CN207686787U - Oil and gas separating system built in valve mechanism cover - Google Patents

Abstract

The utility model discloses an oil-gas separation system built in a cylinder head cover. The built-in oil and gas separation system of the cylinder head cover includes: a built-in oil and gas separator, including: a cover body and a labyrinth cavity and a bottom cover arranged on one side of the cover body, and one end of the labyrinth cavity is provided with a The external air outlet pipe has a respirator socket on the top; the labyrinth cavity is equipped with a coarse filter orifice, a circuitous rectification structure, a fine filter orifice and a partition plate, and the coarse filter orifice is set between the inlet orifice and the circuitous Between the type rectification structures, the fine filter orifice plate is arranged downstream of the circuitous rectification structure, and the spacer plate is arranged downstream of the fine filter orifice plate; one end of the bottom cover has an inlet orifice plate; and the respirator assembly includes : a housing, and a diaphragm and a spring arranged in the housing, the lower end of the housing has a plug. The built-in oil-air separation system of the cylinder head cover can effectively prevent the oil from deteriorating, and prevent the crankshaft oil seal and crankcase liner from leaking.

Description

Cylinder head cover built-in oil and gas separation system

technical field

The utility model relates to the field of engines, in particular to an oil-gas separation system built into a cylinder head cover.

Background technique

When the engine is working, part of the combustible mixture and exhaust gas will escape into the crankcase through the piston ring, and the gasoline vapor condensed into the crankcase will make the engine oil thinner and the performance will deteriorate. The exhaust gas contains water vapor and sulfur dioxide. The water vapor condenses in the engine oil to form foam, which damages the oil supply. This phenomenon is especially serious in winter; sulfur dioxide meets water to form sulfurous acid, and sulfurous acid forms sulfuric acid when it meets oxygen in the air. The appearance of oil not only deteriorates the oil, but also corrodes the parts. As the combustible mixture and exhaust gas escape into the crankcase, the pressure in the crankcase will increase, and the oil will seep from the crankshaft oil seal, crankcase liner, etc. and lose. The oil vapor lost to the atmosphere will increase the pollution of the engine to the atmosphere.

The built-in oil-air separation system of the existing cylinder head cover has a relatively poor effect of avoiding or alleviating the above-mentioned phenomenon, and cannot effectively prevent the deterioration of the machine oil, and prevent the leakage of the crankshaft oil seal and the crankcase liner.

The information disclosed in this background section is only intended to increase the understanding of the general background of the present invention, and should not be considered as an acknowledgment or in any form to imply that the information constitutes the prior art already known to those skilled in the art.

Utility model content

The purpose of the utility model is to provide a simple and reasonable structure of the built-in oil-gas separation system of the cylinder head cover. The built-in oil-gas separation system of the cylinder head cover can effectively prevent the deterioration of the engine oil and prevent the leakage of the crankshaft oil seal and the crankcase liner.

In order to achieve the above purpose, the utility model provides a built-in oil-gas separation system of a cylinder head cover, including: a built-in oil-gas separator, including: a cover body and a labyrinth cavity and a bottom cover arranged on one side of the cover body, so One end of the labyrinth chamber is provided with an air outlet pipe extending to the outside of the cover, and a respirator socket is provided on the top; the labyrinth chamber is provided with a coarse filter orifice, a circuitous rectification structure, a fine filter orifice and a partition plate. The circuitous rectification structure described above all includes: horizontal baffles protruding from the two sides of the labyrinth cavity and arranged at intervals, the end of the horizontal baffle on one side of the labyrinth cavity and the other side cavity The horizontal baffles on the chamber walls on both sides are arranged to engage with each other and form a circuitous rectification channel; the coarse filter orifice is arranged upstream of the circuitous rectification structure, and the fine filter orifice is arranged at the circuitous rectification structure Downstream of the fine filter orifice, the partition plate is arranged downstream of the fine filter orifice, which is provided with an oil and gas outlet and an oil and gas chute; one end of the bottom cover has an inlet orifice through which oil and gas in the crankcase enter A labyrinth cavity; the middle part of the bottom cover is provided with a downwardly recessed first oil return chute, and the bottom of the first oil return chute is provided with a first oil return pipe communicating with the inner cavity of the engine. The other end is provided with a downwardly recessed second oil return chute, the second oil return chute is set corresponding to the respirator socket, and the bottom of the second oil return chute is provided with a first oil return chute corresponding to the respirator assembly. Two oil return pipes; and a respirator assembly, including: a casing, a diaphragm and a spring arranged in the casing, the lower end of the casing has a plug for connecting with the respirator socket of the labyrinth cavity.

Preferably, in the above technical solution, the distance between the transverse baffle and the wall of the labyrinth cavity on the opposite side is 1/4 to 1/3 of the width of the cavity, and the distance between two adjacent transverse baffles is One-third to two-thirds of body width.

Preferably, in the above technical solution, the coarse filter hole plate is provided with a plurality of coarse filter through holes, and the fine filter hole plate is provided with a plurality of fine filter through holes, and the plurality of coarse filter through holes and the plurality of fine filter through holes are both Arranged in a rectangular matrix, and the diameter of the coarse filter through holes is larger than the diameter of the fine filter through holes.

Preferably, in the above technical solution, the lower part of the first oil return pipe is provided with an oil return elbow.

Compared with the prior art, the utility model has the following beneficial effects: the built-in oil-gas separation system of the cylinder head cover can make the oil-gas detour forward through the orifice plate, and continuously separate the oil-gas. Such circulation can effectively separate the oil-gas, and the separation effect is good. Avoid environmental pollution caused by oil and gas discharge; ensure the air pressure balance in the engine, and quickly separate the fuel in the oil and gas to avoid mixing with engine oil and polluting the engine oil, affecting the lubricating effect and sealing effect of the engine oil, and preventing crankshaft oil seals and crankcase gaskets from leaking , to ensure the good operation of the engine and improve the working life of the engine.

Description of drawings

Fig. 1 is a structural schematic diagram of a built-in oil-gas separation system in a cylinder head cover of the present invention.

Fig. 2 is a schematic diagram of the upper exploded structure of the built-in oil-gas separation system of the cylinder head cover of the utility model.

Fig. 3 is a schematic diagram of the lower exploded structure of the built-in oil-gas separation system of the cylinder head cover of the present invention.

Fig. 4 is a front structural diagram of the rough filter orifice plate of the built-in oil-gas separation system of the cylinder head cover of the utility model.

Fig. 5 is a schematic cross-sectional structure diagram of the coarse filter orifice plate of the built-in oil-gas separation system of the cylinder head cover of the utility model.

Fig. 6 is a structural schematic diagram of the spacer plate of the oil-gas separation system built into the cylinder head cover of the present invention.

Fig. 7 is a schematic structural diagram of the respirator assembly of the cylinder head cover built-in oil-gas separation system of the present invention.

Detailed ways

The specific embodiments of the present utility model will be described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present utility model is not limited by the specific embodiments.

Unless expressly stated otherwise, throughout the specification and claims, the term "comprise" or variations thereof such as "includes" or "includes" and the like will be understood to include the stated elements or constituents, and not Other elements or other components are not excluded.

As shown in Figures 1 to 7, the cylinder head cover built-in oil-gas separation system according to the specific embodiment of the present invention specifically includes: a built-in oil-gas separator 12 and a respirator assembly 13, wherein the built-in oil-gas separator includes a cover body and The labyrinth cavity and the bottom cover are arranged on one side of the cover body. The labyrinth cavity 2 is arranged on one side of the cover body 1. One end of the labyrinth cavity 2 is provided with an air outlet connecting pipe 3 extending to the outside of the cover. The labyrinth cavity The top of this end of the body 2 is provided with a respirator socket. The labyrinth cavity 2 is provided with a rough filter orifice 14, a circuitous rectification structure, a fine filter orifice 16 and a spacer plate 15, wherein the circuitous rectification structure includes: convex holes on both sides of the labyrinth cavity 2 The horizontal baffles 7 arranged at intervals are provided, the ends of the horizontal baffles 7 on one side of the labyrinth cavity 2 are adapted to the other side of the cavity, and the horizontal baffles 7 on the two sides of the cavity are engaged with each other. Arrange and form a roundabout rectification channel. The coarse filter orifice plate 14 is arranged upstream of the circuitous rectification structure, and is used for coarse filtering of oil and gas. The fine filter orifice plate 16 is arranged downstream of the circuitous rectification structure, and is used for fine filtering oil and gas. The spacer plate 15 is arranged downstream of the fine filter hole plate 16, and it is provided with an oil-gas outlet and an oil-gas chute, and the oil gas filtered by the fine filter hole plate 16 enters the gas outlet connecting pipe through the oil-gas hole and the oil-gas chute of the spacer plate 15 3. Further separation of oil and gas.

Preferably, the distance between the horizontal baffle 7 and the wall of the labyrinth cavity 2 on the opposite side is 1/4 to 1/3 of the width of the cavity, and the interval between two adjacent horizontal baffles 7 is the cavity width. One-third to two-thirds of the width ensures that the gas passes quickly and effectively separates oil and gas, and the oil and gas separation effect is good.

Preferably, the coarse filter hole plate 14 is provided with a plurality of coarse filter through holes, and the fine filter hole plate 16 is provided with a plurality of fine filter through holes, and a plurality of coarse filter through holes and a plurality of fine filter through holes are arranged in a rectangular matrix, And the diameter of the coarse filter through hole is larger than the diameter of the fine filter through hole.

The cover body 1 is provided with a bottom cover 4 that closes the labyrinth cavity 2, and one end of the bottom cover 4 has an inlet orifice through which oil and gas in the crankcase enter the labyrinth cavity. Preferably, the inlet orifice plate is provided with a plurality of inlet through holes in a rectangular matrix for primary filtering of oil and gas. The middle part of the bottom cover 4 is provided with a downwardly recessed first oil return chute 9 . The bottom of the first oil return chute 9 is provided with a first oil return pipe 11 communicating with the engine cavity, and an oil return elbow 5 is bent at the bottom of the first oil return pipe 11 to prevent oil sucking back and effectively recover oil. (located between the coarse filter orifice 14 and the fine filter orifice 16). The oil and gas generated by the engine enters the labyrinth cavity 2 through the inlet orifice, and then flows to the outlet connecting pipe 3. After passing through the roundabout coarse filter orifice 14, the fine filter orifice 16 and the roundabout rectification junction, the flow direction of the oil and gas changes continuously, fully In contact with the roundabout rectification structure, the oil in the oil and gas will gradually separate out and fall to the oil return structure of the bottom cover 4 for collection, and the gas in the oil and gas will be discharged out of the engine through the air outlet connection 3 to ensure the air pressure in the engine At the same time, the fuel in the oil and gas can be quickly separated to avoid mixing with the engine oil and polluting the engine oil, affecting the lubricating effect and sealing effect of the engine oil, preventing the leakage of the crankshaft oil seal and the crankcase gasket, ensuring the good operation of the engine and improving the working life of the engine ; The diversion effect of the roundabout rectification structure is good, and the oil and gas can be separated quickly.

Preferably, the other end of the bottom cover 4 is provided with a downwardly recessed second oil return chute 10 , and the second oil return chute 10 is provided correspondingly to the respirator socket of the labyrinth cavity 2 . The bottom of the second oil return chute 10 is provided with a second oil return pipe 17 corresponding to the breather assembly.

First, the oil and gas enter from the inlet orifice, and change the flow direction after encountering the coarse filter orifice 14 and the horizontal baffle 7 of the circuitous rectification structure. The orifice plate 16 and the spacer plate 15 continuously separate the oil and gas, and such circulation can effectively separate the oil and gas, and the separation effect is good, and the environmental pollution caused by the discharge of oil and gas is avoided.

In this embodiment, the gas outlet connector 3 combines the structural design of the orifice plate and the circuitous rectification structure, and is compatible with the gas outlet connector 3 that facilitates the circuitous rectification channel, which helps the gas to be discharged quickly and prevents oil from entering the gas outlet connector 3 . The first oil return pipe 11 and the second oil return pipe on the bottom cover 4 are connected by welding, the sealing effect is good, and there is no leakage; the edge of the bottom cover 4 and the cover body 1 are fixed by bolts, and the fixing is stable and firm.

The respirator assembly 13 includes: a housing, and a diaphragm and a spring arranged in the housing. The lower end of the housing has a plug for connecting with the respirator socket of the labyrinth cavity 2 . The function of the respirator assembly is to develop and determine the internal pressure balance point of the engine according to the performance of the engine, and determine the pressure of the air inlet and outlet of the pressure regulating valve by adjusting the control of the spring force. When the gas coming out is lower than the intake pressure of the intake system, that is, the negative pressure, the air filtered by the outside intake system makes the spring force of the spring decrease and is relaxed; when the gas coming out is positive pressure, the gas from the oil-gas separator The gas pushes the diaphragm, so that the spring spring force increases and is further compressed, so that the gas is discharged into the engine intake system to realize the exhaust gas circulation, which ensures the sealing of the entire structure and the efficiency of oil and gas separation and sealing problems.

To sum up, the built-in oil and gas separation system of the cylinder head cover can make the oil and gas move forward through the orifice plate, and continuously separate the oil and gas. Such a cycle can effectively separate the oil and gas, and the separation effect is good, avoiding environmental pollution caused by oil and gas discharge; ensuring the air pressure in the engine At the same time, the fuel in the oil and gas can be quickly separated to avoid mixing with the engine oil and polluting the engine oil, affecting the lubricating effect and sealing effect of the engine oil, preventing the leakage of the crankshaft oil seal and the crankcase gasket, ensuring the good operation of the engine and improving the working life of the engine .

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. These descriptions are not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art can realize and utilize various exemplary embodiments of the present invention and various Different options and changes. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims (4)

1. A cylinder head cover built-in oil-gas separation system, characterized in that it comprises: Built-in oil and gas separator, including: a cover body, a labyrinth cavity and a bottom cover arranged on one side of the cover body, one end of the labyrinth cavity is provided with an air outlet pipe extending to the outside of the cover, and a respirator is opened on the top Socket; the labyrinth cavity is provided with a rough filter orifice, a circuitous rectification structure, a fine filter orifice and a spacer plate, and the circuitous rectification structure includes: protruding from the two side walls of the labyrinth cavity The horizontal baffles arranged at intervals, the end of the horizontal baffle on one side of the labyrinth cavity is adapted to the other side of the cavity, and the horizontal baffles on the two sides of the cavity are arranged to engage with each other and form a roundabout rectification channel The coarse filter orifice is arranged on the upstream of the circuitous rectification structure, the fine filter orifice is arranged on the downstream of the circuitous rectification structure, and the partition plate is arranged on the downstream of the fine filter orifice, which is provided with an oil and gas filter One end of the bottom cover has an inlet orifice through which the oil and gas in the crankcase enter the labyrinth cavity; the middle of the bottom cover is provided with a downwardly recessed first oil return chute , the bottom of the first oil return chute is provided with a first oil return pipe communicating with the engine cavity, and the other end of the bottom cover is provided with a downwardly recessed second oil return chute, the second oil return chute Corresponding to the respirator socket, the bottom of the second oil return chute is provided with a second oil return pipe corresponding to the respirator assembly; and The respirator assembly includes: a casing, and a diaphragm and a spring arranged in the casing. The lower end of the casing has a plug for connecting with the respirator socket of the labyrinth cavity. 2. The cylinder head cover built-in oil and gas separation system according to claim 1, characterized in that the distance between the transverse baffle and the wall of the labyrinth cavity on the opposite side is 1/4 to 1/3 of the cavity width 1. The interval between two adjacent transverse baffles is 1/3 to 2/3 of the cavity width. 3. The built-in oil-gas separation system of the cylinder head cover according to claim 1, wherein the coarse filter orifice plate is provided with a plurality of coarse filter through holes, and the fine filter orifice plate is provided with a plurality of fine filter through holes , a plurality of coarse filter through holes and a plurality of fine filter through holes are arranged in a rectangular matrix, and the diameter of the coarse filter through holes is larger than the diameter of the fine filter through holes. 4. The oil-air separation system with built-in cylinder head cover according to claim 1, characterized in that an oil return elbow is arranged at the lower part of the first oil return pipe.