ВУЗ:
Составители:
Рубрика:
6
The actuator consists of one or several mechanisms.
Mechanism – is a system of bodies intended for conversion of motion
of one or several bodies into the required motion of other ones.
By the functional purpose all mechanisms are subdivided into the
following kinds:
1. Mechanisms of engines and converters.
2. Transmissions.
3. Executive mechanisms (actuators).
4. Mechanisms of control and regulation.
5. Feeders, transporters, sorters of machined objects.
6. Mechanisms of the automatic count, weighing and packing.
The mechanisms which are included in the structure of a machine can
incorporate firm, liquid, gaseous bodies, electrical and magnetic devices,
which work according to the basic principles of mechanics, thermal physics,
electrical engineering and electronics.
Therefore, the Theory of Machines and Mechanisms is the science
studying the structure, kinematics and dynamics of mechanisms in
connection with their analysis and synthesis.
2. Basic concepts and definitions
All problems of the theory of mechanisms can be divided into two
groups. The first group of problems is connected with the research of
structural, kinematic and dynamic properties of mechanisms, i.e. with their
analysis. The second group of problems deals with the design of mechanisms
with the predetermined structural, kinematic and dynamic properties for
realization of required movements, i.e. with the synthesis of mechanisms.
The mechanism’s movement depends on their structure and applied
forces. Therefore, in the study of the theory of mechanisms, it seems to be
convenient to divide all problems of mechanisms’ analysis into two parts:
1. Structural and kinematic analysis.
2. Dynamic analysis of mechanisms.
The purpose of structural and kinematic analysis of mechanisms is to
study the mechanism’s structural theory and research the motion of
mechanisms from the geometrical point of view, without the consideration of
the forces causing this motion.
The purpose of dynamic analysis is to study the methods of force
definition, acting on the elements, forming a mechanism during their motion,
and to study the interrelation between the motion of the elements, their
masses and acting forces.
Страницы
- « первая
- ‹ предыдущая
- …
- 4
- 5
- 6
- 7
- 8
- …
- следующая ›
- последняя »
