UA144987U - MAIN VENTILATION FAN INSTALLATION - Google Patents

Abstract

The main ventilation fan unit comprises a drive (4), sleeve seals (24) of the impeller shaft (5) (13) of bearing bearings (6 and 7), between which two inlet boxes are connected to the suction channels (25). 1 and 3), which are tightly connected between the housing (2) of the impeller (13) by nozzles (1a and 3a), the channels of which are air-connected through the impeller (13) with the cavity of its housing (2), which is connected to the blow channel (23), the oil tank (10), connected by discharge pipes (9), as well as drain pipes (8) with the cavities of the bearing supports (6 and 7). At least one of the bearing supports (6 and 7) is provided with a breather (11) installed with the possibility of connecting its air part of the cavity with the external environment. The cavity of the inlet box (1) or the channel of the pipe (1a) is connected to the air part of the cavity of the oil tank (10) additionally introduced by the first depressive pipe (21), which contains located first from the oil tank (10) the first vacuum gauge (19) and the first adjustable throttle (15). The air part of the cavity of at least one of the bearing supports (7) is connected to the external environment through the channel of the additionally inserted second depressive pipe (22), which contains in front of the mounted breather (11) sequentially placed from the bearing support (7) ) and the second adjustable throttle (14).

Description

A useful model is related to mining engineering, namely the main ventilation fan units, and can be used to adjust the pressure of the air-oil mixture in the oil tank and the bearing support housing.

As the closest analogue, the fan installation of the main ventilation VRCTS-45СсМ IRUKOVODSTVO po ZKSPLUATATSIYA 43305.6300-04ROZ, PJSC "DTZK" was selected

PAVLOGRADUGOL", PSP "SHAKHTOUPRAVLENIEYE DNEPROVSKOE", 2017 g), which contains: a drive; a casing with a blow-off channel; an impeller mounted on a shaft inside the casing; bearing supports with cuff seals of the shaft; two air boxes, the cavities of which are connected to the suction channels and the channels of the nozzles, which are connected to the casing and lead to the impeller located in it; the oil tank, the cavity of which is connected by the channels of the drain and injection pipelines to the cavities of the bearing supports, each of which has a breather on the outside, to relieve excess pressure in it due to a gradual increase in the temperature of the air-oil mixture, by approximately 30 "C relative to the environment.

The disadvantage of the closest analogue, related to the relief of pressure in each bearing support, is that when the sleeve seals of the shaft in the bearing assembly wear or lose elasticity, there is a possibility of the lubricant escaping through these sleeve seals to the outside under the pressure of the oil-air mixture heated inside the bearing assembly. This is due to the fact that through the breathers, the pressure relief in the bearing supports is insufficient to ensure the release of the pressure of the air-oil mixture to the level at which the load on the shaft seal cuffs will decrease and the leakage of lubricant through them will be eliminated.

The useful model is based on the task of providing an opportunity to further reduce the pressure of the air-oil mixture on the seals in the bearing supports, due to pressure regulation in the oil tank, under the action of the depression created by the air flow in the cavity of one of the air boxes or the channel of one of the nozzles, while maintaining the pressure balance in the cavity of each bearing support.

Technical result: reducing the load on the sealing of the bearing supports, created by the pressure of the heated oil-air mixture, allows you to exclude oil leakage through the cuff seals and preserve their lubrication, due to the possibility of additionally adjusting the reset and balance of the pressure of the heated oil-air mixture in the bearing supports and the oil

From the tank, depending on the increase in the carrying capacity of the cuff seal due to its wear or loss of elasticity in each bearing support.

Achieving the technical result will provide consumer properties: reduction of oil consumption for lubrication of bearing assemblies and reduction of pollution of the external environment in the maintenance area of the ventilation installation, as well as increase of the operational period of each bearing assembly between its service maintenance periods.

The declared technical result is achieved due to the fact that in the fan unit of the main ventilation, which contains the drive, the bearing supports are equipped with cuff seals of the impeller shaft, between which are placed and connected to the suction channels two input boxes, which are hermetically connected with the placed between them by the casing of the impeller by nozzles, the channels of which are air-connected through the impeller with the cavity of its casing, which is also connected to the exhaust channel, the oil tank connected by the discharge and drain pipelines to the cavities of the bearing supports, while at least one of the bearing the support is equipped with a breather installed with the possibility of communicating its air part of the cavity with the external environment, according to a useful model, it is proposed to connect the input box cavity or the nozzle channel with the air part of the oil tank cavity with an additionally introduced first depression pipeline, which contains located in series from oil tank first a vacuum gauge and the first adjustable throttle, and the air part of the cavity of at least one of the bearing supports is connected to the outside environment through the channel of the additionally introduced second depression pipeline, which contains a second vacuum gauge and a second adjustable throttle located in series from the bearing support in front of the breather installed on it.

The features listed above, different from the closest analogue, are necessary and sufficient in all cases covered by the scope of legal protection of a utility model.

In addition, it is suggested: - connect the first vacuum gauge through the first shut-off valve to the first depression pipeline, and connect the second vacuum gauge through the second shut-off valve to the second depression pipeline; - install a filter at the end of the first depression pipeline, which is located in the cavity of the air box or the channel of the inlet pipe.

A useful model is explained by an example, the implementation of which is not the only possible one, but clearly demonstrates the possibility of achieving a technical result with the proposed new set of essential features.

The essence of the useful model is explained by the drawing, which shows the air-hydraulic scheme of the ventilation unit.

Brief description of the drawings: 1 - input box; 1a - nozzle; 2 - casing;

C - inbox;

For - nozzle; 4 - drive; 5 - shaft; 6 - bearing support; 7 - bearing support; 8 - drain pipeline; 9 - injection pipeline; 10 - oil tank; 11 - breather; 12 - plug; 13 - working wheel; 14 - the second adjustable throttle; 15 - the first adjustable throttle; 16 - the second shut-off valve; 17 - the first shut-off valve; 18 - the second vacuum gauge; 19 - the first vacuum gauge; 20 - filter; 21 - the first depression pipeline;

From 22 - the second depression pipeline; 23 - exhalation channel; 24 - cuff seal; 25 - suction channel.

The new technical solution is presented on the example of the ventilation unit of the main ventilation, which contains: drive (4); casing (2) with a blow channel (23); the working wheel (13) installed on the shaft (5) inside the casing (2); bearing supports (b and 7) with cuff seals (24) of the shaft (5); air intake boxes (1 and 3), the cavities of which are connected to the suction channels (25), as well as to the channels of the nozzles (Ta and Za), which are connected to the casing (2) and are led to the impeller (13); oil tank (10), connected by discharge pipelines (9) and drain pipelines (8) with cavities of bearing supports (6 and 7); the first depression pipeline (21), the channel of which through the filter (20) connects the air cavity of the oil tank (10) with the cavity of the input box (1); the second depressed pipeline (2), the channel of which through the breather (11) connects the air part of the cavity of the bearing support (7) with the external environment.

The first depression pipeline (21) contains a vacuum gauge (19) connected through the first shut-off valve (17), the first adjustable throttle (15) and a filter (20), which is placed in the cavity of the inlet box (1). The bearing support (b) is equipped with a plug (12), for the possibility of installing a breather or another identical second depression pipeline (2), an additional pipeline with a breather (not shown in the drawing).

The second depression pipeline (22) contains a second adjustable throttle (14) installed on it in front of the breather (11) and a second vacuum gauge (18) connected through the second shut-off valve (16).

In the operating mode, with the drive (4) turned on, the air flow passes through the suction channels (25), enters the cavities of the air boxes (1 and 3) and enters through the channels of the nozzles (Ta and Za) into the cavity installed on the shaft (5) of the impeller (13), from where it is pushed outward by the blades into the casing cavity (2) and the exhaust channel (23).

Lubricant supply to the bearing supports (6 and 7) is carried out through the discharge pipe (9) from the moment the ventilation unit is switched on and is carried out continuously until it is turned off.

In the absence of oil leaks through the cuff seals (24), the first adjustable throttle (15) is closed, and the second adjustable throttle (14) is open. The second depression pipeline (22) with a breather (11), the second adjustable throttle (14) and the second vacuum gauge (18) is sufficient to use only for one of the bearing supports (7), because between the cavity of the oil tank (10) and the cavities of the bearing supports ( b and 7) drain pipelines (8) are provided with air communication, which allows to ensure pressure balance in the cavities of the bearing supports (6 and 7).

If oil leaks are detected through the cuff seals (24), the first adjustable throttle (15) is opened and the second adjustable throttle (14) is closed, and the first (17) and second (16) shut-off valves are opened to remove the readings of the first (19) and second (18) vacuum gauges. Under the action of the depression created by the air flow in the cavities of the input boxes (1 and 3), a discharge zone is created in the air part of the cavity of the oil tank (10) through the first depression pipeline (21), and the pressure in the bearing cavities is relieved through the channels of the drain pipelines (8) nodes (6 and 7), as a result of which the load is quickly removed from the cuff seals (24) and oil leakage through them stops.

To eliminate excessive depression in the oil tank (10), in order to reduce the outflow of lubricant from the cuff seals (24) into the cavity of each of the bearing supports (6 and 7), the intensity of the air flow is adjusted by the first adjustable throttle (15) taking into account the readings of the first vacuum gauge (19).

In order to achieve an optimal balance of discharge in the cavities of both bearing supports (6 and 7), the opening and adjustment of the suction of the air flow from the external environment through the breather (11) is carried out by the second adjustable throttle (14). By adjusting the intensity of the air flow through the breather (11), the discharge in the cavities of the bearing supports (6 and 7) is reduced to the optimal value of the reading of the vacuum gauge (18) in the range of 1300-2800 Pa, as a result of which the displacement of air lubrication from the cuff seals (24) is completely excluded ), which can be absorbed from the external environment into the cavity of each of the bearing supports (6 and 7).

The use of the filter (20) is necessary to exclude contamination with oil particles

From the cavity of the inlet box (1) and the nozzle channel (Ta) in the operating mode of the fan, as well as to exclude the clogging of the first depression pipeline (21), during maintenance of the installation in the non-operating mode of the fan installation.

The use of the first (17) and second (16) shut-off valves ensures the exclusion of flow leakage in case of damage to the first (19) and second (18) vacuum gauges.

Source of information: 1. OPERATION MANUAL 43305.6300-04RZ, PJSC "DTZK PAVLOGRADUGOL",

PSP "SHAKHTOUPRAVLENIE DNIPROVSKOE", 2017, p. 9, p. 58-62, p. 72-75.

Claims (3)

USEFUL MODEL FORMULA 1. Fan installation of the main ventilation, which contains the drive (4), cuff seals (24), shaft (5), impeller (13), bearing supports (6 and 7), between which are located, connected to the suction channels (25), two input boxes (1 and 3), which are hermetically connected to the housing (2) of the working wheel (13) placed between them, by nozzles (Ta and Za), the channels of which are air-connected through the working wheel (13) with the cavity of its housing (2), which is connected to the blow-off channel (23), the oil tank (10), which is connected by injection pipelines (9), as well as drain pipelines (8) with the cavities of the bearing supports (b and 7), while at least one of the bearing supports (b and 7) is equipped with a breather (11), installed with the possibility of communication of its air part of the cavity with the external environment, which differs in that the cavity of the input box (1) or the channel of the nozzle (Ta) is connected with the air part of the oil tank cavity (10) additionally introduced by the first depression pipeline (21), which m the first vacuum gauge (19) and the first adjustable throttle (15) are located in series from the oil tank (10), and the air part of the cavity of at least one of the bearing supports (7) is connected to the external environment through the channel of the additionally introduced second depression pipeline (22) , which contains a second vacuum gauge (18) and a second adjustable throttle (14) located in series from the bearing support (7) in front of the breather (11) installed on it. 2. Fan installation of the main ventilation according to claim 1, which is characterized by the fact that the first vacuum gauge (19) is connected through the first shut-off valve (17) to the first depression pipeline (21), and the second vacuum gauge (18) is connected through the second shut-off valve (16) to the second depression pipeline (22). 3. Fan installation of the main ventilation according to claim 1, which differs in that a filter (20) is installed at the end of the first depression pipeline (21), which is placed in the cavity of the air box (b) or the channel of the inlet pipe (Za). This is Ya ay A TO oo ve cha tsu A and sh «i g t. dya i tia Shi: che E che V nn poviny, x BB to eat t ; и н: not 28 OYAe- | ZO SOYA Oko | with I ana DI