Novel rotary machinery guide bearing cooling structure
By designing a new cooling structure in rotating mechanical guide bearings, including spindles, guide bearing shells, bearing oil grooves and stirring devices, the problem of low cooling reliability of guide bearings is solved, and more efficient cooling effect and lower maintenance workload are achieved, ensuring the safe and stable operation of the equipment.
Patent Information
- Application Number
- CN202421949011.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-13
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-13
AI Technical Summary
The cooling reliability of rotary mechanical guide bearings is low, resulting in oil temperature and increased wax temperature, which may cause tile fever accidents. The traditional cooling structure is complex and the maintenance workload is large.
A new type of rotary mechanical guide bearing cooling structure is designed, including spindle, guide bearing shell, bearing oil tank and agitating device. The oil supply pipe and the oil return pipe are arranged at the bottom of the bearing oil tank through an equidistant ring. The agitating device is arranged at the bottom of the bearing oil tank through an equidistant ring. The cold oil is impacted on the agitating device by using the oil supply pressure to make the cold oil and hot oil mix evenly.
It effectively improves the cooling effect of the guide bearing, reduces oil temperature and watt temperature, reduces maintenance workload, and improves the safe and stable operation ability of the equipment.
Smart Images
Figure CN222950107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of water conservancy and hydropower engineering, in particular to a novel cooling structure for a guide bearing of a rotating machine. Background Art
[0002] The stability of the guide bearings of rotating machinery plays a vital role in the safe and stable operation of the equipment. When water pumps, water pump turbine units and conventional mixed flow units are in operation, the guide bearing oil temperature and bearing temperature rise rapidly and need to be cooled in time. For guide bearings with external oil coolers, the traditional cooling oil supply pipe is arranged in the inner oil tank to cool the bearing; the outer oil tank is connected to the inner oil tank to cool the lubricating oil in the oil tank while cooling the bearing. It is characterized by a complex structure, an additional cooling oil supply pipe needs to be arranged inside the bearing, the reliability is relatively low, and the maintenance workload is large. If the lubricating oil in the bearing does not flow smoothly or the cooling oil supply pipe is not arranged reasonably, the bearing oil temperature and bearing temperature will rise, and in severe cases, even a bearing burning accident may occur.
[0003] As more and more attention is paid to the operating stability of running equipment, the reliability of guide bearing cooling and operation and maintenance issues need to be solved. Utility Model Content
[0004] The utility model aims to provide a novel cooling structure for a guide bearing of a rotating machine which can improve cooling reliability and cooling effect.
[0005] In order to achieve the above object, the utility model is implemented through the following technical solutions:
[0006] A novel cooling structure for guide bearings of a rotating machine comprises a main shaft and guide bearing shells on the peripheral side of the main shaft, wherein the main shaft is arranged at the center of a bearing oil groove, an oil supply pipe is arranged at the bottom of the bearing oil groove, stirring devices are arranged equidistantly around the bottom of the bearing oil groove, the lubricating oil in the bearing oil groove immerses the guide bearing shells, the outlet of the oil supply pipe faces one of the stirring devices, and an oil return pipe is arranged on the opposite side of the oil supply pipe.
[0007] Furthermore, the stirring device consists of a top plate and two side plates.
[0008] Compared with the prior art, the utility model has the following advantages:
[0009] The utility model discloses a novel cooling structure for guide bearings of rotating machinery, which has a reasonable structural design, is free of any lossy parts, and does not require additional maintenance work in later operation. It is suitable for water pumps, water pump turbines and mixed flow turbines with different speeds. Through the special stirring device design and optimization of the flow direction of the lubricating oil in the bearing oil tank, the cooling effect of the guide bearing is effectively improved, providing favorable conditions for the continuous, safe and stable operation of the unit. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1It is a structural schematic diagram of the utility model.
[0011] Figure 2 It is a schematic diagram of the distribution of the stirring device of the utility model.
[0012] Figure numerals: 1. stirring device; 2. oil supply pipe; 3. oil return pipe; 4. bearing oil groove; 5. guide bearing; 6. main shaft; 7. side plate; 8. top plate; 9. bearing oil level. DETAILED DESCRIPTION
[0013] The embodiments of the present utility model are described in further detail below in conjunction with the accompanying drawings.
[0014] like Figure 1 As shown, a novel guide bearing cooling structure of a rotary machine includes a main shaft 6 and a guide bearing bush 5 around the main shaft 6. The main shaft 6 is arranged at the center of a bearing oil groove 4. A plurality of stirring devices 1 are arranged at equal distances around the bottom of the bearing oil groove 4, such as Figure 2 As shown, the stirring device 1 is composed of a top plate 8 and two side plates 7. The outer edge and inner edge of the top plate 8 are arc-shaped, that is, they are parallel to the outer edge and inner edge of the bottom of the bearing oil groove 4. An oil supply pipe 2 is arranged at the bottom of the bearing oil groove 4. The outlet of the oil supply pipe 2 is directly facing one of the stirring devices 1. The cold oil is impacted on the top plate 8 of the stirring device 1 by the oil supply pressure, so that the cold oil is mixed with the hot oil in the bearing oil groove 4 as soon as possible; the cold and hot lubricating oils in the bearing oil groove 4 are mixed evenly under the action of several stirring devices 1; further, an oil return pipe 3 is arranged on the opposite side of the oil supply pipe 2, and the inlet of the oil return pipe 3 is arranged in a 90° elbow, and the elbow extends out of the stirring device 1 to reduce the resistance of the oil return port. The lubricating oil in the bearing oil groove 4 is immersed in the guide bearing 5.
[0015] The number of the stirring devices 1 is set according to the different sizes of the main shaft 6 .
[0016] The working principle of the utility model is as follows: when the unit is running, as the main shaft 6 rotates, the oil film between the guide bearing 5 and the main shaft 6 generates heat through high-speed friction, and part of the heat is transferred to the lubricating oil in the bearing oil groove 4, and the other part is transferred to the guide bearing 5; the rotation of the main shaft 6 drives the lubricating oil in the bearing oil groove 4 to rotate, and the cold and hot lubricating oils are further mixed evenly under the action of a plurality of stirring devices 1 at the bottom of the bearing oil groove 4; the setting of the return oil pipe 3 ensures that the cold oil is fully utilized for cooling, and the setting of the 90° elbow at the inlet of the return oil pipe 3 and extending outward from the stirring device 1 ensures that the resistance of the return oil port is reduced and the return oil is smoother; the guide bearing 5 is completely immersed in the lubricating oil in the bearing oil groove 4, ensuring that the bearing oil level is always higher than the top of the guide bearing 5, and the lubricating oil in the bearing oil groove 4 is cooled, thereby indirectly cooling the guide bearing 5 immersed in the lubricating oil.
[0017] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.
Claims
1. A novel guide bearing cooling structure for a rotating machine, comprising a main shaft and a guide bearing bushing on the peripheral side of the main shaft, wherein the main shaft is arranged at the center of the bearing oil groove, and an oil supply pipe is arranged at the bottom of the bearing oil groove, characterized in that: The bottom of the bearing oil tank is equidistantly provided with stirring devices, the lubricating oil in the bearing oil tank submerges the guide bearing bush, the outlet of the oil supply pipe faces one of the stirring devices, and an oil return pipe is provided on the opposite side of the oil supply pipe.
2. A novel rotating machinery guide bearing cooling structure according to claim 1, characterized in that: The stirring device consists of a top plate and two side plates.