Teoria i praktyka eksploatacji przekładni ślimakowych
Ładowanie...
Data
2006
Autorzy
Tytuł czasopisma
ISSN czasopisma
Tytuł tomu
Wydawca
Wydawnictwo Politechniki Łódzkiej
Lodz University of Technology. Press
Lodz University of Technology. Press
Abstrakt
Worm gears are used for drive transrnission as reducers. They are practically
not applicable as intensifiers.
Worm gears are characterised by great compactness of structure, which is a
consequence of the capability of achieving very large ratios, up to 70, at one
degree. Still cases of greater speed reductions at one degree are also known. The
gears can transrnit quite heavy loads, which results from the number of pairs of
teeth in a worm and a worm wheel working subsequently. The minimum number
of pairs of teeth in continuous cooperation in cylindrical worm gears usually
does not fall below 2 (Fig. 2), whereas in globoidal worm gears the number of
pairs of teeth being at the same time in the mesh can reach 5 (Fig. 2) or more.
Moreover they are silent-running.
Among the problems most frequently occurring in the process of the gear
exploitation there is a proper selection of lubricator, its amount, and the way of
complementing it as well as the frequency of its replacement. This problem
results from a serious fault characteristic for worm gears. Due to a specificity of
their teeth geometry a great amount of heat is ernitted during the work. Thus the
exploitation of the gears consists mainly in quick reception of the losses of
thermal energy in the mesh and in dissipating it as quickly as possible. In order
to offer a solution to the above problems mathematical relations, graphs, tables
and appendant drawings supported by specific examples have been included in
the paper. .
This short description already gives a clue of the difficulty of decisionmaking
on the selection of proper worm gear for drive transrnission in a given
machine or a mechanical device. A description of the course of action when
selecting a worm gear also offered in the paper can be helpful in such cases.
The paper provides a complete idea of the elastothermohydrodynarnic
lubricating theory in worm teeth as well as a complete description of
mathematical and physical relations. The whole theory has been illustrated with
an example. The considerations have also been supported by a description of
numerous experiments made on models as well as on real gears and devoted to
the type of friction taking place in the worm teeth in various exploitation
conditions.
The contents of the paper also include a complete selection of lubricating
agents, with oils and greases.
The influence of the assembling and of the gear running-in on the further
exploitation parameters has been described, with a stress placed on an important
feature of self-locking.
The current state and the perspectives of worm gears development have been
presented and further tendencies and directions in the research have been
introduced.
Opis
Red. serii : Wodziński, Piotr
Słowa kluczowe
przekładnie ślimakowe, przekładnie, worm gears, gears
Cytowanie
Sabiniak Henryk G., Teoria i praktyka eksploatacji przekładni ślimakowych.,Wydawnictwo Politechniki Łódzkiej, Łódź 2006, ISBN 83-7283-199-8.