US 6,092,997 AGranted

Compressor

AssigneeKabushiki Kaisha Toyoda Jidoshokki Seisakusho

InventorsNaofumi Kimura, Akira Nakamoto, Masakazu Obayashi, Satoshi Koumura

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Abstract

A compressor having a rotating member, which includes a drive shaft and a swash plate. A piston compresses gas and torsionally vibrates the rotating member. A damper is coupled to the shaft to reduce torsional vibrations of the rotating member. The natural frequency of the damper is substantially equal to that of the rotating member. The damper includes a metal pin coupled to the shaft, a weight coupled to the rotating member, and a rubberlike body arranged between the shaft and the weight. The pin functions as a spring acting in the direction of the torsional vibrations and has a spring constant that remains substantially the same within the operating temperature range of the compressor. The weight is vibrated torsionally with the rotating member by the pin to offset the torsional vibrations of the rotating member. The natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the pin. The rubberlike body absorbs the torsional vibrations of the rotating member and has a spring constant smaller than that of the pin such that the natural frequency of the damper is substantially unaffected by the rubberlike body.

Claims15

Dependent claims

A compressor having a rotating member, which includes an integrally rotating drive shaft, a compressing member driven by the rotating member to compress fluid, which causes torsional vibrations of the rotating member, and a damper for decreasing the torsional vibrations of the rotating member, the damper having a natural frequency substantially equal to that of the rotating member, wherein the damper comprises:

a spring member coupled to the rotating member, wherin the spring member functions as a torsional spring acting in the direction of the torsional vibration and is made of a material having a spring constant that remains substantially within the operating temperature range of the compressor;
a weight coupled to the rotating member by the spring member, wherein the weight is vibrated torsionally with the rotating member by the spring member to offset the torsional vibrations of the rotating member, and wherein the natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the spring member;
and
an absorbing member arranged between the rotating member and the weight to absorb torsional vibrations of the rotating member, wherein the absorbing member has a spring constant smaller than that of the spring member such that the natural frequency of the damper is substantially unaffected by the absorbing member wherein the spring member and the absorbing member each independently connects the rotating member to the weight.

1 more element

A compressor employed in a vehicle air-conditioner, wherein the compressor comprises:

a drive shaft;
a swash plate supported to rotate integrally with the drive shaft, the swash plate and the drive shaft defining a rotating member;
a piston coupled to the swash plate and reciprocated by the rotation of the swash plate to compress fluid, wherein compression of the fluid by the piston causes torsional vibrations of the rotating member;
a damper for decreasing the torsional vibrations of the rotating member, the damper having a natural frequency substantially equal to that of the rotating member, wherein the damper includes a metal pin extending from an end of the drive shaft, the metal pin acting as a torsional spring in the direction of the torsional vibration, the metal pin having a spring constant that remains substantially the same within the operating temperature range of the compressor;
a weight coupled to the rotating member by the metal pin, wherein the weight is vibrated torsionally with the rotating member by the metal pin to offset the torsional vibrations of the rotating member, and wherein the natural frequency of the damper is determined mainly by the mass of the weight and the spring constant of the metal pin;
and
an elastomeric body arranged between the drive shaft and the weight to absorb the torsional vibrations of the rotating member, wherein the elastomeric body has a spring constant smaller than that of the metal pin such that the natural frequency of the damper is substantially unaffected by the elastomeric body, wherein the damper and the elastomeric body each independently connects the rotating member to the weight.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 09/187,724Filed 5 Nov 1998
Priority: JP 9-32875128 Nov 1997
Granted: 25 Jul 2000
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

F16F 15/1442
Elastomeric springs, i.e. made of plastic or rubber: with a single mass
F04B 27/1036
Having stationary cylinders: component parts, details, e.g. sealings, lubrication
F04B 39/0088
Pulsation and noise damping means: using mechanical tuned resonators
F04C 29/0021
Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00: systems for the…