CN104234782B - A kind of active gs-oil separator of integrated centrifugal type cleaner function - Google Patents

Abstract

The invention relates to an active oil-gas separator integrated with the function of a centrifugal filter, which is characterized in that: the upper end of the base assembly is fixedly connected with the upper shell assembly, and there is a sealing ring at the joint between the base assembly and the upper shell assembly, The inner chamber of the bottom frame assembly is the oil return chamber, the lower end of the inner chamber of the upper shell assembly is equipped with an air outlet chamber assembly, and an "O" type sealing ring is arranged between the air outlet chamber assembly and the upper shell assembly, and the driving shaft assembly Vertically arranged in the cavity formed by the base assembly and the upper shell assembly, the part of the driving shaft assembly located in the base assembly is covered with a centrifugal filter assembly, and the oil spray hole is opened in the centrifugal filter assembly Below, above the centrifugal filter assembly are the auxiliary separation vanes. It achieves two functions by sharing an external auxiliary power, that is, filtering impurities in the oil (centrifugal filtration) and separating oil and gas. It has high reliability and is suitable for medium and heavy-duty diesel engines that are required to meet Euro VI emission regulations. It has a simple structure and is convenient The whole machine layout; the oil and gas separation part does not need maintenance for life, and the oil filter element can be replaced, which reduces the user's cost of use.

Description

An active oil-gas separator with integrated centrifugal filter function

technical field

The invention relates to an active oil-gas separator integrated with the function of a centrifugal filter, which belongs to the technical field of automobiles.

Background technique

In the development of modern engines, compact structure, high integration, and light weight have become an important indicator for evaluating the advanced nature of engines. Centrifugal oil filter, as an important part of diesel engine lubrication system (especially the engine using EGR), has attracted more and more attention from designers. At present, the commonly used centrifugal filter is a separate assembly, and its main body is cast aluminum structure , high cost, large volume, and inconvenient to arrange.

The crankcase ventilation system is an important part of the engine. With the increasingly stringent emission regulations, the crankcase ventilation system has gradually become the content of the regulations. For example, GB11340 issued in 2005 clearly requires that gasoline engines must adopt a closed crankcase ventilation system. Although there is no mandatory requirement for diesel engines at present, the latest Euro VI emission regulations clearly point out that the exhaust gas discharged from the crankcase ventilation system is directly introduced into the exhaust gas for unified testing. The implementation of this regulation will undoubtedly have a huge impetus to the technologies related to the crankcase ventilation system. At present, domestic medium and heavy-duty diesel engines basically adopt the form of open ventilation, and the oil-gas separator is the core component of the crankcase ventilation system, and its structure is mostly labyrinth or Cyclone. Due to its low separation efficiency, this oil-gas separation technology is difficult to meet the requirements of the closed crankcase ventilation system. Mandatory adoption will lead to reduced efficiency of the supercharger, abnormal oil intake and oil consumption of the intercooler, and will eventually lead to problems such as decreased performance and reliability of the overall machine.

Contents of the invention

The purpose of the present invention is to provide an active oil-air separator integrated with the function of a centrifugal filter, which realizes two functions by sharing an external auxiliary power, that is, filtering impurities in the oil (centrifugal filter) and oil-gas separation, reliable High performance, suitable for medium and heavy-duty diesel engines that are required to meet Euro VI emission regulations. It has the advantages of simple structure and convenient layout of the whole machine; the oil-gas separation part does not need maintenance for life, and the oil filter element can be replaced, which reduces the user's use cost.

The technical solution of the present invention is realized as follows: an active oil-gas separator with integrated centrifugal filter function, characterized in that: the upper end of the base assembly is fixedly connected with the upper shell assembly, and the base assembly and the upper shell assembly There is a sealing ring at the joint of the bottom frame assembly, the inner cavity of the bottom frame assembly is an oil return cavity, the lower end of the inner cavity of the upper shell assembly is equipped with an air outlet cavity assembly, and an "O" shape is arranged between the air outlet cavity assembly and the upper shell assembly. The sealing ring, the driving shaft assembly is vertically arranged in the cavity formed by the base assembly and the upper shell assembly, the part of the driving shaft assembly located in the base assembly is covered with a centrifugal filter assembly, and the oil injection hole is opened in the centrifugal filter assembly. The lower part of the centrifugal filter assembly is the auxiliary separation vane above the centrifugal filter assembly; the part of the drive shaft assembly located in the upper shell assembly is covered with a laminated lower body, a laminated sheet, and a laminated upper body from bottom to top. The limit spring and the retaining spring under the lower body of the lamination are fixed on the drive shaft assembly, and the upper part of the lamination is provided with a retaining spring to limit the position; the side cover is fixedly connected to the side of the upper shell assembly, and there is a pressure regulating valve spring and a pressure plate inside the side cover And the diaphragm, the pressure regulating valve spring is installed on the side cover and cooperates with the pressure plate to realize the adjustment of the diaphragm, and the upper shell assembly plays a role in limiting the diaphragm.

The positive effect of the present invention is that the structure is simple, and the arrangement of the whole machine is convenient; the oil-gas separation part does not need maintenance for life, and the oil filter element can be replaced, which reduces the user's cost; the reliability is high, and it is suitable for medium and heavy-duty diesel engines that meet Euro VI emission regulations.

Description of drawings

Fig. 1 is a schematic structural diagram of an active oil-gas separator integrated with a centrifugal filter function of the present invention.

detailed description

The present invention will be further described below in conjunction with the accompanying drawings and embodiments: As shown in Figure 1, an active oil-gas separator with integrated centrifugal filter function is characterized in that: the upper end of the base assembly 1 and the upper shell assembly 10 Fixed connection, there is a sealing ring 11 at the connection between the base assembly 1 and the upper shell assembly 10, the inner cavity of the bottom frame assembly 1 is an oil return cavity 19, and the lower end of the inner cavity of the upper shell assembly 10 is equipped with an air outlet cavity assembly 5, An "O"-shaped sealing ring 13 is provided between the air outlet chamber assembly 5 and the upper shell assembly 10, and the drive shaft assembly 2 is vertically arranged in the cavity formed by the base assembly 1 and the upper shell assembly 10, and the drive shaft assembly The part 2 located in the base assembly 1 is covered with a centrifugal filter assembly 2, the oil injection hole 18 is opened below the centrifugal filter assembly 2, and the upper part of the centrifugal filter assembly 2 is auxiliary separation The blade 4; the part of the driving shaft assembly 2 located in the upper shell assembly 10 is covered with a laminated lower body 6, a laminated sheet 7, and a laminated upper body 8 from bottom to top, and a limit spring 12 and a retaining spring 9 are fixed under the laminated lower body 6 On the driving shaft assembly 3, there is a retaining spring 9 limit above the upper body 8 of the stack; the side cover 15 is fixedly connected to the side of the upper shell assembly 10, and the side cover 15 has a pressure regulating valve spring 14, a pressure plate 16 and a diaphragm inside 17. The pressure regulating valve spring 14 is installed on the side cover 15 and cooperates with the pressure plate 16 to adjust the diaphragm 17, and the upper case assembly 10 acts as a limiter for the diaphragm 17.

Example

The high-pressure lubricating oil enters the centrifugal filter assembly 2 through the base assembly 1. With the high-speed rotation of the centrifugal filter assembly 2, under the action of the inertial centrifugal force generated by the high-speed rotation, the lubricating oil contained in the lubricating oil Particulate impurities are deposited on the inner wall of the centrifugal filter assembly 2. And the lubricating oil after filtering will be ejected rapidly along the two nozzle holes 18 of the centrifugal filter assembly 2, and the reaction force of the oil flow injection promotes the centrifugal filter assembly 2 to rotate at a high speed. The centrifugal filter assembly 2 is fixed together with the drive shaft assembly 3 through threads. When the engine runs for a certain mileage, the filtering effect of the centrifugal filter assembly 2 gradually loses as the impurities attached to the inside increase. At this time, it is only necessary to unscrew the centrifugal filter assembly 2 on the driving shaft assembly 3 and replace it with a new centrifugal filter assembly 2, and the maintenance is simple and quick.

Since the driving shaft assembly 3 is fixed together with the centrifugal filter assembly 2 through threads, and the laminations 7, the upper body of the laminations 8 and the lower body of the laminations 6 are fixed on the driving shaft assembly through the limit spring 12 and the retaining spring 9. 3, so the lamination 7, the drive shaft assembly 3 and the centrifugal filter assembly 2 rotate at high speed synchronously. When the oil-air mixture from the crankcase passes through the laminations 7 rotating at high speed during the rotation process, the total oil droplets of the mixture fly away from the laminations 7 and hit the inner wall of the upper shell assembly 10 under the action of inertial centrifugal force. The oil droplets accumulated below flow into the air outlet cavity assembly 5 and finally flow into the oil return cavity 19 . The separated clean gas passes through the gas outlet chamber assembly 5 and finally enters the gas outlet of the oil-gas separator.

Due to the closed crankcase ventilation system, the engine has certain restrictions on the crankcase pressure. The present invention controls the crankcase pressure by arranging a pressure regulating valve at the outlet of the air outlet cavity assembly 5 . When the pressure produced by the negative pressure of the crankcase and the negative pressure at the outlet of the pressure regulating valve is less than the preload of the pressure regulating valve spring 14, a maximum gap is maintained between the diaphragm 17 and the air outlet. As the negative pressure at the outlet of the pressure regulating valve increases, the pressure regulating spring 14 is compressed, and the gap between the diaphragm 17 and the air outlet gradually decreases until it is completely closed. The size of the gap determines the size of the gas flow, and the pressure regulating valve adjusts the crankcase pressure by controlling the gas flow.

Since the high-pressure oil is sprayed into the oil return chamber through the spray hole 18 on the centrifugal filter assembly 2, the oil will splash, so an auxiliary separation impeller 4 is added between the air outlet chamber assembly 5 and the oil return chamber. It is fixed on the drive shaft assembly 3 and rotates at high speed thereupon. Under the action of centrifugal force, the splashed oil droplets are prevented from entering the air outlet chamber assembly 5, and at the same time, it is ensured that the separated oil droplets can flow smoothly into the oil return chamber.

In addition, in order to prevent oil leakage during operation, a sealing ring 11 is provided between the base assembly 1 and the upper shell assembly 10 . An "O"-shaped sealing ring 13 is provided between the air outlet cavity assembly 5 and the upper shell assembly 10 .

Claims (1)

1. an active gs-oil separator for integrated centrifugal type cleaner function, including upper housing assy, base assembly, sealing ring and driving shaft assembly；It is characterized in that: base assembly upper end is fixing with upper housing assy to be connected, base assembly has sealing ring with the junction of upper housing assy, chassis assembly inner chamber is oil back chamber, upper housing assy inner chamber lower end is equipped with outlet chamber assembly, " O " RunddichtringO it is provided with between outlet chamber assembly and upper housing assy, driving shaft assembly is arranged vertically in the cavity of base assembly and upper housing assy composition, driving shaft assembly is positioned at the part of base assembly and is cased with spin-on filter assembly, machine oil spray orifice is opened in the lower section of spin-on filter assembly, spin-on filter assembly is arranged above assisting separate blade；Driving shaft assembly is positioned at the part of housing assy and is cased with lamination lower body, lamination, lamination upper body from bottom to up, and below lamination lower body, limited location spring and jump ring are fixed on driving shaft assembly, have jump ring spacing above lamination upper body；Side cover is fixedly connected on the side of housing assy, has pressure-regulating valve spring, pressing plate and diaphragm, pressure-regulating valve spring to be arranged on side cover with pressing plate and coordinate the regulation realized diaphragm inside side cover, and diaphragm is played position-limiting action by upper housing assy.