Fan unit

FIELD: ventilation.

SUBSTANCE: invention relates to fan engineering and can be used as a component of space technology temperature control systems. The technical result is achieved by a fan unit comprising a casing including a cylindrical boring and two flanges with axial holes, two bushes are coaxial to the casing and connected to it by piers; an electric motor is set in each bush and its shaft is equipped by an impeller set inside the cylindrical boring. The casing consists of two parts; the first flange is fitted at the end face of the first casing part and the second one - of the second casing part. A bush with piers is placed in each casing part; the first flange is fitted with threaded holes; the flanges are contacting with each other and interconnected by screws screwed into the threaded holes and passing through the axial holes of the second flange with the screw heads being placed on the second flange side; the outer surface of the first casing part is cylindrical along the section from its free end face to the first flange and the first flange axial holes are projecting beyond the second flange outline.

EFFECT: ensuring repairability and increasing variety of the fan unit assembly patterns.

1 dwg

 

The invention relates to ventilyatorostroeniya and can be used as part of systems management products aviation and rocket technology.

Famous fan Assembly, comprising a housing with pylons and installed in three axial fan, the fairings are placed inside the pylons [1]. A disadvantage of this device is a significant design complexity, due to the necessity of milling pylons inside cylindrical surface of the shell.

This lack deprived chosen as the prototype of the fan, comprising a housing, coaxially mounted in its sleeve in the form of rings with protruding to the outside of the pylons, two brackets, each of which is placed a motor mounted on its shaft impeller [2]. Pylons connected to the housing by fasteners. On each of the two ends of the body has a flange with axial holes serving for mounting the fan on the unit.

The disadvantage of this fan is neremontolrigoden in the case of its application on Board of the spacecraft - spacecraft or space station. In case of failure of one of the fans of the fan is possible to replace only the fan Assembly as a whole, because the astronauts are not able to perform once the Orc unit and replacement of the motor, as it is connected with necessity of wesoloski pins and perform soldering of the wires of the motor to the connector on the outside of the housing of the fan Assembly. Therefore, in case of failure of one fan unit during launch of the spacecraft or orbital flight need to be transported from Earth to replace on Board the entire fan Assembly, which increases the traffic on the space station and is associated with high material costs. Another disadvantage of the prototype are narrow layout possibilities, manifesting when used in other units (usually in the spacecraft fan units are mainly used in refrigeration and drying units, placed in the descent module and the living compartment manned spacecraft). The arrangement of mounting flanges on the ends of the housing causes, as a rule, the sequential arrangement of the fan and the unit in which it is used, which causes a large axial dimension of the Assembly, and this is unacceptable on the basis of very limited volumes of the compartments of the spacecraft. The possible embedding of the flange of the fan inside the unit dramatically reduces the maintainability of this design, as for removal of the fan in case of refusal, the astronaut has to work with loboko recessed cavity Assembly screws that may be in conditions of space flight difficult or impossible operation, and in any case leads to an increase in the transverse dimensions of the unit.

The technical result achieved by using the claimed invention is the provision of maintainability and expansion of the layout capabilities of the fan Assembly.

This result is achieved due to the fact that in a fan Assembly, comprising a housing with a cylindrical bore and two flanges with axial holes connected to the housing by two pylons coaxially him bushings installed in each of the motor is fixed on its shaft impeller placed inside a cylindrical bore according to the invention, the casing consisting of two parts, the first flange is made at the end of the first part of the housing and the second end of the second housing parts, in each part of the body is placed a sleeve with pylons, in the first flange threaded holes, the flanges are in contact with each with each other and connected by means of screws screwed into the screw holes and passing through the axial holes of the second flange, with the heads of the screws placed from the side of the second flange, the outer surface of the first part of the building on the site from its free end to the first flange performed the cylinder is practical, and the axial holes of the first flange is made protruding beyond the contour of the second flange. As stated set of essential features allows you to retrieve the specified technical result, the claimed solution meets the criterion of "inventive step".

The illustration shows a specific example of the block fans, longitudinal section.

The fan Assembly includes a housing 1 with a cylindrical bore 2 and the two flanges 3 and 4 with axle holes 5 and 6, respectively. With the housing 1 are connected by piers 7 and 8 two coaxially his sleeve 9 and 10, respectively. In each of the sleeves 9 and 10 is installed motors 11 and 12 respectively mounted on their shafts impellers 13 and 14, respectively, are placed within the cylindrical bore 2. The housing 1 is made of two parts, the first flange 3 is made at the end of the first part 15 of the housing 1 and the second flange 4 at the end of the second part 16 of the housing 1. In each of the parts 15 and 16 of the housing 1 is placed the sleeve 9 and 10, respectively, with piers 7 and 8, respectively. In the first flange 3 threaded holes 17, the flanges 3 and 4 are in contact with each other and connected by means of screw 18 screwed into the screw holes 17 and passing through the axial hole 6 of the second flange 4, while the head 19 of the screw 18 posted by side W the cerned flange 4. The outer surface 20 of the first part 15 of the housing 1 in the area from its free end 21 to the first flange 3 is cylindrical. Axial hole 5 of the first flange 3 is made protruding beyond the contour of the second flange 4. The dash-dotted line 22 is conventionally shown the contours of the unit, which includes the fan. Also the dash-dotted line shows the screws 23 that secures the fan Assembly to the unit. From the electric motors 11 and 12 are laid out the fan Assembly the cables 24 and 25, respectively.

The fan operates as follows: when one of the motors (e.g., an electric motor 11) it rotates the impeller 13, the blades of which create air flow. When switching on the electric motor 12 and he rotates the impeller 14, the blades of which create air flow. Both electric motors 11 and 12 can be operated simultaneously, increasing the pressure and the flow rate of the fan for extreme conditions. In case of refusal on Board of the spacecraft motor 12, there is no need to bring on Board all the fan enough to be transported from Earth only the bottom (illustration) fan and replace it with this replacement of the fan is performed without removing the entire unit fan unit 22: you need to Unscrew the screws 18, to remove n the life of the failed fan and replace it delivered then re-install the screws 18. In case of failure of the electric motor 11 repair of the fan is a bit more difficult, but also quite capable crew: you must Unscrew the screws 23, it is possible, because the axial hole 5 of the first flange 3 is made protruding beyond the contour of the second flange 4. Then remove the fan from the unit 22, Unscrew the screws 18, to replace a failed top (illustration) fan delivered from the Ground, then connect the two fan screws 18, to insert the fan in the unit 22 and set screws 23. The possibility of removing the fan Assembly is ensured by the fact that the outer surface 20 of the first part 15 of the housing 1 in the area from its free end 21 to the first flange 3 is cylindrical, and also due to the fact that the cable 24 is placed between the flanges 3 and 4, so perhaps removing the fan Assembly from the unit 22 through the axial movement of the fan Assembly. As a result of use of the invention is provided maintainability and enhanced compositional features of the block fans, as its design allows to reduce the overall axial size of the Assembly, which includes the fan, while maintaining free access to the screws that secure the fan on the unit, and screws connecting part of the housing Blokhintsev. These advantages allow the fan to be used in rocket and space technology.

Literature

1. The patent of Russian Federation №1670185 on CL F04D 19/02, 1991

2. The patent of Russian Federation №2009376 on CL F04D 25/08, 1994 (prototype).

A fan Assembly, comprising a housing with a cylindrical bore and two flanges with axial holes connected to the housing by two pylons coaxially him bushings installed in each motor attached to the shaft impeller placed inside a cylindrical bore, characterized in that the casing consists of two parts, the first flange is made at the end of the first part of the housing and the second end of the second housing parts, in each part of the body is placed a sleeve with pylons, in the first flange threaded holes, the flanges are in contact with each other and connected by means of screws screwed in the screw holes and passing through the axial holes of the second flange, with the heads of the screws placed from the side of the second flange, the outer surface of the first part of the building on the site from its free end to the first flange is cylindrical and axial holes of the first flange is made protruding beyond the contour of the second flange.



 

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