Description

Purpose. The automated laboratory complex (hereinafter referred to as ALC) is designed to carry out a set of theoretical, practical and laboratory work in the general technical disciplines “Machine Parts”, “Theory of Machines and Mechanisms” and “Technical Mechanics” in the training of mechanical specialists in institutions of higher and secondary vocational education.

Description. The ALC must be made in the form of a desktop structure consisting of the following main components: base, rotor with disks, drive, sensor system, control panel. The rotor must be a shaft on which five aluminum disks are freely mounted at a fixed distance from each other. Counterweights should be located on the outer disks. The three middle discs should serve to accommodate unbalanced weights. All disks must be equipped with a hub with screws to secure the disk to the rotor shaft at a certain angle. The magnitude of the fixation angle should be determined by the verniers rigidly fixed to the rotor shaft. The disks must have radial grooves for securing loads. The required distance for securing the loads from the rotor axis is determined on a scale. The rotor shaft must be installed in bearing supports. One support must be able to move and be supported by springs. The rotor must rotate from an electric motor through a friction transmission. The electric motor must be controlled using a frequency converter using IGBT transistors. The rotor must be equipped with a rotation angle sensor (encoder). The moving end of the rotor must be equipped with an amplitude sensor. The control panel must contain controls for the drive motor. Inside the control panel there should be a controller that provides independent processing of information from sensors, transmission of information to a computer and display of the processed information on the LCD display. The controller is an analog-to-digital converter made on an electronic board based on a PIC-type controller. The control panel must have a liquid crystal display that displays the following values in real time: rotor shaft rotation speed; amplitude value. Data entering the computer must be processed using special software “TMM 5.2”. The software must provide the ability to display instantaneous sensor values in real time. Also, the software should display in real time graphs of the amplitude as a function of the rotor shaft rotation speed, the rotor shaft rotation angle and time. The choice of which graph to display is determined by the user. The software must be able to print the obtained experimental data. In the manufacture of the laboratory complex, new components, parts and materials not previously used must be used. The front part of the control panel must be made of 2.5 mm thick aluminum sheet with metallographic markings. The specified design of the complex with the equipment described above should ensure the implementation of the following list of laboratory work by a group of students of 2…4 people:
— static (partial) rotor balance;
— dynamic (full) balance of the rotor.
Composition: Automated laboratory complex “Static and dynamic balancing of rotating links of mechanisms and machines” in accordance with the description; laptop; passport; guidelines for performing laboratory work.

Specifications:
1 Electric motor 1 piece:
– nom. electric motor power, no more, W 180
– nom. rotation speed, not less, min–1 1500
– supply voltage, not less than 380 V
2 Set of constant mass loads for creating imbalance and balancing, g 20, 30, 40, 50, 60 and 70
3 Power supply of the laboratory complex:
— stand supply voltage, V, type of current, frequency, Hz 220, variable, 50
— maximum power consumption, no more, W 300
4 Dimensions of the laboratory complex, no more, mm 800x600x350
5 Weight of the laboratory complex, no more, kg 150
6 computers (laptop), or equivalent in characteristics, at least Windows 10 operating system.