RU211880U1 - DEVICE FOR ADJUSTING THE SENSOR UNIT OF THE MAGNETIC SUSPENSION CONTROL SYSTEM - Google Patents

Abstract

The utility model relates to structures used in the field of automated process control systems, in particular, when setting up electronic control systems for magnetic suspension.

The objective of the utility model is to optimize the process of setting up a magnetic suspension control system.

EFFECT: reduced adjustment time for the sensor block of the magnetic suspension control system.

The problem is solved, and the technical result is achieved by creating a device for the simultaneous measurement of two physical quantities of stress and automatic conversion of these quantities into real values of the gaps.

The device consists of a housing in which are mounted: a central processor and display module, a step-up converter module, a battery charging control module and a lithium-ion battery. To connect the device to the measurement channels, two pairs of conductors with clamps are provided. Turning the device on and off and controlling the backlight of the display is done using the corresponding buttons on the front panel of the case. The indication provides for displaying the measured parameters on the screen, as well as the process and completion of charging the built-in power source.

To set up the magnetic suspension sensor unit, the device is connected to the corresponding terminals of the secondary converter in the junction box next to the blower. The necessary information is displayed on one display in two lines - for each axis, respectively. It is possible to power the device both from the internal battery and from an external source.

Description

The utility model relates to structures used in the field of automated process control systems (hereinafter referred to as APCS), in particular, when setting up electronic control systems for magnetic suspension (hereinafter referred to as SUMP).

As part of the gas compressor unit (hereinafter referred to as GPA) Ts25BD/100-1.35M, in contrast to traditional thrust bearings, a magnetic suspension with a microprocessor control system is used as the bearings for the blower rotor shaft [1]. In the process of setting up a system of magnetic suspension sensors, it is necessary to use two identical measuring instruments simultaneously, as well as to recalculate the voltage values from the blower rotor shaft position sensors into the corresponding clearance values, since there is no single device that combines all the necessary functions.

The existing alignment process of the magnetic suspension sensor block is shown in Fig. 1. According to clause 5.1.19. [1] it is produced in the following sequence: between the sensor block 3 and the converter block 4, located in the junction box near the centrifugal blower 1, a communication cable 2 is laid. The converter block 4 is used to convert the signals of the eddy current sensors into a unified signal with a voltage of 0 to C. Control of the position of the sensor unit 3 relative to the rotor shaft 5 is carried out by measuring the gap between them. When the rotor shaft 5 is supported on the safety bearings, the displacement of the rotor axis relative to the axis of the safety bearings, measured along the axes of the SUMP sensors, should be 0.2 ± 0.02 mm (calculated value). If the displacement values measured by the SUMP sensors differ from the calculated values, the screws 6 adjust the position of the sensor unit 3 along the axes of the SUMP sensors. The adjustment is considered completed if the SUMP determines the amount of displacement equal to 0.2 ± 0.02 mm. The control of the position of the rotor shaft 5 of the centrifugal blower 1 along two axes is carried out by factory-made devices [2].

The disadvantage of this method is its complexity, due to the need for the simultaneous use of two devices to control the position of the rotor shaft along two axes and subsequent periodic conversion of stress values into real gap values.

The objective of the utility model is to optimize the process of setting up a magnetic suspension control system.

EFFECT: reduced adjustment time for the sensor block of the magnetic suspension control system.

The problem is solved, and the technical result is achieved by creating a device for the simultaneous measurement of two physical quantities of stress and automatic conversion of these quantities into real values of the gaps.

The electrical circuit diagram of the device for aligning the magnetic suspension sensor block is shown in Fig. 2. In the housing 8 of the adjustment device 7, the following are mounted: a printed circuit board 9 with a central processor 10 placed on it, designed to measure the values of the physical quantities of stresses, digitize them and further process them for presentation in the form of the required gap values, a display module 11 for displaying information in digital-character form, power buttons 12 and display backlight control 13, a boost converter module 17 for generating a voltage of 5 volts required to power the processor and display module, a printed circuit board for controlling the charging of the built-in battery with a unified micro-USB connector 14, a lithium-ion battery 15 designed to power the device offline. To connect the device to the measurement channels, two pairs of conductors with crocodile clips are provided, at the ends of black and red colors 16.

To adjust the magnetic suspension sensor unit, the adjustment device 7 is connected by means of clamps 16 to the corresponding terminals of the secondary converter 4. After turning on the power button 12, the voltage values from the secondary converter in volts and the corresponding gaps in micrometers are displayed on the device screen. Information is displayed in two lines - for each axis, respectively. If necessary, or in conditions of work with insufficient illumination, you can turn on the backlight of the display of the device by pressing button 13. Pressing this button again turns off the backlight of the display.

It is also possible to power the device from an external source with a voltage of 5 volts through a unified micro-USB connector, from which the internal power source is also charged (a red indicator above the connector means the charging process, blue - its completion and automatic stop). Autonomous operation of the device from an internal fully charged power source is 4 hours, taking into account the activation of the display backlight.

List of sources:

1. 577.7000.000RE Operation manual for compressor 352GC2 485_75-100M (clause 5.1.19.).

2. Digital multimeter Fluke-175 [Electronic resource]. URL: https://kipia.ru/catalog/izmeritelnye-pribory/elektroizmeritelnye/cifrovoj-multimetr/Fluke/fluke-175-177 (date of access: 12/17/2019).

Claims (1)

Device for aligning the sensor block of the control system of the magnetic suspension of the rotor shaft of a centrifugal supercharger, measuring the gap between them and the rotor shaft, which is converted by the secondary converter into a voltage signal, characterized in that it consists of a housing (8), on the front panel of the housing (8) there is a power key (12), a display module (11), a display backlight control key (13), a central processor (10) is used to measure the values of physical quantities of stresses, their digitization and subsequent processing for presentation in the form of the required gap values, to connect the device two pairs of conductors with crocodile clips at the ends of black and red colors (16) are used for measurement channels, connected to the corresponding terminals of secondary converters, a boost converter module (17) is used to power the device, a display module is used to output information in digital character form (11), n connected to the central processor (10), the key (13) connected to the digital input of the central processor (10) is used to control the backlight of the display, a lithium-ion battery (15) is used to power the device in autonomous mode, charged from the charging control circuit board with a unified micro-USB connector (14) located on the lower side panel of the case (8).

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