CN2041736U

CN2041736U - Machinery seal screw arbor negative pressure compression engine

Info

Publication number: CN2041736U
Application number: CN 88213623
Authority: CN
Inventors: 张长和; 李吉锡; 刘景田; 李士平
Original assignee: Shengli Oilfield Oil Production Headquarters Shengli Oilfield Campaign Headquar
Current assignee: Shengli Oilfield Oil Production Headquarters Shengli Oilfield Campaign Headquar
Priority date: 1988-08-23
Filing date: 1988-08-23
Publication date: 1989-07-26

Abstract

The utility model discloses a sealing device of the screw arbor negative pressure compression engine. The utility model is characterized in that the shaft seal site of both ends of cathode and anode screw arbors of the screw arbor negative pressure compression engine, the labyrinth groove on the shaft smoothed and polished, is provided with a machinery seal device; to increase heat dissipation ability, a water cooling heat dissipation coil pipe is arranged in a lubrication tank to directly cool the heat generated by a machinery seal movable ring. After the screw arbor negative pressure compression engine adopts machinery seal, the service life of the compression engine improves from original 1000-2000 hours to 8000-10000 hours, and quantities of man power and goods are saved. The utility model has a reasonable and safe structure, and is one of the main devices in energy resource recovery in oilfield development.

Description

Machinery seal screw arbor negative pressure compression engine

The utility model belongs to a kind of screw type negative pressure compressor, particularly about the seal arrangement of screw type negative pressure compressor.

The axle envelope of general screw type negative pressure compressor intake and exhaust end, all adopt little gap noncontact seal, they are to be made of stuffing box gland and epitrochanterian tooth, inhale the end sealing and be and prevent the ambient air compression chamber that bleeds, the sealing of row's end then is the leakage that stops gas, this hermetic seal formula screw rod negative pressure compressor, general sealing effect is relatively poor, turned round about 1500 hours and just begin to collaborate, the gas that spills enters in the lubricant oil, make lubricating oil emulsion rotten, and collaborate outward, screw type negative pressure compressor can't be used from tank filler.

Task of the present utility model is to set up a kind of improved Mechanical Sealed Type negative pressure compressor.

The utility model feature is, at the moon, sealing gland place, sun screw rod two ends, the labyrinth tank car plain grinding light on the axle, the diameter of axle is 70 millimeters, mechanical seal two fixing pins are installed, two pin centers should be point-blank, the endoporus of bearing support front end step is dark 15 millimeters of car inwards, and the aperture is 80 millimeters, and mechanical sealing static ring is set in the bearing support front end, the stationary ring exterior edge face is parallel to bearing support fastening flange end face, the sealing gland hole of air inlet body and engine housing is deepened 20～30 millimeters inward, guarantee that the spring of mechanical seal freely stretches, for increasing heat dissipation potential, in lubricating oil tank, installed the water cooling radiator coil tube additional, guaranteed to run well.

The utility model is selected single mechanical end face seal for use, and the O type circle on the stationary ring is sealed bearing oil and immersed compression chamber, and the O type circle on the rotating ring is sealed from the gas mixture that axially seals in, and prevents pollution lubricating oil.Stationary ring, rotating ring surface of contact have promptly completely cut off from the lubricant oil of stationary ring and have completely cut off the gas mixture that driven torus comes again, played axial and seal action radially, rubbing surface is by the heat that produces between the cooling water that immerses, lubricant oil is moving by string in the crack between stationary ring endoporus and the axle, the stationary ring surface of contact has played lubricated effect.

Accompanying drawing 1 is the utility model sectional drawing, Fig. 1 end cap wherein, Fig. 2 small gear, Fig. 3 synchromesh gear group, Fig. 4 D(E) 46408 angular contact ball bearings, Fig. 5 D(E) 42610 roller bearings, Fig. 6 female rotor thrust-bearing, Fig. 7 mechanical seal ring seal ring, Fig. 8 mechanical sealing static ring, Fig. 9 machinery envelope rotating ring, Figure 10 mechanical sealing linkage ring circle, Figure 11 mechanical seal spring, Figure 12 mechanical seal spring seat, pin, Figure 13 male rotor, Figure 14 female rotor, Figure 15 male rotor bearing support, Figure 16 female rotor bearing support, Figure 17 D(E) 32610 roller bearings, Figure 18 D(E) 46309 angular contact ball bearings, Figure 19 thrust disc, Figure 20 air inlet body, Figure 21 engine housing, Figure 22 oil sealing, Figure 23 external tooth axle sleeve, Figure 24 gland.

Accompanying drawing 2 is a lubricating oil tank, water cooling radiator coil tube schematic representation, and 25 for compressor Figure 26 is a lubricating oil tank among the figure, Figure 27 is the water cooling radiator coil tube.

The utility model is at the moon, sun screw rod two end axles envelope place, four mechanical seals are housed, mechanical sealing static ring (8) is set in the front end of bearing support, lubricant oil in the bearing can be from axle oil guide slot and stationary ring and slit that axle cooperates flow directly into the contact surface of stationary ring and rotating ring, form enough oil films, make it to have good lubricating condition, mechanical sealing linkage ring (9) and spring (11) communicate with compression chamber with the slit that axle cooperates by body, mixture in the compression chamber can enter the mechanical seal chamber by the slit, directly the heat that rotating ring is produced cools off timely, cooled mixture can be discharged with pressurized gas together, makes it to have good cool condition.

In order to make the lubricant oil in the bearing can better flow into stationary ring and rotating ring friction surface, the processing dimension of suitable increasing stationary ring endoporus, after the stationary ring assembling, the nonparallelism of stationary ring exterior edge face and bearing flange internal surface must not be greater than 0.02 millimeter.The running of assembling back must not be greater than 0.06 millimeter to the shaft centre line jerk value at the seal ring position.Because the mechanical sealing linkage ring of screw rod negative pressure compressor inlet end bears negative pressure, should suitably strengthen spring strength, the mechanical sealing linkage ring malleation of exhaust end, to suitably reduce spring strength, for preventing that the temperatures involved that stationary ring and rotating ring friction surface produce from normally sealing, must select high-quality heat-resistant, wear-resistant material, rotating ring should be selected Tungsten carbite, stationary ring should be selected the graphite impregnation tin bronze, and spring should be selected resistant material Cr18Ni12MO2Ti.

The utility model is one of key equipment that reclaims in the oil development energy, and it is the heart in stable, the big tank air aspiration process flow process of crude oil. Owing to saved hermetic seal and Balance Air system flow process, thereby reduce investment and operational degree are installed, reduced operational procedure, eliminated environmental pollution, improved security. After the screw negative pressure compression adopted mechanical seal, service life brought up to 8000～10000 hours by original 1000～2000 hours by complete machine, reduced the repairing number of times, and can save lot of materials and repairing expense.

Claims

1, a kind of Mechanical Sealed Type screw rod negative pressure compressor, the utility model feature is: at negative and positive screw rod two end axles envelope place, adopt mechanical seal device, with the labyrinth tank car plain grinding light on the axle, the diameter of axle is 70 millimeters, mechanical seal two fixing pins (12) are installed, and two pin centers should be point-blank.

2, according to the described compressor of claim 1, it is characterized in that: the endoporus of bearing support front end step is dark 15 millimeters of car inwards, diameter is 80 millimeters, mechanical sealing static ring (8) is set in the bearing support front end, the stationary ring exterior edge face is parallel to bearing support fastening flange end face, and mechanical sealing linkage ring (9) and spring (11) communicate with compression chamber with the slit that axle cooperates by body.

3, according to claim 1 or 2 described compressors, it is characterized in that: the sealing gland hole of air inlet body (20) and engine housing is deepened 20～30 millimeters inward, make the spring of mechanical seal flexible freely.

4, according to the described compressor of claim 1, it is characterized in that: a water cooling radiator coil tube (27) is installed in lubricating oil tank (26) lining.

5, according to the described compressor of claim 2, it is characterized in that: the material of rotating ring should be selected Tungsten carbite, and the material of stationary ring should select to flood tin bronze, and spring should be selected resistant material Cr18Ni12MO2Ti.