Breather

FIELD: mechanical engineering; removal of excessive pressure from reservoirs of reduction gears, gear-boxes and other mechanisms.

SUBSTANCE: proposed breather has stepped housing 1 with air escape hole, cap 6 and hemispherical dampening element 5. Rod 2 is fitted in air escape hole. Upper part of rod 2 is provided with circular groove. Lower part of rod 2 which is taper in shape extends beyond housing. Dampening element 5 is received by circular groove of rod 2. Cap 6 mounted immovably on housing 1 is provided with slots 7 in its lower part. Clearance is formed in between bottom of cap 6 and end face of rod 2. As soon as pressure reaches its excessive level, rod moves upward letting the air outside through clearance formed between dampening element 5 and through hole of housing 1, flat and slots 7.

EFFECT: enhanced operational reliability; avoidance of water penetration inside mechanism at immersion of breather in aqua medium.

4 dwg

 

The invention relates to mechanical engineering and can be used to eliminate excessive pressure in the tank corps gear reducers, gear boxes and other mechanisms.

Known valve etching of air, comprising a housing, a stop valve in the float and seat, made in the form of an adjusting screw, a compensator for damping hammer, made in the form of a package of parallel metal plates not less than two and located in the lower part of the chassis (see certificate No. 16393, IPC 7 F 16 K 17/19).

The closest known to the proposed technical solution is the breather that contains a two-stage tubular housing with thrust collar placed on the upper end of the body, the upper part of which is overlapped freely covering body movable cap with stop lifting in the form of antennae located with the possibility of contact with the thrust collar, the damping element mounted between the movable hood and the thrust collar (see RF patent №2088832, IPC 6 F 16 To 15/02).

The disadvantage of this technical solution, as analogue is not a high reliability in operation, and does not exclude the possibility that water or other liquid inside the cavity of the mechanism when immersed breather in the aquatic environment.

Technical problem before the its technical solution is to increase the reliability in the operation and Troubleshooting of the water flow inside the cavity of the mechanism when immersed breather in the aquatic environment.

This technical result is achieved by the fact that the breather containing a stepped hull with a hole for the air outlet, the upper part of which is closed by a cap, the damping element in the hole to release air installed with the formation of the annular gap, the rod having the opportunity reciprocating movement of the upper part of the rod is made with an annular groove, and the lower part is the casing made cone-shaped, with the damping element has a hemispherical shape and placed in the annular groove of the rod, in addition, a cap is installed on the housing stationary with the formation of the gap between the bottom cap and the end face of the rod and the cap in the lower part has at least two evenly spaced around the circumference of the slot and supported on the stage casing of larger diameter, and the step of smaller diameter in contact with the inner surface of the cap, made with flats.

To eliminate the possibility of water ingress into the cavity of the mechanism is as follows:

- set in the design of the breather interacting spring and the movable element, which tightly closes the bore hole cavity mechanism, and opens it with a considerable increase in pressure inside the mechanism. However, in this case the spring should be installed prior is loaded sustained fashion, and this creates in the cavity of the mechanism with significant air pressure, which leads to a sharp expulsion of the lubricant, which is in the cavity of the engine "oil mist", and as a consequence obmakivanie outside of the cap and the surface of the mechanism. As a result of impaired performance breather (the accumulation of dust and dirt on almoslino surface breather and closing the through-holes for air), which may lead to fire, corrosion and others;

- connect the cavity of the mechanism with the atmosphere by means of a device having an outlet opening located above the water surface, but it will significantly increase the cost of the product due to the presence of a large number of fasteners and anchor detail, complexity of installation, increased size, and the availability of special mechanisms drying system from the condensate formed in the device;

to set the element, which is in the process of rapid movement of air from the cavity of the mechanism to the output will separate the lubricant from the air, but it will lead to a complex design concepts, which will significantly increase the cost of a breather.

There are the following technical contradiction:

on the one hand, it is necessary to have an open hole to the pressure drop did not cause a sharp throwing "the weight is anago fog";

on the other hand, it is necessary to have a closed hole, so that the mechanism is not exposed to water immersion breather in the aquatic environment.

In the proposed technical solution, the elimination of water inflow into the cavity of the mechanism when immersed breather in the aquatic environment is achieved by the fact that the penetration hole of the housing is closed by a movable element and is located in the closed volume of air formed by the inner cavity of the cap, which helped to resolve the conflict.

A distinctive feature of the proposed technical solution, consisting in the installation hole to release the air with the formation of the annular gap of a rod having a reciprocating movement and the execution of the upper part of the rod with the annular groove in which is placed the damping element is hemispherical in shape, helps to ensure a complete seal cavity mechanism in aquatic environment, the presence of the annular gap provides the reciprocating movement of the rod and the free passage of air from the cavity of the mechanism when the excessive pressure.

A distinctive feature consists in the fact that the lower part of the rod is made of a conical shape and is for the body, helps to ensure the return into the cavity of the mechanism drops of lubricant inside the housing breather and with Ergen.

The presence of still installed on the body of the cap prevents the ingress of dirt, water and the like into the cavity of the mechanism, and a gap formed between the bottom cap and the end face of the rod, permits operation of a breather.

The presence in the lower part of the hood of the slots, and the implementation of smaller scale buildings with flats allow the exit of air from the hood.

Based on the above we can conclude that the proposed solution meets the patentability requirements of "novelty" and "inventive step".

Figure 1 shows the breather in section; figure 2 is a breather in section, placed in the aquatic environment; figure 3 - cross section a-a in figure 1; figure 4 - cross section B-B in figure 1.

The breather includes a stepped housing 1 with a hole for the air outlet (bore hole), which features a core 2. Terminal 2 has the possibility of reciprocation due to the fact that between the wall of the housing 1 and terminal 2 there is a gap 3, provides for the free passage of air from the cavity 4 of the mechanism when the excessive pressure. The upper part of the rod 2 is made with an annular groove in which is placed the damping element 5. The damping element 5 is made hemispherical shape of the elastic sealing material that provides a tight fit to the hole to release the air. The lower part of the article is Rina 2 stands for the size of the body 1 and is made conical.

The upper part of the housing 1 is closed by a cap 6. The cap 6 at the bottom part has at least two evenly spaced around the circumference of the slot 7 and is fixed to the stationary housing 1 by pushing in several places (at least three) of the lower part of a cap in an annular groove formed by the steps of the housing 1. The cap 6 is installed on the housing 1 with the formation of the gap between the bottom cap and the end face of the rod 2, the minimum value of this gap should be such that vertical movement of the rod 2 excess air from the cavity 4 is freely passed through the penetration hole in the housing 1 and the maximum value of the gap should be such that when heavy vibration is not violated design breather.

The cap 6 is based on level 8 of the housing 1, which has a larger diameter and transverse cross-sectional hexagonal shape for wrapping a wrench. The smaller the step 9 of the housing 1 is placed inside the cap 5, as his guide, and with a 10 inch, providing an air outlet from the cap 6 into the atmosphere. In the lower part of the valve body 1 is threaded to svorachivaniya in the crankcase vented mechanism.

The breather works as follows.

During operation of the mechanism occurs the increased air pressure in the cavity 4, which creates the force of pressure acting on the wall to the pus 1 and the damping element 5. When reaching into the cavity 4 overpressure terminal 2 rises, opening penetration hole in the housing 1. Air through the formed gap between the damping element 5 and the orifice of the housing 1, the 10 inch and the slots 7 comes out.

After equalization of the pressure inside the cavity 4 of the mechanism, the rod 2 is lowered under the action of its weight, blocking the penetration hole in the body 1, preventing the ingress of small dust particles inside the cavity 4.

Also in the process of operation of the mechanism, when vibrations occur, the rod 2 with the damping element 5 starts to make reciprocating movement, constantly venting excess air from the cavity 4.

When immersed breather in the water last through the slots 7 seeks to fill the inner cavity of the cap 6, squeezing the air out of the internal cavity of the cap 6 into the cavity of the mechanism. Since the penetration hole of the housing 1 is closed damping element 5, the inside cavity of the cap 6 is formed a closed volume of air (air cushion), which prevents further flow of the water environment in the cavity of the cap 6 and the cavity 4 of the mechanism.

The proposed solution provides the reliability breather during operation and eliminates the flow of water inside the cavity of the mechanism when immersed breather in the aquatic environment.

The proposed technical solution to meet the requirement of industrial applicability and possible to implement on standard manufacturing equipment.

The breather containing a stepped hull with a hole for the air outlet, the upper part of which is closed by a cap, a damping element, characterized in that the outlet air is installed with the formation of the annular gap, the rod having the opportunity reciprocating movement of the upper part of the rod is made with an annular groove, the bottom part is the casing made cone-shaped, with the damping element has a hemispherical shape and placed in the annular groove of the rod, in addition, a cap is installed on the housing stationary with the formation of the gap between the bottom cap and the end face of the rod, and a cap at the bottom is on least two evenly spaced around the circumference of the slot and supported on the stage casing of larger diameter, and the step of smaller diameter in contact with the inner surface of the cap, made with flats.



 

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