CN110553035B - Oil mist leakage prevention method - Google Patents
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- CN110553035B CN110553035B CN201910825936.0A CN201910825936A CN110553035B CN 110553035 B CN110553035 B CN 110553035B CN 201910825936 A CN201910825936 A CN 201910825936A CN 110553035 B CN110553035 B CN 110553035B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
Abstract
The invention discloses a method for preventing oil mist leakage, which relates to the oil mist leakage prevention of motor equipment and comprises an oil groove cover, a cold air collecting device and a cold air collecting device, wherein an inner cavity for containing cold air is arranged on the oil groove cover and is used for condensing oil mist close to an oil groove cover main body; a condensation cavity is arranged between the oil groove cover and the main shaft and is used for condensing oil mist ascending along the main shaft; a refrigeration source is arranged on the oil groove cover main body to create a low-temperature environment for the inner cavity; the bottom of the oil groove cover main body is provided with a grid-shaped structure for changing the flow speed and the flow direction of oil mist. The technical scheme utilizes the principle that oil mist is condensed into oil drops when meeting condensation, and adopts cold air to condense the oil mist, thereby preventing the oil mist from overflowing and simultaneously avoiding the pollution to equipment and environment.
Description
Technical Field
The invention relates to oil mist leakage prevention of motor equipment, in particular to an oil groove cover structure for preventing oil mist leakage.
Background
At present, most of electrical equipment including a generator and a motor has the problem of oil mist overflow. The main reasons are that:
each motor set is provided with a guide bearing oil groove at the connecting part of the main shaft and the bearing bush, and lubricating oil is filled in the oil groove. When the guide bearing runs, heat is continuously generated due to the relative movement and mutual extrusion of the contact surfaces of the main shaft and the bearing bush, so that lubricating oil is vaporized to generate oil mist; the oil mist continuously collides in the oil groove, rotates at a high speed along with the group and does centrifugal motion in the oil groove; the oil mist is thrown from the bearing bush to the wall of the oil groove, rises along the wall of the oil groove, returns to the surface of the main shaft along the upward direction of the upper oil groove cover plate, and finally escapes through a gap between the oil groove cover and the main shaft; the oil mist is condensed into liquid outside and attached to the surface of equipment, and the oil mist pollutes a unit seriously.
In the face of the aforementioned problems, the following solutions exist in the prior art: the oil tank cover adopts a single-layer steel plate structure, and comb teeth are arranged at the joint gap of the oil tank cover and the main shaft for sealing. However, the comb teeth sealing still has certain gaps, so that the oil mist prevention effect is very limited, and the oil mist still leaks out of the oil groove in actual use; the comb seal is arranged to only reduce the overflow of oil mist, and still cause certain pollution to the machine construction. The problem of leaking of oil mist can't thoroughly be solved to this scheme, and clearance control between fuel tank cap and the main shaft is comparatively strict simultaneously, generally, still need add air cleaner on the fuel tank cap in order to ensure that the internal and external pressure of fuel tank cap is balanced, prevents that the oil baffle department from appearing getting rid of oil in the oil tank.
Or a contact type seal is arranged at the joint of the oil tank cover and the main shaft, and the contact type seal is that a sealing block made of composite materials is arranged on the oil tank cover. The disadvantages are that: although the sealing block can effectively seal oil mist, the sealing block is easy to wear, the sealing effect is lost after several months, the sealing block needs to be replaced, and the performance requirement of the sealing block is high, so that the selection cost of the composite material is high. A large amount of oil stains are attached to the sealing blocks, the production cycle can be stopped when the sealing blocks are replaced, a large amount of manpower and material resources are wasted, and the replaced sealing blocks can cause environmental pollution. Sliding friction between the sealing block and the main shaft can generate heat, and the shafting ferry is increased, so that the running of the unit is not favorable; heat is also transferred to the bearing shoes through the main shaft, further detrimental to the bearing shoes operation. Meanwhile, in order to prevent the oil baffle plate in the oil groove from throwing oil, the structure needs to additionally arrange an air filter on the oil tank cover to ensure the balance of the internal pressure and the external pressure of the oil tank cover, and the air filter needs to be cleaned frequently, so that the production cycle is stopped, and a large amount of manpower and material resources are wasted.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides a method for preventing oil mist leakage. This technical scheme utilizes cold air to condense the oil mist, when solving the oil mist and spilling over the problem, makes the oil mist recycle, has still prevented the oil mist simultaneously and has caused environmental pollution. The method is realized by the following technical scheme:
a method for preventing oil mist leakage is characterized in that: the method comprises the following steps:
A. an inner cavity for containing cold air is arranged on the oil groove cover main body, so that oil mist close to the bottom of the oil groove cover main body is condensed into oil drops to return to the oil groove after heat exchange with cold air in the inner cavity;
B. the oil groove cover main body is arranged on the main shaft, so that the oil groove cover main body and the main shaft are matched with each other to form a condensation cavity, the condensation cavity is communicated with the inner cavity, cold air in the inner cavity can spread into the condensation cavity, oil mist ascending along the main shaft is condensed into oil drops to return to the oil groove, and the oil mist is prevented from leaking out of a gap between the oil groove cover main body and the main shaft;
C. a refrigeration source for providing cold air for the inner cavity and creating a low-temperature condition is arranged on the oil groove cover main body;
D. the bottom of the oil groove cover main body is provided with a grid-shaped structure, the flow velocity of oil mist is changed by utilizing the grid-shaped structure, the heat exchange rate of the oil mist at the bottom of the oil groove cover main body is increased, meanwhile, the flow direction of the oil mist is changed by utilizing the grid-shaped structure, the oil mist which is not condensed returns to the main shaft surface, and returns to the oil groove again after rebounding through the main shaft; the oil mist is prevented from being too much, so that the oil mist is accumulated in the oil groove and faces the risk of overflowing.
The oil groove cover main part comprises a first oil groove cover plate and a second oil groove cover plate, the step A further comprises the step of arranging a heat insulation layer on the first oil groove cover plate, processing the first oil groove cover plate into a second oil groove cover plate by using an aluminum alloy material, mutually matching the first oil groove cover plate and the second oil groove cover plate to form an inner cavity, and arranging a sealing structure at the radial connection position of the first oil groove cover plate and the second oil groove cover plate to enable the inner cavity to be in a sealing state.
The step B also comprises the step of arranging gaps at the top of the condensation cavity and at the joint of the main shaft and the oil groove cover main body, so that cold air can circulate conveniently; the comb seals are arranged at the joints of the bottom of the condensation cavity, the main shaft and the oil groove cover main body, and oil mist is prevented from entering the condensation cavity.
And C, further comprising the step of forming heat dissipation holes in the oil groove cover main body at the top of the inner cavity, arranging the semiconductor refrigerating sheet at the top of the inner cavity, enabling the heat dissipation holes to be covered by the heat dissipation surface of the semiconductor refrigerating sheet comprehensively, and arranging a switch for controlling the working state of the semiconductor refrigerating sheet at the top of the oil groove cover main body.
And the step C also comprises the step of forming an air inlet hole communicated with the inner cavity on the oil groove cover main body and then connecting the refrigerating equipment from the outside of the inner cavity through the air inlet hole.
The utility model provides an oil groove cover structure that grease proofing fog was revealed, mainly includes sets up the oil groove cover main part on main shaft, its characterized in that: the oil sump cover main body comprises a first oil sump cover plate and a second oil sump cover plate; the first oil groove cover plate, the second oil groove cover plate and the main shaft are matched with each other to form a condensation cavity; the first oil groove cover plate and the second oil groove cover plate are matched with each other to form an inner cavity which is used for containing cold air and communicated with the condensation cavity; and a refrigeration source for providing cold air for the inner cavity and creating a low-temperature condition is arranged on the oil tank cover main body.
The oil groove generates oil mist under high temperature environment, the oil mist rotates at high speed along with the set, and is centrifugally moved in the oil groove, thrown from the bearing bush to the oil groove wall, ascends along the oil groove wall and gradually approaches the second oil groove cover plate, and the oil mist can be changed into oil drops and returns to the oil groove by adopting a low-temperature cooling oil mist method. Therefore, the low-temperature environment is kept in the inner cavity for a long time, most of oil mist close to the second oil groove cover plate can be cooled and condensed into oil drops, and the refrigeration source is used for providing cold air for the inner cavity and creating a low-temperature condition. The condensation cavity is arranged at the joint of the main shaft and the oil groove cover main body, cold air in the inner cavity extends into the condensation cavity, most oil mist is cooled and condensed at the bottom of the second oil groove cover plate, a small part of oil mist is remained to rise along the main shaft, and the oil mist is condensed into oil drops to return to the oil groove after approaching the condensation cavity.
In order to prevent excessive oil mist, part of the oil mist cannot be close to the bottom of the second oil groove cover plate, so that the oil mist is accumulated in the oil groove and faces the risk of overflowing, and the bottom of the second oil groove cover plate is provided with a grid-shaped structure used for changing the flow direction of the oil mist and reducing the flow speed of the oil mist. The grid-shaped structure can reduce the flow velocity of oil mist close to the bottom of the second oil tank cover plate, increase the heat exchange efficiency of the bottom of the second oil tank cover plate and enable more oil mist to be cooled at the bottom of the second oil tank plate; the grid-shaped structure changes the flow direction of the oil mist, one part of the oil mist is cooled and condensed into oil drops to return to the oil tank, the other part of the oil mist is changed in flow direction by the grid-shaped structure and returns to the main shaft surface, and the oil mist returns to the oil tank again after rebounding by the main shaft, so that the oil mist in the oil tank flows circularly.
The refrigerating source is a semiconductor refrigerating piece arranged in the inner cavity, the refrigerating piece is also called a thermoelectric semiconductor refrigerating assembly, and the refrigerating piece is divided into two sides which are heat-conducting welts, one side which absorbs heat and the other side which dissipates heat. Make things convenient for the heat dissipation of semiconductor refrigeration piece, be provided with the louvre on the first oil groove apron, the cooling surface of semiconductor refrigeration piece set up in first oil groove apron bottom, for the leakproofness of guaranteeing the inner chamber, the cooling surface of semiconductor refrigeration piece covers the louvre comprehensively. The work of refrigeration piece needs under the circumstances of circular telegram, from the saving angle consideration, and when the unit stopped working, semiconductor refrigeration piece also need stop working, consequently, first oil groove apron top is provided with the switch of control refrigeration source operating condition.
The refrigeration piece refrigeration is fast, and its refrigeration speed accessible adjustment operating current controls, and the refrigeration piece still has: the air conditioner has the advantages of no noise, no vibration, no abrasion, reliable operation, convenient maintenance, small volume, light weight, no environmental pollution and the like, can greatly save the building area, and is arranged in the inner cavity as a refrigeration source to achieve the refrigeration purpose and save the space.
An air inlet hole can be formed in the oil groove cover main body, refrigeration equipment is connected to the outside and serves as a refrigeration source of the inner cavity, the refrigeration equipment is communicated with the inner cavity through the air inlet hole, and the refrigeration equipment can be an air conditioner, a refrigerator or other refrigeration sources. The benefit of accessing the refrigeration equipment from the outside is that the temperature can be controlled according to the rate at which oil mist is produced; the current resources are well utilized, if the refrigerator is connected into the inner cavity as a refrigeration source, the refrigerator can normally work, the use requirements of general refrigerators are met, and the requirements of the scheme are met. Preferably, the air inlet hole is opposite to the vent hole, and the advantage is that the cold air spreading direction is clear, so that the cold air quality in the condensation cavity and the inner cavity is ensured.
The radial connection position of the first oil groove cover plate and the second oil groove cover plate is provided with a seal, so that the inner cavity is in a sealed state, cold air is prevented from flowing away from a gap, the cold air which extends into the condensation cavity is insufficient, and oil mist which rises along the main shaft and is close to the connection position of the main shaft and the oil groove cover can not be sufficiently cooled.
The direction of this technical scheme lies in cooling the oil mist, then needs the oil mist to carry out the heat exchange with the inner chamber in second oil groove apron bottom, so the material of processing second oil groove apron is the aluminum alloy material who possesses good heat conductivity and corrosion resistance, can not cause the rise of cost when aluminum alloy material optimizes oil tank cover bulk property, and the heat exchange of airtight inner chamber and oil mist has been guaranteed to good heat conductivity. And in order to avoid the heat exchange between the air outside the oil tank and the inner cavity, the first oil tank cover plate is made of a heat insulation material.
A gap is reserved between the first oil groove cover plate and the main shaft, and the condensation cavity is communicated with the outside through the gap, so that cold air can conveniently circulate; and comb teeth are arranged between the main shafts of the second oil groove cover plate for sealing, so that oil mist is prevented from entering the condensation cavity.
The invention has the following beneficial effects:
(1) by utilizing the principle that oil mist is condensed into oil drops when meeting condensation, the technical scheme adopts cold air to condense the oil mist, so that the oil mist is prevented from overflowing, and meanwhile, the pollution to equipment and the environment is avoided;
(2) the air filter does not need to be additionally arranged on the oil tank cover in order to ensure the balance of the internal and external pressure of the oil tank cover and prevent the oil throwing at the oil baffle plate in the oil tank, thereby further avoiding the trouble that the filter is frequently cleaned by air;
(3) the production cycle is not suspended due to the replacement of parts, the oil mist is condensed into oil drops to return to the oil groove for reuse, and the waste of manpower and material resources is avoided.
Drawings
The foregoing and following detailed description of the invention will be apparent when read in conjunction with the following drawings, in which:
FIG. 1 is a schematic cross-sectional view of a basic sump cover structure;
FIG. 2 is a schematic cross-sectional view of a preferred sump cover configuration;
in the figure:
1. a main shaft; 2. a condensation chamber; 3. an oil sump cover main body; 3.1, a first oil groove cover plate; 3.1.1, heat dissipation holes; 3.2, a second oil groove cover plate; 3.2.1, a grid-like structure; 4. an inner cavity; 5. a refrigeration source; 6. an oil sump; 7. the wall of the oil tank; 8. a thermal insulation layer; 9. a gap; 10. and (5) sealing the comb teeth.
Detailed Description
Example 1
The embodiment discloses a method for preventing oil mist leakage, which is used as the most basic embodiment of the invention and mainly comprises the following steps:
A. an inner cavity 4 for accommodating cold air is arranged on the oil groove cover main body 3, so that oil mist close to the bottom of the oil groove cover main body 3 is condensed into oil drops to return to the oil groove 6 after heat exchange with cold air in the inner cavity 4;
B. the oil groove cover main body 3 is arranged on the main shaft 1, so that the oil groove cover main body 3 and the main shaft 1 are matched with each other to form a condensation cavity 2, the condensation cavity 2 is communicated with the inner cavity 4, cold air in the inner cavity 4 can spread into the condensation cavity 2, oil mist ascending along the main shaft 1 is condensed into oil drops to return to the oil groove 6, and the oil mist is prevented from leaking out of a gap between the oil groove cover main body 3 and the main shaft 1;
C. a refrigeration source 5 for providing cold air for the inner cavity 4 and creating a low-temperature condition is arranged on the oil groove cover main body 3;
D. the bottom of the oil tank cover main body 3 is provided with a grid-shaped structure 3.2.1, the flow rate of the oil mist is changed by utilizing the grid-shaped structure 3.2.1, the heat exchange rate of the oil mist at the bottom of the oil tank cover main body 3 is increased, and the flow direction of the oil mist is changed by utilizing the grid-shaped structure 3.2.1, so that the oil mist which is not condensed returns to the surface of the main shaft 1 and returns to the oil tank 6 after rebounding through the main shaft 1; the oil mist is prevented from being too much, so that the oil mist is accumulated in the oil groove 6 and risks overflowing.
Example 2
The embodiment discloses a method for preventing oil mist leakage, which is a preferred embodiment of the invention, that is, in embodiment 1, an oil groove cover main body 3 comprises a first oil groove cover plate 3.1 and a second oil groove cover plate 3.2, step a further comprises arranging a heat insulation layer 8 on the first oil groove cover plate 3.1, processing the second oil groove cover plate 3.2 by using an aluminum alloy material, mutually matching the first oil groove cover plate 3.1 and the second oil groove cover plate 3.2 to form an inner cavity 4, and arranging a sealing structure at the radial connection position of the first oil groove cover plate 3.1 and the second oil groove cover plate 3.2 to enable the inner cavity 4 to be in a sealing state; step B also comprises that gaps 9 are arranged at the top of the condensation cavity 2 and the joint of the main shaft 1 and the oil groove cover main body 3, so that cold air can circulate conveniently; a comb seal 10 is arranged at the bottom of the condensation cavity 2 and at the joint of the main shaft 1 and the oil groove cover main body 3 to prevent oil mist from entering the condensation cavity 2; step C, arranging heat dissipation holes 3.1.1 on the oil groove cover main body 3 at the top of the inner cavity 4, arranging the semiconductor refrigerating sheet at the top of the inner cavity 4, enabling the heat dissipation surfaces of the semiconductor refrigerating sheet to completely cover the heat dissipation holes 3.1.1, and arranging a switch for controlling the working state of the semiconductor refrigerating sheet at the top of the oil groove cover main body 3; and the step C also comprises the step of forming an air inlet hole communicated with the inner cavity 4 on the oil groove cover main body 3 and then connecting the refrigerating equipment from the outside of the inner cavity 4 through the air inlet hole.
Example 3
As a basic implementation scheme of the present invention, as shown in fig. 1, the oil tank cover structure mainly includes an oil tank cover main body 3 disposed on a main shaft 1, where the oil tank cover main body 3 includes a first oil tank cover plate 3.1 and a second oil tank cover plate 3.2, and the first oil tank cover plate 3.1, the second oil tank cover plate 3.2 and the main shaft 1 are mutually matched to form a condensation chamber 2; the first oil tank cover plate 3.1 and the second oil tank cover plate 3.2 are matched with each other to form an inner cavity 4 which is used for containing cold air and communicated with the condensation cavity 2, the radial joint of the first oil tank cover plate 3.1 and the second oil tank cover plate 3.2 is provided with a seal, and the inner cavity 4 is in a sealed state; be provided with on oil groove cover main part 3 and be used for doing inner chamber 4 provides air conditioning, creates the refrigeration source 5 of low temperature condition, and refrigeration source 5 is for setting up the semiconductor refrigeration piece in inner chamber 4, is provided with louvre 3.1.1 on the first oil groove apron 3.1, and the cooling surface of semiconductor refrigeration piece sets up in first oil groove apron 3.1 bottom to comprehensively cover louvre 3.1.1.
When the unit works, the relative motion and mutual extrusion of the contact surfaces of the main shaft 1 and the bearing bush continuously generate heat, so that lubricating oil is vaporized to generate oil mist, the oil mist continuously collides in the oil groove 6, rotates at a high speed along with the unit, moves over the oil groove 6 slowly in a centrifugal motion mode in the oil groove 6, is thrown to the oil groove wall 7 from the bearing bush, rises along the oil groove wall 7 and is gradually close to the bottom of the second oil groove cover plate 3.2. The heat absorbing surface of the semiconductor refrigerating sheet absorbs heat in the inner cavity 4 to provide cold air for the inner cavity 4, and then the heat is discharged through the air dispersing hole; most oil mist forms oil drops after heat exchange with cold air in the inner cavity 4 through the second oil groove cover plate 3.2 and returns to the oil groove 6; the inner cavity 4 is communicated with the condensation cavity 2, the cold air spreads into the inner cavity 4, the inner cavity 4 is in a sealed state, and the cold air is prevented from flowing away from the gap 9 to cause insufficient cold air spreading into the condensation cavity 2; a small part of oil mist rises along the main shaft 1, is close to the joint of the main shaft 1 and the oil groove 6 cover, meets the condensation cavity 2 and is condensed into oil drops to return to the oil groove 6.
Example 4
As a preferred embodiment of the present invention, as shown in fig. 2, the oil groove cover structure mainly includes an oil groove cover main body 3 disposed on a main shaft 1, the oil groove cover main body 3 includes a first oil groove cover plate 3.1 and a second oil groove cover plate 3.2, and the first oil groove cover plate 3.1, the second oil groove cover plate 3.2 and the main shaft 1 are mutually matched to form a condensation chamber 2; the first oil tank cover plate 3.1 and the second oil tank cover plate 3.2 are matched with each other to form an inner cavity 4 which is used for containing cold air and communicated with the condensation cavity 2, the radial joint of the first oil tank cover plate 3.1 and the second oil tank cover plate 3.2 is provided with a seal, and the inner cavity 4 is in a sealed state; an air inlet is arranged on the oil tank cover main body 3, refrigeration equipment is connected from the outside to serve as a refrigeration source 5 of the inner cavity 4, and the refrigeration equipment is communicated with the inner cavity 4 through the air inlet; a gap 9 is reserved between the first oil groove cover plate 3.1 and the main shaft 1, and the condensation cavity 2 is communicated with the outside through the gap 9; second oil groove apron 3.2 be provided with broach seal 10 between the main shaft 1.
The refrigerating equipment can be air conditioner, refrigerator and other equipment capable of refrigerating, preferably, the air inlet hole is arranged opposite to the vent hole, and the refrigerating equipment has the advantages that the air cooling spreading direction is clear, and the quality of the air cooling in the condensation cavity 2 and the inner cavity 4 is guaranteed. The benefit of accessing the refrigeration equipment from the outside is that the temperature can be controlled according to the rate at which oil mist is produced; the existing resources are well utilized, if the refrigerator is used as a refrigerating source 5 to be connected into the inner cavity 4, the refrigerator can normally work, the use requirements of general refrigerators are met, and meanwhile the requirements of the scheme are met.
Example 5
This example discloses a structure of a cover of an oil tank 6 for preventing oil mist leakage, which is a preferred embodiment of the present invention, that is, in example 1, a first oil tank cover plate 3.1 is made of a heat insulating material, a second oil tank cover plate 3.2 is made of an aluminum alloy material, and a grid-like structure 3.2.1 for changing the flow direction of oil mist and reducing the flow rate of oil mist is arranged at the bottom of the second oil tank cover plate 3.2.
In the running process of the guide bearing, heat is continuously generated due to the relative movement and mutual extrusion of the contact surfaces of the main shaft 11 and the bearing bushes, so that lubricating oil is vaporized to generate oil mist; the oil mist continuously collides in the oil groove 6, rotates at a high speed along with the group and does centrifugal motion in the oil groove 6; a large amount of oil mist is thrown from the bearing bush to the oil groove wall 7 and then rises along the oil groove wall 7 to gradually approach the bottom of the second oil groove cover plate 3.2, and the grid-shaped structure 3.2.1 can reduce the speed of the oil mist, so that the heat exchange efficiency of the bottom of the second oil groove cover plate 3.2 is improved, and more oil mist is cooled at the bottom of the 6 th plate of the second oil groove; the grid-shaped structure 3.2.1 changes the flow direction of the oil mist, one part of the oil mist is cooled and condensed into oil drops to return to the oil groove 6, the other part of the oil mist is changed in flow direction by the grid-shaped structure 3.2.1 and returns to the surface of the main shaft 1, and the oil mist returns to the oil groove 6 again after rebounding through the main shaft 1, so that the oil mist in the oil tank flows circularly. The grid-like structure 3.2.1 effectively prevents the risk that a part of the oil mist, possibly due to too much oil mist, cannot come close to the bottom of the second tank cover plate 3.2, causing the oil mist to overflow after it has accumulated in the oil tank 6. The second oil groove cover plate 3.2 is made of an aluminum alloy material, so that the second oil groove cover plate has good heat conduction performance and further accelerates the condensation efficiency of oil mist; first oil groove apron 3.1 has the heat preservation function, has guaranteed the low temperature quality of inner chamber 4. The technical scheme utilizes the principle that oil mist is condensed into oil drops when meeting condensation, and adopts cold air to condense the oil mist, so that the oil mist is prevented from overflowing, and meanwhile, the pollution to equipment and the environment is avoided; an air filter does not need to be additionally arranged on the oil tank 6 cover in order to ensure the balance of the internal and external pressure of the oil tank cover and prevent the oil throwing at the oil baffle plate in the oil tank, thereby further avoiding the trouble that the filter is frequently cleaned by air; the production cycle is not suspended due to the replacement of parts, the oil mist is condensed into oil drops to return to the oil groove 6 for reuse, and the waste of manpower and material resources is avoided.
Claims (5)
1. A method for preventing oil mist leakage is characterized in that: the method comprises the following steps:
A. an inner cavity (4) for containing cold air is arranged on the oil groove cover main body (3), so that oil mist close to the bottom of the oil groove cover main body (3) is condensed into oil drops to return to the oil groove (6) after heat exchange with cold air in the inner cavity (4);
B. the oil groove cover main body (3) is arranged on the main shaft (1), so that the oil groove cover main body (3) and the main shaft (1) are matched with each other to form a condensation cavity (2), the condensation cavity (2) is communicated with the inner cavity (4), cold air in the inner cavity (4) can spread into the condensation cavity (2), oil mist rising along the main shaft (1) is condensed into oil drops to return to the oil groove (6), and the oil mist is prevented from leaking out from a gap between the oil groove cover main body (3) and the main shaft (1);
C. a refrigeration source (5) for providing cold air for the inner cavity (4) and creating a low-temperature condition is arranged on the oil groove cover main body (3);
D. the bottom of the oil groove cover main body (3) is provided with a grid-shaped structure (3.2.1), the flow velocity of the oil mist is changed by utilizing the grid-shaped structure (3.2.1), the heat exchange rate of the oil mist at the bottom of the oil groove cover main body (3) is increased, meanwhile, the flow direction of the oil mist is changed by utilizing the grid-shaped structure (3.2.1), the oil mist which is not condensed returns to the surface of the main shaft (1), and returns to the oil groove (6) after rebounding through the main shaft (1); the oil mist is prevented from being excessive, so that the oil mist is accumulated in the oil groove (6) and risks of overflowing are avoided.
2. The method for preventing oil mist leakage according to claim 1, characterized in that: oil groove lid main part (3) include first oil groove apron (3.1) and second oil groove apron (3.2), step A still includes and sets up insulating layer (8) on first oil groove apron (3.1), chooses for use aluminium alloy material to process into second oil groove apron (3.2), makes first oil groove apron (3.1) and second oil groove apron (3.2) mutually support again and forms inner chamber (4) to set up seal structure in the radial junction of first oil groove apron (3.1) and second oil groove apron (3.2), make inner chamber (4) be in encapsulated situation.
3. The method for preventing oil mist leakage according to claim 1, characterized in that: the step B also comprises the step of arranging gaps (9) at the top of the condensation cavity (2) and the joint of the main shaft (1) and the oil groove cover main body (3) so as to facilitate the circulation of cold air; comb tooth seals (10) are arranged at the bottoms of the condensation cavities (2) and the joints of the main shaft (1) and the oil groove cover main body (3) to prevent oil mist from entering the condensation cavities (2).
4. The method for preventing oil mist leakage according to claim 1, characterized in that: and the step C also comprises the steps of arranging heat dissipation holes (3.1.1) on the oil groove cover main body (3) at the top of the inner cavity (4), arranging the semiconductor refrigeration piece at the top of the inner cavity (4), enabling the heat dissipation surface of the semiconductor refrigeration piece to completely cover the heat dissipation holes (3.1.1), and arranging a switch for controlling the working state of the semiconductor refrigeration piece at the top of the oil groove cover main body (3).
5. The method for preventing oil mist leakage according to claim 1, characterized in that: and the step C also comprises the step of forming an air inlet hole communicated with the inner cavity (4) on the oil groove cover main body (3), and then connecting the refrigerating equipment from the outside of the inner cavity (4) through the air inlet hole.
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| CN202266363U (en) * | 2011-09-30 | 2012-06-06 | 东方电气集团东方电机有限公司 | Oil tank cap capable of preventing oil mist |
| CN202545816U (en) * | 2012-05-10 | 2012-11-21 | 中国长江电力股份有限公司 | Guide bearing oil groove sealing structure of rotary machinery |
| CN106838588A (en) * | 2016-12-19 | 2017-06-13 | 四川白合轴承技术有限公司 | A kind of leading-type oil mist sealing method |
| CN107100999A (en) * | 2017-05-27 | 2017-08-29 | 李荣耀 | Mirror oil centrifugal seal device |
| CN108167441A (en) * | 2018-02-08 | 2018-06-15 | 张宏伟 | Generator shaft seals and area from absorbing smoke outwards structure |
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| CN110553035A (en) | 2019-12-10 |
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