RU2262995C2 - Piezoelectric device for ultrasonic cleaning of aircraft filters - Google Patents

Abstract

FIELD: cleaning in presence of liquid or steam.

SUBSTANCE: device comprises section for cleaning in the solution of washing means, section for washing to remove the solution of washing means, and section for rinsing and drying. Each section is composed of bath filled with the washing solution and unit for rotation of filtering members and unit for preparing washing solution that has the tank provided with the heaters and pickups for measuring level and temperature of the washing solution whose inlet is connected with the tank through the filter and whose outlet is connected with the bath through the check valve. The cleaning and washing sections comprise N and K ultrasonic generators, respectively. Each ultrasonic generator has unit for start, power amplifier, unit for protecting against overloading, unit for self-correcting of frequency, and ultrasonic converter mounted on the emitting diaphragm provided with the emitting and back linings. The piezoelectric members are interposed between linings. The output of the converter made of the working surface of the emitting lining is connected with the emitting diaphragm. The drying section has fan, heater, and drying chamber with the gauge for measuring the temperature of the heated air. The fan is connected with the drying chamber through the heater. Between the cleaning and washing sections is the member for monitoring the pressure-tightness of filtering members composed of the bath filled with the washing solution and unit for rotation of filtering members and check valve connected with the compressed gas supply system through the head meter and pressure regulator. The outlet of the unit for recirculation of the washing solution in the cleaning and washing sections is connected with the compressed air supply system through the air valve.

EFFECT: expanded functional capabilities.

3 dwg

Description

Technical field

The invention relates to ultrasonic cleaning of filter elements and filter packages of fuel, oil, hydraulic and pneumatic systems of aircraft from mechanical particles, resinous substances and coking products in washing solutions using technological effects of the phenomenon of cavitation in liquids and can be used in various industries.

State of the art

A device for ultrasonic cleaning of aircraft filter elements and filter bags containing an ultrasonic generator, a bath with a washing solution and a block reciprocating movement of filter elements and filter bags and a block for preparing a washing solution containing a tank, a filter block and a pump for supplying a washing solution through the filter block to the bath, the walls of which an annular magnetostrictive converter is integrated (A.V. Donskoy, OKKeller, G.S. Kratysh. Ultrasonic electrotechnological installations. Leningrad, Energ Publishing House, Leningrad Branch, 1982, pp. 144-149). Due to the installation of excess pressure in the bath when moving the filter elements and filter bags, the washing solution is directly pumped through them. The disadvantage of this device is the insufficient quality of cleaning, since cavitation flows in the washing solution arising under the influence of acoustic radiation are insufficient due to the conversion of electrical energy into acoustic energy at one frequency (one ultrasonic generator and one magnetostrictive transducer). The magnetostrictive converter is characterized by a low efficiency. Creating a direct pumping of the washing solution at an overpressure in the bath is achieved due to complex structural solutions, while such pumping is not very efficient. The use of only one bath with a washing solution leads to the presence of residual cleaning solution on the filter elements and filter bags, which requires additional washing from them in other devices.

Closest to the proposed one is a piezoelectric device for ultrasonic cleaning of aviation filter elements, filter bags and filters, which contains a bath with a washing solution and N ultrasonic generators, each of which consists of an initial start-up unit, a power amplifier, an overload protection unit, an automatic frequency control unit and an ultrasonic a transducer mounted on a radiating membrane and containing a radiating and rear lining, between which are located the piezoelectric elements, while ruktsionny output of the ultrasonic transducer as the working surface of the radiating laths connected with the radiating membrane (utility model №29249, MPK7 In 08 3/12 in). The device can be used to clean contaminants in a solution of technical detergent. This device may have a washing solution preparation unit containing a tank with heaters and level and temperature control sensors, a filter, a check valve and a washing solution recirculation unit, the inlet of which is connected to the tank through a filter and the outlet through a check valve to the bathtub. For washing filter elements and filter bags from a solution of technical detergent, this device can have another piezoelectric device with a block for preparing a washing solution with the number of ultrasonic generators K and using tap water as a washing solution. To remove residual salts of technical detergent, a rinse bath can be introduced into the device with a rinse solution preparation unit containing a tank with a level control sensor, a filter, a check valve and a rinse solution recirculation unit whose inlet is connected to the tank through a filter and the outlet is through a check valve with a rinse bath. The device may also have a drying unit comprising a fan, a heater and a drying chamber with a temperature sensor, the fan being connected through the heater to the drying chamber. In each bath with a washing solution and a rinse solution, a rotation unit for filter elements and filter bags can be installed.

The disadvantages of this device are as follows. Filter elements and filter bags have a cylindrical shape with an internal cavity and their operation in aircraft consists in direct pumping of liquid or air (from the outside through the filter mesh into the internal cavity and from it through the outlet into the outlet pipe), that is, contaminants accumulate on the outer surface of the mesh and inside the window of her cells. Under the influence of chemical processes of the influence of surfactants of technical detergents and the phenomenon of ultrasonic cavitation, softening and removal of contaminants from the surface of the mesh of filter elements and filter bags occurs. However, for small window sizes of mesh cells (for example, from 5 to 16 μm), softened contaminants are removed directly from the cell window even under the influence of cavitation in some cells, and some of these contaminants from the cell window enter the internal cavity and may remain there after completion of all cleaning operations. The device also does not allow the operation of monitoring the tightness of filter elements and filter bags (checking for damage to the filter mesh), which requires this operation to be completed after cleaning and drying, and in a fire hazardous solvent, since moisture removal from the filter elements and filter bags that is natural due to evaporation is required by reason for completing cleaning and drying before this operation.

SUMMARY OF THE INVENTION

The tasks to which the claimed technical solution is directed is to improve the quality of cleaning and improve the tightness control of filter elements and filter bags. The technical results obtained during the implementation of the device are to increase the efficiency of cavitation due to the introduction of reverse pumping of the washing solution and air pulses through the filter elements and filter bags and mechanical brushing of the outer surface of the filter discs of the filter bags, expanding technological capabilities by removing residual technical detergent solution by blowing air and tightness control of filter elements and filter bags in a fireproof solution e technical detergent. These technical results are achieved by the fact that in a device containing technological positions for cleaning in a solution of technical detergent, washing with tap water from a solution of technical detergent, rinsing in a solution of rinsing and drying with heated air, where each of the positions of cleaning, washing and rinsing consists of a bath with an appropriate detergent solution and at least one block of rotation of the filter elements and filter bags and the block for the preparation of the washing solution containing the tank the elements and sensors for monitoring the level and temperature of the washing solution, the filter, the non-return valve and the recirculation unit of the washing solution, the inlet of which is connected to the tank through the filter and the outlet through the non-return valve with a bath, the cleaning and washing positions contain N and K ultrasonic generators, respectively of which consists of an initial start-up block, a power amplifier, an overload protection block, an automatic frequency block and an ultrasonic transducer mounted on a radiating membrane containing a radiating and rear adki, between which there are piezoelectric elements, and connected by a structural output in the form of a working surface of a radiating lining with a radiating membrane, and the drying position contains a fan, a heater and a drying chamber with a temperature sensor for heated air, while the fan is connected through the heater to the drying chamber, between positions for cleaning and flushing, the position of monitoring the tightness of filter elements and filter bags was introduced, containing a bath with a fireproof washing solution and a rotation block of filter elements and a filter bags and a non-return valve connected through a pressure gauge and a reducer to the compressed gas network at the cleaning and washing positions, the outlet of the washing solution recirculation unit is connected through the air valve to the compressed air network for its pulsed supply to the internal cavity of filter elements and filter bags, to the cleaning and washing positions, tightness and rinsing control introduced a cartridge to accommodate filter elements and filter bags, docked with a check valve and a rotation unit and configured to rotate the filter in it elements and filter bags to ensure that the washing solution, compressed gas and compressed air are sealed from the non-return valve into the internal cavity of the filter elements and filter bags and pumped therefrom through the filter mesh of the filter elements and filter bags into the bath with the washing solution, and brushes for mechanically cleaning the outer surface are introduced filter disks of filter bags installed on the cartridge, and an air gun to remove residual cleaning solution from filter elements and filter bags.

List of drawings

Figure 1 shows an example of a circuit for constructing a device. Figure 2 shows an example of building a block diagram of an ultrasonic generator. Figure 3 shows an example of placing a filter bag in a cartridge.

The possibility of carrying out the invention

The device, as shown in Fig. 1, consists of technological positions for cleaning 1, tightness control 2, washing 3, rinsing 4 and drying 5, which are functionally complete sets of interconnected blocks, nodes and elements installed in a single frame 6 made for example, from rectangular metal pipes or corners.

Each of the technological positions, except for the drying position 5, contains a bath 7 made of stainless steel sheet with a washing solution 8 and a rotation unit 9 of the filter elements 10 and filter bags 11 (see Fig. 3) and a check valve 12. With a rotation block 9, made, for example, in the form of a shaft with a transverse pin pin driven into rotation by an asterisk mounted on it by means of a chain drive from a common drive (not shown in Fig. 1), and a cassette 13 is docked with a check valve 12, in which it is attached through a rubber plug 14 filter element 10 or filter bag 11. The cassette 13 (see figure 3) consists of racks 15 on which a pipe 16 is installed that provides the supply of the washing solution 8 through the hole in the plug 14 into the internal cavity of the filter element 10 or filter bag 11 and serves as its handle as its upper part to move the cartridge 13, the clamping lock 17 and the shaft 18, which transfers rotation from the rotation unit 9 and the washing solution 8 from the check valve 12 to the filter element 10 or filter bag 11. The check valve 12 is designed so that it opens in the forward direction ( filtropaketu filter element 10 or 11) for docking with it the cassette 13 (when inserted therein conduit 16) and closes when the undocking. The filter bag 11 can be both assembled and disassembled. In the latter case, the filter bag 11 consists of a hollow cylinder, on which the filter disks 19 are installed through the sleeves 20 and fixed with a threaded nut 21. The hollow cylinder has slots through which the washing solution passes from the inner cavity of the filter disks 19 through their filter mesh into the bath 7. For mechanical cleaning the outer surface of the filter disks 19 on the racks 15 of the cartridge 13 has a holder 22 with brushes 23 made, for example, from bundles of hard nylon fishing line mounted on wire rods.

The cleaning positions 1, washing 3 and rinsing 4 contain a washing solution preparation unit consisting of a tank 24 with heaters 25, level control sensors 26 made, for example, in the form of conductometric single-electrode rods and controlling the upper (level of the bay) and lower (emergency level) the levels of the washing solution 8, and a temperature sensor 27, which is a standard resistance thermoconverter and used to measure and control the temperature of the washing solution 8, filter 28 of the rough cleaning of the washing solution a thief 8, made, for example, in the form of a metal mesh with a mesh size of 0.63 × 0.63 mm, a recirculation unit 29, comprising, for example, a pump 30, a check valve 31 and a fine filter 32 of the washing solution 8, made based on typical aviation filter elements and a non-return valve 12. Tank 24 is connected through a filter 28 to the inlet of the recirculation unit 29, the output of which through the non-return valve 12 is connected to the bath 7. At the positions of cleaning 1 and washing 3, the recirculation unit 29 is connected through an air valve 33, controlled, for example, by pneumatic limiter, with a compressed air network 34. At position 1, an air gun 35 of a typical design is connected to the compressed air network 34.

At the position of the tightness control 2, the check valve 12 is connected through standard head 36 and the gear 37 to the compressed gas network 38, which can be used as air or nitrogen.

The bath 7 at the positions of cleaning 1, washing 3 and rinsing 4 has an overflow system 39, ensuring trouble-free operation of the recirculation mode of the washing solution 8, and discharge into the tank 24 (not shown in Fig. 1). The tank 24 has a supply system of the corresponding detergent solution 8 from the respective lines, overflow and discharge of the detergent solution 8 into the sewer or neutralization system (not shown in FIG. 1).

The cleaning positions 1 and washing 3 contain, respectively, N and K of ultrasonic generators 40 (see FIG. 2), each of which consists of an initial start-up block 41, a power amplifier 42, an overload protection block 43, a frequency lock 44 and an ultrasonic transducer 45 (see also figure 1) mounted on a radiating membrane 46, which is the bottom or side wall of the bath 7, and containing a radiating 47 and a back 48 pads, between which there are two piezoelectric elements 49. The structural output of the ultrasonic transducer 45 in the form of a working the first surface 50 of the radiating lining 47 is connected to the radiating membrane 46 by welding into the holes in it or gluing to its outer surface. The ultrasonic transducer 45 can be installed in the same ways on the radiating membrane 46, which, for example, is part of a submersible block located inside the bath 7. Figure 2 shows one of the possible options for the connections between the components of the ultrasonic generator 40. The output of the power amplifier 42, made , for example, in a push-pull circuit operating in switching mode, through an overload protection unit 43, made, for example, on a current transformer and a blocking signal driver, is connected to an ultrasonic transducer ers 45, which feedback circuit is connected to the input of the frequency locked loop unit 44 made of, e.g., at the site of the current control and the phase-shifting circuit. The power amplifier 42 has inputs connected to the control outputs of the initial start-up block 41, made, for example, on the basis of a dynistor-resistor-capacitor circuit, an overload protection block 43, and a frequency lock 44. The connections are made by electric wires and conductors. The components of the ultrasonic generators 40, in addition to the ultrasonic transducers 45, can be located in a separate rack and not shown in figure 1.

The drying position 5 comprises a fan 51, a heater 52 and a drying chamber 53 with a temperature sensor 27, while the fan 51 is connected through a heater 52 to a drying chamber 53 having an output 54 for communication with exhaust ventilation 55 and an output 56 for recirculating communication with the fan 51, additionally connected to feed the recirculation mode with the outside air 57.

Baths 7 and the drying chamber 53 are closed by covers 58.

All hydraulic and pneumatic connections of the component parts of the device are made of metal, polypropylene and PVC pipes. All structural parts of the above blocks, assemblies and elements in contact with the cleaning solution 8, compressed air, compressed gas and drying air are made of corrosion resistant materials, for example, stainless steel and polypropylene.

As a cleaning solution 8 can be used: at the positions of cleaning 1 and control tightness 2 - aqueous solutions of technical detergents, such as, for example, "Vertolin-74", "Sinval", "Impulse"; at the flushing position 3 - tap water; at the rinse position 4 - an aqueous solution of Trilon B or distilled water.

The device operates as follows.

Tanks 24 are filled with appropriate detergent solutions 8 to the level of the gulf, determined by the upper level sensor 26. The detergent solution 8 is heated by heaters 25 to the appropriate temperature controlled by the temperature sensor 27 (for example, 75 ± 5 ° C for a solution based on technical detergent "Vertolin -74 ", 40 ± 10 ° С for tap water, 20 ± 5 ° С for Trilon B solution). A washing solution 8 of the appropriate temperature (for example, 20 ± 5 ° C) is poured into the bath 7 at the tightness control position. In the baths 7 at the positions of cleaning 1, washing 3 and rinsing 4, empty (without filter elements 10 and filter bags 11) cartridges 13 are installed, providing the introduction of the pipe 16 into the check valve 12, and the shaft 18 into the rotation unit 9, while the check valve 12 opens in forward direction. Turn on the pumps 30 of the recirculation units 29, which through the coarse filter 28, the check valve 31, the fine filter 32, the check valve 12 and the cartridge 13 pump the washing solution 8 from the tanks 24 into the baths 7 to the overflow level into the overflow system 39. The pumps 30 are turned off . Filling the baths 7 can be done without installing cassettes 13 when using the pipe simulator 16. The check valve 31 prevents the return of the cleaning solution 8 from the bath 7 to the tank 24 after the pump is disconnected from the resulting vacuum in the pipelines when the pump is running. An empty cartridge 13 is removed from the bath 7 at the cleaning position 1 and the filter element 10 is inserted into it through the plug 14. After loading the loaded cartridge 13 into the bath 7, the rotation drive is turned on and at the cleaning position 1 of the pump 30, ultrasonic generators 40 and pulsed (for example, supply - 1 s, pause - 4 s) of compressed air from the compressed air network 34 through the air valve 33. When you turn on the ultrasonic generator 40, it starts to work in the mode of self-oscillations arising due to the fact that the ultrasonic transducer 45 possesses a pronounced inductive-capacitive character, and the power amplifier 42 begins to operate in the switching mode at a frequency determined primarily by the resonance properties of the ultrasonic transducer 45. The current flowing through the ultrasonic transducer 45 also flows through the self-tuning unit 44, which forms on its control feedback voltage proportional to this current and having a phase shift depending on the deviation of this current from the mechanical resonance current ultrasound of the transducer 45. As a result, the operating frequency of the power amplifier 42 is automatically tuned to the frequency of the mechanical resonance of the ultrasonic transducer 45, providing the maximum acoustic power delivered to the washing solution 8. The initial start-up unit 41 generates a pulse sequence that ensures guaranteed start-up of the ultrasonic generator 40 to eliminate the absence of excitation or disruption of generation due to changes in the electromechanical characteristics of the ultrasonic transducer the device 45 when changing the load: changing the type, level and temperature of the washing solution 8, the volume and configuration of the processed filter element 10. The piezoelectric elements 49 convert the ultrasonic frequency electrical signals into mechanical vibrations of the working surface 50 of the emitting lining 47, which due to the propagation of acoustic vibrations in the washing solution 8 create a cavitation effect in it - the formation of air cavities with their subsequent collapse in the form of microexplosion, which ensures the creation of shock waves that tear off pollution from the surface of the filter element 10 and especially effective in the formation of air cavities directly on its surface, and intense flows arising from the fact that each of the ultrasonic transducers 45 operates at its own frequency, since in practice it is impossible to manufacture all ultrasonic transducers 45 with identical characteristics , but not exceeding the standard tolerance for frequencies allowed for use in ultrasonic generators (for example, ± 10% for a frequency of 44 kHz), which contributes to efficient removal of contaminants from the surface of the filter element 10. The reverse (from the internal cavity of the filter element 10 into the bath 7) pumping of the cleaning solution 8, which is carried out by means of the recirculation unit 29, eliminates the ingress of contaminants into the filter element 10 and helps to remove them from the filter mesh cell window. The pulsed air supply of the corresponding pressure allows to obtain a sequence of liquid and air-liquid jets through the filter element 10, which increases the degree of removal of contaminants from the cell window of the filter mesh. In addition, the washing solution 8 moving through the filter screen under the action of ultrasonic radiation makes additional vibrations with an ultrasonic frequency, which helps to detach contaminants from the screen and remove them from the windows of its cells. The rotation of the filter element 10 provides its processing over the entire surface. After the required processing time has ended, the pump 30 and ultrasonic generators 40 are turned off, the lid 58 is opened, the cartridge 13 with the filter element 10 is removed, the washing solution 8 is drained from it and the air gun 35 is inserted into the inlet of the pipe 16 of the cartridge 13, and the remaining washing solution 8, especially its foam, from the inner cavity of the filter element 10. Similarly, the filter bag 11 is cleaned.

When cleaning the filter bag 11 in disassembled form, the actual filter bag is disassembled into the filter disks 19 and installed on the hollow cylinder through the bushings 20, and fixed with a threaded nut 21. In accordance with the size of the filter disks 19, the respective bristles 23 are set out from the holder 22 so that the brushes 23 touch the outer surface filter disks 19 during rotation of the filter bag 11. Installing the filter bag 11 in the cartridge 13 and cleaning it is performed similarly to the filter element 10. In the actual filter bag 11, the gap between the filter disks 19 tstvuet, thus some contamination from the outer surface can not be removed. This problem is solved due to the presence of 11 bushings 20 and brushes 23 in the filter bag.

After cleaning, the cartridge 13 with the filter element 10 or filter bag 11 is installed in the bath 7 at the position of the tightness control 2. For the filter package 11, the holder 22 with brushes 23 is removed from the cartridge 13. The level of the washing solution 8 is set to a value determined by the technology above the upper boundary of the filter element 10 or filter bag 11 (for example, 20 ± 2 mm), draining its excess from the bath 7 into a separate container. The supply of compressed gas to the gearbox 37 from the compressed gas network 38 of the appropriate pressure is opened (for example, 0.15-0.20 MPa), then the gearbox sets the pressure value of the compressed gas supplied to the filter element 10 or filter bag 11, determined by the technology depending on the permissible tightness filter mesh, wetting ability and density of the washing solution 8 (for example, from the range of 0.002-0.008 MPa), increasing it from zero and controlling by a pressure gauge 36. The appearance of 10 separating from the tested filter element or filter pack 11 is the gas bubbles at a pressure lower than the desired feature is damaged filter net or inconsistency its specifications of filtration. The tightness control is carried out during the rotation of the filter element 10 or filter bag 11, so you can accurately determine the location of damage. The gear 37 reduce the pressure of the compressed gas to zero and close its flow. The cartridge 13 with the filter element 10 or filter bag 11 is removed from the bath 7 at the tightness control position 2 and with a working filter element 10 or filter disks 19, the filter bag 11 is installed in the bath 7 at the washing position 3 to wash the filter element 10 or filter bag 11 from the residues of the washing solution 8 from the cleaning position 1 and tightness control 2. If the degree of damage to the filter element 10 or filter disks 19 of the filter bag 11 is higher than the permissible norm, they are rejected and their further processing on the device is not carried out, which reduces labor costs and cleaning the set of filter elements 10 and filter bags 11.

Processing the filter element 10 or filter bag 11 at the flushing position 3 is similar to processing at the cleaning position 1, only carried out in tap water and without using brushes 23 and an air gun 35. To improve the quality of washing, constant refill of the tank 24 from the mains water supply can be established to organize flow mode (gradual exchange of tap water in the tank 24 with the simultaneous removal of floating foam constituents of the detergent solution 8 from the position of cleaning 1 and the control of tightness 2 through Stem overflow into the sewer).

The filter element 10 or filter bag 11 is rinsed in the same way with Trilon B solution at the rinse position 4 with the difference that ultrasonic generators 40 and pulsed air supply are not used here.

To remove moisture, the filter element 10 or the filter bag 11 is removed from the cartridge 13 and placed in a basket (not shown in Fig. 1), which is installed in the drying chamber 53 at the drying position 5, and the filter bag 11 is pre-disassembled and placed in an unassembled form. The fan 51 and the heater 52 are turned on. The fan 51 draws outside air 57 through the filter and drives it through the heater 52 and the drying chamber 53 in recirculation mode - from the outlet 56 of the drying chamber 53, the air through the duct enters again into the intake pipe of the fan 51. Using the recirculation mode and adjustable shutters of the exit 54 allows a slight intake of external air 57 to be achieved with an optimal drying mode - the minimum consumption of electric energy for heating due to the small intake of cold outside th air 57 and effective removal of moisture vapor in the exhaust ventilation 55 with a slight, but sufficient venting through the outlet 54. The information from the temperature sensor 27 provides heated air to the desired temperatures in the zone of the chamber 53 (e.g. 90 ± 10 ° C).

In the process, the heaters 25 and 52 with temperature sensors 27 provide automatic maintenance of the temperature of the washing solutions 8 and the drying air in the required range. The emergency level sensors 26 ensure the safe operation of the heaters 25 and the pumps 30. The covers 58 are closed during processing at all positions except for the tightness control position 2, while at the cleaning positions 1 and flushing 3 there are cover position sensors that disable the ultrasonic generators 40 when opening the ultrasonic generators 40 lids to reduce noise and eliminate contact between the operator’s hands and cavitating cleaning solution

When using special cartridges instead of cartridge 13, the device allows for the cleaning of glass containers and other products. When using the basket, various small parts can be cleaned.

Thus, the proposed design of a piezoelectric device for ultrasonic cleaning of aircraft filter elements and filter bags can improve the quality of cleaning due to the following factors:

- higher cavitation efficiency, ensured by the imposition on the ultrasonic vibrations of the washing solution of additional ultrasonic vibrations of the moving washing solution that occur when it is pumped back through the filter elements and filter bags, and air pulses;

- eliminating the ingress of washable contaminants into the filter elements and filter bags and additional mechanical impact (separation) on the pollution in the windows of the filter mesh cells, provided by the introduction of back pumping of the cleaning solution and air pulses through the filter elements and filter bags;

- reducing the residues of the washing solution at the cleaning position by blowing through the filter elements and filter bags of compressed air with an air gun;

- more efficient removal of contaminants from the filter discs of the filter bags at the cleaning position by the combined action of ultrasonic cavitation and mechanical cleaning of the outer surface of the filter discs with brushes;

- the effective relationship of ultrasonic generators, washing solution, compressed air, brushes and an air gun, provided by the introduction of the cartridge, joined simultaneously with the check valve and the rotation unit and made with the possibility of a tight input of the cleaning solution and pulses of compressed air from the check valve into the internal cavity of the filter elements and filter bags during their rotation, which allows to obtain a process of back pumping of these media under ultrasonic action with simultaneous mechanical processing Otke brushes filtrodiskov filtropaketov outer surface, and an air gun to inject into the inlet of the cassette.

The introduction of the tightness control position between the cleaning and washing positions in the design allows expanding the technical capabilities of the device, conducting this process in a fireproof solution of technical detergent, and reducing the overall complexity of cleaning.

Claims (1)

Piezoelectric device for ultrasonic cleaning of aviation filter elements and filter bags containing technological positions for cleaning in a solution of technical detergent, washing from a solution of technical detergent, rinsing and drying, each of the positions for cleaning, washing and rinsing consists of a bath with an appropriate washing solution and block rotation of filter elements and filter bags and a unit for the preparation of a washing solution containing a tank with heaters and level control sensors and temperature detergent rounds, a filter, a non-return valve and a recirculation unit for the detergent solution, the inlet of which through the filter is connected to the tank, and the outlet through the non-return valve with a bath, the cleaning and washing positions contain N and K ultrasonic generators, respectively, each of which consists of an initial a start-up, a power amplifier, an overload protection unit, an automatic frequency control unit and an ultrasonic transducer mounted on a radiating membrane containing a radiating and a back plate, between which there are piezoe elements, and connected by a structural exit in the form of a working surface, radiating pads with a radiating membrane, and the drying position contains a fan, a heater and a drying chamber with a heated air temperature sensor, while the fan is connected through a heater to the drying chamber, characterized in that between the cleaning positions and washing, the position of control of the tightness of the filter elements and filter bags is introduced, containing a bath with a washing solution and a block of rotation of the filter elements and filter bags and a check valve connected th through a pressure gauge and a reducer with a compressed gas network, at the cleaning and flushing positions, the outlet of the washing solution recirculation unit is connected through an air valve to the compressed air network, a cartridge has been inserted at the cleaning, flushing, tightness and rinse control positions to accommodate filter elements and filter bags, coupled with the reverse a valve and a rotation unit, ensuring a tight entry of the washing solution, compressed gas and compressed air from the non-return valve into the internal cavity of the filter elements and filter bags, and on For cleaning, brushes mounted on the cassette and an air gun are introduced.

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