338-0541/01 – Fluid Elements and Systems (TPaS)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 4 |
| Subject guarantor | doc. Ing. Martin Vašina, Ph.D. | Subject version guarantor | Ing. Adam Bureček, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Compulsory |
| Year | 1 | Semester | summer |
| | Study language | Czech |
| Year of introduction | 2010/2011 | Year of cancellation | |
| Intended for the faculties | USP, FS | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
Students learn more deeply with hydraulic and pneumatic components, their structures, functions, parameters, characteristics and use in hydraulic and pneumatic circuits. They know how to properly use these elements in hydraulic and pneumatic systems. In detail, students will learn the advanced control technology and servo technology in hydraulic and pneumatic actuators and mechanisms. They know the most important sources of constant pressure, and then use this knowledge to design systems with valve control. In the field of fluid power systems become familiar with key applications, ie, hydraulic and pneumatic machine drives and hydrostatic transmissions. They learn to deal with cases of start-ups and drive mechanisms, and calculate the thermal balance of fluid. They will learn the basics of reliability, operation and maintenance of fluid systems.
Teaching methods
Lectures
Tutorials
Experimental work in labs
Project work
Summary
In the first part of the course Fluid systems and components in more detail, students learn about functions, structures, parameters, characteristics, and calculated using the fluid control elements, in particular hydraulic and pneumatic proportional valves and switchboards, control valves and servo-valves. In addition, sources familiar with the problems of pressure and flow of resources, capabilities and management (control pumps, battery drives, etc.).
In the section devoted to fluid systems become familiar with the properties of selected fluid systems such as systems with batteries, with proportional valves, energy saving systems, systems with two or more motors, systems, ensuring synchronous operation of hydraulic motors, systems for handling massive loads, etc.
Acquainted with the composition of hydraulic and pneumatic drives and hydrostatic transmissions. These systems will be able to design and carry out basic calculation parameters in steady state. They will be able to solve cases of acceleration and braking actuators, and solve the thermal balance of these drives. Meet the basics of reliability, operation and maintenance of fluid systems.
The exercises practiced brand of fluid elements, measuring the static characteristics of the fluid elements on praktikátorech to verify the properties and behavior of fluid systems, practicing the theory of fluid systems, analyze typical hydraulic and pneumatic circuits in steady state solves heats, brake fluid balance and thermal systems. Propose (projects) simpler types of fluid systems.
Compulsory literature:
Recommended literature:
Additional study materials
Way of continuous check of knowledge in the course of semester
Credit: max 35, min 18 points - test (15 points), 2 projects (20 points)
Exam: oral - 2 questions (50 points) + defense of protocols (15 points)
E-learning
Other requirements
Additional requirements for the student are not.
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Syllabus of lectures:
Week Contents lectures
1th Sources of pressure and flow sources. Hydraulic power packs. Management of hydro. Control pumps and motors.
2 th Hydraulic motors and pneumomotory: structure, characteristics, efficiency, use. Seals in hydraulics.
3 th Flow control valves, flow regulators, distributors, controlled one-way valves, pressure valves.
4th Proportional valve, proportional control valves, proportional pressure valves.
5th Design of proportional distributor with regard to the dynamics of the system.
6th Servo valves. Filtration of working fluid.
7th Actuators. Dynamics of actuators. Sources of constant pressure.
8th Circuits with batteries and accumulators. Circuits for material handling loads.
9th Hydrostatic: structure, function, structural characteristics, the operating point and the drive mechanism.
10th Starting and braking and propulsion mechanism.
11th Circuits with two or more motors. Synchronous motors running.
12th The volume of fluid control actuators. Hydrostatic transmissions. Applications.
13th Valve motion control. Characteristics, comparison, applications.
14th Pneumatic control systems. Applications.
Syllabus of practicals:
Week Contents practicals and seminars
1 Repeating a hydrostatics. The pressure in the liquid. Pressure loss. Flow losses.
2 Repeat : Graphical symbols elements. Analysis of an ideal hydraulic circuit in steadystate: examples.
TEST 1: Physical properties of liquids. The pressure in the liquid. Pressure and flowloss. For the test may receive up to 10 points.
3 Basic hydraulic circuits. Demonstration on hydraulical stand.
4 Design and calculation of parameters of the hydraulic circuit is a real source of the flow in steady state.
Entering Program 1: Design and calculation of parameters of a real hydraulic circuit insteady state. To cast the program can receive up to 10 points.
5 Calculation of the parameters of the circuit flow control valves.
6 Proposal for a hydraulic circuit with proportional valve: Part 1
Entering Program 2: Design a hydraulic circuit with proportional valve. Under the program can receive up to 10 points.
7 Proposal for a hydraulic circuit with proportional valve: Part 2
8 Hydraulic stiffness. Hydraulic natural frequency with load. Effect of fluid compressibilityand leadership.
9 Transfer properties of nine controls.
10 Starting the drive.
11 Synchronous motors running: examples.
12 Circuits with accumulators: examples.
13 Pneumatic control systems: assembly of pneumatic circuits hydraulical stand.
With the active participation can receive up to 5 points.
14 Proposal for a pneumatic circuit.
Exam questions
1 Hydrostatic pumps and rotary motors: structure, properties and characteristics.
2 Linear motors: structure, properties and characteristics. Seals in hydraulics.
3 Methods of control of geometric volume converters.
4 Hydrostatic pumps: regulation at constant pressure and constant performance.
5 One-way valves. Controlled one-way valves. Bilateral hydraulic lock.
6 Directional spool valves.
7 Pressure-dependent flow control valves. Pressure independent flow control valves with two-way pressure weight.
8 Pressure valves: safety, relief, reduction. Directly controlled. Indirectly controlled.
9 Directly controlled proportional valves.
10 Indirectly controlled proportional valves.
11 Proposal proportional valve with regard to the dynamics of the system.
12 Servo valves.
13 Servo actuators - block diagram.
14 Hydraulic actuators - sources of pressure, servo motors, fluid filtration.
15 Circuits with two or more motors. Synchronous motors running.
16 Circuits with accumulators.
17 Valve control of hydrostatic and pneumatic drive. The principle, characteristics, applications.
18 Volume control of hydrostatic drive: principles, characteristics, applications. Hydrostatic transmission.
19 Steady-state drive. Torque characteristics of actuators and mechanisms. Operating point of the drive.
20 Starting and braking power.
21 Pneumatic drives: advantages and disadvantages, characteristics, parameters engines.
22 Pneumatic control systems: management options, compared to hydraulics.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction