CN209586464U - A kind of natural gas engine with filter net type ventilating system - Google Patents

Abstract

The utility model provides a kind of natural gas engine with filter net type ventilating system.The natural gas engine with filter net type ventilating system includes engine body and the ventilating system that is arranged on engine body, the ventilating system includes the pre-separate device being arranged in engine body upper cylinder housing, and the gas drive formula gs-oil separator being fixed on engine body；The passive type that the natural gas engine with filter net type ventilating system can be realized gas mixture is separated with active, forms breathing of engine closed cycle without external ancillary equipment, separative efficiency is high.

Description

A kind of natural gas engine with filter net type ventilating system

Technical field

The utility model belongs to breathing of engine apparatus field, and in particular to a kind of with the natural of filter net type ventilating system Gas engine.

Background technique

The high-temperature fuel gas that engine generates at work can be scurried into crankcase by the gap between piston group and cylinder, Cause gas blowby.The ingredient of gas blowby is unburned fuel vapor, vapor and exhaust gas etc..Water vapor condensation dilutes machine in machine oil Oil reduces the service performance of machine oil；Sulfur dioxide in exhaust gas encounters air oxidation and generates sulfuric acid, and the oxidation of machine oil is accelerated to become Matter will lead to the corrosion and accelerated wear test of engine part；Gas blowby can also make the hypertonia of crankcase and destroy crankcase Sealing, is lost engine oil leakage；Accelerate the aging of machine oil, reduces reliability.Therefore, it is necessary to using crankcase ventilation system to altering Gas is controlled.Gas blowby can carry a large amount of oil gas, machine oil is caused to be lost, deteriorate simultaneously when flowing through crankcase ventilation system Discharge, it is therefore necessary to oil gas be separated, machine oil loss is reduced.By gs-oil separator being integrated in valve mechanism cover come to hair The oil gas that motivation excludes is separated, and traditional valve mechanism cover can only carry out single separation, and effect can not reach expected, and Passive type separation is relied solely on to be difficult to meet the requirement of six engine emission standard of state.

Such as a kind of Chinese utility model patent " valve mechanism cover " of Publication No. CN205559013U, including valve mechanism cover Ontology is formed with oil gas pre-separation chamber on the inside of cylinder head cover body, the oil gas pre-separation chamber be equipped with pre-separation air inlet and Pre-separation gas outlet is successively arranged from the pre-separation air inlet to the pre-separation gas outlet along vertical in oil gas pre-separation room Histogram is laterally filtered to spaced multiple lateral strainers and in the horizontal direction in the spaced multiple longitudinal strainers of labyrinth type The mazy gas channel for being connected to pre-separation air inlet and pre-separation gas outlet is formed between net and longitudinal strainer, and in cylinder Housing lateral wall is integrated with gs-oil separator.By the above content it can be found that valve mechanism cover Oil-gas Separation in the prior art Core is the mazy gas channel formed between lateral strainer and longitudinal strainer, but its single layer structure Oil-gas Separation ability Difference, can not separate fine oil droplets, also cannot achieve passive type separation and active isolated combination, be unable to satisfy engine state six The requirement of discharge.

Such as the Chinese invention patent " independent external hanging type multistage gs-oil separator assembly " of Publication No. CN102705040B, it is A kind of gas drive formula active separator can carry out active separation to the gas mixture in crankcase, but only with active point Six discharge standard of state is unable to satisfy from device.

Such as the Chinese invention patent application " oil and gas separating system built in valve mechanism cover " of Publication No. CN108049937A, Built-in gs-oil separator, comprising: housing ontology and the labyrinth cavity and bottom cover that the housing ontology side is set, the labyrinth One end of cavity is provided with the outgoing gas connection tube extended to outside housing, and top offers respirator socket；It is set in the labyrinth chamber body There are coarse filtration orifice plate, winding type rectifier structure, refined filtration orifice plate and every position plate.By the above content it can be found that the prior art can not It realizes passive type separation and active isolated combination, is unable to satisfy the requirement of the discharge of engine state six.

Utility model content

The purpose of the utility model is to overcome the defects of the above-mentioned prior art, provide a kind of with filter net type ventilating system Natural gas engine, can be achieved at the same time passive type and separated with active, be able to satisfy six engine calls of state.

The purpose of this utility model is achieved through the following technical solutions:

The utility model provide a kind of natural gas engine with filter net type ventilating system, including engine body with And the ventilating system on engine body is set, the ventilating system includes being arranged in engine body upper cylinder housing Pre-separate device, and the gas drive formula gs-oil separator being fixed on engine body；

The pre-separate device is offered for receiving the air inlet of gas mixture in crankcase and being equipped with for inciting somebody to action The gas vent of exhaust gas discharge after separation, the gas vent are equipped with the outlet of connection gas drive formula gs-oil separator exhaust gas entrance Pipe；

The pre-separate device includes:

Bottom plate and the sieve plate being arranged on bottom plate, the air inlet are arranged in sieve plate；Oil gas in crankcase Mixture is flowed into from the air inlet in sieve plate, and due to the effect of sieve plate, when gas mixture air inlet, part larger oil droplet can be touched It hits sieve plate and flows back；

The first filter opening plate being arranged in parallel on bottom plate and the first filter baffle, the first oil back chamber on bottom plate and the under it The crude separation device of one oil return pipe composition, the crude separation device is located at sieve plate rear, for adding to gas mixture Speed collision further separates larger oil droplet；It is arranged in parallel in the second filter opening plate on bottom plate, filter core and the second filter baffle, on bottom plate The thin separator of second oil back chamber and the second oil return pipe composition under it, after the thin separator is located at crude separation device Side further separates small oil droplet for again speed up colliding to gas mixture, and the gas vent setting is in subdivision from dress Exhaust gas after separation is delivered to gas drive formula gs-oil separator by escape pipe by the side of postponing, the gas vent;

The compressed gas entrance of the gas drive formula gs-oil separator is by taking the charge inter cooling on tracheae and engine body Pipeline is connected, and overcomes collision to separate to push jet pump to generate negative pressure for sucking the compressed gas after engine booster Required resistance；The mixed gas outlet of the gas drive formula gs-oil separator passes through snorkel and calming the anger on engine body The air inlet of machine is connected, to realize the closed cycle from air inlet to exhaust；The oil return opening of the gas drive formula gs-oil separator The oil sump of engine body is connected to by oil return general pipeline.

The coarse filtration hole for being accelerated to gas mixture is provided on the first filter opening plate in the crude separation device. In one embodiment, it is provided on the first filter baffle and filters rib for the one of water conservancy diversion oil droplet to the first oil back chamber；Again In one embodiment, the needle-shaped lug boss for increasing oil gas making contact area is provided on the first filter baffle, it is described Needle-shaped lug boss can effectively prevent oil droplet since high velocity impact causes second-time breakage, improve oil-gas separation efficiency.Described first The lower section of the first filter baffle is arranged in oil back chamber, and the first filter baffle is the hatch frame of non-close so as to gas mixture The bottom of the first oil back chamber is arranged in flowing, first oil return pipe.

In one embodiment, the second filter opening plate in the thin separator, filter core and the second filter baffle are snugly into each other Ground is arranged on bottom plate；The fine filtering hole for carrying out secondary acceleration to gas mixture, institute are provided on the second filter opening plate It states and is provided on the second filter baffle for colliding the small oil droplet of separation and the small oil droplet of water conservancy diversion to the two of the second oil back chamber filters ribs, it is described The setting of second oil back chamber filters baffle rear second, and the second filter baffle is the hatch frame of non-close, second oil return The bottom of the second oil back chamber is arranged in pipe.

Compared with the prior art, the advantages of the utility model are:

The natural gas engine with filter net type ventilating system can be realized the passive type of gas mixture with it is active Separation forms breathing of engine closed cycle without external ancillary equipment, and separative efficiency is high.

Detailed description of the invention

The embodiments of the present invention are described further referring to the drawings, in which:

Fig. 1 is the engine structure schematic diagram according to the utility model one embodiment；

Fig. 2 is the ventilation system setups schematic diagram according to the utility model one embodiment；

Fig. 3 is the three dimensional structure diagram according to the gas drive formula gs-oil separator of the utility model one embodiment；

Fig. 4 is the valve mechanism cover schematic diagram of internal structure according to one embodiment of the invention；

Fig. 5 is the three dimensional structure diagram according to the pre-separate device of one embodiment of the invention；

Fig. 6 is the planar structure schematic diagram according to the pre-separate device of one embodiment of the invention；

Fig. 7 is the structural schematic diagram according to the sieve plate of one embodiment of the invention；

Fig. 8 is the three dimensional structure diagram according to the first filter opening plate of one embodiment of the invention and the first filter baffle；

Fig. 9 is the three dimensional structure diagram that needle-shaped lug boss is equipped with according to the first of one embodiment of the invention the filter baffle；

Figure 10 is to be illustrated according to the three-dimensional structure of the second filter opening plate of one embodiment of the invention, filter core and the second filter baffle Figure.

In figure, 100 be engine body, and 101 be fixed frame, and 200 be valve mechanism cover, and 204 be escape pipe, and 205 be to take gas Pipe, 206 be oil return general pipeline, and 207 be snorkel, and 300 be gas drive formula gs-oil separator, and 301 be exhaust gas entrance, and 302 be compressed gas Body entrance, 303 be mixed gas outlet, and 304 be oil return opening, and 500 be pre-separate device, and 501 be bottom plate, and 502 be sieve plate, 503 be the first filter opening plate, and 504 be the first filter baffle, and 505 be the second filter opening plate, and 506 be filter core, and 507 be the second filter baffle, 508 For the first oil back chamber, 509 first oil return pipes, 510 be the second oil back chamber, and 511 be the second oil return pipe, and 512 be air inlet, and 513 are Gas vent, 515 be coarse filtration hole, and 516 be a filter rib, and 517 be fine filtering hole, and 518 be two filter ribs.

Specific embodiment

In order to make the purpose of this utility model, technical solution and advantage are more clearly understood, and pass through tool below in conjunction with attached drawing The utility model is further described in body embodiment.It should be appreciated that specific embodiment described herein is only to explain The utility model is not used to limit the utility model.

A kind of natural gas engine with filter net type ventilating system in an embodiment of the present invention, there is provided is such as schemed 1, shown in Fig. 2, including engine body 100 and the ventilating system being arranged on engine body 100, the ventilating system packet It is as shown in Figure 4 to include the pre-separate device 500(being arranged in 100 upper cylinder housing 200 of engine body), and pass through fixed frame 101 are fixed on the gas drive formula gs-oil separator 300 on engine body 100；As shown in Figure 5, Figure 6, the pre-separate device 500 Equipped with the air inlet 512 for receiving gas mixture in crankcase and for the gas vent of the exhaust gas discharge after separating 513；The pre-separate device 500 includes: bottom plate 501 and the sieve plate being arranged on bottom plate 501 502, the air inlet 512 Setting is (as shown in Figure 6, Figure 7) for sucking gas mixture in engine crankcase in sieve plate 502, and gas mixture exists When into pre-separate device 500, due to the effect of sieve plate 502, part larger oil droplet (oil droplet that diameter is greater than 10um) can be collided Sieve plate 502 and flow back, remaining gas mixture can pass through air inlet 512 enter pre-separate device 500；

Please continue to refer to Fig. 5 and Fig. 6, the first filter opening plate 503 and the first filter baffle 504 that are arranged in parallel on bottom plate 501, The crude separation device of the first oil back chamber 508 on bottom plate 501 and the first oil return pipe 509 composition under it, the crude separation device Positioned at 502 rear of sieve plate, for handling the larger oil droplet in gas mixture (referring to that droplet diameter is 2~10um)；Parallel arrangement 510 and of the second oil back chamber on the second filter opening plate 505, filter core 506 and the second filter baffle 507, bottom plate 501 on bottom plate 501 The thin separator of the second oil return pipe 511 composition under it, the thin separator is located at crude separation device rear, for handling Small oil droplet (referring to that droplet diameter is 0.1~2um) in gas mixture；The gas vent 513 is arranged at thin separator rear For the exhaust gas after separating oil droplet to be discharged, the air inlet 512, thin separator, crude separation device and gas vent 513 constitute oil Gas channel；

The gas vent 513 is equipped with the escape pipe 204(of connection 300 exhaust gas entrance 301 of gas drive formula gs-oil separator as schemed Shown in 2)；The compressed gas entrance 302 of the gas drive formula gs-oil separator 300 is by taking on tracheae 205 and engine body 100 Charge inter cooling pipeline be connected (as shown in Figure 1), for sucking the compressed gas after engine booster to push jet pump to produce Raw negative pressure separates required resistance to overcome to collide；The mixed gas outlet 303 of the gas drive formula gs-oil separator 300 passes through Snorkel 207 is connected (not shown) with the air inlet of the compressor on engine body 100, to realize from air inlet to The closed cycle of exhaust；The oil return opening 304 of the gas drive formula gs-oil separator is connected to engine body by oil return general pipeline 206 100 oil sump is finally reached and the passive type of crankcase oils gas mixture is separated with active, realizes closed cycle, makes Separating effect reaches six engine emission standard of state.

Please continue to refer to Fig. 5 and Fig. 6, the first filter opening plate 503 in the crude separation device is parallel with the first filter baffle 504 It is arranged on bottom plate 501；The coarse filtration hole for once being accelerated to gas mixture is provided on the first filter opening plate 503 515(is as shown in Figure 8).In one embodiment, with continued reference to FIG. 8, being provided on the first filter baffle 504 for colliding Separation larger oil droplet (refer to droplet diameter as 2~10um) and water conservancy diversion larger oil droplet filters rib 516 to the one of the first oil back chamber 508, it is described First oil back chamber 508 be arranged in first filter baffle 504 lower section, it is described first filter baffle 504 be non-close hatch frame (just In formation gas channel), the bottom of the first oil back chamber 508 is arranged in first oil return pipe 509；Gas mixture flows through first It is hit after the acceleration of filter opening plate 503 with the first filter baffle 504, larger oil droplet will flow into the first oil return by a filter rib 516 Chamber 508, remaining gas mixture flow through opening portion (gas channel) outflow of the first filter baffle 504；In another implementation In example, as shown in figure 9, being provided with the needle-shaped lug boss for increasing oil gas making contact area on the first filter baffle 504 520, the needle-shaped lug boss 520 can effectively adsorb high velocity impact first and filter the larger oil droplet of baffle 504 and arrive oil droplet water conservancy diversion First oil back chamber 508 prevents larger oil droplet since high velocity impact causes second-time breakage (larger oil droplet collision is easy to produce splashing), improves Oil-gas separation efficiency, larger oil droplet flow into first oil back chamber 508 by needle-shaped lug boss 520, remaining gas mixture flows through Opening portion (gas channel) outflow of first filter baffle 504.

In one embodiment, as shown in fig. 6, the second filter opening plate 505, filter core 506 in the thin separator and Two filter baffles 507 are arranged in snugly into each otherly on bottom plate 501；As shown in Figure 10, it is provided with and is used on the second filter opening plate 505 The fine filtering hole 517 that secondary acceleration is carried out to gas mixture, when gas mixture flows through the second filter opening plate 505, in fine filtering hole 517 Under the action of gas mixture carried out secondary acceleration, gas mixture can carry out high speed impact, the filter to the filter core 506 506 lower part of core is hatch frame convenient for forming gas channel, and the filter core 506 is for after adsorbing the secondary acceleration of gas mixture Small oil droplet (referring to that droplet diameter is 0.1~2um), wherein the material of filter core 506 can be non-woven fabrics, felt, glass fibre or conjunction At fiber, filter core 506 is good using these materials absorption oil droplet effect, and filter core 506 is acted in the high speed impact of secondary acceleration Under, surface will not assemble residue, therefore can exempt periodic replacement maintenance and (directly adopt filter pulp in the prior art and carry out oil Gas separation, though efficiency is high, need to regularly replace maintenance filter pulp, maintenance cost is higher)；On the second filter baffle 507 It is provided with for colliding the small oil droplet of separation and two filter ribs 518 of the small oil droplet of water conservancy diversion to the second oil back chamber 512, the second filter gear The lower part of plate 507 is the hatch frame (forming gas channel) of non-close, convenient for the flowing of gas mixture, air-fuel mixture logistics After filter core 506 under the effect of impact of the second filter baffle 507, small oil droplet flows into the second oil back chamber by two filter ribs 518, Excess oil gas mixture enters next stage separator by the hatch frame (gas channel) of the second filter baffle 507.

Refer to the prior art for the other structures of the natural gas engine, and details are not described herein.

What the reference in this specification for " some embodiments ", " one embodiment " or " embodiment " etc. referred to is knot Special characteristic described in the embodiment, structure or property is closed to be included at least one embodiment.Therefore, phrase is " each In a embodiment ", " in some embodiments ", " in one embodiment " or " in embodiment " etc. throughout the specification The appearance of each place not necessarily refers to identical embodiment.In addition, special characteristic, structure or property can be at one or more It is combined in any way as suitable in a embodiment.Therefore, in conjunction with shown in one embodiment or description special characteristic, structure Or property wholly or partly can be combined unlimitedly with the feature of one or more other embodiments, structure or property, As long as the combination is not non-logicality or cannot work.In addition, each element in illustrations is just to illustrating It is bright, it is not necessarily drawn to scale.

It is thus described several aspects of at least one embodiment of the utility model, it will be understood that art technology Various changes, modification and improvement are easy to carry out for personnel.This changes, modifications and improvement are intended to the essence in the utility model In mind and range.

Claims (3)

1. a kind of natural gas engine with filter net type ventilating system, including engine body and setting are in engine body On ventilating system, the ventilating system includes the pre-separate device being arranged in engine body upper cylinder housing, Yi Jigu The gas drive formula gs-oil separator being scheduled on engine body, it is characterised in that:

Air inlet and gas vent are offered on the pre-separate device, the pre-separate device includes:

Bottom plate and the sieve plate being arranged on bottom plate, the air inlet are arranged in sieve plate；

The first filter opening plate being arranged in parallel on bottom plate and the first filter baffle, the first oil back chamber on bottom plate and first time under it The crude separation device of oil pipe composition, the crude separation device are located at sieve plate rear；

It is arranged in parallel in the second filter opening plate on bottom plate, under filter core and the second filter baffle, the second oil back chamber and its on bottom plate The thin separator of second oil return pipe composition, the thin separator are located at crude separation device rear, and the gas vent setting exists Thin separator rear；

The gas vent is equipped with the escape pipe of connection gas drive formula gs-oil separator exhaust gas entrance, the gas drive formula gs-oil separator Compressed gas entrance by taking tracheae to be connected with the charge inter cooling pipeline on engine body, the gas drive formula Oil-gas Separation The mixed gas outlet of device is connected by snorkel with the air inlet of the compressor on engine body, the gas drive formula oil gas The oil return opening of separator is connected to the oil sump of engine body by oil return general pipeline.

2. as described in claim 1 with the natural gas engine of filter net type ventilating system, it is characterised in that: the crude separation It is provided with coarse filtration hole on the first filter opening plate in device, is provided with a filter rib or needle-shaped lug boss on the first filter baffle, First oil back chamber is arranged in the lower section of the first filter baffle, and the first filter baffle is the hatch frame of non-close, and described the The bottom of the first oil back chamber is arranged in one oil return pipe.

3. as described in claim 1 with filter net type ventilating system natural gas engine, it is characterised in that: it is described segment from The second filter opening plate, filter core and the second filter baffle in device are arranged on bottom plate snugly into each otherly；It is set on the second filter opening plate It is equipped with fine filtering hole, two filter ribs are provided on the second filter baffle, the second oil back chamber setting filters baffle rear second, The second filter baffle is the hatch frame of non-close, and the bottom of the second oil back chamber is arranged in second oil return pipe.