SU1746478A1 - Electric machine - Google Patents

Abstract

Usage: in electrical engineering. SUMMARY OF THE INVENTION: An electric machine comprises a housing 1 on which a ventilation cover 2 is mounted, divided by a transverse wall 3 into two compartments 4 and 5. In the lower part of the ventilation cover of the first compartment 4 there are louvers 6 for cooling air inlet, a longitudinal partition 7 and two removable filters 8. The removable filters are installed behind the partition 7 in a vertical plane along the entire height of the ventilation casing at an angle a to each other and to the longitudinal axis of the casing with the possibility of their removal from the openings 11, complements a beveled faces of the casing. The horizontal part of the partition 7 has a curved down

Description

The invention relates to electrical engineering, in particular to electric machines that are protected from atmospheric exposure with an axial-radial ventilation system, which provide protective measures against increased concentration of dust, as well as rain and snow splashes in the atmosphere or precipitation. .

An electric machine protected from weathering with an axial-radial ventilation system is known, comprising a housing on which a ventilation casing mounted as a parallelepiped is mounted, divided by transverse and longitudinal partitions into two ventilation bays, between which detachable filters are placed, the latter are installed across the ventilation casing at an angle to each other and its transverse axis with the possibility of their extraction from holes made in the side walls of the casing so that od cooling air containing dust, snow and rain splashes, flow directly through the filters installed below the vent housing.

Also known is an electric machine protected from weathering with an axial-radial ventilation system, comprising a casing on which a ventilation casing mounted like a parallelepiped is mounted, divided by a transverse wall into two compartments, one of which has louvres for cooling air inlet and removable filters, and in the other, located in the zone of the internal centrifugal fan, there are louvers for the cooling air outlet, while the filters are also installed across the ventilation casing under the coal om to each other and its transverse axis with the possibility of being extracted from holes made in the side walls of the ventilation casing, and the louvers for the entry and exit of cooling air are made along the ends of the ventilation casing. To turn the cooling air jets through 180 ° towards the filters, a partition is made, under which these filters are placed. It has significant advantages over the analogue in terms of assigning filters to the zone of the active parts of the electric machine due to the displacement of filters into the ventilation casing and thereby protecting them from direct exposure to dust, snow and rain splashing at the cooling air inlet to the active parts of the electric machine, such a design leads to a significant increase in mass-dimensional indicators and some complication of the design, and the placement of removable filters in the ventilation casing on the side across its entire width, as in the anal n, And the prototype, complicates their maintenance in portsesse operation of the electrical machine.

The purpose of the invention is to reduce the weight and size parameters by reducing the height of the ventilation hood and simplifying its design.

This is achieved by the fact that in an electric machine protected from atmospheric exposure with an axial-radial ventilation system, comprising a casing on which a ventilation casing configured as a parallelepiped is mounted, divided by a transverse wall into two compartments, in one of which there are louvers for entry cooling air

a longitudinal partition and removable filters, and in another, located in the zone of an internal centrifugal fan, louvers for cooling air exit, these filters are installed in a vertical plane along the entire height of the ventilation hood at an angle to each other and to the longitudinal axis with the possibility of their extraction from holes made in the beveled edges of the casing on the side opposite to the fan.

FIG. 1 shows an electric machine, weatherproof axonometric projection; in fig. 2 - the same, longitudinal section; FIG. 3 is a section A-A in FIG. 2; in fig. 4 is a section BB in FIG. 3. Two types of arrows show the cleaning scheme of the cooling air jets and their movement through the active parts of the weatherproof electric machine.

An electric machine protected from weathering, for example, synchronous, with an axial-radial ventilation system (Figs. 1 and 2) includes a housing 1 on which a ventilation hood 2, shaped like a parallelepiped, is mounted on two compartments 4 and 5. In the lower part of the ventilation casing 2 of the first compartment 4, louvers b are provided, designed for the entrance of cooling air, a longitudinal partition 7 deflecting by 180 ° air, and two detachable filters 8. In the second compartment 5, located in the area inside - R The centrifugal fan 9 is made of louvers 10. designed to exit the air passing through the axial ventilation channels of the rotor and the radial channels of the rotor and stator to the environment. Removable filters 8 are installed behind the partition 7 in a vertical plane over the entire height of the ventilation casing 2 at an angle a to each other (Fig. 1 and 3) and to the longitudinal axis of the ventilation casing 2 with the possibility of their being removed from the holes 11 made in beveled at an angle ft gran x 12 casing. The horizontal part of the partition 7 has downward curved edges 13 (Figs. 1, 3 and 4) which, with the vertical part 14, form partitions 7 and the side walls of the ventilation casing 2, cavities 15 and 16 located on both sides of the longitudinal axis of the ventilation casing 2 and are meant to accumulate the largest fraction of dust and moisture. Behind the vertical part 14 of the partition 7, before the filters 8, there are two additional dust-collecting cavities 17 (Fig. 3) intended to receive dust settled directly in front of the filters, formed by the vertical part of the partition 7, triangular bottoms 18 and the filters 8 itself. Ventilation duct 19 made downstream of the filters, serves to clean the dust and cooling air from the active parts of the electric machine

Such a design of the ventilation casing of an electric machine allows it to be used both in the performance according to the degree of protection IPW24 (from dust, snow and rain splashes), and in the performance according to the degree of protection IP24 (from snow and rain splashes). In the latter version, removable filters 8 may not be installed, and removable plugs must be installed on the holes 11 made in the beveled edges of the ventilation casing 2.

To monitor the degree of dustiness of the filters 8 of the ventilation hood 2, resistance thermometers mounted on the stator or thermal sensors, such as gauge type, can be used to monitor the temperature of the cooling air exiting the centrifugal fan installed in the compartment 5 of the ventilation hood 2.

Vertical installation of filters 8 over the entire height of the ventilation casing at an angle a to each other and to its longitudinal axis through holes 11, made in the bevelled edges of the casing, allows to reduce the weight and size parameters by reducing the height of the ventilation casing, and reducing the length filters 8 and distance 1 (fig. 3) from the electric machine to the nearest wall or mechanism during removal and installation of filters 8, simplify the design of the ventilation casing 2 and the maintenance of filters 8 during operation.

Forum and electric machine, protected from weathering, with an axial-radial ventilation system, comprising a case on which a ventilation casing configured as a parallelepiped is mounted, divided by a transverse wall two compartments, in one of which there are louvers for the entrance of cooling air, a longitudinal partition and removable filters, and in the other - placed in the fan zone, louvers for the exit of cooling air, which in order to reduce the weight and size oil, and simplify the structure, said filters are installed in a vertical plane along the entire height of the housing at an angle to each other and to the longitudinal axis vozmrzhnostyu their removal from the holes formed in the chamfered faces of the casing from the side opposite the blower

J. I 4 7 2 6 tf 8fZ

   I / / / /

A-A

111

13

6-6

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FIG. four

Claims (1)

Claim An weatherproof electric machine with an axial-radial ventilation system, comprising a housing on which a ventilation casing made in the form of a parallelepiped is mounted, divided by a transverse wall into two compartments, in one of which blinds for cooling air inlet, a longitudinal partition and removable filters, and in another one located in the fan zone, louvers for the exit of cooling air, which is characterized in that, in order to reduce the overall dimensions and simplify the design , these filters are installed in a vertical plane along the entire height of the casing at an angle to each other and to the longitudinal axis with the possibility of their extraction from the holes made in the beveled faces of the casing from the side opposite to the fan. 6-6 Fie 4