缈昏瘧鍘熸枃
1
Lesson11
Designs of Machine Components-Bearings
A
bearing
is
a
support
system
for
rotating,
oscillating,
or
translating machine elements, in which friction has been greatly
reduced.
Since
it
has
been
estimated
in
various
studies
that
on
the
average
about
30%
of
all
mechanically
transmitted
energy
are
lost
to
friction,
an
understanding
of
friction
phenomena
in
bearings is essential to the machine designer.
杞存壙鏄竴涓敤浜庢棆杞紝
鎽嗗姩锛?/p>
鎴栫Щ鍔ㄦ満鏋勪腑澶уぇ闄嶄綆鎽╂摝鐨?/p>
鏀寔绯荤粺銆?/p>
鎹悇椤圭爺绌朵腑浼拌锛?/p>
鎽╂摝鎵�閫犳垚鐨勮兘閲忔崯澶卞钩鍧囧ぇ绾?/p>
鍗犲叏閮ㄦ満姊颁紶閫掕兘閲忕殑
30%
锛屾満姊拌璁¤�呭杞存壙涓懇鎿︾幇璞＄殑
浜嗚В鏄繀涓嶅彲灏戠殑銆?/p>
Plain
bearings
provide
sliding
support,
and
friction
is
usually
reduced
by
a
liquid,
solid,
or
gaseous
lubricant.
The
following types of plain bearings are in use:
婊戝姩杞存壙鎻愪緵婊戝姩鏀壙锛?/p>
鎽╂摝閫氬父鐢辨恫浣撱�?/p>
鍥轰綋鎴栨皵浣撶殑娑?/p>
婊戝墏鍑忓皯銆傛粦鍔ㄨ酱鎵挎湁浠ヤ笅绫诲瀷鐨勪娇鐢細
1 Journal bearings or sleeve bearings support a rotating or
oscillating
shaft.
The
bearing
usually
has
a
cylindrical
shape,
while the journal is most often physically a portion of the shaft.
When the bearing completely surrounds the journal, we speak of
a
full
bearing;
when
the
bearing
only
partly
surrounds
the
journal, it is called a partial bearing.
杞撮杞存壙鎴栧绛掕酱鎵挎敮鎾戞棆杞垨鎽嗗姩杞淬�?/p>
杞存壙閫氬父鍏锋湁鍦嗘煴
褰㈢姸锛岃�岃酱棰堟槸鐗╃悊杞存渶澶氱殑涓�閮ㄥ垎銆傚綋杞存壙瀹屽叏鍖呭洿杞撮鏃讹紝
鎴戜滑绉颁箣涓轰竴涓畬鏁寸殑杞存壙
;
褰撹酱鎵夸粎閮ㄥ垎鍦板洿缁曡酱棰堟椂锛屽畠琚?/p>
绉颁负涓�涓眬閮ㄨ酱鎵裤�?/p>
2
Thrust
bearings
support
an
axial
load
on
a
rotating
or
oscillating shaft.
鏃嬭浆鎴栨憜鍔ㄨ酱涓婄殑鎺ㄥ姏杞存壙鏀拺杞村悜璐熻嵎銆?/p>