Oil-free lubrication reciprocating compressor packing box

Abstract

The invention discloses an oil-free lubrication reciprocating compressor packing box, and a packing in a sealed chamber comprises a tapered cut three-segment planar sealing ring, a three-segment planar locking ring and a restrictive ring, which are arranged from the side of a cylinder to the side of a crankshaft in parallel; the packing which is positioned in the sealed chamber, accounts for 1 / 3-1 / 2 of the total quantity and positioned on the side of the cylinder is provided with an unloading groove, the unloading groove comprises at least one internal unloading groove which is arranged on the end surface on the side of the cylinder of the tapered cut three-segment planar sealing ring along the radial direction and at least one external unloading groove which is arranged on the end surface on the side of the crankshaft of the three-segment planar locking ring along the radial direction. The oil-free lubrication reciprocating compressor packing box can leak gas producing back pressure in the sealed chamber to the packing which is not provided with the unloading groove and positioned on the side of the crankshaft stage by stage and produce the back pressure to the packing, thereby leading the embracing and hooping force of the packing of the whole packing box to a piston rod to be balanced comparatively, leading all the packing to participate in sealing, being capable of effectively prolonging the life cycle of the packing, reducing the maintenance frequency, reducing the using and maintenance cost, ensuring the long period normal operation of production and being conductiveto ensuring the environment of a factory.

Description

technical field [0001] The invention relates to a compressor component, in particular to an oil-free lubrication reciprocating compressor sealing component. Background technique [0002] A compressor is a dynamic device that compresses gas and increases the pressure of the gas or transports the gas. It is widely used in chemical industry, energy and other fields. Among them, the reciprocating compressor is more widely used in high-pressure occasions due to its relatively simple manufacturing process and large compression ratio. [0003] The reciprocating compressor is a typical power machine that converts rotation into reciprocating motion. The gas in the cylinder is compressed by the reciprocating piston to achieve high pressure; the piston is driven by the crankshaft connecting rod mechanism through the piston rod, and the dynamic seal at the piston rod is It is one of the necessary conditions to ensure the normal operation of the compressor, especially when transporting ...

AI Technical Summary

Problems solved by technology

However, when the transmission medium has high requirements for cleanliness, oil lubrication will pollute the medium, making the production unable to proceed normally; The compressor generally adopts oil-free lubrication sealing structure

Oil-free lubrication makes the working conditions of the packing extremely harsh. Due to the characteristics of the packing structure, the packing on the cylinder side is greatly compressed, and the hoop force on the piston rod is also large, which increases the sealing effect and also increases the friction. , the packing wears out rapidly in a short time and produces serious cold flow phenomenon. After failure, the large back pressure gradually shifts to the crankshaft side, the sealing effect of the entire stuffing box is unbalanced, and it gradually wears out from the inside to the outside in a short time Failure, resulting in a very short service life of the replaced packing, the non-leakage condition can only last for a few days, and the average replacement life is less than one month, which increases the cost of use and maintenance; moreover, due to the relatively high pressure level, it is difficult to disassemble and assemble parts, which increases The labor intensity of maintenance is reduced; seriously, it affects the normal production. Long-term leakage is only a deterioration of environmental conditions, which affects the environmental protection indicators and working environment of the factory.

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