The program of lectures
Week Lectures
1 Mechanism, drive, transfer. Machines drives: comparison, the characteristics of M-n. Load characteristics of machines Mz-nz. Operating point of drive and mechanism. Applications: windlass, lift, trolleys mobile machines, presses, calenders, wind plants, winding machine.
2 Comparison of the drives in terms of eduction of motion, control motion, dimensions engine, dynamic characteristics, efficiency, operation and service cost. Starting and brake hydraulic drive. Applications: drives of bagger, drive of working machine, manipulators.
3 Control of hydraulic drive
a) the volume control: regulation pumps and motors. Applications of volume control: hydraulic aggregate, drive of construction elevator, drive of blast mixer. Hydrostatic transmission and its application in mobile machines. Hydraulics in iron-mill: tilting furnaces, vacuum equipment.
4 Control of hydraulic drive
b) valve control: Control by classically valves and distributor. Control of the motion direction of hydro motor and stop of hydro motor. Material handling load. Hydraulic mechanisms for water works. Lock. Tipping bridges. Alternatively you can tour the factory premises.
5 Control of hydraulic drive
b) valve control: Momentum M-n characteristics of rotation hydraulic drive, F–v characteristic of linear hydraulic drive, measuring M-n characteristics drive. Applications: lifts, hoists, windlass, lift, cranes. Turners.
6 Control of hydraulic drive
b) valve control:
Fundamentals of proportional technology. Elements of proportional techniques: proportional distributor and valves. Application of proportional technology: hydraulic systems of mobile equipment body.
7 Control of hydraulic drive
b) valve control:
Application of proportional techniques: manipulator, mechanisms of cell bodies machines, hydraulic mechanisms in iron-mill, hydraulic mechanisms in theaters, testing.
8 Control of hydraulic drive
b) valve control:
Servomechanisms. Electrohydraulic servomechanisms speed and position in robots, machine tools, aircraft, military technology. Track of servomechanism. Servo elements and their properties: servo valves, servo motor, sensors, regulators. Electrohydraulic servomechanisms in thermal and nuclear power.
9 Built-in valves
Construction, characteristics, types of built-in valves, circuits with built-in valves. Applications: presses, forging presses.
10 Hydraulic motors with accumulators
Design and calculation of accumulator drive, design and calculation of accumulator, applications of accumulator drive. Application: the equipment for continuous casting of steel, hydraulic shears, hydraulic presses.
11 Multi-engine drives. Synchronous motors running.
Characteristics properties of a multi-engine drive (linear, rotary) ensure synchronous operation of two or more hydraulic motors. Applications: water works; stage equipment, lifting equipment, traversing of vehicle and functions differ.
12 Heat balance of the hydraulic drive
Thermal calculation of hydraulic circuit, design of cooler, energy-saving drives and their p-Q characteristics. Applications: hydraulic steelworkers continuous casting, secondary metallurgy, rolling mills.
13 Energy-saving systems
LS (load sensing) with an open center, closed center, secondary control of hydro motors. Applications: energy-saving hydraulic aggregate, energy-saving systems in testing.
14 The working fluid of hydraulic systems
Hardly flammable working fluid. Hydraulic machinery of mechanisms in underground mines. Tunneling equipment. Special operating conditions activities, intrinsic safety requirements. Environmentally friendly working fluid. Hydraulics for agricultural and forestry machinery.
Program of exercises and seminars + individual students' work
Week Filling exercises and seminars
1-2 Repeat the basic relationship of fluid mechanics and fluid mechanisms. Liquid viscosity, liquid compressibility. Operating point of drive and mechanism.
3-4 Starting and braking hydraulic drive.
5-6 Proposal of drive for lifting mechanism with a hydraulic actuator (arm of bagger, crane, windlass, etc.) including specification of elements. Static characteristics of rotation hydraulic drive. Static characteristics of linear and rotation hydraulic drive for variable speed control
resistor (throttle valve). The overall efficiency of the drive. Program No. 1: Proposal drive of lifting mechanism with a hydraulic drive (arm excavator, crane, windlass, etc.) including specification elements. The program can receive up to 10 points
7-8 Proposal of dimensions of hydraulic lines and the calculation of pressure losses in the system. Alternatively: Excursion to the plant operating hydraulic equipment.
9-10 Proposal of hydrostatic transmission of mobile machines. Design and solution structure of hydraulic circuits for synchronizing the movement and speed.
11-12 Proposal and calculation of the accumulator. Program No.2: Proposal of accumulator drive for manipulator. The program can receive up to 10 points
13-14 Energy balance of hydraulic system. Thermal calculation, cooling and cooler design. Test 1: Basic relationship for calculating the pressure loss, power loss, heat balance of the circuit, the relationship between input and output parameters hydro generators and hydro motors, the relationship for flow throught throttle. The test may receive up to 15 points.
List of questions to exam
1. Draw a M-n characteristics of electrical, hydraulic and pneumatic drive. Draw Mz-nz characteristics of working mechanisms. The proposal of drive on the base of position working point.
2 Starting the drive.
3 Compare the drives in terms of how to eduction of movement and control motion.
4 Compare the drive on the engine size, dynamics properties, efficiency, operation and service, cost.
5 Basic relationship for control speed of the motion by variable resistor - derivation of the static characteristics Mn rotation drive.
6 Derive the equation F-v characteristics of drive with linear hydraulic motor controlled by variable resistor.
7 Multi-engine drives and synchronous motors running.
8 Circuits for lifting, lowering and flipping massive load.
9 Drive of mobile machines. Hydrostatic transmission.
10 Low-speed radial piston hydraulic motors: structural cut, parameters.
11 Regulation pumps: possibility of control geometrical volume.
12 Built-in valves and their uses.
13 Proportional valves and distributors: construction, characteristics, use.
14 Types of accumulator, proposal and calculation of accumulator.
15 Using the accumulator in the circuit.
16 Positional servomechanism: block diagram, definition, function description, achieved precision positioning requirements for cleanliness, energy balance.
17 Elements of position servomechanism: servo valves.
18 Elements of position servomechanism: hydro motors, sensors, controllers.
19 Types and properties of hardly inflammable working liquids.
20 Types and properties of environmentally friendly working fluids.
Week Lectures
1 Mechanism, drive, transfer. Machines drives: comparison, the characteristics of M-n. Load characteristics of machines Mz-nz. Operating point of drive and mechanism. Applications: windlass, lift, trolleys mobile machines, presses, calenders, wind plants, winding machine.
2 Comparison of the drives in terms of eduction of motion, control motion, dimensions engine, dynamic characteristics, efficiency, operation and service cost. Starting and brake hydraulic drive. Applications: drives of bagger, drive of working machine, manipulators.
3 Control of hydraulic drive
a) the volume control: regulation pumps and motors. Applications of volume control: hydraulic aggregate, drive of construction elevator, drive of blast mixer. Hydrostatic transmission and its application in mobile machines. Hydraulics in iron-mill: tilting furnaces, vacuum equipment.
4 Control of hydraulic drive
b) valve control: Control by classically valves and distributor. Control of the motion direction of hydro motor and stop of hydro motor. Material handling load. Hydraulic mechanisms for water works. Lock. Tipping bridges. Alternatively you can tour the factory premises.
5 Control of hydraulic drive
b) valve control: Momentum M-n characteristics of rotation hydraulic drive, F–v characteristic of linear hydraulic drive, measuring M-n characteristics drive. Applications: lifts, hoists, windlass, lift, cranes. Turners.
6 Control of hydraulic drive
b) valve control:
Fundamentals of proportional technology. Elements of proportional techniques: proportional distributor and valves. Application of proportional technology: hydraulic systems of mobile equipment body.
7 Control of hydraulic drive
b) valve control:
Application of proportional techniques: manipulator, mechanisms of cell bodies machines, hydraulic mechanisms in iron-mill, hydraulic mechanisms in theaters, testing.
8 Control of hydraulic drive
b) valve control:
Servomechanisms. Electrohydraulic servomechanisms speed and position in robots, machine tools, aircraft, military technology. Track of servomechanism. Servo elements and their properties: servo valves, servo motor, sensors, regulators. Electrohydraulic servomechanisms in thermal and nuclear power.
9 Built-in valves
Construction, characteristics, types of built-in valves, circuits with built-in valves. Applications: presses, forging presses.
10 Hydraulic motors with accumulators
Design and calculation of accumulator drive, design and calculation of accumulator, applications of accumulator drive. Application: the equipment for continuous casting of steel, hydraulic shears, hydraulic presses.
11 Multi-engine drives. Synchronous motors running.
Characteristics properties of a multi-engine drive (linear, rotary) ensure synchronous operation of two or more hydraulic motors. Applications: water works; stage equipment, lifting equipment, traversing of vehicle and functions differ.
12 Heat balance of the hydraulic drive
Thermal calculation of hydraulic circuit, design of cooler, energy-saving drives and their p-Q characteristics. Applications: hydraulic steelworkers continuous casting, secondary metallurgy, rolling mills.
13 Energy-saving systems
LS (load sensing) with an open center, closed center, secondary control of hydro motors. Applications: energy-saving hydraulic aggregate, energy-saving systems in testing.
14 The working fluid of hydraulic systems
Hardly flammable working fluid. Hydraulic machinery of mechanisms in underground mines. Tunneling equipment. Special operating conditions activities, intrinsic safety requirements. Environmentally friendly working fluid. Hydraulics for agricultural and forestry machinery.
Program of exercises and seminars + individual students' work
Week Filling exercises and seminars
1-2 Repeat the basic relationship of fluid mechanics and fluid mechanisms. Liquid viscosity, liquid compressibility. Operating point of drive and mechanism.
3-4 Starting and braking hydraulic drive.
5-6 Proposal of drive for lifting mechanism with a hydraulic actuator (arm of bagger, crane, windlass, etc.) including specification of elements. Static characteristics of rotation hydraulic drive. Static characteristics of linear and rotation hydraulic drive for variable speed control
resistor (throttle valve). The overall efficiency of the drive. Program No. 1: Proposal drive of lifting mechanism with a hydraulic drive (arm excavator, crane, windlass, etc.) including specification elements. The program can receive up to 10 points
7-8 Proposal of dimensions of hydraulic lines and the calculation of pressure losses in the system. Alternatively: Excursion to the plant operating hydraulic equipment.
9-10 Proposal of hydrostatic transmission of mobile machines. Design and solution structure of hydraulic circuits for synchronizing the movement and speed.
11-12 Proposal and calculation of the accumulator. Program No.2: Proposal of accumulator drive for manipulator. The program can receive up to 10 points
13-14 Energy balance of hydraulic system. Thermal calculation, cooling and cooler design. Test 1: Basic relationship for calculating the pressure loss, power loss, heat balance of the circuit, the relationship between input and output parameters hydro generators and hydro motors, the relationship for flow throught throttle. The test may receive up to 15 points.
List of questions to exam
1. Draw a M-n characteristics of electrical, hydraulic and pneumatic drive. Draw Mz-nz characteristics of working mechanisms. The proposal of drive on the base of position working point.
2 Starting the drive.
3 Compare the drives in terms of how to eduction of movement and control motion.
4 Compare the drive on the engine size, dynamics properties, efficiency, operation and service, cost.
5 Basic relationship for control speed of the motion by variable resistor - derivation of the static characteristics Mn rotation drive.
6 Derive the equation F-v characteristics of drive with linear hydraulic motor controlled by variable resistor.
7 Multi-engine drives and synchronous motors running.
8 Circuits for lifting, lowering and flipping massive load.
9 Drive of mobile machines. Hydrostatic transmission.
10 Low-speed radial piston hydraulic motors: structural cut, parameters.
11 Regulation pumps: possibility of control geometrical volume.
12 Built-in valves and their uses.
13 Proportional valves and distributors: construction, characteristics, use.
14 Types of accumulator, proposal and calculation of accumulator.
15 Using the accumulator in the circuit.
16 Positional servomechanism: block diagram, definition, function description, achieved precision positioning requirements for cleanliness, energy balance.
17 Elements of position servomechanism: servo valves.
18 Elements of position servomechanism: hydro motors, sensors, controllers.
19 Types and properties of hardly inflammable working liquids.
20 Types and properties of environmentally friendly working fluids.