Compressor having noise and vibration reducing reed valve

Details Compressor having noise and vibration reducing reed valve Compressor having noise and vibration reducing reed valve

1997-04-02

1999-01-12

Thorpe, Timothy

Pumps

Three or more cylinders arranged in parallel, radial, or...

417569, 417571, 137855, 137856, 13751215, F04B 5310, F16K 1114

Patent

active

058578390

ABSTRACT:
A compressor comprising a compressor housing including a cylinder block forming seven cylinders equiangularly spaced apart and extending axially therein. Each of the cylinders is slidably fitted with a piston, and a drive mechanism is coupled to the pistons to reciprocate them within the cylinders to create fluid suction and discharge. The drive mechanism includes a drive shaft rotatably supported in the housing and coupling means for converting the rotary motion of the drive shaft to reciprocating motion of the pistons. The coupling means may also include a rotor coupled to the drive shaft and a slant plate having a surface disposed at an inclined angle relative to the drive shaft. A valve plate fabricated from steel having a hardness in a range of about 120 to 450 Hv seals the cylinders, such that fluid is compressed between each of the pistons and the valve plate. The compressor also includes a suction chamber and a discharge chamber, and a suction port and a discharge port formed through the valve plate connect each of the cylinders with the suction chamber and the discharge chamber, respectively. A discharge reed valve fabricated from spring steel is positioned on the valve plate opposite the cylinders and urged to contact the valve plate, thereby closing the discharge ports, such that the discharge reed valve is deflected to open the discharge ports by an increase in the pressure of the compressed fluid in the corresponding cylinders, whereby the compressed fluid is discharged from the cylinders into the discharge chamber. The discharge reed valve has roughened surfaces which extends around each of the discharge ports when the discharge ports are closed. The surfaces are roughened to a predetermined roughness in a range of about 5 to 25 .mu.m R.sub.z and a mean peak distance in a range of about 75 to 200 .mu.m S.sub.m.

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