CN201982274U - Scraper ring of piston type air compressor - Google Patents

Abstract

The utility model discloses a scraper ring of a piston type air compressor, which is sleeved on a piston rod and is integrally in a ring shape. The scraper ring comprises three equant arc-shaped ring bodies, the outer walls of the ring bodies are all provided with communicated grooves along the circumference, the grooves of the three ring bodies are communicated, and elastic hooping components are also arranged in the grooves. When the scraper ring is abraded, the scraper ring is always tightly sleeved on the piston rod under the effect of the elastic hooping components so as to effectively avoid leakage, and the service life of the scraper ring is also prolonged. In addition, the split type scraping ring is easier to assemble and disassemble, which is conductive to quick overhaul.

Description

The scraper ring of piston type air compressor

Technical field

The utility model relates to scraper ring, more particularly, relates to a kind of scraper ring of piston type air compressor.

Background technique

Piston type air compressor rotates bent axle by motoring, makes the rotation motion of bent axle become piston moving linearly in cylinder through connecting rod with crosshead again.When piston during at top dead center, the Aspirating valves of cylinder is opened, and air enters in the cylinder; When piston when lower dead center moves, Aspirating valves is closed, air is compressed, pressure raises, outlet valve is backed down in the cylinder, exhaust finishes during the piston arrives lower dead center, goes round and begins again, and finishes work cycle one by one.After gas enters the compression of one-level cylinder, again through the interstage cooler cooling, enter the secondary cylinder compression then, the air through the secondary compression is admitted in the gas holder at last, uses for the user by pipeline.

See also Fig. 1, shown in Figure 2, above-mentioned piston is made up of piston rod 1, scraper ring 10 and retaining compression ring 3, and piston rod 1 is being with piston block 4 moving linearlies, and retaining compression ring 3 and scraper ring 10 in the stuffing box 5 are tightly overlapping piston rod 1.Because the crankcase of piston type air compressor 6, connecting rod 7 need a large amount of oil lubricatings and cooling at the volley, so there is the machine oil of part to enter in the stuffing box 5 by piston rod 1, if the scraper ring 10 in the stuffing box 5 is bad, can cause the retaining compression ring 3 of rubber material impaired, cause machine oil to scurry and be rushed to 8 li of air chambers, moreover the air of compression be forced in the crankcase 6, make that pressurized air is moisture, oil content is big, rated pressure reduces, lubricating oil emulsion, and then cause the high repair rate of air compressor.Therefore, the quality of piston rod 1 and stuffing box 5 assemblies (rubber stop compression ring and c scraper ring) and assembly precision working life of directly influencing compressed-air actuated quality and air compressor.

Please in conjunction with shown in Figure 3, trace it to its cause and be, the one, existing scraper ring 10 designs are unreasonable, promptly this scraper ring 10 is integral type circle structures of sealing, when piston rod 1 outer wall and the friction of scraper ring 10 inwall moving linearlies, easily is worn, machine oil is taken advantage of the crack and enter, damage, emulsification rubber stop compression ring 3, and then and scurry into 8 li of air chambers, cause compressed air quality variation (band oil, band water); And the scraper ring 10 that damages is changed complicated, often need earlier gland 2 screws to be unloaded, again coupling 9 is pulled down, make piston rod 1 break away from coupling 9, the gland 2 of stuffing box 5 is pulled out again, and unclamp with the spring button hook of bad scraper ring 3, last is taken off scraper ring 3, also need during installation to calibrate with slide calliper rule, leveling instrument, general air compressor operation continuously will be changed in 2400 hours.The 2nd, the scraper ring 10 of this structure is difficult for centering, and problem such as can produce wearing and tearing, gap, pull also causes leakage of oil and gas leakage easily.

The model utility content

At the above-mentioned shortcoming that exists in the prior art, the purpose of this utility model provides a kind of scraper ring of piston type air compressor, and this scraper ring can overcome the leakage problem of wearing and tearing and bringing, and prolongs its working life, and is convenient for changing.

For achieving the above object, the utility model adopts following technological scheme:

The scraper ring of this piston type air compressor is sheathed on the piston rod, scraper ring integral body is circular, comprises the circular-arc ring body of three five equilibriums, and the outer wall upper edge circumference of ring body all offers the groove that communicates, the groove of three ring bodies communicates, and also is provided with elasticity lock ring parts in groove.

The lock ring spring that pintle connects headed by the described elasticity lock ring parts.

Also be provided with contraction joint between the described adjacent ring body.

Also radially offer oil guide slot on the described ring body.

In technique scheme, the scraper ring of piston type air compressor of the present utility model is sheathed on the piston rod, its integral body is circular, the circular-arc ring body that comprises three five equilibriums, the outer wall upper edge circumference of ring body all offers the groove that communicates, the groove of three ring bodies communicates, and also is provided with elasticity lock ring parts in groove.When wearing and tearing take place in scraper ring, be subjected to the effect of elasticity lock ring parts, make scraper ring tightly be enclosed within on the piston rod all the time, thereby effectively avoided the generation of leaking, and prolonged its working life, in addition, adopt the split type easier dismounting of scraper ring, help quick maintenance.

Description of drawings

Fig. 1 is the piston structure cross-sectional schematic of the piston type air compressor of prior art;

Fig. 2 is the A portion enlarged diagram among Fig. 1;

Fig. 3 is the axial schematic representation of the scraper ring of prior art;

Fig. 4 is the axial schematic representation of scraper ring of the present utility model;

Fig. 5 is the sectional view of a ring body of the present utility model;

Fig. 6 is the unfolded drawing of lock ring spring of the present utility model.

Embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

See also Fig. 4, shown in Figure 5, the scraper ring 20 of piston type air compressor of the present utility model equally also is sheathed on the piston rod, and these scraper ring 20 integral body are circular, the circular-arc ring body 21 that comprises three five equilibriums, the outer wall upper edge circumference of ring body 21 all offers the groove 22 that communicates, and also radially offers oil guide slot 23 on the ring body 21.The groove 22 of three ring bodies 21 communicates, and also is provided with elasticity lock ring parts 24 (see figure 6)s in groove 22, and is from the outside that three ring bodies 21 are combined and tightly be enclosed within on the piston rod by elasticity lock ring parts 24.So, even when wearing and tearing take place scraper ring 20, be subjected to the effect of elasticity lock ring parts 24, make whole scraper ring 20 tightly be enclosed within on the piston rod all the time, thereby effectively avoided lubricating oil leakage, emulsification to keep off compression ring and scurry in the air chamber, also prolonged the working life of scraper ring 20 simultaneously.And also be provided with contraction joint 25 between adjacent ring body 21, the contraction during with 20 wearing and tearing of cooperation scraper ring is tightly overlapped.

Please in conjunction with shown in Figure 6, above-mentioned elasticity lock ring parts 24 can adopt the lock ring spring, by being located in the groove 22, and carry out the head and the tail clasp joint, thus three ring bodies 21 of lock ring.When needs are changed scraper ring 20, spring is broken off relations, three ring bodies 21 are separated, thereby need not to dismantle other parts of piston, promptly can realize the quick replacing of scraper ring 20.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.

Claims (4)

1. the scraper ring of a piston type air compressor is sheathed on the piston rod, it is characterized in that:

This scraper ring integral body is circular, comprises the circular-arc ring body of three five equilibriums, and the outer wall upper edge circumference of ring body all offers the groove that communicates, and the groove of three ring bodies communicates, and also is provided with elasticity lock ring parts in groove.

2. the scraper ring of piston type air compressor as claimed in claim 1 is characterized in that:

The lock ring spring that pintle connects headed by the described elasticity lock ring parts.

3. the scraper ring of piston type air compressor as claimed in claim 1 is characterized in that:

Also be provided with contraction joint between the described adjacent ring body.

4. the scraper ring of piston type air compressor as claimed in claim 1 is characterized in that:

Also radially offer oil guide slot on the described ring body.

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