Bearing body structure for frequently starting vertical high-temperature molten salt pump
By adopting a dual bearing structure and a dual cooling system in the high-temperature molten salt pump bearing, it provides additional preload and effective lubrication, and stops the supply of cooling water in low-load and low-temperature environments, the load problem of bearings at the moment of starting and the energy consumption problem of cooling system is solved, and the reliability and energy-saving effect of bearings are achieved.
Patent Information
- Application Number
- CN202510098154.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-05-06
AI Technical Summary
The axial load of the high-temperature molten salt pump bearing is too small at the moment of starting, resulting in slippage and wear, and the deep groove ball bearing lacks effective lubrication at the moment of starting, and the dual cooling system is difficult to stop the supply of cooling water in a low-load and low-temperature environment, resulting in high energy consumption.
The dual bearing structure and dual cooling system are adopted, including thrust bearings and deep groove ball bearings, which provide additional preloading force through butterfly springs and corrugated springs to ensure that the bearing is sufficiently lubricated at the moment of starting; the cooling coil is cooled by fans and cooling coils, and the supply of cooling water can be stopped under low load and low temperature environments.
It effectively solves the problem of slippage and wear caused by too small axial load at the moment of starting, ensures effective lubrication of deep groove ball bearings, and realizes the energy-saving and water-saving effect of the dual cooling system in low load and low temperature environments.
Smart Images
Figure CN119934068A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to a high-temperature molten salt pump bearing body structure, and in particular to a vertical high-temperature molten salt pump bearing body structure for frequent starting, which solves the problem of slipping and wear of the bearing due to too small axial load at the moment of starting, the problem of lack of effective lubrication of the upper deep groove ball bearing at the moment of starting, and a dual cooling system that can stop the supply of cooling water in the cooling coil under low load and low temperature environment. Background Art
[0002] The molten salt pump is a pump specially used to transport high-temperature binary or ternary molten salt. It is used to transport high-temperature nitrates and nitrites, and is also widely used in chemical processes such as melamine, salt making, alkali making and urea. The temperature of the transported medium is usually between 300℃ and 600℃. The device is an important equipment in solar thermal power generation, molten salt energy storage, and molten salt reactors. The power generation of solar thermal power generation is always changing due to the influence of many factors such as light intensity, radiation intensity, sunshine duration, and cloud cover. As the main equipment for transporting heat storage and transfer media in solar power generation systems, molten salt pumps need to adjust the operating conditions at all times according to system requirements. They have the characteristics of wide operating working area and frequent start and stop. As an important part supporting the rotor components of the molten salt pump, the bearing body of the molten salt pump has complex and changeable working loads, short bearing life, large vibration, and high energy consumption during actual operation. Summary of the invention
[0003] In view of the above problems, the main purpose of the present invention is to provide a bearing body structure for frequently started vertical high-temperature molten salt pumps, which solves the problem of slipping and wear of the bearing caused by too small axial load at the moment of starting, the problem of lack of effective lubrication of the upper deep groove ball bearing at the moment of starting, and the dual cooling system can stop the supply of cooling water in the cooling coil under low load and low temperature environment.
[0004] The present invention solves the above technical problems through the following technical solutions: a bearing body structure for frequently starting a vertical high-temperature molten salt pump, the bearing body structure for frequently starting a vertical high-temperature molten salt pump comprising: a double bearing structure and a double cooling structure; the double bearing structure comprises a thrust bearing and a deep groove ball bearing, and the double cooling structure comprises a fan and a cooling coil.
[0005] The thrust bearing and the deep groove ball bearing are both interference connected with the bearing support. The thrust bearing and the deep groove ball bearing isolate the stator and rotor parts and transmit the load; the deep groove ball bearing is installed in the bearing cover.
[0006] The cooling coil is fixed on the bearing body, and cooling water flows inside the cooling coil; the fan is arranged above the bearing cover, and the bearing cover is fixed together with the bearing body.
[0007] In a specific implementation example of the present invention, the bearing support is fixedly connected to the adjusting nut, the adjusting nut is threadedly connected to the shaft and torque is transmitted through a key, and the fan is fixedly connected to the adjusting nut; the bearing support, the adjusting nut and the fan rotate with the shaft; a butterfly spring is arranged on the contact surface of the thrust bearing and the bearing body, and a wave spring is arranged between the deep groove ball bearing and the bearing cover.
[0008] In a specific implementation example of the present invention, the bearing cover and the bearing body are fixed by fixing bolts, and the lubricating oil is sealed by an O-ring.
[0009] In a specific implementation example of the present invention, the cooling coil is fixed to the bearing body by welding.
[0010] In a specific implementation example of the present invention, the fan is equipped with a fan cover, and the fan cover is fixedly connected to the bearing body by butterfly bolts.
[0011] In a specific implementation example of the present invention, when the shaft rotates, the bearing support, the fan and the adjusting nut are driven to rotate together, and an oblique oil supply hole and a trapezoidal oil collecting groove are provided on the bearing support.
[0012] In a specific implementation example of the present invention, a butterfly spring is arranged at the lower part of the thrust bearing, and a wave spring is arranged at the upper part of the deep groove ball bearing.
[0013] In a specific implementation example of the present invention, the adjusting nut is fixedly connected to the bearing support via a locking screw, and the shaft is fixedly connected to the bearing support via a key.
[0014] In a specific implementation example of the present invention, the fan is fixedly connected to the adjusting nut via a clamping ring.
[0015] The positive progressive effect of the present invention is that the bearing body structure for frequently started vertical high-temperature molten salt pumps provided by the present invention has the following advantages compared with common technologies: the present invention solves the problem of slipping and wear caused by too small axial load on the bearing at the moment of starting, the problem of lack of effective lubrication of the upper deep groove ball bearing at the moment of starting, and the dual cooling system can stop the supply of cooling water in the cooling coil under low load and low temperature environment to achieve the purpose of energy saving and water saving. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the present invention.
[0017] Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram in the middle.
[0018] Figure 3 For the present invention Figure 1 A partial enlarged schematic diagram of point B in the middle.
[0019] The following are the names corresponding to the labels in the present invention:
[0020] Fan cover 1, fan 2, adjusting nut 3, bearing support 4, bearing cover 5, bearing body 6, thrust bearing 7, cooling coil 8, shaft 9, retaining ring 10, locking screw 11, key 12, wave spring 13, fixing bolt 14, butterfly bolt 15, O-ring 16, deep groove ball bearing 17, butterfly spring 18. DETAILED DESCRIPTION
[0021] Preferred embodiments of the present invention are given below in conjunction with the accompanying drawings to illustrate the technical solutions of the present invention in detail.
[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention, Figure 2 For the present invention Figure 1 A partial enlarged schematic diagram, Figure 3 For the present invention Figure 1 The enlarged schematic diagram of the part B in the middle is as follows: Figure 1-3 As shown: The present invention proposes a bearing body structure for a frequently started vertical high-temperature molten salt pump, which includes a fan cover 1, a fan 2, an adjusting nut 3, a bearing support 4, a bearing cover 5, a bearing body 6, a thrust bearing 7, a cooling coil 8, a shaft 9, a retaining ring 10, a locking screw 11, a key 12, a wave spring 13, a fixing bolt 14, a butterfly bolt 15, an O-ring 16, a deep groove ball bearing 17, and a butterfly spring 18.
[0023] In the present invention, the bearing support 4 and the adjusting nut 3 are fixedly connected together by a locking screw 11, the adjusting nut 3 and the shaft 9 are threadedly connected, and the torque is transmitted through a key 12, and the fan 2 and the adjusting nut 3 are connected and fixed by a retaining ring 10. The above parts are rotating parts and rotate with the shaft 9. The thrust bearing 7 and the deep groove ball bearing 17 are interference-connected with the bearing support 4 to isolate the stator and rotor parts and transmit the load. The deep groove ball bearing 17 is installed in the bearing cover 5 and positioned by a wave spring 13. The thrust bearing 7 is installed in the bearing body 6, and a disc spring 18 is installed between the two. The cooling coil 8 is welded on the bearing body 6 and cooling water is passed inside. The bearing cover 5 and the bearing body 6 are fixed by fixing bolts 14, and the lubricating oil is sealed with an O-ring 16 to form a closed lubricating oil chamber. The fan cover 1 and the bearing body 6 are fixed by butterfly bolts 15 for easy disassembly.
[0024] In the present invention, a butterfly spring 18 is arranged on the contact surface of the thrust bearing 7 and the bearing body 6, and a wave spring 13 is arranged between the deep groove ball bearing 17 and the bearing cover 5. When the operating conditions of the equipment change and the bearing force is reduced and cannot meet the requirements of the minimum operating load of the bearing, the butterfly spring 18 and the wave spring 13 will provide additional preload to meet the needs of normal operation of the bearing, prevent the bearing from slipping and wearing, and improve the reliability of the bearing operation and the ability to adapt to complex working conditions.
[0025] When the central shaft 9 of the present invention rotates, it drives the bearing support 4, the fan 2, and the adjusting nut 3 to rotate together. The inclined oil supply hole on the bearing support 4 draws lubricating oil from the oil chamber under the action of centrifugal force, and provides lubricating oil and circulating cooling for the thrust bearing and the deep groove ball bearing; a trapezoidal oil collecting groove is provided on the bearing support 4, and lubricating oil is stored inside. When the lubricating oil in the oil supply hole has not reached the bearing at the moment of rotor starting, the stored oil in the trapezoidal groove provides lubrication for the bearing at the moment of starting, thereby reducing bearing wear and increasing bearing life.
[0026] In the present invention, the heat generated by the bearing during operation is transferred to the cooling coil 8 and the bearing body 6 by the circulation of lubricating oil, and the heat is taken away by the heat exchange between the cooling water and the fan 2 to ensure the thermal balance of the bearing during operation. When the molten salt pump is running at a low speed or the ambient temperature is lower than 0°C, the supply of cooling water in the cooling coil can be stopped, and the bearing can continuously maintain thermal balance by the fan 2 to meet the operation requirements and achieve the effect of energy saving and water saving. The fan cover 1 is fixed to the bearing body 6 by a butterfly bolt 15. The butterfly bolt 15 can be manually disassembled and tightened due to its special structure, which is convenient for on-site maintenance.
[0027] The present invention solves the problem of bearing slipping and wear caused by too small axial load at the moment of starting, and the problem of lack of effective lubrication of the upper deep groove ball bearing at the moment of starting. The dual cooling system can stop the supply of cooling water in the cooling coil under low load and low temperature environment, thereby achieving the purpose of energy saving and water saving.
[0028] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.
Claims
1. A bearing structure for a vertical high-temperature molten salt pump that is frequently started, characterized in that: The bearing body structure for frequently starting a vertical high-temperature molten salt pump includes: a double bearing structure and a double cooling structure; the double bearing structure includes a thrust bearing and a deep groove ball bearing, and the double cooling structure includes a fan and a cooling coil; The thrust bearing and deep groove ball bearing are both interference-connected with the bearing support. The thrust bearing and deep groove ball bearing isolate the stator and rotor parts and transmit the load. The deep groove ball bearing is installed in the bearing cover. The cooling coil is fixed on the bearing body, and cooling water flows inside the cooling coil; the fan is arranged above the bearing cover, and the bearing cover is fixed together with the bearing body.
2. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 1 is characterized in that: The bearing support is fixedly connected with the adjusting nut, the adjusting nut is connected with the shaft through threads and transmits torque through keys, and the fan is fixedly connected with the adjusting nut; the bearing support, the adjusting nut and the fan rotate with the shaft; a butterfly spring is arranged on the contact surface between the thrust bearing and the bearing body, and a wave spring is arranged between the deep groove ball bearing and the bearing cover.
3. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 2 is characterized in that: The bearing cover is fixed to the bearing body by fixing bolts and the lubricating oil is sealed by an O-ring.
4. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 1 is characterized in that: The cooling coil is fixed to the bearing body by welding.
5. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 1 is characterized in that: The fan is equipped with a fan cover, and the fan cover is fixedly connected to the bearing body by butterfly bolts.
6. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 2 is characterized in that: When the shaft rotates, the bearing support, the fan and the adjusting nut are driven to rotate together. The bearing support is provided with an oblique oil supply hole and a trapezoidal oil collecting groove.
7. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 1 is characterized in that: A butterfly spring is arranged at the lower part of the thrust bearing, and a wave spring is arranged at the upper part of the deep groove ball bearing.
8. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 2 is characterized in that: The adjusting nut is fixedly connected to the bearing support via a locking screw, and the shaft is fixedly connected to the bearing support via a key.
9. The bearing body structure for frequently starting a vertical high-temperature molten salt pump according to claim 8, characterized in that: The fan is fixedly connected to the adjusting nut via a snap ring.