An oil leakage prevention structure for large vertical bearing oil baffle pipe area

Abstract

The utility model discloses a kind of for large vertical bearing oil baffle pipe area's oil leakage prevention structure, including thrust head, the middle part of the thrust head is shaped with the central through-hole for installing bearing, the lower part inner side wall of central through-hole is shaped with inner annular groove, the bottom end of inner annular groove extends the bottom end of thrust head;The inner annular groove is inserted with oil baffle pipe, the outer side wall of oil baffle pipe is close to the inner side wall of inner annular groove, the bottom end inner side wall of inner annular groove is shaped with bottom inner annular groove, the outer side wall on the place of bottom inner annular groove is fixed with the radial extension of oil-stable plate to oil baffle pipe, oil-stable plate is inserted in bottom inner annular groove outside, and the top surface of its outside is close to the top surface of bottom inner annular groove;It simple structure, low cost, easy to install, safe and reliable, can effectively stabilize oil baffle pipe area oil level, reduce leakage probability.

Description

Technical Field

[0001] This utility model relates to the field of sliding bearing technology, and more specifically to an oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing. Background Technology

[0002] Most commonly used sealing structures for preventing oil leakage in the oil baffle area of ​​vertical bearings adopt floating seal structures. These structures are simple in structure, but their wall thickness is limited by the bearing space, which restricts their specifications. If made into a large diameter, they often deform severely, affecting the seal. Moreover, the sealing ring material needs to be customized, which is costly. Therefore, traditional floating seal structures are only suitable for small and medium-sized vertical bearings. For large vertical bearings, the density effect of such floating seals is limited. The oil inside can leak directly into the motor through the opening of the oil baffle along the shaft, posing a great threat to safe operation, polluting the motor, making cleaning difficult, and resulting in extremely high operating costs.

[0003] It is generally believed that oil is thrown out of the oil baffle pipe because the oil flow in the pipe area is in a turbulent state, which can be determined by the Reynolds number Re. When Re < 1000~1300, it is laminar flow. Re can be calculated by the rotation speed, gap, depth of immersion of the rotating part in the oil, and kinematic viscosity of the oil. Based on the importance of sealing the oil baffle pipe area and the analysis of the causes of oil leakage, it is necessary to improve the oil baffle pipe area to reduce the probability of oil leakage. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an oil leakage prevention structure for the oil baffle tube area of ​​large vertical bearings. It has a simple structure, low cost, convenient installation, safety and reliability, and can effectively stabilize the oil level in the oil baffle tube area and reduce the probability of leakage.

[0005] The solution of this utility model to the aforementioned technical problem is:

[0006] An oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing includes a thrust head, wherein a central through hole for mounting the bearing is formed in the middle of the thrust head, and an inner annular groove is formed on the lower inner sidewall of the central through hole, with the bottom end of the inner annular groove extending out of the bottom end of the thrust head.

[0007] An oil baffle tube is inserted into the inner annular groove. The outer side wall of the oil baffle tube is close to the inner side wall of the inner annular groove. A bottom inner annular groove is formed on the bottom inner side wall of the inner annular groove. A radially extending oil stabilizing plate is fixed on the outer side wall of the oil baffle tube facing the bottom inner annular groove. The outer side of the oil stabilizing plate is inserted into the bottom inner annular groove, and its outer top surface is close to the top surface of the bottom inner annular groove.

[0008] The upper part of the outer wall of the bottom inner annular groove is formed with a plurality of first oil guide holes extending obliquely outward and upward, and the outer end of the first oil guide hole extends outward from the outer wall of the thrust head.

[0009] The inner wall of the top of the inner annular groove is formed with an upper inner annular groove, and the upper inner wall of the upper inner annular groove is formed with a plurality of second oil guide holes extending outward and upward at an angle, with the outer end of the second oil guide holes extending outward from the outer wall of the thrust head.

[0010] The outermost wall of the top of the oil baffle is close to the upper inner annular groove.

[0011] Multiple horizontal connecting plates are welded and fixed on the outer side wall of the oil baffle pipe near the inner annular groove. The oil stabilizing plate is pressed against the top surface of all the horizontal connecting plates and fixed by bolts. The oil stabilizing plate is an annular plate or an annular plate formed by splicing multiple arc plates. Its inner side wall is close to or tightly attached to the outer side wall of the oil baffle pipe.

[0012] The outstanding effect of this utility model is:

[0013] Its oil stabilizing plate can block the lubricating oil below, making the lubricating oil above relatively stable. As the thrust head rotates, the oil below the pressure stabilizing plate is thrown out through the first oil guide hole from the outer wall of the thrust head, which basically does not affect the oil above the pressure stabilizing plate, ensuring that the oil above is in a stable laminar flow state. At the same time, the second oil guide hole can throw out the oil coming out along the top of the oil baffle pipe through the second oil guide hole, so as to ensure that the oil is not easy to overflow and achieve the effect of reducing oil leakage. Attached Figure Description

[0014] Figure 1 This is a partial structural schematic diagram of the present invention;

[0015] Figure 2 This is a partial structural schematic diagram of the thrust head of this utility model;

[0016] Figure 3 This is a partial structural diagram of the oil baffle. Detailed Implementation

[0017] For example, see below. Figures 1 to 3 As shown, an oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing includes a thrust head 10. The thrust head 10 has a central through hole 11 formed in the middle for mounting the bearing. An inner annular groove 12 is formed on the lower inner sidewall of the central through hole 11. The bottom end of the inner annular groove 12 extends out of the bottom end of the thrust head 10. The inner sidewall of the inner annular groove 12 is a frustum wall with a smaller inner diameter at the top and a larger inner diameter at the bottom.

[0018] An oil baffle tube 20 is inserted into the inner annular groove 12. The outer side wall of the oil baffle tube 20 is close to the inner side wall of the inner annular groove 12. A bottom inner annular groove 13 is formed on the bottom inner side wall of the inner annular groove 12. A radially extending oil stabilizing plate 21 is fixed on the outer side wall of the oil baffle tube 20 facing the bottom inner annular groove 13. The outer side of the oil stabilizing plate 21 is inserted into the bottom inner annular groove 13, and its outer top surface is close to the top surface of the bottom inner annular groove 13.

[0019] The upper part of the outer side wall of the bottom inner annular groove 13 is formed with a plurality of first oil guide holes 1 extending obliquely outward and upward, and the outer end of the first oil guide hole 1 extends outward from the outer side wall of the thrust head 10.

[0020] The inner wall of the inner annular groove 12 is formed with an upper inner annular groove 14. The upper inner annular groove 14 is formed with a plurality of second oil guide holes 2 extending outward and upward at an angle on the upper inner wall. The outer end of the second oil guide hole 2 extends outward from the outer wall of the thrust head 10.

[0021] The top outer wall of the oil baffle 20 is close to the upper inner annular groove 14.

[0022] Multiple horizontal connecting plates 22 are welded and fixed to the outer wall of the oil baffle pipe 20 near the inner annular groove 12. All horizontal connecting plates 22 are evenly distributed on the outer wall of the oil baffle pipe 20 with the central axis of the oil baffle pipe 20 as the center. The oil stabilizing plate 21 is pressed against the top surface of all horizontal connecting plates 22 and fixedly connected by bolts. The oil stabilizing plate 21 can be a whole annular plate or a ring plate formed by splicing multiple arc plates. Its inner wall is close to or tightly attached to the outer wall of the oil baffle pipe 20. In the case of a ring plate formed by splicing multiple arc plates, the arc plates are fixedly connected to the top surface of the corresponding horizontal connecting plate 22 by bolts, and the ends of two adjacent arc plates are tightly attached to each other.

[0023] Furthermore, the gap δ between the top surface of the oil stabilizing plate 21 and the top surface of the bottom inner annular groove 13 is 1.5 to 2.5 mm, and in this embodiment it is 2 mm. This distance is just enough to prevent the oil below the oil stabilizing plate 21 from rising, but it does not separate the oil below from the oil above the oil stabilizing plate 21.

[0024] The parallelism between the top surface of the bottom inner annular groove 13 and the top surface of the thrust bearing 30 pressed against the bottom of the thrust head 10 is no more than 0.1 mm.

[0025] The oil stabilizing plate 21 is made of 3240 insulating board.

[0026] In this embodiment, when working, the thrust head 10 rotates and drives the lubricating oil to rotate as well. The pressure difference generated by the rotation causes the lubricating oil to be quickly thrown out from the side wall of the oil stabilizing plate 21 along the bottom inner annular groove 13 from the first oil guide hole 1. Due to the function of the oil stabilizing plate 21, the oil surface above it is relatively stable, ensuring that the oil above it is in a laminar flow state.

[0027] The inner wall of the inner annular groove 12 is a frustum wall with a smaller inner diameter at the top and a larger inner diameter at the bottom, which causes the oil to be pressed down under the action of centrifugal force, preventing the oil from climbing upwards.

[0028] Meanwhile, an upper inner annular groove 14 is formed on the top inner wall of the inner annular groove 12, and a plurality of second oil guide holes 2 extending outward and upward are formed on the top inner wall of the upper inner annular groove 14. This arrangement allows a small amount of lubricating oil to climb up along the inner wall of the thrust head 10 and be thrown back into the oil tank through the second oil guide holes 2 by centrifugal force.

[0029] Through the above triple action, the oil level in the oil baffle area is stable, greatly reducing the possibility of oil leakage and preventing the generation of oil mist. Even if there is negative pressure in the motor, there is no need to worry about the possibility of oil mist being sucked into the motor.

[0030] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A leak-proof structure for the oil baffle area of ​​a large vertical bearing, comprising a thrust head (10), characterized in that: The thrust head (10) has a central through hole (11) for mounting a bearing in the middle part, and an inner annular groove (12) is formed on the lower inner side wall of the central through hole (11), with the bottom end of the inner annular groove (12) extending out of the bottom end of the thrust head (10). An oil baffle tube (20) is inserted into the inner annular groove (12). The outer side wall of the oil baffle tube (20) is close to the inner side wall of the inner annular groove (12). A bottom inner annular groove (13) is formed on the bottom inner side wall of the inner annular groove (12). A radially extending oil stabilizing plate (21) is fixed on the outer side wall of the oil baffle tube (20) facing the bottom inner annular groove (13). The outer side of the oil stabilizing plate (21) is inserted into the bottom inner annular groove (13), and its outer top surface is close to the top surface of the bottom inner annular groove (13). The upper part of the outer side wall of the bottom inner annular groove (13) is formed with a plurality of first oil guide holes (1) extending obliquely outward and upward, and the outer end of the first oil guide hole (1) extends outward from the outer side wall of the thrust head (10).

2. The oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing according to claim 1, characterized in that: The inner wall of the inner annular groove (12) is formed with an upper inner annular groove (14), and the inner wall of the upper inner annular groove (14) is formed with a plurality of second oil guide holes (2) extending outward and upward at an angle. The outer end of the second oil guide hole (2) extends outward from the outer wall of the thrust head (10).

3. The oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing according to claim 2, characterized in that: The top outer wall of the oil baffle (20) is close to the upper inner annular groove (14).

4. The oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing according to claim 1, characterized in that: Multiple horizontal connecting plates (22) are welded and fixed on the outer side wall of the oil baffle (20) near the inner annular groove (12). The oil stabilizing plate (21) is pressed against the top surface of all the horizontal connecting plates (22) and fixedly connected by bolts. The oil stabilizing plate (21) is an annular plate or an annular plate formed by splicing multiple arc plates. Its inner side wall is close to or tightly attached to the outer side wall of the oil baffle (20).

5. The oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing according to claim 1, characterized in that: The gap δ between the top surface of the oil stabilizing plate (21) and the top surface of the bottom inner annular groove (13) is 1.5 to 2.5 mm.

6. The oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing according to claim 1, characterized in that: The parallelism between the top surface of the bottom inner annular groove (13) and the top surface of the thrust bearing (30) pressed against the bottom of the thrust head (10) is no greater than 0.1 mm.

7. The oil leakage prevention structure for the oil baffle area of ​​a large vertical bearing according to claim 1, characterized in that: The oil stabilizer plate (21) is made of 3240 insulating board.

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