SU1662627A1 - Inertia-type filter - Google Patents

Abstract

The invention relates to air cleaners primarily for passenger car ventilation systems, air cooling systems for traction motors of rolling stock, and allows achieving a high degree of air purification from dust at low hydraulic losses. The inertial filter contains intake grille 1, inlet and outlet channels 2, 7 of confused-diffuser type, arranged at an angle to each other with an opening in the places of their conjugation in the lower part, as well as filter grille 3 with plates 8 of a triangular profile with a large hydraulic resistance in the opposite direction downstream than in the forward direction and installed in the opening between the channels. 2 Il.

Description

The invention relates to air cleaners mainly for passenger car ventilation systems, air cooling systems for rolling stock traction engines.

The purpose of the invention is to reduce the hydraulic resistance and increase the degree of purification.

FIG. 1 shows the scheme of the inertial filter; in fig. 2 - filtering screen, section.

The inertial filter contains an intake grille 1, an inlet narrowed air-conducting channel 2, a filtering grid 3, a trap 4, a dust channel 5, an aerodynamic cleaner (ejector) 6 and an expanding air outlet channel 7. The filtering grid 3 is made in the form of triangular plates 8 profile fixed in one inclined row (Fig. 2)

The filter is mounted on the side of the vehicle and connected to the suction port of the fan.

Inertial filter works as follows.

Under the action of the fan, the outside air enters through the intake grille 1 and acquires accelerated motion in channel 2. Aerodynamic and gravitational forces act on the dust particles in the air. Under the action of these forces, the particles acquire the corresponding accelerations and directions of motion. In the output section of the channel 2, dust particles have a normal velocity component with respect to the plane of the filtering grid, and when they exit the channel, they are affected by aerodynamic airflow forces acting along a variable curvilinear trajectory. Due to the normal component of the velocity, dust particles under the action of inertial forces continue to move in the direction of the filtering grid and all particles whose size is larger than the minimum limit fall into it. Particles that are smaller than the minimum limit can be carried by the air flow under the influence of aerodynamic forces moving with a change of direction along the grating in channel 7. Particles trapped in 4 on an inclined plane under the action of the suction effect of ejector 6 (large and suspended chalk ue particles) through the dust conduit 5 and the air cleaner aerodynamic path is ejected into the surrounding space. The purified air through the channel 7 enters the fan inlet. Aerodynamic cleaning of the trap is carried out while the vehicle is moving due to

the ejection effect that occurs when an incident air stream passes through the aerodynamic channel 6. Any other device can be used to clean the trap

0 Thus, the main flow of the air being cleaned passes through a curvilinear channel, a mine filtering grid, while the separated dust particles (due to inertial forces) with a small part of the air get trapped through it. In this case, the filtering lattice is made in the form of plates of a triangular profile, arranged in one row and providing different hydraulic resistance in the forward (smaller) and reverse (larger) directions. To remove the separated particles in the tank, the necessary vacuum is created. The height of the slotted channel between the ridge of the 5th flip plate and the plane of the outlet cross section of the filtering grid is determined depending on the flow characteristics of the filter (flow velocity) and the maximum minimum particle size of the dust that must be caught by the filter. Under these conditions, The particle of minimum size and its movement into the trap is mainly determined by the aerodynamic forces of the flow.

The inertial filter of the proposed design allows high-quality air purification and provides a decrease in hydraulic resistance.

Claims (1)

0 claims An inertial filter comprising a housing, an air intake grille, inlet and outlet air ducts, a filter grill connected through a dust collector and a dust channel with an aerodynamic cleaner, characterized in that, in order to reduce flow resistance and increase the degree of cleaning, the inlet and outlet channels are curved confusion-diffuser type and are located at an angle to each other with an opening in the place of their conjugation in the lower part, and the filtering lattice is made with a profile that has a much larger by 5 by hydraulic resistance in the opposite direction downstream than in the forward direction and installed in the opening.