CN-121976976-A - Efficient energy-saving magnetic suspension fan and operation method

CN121976976ACN 121976976 ACN121976976 ACN 121976976ACN-121976976-A

Abstract

The invention provides a high-efficiency energy-saving magnetic suspension fan and an operation method thereof, which relate to the field of magnetic suspension fans and comprise a double-head impeller driving piece, a first-stage air inlet pipe orifice, a positioning mounting plate, a first-stage air outlet volute, a second-stage air inlet pipe orifice, a second-stage air outlet volute and a shunt connecting pipeline; the first-stage air inlet pipe orifice is connected to the left side of the double-head impeller driving piece through bolts; the first-stage air outlet volute is connected to the left side of the double-head impeller driving piece through bolts; the invention reduces the occurrence probability of fan surge faults caused by filter element blockage, and solves the problem that the filter element blockage easily affects the air inlet density and the effective air inlet quantity and triggers the fan surge.

Inventors

ZHANG JIACHENG
WANG JIABIN
MENG DEJIAN
CHEN HUANXIN
Shan Zhongwu

Assignees

贵州中航华强科技有限公司

Dates

Publication Date: 20260505
Application Date: 20260325

Claims (10)

1. A high-efficiency energy-saving magnetic suspension fan comprises a double-head impeller driving piece (1), a first-stage air inlet pipe orifice (2), a positioning mounting plate (3), a first-stage air outlet volute (4), a second-stage air inlet pipe orifice (5), a separation structure, a cleaning structure, a second-stage air outlet volute (6) and a shunt connecting pipeline (7), wherein the first-stage air inlet pipe orifice (2) is connected to the left side of the double-head impeller driving piece (1) through bolts, the first-stage air outlet volute (4) is connected to the left side of the double-head impeller driving piece (1) through bolts, the second-stage air inlet pipe orifice (5) is connected to the right side of the double-head impeller driving piece (1) through bolts, the second-stage air outlet volute (6) is connected to the right side of the double-head impeller driving piece (1) through bolts, the positioning mounting plate (3) is provided with a plurality of positioning mounting plates (3) which are respectively and fixedly connected to the inner side of the first-stage air inlet pipe orifice (2) and the inner side of the second-stage air outlet volute (6), the separation structure is arranged on the outer side of the double-head impeller driving piece (1), the second-stage air outlet volute (7) is fixedly connected to the right side of the double-head volute (6), the left end of the shunt connecting pipeline (7) is fixedly connected to the rear side of the primary air inlet pipe orifice (2), and the cleaning structure is arranged on the left side of the double-head impeller driving piece (1).
2. The efficient and energy-saving magnetic suspension fan as claimed in claim 1, wherein the separation structure comprises an air booster impeller (101) and a centrifugal impurity removal wind wheel (103), the air booster impeller (101) is fixedly connected to the left side and the right side of an output shaft of the double-head impeller driving piece (1), and the centrifugal impurity removal wind wheel (103) is fixedly connected to the left side of the air booster impeller (101).
3. The efficient and energy-saving magnetic suspension fan as claimed in claim 2, wherein the separation structure further comprises a limit mounting box (201) and a limit mounting plate (203), the limit mounting box (201) is in threaded connection with the outer side of the primary air inlet pipe orifice (2), and the limit mounting plate (203) is fixedly connected with the inner side of the limit mounting box (201).
4. A high efficiency energy saving magnetic levitation blower according to claim 3 wherein the separation structure further comprises an impurity collection bag (204) and a connecting screw seat (205), wherein the impurity collection bag (204) is bolted to the outside of the spacing mounting plate (203), and the connecting screw seat (205) is screwed to the outside of the spacing mounting box (201).
5. The efficient and energy-saving magnetic suspension fan as claimed in claim 4, wherein the separation structure further comprises a sealing connecting pipe (206) and an air filtering core (207), the sealing connecting pipe (206) is in threaded connection with the inner side of the connecting threaded seat (205), the left end of the sealing connecting pipe (206) is connected with a gas-liquid cyclone separation device, and the air filtering core (207) is fixedly connected with the inner side of the primary air inlet pipe orifice (2).
6. The efficient and energy-saving magnetic suspension fan as claimed in claim 5, wherein the separation structure further comprises a guide connecting pipeline (401), the left end of the guide connecting pipeline (401) is fixedly connected to the front side of the primary air outlet volute (4), and the right end of the guide connecting pipeline (401) is fixedly connected to the right side of the secondary air inlet pipe orifice (5).
7. The efficient and energy-saving magnetic suspension fan as claimed in claim 6, wherein the separation structure further comprises a shunt electromagnetic valve (701), the shunt electromagnetic valve (701) is fixedly connected to the right side of the shunt connecting pipeline (7), a low-pressure taking pipe of a first differential pressure sensor is arranged on the left side of the positioning mounting plate (3) positioned at the rear inside the primary air inlet pipe orifice (2), a high-pressure taking pipe of the first differential pressure sensor is arranged on the rear side of the positioning mounting plate (3) positioned at the inner side of the secondary air outlet volute (6), and a control circuit of the shunt electromagnetic valve (701) is connected in series with a control circuit of the first differential pressure sensor.
8. The efficient and energy-saving magnetic suspension fan as claimed in claim 7, wherein the cleaning structure comprises an impurity cleaning scraper (102) and an impurity collecting box (202), the impurity cleaning scraper (102) is fixedly connected to the left side of the air booster impeller (101) at the left side, and the impurity collecting box (202) is connected to the front side of the primary air inlet pipe orifice (2) through bolts.
9. The efficient and energy-saving magnetic suspension fan as claimed in claim 8, wherein the cleaning structure further comprises an audible and visual alarm (208), a high-pressure taking pipe of a second pressure difference sensor is arranged on the left side of the limiting installation box (201), a low-pressure taking pipe of the second pressure difference sensor is arranged on the left side of the positioning installation plate (3) positioned in front of the primary air inlet pipe orifice (2), the audible and visual alarm (208) is connected to the upper portion of the primary air inlet pipe orifice (2) through bolts, and a control circuit of the audible and visual alarm (208) is connected with a control circuit of the second pressure difference sensor in series.
10. The method for operating a high-efficiency energy-saving magnetic levitation blower according to claims 1 to 9, wherein: S1, sealing and butting the left end of a sealing connecting pipe with a front gas-liquid cyclone separation device, completing self-checking of control circuits of a first differential pressure sensor, a second differential pressure sensor, a shunt electromagnetic valve and an audible and visual alarm, confirming that all parts are in a normal standby state, and checking that valves of inlet and outlet pipelines of a fan are in a full-open state; S2, starting a magnetic suspension bearing control system, stably suspending a main shaft at a designed central position through a radial magnetic bearing and an axial magnetic bearing, starting a double-head impeller driving piece after the suspension state is stable, driving air pressurizing impellers at two ends to synchronously rotate through an output shaft, and simultaneously driving a centrifugal impurity removing wind wheel and an impurity cleaning scraping plate to coaxially rotate along with the main shaft; S3, after the gas-liquid separation of the external air is finished through the front gas-liquid cyclone separation device, the external air enters a limit mounting box through a sealing connecting pipe, and the rotating centrifugal impurity removing wind wheel throws large particle dust and floccules in the air towards the limit mounting plate through centrifugal force, so that impurities enter an impurity collecting bag along with the air flow to finish pre-separation collection; S4, the purified air enters a first-stage air outlet volute, the air is pressurized by a left-side air pressurizing impeller to complete first-stage pressurization, the air after the first-stage pressurization is conveyed to a second-stage air inlet pipe orifice through a guide connecting pipeline, the second-stage pressurization is completed by a right-side air pressurizing impeller, and finally the pressurized high-pressure air is conveyed to a tail end pipe network through the second-stage air outlet volute; S5, the first differential pressure sensor monitors the pressure difference between the air inlet side and the air outlet side of the fan in real time through the low-pressure taking pipe and the high-pressure taking pipe, when the pressure difference of the air inlet and the air outlet exceeds a preset safety threshold, a control circuit of the first differential pressure sensor sends an opening signal to the shunt electromagnetic valve, the shunt electromagnetic valve is automatically opened, high-pressure air in the secondary air outlet volute flows through a shunt connecting pipeline to flow back to the air inlet side of the primary air inlet pipe orifice, the air inlet flow of the fan is supplemented, and the operation condition of the fan is always in a safety zone above a surge boundary; S6, in the rotation process of the main shaft, the impurity cleaning scraping plate synchronously rotates along with the shaft, impurities attached to the surface of the air filter core are continuously scraped, and pushed into the impurity collecting box to be collected under the action of centrifugal force, so that the air filter core is cleaned on line; S7, when stopping operation is executed, the double-head impeller driving piece is controlled to gradually slow down to an idle state, then the driving piece is cut off for power supply, and after the main shaft is completely stopped, the magnetic suspension bearing control system is closed, so that the whole machine stopping process is completed.

Description

Efficient energy-saving magnetic suspension fan and operation method Technical Field The invention relates to the technical field of magnetic suspension fans, in particular to an efficient and energy-saving magnetic suspension fan and an operation method thereof. Background The active magnetic suspension bearing system firstly completes stable suspension of the main shaft, a radial magnetic bearing stator and coils of an axial magnetic bearing stator are electrified to generate controllable magnetic fields, differential electromagnetic attraction is respectively generated on radial magnetic bearing rotors and bidirectional thrust discs which are coaxially and fixedly connected on the main shaft, a multichannel micron-sized displacement sensor detects radial and axial position deviations of the main shaft in real time and feeds signals back to a bearing controller, the controller dynamically adjusts the current of each magnetic pole coil through high-frequency closed loop negative feedback, corrects electromagnetic force in real time, always stably constrains the main shaft at a designed center position, realizes complete non-contact support in the radial and axial directions of the main shaft, after the main shaft is suspended stably, a high-speed permanent magnet synchronous motor which is coaxially and directly driven with the main shaft is started to drive two-stage three-way centrifugal impellers at two ends of the main shaft to rotate at a high speed, air flows axially from an air inlet into the center of a first-stage impeller, impeller blades which rotate at the high speed drive air to do circular motion, the air is thrown towards the outer edge of the impeller under the centrifugal force, static pressure energy and kinetic energy are synchronously lifted greatly, then the air flow enters a first-stage impeller to be cooled, enters a second-stage impeller to complete secondary stage impeller after entering the second-stage impeller, finally, and finally the high-speed gradually enters the volute airflow to complete the dynamic energy expansion of the volute, and the air flow is converted into the static pressure energy, and the compressed air flow. For example, publication number CN118548235A discloses a magnetic suspension fan, which comprises a main shaft and a stator, and further comprises a sectional assembly housing, wherein an inner front end part and a magnetic bearing support are respectively arranged at the front end and the rear end of the sectional assembly housing, a hollow chamber is arranged between the inner front end part and the magnetic bearing support, the stator is installed in the hollow chamber and fixedly connected with the inner wall of the sectional assembly housing, a radial bearing and an axial bearing are installed at one side of the inner front end part, which is far away from the hollow chamber, a radial bearing is arranged at one side, which is far away from the hollow chamber, of the magnetic bearing support, the main shaft is positioned at the central axis of the stator under the restraint of the radial bearing and the axial bearing, a small impeller is installed at the tail end of the main shaft, when the main shaft rotates after being electrified, the small impeller rotates along with the main shaft to absorb air flow into the air chamber, and then blows heat generated by the stator out of the air chamber through an air duct, the inner front end part and the magnetic bearing support can separate the radial bearing from the axial bearing from the hollow chamber, and the radial bearing, and the axial bearing are arranged at one side, and the hollow chamber, the radial bearing is so that the heat generated by the stator is reduced, and the heat generated by the magnetic bearing is interfered by the magnetic bearing. However, air needs to be filtered through a filter element before entering the magnetic suspension fan, the filter element is blocked due to accumulation of impurities after long-term use, the air inlet flow area is influenced, the air inlet resistance is larger, the air inlet density and the effective air inlet quantity are further influenced, the fan operation working condition is deviated to a surge boundary with low flow and high pressure ratio, the distortion of an impeller inlet flow field and the separation of air flow are caused, the pneumatic instability is caused, the fan surge is finally triggered, and the whole machine is severely vibrated, and the high-speed impeller and the magnetic suspension bearing are damaged by impact. Disclosure of Invention In view of the above, the present invention provides a high-efficiency and energy-saving magnetic suspension fan and operation method, which completes high-efficiency pre-separation and secondary fine filtration of large particle dust, floccules and other impurities in air before the air enters a core supercharging component through a centrifugal impurity removal wind wheel and an air filter core, th