CN213775483U - Closed respirator - Google Patents

Abstract

The utility model provides a closed respirator, which is arranged on an engine cylinder body and comprises an air inlet and an oil return port, wherein the engine cylinder body is provided with an air outlet and an oil return hole; the air inlet is directly connected to the air outlet and is used for enabling the closed respirator to directly take air from an engine cylinder; the oil return port is directly connected to the oil return hole and used for enabling the closed breather to directly return and discharge the engine oil intercepted from the exhaust of the engine cylinder body to the engine cylinder body. By eliminating the connecting pipeline between the breather and the cylinder body, the pipeline arrangement and the structure of the engine are simplified, the failure rate of the breather in the operation process is reduced, and the service life of the whole engine is effectively prolonged.

Description

Closed respirator

Technical Field

The utility model relates to an engine field especially relates to a closed respirator that can independently get gas and return oil.

Background

With the requirements of the automobile and the engine on emission and sealing, closed respirators are increasingly adopted for ventilation of the crankcase, the number of interfaces of the closed respirators is large, pipelines are complex, and some pipelines even need to wind a half engine. When the respirator is used for air intake, the external pipeline can cause large heat loss, so that water vapor in the air is cooled and condensed in the pipeline, the condensed water can flow into the respirator after the respirator is stopped, and the condensed water can be easily frozen in the respirator when the temperature is low.

Closed respirator can appear channeling oil mass greatly because the space leads to the oil return when high not enough usually, and engine oil emulsification and oil return pipeline block up the scheduling problem, can damage whole engine when serious.

SUMMERY OF THE UTILITY MODEL

Problem to prior art existence, the utility model aims to provide a closed respirator has cancelled the intake pipe between respirator and the engine cylinder body, has simplified the pipe arrangement of engine, avoids the respirator to freeze to can solve the oil return highly not enough and return oil pipe way and block up the scheduling problem.

The utility model provides a closed respirator, which is arranged on an engine cylinder body and comprises an air inlet and an oil return port, wherein the engine cylinder body is provided with an air outlet and an oil return hole;

the air inlet is directly connected to the air outlet and is used for enabling the closed respirator to directly take air from an engine cylinder;

the oil return port is directly connected to the oil return hole and used for enabling the closed breather to directly return and discharge the engine oil intercepted from the exhaust of the engine cylinder body to the engine cylinder body.

Further, the engine cylinder body is connected with an exhaust manifold, and the closed breather is arranged at a position close to the exhaust manifold.

Further, the bottom edge of the oil return opening is higher than the bottom edge of the oil return hole.

Furthermore, a one-way valve is installed inside the oil return port and used for preventing oil in the oil return hole from flowing back to enter the closed respirator through the oil return port.

Further, the check valve is a spring check valve or a hydraulic check valve.

Further, a connecting flange is arranged on the engine cylinder body, and the air outlet and the oil return hole are formed in the inner side of the connecting flange.

Furthermore, the closed respirator comprises a flange plate which is connected with the connecting flange in a matched mode, and a sealing gasket is arranged between the connecting flange and the flange plate.

Furthermore, a sealing groove for accommodating the sealing gasket is arranged on the connecting flange.

Furthermore, a plurality of pairs of studs are arranged on the side wall of the engine cylinder body, and the plurality of pairs of studs are arranged on the side wall in a step shape.

Further, the closed type breather is detachably connected to the engine block through a bolt.

The utility model discloses a connecting tube between cancellation respirator and the cylinder body has simplified the pipeline arrangement and the structure of engine, has reduced the fault rate of respirator in the operation process, has effectively improved the life of engine complete machine.

Drawings

The present invention will be described in more detail hereinafter based on embodiments and with reference to the accompanying drawings. Wherein:

FIG. 1 is a schematic view of the installation of the medium-closed respirator of the present invention on an engine cylinder;

FIG. 2 is a schematic illustration of the construction of the engine block side wall;

FIG. 3 is a schematic cross-sectional view of a closed breather and an engine cylinder at an oil return port;

FIG. 4 is a schematic cross-sectional view of the closed-type breather and the engine block at the air inlet;

fig. 5 is a schematic view of a connection structure between the closed type respirator and the engine block.

In the drawings, like parts are designated with like reference numerals, and the drawings are not to scale.

Detailed Description

For the purpose of clearly explaining the contents of the present invention, the present invention will be described below with reference to the following embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

As shown in fig. 1-5, the closed breather 2 provided by the present invention is installed on an engine cylinder 1, and includes an air inlet 22 and an oil return port 23, and the engine cylinder 1 is provided with an air outlet 11 and an oil return port 12; the air inlet 22 is directly connected to the air outlet 11 and is used for enabling the closed respirator 2 to directly take air from the engine cylinder 1; the oil return port 23 is directly connected to the oil return hole 12, and is used for enabling the closed breather 2 to directly return the engine oil intercepted from the exhaust gas of the engine cylinder 1 to the engine cylinder 1.

The utility model provides a closed respirator 2, direct mount are on engine cylinder body 1, through the air inlet pipeline and the oil return line of cancellation respirator, have simplified the pipeline arrangement between closed respirator 2 and the engine cylinder body 1, make the respirator can directly get gas from engine cylinder body 1 in to directly return the machine oil that gets off with the respirator from the cylinder body exhaust and arrange to engine cylinder body 1 in, make the respirator have the function of independently getting gas and oil return.

From the angle of independently getting gas, through the air inlet pipeline of cancelling the respirator, reduced the respirator and admitted air the calorific loss in the pipeline transmission, avoided the respirator to appear situations such as freezing.

The respirator has an autonomous oil return function, so that engine oil in the respirator can automatically flow back to the inside of the engine cylinder, the problems of engine oil emulsification, blockage of an oil return pipeline and the like caused by insufficient oil return height are avoided, and the operating environment of the closed respirator is fundamentally improved.

The utility model discloses in be connected with exhaust manifold 3 on engine cylinder block 1, closed respirator 2 is installed at the position that is close to exhaust manifold 3. Exhaust manifold 3's operating temperature is higher when normal operating, through this kind of mounting means of closed respirator 2, can make closed respirator 2 fully receive 3 heat-conduction of exhaust manifold or the heat that the radiation distributed out, improves the temperature of 2 bodies of closed respirator, has further reduced closed respirator 2's calorific loss, and the cooling that reduces the respirator and admit air vapor condenses, avoids appearing the phenomenon of freezing when low temperature.

Referring to fig. 3-4, in one embodiment, the shape of the oil return opening 23 on the closed breather 2 and the shape of the oil return hole 12 on the engine cylinder 1 are both square, and the height of the bottom edge of the oil return opening 23 is higher than that of the oil return hole 12, that is, the lower edge of the breather oil return opening 23 is higher than that of the oil return hole 12 on the engine cylinder 1, so that the oil return pressure of the engine oil can be reduced, and the smoothness of the backflow of the engine oil from the breather to the engine cylinder 1 is ensured. In the connection of current respirator and engine cylinder 1, often lead to in engine oil flows back to the respirator from engine cylinder 1 because the oil return height is not enough, in order to solve above-mentioned problem, in this embodiment at closed respirator 2's oil return 23 internally mounted have check valve 24, check valve 24's setting can effectively prevent that the engine oil of cylinder oil return hole 12 from passing through oil return 23 refluence and getting into closed respirator 2, fundamentally prevents appearing returning scurring of engine oil. The check valve in the embodiment is a spring check valve, and engine oil can be effectively blocked from flowing back from the engine cylinder body to the breather through the elasticity of the spring. Besides the spring one-way valve, a hydraulic one-way valve can be selected, and the technical purpose of preventing the engine oil from flowing backwards can be achieved.

In the embodiment, the air inlet 22 is directly connected with the air outlet 11, so that exhaust in the engine cylinder body 1 can directly enter the body of the closed breather 2, the breather exhaust pipe 25 is connected to the breather, and after micro oil drops in the exhaust of the cylinder body are intercepted by the breather, the intake air is exhausted through the breather exhaust pipe 25 positioned at the top, so that the path of air is greatly reduced, and the cooling and condensation of vapor in the exhaust are fundamentally avoided.

Referring to fig. 2 in combination with fig. 5, in another embodiment, the engine block 1 is provided with a connecting flange 13, the connecting flange 13 is specifically mounted on the side wall of the block, and the air outlet 11 and the oil return 12 of the block are arranged on the inner side of the connecting flange 13. The closed respirator 2 comprises a flange 21 which is matched and connected with the connecting flange 13, and an air inlet 22 and an oil return hole 12 are arranged on the inner side of the flange 21. During specific installation, the air inlet 22 and the air outlet 11, the oil return hole 12 and the oil return port 23 are respectively and relatively directly connected through the matched connection of the connecting flange 13 and the flange plate 21, so that the installation accuracy of the two pairs of interfaces is reliably guaranteed.

In order to ensure that the joint of the engine cylinder body 1 and the closed respirator 2 is effectively sealed, a sealing gasket (not shown in the figure) is arranged between the connecting flange 13 and the flange plate 21, the sealing gasket is specifically arranged in the circumferential direction of the paired flanges, and the sealing gasket is in the form of a circular rubber sealing gasket, so that the leakage of gas and oil return at the joint can be prevented. In order to ensure the sealing effect, the sealing gasket in this embodiment is embedded in the connecting flange 13, and the connecting flange 13 is provided with the sealing groove 14 for accommodating the sealing gasket, so that the connecting flange 13 and the flange 21 can be connected more tightly. Besides the rubber sealing gasket, the rubber sealing gasket or the steel gasket plus the flexible coating can be used for sealing according to the actual application.

In the present embodiment, a plurality of pairs of horizontally extending studs are disposed on the side wall of the engine block 1, including two pairs of fastening studs 41 located on the circumferential outer side of the connecting flange 13, and a mounting stud 42 located on the upper portion of the fastening stud 41. The fastening stud 41 mainly serves to reinforce the connection strength between the connecting flange 13 and the flange 21 and improve the sealing effect of the sealing gasket on the premise of ensuring tight connection between the connecting flange and the flange.

Based on the fact that the connection of the two pairs of fastening studs 41 is not enough to bear the whole weight of the closed-type respirator 2, the mounting studs 42 positioned above the fastening studs 41 enhance the bearing effect, and the stability of the installation of the closed-type respirator 2 on the engine cylinder body 1 can be effectively ensured through the mounting studs 42.

In order to facilitate the processing of the engine cylinder block 1, the plurality of pairs of studs in the present embodiment are arranged on the side wall of the cylinder block in a step shape, that is, the extending ends of the plurality of pairs of studs are not on the same vertical plane, but are distributed in a step shape from top to bottom. In the processing process of the existing engine cylinder block 1, if the extending tail ends of the plurality of pairs of studs are distributed on the same plane, the extending length of the mounting stud 42 is too long, which increases the processing difficulty of the engine cylinder block 1 on one hand, and on the other hand, reduces the connection strength of the closed type respirator 2 on the cylinder block greatly. Through the studs with different extension lengths, the closed type breather 2 can be more stably installed on the engine cylinder body 1, and the processing difficulty of the cylinder body can be effectively reduced.

The utility model provides a closed respirator is through the bolt mounting on the engine cylinder body, through bolt and many cooperation installations to the double-screw bolt, can realize the dismantlement of closed respirator on the engine cylinder body and connect, makes things convenient for the maintenance and the maintenance in later stage.

It is important to point out that the connecting pipeline between the breather and the cylinder body is omitted, so that the pipeline arrangement and the structure of the engine are simplified, the failure rate of the breather in the operation process is reduced, and the service life of the whole engine is effectively prolonged.

It should be noted that the positions and the numbers of the fastening studs and the mounting studs can be actually adjusted according to the specific equipment model, which is a routine choice of the skilled person in the art according to the inventive concept of the present invention, and will not be described herein again.

Finally, it is to be understood that the above embodiments are merely exemplary embodiments that have been employed to illustrate the principles of the present invention, and that the present invention is not limited thereto. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention, and these changes and modifications are to be considered as the protection scope of the invention.

Claims (10)

1. A closed respirator is installed on an engine cylinder body and is characterized by comprising an air inlet and an oil return port, wherein the engine cylinder body is provided with an air outlet and an oil return hole;

the air inlet is directly connected to the air outlet and is used for enabling the closed respirator to directly take air from an engine cylinder;

the oil return port is directly connected to the oil return hole and used for enabling the closed breather to directly return and discharge the engine oil intercepted from the exhaust of the engine cylinder body to the engine cylinder body.

2. A closed respirator according to claim 1 wherein an exhaust manifold is connected to the engine block, the closed respirator being mounted adjacent the exhaust manifold.

3. The closed respirator of claim 1, wherein the bottom edge of the oil return port is higher than the bottom edge of the oil return hole.

4. The closed respirator of claim 1, wherein a check valve is installed inside the oil return hole for preventing the oil in the oil return hole from flowing back into the closed respirator through the oil return hole.

5. The closed respirator of claim 4, wherein the check valve is a spring check valve or a hydraulic check valve.

6. The closed respirator of claim 1, wherein the engine block is provided with a connecting flange, and the air outlet and the oil return hole are arranged on the inner side of the connecting flange.

7. The closed respirator of claim 6, further comprising a flange that is cooperatively connected to the connecting flange, and a sealing gasket is disposed between the connecting flange and the flange.

8. The closed respirator of claim 7, wherein the attachment flange is provided with a seal groove for receiving the sealing gasket.

9. The closed respirator of any one of claims 1-8, wherein a plurality of pairs of studs are disposed on a side wall of the engine block, the plurality of pairs of studs being arranged in a step-like arrangement on the side wall.

10. The closed respirator of claim 9, wherein the closed respirator is removably attached to the engine block by bolts.

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