Diesel engine respirator

Abstract

The utility model provides a diesel engine respirator which comprises a shell, an air inlet pipe, an air outlet pipe and an oil outlet pipe, the air inlet pipe is installed on the top side of the shell, the air outlet pipe and the oil outlet pipe are installed on the bottom side of the shell, the air inlet connecting pipe is installed in the shell and communicated with the air inlet pipe, and the diameter of the middle of the air inlet connecting pipe is smaller than that of the two ends of the air inlet connecting pipe. The inner barrel is arranged between the air inlet connecting pipe and the shell, the top end of the inner barrel is open, liquid outlet holes are evenly formed in the bottom side of the inner barrel, a protruding structure is arranged in the middle of the bottom side of the inner barrel, the air outlet pipe extends into the shell and is located on the bottom side of the protruding structure, and the shell, the inner barrel and the air inlet connecting pipe are coaxially arranged; the partition plates are evenly arranged between the air inlet connecting pipe and the inner cylinder and between the inner cylinder and the shell. According to the diesel engine respirator, oil and gas are separated by arranging the partition plate, the cross section of an approximately-S-shaped oil and gas channel formed by the partition plate is large, oil sludge is not prone to blocking the channel, and reliable operation of a diesel engine is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of oil and gas separation, in particular to a diesel engine breather. Background Technique

[0002] When a diesel engine is working, a part of the combustible mixture and exhaust gas will enter the crankcase from the piston ring through the cylinder, and the exhaust gas pressure in the crankcase will increase. The engine oil will leak out from the crankshaft oil seal, the inner lining gasket of the crankcase, etc. The engine oil vapor in the atmosphere will pollute the atmosphere. The diesel engine breather is communicated with the crankcase. Through the function of the breather, it can ensure the pressure balance between the inside of the diesel engine and the outside world, effectively separate the oil and gas, the separated oil returns to the diesel engine crankcase, and the gas leads to the atmosphere, greatly reducing the pollution degree.

[0003] For the existing diesel engine breather, the core structure for oil and gas separation is mostly a wire mesh. Through the wire filter screen, the oil and gas are separated. For example, the patent number CN206617207U discloses a diesel engine breather, which includes a breather housing and a breather cover connected to the breather housing. The breather cover is provided with a breather cover vent, the lower end of the breather housing is provided with a breather vent, and the breather vent is connected to the mounting flange through a ventilation pipe; an upper partition and a lower partition are arranged in the breather housing at high and low positions, and partition vents are penetrated through the upper partition and the lower partition, and filter steel balls are filled between the upper partition and the lower partition.

[0004] The problem of using the wire filter screen for filtration is that the oil and gas passage is easily blocked by sludge, resulting in an increase in the crankcase pressure, thereby affecting the reliability of the diesel engine. Summary of the Utility Model

[0005] In view of the above problems, the utility model provides a diesel engine breather.

[0006] A diesel engine breather includes a housing, an intake pipe, an exhaust pipe and an oil outlet pipe. The intake pipe is installed on the top side of the housing, and the exhaust pipe and the oil outlet pipe are installed on the bottom side of the housing. The diesel engine breather further includes: an intake connection pipe installed inside the housing and communicated with the intake pipe, the middle diameter of the intake connection pipe is smaller than the diameters of both ends; an inner cylinder arranged between the intake connection pipe and the housing, with an open top end, evenly provided with liquid outlet holes on the bottom side, and a convex structure is arranged in the middle of the bottom side of the inner cylinder, the exhaust pipe extends into the housing and is located under the convex structure, and the housing, the inner cylinder and the intake connection pipe are coaxially arranged; partitions are evenly arranged between the intake connection pipe and the inner cylinder, and between the inner cylinder and the housing.

[0007] In a preferred embodiment, the diameters of both ends of the intake connection pipe are 1 / 4 - 1 / 3 of the middle diameter of the intake connection pipe.

[0008] In a preferred embodiment, the housing and the inner cylinder both have a cylindrical cross-section structure, and the bottom side of the housing is in a conical structure.

[0009] In a preferred embodiment, the inner cylinder is fixed in the housing by an inclined bracket.

[0010] In a preferred embodiment, the diesel engine breather further includes: a spiral tube disposed in the intake connection pipe.

[0011] In a preferred embodiment, the side wall of the intake connection pipe has a spiral raised channel.

[0012] In a preferred embodiment, through holes are equally spaced on the spiral raised channel.

[0013] In a preferred embodiment, a fixing seat is welded to the outer side wall of the housing.

[0014] 1. By providing a partition in the diesel engine breather of the present application, the oil and gas collide with the partition, so that the oil and gas are separated. The separated oil droplets flow out from the oil outlet pipe, and the gas flows out from the gas outlet pipe. Since the cross-section of the oil and gas passage formed by the partition is large and nearly S-shaped, it is not easy to cause sludge to block the passage, resulting in problems such as poor oil and gas circulation and increased crankcase pressure, ensuring the reliable operation of the diesel engine.

[0015] 2. By providing a spiral tube in the diesel engine breather of the present application, the mixed oil and gas entering the intake connection pipe generates a downward rotating airflow under the guiding action of the spiral blades of the spiral tube, and then generates a centrifugal force. The oil droplets mixed in the airflow are thrown towards the wall surface, flow downward under the action of gravity, flow into the bottom side of the housing through the liquid outlet holes, and finally are discharged from the oil outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Reading the following description of the exemplary embodiments with reference to the accompanying drawings, other characteristic features and advantages of the present invention will become clear. The drawings incorporated into the specification and forming a part of the specification illustrate embodiments of the present invention and are used together with the description to explain the principles of the present invention. In these drawings, like reference numerals are used to represent like elements. The following drawings in the description are some embodiments of the present invention, not all embodiments. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0017] Figure 1 Structural diagram of the diesel engine breather of the present invention;

[0018] Figure 2 Cross-sectional view of the diesel engine breather of the present invention;

[0019] Figure 3 Structural diagram of an embodiment of the diesel engine breather of the present invention;

[0020] Figure 4 Enlarged view of the position A of the diesel engine breather of the present utility model;

[0021] Figure 5 Enlarged view of the position B of the diesel engine breather of the present utility model.

[0022] In the figure: 10, housing; 11, intake pipe; 12, exhaust pipe; 13, oil outlet pipe; 20, intake connection pipe; 30, inner cylinder; 31, opening; 32, liquid outlet hole; 33, convex structure; 34, partition; 14, inclined bracket; 21, spiral pipe; 22, spiral convex channel; 23, through hole; 40, fixing seat. Specific embodiments

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments may be arbitrarily combined with each other.

[0024] The diesel engine breather will be described in detail below with reference to the accompanying drawings and embodiments. Embodiment

[0025] A diesel engine breather includes a housing 10, an intake pipe 11, an exhaust pipe 12 and an oil outlet pipe 13. The intake pipe 11 is installed on the top side of the housing 10, and the exhaust pipe 12 and the oil outlet pipe 13 are installed on the bottom side of the housing 10. The diesel engine breather further includes: an intake connection pipe 20, installed inside the housing 10 and communicating with the intake pipe 11, and the diameter of the middle part of the intake connection pipe 20 is smaller than that of both ends; an inner cylinder 30, arranged between the intake connection pipe 20 and the housing 10, with an opening 31 at the top end and liquid outlet holes 32 evenly arranged at the bottom side, and a convex structure 33 is arranged in the middle of the bottom side of the inner cylinder 30. The exhaust pipe 12 extends into the housing 10 and is located at the bottom side of the convex structure 33. The housing 10, the inner cylinder 30 and the intake connection pipe 20 are coaxially arranged; partitions 34 are evenly arranged between the intake connection pipe 20 and the inner cylinder 30, and between the inner cylinder 30 and the housing 10.

[0026] During operation, the mixed oil and gas enters the housing 10 from the intake pipe 11 and then flows into the intake connection pipe 20. Since the diameter of the middle part of the intake connection pipe 20 is smaller than that of both ends, a Venturi effect is formed, which can accelerate the flow rate of the oil and gas. The oil and gas flowing out of the intake connection pipe 20 passes through the nearly S-shaped oil and gas passage formed by the partition 34 and collides with the partition 34, thereby separating the oil and gas. The separated oil droplets flow out from the oil outlet pipe 13, and the gas flows out from the gas outlet pipe 12. Since the cross-section of the oil and gas passage formed by the partition 34 is large, it is not easy to cause the oil sludge to block the passage, resulting in poor oil and gas circulation and increased crankcase pressure, thus ensuring the reliable operation of the diesel engine.

[0027] Among them, the diameters of both ends of the intake connection pipe 20 are 1 / 4 - 1 / 3 of the diameter of the middle part of the intake connection pipe 20, and both the intake end and the outlet end of the intake connection pipe 20 are conical pipes.

[0028] Among them, both the housing 10 and the inner cylinder 30 have a cylindrical cross-sectional structure, and the bottom side of the housing 10 is in a conical structure, which is convenient for collecting the accumulated liquid oil and finally discharging it from the oil outlet pipe 13.

[0029] Among them, the inner cylinder 30 is fixed in the housing 10 through the inclined bracket 14. Among them, a fixed seat 40 is welded to the outer side wall of the housing 10. Embodiment

[0030] Embodiment 2 is an improvement over Embodiment 1, and the improvements include: The diesel engine breather further includes: a spiral pipe 21, which is arranged in the intake connection pipe 20.

[0031] By arranging the spiral pipe 21, the mixed oil and gas entering the intake connection pipe 20 generates a downward rotating air flow under the guiding action of the spiral blades of the spiral pipe 21, and then generates a centrifugal force. The oil droplets mixed in the air flow are thrown towards the wall surface, flow downward under the action of gravity, and flow into the bottom side of the housing 10 through the liquid outlet hole 32, and finally flow out from the oil outlet pipe 13.

[0032] Among them, the spiral pipe 21 includes a hollow pipe body and spiral blades on the outside of the hollow pipe body.

[0033] Among them, the spiral pipe 21 is fixed in the intake connection pipe 20 through a tripod.

[0034] Among them, since the intake connection pipe 20 is a Venturi tube with a large diameter on both sides and a small diameter in the middle, the internal flow rate is fast, and it is not easy for the intake connection pipe 20 to stay in the intake connection pipe 20, avoiding blocking the oil and gas passage by oil sludge. Embodiment

[0035] Embodiment 3 is an improvement over Embodiment 1, and the improvements include: The side wall of the intake connection pipe 20 has a spiral raised channel 22.

[0036] Among them, the spiral convex channel 22 is arranged on the side wall of the intake connection pipe 20 corresponding to the space between two adjacent spiral vanes. When the mixed oil and gas generates a downward rotating air flow under the guiding action of the spiral vanes of the spiral pipe 21, the oil droplets thrown towards the side wall of the intake connection pipe 20 will enter the spiral convex channel 22 and flow downward along the spiral convex channel 22, thereby providing a dedicated flow channel for the oil droplets and preventing the oil droplets from affecting the flow of the oil and gas in the intake connection pipe 20. Embodiment

[0037] Embodiment 4 is an improvement on Embodiment 3, and the improvements include: through holes 23 are equally spaced on the spiral convex channel 22.

[0038] Among them, by providing the through holes 23, the oil droplets in the spiral convex channel 22 can flow out of the intake connection pipe 20 along the through holes 23 and then enter the inner cylinder 30, thereby increasing the storage capacity of the spiral convex channel 22. Embodiment

[0039] Embodiment 5 is an improvement on Embodiment 1, and the improvements include: filter wire layers can be attached to both sides of the partition plate 34, and the distance between two adjacent filter wire layers is 3 - 6 times the thickness of the two filter wire layers, which can improve the oil and gas separation ability while preventing the oil and gas passage from being blocked.

[0040] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or further includes elements inherent to such article or device. Without more limitations, the elements defined by the statement "including..." do not exclude the existence of additional identical elements in the article or device including the elements.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. The present invention has been described in detail only with reference to the preferred embodiments. Those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and all should be covered within the scope of the claims of the present invention.

Claims

1. A diesel engine respirator, comprising a housing (10), an air inlet pipe (11), an air outlet pipe (12) and an oil outlet pipe (13), characterized in that: The air inlet pipe (11) is installed on the top side of the housing (10), the air outlet pipe (12) and the oil outlet pipe (13) are installed on the bottom side of the housing (10), and the diesel engine respirator further comprises: An air intake connecting pipe (20) is installed inside the housing (10) and is in communication with the air intake pipe (11); the diameter of the middle portion of the air intake connecting pipe (20) is smaller than the diameters of the two ends; The inner cylinder (30) is arranged between the air intake connecting pipe (20) and the shell (10), has an opening (31) at the top end, and has liquid outlet holes (32) evenly arranged at the bottom side. A protruding structure (33) is arranged in the middle of the bottom side of the inner cylinder (30). The air outlet pipe (12) extends into the shell (10) and is located at the bottom side of the protruding structure (33). The shell (10), the inner cylinder (30), and the air intake connecting pipe (20) are coaxially arranged. A partition (34) is evenly arranged between the air intake connecting pipe (20) and the inner tube (30), and between the inner tube (30) and the shell (10); The inner cylinder (30) is fixed in the housing (10) via an oblique bracket (14); The side wall of the air intake connecting pipe (20) is provided with a spiral protrusion channel (22); The spiral protrusion channel (22) is provided with through holes (23) at equal intervals.

2. The diesel engine respirator according to claim 1, characterized in that: The diameters at both ends of the air intake connecting pipe (20) are 1 / 4 to 1 / 3 of the diameter of the middle portion of the air intake connecting pipe (20).

3. The diesel engine respirator according to claim 1, characterized in that: The shell (10) and the inner cylinder (30) both have a cylindrical structure in cross section, and the bottom side of the shell (10) has a conical structure.

4. The diesel engine respirator according to claim 1, characterized in that: The inner cylinder (30) is fixed in the shell (10) via an oblique bracket (14).

5. The diesel engine respirator according to claim 1, characterized in that: The diesel engine respirator also includes: A spiral tube (21) is arranged in the air intake connecting tube (20).

6. The diesel engine respirator according to claim 1, characterized in that: A fixing seat (40) is welded to the outer side wall of the shell (10).

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