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Packing cup for a reciprocating compressor

A technology of packing discs and compressors, which is applied to parts of pumping devices for elastic fluids, engine seals, mechanical equipment, etc., and can solve problems such as fatigue fractures

Active Publication Date: 2013-11-20
NUOVO PIGNONE TECH SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the type of material from which the known packing pans are manufactured and the type of loads applied to the packing pans, there are very frequently problems with fatigue fractures of the type described above

Method used

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  • Packing cup for a reciprocating compressor
  • Packing cup for a reciprocating compressor
  • Packing cup for a reciprocating compressor

Examples

Experimental program
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Effect test

Embodiment Construction

[0014] Specific reference figure 1 , schematically shows in partial section a cylinder 10 of a reciprocating compressor, in particular for the production of polymers and copolymers derived from ethylene (such as, for example, low density polyethylene (LDPE) or vinyl acetate The cylinder block of the second stage of the reciprocating super compressor of ethyl ester (EVA).

[0015] The cylinder 10 basically comprises a flange 12 serving as a connection to the support frame of the compressor (not shown) and a head 14 housing a suction and discharge valve 16 for the gas to be compressed. The gas is compressed by a specific piston 18 comprising a cylindrical shaft called a "plunger" which is inserted into the packing stack and the spacer element 16 arranged between the head 14 and the packing stack itself The way of reciprocating motion to slide.

[0016] The packing stack includes a plurality of packing discs 22 ( figure 2 ). Outside the packing stack there is a member called...

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PUM

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Abstract

The invention describes a packing cup (22) for the cylinder (10) of a reciprocating compressor. The packing cup (22) is formed from a first outer disc (28) and from a second inner disc (30), concentric to the first outer disc (28) and inside which a seat is formed for at least one sealing element for the piston (18). At least a part of the packing cup (22) is manufactured from a high- strength metallic alloy, obtained through a melting process and subsequent plastic deformation. The material is finally subjected to special heat treatments to improve the overall mechanical properties of the packing cup (22).

Description

technical field [0001] The present invention relates to packing cups for reciprocating compressors, in particular but not exclusively capable of being used for high pressure compression operating in the field of production of polymers and copolymers derived from ethylene machine (the so-called "super compressor"). Background technique [0002] As is known, a compressor is a machine capable of increasing the pressure of a compressible fluid (gas) by using mechanical energy. In a reciprocating compressor, the compression of fluid is accomplished by one or more movable pistons with reciprocating motion within corresponding cylinders. Fluid to be compressed is pumped into the cylinder through one or more inlet conduits, and compressed fluid is discharged from the cylinder to one or more delivery conduits. Typically, the piston or pistons of a reciprocating compressor are actuated by an electric motor, or otherwise by an internal combustion engine through a crankshaft and a con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B53/16F16J15/28
CPCF16J15/28F04B53/164
Inventor N·坎波M·加诺兹M·贝拉奇F·基西
Owner NUOVO PIGNONE TECH SRL