CN219452249U

CN219452249U - Crankcase cover structure and engine

Info

Publication number: CN219452249U
Application number: CN202320458622.3U
Authority: CN
Inventors: 丁锐; 吴中涛; 向松; 唐晨峰
Original assignee: Chongqing Rato Technology Co Ltd
Current assignee: Chongqing Rato Technology Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-08-01
Anticipated expiration: 2033-03-10

Abstract

The utility model provides a crankcase cover structure, which comprises a crankcase cover, wherein a separation cavity is arranged in the crankcase cover, a labyrinth channel is arranged in the separation cavity, and air inlets and air outlets are respectively arranged at two ends of the labyrinth channel. The inboard of case lid is equipped with the oil outlet, and the oil outlet communicates with maze passageway, and the level height position of oil outlet is less than the level height position of venthole. The crankcase cover structure prolongs the flow path of the air flow by designing the labyrinth channel, realizes the separation of oil mist and the air flow, and improves the oil-gas separation effect. Meanwhile, as the oil mist is trapped in the labyrinth passage, the separated air flow enters the negative pressure pipe through the air outlet, so that the engine oil in the crankcase is prevented from entering the negative pressure pipe, and the normal operation of the oil pump is ensured. The utility model provides an engine, which improves the overall performance of the engine by using the crankcase cover structure.

Description

Crankcase cover structure and engine

Technical Field

The utility model relates to the technical field of engines, in particular to a crankcase cover structure and an engine.

Background

The engine crankcase of the existing generator set mainly comprises a box body and a box cover, the crankcase is communicated with the oil pump through a negative pressure pipe, and when the oil pump works, the normal work of the crankcase is guaranteed by means of negative pressure, so that the crankcase also bears the task of providing negative pressure for the oil pump.

Because the crankcase can constantly produce high heat in the operation process, the engine oil in its inside can evaporate into the oil mist, if the oil mist follows the air current and enters into in the negative pressure pipe, will influence the normal work of oil pump, therefore, proposes a crankcase cover structure, before the air current enters into the negative pressure pipe, realizes oil-gas separation to guarantee the normal work of oil pump.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a crankcase cover structure and an engine so as to improve the oil-gas separation effect and ensure the normal operation of an oil pump.

In order to achieve the above object, one of the objects of the present utility model is to provide a crankcase cover structure including a cover; a separation cavity is arranged in the box cover, a labyrinth channel is arranged in the separation cavity, air inlet holes and air outlet holes are respectively arranged at two ends of the labyrinth channel, the air inlet holes are formed in the inner side of the box cover, and the air outlet holes are formed in the outer side of the box cover; the inner side of the box cover is provided with an oil outlet, the oil outlet is communicated with the labyrinth channel, and the horizontal height position of the oil outlet is lower than that of the air outlet.

Preferably, a first partition plate and a second partition plate are arranged in the separation cavity, the first partition plate and the second partition plate divide the separation cavity into a first cavity, a second cavity and a third cavity, and the first cavity, the second cavity and the third cavity are sequentially communicated to form the labyrinth passage; the air inlet hole is communicated with the first cavity, the air outlet hole is communicated with the third cavity, and the oil outlet hole is communicated with the second cavity.

Preferably, the upper end of the first chamber is communicated with the upper end of the second chamber, and the lower end of the second chamber is communicated with the lower end of the third chamber.

Preferably, the upper end of the second separator is close to the air outlet, one end of the second separator, which is far away from the air outlet, is provided with an extension plate, and the extension plate is bent towards the side far away from the first separator.

Preferably, a vent is formed between the extension plate and the inner wall of the separation chamber, and the cross-sectional area of the vent is smaller than the cross-sectional area of the second chamber.

Preferably, a first guide surface and a second guide surface are formed on the inner wall of the second chamber, an inclined guide groove is formed at the joint of the first guide surface and the second guide surface, and the lower end of the guide groove is communicated with the oil outlet.

Preferably, the box cover comprises a cover body and a baffle plate, wherein the cover body is concavely provided with a containing groove, the baffle plate covers the containing groove and forms the separation cavity, and the oil outlet is formed in the baffle plate.

Another object of the present utility model is to provide an engine, including the crankcase cover structure.

The utility model has the beneficial effects that:

the utility model discloses a crankcase cover structure, which prolongs the flow path of air flow, realizes the separation of oil mist and air flow and improves the oil-gas separation effect by designing a labyrinth channel. Meanwhile, as the oil mist is trapped in the labyrinth passage, the separated air flow enters the negative pressure pipe through the air outlet, so that the engine oil in the crankcase is prevented from entering the negative pressure pipe, and the normal operation of the oil pump is ensured.

The utility model also discloses an engine, which prevents engine oil in the crankcase from entering the negative pressure pipe by using the crankcase cover structure, ensures the normal operation of the oil pump and improves the overall performance of the engine.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

Fig. 1 is a schematic structural diagram of a crankcase cover structure according to an embodiment of the utility model;

FIG. 2 is a partial schematic view of an inlet port, an outlet port, and an outlet port;

FIG. 3 is a schematic view of the structure after concealing the baffle;

FIG. 4 is a schematic view of the structure of the baffle and the cover;

reference numerals:

10-a box cover, 11-a cover body, 111-a containing groove and 12-a baffle plate;

21-air inlet holes, 22-air outlet holes, 23-oil outlet holes and 24-air vents;

31-a first separator, 32-a second separator, 33-an extension plate;

41-first chamber, 42-second chamber, 43-third chamber;

51-first guide surface, 52-second guide surface, 53-guiding groove.

Detailed Description

Embodiments of the technical scheme of the present utility model will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and thus are merely examples, and are not intended to limit the scope of the present utility model.

It is noted that unless otherwise indicated, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model pertains.

In the description of the present application, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," etc. indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and to simplify the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is two or more unless specifically defined otherwise.

In this application, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In this application, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

Example 1

As shown in fig. 1 to 4, in an embodiment of the present utility model, a crankcase cover structure is provided, including a case cover 10, a separation chamber is provided in the case cover 10, a labyrinth passage is provided in the separation chamber, two ends of the labyrinth passage are respectively provided with an air inlet 21 and an air outlet 22, the air inlet 21 is provided on the inner side of the case cover 10, and the air outlet 22 is provided on the outer side of the case cover 10. The inner side of the case cover 10 is provided with an oil outlet hole 23, the oil outlet hole 23 is communicated with the labyrinth passage, and the horizontal height position of the oil outlet hole 23 is lower than that of the air outlet hole 22.

According to the crankcase cover structure disclosed by the embodiment, the labyrinth channel is designed in the separation cavity, the air flow mixed with oil mist enters the labyrinth channel from the air inlet 21 in the crankcase, the oil mist in the air flow can be cooled and condensed into oil droplets on the inner wall of the labyrinth channel in the process of flowing through the labyrinth channel, and the oil droplets can flow back to the inner cavity of the crankcase through the oil outlet 23 under the action of self gravity due to the fact that the horizontal height of the air outlet 22 is higher than that of the oil outlet 23, so that the purpose of separating oil mist from air flow is achieved, and oil-gas separation is achieved. The separated air flow enters the negative pressure pipe from the air outlet hole 22, so that negative pressure is provided for the oil pump.

In summary, the crankcase cover structure prolongs the flow path of the air flow by designing the labyrinth passage, realizes the separation of oil mist and the air flow, and improves the oil-gas separation effect. Meanwhile, as the oil mist is trapped in the labyrinth passage, the separated air flow enters the negative pressure pipe through the air outlet hole 22, so that the engine oil in the crankcase is prevented from entering the negative pressure pipe, and the normal operation of the oil pump is ensured.

In one embodiment, a first partition plate 31 and a second partition plate 32 are arranged in the separation cavity, the first partition plate 31 and the second partition plate 32 divide the separation cavity into a first chamber 41, a second chamber 42 and a third chamber 43, and the first chamber 41, the second chamber 42 and the third chamber 43 are sequentially communicated to form a labyrinth passage. The air inlet 21 communicates with the first chamber 41, the air outlet 22 communicates with the third chamber 43, and the oil outlet 23 communicates with the second chamber 42.

After entering the first chamber 41 from the air inlet 21, the air flow mixed with the oil mist in the crankcase flows to the air outlet 22 through the second chamber 42 and the third chamber 43 in sequence, and in the process, the oil mist is cooled and condensed into oil droplets on the inner cavity walls of the first chamber 41, the second chamber 42 and the third chamber 43, so that oil-gas separation is realized. At the same time, most of the oil mist is cooled and condensed in the second chamber 42 and the third chamber 43, and the condensed oil droplets are convenient to flow out of the second chamber 42 through the oil outlet 23 and finally flow back into the inner cavity of the crankcase.

In one embodiment, the upper end of the first chamber 41 communicates with the upper end of the second chamber 42, and the lower end of the second chamber 42 communicates with the lower end of the third chamber 43. The overall structural design of the first chamber 41, the second chamber 42 and the third chamber 43 prolongs the flow path of the air flow, improves the interception effect of oil mist, and thus improves the oil-gas separation effect. Meanwhile, the situation that the airflow is not smooth in the labyrinth channel is avoided, and the normal flow of the airflow is ensured.

In one embodiment, the upper end of the second separator 32 is close to the air outlet 22, and the end of the second separator 32 away from the air outlet 22 is provided with an extension plate 33, and the extension plate 33 is bent toward the side away from the first separator 31. The design of the extension plate 33 increases the inner space of the second chamber 42 and reduces the inner space of the third chamber 43, so that most of oil mist is condensed in the first chamber 41 and the second chamber 42 (mainly on the inner cavity wall of the second chamber 42), and only a small part of oil mist is condensed in the third chamber 43, thereby improving the interception effect of the oil mist, reducing the discharge amount of the oil mist from the air outlet hole 22 and ensuring the normal operation of the oil pump.

In one embodiment, the vent 24 is formed between the extension plate 33 and the inner wall of the separation chamber, and the cross-sectional area of the vent 24 is smaller than the cross-sectional area of the second chamber 42. After the air flow enters the second chamber 42, since the cross-sectional area of the air vent 24 is smaller than that of the second chamber 42, the flow rate of the air flow entering the third chamber 43 through the air vent 24 becomes faster, and thus the flow rate of the air flow is increased.

In one embodiment, the inner wall of the second chamber 42 is formed with a first guiding surface 51 and a second guiding surface 52, an inclined guiding groove 53 is arranged at the connection position of the first guiding surface 51 and the second guiding surface 52, and the lower end of the guiding groove 53 is communicated with the oil outlet 23. After the oil mist is cooled and condensed into oil droplets in the second chamber 42 and the third chamber 43, the oil droplets flow into the diversion trench 53 along the first diversion trench 51 and the second diversion trench 52, and the oil droplets in the labyrinth passage can smoothly flow back into the inner cavity of the crankcase due to the fact that the lower end of the diversion trench 53 is communicated with the oil outlet 23.

In one embodiment, the case cover 10 includes a cover body 11 and a baffle plate 12, the cover body 11 is concavely formed with a receiving groove 111, the baffle plate 12 is covered on the receiving groove 111 and forms a separation chamber, and the oil outlet hole 23 is opened on the baffle plate 12.

Example two

In an embodiment of the present utility model, an engine is provided, including the crankcase cover structure in the first embodiment, by using the crankcase cover structure, engine oil in a crankcase is prevented from entering a negative pressure pipe, normal operation of an oil pump is ensured, and overall performance of the engine is improved.

In the description of the present utility model, numerous specific details are set forth. However, it is understood that embodiments of the utility model may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model, and are intended to be included within the scope of the appended claims and description.

Claims

1. A crankcase cover structure is characterized by comprising a case cover;

a separation cavity is arranged in the box cover, a labyrinth channel is arranged in the separation cavity, air inlet holes and air outlet holes are respectively arranged at two ends of the labyrinth channel, the air inlet holes are formed in the inner side of the box cover, and the air outlet holes are formed in the outer side of the box cover;

the inner side of the box cover is provided with an oil outlet, the oil outlet is communicated with the labyrinth channel, and the horizontal height position of the oil outlet is lower than that of the air outlet.

2. The crankcase cover structure according to claim 1, wherein a first partition plate and a second partition plate are arranged in the separation chamber, the first partition plate and the second partition plate divide the separation chamber into a first chamber, a second chamber and a third chamber, and the first chamber, the second chamber and the third chamber are sequentially communicated to form the labyrinth passage;

the air inlet hole is communicated with the first cavity, the air outlet hole is communicated with the third cavity, and the oil outlet hole is communicated with the second cavity.

3. The crankcase cover structure of claim 2, wherein an upper end of said first chamber communicates with an upper end of said second chamber and a lower end of said second chamber communicates with a lower end of said third chamber.

4. The crankcase cover structure according to claim 3, wherein an upper end of the second partition is adjacent to the air outlet, an end of the second partition remote from the air outlet is provided with an extension plate, and the extension plate is bent toward a side remote from the first partition.

5. The crankcase cover structure according to claim 4, wherein a vent is formed between the extension plate and an inner wall of the separation chamber, the vent having a cross-sectional area smaller than a cross-sectional area of the second chamber.

6. The crankcase cover structure according to claim 5, wherein a first guide surface and a second guide surface are formed on an inner wall of the second chamber, an inclined guide groove is formed at a joint of the first guide surface and the second guide surface, and a lower end of the guide groove is communicated with the oil outlet.

7. The crankcase cover structure according to claim 1, wherein the case cover includes a cover body and a baffle plate, the cover body is concavely formed with a receiving groove, the baffle plate is covered on the receiving groove and forms the separation chamber, and the oil outlet is opened on the baffle plate.

8. An engine, characterized in that: comprising a crankcase cover structure according to any of claims 1-7.