CN115992847A

CN115992847A - Bearing leak-stopping heat sink

Info

Publication number: CN115992847A
Application number: CN202310168517.0A
Authority: CN
Inventors: 邓向东; 邓质
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-27
Filing date: 2023-02-27
Publication date: 2023-04-21

Abstract

The invention belongs to the technical field of bearings, and provides a bearing leakage-stopping cooling device, which comprises a main shaft, a bearing with an oil cover and an end cover plate, wherein one end of the main shaft extends outwards from the bearing, a gradual change type shell is arranged at one end of the main shaft, and stationary blades are arranged at the inner side of the gradual change type shell; the main shaft is positioned at the inner side of the gradually-deformed shell, and the periphery of one end which is continuously extended outwards relative to the stationary blade is provided with a moving blade with a rotating direction; because the invention adopts a non-contact sealing mode, the sealing is carried out by using a pressurizing and blowing sealing mode generated by the movable blades and the static blades, and stable air flow with certain air pressure is formed on the surface of the main shaft, so that the outflow of lubricating oil is prevented; as the directional air flow is added along the direction of the main shaft, the oil delivery amount of the oil thrower in the bearing to the bearing bush can be increased, and the friction between the oil thrower and the bearing bush can be effectively reduced, thereby obviously reducing the working temperature of the bearing.

Description

Bearing leak-stopping heat sink

Technical Field

The invention belongs to the technical field of bearings in electromechanical equipment, and particularly relates to a bearing leakage-stopping cooling device.

Background

In the manufacture of existing electromechanical designs, the rotating part is supported by various bearings, with a fluid bearing being a relatively common bearing consisting essentially of: the bearing comprises a bearing seat, a bearing cover, a cooler, a radial bearing bush, a thrust bearing bush, a journal, a thrust mirror plate (oil thrower disc, a thrust head), an oil collecting cover, an end cover plate and the like, wherein lubricating oil is required to ensure the normal operation of the bearing, and a gap is required between a rotating main shaft and a static bearing, so that the gap is required to be subjected to leakage-proof sealing, so that the lubricating oil in the bearing is prevented from flowing outwards from the gap between the main shaft and the bearing end cover plate, and the normal operation of the rotating electromechanical equipment is influenced.

The liquid bearing sealing device generally adopts a contact type sealing mode, namely, a flexible material such as wool felt is used for filling the gap between the main shaft of the moving part and the end cover plate of the fixed part. The sealing mode has the advantages of simple structure and convenient installation. However, when the electromechanical device works, the sealing wool felt rubs with the main shaft along with the rotation of the main shaft to generate high temperature, so that the wool felt is aged to lose elasticity, the friction loss further enlarges the gap between the main shaft and the wool felt, lubricating oil is easy to flow out from the gap, frequent maintenance is required, and the sanitation is always affected by oil overflow. In addition, when the oil leakage amount of the gap between the oil cover and the main shaft is large, the bearing bush in the bearing cannot be well lubricated, so that the temperature of the bearing is too high.

Therefore, the non-contact bearing sealing device with convenient installation and simple structure is designed and is a technical problem to be solved in the field.

Disclosure of Invention

The invention provides a bearing leakage-stopping cooling device, which aims to solve the problem of oil leakage caused by poor sealing when a main shaft of an existing liquid bearing rotates, has the characteristics of simplicity, high efficiency, durability and no need of maintenance, and has the effect of reducing the temperature of the bearing.

The invention discloses a bearing leakage-stopping cooling device, which comprises a main shaft, a bearing with an oil cover and an end cover plate, wherein one end of the main shaft extends outwards from the bearing, a gradual change shell is arranged at the end of the main shaft, and stationary blades are arranged at the inner side of the gradual change shell;

and the moving blades are arranged on the main shaft and are matched with the static blades to form pressurized air flow input into the bearing.

Optionally, the vane rotation direction is opposite to the rotor blade rotation direction.

Optionally, the clearance between the stator blade and the moving blade is 0.2-1mm.

Optionally, the gradual change shape shell structure is the hollow structure that the internal diameter gradually reduces.

Optionally, the small diameter head of the gradual change shell is fixedly connected with the round hole of the end cover plate, and the large diameter head is communicated with air.

Optionally, the moving blade is fixed on the main shaft in a welding or hoop mode.

Compared with the prior art, the invention has the beneficial technical effects that: firstly, the invention adopts a non-contact sealing mode, and uses a pressurizing and blowing sealing mode generated by the moving blades and the static blades to seal, and stable air flow with certain air pressure is formed on the surface of the main shaft, so that the simple, durable and efficient prevention of the outflow of lubricating oil is realized; and secondly, as the high-speed directional air flow is added along the direction of the main shaft, oil leakage of a gap between the oil cover and the main shaft can be prevented, the oil delivery amount of the oil thrower to the bearing bush is increased, the friction force between the oil thrower (the thrust head and the thrust mirror plate) and between the shaft neck and the radial bearing bush is effectively reduced, the friction heat generation is reduced, and meanwhile, the air flow also enhances the heat dissipation of the oil cover and the lubricating oil, so that the working temperature of the bearing is obviously reduced.

Drawings

FIG. 1 is a cross-sectional view of a bearing leak-stopping apparatus of the present invention;

FIG. 2 is an enlarged view of a portion of the area A of FIG. 1;

FIG. 3 is an enlarged view of a portion of region B of FIG. 1;

FIG. 4 is a schematic view of the interior of the graded housing of the present invention;

fig. 5 is a schematic end view of a spindle of the present invention.

In the figure: 1. a bearing; 2. a main shaft; 201. a rotor blade; 3. an oil cover; 4. an end cover plate; 5. a graded housing; 501. stationary blades; 6. oil slingers (thrust heads); 7. an axial thrust shoe; 8. wool felt; 9. radial thrust tiles; 10. a journal; 11. and a cooling device.

Detailed Description

The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. 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. Thus, a feature defining "a first", "a second", etc. may explicitly or implicitly include one or more such feature. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" means two or more, and the meaning of "a number" means one or more.

The invention will be described in detail below with reference to the drawings in connection with embodiments.

As shown in fig. 1-3, the invention provides a bearing leakage-stopping cooling device, which comprises a bearing 1 with a main shaft 2, an oil cover 3 and an end cover plate 4, wherein one end of the main shaft 2 extends outwards from the bearing 1, one end of the main shaft 2 extending outwards from the bearing 1 is provided with a gradual change-shaped shell 5, and the inner side of the gradual change-shaped shell 5 is provided with stationary blades 501; specifically, the shape, size and dimension of the gradually changing housing 5 are optionally but not limited to be arbitrarily set according to the kinds, weight, size and dimension of the bearing 1 and the main shaft 2, etc., and the main purpose thereof is to form a converging channel for converging the external air.

By way of example, as shown in fig. 2 and 4, the tapered housing 5 is preferably constructed as a hollow structure with a gradually decreasing inner diameter. The small diameter head of the gradual change type shell is aligned with a round hole (not labeled in the figure, the round hole is used for the spindle to pass through the end cover plate) of the end cover plate, and is fixed on the end cover plate, for example, the small diameter head is fixed by screw connection. The large diameter head is communicated with air. In this way, an air collector resembling a funnel is formed.

The main shaft 2 is located inside the gradual-change-shaped casing 5, and the periphery of one end which extends outwards relative to the stationary blades 501 is provided with a rotary moving blade 201 which is used for being matched with the stationary blades 501 to form a pressurized air flow which is input into the bearing 1.

Specifically, the vane 501 rotates in the opposite direction to the rotor blade 201. The rotor blade 201 rotates to press the air of the force-bearing surface in a bevelled manner to move in a direction perpendicular to the surface of the rotor blade, thereby creating a negative pressure zone at the home position, and forming an air flow. Due to the action of inertial centrifugal force, air is thrown toward the edge of the rotor blade 201. The stator vanes 501 redirect the air flow generated by the rotor blades 201, so that the air flows into the small-diameter end of the gradually-changed casing 5 more smoothly after being input, and the formed increased air flow is input into the bearing 1 along the main shaft surface.

The advantage of this embodiment is that by means of the cooperation of the moving blades 201 and the stationary blades 501 a stable and directed air flow is created, which achieves that the lubrication fluid in the bearing 1 is prevented from flowing out.

The advantage of this embodiment is that, the vane 501 rotates to the opposite direction to the vane 201, and can effectively convert the ineffective annular airflow generated by the vane 201 into effective axial airflow and gas pressure potential energy, so as to form stable air flow blowing into the bearing axially, so as to realize the blocking of lubricating fluid.

In one embodiment, the elimination of the fleece blanket 8 at the end cap 4 can achieve a friction-free seal of the spindle seal.

As shown in FIG. 2, in a preferred embodiment, the clearance between the stator vanes 501 and the rotor blades 201 is 0.2 to 1mm. So set up, on the one hand can avoid the interference between movable vane and the stator blade, on the other hand, can further guarantee the stability of air current and compress the efficiency of gas, improve the shutoff effect to the lubricating liquid.

Example 1

When the bearing runs at a high speed, the moving blades 201 form a high-speed air flow blowing to the bearing 1, then the air flow is converged under the guiding action of the gradual-change-shaped shell 5, and then stable air flow with certain air pressure blowing to the bearing 1 along the surface of the main shaft is formed through the speed reduction and the guiding of the stationary blades 501, so that the sealing of liquid leakage in the gap between the main shaft 2 and the end cover plate 4 is realized.

Example two

Referring to fig. 1, arrows illustrate the flow direction of the lubricant. The lubricant in the cooling device 11 enters the interior of the thrust bearing through a conduit with the oil slinger 6. The oil thrower 6 brings oil to a high position, is led to between the thrust collar 7 and the thrust head 6 and between the radial collar 9 and the journal 10 through an oil cover and an oil duct, and along with the high-speed rotation of the main shaft 2, an oil film is generated between the part of the main shaft 2, which is positioned between the journal 10 and the radial collar 9 and between the thrust collar 7 and the thrust head 6, so that the direct friction of solids is avoided, the friction resistance is greatly reduced, the lubricating oil plays a role of reducing friction heat and improving efficiency, and meanwhile, the lubricating oil also plays a role of taking away heat and reducing the collar temperature, and the oil absorbing the friction heat flows to the oil thrower for recycling after being cooled by a cooling device. . At this time, stable air flow with certain air pressure generated by matching the moving blades 201 and the static blades 501 flows along the main shaft 2, when the air flow blows to the gap between the main shaft 2 and the oil cover 3, oil leakage in the gap between the oil cover 1 and the main shaft 2 is prevented under the action of the air flow, the amount of lubricating liquid conveyed to the axial thrust bearing 7 by the oil thrower 6 is increased, heat on the radial thrust bearing 9 is rapidly taken away, and meanwhile, the friction force between the main shaft 2 and the radial thrust bearing 9 is reduced, so that the aim of remarkably reducing the internal temperature of the bearing 1 is fulfilled.

The bearing leakage-stopping device provided by the invention is not only suitable for the electromechanical equipment of the horizontal bearing, but also suitable for the horizontal water turbine unit. Meanwhile, for the water turbine or the motor with the vertically arranged main shaft, the technical scheme provided by the invention can also realize the leak-proof cooling of the bearing under the condition.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The utility model provides a bearing leak-stopping heat sink, includes main shaft (2), has bearing (1) of oil cover (3) and end cover board (4), main shaft (2) one end outwards extends from in bearing (1), its characterized in that, main shaft (2) outwards extend one end from in bearing (1) and are equipped with gradual change shape shell (5), gradual change shape shell (5) inboard is equipped with stator blade (501);

and a rotor blade (201) provided on the main shaft (2) and configured to cooperate with the stator blade (501) to form a pressurized air flow that is input into the bearing (1).

2. The bearing leakage-stopping cooling device according to claim 1, wherein the stator blades (501) are rotated in the opposite direction to the rotor blades (201).

3. The bearing leakage-stopping cooling device according to claim 2, wherein the clearance between the stator blades (501) and the rotor blades (201) is 0.2-1mm.

4. The bearing leakage-stopping cooling device according to claim 1, wherein the gradual-change-shaped shell (5) is a hollow structure with gradually reduced inner diameter.

5. The bearing leakage-stopping cooling device according to claim 4, wherein the small diameter head of the gradual change-shaped shell (5) is fixedly connected with the round hole of the end cover plate, and the large diameter head is communicated with air.

6. The bearing leakage-stopping cooling device according to claim 1, wherein the moving blade (201) is fixed on the main shaft (2) by welding or hooping.