CN110735808B - Pulsating flow enhanced cooling bearing seat device - Google Patents
Pulsating flow enhanced cooling bearing seat device Download PDFInfo
- Publication number
- CN110735808B CN110735808B CN201911190369.2A CN201911190369A CN110735808B CN 110735808 B CN110735808 B CN 110735808B CN 201911190369 A CN201911190369 A CN 201911190369A CN 110735808 B CN110735808 B CN 110735808B
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- Prior art keywords
- cooling
- bearing seat
- cooling medium
- bearing
- main shaft
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/0563—Bearings cartridges
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5846—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling by injection
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mounting Of Bearings Or Others (AREA)
- Motor Or Generator Cooling System (AREA)
Abstract
The invention discloses a pulsating flow enhanced cooling bearing seat device which comprises a sealing ring, a bearing end cover, a gasket, an integral bearing seat, a bearing and a shaft sleeve, wherein two ends of the integral bearing seat are respectively sleeved on a main shaft through the bearing; the shaft sleeve with the spiral fins is sleeved on the main shaft in a mirror symmetry mode, two ends of the cooling water tank are provided with interfaces, and the interfaces are connected to the integral bearing seat through the clamping sleeve connectors and the pipelines; the cavity is filled with a cooling medium, and a cooling medium outlet is formed in the lower surface of the middle of the integral bearing seat. The beneficial effects are that: the cooling and heat exchange device has the characteristics of simple structure, high cooling and heat exchange efficiency, convenience in installation and maintenance and no need of an additional power source.
Description
Technical Field
The invention relates to the technical field of bearing seat and shaft cooling, in particular to a pulsating flow enhanced cooling bearing seat device suitable for a high-temperature fan.
Background
Centrifugal fan is a common gas conveying device, and is widely applied to various industries. Inside the centrifugal fan, the mechanical energy of the impeller is converted into the kinetic energy of the conveying gas, and outside the centrifugal fan, the motor inputs the shaft power into the centrifugal fan through the transmission device. The transmission device comprises a main shaft, a bearing seat, a rolling bearing and a coupler. For a high-temperature centrifugal fan, the heat of the conveyed high-temperature gas is transferred to a bearing and a generator rotor through an impeller and a main shaft, and if no effective measures are taken, the temperature of the bearing and the generator rotor is overhigh, so that the normal operation and the service life of equipment are influenced. Meanwhile, for the centrifugal fan which runs at a high rotating speed for a long time, heat can be generated at the bearing, measures need to be taken to control the temperature of the bearing, and the normal operation of the equipment is ensured. In the chinese utility model patent of application number cn201720079458.x, through set up solitary cooling water drum on the main shaft, cooling water drum wall and main shaft face contact, the heat conducts the cooling water drum wall through the contact surface, and the cooling medium flows through the cooling chamber of cooling water drum, realizes the cooling to the main shaft. However, the wall surface of the cooling water drum is in sliding contact with the main shaft, the contact thermal resistance is large, and the cooling effect is limited.
In the chinese utility model patent with application number CN201120223303.1, through setting up cooling medium and main shaft direct contact, the main shaft surface is directly flowed through to the cooling medium that flows, realizes the cooling to the main shaft, but the heat transfer area of cooling medium and main shaft is limited, and the heat transfer effect remains further enhancement.
In order to solve the problems of the centrifugal fan device and the high-temperature centrifugal fan device, the heat dissipation of the transmission device must be enhanced or the transmission form must be improved (the heat transmission from the main shaft to the generator rotor is blocked or reduced).
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the pulsating flow enhanced cooling bearing seat device suitable for the high-temperature centrifugal fan, which can more effectively solve the problems of cooling the bearing of the high-temperature centrifugal fan and reducing the heat transfer of the main shaft to the rotor of the generator and has the characteristics of simple structure, high efficiency, convenience in installation and maintenance and no need of an additional power source.
In the operation process of the high-temperature fan, the heat of the high-temperature flue gas is transferred to the main shaft through the impeller, so that the temperature of the main shaft is increased. Meanwhile, the main shaft rotates at a high speed, and a large amount of heat is generated in the bearing, so that the temperature of the bearing is increased. In order to realize the heat dissipation of the main shaft in the bearing seat, the shaft sleeve with the spiral fins is arranged on the main shaft, and the shaft sleeve is in interference fit with the main shaft, so that the shaft sleeve and the main shaft do not slide relatively when the main shaft rotates, the thermal contact resistance between the shaft sleeve and the main shaft is reduced, and the heat is transferred from the main shaft to the shaft sleeve. The existence of the fins increases the heat exchange area between the heat exchange component and the cooling medium, and improves the heat exchange efficiency. In the process that the shaft sleeve pushes the cooling medium to flow, the flow field inside the cooling cavity is complex, and besides the main flow in the forward spiral direction, short-circuit flow existing between the tops of the fins and the inner wall of the bearing seat is also generated, so that convective heat transfer is greatly enhanced, and the heat transfer efficiency is further improved. When two spiral ribbed shaft sleeves with opposite spiral directions are arranged on the main shaft, mirror symmetry of the shaft sleeves is required.
The copper heat-radiating coil arranged in the water tank is connected with two ends and the middle part of the bearing seat heat-radiating cavity to form two closed cooling loops. The shaft sleeve with the spiral fins selects a proper arrangement mode according to the rotation direction of the main shaft, the shaft sleeve driving the spiral fins to rotate simultaneously when the main shaft rotates is guaranteed, cooling media in the cavity are driven to move from the two sides of the integral bearing seat to the middle part, the cooling media in the cooling cavity absorb heat of the main shaft and the bearing, the temperature is increased, the cooling media flow out from a cooling medium outlet in the middle part of the integral bearing seat under the pushing of the shaft sleeve, the cooling media flow through a cooling coil arranged in an external cooling water tank, the temperature is reduced, the cooling media flow back to the cooling cavity in the bearing seat again through cooling medium inlets arranged on the two sides of the bearing seat, and therefore the circulating cooling.
The cross section of the spiral rib perpendicular to the axis is asymmetric, so that the flow parameters periodically fluctuate in two sides and the middle of the cavity in the bearing seat, particularly in an inlet and an outlet of a cooling medium and a cooling pore channel connected with the cooling medium, and the fluctuation of the flow parameters can be transmitted to the cooling coil along with the cooling medium, and the flow parameters including flow rate, pressure and other pulsating flows which periodically change along with time can strengthen the convection heat exchange process to a certain extent, so that the heat exchange efficiency in the cooling cavity, the heating coil and the cooling pore channel can be improved.
The invention has the following advantages:
1 through the axle sleeve that adopts to have the spiral fin, utilizes the rotational speed of main shaft, has realized closed cooling cycle, need not external power source, need not to add transmission, simple structure, simple to operate.
2, in the closed circulation, the cooling medium flows through the bearing and the main shaft and is directly contacted with the part to be heat-exchanged, so that the part to be heat-exchanged can be well cooled.
3 the shaft sleeve with the spiral fins is in interference fit with the main shaft, so that the thermal contact resistance is reduced, and the heat of the main shaft can be effectively transferred into the shaft sleeve. The spiral fins on the shaft sleeve increase the heat exchange area inside the cooling cavity and strengthen the cooling effect.
4, the complex flow field in the cooling cavity in the bearing seat in the operation process of the main shaft strengthens the convection heat transfer on the surfaces of the fins. The heat of the high-temperature flue gas transferred to the main shaft through the impeller is transferred to the cooling medium through the shaft sleeve, so that the temperature of the main shaft is effectively controlled, and the excessive heat is prevented from being transferred to the motor rotor through the main shaft.
5 the cross section of the shaft sleeve with the spiral fins is asymmetric, and when the rotating speed of the main shaft is constant, pulsating flow with periodically changed flow parameters can be generated at the outlet of the cooling medium. The structure of the spiral finned sleeve with mirror symmetry can be utilized to superpose the pulsation generated at two sides, increase the pulsation amplitude, generate more stable pulsating flow and obtain more stable enhanced heat exchange effect.
6 the installation direction that sets up the axle sleeve according to the main shaft direction of rotation guarantees when the axle sleeve is rotatory along with the main shaft, promotes the cooling medium of cooling intracavity and flows to the middle part from two surveys to form the negative pressure in cooling chamber both sides, be favorable to the sealed between bearing frame both sides end cover and main shaft.
Description of the drawings:
FIG. 1 is a schematic diagram of the apparatus of the present invention
FIG. 2 shows the arrangement of the spindle sleeve with spiral ribs on the spindle, the center of the cross section of the spindle sleeve being asymmetric
FIG. 3 is a schematic diagram of a second technical solution device
FIG. 4 is a schematic diagram of a third technical solution device
1-cooling water tank, 2-cooling coil, 3-cooling coil outlet, 4-cutting sleeve joint, 5-cooling medium inlet, 6-cooling coil inlet, 7-cooling medium outlet, 8-sealing ring, 9-bearing end cover, 10-gasket, 11-shaft sleeve with spiral fins, 12-oil filler hole, 13-integral bearing seat, 14-shaft sleeve, 15-bearing, 16-main shaft, 17-bearing seat cooling medium inlet, 18-cooling coil outlet, 19-cooling water tank opening, 20-cooling water and 21-cooling water tank discharge opening.
The specific implementation mode is as follows:
the first implementation mode comprises the following steps:
as shown in fig. 1 and 2, the pulsating flow enhanced cooling bearing seat device includes a seal ring 8, a bearing end cover 9, a gasket 10, an integral bearing seat 13, a bearing 15 and a shaft sleeve 14, two ends of the integral bearing seat 13 are respectively sleeved on a main shaft 16 through the bearing 15, the shaft sleeve 14 is arranged on the inner side of the bearing 15 close to the integral bearing seat 13, the bearing end covers 9 are arranged on the outer sides of two ends of the integral bearing seat 13, the bearing end covers 9 and the main shaft are sealed through the seal ring 8, and the gasket 10 is arranged between the integral bearing seat 13 and the bearing end cover 9; the shaft sleeve 11 with the spiral fins is sleeved on the main shaft in a mirror symmetry manner, two ends of the cooling water tank 1 are provided with interfaces, and the interfaces are connected to the integral bearing seat 13 through the clamping sleeve joint 4 and a pipeline; the cavity is filled with lubricating oil as a cooling medium, and the lower surface of the middle part of the integral bearing seat 13 is provided with a cooling medium outlet 5. And a cooling medium inlet 5 is formed in the upper surface of the middle part of the integral bearing seat 13.
The middle part of the cooling water tank 1 is provided with a middle interface which is connected to the cooling coil inlet 6 through a pipeline, the cooling coil 2 is arranged in the cooling water tank 1, the left end and the right end of the cooling coil are respectively connected to the interfaces at the two ends of the cooling water tank 1, the middle part of the cooling coil 2 is connected with a three-way pipe fitting, and one outlet of the three-way pipe fitting is connected with the cooling coil inlet 6 through a pipeline.
The upper part of the cooling water tank 1 is of an open structure, cooling water 20 is filled in the cooling water tank, and a cooling water tank discharge port 21 is arranged at the lower part of the cooling water tank 1.
The second embodiment:
as shown in fig. 3, the pulsating flow enhanced cooling bearing seat device includes a sealing ring 8, a bearing end cover 9, a gasket 10, an integral bearing seat 13, a bearing 15 and a shaft sleeve 14, two ends of the integral bearing seat 13 are respectively sleeved on a main shaft 16 through the bearing 15, the shaft sleeve 14 is arranged on the inner side of the bearing 15 close to the integral bearing seat 13, the bearing end covers 9 are arranged on the outer sides of two ends of the integral bearing seat 13, the bearing end covers 9 and the main shaft are sealed through the sealing ring 8, and the gasket 10 is arranged between the integral bearing seat 13 and the bearing end covers 9; the shaft sleeve 11 with the spiral fins is sleeved on the main shaft in a mirror symmetry manner, two ends of the cooling water tank 1 are provided with interfaces, and the interfaces are connected to the integral bearing seat 13 through the clamping sleeve joint 4 and a pipeline; the cavity is filled with a cooling medium, and the lower surface of the middle part of the integral bearing seat 13 is provided with a cooling medium outlet 5. And a cooling medium inlet 5 is formed in the upper surface of the middle part of the integral bearing seat 13.
A sealing ring 8 is arranged between one side of the integral bearing seat 13, which is close to the shaft sleeve 11 with the spiral fins, and the main shaft 16, and a cavity formed inside the integral bearing seat 13 wraps the main shaft 16.
The cooling medium is not in direct contact with the bearing 15 and cooling of the bearing 15 is achieved by cooling cavities extending to both ends of the integrated bearing seat 13. Meanwhile, a heating coil is omitted in the cooling water tank 1, and cooling water is exchanged between the cooling water tank 1 and the cooling cavity under the driving of the shaft sleeve 11 with the spiral fins, so that the cooling and heat dissipation of the integral bearing block 13 and the main shaft 16 are realized.
Third embodiment
As shown in fig. 4, the pulsating flow enhanced cooling bearing seat device includes a sealing ring 8, a bearing end cover 9, a gasket 10, an integral bearing seat 13, a bearing 15 and a shaft sleeve 14, two ends of the integral bearing seat 13 are respectively sleeved on a main shaft 16 through the bearing 15, the shaft sleeve 14 is arranged on the inner side of the bearing 15 close to the integral bearing seat 13, the bearing end covers 9 are arranged on the outer sides of two ends of the integral bearing seat 13, the bearing end covers 9 and the main shaft are sealed through the sealing ring 8, and the gasket 10 is arranged between the integral bearing seat 13 and the bearing end covers 9; the shaft sleeve 11 with the spiral fins is sleeved on the main shaft in a mirror symmetry manner, two ends of the cooling water tank 1 are provided with interfaces, and the interfaces are connected to the integral bearing seat 13 through the clamping sleeve joint 4 and a pipeline; the cavity is filled with a cooling medium, and the lower surface of the middle part of the integral bearing seat 13 is provided with a cooling medium outlet 5. And a cooling medium inlet 5 is formed in the upper surface of the middle part of the integral bearing seat 13.
The plurality of cooling medium inlets 5 are arranged on the circumference of two ends of the integral bearing seat 13, and the cooling medium outlets 7 are arranged in the middle of the integral bearing seat 13 along the circumference. Air is used as the cooling medium.
Compared with the two prior technical schemes, the cooling water tank is cancelled, and the device is relatively simplified. And a plurality of cooling channels are arranged on the two sides and the middle part of the bearing seat along the circumferential direction, and the cooling channels are connected with the cooling cavity inside the bearing seat and the external environment. Under the drive of the sleeve with the spiral fins, the exchange of air inside the cooling cavity and outside air is realized, and therefore the cooling heat dissipation of the bearing seat and the main shaft is realized.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all equivalent variations made by using the contents of the present specification and the drawings are within the protection scope of the present invention.
Claims (7)
1. A pulsating flow enhanced cooling bearing seat device comprises a sealing ring, a bearing end cover, a gasket, an integral bearing seat, a bearing and a shaft sleeve, wherein two ends of the integral bearing seat are respectively sleeved on a main shaft through the bearing; the cooling water cooling device is characterized by further comprising a cooling water tank, a clamping sleeve joint and shaft sleeves with spiral fins, wherein the two shaft sleeves with the spiral fins are oppositely screwed and are sleeved on the main shaft in a mirror symmetry mode, and the cross sections of the shaft sleeves are asymmetric; the two ends of the cooling water tank are provided with interfaces which are connected to a cooling medium inlet on the integral bearing seat through a clamping sleeve joint and a pipeline; a cooling medium is filled in the cavity, and a cooling medium outlet is formed in the lower surface of the middle part of the integral bearing seat; cooling medium flows in from cooling medium inlets arranged at two ends of the integral bearing seat and flows out from a cooling medium outlet arranged in the middle; the spindle penetrates through the bearing seat, a closed heat dissipation cavity is formed in the integral bearing seat through end covers on two sides, a cooling medium inlet is formed in the middle upper portion of the integral bearing seat, the spindle further comprises a cooling coil, the cooling coil is arranged in the cooling water tank, the left end and the right end of the cooling coil are respectively connected to connectors at two ends of the box body, a tee pipe is connected to the middle of the cooling coil, and one outlet of the tee pipe is connected with the cooling medium outlet through a pipeline.
2. The pulsating flow enhanced cooling bearing seat device as claimed in claim 1, wherein the upper portion of the cooling water tank is open, and a cooling water tank discharge port is provided at the lower portion of the cooling water tank.
3. The pulsating flow enhanced cooling bearing housing apparatus as claimed in any one of claims 1-2, wherein the cooling medium is a lubricating oil.
4. The pulsating flow enhanced cooling bearing block device according to claim 1, wherein a sealing ring is arranged between one side of the integrated bearing block close to the shaft sleeve with the spiral fins and the main shaft, and a cavity formed inside the integrated bearing block wraps the main shaft.
5. The pulsating flow enhanced cooling bearing block device of claim 4, wherein said cooling medium is water.
6. The pulsating flow enhanced cooling bearing block device of claim 1, wherein a plurality of said cooling medium inlets are arranged at both ends of said integrated bearing block along the circumferential direction, and said cooling medium outlets are arranged at the middle of said integrated bearing block along the circumferential direction.
7. The pulsating flow enhanced cooling bearing block device according to claim 1, wherein the cooling medium is air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911190369.2A CN110735808B (en) | 2019-11-28 | 2019-11-28 | Pulsating flow enhanced cooling bearing seat device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911190369.2A CN110735808B (en) | 2019-11-28 | 2019-11-28 | Pulsating flow enhanced cooling bearing seat device |
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| Publication Number | Publication Date |
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| CN110735808A CN110735808A (en) | 2020-01-31 |
| CN110735808B true CN110735808B (en) | 2021-06-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911190369.2A Active CN110735808B (en) | 2019-11-28 | 2019-11-28 | Pulsating flow enhanced cooling bearing seat device |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111442025A (en) * | 2020-04-03 | 2020-07-24 | 常州鑫和利精密机械有限公司 | Automobile engine motor shaft and machining method thereof |
| CN113482975B (en) * | 2021-07-30 | 2022-11-29 | 上海瑞晨环保科技股份有限公司 | Main shaft cooling device |
| CN114934952A (en) * | 2022-05-25 | 2022-08-23 | 青岛科技大学 | Self-cooling hydrostatic bearing |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03120882A (en) * | 1989-10-04 | 1991-05-23 | Fanuc Ltd | Turbo blower for laser and laser oscillation device using same |
| CN1065325C (en) * | 1998-02-17 | 2001-05-02 | 鄢平安 | High speed centrifugal pump |
| CN200975362Y (en) * | 2006-12-04 | 2007-11-14 | 上海连成（集团）有限公司 | Horizontal pump oil chamber improved lubricating heat radiating device |
| GB2556299B (en) * | 2015-08-19 | 2021-02-24 | Daido Metal Co | Vertical bearing device |
| CN107218253A (en) * | 2017-07-11 | 2017-09-29 | 武安市永盛机械泵业有限公司 | A kind of heat medium pump containing cooling bearing body device |
| CN109751276A (en) * | 2019-03-18 | 2019-05-14 | 江苏恒康机电有限公司 | A kind of blower transmission high-temperature bearing seat-box |
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