CN208845279U - A kind of piston ring enhancing sealing function - Google Patents

Abstract

The utility model provides a kind of internal-combustion engine piston ring for enhancing sealing function, the piston ring is different from conventional section piston ring used at present, but single V or double V structures are designed to close to inner ring surface side by portion on the piston ring, make piston ring in cylinder by top high pressure gas active force under, piston ring lower surface and piston ring grooves are in close contact, and the active force from piston ring lower surface to piston ring grooves can be generated on the inclined-plane of V-structure to inner ring surface and to the component of outer ring surface, piston ring is pressed into the sealing that cylinder wall reinforces primary sealing area to the component of outer ring surface, it can make compression ring flexible deformation to the component of inner ring surface, reduce piston ring back clearance, achieve the effect that enhancing sealing.

Description

A kind of piston ring enhancing sealing function

Technical field

The utility model relates to the piston sealing structures of engine, and in particular to a kind of piston ring for enhancing sealing function.

Background technique

Piston ring is a kind of with the larger metallic elastic ring for expanding outwardly deformation, belongs to the core of engine interior Part, it is mounted in its corresponding piston groove of section.Piston ring is divided into two kinds according to function: compression ring and oil ring.Compression ring Effect is the sealing guaranteed between piston and cylinder, prevents the high temperature in cylinder, high-pressure gas from largely leaking into crankcase, while will also Most of heat of top land is transmitted to cylinder wall, then is taken away by cooling water or air.During the work time, reciprocal and rotation The piston ring of movement, by the pressure difference of top and the bottom gas, in a side of compression ring periphery and cylinder and ring and annular groove Between formed sealing.In a free state, outside diameter is slightly larger than cylinder diameter to piston ring, so ring just generates after being packed into cylinder Certain elastic force compresses with casing wall, forms primary sealing area.The gas of piston ring back clearance and sideshake is scurried into, back pressure is generated And lateral pressure, it compresses ring further to casing wall and annular groove, substantially enhances the sealing of the first and second sealing surface.This is compression ring Second sealing.Since the burning of mixed gas in engine cylinder is carried out in a closed space, sealing performance It is good with the bad amount of work for directly determining engine mixed gas body, also influence the output power and torque of engine, finally Influence the fuel consumption rate of engine.

In order to improve the leakproofness of compression ring, compression ring is usually designed to different planforms.Currently, it is common have straight-flanked ring, Twist type ring, keystone ring, bucket face ring, cambridge ring, single-hook ring, outer shoulder twist type ring, inner chamfer twist type ring etc., but these compression rings are in reality There is different degrees of disadvantage in the application of border.For example, straight-flanked ring is with can be the machine oil in cylinder wall surface not when reciprocating motion of the pistons It forfeits in cylinder, causes consumption of lubricating oil too fast；Meanwhile mostly in the design process be designed for outer ring surface, for interior The research of anchor ring is less.

With the continuous improvement to the duty of engine and environmental requirement, being born steel high power piston ring and is combined various Advanced process for treating surface and new structural continuous application, the function of piston ring greatly improve.

Utility model content

The purpose of this utility model is to provide a kind of piston rings for enhancing sealing function, are answering in conjunction with the design of the above compression ring The problems in, this paper needle devises a kind of compression ring of completely new enhancing sealing function, using double V-shaped or single V-structure, benefit With the pressure difference of compression ring during the work time, it is deformed compression ring radial force, reduces back clearance, to enhance piston ring packing Property.

In order to achieve the above object, the utility model is achieved through the following technical solutions:

There is provided a kind of piston ring for enhancing sealing function, the top of piston ring is formed with radial section and is positive the structure of V-type.

Preferably, the lower part of the piston ring is formed with the structure that radial section is inverted V type.

Preferably, the quantity of the structure of the positive V-type is one or more.

Preferably, the quantity of the structure of the inverted V type is one or more.

Preferably, the structure of the positive V-type is located at piston ring top close to the side of inner ring surface.

Preferably, the structure of the inverted V type is located at piston ring lower part close to the side of inner ring surface.

Preferably, the piston ring is that the compression ring sealed between piston and cylinder is realized in engine.

Preferably, the piston ring is as the top compression ring being embedded in upper piston area groove, and/or as being embedded in Second gas ring in piston lower portion groove.

Preferably, the piston ring is metallic elastic ring.

Preferably, the piston ring bears the active force of its top high pressure gas, makes piston ring lower surface and the piston ring Embedded groove is in close contact, and the active force can be generated on the inclined-plane of positive V-structure to inner ring surface and to outer ring surface Component.

Piston ring is pressed into the sealing that cylinder wall reinforces primary sealing area to the component of outer ring surface, it can to the component of inner ring surface Make compression ring flexible deformation, reduce piston ring back clearance, achievees the effect that enhancing sealing.

Compared with the prior art, the utility model has the following advantages:

1. the utility model can be effectively improved the leakproofness of cylinder, the fuel consumption rate of engine is reduced, improves automobile And the fuel economy of other equipment engine apparatus.

2. the utility model provides a kind of innovative design of piston ring, this design reduces the quality of piston ring, thus The inertia of reciprocating motion of the pistons is reduced, it is final to improve the vibration of engine during the work time.Reduce the damage of raw material simultaneously Consumption, reduces the manufacturing cost of piston ring.

3. the utility model enhances the leakproofness of cylinder, high temperature, the high-pressure gas effectivelying prevent in cylinder are largely leak into Crankcase, to prevent the deterioration of machine oil rotten.

4. the utility model reduces the air leakage of in-cylinder combustion gas, the amount of work of gas in the jar is increased, makes to start Machine power and torque get a promotion.

Detailed description of the invention

Fig. 1 is a kind of double V-shaped overall structure diagram of piston ring for enhancing sealing function of the utility model.

Fig. 2 is a kind of piston ring list V-type overall structure diagram for enhancing sealing function of the utility model.

Fig. 3 is a kind of double V-shaped embodiment partial schematic sectional view of piston ring for enhancing sealing function of the utility model.

Fig. 4 is a kind of piston ring list V-type embodiment partial schematic sectional view for enhancing sealing function of the utility model.

Fig. 5 is that a kind of piston ring for enhancing sealing function of the utility model is double V-shaped in engine compresses-acting-exhaust row The stress diagram of journey.

Fig. 6 is a kind of piston ring list V-type for enhancing sealing function of the utility model in engine compresses-acting-exhaust row The stress diagram of journey.

Specific embodiment

The utility model is done further by the way that a preferably specific implementation case is described in detail below in conjunction with attached drawing It illustrates.

As shown in Fig. 1, a kind of piston ring enhancing sealing function uses double V-shaped structure, radial section section view knot Structure is as shown in Fig. 3, it is integrally mounted in its corresponding 13 groove of piston of section, and is embedded in 13 upper groove of piston Piston ring is embedded in the piston ring of lower channel as second gas ring 14 as top compression ring 12.Two piston petticoats It is compressed with cylinder sleeve 11, forms primary sealing area, inner ring surface further compresses ring groove shape and seals at second.Double V-shaped piston The structure 17 of two positive V-types is presented close to the radial section of piston ring inner ring surface side for the top of ring, and lower part is in piston ring The structure 18 of an inverted V type is presented in the radial section of anchor ring side.

As shown in Fig. 5, a kind of double V-shaped structurally live plug ring enhancing sealing function provided by the utility model, is starting In machine compression, acting and instroke, due to the mistake of 14 top burning fuel of piston ring top compression ring 12 and second gas ring Pressure is higher in journey, and piston ring upper surface will receive downward active force, and piston ring lower surface and piston ring grooves are in close contact； And V-structure 17 is since there are inclined-plane, piston ring upper surface, can be the two of V-structure 17 in the pressure acted on downwards Radial horizontal component is generated on a inclined-plane, i.e., to inner ring surface and to the component of outer ring surface.To outer ring surface component by piston ring Top compression ring 12 and second gas ring 14 press to the sealing that cylinder wall reinforces primary sealing area, can make gas to the component of inner ring surface Ring resilience deformation, reduces compression ring back clearance, to enhance sealing of the piston ring to cylinder.For compression travel, due to close Envelope property improves, and reduces the air leakage of the fresh momentum of engine；For working stroke, the air leakage of in-cylinder combustion gaseous mixture Reduction directly increases the amount of work of engine.

As shown in Fig. 2, another scheme of the utility model is to enhance the piston ring of sealing function using single V-type Structure, radial section sectional structure are similar to double V-shaped structure described in attached drawing 3.The difference is that the top of single V-type piston ring is leaned on The structure 17 of a positive V-type is presented in the radial section of nearly piston ring inner ring surface side, and lower part is close to piston ring inner ring surface side The structure 18 of an inverted V type is presented in radial section, as shown in Fig. 4.

As shown in Fig. 6, working principle class of single V-structure piston ring in engine compresses, acting and instroke It is similar to Fig. 5.Along single V-structure inclined-plane generate to inner ring surface and to the component of outer ring surface, to outer ring surface component by piston ring The sealing that cylinder wall reinforces primary sealing area is pressed to, compression ring flexible deformation can be made to the component of inner ring surface, reduce compression ring back clearance, from And enhance sealing of the piston ring to cylinder.For compression travel, since leakproofness improves, reduce the fresh punching of engine The air leakage of amount；For working stroke, the air leakage reduction of in-cylinder combustion gaseous mixture directly increases the acting of engine Amount.

It is discussed in detail although the content of the utility model has passed through above preferred embodiment, but it should be appreciated that on The description stated is not considered as limitations of the present invention.After those skilled in the art have read above content, for A variety of modifications and substitutions of the utility model all will be apparent.Therefore, the protection scope of the utility model should be by appended Claim limit.

Claims (7)

1. a kind of piston ring for enhancing sealing function, which is characterized in that the top of piston ring is formed with radial section and is positive V-type Structure；

The lower part of the piston ring is formed with the structure that radial section is inverted V type；

The piston ring is that the compression ring sealed between piston and cylinder is realized in engine, and as being embedded in upper piston area groove Interior top compression ring, and/or as the second gas ring being embedded in piston lower portion groove.

2. a kind of piston ring for enhancing sealing function as described in claim 1, which is characterized in that the structure of the positive V-type Quantity is one or more.

3. a kind of piston ring for enhancing sealing function as described in claim 1, which is characterized in that the structure of the inverted V type Quantity is one or more.

4. a kind of piston ring for enhancing sealing function as claimed in claim 1 or 2, which is characterized in that the structure of the positive V-type Positioned at piston ring top close to the side of inner ring surface.

5. a kind of piston ring for enhancing sealing function as claimed in claim 1 or 3, which is characterized in that the structure of the inverted V type Positioned at piston ring lower part close to the side of inner ring surface.

6. a kind of piston ring for enhancing sealing function as described in claim 1, which is characterized in that the piston ring is metal elastic Property ring.

7. a kind of piston ring for enhancing sealing function as described in claim 1, which is characterized in that the piston ring is born thereon The active force of square high pressure gas is in close contact groove embedded by piston ring lower surface and the piston ring, and the active force It can be generated on the inclined-plane of positive V-structure to inner ring surface and to the component of outer ring surface.