CN213712004U

CN213712004U - Oil leakage prevention breather valve device of rotary mechanical bearing box

Info

Publication number: CN213712004U
Application number: CN202022542166.XU
Authority: CN
Inventors: 文丰正
Original assignee: Datang Guiguan Heshan Power Generation Co Ltd
Current assignee: Datang Guiguan Heshan Power Generation Co Ltd
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-07-16
Anticipated expiration: 2030-11-06

Abstract

The utility model discloses a leak protection oil breather valve device of rotation mechanical bearing case, include: 150 mm-250 mm valve tube, respirator and filter layer; the respiratory mask comprises an inner barrel and an outer barrel; the side wall of the inner cylinder is provided with a plurality of exhaust holes; the filter layer is detachably arranged in the valve pipe, and the diameter of the filter layer is smaller than the inner diameter of the valve pipe; the utility model has the advantages of exquisite structure, convenient operation and convenient inner core disassembly; can prevent that lubricating oil from leaking or breather valve from blockking up in high efficiency filtration, the oil reservoir that condenses, supporting inner core can play the effect of interim increase breather valve pressure, prevents the blowout.

Description

Oil leakage prevention breather valve device of rotary mechanical bearing box

Technical Field

The utility model relates to a mechanical valve equipment field. More specifically, the utility model relates to an oil leak protection breather valve device of rotating machinery bearing box.

Background

After the rotating machinery runs for a long time, abrasion can be generated between the shaft and the end cover of the bearing box, so that the oil leakage is increased by the gap between the shaft and the end cover of the bearing box, the original breather valve is directly installed on the bearing box, the designed length of the original breather valve is too short and is generally 50mm long, and no oil condensation layer, filter layer and waterproof device are arranged, so that the original breather valve can only play a role in exhausting and releasing pressure, and the oil leakage phenomenon is relatively common.

When the rotating machinery runs for a long period, the bearing rotates to drive lubricating oil to rotate in the bearing box, certain heat is generated due to the rotation of the bearing and the friction of the lubricating oil, the temperature of the lubricating oil in the running process is generally between 40 and 60 ℃, at the moment, oil gas is generated due to the disturbance and heating of the lubricating oil, the oil gas is discharged into the atmosphere along a breather valve channel to balance the internal pressure and the external pressure of the bearing box, is condensed on the outer wall of the breather valve and flows downwards under the action of gravity to form oil leakage, and finally, the amount of the lubricating oil in the bearing box is gradually reduced, and the environment is polluted to influence the field civilized production;

in order to eliminate oil leakage, it is common practice to replace the bearing housing end caps or shafts to reduce the clearances, which is too costly and does not completely eliminate the oil leakage.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to solve at least the above problems and to provide at least the advantages which will be described later.

The utility model also aims to provide an oil leakage prevention breather valve device of a rotary mechanical bearing box, which has the advantages of exquisite structure, convenient operation and convenient inner core disassembly and assembly; can prevent that lubricating oil from leaking or breather valve from blockking up in high efficiency filtration, the oil reservoir that condenses, supporting inner core can play the effect of interim increase breather valve pressure, prevents the blowout.

To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided an oil leakage preventing breather valve device of a rotary machine bearing housing, including:

the valve pipe is 150-250 mm long; the lower part of the outer wall of the valve pipe is provided with external threads which are matched with the threads of a bearing box to be installed;

the respiratory mask is coaxially covered at the upper end of the valve pipe; the respiratory mask comprises an inner cylinder fixedly connected with the valve pipe and an outer cylinder coaxially sleeved with the inner cylinder, wherein the outer wall of the inner cylinder is abutted against the inner wall of the outer cylinder, the lower bottom surface of the inner cylinder is sealed and connected with the outer wall of the valve pipe, the upper top surface of the outer cylinder is sealed, a plurality of exhaust holes are uniformly formed in the side wall of the inner cylinder at intervals along the circumferential direction, and the length of the outer cylinder is greater than that of the inner cylinder;

wherein, a detachable filter layer which is horizontally arranged is embedded on the inner pipe wall of the valve pipe close to the upper end part of the valve pipe, and the diameter of the filter layer is smaller than the inner diameter of the valve pipe;

the specific structure of the filter layer is a cylindrical structure without top sealing, the bottom surface of the filter layer is a rigid filter screen, the outer wall of the side wall of the filter layer is provided with a bulge, and the inner wall of the valve tube is provided with a groove matched with the bulge;

and sealing treatment is carried out by fine machining above the external threads on the outer wall of the valve pipe.

Preferably, the screen holes of the rigid filter screen are in the shape of barbs arranged at intervals, and the barbs of adjacent screen holes are oppositely oriented.

Preferably, an oil collecting layer is arranged right below the filter layer, and the oil collecting layer comprises:

the collecting cover is horizontally arranged below the rigid filtering screen and is of a flexible layered structure, the extended vertical projection is superposed with the inner section of the valve pipe, and the side wall of the collecting cover is abutted against the inner wall of the valve pipe; unidirectional air holes are uniformly arranged on the collecting cover at intervals, and semi-closed blocking pieces are arranged on each unidirectional air hole on one surface of the collecting cover facing the breathing cover; a fixing hole is formed in the center of the collecting cover, and a fixing ring is arranged along the circumferential direction of the fixing hole;

the supporting rod is a hollow rod body; a through limiting hole is formed in the center of the rigid filtering screen, and the support rod penetrates through the limiting hole to extend to the position below the rigid filtering screen and is coaxially and fixedly connected with the fixing ring; the wall of the supporting rod is provided with a stop hole, a limiting piece is movably embedded in the stop hole, the limiting piece is connected with the inner wall of the supporting rod through a compression spring, the limiting piece extends out of the stop hole when the compression spring extends, and the limiting piece is positioned in the supporting rod when the compression spring contracts; the limiting piece comprises an arc-shaped first limiting part and a wedge-shaped second limiting part positioned below the first limiting part; a stop plate is coaxially sleeved above the stop hole of the supporting rod, and the diameter of the stop plate is larger than that of the limiting hole;

a slide assembly, comprising: the sliding block is coaxially sleeved with the supporting rod, and a clamping groove corresponding to the second limiting part of the limiting sheet is formed in the sliding block; a rebound spring is coaxially sleeved on the supporting rod between the sliding block and the fixing ring; a plurality of groups of folding mechanisms which are arranged in the circumferential direction are arranged among the sliding block, the fixing ring and the collecting cover; the folding mechanism includes: a first connecting rod is hinged with the sliding block, and the other end of the first connecting rod is hinged with a radius trisection point of the collection cover close to the center of the collection cover; a second connecting rod corresponding to the first connecting rod is arranged on the fixing ring, and the other end of the second connecting rod is hinged with the middle part of the rod body of the first connecting rod; a third connecting rod is hinged to the joint of the first connecting rod and the collecting cover, the other end of the third connecting rod is fixedly connected with the edge of the collecting cover, the third connecting rod is a folding rod hinged to the two ends of the collecting cover, the folding angle is 180 degrees, and the folding direction faces the collecting cover; the connecting part of the first connecting rod and the collecting cover is also movably connected with a first connecting rod, and the zero free end of the first connecting rod is movably connected with the middle part of the rod body of the second connecting rod; a second connecting rod is movably connected between the rod body of the first connecting rod and the middle turning point of the third connecting rod; the sliding block moves upwards along the axial direction of the supporting rod, and the first connecting rod drives the second connecting rod and the third connecting rod to bend, so that the collecting cover is folded and contracted.

Preferably, the first connecting rod and the second connecting rod are rod bodies with certain flexibility.

Preferably, the top center department of respiratory mask is equipped with a transparent arch, the top of bracing piece is equipped with the sign, the upper end of bracing piece stretches into in the transparent arch.

The utility model discloses at least, include following beneficial effect:

1. the length of the oil leakage prevention breather valve device is designed to be 150 mm-250 mm, and part of oil gas is condensed in a condensate layer at the lower part of the breather valve and flows back to the bearing box after being gathered; the oil condensation amount of a breathing method can be effectively increased, meanwhile, the filter layer is arranged in the breather valve, so that air can be discharged into the atmosphere, oil gas is absorbed and intercepted by the filter layer, and the absorbed and intercepted lubricating oil flows back into the bearing box under the action of gravity, so that the discharged air is clean and free of oil, and the effect of preventing the oil gas from leaking outwards with the oil is achieved;

2. the breather cover of the breather valve is arranged into the inner cylinder and the outer cylinder, the outer cylinder covers the exhaust holes, rainwater and dust can be effectively prevented from entering the bearing box, the quality of lubricating oil is ensured, and the service life of the bearing is prolonged;

3. the lower end face of the oil leakage prevention device is tightly sealed by fine machining, and the oil leakage prevention device is in threaded connection with the bearing box and is convenient to disassemble and assemble;

4. the filtering layer is set as a rigid filtering screen, the screen hole is provided with a raised separation blade, the vertical section of the raised separation blade is in a barb shape, the directions of the adjacent raised separation blades are opposite, so that the oil condensing area of the rigid filtering screen is increased, meanwhile, the raised separation blades are arranged above and below the screen holes, condensed oil drops can fall along the separation blades, the oil condensing efficiency is higher, and the oil gas leakage is less;

5. an oil collecting layer is arranged below the filter layer, evaporated lubricating oil vapor passes through the one-way air holes in the collecting cover and is condensed on the filter layer, condensed oil drops fall on the collecting cover to increase the overall weight of the collecting cover, when the overall weight of the collecting cover is too heavy, the limiting piece is compressed, the sliding block rebounds and moves upwards under the action of the compression spring, the oil collecting cover is folded and contracted under the action of the multistage connecting rod, and lubricating oil in the oil collecting cover is extruded to overflow the oil collecting cover and falls back to the bearing box; in the process of collecting the condensed oil by the oil collecting cover, the balanced pressure of the breather valve can be adjusted through the oil collecting layer, the more the collected lubricating oil is, the larger the breather valve is pressed, the effect of temporarily increasing the pressure of the breather valve is played through the self weight of the oil collecting layer after the condensed oil is condensed, the excessive blowout of the pressure in the bearing box is prevented, and the oil condensing efficiency of the breather valve is improved; set up the sign on respiratory mask, through the transparent arch of respiratory mask top, the pressure condition in knowing the breather valve that can be obvious, in time handle.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

Fig. 1 is a schematic structural diagram of an oil leakage prevention breather valve device of a rotary mechanical bearing box according to one embodiment of the present invention;

fig. 2 is a schematic structural diagram of a breather valve device according to one embodiment of the present invention;

fig. 3 is a schematic structural diagram of an oil collecting layer according to one embodiment of the present invention;

fig. 4 is a schematic structural diagram of a rigid filtering screen according to one embodiment of the present invention;

fig. 5 is a schematic diagram of a prior art breather valve device.

Detailed Description

The present invention is further described in detail below with reference to the drawings so that those skilled in the art can implement the invention with reference to the description.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.

As shown in fig. 1-5, the utility model provides an oil leakage prevention breather valve device of a rotary mechanical bearing box, comprising:

the valve tube 2 is 150 mm-250 mm long; the lower part of the outer wall of the valve pipe 2 is provided with external threads 203 which are matched with the threads of a bearing box to be installed; the lower part of the valve pipe 2 is a main oil condensation layer 201; a detachable filter layer 202 which is horizontally arranged is embedded on the inner pipe wall of the valve pipe 2 close to the upper end part of the valve pipe, and the diameter of the filter layer 202 is smaller than the inner diameter of the valve pipe 2, so that the periphery of the filter layer 202 can be abutted against the inner wall of the valve pipe 2; the filter layer 202 can be a filter screen, and the mesh number of the filter screen is 40-160 meshes; the filter screen is made of a stainless steel mesh;

a respiratory mask coaxially covered on the upper end of the valve tube 2; the upper ports of the respiratory mask and the valve pipe 2 can be fixedly connected or connected through threads; the respiratory mask comprises an inner cylinder and an outer cylinder 101, and the inner cylinder and the outer cylinder 101 are coaxially sleeved; the inner diameter of the inner cylinder is 1.8-2 cm larger than the outer diameter of the valve pipe 2; the inner cylinder is coaxial with the valve pipe 2, the lower bottom surface of the inner cylinder is connected with the outer wall of the valve pipe 2, and the inner cylinder and the outer wall of the valve pipe 2 can be in sealing threaded connection or fixed connection; the height of the valve pipe 2 in the inner cylinder is smaller than that of the inner cylinder; the outer wall of the inner cylinder is abutted to the inner wall of the outer cylinder 101, the upper top surface of the outer cylinder 101 is closed, a plurality of exhaust holes 102 penetrate through the side wall of the inner cylinder along the circumferential direction, the exhaust holes 102 are uniformly arranged at intervals, and the length of the outer cylinder 101 is greater than that of the inner cylinder; after oil gas is generated, most of the oil gas is condensed in the oil condensation layer 201 and falls back to the bearing box, and one part of the oil gas is condensed again through the filter layer 202, and meanwhile, the filter layer 202 can also resist part of impurity dust entering from the exhaust hole 102; when the condensing speed of the oil gas in the valve pipe 2 is lower than the generating speed, the oil gas in the valve pipe 2 is accumulated too much, the pressure in the bearing box is increased to a certain degree, the outer cylinder 101 of the respirator is pushed open, the hole in the inner cylinder of the respirator is exposed, the valve pipe 2 is communicated with the atmosphere for pressure relief, and when the pressure in the valve pipe 2 is reduced, the outer cylinder 101 falls down again to seal the exhaust hole 102 in the main inner cylinder and enter the next oil condensing-pressure relief cycle, so that the good working environment of the bearing is ensured, and the service life of the machine is prolonged;

the valve pipe 2 is combined with the size of the connecting thread of the bearing box to be manufactured in a finish machining mode, the material is preferably machined by a nylon rod or stainless steel, and the valve pipe is installed on site.

Compared with a traditional straight-cylinder breather valve of a bearing box (see figure 5), the breather valve has no condensate-pressure relief structure, the exhaust hole 102 is exposed, and no filter structure is arranged, so that metal dust or dust in the machining process easily enters the bearing box, great influence is generated on a rotating shaft machine, the service life of a bearing seat is reduced, oil is easily exposed after oil gas is condensed to form oil leakage, the amount of lubricating oil in the bearing box is gradually reduced, and meanwhile, the environment is polluted to influence on-site civilized production;

in the technical scheme, the specific use process is that the valve tube 2 is connected with a bearing box through threads at the lower part, when a bearing of the bearing box rotates, friction generates heat, part of lubricating oil becomes oil gas to be evaporated outwards, the oil gas is easy to condense at the position of 150-200 mm of the valve tube 2 and falls back to the bearing box, meanwhile, when the oil gas in the valve tube 2 is excessive, the pressure in the bearing box is increased to a certain degree, the outer cylinder 101 of the breathing mask is pushed open to expose a hole on the inner cylinder of the breathing mask, the valve tube 2 is communicated with the atmosphere to release pressure, when the pressure in the valve tube 2 is reduced, the valve tube 101 falls down again to seal an exhaust hole 102 on the main inner cylinder and enters the next oil condensing-pressure releasing cycle, by adopting the technical scheme, the length of the oil leakage prevention breathing valve device is designed to be 150-250 mm, part of the oil gas condenses at an oil layer 201 at the lower part of the breathing valve, after being gathered, the water flows back to the bearing box; the oil condensation amount of a breathing method can be effectively increased, meanwhile, the filter layer 202 is arranged in the breather valve, so that air can be discharged into the atmosphere, oil gas is absorbed and intercepted by the filter layer 202, and the absorbed and intercepted lubricating oil flows back into the bearing box under the action of gravity, so that the discharged air is clean and does not contain oil, and the effect of preventing the oil gas from leaking outwards with the oil is achieved;

the breather cover of the breather valve is arranged into the inner cylinder and the outer cylinder 101, the outer cylinder 101 covers the exhaust hole 102, rainwater and dust can be effectively prevented from entering the bearing box, the quality of lubricating oil is ensured, and the service life of the bearing is prolonged.

In another kind of technical scheme, the concrete structure of filter layer 202 is the tubular structure that does not seal up the top, the bottom surface of filter layer 202 is the rigidity filter screen, and the lateral wall is the corrosion-resistant material of teflon, the lateral wall outer wall of filter layer 202 is equipped with the arch, be equipped with on the inner wall of valve pipe 2 with protruding assorted recess for the rigidity filter screen can block to establish on the inner wall of valve pipe 2, adopts this technical scheme, makes the rigidity filter screen can in time change when blockking up, prevents that the breather valve passageway from blockking up the loss to the bearing box that causes the too big result in of bearing box internal gas pressure.

In another kind of technical scheme, when the mesh number of rigidity filter screen is when 40 ~ 60 meshes, be equipped with half protruding type separation blade of covering on rigidity filter screen's the mesh hole, protruding type separation blade and rigidity filter screen integrated into one piece, the barb form that the cross-section set up for alternately, the orientation of the protruding type separation blade of adjacent mesh hole is opposite, adopt this technical scheme, filter layer 202 sets up to rigidity filter screen, mesh hole department sets up protruding type separation blade, the vertical cross-section of protruding type separation blade is barb form, the orientation of adjacent protruding type separation blade is opposite, make rigidity filter screen's condensate area increase, simultaneously, mesh hole set up protruding type separation blade from top to bottom, can make the oil that condenses drop along the separation blade whereabouts, condensate efficiency is higher, oil gas leakage still less.

In another technical solution, an oil collecting layer is disposed right below the filter layer 202, and the oil collecting layer includes:

a collection cover 305 horizontally arranged below the rigid filter screen, having a flexible layered structure, wherein the extended vertical projection is overlapped with the inner cross section of the valve tube 2, the side wall is abutted against the inner wall of the valve tube 2, and the collection cover 305 may be bowl-shaped or horizontal after being extended; the collecting cover 305 is uniformly provided with one-way air holes at intervals, each one-way air hole on one surface of the collecting cover 305 facing the respirator is provided with a semi-closed baffle, the baffle is oil paper with a diameter slightly larger than that of the one-way air hole, and the partial edge of the grease is bonded with the collecting cover 305, so that when oil gas with overlarge pressure is flushed upwards, the oil paper can be pushed open to enter the upper part of the collecting cover 305, and the oil paper is condensed again at the rigid filtering screen; a fixing hole is formed in the center of the collecting cover 305, a horizontal fixing ring 304 is arranged along the circumferential direction of the fixing hole, and the fixing ring 304 is also made of Teflon;

a support rod 3 which is a hollow rod body; a through limiting hole is formed in the center of the rigid filtering screen, and the support rod 3 passes through the limiting hole, extends to the lower part of the rigid filtering screen and is coaxially and fixedly connected with the fixing ring 304; a stop hole is formed in the wall of the support rod 3, a limiting piece 301 is movably embedded in the stop hole, the limiting piece 301 is connected with the inner wall of the support rod 3 through a compression spring, the limiting piece 301 extends out of the stop hole when the compression spring extends, so that the support rod 3 is clamped on the rigid filter screen through the limiting piece 301 and cannot freely move up and down, and when the compression spring contracts, the limiting piece 301 is located in the support rod 3, and the support rod 3 can move up and down; the limiting piece 301 comprises an arc-shaped first limiting part and a wedge-shaped second limiting part positioned below the first limiting part, and the tip of the second limiting part is positioned below the second limiting part; a stop plate 302 is coaxially sleeved above the stop hole of the support rod 3, and the diameter of the stop plate 302 is larger than that of the limit hole, so that when the stop piece is compressed, the support rod 3 falls down and cannot fall into the bearing box, and the effect of limiting and clamping again is achieved;

a slide assembly, comprising: a sliding block 303 coaxially sleeved with the support rod 3, wherein a clamping groove corresponding to the second limiting part of the limiting sheet 301 is arranged on the sliding block 303; a rebound spring 3046 is coaxially sleeved on the support rod 3 between the sliding block 303 and the fixing ring 304; a plurality of groups of folding mechanisms which are arranged in the circumferential direction are arranged among the sliding block 303, the fixing ring 304 and the collecting cover 305;

the folding mechanism includes: a first connecting rod 3042 is hinged with the sliding block 303, and the other end of the first connecting rod 3042 is hinged with the collection cover 305 at or near the trisection point of the radius close to the center thereof; a second connecting rod 3041 corresponding to the first connecting rod 3042 is disposed on the fixing ring 304, and the other end of the second connecting rod 3041 is hinged to the middle of the first connecting rod 3042; a third connecting rod 3043 is hinged at the joint of the first connecting rod 3042 and the collecting cover 305, the other end of the third connecting rod 3043 is fixedly connected with the edge of the collecting cover 305, the third connecting rod 3043 is a folding rod hinged end to end, the folding angle is 180 degrees, and the folding direction faces the collecting cover 305; a first connecting rod 3044 is movably connected to a joint of the first connecting rod 3042 and the collecting cover 305, and a zero free end of the first connecting rod 3044 is movably connected to the middle of the second connecting rod 3041; a second connecting rod 3045 is movably connected between the rod body of the first connecting rod 3042 and the middle turning point of the third connecting rod 3043; the sliding block 303 moves upward along the axial direction of the supporting rod 3, and the first connecting rod 3042 drives the second connecting rod 3041 and the third connecting rod 3043 to bend, so that the collecting cover 305 is folded and contracted;

the specific use method comprises the steps of firstly installing the oil collecting layer, then clamping the oil collecting layer with the rigid filtering screen, clamping the filtering layer 202 into the valve pipe 2, covering the outer barrel 101, and completing installation; the evaporated lubricating oil vapor passes through the one-way air holes in the collecting cover 305 and is condensed on the filter layer 202, condensed oil drops on the collecting cover 305, the overall weight of the collecting cover 305 is increased, when the overall weight of the collecting cover 305 is too heavy, the limiting sheet 301 is compressed, so that the first limiting part and the second limiting part are simultaneously compressed, the second limiting part cannot be clamped with the sliding block 303, the sliding block 303 rebounds and moves upwards under the action of the rebound spring 3046, the oil collecting cover is folded and contracted under the action of the multi-stage connecting rod, and the lubricating oil in the oil collecting cover is extruded to overflow the oil collecting cover and then falls back to the bearing box;

adopt this technical scheme, collect the oil trap in-process at an oil collecting cover, can adjust the size of the balanced pressure of breather valve through the oil collecting layer, the more lubricating oil of collection, the breather valve pressurized is big more, through the weight of oil collecting layer self behind the oil trap, plays the effect of interim increase breather valve pressure, prevents the excessive blowout of the pressure in the bearing box, also improves the oil trap efficiency of breather valve simultaneously.

In another technical scheme, the second connecting rod 3044 and the second connecting rod are rod bodies with certain flexibility, such as stainless steel wires with a diameter of 0.8-0.12 mm, teflon rods, and the like.

In another kind of technical scheme, the top center department of respiratory mask is equipped with a transparent arch, and this transparent arch is cylindrical cover for the section of thick bamboo, the top of bracing piece 3 is equipped with the sign, the upper end of bracing piece 3 stretches into in the transparent arch for the sign on bracing piece 3 top can present on transparent arch, adopts this technical scheme, makes operating personnel need not open respiratory mask, through observing the position of sign on the transparent arch, can qualitative analysis go out the pressure condition in the respiratory mask, carries out corresponding processing.

In another kind of technical scheme, the top setting of the outer wall external screw thread 203 of valve pipe 2 carries out sealing process through the finish machining, adopts this technical scheme, and the breather valve that makes and the bearing box be connected inseparabler, and sealed effect is better.

The number of apparatuses and the scale of the process described here are intended to simplify the description of the present invention. The application, modification and variation of the oil leakage preventing breather valve device of the present invention for a rotary mechanical bearing housing will be apparent to those skilled in the art.

While the embodiments of the invention have been described above, it is not intended to be limited to the details shown, or described, but rather to cover all modifications, which would come within the scope of the appended claims, and all changes which come within the meaning and range of equivalency of the art are therefore intended to be embraced therein.

Claims

1. Oil leakage prevention breather valve device of a rotary mechanical bearing box, which is characterized by comprising:

2. An oil leakage preventing breather valve apparatus for a rotary mechanical bearing housing, according to claim 1, wherein the screen holes of the rigid filter screen are in the shape of barbs disposed at intervals, and the barbs of adjacent screen holes are in opposite directions.

3. An oil leakage preventing breather valve apparatus for a rotary mechanical bearing housing, according to claim 1, wherein an oil collecting layer is provided right under the filter layer, the oil collecting layer comprising:

4. An oil leakage preventing breather valve apparatus for a rotary machine bearing housing according to claim 3, wherein said first connecting rod and said second connecting rod are rod bodies having a certain flexibility.

5. An oil leakage preventing breather valve apparatus for a rotary mechanical bearing housing, according to claim 3, wherein a transparent protrusion is formed at the center of the upper portion of the breather cover, a mark is formed at the top end of the support rod, and the upper end of the support rod is inserted into the transparent protrusion.