CN215409280U

CN215409280U - Oil control structure and molecular pump with same

Info

Publication number: CN215409280U
Application number: CN202121752533.7U
Authority: CN
Inventors: 陈林; 邓高飞; 苗占全
Original assignee: Zhongke Jiuwei Technology Co ltd
Current assignee: Zhongke Jiuwei Technology Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-01-04
Anticipated expiration: 2031-07-29

Abstract

The utility model provides an oil control structure, which belongs to the technical field of molecular pump oil supply and comprises the following components: the base is internally provided with a main shaft and a bearing, and the main shaft is internally provided with an oil through hole and an oil outlet hole; the oil outlet hole is formed in the base, and the oil outlet hole is formed in the annular inner wall of the oil retaining control; an annular flange is arranged on the blocking control piece, a second oil leakage hole is formed in the annular flange, and a bearing is communicated with the lower portion of the second oil leakage hole; the base is also provided with a circulating oil path, and the lubricating oil is suitable for flowing back to the circulating oil path along the upper surface of the annular flange. According to the oil control structure provided by the utility model, the oil blocking control part is arranged to block the lubricating oil thrown out from the oil outlet, so that the lubricating oil is prevented from splashing everywhere, and the lubricating oil can flow onto the bearing only through the first oil leakage hole and the second oil leakage hole, so that the flow of the lubricating oil is controlled, excessive lubricating oil is prevented from flowing onto the bearing, and the heat productivity of the bearing during high-speed operation is reduced.

Description

Oil control structure and molecular pump with same

Technical Field

The utility model relates to the technical field of oil supply of molecular pumps, in particular to an oil control structure and a molecular pump with the same.

Background

During high speed rotation of the molecular pump, high friction is generated at the bearings and thus a large amount of heat is emitted, which can reduce the service life of the bearings. In order to reduce friction and heat at the bearings, the bearings are generally lubricated by an oil supply cone in a splash pattern.

For example, chinese patent document CN201461519U discloses a molecular pump oil supply cone, in which a through hole for flowing lubricating oil is formed in an oil supply cone body, and a lower bearing lubricating hole is formed at a position corresponding to a bearing; when the oil supply cone is used, the oil supply cone body rotates, and then lubricating oil is supplied to the bearing in a splashing mode through the lubricating hole of the lower bearing.

However, according to the above scheme, due to the processing error of the oil supply cone, the problem of unstable oil supply amount exists in the process of rotating oil supply of the oil supply cone body, and when the oil supply amount is too large, too much lubricating oil increases the rolling resistance of bearing beads, so that the temperature of the bearing is increased, and the service life of the bearing is influenced.

SUMMERY OF THE UTILITY MODEL

Therefore, the technical problem to be solved by the utility model is to overcome the defect of overlarge oil quantity when the oil supply cone is adopted to supply oil to the molecular pump in the prior art.

In order to solve the technical problem, the utility model provides an oil control structure, which comprises:

the oil outlet device comprises a base, a bearing, an oil outlet hole and a bearing, wherein the main shaft and the bearing are arranged in the base and used for being connected with the main shaft;

the oil outlet hole is formed in the base, the oil outlet hole is formed in the annular inner wall of the oil retaining control, and a plurality of first oil leakage holes penetrating through the annular wall of the oil retaining control are formed in the annular inner wall of the oil retaining control;

an annular flange is arranged on the outer circumference of the annular wall of the blocking control piece, the annular flange is positioned below the first oil leakage hole, a plurality of second oil leakage holes are formed in the annular flange, and the lower portions of the second oil leakage holes are communicated with the bearing;

and the base is internally provided with a circulating oil path which is arranged below the blocking control element, and the lubricating oil is suitable for flowing back to the circulating oil path along the upper surface of the annular flange.

The upper surface of the annular flange is of an outward inclined slope structure.

The oil baffle control part is of a split structure and comprises an annular flange and an oil baffle ring, a groove is formed in the upper surface of the annular flange, the oil baffle ring is clamped in the groove, and the first oil leakage hole is formed in the oil baffle ring.

The first oil leakage hole and the oil outlet hole are perpendicular to the axis of the main shaft, and the second oil leakage hole is parallel to the axis of the main shaft.

The first oil leakage holes and the second oil leakage holes are arranged at intervals, and the first oil leakage holes and the second oil leakage holes are arranged in a one-to-one correspondence mode.

The bearing locking device is characterized in that a bearing locking block is fixedly arranged on the upper surface of the inner ring of the bearing, the bearing locking block is fixedly connected with the outer wall of the main shaft, and a communicating hole which penetrates through the bearing locking block and is communicated with the oil outlet is formed in the bearing locking block.

The annular inner wall of the blocking control part is arranged in a clearance with the bearing locking block, and the clearance is communicated to the bearing.

The bearing is characterized in that a bearing seat is connected to the outer ring of the bearing, and the annular flange is arranged on the bearing seat.

The annular flange is provided with a mounting hole, and a fastener penetrates through the mounting hole and is fastened on the bearing seat so as to connect the blocking control piece with the bearing seat.

The utility model also provides a molecular pump which comprises the oil control structure.

The technical scheme of the utility model has the following advantages:

1. according to the oil control structure provided by the utility model, the lubricating oil is conveyed into the bearing arranged on the main shaft through the oil through hole and the oil outlet hole, the blocking control part is sleeved outside the main shaft to block the lubricating oil thrown out from the oil outlet hole, so that the lubricating oil is prevented from splashing around, the first oil leakage hole and the second oil leakage hole are arranged on the blocking control part, the lubricating oil output by the oil outlet hole can flow onto the bearing through the first oil leakage hole and the second oil leakage hole, therefore, the flow of the lubricating oil is controlled, excessive lubricating oil is prevented from flowing onto the bearing, the heat productivity of the bearing during high-speed operation is reduced, and the excessive lubricating oil can flow into the circulating oil way from the upper surface of the annular flange, so that the excessive lubricating oil can be recycled.

2. According to the oil control structure provided by the utility model, the upper surface of the annular flange is set to be the slope structure which is inclined outwards, so that redundant lubricating oil can flow from the slope structure to the circulating oil way more conveniently, and the oil control effect of the control block is improved.

3. According to the oil control structure provided by the utility model, the blocking control piece is arranged to be a split structure consisting of the annular flange and the oil blocking ring, so that the blocking control piece is convenient to process and manufacture; and, set up the recess through the upper surface at the annular flange to with the oil slinger joint in the recess, the equipment of the oil slinger of being more convenient for and annular flange.

4. According to the oil control structure provided by the utility model, the first oil leakage hole and the oil outlet hole are arranged perpendicular to the axis of the main shaft, and the second oil leakage hole is arranged parallel to the axis of the main shaft, so that the oil control structure is more attached to the flowing route of lubricating oil, and is simple and convenient to process and manufacture.

5. According to the oil control structure provided by the utility model, the first oil leakage hole and the second oil leakage hole are arranged in plurality, so that the lubricating oil does not splash and does not have too much oil when flowing out of the oil outlet hole, the oil quantity of the lubricating oil is not too little, and the bearing is ensured to be fully lubricated; and first oil leak hole and second oil leak hole one-to-one set up, in the second oil leak hole is flowed from first oil leak hole to the lubricating oil of being more convenient for, guarantee lubricating efficiency.

6. According to the oil control structure provided by the utility model, the bearing locking block is arranged to limit the axial movement of the bearing, and the communication hole communicated with the oil outlet hole is formed in the bearing locking block, so that the arrangement of the bearing locking block is ensured not to influence the outflow of lubricating oil.

7. According to the oil control structure provided by the utility model, the annular inner wall of the blocking control part and the bearing locking block are arranged in a clearance manner, so that the main shaft and the bearing locking block can be ensured to smoothly rotate in the blocking control part, and the clearance is communicated with the bearing, so that splashed oil drops blocked by the inner wall of the blocking control part can flow onto the bearing through the clearance, and the flowing lubricating oil can be fully utilized.

8. According to the oil control structure provided by the utility model, the bearing seat is arranged on the outer ring of the bearing so as to fixedly install the bearing, and the annular flange of the blocking control part is arranged on the bearing seat so as to facilitate the installation of the blocking control part.

9. According to the oil control structure provided by the utility model, the annular flange is provided with the mounting hole and is connected with the bearing seat by the fastener, so that the detachable connection of the blocking control part and the bearing seat is realized, the blocking control part is more convenient to mount and replace, and the maintenance is facilitated.

10. The molecular pump provided by the utility model controls the lubricating oil flowing to the bearing by using the oil control structure, avoids excessive lubricating oil from flowing to the bearing, reduces the heat productivity of the bearing during high-speed operation, and can enable the redundant lubricating oil to flow into the circulating oil way again, thereby recycling the redundant lubricating oil.

Drawings

In order to more clearly illustrate the embodiments of the present invention 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, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

Fig. 1 is a schematic structural diagram of an overall oil control structure provided in an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a gear control provided in an embodiment of the present invention;

fig. 3 is a front sectional view of a stopper control provided in an embodiment of the present invention.

Description of reference numerals:

1. a main shaft; 2. an oil through hole; 3. an oil outlet hole; 4. a bearing; 5. an oil slinger; 6. a first oil leak hole; 7. an annular flange; 8. a second oil leak hole; 9. a circulating oil path; 10. a bearing locking block; 11. a communicating hole; 12. a bearing seat; 13. mounting holes; 14. a base.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 3, a specific embodiment of the oil control structure includes a base 14, a main shaft 1 rotatably disposed inside the base 14, and a bearing 4 connected to the main shaft 1, wherein an oil hole 2 axially disposed is formed in the center of the main shaft 1, a lower end of the oil hole 2 is connectable to an oil pool, an oil outlet hole 3 is circumferentially disposed on the main shaft 1, the oil outlet hole 3 penetrates through the main shaft 1 and is communicated with the oil hole 2, and the oil outlet hole 3 is located above the bearing 4. The outside cover of main shaft 1 is equipped with and keeps off the controlling part, keeps off the controlling part and includes oil scraper ring 5 and the annular flange 7 of locating oil scraper ring 5 below, and annular flange 7 outwards extends oil scraper ring 5 and sets up, and oil scraper ring 5 corresponds 3 settings of oil outlet, sets up the first oil leak hole 6 that runs through oil scraper ring 5 and set up on the oil scraper ring 5, sets up the second oil leak hole 8 that runs through annular flange 7 and set up on the annular flange 7, and second oil leak hole 8 is linked together with bearing 4. The base 14 is provided with a circulating oil path 9, the upper end of the circulating oil path 9 is arranged at the outer lower side of the annular flange 7, and the lower end of the circulating oil path 9 is finally communicated with the oil pool.

Carry lubricating oil to locating in the main shaft 1 bearing 4 through setting up oil hole 2 and oil outlet 3, keep off the control through establishing at main shaft 1 overcoat in order to block the lubricating oil that throws away from oil outlet 3, avoid lubricating oil to splash everywhere, and, set up first oil leak 6 and second oil leak 8 on keeping off the control, the lubricating oil of being exported by oil outlet 3 just can flow to bearing 4 on via first oil leak 6 and second oil leak 8, consequently, the flow to lubricating oil has been controlled, avoid too much lubricating oil to flow to bearing 4 on, calorific capacity when reducing bearing 4 high-speed operation, and, unnecessary lubricating oil can flow to circulation oil circuit 9 in from the upper surface of annular flange 7, thereby can carry out cyclic utilization to unnecessary lubricating oil.

In this embodiment, the upper surface of the annular flange 7 is inclined outward to form a slope structure, so that the excess lubricating oil can flow into the circulating oil path 9 from the slope structure more conveniently, and the oil control effect of the gear control element is improved.

In this embodiment, as shown in fig. 3, a groove is formed on the upper surface of the annular flange 7, and the lower end of the slinger 5 is clamped in the groove. The blocking control piece is arranged to be a split structure consisting of the annular flange 7 and the oil retainer ring 5, so that the blocking control piece is convenient to process and manufacture; and, set up the recess through the upper surface at annular flange 7 to with slinger 5 joint in the recess, be more convenient for the equipment of slinger 5 and annular flange 7.

In the embodiment, as shown in fig. 1 and 3, the first oil leakage hole 6 and the oil outlet hole 3 are both arranged perpendicular to the axis of the main shaft 1, and the second oil leakage hole 8 is arranged parallel to the axis of the main shaft 1, so that the flow path of the lubricating oil is better fitted, and the processing and the manufacturing are simple and convenient.

In the present embodiment, as shown in fig. 2, the first oil leakage holes 6 and the second oil leakage holes 8 are formed at intervals and are arranged in a one-to-one correspondence. When having guaranteed that lubricating oil can not splash and the oil mass can not be too much when flowing out by oil outlet 3, the oil mass of lubricating oil can not be too little yet, guarantees the abundant lubrication of bearing 4 to, in the lubricating oil of being convenient for flowed to second oil leak hole 8 from first oil leak hole 6, guaranteed lubricating efficiency.

As shown in fig. 1, the main shaft 1 is further provided with a bearing locking block 10, an inner wall of the bearing locking block 10 is connected with an outer portion of the main shaft 1, and a lower end of the bearing locking block 10 is connected with an upper surface of an inner ring of the bearing 4 to limit axial play of the bearing 4. The bearing locking block 10 is provided with a communicating hole 11 communicated with the oil outlet 3 correspondingly, so that the bearing locking block 10 is ensured not to influence the outflow of lubricating oil. As shown in fig. 1, a gap is formed between an inner wall of the blocking control element and an outer wall of the bearing locking block 10 to ensure that the main shaft 1 and the bearing locking block 10 smoothly rotate inside the blocking control element, and the gap is communicated with the bearing 4, so that splashed oil drops blocked by the inner wall of the blocking control element can flow onto the bearing 4 through the gap, and the flowing lubricating oil can be fully utilized.

As shown in fig. 1, a bearing seat 12 is provided on an inner wall of the base 14, and an outer ring of the bearing 4 is connected to the inner wall of the bearing seat 12 to fixedly mount the bearing 4. The upper surface of the bearing housing 12 is arranged higher than the upper surface of the bearing 4, and the annular flange 7 is connected to the upper surface of the bearing housing 12, so that a gap suitable for the circulation of lubricating oil is formed between the lower surface of the annular flange 7 and the upper surface of the bearing 4.

As shown in fig. 1 and 2, the annular flange 7 is further provided with a plurality of mounting holes 13, the mounting holes 13 are arranged along the periphery of the annular flange 7 at intervals, and bolts as fasteners are inserted into the mounting holes 13 and fastened on the bearing seat 12 to connect the blocking control member with the bearing seat 12. The detachable connection of the blocking control part and the bearing seat 12 is realized, the installation and the replacement of the blocking control part are more convenient, and the maintenance is convenient.

A specific embodiment of the molecular pump is also provided, which includes the above oil control structure, so as to control the lubricating oil flowing to the bearing 4 by using the oil control structure, avoid excessive lubricating oil flowing to the bearing 4, ensure good heat dissipation of the bearing 4, and enable the excessive lubricating oil to flow into the circulating oil path 9 again, thereby recycling the excessive lubricating oil.

In the case of using the oil control structure of the present embodiment, when the main shaft 1 rotates, the lubricating oil is delivered upward through the oil outlet hole 2 and flows out of the main shaft 1 from the oil outlet hole 3, when the oil outlet hole 3 and the communication hole 11 rotate to communicate with the first oil leakage hole 6, the lubricating oil flows out through the first oil leakage hole 6 and falls down onto the annular flange 7, a part of the lubricating oil flows onto the bearing 4 through the second oil leakage hole 8, and the excess lubricating oil flows into the circulation oil path 9 through the upper surface of the annular flange 7.

To sum up, the accuse oil structure that this embodiment provided blocks the lubricating oil that the oil outlet throwed away through establishing the fender controlling part at the main shaft overcoat, avoids lubricating oil to splash everywhere, and, set up first oil leak hole and second oil leak hole on keeping off the controlling part, just can flow to the bearing by the lubricating oil of oil outlet output via first oil leak hole and second oil leak hole, consequently control the flow of lubricating oil, avoid too much lubricating oil to flow to the bearing on, guarantee the good heat dissipation of bearing, and in the unnecessary lubricating oil can flow to the circulation oil circuit from the upper surface of annular flange, thereby can carry out cyclic utilization to unnecessary lubricating oil.

As an alternative embodiment, the number and diameter of the first oil leak hole 6 and the second oil leak hole 8 and the relative position of the first oil leak hole 6 and the second oil leak hole 8 can be adjusted according to the amount of lubricating oil required, and when the amount of oil supply is large, the first oil leak hole 6 and the second oil leak hole 8 can be arranged in a deviating manner to reduce the amount of oil flowing into the second oil leak hole 8. Therefore, by adjusting the relative positions of the first oil leak hole 6 and the second oil leak hole 8, the amount of supply of lubricating oil can be adjusted easily.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. An oil control structure, comprising:

the oil-gas separation device comprises a base (14), wherein a main shaft (1) and a bearing (4) used for connecting the main shaft (1) are arranged in the base (14), an oil through hole (2) arranged along the axial direction is formed in the main shaft (1), an oil outlet hole (3) arranged along the circumferential direction is further formed in the main shaft (1), and the oil outlet hole (3) is communicated with the oil through hole (2);

the oil outlet hole (3) is arranged in the base (14), the oil outlet hole is arranged in the base, and the oil outlet hole is communicated with the oil outlet hole;

an annular flange (7) is arranged on the outer circumference of the annular wall of the blocking control piece, the annular flange (7) is positioned below the first oil leakage hole (6), a plurality of second oil leakage holes (8) are formed in the annular flange (7), and the lower parts of the second oil leakage holes (8) are communicated with the bearing (4);

the base (14) is also internally provided with a circulating oil path (9), the circulating oil path (9) is arranged below the blocking control element, and lubricating oil is suitable for flowing back into the circulating oil path (9) along the upper surface of the annular flange (7).

2. An oil control structure according to claim 1, characterized in that the upper surface of the annular flange (7) is an outwardly inclined ramp structure.

3. The oil control structure according to claim 1 or 2, wherein the oil blocking member is a split structure and comprises the annular flange (7) and an oil blocking ring (5), a groove is formed in the upper surface of the annular flange (7), the oil blocking ring (5) is clamped in the groove, and the first oil leakage hole (6) is formed in the oil blocking ring (5).

4. The oil control structure according to claim 1 or 2, wherein the first oil leak hole (6) and the oil outlet hole (3) are both disposed perpendicular to the axis of the main shaft (1), and the second oil leak hole (8) is disposed parallel to the axis of the main shaft (1).

5. The oil control structure according to claim 1 or 2, wherein a plurality of the first oil leakage holes (6) and the second oil leakage holes (8) are arranged at intervals, and the first oil leakage holes (6) and the second oil leakage holes (8) are arranged in a one-to-one correspondence.

6. The oil control structure according to claim 1 or 2, wherein a bearing locking block (10) is fixedly arranged on the upper surface of the inner ring of the bearing (4), the bearing locking block (10) is fixedly connected with the outer wall of the main shaft (1), and a communication hole (11) which penetrates through the bearing locking block (10) and is communicated with the oil outlet (3) is formed in the bearing locking block (10).

7. An oil control structure according to claim 6, characterized in that the annular inner wall of the stopper element is arranged with a clearance from the bearing locking block (10) and the clearance communicates to the bearing (4).

8. An oil control structure according to claim 1 or 2, characterized in that a bearing seat (12) is connected to the outer ring of the bearing (4), the annular flange (7) being provided on the bearing seat (12).

9. An oil control structure according to claim 8, wherein the annular flange (7) is provided with a mounting hole (13), and a fastener is inserted into the mounting hole (13) and fastened on the bearing seat (12) to connect the gear control member with the bearing seat (12).

10. A molecular pump comprising an oil control structure according to any one of claims 1 to 9.