CN115325144A - Novel oil leakage prevention speed reducer ventilation device and use method - Google Patents

Novel oil leakage prevention speed reducer ventilation device and use method Download PDF

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Publication number
CN115325144A
CN115325144A CN202210962936.7A CN202210962936A CN115325144A CN 115325144 A CN115325144 A CN 115325144A CN 202210962936 A CN202210962936 A CN 202210962936A CN 115325144 A CN115325144 A CN 115325144A
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CN
China
Prior art keywords
oil
speed reducer
oil return
short circuit
pipe
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CN202210962936.7A
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Chinese (zh)
Inventor
黄勇
马龙
王春民
王轩
边技超
王浩楠
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Beijing Power Equipment Group Co ltd
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Beijing Power Equipment Group Co ltd
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Priority to CN202210962936.7A priority Critical patent/CN115325144A/en
Publication of CN115325144A publication Critical patent/CN115325144A/en
Pending legal-status Critical Current

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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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/02—Gearboxes; Mounting gearing therein
    • F16H57/027—Gearboxes; Mounting gearing therein characterised by means for venting gearboxes, e.g. air breathers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/02—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising gravity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/04—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia
    • B01D45/08—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/042—Guidance of lubricant
    • F16H57/0421—Guidance of lubricant on or within the casing, e.g. shields or baffles for collecting lubricant, tubes, pipes, grooves, channels or the like
    • F16H57/0423—Lubricant guiding means mounted or supported on the casing, e.g. shields or baffles for collecting lubricant, tubes or pipes
    • 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
    • F16H—GEARING
    • F16H57/00—General details of gearing
    • F16H57/04—Features relating to lubrication or cooling or heating
    • F16H57/0457—Splash lubrication

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Fluid-Pressure Circuits (AREA)
  • General Details Of Gearings (AREA)

Abstract

A novel speed reducer of leak protection oil is ventilated device, it includes: the oil carried in the exhaust process flows back to the speed reducer through the blocking of the short circuits and the filtering of the C-shaped air filter and finally through the oil return pipe. The speed reducer ventilating device disclosed by the invention utilizes the advantages of universality and easiness in obtaining of the C-shaped air filter, and makes up the defect of easiness in oil leakage of the conventional C-shaped air filter. The device is particularly suitable for the working condition that a speed reducer of a dynamic separator similar to a coal mill runs in a dust environment and sealed air is introduced. The speed reducer under the working condition can smoothly exhaust and effectively prevent lubricating oil from splashing or being discharged along with gas to pollute the environment.

Description

Novel oil leakage prevention speed reducer ventilation device and use method
Technical Field
The invention relates to the technical field of speed reducer ventilation devices, in particular to a novel oil leakage prevention speed reducer ventilation device and a use method thereof.
Background
In the running process of the speed reducer, the gear pair rotates at a high speed to stir lubricating oil, so that the lubricating oil level is changed in height fluctuation and the oil is splashed. After the lubricating oil is mixed with air, bubbles can be generated under the stirring of the gear pair, so that the volume of the lubricating oil is increased. Gear pair in the speed reducer can produce the heat when high-speed rotation, leads to lubricating oil temperature to rise, and gear pair stirs lubricating oil and also can lead to lubricating oil temperature to rise, makes the gas expansion in the speed reducer, and pressure rising when reaching a definite value with external atmospheric pressure difference, lubricating oil can spill from the faying face department of speed reducer box under the effect of pressure difference. To avoid this, a breather is generally attached to the reduction gear to balance the internal and external pressures of the reduction gear.
In a powder making system of a thermal power plant, a gear reducer for driving a rotor to rotate on a coal mill rotary separator needs to be communicated with sealing air with certain pressure and flow to isolate coal powder in the coal mill, so that the coal powder is prevented from entering the interior of the reducer for driving the rotor and polluting lubricating oil. Part of sealing wind inevitably breaks through the sealing of the speed reducer and enters the speed reducer, so that the internal pressure of the speed reducer is further increased. In this case, the conventional ventilation device cannot effectively isolate the lubricating oil carried by the gas during the exhaust, so that the lubricating oil overflows or is exhausted along with the gas, and the surrounding environment of the speed reducer is polluted.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a novel speed reducer ventilating device capable of preventing oil leakage and a using method thereof.
The invention adopts the following technical scheme:
the utility model provides a novel speed reducer of leak protection oil is ventilated device, it includes: the mounting flange is of a circular flange structure, a circular hole is formed in the center of the mounting flange, and the lower end of the hole plate type short circuit is inserted into the circular hole of the mounting flange and is welded with the hole plate type short circuit; the upper end of the orifice plate type short joint is in butt welding connection with the lower end of the zigzag labyrinth pipe, and the upper end of the zigzag labyrinth pipe is in welding connection with the lower end of the oil-blocking short joint; the volume-expanding type outer shell is sleeved on the outer sides of the zigzag labyrinth tube and the oil-blocking short circuit, the diameter of the outer shell is larger than the maximum diameter of the zigzag labyrinth tube and the oil-blocking short circuit, the lower side end of the outer shell is welded with the middle part of the zigzag labyrinth tube, the upper oil-accumulating plane of the outer shell is provided with a C-shaped air filter interface for connecting a C-shaped air filter, and the interface position is lower than the uppermost end of the volume-expanding type outer shell; the upper oil return plane of the expansion type shell is welded with the upper end of an upper oil return pipe, the other end of the upper oil return pipe penetrates through the lower oil return plane of the expansion type shell and the shell with the orifice plate type short circuit, and the tail end of the upper oil return pipe is welded with the central oil return short circuit; the lower oil return plane of the expansion type shell is welded with the upper end of the lower oil return pipe, the other end of the lower oil return pipe penetrates through the shell of the orifice plate type short joint, and the tail end of the lower oil return pipe is welded with the central oil return short joint; the upper end of the central oil return short circuit is welded at the center of a top plate of the orifice plate type short circuit, the lower end of the central oil return short circuit is connected with the upper end of the detachable main oil return pipe, and the tail end of the detachable main oil return pipe is immersed under lubricating oil liquid of the speed reducer.
As a preferred embodiment of the invention, the zigzag labyrinth tube is formed by assembling and welding a plurality of labyrinth short joints which are connected end to end.
In a preferred embodiment of the present invention, a plurality of layers of filter screens are further disposed in the C-shaped air cleaner interface of the expandable casing.
In a preferred embodiment of the present invention, the C-shaped air filter is connected to the expandable casing by a screw.
In a preferred embodiment of the present invention, a double-layer dust cap is mounted on the top of the C-type air cleaner by using a wing nut.
As a preferred embodiment of the present invention, the outer diameter of the inner sleeve of the double-layer dust cover is smaller than the inner diameter of the expandable outer shell, the inner diameter of the outer sleeve is larger than the outer diameter of the expandable outer shell, the inner sleeve is longer than the outer sleeve, and the inner sleeve and the outer sleeve cooperate with the expandable outer shell to form a tortuous path.
As a preferred embodiment of the invention, the C-type air filter is a JB/ZQ4522 standard component or a substitute product thereof.
As a preferred embodiment of the present invention, the central oil return short circuit is connected to the detachable main oil return pipe through a straight pipe joint during welding.
As a preferred embodiment of the present invention, the lower end of the central oil return short joint is closed and provided with a welded straight-through pipe joint.
In a preferred embodiment of the present invention, the welded straight-through pipe joint is welded to the upper end of the detachable main oil return pipe.
In a preferred embodiment of the present invention, the ventilation device is mounted to the top end of the speed reducer by a mounting flange.
The use method of the novel oil leakage prevention speed reducer ventilating device comprises the following steps:
step 1), stirring lubricating oil when a gear pair in a speed reducer rotates at a high speed, so that the lubricating oil level generates high-low fluctuation and oil splashing, part of the lubricating oil rushes into a ventilation device due to the fluctuation of the lubricating oil level and is discharged outwards along with gas, part of the oil reflows to an oil tank in the process of blocking by a hole plate type short joint and a zigzag labyrinth pipe, and part of the oil flows into an expansion-type shell along with the gas through a vent hole of the hole plate type short joint, the zigzag labyrinth pipe and a vent hole of an oil blocking short joint and is influenced by gravity, flows to a lower oil accumulation plane of the expansion-type shell along the pipe wall and then returns to the oil tank through a lower oil return pipe, a central oil return short joint, a welded straight-through pipe joint and a detachable main oil return pipe;
step 2), when a gear pair in the speed reducer rotates at a high speed, heat is generated to cause the temperature of lubricating oil to rise, and the gear pair stirs the lubricating oil to also cause the temperature of the lubricating oil to rise, so that gas in the speed reducer expands, the pressure rises, the expanded gas carries oil drops to pass through the orifice-plate short circuit of the exhaust device and the blockage of the zigzag labyrinth pipe, the oil drops enter the expansion-type shell, the flow rate of the expanded gas is reduced due to the increase of the flow area, the capacity of the gas for carrying the oil drops is reduced, part of the oil drops are carried by airflow to pass through the filter screen to the C-type air filter, a filter element is arranged in the C-type air filter, the oil drops which cannot pass through the filter element are blocked and settled on an upper oil accumulation platform of the expansion-type shell, the oil drops which pass through the filter element enter the double-layer dustproof cover in a detachable mode, the resistance is large due to the sudden expansion of the gas flow area in the double-layer dustproof cover, the flow rate is reduced, the oil drops settle on the upper oil accumulation platform of the double-layer dustproof cover, and then return oil returns to the oil tank through the upper oil return pipe center short circuit, the welded type straight-through pipe joint and the total oil return pipe.
In a preferred embodiment of the invention, the filter element of the C-type air filter can block oil drops larger than 40 microns, and oil smaller than 40 microns can pass through the filter element.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a novel oil leakage prevention speed reducer ventilating device, wherein lubricating oil can be stirred when a gear pair in a speed reducer rotates at a high speed, so that the oil level of the lubricating oil fluctuates and the oil splashes, and the fluctuation of the oil level of the lubricating oil can cause part of the lubricating oil to flow into the ventilating device and be discharged along with gas. In the process, part of oil liquid flows back to the oil tank through the blocking of the orifice plate type short circuit and the zigzag type labyrinth pipe, and the orifice plate and the labyrinth structure of the device can effectively block splashed lubricating oil so that most of the splashed lubricating oil returns to the oil tank.
The device can effectively block splashed lubricating oil and oil drops carried by gas. The gas carries little oil to drip through the orifice plate formula short circuit of exhaust apparatus and the blockking of zigzag type labyrinth pipe, gets into the dilatation formula shell, because through-flow area increases, the gas flow rate slows down, makes the gas carry the ability decline of dripping, makes oil drip subside, and the filter core of filter screen and C type air cleaner department can further block that little oil drips and along with gas outgoing. The design of the double-layer anti-layer cover can isolate dust, and can form a tortuous path with the expansion type shell, so that airflow resistance is further provided, and oil drops are settled.
The device creates a novel structure of the through hole plate type short circuit, the zigzag labyrinth short pipe, the expansion type shell and the like, and is combined with the conventional air filter, the advantages of universality and easiness in acquisition of the conventional air filter are utilized, and the defect of easiness in oil leakage of the conventional air filter is overcome. The device is particularly suitable for the working condition that a speed reducer of a dynamic separator similar to a coal mill runs in a high-temperature and high-pressure dust environment and sealed air is introduced. The speed reducer under the working condition can smoothly exhaust and balance internal and external pressure of the speed reducer, and effectively block lubricating oil, so that the lubricating oil entering the ventilating device can flow back into the box body of the speed reducer, and the lubricating oil drops are prevented from being discharged along with gas to pollute the environment.
Drawings
Fig. 1 is a schematic structural view of a novel oil leakage prevention speed reducer breather device of the invention;
FIG. 2 is an example of the present invention in a coal pulverizer dynamic separator reducer;
in the figure:
1-mounting flange, 2-hole plate type short circuit, 3-zigzag labyrinth tube, 4-lower oil return tube, 5-expansion type shell, 6-oil blocking short circuit, 7-double layer dust cap, 8-C type air filter, 9-filter screen, 10-upper oil return tube, 11-central oil return short circuit, 12-welding type straight-through tube joint and 13-detachable total oil return tube.
Detailed Description
The present application is further described below with reference to the accompanying drawings. The following examples are only used to illustrate the technical solutions of the present invention more clearly, and the protection scope of the present application is not limited thereby.
Fig. 1 is a schematic structural diagram of a novel oil leakage prevention speed reducer ventilation device of the present invention, fig. 2 is an example of practical application of the present invention to a dynamic separator speed reducer of a coal pulverizer, and as shown in fig. 1, the novel oil leakage prevention speed reducer ventilation device of the present invention includes a mounting flange 1, a hole plate type short circuit 2, and an expansion type housing 5.
The mounting flange 1 is of a circular flange structure, a circular hole is formed in the center of the mounting flange, the lower end of the orifice plate type short circuit 2 is inserted into the circular hole of the mounting flange 1 and is in welded connection with the orifice plate type short circuit, the upper end of the orifice plate type short circuit 2 is in butt welded connection with the lower end of the zigzag labyrinth pipe 3, and the upper end of the zigzag labyrinth pipe 3 is in welded connection with the lower end of the oil-blocking short circuit 6.
Dilatation formula shell 5 cup joints in zigzag labyrinth pipe 3 and hinders the outside of oil short circuit 6, and its shell diameter is greater than zigzag labyrinth pipe 3 and hinders the maximum diameter of oil short circuit 6, and its lower side end and zigzag labyrinth pipe 3's middle part welded connection, its upper portion oil accumulation plane are provided with C type air cleaner interface for connect C type air cleaner 8, and the interface position is less than the top of dilatation formula shell.
Last oil return plane of dilatation formula shell 5 and the upper end welded connection who goes back oil pipe 10, go up the other end that returns oil pipe 10 and pass the lower oil return plane of dilatation formula shell 5 and the shell of orifice plate formula short circuit 2, its end and 11 welded connection of central oil return short circuit, the lower oil return plane of dilatation formula shell 5 and the upper end welded connection who returns oil pipe 4 down, the other end that returns oil pipe 4 down passes the shell of orifice plate formula short circuit 2, its end and 11 welded connection of central oil return short circuit.
The upper end of the central oil return short circuit 11 is welded at the center of a top plate of the orifice plate type short circuit 2, the lower end of the central oil return short circuit is connected with the upper end of the detachable main oil return pipe 13, and the tail end of the detachable main oil return pipe 13 is immersed under lubricating oil liquid of the speed reducer.
The zigzag labyrinth tube 3 is formed by assembling and welding a plurality of end-to-end labyrinth short joints. .
And a multi-layer filter screen 9 is also arranged in the C-shaped air filter interface of the expansion type shell 5.
C type air cleaner 8 and dilatation formula shell 5 adopt threaded connection, and double-deck shield 7 is installed to the top of C type air cleaner 8 adoption butterfly nut.
The outer diameter of the inner sleeve of the double-layer dustproof cover 7 is smaller than the inner diameter of the expansion-type shell 5, the inner diameter of the outer sleeve is larger than the outer diameter of the expansion-type shell 5, the inner sleeve is longer than the outer sleeve, and the inner sleeve, the outer sleeve and the expansion-type shell 5 are matched to form a tortuous passage.
The C-type air filter 8 is a JB/ZQ4522 standard component or a substitute product thereof.
The central oil return short joint 11 is connected with the detachable main oil return pipe 13 through the straight-through pipe joint 12 during welding, the lower end of the central oil return short joint 11 is closed and provided with the welded straight-through pipe joint 12, and the welded straight-through pipe joint 12 is welded with the upper end of the detachable main oil return pipe 13.
The ventilating device is installed at the top end of the speed reducer through an installation flange 1.
The use method of the novel oil leakage prevention speed reducer ventilating device comprises the following steps:
step 1), stirring lubricating oil when a gear pair in a speed reducer rotates at a high speed, so that the oil level of the lubricating oil fluctuates and the oil splashes, wherein part of the lubricating oil rushes into a ventilation device due to fluctuation of the oil level of the lubricating oil and is discharged outwards along with gas, and in the process, part of the oil flows back to an oil tank through blocking of a hole plate type short circuit 2 and a zigzag type labyrinth pipe 3 and blocking of an oil blocking short circuit 6, and part of the oil flows into a lower oil accumulation plane of an expansion type shell 5 along the pipe wall and then returns to the oil tank through a lower oil return pipe 4, a central oil return short circuit 11, a welded straight-through pipe joint 12 and a detachable total oil return pipe 13 after passing through a vent hole plate type short circuit 2 and a vent hole of the zigzag type labyrinth pipe 3 and blocking of the oil blocking short circuit 6;
step 2), when a gear pair in the speed reducer rotates at a high speed, heat is generated, so that the temperature of lubricating oil is increased, and the temperature of the lubricating oil is also increased when the gear pair stirs the lubricating oil, so that the gas in the speed reducer expands, the pressure is increased, the expanded gas carries oil drops to pass through the orifice plate type short circuit 2 of the exhaust device and the blockage of the zigzag labyrinth pipe 3, and then the oil drops enter the expansion type shell 5, because the flow area is increased, the flow rate of the expanded gas is reduced, part of the oil drops settle, and part of the oil drops are carried by airflow to pass through the filter screen 9 to the C-type air filter 8, a filter element is arranged in the C-type air filter 8, the oil drops which cannot pass through the filter element are blocked and settled on an upper oil accumulation platform of the expansion type shell 5, the oil drops which pass through the filter element enter the double-layer dustproof cover 7, because the flow area is suddenly expanded in the double-layer dustproof cover 7, the resistance is large, the flow rate is reduced, and the oil drops settle on the upper oil accumulation platform of the expansion type shell 5 in the upper oil return pipe center of the upper oil return pipe 11, and the welded type short circuit pipe joint 12, and the total oil return pipe 13 returns to the oil return.
The filter element of the C-type air filter 8 can block oil drops larger than 40 microns, and oil smaller than 40 microns can pass through the filter element.
Compared with the prior art, the invention has the beneficial effects that:
the invention discloses a novel oil leakage prevention speed reducer ventilating device, wherein lubricating oil can be stirred when a gear pair in a speed reducer rotates at a high speed, so that the oil level of the lubricating oil fluctuates and the oil splashes, and the fluctuation of the oil level of the lubricating oil can cause part of the lubricating oil to flow into the ventilating device and be discharged along with gas. In the process, part of oil liquid flows back to the oil tank through the blocking of the orifice plate type short circuit and the zigzag type labyrinth pipe, and the orifice plate and the labyrinth structure of the device can effectively block splashed lubricating oil so that most of the splashed lubricating oil returns to the oil tank.
The device can effectively block splashed lubricating oil and oil drops carried by gas. The gas carries little oil to drip through the orifice plate formula short circuit of exhaust apparatus and the blockking of zigzag type labyrinth pipe, gets into the dilatation formula shell, because through-flow area increases, the gas flow rate slows down, makes the gas carry the ability decline of dripping, makes oil drip subside, and the filter core of filter screen and C type air cleaner department can further block that little oil drips and along with gas outgoing. The design of the double-layer anti-layer cover can isolate dust, and can form a tortuous path with the expansion type shell, so that airflow resistance is further provided, and oil drops are settled.
The novel structure of the device, such as the through hole plate type short circuit, the zigzag type labyrinth short pipe and the expansion type shell, is combined with the conventional air filter, the advantages of the conventional air filter, such as universality and easiness in acquisition, are utilized, and the defect of easiness in oil leakage of the conventional air filter is overcome. The device is particularly suitable for the working conditions that a speed reducer similar to a dynamic separator of a coal mill runs in a high-temperature and high-pressure dust environment and sealed air is introduced. The speed reducer under the working condition can smoothly exhaust and balance the internal and external pressure of the speed reducer, and effectively block lubricating oil, so that the lubricating oil entering the ventilating device can flow back into the box body of the speed reducer, and the lubricating oil drops are prevented from being discharged along with gas to pollute the environment.
The present applicant has described and illustrated embodiments of the present invention in detail with reference to the accompanying drawings, but it should be understood by those skilled in the art that the above embodiments are merely preferred embodiments of the present invention, and the detailed description is only for the purpose of helping the reader to better understand the spirit of the present invention, and not for limiting the scope of the present invention, and on the contrary, any improvement or modification made based on the spirit of the present invention should fall within the scope of the present invention.

Claims (10)

1. The utility model provides a novel speed reducer of leak protection oil is ventilated device, it includes: mounting flange (1), orifice plate formula short circuit (2) and dilatation formula shell (5), its characterized in that:
the mounting flange (1) is of a circular flange structure, a circular hole is formed in the center of the mounting flange, and the lower end of the orifice plate type short circuit (2) is inserted into the circular hole of the mounting flange (1) and is welded with the mounting flange;
the upper end of the orifice plate type short joint (2) is in butt welding connection with the lower end of the zigzag labyrinth pipe (3), and the upper end of the zigzag labyrinth pipe (3) is in welding connection with the lower end of the oil-blocking short joint (6);
the expansion type shell (5) is sleeved on the outer sides of the zigzag labyrinth pipe (3) and the oil-blocking short circuit (6), the diameter of the shell is larger than the maximum diameter of the zigzag labyrinth pipe (3) and the oil-blocking short circuit (6), the lower side end of the shell is welded with the middle part of the zigzag labyrinth pipe (3), a C-shaped air filter interface is arranged on an oil accumulation plane on the upper part of the shell and used for being connected with a C-shaped air filter (8), and the interface position is lower than the uppermost end of the expansion type shell;
the upper oil return plane of the expansion type shell (5) is connected with the upper end of an upper oil return pipe (10) in a welding mode, the other end of the upper oil return pipe (10) penetrates through the lower oil return plane of the expansion type shell (5) and the shell of the orifice plate type short circuit (2), and the tail end of the upper oil return pipe is connected with the central oil return short circuit (11) in a welding mode;
the lower oil return plane of the expansion type shell (5) is welded with the upper end of the lower oil return pipe (4), the other end of the lower oil return pipe (4) penetrates through the shell of the orifice plate type short circuit (2), and the tail end of the lower oil return pipe is welded with the central oil return short circuit (11);
the upper end of the central oil return short circuit (11) is welded at the center of a top plate of the orifice plate type short circuit (2), the lower end of the central oil return short circuit is connected with the upper end of the detachable main oil return pipe (13), and the tail end of the detachable main oil return pipe (13) is immersed under lubricating oil liquid of the speed reducer.
2. The novel oil-leakage-preventing speed reducer ventilating device according to claim 1, characterized in that:
the zigzag labyrinth tube (3) is formed by assembling and welding a plurality of labyrinth short joints which are connected end to end.
3. The novel oil-leakage-preventing speed reducer ventilating device according to claim 1, characterized in that:
and a multi-layer filter screen (9) is further arranged in the C-shaped air filter interface of the expansion type shell (5).
4. The novel oil leakage prevention speed reducer ventilating device according to claim 3, characterized in that:
the C-shaped air filter (8) is connected with the expansion type shell (5) through threads;
the top of the C-shaped air filter (8) is provided with a double-layer dustproof cover (7) by adopting a butterfly nut.
5. The novel oil-leakage-preventing speed reducer ventilating device according to claim 4, characterized in that:
the outer diameter of the inner sleeve of the double-layer dustproof cover (7) is smaller than the inner diameter of the expansion type shell (5), the inner diameter of the outer sleeve is larger than the outer diameter of the expansion type shell (5), the inner sleeve is longer than the outer sleeve, and the inner sleeve and the outer sleeve are matched with the expansion type shell (5) to form a tortuous path.
6. The novel oil leakage prevention speed reducer ventilating device according to claim 1, characterized in that:
the C-type air filter (8) is a JB/ZQ4522 standard component or a substitute product thereof.
7. The novel oil-leakage-preventing speed reducer ventilating device according to claim 1, characterized in that:
the central oil return short joint (11) is connected with the detachable main oil return pipe (13) through a straight-through pipe joint (12) during welding;
the lower end of the central oil return short circuit (11) is closed and is provided with a welded straight-through pipe joint (12);
the welded straight-through pipe joint (12) is welded and connected with the upper end of the detachable main oil return pipe (13).
8. The novel oil-leakage-preventing speed reducer ventilating device according to claim 1, characterized in that:
the ventilating device is installed at the top end of the speed reducer through an installation flange (1).
9. A use method of the novel oil leakage prevention speed reducer ventilating device as claimed in claims 1 to 8, characterized in that:
the method comprises the following steps:
step 1), stirring lubricating oil when a gear pair in a speed reducer rotates at a high speed, so that the oil level of the lubricating oil fluctuates and the oil splashes, wherein part of the lubricating oil rushes into a ventilation device due to fluctuation of the oil level of the lubricating oil and is discharged outwards along with gas, and in the process, part of the oil flows back to an oil tank through blocking of a hole plate type short circuit (2) and a zigzag type labyrinth pipe (3) and blocking of an oil blocking short circuit (6), and flows into a volume expansion type shell (5) through a vent hole of the hole plate type short circuit (2) and a vent hole of the zigzag type labyrinth pipe (3) and blocking of the oil blocking short circuit (6), and flows to a lower oil accumulation plane of the volume expansion type shell (5) along the pipe wall and then flows back to the oil tank through a lower oil return pipe (4), a central oil return short circuit (11), a welded straight-through pipe joint (12) and a detachable total oil return pipe (13);
step 2), when a gear pair in the speed reducer rotates at a high speed, heat is generated, the temperature of lubricating oil is increased, the temperature of the lubricating oil is increased when the gear pair stirs the lubricating oil, the gas in the speed reducer is expanded, the pressure is increased, the expanded gas carries small oil drops to pass through the orifice plate type short circuit (2) of the exhaust device and the blocking of the zigzag labyrinth pipe (3), the small oil drops enter the expansion type shell (5), the flow area of the expanded gas is increased, the flow speed of the expanded gas is reduced, the capacity of the gas for carrying the oil drops is reduced, partial oil drops are settled, partial oil drops are carried through the airflow to pass through the filter screen (9) to the C type air filter (8), a filter element is arranged in the C type air filter (8), the oil drops which cannot pass through the filter element are blocked and settled on an upper oil accumulation platform of the expansion type shell (5), the oil drops which pass through the filter element enter the double-layer dust cover (7), the flow area of the gas in the double-layer dust cover (7) is sharply enlarged, the flow speed is reduced, the small oil drops settle on the upper oil accumulation platform of the expansion type shell (5) in the double-layer dust cover (7), and then the oil return pipe joint (11) is welded to return oil return pipe, and the oil return pipe (11) and the oil return pipe is connected with the oil return pipe and the oil return pipe.
10. The use method of the novel oil-leakage-preventing speed reducer ventilating device according to claim 9, is characterized in that:
the filter element of the C-shaped air filter (8) can block oil drops larger than 40 micrometers, and oil smaller than 40 micrometers can pass through the filter element.
CN202210962936.7A 2022-08-11 2022-08-11 Novel oil leakage prevention speed reducer ventilation device and use method Pending CN115325144A (en)

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Application Number Priority Date Filing Date Title
CN202210962936.7A CN115325144A (en) 2022-08-11 2022-08-11 Novel oil leakage prevention speed reducer ventilation device and use method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210962936.7A CN115325144A (en) 2022-08-11 2022-08-11 Novel oil leakage prevention speed reducer ventilation device and use method

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CN115325144A true CN115325144A (en) 2022-11-11

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Application Number Title Priority Date Filing Date
CN202210962936.7A Pending CN115325144A (en) 2022-08-11 2022-08-11 Novel oil leakage prevention speed reducer ventilation device and use method

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