A diesel engine side cover plate with an oil and gas separation function

Abstract

The present invention discloses a diesel engine side cover plate with an oil-gas separation function, belonging to the technical field of engine oil-gas separation. It solves the technical problems of limited layout space of the existing engine vehicle and the oil leakage fault of the engine oil-gas separation device during operation. The side cover plate includes a side cover plate body, and a partition plate is provided on the inner wall of the side cover plate body to divide its inner cavity into a labyrinth cavity and a gear chamber communication cavity. The present invention can install the side cover plate after integrated oil-gas separation on the model on the side of the cylinder head assembly, which can separate oil and gas, is beneficial to the overall layout of the engine, reduces costs, and avoids oil leakage faults.

Description

Technical Field

[0001] The present invention relates to the technical field of engine oil and gas separation, and more specifically, it relates to a diesel engine side cover plate with an oil and gas separation function. Background Art

[0002] The engine oil and gas separation device is commonly known as a breather, which is usually arranged on the cylinder head cover. In order to ensure good separation effect, a square cavity is usually protruded on the cylinder head cover for arranging the breather labyrinth plate, so that the oil and gas have sufficient space and time to achieve separation. Refer to Figure 1 , in the prior art solution, in order to arrange the labyrinth plate of the breather, a special labyrinth chamber Ⅰ needs to be designed on the cylinder head cover, which increases the manufacturing difficulty and cost of the cylinder head cover; in order to arrange the engine breather, the designed labyrinth chamber Ⅰ increases the height of the cylinder head cover, thus resulting in limited layout space of the engine in the whole vehicle; since the inside of the cylinder head cover is a rocker mechanism, during its operation, the engine oil will be thrown into the labyrinth cavity of the breather, causing the breather oil leakage fault. Summary of the Invention

[0003] The technical problem to be solved by the present invention is in view of the above deficiencies of the prior art. The purpose of the present invention is to provide a diesel engine side cover plate with an oil and gas separation function that can separate oil and gas and is beneficial to the overall layout of the engine.

[0004] The technical solution of the present invention is: a diesel engine side cover plate with an oil and gas separation function, including a side cover plate body. A partition plate is provided on the inner wall of the side cover plate body to divide its inner cavity into a labyrinth cavity and a gear chamber communication cavity, and a labyrinth cover plate covering the labyrinth cavity. The upper end of the partition plate is connected to the top wall of the side cover plate body. An air outlet is provided in the labyrinth cavity on one side of the upper end of the partition plate. A first guide plate is provided in the labyrinth cavity along the extension direction of the partition plate. The lower end of the first guide plate is connected to the side wall of the side cover plate body. A second guide plate extending downward is provided on the partition plate at the bottom of the air outlet. The first guide plate is located between the second guide plate and the partition plate. The gap between the first guide plate and the partition plate forms a first air passage. The lower end of the first air passage is an air inlet. The gap between the second guide plate and the first guide plate forms a second air passage. The gap between the second guide plate and the side wall of the side cover plate body forms a third air passage. The first air passage, the second air passage, and the third air passage are connected in sequence to form a labyrinth. One end of the third air passage is connected to the air outlet. A first oil blocking mechanism is provided in the first air passage, and a second oil blocking mechanism is provided in the second air passage.

[0005] As a further improvement, the labyrinth cavity is arranged at the upper left position of the side cover plate body.

[0006] Further, the first oil baffle mechanism includes a first baffle and a third baffle that are arranged at intervals above and below the partition plate, and a second baffle that is arranged on the first guide plate. The second baffle is located between the first baffle and the third baffle. The first baffle, the second baffle, and the third baffle all extend obliquely downward.

[0007] Further, the second oil baffle mechanism includes a fourth baffle arranged at the top of the first guide plate and a fifth baffle of the first guide plate arranged below the second guide plate. The fourth baffle extends horizontally toward the second guide plate, and the fifth baffle extends obliquely upward.

[0008] Further, the second guide plate is parallel to the side wall of the side cover body.

[0009] Further, the second guide plate is an arc-shaped plate structure bent toward the first guide plate.

[0010] Further, the partition plate, the first guide plate, and the second guide plate have the same height.

[0011] Further, the gap between the first baffle and the first guide plate is 8 - 12 mm, the gap between the second baffle and the partition plate is 8 - 12 mm, and the gap between the fourth baffle and the second guide plate is 8 - 12 mm.

[0012] Further, connection lugs are provided on the partition plate, the first guide plate, and the side wall of the side cover body. The connection lugs are provided with screw holes, and the labyrinth cover is locked to the screw holes of the connection lugs by bolts.

[0013] Further, the partition plate, the first guide plate, the second guide plate, and the side cover body are of an integrally formed structure.

[0014] Advantageous Effects

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] In the engine layout with an overhead camshaft, the present invention can well solve the problem of the overall engine height being tight. The side cover integrates the function of the labyrinth of the oil and gas separation mechanism, directly reducing the height of the cylinder head cover. The labyrinth baffle on the side cover is directly cast, without changing the appearance of the side cover due to the layout of the labyrinth, and there is no need to additionally add parts such as a breather labyrinth baffle, reducing the number of parts and the cost of the engine. Since the labyrinth is arranged inside the side cover, it avoids the breather oil leakage failure caused by the oil splash generated by the movement of the rocker arm entering the labyrinth when arranged in the cylinder head cover. Description of the Drawings

[0017] Figure 1 It is a schematic diagram of the existing cylinder head cover structure;

[0018] Figure 2 It is a view of the labyrinth structure of the present invention;

[0019] Figure 3 It is the maze oil and gas flow view of the present invention;

[0020] Figure 4 It is the front view after the assembly of the present invention;

[0021] Figure 5 It is the front view of the present invention;

[0022] Figure 6 It is the side view of the present invention;

[0023] Figure 7 It is the assembly view of the present invention on the engine.

[0024] Wherein: 1-side cover plate body, 2-maze cover plate, 3-bolt, 4-maze cavity, 5-air inlet, 6-air outlet, 7-connecting lug, 8-gear chamber communication cavity, 11-separator plate, 12-first guide plate, 13-second guide plate, 21-first baffle plate, 22-second baffle plate, 23-third baffle plate, 24-fourth baffle plate, 25-fifth baffle plate, 41-first air passage, 42-second air passage, 43-third air passage, 111-side cover plate assembly, 112-cylinder head assembly. Specific embodiments

[0025] The present invention will be further described below with reference to specific embodiments in the drawings.

[0026] Refer to Figures 2 to 7 , a diesel engine side cover plate with oil and gas separation function, including a side cover plate body 1, an inner wall of the side cover plate body 1 is provided with a separator plate 11 that divides its inner cavity into a maze cavity 4 and a gear chamber communication cavity 8, and a maze cover plate 2 that covers the maze cavity 4. The gear chamber communication cavity 8 communicates with the gear chamber. The upper end of the separator plate 11 is connected to the top wall of the side cover plate body 1. An air outlet 6 is provided in the maze cavity 4 on one side of the upper end of the separator plate 11. A first guide plate 12 is provided in the maze cavity 4 along the extension direction of the separator plate 11. The lower end of the first guide plate 12 is connected to the side wall of the side cover plate body 1. The separator plate 11 at the bottom of the air outlet 6 is provided with a second guide plate 13 extending downward. The first guide plate 12 is located between the second guide plate 13 and the separator plate 11. The gap between the first guide plate 12 and the separator plate 11 forms a first air passage 41. The lower end of the first air passage 41 is an air inlet 5. The gap between the second guide plate 13 and the first guide plate 12 forms a second air passage 42. The gap between the second guide plate 13 and the side wall of the side cover plate body 1 forms a third air passage 43. The first air passage 41, the second air passage 42, and the third air passage 43 are connected in sequence to form a maze. One end of the third air passage 43 communicates with the air outlet 6. The first air passage 41 is provided with a first oil blocking mechanism, and the second air passage 42 is provided with a second oil blocking mechanism.

[0027] The side cover plate assembly 111 is assembled on the front end face of the cylinder head assembly 112. The side cover plate assembly 111 includes a side cover plate body 1, and a labyrinth cavity 4 is arranged at the upper left position of the side cover plate body 1.

[0028] The first oil baffle mechanism includes a first baffle 21 and a third baffle 23 arranged at intervals above and below on the partition plate 11, and a second baffle 22 arranged on the first guide plate 12. The second baffle 22 is located between the first baffle 21 and the third baffle 23. The first baffle 21, the second baffle 22, and the third baffle 23 all extend obliquely downward. Specifically, the first baffle 21, the second baffle 22, and the third baffle 23 play a role in blocking the flow of oil and gas, increasing the separation speed of oil and gas.

[0029] The second oil baffle mechanism includes a fourth baffle 24 arranged at the top of the first guide plate 12 and a fifth baffle 25 of the first guide plate 12 arranged below the second guide plate 13. The fourth baffle 24 extends horizontally toward the second guide plate 13, and the fifth baffle 25 extends obliquely upward. Specifically, the fourth baffle 24 and the fifth baffle 25 can change the advancing direction of the oil and gas.

[0030] The second guide plate 13 is parallel to the side wall of the side cover plate body 1.

[0031] The second guide plate 13 is an arc-shaped plate structure bent toward the first guide plate 12.

[0032] The partition plate 11, the first guide plate 12, and the second guide plate 13 have the same height, that is, the tops of the partition plate 11, the first guide plate 12, and the second guide plate 13 all contact the labyrinth cover plate 2, achieving the effect of sealing the labyrinth.

[0033] The gap between the first baffle 21 and the first guide plate 12 is 8 - 12 mm, the gap between the second baffle 22 and the partition plate 11 is 8 - 12 mm, and the gap between the fourth baffle 24 and the second guide plate 13 is 8 - 12 mm, ensuring that the guiding air flow flows smoothly along the labyrinth.

[0034] Preferably, the gap between the first baffle 21 and the first guide plate 12 is 10 mm, the gap between the second baffle 22 and the partition plate 11 is 10 mm, and the gap between the fourth baffle 24 and the second guide plate 13 is 10 mm.

[0035] The partition plate 11, the first guide plate 12, and the side wall of the side cover plate body 1 are all provided with connecting lugs 7. The connecting lugs 7 are provided with screw holes, and the labyrinth cover plate 2 is locked on the screw holes of the connecting lugs 7 through bolts 3.

[0036] The separator plate 11, the first guide plate 12, the second guide plate 13, the side cover plate body 1, the first baffle 21, the second baffle 22, the third baffle 23, the fourth baffle 24, and the fifth baffle 25 are of an integrally formed structure. Specifically, the separator plate 11, the first guide plate 12, the second guide plate 13, the side cover plate body 1, the first baffle 21, the second baffle 22, the third baffle 23, the fourth baffle 24, and the fifth baffle 25 are integrally cast. It is not necessary to change the appearance of the front cover plate due to the arrangement of the labyrinth, and there is no need to additionally add parts such as the breather labyrinth baffle, reducing the number of parts and the cost of the engine.

[0037] Working principle:

[0038] The labyrinth cover plate 2 of the present invention is installed on the side cover plate body 1 and fixed with 7 M5 bolts 3. After the labyrinth cover plate is installed, the entire labyrinth cavity 4 forms a sealed channel. Since the pressure in the gear chamber communication cavity 8 is higher than the atmospheric pressure, under the action of the pressure difference, a large amount of oil and gas in the gear chamber communication cavity 8 enters the labyrinth cavity 4 from the air inlet 5 and flows towards the air outlet 6 along the gaps between the separator plate 11, the first guide plate 12, the second guide plate 13 and the first baffle 21, the second baffle 22, the third baffle 23, the fourth baffle 24, and the fifth baffle 25. During this process, the oil and gas continuously wash the labyrinth oil retaining mechanism, causing the engine oil in the oil and gas to continuously adhere to the labyrinth oil retaining mechanism. After accumulating to a certain extent, it drips in the form of oil droplets and flows into the gear chamber communication cavity 8, thereby realizing the separation of oil and gas. The filtered air is discharged to the outside through the labyrinth air outlet 6.

[0039] The above is only the preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, which will not affect the implementation effect of the present invention and the practicality of the patent.

Claims

1. A side cover plate of a diesel engine with an oil-gas separation function, comprising a side cover plate body (1), characterized in that, The inner wall of the side cover body (1) is provided with a partition plate (11) that divides its inner cavity into a labyrinth cavity (4) and a gear chamber communication cavity (8), and a labyrinth cover plate (2) that covers the labyrinth cavity (4). The upper end of the partition plate (11) is connected to the top wall of the side cover body (1). An air outlet (6) is provided in the labyrinth cavity (4) on one side of the upper end of the partition plate (11). A first guide plate (12) is provided in the labyrinth cavity (4) and is arranged in the same extending direction as the partition plate (11). The lower end of the first guide plate (12) is connected to the side wall of the side cover body (1). The partition plate (11) at the bottom of the air outlet (6) is provided with a second guide plate (13) that extends downward. The first guide plate (12) is located between the second guide plate (13) and the partition plate (11). The gap between the first guide plate (12) and the partition plate (11) forms a first air passage (41). The lower end of the first air passage (41) is an air inlet (5). The gap between the second guide plate (13) and the first guide plate (12) forms a second air passage (42). The gap between the second guide plate (13) and the side wall of the side cover body (1) forms a third air passage (43). The first air passage (41), the second air passage (42), and the third air passage (43) are connected in sequence to form a labyrinth. One end of the third air passage (43) is communicated with the air outlet (6). The first air passage (41) is provided with a first oil blocking mechanism, and the second air passage (42) is provided with a second oil blocking mechanism; The first oil blocking mechanism includes a first baffle (21) and a third baffle (23) that are arranged at intervals up and down on the partition plate (11), and a second baffle (22) that is arranged on the first guide plate (12). The second baffle (22) is located between the first baffle (21) and the third baffle (23). The first baffle (21), the second baffle (22), and the third baffle (23) all extend downward obliquely; The second oil blocking mechanism includes a fourth baffle (24) arranged at the top of the first guide plate (12) and a fifth baffle (25) of the first guide plate (12) arranged below the second guide plate (13). The fourth baffle (24) extends horizontally toward the second guide plate (13), and the fifth baffle (25) extends upward obliquely; The labyrinth cavity (4) is arranged at the upper left position of the side cover body (1); The second guide plate (13) is parallel to the side wall of the side cover body (1); The partition plate (11), the first guide plate (12), and the side wall of the side cover body (1) are all provided with connecting lugs (7). The connecting lugs (7) are provided with screw holes. The labyrinth cover plate (2) is locked in the screw holes of the connecting lugs (7) through bolts (3); The partition plate (11), the first guide plate (12), the second guide plate (13), and the side cover body (1) are of an integrally formed structure.

2. The side cover plate of a diesel engine with an oil-gas separation function according to claim 1, characterized in that, The second guide plate (13) is an arc-shaped plate structure that bends toward the first guide plate (12).

3. A side cover plate of a diesel engine with an oil-gas separation function according to claim 1, characterized in that, The partition plate (11), the first guide plate (12), and the second guide plate (13) have the same height.

4. A side cover plate of a diesel engine with an oil-gas separation function according to claim 1, characterized in that, The gap between the first baffle plate (21) and the first guide plate (12) is 8 to 12 mm, the gap between the second baffle plate (22) and the partition plate (11) is 8 to 12 mm, and the gap between the fourth baffle plate (24) and the second guide plate (13) is 8 to 12 mm.

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