Oil-gas separation mechanism and engine

Abstract

The utility model discloses an oil-gas separation mechanism and an engine, the oil-gas separation mechanism comprises an air inlet cam shaft, a chain wheel, a centrifugal separation disc and a breather pipe, and the air inlet cam shaft is provided with a first channel penetrating through the two ends of the air inlet cam shaft; the chain wheel is meshed with a timing chain of an engine and used for driving the air inlet cam shaft to rotate. The centrifugal separation disc is connected with one end of the air inlet cam shaft and provided with a separation cavity, the separation cavity communicates with the first channel, fan blades are arranged in the separation cavity, the centrifugal separation disc rotates to suck mixed oil gas into the separation cavity, and the fan blades guide gas into the first channel and throw engine oil out of the separation cavity. The breather pipe communicates with the end, away from the centrifugal separation disc, of the first channel and is used for exhausting gas in the first channel. According to the oil-gas separation mechanism, the oil-gas separation structure can be arranged on the air inlet cam shaft, the space occupied by the oil-gas separation structure in an engine is reduced, the internal structure of the engine is simplified, and the manufacturing difficulty and manufacturing cost of the engine are reduced.

Description

An oil-gas separation mechanism and engine Technical Field

[0001] This utility model relates to the technical field of engine structure, and in particular to an oil-gas separation mechanism and an engine. Background Technology

[0002] During engine operation, some combustible mixtures containing engine oil and exhaust gases pass through the piston rings into the crankcase, increasing crankcase pressure and causing problems such as crankcase seal failure, oil leakage, and component corrosion, threatening the stability of the engine system.

[0003] In order to extract the oil-air mixture from the crankcase, existing engines are generally equipped with a dedicated oil-air separator. The oil-air separator extracts the mixed oil and air from the crankcase and separates the oil and air. The combustible gas after separation is re-entered into the cylinder for combustion or is discharged, while the separated oil returns to the oil pan for reuse.

[0004] However, the existing method of placing a dedicated oil-gas separator inside the engine will cause the oil-gas separator to occupy too much space inside the engine, resulting in a more complex internal engine structure and increasing the difficulty and cost of engine manufacturing. Summary of the Invention

[0005] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes an oil-gas separation mechanism that can be arranged on the intake camshaft, reducing the space occupied by the oil-gas separation structure inside the engine, simplifying the internal structure of the engine, and reducing the manufacturing difficulty and cost of the engine.

[0006] This utility model also proposes an engine having the above-mentioned oil-gas separation mechanism.

[0007] An oil-gas separation mechanism according to a first aspect embodiment of the present invention includes:

[0008] An intake camshaft having a first channel passing through both ends of the intake camshaft;

[0009] The sprocket meshes with the engine's timing chain and is used to drive the intake camshaft to rotate;

[0010] A centrifugal separator disc is connected to one end of the intake camshaft and has a separation chamber. The separation chamber is connected to the first channel. A fan blade is provided inside the separation chamber. The centrifugal separator disc rotates to draw in the mixed oil and gas into the separation chamber. The fan blade guides the gas into the first channel and throws the oil out of the separation chamber.

[0011] A vent pipe is connected to the end of the first channel away from the centrifugal separator plate, and is used to discharge the gas in the first channel.

[0012] An oil-gas separation mechanism according to an embodiment of the present utility model has at least the following beneficial effects:

[0013] 1. This utility model integrates the oil-gas separation function into the first channel and centrifugal separator inside the intake camshaft, eliminating the need for an additional independent oil-gas separator, thus significantly saving internal engine space, simplifying the internal structure of the engine, and reducing the manufacturing difficulty and cost of the engine.

[0014] 2. This utility model utilizes the rotational power of the intake camshaft itself to drive the centrifugal separation disc, thereby making full use of the rotational power of the intake camshaft to achieve low-energy oil-gas separation.

[0015] 3. This utility model, by setting fan blades inside the separation chamber, can generate suction when the centrifugal separation disc rotates, drawing the mixed oil and gas outside the separation chamber into the separation chamber. During the process of the mixed oil and gas passing through the fan blades, the viscous and heavy oil will adhere to the fan blades and be thrown out of the separation chamber by the centrifugal force as the fan blades rotate. The light gas will be drawn by the fan blades through the separation chamber into the first channel. Thus, the fan blades and the centrifugal separation disc work together to achieve dynamic gas-liquid separation, ensuring high separation efficiency.

[0016] 4. This utility model connects the vent pipe to the end of the first channel away from the centrifugal separator, thereby allowing the gas in the first channel to re-enter the cylinder for combustion or be discharged from the engine through the vent pipe.

[0017] According to some embodiments of the present invention, the centrifugal separator is coaxially connected to the intake camshaft, and the fan blades are disposed on the radially outer side of the intake camshaft.

[0018] The advantages are: by connecting the centrifugal separator disc coaxially with the intake camshaft and setting the fan blades on the radially outer side of the intake camshaft, it can be understood that, on the one hand, the coaxial connection between the centrifugal separator disc and the intake camshaft ensures smooth power transmission and reduces the risk of seal failure caused by vibration; on the other hand, the radial arrangement of the fan blades can maximize the use of the centrifugal force field and improve the oil-gas separation efficiency.

[0019] According to some embodiments of the present invention, the number of fan blades is set to multiple, and the multiple fan blades are arranged circumferentially along the intake camshaft.

[0020] The advantages are: by setting the number of fan blades to multiple, and arranging the multiple fan blades around the circumference of the intake camshaft, it can be understood that the multiple fan blades are evenly distributed around the circumference to form a continuous separation surface, which enhances the airflow disturbance effect, improves the aggregation effect of tiny oil mist particles, and effectively improves the oil separation efficiency.

[0021] According to some embodiments of the present invention, the fan blades extend in an arc shape along a direction away from the rotation axis of the centrifugal separation disc.

[0022] The advantages are: by extending the fan blades in an arc shape away from the rotation axis of the centrifugal separation disc, the present invention optimizes the airflow trajectory, reduces flow resistance loss, and at the same time prolongs the residence time of oil droplets on the fan blades, thereby improving the thoroughness of separation.

[0023] According to some embodiments of the present invention, the concave arc surface of the fan blade has a hook portion that protrudes in a direction away from the rotation axis of the centrifugal separation disc.

[0024] The advantage of this invention is that by providing a hook portion that protrudes along the rotation axis away from the centrifugal separation disc on the concave arc surface of the fan blade, it can be understood that the hook portion structure forms a local low-pressure zone, thereby enhancing the oil droplet capture capability of the fan blade.

[0025] According to some embodiments of the present invention, the centrifugal separation disc includes a disc body and a cover body that are detachably connected, and the separation cavity is formed between the disc body and the cover body. One end of the intake camshaft passes through the disc body so that the first channel communicates with the separation cavity.

[0026] The advantages of this invention are: by making the centrifugal separation disc include a detachably connected disc body and a cover body, forming a separation chamber between the disc body and the cover body, and by having one end of the intake camshaft pass through the disc body to make the first channel connect to the separation chamber, it can be understood that the separate structure design of the disc body and the cover body facilitates cleaning of the separation chamber and extends the service life of the centrifugal separation disc.

[0027] According to some embodiments of the present invention, the fan blades are fixed on the disc body.

[0028] The advantage of this invention is that by fixing the fan blades to the disc body, the dynamic balance accuracy can be ensured and high-speed rotation vibration can be reduced.

[0029] According to some embodiments of the present invention, the centrifugal separation disc is connected to the sprocket.

[0030] The advantages of this invention are: by connecting the centrifugal separation disc to the sprocket, the sprocket and the centrifugal separation disc work together to minimize the power transmission path and improve energy utilization. At the same time, the synchronous transmission of the sprocket and the centrifugal separation disc ensures that the separation speed is precisely matched with the engine operating conditions.

[0031] According to some embodiments of the present invention, the oil-gas separation mechanism further includes a connecting seat, which is disposed between the intake camshaft and the vent pipe. The connecting seat has a first through hole penetrating both ends of the connecting seat. The end of the intake camshaft away from the centrifugal separation disc is connected to one end of the first through hole, and the vent pipe is connected to the other end of the first through hole.

[0032] The advantage of this invention is that by setting a connecting seat between the intake camshaft and the vent pipe, the connecting seat has a first through hole penetrating both ends of the connecting seat. The end of the intake camshaft away from the centrifugal separator is connected to one end of the first through hole, and the vent pipe is connected to the other end of the first through hole. Thus, the intake camshaft and the vent pipe are connected by the connecting seat, so that the intake camshaft can rotate relative to the connecting seat, avoiding interference of the intake camshaft rotation with the vent pipe.

[0033] According to some embodiments of the present invention, a first oil seal is fitted at the end of the intake camshaft away from the centrifugal separator, and a second oil seal is fitted at one end of the vent pipe. The first oil seal and the second oil seal respectively abut against and seal the inner circular surfaces of both ends of the first through hole.

[0034] The advantage of this invention is that by fitting a first oil seal at one end of the intake camshaft away from the centrifugal separator and a second oil seal at one end of the vent pipe, the first and second oil seals respectively abut against and seal the inner surfaces of both ends of the first through hole, thereby preventing oil and gas leakage at both ends of the first through hole.

[0035] According to some embodiments of the present invention, the first through hole includes a first section, a second section, and a third section arranged sequentially along the axial direction of the first through hole. The first section and the third section are respectively used to install the first oil seal and the second oil seal. The inner diameter of the second section is larger than the outer diameter of the end of the intake camshaft inserted into the first through hole and the outer diameter of the end of the vent pipe inserted into the first through hole. There is a gap between the end of the intake camshaft and the end of the vent pipe. The third section forms an oil storage ring groove.

[0036] The advantages of this invention are as follows: The first through hole comprises a first section, a second section, and a third section arranged sequentially along the axial direction of the first through hole. The first and third sections are used to install the first oil seal and the second oil seal, respectively. The inner diameter of the second section is larger than the outer diameter of the end of the intake camshaft inserted into the first through hole and the outer diameter of the end of the vent pipe inserted into the first through hole. There is a gap between the end of the intake camshaft and the end of the vent pipe. The third section forms an oil reservoir groove. It can be understood that the gap between the end of the intake camshaft and the end of the vent pipe allows insufficiently separated oil to move along the inner wall of the first through hole to the end of the first through hole away from the centrifugal separator, and then enter the oil reservoir groove through the gap between the intake camshaft and the vent pipe. On the one hand, this prevents oil from entering the vent pipe; on the other hand, the oil in the oil reservoir groove can lubricate the first through hole and the intake camshaft, thereby reducing the resistance encountered when the intake camshaft rotates and making the rotation of the intake camshaft smoother.

[0037] An engine according to a second aspect of the present invention includes an oil-gas separation mechanism as described in the first aspect of the present invention.

[0038] An engine according to an embodiment of the present invention has at least the following beneficial effects:

[0039] 1. This utility model integrates the oil-gas separation function into the first channel and centrifugal separation disc inside the intake camshaft by integrating the oil-gas separation mechanism, eliminating the need for an additional independent oil-gas separator, thus significantly saving internal engine space, simplifying the internal structure of the engine, and reducing the manufacturing difficulty and cost of the engine.

[0040] 2. This utility model utilizes the rotational power of the intake camshaft itself to drive the centrifugal separation disc in the oil-gas separation mechanism, thereby making full use of the rotational power of the intake camshaft to achieve low-energy oil-gas separation.

[0041] 3. This utility model, by setting fan blades inside the separation chamber, can generate suction when the centrifugal separation disc rotates, drawing the mixed oil and gas outside the separation chamber into the separation chamber. During the process of the mixed oil and gas passing through the fan blades, the viscous and heavy oil will adhere to the fan blades and be thrown out of the separation chamber by the centrifugal force as the fan blades rotate. The light gas will be drawn by the fan blades through the separation chamber into the first channel. Thus, the fan blades and the centrifugal separation disc work together to achieve dynamic gas-liquid separation, ensuring high separation efficiency.

[0042] 4. This utility model provides an oil-gas separation mechanism with a vent pipe connected to the end of the first channel away from the centrifugal separation disc, thereby allowing the gas in the first channel to re-enter the cylinder for combustion or be discharged from the engine through the vent pipe.

[0043] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0044] To more clearly illustrate the technical solutions of the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0045] Figure 1 is a schematic diagram of an oil-gas separation mechanism according to an embodiment of the present invention;

[0046] Figure 2 is an exploded view of the part shown in Figure 1;

[0047] Figure 3 is the front view shown in Figure 1;

[0048] Figure 4 is a cross-sectional view of AA shown in Figure 3;

[0049] Figure 5 is a schematic diagram of the structure of the disk shown in Figure 1.

[0050] Reference numerals: 100-Intake camshaft, 110-First channel, 120-Sprocket, 130-Centrifugal separator disc, 140-Separation chamber, 150-Fan blade, 160-Ventilation pipe, 170-Hook, 180-Disc body, 190-Cover body, 200-Connecting seat, 210-First through hole, 220-First oil seal, 230-Second oil seal, 240-First section, 250-Second section, 260-Third section. Detailed Implementation

[0051] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0052] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0053] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" and "second" are mentioned, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of the indicated technical features.

[0054] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation, connection, and linkage" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0055] An oil-gas separation mechanism and engine according to an embodiment of the present invention are described below with reference to Figures 1-5.

[0056] The present invention aims to provide an embodiment of an oil-gas separation mechanism and an engine.

[0057] In this embodiment, an engine mainly includes an oil-gas separation mechanism.

[0058] Referring to Figures 1, 2, 3 and 4, the oil-gas separation mechanism includes an intake camshaft 100, a sprocket 120, a centrifugal separation disc 130 and a vent pipe 160.

[0059] The intake camshaft 100 is used to control the opening and closing of the engine intake valves, and the intake camshaft 100 has a first channel 110 that runs through both ends of the intake camshaft 100.

[0060] For sprocket 120, sprocket 120 meshes with the timing chain of the engine and is used to drive the intake camshaft 100 to rotate.

[0061] Specifically, the sprocket 120 is mounted on the intake camshaft 100, and a first nut is provided at one end of the intake camshaft 100. The first nut is used to lock the sprocket 120, thereby facilitating the fixing of the sprocket 120 and the intake camshaft 100.

[0062] The centrifugal separator 130 is connected to one end of the intake camshaft 100. The centrifugal separator 130 has a separation chamber 140, which is connected to the first channel 110. A fan blade 150 is provided in the separation chamber 140. The centrifugal separator 130 rotates to draw the mixed oil and gas into the separation chamber 140. The fan blade 150 guides the gas into the first channel 110 and throws the oil out of the separation chamber 140.

[0063] This embodiment integrates the oil-gas separation function into the first channel 110 and centrifugal separator 130 inside the intake camshaft 100, eliminating the need for an additional independent oil-gas separator, thus significantly saving internal engine space, simplifying the internal structure of the engine, and reducing the manufacturing difficulty and cost of the engine.

[0064] This embodiment utilizes the rotational power of the intake camshaft 100 to drive the centrifugal separation disk 130, thereby making full use of the rotational power of the intake camshaft 100 to achieve low-energy oil-gas separation.

[0065] In this embodiment, a fan blade 150 is installed inside the separation chamber 140. When the centrifugal separation disk 130 rotates, the fan blade 150 can generate suction to draw the mixed oil and gas outside the separation chamber 140 into the separation chamber 140. During the process of the mixed oil and gas passing through the fan blade 150, the viscous and heavy oil will adhere to the fan blade 150 and be thrown out of the separation chamber 140 by the centrifugal force as the fan blade 150 rotates. The light gas will be drawn by the fan blade 150 through the separation chamber 140 and enter the first channel 110. Thus, the fan blade 150 and the centrifugal separation disk 130 work together to achieve dynamic gas-liquid separation, ensuring high separation efficiency.

[0066] In some specific embodiments, the centrifugal separator 130 is coaxially connected to the intake camshaft 100, and the fan blades 150 are arranged on the radially outer side of the intake camshaft 100.

[0067] Understandably, on the one hand, the coaxial connection between the centrifugal separator 130 and the intake camshaft 100 ensures smooth power transmission and reduces the risk of seal failure caused by vibration. On the other hand, the radial arrangement of the fan blades 150 can maximize the use of the centrifugal force field and improve the oil-gas separation efficiency.

[0068] Furthermore, the number of fan blades 150 is set to multiple, and the multiple fan blades 150 are arranged circumferentially along the intake camshaft 100.

[0069] Understandably, the multi-blade 150° circumferential distribution forms a continuous separation surface, enhancing the airflow disturbance effect, improving the aggregation effect of tiny oil mist particles, and effectively improving the oil separation efficiency.

[0070] In some specific embodiments, the fan blade 150 extends in an arc shape along the rotation axis away from the centrifugal separation disk 130.

[0071] Understandably, the arc-shaped extension of the fan blade 150 optimizes the airflow trajectory, reduces flow resistance loss, and at the same time, prolongs the residence time of oil droplets on the fan blade 150, thereby improving the thoroughness of separation.

[0072] Furthermore, the concave arc surface of the fan blade 150 has a hook portion 170 that protrudes in a direction away from the rotation axis of the centrifugal separation disk 130.

[0073] Understandably, the hook 170 structure creates a local low-pressure zone, enhancing the oil droplet capture capability of the fan blade 150.

[0074] In some specific embodiments, the centrifugal separator 130 includes a detachably connected disc body 180 and a cover 190, with a separation chamber 140 formed between the disc body 180 and the cover 190. One end of the intake camshaft 100 passes through the disc body 180 so that the first channel 110 communicates with the separation chamber 140.

[0075] Understandably, the separate structure design of the disc body 180 and the cover body 190 facilitates cleaning of the separation chamber 140 and extends the service life of the centrifugal separation disc 130.

[0076] Referring to Figure 5, the fan blade 150 is further fixed on the disk body 180, thereby the disk body 180 fixing the fan blade 150 can ensure dynamic balance accuracy and reduce high-speed rotational vibration.

[0077] In some specific embodiments, the centrifugal separation disc 130 is connected to the sprocket 120, thereby achieving the shortest power transmission path and improving energy utilization through the linkage between the sprocket 120 and the centrifugal separation disc 130. At the same time, the synchronous transmission between the sprocket 120 and the centrifugal separation disc 130 ensures that the separation speed is precisely matched with the engine operating conditions.

[0078] Specifically, the centrifugal separation disc 130 is provided with a mounting through hole, and a first bolt is provided on the mounting through hole. The first bolt is threadedly connected to the sprocket 120 to fix the centrifugal separation disc 130 and the sprocket 120.

[0079] In some specific embodiments, one side of the centrifugal separation disc 130 is provided with a first mounting hole for accommodating one end of the intake camshaft 100 to extend into the separation chamber 140. The sprocket 120 is provided with a first protrusion, and the inner side of the first mounting hole is provided with a first recess. The first protrusion and the first recess cooperate to position the centrifugal separation disc 130 and the sprocket 120, thereby making the installation position of the centrifugal separation disc 130 and the sprocket 120 more accurate.

[0080] Vent pipe 160 is connected to the end of first channel 110 away from centrifugal separation disk 130, and vent pipe 160 is used to discharge gas in first channel 110.

[0081] In this embodiment, by connecting the vent pipe 160 to the end of the first channel 110 away from the centrifugal separator 130, the gas in the first channel 110 can be re-entered into the cylinder for combustion or expelled from the engine through the vent pipe 160.

[0082] In some specific embodiments, the oil-gas separation mechanism further includes a connecting seat 200, which is disposed between the intake camshaft 100 and the vent pipe 160. The connecting seat 200 has a first through hole 210 passing through both ends of the connecting seat 200. One end of the intake camshaft 100 away from the centrifugal separation disc 130 is connected to one end of the first through hole 210, and the vent pipe 160 is connected to the other end of the first through hole 210. Thus, the intake camshaft 100 and the vent pipe 160 are connected by the connecting seat 200, so that the intake camshaft 100 can rotate relative to the connecting seat 200, avoiding the rotation of the intake camshaft 100 from interfering with the vent pipe 160.

[0083] Furthermore, a first oil seal 220 is fitted at the end of the intake camshaft 100 away from the centrifugal separator 130, and a second oil seal 230 is fitted at the end of the vent pipe 160. The first oil seal 220 and the second oil seal 230 respectively abut against the inner circular surfaces of the two ends of the first through hole 210 to seal, thereby preventing oil and gas leakage at both ends of the first through hole 210.

[0084] Specifically, the first through hole 210 includes a first section 240, a second section 250 and a third section 260 arranged sequentially along the axial direction of the first through hole 210. The first section 240 and the third section 260 are used to install the first oil seal 220 and the second oil seal 230, respectively. The inner diameter of the second section 250 is larger than the outer diameter of the end of the intake camshaft 100 inserted into the first through hole 210 and the outer diameter of the end of the vent pipe 160 inserted into the first through hole 210. There is a gap between the end of the intake camshaft 100 and the end of the vent pipe 160. The third section 260 forms an oil storage ring groove.

[0085] Understandably, there is a gap between the end of the intake camshaft 100 and the end of the vent pipe 160, allowing insufficiently separated oil to move along the inner wall of the first through hole 210 to the end of the first through hole 210 away from the centrifugal separator 130, and then enter the oil reservoir groove through the gap between the intake camshaft 100 and the vent pipe 160. On the one hand, this prevents oil from entering the vent pipe 160, and on the other hand, the oil in the oil reservoir groove can lubricate the first through hole 210 and the intake camshaft 100, thereby reducing the resistance encountered when the intake camshaft 100 rotates, making the rotation of the intake camshaft 100 smoother.

[0086] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0087] The terms "first," "second," "third," "fourth," etc. (if applicable) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments described herein can be implemented in a sequence other than that illustrated or described herein.

[0088] It should also be noted that, in the description of this specification, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations.

[0089] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may also include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or apparatus.

[0090] Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0091] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. An oil-gas separation mechanism, characterized in that, include: The intake camshaft (100) has a first channel (110) passing through both ends of the intake camshaft (100); the sprocket (120) meshes with the timing chain of the engine and is used to drive the intake camshaft (100) to rotate; A centrifugal separator (130) is connected to one end of the intake camshaft (100) and has a separation chamber (140) connected to the first channel (110). A fan blade (150) is provided in the separation chamber (140). The centrifugal separator (130) rotates to draw mixed oil and gas into the separation chamber (140). The fan blade (150) guides the gas into the first channel (110) and throws the oil out of the separation chamber (140). A vent pipe (160) is connected to the end of the first channel (110) away from the centrifugal separator (130) and is used to discharge the gas in the first channel (110).

2. The oil-gas separation mechanism according to claim 1, characterized in that, The centrifugal separator (130) is coaxially connected to the intake camshaft (100), and the fan blade (150) is located on the radial outer side of the intake camshaft (100).

3. The oil-gas separation mechanism according to claim 2, characterized in that, The number of fan blades (150) is provided in multiples, and the multiple fan blades (150) are arranged circumferentially along the intake camshaft (100).

4. The oil-gas separation mechanism according to claim 1, characterized in that, The fan blade (150) extends in an arc shape along the rotation axis away from the centrifugal separation disk (130).

5. The oil-gas separation mechanism according to claim 4, characterized in that, The concave surface of the fan blade (150) has a hook (170) that protrudes in a direction away from the rotation axis of the centrifugal separator (130).

6. The oil-gas separation mechanism according to claim 1, characterized in that, The centrifugal separator (130) includes a detachably connected disc body (180) and a cover (190), and the separation chamber (140) is formed between the disc body (180) and the cover (190). One end of the intake camshaft (100) passes through the disc body (180) so that the first channel (110) communicates with the separation chamber (140).

7. The oil-gas separation mechanism according to claim 1, characterized in that, It also includes a connecting seat (200), which is disposed between the intake camshaft (100) and the vent pipe (160). The connecting seat (200) has a first through hole (210) penetrating both ends of the connecting seat (200). The end of the intake camshaft (100) away from the centrifugal separator (130) is connected to one end of the first through hole (210), and the vent pipe (160) is connected to the other end of the first through hole (210).

8. The oil-gas separation mechanism according to claim 7, characterized in that, The intake camshaft (100) is fitted with a first oil seal (220) at one end away from the centrifugal separator (130), and a second oil seal (230) is fitted at one end of the vent pipe (160). The first oil seal (220) and the second oil seal (230) respectively abut against the inner circular surfaces of the two ends of the first through hole (210) for sealing.

9. An oil-gas separation mechanism according to claim 8, characterized in that, The first through hole (210) includes a first section (240), a second section (250) and a third section (260) arranged sequentially along the axial direction of the first through hole (210). The first section (240) and the third section (260) are used to install the first oil seal (220) and the second oil seal (230) respectively. The inner diameter of the second section (250) is larger than the outer diameter of the end of the intake camshaft (100) inserted into the first through hole (210) and the outer diameter of the end of the vent pipe (160) inserted into the first through hole (210). There is a gap between the end of the intake camshaft (100) and the end of the vent pipe (160). The third section (260) forms an oil storage ring groove.

10. An engine, characterized in that, The invention includes an oil-gas separation mechanism as described in any one of claims 1 to 9.

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