CN202370786U

CN202370786U - Totally oil-free lubrication high pressure air compressor

Info

Publication number: CN202370786U
Application number: CN201120529743XU
Authority: CN
Inventors: 汪潜
Original assignee: ANQING BAILIAN OIL-FREE COMPRESSOR Co Ltd
Current assignee: ANQING BAILIAN OIL-FREE COMPRESSOR Co Ltd
Priority date: 2011-12-19
Filing date: 2011-12-19
Publication date: 2012-08-08
Anticipated expiration: 2021-12-19

Abstract

The utility model discloses a totally oil-free lubrication high pressure air compressor. The air compressor comprises a power device, a guide cylinder, a middle body, a cylinder, an upper pressing block, a lower pressing block, an upper lining plate and a lower lining plate, wherein the inner cavities of the guide cylinder, the middle body and the cylinder are communicated; an outer cylinder sleeve is fixedly arranged in the inner cavity of the cylinder; a guide sleeve, a plurality of sealing boxes and an inner cylinder sleeve are sequentially arranged between a plunger and the wall of the inner cavity of the outer cylinder sleeve along the axial direction; a guide ring is arranged between the guide sleeve and the plunger; the plunger is movably connected with an aligning device; an air valve and a cylinder head are arranged on the upper part of the cylinder; outer O-shaped rings are arranged between the sealing boxes and the outer cylinder sleeve; a plurality of sealing rings matched with the plunger are arranged in each sealing box; and inner O-shaped rings are arranged between the sealing rings and each sealing box. The inner cylinder sleeve, the sealing rings, the guide ring and support rings are made from a self-lubricating material, the power device has an oil-free lubrication structure, totally oil-free compression can be realized, compressed gas is not polluted, and the air compressor is safely used; the cylinder has high sealing performance and compression efficiency; and the air compressor is low in manufacturing cost and has long service life.

Description

The full-oil-free lubrication High Pressure Air Compressor

Technical field

The utility model relates to air compressor, is specifically related to a kind of High-Pressure Compressor.

Background technique

In the High-Pressure Compressor field, mainly contain two kinds of structural types on the market: diaphragm type and reciprocating piston type.The gas that diaphragm air compressor is discharged can guarantee cleaning nothing oil, but set structure is complicated, and independently hydraulic system and air-channel system are arranged, and part processing precision requires high, and product involves great expense, the manufacturing of easily damaged parts palpus employing imported materials; When some dangerous gas of compression, also should use the lubricant oil with property, machine run and maintenance cost are high.Limited by the diaphragm deformation amount, Cylinder Stroke Volume is less, generally is used for special occasions such as little tolerance and supercharging.The cylinder portion great majority of reciprocating piston type High Pressure Air Compressor adopt oiling or little oil lubrication; And its motion structure adopts thin oil lubricant; Guarantee that the gas of discharging does not contain lubricant oil, must between fuselage and cylinder, increase distance piece, prevent that the lubricant oil in the fuselage from scurrying into cylinder.Gas such as O that some are responsive to oil content ₂Deng, in cylinder, be compressed into high-temperature high-pressure state, dangerous huge if running into lubricant oil can fire at once, though machine is provided with the intermediate isolating section, hidden danger exists all the time.

Summary of the invention

The utility model technical problem to be solved is to provide a kind of full-oil-free lubrication High Pressure Air Compressor, can realize contracting completely without oil pressure, and pressurized gas is not contaminated; Cylinder pressurization ratio is good, and compression efficiency is high; Processing is simple, low cost of manufacture, and the easily damaged parts life-span is long; Safe in utilization, compressible dangerous gas medium.

For addressing the above problem, the full-oil-free lubrication High Pressure Air Compressor of the utility model comprises crankcase; Be movably set with bent axle through stuffing box bearing on the crankcase; Also comprise connecting rod, connecting rod one end and bent axle flexibly connect through stuffing box bearing, and the other end is connected with the guiding cylinder; Described guiding cylinder is fixedly connected with cylinder through intermediate, and the inner chamber of guiding cylinder is movably set with guide piston through support ring; The inner chamber of cylinder is set with outer cylinder sheath, and the two ends of outer cylinder sheath are fixed on the cylinder through lower lock block, upper holder block respectively; The inner chamber of outer cylinder sheath is movably set with plunger, is disposed with guide pin bushing, a plurality of sealing case, inner cylinder liner between the internal chamber wall of plunger and outer cylinder sheath vertically; Also be provided with lead ring between guide pin bushing and the plunger; Be provided with outer O type circle between sealing case and the outer cylinder sheath, each sealing case set inside has a plurality of seal rings that cooperate with plunger, O type circle in being respectively arranged with between a plurality of seal rings and the sealing case; Be provided with down liner plate between lower lock block and the guide pin bushing, be provided with liner plate between upper holder block and the inner cylinder liner; Plunger is connected with guide piston; Cylinder top is equipped with air valve and cylinder head; Described lead ring, support ring, inner cylinder liner, seal ring adopt the self lubricating material manufacturing.

Also be provided with aligning device between described guide piston and the plunger.

In technique scheme, owing to inner cylinder liner, seal ring are that sliding friction contacts with lead ring and piston, wherein inner cylinder liner, plunger and cylinder head are formed cylinder working chamber, and inner cylinder liner and lead ring and plunger adopt transition fit.During compressor operating; Along with the motion of guide piston, drive plunger and make compression movement, the cylinder operation intracavity gas is compressed; Pressure is increased to rated pressure gradually; The part pressurized gas are leaked to first group of sealing case place along the micro-gap between plunger and the inner cylinder liner, and outer O type circle static seal is adopted in sealing case and inner cylinder liner lower end, and a leakage is blocked; O type circle static seal in adopting between seal ring and the sealing case; Remaining unique leakage is the gap between plunger and seal ring, adopts interference fit between seal ring and the plunger, does not have the gap during assembling; Interior O type circle on the seal ring applies a pretightening force in addition, and pressurized gas are pressed to plunger from the seal ring back side during work, and seal ring internal surface and plunger are held tightly; Pressurized gas can only be revealed along between plunger and the seal ring because the atomic gap that machining forms, but the gas pressure that spills decline is a lot, passes through the seal action of several groups of seal rings in back again; The gas that finally leaks out is few; Reach the purpose of sealing, cylinder pressurization ratio is good, and compression efficiency is high.

The utility model further is provided with aligning device, in conjunction with aligning device plunger is located, and guarantees plunger and inner cylinder liner central lines, can reduce wearing and tearing, prolongs the easily damaged parts life-span.

The power setting part of the utility model has adopted the bearing of sealed type grease lubrication to connect, and does not therefore have oil leak.The plunger of the utility model is a metal material; Generation friction portions such as inner cylinder liner, seal ring, lead ring and support ring all adopt the self lubricating material manufacturing; Thereby when guaranteeing interference fit; Need not add any lubricant grease still can facile motion, realizes contracting completely without oil pressure, and pressurized gas is not polluted by lubricant grease; The sealing case of the utility model has adopted modular structure, and processing is simple, and low cost of manufacture can singlely be changed, and maintenance cost is low; Because pressurized gas keeps clean during work, thus no explosion risk under the HTHP, safe in utilization, compressible dangerous gas medium.

Description of drawings

Fig. 1 is the structural representation of the utility model full-oil-free lubrication High Pressure Air Compressor;

Fig. 2 is the sealing case part schematic representation of the utility model full-oil-free lubrication High Pressure Air Compressor.

Embodiment

Below in conjunction with accompanying drawing a kind of full-oil-free lubrication High Pressure Air Compressor of the utility model is further specified.

Visible by Fig. 1, Fig. 2, the full-oil-free lubrication High Pressure Air Compressor of the utility model comprises crankcase 20; Be movably set with bent axle 22 through stuffing box bearing on the crankcase 20; Also comprise connecting rod 21, connecting rod 21 1 ends and bent axle 22 flexibly connect through stuffing box bearing, and the other end is connected with guiding cylinder 1; Connect because bent axle 22, connecting rod 21 all pass through stuffing box bearing, stuffing box bearing is grease lubrication and has seal ring, is standard piece, and the anxiety of unlubricated oil leakage is guaranteed can not pollute pressurized gas.

Described guiding cylinder 1 is fixedly connected with cylinder 10 through intermediate 4, and the coaxial setting of inner chamber of guiding cylinder 1, intermediate 4, cylinder 10 guarantees the installation and the work of remaining part; The inner chamber of guiding cylinder 1 is movably set with guide piston 2 through support ring 3, and support ring 3 is assemblied in guide piston 2 cylindricals, makes it to move up and down along guiding cylinder 1.

The inner chamber of cylinder 10 is set with outer cylinder sheath 12, and the two ends of outer cylinder sheath 12 are fixed on the cylinder 10 through lower lock block 6, upper holder block 6 ' respectively; The inner chamber of outer cylinder sheath 12 is movably set with plunger 14, is disposed with guide pin bushing 8, a plurality of sealing case 11, inner cylinder liner 15 between the internal chamber wall of plunger 14 and outer cylinder sheath 12 vertically.

Guide pin bushing 8 is a metal material, can play the support positioning action to a plurality of sealing casees 11, the inner cylinder liner 15 of top, and guide pin bushing 8 is tube structures; Upper end closed and in the upper-end surface center drilling; The aperture is greater than plunger 14 diameters, so guide pin bushing 8 directly do not contact with plunger 14, also is provided with lead ring 9 between guide pin bushing 8 and the plunger 14; The internal diameter of lead ring 9 and plunger 14 couplings constitute sliding friction between the two.

Sealing case 11 is the tube structure of metal material, and the bottom is open fully, upper end closed and in the upper-end surface center drilling, the aperture is greater than plunger 14 diameters, so sealing case 11 directly do not contact with plunger 14 yet, thereby avoids the mutual wearing and tearing between the metal.The upper limb outer end of sealing case 11 is processed with breach, O type circle 13 outside in this breach, being provided with, and O type circle 13 is arranged between sealing case 11 and the outer cylinder sheath 12 in addition, and outer O type circle 13 is the rubber material, and static seal is carried out in the gap between sealing case 11 and the outer cylinder sheath 12.

Each sealing case 11 set inside has a plurality of seal rings 18 that cooperate with plunger 14, in the present embodiment, is provided with two seal rings 18.O type circle 19 in being respectively arranged with between a plurality of seal rings 18 and the sealing case 11; Interior O type circle 19 also is the rubber material, and its effect is that static seal is carried out in the gap between seal ring 18 and the sealing case 11.

Be provided with down liner plate 7 between lower lock block 6 and the guide pin bushing 8, be provided with liner plate 7 ' between upper holder block 6 ' and the inner cylinder liner 15; Plunger 14 is connected with guide piston 2; Cylinder 10 tops are equipped with air valve 16 and cylinder head 17.Air valve 16 has concurrently air-breathing and two kinds of functions of exhaust, and when air-breathing, the exhaust passage is closed fully; During exhaust, air intake passage is closed fully.

Described lead ring 9, support ring 3, inner cylinder liner 15, seal ring 18 adopt the self lubricating material manufacturings; Adopting with the polyflon in the present embodiment is the composite material of base material, and this composite material also comprises following composition: bronze powder, glass fibre, graphite fiber, molybdenum disulfide.Polytetrafluoroethylmaterial material has good self-lubricating property, and friction factor is little, and toughness and wear resistance might as well.The effect of bronze powder is the wear-resisting property that improves base material, improves hardness and increases heat conductivity; Glass fibre and graphite fiber are used to improve wear resistance and thermal conductivity, and have improved intensity; Molybdenum disulfide is used to improve thermal conductivity, improves self-lubricating property, strengthens wear resistance.

This composite material possesses performances such as high temperature resistant preferably, wear-resisting, possesses good self-lubricating effect simultaneously, thereby need not to add lubricant oil; Realization is contracted completely without oil pressure; Go for the various environment that the pressurized gas clean level is had relatively high expectations and use, when machine is worked under HTHP simultaneously, owing to oil-containing not in the gas; Do not have hidden peril of explosion, therefore possess higher safety coefficient.This composite material possesses certain structure intensity, can satisfy need of work.Each parts of the power section of the utility model connect through stuffing box bearing, therefore do not have oil leak, can not pollute pressurized gas.

In technique scheme, owing to inner cylinder liner 15, seal ring 18, lead ring 9 are that sliding friction contacts with plunger 14, wherein inner cylinder liner 15, plunger 14 and air valve 16, cylinder head 17 are formed cylinder working chambers 20, and inner cylinder liner 15 adopts transition fit with lead ring 9 and plunger 14.During compressor operating, power plant drive guide piston 2 motions, guide piston 2 drive plunger 14 through connecting rod 21.Along with the motion of guide piston 2, it is reciprocating to drive plunger 14.

When plunger 14 is done compression movement; Gas is compressed in the cylinder working chamber 20; Pressure be increased to gradually rated pressure (>=10MPa); The part pressurized gas are leaked to first group of sealing case 11 place along the micro-gap between plunger 14 and the inner cylinder liner 15, and sealing case 11 adopts outer O type circle 13 static seals with inner cylinder liner 15 lower ends, and this leakage is blocked; O type circle 19 static seals in adopting between seal ring 18 and the sealing case 11; Remaining unique leakage is the gap of 18 of plunger 14 and seal rings, adopts interference fit between seal ring 18 and the plunger 14, does not have the gap during assembling; The interior O type circle 19 that is provided with on the seal ring 18 in addition applies a pretightening force; Pressurized gas are pressed to plunger 14 from seal ring 18 back sides during work, and seal ring 18 internal surfaces and plunger 14 are held tightly, and pressurized gas can only be revealed along between plunger 14 and the seal ring 18 because atomic gap that machining forms; But the gas pressure that spills descends a lot; Pass through the seal action of several groups of seal rings 18 in back again, the gas that finally leaks out is few, reaches the purpose of sealing.

Plunger 14 is connected and can directly connects with guide piston 2, does not influence the work of the utility model.

But in process of production, have less part processing and assembly error, plunger 14 is prone to produce the out-of-alignment phenomenon with inner cylinder liner 15; Be head it off; The utility model further is provided with aligning device 5 between guide piston 2 and plunger 14, aligning device 5 comprises aligning body 50, is provided with upper bearing (metal) 51, lower bearing 52 in the aligning body 50; Plunger 14 1 ends are arranged in the aligning body 50 through upper bearing (metal) 51, and guide piston 2 one ends are arranged in the aligning body 50 through lower bearing 52.Because of upper bearing (metal) 51, lower bearing 52 are selfaligning bearings, so aligning device 5 possesses the self-aligning function, can guarantee during compressor operating that plunger 14 and inner cylinder liner 15 remain coaxial state; Thereby guarantee sealing, reduce wear, can prolong the working life of easily damaged partss such as inner cylinder liner 15, seal ring 18, lead ring 9.

Claims

1. full-oil-free lubrication High Pressure Air Compressor; Comprise crankcase (20); Crankcase (20) is gone up and is movably set with bent axle (22) through stuffing box bearing; Also comprise connecting rod (21), connecting rod (21) one ends and bent axle (22) flexibly connect through stuffing box bearing, and the other end is connected with guiding cylinder (1); It is characterized in that: described guiding cylinder (1) is fixedly connected with cylinder (10) through intermediate (4), and the inner chamber of guiding cylinder (1) is movably set with guide piston (2) through support ring (3); The inner chamber of cylinder (10) is set with outer cylinder sheath (12), and the two ends of outer cylinder sheath (12) are fixed on the cylinder (10) through lower lock block (6), upper holder block (6 ') respectively; The inner chamber of outer cylinder sheath (12) is movably set with plunger (14), is disposed with guide pin bushing (8), a plurality of sealing case (11), inner cylinder liner (15) between the internal chamber wall of plunger (14) and outer cylinder sheath (12) vertically; Also be provided with lead ring (9) between guide pin bushing (8) and the plunger (14); Be provided with outer O type circle (13) between sealing case (11) and the outer cylinder sheath (12); Each sealing case (11) set inside has a plurality of seal rings (18) that cooperate with plunger (14), O type circle (19) in being respectively arranged with between a plurality of seal rings (18) and the sealing case (11); Be provided with down liner plate (7) between lower lock block (6) and the guide pin bushing (8), upper holder block (6 ') and inner cylinder liner are provided with liner plate (7 ') between (15); Plunger (14) is connected with guide piston (2); Cylinder (10) top is equipped with air valve (16) and cylinder head (17); Described lead ring (9), support ring (3), inner cylinder liner (15), seal ring (18) adopt the self lubricating material manufacturing.

2. full-oil-free lubrication High Pressure Air Compressor as claimed in claim 1 is characterized in that: also be provided with aligning device (5) between described guide piston (2) and the plunger (14).