CN2103652U - Energy-saving closed piston and piston ring assembly - Google Patents

Abstract

The utility model relates to a piston and a piston ring which are important components in power machines and air compressors. Air leakage of the ring port and the ring circumference of the piston ring are two most important factors in factors affecting the air pressure in a cylinder. In the design, a small segment of follower ring is welded on one end of the piston ring, and the piston ring is arranged on the piston with a ring slot for the follower ring and can close gaps on the ring port automatically so as to prevent the air leakage of the ring port; the piston ring can also stop the rotating displacement of the piston ring in the ring slot so as to prevent the ring circumference air leakage because of the unequal abrasion between the outer margin of the piston ring and the inner wall of the cylinder, so that the pressure and the temperature of the air in the cylinder can be increased. The heat power can be used efficiently to achieve the goals of saving fuel oil, saving materials and improving power.

Description

Energy-saving closed piston and piston ring assembly

The design relates to diesel engine and the petrol engine in all machinery with piston and piston ring parts, particularly dynamic power machine.

Piston, piston ring and cylinder part are the important component parts of motor, and the quality of piston ring technical performance directly affects engine power performance.Piston ring is a kind of certain flexible opening annulus that has, and can be divided into compression ring and oil ring (following indication is a compression ring) by its effect; It must possess two performances: the one, and tightness, the 2nd, thermal conductivity, its tightness are meant that the pressurized gas that will guarantee in the cylinder does not bleed in the crankcase.When piston, piston ring and cylinder were worked under new state, the wear extent between parts was very little, and various gaps are suitable, therefore can guarantee the tightness in the cylinder well.But along with the prolongation of service time, the wear extent between piston, piston ring and the cylinder also increases thereupon; Wearing and tearing between piston ring outer rim and the cylinder inner wall cause the collar extension gap to increase; Wearing and tearing between piston ring and the piston ring groove cause the degrees of freedom of its rotation displacement in annular groove to increase; Inequality wearing and tearing between piston ring outer rim and the cylinder inner wall make its surface of contact lose circle; When piston ring rotates displacement in annular groove, lose between the round cylinder inner wall of round piston ring outer rim and mistake and just form all gaps of ring; And the uneven wear amount is big more, and it is just big more to lose circularity, and it is also just big more to encircle all gaps.The continuous increase in collar extension and all gaps of ring will make the original air-tightness of piston ring reduce gradually, cause the power of motor to descend, and oil consumption increases.

For addressing this problem, China's utility model patent (patent No.: 87205804.2) propose in the annular groove of piston, the opening of piston ring places a night bolt device, just can remedy the collar extension gap automatically; And can stop the rotation displacement of piston ring in annular groove, thereby avoid occurring all gaps of ring.But in the reality, because the piston ring position often is in high temperature, high-pressure work state, the spring in this device loses bullet gradually, and makes it be difficult to bring into play due effect.

The design's purpose is that a kind of improved envelope type piston and piston-ring packing of closing will be provided, and it can prevent the collar extension and the gas leakage of ring week of piston ring effectively.

The design's purpose is achieved in that a bit of follower ring of welding on the lower plane of piston ring one end, several roads annular groove is arranged on the piston cylndrical surface, certain position along per pass annular groove bottom mills out a little elongated slot as the follower ring annular groove, this piston ring that has follower ring is contained on the piston that has the follower ring annular groove, during work, the pressurized gas in the cylinder is stopped by following follower ring at the collar extension place and in the crankcase that can not bleed; Simultaneously follower ring plays the bayonet lock effect to piston ring in its annular groove, has stoped the rotation displacement of piston ring in annular groove effectively, from and can avoid occurring all gaps of ring, anti-stop ring week gas leakage.

The design only need weld a bit of follower ring at an end of piston ring and mill out a follower ring annular groove at certain position, piston ring annular groove bottom, so structure is very simple; Simultaneously, provide because the elastic force of follower ring is self elastic force by piston ring, during work, its elasticity and piston ring self elasticity is stable equally; And, because the design can guarantee the tightness in the cylinder effectively, just can not change component such as piston, piston ring and cylinder generally speaking for the excessive problem that causes of leaking gas, to reach the minimizing maintenance frequency, save the purpose of metallic material.

The design's concrete structure is provided by Figure of description.

Fig. 1 is according to the plan view that closes envelope type energy-saving piston and piston-ring packing of the design's proposition and the sectional drawing of cylinder block.Describe the details and the working condition of the concrete assembly that proposes according to the design in detail below in conjunction with Fig. 1.

Piston (2) is housed in cylinder block (1), several roads grooved rings (3) are arranged on the cylndrical surface of piston (2), piston ring (4) is housed in grooved ring (3), piston ring (4) has an opening (5), locate to be milled with a little elongated slot (6) at opening (5) along the bottom of annular groove (3), in elongated slot (6), be placed with a bit of follower ring (7), follower ring (7) go up the part on plane and piston ring (4) an end (8) below weld together.The position of per pass annular groove (3) bottom little elongated slot (6) answers circumference in equal parts to stagger successively, and each size of little elongated slot (6) should be fit to place follower ring (7), the same circumference of outer rim of the outer rim of follower ring (7) and piston ring (4).Piston among the figure (2) is in the working state of compression stroke.

Piston (2) is along in the compression stroke shown in the arrow (9), and the pressurized gas (10) between its top and the cylinder block (1) arrives collar extension (5) when locating through upper gap, is stopped by following follower ring (7) and in the crankcase that can not bleed downwards; Simultaneously, stoped the rotation displacement of piston ring (4) its annular groove (3) in effectively because follower ring (7) plays the bayonet lock effect at its annular groove (6) to piston ring (4), from and can avoid occurring all gaps of ring, anti-stop ring week leaks gas.

Claims (4)

1, closes envelope type energy-saving piston and piston-ring packing in power engine and the air compressor, the piston of this assembly (2) has several roads annular grooves (3) on the cylndrical surface, piston ring (4) is housed in the annular groove (3), piston ring (4) has an opening (5), it is characterized in that locating at opening (5), bottom along annular groove (3) is milled with a little elongated slot (6), is placed with a bit of follower ring (7) in the elongated slot (6), and the lower plane of the part on the last plane of follower ring (7) and an end (8) of piston ring (4) welds together.

2, assembly according to claim 1 is characterized in that the outer rim of follower ring (7) and the same circumference of outer rim of piston ring (4).

3, assembly according to claim 1 is characterized in that each size of little elongated slot (6) is fit to place follower ring (7).

4, assembly according to claim 1 is characterized in that the position circumference in equal parts of per pass annular groove (3) bottom little elongated slot (6) staggers successively.

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