the X-axis direction, the displacement Y of rotor 1 in the Y-axis direction, and the displacement Z of rotor 1 in the Z-axis direction to obtain the displacement offset △X of rotor 1 in the X-axis direction, the displacement offset △Y of rotor 1 in the Y-axis direction, and the displacement offset △Z of rotor 1 in the Z-axis direction; then processing is required, mainly including signal amplification, filtering, and bias processing of the displacement signal. Filtering is mainly to remove noise and interference in the signal to ensure the purity and reliability of the signal. Bias processing is usually used to ensure that the signal is within the effective input range of the analog-to-digital converter (ADC). Conversion is to convert the analog signal of displacement into a digital signal of displacement; When the displacement offset △X of the rotor 1 in the X-axis direction, the displacement offset △Y of the rotor 1 in the Y-axis direction, or the displacement offset △Z of the rotor 1 in the Z-axis direction exceeds the set value, the main controller 20 sends a warning signal to the warning module 22 and controls the inverter 21 to perform a shutdown operation.

[0041] Example 8 This embodiment provides an early warning method for an air suspension blower with an early warning function, which is different from Embodiment 7 in that: The calibration process of the radial displacement sensor 6 and the axial displacement sensor 9 is as follows: When the rotor 1 in the main unit 18 is not levitated, a force is applied only in the negative / positive X-axis direction of the rotor 1, so that the radial air suspension bearing 16 reaches the maximum movable displacement in the negative / positive X-axis direction, which is X1 / X2. Calibrate the output values of the corresponding displacement sensor module as A1 / A2. Then the radial displacement output range in the X-axis direction is [A1, A2]. When the rotor 1 is at the middle of the maximum movable displacement in the X-axis direction, calibrate the output value of the radial displacement sensor 6 in the X-axis direction as (A1 + A2) / 2; It should be noted that the maximum recoverable deformation in the X-axis, Y-axis or Z-axis will vary depending on the design parameters of the radial air suspension bearing 16 or the axial air suspension bearing 17.

[0042] When the rotor 1 in the main unit 18 is not levitated, a force is applied only in the negative / positive Y-axis direction of the rotor 1, so that the radial air suspension bearing 16 reaches the maximum movable displacement in the negative / positive Y-axis direction, which is Y1 / Y2. Calibrate the output values of the corresponding displacement sensor module as B1 / B2. Then the radial displacement output range in the Y-axis direction is [B1, B2]. When the rotor 1 is at the middle of the maximum movable displacement in the Y-axis direction, calibrate the output value of the radial displacement sensor 6 in the Y-axis direction as (B1 + B2) / 2; When the rotor 1 in the main unit 18 is not levitated, a force is applied only in the negative / positive Z-axis direction of the rotor 1, so that the axial air suspension bearing 17 reaches the maximum movable displacement in the negative / positive Z-axis direction, which is Z1 / Z2. Calibrate the output values of the corresponding displacement sensor module as C1 / C2. Then the displacement signal output range in the Z-axis direction is [C1, C2]. When the rotor 1 is at the middle of the maximum movable displacement in the Z-axis direction, calibrate the output value of the axial displacement sensor 9 in the Z-axis direction as (C1 + C2) / 2.

[0043] Embodiment 9 This embodiment provides an early warning method for an air suspension blower with an early warning function, which is different from Embodiment 8 in that: The displacement offset is the distance between the rotor 1 and the middle position of the maximum movable displacement; the displacement offset △X of the rotor 1 in the X-axis direction = 丨X - (X1 + X2) / 2丨; The displacement offset △Y of the rotor 1 in the Y-axis direction = 丨Y - (Y1 + Y2) / 2丨; The displacement offset △Z of the rotor 1 in the Z-axis direction = 丨Z - (Z1 + Z2) / 2丨; The set value A of the displacement offset △X of the rotor 1 in the X-axis direction is (X2 - X1 + 2aM) / 2; M is the maximum recoverable deformation of the radial air suspension bearing 16 in the x-axis direction; a is the safety factor of the radial air suspension bearing 16 in the X-axis direction; The setting value B of the displacement offset △Y of the rotor 1 in the Y-axis direction is (Y2-Y1+2bN) / 2; N is the maximum recoverable deformation of the radial air suspension bearing 16 in the y-axis direction; b is the safety factor of the radial air suspension bearing 16 in the Y-axis direction; The set value C of the displacement offset ΔZ of the rotor 1 in the Z-axis direction is (Z2-Z1+2cQ) / 2; Q is the maximum recoverable deformation of the axial air suspension bearing 17 in the z-axis direction, and c is the safety factor of the axial air suspension bearing 17 in the Z-axis direction. M and N are determined by the performance of the radial air suspension bearing 16, and Q is determined by the performance of the axial air suspension bearing 17. M, N and Q can be obtained through testing or simulation analysis; a and b are determined according to the limit of the deformation that the foil in the radial air suspension bearing 16 can bear, and can be determined based on experience; c is determined according to the limit of the deformation that the wave foil in the axial air suspension bearing 17 can bear, and can be determined based on experience.

[0044] Example 10 This embodiment provides an early warning method for an air suspension blower with an early warning function, which is different from Embodiment 9 in that: The main controller 20 sends a warning signal to the warning module 22 and controls the inverter 21 to perform a shutdown operation, including: The indicator light is turned on and the buzzer is started to generate a light alarm; at the same time, the frequency of the inverter 21 is reduced, and the air suspension blower gradually stops running.

[0045] The above description shows and describes the preferred implementation of the present application, but as mentioned above, it should be understood that the present application is not limited to the form disclosed herein, and should not be regarded as excluding other implementations, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the object concept of this article through the above teachings or the technology or knowledge of the relevant field. The changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present application, and should be within the scope of protection of the claims attached to the present application.

Claims

1. An air suspension blower with early warning function, characterized in that: It includes a host, a data acquisition and processing module, an early warning module, a main controller and a frequency converter; the host includes a casing, a rotor and a stator, the rotor and the stator are installed in the casing, and the stator is mounted on the outside of the rotor; radial air suspension bearings are respectively arranged between the front and rear ends of the rotor and the casing, the left end of the rotor is mounted with a first impeller, and the right end of the rotor is mounted with a heat dissipation impeller; and a detection unit is also installed at the right end of the rotor, the detection unit is located on the right side of the heat dissipation impeller, and the axial displacement and radial displacement of the rotor are detected by the detection unit; an axial air suspension bearing is also arranged between the first impeller and the radial air suspension bearing at the front end of the casing; the data acquisition and processing module is used to collect the axial displacement signal and radial displacement signal of the detection unit, and process and convert the displacement signal, and then transmit it to the main controller; The main controller is used to send warning instructions to the warning module and control the frequency of the inverter based on the received axial displacement signal and radial displacement signal; the warning module is used to issue a warning according to the warning instruction issued by the main controller.

2. The air suspension blower with early warning function according to claim 1, characterized in that: The rotor includes a permanent magnetic core, a shaft head and a pull rod, and shaft heads are arranged at both ends of the permanent magnetic core; one end of the left pull rod passes through the shaft head and is threadedly connected to the permanent magnetic core, the other end of the left pull rod passes through the first impeller, and the outer side of the first impeller is fixed to the pull rod by a nut; an axial adjustment impeller is arranged between the left shaft head and the permanent magnetic core, which is used to balance the axial force acting on the rotor; one end of the right pull rod passes through the shaft head and is threadedly connected to the permanent magnetic core, the other end of the right pull rod passes through the heat dissipation impeller, and the outer side of the heat dissipation impeller is fixed to the pull rod by a nut.

3. The air suspension blower with early warning function according to claim 2, characterized in that: The axially adjustable impeller is installed in the same direction as the first impeller, and the heat dissipation impeller is installed in the opposite direction to the axially adjustable impeller.

4. The air suspension blower with early warning function according to claim 2, characterized in that: The detection part is a cylinder, one end of which is provided with an external thread, the tightening direction of the external thread is opposite to the rotation direction of the rotor, and the detection part is connected to the internal thread of the right pull rod through the external thread.

5. The air suspension blower with early warning function according to claim 1, characterized in that: The data acquisition and processing module includes a radial displacement sensor, an axial displacement sensor, a temperature sensor, a signal conditioning circuit and an analog-to-digital converter; the output ends of the radial displacement sensor, the axial displacement sensor and the temperature sensor are connected to the signal conditioning circuit, and the signal conditioning circuit is connected to the analog-to-digital converter; four radial displacement sensors are arranged circumferentially of the detection part, and the four radial displacement sensors are distributed in the positive and negative directions of the X-axis and the Y-axis, and an axial displacement sensor and a temperature sensor are arranged on the right side of the detection part; the signal conditioning circuit is used to amplify, filter and bias the detection signals of the radial displacement sensor, the axial displacement sensor and the temperature sensor; the analog-to-digital converter is used to convert the analog signal output by the signal conditioning circuit into a digital signal.

6. The air suspension blower with early warning function according to claim 5, characterized in that: The air suspension blower further includes a radial displacement sensor seat and an axial displacement sensor seat. The radial displacement sensor seat is sleeved outside the detection part, and the radial displacement sensors are installed in the radial displacement sensor seat and evenly distributed around the rotor. The axial displacement sensor seat is fixed to the right end of the main machine, and the axial displacement sensor and the temperature sensor are both fixed on the axial displacement sensor seat. The axial displacement sensor is installed coaxially with the rotor, and the temperature sensor is arranged on one side of the axial displacement sensor.

7. The early warning method for an air suspension blower with early warning function according to any one of claims 1 to 6, characterized in that: including: Calibrate the radial displacement sensor and the axial displacement sensor respectively; Collect the displacement X of the rotor in the X-axis direction, the displacement Y of the rotor in the Y-axis direction, and the displacement Z of the rotor in the Z-axis direction, and obtain the displacement offset ΔX of the rotor in the X-axis direction, the displacement offset ΔY of the rotor in the Y-axis direction, and the displacement offset ΔZ of the rotor in the Z-axis direction; When the displacement offset ΔX of the rotor in the X-axis direction, or the displacement offset ΔY of the rotor in the Y-axis direction, or the displacement offset ΔZ of the rotor in the Z-axis direction exceeds the set value, the main controller sends a warning signal to the warning module and controls the frequency converter to perform a shutdown operation.

8. The early warning method according to claim 7, characterized in that: The calibration process of the radial displacement sensor and the axial displacement sensor is as follows: In the case where the rotor in the main machine is not levitated, apply a force only in the negative / positive X-axis direction of the rotor, so that the radial air suspension bearing reaches the maximum movable displacement in the negative / positive X-axis direction, which is X1 / X2, and calibrate the output values of the corresponding displacement sensor modules as A1 / A2. Then the radial displacement output range in the X-axis direction is [A1, A2]. When the rotor is at the middle of the maximum movable displacement in the X-axis direction, calibrate the output value of the radial displacement sensor in the X-axis direction as (A1 + A2) / 2; In the case where the rotor in the main machine is not levitated, apply a force only in the negative / positive Y-axis direction of the rotor, so that the radial air suspension bearing reaches the maximum movable displacement in the negative / positive Y-axis direction, which is Y1 / Y2, and calibrate the output values of the corresponding displacement sensor modules as B1 / B2. Then the radial displacement output range in the Y-axis direction is [B1, B2]. When the rotor is at the middle of the maximum movable displacement in the Y-axis direction, calibrate the output value of the radial displacement sensor in the Y-axis direction as (B1 + B2) / 2; In the case where the rotor in the main machine is not levitated, apply a force only in the negative / positive Z-axis direction of the rotor, so that the axial air suspension bearing reaches the maximum movable displacement in the negative / positive Z-axis direction, which is Z1 / Z2, and calibrate the output values of the corresponding displacement sensor modules as C1 / C2. Then the displacement signal output range in the Z-axis direction is [C1, C2]. When the rotor is at the middle of the maximum movable displacement in the Z-axis direction, calibrate the output value of the axial displacement sensor in the Z-axis direction as (C1 + C2) / 2.

9. The early warning method according to claim 7, characterized in that: The displacement offset is the distance between the rotor and the middle position of the maximum movable displacement; the displacement offset ΔX of the rotor in the X-axis direction = 丨X - (X1 + X2) / 2丨; The displacement offset ΔY of the rotor in the Y-axis direction = 丨Y - (Y1 + Y2) / 2丨; The displacement offset ΔZ of the rotor in the Z-axis direction = 丨Z - (Z1 + Z2) / 2丨; The setting value A of the displacement offset △X of the rotor in the X-axis direction is (X2-X1+2aM) / 2; M is the maximum recoverable deformation of the radial air suspension bearing in the x-axis direction; a is the safety factor of the radial air suspension bearing in the X-axis direction; The setting value B of the rotor displacement offset △Y in the Y-axis direction is (Y2-Y1+2bN) / 2; N is the maximum recoverable deformation of the radial air suspension bearing in the y-axis direction; b is the safety factor of the radial air suspension bearing in the Y-axis direction; The setting value C of the displacement offset △Z of the rotor in the Z-axis direction is (Z2-Z1+2cQ) / 2; Q is the maximum recoverable deformation of the axial air suspension bearing in the z-axis direction, and c is the safety factor of the axial air suspension bearing in the z-axis direction.

10. The early warning method according to claim 7, characterized in that: The main controller sends a warning signal to the warning module and controls the frequency converter to perform a shutdown operation, including: The indicator light is turned on and the buzzer is started to generate a light alarm; at the same time, the frequency of the inverter is reduced and the air suspension blower gradually stops running.

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