CN208950672U - A kind of adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system - Google Patents

Abstract

The utility model belongs to Diesel Engine Technique Field, a kind of open adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system.Disclosed one kind is adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system has the level-one gs-oil separator being arranged in cylinder head；Level-one gs-oil separator is connected to second level gs-oil separator by gas circuit；Second level gs-oil separator has the air inlet pipe being connected to booster；The front end of air inlet pipe is connected with booster, and rear end is provided with conical pipe；The outer tube of setting concentric with it is equipped on the outside of air inlet pipe, conical pipe；The front opening of outer tube is sealed by front baffle, and open rearward end is sealed by rear bulkhead；Middle partition is additionally provided between front baffle and rear bulkhead；It is welded on the crankcase breather connection front baffle on outer tube and the cavity between middle partition.The space of diesel engine arrangement is greatly saved in the utility model, overcomes, occupancy volume excessive disadvantage heavy using double separation oil and gas separators.

Description

A kind of adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system

Technical field

The utility model belongs to Diesel Engine Technique Field, and in particular to a kind of adjustable, two-stage Oil-gas Separation diesel engine Crankcase closed circulation system.

Background technique

Diesel engine at runtime, release amount of heat in gas in-cylinder combustion and lead to the components temperature such as piston by gas and fuel oil It increases, machine oil is when lubricating these high temperature components by thermal evaporation, while the high-temperature gas of combustion chamber is between piston and cylinder sleeve Gap scurry into crankcase, if crankcase oil gas exclude it is unsmooth, will lead to the raising of crankcase pressure；For crankshaft is effectively reduced Pressure in case prevents the excessively high influence diesel engine operation of crankcase pressure, high-temperature oil gas gaseous mixture in crankcase is avoided to be directly discharged into Environment is polluted in atmosphere, while reducing engine motor oil consumption rate, and diesel engine usually has a set of crankcase breather system；Common Crankcase breather system is open type, and the gas after separation is expelled in atmosphere, and machine oil remaining in this way can pollute atmosphere.

At present from published data, such as Authorization Notice No.: CN 107780993A " the crankcase respiratory system of engine System ", this patent is closed circulation system, and gas first passes through the cavity with partition and gas-oil separator core and rises in crankcase It is entered back into after to the effect of initial gross separation oil gas after gs-oil separator carries out secondary separation and participates in recycling again into booster；But The program does not consider once booster suction is excessive to may result in generation negative pressure in crankcase, to influence the fortune of machine Row.And the cavity and gs-oil separator of program initial gross separation are independently of each outside machine, the arrangement being unfavorable between diesel air.

Such as 105041426 A of CN " gaseous propellant engine crankcase enclosed gas venting system ", circulation is also to close in this patent The formula circulatory system, crankcase high-temperature gas mixture gas after gs-oil separator separates enter to booster and continue to participate in circulation, Machine oil is then back in oil sump；The program avoids gas backstreaming in the way of check valve and crankcase generates asking for negative pressure Topic；And booster is lubricated and is combined with the system, save the arrangement space of diesel engine；But the patent is also because using single The reason excessive and booster lubrication is integrated to valve, causes structure complex, and the probability that breaks down in actual use Increase, reduces the reliability of the system.In addition, the device only once separates crankcase oil gas, easily cause to separate endless Entirely, so that causing entry into gas in booster mixes machine oil, it is unfavorable for the long-time service of machine.

Such as 203499767 U of CN " medium-speed high-power diesel engine positive crankcase ventilation(PCV) ", which, which passes through, utilizes pressure High-temperature oil gas in crankcase is introduced to silencer secondary separation, gas after separation through gs-oil separator by the mode of contracting nozzle injection Atmosphere is discharged in body, and machine oil is back to oil sump and continues to participate in circulation.Gas does not continue to participate in circulation after separating in the patent, works as bavin When oil machine longtime running, its economy is influenced, while not separating complete machine oil to lead to environmental pollution.In addition the system It is only applicable to be mounted with the equipment of exhaust silencer, smaller scope of application；And above-mentioned three patent, crankcase ventilation cannot all be followed Loop system carries out effective pressure and adjusts control.

Utility model content

In order to solve the above technical problems, the purpose of this utility model is to propose a kind of adjustable, two-stage Oil-gas Separation bavin Oil machine crankcase closed circulation system.

The utility model is to complete above-mentioned purpose to adopt the following technical scheme that

A kind of adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system, the diesel engine crankcase Closed circulation system has the level-one gs-oil separator being arranged in cylinder head, and the level-one gs-oil separator is connected to crankshaft Case, to carry out level-one separation to the high-temperature oil gas for entering crankcase after it has been burned in the cylinder；The level-one gs-oil separator is logical Cylinder head connection oil sump is crossed, the machine oil separated through level-one gs-oil separator is sent into oil sump；The level-one gs-oil separator Second level gs-oil separator is connected to by gas circuit；And it is provided between second level gs-oil separator and the level-one gs-oil separator Adjustable throttle valve；The second level gs-oil separator is Multifunctional oil gas separating device;The multifunctional oil gas separator There is the air inlet pipe being connected to booster；Front end, that is, outlet end of the air inlet pipe is connected with the booster；The air inlet Rear end, that is, input end of pipe is provided with conical pipe；The conical pipe is by the structure of the input end flaring diameter backward of air inlet pipe； The outer tube of setting concentric with it is equipped on the outside of the air inlet pipe, conical pipe；The outer tube is opened for rear and front end The tubular structure of mouth；The front opening of the outer tube is sealed by the front baffle being nested on air inlet pipe, conical pipe；It is described The open rearward end of outer tube is sealed by the rear bulkhead being nested on conical pipe；The front baffle and the rear bulkhead it Between be additionally provided with the middle partition being nested on air inlet pipe, conical pipe；The middle partition is to have ring-type jaggy；Described is more Function gs-oil separator is additionally provided with the crankcase breather being welded on outer tube, before the crankcase breather connection every Cavity between plate and middle partition；Also there is notch on the side wall surface of the conical pipe, and notch described on middle partition with The notch is staggered on conical pipe, forms labyrinth type gas passage, makes to enter outer tube by crankcase breather Interior high-temperature oil gas labyrinth type in the cavity that front baffle, middle partition, rear bulkhead are formed, which moves ahead, carries out Oil-gas Separation, after separation Gas enters conical pipe, air inlet pipe by the venthole on conical pipe, participates in burning in entering booster, the machine oil after separation Oil return pipe by the way that gs-oil separator lower part is arranged in flows into oil sump;The Multifunctional oil gas separating device is also connected to useful To carry out cooling intercooler to air lift separated in Multifunctional oil gas separating device；The gas output end of the intercooler is connected to Cylinder.

The utility model proposes adjustable, two-stage Oil-gas Separation the diesel engine crankcase closed circulation system of one kind, lead to The mode of two-stage Oil-gas Separation is crossed, it is more efficient to separate crankcase high temperature mixed oil and gas, reduce the consumption of lubricating oil of diesel engine Rate improves economy；Gas participates in burn cycle again after separation, avoids wherein remaining machine oil and is mixed into atmosphere and causes Pollution；Level-one gs-oil separator is arranged in above cylinder, when high temperature mixed oil and gas passes through in crankcase, the machine oil of level-one separation It can be directly flowed into oil sump by cylinder head, the fuel-air mixture after level-one separates passes through adjustable throttling along gas circuit Valve enters in second level Multifunctional oil gas separating device.Multifunctional oil gas separating device is a kind of integrated-type gs-oil separator, the device Outer tube, air inlet pipe, air filter bracket are integrated to one, pass through partition in increasing, formation labyrinth in outer tube and air inlet pipe Formula path can make fuel-air mixture separation more thorough；By way of integrated, the sky of diesel engine arrangement is also greatly saved Between, overcome, occupancy volume excessive disadvantage heavy using double separation oil and gas separators；Gas after separation can be directly entered to Again burning is participated in air inlet pipe, also improves the economy of diesel engine.

The system includes an adjustable throttle valve, and the use of throttle valve can effectively adjust the pressure of crankcase.It solves After separation gas be introduced directly into that booster may cause because booster gettering ability is too strong, crankcase oil gas is led by a large amount of suctions Crankcase is caused to generate negative pressure.Or circulation area hour causes the circulation area of crankshaft pressure throttle valve bigger than normal normally to transport diesel engine Normal crankcase pressure is kept to have strong influence when row.Due to the difference of diesel engine state, for each diesel engine, Optimal circulation area is all had any different when leaving the factory can be in best using every diesel engine of guarantee of adjustable energy maximum possible State.

Detailed description of the invention

Fig. 1 is the circulation schematic diagram of the utility model.

Fig. 2 is the structural schematic diagram of the utility model.

Fig. 3 is the structural representation of Multifunctional oil gas separating device and gas flow schematic diagram in the utility model.

In figure: 1, air filter；2, booster；3, second level gs-oil separator；3-1, connecting flange；3-2, air inlet pipe；3-3, Vacuum meter connector；3-4, front baffle；3-5, oil return pipe；3-6, crankcase breather；3-7, vacuum meter snorkel；3-8, interval Plate；3-9, rear bulkhead；3-10, conical pipe；3-11, outer tube；4, cylinder；5, crankcase；6, level-one gs-oil separator；7, adjustable Formula throttle valve；8, intercooler；9, oil sump.

Specific embodiment

The utility model is illustrated with reference to the drawings and specific embodiments.

As shown in Figure 1, a kind of adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system, the bavin Oil machine crankcase closed circulation system has the level-one gs-oil separator 6 being arranged in cylinder head, the level-one Oil-gas Separation Device 6 is connected to crankcase 5, to carry out level-one separation to the high-temperature oil gas for entering crankcase 5 after burning in cylinder 4；Described one Grade gs-oil separator 6 is connected to oil sump 9 by cylinder head, and the machine oil separated through level-one gs-oil separator is sent into oil sump 9；Institute It states level-one gs-oil separator and second level gs-oil separator 3 is connected to by gas circuit；And in second level gs-oil separator 3 and the primary oil Adjustable throttle valve 7 is provided between gas separating device 6；The second level gs-oil separator 3 is Multifunctional oil gas separating device;In conjunction with Fig. 3, the multifunctional oil gas separator have the air inlet pipe 3-2 being connected to booster 2；The front end of the air inlet pipe 3-2 is Outlet end is connected by connecting flange 3-1 with the booster 2；Rear end, that is, input end of the air inlet pipe 3-2 is provided with Conical pipe 3-10；The conical pipe 3-10 is by the structure of the input end flaring diameter backward of air inlet pipe；The air inlet pipe 3- 2, the outer tube 3-11 of setting concentric with it is equipped on the outside of conical pipe 3-10；The outer tube 3-11 opens for rear and front end The tubular structure of mouth；The front opening of the outer tube 3-11 is by the front baffle 3- that is nested on air inlet pipe 3-2, conical pipe 3-10 4 are sealed；The open rearward end of the outer tube is sealed by the rear bulkhead 3-9 being nested on conical pipe；It is described it is preceding every The middle partition 3-8 being nested on air inlet pipe, conical pipe is additionally provided between plate 3-4 and the rear bulkhead 3-9；The interval Plate 3-8 is to have ring-type jaggy；It is logical that the Multifunctional oil gas separating device is additionally provided with the crankcase being welded on outer tube Cavity between tracheae 3-6, the crankcase breather 3-6 connection front baffle 3-4 and middle partition 3-8；The conical pipe 3- Also there is notch, and notch described on middle partition 3-8 interlocks with notch described on conical pipe 3-10 on 10 side wall surface Setting forms labyrinth type gas passage, make to enter by crankcase breather the high-temperature oil gas in outer tube front baffle, in Labyrinth type, which moves ahead, in the cavity that partition, rear bulkhead are formed carries out Oil-gas Separation, and the gas after separation passes through the ventilation on conical pipe Hole enters conical pipe, air inlet pipe, participates in burning in entering booster, and the machine oil after separation is by being arranged under gs-oil separator The oil return pipe 3-5 in portion is flowed into oil sump 9;The Multifunctional oil gas separating device is also communicated with to separate to multifunctional oil gas Separated air lift carries out cooling intercooler 3 in device；The gas output end of the intercooler is connected to cylinder 4.

A kind of adjustable, two-stage Oil-gas Separation crankcase waste gas circulation theory is as follows: the burning hair of diesel engine It is born in cylinder 4, crankcase 5 is scurried into gap of the high-temperature gas in cylinder 4 between piston and cylinder sleeve；And the components such as piston Temperature is higher, and after the high temperature components such as oil lubricating piston, due to heated, formation high-temperature oil gas gaseous mixture is gathered in crankcase 5 In, so as to form the high-temperature oil gas gaseous mixture in crankcase.The high-temperature oil gas gaseous mixture of crankcase is entered to by cylinder head In gs-oil separator 6, level-one separation is carried out at gs-oil separator 6；The machine oil of level-one separation directly passes through cylinder head and returns to oil In bottom case 5.Fuel-air mixture after level-one separation is entered in Multifunctional oil gas separating device by adjustable throttle valve 7；Oil gas Gaseous mixture is separated by labyrinth type oil-gas, is separated into machine oil and gas, wherein gas enters in booster 2 with air inlet pipe and continues Circulation is participated in, and machine oil is returned in oil sump 5 by oil return pipe.

Claims (1)

1. a kind of adjustable, two-stage Oil-gas Separation diesel engine crankcase closed circulation system, it is characterised in that；The diesel oil Machine crankshaft case closed circulation system has to carry out level-one separation to the high-temperature oil gas for entering crankcase after it has been burned in the cylinder Level-one gs-oil separator, the level-one gs-oil separator is arranged in cylinder head, and is connected to crankcase；The level-one oil gas Separator also passes through cylinder head and is connected to oil sump；The level-one gs-oil separator is connected to second level gs-oil separator by gas circuit；And Adjustable throttle valve is provided between second level gs-oil separator and the level-one gs-oil separator；The second level oil gas point It is Multifunctional oil gas separating device from device;The multifunctional oil gas separator has the air inlet pipe being connected to booster；It is described into Front end, that is, outlet end of tracheae is connected with the booster；Rear end, that is, input end of the air inlet pipe is provided with conical pipe； The conical pipe is by the structure of the input end flaring diameter backward of air inlet pipe；It is nested on the outside of the air inlet pipe, conical pipe There is the outer tube of setting concentric with it；The outer tube is the tubular structure of rear and front end opening；The front end of the outer tube Opening is sealed by the front baffle being nested on air inlet pipe, conical pipe；The open rearward end of the outer tube is by being nested in taper Rear bulkhead on pipe is sealed；It is additionally provided with and is nested in air inlet pipe, taper between the front baffle and the rear bulkhead Middle partition on pipe；The middle partition is to have ring-type jaggy；The Multifunctional oil gas separating device is additionally provided with welding Crankcase breather on outer tube, the cavity between the crankcase breather connection front baffle and middle partition；It is described Also there is notch, and notch described on notch and conical pipe described on middle partition is staggeredly set on the side wall surface of conical pipe It sets, forms labyrinth type gas passage;The Multifunctional oil gas separating device is also communicated with to institute in Multifunctional oil gas separating device Isolated gas carries out cooling intercooler；The gas output end of the intercooler is connected to cylinder.