CN101907034A

CN101907034A - Piston group with all-seal piston ring

Info

Publication number: CN101907034A
Application number: CN 201010255927
Authority: CN
Inventors: 麦镇荣
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-08-17
Filing date: 2010-08-17
Publication date: 2010-12-08

Abstract

The invention discloses a piston group with an all-seal piston ring, comprising a piston and a piston ring embedded in a ring channel arranged on the piston, wherein the piston ring comprises a main ring and an auxiliary ring which are independent with each other; the main ring is a C-shaped ring body with a join-aperture gap, the inner circumference of the ring body is provided with a skirt rim perpendicular to the ring body, and the skirt rim is fixedly connected with the ring body; the auxiliary ring is a C-shaped ring with a join-aperture gap, and the size of the side of the inner circumference of the auxiliary ring is matched with the size of the side of the outer circumference; the auxiliary ring is sleeved out of the skirt rim of the main ring; the joint included angle alpha between the join-aperture gap of the main ring and the join-aperture gap of the auxiliary ring is smaller than or equal to 5 degrees and larger than 0 degree; and after the main ring is sleeved with the auxiliary ring, the lower end plane of the ring body of the main ring, the upper end plane of the auxiliary ring, the side of the outer circumference of the skirt rim of the main ring and the side of the inner circumference of the auxiliary ring are integrated into a whole in the mode of welding or hot melting. The invention has the characteristics of good sealing performance and durability.

Description

The piston set that has all-seal piston ring

Technical field

The present invention relates to technical field of engines, be specifically related to a kind of piston set that has all-seal piston ring.

Background technique

Piston set is one of main accessory in the motor, and it mainly is made up of parts such as piston, piston ring, wrist pins.Piston is generally cylinder, and is divided into head, skirt section and three parts of piston pin boss.The head of piston offers the multiple tracks circuit, and piston ring is installed in the circuit, in case leak-stopping gas and prevent that machine oil from entering the firing chamber.The piston skirt is in the lower part of piston branch, and its effect is to keep piston vertical attitude in to-and-fro motion, the just targeting part of piston as far as possible.Piston pin boss is positioned at the top of piston skirt, is the supporting portion that piston is connected with connecting rod by wrist pin.Piston ring is the vitals of reciprocating machine, and the quality of its performance directly influences the reliability of motor, economical and working life.The notification number that applicant obtained on February 9th, 2005 is that the patent of invention of CN2677643Y discloses a kind of " all-seal piston ring " it is made of two main rings independent of each other and inner loop.Wherein, wherein main ring has a C shape ring body, and the inner circumference place of ring body is provided with a shirt rim vertical with ring body, and shirt rim and ring body nest together by drive fit; Inner loop is a C shape ring, and inner loop is placed in outside the shirt rim of main ring.Though the technical program can improve the sealing of piston ring, but still existence needs improvements: 1, connect by friction tight mode between main ring and the inner loop, the intensity of the piston ring of Xing Chenging is less relatively thus, and in the piston motion process, slide easily between main ring and the inner loop and the generation fretting wear, and easily cause the counterpart gaps of two rings overlapping.Even if prevent the generation of above-mentioned phenomenon at the positioning device on main ring shirt rim and inner loop, but still small size play can occur between two rings, like this at the main ring that offers the location notch

Just be worn and attenuation easily on its locating point at two rings, particularly easier fracture the in notch place, location.

When serious even the problem of major and minor ring fracture can occur.2, the qualification effect by positioning convex on the main ring and the location notch on the inner loop, allow the counterpart gap of inner loop as far as possible near relatively to the notch place, location of weakness, these arm of forces that will allow angle between main ring counterpart gap and the inner loop counterpart gap increase between big, the two ring counterpart gaps increase, thereby cause radially fractureing of piston ring easilier.3, the existing piston ring generally all is installed in the top compression ring groove, and the suffered impact force of piston ring is big like this, fractures easily.

Summary of the invention

Technical problem to be solved by this invention provides a kind of good seal performance, and the more durable piston set that has all-seal piston ring.

For addressing the above problem, the piston set that has all-seal piston ring that the present invention is designed comprises piston and is embedded in the interior piston ring of offering on the piston of circuit; Described piston ring by two so must you independently main ring and inner loop form, wherein main ring is the C shape ring body that has the counterpart gap, the inner circumference place of ring body is provided with a shirt rim vertical with ring body, shirt rim and ring body are fixed with one; Inner loop is the C shape ring that has the counterpart gap, match with the size of the excircle side of main ring shirt rim in the inner circumference side of inner loop, the excircle side of inner loop is identical with the excircle side size of main ring ring body, the distance of the upper-end surface of inner loop to lower end surface is the distance that thickness equals the lower end surface of main ring ring body to the lower end surface of main ring shirt rim, inner loop is socketed on outside the shirt rim of main ring, mouthful angle α that takes between the counterpart gap of main ring and the counterpart gap of inner loop is 0 °＜α≤5 °, after main ring and inner loop socket are finished, between the lower end surface of main ring ring body and the upper-end surface of inner loop, and/or be fixed with one by welding or hot melting mode between the inner circumference side of the excircle side of main ring shirt rim and inner loop.

Subsides place mutually of described main ring of such scheme and inner loop, promptly the excircle side of the upper-end surface of the lower end surface of main ring ring body, inner loop, main ring shirt rim, and the inner circumference side of inner loop be smooth surface.

In the such scheme, described welding manner is butt-joint.

The point of application of force of the described welding of such scheme is positioned at the upper-end surface of main ring ring body and the lower end surface of inner loop.

In the such scheme, described hot melting way is sintering or laser hot melt.

Mouthful angle α that takes between the counterpart gap of the described main ring of such scheme and the counterpart gap of inner loop is 1 °＜α≤3 °.

The circuit of offering on the described piston of such scheme comprises 1 oil ring groove and 2～3 compressions that are positioned at relative top that are positioned at relative below, and piston ring is arranged in the compression near oil ring groove.

The present invention compared with prior art, not only by reduce angle between main ring counterpart gap and the inner loop counterpart gap reduce between the two counterpart gaps the arm of force, avoided radially fractureing of piston ring; And changed means of fixation between main ring and the inner loop, and and both are fixed with one by welding or hot melting mode, so just can effectively avoid two mutual play and wearing and tearing between encircling, increased the intensity of piston ring self; Cancelled the intensity that causes the positioning device a little less than the relative thin on main ring and the inner loop in the prior art, improved main ring and inner loop in addition; During installation, piston ring is installed in second road or the 3rd near oil ring in compression but not in the top compression ring groove, under the prerequisite of equality strength piston ring, can reduces the suffered impact force of piston ring greatly, improve its serviceability, prolong life-span of piston ring.

Description of drawings

Fig. 1 is the sectional view of a kind of preferred embodiment of the present invention;

Fig. 2 is that the A-A of Fig. 1 is to sectional view;

The main ring structural drawing that Fig. 3 tilts for the counterpart gap;

The inner loop structural drawing that Fig. 4 tilts for the counterpart gap.

Number in the figure is: 1, piston; 11, circuit; 111, oil ring groove; 112, compression; 2, piston ring; 21, main ring; 211, ring body, 212, the shirt rim; 22, inner loop; 23, counterpart gap; 3, wrist pin.

Embodiment

The piston set that the present invention is a kind of to have an all-seal piston ring as shown in Figure 1, it mainly is made up of parts such as piston 1, piston ring 2, wrist pins 3.Piston 1 structure commonly used in piston 1 and the prior art is identical, and it is generally cylinder, and is divided into three parts such as head, skirt section and piston pin boss.The head of piston 1 offers circuit 11, and piston ring 2 is installed in the circuit 11, in case leak-stopping gas and prevent that machine oil from entering the firing chamber.Piston 1 skirt section then is in the bottom of piston 1, and its effect is to keep piston 1 vertical attitude in to-and-fro motion, the just targeting part of piston 1 as far as possible.Piston pin boss is positioned at the top in piston 1 skirt section, is the supporting portion that piston 1 is connected with connecting rod by wrist pin 3.As shown in Figure 2, so must you that independently main ring 21 and inner loop 22 are formed by two for piston ring 2.Wherein main ring 21 is for having the C shape ring body 211 in counterpart gap 23, and the inner circumference place of ring body 211 is provided with a shirt rim 212 vertical with ring body 211, and shirt rim 212 and ring body 211 are fixed with one.Inner loop 22 is for having the C shape ring in counterpart gap 23.Square cut or inclined cut can be carried out in the counterpart gap 23 of main ring 21 and inner loop 22 when cutting.When square cut is carried out in counterpart gap 23, the upper-end surface of formed counterpart gap 23 vertical and main ring 21 ring bodies 211 or inner loop 22; When inclined cut was carried out in counterpart gap 23, formed counterpart gap 23 formed certain included angle with the upper-end surface of main ring 21 ring bodies 211 or inner loop 22, sees Fig. 3 and Fig. 4 for details.Match with the size of the excircle side of main ring 21 shirt rims 212 in the inner circumference side of inner loop 22, the excircle side of inner loop 22 is identical with the excircle side size of main ring 21 ring bodies 211, and the distance of the upper-end surface of inner loop 22 to lower end surface is the distance that thickness equals the lower end surface of main ring 21 ring bodies 211 to the lower end surface of main ring 21 shirt rims 212.

Inner loop 22 is socketed on outside the shirt rim 212 of main ring 21, during socket, mouthful angle α that takes between the counterpart gap 23 of main ring 21 and the counterpart gap 23 of inner loop 22 is 0 °＜α≤5 °, after main ring 21 and inner loop 22 sockets are finished, be fixed with one by welding or hot melting mode between the lower end surface of main ring 21 ring bodies 211 and the upper-end surface of inner loop 22 and/or between the inner circumference side of the excircle side of main ring 21 shirt rims 212 and inner loop 22.Above-mentionedly take the folded angle of center line that mouthful angle α is not two counterpart gaps 23, but the formed angle in close limit in two counterpart gaps 23, owing to take diminishing of mouthful angle α, make the two counterpart gaps of encircling 23 can be positioned at the same side on the circumference, main ring 21 just can shorten dramatically with the arm of force in the counterpart gap 23 of inner loop 22 like this, thereby can prevent radially fractureing of piston ring 2.In the present invention preferably implemented, mouthful angle α that takes between the counterpart gap 23 of described main ring 21 and the counterpart gap 23 of inner loop 22 was 1 °＜α≤3 °.When main ring 21 and inner loop 22 were connected by welding manner, the welding manner of employing was butt-joint.At this moment, the point of application of force of its welding can radially weld along the lower end surface of main ring 21 ring bodies 211 and the upper-end surface direction of inner loop 22; Also can allow the point of application of force of welding be positioned at the upper-end surface of main ring 21 ring bodies 211 and the lower end surface of inner loop 22.Because in the main ring 21 of piston ring 2 and the various course of working of inner loop 22, the size in its counterpart gap 23 all is to configure earlier afterwards to carry out otch, like this after main ring 21 and inner loop 22 combinations, the outer rim of its main ring 21 and inner loop 22 no longer is suitable for processing such as polishing, therefore in the preferred embodiment of the present invention, the point of application of force of its welding is positioned at the upper-end surface of main ring 21 ring bodies 211 and the lower end surface of inner loop 22.We are in the man-hour that adds of carrying out main ring 21 and inner loop 22 like this, can leave the polishing surplus in the upper-end surface of main ring 21 ring bodies 211 and the lower end surface of inner loop 22, like this after main ring 21 and inner loop 22 is by the welding combination, the upper-end surface of main ring 21 ring bodies 211 and the lower end surface of inner loop 22 can be polished into desired thickness with piston ring 2 by the mode of polishing, and eliminate weld mark simultaneously.When main ring 21 and inner loop 22 were connected by welding manner, the hot melting way of employing was sintering or laser hot melt.By the above-mentioned mode that is connected, main ring 21 and inner loop 22 are combined, formed like this piston ring 2 thickness, just become the form of fit combination by the form of existing main ring 21 ring bodies 211 and inner loop 22 thickness discrete combined, this has just increased the longitudinal strength of piston ring 2 to a certain extent, this can effectively intercept oil gas and enter the gap location that two rings paste mutually, the seal that improves piston ring 2, can prevent phase mutual friction and play between main ring 21 and the inner loop 22 again, avoid wearing and tearing between the two, prolonged working life.

In the present invention, subsides place mutually of main ring 21 and inner loop 22, promptly the excircle side of the upper-end surface of the lower end surface of main ring 21 ring bodies 211, inner loop 22, main ring 21 shirt rims 212, and the inner circumference side of inner loop 22 all can be smooth surface and get final product.So just, can save and on the phase veneer, offer raised or sunken positioning device, reduce the number of weak spot on the piston ring 2, thereby can significantly improve the crushing resistance of piston ring 2, further prolong the life-span of piston ring 2.In addition, the circuit of offering on the piston 1 used in the present invention 11 is more than 3, comprising 1 oil ring groove 111 and 2～3 compressions 112 are arranged, on the parallel side that is opened in piston 1 of oil ring groove 111 and compression 112, and oil ring groove 111 is opened in the below of compression 112, and described piston ring 2 is installed near 112 li of the compressions of oil ring groove 111, reduces pressure by top compression ring groove 112 like this, can reduce the impact force of high pressure, prevent that it from fractureing piston ring 2 of the present invention.

Claims

1. the piston set that has all-seal piston ring comprises piston (1) and is embedded in the interior piston ring of offering on the piston (1) (2) of circuit (11); So must you that independently main ring (21) and inner loop (22) are formed by two for described piston ring (2), wherein main ring (21) is for having the C shape ring body (211) in counterpart gap (23), the inner circumference place of ring body (211) is provided with a shirt rim (212) vertical with ring body (211), and shirt rim (212) are fixed with one with ring body (211); Inner loop (22) is for having the C shape ring in counterpart gap (23), match with the size of the excircle side of main ring (21) shirt rim (212) in the inner circumference side of inner loop (22), the excircle side of inner loop (22) is identical with the excircle side size of main ring (21) ring body (211), the distance of upper-end surface to the lower end surface of inner loop (22) is the distance that thickness equals the lower end surface of main ring (21) ring body (211) to the lower end surface of main ring (21) shirt rim (212), inner loop (22) is socketed on outside the shirt rim (212) of main ring (21), it is characterized in that: mouthful angle α that takes between the counterpart gap (23) of main ring (21) and the counterpart gap (23) of inner loop (22) is 0 °＜α≤5 °, after main ring (21) and inner loop (22) socket are finished, between the upper-end surface of the lower end surface of main ring (21) ring body (211) and inner loop (22), and/or be fixed with one by welding or hot melting mode between the inner circumference side of the excircle side of main ring (21) shirt rim (212) and inner loop (22).

2. according to the described piston set that has all-seal piston ring of claim 1, it is characterized in that: subsides place mutually of main ring (21) and inner loop (22), promptly the excircle side of the upper-end surface of the lower end surface of main ring (21) ring body (211), inner loop (22), main ring (21) shirt rim (212), and the inner circumference side of inner loop (22) be smooth surface.

3. according to claim 1 or the 2 described piston set that have all-seal piston ring, it is characterized in that: described welding manner is butt-joint.

4. according to the described piston set that has all-seal piston ring of claim 3, it is characterized in that: the point of application of force of welding is positioned at the upper-end surface of main ring (21) ring body (211) and the lower end surface of inner loop (22).

5. according to claim 1 or the 2 described piston set that have all-seal piston ring, it is characterized in that: described hot melting way is sintering or laser hot melt.

6. according to the described piston set that has all-seal piston ring of claim 1, it is characterized in that: mouthful angle α that takes between the counterpart gap (23) of main ring (21) and the counterpart gap (23) of inner loop (22) is 1 °＜α≤3 °.

7. according to the described piston set that has all-seal piston ring of claim 1, it is characterized in that: the circuit of offering on the piston (1) (11) comprises 1 oil ring groove (111) and 2～3 compressions (112) that are positioned at relative top that are positioned at relative below, and piston ring (2) is arranged on compression (112) lining near oil ring groove (111).