CN219159044U

CN219159044U - Oil return structure of oil-gas separator

Info

Publication number: CN219159044U
Application number: CN202320441433.5U
Authority: CN
Inventors: 刘向民; 王飞; 马顺成
Original assignee: Wuxi Yili Environmental Protection Technology Co Ltd; Hebei Yili Technology Co Ltd
Current assignee: Wuxi Yili Environmental Protection Technology Co Ltd; Hebei Yili Technology Co Ltd
Priority date: 2023-03-10
Filing date: 2023-03-10
Publication date: 2023-06-09
Anticipated expiration: 2033-03-10

Abstract

The utility model discloses an oil return structure of an oil-gas separator, wherein a separation plate is horizontally separated between an upper cavity and a lower cavity, a main shaft vertically penetrates through the separation plate, a bearing is arranged between the main shaft and the separation plate through a bearing bracket, the bearing is positioned above the separation plate, a plurality of backflow openings are formed in the bearing bracket, the axial positions of the backflow openings are positioned between the bearing and the separation plate, and the backflow openings are communicated with an oil collecting groove of the separation plate. The backflow notch is formed in the part lower than the bearing and communicated with the oil collecting groove of the partition plate, engine oil collected in the oil collecting groove in the upper cavity directly flows into the central channel from the backflow notch, the backflow path avoids the bearing, impurities in the backflow engine oil are prevented from adhering to the bearing to damage the bearing, the service life of the bearing is ensured, and the normal operation of the oil-gas separator is ensured.

Description

Oil return structure of oil-gas separator

Technical Field

The utility model belongs to the technical field of oil-gas separation of engine crankcases, and particularly relates to an oil return structure of an oil-gas separator.

Background

When the automobile engine normally runs and the piston moves up and down in the cylinder, a small part of mixed gas can be inevitably leaked into the crankcase through the clearance, so that the pressure in the crankcase is increased, and the sealing part is easy to leak; the impurities mixed in the mixed gas enter engine oil, so that the engine oil is polluted, and related parts of the engine are damaged; therefore, the blowby gas in the crankcase needs to be timely discharged by adopting an oil-gas separator between the engine and the crankcase.

Fig. 1 is a schematic structural view of a conventional oil-gas separator, wherein the bottom of an upper casing 1 is connected with a lower casing 2, and an upper cavity 11 of the upper casing 1 is separated from a lower cavity 21 of the lower casing 2 by a transverse partition plate 3; the main shaft 4 vertically penetrates through the upper cavity 11 and the lower cavity 21, the oil-gas separation part 5 is sleeved on the rod part of the main shaft 4 positioned in the upper cavity 11, the rotary part 6 is sleeved on the rod part of the main shaft 4 positioned in the lower cavity 21, and a bearing 8 is arranged between the main shaft 4 and the partition plate 3 through a bearing bracket 7; the annular gap between the bearing support 7 and the spindle 4 forms a return channel 9, and the slit between the bearing support 7 and the rotating member 6 forms a return gap 10; the partition plate 3 is connected to the upper end portion of the bearing bracket 7 at a position close to the upper end portion. The oil return route of the oil-gas separator is as follows: the oil which is rotated in the upper chamber 11 and is thrown onto the wall surface of the upper housing 1 by the oil-gas separation member 5 flows downwards onto the partition plate 3 under the action of gravity, when the oil accumulated on the partition plate 3 passes through the upper port of the bearing bracket 7, the accumulated oil flows downwards into the bearing 8 from the return passage 9, is discharged downwards onto the rotating member 6 through the gaps between the balls of the bearing 8, flows out into the lower chamber 21 from the return gap 10 under the action of centrifugal force, and returns into the oil pan of the engine from the oil return port of the lower housing 2. Because the engine oil contains more or less oil sludge, acidic substances, emulsifying substances and other impurities, the impurities possibly adhere to the bearing 8 when flowing through the bearing 8, so that the bearing 8 is damaged by blockage, abrasion, corrosion and the like, the service life of the bearing 8 is further shortened, and the normal operation of an oil-gas separator is influenced.

Disclosure of Invention

The applicant provides an oil-gas separator oil return structure with reasonable structure, which aims at the defect that the oil return structure of the existing oil-gas separator is easy to cause damage to a bearing, and the oil return avoids the bearing to flow back to a lower cavity so as to prevent the bearing from being damaged.

The technical scheme adopted by the utility model is as follows:

an oil return structure of an oil-gas separator is characterized in that a separation plate is transversely separated between an upper cavity and a lower cavity, a main shaft vertically penetrates through the separation plate, a bearing is arranged between the main shaft and the separation plate through a bearing support, the bearing is located above the separation plate, a plurality of backflow openings are formed in the bearing support, the axial positions of the backflow openings are located between the bearing and the separation plate, and the backflow openings are communicated with an oil collecting groove of the separation plate.

As a further improvement of the above technical scheme:

the bottom surface of the bearing is higher than the inner side of the partition plate by a certain distance.

The partition plate is a plate of an outer high insole and comprises a high section of an outer ring part, a low section of a central part and an inclined surface section connected with the high section and the low section; the low-lying area formed on the upper side of the low-lying section and the inclined surface section forms an oil collecting groove.

The upper side surface of the high-level section of the partition plate is flush with the bottom surface of the bearing or slightly lower than the bottom surface of the bearing.

The top side surface of the backflow notch is flush with the bottom surface of the bearing or slightly lower than the bottom surface of the bearing.

The bottom side of the reflux opening is flush with or slightly lower than the upper side of the lower section.

The outer wall surface of the bearing bracket is provided with a mounting groove, and the inner edge of the partition plate is inserted into the mounting groove.

The inner side of the partition plate is provided with a plurality of bent claws which are embedded in the bearing bracket.

The outer wall surface of the bearing bracket is provided with a plurality of reinforcing ribs.

The main shaft is sleeved with an oil-gas separation part and a rotating part, the oil-gas separation part is positioned in the upper cavity, and the rotating part is positioned in the lower cavity; the slit between the bearing bracket and the rotating part forms a backflow gap, and the central channel of the bearing bracket is communicated with the backflow gap.

The beneficial effects of the utility model are as follows:

the backflow notch is formed in the part lower than the bearing and communicated with the oil collecting groove of the partition plate, engine oil collected in the oil collecting groove in the upper cavity directly flows into the central channel from the backflow notch, the backflow path avoids the bearing, impurities in the backflow engine oil are prevented from adhering to the bearing to damage the bearing, the service life of the bearing is ensured, and the normal operation of the oil-gas separator is ensured.

The bottom side of the reflux opening is flush with the upper side of the partition plate or slightly lower than the upper side of the partition plate, so that the engine oil in the oil collecting groove is completely discharged, and the engine oil is prevented from being deposited on the oil collecting groove. The top side of the backflow notch and the upper side of the high section of the partition plate are flush with the bottom surface of the bearing or slightly lower than the bottom surface of the bearing, so that the backflow engine oil can be guaranteed to completely avoid the bearing, and the bearing is prevented from being damaged.

The oil collecting groove is arranged at the central part of the partition plate, so that the engine oil flowing onto the partition plate can be collected into the oil collecting groove, the inclined surface section has a diversion effect on the engine oil, and the engine oil at the high position section can be guided into the oil collecting groove.

Drawings

Fig. 1 is a schematic structural view of a conventional oil-gas separator.

Fig. 2 is a schematic structural view of the present utility model.

Fig. 3 is an enlarged view of a portion a in fig. 2.

Fig. 4 is a perspective view of the bearing bracket.

Fig. 5 is a schematic view of a semi-sectional structure of the divider plate mated with the bearing support.

In the figure: 1. an upper housing; 11. an upper cavity; 2. a lower housing; 21. a lower cavity; 3. a partition plate; 31. a high-level section; 32. a lower section; 33. a bevel section; 34. an oil sump; 35. a curved claw; 4. a main shaft; 5. an oil-gas separation part; 6. a rotating member; 7. a bearing support; 70. a central passage; 71. a bearing mounting portion; 72. a mounting groove; 73. reflux opening; 74. reinforcing ribs; 8. a bearing; 9. a return passage; 10. and a back flow gap.

Detailed Description

The following describes specific embodiments of the present utility model with reference to the drawings.

As shown in fig. 2, the basic structure of the utility model is basically the same as that of the conventional oil-gas separator in fig. 1, the upper shell 1 is connected with the lower shell 2, the partition plate 3 is horizontally separated between the upper cavity 11 and the lower cavity 21, the main shaft 4 vertically passes through the partition plate 3 and penetrates through the upper cavity 11 and the lower cavity 21, the main shaft 4 is sleeved with the oil-gas separation part 5 and the rotating part 6, the oil-gas separation part 5 is positioned in the upper cavity 11, the rotating part 6 is positioned in the lower cavity 21, the bearing 8 is arranged between the main shaft 4 and the partition plate 3 through the bearing bracket 7, and the slit between the bearing bracket 7 and the rotating part 6 forms a backflow gap 10.

As shown in fig. 2 and 5, the partition plate 3 is a plate member of an outer high insole, and includes a high-level section 31 of an outer ring portion, a low-level section 32 at a central portion, and a slope section 33 connecting the high-level section and the low-level section, and a low-level oil sump 34 is formed at the central portion of the partition plate 3 at the upper side of the low-level section 32 and the slope section 33; the oil collecting groove 34 is arranged at the central part of the partition plate 3, so that the engine oil flowing onto the partition plate 3 can be collected into the oil collecting groove 34, the inclined surface section 33 has a diversion effect on the engine oil, and the engine oil of the high-level section 31 can be guided into the oil collecting groove 34. The inside of the lower section 32 of the partition plate 3 is provided with a plurality of bent claws 35, and the bent claws 35 are embedded in the bearing bracket 7, so that the relative rotation between the bearing bracket 7 and the partition plate 3 can be prevented, and better support is provided.

As shown in fig. 3 to 5, the bearing bracket 7 has a central passage 70 passing through the center thereof in the axial direction, and the central passage 70 communicates with the return gap 10. The upper part of the central passage 70 is a bearing mounting part 71, and the bearing 8 is inserted into the bearing mounting part 71. A circle of mounting grooves 72 are formed in the outer wall surface of the middle of the bearing bracket 7, and the inner side edge of the partition plate 3 is inserted into the mounting grooves 72; the bottom of the bearing mounting portion 71 is higher than the top of the mounting groove 72, and after the partition plate 3 and the bearing 8 are mounted, the bearing 8 is located above the partition plate 3, and the bottom is higher than the upper side of the inner side of the partition plate 3 by a certain distance. The middle wall surface of the bearing bracket 7 is provided with a plurality of backflow openings 73 penetrating through the central channel 70 along the circumferential direction, the axial position of the backflow openings 73 is positioned between the bearing mounting part 71 and the mounting groove 72, namely, the backflow openings 73 are arranged at the position lower than the bearing 8 and are communicated with the oil collecting groove 34 of the partition plate 3, engine oil collected into the oil collecting groove 34 in the upper cavity 11 directly flows into the central channel 70 from the backflow openings 73 and is positioned in the area below the bearing 8, is discharged from the backflow gap 10, the backflow path avoids the bearing 8, the damage to the bearing 8 caused by the adhesion of impurities in the backflow engine oil to the bearing 8 is prevented, the service life of the bearing 8 is ensured, and the normal operation of the oil-gas separator is ensured. As shown in fig. 5, the bottom side of the backflow notch 73 is flush with the upper side of the lower section 32 of the partition plate 3 or slightly lower than the upper side of the lower section 32, which is beneficial to thoroughly discharging the engine oil in the oil sump 34 and avoiding the engine oil from depositing on the oil sump 34; the top side surface of the backflow notch 73 and the upper side surface of the high-level section 31 of the partition plate 3 are flush with the bottom surface of the bearing 8 or slightly lower than the bottom surface of the bearing 8, so that the backflow engine oil can be ensured to completely avoid the bearing 8, and the bearing 8 is prevented from being damaged. A plurality of reinforcing ribs 74 are arranged on the outer wall surface of the bearing bracket 7 along the circumferential direction, so that the strength of the bearing bracket 7 is improved.

When the utility model is actually used, the oil return route is as follows: the oil which is thrown onto the wall surface of the upper casing 1 by the rotating oil-gas separation member 5 in the upper cavity 11 flows down onto the partition plate 3 under the action of gravity and is collected into the oil sump 34, flows into the central passage 70 from the return gap 73 of the bearing bracket 7, flows out into the lower cavity 21 from the return gap 10 under the action of centrifugal force, and returns into the oil pan of the engine from the oil return port of the lower casing 2.

The above description is illustrative of the utility model and is not intended to be limiting, and the utility model may be modified in any form without departing from the spirit of the utility model.

Claims

1. Oil return structure of oil and gas separator, division board (3) are transversely separated between last cavity (11) and lower cavity (21), and division board (3) are passed vertically to main shaft (4), set up bearing (8) through bearing support (7) between main shaft (4) and division board (3), its characterized in that: the bearing (8) is located division board (3) top, has seted up a plurality of backward flow openings (73) on the bearing support (7), and the axial position that backward flow opening (73) were seted up is located between bearing (8) and division board (3), and the oil collecting groove (34) of backward flow opening (73) intercommunication division board (3).

2. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the bottom surface of the bearing (8) is higher than the inner side of the partition plate (3) by a certain distance.

3. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the partition plate (3) is a plate of an outer high insole and comprises a high-level section (31) of an outer ring part, a low-level section (32) of a central part and an inclined surface section (33) connected with the high-level section and the low-level section; the depression area formed on the upper side of the low-level section (32) and the inclined surface section (33) forms an oil collecting groove (34).

4. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the upper side surface of the high-level section (31) of the partition plate (3) is flush with the bottom surface of the bearing (8) or slightly lower than the bottom surface of the bearing (8).

5. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the top side surface of the backflow notch (73) is flush with the bottom surface of the bearing (8) or slightly lower than the bottom surface of the bearing (8).

6. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the bottom side of the backflow notch (73) is flush with the upper side of the lower section (32) or slightly lower than the upper side of the lower section (32).

7. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the outer wall surface of the bearing bracket (7) is provided with a mounting groove (72), and the inner side edge of the partition plate (3) is inserted into the mounting groove (72).

8. The oil return structure of the oil-gas separator according to claim 1, characterized in that: the inner side of the partition plate (3) is provided with a plurality of bent claws (35), and the bent claws (35) are embedded into the bearing bracket (7).

9. The oil return structure of the oil-gas separator according to claim 1, characterized in that: a plurality of reinforcing ribs (74) are arranged on the outer wall surface of the bearing bracket (7).

10. The oil return structure of the oil-gas separator according to claim 1, characterized in that: an oil-gas separation part (5) and a rotary part (6) are sleeved on the main shaft (4), the oil-gas separation part (5) is positioned in the upper cavity (11), and the rotary part (6) is positioned in the lower cavity (21); the slit between the bearing support (7) and the rotating part (6) forms a backflow gap (10), and the central channel (70) of the bearing support (7) is communicated with the backflow gap (10).