CN107327352B

CN107327352B - Combined piston ring with fixed-opening air leakage channel

Info

Publication number: CN107327352B
Application number: CN201710462115.6A
Authority: CN
Inventors: 周建平; 周林
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-06-09
Filing date: 2017-06-09
Publication date: 2023-08-25
Anticipated expiration: 2037-06-09
Also published as: CN107327352A

Abstract

The invention relates to a combined piston ring with a fixed-opening air leakage channel, belonging to the field of machinery. The invention comprises a piston, a piston ring and a cylinder wall, wherein the piston ring comprises an upper ring and a lower ring, the lower ring is composed of an outer ring and an inner ring which have the same thickness, the upper ring and the lower ring are combined and installed in a piston ring, the piston ring is respectively provided with a boss and a groove which are combined to form positioning mutually, and the openings are staggered and sealed. A low-air leakage channel for the combustion chamber to leak to the crankcase is arranged on the piston ring body, the plane of the piston ring groove and the cylinder wall. The leakage channel does not increase the leakage amount due to abrasion of the cylinder, the piston ring and the piston ring. Overcomes the defect of large air leakage of the piston ring opening of the prior engine, has simple structure and is easy to install.

Description

Combined piston ring with fixed-opening air leakage channel

Technical Field

The invention relates to the field of machinery, in particular to a combined piston ring with a fixed-mouth air leakage channel.

Background

At present, an engine piston ring (commonly known as a traditional piston ring) gradually increases an opening gap after a single-ring single-groove piston ring is worn, so that the air leakage to a crankcase is increased, the power is reduced, and the fuel consumption is increased. The piston ring, the cylinder barrel and the piston material are different in expansion caused by heat and contraction caused by cold, the new engine reserves an oversized piston ring opening gap, a large amount of gas is pushed to push the cylinder wall engine oil scraped by the upper piston ring and the lower piston ring to be atomized when the engine oil flows back to the crankcase, the atomized engine oil separator can not be thoroughly separated, the engine oil enters an engine air inlet channel to be sucked into the cylinder, so that the engine oil consumption is large, more pollutant particles are discharged, and a large amount of combustion exhaust gas particles enter the crankcase to enable the engine oil to be oxidized too quickly, so that the engine works in a vicious cycle.

The combined piston ring seals the opening to leak air, and engine oil on the cylinder wall scraped off from the middle of the two rings cannot return to the crankcase, so that a large amount of engine oil can flow into the combustion chamber to burn.

The existing new engines on the market cannot achieve the minimum air leakage of the piston ring opening due to the characteristics of material application and metal expansion and contraction, cannot meet the best performance requirement of the engine, have large consumption of a large amount of engine oil of the turbocharged engine, and seriously pollute the air environment.

Disclosure of Invention

In order to make up for the sealing defect of the piston ring of the existing engine, the invention provides the combined piston ring with the fixed-opening air leakage channel, which can reduce the air leakage of the standard opening of the existing piston ring by more than 50 percent, does not reduce the pressure of the cylinder because the abrasion opening of the piston ring and the cylinder wall is enlarged, and meets the best acting performance of the engine.

The technical scheme of the invention is as follows: the sealing scheme comprises a cylinder wall, a piston and a piston ring, wherein the piston ring comprises an upper ring 1, the lower ring comprises an outer ring 2 and an inner ring 3, and the upper ring and the lower ring are concentrically arranged in a ring groove. The inner side of the lower plane of the upper ring 1 is provided with a groove 6, the upper plane of the inner ring 3 is provided with a plane boss 7 which is connected with the groove 6, the inner side of the outer ring 2 is provided with an outer ring boss 9 which is connected with the opening of the inner ring 3 in an inserting way, so that the circumference positioning of the upper ring 1, the outer ring 2 and the inner ring 3 is formed. The upper ring 1 is staggered with the opening of the outer ring 2 to block the upper opening of the outer ring opening 5, the inner ring opening is staggered with the outer ring opening 5 to block the inner side of the outer ring opening 5, and the radial slot of the upper plane of the inner ring 3 is communicated with the opening of the upper ring 1 to form a gas leakage channel from the combustion chamber to the crankcase.

The leakage air quantity of the leakage air channel is less than 50% of the standard opening air quantity of the traditional piston ring, and the purpose of leakage air is that engine oil scraped by the piston ring returns to the crankcase. When the engine air inlet stroke runs down, the piston ring is jointed with the plane of the upper ring groove and the negative pressure is applied in the cylinder, the upper ring opening 8 is communicated with the crankcase, and engine oil scraped by the piston ring in the upper piston ring groove and the lower piston ring groove can be sucked into the combustion chamber through the upper ring opening 8, so that a large amount of engine oil burning phenomenon of the engine is caused.

Preferably, the leakage channel is embodied in the plane of the piston ring.

Preferably, the leakage channel is embodied on the outer circumference of the piston ring.

Further, the blow-by gas passage is implemented in the plane of the piston ring groove.

Further, the leakage path is implemented in the cylinder wall.

Compared with the prior art, the invention has the characteristics that: the existing piston ring opening structure is not changed, the reliability is good, the three rings are mutually and circumferentially positioned and combined into an integral structure, fixed-opening air leakage is realized, the air leakage is not increased because the piston ring abrasion opening is enlarged, and the air leakage is reduced by more than 50% in any engine standard opening gap. The power is enhanced, the fuel consumption is reduced, and the engine has high torque at low rotation speed. The side leakage gas is less, the reciprocating operation of the piston is stable, the abrasion in the cylinder is reduced, the service life of the engine is prolonged, and the noise is reduced. The atomization of engine oil scraped by the piston ring when gas pushes to the crankcase is reduced, and the consumption of the engine oil is reduced. The amount of combustion particulates and exhaust gas leaked to the crankcase is small, and the service life of engine oil is correspondingly prolonged. The reduction of engine oil atomization, the engine oil content of exhaust gas circulation in the cylinder is low, when the back of the valve and the combustion chamber form carbon deposition, the carbon deposition does not contain an engine oil drying state, once the layer is formed, the carbon deposition is dried and hardened and is asynchronous with the heat expansion and cold contraction of metal, and is automatically separated from the metal, and the combustion chamber does not form a large amount of carbon deposition, so that the problem of carbon deposition on the back of the valve of the direct injection engine is solved. The pressure of the cylinder is not reduced all the time, the optimal working state of the engine is maintained, and the energy conservation and the emission reduction are realized. In a word, a series of defects caused by large air leakage of the opening of the piston ring of the existing engine are overcome.

For a clearer description of an embodiment of the invention or of a prior art solution, reference will be made to the accompanying figure 1, which is used in the description of the embodiment or of the prior art, it being obvious that the drawing in the description is only one embodiment of the invention, and that other drawings can be obtained according to the drawing, without any inventive effort, for a person skilled in the art.

Fig. 1 is a schematic top view of a piston ring structure for sealing a cylinder with a piston according to the present invention.

Drawings

1 is an upper ring;

2 is an outer ring;

3 is an inner ring;

4 is radial slotting;

5 is an outer ring opening;

6 is a groove;

7 is a plane boss;

8 is an upper ring opening;

and 9 is an outer ring boss.

It should be noted that the present inventor is a repair person for many years, and the piston ring is manufactured by purchasing the original engine piston ring. In order to save the cost, the piston ring test is firstly carried out on a single-cylinder air-cooled motorcycle, and a plurality of piston ring tests without a leakage port structure are unsuccessful, because no fixed point concentrated leakage exists, and a large amount of engine oil is leaked into a combustion chamber. After the necessity of fixed-mouth air leakage is determined, tests of various structures of fixed-mouth air leakage are carried out, any bad phenomenon does not occur in the repeated engine dismantling test, the joint surface of the upper ring and the lower ring is not worn, the inner ring does not jump radially, and after the tests on the motorcycle are successful, the motorcycle is mounted on the engine of the following embodiment for testing.

Detailed Description

As shown in fig. 1, the upper ring 1 and the lower ring of the piston ring in this embodiment comprise an outer ring 2 and an inner ring 3, the outer ring 2 and the inner ring 3 have the same thickness, the upper ring 1 and the lower ring have the same thickness, the lower plane inner side groove 6 of the upper ring 1 is connected with the plane boss 7 of the lower inner ring 3, the inner side outer ring boss 9 of the outer ring 2 is connected with the opening of the inner ring 3 in an inserting way, and the radial slot 4 of the upper plane of the inner ring 3 and the opening 5 of the outer ring radially form an air leakage channel. The upper ring opening 8 and the outer ring opening 5 are staggered by 60 degrees, the upper ring opening 8 is designed on the outer ring boss 9, the radial runout of the inner ring 3 is prevented from being impacted by the air leakage of the upper ring 1, and the upper ring 1, the lower ring 2 and the inner ring 3 are concentrically designed and installed in a first ring groove of the piston race.

The engine oil consumption of the new engine is 3500 kilometers and 1 liter, and the engine oil consumption is gradually increased along with the increase of the number of driving mileage. Two sets of new piston rings are purchased, a first gas ring is taken, an inner groove is processed near a ring opening of the gas ring to serve as an upper ring, the inner side of a reserved inner boss is polished to serve as a lower ring, the outer side of the first gas ring of the original engine is polished, and a boss is processed at a corresponding position of an upper plane. The diameter of the piston head of the test engine is smaller than 0.80mm, the clearance between the piston and the cylinder wall in the middle of the cylinder barrel is 0.40mm, the standard clearance of the piston ring opening is 0.25mm, and the air leakage area of the piston ring opening is 0.10mm < 2 >. The radially opposite position of the upper plane of the inner ring and the opening of the outer ring: grooves with a width of 0.20mm and a depth of 0.25mm are formed. The upper corners of the groove outlets are chamfered, so that the dislocation and blockage of the groove and the opening of the outer ring are prevented. The first ring groove of the original engine is directly provided with the thickness of two layers of piston rings, and the piston rings are arranged in the ring grooves. The cylinder wall is directly applied without machining.

After the assembly, the engine has strong power, the liquid level of the oil level gauge of the vehicle running for 5000 km is not obviously reduced, the tail gas is not provided with unpleasant burnt oil smell, the engine air inlet channel is not provided with liquid engine oil, and the 10000 km engine oil consumption is not within 0.2 liter. The carbon deposit on the movable race roof has self-falling trace, the tail part of the exhaust pipe has no smoke black phenomenon, the engine sealing part has no engine oil leakage phenomenon, the driving engine is started to drive when the air temperature is low, the engine is not driven by the sound of accelerating the piston to knock a cylinder, and the vehicle inspection tail gas accords with the emission standard.

Claims

1. A combination piston ring with fixed-mouth air leakage channel, which is characterized in that: including last ring (1) and lower ring, lower ring is formed by outer loop (2) and inner ring (3) combination of equal thickness, goes up ring (1) and is provided with ring opening (8), and outer loop (2) are provided with outer loop opening (5), and go up ring (1) lower surface inboard and be equipped with recess (6), and inner ring (3) upper surface is equipped with plane boss (7), plane boss (7) and recess (6) joint, outer loop (2) inboard radially are equipped with outer loop boss (9), outer loop boss (9) peg graft with the opening of inner ring (3), go up ring opening (8) and set up the upper surface of outer loop boss (9), go up ring (1), outer loop (2) and inner ring (3) each other circumference location and form the combination piston ring, and radial slot (4) that inner ring (3) upper surface set up radially form the fixed-mouth passageway with outer loop opening (5), go up ring opening (8) and outer loop opening (5) and stagger 60 and set up, go up ring (2) and inner ring (3) concentric combination and install in a piston ring groove.