CN2313058Y - Combined piston ring - Google Patents

Abstract

The utility model relates to an airtight piston ring used for various oil engine pistons. Two rings which are radially overlapped and are provided with pin holes in position are combined to form the utility model. The utility model has the advantages that the service life is long, and the starting and the oil consumption performances of the engine can be improved nicely. The utility model can also be used in other devices which are provided with pistons and piston rings.

Description

Compound piston ring

The utility model is a kind of gas-tight piston ring that is used on all kinds of fuel engine pistons.

Compression and oil ring groove are all arranged on general piston, piston ring is housed in compression, be used for airtight.The piston ring of widespread usage is owing to the reason of its structure and form at present, motion along with piston in the using process, piston ring weares and teares gradually, its counterpart gap increases gradually, when aspirating stroke, cause crankcase inner engine oil mist to enter the firing chamber from the gap with air, increase the consumption of machine oil, because of causing motor, gap gas leakage is difficult for starting again during compression stroke, in acting, exhaust stroke, high-temp waste gas is gone here and there out from the gap, makes machine oil aging, blackening, in a word because the piston ring end clearance increase, caused motor to be difficult for starting, power descends, bad phenomenon such as oil consumption increase.

The improvement project that a kind of piston ring is arranged, promptly with two thin piston rings, and become the piston ring of a combination, peace with the time, the counterpart of two rings is staggered, and generally is 180 °, eliminates the counterpart gap with this and increases the problem that the back produces, but, can produce aforesaid harmful effect equally because in use two counterpart may overlap because of motion.Another kind of scheme is to adopt the mode of radial overlap in gap-clearance of piston rings place, and effect is better, but along with wearing and tearing, it is big that opening becomes, and air pressure produces radial pressure to taking end in the lap-joint, makes the piston ring distortion and causes gas leakage.Because problem promptly has all harmful effects after occurring, working life is shorter relatively.

The purpose of this utility model provides a kind of good airtight effect that still has after wearing and tearing, guarantee the compound piston ring of motor superperformance.

The technical solution of the utility model is: with the ring of two identical radial overlaps and become a piston ring, in last ring, take end one pin-and-hole is arranged, taking end outside encircling down has a pin-and-hole, and two pin-and-holes are relative and have a pin to be through in the pin-and-hole, makes ring and following ring counterpart differ several angle.

The pin-and-hole of last ring is positioned at takes end in the collar extension 45, takes end in 90 ° of angles of internal orifice outside the pin-and-hole of following ring is positioned at.

Owing to adopt pin, pin-and-hole, the relative position that encircles opening is up and down remained unchanged, again because the location-appropriate in battle pin hole up and down, following ring has strengthened taking in the last ring elastic force of end by pin, has offset the radial pressure that air pressure is internally taken the end generation.In addition, the set position of pin-and-hole in use can not produce harmful effect to piston ring.Therefore, the utility model is when may wear to other piston ring equal extent, and whole piston ring still has the good air-tightness energy, thereby has prolonged the working life of piston ring significantly, has improved the performance of motor.

Fig. 1 is embodiment of the present utility model.

Whole piston ring forms by ring (2) under the last ring (1) is folded mutually, last ring (1) is radial overlap with the counterpart of encircling (2) down, in last ring (1), take end (3), with interior a pin-and-hole (5) arranged from collar extension (4) 45, take end (6) at following ring (2) outer and with interior a pin-and-hole (8) arranged from (7) 90 ° of angles of internal orifice, last ring (1) is with down ring (2) pin-and-hole is relative, and has a pin to be through at wherein, makes ring (1) and the following counterpart of encircling (2) several angle that fixedly staggers.In the course of the work, the air pressure of engine chamber directly produces pressure to last ring (1), because encircling counterpart up and down staggers and dowel fixes is arranged, air-tightness is good, when the piston ring external diameter is diminished, the counterpart gap increases, and air pressure can be taken radial pressure of end (3) generation in to last ring (1) at the counterpart gap location of last ring (1), take end (3) in this encircles at present and makes by pin and keep outside elasticity, thereby guarantee performance good air-tightness energy.The big I of pin-and-hole is determined according to the width of ring plate, can be to penetrate also can not penetrating of ring plate, and the position is to be advisable in the centre of ring plate width.

The utility model also can be used in other equipment with piston and piston ring.

Claims (2)

1. the compound piston ring on the fuel engine, ring by two identical radial overlaps is formed, it is characterized in that: taking end (3) in last ring (1) has pin-and-hole (5), at the outer end (6) of taking that encircles (2) down pin-and-hole (8) is arranged, and two pin-and-holes are relative and have a pin to be through in the pin-and-hole.

2. compound piston ring as claimed in claim 1 is characterized in that: what pin-and-hole (5) was positioned at ring (1) takes end (3) in collar extension (4) 45, and pin-and-hole (8) is positioned at the outer end (6) of taking of ring (2) down in (7) 90 ° of angles of internal orifice.

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