338-0544/01 – Fluid Systems of Mobile Machines (TSMZ)
| Gurantor department | Department of Hydromechanics and Hydraulic Equipment | Credits | 4 |
| Subject guarantor | doc. Ing. Martin Vašina, Ph.D. | Subject version guarantor | doc. Ing. Martin Vašina, Ph.D. |
| Study level | undergraduate or graduate | Requirement | Choice-compulsory |
| Year | 2 | Semester | winter |
| | Study language | Czech |
| Year of introduction | 2011/2012 | Year of cancellation | 2020/2021 |
| Intended for the faculties | USP | Intended for study types | Follow-up Master |
Subject aims expressed by acquired skills and competences
The course Fluid Systems students gain mobile enhanced knowledge of the hydrostatic drive transmission and mobile machines. Become familiar with specific requirements for mobile hydraulic machinery and equipment. Knowledge of the working fluid of hydraulic circuits applied in the design of appropriate working fluids of hydraulic systems of mobile devices. Fundamentals of hydrostatics applied in the design of brake systems, knowledge bases for the theory of drives applied in the design of hydrostatic transmissions and drive upgrades mobile machines, hydrostatic transmission theory of knowledge applied in the design and calculation of the hydrostatic transmission of mobile machines. They can calculate the pressure loss in hydraulic circuits of mobile equipment, can start to solve the hydrostatic drive, can solve even difficult cases of dynamic phenomena in the hydrostatic system of mobile machines. Acquainted with the possibilities of modern management of hydrostatic transmissions, such as proportional control and power steering. Can not perform an analysis of the dynamic behavior of hydraulic system, mobile devices, but also the synthesis of a hydraulic system for simpler applications.
Teaching methods
Lectures
Tutorials
Project work
Summary
The course Fluid Systems students gain mobile enhanced knowledge of hydrostatic drives and transmissions for mobile machinery. It builds on the subjects while Fluid Mechanics, Fluid Mechanisms, Fluid systems and components, as well as other subjects. Knowledge gained in these courses apply to fluid systems of mobile devices. They are primarily hydraulic motors drive mobile machines, hydrostatic transmissions, hydraulic power steering, brake systems including ABS, hydraulic damping systems, vehicles, hydrostatic systems upgrades mobile machinery, lubrication systems, hydrodynamic torque converter clutch, etc. Through lectures acquainted with volume control hydrostatic drive and transfer, and the issue of proportional control of hydrostatic drives upgrades of mobile devices. Fundamentals of dynamics are applied to the hydraulic systems of mobile devices. Mentioned issues will be at practice examples through exercises, and also by individual projects.
Compulsory literature:
GOETZ, W. Hydraulics. Theory and Applications. Ditzingen: OMEGON, 1998. 291 s. ISBN 3-980-5925-3-7.
Recommended literature:
Way of continuous check of knowledge in the course of semester
2x Samostatný projekt
1x Test
E-learning
Other requirements
Additional requirements for students are not .
Prerequisities
Subject has no prerequisities.
Co-requisities
Subject has no co-requisities.
Subject syllabus:
Syllabus of lectures:
1st Specific requirements for mobile hydraulics equipment. The working fluid in hydraulic circuits of mobile machines. Motor, gear, bearing and hydraulic oils.
2nd Lubricating systems, vehicles, chassis lubrication, greases.
3rd Hydrostatic and pneumatic brakes and brake systems. ABS systems.
4th Hydrostatic and pneumatic actuators. The composition of the drive. Co-operation and working the drive mechanism. Torque characteristics of the drive and the working mechanism. The working point of the drive.
5th Starting and braking of the drive and the working mechanism.
6th Volume control drive. Hydrostatic transmission. Song transfer. Control hydrostatic transmission. Characteristics of the hydrostatic transmission.
7th Multi-engine drives drive mobile machines. Implementation of differential function in parallel embossed motors. Providing synchronous operation of two or more hydraulic motors.
8th Hydrostatic drives upgrades of mobile machines. Sectional and monobloc cabinet, classic controllers in mobile hydraulics.
9th Proportional hydraulic control systems of mobile machines.
10th And electrohydraulic servo mechanickohydraulické. Servo direction of travel of the vehicle.
11th Dynamic phenomena in the hydraulic system: pulse pressure and flow, its own vibrations, hydraulic shock.
12th Noise hydraulic elements, methods of reducing noise. Eliminating vibration and pulsation. Liquid damping and shock.
13th Mathematical description of dynamic properties of hydraulic and electrohydraulic components. Simulation of the dynamic behavior of hydraulic system.
14th Hydrodynamic torque converter, hydrodynamic clutches, hydrodynamic brakes.
Exercises outline:
1st Repeat the foundations of hydrostatics, flow bases, graphical symbols hydraulic elements, drawing diagrams of hydraulic circuits.
2nd Hydraulic drives mobile machines presentation.
3rd Design a working fluid for the hydraulic system of a car, mobile work machines. Demonstration of a lubrication system in the laboratory department.
4th Examples of the compressibility of the working fluid. Design brake system with regard to the compressibility of the working fluid.
Test No. 1: Basics of hydrostatics, basic flow, graphical symbols elements. For the test may receive up to 10 points.
5th Design hydraulic actuator with respect to the position of working point: examples.
6th Starting a hydraulic drive mechanism: examples.
7th Entering the program No. 1: Design of hydrostatic transmission of mobile machines. Under the program can receive up to 10 points.
8th Multi-engine drives: examples.
9th Entering the program No. 2: Design of mobile trucks drive machines with proportional control. Under the program can receive up to 15 points.
10th Design of proportional switchboard: examples.
11th Calculation of pressure losses in the hydraulic system of the body mobile machines.
12th Vibrations in the hydraulic system: examples.
13th Simulation model of a hydraulic system with proportional control.
14th Simulation model of an electrohydraulic actuator.
Exam Questions:
1st The working fluid in hydraulic circuits of mobile machines. Motor, gear, bearing and hydraulic oils.
2nd Lubricating systems, vehicles, chassis lubrication, greases.
3rd Hydrostatic brakes and brake systems. ABS systems.
4th The composition of the drive. Co-operation and working the drive mechanism. Torque characteristics of the drive and the working mechanism. The working point of the drive.
5th Starting and braking of the drive and the working mechanism.
6th Hydrostatic transmission. Song transfer. Cooling hydrostatic transmission.
7th Control hydrostatic transmission. Characteristics of the hydrostatic transmission.
8th Multi-engine drives drive mobile machines. Implementation of differential function in parallel embossed motors.
9th Providing synchronous operation of two or more hydraulic motors.
10th Hydrostatic drives upgrades of mobile machines. Sectional and monobloc cabinet, classic controllers in mobile hydraulics.
11th Proportional hydraulic control systems of mobile machines.
12th And electrohydraulic servo mechanickohydraulické. Servo direction of travel of the vehicle.
13th Dynamic phenomena in the hydraulic system: pulse pressure and flow, its own vibrations, hydraulic shock. Eliminating vibration and pulsation. Liquid damping and shock.
14th Mathematical description of dynamic behavior of hydraulic motors with massive loads.
15th Mathematical description of dynamic behavior of proportional hydraulic control elements.
16th Hydrodynamic clutches, hydrodynamic brakes.
Conditions for subject completion
Occurrence in study plans
Occurrence in special blocks
Assessment of instruction
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