CN201255027Y - Oil-gas separation device for gasoline engine - Google Patents

Abstract

The utility model provides a universal oil-gas separation device of a small gasoline engine, and belongs to the technical field of the machinery. The oil-gas separation device solves the problems of poor oil-gas separation effect and complex structure in the existing oil-gas separation device. The oil-gas separation device is arranged between a combustion chamber and an air filter, and comprises a crankcase and a cylinder head cover which is arranged at the top of the crankcase; wherein, the crankcase is communicated with the cylinder head cover; the crankcase and the cylinder head cover are respectively connected with the combustion chamber and the air filter; a crankshaft, a crank and a piston are arranged in the crankcase; the crankshaft is connected with the crankcase in a rotating way; the crank is arranged between the crankshaft and the piston; the two ends of the crank are hinged with the crankshaft and the piston; an oil mist generating mechanism is arranged between the crankshaft and the crankcase; and a circuitous channel which communicates the air filter and the crankcase is arranged in the cylinder head cover. The utility model has a compact and reliable structure; the circuitous channel in the cylinder head cover effectively realizes the oil-gas separation; and under the condition of low speed and large load, the utility model can also prevent the oil spray.

Description

The oily steum separating device of petrol engine

Technical field

The utility model belongs to field of mechanical technique, relates to a kind of oily steum separating device of general small gasoline engine.

Background technique

The more common oily steum separating device structure of general small-size petrol engine is that sheet metal of welding forms die cavity in the cylinder head cover, in the sheet metal upper punch one aperture is arranged simultaneously, and leaf valve is assemblied in the aperture top; The other end has outlet on the cylinder head cover, leans on the fluctuating of the shape of sheet metal own to realize that oily vapour separates.Gas blowby in the crankcase participates in burning after connecting empty filter behind the cylinder head cover.Another kind of more common crankcase ventilation system is the side that outlet is placed on crankcase, at outlet port install spring plate valve.Come the pressurized crankcase side by independent installation end cap, simultaneously in the end cap upper shed, the gas blowby in the crankcase participates in burning after entering the sky filter by the side ventilation system.The deficiency of these crankcase ventilation modes is: (A) cylinder head cover uses the cavity structure size instability that the stamping part welding forms, and is yielding; (B) crankcase side structure mold complexity, processing difficulties; (C) motor is prone to fuel injection event and oily vapour separating effect is relatively poor when the low speed heavy load.

Summary of the invention

The purpose of this utility model is the existing the problems referred to above of oily steum separating device at existing petrol engine, and has proposed a kind of oily vapour good separating effect, and the oily steum separating device of the reliable petrol engine of compact structure.

The purpose of this utility model can realize by following technical proposal: a kind of oily steum separating device of petrol engine, be arranged between firing chamber and the empty filter, comprise crankcase and the cylinder head cover of being located at the crankcase top, crankcase is connected with cylinder head cover and both link to each other with empty filter with the firing chamber respectively, in crankcase, be provided with bent axle, crank and piston, bent axle and crankcase are rotationally connected, crank is arranged between the crankshaft and piston and the two ends of crank are hinged with crankshaft and piston respectively, it is characterized in that, be provided with mist of oil between described bent axle and the crankcase and produce mechanism, in cylinder head cover, be provided with the circuitous channel that is communicated with empty filter and crankcase.

Firing chamber, crankcase, cylinder head cover and empty filter are connected together successively, when bent axle rotates, drive crank and piston and move downward, crankcase pressure is increased, gas blowby produces mist of oil, and the mist of oil between bent axle and the crankcase produces mechanism and produces lubricant mist simultaneously.Enter into the sky filter after the separation of these mist of oils through the circuitous channel in the cylinder head cover, participate in burning with fresh air.

In the oily steum separating device of above-mentioned petrol engine, described mist of oil produces mechanism and comprises the timing gear that are fixed on the bent axle and be rotatably connected on the interior oilgear of crankcase, described oilgear is umbrella gear and is meshed with timing gear that this oilgear is obliquely installed the bottom at crankcase.Bent axle can drive timing gear when rotating and together rotate, and the bottom of oilgear is immersed in the machine oil, and is meshed with timing gear, stirs machine oil by the driving of timing gear and forms lubricant mist.Oilgear is obliquely installed, and the lubricant mist of being convenient to form enters into above-mentioned circuitous channel.

In the oily steum separating device of above-mentioned petrol engine, described crankcase is fastened by casing and side cover to be formed, an end of bent axle and casing is rotationally connected and be provided with bearing between the two, and the other end of bent axle and side cover are rotationally connected and are provided with bearing between the two.The two ends of bent axle are equipped with bearing, can realize being rotationally connected of bent axle and crankcase.

In the oily steum separating device of above-mentioned petrol engine, be distributed with some oil return apertures that are connected with crankcase on the described circuitous channel.Isolated oil droplet can be got back in the crankcase by the oil return aperture that distributes on the circuitous channel during lubricant mist process circuitous channel, gas blowby finally arrives in the empty filter, after fresh air mixes, participate in burning, after having avoided directly entering air atmosphere is polluted.

In the oily steum separating device of above-mentioned petrol engine, the turning of described circuitous channel is provided with filter screen.Utilize filter screen to realize that oily vapour separates.

In the oily steum separating device of above-mentioned petrol engine, have the through hole that is connected with empty filter on the described cylinder head cover, leaf valve and filter screen two are housed in the through hole.Separate the remaining gas blowby in back through circuitous channel and enter into the sky filter, participate in burning with fresh air through through hole.

In the oily steum separating device of above-mentioned petrol engine, be fixed with a pivot in the described crankcase, above-mentioned oilgear is rotatably connected on the pivot.

In the oily steum separating device of above-mentioned petrol engine, described side cover is provided with stiffening rib.The mode that crankcase side covers by increasing stiffening rib is guaranteed bearings mounted local intensity.

Compared with prior art, the oily steum separating device mechanism of this petrol engine is compact reliable, and the circuitous channel on the cylinder head cover has realized that effectively oily vapour separates, under the situation of the big load of low speed, also can prevent the generation of fuel injection event, and isolated oil droplet can also be back in the crankcase recycling.Be provided with filter screen in the circuitous channel, oily vapour separating effect is better.

Description of drawings

Fig. 1 is the overall structure schematic representation of the motor of general gasoline engines.

Fig. 2 is the whole sectional structure schematic representation of the motor of general gasoline engines.

Fig. 3 is the schematic top plan view of the circuitous channel in the cylinder head cover.

Fig. 4 is the sectional view of Fig. 3 along the A-A direction.

Among the figure, 1, crankcase; 1a, casing; 1b, side cover; 2, cylinder head cover; 3, bent axle; 4, crank; 5, piston; 6, circuitous channel; 61, filter screen; 7, timing gear; 8, oilgear; 9, bearing; 10, through hole; 10a, leaf valve; 11, pivot.

Embodiment

Below be specific embodiment of the utility model and in conjunction with the accompanying drawings, the technical solution of the utility model is further described, but the utility model be not limited to these embodiments.

The oily steum separating device of this petrol engine is applicable in the general small gasoline engine, is arranged between firing chamber and the empty filter, is used for the oily vapour that working procedure produces is separated.

As depicted in figs. 1 and 2, the oily steum separating device of this petrol engine comprises crankcase 1 and is located at the cylinder head cover 2 at crankcase 1 top, crankcase 1 is fastened by casing 1a and side cover 1b to be formed, be provided with bent axle 3, crank 4 and piston 5 in the casing 1a of crankcase 1, bent axle 3 is rotationally connected with crankcase 1, crank 4 is arranged between bent axle 3 and the piston 5 and the two ends of crank 4 are hinged with bent axle 3 and piston 5 respectively, one end of bent axle 3 and casing 1a are rotationally connected and are provided with bearing 9 between the two, and the other end of bent axle 3 and side cover 1b are rotationally connected and are provided with bearing 9 between the two.

The casing 1a of crankcase 1 is communicated with the firing chamber, and cylinder head cover 2 is communicated with empty filter, also is communicated with between casing 1a and the cylinder head cover 2.Be fixed with timing gear 7 on the bent axle 3, also be rotatably connected to the oilgear 8 that meshes with timing gear 7 in the casing 1a of crankcase 1, oilgear 8 is obliquely installed in the bottom of casing 1a and is connected on the pivot 11.

As shown in Figure 3, be provided with the circuitous channel 6 that is communicated with empty filter and crankcase 1 casing 1a in the cylinder head cover 2, be distributed with some oil return apertures that are connected with crankcase 1 casing 1a on the circuitous channel 6.And being provided with filter screen 61 at the turning of circuitous channel 6, in the present embodiment, the quantity of filter screen 61 is two, lays respectively at shown position.

As shown in Figure 4, have the through hole 10 that is connected with empty filter on the cylinder head cover 2, leaf valve 10a and filter screen two are housed at through hole 10 places.

Firing chamber, crankcase 1, cylinder head cover 2 and empty filter are connected together successively, when bent axle 3 rotates, drive crank 4 and piston 5 and move downward, and crankcase 1 internal pressure is increased, and gas blowby produces mist of oil.Bent axle 3 drive timing gear 7 together rotate simultaneously, and utilize the rotation of the meshing relation driving oilgear 8 of timing gear 7 and oilgear 8.Wherein the bottom of oilgear 8 is immersed in the machine oil, and oilgear 8 stirs machine oil and forms lubricant mist when pivot 11 rotates.

When engine operation, the High Temperature High Pressure waste gas in the firing chamber by piston ring opened gap or experience wear after become big cylinder prepareding gap and enter in the casing 1a, if the stuffy quality that can influence machine oil.When pressure reaches 1.5MPa, can back down the leaf valve 10a that is assemblied on the cylinder head cover 2 and enter circuitous channel 6, and circuitous channel 6 there are twice to turn through 180 degree, filter screen 61 is installed at the turning.These above-mentioned gas blowbies and lubricant mist enter in the circuitous channel 6 of cylinder head cover 2 and separate, isolated oil droplet can be back in the casing 1a by the oil return aperture that distributes on the circuitous channel 6, remaining gas blowby enters into the sky filter by through hole 10, participate in burning with fresh air, after having avoided directly entering air atmosphere is polluted.

In the oily steum separating device of above-mentioned petrol engine, described side cover 1b is provided with stiffening rib.Crankcase 1 side cover 1b goes up by the mode that increases stiffening rib the local intensity that bearing 9 is installed is guaranteed.

Specific embodiment described herein only is that the utility model spirit is illustrated.The utility model person of ordinary skill in the field can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present utility model or surmount the defined scope of appended claims.

Claims (8)

1. the oily steum separating device of a petrol engine, be arranged between firing chamber and the empty filter, comprise crankcase (1) and be located at the cylinder head cover (2) at crankcase (1) top, crankcase (1) is connected with cylinder head cover (2) and both link to each other with empty filter with the firing chamber respectively, in crankcase (1), be provided with bent axle (3), crank (4) and piston (5), bent axle (3) is rotationally connected with crankcase (1), crank (4) is arranged between bent axle (3) and the piston (5) and the two ends of crank (4) are hinged with bent axle (3) and piston (5) respectively, it is characterized in that, be provided with mist of oil between described bent axle (3) and the crankcase (1) and produce mechanism, in cylinder head cover (2), be provided with the circuitous channel (6) that is communicated with empty filter and crankcase (1).

2. the oily steum separating device of petrol engine according to claim 1, it is characterized in that, described mist of oil produces mechanism and comprises the timing gear (7) that are fixed on the bent axle (3) and be rotatably connected on the interior oilgear (8) of crankcase (1), described oilgear (8) is meshed for umbrella gear and with timing gear (7), and this oilgear (8) is obliquely installed the bottom in crankcase (1).

3. the oily steum separating device of petrol engine according to claim 1, it is characterized in that, described crankcase (1) is fastened by casing (1a) and side cover (1b) to be formed, one end of bent axle (3) and casing (1a) are rotationally connected and are provided with bearing (9) between the two, and the other end of bent axle (3) and side cover (1b) are rotationally connected and are provided with bearing (9) between the two.

4. according to the oily steum separating device of claim 1 or 2 or 3 described petrol engine, it is characterized in that, be distributed with some oil return apertures that are connected with crankcase (1) on the described circuitous channel (6).

5. the oily steum separating device of petrol engine according to claim 4 is characterized in that, the turning of described circuitous channel (6) is provided with filter screen (61).

6. the oily steum separating device of petrol engine according to claim 4 is characterized in that, has the through hole (10) that is connected with the firing chamber on the described cylinder head cover (2), locates to be equipped with leaf valve (10a) and filter screen two at through hole (10).

7. the oily steum separating device of petrol engine according to claim 2 is characterized in that, is fixed with a pivot (11) in the described crankcase (1), and above-mentioned oilgear (8) is rotatably connected on the pivot (11).

8. the oily steum separating device of petrol engine according to claim 3 is characterized in that, described side cover (1b) is provided with stiffening rib.

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