CN204060960U

CN204060960U - A kind of internal combustion engine structure

Info

Publication number: CN204060960U
Application number: CN201420470563.2U
Authority: CN
Inventors: 周继斌
Original assignee: Individual
Current assignee: Individual
Priority date: 2014-08-20
Filing date: 2014-08-20
Publication date: 2014-12-31
Anticipated expiration: 2024-08-20

Abstract

The utility model discloses a kind of internal combustion engine structure, comprises piston, and piston is made up of head and skirt section; At least arrange two oil grooves at piston crown, these two oil grooves mate formation two oil depot with piston ring and cylinder sleeve, and under working state, lubricant oil is mutual circulation between two oil depots.It is abundant that the utility model can make piston assembly lubricate with cooling, reduces fit up gap, the sealing of enhanced burning room, improving combustion efficiency simultaneously.

Description

A kind of internal combustion engine structure

Technical field

The utility model relates to technical field of internal combustion engines, refers in particular to a kind of internal combustion engine structure.

Background technique

Piston assembly comprises piston, piston ring, wrist pin and cylinder sleeve, is the nucleus movement part of internal-combustion engine, is energy consumption, disposal of pollutants source of generation, plays a leading role to power performance and reliability.

Sharp-pointed along with environmental protection and problem of energy crisis, improves constantly the quality requirements of piston assembly, realizes maximum discharge standard by high explosive force, high heat load.The working environment of piston assembly is quite harsh, high pressure, at a high speed, high temperature, high Frequency.Large commercial internal-combustion engine reaches 16-21Mpa; Linear speed per second reaches 8-16m/s; Mean temperature 300 DEG C, reach 1000 DEG C instantaneously; Because of compression blast, carrying power-converting, makes piston assembly bear periodic mechanical stress and heat load changes.

Described harsh working environment, particularly important to the sufficient lubrication of piston assembly, cooling, directly affect the performance and reliability of internal-combustion engine.Piston is mainly aluminum alloy manufacture, and when reaching 300 DEG C, mechanical strength can sharply decline 50%.

In prior art, cooling, lube pistons assembly, by water circulation, can take away partial heat indirectly; Also directly can cool, lubricate, establish oil cooling passage to cool by splashing lubrication oil and piston.But piston crown, particularly cylindrical are along week, it is maximum heating load friction area, in roundtrips, particularly compression is with under outburst stroke operating mode, does not reach sufficient lubrication, cooling, piston and casing wall is caused to form semi-dry friction, increase surface friction drag, also because not reaching sufficient lubrication, cooling, casing wall reserves larger gap, cause the dead band of burning, blowdown increases.Be explained with instantiation below:

Example YC-6K series commercial diesel, the coupling gap of piston assembly is as follows: piston crown top land (firepower bank) and casing wall gap reach 2.20mm, and the second ring bank and casing wall gap are 0.60mm, and skirt section and casing wall gap reach 0.015mm.Its piston crown top land have 12mm high × gap of 2.20mm, this gap can cause reducing fire, forms burning dead band; Second ring bank 13mm is high × gap of 0.60mm, and alter under causing inflammable gas, destroy lubricant film, during descent of piston, machine oil is altered, cause consumption of lubricating oil to increase.The average first ring of piston ring end gap clearance reaches 0.50mm, and second ring reaches 0.90mm, and the 3rd road ring reaches 0.375mm, and the leakage of inflammable gas is caused in this reserved larger gap, affects combustion efficiency.

Model utility content

The purpose of this utility model is to provide a kind of internal combustion engine structure, abundant to make piston assembly lubricate with cooling, reduces fit up gap, the sealing of enhanced burning room, improving combustion efficiency simultaneously.

For reaching above-mentioned purpose, solution of the present utility model is:

A kind of internal combustion engine structure, comprise piston, piston is made up of head and skirt section; At least arrange two oil grooves at piston crown, these two oil grooves mate formation two oil depot with piston ring and cylinder sleeve, and under working state, lubricant oil is mutual circulation between two oil depots.

Further, form top land, the second ring bank and the 3rd ring bank at piston crown, top land arranges first ring, second ring is set on the bank at the second ring, the 3rd road ring is set on the bank at the 3rd ring; Along arranging the first oil groove under the second ring bank, and the second oil groove is set in the middle part of the 3rd ring bank.

Further, the described first oil groove degree of depth is 1.50-3.77mm, is highly 1.50-3.50 mm.

Further, described first oil groove is set to L-type, and is arranged on the second ring second ring on the bank and mates and form U-shaped oil depot.

Further, the described second oil groove degree of depth is 2.50-4.50mm, is highly 1.00-2.50 mm.

Further, described second oil groove is set to single dike rectangle, and upper edge is set to sealing lip, and lower edge is set to lower seal lip.

Further, upper sealing lip and casing wall gap are 0.25-0.70mm, and height is 1.2 – 2.2mm.Lower seal lip and casing wall gap are 0.80-1.60mm, and height is 1.0 – 2.5mm.

Further, top land and casing wall gap are 0.60 – 1.2mm; Second ring bank and casing wall gap are 0.20 – 0.55mm.

Further, piston skirt and casing wall gap are 0.05 – 0.10mm.

Further, the end-gaps of first ring is 0.17mm-0.33mm; The end-gaps of second ring is 0.37mm-0.53mm; The end-gaps of the 3rd road ring is 0.12mm-0.28mm.

Further, the 3rd ring bank underlying piston arranges annular oil trap.

Further, piston skirt profile is set to C type.

After adopting such scheme, the utility model at least arranges two oil grooves at piston crown, these two oil grooves are interconnected, along with the upper and lower stroke of piston, described two oil grooves play limit work, limit oil storage, cloth oil, circulating lubricating oil effect, thus reach lubrication and cooling fully, make piston crown cool fully, reduce the reduction of piston machine intensity.

Meanwhile, described two oil grooves arrange structure, and the end-gaps of piston ring first ring, second ring and the 3rd road ring is reduced, and the cylinder prepareding gap of piston synchronously reduces, make combustion chamber sealing better effects if, improving combustion efficiency, thus internal-combustion engine overall efficiency is promoted.

Accompanying drawing explanation

Fig. 1 is side view of the present utility model (broken section);

Figure 1A is the partial enlarged drawing of Fig. 1;

Fig. 2 is that the utility model piston coordinates schematic diagram with cylinder sleeve;

Fig. 3 is that the utility model piston skirt profile coordinates schematic diagram with casing wall.

Label declaration

Piston 1 head 11

Top land 111 second ring bank 112

3rd ring bank 113 skirt section 12

Upper skirt 121 skirt end 122

First oil groove 13 second oil groove 14

Upper sealing lip 141 lower seal lip 142

Annular oil trap 15 first ring 21

Second ring 22 the 3rd road ring 23

Casing wall 3.

Embodiment

Below in conjunction with drawings and the specific embodiments, the utility model is described in detail.

Consult shown in Fig. 1 to Fig. 3, a kind of internal combustion engine structure that the utility model discloses, comprise piston 1, piston 1 is made up of head 11 and skirt section 12; At least arrange two oil grooves at piston 1 head 11, these two oil grooves mate formation two oil depot with piston ring and cylinder sleeve, and under working state, lubricant oil is mutual circulation between two oil depots.

As shown in Figures 1 and 2, form top land 111, second ring bank 112 and the 3rd ring bank 113 at piston 1 head 11, as shown in Figure 2, on top land, 111 arrange first ring 21, second ring bank 112 arranges second ring 22, the 3rd ring bank 113 arranges the 3rd road ring 23; First oil groove 13 is set on the second ring bank 112 times edges, and the second oil groove 14 is set in the middle part of the 3rd ring bank 113.

Described first oil groove 13 degree of depth is 1.50-3.77mm, is highly 1.50-3.50 mm.Described first oil groove 13 is set to L-type, mates and forms U-shaped oil depot, as shown in Figure 2 with the second ring 22 be arranged on the second ring bank 112.

First oil groove 13 and second ring 22 together form the U-shaped oil depot of oil storage function, along with piston 1 reciprocating stroke, play cloth oil and the effect of circulating lubricating oil, so lubricate fully, cooling piston top land 111, second ring bank 112 and piston ring first ring 21, second ring 22.

Described second oil groove 14 degree of depth is 2.50-4.50mm, is highly 1.00-2.50 mm.Described second oil groove 14 is set to single dike rectangle, and make frizing, cloth oil effect better, upper edge is set to sealing lip 141, and lower edge is set to lower seal lip 142.Upper sealing lip 141 is 0.25-0.70mm with casing wall 3 gap, and height is 1.2 – 2.2mm, and the lubricant oil of the second oil groove 14 in right amount, is evenly risen in the first oil groove 13, plays lubrication, cooling piston 1 head 2 and piston ring.Lower seal lip 142 and casing wall 3 gap are 0.80-1.60mm, and height is 1.0 – 2.5mm, and when making piston 1 descending, lubricant oil fully can be stored in the second oil groove 14.Piston 1 like this plays oil storage, cloth oil, circulation, the effectively rubbing surface of lubrication, cooling piston ring and whole piston 1 head 11 and casing wall 3 in strokes different up and down.

Top land 11 a and casing wall 3 gap are 0.60 – 1.2mm; Second ring bank 112 is 0.20 – 0.55mm with casing wall 3 gap.Piston 1 skirt section 12 and casing wall 3 gap are 0.05 – 0.10mm.

The end-gaps of first ring 21 is 0.17mm-0.33mm; The end-gaps of second ring 22 is 0.37mm-0.53mm; The end-gaps of the 3rd road ring 23 is 0.12mm-0.28mm.

3rd road ring 23 underlying piston 1 arranges annular oil trap 15, and annular oil trap 15 pushes lubricant oil to piston 1 head 11 in conjunction with casing wall 3 and skirt section 12 when up stroke.

As shown in Figure 3, piston 1 skirt section 12 profile is set to C type, be made up of upper skirt 121 and skirt end 122, along with the to-and-fro motion of piston 1, change working, crank rotate, the lubricant oil that comes up of splashing is pushed to annular oil trap 15 by piston 1 skirt section 12, to supply the first oil groove 13 and the second oil groove 14 above, lubricates skirt section 12 itself simultaneously, thus make the entirety of piston assembly, obtain sufficient lubrication, cooling from top to down.

In the present embodiment, the second upper and lower edge of oil groove 14 sets up sealing lip 141 and lower seal lip 142 respectively, plays oil storage, cloth oil, circulatory function together with casing wall 3.Specific in the present embodiment, on the second oil groove 14, sealing lip 141 height is 1.6mm, is 0.65mm with the gap of casing wall 3, and the lubricant oil of the second oil groove 14 in right amount, is evenly risen in the first oil groove 13, plays lubrication, cooling piston 1 head 2 and piston ring.Lower seal lip 142 height is 1.5mm, is 1.2mm with the gap of casing wall 3, and when making piston 1 descending, lubricant oil fully can be stored in the second oil groove 14.Piston 1 like this plays oil storage, cloth oil, circulation, the effectively rubbing surface of lubrication, cooling piston ring and whole piston 1 head 11 and casing wall 3 in strokes different up and down.

After the sufficient lubrication of piston assembly and cooling, further the cylinder prepareding gap of piston 1 is reduced, be specially, piston 1 top land 111 and casing wall 3 gap are 1.2mm; Piston 1 second ring bank 112 and casing wall 3 gap are 0.30mm; And skirt section 12 and casing wall 3 gap shrinks are to 0.07-0.09mm.

, the end-gaps of piston ring is synchronously reduced, be below the mean of ring end-gaps: first ring 21 reduces 0.25mm, and second ring 22 reduces 0.45mm, and the 3rd road ring 23 reduces 0.20mm meanwhile.The seal-moving part that the above piston 1, piston ring are main and casing wall 3 gap and conventional criteria reduce 30-60%, impel the pull of vacuum of firing chamber to increase, and namely compression pressure improves, and combustion efficiency promotes.Because of small―gap suture, machine oil is altered probability and greatly decline, reciprocal, the side pressure that causes of commutating and the vibration of piston assembly reduce.

Meanwhile, setting up of the first oil groove 13 and the second oil groove 14, between the components effectively, assured uniform establish oil film, decrease the frictional loss of part, reliability obtains and effectively promotes.Be below laboratory data of the present utility model and Contrast on effect:

YC 6G 7.8 riseinternal-combustion engine, type: YC-6G-240-30, internal-combustion engine are numbered: G60QA600388

SGS machine oil is rotten to be analyzed

Note: machine oil is comparatively tied, namely goes bad, and promotes 92.34%, proves that specific oil consumption can significantly reduce.

Exhaust smoke testing result

Note: exhaust emissions reduces by 92.5%

Claims

1. an internal combustion engine structure, is characterized in that: comprise piston, piston is made up of head and skirt section; At least arrange two oil grooves at piston crown, these two oil grooves mate formation two oil depot with piston ring and cylinder sleeve, and under working state, lubricant oil is mutual circulation between two oil depots.

2. a kind of internal combustion engine structure as claimed in claim 1, it is characterized in that: form top land, the second ring bank and the 3rd ring bank at piston crown, top land arranges first ring, second ring is set on the bank at the second ring, the 3rd road ring is set on the bank at the 3rd ring; Along arranging the first oil groove under the second ring bank, and the second oil groove is set in the middle part of the 3rd ring bank.

3. a kind of internal combustion engine structure as claimed in claim 1, is characterized in that: piston skirt profile is set to C type.

4. a kind of internal combustion engine structure as claimed in claim 2, is characterized in that: the described first oil groove degree of depth is 1.50-3.77mm, is highly 1.50-3.50 mm.

5. a kind of internal combustion engine structure as described in claim 2 or 4, is characterized in that: described first oil groove is set to L-type, and is arranged on the second ring second ring on the bank and mates and form U-shaped oil depot.

6. a kind of internal combustion engine structure as claimed in claim 2, is characterized in that: the described second oil groove degree of depth is 2.50-4.50mm, is highly 1.00-2.50 mm; Described second oil groove is set to single dike rectangle, and upper edge is set to sealing lip, and lower edge is set to lower seal lip.

7. a kind of internal combustion engine structure as claimed in claim 6, is characterized in that: upper sealing lip and casing wall gap are 0.25-0.70mm, and height is 1.2 – 2.2mm; Lower seal lip and casing wall gap are 0.80-1.60mm, and height is 1.0 – 2.5mm.

8. a kind of internal combustion engine structure as claimed in claim 2, is characterized in that: top land and casing wall gap are 0.60 – 1.2mm; Second ring bank and casing wall gap are 0.20 – 0.55mm; Piston skirt and casing wall gap are 0.05 – 0.10mm.

9. a kind of internal combustion engine structure as claimed in claim 2, is characterized in that: the end-gaps of first ring is 0.17mm-0.33mm; The end-gaps of second ring is 0.37mm-0.53mm; The end-gaps of the 3rd road ring is 0.12mm-0.28mm.

10. a kind of internal combustion engine structure as claimed in claim 2, is characterized in that: on the 3rd ring bank underlying piston, arrange annular oil trap.