CN207568724U

CN207568724U - A kind of good two-layer piston ring of air-tightness

Info

Publication number: CN207568724U
Application number: CN201721669290.4U
Authority: CN
Inventors: 张雷
Original assignee: Chongqing Static Thai Locomotive Parts Co Ltd
Current assignee: Chongqing Static Thai Locomotive Parts Co Ltd
Priority date: 2017-12-04
Filing date: 2017-12-04
Publication date: 2018-07-03
Anticipated expiration: 2027-12-04

Abstract

A kind of good two-layer piston ring of air-tightness, including the first ring body and the second ring body, the two mutually fastens setting.The surface of first ring body is equipped with protrusion, and the binding face of second ring body and the first ring body is equipped with and the matched groove of protrusion.First ring body is a non-enclosed annulus for being equipped with opening with the second ring body, and one end of the ring body is equipped with convex block, and the tail portion of the convex block is arc-shaped, and convex block forms L-shaped structure with ring body, and the other end of the ring body is equipped with the notch coordinated with convex block.The inside of the ring body is equipped with rubber groove, and the seam allowance of the rubber groove and the opening of ring body are misaligned, and also embedded with rubber ring in the rubber groove, the outside of the ring body is equipped with polytetrafluoroethylene ethylene layer.The utility model is simple in structure, and the convex block tail portion at ring body opening closure is arc-shaped, and when piston ring is closed due to itself is expanded, the convex block of arc-shaped is easier the indentation, there into the ring body other end.

Description

A kind of good two-layer piston ring of air-tightness

Technical field

The utility model is related to a kind of piston ring, the good two-layer piston ring of especially a kind of air-tightness.

Background technology

Piston ring is mainly used in the internal combustion engine of gasoline engine, diesel engine, engineering machinery, water pump etc., and main function is to protect The sealing between piston and cylinder wall is held, the chemical energy of fuel is changed into mechanical energy.Conventional piston ring is mounted on engine air After in cylinder sleeve, there are certain end-gaps in two end faces of opening, though this gap is small, can be described as one completely it is open Channel.Under engine condition, due to the abrasion of piston ring and cylinder wall, end-gaps increase between also making collar extension, pressure Contracting gas and outburst gas, will scurry into crankcase, while lubricating oil also can scurry into combustion chamber from collar extension, so as to make at collar extension Engine compression ratio reduces, and output power reduces, and lubricating oil increase, service life reduces, and piston ring closes due to because expansion During conjunction, be at the closure usually it is rectangular-shaped caused by be closed be in be not closed completely in the case of with regard to contradicting Phenomenon, even results in piston ring damage, and gas leakage oil leakage phenomenon occurs for cylinder.The individual layer class that existing piston ring has one ring of a slot is lived Plug ring, the abrasion of individual layer class piston ring constantly aggravate, and often opening can gradually increase.

Utility model content

In view of the above shortcomings of the prior art, the utility model provides a kind of good two-layer piston ring of air-tightness.

To achieve the above object, the technical solution adopted in the utility model is：A kind of good two-layer piston ring of air-tightness, packet The first ring body and the second ring body are included, the two mutually fastens setting.The surface of first ring body is equipped with protrusion, second ring body It is equipped with and the matched groove of protrusion with the binding face of the first ring body.First ring body is one with the second ring body and is equipped with The non-enclosed annulus of opening, one end of the ring body are equipped with convex block, and the tail portion of the convex block is arc-shaped, and convex block and ring body L-shaped structure is formed, the other end of the ring body is equipped with the notch coordinated with convex block.The inside of the ring body is equipped with rubber groove, The seam allowance of the rubber groove and the opening of ring body are misaligned, and rubber ring is also embedded in the rubber groove, the ring body Outside is equipped with polytetrafluoroethylene ethylene layer.

Preferably, the thickness of the convex block and notch is the 1/3-1/2 of ring body thickness.

Preferably, the aperture position of first ring body and the second ring body is staggered.

The utility model is simple in structure, and the convex block tail portion at ring body opening closure is arc-shaped, in piston ring because itself is swollen It is swollen and when being closed, the convex block of arc-shaped is easier the indentation, there into the ring body other end, while loop design can make piston ring Air-tightness it is more preferable, and rubber ring on sealing function with piston ring cooperate.

Description of the drawings

Fig. 1 is the structure diagram of the utility model ring body.

Fig. 2 is the structure diagram of the first ring body.

Fig. 3 is the structure diagram of the second ring body.

Fig. 4 is the sectional view of the A-A in Fig. 1.

Fig. 5 is ring body convex block and the structure diagram of indentation, there.

In figure, 1- ring bodies；2- rubber grooves；3- convex blocks；4- notches；5- polytetrafluoroethylene ethylene layers；6- rubber rings；7- second Ring body；8- protrusions；9- grooves.

Specific embodiment

The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out Clearly, it is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without making creative work All other embodiments obtained shall fall within the protection scope of the present invention.

As Figure 1-Figure 5：The good two-layer piston ring of a kind of air-tightness, including the first ring body 1 and the second ring body 7, the two Mutually fasten setting.The surface of first ring body 1 is equipped with protrusion 8, on the binding face of 7 and first ring body 1 of the second ring body Equipped with raised 8 matched grooves 9.First ring body, 1 and second ring body 7 is a non-enclosed circle for being equipped with opening Ring, and the aperture position of the first ring body 1 and the second ring body 7 is staggered.One end of the ring body 1 is equipped with convex block 3, the convex block 3 Tail portion is arc-shaped, and convex block 3 forms L-shaped structure with ring body 1, and the other end of the ring body 1 is equipped with to be lacked with what convex block 3 coordinated Mouth 4.The inside of the ring body 1 is equipped with rubber groove 2, and the seam allowance and the opening of ring body 1 of the rubber groove 2 are misaligned, institute It states also embedded with rubber ring 6 in rubber groove 2, the outside of the ring body is equipped with polytetrafluoroethylene ethylene layer 5.

Be mostly rectangular-shaped at traditional piston ring closure, in closing course is expanded because of piston ring, matching not pair when, hold Easily occur to contradict in advance, even result in and be broken at the closure of piston ring, so that the air-tightness of cylinder cannot ensure.This reality With novel, the tail portion of convex block 3 is arc-shaped at a kind of opening closure of the good two-layer piston ring of air-tightness, in ring body 1 because of itself When expansion is closed, the convex block 3 of arc-shaped is easier into the notch 4 of 1 other end of ring body, and in work between convex block 3 and notch 4 Plug ring will not occur to contradict in advance before being closed completely.And the utility model is Double decker piston ring structure, the first ring body 1 and the Two ring bodies 7 mutually fasten setting, and the protrusion 8 on buckling surface and groove 9 can prevent opening for the first ring body 1 and the second ring body 7 Mouth position overlaps, and ensure that the air-tightness of piston ring entirety, while when 7 serious wear of the first ring body 1 or the second ring body When, another ring body can also continue to maintain the airtight effect of piston ring, avoid the problem of traditional monocyclic damage can not just work. Polytetrafluoroethylene (PTFE) has the characteristics that heat safe, its friction coefficient is extremely low, so lubricating action can be made, the outside of piston ring and gas Usually piston ring is caused to be easily damaged, polytetrafluoroethylene ethylene layer 5 can make Service Life of Piston Ring because friction is severe between cylinder More permanent, rubber ring and piston ring positioned at 1 inner rubber groove 2 of ring body interact, and can play the role of damping, together When rubber ring and piston ring cooperate, the air-tightness for making piston ring is more preferable.

Claims

1. a kind of good two-layer piston ring of air-tightness, it is characterised in that：Including the first ring body and the second ring body, the two mutually fastens Setting；The surface of first ring body is equipped with protrusion, and the binding face of second ring body and the first ring body is equipped with and raised phase The groove of cooperation；First ring body and the second ring body are a non-enclosed annulus for being equipped with opening, and the one of the ring body End is equipped with convex block, and the tail portion of the convex block is arc-shaped, and convex block forms L-shaped structure with ring body, and the other end of the ring body is set There is the notch coordinated with convex block；The inside of the ring body is equipped with rubber groove, the seam allowance of the rubber groove and opening for ring body Mouth is misaligned, and also embedded with rubber ring in the rubber groove, the outside of the ring body is equipped with polytetrafluoroethylene ethylene layer.

2. a kind of good two-layer piston ring of air-tightness as described in claim 1, it is characterised in that：The thickness of the convex block and notch Spend the 1/3-1/2 for ring body thickness.

3. a kind of good two-layer piston ring of air-tightness as described in claim 1, it is characterised in that：First ring body and second The aperture position of ring body is staggered.