CN113315097A - Bus overvoltage protection device of magnetic suspension centrifuge and implementation method thereof - Google Patents
Bus overvoltage protection device of magnetic suspension centrifuge and implementation method thereof Download PDFInfo
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- CN113315097A CN113315097A CN202110485865.1A CN202110485865A CN113315097A CN 113315097 A CN113315097 A CN 113315097A CN 202110485865 A CN202110485865 A CN 202110485865A CN 113315097 A CN113315097 A CN 113315097A
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- metal sheet
- bus overvoltage
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/22—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions for distribution gear, e.g. bus-bar systems; for switching devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
- B04B—CENTRIFUGES
- B04B15/00—Other accessories for centrifuges
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B17/00—Fire alarms; Alarms responsive to explosion
- G08B17/10—Actuation by presence of smoke or gases, e.g. automatic alarm devices for analysing flowing fluid materials by the use of optical means
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H1/00—Contacts
- H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
- H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/26—Power arrangements internal to the switch for operating the driving mechanism using dynamo-electric motor
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/20—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess voltage
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- General Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Centrifugal Separators (AREA)
Abstract
The invention discloses a bus overvoltage protection device of a magnetic suspension centrifuge and an implementation method thereof, belonging to the technical field of magnetic suspension centrifuges. According to the bus overvoltage protection device and the implementation method thereof, whether the bus of the magnetic suspension centrifuge has overvoltage or not can be detected in real time through the bus overvoltage detection mechanism, and the bus overvoltage condition of the magnetic suspension centrifuge is protected in time through the bus overvoltage protection mechanism, so that the magnetic suspension centrifuge is prevented from being damaged, and the service life of the magnetic suspension centrifuge can be prolonged.
Description
Technical Field
The invention relates to the technical field of magnetic suspension centrifuges, in particular to a bus overvoltage protection device of a magnetic suspension centrifuge and an implementation method thereof.
Background
The magnetic suspension centrifugal machine belongs to the centrifugal chiller family, and the product improves the operation efficiency and the performance stability of the centrifugal central air conditioner by utilizing a direct current variable frequency driving technology, a patented full-falling film evaporation technology, a subcooler technology, an intelligent anti-surge technology based on an industrial microcomputer, a magnetic suspension oil-free operation technology and the like. The magnetic suspension frequency conversion centrifuge is a high and new technology integrating electromagnetism, electronic technology, automatic control, sensing, mechanical transmission and rotor dynamics, is applied to a central air-conditioning refrigeration host, can improve the energy efficiency of a unit, reduce the operation cost, prolong the service life of the unit and reduce the after-sale maintenance cost of the unit.
When the magnetic suspension centrifugal machine is used, the magnetic suspension centrifugal machine has the following characteristics: 1. energy conservation: the full-series double-stage energy efficiency is 3-10% higher than that of a D-brand compressor under GB and AHRI working conditions, the highest GB-IPLV value is more than 8.8, and the highest AHRI-IPLV value is 10.3; 2. the operation range is as follows: under the condition of optimal efficiency due to multiple adjustment and combined control, the operation range of the unit is widened, and the refrigeration load of a single compressor can be reduced to below 10%; 3. and (3) stabilizing: the double-ceramic standby landing bearing and self-power generation control mode guarantees safe and stable operation of the unit, can realize power-off standby landing for more than 10 times under full-speed operation, and can guarantee power-off suspension operation at the rotating speed of 900r/h at the minimum; 4. environmental protection and low noise: the noise is quiet and environment-friendly, and the running noise is as low as 70 dB.
When the existing magnetic suspension centrifugal machine is used, the situation that the bus of the magnetic suspension centrifugal machine is in overvoltage often exists, and if the situation is protected without corresponding measures, the magnetic suspension centrifugal machine is extremely easy to damage, and the service life of the magnetic suspension centrifugal machine is shortened.
Disclosure of Invention
The invention aims to provide a bus overvoltage protection device of a magnetic suspension centrifuge and an implementation method thereof.
In order to achieve the purpose, the invention provides the following technical scheme:
the utility model provides a magnetic suspension centrifuge generating line overvoltage protection device, includes the solid fixed shell body, the inboard of solid fixed shell body is provided with generating line overvoltage detection mechanism and generating line overvoltage protection mechanism, generating line overvoltage detection mechanism connects in generating line overvoltage protection mechanism, solid fixed shell body is worn out to generating line overvoltage protection mechanism, smoke transducer and audible-visual annunciator are installed at the top of solid fixed shell body, smoke transducer and audible-visual annunciator all are connected with generating line overvoltage detection mechanism.
Further, generating line excessive pressure detection mechanism includes AD sample thief, digital signal amplification filter processor, generating line excessive pressure threshold value storage module, generating line excessive pressure detection ratio and compares module and generating line excessive pressure detection microprocessor, the output of AD sample thief is connected with digital signal amplification filter processor's input electricity, digital signal amplification filter processor's output is connected with generating line excessive pressure detection microprocessor's input electricity, generating line excessive pressure detection microprocessor's output is connected with generating line excessive pressure threshold value storage module's input electricity, generating line excessive pressure threshold value storage module's output is connected with generating line excessive pressure detection ratio module's input electricity, generating line excessive pressure detection ratio module is connected with generating line excessive pressure detection microprocessor electricity.
Further, generating line overvoltage protection mechanism is including fixed interior casing, biax driving motor, first transmission lead screw, second transmission lead screw, first sideslip slider and second sideslip slider, fixed interior casing inlays the inboard at fixed shell body, the inboard of fixed interior casing is provided with biax driving motor, biax driving motor's biax all is connected with first transmission lead screw and second transmission lead screw respectively through the shaft coupling, the one end that biax driving motor was all kept away from to first transmission lead screw and second transmission lead screw all is installed on the inner wall of fixed interior casing through the bearing, first transmission lead screw threaded connection has first sideslip slider, second transmission lead screw threaded connection has second sideslip slider.
Further, generating line overvoltage protection mechanism includes first sheetmetal pin, second sheetmetal pin, expanding spring and flexible guide post, be connected with first sheetmetal pin on the first sideslip slider, be connected with the second sheetmetal pin on the second sideslip slider, first sheetmetal pin and second sheetmetal pin all wear out fixed interior casing and extend to the outside of fixed shell body, first sheetmetal pin and second sheetmetal pin still are connected through expanding spring and flexible guide post, the both ends of expanding spring and flexible guide post are equallyd divide and are do not connected on the side of first sheetmetal pin and second sheetmetal pin.
Furthermore, the output end of the smoke sensor is electrically connected with the input end of the bus overvoltage detection microprocessor, the output end of the bus overvoltage detection microprocessor is electrically connected with the input end of the audible and visual alarm, and the output end of the bus overvoltage detection microprocessor is also electrically connected with the input end of the double-shaft driving motor.
Furthermore, guide sliding seats are mounted on the first transverse sliding block and the second transverse sliding block, the guide sliding seats are embedded on the fixed inner shell, a first strip-shaped guide sliding groove for the guide sliding seats to transversely move is formed in the inner wall of the fixed inner shell, and the guide sliding seats are matched with the first strip-shaped guide sliding groove.
Furthermore, a second strip-shaped guide sliding groove for transversely moving the first metal sheet pin and the second metal sheet pin is formed in the top of the fixed inner shell, the first metal sheet pin and the second metal sheet pin are matched with the second strip-shaped guide sliding groove, and the first metal sheet pin and the second metal sheet pin are connected to the AD sampler through wires.
Furthermore, the first metal sheet pin and the second metal sheet pin are fixed on the tops of the first transverse moving sliding block and the second transverse moving sliding block respectively through long bolts and through butterfly nuts.
Furthermore, the top of the first transverse moving sliding block and the top of the second transverse moving sliding block are both provided with mounting grooves for mounting the first metal sheet pin and the second metal sheet pin, and the first metal sheet pin and the second metal sheet pin are both matched with the mounting grooves.
According to another aspect of the invention, an implementation method of a bus overvoltage protection device of a magnetic suspension centrifuge is provided, which comprises the following steps:
s1: the AD sampler samples the bus voltage of the magnetic suspension centrifuge, processes the voltage through the digital signal amplification and filtration processor, and then transmits the processed signal information to the bus overvoltage detection microprocessor;
s2: comparing the transmitted signal information with an information value stored in a bus overvoltage threshold storage module through a bus overvoltage detection comparison module;
s3: if the transmitted signal information is higher than the bus overvoltage threshold value, the bus overvoltage detection microprocessor controls the double-shaft driving motor to start;
s4: the double-shaft driving motor drives the first transmission screw rod and the second transmission screw rod to rotate so as to enable the first metal sheet pin and the second metal sheet pin to move reversely, so that the first metal sheet pin and the second metal sheet pin are far away from each other, and a closed loop is disconnected;
s5: the smoke sensor detects the smoke condition in real time, and if the smoke is too large, the bus overvoltage detection microprocessor controls the audible and visual alarm to give an audible and visual alarm.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention relates to a bus overvoltage protection device of a magnetic suspension centrifuge and an implementation method thereof, wherein a bus overvoltage detection mechanism comprises an AD sampler, a digital signal amplification and filtration processor, a bus overvoltage threshold storage module, a bus overvoltage detection comparison module and a bus overvoltage detection microprocessor, the output end of the AD sampler is electrically connected with the input end of the digital signal amplification and filtration processor, the output end of the digital signal amplification and filtration processor is electrically connected with the input end of the bus overvoltage detection microprocessor, the output end of the bus overvoltage detection microprocessor is electrically connected with the input end of the bus overvoltage threshold storage module, the output end of the bus overvoltage threshold storage module is electrically connected with the input end of the bus overvoltage detection comparison module, the bus overvoltage detection comparison module is electrically connected with the bus overvoltage detection microprocessor, transmitted signal information is compared with a bus overvoltage threshold stored in the bus overvoltage threshold storage module through the bus overvoltage detection comparison module, and if the transmitted signal information is higher than the bus overvoltage threshold value, the bus overvoltage detection microprocessor controls the bus overvoltage protection mechanism to start, so that the bus overvoltage protection mechanism carries out overvoltage protection on the bus of the magnetic suspension centrifuge.
2. The invention relates to a bus overvoltage protection device of a magnetic suspension centrifuge and an implementation method thereof, wherein a bus overvoltage protection mechanism comprises a fixed inner shell, a double-shaft driving motor, a first transmission screw rod, a second transmission screw rod, a first transverse moving slide block, a second transverse moving slide block, a first metal sheet pin, a second metal sheet pin, a telescopic spring and a telescopic guide post, the double-shaft driving motor drives the first transmission screw rod and the second transmission screw rod to rotate so that the first transverse moving slide block and the second transverse moving slide block move in opposite directions under the guide action of a guide slide seat, the first transverse moving slide block and the second transverse moving slide block move in opposite directions so that the first metal sheet pin and the second metal sheet pin are far away and a closed loop is disconnected, thereby realizing bus overvoltage protection of the magnetic suspension centrifuge and effectively avoiding the magnetic suspension centrifuge from being damaged, the service life of the magnetic suspension centrifuge can be prolonged.
3. The invention relates to a bus overvoltage protection device of a magnetic suspension centrifuge and an implementation method thereof.A smoke sensor output end is electrically connected with an input end of a bus overvoltage detection microprocessor, the output end of the bus overvoltage detection microprocessor is electrically connected with an input end of an audible and visual alarm, the smoke sensor is used for carrying out real-time smoke detection on a bus of the magnetic suspension centrifuge, and if smoke at the bus of the magnetic suspension centrifuge exceeds a preset value, the bus overvoltage detection microprocessor controls the audible and visual alarm to carry out audible and visual alarm so as to avoid fire.
Drawings
FIG. 1 is a schematic diagram of a bus overvoltage protection device of a magnetic suspension centrifuge of the present invention;
FIG. 2 is a schematic partial cross-sectional view of a bus overvoltage protection device of a magnetic suspension centrifuge of the present invention;
FIG. 3 is a schematic view of a bus overvoltage detection mechanism connected to the bus overvoltage protection mechanism of the present invention;
FIG. 4 is a schematic cross-sectional view of a bus overvoltage protection mechanism of the present invention;
FIG. 5 is a schematic view of a first metal sheet pin of the present invention connected to a first traverse slider by a long bolt and a wing nut;
FIG. 6 is an exploded view of a first sheet metal pin of the present invention attached to a first traverse slider by a long bolt and a wing nut;
fig. 7 is a block diagram of a bus overvoltage protection device of a magnetic suspension centrifuge.
In the figure: 1. fixing the housing; 2. a bus overvoltage detection mechanism; 21. an AD sampler; 22. a digital signal amplifying and filtering processor; 23. a bus overvoltage threshold storage module; 24. a bus overvoltage detection comparison module; 25. a bus overvoltage detection microprocessor; 3. a bus overvoltage protection mechanism; 31. fixing the inner shell; 311. a first bar-shaped guide chute; 312. a second strip-shaped guide chute; 32. a dual-axis drive motor; 33. a first drive screw; 34. a second drive screw; 35. a first traverse slide block; 351. a guide slide; 352. mounting grooves; 36. a second traverse slide block; 37. a first sheet metal pin; 38. a second metal sheet pin; 39. a tension spring; 310. a telescopic guide post; 4. a smoke sensor; 5. an audible and visual alarm; 6. a long bolt; 61. butterfly nuts.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-2, a bus overvoltage protection device of a magnetic suspension centrifuge comprises a fixed outer shell 1, a bus overvoltage detection mechanism 2 and a bus overvoltage protection mechanism 3 are arranged on the inner side of the fixed outer shell 1, the bus overvoltage detection mechanism 2 is connected to the bus overvoltage protection mechanism 3, the bus overvoltage protection mechanism 3 penetrates out of the fixed outer shell 1, the bus overvoltage detection mechanism 2 can detect the bus of the magnetic suspension centrifuge in real time, and can know whether the bus of the magnetic suspension centrifuge is overvoltage in time, the bus overvoltage protection mechanism 3 can protect the bus of the magnetic suspension centrifuge in time to avoid the damage of the magnetic suspension centrifuge, the service life of the magnetic suspension centrifuge can be prolonged, a smoke sensor 4 and an audible and visual alarm 5 are arranged on the top of the fixed outer shell 1, the smoke sensor 4 and the audible and visual alarm 5 are both connected with the bus overvoltage detection mechanism 2, the smoke sensor 4 is used for detecting smoke of the magnetic suspension centrifuge bus in real time, and if the smoke at the magnetic suspension centrifuge bus exceeds a preset value, the bus overvoltage detection microprocessor 25 controls the audible and visual alarm 5 to give an audible and visual alarm to avoid fire.
Referring to fig. 3 and 7, the bus overvoltage detection mechanism 2 includes an AD sampler 21, a digital signal amplification and filtration processor 22, a bus overvoltage threshold storage module 23, a bus overvoltage detection comparison module 24, and a bus overvoltage detection microprocessor 25, wherein an output end of the AD sampler 21 is electrically connected to an input end of the digital signal amplification and filtration processor 22, an output end of the digital signal amplification and filtration processor 22 is electrically connected to an input end of the bus overvoltage detection microprocessor 25, an output end of the bus overvoltage detection microprocessor 25 is electrically connected to an input end of the bus overvoltage threshold storage module 23, an output end of the bus overvoltage threshold storage module 23 is electrically connected to an input end of the bus overvoltage detection comparison module 24, the bus overvoltage detection comparison module 24 is electrically connected to the bus overvoltage detection microprocessor 25, and an output end of the smoke sensor 4 is electrically connected to an input end of the bus overvoltage detection microprocessor 25, the output end of the bus overvoltage detection microprocessor 25 is electrically connected with the input end of the audible and visual alarm 5, the output end of the bus overvoltage detection microprocessor 25 is also electrically connected with the input end of the double-shaft driving motor 32, the bus voltage of the magnetic suspension centrifuge is sampled by the AD sampler 21, the sampled voltage signal is transmitted to the digital signal amplification and filtration processor 22, the digital signal amplification and filtration processor 22 processes the voltage signal, the processed signal information is transmitted to the bus overvoltage detection microprocessor 25, the transmitted signal information is compared with the bus overvoltage threshold value stored in the bus overvoltage threshold value storage module 23 by the bus overvoltage detection comparison module 24, if the transmitted signal information is higher than the bus overvoltage threshold value, the bus overvoltage detection microprocessor 25 controls the bus overvoltage protection mechanism 3 to start, so that the bus overvoltage protection mechanism 3 protects the bus overvoltage of the magnetic suspension centrifuge, avoid magnetic suspension centrifuge to damage, can improve magnetic suspension centrifuge's life.
Referring to fig. 4-6, the bus overvoltage protection mechanism 3 includes a fixed inner housing 31, a dual-axis driving motor 32, a first transmission lead screw 33, a second transmission lead screw 34, a first traverse slider 35 and a second traverse slider 36, the fixed inner housing 31 is embedded inside the fixed outer housing 1, the dual-axis driving motor 32 is disposed inside the fixed inner housing 31, the dual axes of the dual-axis driving motor 32 are respectively connected with the first transmission lead screw 33 and the second transmission lead screw 34 through a coupler, one ends of the first transmission lead screw 33 and the second transmission lead screw 34 far away from the dual-axis driving motor 32 are both mounted on the inner wall of the fixed inner housing 31 through a bearing, the first transmission lead screw 33 is in threaded connection with the first traverse slider 35, the second transmission lead screw 34 is in threaded connection with the second traverse slider 36, the first traverse slider 35 and the second traverse slider 36 are both mounted with a guide slider 351, the guide slider 351 is embedded on the fixed inner housing 31, the inner wall of the fixed inner shell 31 is provided with a first strip-shaped guide chute 311 for the guide slide seat 351 to transversely move, the guide slide seat 351 is matched with the first strip-shaped guide chute 311, the double-shaft driving motor 32 drives the first transmission screw rod 33 and the second transmission screw rod 34 to rotate, the first transmission screw rod 33 and the second transmission screw rod 34 can respectively enable the first transverse moving slide block 35 and the second transverse moving slide block 36 to reversely move or oppositely move under the guide effect of the guide slide seat 351 in the process of uniform rotation, so that the disconnection and the closing of a loop can be realized, the damage of the magnetic suspension centrifuge can be effectively avoided, the service life of the magnetic suspension centrifuge can be prolonged, the bus overvoltage protection mechanism 3 comprises a first metal sheet pin 37, a second metal sheet pin 38, an expansion spring 39 and an expansion guide column 310, the first metal sheet pin 37 is connected on the first transverse moving slide block 35, the second metal sheet pin 38 is connected on the second transverse moving slide block 36, the first sheet metal pin 37 and the second sheet metal pin 38 are fixed on the top of the first traverse slider 35 and the top of the second traverse slider 36 respectively through the long bolt 6 and locked by the butterfly nut 61, the top of the first traverse slider 35 and the top of the second traverse slider 36 are both provided with installation grooves 352 for the installation of the first sheet metal pin 37 and the second sheet metal pin 38 respectively, the first sheet metal pin 37 and the second sheet metal pin 38 are both adapted to the installation grooves 352, the first sheet metal pin 37 and the second sheet metal pin 38 both penetrate through the fixed inner shell 31 and extend to the outside of the fixed outer shell 1, the top of the fixed inner shell 31 is provided with a second strip-shaped guide chute 312 for the traverse movement of the first sheet metal pin 37 and the second sheet metal pin 38, the first sheet metal pin 37 and the second sheet metal pin 38 are both adapted to the second strip-shaped guide chute 312, the first traverse slider 35 and the second traverse slider 36 can move reversely or move oppositely to enable the first sheet metal pin 37 and the second sheet metal pin 36 to move oppositely The sheet metal pin 38 also moves reversely or oppositely, so that the first sheet metal pin 37 and the second sheet metal pin 38 are far away from each other and the closed loop is opened or the first sheet metal pin 37 and the second sheet metal pin 38 are close to each other and the opened loop is closed, the damage of the magnetic suspension centrifuge can be effectively avoided, the service life of the magnetic suspension centrifuge can be prolonged, the first sheet metal pin 37 and the second sheet metal pin 38 are both connected to the AD sampler 21 through conducting wires, the first sheet metal pin 37 and the second sheet metal pin 38 are also connected to the telescopic guide column 310 through the telescopic spring 39, two ends of the telescopic spring 39 and the telescopic guide column 310 are both connected to the side surfaces of the first sheet metal pin 37 and the second sheet metal pin 38, the double-shaft driving motor 32 drives the first transmission screw rod 33 and the second transmission screw rod 34 to rotate, and the first transmission screw rod 33 and the second transmission screw rod 34 can respectively enable the first traverse slide block 35 and the second traverse slide block 36 to rotate in the guide process of the guide screw rod The first traverse slide block 35 and the second traverse slide block 36 can respectively make the first metal sheet pin 37 and the second metal sheet pin 38 reversely move along with the first traverse slide block 35 and the second traverse slide block 36 reversely move under the guiding action of the slide seat 351, so that the first metal sheet pin 37 and the second metal sheet pin 38 are far away from each other and a closed loop is disconnected, further, the bus overvoltage protection of the magnetic suspension centrifugal machine is realized, the magnetic suspension centrifugal machine can be effectively prevented from being damaged, and the service life of the magnetic suspension centrifugal machine can be prolonged.
In order to better show the implementation process of the overvoltage protection device for the bus of the magnetic suspension centrifuge, the embodiment provides an implementation method of the overvoltage protection device for the bus of the magnetic suspension centrifuge, which includes the following steps:
s1: the AD sampler 21 samples the bus voltage of the magnetic suspension centrifuge, processes the voltage through the digital signal amplification and filtration processor 22, and then transmits the processed signal information to the bus overvoltage detection microprocessor 25;
s2: comparing the transmitted signal information with the information value stored in the bus overvoltage threshold storage module 23 through the bus overvoltage detection comparison module 24;
s3: if the transmitted signal information is higher than the bus overvoltage threshold value, the bus overvoltage detection microprocessor 25 controls the double-shaft driving motor 32 to start;
s4: the double-shaft driving motor 32 drives the first transmission screw rod 33 and the second transmission screw rod 34 to rotate so as to enable the first metal sheet pin 37 and the second metal sheet pin 38 to move reversely, so that the first metal sheet pin 37 and the second metal sheet pin 38 are far away from each other and a closed loop is opened;
s5: the smoke sensor 4 detects the smoke condition in real time, and if the smoke is too large, the bus overvoltage detection microprocessor 25 controls the audible and visual alarm 5 to give an audible and visual alarm.
In summary, the bus overvoltage protection device of the magnetic suspension centrifuge and the implementation method thereof of the present invention, the AD sampler 21 samples the bus voltage of the magnetic suspension centrifuge and processes the sampled signal by the digital signal amplifying and filtering processor 22, then transmits the processed signal information to the bus overvoltage detection microprocessor 25, compares the transmitted signal information with the information value stored in the bus overvoltage threshold storage module 23 by the bus overvoltage detection comparison module 24, if the transmitted signal information is higher than the bus overvoltage threshold, the bus overvoltage detection microprocessor 25 controls the dual-axis driving motor 32 to start, the dual-axis driving motor 32 drives the first transmission screw 33 and the second transmission screw 34 to rotate to make the first metal sheet pin 37 and the second metal sheet pin 38 move reversely, so that the first metal sheet pin 37 and the second metal sheet pin 38 are far away and the closed loop is disconnected, and the smoke sensor 4 detects the smoke condition in real time, if the smoke is too large, the bus overvoltage detection microprocessor 25 controls the audible and visual alarm 5 to give an audible and visual alarm, so that the damage of the magnetic suspension centrifugal machine can be effectively avoided, and the service life of the magnetic suspension centrifugal machine can be prolonged.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be able to cover the technical solutions and the inventive concepts of the present invention within the technical scope of the present invention.
Claims (10)
1. The utility model provides a magnetic suspension centrifuge generating line overvoltage protection device, includes fixed shell body (1), its characterized in that, the inboard of fixed shell body (1) is provided with generating line overvoltage detection mechanism (2) and generating line overvoltage protection mechanism (3), generating line overvoltage detection mechanism (2) are connected on generating line overvoltage protection mechanism (3), fixed shell body (1) is worn out in generating line overvoltage protection mechanism (3), smoke transducer (4) and audible-visual annunciator (5) are installed at the top of fixed shell body (1), smoke transducer (4) and audible-visual annunciator (5) all are connected with generating line overvoltage detection mechanism (2).
2. The bus overvoltage protection device of the magnetic suspension centrifuge according to claim 1, wherein the bus overvoltage detection mechanism (2) comprises an AD sampler (21), a digital signal amplification and filtration processor (22), a bus overvoltage threshold storage module (23), a bus overvoltage detection comparison module (24) and a bus overvoltage detection microprocessor (25), the output end of the AD sampler (21) is electrically connected with the input end of the digital signal amplification and filtration processor (22), the output end of the digital signal amplification and filtration processor (22) is electrically connected with the input end of the bus overvoltage detection microprocessor (25), the output end of the bus overvoltage detection microprocessor (25) is electrically connected with the input end of the bus overvoltage threshold storage module (23), the output end of the bus overvoltage threshold storage module (23) is electrically connected with the input end of the bus overvoltage detection comparison module (24), and the bus overvoltage detection comparison module (24) is electrically connected with the bus overvoltage detection microprocessor (25).
3. The bus overvoltage protection device of the magnetic suspension centrifuge as claimed in claim 2, wherein the bus overvoltage protection mechanism (3) comprises a fixed inner housing (31), a double-shaft driving motor (32), a first transmission screw (33), a second transmission screw (34), a first traverse slider (35) and a second traverse slider (36), the fixed inner housing (31) is embedded in the inner side of the fixed outer housing (1), the inner side of the fixed inner housing (31) is provided with the double-shaft driving motor (32), the double shafts of the double-shaft driving motor (32) are respectively connected with the first transmission screw (33) and the second transmission screw (34) through a coupler, one ends of the first transmission screw (33) and the second transmission screw (34) far away from the double-shaft driving motor (32) are respectively mounted on the inner wall of the fixed inner housing (31) through bearings, the first transmission screw rod (33) is in threaded connection with a first transverse sliding block (35), and the second transmission screw rod (34) is in threaded connection with a second transverse sliding block (36).
4. A bus overvoltage protection device for a magnetic levitation centrifuge as claimed in claim 3, the bus overvoltage protection mechanism (3) comprises a first metal sheet pin (37), a second metal sheet pin (38), a telescopic spring (39) and a telescopic guide post (310), a first sheet metal pin (37) is connected to the first traverse sliding block (35), a second sheet metal pin (38) is connected to the second traverse sliding block (36), the first metal sheet pin (37) and the second metal sheet pin (38) both penetrate through the fixed inner shell (31) and extend to the outer side of the fixed outer shell (1), the first metal sheet pin (37) and the second metal sheet pin (38) are also connected with a telescopic guide post (310) through a telescopic spring (39), and the two ends of the telescopic spring (39) and the telescopic guide column (310) are respectively connected to the side surfaces of the first metal sheet pin (37) and the second metal sheet pin (38).
5. The bus overvoltage protection device of the magnetic suspension centrifuge as claimed in claim 4, characterized in that the output end of the smoke sensor (4) is electrically connected with the input end of a bus overvoltage detection microprocessor (25), the output end of the bus overvoltage detection microprocessor (25) is electrically connected with the input end of the audible and visual alarm (5), and the output end of the bus overvoltage detection microprocessor (25) is also electrically connected with the input end of the biaxial drive motor (32).
6. The bus overvoltage protection device of the magnetic suspension centrifuge as claimed in claim 5, wherein the first traverse slide (35) and the second traverse slide (36) are both provided with a guide slide (351), the guide slide (351) is embedded in the fixed inner housing (31), the inner wall of the fixed inner housing (31) is provided with a first linear guide chute (311) for the guide slide (351) to traverse, and the guide slide (351) is adapted to the first linear guide chute (311).
7. The overvoltage protection device for the bus of the magnetic suspension centrifuge as claimed in claim 6, wherein the top of the fixed inner housing (31) is provided with a second bar-shaped guide chute (312) for the first metal sheet pin (37) and the second metal sheet pin (38) to move transversely, the first metal sheet pin (37) and the second metal sheet pin (38) are both adapted to the second bar-shaped guide chute (312), and the first metal sheet pin (37) and the second metal sheet pin (38) are both connected to the AD sampler (21) through wires.
8. The bus overvoltage protection device of the magnetic suspension centrifuge as claimed in claim 7, wherein the first metal sheet pin (37) and the second metal sheet pin (38) are fixed on the top of the first traverse slider (35) and the second traverse slider (36) respectively through long bolts (6) and through butterfly nuts (61).
9. The overvoltage protection device for the bus of the magnetic suspension centrifuge as claimed in claim 8, wherein the top of each of the first traverse slider (35) and the second traverse slider (36) is provided with a mounting groove (352) for mounting the first metal sheet pin (37) and the second metal sheet pin (38), respectively, and the first metal sheet pin (37) and the second metal sheet pin (38) are adapted to the mounting grooves (352).
10. An implementation method of the overvoltage protection device for the bus of the magnetic suspension centrifuge as claimed in claim 9, characterized by comprising the following steps:
s1: the AD sampler (21) samples the bus voltage of the magnetic suspension centrifuge, processes the bus voltage through the digital signal amplification and filtration processor (22), and transmits processed signal information to the bus overvoltage detection microprocessor (25);
s2: comparing the transmitted signal information with an information value stored in a bus overvoltage threshold storage module (23) through a bus overvoltage detection comparison module (24);
s3: if the transmitted signal information is higher than the bus overvoltage threshold value, the bus overvoltage detection microprocessor (25) controls the double-shaft driving motor (32) to start;
s4: the double-shaft driving motor (32) drives the first transmission screw rod (33) and the second transmission screw rod (34) to rotate so that the first metal sheet pin (37) and the second metal sheet pin (38) move reversely, the first metal sheet pin (37) and the second metal sheet pin (38) are far away, and a closed loop is opened;
s5: the smoke sensor (4) detects the smoke condition in real time, and if the smoke is too large, the bus overvoltage detection microprocessor (25) controls the audible and visual alarm (5) to give an audible and visual alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110485865.1A CN113315097A (en) | 2021-04-30 | 2021-04-30 | Bus overvoltage protection device of magnetic suspension centrifuge and implementation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110485865.1A CN113315097A (en) | 2021-04-30 | 2021-04-30 | Bus overvoltage protection device of magnetic suspension centrifuge and implementation method thereof |
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| CN113315097A true CN113315097A (en) | 2021-08-27 |
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| CN202110485865.1A Pending CN113315097A (en) | 2021-04-30 | 2021-04-30 | Bus overvoltage protection device of magnetic suspension centrifuge and implementation method thereof |
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Application publication date: 20210827 |