龙虾的英文-子弹头列车
本科毕业设计(论文)通过答辩
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本科毕业设计(论文)通过答辩
附件
1
:外文原文
Gear features and functions
Abstract
Gears
in
the
mechanical
equipment
to
achieve
an
integral,
it
is
a
lot
of superior
performance. The appropriate gear and reasonable
use of
transmission
gears
can
improve
equipment
performance
but
also
could
prolong gear life.
Keywords
Gear, characteristics,
fault, application
Wheel
gear's
spreading
to
move
is
a
the
most
wide
kind
of
the
application
spreads
to
move
a
form
in
the
modern
main
advantage BE
1 spreads to move to settle, work than
in a moment steady, spread
to
move
accurate
credibility,
can
deliver
space
arbitrarily
sport
and
the
motive of
the of two stalks
;
Power and
speed scope
2 applies are
wide
;
3 spreads
to move an efficiency high,
η
=0.92-0.98
;
4
work is dependable, service life
long
;
5 Outline
size outside the is small, structure tightly
wheel gear constituted
to°;
;
;
from wheel
gear, stalk, bearings and box
body
decelerates a machine, useding for prime mover and
work machine or
performance
organization
of,
have
already
matched
to
turn
soon
and
deliver
a function of turning , the application
is extremely extensive in the
本科毕业设计(论文)通过答辩
modern machine.
6 Local
deceleration
machine
much
with
the
wheel
gear
spread
to
move,
the pole
spread to move for lord, but widespread exist
power and weight
ratio small, or spread
to move ratio
big but the
machine efficiency lead
a
low
are
also
many
weaknesses
on
material
quality
and
craft
level
moreover, the especially large deceleration
machine's problem is
more outstanding,
the service life isn't deceleration machine
of
abroad,
with
Germany,
Denmark
and
Japan
be
placed
in
to
lead
a
position,
occupying
advantage
in
the
material
and
the
manufacturing
craft
specially,
decelerating
the
machine
work
credibility
like,
service
life
it
spreads to move a form to
still take settling stalk wheel gear to spread
to move as lord, physical volume and
weight problem, don't also resolve
like
The
direction
which
decelerates
a
machine
to
is
the
facing
big
power
and
spread
to
move
ratio,
small
physical
volume,
high
machine
efficiency
and
service
life
to
grow
greatly
nowadays
rating
the
connecting
of
machine
and
electric
motor
body
structure
is
also
the
form
which
expands
strongly,
and
have
already
produced
various
structure
forms
and various products of power model
close to ten several in
the last
yearses, control a technical development because
of the modern
calculator technique and
the number, make the machine process accuracy,
process
an
efficiency
to
raise
consumedly,
pushed
a
machine
to
spread
the
diversification of movable property
article thus, the mold piece of the
whole machine kit turns, standardizing,
and shape design the art turn,
making
product
more
fine,
the
beauty
turns.
Become
a
set
a
machine
material
In 21
centuries medium, the wheel gear is still a
machine to spread
a
dynamic
basic
tool
machine
and
the
craft
technical
development,
pushed a
machine to spread to move structure to fly to
develop
spreading to move the
electronics control, liquid in the system design
to
press
to
spread
to
move,
wheel
gear,
take
the
mixture
of
chain
to
spread
本科毕业设计(论文)通过答辩
to
move,
will
become
become
soon
a
box
to
design
in
excellent
turn
to
spread
to move a combination
of academics that is in spread move
the
design
crosses,
will
become
new
spread
a
movable
property
article
the
important
trend
of
the
development.
Is
the
use
of
gear
teeth
of
two
gears
meshing
each
other
transmission
of
mechanical
power
and
motion
transmission.
According
to
the
relative
position
of
the
gear
axis
parallel
to axis of
cylindrical sub-gear drive, bevel gear axis
intersect and
cross-axis helical drive
gear. Compact structure, high efficiency, long
life
and
so
on.
Gear
refers
to
the
main,
driven
wheel
gear
direct,
movement
and power transmission devices. Of all
the mechanical transmission, the
most
widely
used
gear
can
be
used
to
transfer
between
any
two
axes
of
motion
and power.
The
characteristics of gear is: a smooth gear
transmission, the
transmission ratio
accurate, reliable, high efficiency, long life,
the
use of power, speed and size range.
For example, transmission of power
from
small to almost 100,000 kilowatts; speeds of up to
300m / s; gear
diameter
from
a
few
millimeters
to
more
than
20
meters.
However,
the
need
for
specialized
gear
manufacturing
equipment,
the
meshing
noise
transmission.
Gear
failure
for
the
five
forms,
should
be
the
appropriate
design
criteria
established.
However,
tooth
wear,
plastic
deformation
and
so on, as they have not been widely
established and well-established
engineering practice to use the
calculation method and design data, so
the
gear
drive
design,
it
is
usually
only
on
the
guarantee
that
the
tooth
root
bending
fatigue
strength
and
tooth
surface
to
ensure
contact
fatigue
strength
calculation
of
the
two
criteria.
For
high-power
high-speed
gear
transmission (such as aero-engine main
drive, drive turbine-generator
unit,
etc.),
but
also
ensure
the
tooth
surface
by
the
anti-bonding
capacity
calculation guidelines. As for the ability to
resist other
failure,
although
generally
not
at
present
be
calculated,
but
the
measures
本科毕业设计(论文)通过答辩
to be taken to strengthen the tooth's
ability to resist these failures.
1
closed gear transmission Informed by practice, in
the closed gear
transmission, usually
to ensure that the main tooth contact
fatigue
strength.
Tooth
surface
hardness
for
high
strength
and
low
core-
tooth
gear
(such as 20,20 Cr
steel by quenching after carburizing gears) or a
more
brittle material of the gear,
usually at the tooth root bending fatigue
strength to ensure that the main. If
the two gears are hardened and the
tooth
surface
hardness
as
high
as,
then
as
the
case
may
be.
Larger
transmission
power,
such
as
the
input
power
of
75kW
closed
more
than
gear,
heat,
easy to lead to bad lubrication and gear damage,
such as glue, in
order
to
control
the
temperature
rise,
but
also
for
calculation
of
cooling
capacity.
2 open-gear
transmission
Open
(semi-open)
gear
drive,
according
to
tooth
surface
is
supposed
to
be
based
to
ensure
that
anti-wear
and
anti-fracture
ability Dedendum two criteria are
calculated, but as mentioned earlier,
on the tooth surface abrasion
resistance of the method of calculating
capacity is not perfect yet, so off-
type (semi-open) gear drive, the
current only to ensure that the tooth
root bending fatigue strength as
a
design criteria. In order to extend the open
(semi-open) the life of
gear, the
specific needs of visualization to be obtained by
increasing
the appropriate modulus.
Reducer is the prime mover with an independent
closed between the work gear to reduce
speed and to increase torque. In
addition,
in
some
occasions,
there
are
devices
used
for
growth,
and
known
as the accelerator.
When the motor output shaft speed input from the
initiative,
the
drive
pinion
rotation,
and
the
drive
pinion
gear
movement,
and
a
large
number
of
teeth
than
the
gear
pinion,
and
the
speed
ratio
gear
pinion
slow,
then
the
shaft
gear
(
output
shaft)
output,
which
has
played
the
role
of
output
slowdown.
Reducer
of
the
type,
variety,
many
types
have
been formulated for the trip (the
country) the subject of more than 40
本科毕业设计(论文)通过答辩
kinds
of
reducer.
Reducer
is
based
on
the
type
of
gear
used,
tooth
profile
curve
divided;
reducer
species
is
based
on
the
use
of
the
different
needs
of the reducer
structure; the type of reducer in the basic
structure of
the
tooth
surface,
based
on
hardness,
transmission
level,
the
shaft
type,
assembly
type,
installation
type,
connection
type
and
other
factors
designed reducer
different characteristics. Reducer connected with
the
work load of the state of more
complex machines, a great impact on the
speed reducer is a reducer selection
and calculation of an important
factor
in the load reducer that is the work of the state
machine (from
the motives) of the load,
and is usually divided into three categories:
1 uniform
load;2 Medium
impact
load;
3
strong
impact
load.
Mechanical
aspects of the
slowdown in the devices typically are:
1 for
the
speed
is
relatively
small,
less
torque
on
the
gear
drive
system
- ranging from a pair of gear teeth
(speed) or a range of gear teeth
(
variable speed). Large number of teeth for which
the driving wheel, a
large number of
teeth used for the driven wheel.
2
for
speed
is
relatively
small,
a
larger
torque
on
the
gear
drive
system
- a
screw and a gear. Screw driving force with which
to make decisions.
If the gear teeth
for N, while rotating around each gear, screw on
the
ring must be rotating N.
3 for the speed ratio, and torque
transmission on a large turbine vice
-
a
rod
and
a
vortex
turbine.
Used
to
decide
under
which
vortex
dynamics.
If the turbine for the number of teeth
N, while rotating around each
turbine,
vortex
must
be
rotating
N
pole
lap.
Air
power
plant
is
typically
used for turbine
Vice reducer.
Its role is to:
1 deceleration
at
the
same
time
increase
the
output
torque,
torque
output
by
motor
output
by
the
ratio
of
reduction
ratio,
but
bearing
in
mind
that
do not
exceed the rated torque reducer.
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
龙虾的英文-子弹头列车
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