RU2543211C1 - Automotive engine air filter blowoff device - Google Patents

Abstract

FIELD: engines and pumps.

SUBSTANCE: proposed device comprises case, mandrel to secure filter, feed and discharge pipes, nozzles and ejector. Said mandrel incorporates filter fastening and revolving mechanisms composed of two stepwise-control supports with bearing rollers and one smooth-control support with drive drum arranged thereat. Feed pipe accommodates air pressure control valve connected by pipes with nozzles arranged in pairs on filter inner and outer sides.

EFFECT: easier servicing.

4 cl, 4 dwg

Description

The invention relates to treatment equipment, mainly to devices for cleaning air filters of internal combustion engines.

A device for cleaning filters (USSR Author's Certificate No. 1247052 A1, class B01D 41/00. A device for cleaning filters. AM Rasolko, AD Pashin, AS Sai, KK Kaniev, S.K. Asatov. Application No. 3816692 / 23-26 of 11/28/84. Publish. 07/30/86. Bull. No. 28). The device comprises a casing, a mandrel for securing the filter, a rotationally mounted pipe supplying compressed air, and a pipe discharging cleaning products, discharge nozzles installed at an angle to the filter surface.

The filter cleaning process is as follows. Compressed air is supplied to the inlets of the eccentric rotation mechanism, acts on the blades, causing the shaft to rotate. When the blade reaches the outlet, compressed air enters the annular cavity and then through the channels to the nozzles through which the filter is purged. At the same time, the air leaving the nozzles acts on the inner surface of the filter, causing it to rotate on the ring around the eccentric. Compressed air drives the shaking mechanism, which is a piston. The frequency of shaking is set by the throttle.

The disadvantages of the device are its stationarity, design complexity, the implementation of filter cleaning of only one size.

A device for cleaning filters is known (USSR Author's Certificate No. 1064985 A, class B01D 41/00, Device for cleaning filters. R.M.Savrasov, Yu.S. Epiketov and A.A. Mitrozayev. Application No. 3482410 / 23-26 from 08.09.82. Publish. 07.01.84. Bull. No. 1), taken by us as a prototype. The device includes a housing, a mandrel for securing the filter, mounted for rotation, the inlet and outlet pipelines with discharge and suction nozzles and a shaking mechanism, equipped with an ejector mounted on the discharge pipe, the discharge nozzles are angled to the surface of the filter, and the suction nozzles are installed in relation to to them with an offset along the rotation of the filter. The device is equipped with a differential pressure gauge connected to the body cavity and the supply pipe.

The device operates as follows. The filter to be cleaned is installed in the housing on the mandrel, compressed air is introduced into the filter cavity, which, breaking out of the nozzles and striking tangentially against the filter surface, causes the latter to rotate. The torque is enhanced by the rarefaction of air from the outside of the filter created by the ejector in the suction pipelines and the offset location of the latter. Together with the filter, the plate rotates, which causes axial oscillation of the filter, which contributes to the quality of cleaning. The moment when the filter is cleaned is determined by the differential pressure gauge when the resistance to air passage through the filter is reduced to normal.

The disadvantage of this device is the maintenance of filters of only one size.

The invention consists in the following.

The objective of the invention is to reduce the complexity of maintenance of air filters of internal combustion engines of various sizes.

The technical result is the expansion of the range (sizes) of filters served by the device through the use of a mechanism for attaching and rotating filters of various sizes.

The specified technical result in the implementation of the invention is achieved by the fact that in the mandrel for securing the filters of the known device there is a mechanism for attaching and rotating filters of various sizes, consisting of two stepwise adjustable calipers with support rollers and one continuously adjustable caliper with a driving drum fixed on it.

Figure 1 presents a diagram of the proposed design of a device for purging air filters of automotive engines (side view).

Figure 2 presents a view A of Figure 1 with details of the structures of the fastening and rotation mechanism of the filters and their purge systems.

Figure 3 presents a side view of the proposed design of a device for purging air filters of tractor engines and with details of the mounting mechanism and rotation of the filters, their purging systems.

Figure 4 presents a design diagram of the purge nozzle.

A device for purging air filters of tractor engines includes a housing 1 (Fig. 1), a mandrel for securing the filter 2, having a filter mounting and rotation mechanism, including two stepwise adjustable calipers 3 (Fig. 1, Fig. 2) with support rollers 4 and one continuously adjustable caliper 5 with a driving drum 6 fixed on it, leading 7 and leading 8 pipelines included in the filter purge system with compressed air and removal of cleaning products, pairs of purge nozzles 9 mounted on the outside of the filter (external purge nozzles) and the inner side of the filter (internal purge nozzles 10) connected by pipelines 11 to the air pressure regulator 12, the ejector 13.

The driving drum 6 and the support rollers 4 have a length not less than the height of the highest filter served on this device.

The mechanism of fastening and rotation of the filters can have a different drive (mechanical, pneumatic, hydraulic, electric). For example, when using a pneumatic actuator, its pneumatic cylinder 14 (FIG. 2) moves a smoothly adjustable caliper 5 with a driving drum 6 fixed to it along the guides 15. The other two calipers 3 have step adjustment, move manually as necessary (when setting the installation of filters larger or smaller ranges of diameters), are fixed with pins 16 and have several, for example three, fixed positions, which provides the ability to adjust to the desired range of filter diameters.

The driving drum 6 is rotationally driven by an electric, pneumatic or hydraulic motor and rotates the installed filter. The external 9 and internal 10 purge nozzles are installed with an offset, the internal purge nozzles 10 have a telescopic design to adapt to the height of the installed filter, made in the form of tubes of square or rectangular cross section, each of which consists of at least two tubes inserted one into the other. Each purge nozzle (Figure 4) has cuts with a width of 0.8-1.2 mm along the entire length of the face, which is directed to the filter. The blowing nozzles have plugs 17 at the top and plugs 21 at the bottom. On each upper plug 17, lugs 18 are mounted on which a thrust roller 20 is installed via the axis 19. A fitting for supplying compressed air 22 from the pipe 11 is connected to the hole of one of the plugs 17 or 21 or one of the faces of the purge nozzle. External purge nozzles 9 are mounted on stepwise adjustable calipers 3, and the internal purge nozzles 10 on the mechanism for ensuring the necessary clearance between the inner nozzle 10 and the filter. The mechanism for ensuring the necessary clearance between the inner nozzle 10 and the filter consists of a rocker arm 23 fixed by a central part via an axis 24 to a stepwise adjustable caliper 3. An air cylinder 25 is connected to one end of the rocker arm 23, which also rests on a stepwise adjustable caliper 3, and to the second support roller 26. The internal purge nozzles 10 are moved by pneumatic cylinders 25 into the filter of the rollers 26. The support rollers 26 are mounted with respect to the purge nozzles 10 so that when touched and a support roller 26 with a filter, the necessary distance (10 - 20 mm) from the internal blowing nozzle 10 to the filter surface is automatically set. The return of the rocker arm 23 to its original position is carried out using springs 27, and a continuously adjustable caliper 5 - spring 28.

The filter cleaning process is as follows. Pre-manually move the stepped adjustable calipers 3 to a position corresponding to the range of diameters of the served filters, and are fixed with pins 16.

The serviced filter is mounted on stepwise adjustable calipers 3 and a continuously adjustable caliper 5 between the external 9 and internal blowing nozzles 10 vertically. Compressed air through a pipeline 7 is supplied to the air pressure regulator 12. The pneumatic cylinder 14 moves a smoothly adjustable caliper 5 with a driving drum 6 until it stops against the filter. The pneumatic cylinder 25 acts on one of the ends of the rocker arm 23, while the support rollers 26 are moved towards the filter until it stops. The drive of the driving drum 6 is turned on, with the help of which the filter rotates slowly. The filter is rotated between the pairs of internal 10 and external 9 purge nozzles, which direct a stream of compressed air to the filter element, which ensures filter cleaning. The cleaning products are discharged outside the device body 1 through the outlet pipe 8 due to the ejection effect provided by the ejector 13. After the air supply is interrupted, the return springs 27 move the internal blowing nozzles 10 away from the filter, and with the help of the spring 28, the adjustable support 5 with the driving drum 6. Then remove the clean filter from the device.

Claims (4)

1. A device for purging air filters of automotive engines, comprising a housing, a mandrel for securing the filter, inlet and outlet pipelines, nozzles, an ejector, characterized in that the mandrel for securing the filter has a filter mounting and rotation mechanism made in the form of two step-adjustable calipers with supporting rollers and one continuously adjustable caliper with a driving drum fixed on it, and in the supply pipe an air pressure regulator is installed, connected by a pipe to the nozzles, arranged in pairs on the inside and outside of the filter. 2. A device for purging air filters of automotive engines according to claim 1, characterized in that the nozzles located on the inside of the filter are made in the form of a telescopic structure of square or rectangular tubes having cuts along the face directed towards the filter. 3. The device for blowing air filters of automotive engines according to claim 1, characterized in that each nozzle located inside the filter is equipped with a mechanism to provide the necessary clearance between the nozzle and the filter mounted on a stepwise adjustable caliper and including a rocker arm, a pneumatic cylinder and a support roller. 4. A device for purging air filters of automotive engines according to claim 1, characterized in that the nozzles located on the inside of the filter are offset with respect to nozzles located on the outside.

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