CN2858963Y

CN2858963Y - Crankcase ventilation device

Info

Publication number: CN2858963Y
Application number: CN 200520098863
Authority: CN
Inventors: 郭智义
Original assignee: Dongfeng Motor Co Ltd
Current assignee: Dongfeng Trucks Co ltd
Priority date: 2005-11-16
Filing date: 2005-11-16
Publication date: 2007-01-17
Anticipated expiration: 2015-11-16

Abstract

The utility model discloses a crankcase ventilation device, which comprises a labyrinth communicated with an air inlet pipe and an air outlet pipe and an oil return groove communicated with the labyrinth; the labyrinth is positioned in the gear chamber of the engine and is composed of the inner wall of the gear chamber and reinforcing ribs. The labyrinth has at least two oil-gas separation areas, which are a wall collision area and an expansion area which are communicated; the wall hitting area is communicated with the air inlet pipe, and the expansion area is communicated with the air outlet pipe. The U-shaped oil return groove communicated with the labyrinth is positioned on the back of the inner wall of the gear chamber. The utility model discloses crankcase ventilation unit has saved the valuable whole car and has arranged the space, low cost, reliability height, effectual.

Description

Crankcase bleeder

Technical field

The utility model belongs to technical field of internal combustion engines, especially relates to a kind of built-in diesel engine crankcase ventilation plant.

Background technique

The diesel engine crankcase ventilation plant all is by independent crankcase ventilation assembly at present, is installed in external engine (on valve mechanism cover, gear chamber cover or the tappet chamber cover plate), utilizes the filtration of labyrinth and resuscitation apparatus filter core, reaches the effect of Oil-gas Separation.The crankcase ventilation of this mode needs an independent crankcase ventilation assembly, and the cost height takies the car load space, increase and arrange difficulty, and filter core is after work for a long time, and easily blockage phenomenon influences oil gas separation.

Summary of the invention

The utility model is saved the car load space in order to simplify part, reduces cost, provide a kind of with low cost, be easy to realize, safe and reliable built-in crankcase bleeder.

The utility model crankcase bleeder comprises labyrinth that communicates with suction tude, steam outlet pipe and the oil-return groove that communicates with the labyrinth; Described labyrinth is positioned at the engine gear chamber interior, constitutes the labyrinth wall by gear chamber inwall and stiffening rib.

There are at least two Oil-gas Separation districts in the labyrinth, is impingement zone and the breathing space that communicates; Impingement zone communicates with suction tude, and the breathing space communicates with steam outlet pipe.

Oil-return groove is positioned at the back of gear chamber inwall, is U-shaped, communicates with impingement zone by the wall return opening that hits that is positioned at the minimum position of impingement zone, communicates with the breathing space by the expansion return opening that is positioned at minimum position, breathing space.

On function, the utility model is described further below.

Constitute the labyrinth wall with engine gear chamber interior walls and stiffening rib, do not need special independent crankcase ventilation assembly to be set at external engine.

Oil gas enters impingement zone with certain speed by inlet hole, and oil gas hits on the wall of the labyrinth of impingement zone, on the labyrinth wall of machine oil attached to impingement zone, has played the Oil-gas Separation effect.

Oil gas through the impingement zone initial gross separation enters the breathing space, and oil gas further expands in the breathing space, and speed slows down, so that on the labyrinth wall of the machine oil that comprises in the oil gas attached to the breathing space, further realize Oil-gas Separation.

Oil-return groove is " U " shape structure, prevents from that oil gas in the oil-return groove from returning to scurry into the labyrinth.

Bump return opening and expansion return opening lay respectively at the minimum position of impingement zone and breathing space, and isolated machine oil all can flow into oil-return groove by return opening.

In sum, the beneficial effects of the utility model are as follows:

In the engine gear chamber interior crankcase bleeder is set, utilizes gear chamber inwall and stiffening rib to constitute the labyrinth wall, saved valuable car load arrangement space, and cost is low, the life-span height.

Adopt impingement zone and breathing space to carry out Oil-gas Separation, effective, the reliability height.

The oil-return groove of " U " shape structure prevents from that oil gas from returning to scurry into the labyrinth.

Bump return opening and expansion return opening lay respectively at the minimum position of impingement zone and breathing space, and the oil droplet that helps on the wall of labyrinth flows into oil-return groove by return opening.

Below by the drawings and the specific embodiments the utility model is described further.

Description of drawings

Fig. 1 is the crankcase bleeder structural representation;

Fig. 2 is a crankcase bleeder oil-return groove structural representation.

Embodiment

Referring to Fig. 1, Fig. 2, the present embodiment crankcase bleeder is positioned at engine gear case 6, comprises the labyrinth 1 that communicates with suction tude (not shown), steam outlet pipe 8, and the oil-return groove 5 that communicates with labyrinth 1; Described labyrinth 1 is positioned at engine gear case 6 inside, constitutes labyrinth 1 wall by gear chamber 6 inwalls 10 and stiffening rib 9a, 9b, 9c.

Referring to Fig. 1, labyrinth 1 is divided into impingement zone 1a and the breathing space 1b that communicates again, and wherein breathing space 1b is isolated into two-part by stiffening rib 9b.Impingement zone 1a communicates with the suction tude (not shown) by inlet hole 2, and the breathing space 1b that is positioned at impingement zone 1a top communicates with steam outlet pipe 8 by air outlet hole 3.

Referring to Fig. 2, hit wall return opening 4a at the minimum position of impingement zone 1a, at the minimum position of breathing space 1b expansion return opening 4b is arranged.Hitting wall return opening 4a and expansion return opening 4b communicates with the U-shaped oil-return groove 5 that is positioned at engine gear chamber interior walls 11 backs.

On function, the utility model is described further below.

Oil gas enters labyrinth 1 by inlet hole 2, and through bump, expansion, after the Oil-gas Separation, machine oil flows into oil-return groove 5 through hitting wall return opening 4a and expansion return opening 4b in labyrinth 1, and the gas of process Oil-gas Separation flows into outlet pipe 8, and enters atmosphere through outlet pipe 8.

Referring to Fig. 1, constitute labyrinth 1 with engine gear case 6 stiffening rib 9a, 9b, 9c and inwall 10, do not need special independent crankcase ventilation assembly to be set at external engine.

Also referring to Fig. 1, oil gas enters impingement zone 1a with certain speed by inlet hole 2, and oil gas clashes into and attached on the impingement zone 1a wall, played preliminary Oil-gas Separation effect.

Referring to Fig. 1, the oil gas of process impingement zone 1a enters breathing space 1b again, volumetric expansion, and speed slows down, and machine oil has carried out Oil-gas Separation again attached on the breathing space 1b wall.

Referring to Fig. 2, oil-return groove 5 is " U " shape structure, plays the oil gas that prevents in the oil-return groove 5 and returns the effect of scurrying into labyrinth 1.

Referring to Fig. 1, Fig. 2, bump return opening 4a and expansion return opening 4b lay respectively at the minimum position of impingement zone 1a and breathing space 1b, and isolated machine oil all can flow into oil-return groove 5 by return opening 4 in the labyrinth.

In sum, the beneficial effect of present embodiment is as follows:

In engine gear case 6 inside crankcase bleeder is set, utilizes gear chamber stiffening rib 9a, 9b, 9c and inwall 10 to constitute labyrinth 1 wall, saved valuable car load arrangement space, and cost is low, the life-span height.

Adopt impingement zone 1a and breathing space 1b to carry out Oil-gas Separation, effective, the reliability height.

The oil-return groove 5 of " U " shape structure has improved the effect of Oil-gas Separation.

Bump return opening 4a and expansion return opening 4b lay respectively at the minimum position of impingement zone 1a and breathing space 1b, help isolated machine oil and flow into oil-return groove 5 by return opening 4a, 4b.

Certainly, adopting plural breathing space also can reach the function and the effect of above-mentioned mode of execution, also is protection domain of the present utility model.

Claims

1, a kind of crankcase bleeder comprises labyrinth that communicates with suction tude, steam outlet pipe and the oil-return groove that communicates with the labyrinth, and it is characterized in that: described labyrinth is positioned at the engine gear chamber interior, constitutes the labyrinth wall by gear chamber inwall and stiffening rib.

2, according to the described crankcase bleeder of claim 1, it is characterized in that: described labyrinth comprises at least two Oil-gas Separation districts.

3, according to the described crankcase bleeder of claim 2, it is characterized in that: described labyrinth comprises impingement zone and the breathing space that communicates with described impingement zone; Described impingement zone links to each other with described suction tude, and described breathing space links to each other with described steam outlet pipe.

4, according to the described crankcase bleeder of claim 1, it is characterized in that: described oil-return groove is positioned at the back of gear chamber inwall.

5, according to the described crankcase bleeder of claim 4, it is characterized in that: described oil-return groove is a U-shaped, communicate with described impingement zone by the wall return opening that hits that is positioned at the minimum position of described impingement zone, communicate with described breathing space by the expansion return opening that is positioned at minimum position, described breathing space.