CN107269571B - Self-circulation system for lubricating oil of bearing box for pump - Google Patents
Self-circulation system for lubricating oil of bearing box for pump Download PDFInfo
- Publication number
- CN107269571B CN107269571B CN201710660688.XA CN201710660688A CN107269571B CN 107269571 B CN107269571 B CN 107269571B CN 201710660688 A CN201710660688 A CN 201710660688A CN 107269571 B CN107269571 B CN 107269571B
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- Prior art keywords
- oil
- bearing
- pump
- shaft sleeve
- outlet channel
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Classifications
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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
- F04D29/04—Shafts or bearings, or assemblies thereof
- F04D29/046—Bearings
-
- 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
- F04D29/06—Lubrication
- F04D29/061—Lubrication especially adapted for liquid pumps
Abstract
The invention discloses a self-circulation system for lubricating oil of a bearing box for a pump, which comprises a bearing box, wherein a bearing is arranged in the bearing box, and the bearing is connected with a pump shaft through a shaft sleeve in a tight fit manner; the upper end of the pump shaft extends out of the box cover of the bearing box, and the lower end of the pump shaft extends out of the bottom cover of the bearing box; in the bearing box, a cavity between the lower end surface of the bearing and the bottom cover forms an oil storage cavity, and an oil outlet channel is formed in the bottom cover; an oil return channel is formed in the top cover; an oil inlet of the oil outlet channel faces the circumferential surface of the pump shaft; the lower end of the shaft sleeve extends downwards to the lower part of an oil inlet of the oil outlet channel; an oil conveying groove is arranged on the shaft sleeve wall at the lower end of the shaft sleeve; along with the rotation of the pump shaft, the oil conveying groove on the shaft sleeve can align to the oil inlet of the oil outlet channel, and lubricating oil in the oil storage cavity is thrown into the oil outlet channel; along with the rotation of the pump shaft, the shaft sleeve wall of the shaft sleeve can seal the oil inlet so as to maintain the conveying pressure; the oil outlet passage is communicated with the oil return passage through an oil return pipe. The invention utilizes the lubricating oil to carry out circulating lubrication and heat absorption on the bearing, thereby improving the heat dissipation efficiency of the bearing.
Description
Technical Field
The invention relates to a bearing box for a pump, in particular to a self-circulation system for lubricating oil.
Background
The bearing housing is a housing part that serves to support and lubricate the bearings, while at the same time, bearing the axial and radial forces generated by the device during operation. In devices having a rotating shaft, the shaft is typically supported for rotation by bearings mounted in a bearing housing, the bearing housing being filled with lubricating oil to lubricate the bearings during operation. In the prior art, as shown in fig. 1, an oil reservoir in a bearing housing for a pump is a cavity located below a bearing, and a bearing 1b is lubricated by injecting lubricating oil capable of submerging the bearing 1b into the oil reservoir 1 c. However, since the temperature of the bearing 1b increases with the rotation of the pump shaft 1a, the bearing 1b needs to be cooled down as well as lubricated. However, in the prior art, the bearings can only be cooled by heat absorption through the upper layer of lubricating oil 1d, the cooling efficiency is low, the cooling effect is not obvious, the bearings generate heat seriously, the service life is shortened, and even the normal operation of equipment can be influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a self-circulation system for lubricating oil of a bearing box for a pump, which solves the technical problem of low heat dissipation efficiency of a bearing in the prior art, can utilize the lubricating oil to carry out circulation lubrication and heat absorption on the bearing, and improves the heat dissipation efficiency of the bearing.
In order to solve the technical problems, the technical scheme of the invention is as follows: a self-circulation system for lubricating oil of a bearing box for a pump comprises the bearing box, wherein a bearing is arranged in the bearing box, and the bearing is connected with a pump shaft through a shaft sleeve in a tight fit manner; the upper end of the pump shaft extends out of the box cover of the bearing box, the lower end of the pump shaft extends out of the bottom cover of the bearing box, and the upper end and the lower end of the pump shaft are respectively sealed with the top cover and the bottom cover through sealing mechanisms; in the bearing box, a cavity between the lower end surface of the bearing and the bottom cover forms an oil storage cavity, and an oil outlet channel is formed in the bottom cover; an oil return channel is formed in the top cover; an oil outlet of the oil return channel is positioned above the bearing and faces the upper end face of the bearing; an oil inlet of the oil outlet channel on the bottom cover faces the circumferential surface of the pump shaft; the lower end of the shaft sleeve extends downwards to the position below an oil inlet of the oil outlet channel; an oil conveying groove is formed in the wall of the shaft sleeve at the lower end of the shaft sleeve; along with the rotation of the pump shaft, the oil conveying groove on the shaft sleeve can align to the oil inlet of the oil outlet channel, so that the oil storage cavity is communicated with the oil outlet channel, and lubricating oil in the oil storage cavity is pressed into the oil outlet channel; along with the rotation of the pump shaft, the shaft sleeve wall of the shaft sleeve can seal the oil inlet so as to maintain the conveying pressure; the oil outlet of the oil outlet channel is communicated with the oil inlet of the oil return channel through an oil return pipe.
Preferably, the upper end of the shaft sleeve is in tight fit connection with the pump shaft, and the middle part and the lower end of the shaft sleeve are in clearance fit with the pump shaft; the lower end of the pump shaft is sealed with the outer end face of the bottom cover through a cylindrical oil pan; the cylindrical oil pan comprises a cylinder body which is inserted into the shaft sleeve and sleeved on the pump shaft, the inner wall surface of the cylinder body is in clearance fit with the pump shaft, and the cylinder body is prevented from being in clearance fit with the shaft sleeve; the lower end of the cylinder is provided with a flanging, and the flanging is fixed on the outer end face of the bottom cover through a screw; the flanging is attached to the outer end face of the bottom cover and is sealed with the outer end face of the bottom cover through the sealing ring.
Preferably, the upper end and the lower end of the oil return pipe are respectively connected with the oil inlet of the oil return channel and the oil outlet of the oil outlet channel through sealing joints.
Preferably, the number of the oil conveying grooves is two; the two oil delivery grooves are symmetrically arranged about the axis of the pump shaft.
Preferably, the upper end of the oil conveying groove is positioned above the inner end face of the bottom cover, and the lower end of the oil conveying groove is positioned below the oil inlet of the oil outlet channel.
Preferably, the oil outlet channel is arranged on one side of the bottom cover, and the oil inlet channel is arranged on the top cover and on the same side as the oil outlet channel.
Compared with the prior art, the invention has the following beneficial effects:
1. the pump shaft is used for driving the shaft sleeve to rotate, the shaft sleeve is provided with an oil conveying groove, and after lubricating oil enters the oil conveying groove, the lubricating oil in the oil conveying groove is thrown into the oil outlet channel under the action of centrifugal force when the oil conveying groove is aligned with an oil inlet of the oil outlet channel along with the rotation of the shaft sleeve; along with the high-speed rotation of pump shaft, lubricating oil is thrown into in the oil duct constantly to going out the oil channel to form continuous flow's liquid in going out the oil channel and returning oil pipe, along with the continuous increase of liquid, the pressure of liquid constantly increases in going out oil channel and the returning oil pipe, thereby impress lubricating oil in the returning oil channel, lubricating oil comes out from the oil-out in the returning oil channel, fall to the bearing up end, pass through from the bearing is inside again, terminal surface fall back to the oil storage chamber under the bearing, thereby accomplish the circulative cooling and the lubrication to the bearing.
2. Along with the rotation of pump shaft, the axle sleeve wall of axle sleeve can seal the oil inlet, avoids the lubricating oil in the oil outlet channel to flow back in the oil storage chamber, causes the pressure drop of the interior lubricating oil of oil outlet channel to keep delivery pressure.
3. Because the lubricating oil in the oil conveying groove comes from the lower layer of the oil storage cavity, the oil temperature of the lower layer is lower than that of the upper layer, and the lubricating oil which circulates to the bearing comes from the lower layer of the oil storage cavity, the heat absorption efficiency of the lubricating oil can be greatly improved, and the heat dissipation efficiency of the bearing is improved.
4. Because the inner circle in the bearing rotates along with the pump shaft, when lubricating bearing one side, along with the rotation of bearing inner circle, the lubricating oil of bearing one side can be taken to the opposite side to also lubricated and the heat absorption the bearing opposite side, like this, just need set up the oil circuit that circulates (play oil passageway, return oil pipe and oil return passageway) in one side of bearing box, great simplification structure, the cost is reduced.
5. The cylindrical oil pan is arranged to seal the space between the lower end of the pump shaft and the bottom cover, so that when lubricating oil permeates into the shaft sleeve from a gap between the shaft sleeve and the bottom cover, the cylinder body prevents the pump shaft from contacting the lubricating oil, and the lubricating oil is prevented from flowing out from the lower end of the pump shaft along the pump shaft to cause leakage; in addition, the leakage caused by the fact that lubricating oil flows out from the outer end face of the bottom cover can be avoided through the flanging on the cylindrical oil pan.
6. Set up the oil transportation groove of two symmetries on the axle sleeve, can increase the oil feed efficiency of the passageway that produces oil for circulation oil circuit can be faster fill up lubricating oil, shortens cycle, thereby improves the radiating efficiency of bearing.
7. Because the bearing is lubricated and cooled by adopting the circulating oil way (the oil outlet channel, the oil return pipe and the oil return channel), the bearing does not need to be immersed into lubricating oil for lubrication and cooling, and the using amount of the lubricating oil is greatly reduced.
Drawings
FIG. 1 is a schematic view of a prior art bearing housing for a pump;
fig. 2 is a schematic structural view of a self-circulation system for pump bearing housing lubricant in the present embodiment.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and preferred embodiments.
As shown in fig. 2, a self-circulation system for lubricating oil of a bearing box for a pump comprises a bearing box, wherein a bearing 2 is arranged in the bearing box, and the bearing 2 is tightly matched and connected with a pump shaft 1 through a shaft sleeve 6; the upper end of the pump shaft 1 extends out of the top cover 3 of the bearing box, the lower end of the pump shaft extends out of the bottom cover 4 of the bearing box, and the upper end and the lower end of the pump shaft 1 are respectively sealed with the top cover 3 and the bottom cover 4 through sealing mechanisms; in the bearing box, a cavity between the lower end surface of the bearing 2 and the bottom cover 4 forms an oil storage cavity, and an oil outlet channel 41 is formed in the bottom cover 4; an oil return channel 31 is arranged in the top cover 3; the oil outlet of the oil return channel 31 is positioned above the bearing 2 and faces the upper end face of the bearing 2; the oil inlet of the oil outlet channel 41 on the bottom cover 4 faces the circumferential surface of the pump shaft 1; the lower end of the shaft sleeve 6 extends downwards to the lower part of an oil inlet of the oil outlet channel 41; an oil conveying groove 61 is formed in the wall of the shaft sleeve at the lower end of the shaft sleeve 6; along with the rotation of the pump shaft 1, the oil conveying groove 61 on the shaft sleeve 6 can be aligned with the oil inlet of the oil outlet channel 41, so that the oil storage cavity is communicated with the oil outlet channel 41, and lubricating oil in the oil storage cavity is pressed into the oil outlet channel 41; along with the rotation of the pump shaft 1, the shaft sleeve wall of the shaft sleeve 6 can close the oil inlet to maintain the conveying pressure; the oil outlet of the oil outlet channel 41 is communicated with the oil inlet of the oil return channel 31 through an oil return pipe 7.
When the pump shaft 1 rotates, the shaft sleeve 6 tightly matched with the pump shaft 1 rotates along with the pump shaft, when the shaft sleeve 6 rotates to the oil conveying groove 61 on the shaft sleeve 6 and is aligned with the oil inlet of the oil outlet channel 41, the oil conveying groove 61 is communicated with the oil storage cavity and the oil outlet channel 41, and lubricating oil in the oil conveying groove 61 is thrown into the oil outlet channel 41 under the action of centrifugal force; along with the high-speed rotation of pump shaft 1, oil input groove 61 is constantly thrown into lubricating oil to play oil passageway 41 to form continuous flowing liquid in play oil passageway 41 and oil return pipe 7, along with the continuous increase of liquid, the pressure of the interior liquid of play oil passageway 41 and oil return pipe 7 constantly increases, thereby impress lubricating oil in the oil return passageway 31, lubricating oil comes out from the oil-out in oil return passageway 31, fall to the bearing 2 up end, pass through from bearing 3 inside again, through the lower terminal surface of bearing 3 fall back to the oil storage chamber, thereby accomplish the circulative cooling and the lubrication to bearing 2.
The pump shaft 1 continues to rotate, the oil delivery groove 61 is separated from the oil inlet of the oil outlet channel 41, so that the oil inlet is sealed by the shaft sleeve wall of the shaft sleeve 6, the lubricating oil in the oil outlet channel 41 is prevented from flowing back to the oil storage cavity, the pressure of the lubricating oil in the oil outlet channel 41 is prevented from being reduced, and the delivery pressure is maintained. In order to ensure that the shaft sleeve wall seals the oil inlet, the diameter of a circular hole which is formed in the bottom cover 4 and used for extending out of the lower end of the pump shaft 1 is equal to the outer diameter of the shaft sleeve 6.
In the concrete mode, the upper end of the shaft sleeve 6 is in tight fit connection with the pump shaft 1, and the middle part and the lower end of the shaft sleeve 6 are in clearance fit with the pump shaft 1; the lower end of the pump shaft 1 is sealed with the outer end face of the bottom cover 4 through a cylindrical oil pan 5; the cylindrical oil pan 5 comprises a cylinder body which is inserted into the shaft sleeve 6 and is sleeved on the pump shaft 1, the inner wall surface of the cylinder body is in clearance fit with the pump shaft 1, and the outer wall surface of the cylinder body is in clearance fit with the shaft sleeve 6; the lower end of the cylinder is provided with a flanging which is fixed on the outer end face of the bottom cover 4 through a screw; the flanging is attached to the outer end face of the bottom cover 4 and is sealed with the outer end face of the bottom cover 4 through the sealing ring, an annular groove for containing the sealing ring is formed in the outer end face of the bottom cover 4, the flanging is tightly pressed on the outer end face of the bottom cover 4 through a screw, and the sealing ring makes up a gap between the flanging and the outer end face of the bottom cover 4 through deformation, so that the sealing purpose is achieved.
The cylindrical oil pan 5 is arranged to seal the lower end of the pump shaft 1 and the bottom cover 4, so that when lubricating oil permeates into the shaft sleeve 6 from a gap between the shaft sleeve 6 and the bottom cover 4, the cylinder body prevents the pump shaft 1 from contacting the lubricating oil, and the lubricating oil is prevented from flowing out of the lower end of the pump shaft 1 along the pump shaft 1 to cause leakage; in addition, the flanging on the cylindrical oil pan 5 can avoid leakage caused by outflow of lubricating oil from the outer end face of the bottom cover 4.
In this embodiment, the upper end and the lower end of the oil return pipe 7 are respectively connected to the oil inlet of the oil return channel 31 and the oil outlet of the oil outlet channel 41 through sealing joints. Thus, the sealing performance of the oil return line can be provided, thereby ensuring the delivery pressure of the circulating oil passage (the oil outlet passage 41, the oil return pipe 7, and the oil return passage 31).
In this embodiment, the number of the oil conveying grooves 61 is two; the two oil delivery troughs are arranged symmetrically about the axis of the pump shaft 1. Like this, set up the oil transportation groove 61 of two symmetries on axle sleeve 6, can increase the oil feed efficiency of the passageway that produces oil for the circulation oil circuit can be more quick fills up lubricating oil, shortens cycle, thereby improves the radiating efficiency of bearing.
In this embodiment, the upper end of the oil transportation groove 61 is located above the inner end surface of the bottom cover 4, and the lower end of the oil transportation groove 61 is located below the oil inlet of the oil outlet channel 41. Thus, the lubricating oil in the oil storage cavity can smoothly enter the oil conveying groove 61, and meanwhile, the lubricating oil in the oil conveying groove 61 can smoothly enter the oil outlet channel 41. As for the shape of the oil delivery groove 61, the oil delivery groove 61 may be a vertical groove having a height greater than a width, or may be a horizontal groove having a width greater than a height.
In this embodiment, the oil outlet channel 41 is disposed on one side of the bottom cover 4, and the oil inlet channel 31 is disposed on the same side of the top cover 3 as the oil outlet channel 41. Because the inner ring in the bearing 2 rotates along with the pump shaft 1, when one side of the bearing 2 is lubricated, the lubricating oil on one side of the bearing 2 can be brought to the other side along with the rotation of the inner ring of the bearing 2, so that the other side of the bearing 2 is lubricated and absorbs heat, and in this way, only one side of the bearing box is required to be provided with a circulating oil way (an oil outlet channel 41, an oil return pipe 7 and an oil return channel 31), the structure is greatly simplified, and the cost is reduced.
Claims (6)
1. A self-circulation system for lubricating oil of a bearing box for a pump comprises the bearing box, wherein a bearing is arranged in the bearing box, and the bearing is connected with a pump shaft through a shaft sleeve in a tight fit manner; the upper end of the pump shaft extends out of the box cover of the bearing box, the lower end of the pump shaft extends out of the bottom cover of the bearing box, and the upper end and the lower end of the pump shaft are respectively sealed with the top cover and the bottom cover through sealing mechanisms; in the bearing box, the cavity between terminal surface and the bottom forms oil storage chamber, its characterized in that under the bearing: an oil outlet channel is formed in the bottom cover; an oil return channel is formed in the top cover; an oil outlet of the oil return channel is positioned above the bearing and faces the upper end face of the bearing; an oil inlet of the oil outlet channel on the bottom cover faces the circumferential surface of the pump shaft; the lower end of the shaft sleeve extends downwards to the position below an oil inlet of the oil outlet channel; an oil conveying groove is formed in the wall of the shaft sleeve at the lower end of the shaft sleeve; along with the rotation of the pump shaft, the oil conveying groove on the shaft sleeve can align to the oil inlet of the oil outlet channel, so that the oil storage cavity is communicated with the oil outlet channel, and lubricating oil in the oil storage cavity is thrown into the oil outlet channel; along with the rotation of the pump shaft, the shaft sleeve wall of the shaft sleeve can seal the oil inlet so as to maintain the conveying pressure; the oil outlet of the oil outlet channel is communicated with the oil inlet of the oil return channel through an oil return pipe.
2. The self-circulation system for pump bearing housing oil according to claim 1, wherein: the upper end of the shaft sleeve is tightly matched and connected with the pump shaft, and the middle part and the lower end of the shaft sleeve are in clearance fit with the pump shaft; the lower end of the pump shaft is sealed with the outer end face of the bottom cover through a cylindrical oil pan; the cylindrical oil pan comprises a cylinder body which is inserted into the shaft sleeve and sleeved on the pump shaft, the inner wall surface of the cylinder body is in clearance fit with the pump shaft, and the outer wall surface of the cylinder body is in clearance fit with the shaft sleeve; the lower end of the cylinder is provided with a flanging, and the flanging is fixed on the outer end face of the bottom cover through a screw; the flanging is attached to the outer end face of the bottom cover and is sealed with the outer end face of the bottom cover through the sealing ring.
3. The self-circulation system for pump bearing housing oil according to claim 1, wherein: the upper end and the lower end of the oil return pipe are respectively connected with an oil inlet of the oil return channel and an oil outlet of the oil outlet channel through sealing joints.
4. The self-circulation system for pump bearing housing oil according to claim 1, wherein: the number of the oil conveying grooves is two; the two oil delivery grooves are symmetrically arranged about the axis of the pump shaft.
5. The self-circulation system for pump bearing housing oil according to claim 1, wherein: the upper end of the oil conveying groove is positioned above the inner end face of the bottom cover, and the lower end of the oil conveying groove is positioned below an oil inlet of the oil outlet channel.
6. The self-circulation system for pump bearing housing oil according to claim 1, wherein: the oil outlet channel is arranged on one side of the bottom cover, and the oil inlet channel is arranged on the top cover and is arranged on the same side of the oil outlet channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660688.XA CN107269571B (en) | 2017-08-04 | 2017-08-04 | Self-circulation system for lubricating oil of bearing box for pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710660688.XA CN107269571B (en) | 2017-08-04 | 2017-08-04 | Self-circulation system for lubricating oil of bearing box for pump |
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| Publication Number | Publication Date |
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| CN107269571A CN107269571A (en) | 2017-10-20 |
| CN107269571B true CN107269571B (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710660688.XA Active CN107269571B (en) | 2017-08-04 | 2017-08-04 | Self-circulation system for lubricating oil of bearing box for pump |
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| CN107965566A (en) * | 2017-12-29 | 2018-04-27 | 重庆朗奥机械有限公司 | A kind of automobile rotation axis lubricating arrangement |
| CN108626276B (en) * | 2018-05-15 | 2020-04-24 | 中联重机股份有限公司 | Clean heat dissipation lubricating system of stopper |
| CN109973197B (en) * | 2019-03-27 | 2023-11-28 | 盐城海纳汽车零部件有限公司 | Cooling water pump for self-cooling engine |
| CN110439804B (en) * | 2019-06-28 | 2021-04-30 | 武汉船用机械有限责任公司 | Lubricating device for deep well pump transmission shaft |
| CN113154237B (en) * | 2021-04-15 | 2022-05-17 | 中国航发湖南动力机械研究所 | Coaxial contra-rotating helicopter transmission system lubricating structure and helicopter |
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