CN2720196Y

CN2720196Y - Three-lap joint piston ring

Info

Publication number: CN2720196Y
Application number: CN 200420053344
Authority: CN
Inventors: 史学会
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-08-23
Filing date: 2004-08-23
Publication date: 2005-08-24
Anticipated expiration: 2014-08-23

Abstract

The split three-lap joint piston ring comprises a ring body which is circumferentially disconnected and is characterized in that two ends of an opening of the ring body are respectively longitudinally cut along the outer diameter on the ring surface to form step-shaped lap joint parts with the same shape and the opposite direction, and then half of the step-shaped lap joint parts are longitudinally cut along the length part of the inner diameter corresponding to the step to form another lap joint part with the same shape and the opposite direction. The utility model discloses respectively form two overlap joint portions at each end of ring body open-ended, the overlap joint portion shape at both ends is the same but opposite direction completely, and the overlap joint portion at both ends corresponds closely to cooperate during the use, has thoroughly blocked the piston ring to the upper and lower passageway and the piston ring internal diameter passageway of mouth department, and both way seal is overcome the phenomenon of revealing of mouth completely, and processing technology is simple.

Description

Counterpart three overlap joint piston rings

Technical field

The utility model belongs to the piston ring field, particularly a kind of counterpart three overlap joint piston rings.

Background technique

Piston ring is the main Sealing of machines such as internal-combustion engine, pressure fan and oil hydraulic cylinder, and it is a big defective of piston ring packing that the piston ring counterpart is revealed.China Patent No. 01243868.5 discloses the two overlap joint of a kind of counterpart piston ring, and to have processing technology simple, the characteristics that usability is good, its technological scheme is to be the opposite terraced steps of direction respectively along the circumferential outside at the two end part of the ring body that circumferentially disconnects, the corresponding precision-fit of two terraced steps.After piston is packed cylinder into, be two opposite terraced steps corresponding matching of direction, sealed along the axial leakage of piston ring, also sealed the inside and outside footpath of piston ring passage.But the two overlap joint rings of this counterpart belong to one-way sealing, have good usability under the one-way only operation pressure state, but also have certain problem under the two-way working pressure state.

Summary of the invention

Technical problem to be solved in the utility model provides a kind of counterpart three overlap joint piston rings, two way sealed, and sealing is thorough, and processing technology is simple.

Counterpart three overlap joint piston rings of the present utility model, the ring body that comprises circumferential disconnection, it is characterized in that going one along external diameter rip cutting on anchor ring respectively at the opening two ends of ring body, form the opposite step-like clinch of shape equidirectional, length part along the corresponding step of internal diameter vertically cuts half again, forms the opposite clinch of another shape equidirectional.

The utility model respectively forms two clinchs at each end of ring body opening, the clinch shape at two ends is identical but direction is opposite, the clinch correspondence at two ends closely cooperates during use, the last lower channel and the inside and outside footpath of the piston ring passage at piston ring counterpart place have thoroughly been blocked, two way sealed, the leakage phenomenon of counterpart is overcome fully.

Advantage of the present utility model:

Overcome the shortcoming of existing all piston ring counterparts gas leakage, also overcome the shortcomings of the two overlap joint ring of counterpart one-way sealing, made the sealing of piston ring more perfect, and other parts also be need not to change, energy-saving and environmental protection, prolonged mechanical life-span have all been made moderate progress.Be applicable to machineries such as internal-combustion engine, pressure fan, oil hydraulic cylinder.Processing technology is simple, and cost is low, long service life, and sealing is thorough, and through test, its sealing effect is the same good with new ring under the situation of experience wear 1mm outside ring body.Oil consumption does not increase, and power does not subtract.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the main TV structure schematic representation after docking;

Fig. 3 is the plan structure schematic representation after docking.

Among the figure: clinch 3,4 clinchs 5 ring bodies 6 overlap joint mouths on 1 time clinch 2

Embodiment

As Fig. 1, the circumferential ring body 5 that disconnects, an opening end at gap goes one along external diameter rip cutting on upper ring surface, go one at another opening end along external diameter rip cutting on following anchor ring, form shape equidirectional opposite step-like clinch 1 and last clinch 2 down like this, vertically cut half along the length part of the corresponding step of internal diameter respectively again, form another shape equidirectional opposite clinch 3 and clinch 4.The bent angle of step-like clinch both can be for rectangular-shaped also can be rectangular-shaped for arc transition, the processing of being more convenient for like this.The shoulder height of step-like clinch is preferably 1/2 (degree of depth that also is rip cutting be ring body thickness 1/2) of ring body thickness, and the mesa width of step is preferably the 65-70% of anchor ring overall width, also promptly goes up the 65-70% that clinch and following clinch account for the anchor ring overall width.

Blocked the last lower channel at counterpart place behind following clinch 1 and last clinch 2 overlap joints, following clinch 1 and clinch 4 overlap joints, clinch 3 and last clinch 2 overlap joints have been blocked collar extension place internal and external channel.Respectively take jointing and leave a certain amount of flexible gap.

Claims

1, a kind of counterpart three overlap joint piston rings, the ring body that comprises circumferential disconnection, it is characterized in that going one along external diameter rip cutting on anchor ring respectively at the opening two ends of ring body, form the opposite step-like clinch of shape equidirectional, length part along the corresponding step-like clinch of internal diameter vertically cuts half again, forms the opposite clinch of another shape equidirectional.

2, counterpart three overlap joint piston rings according to claim 1, the bent angle that it is characterized in that described step-like clinch is rectangular-shaped or is the rectangular-shaped of arc transition.

3, counterpart three overlap joint piston rings according to claim 1, the shoulder height that it is characterized in that described step-like clinch is 1/2 of a ring body thickness, the mesa width of step accounts for the 65-70% of anchor ring width.