Inlet low-impact type pulse cleaning device for aviation equipment

Abstract

According to the inlet low-impact type pulse cleaning device for the aviation equipment, the through-flow area of the connecting position of a liquid inlet pipe and a pump source is not changed, the through-flow area of a first valve element and a second valve element at the rear end can be periodically adjusted, and the sum of the flow area of the first valve element and the flow area of the second valve element is always kept unchanged; a pulse cleaning effect is formed on the flushed pipeline; therefore, one of the pulsation cleaning through-flow area and the backflow oil tank through-flow area is linearly increased, the other one of the pulsation cleaning through-flow area and the backflow oil tank through-flow area is linearly decreased, the increased number and the decreased area are completely consistent, no matter the pulsation condition of the tail end changes, the inlet always keeps the unchanged through-flow area, and in the pulsation switching process, the pulsation cleaning through-flow area and the backflow oil tank through-flow area are not changed. No pressure impact exists at the liquid inlet; a large-flow pump does not need to be configured, an outlet shunting mode is adopted, overflow and overflow loss are avoided at an inlet of the cleaning device, a low-pressure oil return mode is adopted for oil backflow, heating is small, the energy-saving effect is obvious, and the energy cost can be remarkably saved after long-term use.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of cleaning of aviation equipment, and particularly relates to an inlet low-impact pulsating cleaning device for aviation equipment. BACKGROUND

[0002] In the field of aviation support equipment, cleaning operation is a key link for ensuring the performance of aviation equipment and prolonging the service life. Especially for core components such as engine fuel systems, hydraulic pipelines and cooling circuits, internal residual oil stains, metal debris, carbon deposits and oxidized impurities need to be removed through efficient cleaning to avoid impurities blocking the flow passage of valve parts or aggravating the wear of components, thereby preventing equipment failure.

[0003] The current cleaning process commonly used for aviation equipment is: pipeline purging, soaking, ultrasonic cleaning, circulating flushing and drying. Circulating flushing is an important part of pipeline cleaning. Circulating flushing uses the actual medium used in the pipeline system as the flushing medium, which can effectively avoid the residual pollution of other cleaning media to the pipeline. The flushing circuit mainly consists of a flushing pump, a high-precision filter and a pipeline to be flushed. By connecting the pipeline to be flushed with the liquid supply port and the liquid return port of the flushing circuit, a flushing circuit is established. The flushing pump pressurizes the flushing medium and pumps it to the liquid supply filter, and after filtering out the excess, it enters the pipeline to be flushed to flush the pipeline. The flushed oil returns to the liquid return filter in the flushing equipment for secondary filtration and then returns to the equipment tank. Through the continuous operation of the flushing circuit, the two-stage filters in the circuit continuously filter out the excess in the pipeline. It ensures that the number of particles of each particle size in the pipeline meets the cleaning process requirements.

[0004] There are currently three technical paths for circulating flushing: One is the high-pressure continuous flushing mode, which directly impacts the inside of the component to be cleaned by outputting constant high-pressure fluid from a high-pressure pump. Although this type of device can achieve strong impurity stripping effect, high-pressure fluid can easily damage the precision inner wall of aviation equipment, especially for light-weight material components such as aluminum alloy and titanium alloy, which may cause irreversible problems such as deformation and cracking. At the same time, aviation pipelines have many bends, and the pressure of the high-pressure jet flushing medium decreases rapidly after passing through the pipeline bends, resulting in that the flushing effect is good near the liquid supply port and poor far from the liquid supply port, and the qualified rate of flushing is low.

[0005] The second is the low-pressure continuous flushing mode: according to the fluid dynamics Reynolds number Re = (p x v x d) / mu (p: fluid density (unit: kg / m³) v: fluid average flow rate (unit: m / s) d: single diameter of the pipeline (unit: m) mu: fluid dynamic viscosity (unit: Pa s)), by increasing the fluid flow rate inside the pipeline, Re≥2300 can be realized, so that the fluid inside the pipeline is in a turbulent state, and the softening, rotary cutting and slag carrying effect of the medium are used to realize the efficient flushing of the equipment on the pipeline. The pipe diameter of the aviation equipment ranges from DN4 to DN125, and a very large flow rate is required when cleaning large-diameter pipelines. For example, the flow rate required for a DN125 specification pipeline to reach a turbulent state is 23467.58 L / min, and the energy consumption is very large. The equipment is large in size and high in cost. Generally, considering the economy, the low-pressure continuous flushing mode is mainly used for flushing pipelines with a pipe diameter of DN15 and below. The number of compatible pipeline specifications is small, and it cannot meet the flushing needs of most pipeline specifications.

[0006] The third is the pulsating cleaning mode, which periodically opens and closes the liquid supply port or changes the flow area of the liquid supply by setting a pulsating cleaning device at the liquid supply port, realizes the pulsating flow output of the flushing medium, and enables the equipment to produce a turbulent flushing effect that requires a large flow rate. The main features of the pulsating cleaning compared with the traditional cleaning equipment are: having a pulse impact effect: the periodically changing flow forms a "pulse wave", and the peak produces a large flow rate, directly impacting the pipe wall dirt, breaking the adhesion between the dirt and the base, and promoting its shedding. Having cavitation effect: the instantaneous flow rate decreases (pulse wave valley), the internal pressure of the flushing medium decreases, and a large number of small bubbles (cavitation bubbles) are always separated out; when the pressure rises, the bubbles burst rapidly, producing local high-frequency impact and micro-jet, stripping stubborn dirt, especially for dirt in narrow gaps. Having a turbulent flow enhancement effect: pulsating flow breaks the laminar flow state of traditional constant flow, making the cleaning liquid form strong turbulence in the pipeline. The transverse mixing action of the turbulent flow can make the cleaning liquid more fully contact the dirt surface, and at the same time, the stripped dirt is timely removed, avoiding secondary adhesion.

[0007] The main problems of the pump control type pulsating cleaning device are: the pulsating flow output is realized by changing the rotating speed of the pump source or the displacement of the oil pump. The frequency converter or servo controller is used to change the rotating speed of the pump source, and the power of the pump source motor is large. In order to reduce the harmonic, reduce the mechanical impact, avoid the motor overcurrent and overvoltage, the switching time of 0~power frequency is not less than 8s, the switching time is long, the pulse wave at the end is relatively flat, and the pulse effect is poor. The variable displacement usually needs to introduce the swash plate variable mechanism and the control proportional valve, and the cost is high. When the variable pump switches the displacement at high frequency, the variable oil will impact the variable structure, and faults such as hitting the disc and abnormal heating will occur. The liquid cooling equipment of the protection equipment cannot establish an effective friction pair due to the low viscosity of the medium, and the service life of the oil pump is very short.

[0008] The main problems of the valve control type pulsating cleaning device are: the periodic pulsation of the fluid entering the flushed pipeline is realized by changing the output flow area of the liquid supply. When the pulse wave valley is formed, the flow area of the pulsating device is sharply reduced, most of the flushing medium generated by the pump source is instantaneously blocked between the pump source and the pulsating cleaning device, and the water hammer impact is generated, the pressure impact wave several times higher than the rated pressure acts on the pump source, pipeline and pulsating cleaning device, and abnormal vibration and noise are generated, which seriously affects the service life of the flushing equipment. At the same time, when the end flow is reduced, the excess flow generated by the pump source needs to be overflowed back to the oil tank, which causes energy waste and serious equipment heating.

[0009] In summary, the traditional high-pressure continuous flushing is far away from the liquid supply port, and the flushing effect is poor. The low-pressure continuous flushing device has large flow demand, high equipment cost, large equipment area and small pipe diameter range. The pulsating effect of the new pump control type pulsating cleaning device is poor, the inlet of the valve control type pulsating cleaning device bears periodic pressure impact, the service life of the equipment is low, the noise is large, and the energy waste is serious. In view of the technical problems existing in the cleaning device industry, a new type of cleaning device with low impact at the inlet and periodic pulsation of the outlet flow is needed to adapt to the cleaning demand of precise aviation equipment. SUMMARY

[0010] The purpose of the present application is to provide an aviation equipment with an inlet low impact type pulsating cleaning device. The flow area of the liquid inlet connected with the pump source remains unchanged, the other end of the liquid inlet is provided with a first outlet and a second outlet, the flow area of the first outlet and the second outlet can be periodically adjusted, the sum of the flow area of the first outlet and the second outlet remains unchanged, so that the pulsating cleaning effect is formed in the flushed pipeline; and the pulsating cleaning flow area and the flow area of the return oil tank always remain linear increase and linear decrease, the increased amount and the reduced area are completely consistent, the flow area of the liquid inlet remains unchanged regardless of the change of the end pulsation, the flow area of the liquid inlet remains unchanged, and there is no pressure impact in the liquid inlet during the pulsating switching process.

[0011] The application is achieved by the following technical solutions: The application discloses an inlet low-impact pulsating cleaning device for aviation equipment, which comprises a liquid inlet pipeline, a first flow valve, a second flow valve and a synchronous driving mechanism, the liquid inlet pipeline is provided with a liquid inlet, a first outlet and a second outlet, the first flow valve is in butt joint with the first outlet, and the second flow valve is in butt joint with the second outlet; the synchronous driving mechanism is located above the first flow valve and the second flow valve, and is used for controlling the opening and closing of the first flow valve and the second flow valve. The first flow valve comprises a first valve body, and a first valve core is arranged in the first valve body; the second flow valve comprises a second valve body, and a second valve core is arranged in the second valve body; the first valve core and the second valve core are both spherical structures and have the same structure; the first valve body and the second valve body have the same structure; flow channels are arranged in the first valve core and the second valve core; through-flow holes are arranged in the first valve body and the second valve body; the synchronous driving mechanism is used for driving the first valve core and the second valve core to synchronously rotate; when the first valve core or the second valve core is opened to any angle, the sum of the flow areas of the first valve core and the second valve core remains constant.

[0012] Preferably, the installation angle of the first valve core in the first valve body is different from the installation angle of the second valve core in the second valve body by 90°; sealing members are arranged in the first valve body and the second valve body at positions of the front and rear through-flow holes; when the flow channel of the first valve core is completely exposed at the through-flow hole of the first valve body, the flow channel of the second valve core is closed by the sealing member and the side wall of the second valve body.

[0013] Preferably, the through-flow hole is of a rectangular structure, the flow channel of the first valve core and the second valve core is of an equilateral triangle structure, the height of the through-flow hole is the same as the length of the side of the cross section of the flow channel, and the width of the through-flow hole is the same as the length of the perpendicular bisector of the cross section of the flow channel.

[0014] Preferably, the first valve body and the second valve body are provided with protruding plug-in parts, plug-in holes are arranged in the two plug-in parts, the synchronous driving mechanism comprises a driving assembly and a following driving assembly, the driving assembly is arranged on the plug-in part of the first valve body and connected with the first valve core through the plug-in hole, the following driving assembly is arranged on the plug-in part of the second valve body and connected with the second valve core through the plug-in hole, and the driving assembly and the following driving assembly are connected through a synchronous belt.

[0015] Preferably, the active drive assembly comprises a servo deceleration motor, an output wheel, a support frame, a first output shaft and a first fixing member, the support frame is a rectangular structure, the support frame is arranged on the plug-in part of the first valve body, a set of let-out holes are coaxially arranged on the upper and lower end faces of the support frame, and the side of the support frame facing the second valve body is a hollow structure; the servo deceleration motor is arranged on the upper end face of the support frame; the output wheel is arranged in the support frame, the first output shaft is connected with the servo deceleration motor, the first output shaft is connected with the first valve core after penetrating through the output wheel, the first valve core is provided with a first insertion slot, the first insertion slot is plug-in matched with the end of the first output shaft, and the first insertion slot limits the end of the first output shaft; the fixing member is arranged in the support frame and located at the let-out hole position of the lower end of the support frame, the first fixing member is connected with the plug-in part of the first valve body, the first fixing member is sleeved on the first output shaft and axially limits the first output shaft, the synchronous belt is sleeved on the output wheel, and the first output shaft limits the output wheel so that the output wheel rotates with the first output shaft.

[0016] Preferably, the follow-up drive assembly comprises a follow-up wheel, a second output shaft and a second fixing member, the second output shaft is connected with the second valve core after penetrating through the follow-up wheel, the second valve core is provided with a second insertion slot, the second insertion slot is plug-in matched with the end of the second output shaft, and the second insertion slot limits the end of the second output shaft; the second output shaft limits the follow-up wheel so that the follow-up wheel rotates with the second output shaft; the second fixing member is connected with the plug-in part of the second valve body, the second fixing member is sleeved on the second output shaft and axially limits the second output shaft, the synchronous belt connects the output wheel and the follow-up wheel, and the output wheel and the follow-up wheel have the same diameter.

[0017] Preferably, a protective cover is arranged between the plug-in part of the first valve body and the support frame, and the protective cover is connected with the side face of the support frame.

[0018] Preferably, butt flanges are arranged on the first flow valve, the second flow valve and the first outlet and the second outlet of the liquid inlet pipeline, and the first flow valve and the second flow valve are connected with the liquid inlet pipeline through the butt flanges.

[0019] Preferably, mounting flanges are arranged at the liquid inlet of the liquid inlet pipeline and the flow-through hole positions at the ends of the first valve body and the second valve body.

[0020] Preferably, a first mounting frame is arranged at the bottom of the liquid inlet pipeline, second mounting frames are arranged at the bottoms of the first valve body and the second valve body, the second mounting frames connect the first flow valve and the second flow valve, and the bottom of the first mounting frame and the bottom of the second mounting frame are in the same plane.

[0021] Compared with the prior art, the present application has the following advantages and beneficial effects: 1) In the present application, the flow area of the inlet pipe connected to the pump source remains unchanged, and the flow area of the first valve core and the second valve core can be periodically adjusted in size, so that the sum of the flow area of the first valve core and the second valve core remains unchanged, thereby forming a pulsating cleaning effect in the flushing pipeline; further, the pulsating cleaning flow area and the return tank flow area always remain linearly increasing and linearly decreasing, and the increasing amount and the decreasing area are completely consistent, the flow area at the inlet port remains unchanged regardless of the end pulsation, and there is no pressure impact at the inlet port during the pulsation switching process; without configuring a large flow pump, using an outlet shunt mode, the cleaning device inlet does not need to overflow, there is no overflow loss, the oil return adopts a low-pressure return mode, the heating is small, the energy-saving effect is obvious, and the energy cost can be significantly saved during long-term use.

[0022] 2) In the present application, the design of "double-valve coordinated pulsation" can realize low-pressure protection and stable pulsation impact, adapt to the precision requirements of aviation equipment, and realize the output of pulsating fluid under low-pressure conditions through the synchronous adjustment of the first flow valve (pulsation valve) and the second flow valve (bypass valve), without relying on a high-pressure pump to improve the impurity stripping efficiency through pulse impact force, completely avoiding the damage risk of traditional high-pressure cleaning devices to the precision inner wall of aviation equipment, especially suitable for cleaning of light-weight material parts such as aluminum alloy, titanium alloy, and thin-walled pipelines, valve cores, and other precision structures; the first valve core and the second valve core are driven to rotate synchronously by a synchronous driving mechanism, and the initial installation angles of the two valve cores differ by 90°, when the flow passage of the first valve core is completely exposed, the flow passage of the second valve core is completely closed, and the discharge amounts of the two valve cores change "complementarily" during rotation, ensuring smooth transition of the pulsation impact pressure without instantaneous pressure rise and fall, which not only ensures the impurity stripping effect, but also improves the safety and stability of the cleaning process.

[0023] 3) In the present application, the sum of the flow areas of the first valve core and the second valve core remains constant when they are opened to any angle through precise structure matching, which fundamentally solves the problem of pressure and flow impact at the inlet of traditional pulsation devices; by keeping the flow area of the inlet port constant during the cleaning process, the flow pulsation change at the flow holes at the ends of the first valve body and the second valve body will not cause pressure and flow impact in the inlet pipe section; therefore, it can adapt to the needs of different cleaning stages, and the pulsation frequency can be flexibly controlled by adjusting the rotation speed of the valve core without changing the total flow, which takes into account the needs of rough cleaning (high-frequency pulsation) and fine cleaning (low-frequency pulsation), and has stronger versatility.

[0024] 4) In the present application, high synchronism drive is adopted, and the synchronous drive mechanism is composed of "driving assembly, driven assembly and synchronous belt. The driving wheel and the driven wheel have the same diameter, and the synchronous belt transmission ensures that the rotation speed of the first valve core and the second valve core is completely consistent. At the same time, the valve core and the output shaft are limited and matched through the insertion slot to avoid the relative sliding of the shaft and the valve core, further guarantee the rotation synchronism, and ensure the synchronization of the bypass valve and the pulse valve.

[0025] 5) In the present application, the front and rear flow holes of the first valve body and the second valve body are provided with polytetrafluoroethylene sealing pieces. The side close to the valve core adopts a curved surface structure and completely matches the spherical valve core, realizing "zero leakage" sealing effect. The polytetrafluoroethylene material has excellent wear resistance and corrosion resistance, can withstand long-term valve core rotation friction, avoids pressure loss or fluid leakage caused by sealing failure, prolongs the service life of the device, and prevents leakage fluid from polluting the equipment or environment.

[0026] 6) In the present application, the device is provided with a first mounting frame for supporting the liquid inlet pipeline, and a second mounting frame for connecting and supporting two flow valves. The bottom of the two mounting frames is in the same plane, ensuring that the liquid inlet pipeline, flow valve and other components have no obvious vibration under the impact of pulsating fluid, reducing component wear and improving overall structural stability. At the same time, the mounting frame is adapted to various working platforms and can be directly fixed on a cleaning station or a movable support to meet different scene use requirements. In addition, the liquid inlet of the liquid inlet pipeline and the end flow hole of the two flow valves are provided with mounting flanges, and the liquid inlet pipeline and the flow valve are connected through the butt flanges. The flange connection not only improves the sealing reliability, but also can quickly adapt to different types of aviation equipment interfaces, such as engine pipelines and hydraulic system interfaces, without the need for additional modification, significantly improving the versatility of the device. In addition, the valve body adopts a split structure, the middle part is butt jointed and fixed by bolts, which is convenient for disassembly and replacement of the valve core, sealing piece and other vulnerable parts, reduces the maintenance cost and difficulty, and makes the device not only can be used as a finished product on newly developed equipment, but also can be added to the outlet position of the existing traditional cleaning device, which realizes the low inlet pressure impact modification of the existing cleaning device. BRIEF DESCRIPTION OF DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0028] Figure 1 It is a schematic diagram of the assembly structure of the pulsating cleaning device in the present application.

[0029] Figure 2The first valve body and the second valve body internal structure schematic diagram in the application.

[0030] Figure 3 The first valve core structure schematic diagram in the application.

[0031] Figure 4 The synchronous drive mechanism structure schematic diagram in the application.

[0032] Figure 5 The support frame structure schematic diagram in the application.

[0033] Figure 6 The active drive assembly and the follow-up drive assembly structure schematic diagram in the application.

[0034] Figure 7 The first valve core and the second valve core flow area change sine wave curve in the application.

[0035] Figure 8 The first valve core and the second valve core flow area change square wave curve in the application.

[0036] Figure 9 The first valve core and the second valve core flow area change sawtooth wave curve in the application.

[0037] Wherein: 1 - liquid inlet pipeline, 2 - first valve body, 21 - first valve core, 211 - first slot, 3 - second valve core, 311 - second slot, 4 - sealing element, 5 - active drive assembly, 51 - servo reduction motor, 52 - support frame, 53 - output wheel, 54 - first output shaft, 55 - first fixed element, 6 - follow-up drive assembly, 61 - follow-up wheel, 62 - second output shaft, 63 - second fixed element, 7 - synchronous belt, 8 - protective cover, 9 - first mounting frame, 10 - second mounting frame. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantages of the embodiments of the application more clear, the technical scheme in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application.

[0039] Embodiment 1: An inlet low-impact type pulsating cleaning device for aviation equipment, such as Figure 1 、 Figure 2 、 Figure 3 and Figure 4As shown, including liquid inlet pipeline 1, the first flow valve, the second flow valve and synchronous drive mechanism, liquid inlet pipeline 1 is provided with liquid inlet, first outlet and second outlet, liquid inlet is arranged in the middle of liquid inlet pipeline 1, first outlet and second outlet are arranged at both ends of liquid inlet pipeline 1 respectively, liquid inlet is connected with cleaning equipment pump source, for introducing the pressure flow of cleaning equipment to the pulse cleaning device to generate pulse pressure for back-end aviation equipment pipeline; The first flow valve is connected with the first outlet, the second flow valve is connected with the second outlet, the synchronous drive mechanism is located above the first flow valve and the second flow valve, and the synchronous drive mechanism is used for controlling the opening and closing of the first flow valve and the second flow valve; The first flow valve comprises a first valve body 2, a first valve core 21 is arranged in the first valve body 2, the second flow valve comprises a second valve body, a second valve core 3 is arranged in the second valve body, the first valve core 21 and the second valve core 3 are both spherical structures and have the same structure, the first valve body 2 and the second valve body have the same structure, the first valve body 2 and the second valve body are both split structure, the middle part of the first valve body 2 and the second valve body is connected and fixed by bolts; The flow channel is arranged in the first valve core 21 and the second valve core 3, the through flow hole is correspondingly arranged on the first valve body 2 and the second valve body, the synchronous drive mechanism is used for driving the first valve core 21 and the second valve core 3 to rotate synchronously, the sum of the flow areas of the first valve core 21 or the second valve core 3 remains constant when the first valve core 21 or the second valve core 3 is opened to any angle. The installation angle of the first valve core 21 in the first valve body 2 is different from the installation angle of the second valve core 3 in the second valve body by 90°; When the flow channel of the first valve core 21 is completely exposed at the flow-through hole of the first valve body 2, the flow channel of the second valve core 3 is completely closed by the sealing element 4 and the side wall of the second valve body, in the embodiment, the first flow valve and the second flow valve can be used as the main valve, that is, the pulse flow valve, in the embodiment, the first flow valve is used as the pulse flow valve, which is connected with the pipeline to be washed, the pipeline is quickly washed through the pulse effect, the second flow valve is used as the bypass flow valve, which is connected with the oil tank of the cleaning equipment, and the excess oil output by the pump source is returned to the equipment oil tank.

[0040] The flow area of the first valve core 21 and the second valve core 3 can be periodically adjusted in size, so that the sum of the flow areas of the first valve core 21 and the second valve core 3 remains constant, so that the pipeline to be washed forms a pulse cleaning effect; Further, the pulse cleaning flow area and the return oil tank flow area always maintain a linear increase and a linear decrease, the increased amount and the reduced area are completely consistent, the flow area at the liquid inlet remains constant regardless of the change of the end pulse, the inlet always maintains a constant flow area, there is no pressure impact at the liquid inlet during the pulse switching process; Without configuring a large flow pump, using the outlet shunt mode, the cleaning device inlet does not need to overflow, there is no overflow loss, the oil return adopts a low-pressure oil return mode, the heating is small, the energy-saving effect is obvious, and the long-term use can significantly save energy cost.

[0041] The liquid discharge amount of the first valve core 21 and the second valve core 3 changes complementarily during rotation, ensuring smooth transition of the pulsating impact pressure without instantaneous pressure surge or drop, thereby ensuring the impurity stripping effect and improving the safety and stability of the cleaning process.

[0042] As shown in Figure 2 The first valve body 2 and the second valve body are provided with sealing members 4 at the positions of the front and rear flow-through holes, and the first valve core 21 and the second valve core 3 abut against the sealing members 4. The sealing members 4 are provided with a curved surface structure on the side close to the first valve core 21 and the second valve core 3, so that they can be attached to the first valve core 21 or the second valve core 3, thereby ensuring the sealing performance of the first flow valve and the second flow valve. The sealing members 4 are made of polytetrafluoroethylene material, which has excellent wear resistance and corrosion resistance, can withstand long-term rotation friction of the valve core, avoids pressure loss or fluid leakage caused by sealing failure, prolongs the service life of the device, and prevents leakage of fluid from polluting the equipment or the environment.

[0043] By keeping the flow area of the inlet constant during the cleaning process, the flow pulsation change of the flow-through holes at the ends of the first valve body 2 and the second valve body will not cause pressure and flow impact on the inlet pipe section. Therefore, it can meet the needs of different cleaning stages, and the pulsation frequency can be flexibly controlled by adjusting the rotation speed of the valve core without changing the total flow. It can meet the needs of high-frequency pulsation and low-frequency pulsation.

[0044] The flow-through hole is a rectangular structure, and the flow passage cross section of the first valve core 21 and the second valve core 3 is an equilateral triangle structure. The first valve core 21 and the second valve core 3 can be horizontally rotated in the first valve body 2 and the second valve body. The height of the flow-through hole is the same as the length of the side of the flow passage cross section, and the width of the flow-through hole is the same as the length of the perpendicular bisector of the flow passage cross section. When the flow passage of the first valve core 21 is completely exposed at the flow-through hole of the first valve body 2, the left end point of the flow passage of the first valve core 21 corresponds to the left side wall of the flow-through hole of the first valve body 2, and the right side wall of the flow passage of the first valve core 21 corresponds to the right side wall of the flow-through hole of the first valve body 2. At this time, the flow passage of the first valve core 21 is completely exposed under the flow-through hole of the first valve body 2, and the pulsating flow of the first valve core 21 reaches the maximum value. At this time, the flow passage of the second valve core 3 is completely closed by the side wall of the second valve body. When the first valve core 21 rotates clockwise, the outlet area of the flow passage of the first valve core 21 decreases, and the flow passage of the corresponding second valve core 3 is exposed at the flow-through hole position of the second valve body and gradually increases. The first valve core 21 and the second valve core 3 rotate synchronously, the pulsating flow area of the pulsating flow valve can be adjusted, and the sum of the flow areas of the two is kept constant, which can protect the inlet section pipe and components of the pulsating cleaning from pressure and flow impact, avoid abnormal vibration or noise, and there is no overflow loss in the system, which can realize efficient use of energy.

[0045] The first flow valve, the second flow valve, and the first outlet and the second outlet of the liquid inlet pipeline 1 are provided with butt flanges, and the first flow valve and the second flow valve are connected with the liquid inlet pipeline 1 through the butt flanges and fixed through bolts. The liquid inlet of the liquid inlet pipeline 1 and the flow-through holes at the ends of the first valve body 2 and the second valve body are provided with mounting flanges, the liquid inlet pipeline 1 is connected with the pump source of the cleaning equipment through the mounting flange of the liquid inlet, the pulsating flow valve is connected with the pipeline to be flushed through the mounting flange, the pipeline is quickly cleaned through the pulsating effect, and the bypass flow valve is connected with the oil tank of the cleaning equipment through the mounting flange, so that the excess oil output by the pump source is returned to the oil tank of the equipment.

[0046] As shown in Figure 1 , the first mounting frame 9 is arranged at the bottom of the liquid inlet pipeline 1, and the second mounting frame 10 is arranged at the bottom of the first valve body 2 and the second valve body, and the second mounting frame 10 connects the first flow valve and the second flow valve. The bottom of the first mounting frame 9 is in the same plane as the bottom of the second mounting frame 10, and the liquid inlet pipeline 1, the first valve body 2 and the second valve body are fixed on the equipment mounting table or an external mounting frame through the two mounting frames to meet different scene use requirements. The bottoms of the two mounting frames are in the same plane, so that the liquid inlet pipeline 1, the flow valve and other components have no obvious vibration under the impact of the pulsating fluid, the wear of the components is reduced, and the overall structural stability is improved.

[0047] As shown in Figure 7 , Figure 8 and Figure 9 , it can be seen from the curves of the flow-through areas of the first valve core 21 and the second valve core 3 and the rotation angles that the discharge capacities of the two valve cores change complementarily. By adjusting the rotation angles and rotation rates of the first valve core 21 and the second valve core 3, various cleaning waveforms such as sine waves, sawtooth waves and square waves can be adjusted. Figure 7 is a sine wave curve, Figure 8 is a square wave curve, Figure 9 is a sawtooth wave curve.

[0048] Embodiment 2 On the basis of the above embodiment, the synchronous driving mechanism is further limited, as shown in Figure 4 , Figure 5 and Figure 6 , the first valve body 2 and the second valve body are provided with protruding plug-in parts, the top of each plug-in part is a plane structure, and each plug-in part is provided with a socket. The synchronous driving mechanism includes a driving assembly 5 and a following driving assembly 6. The driving assembly 5 is arranged on the plug-in part of the first valve body 2 and connected with the first valve core 21 through the socket, the following driving assembly 6 is arranged on the plug-in part of the second valve body and connected with the second valve core 3 through the socket, the driving assembly 5 and the following driving assembly 6 are connected through a synchronous belt 7, and the driving assembly 5 can drive the following driving assembly 6 to rotate synchronously, so that the first valve core 21 and the second valve core 3 rotate synchronously.

[0049] The active driving assembly 5 comprises a servo reduction motor 51, an output wheel 53, a support frame 52, a first output shaft 54 and a first fixing member 55. The support frame 52 is in a rectangular structure, is arranged on the plug-in part of the first valve body 2 and is connected to the plug-in part through bolts. A group of clearance holes are coaxially arranged on the upper and lower end faces of the support frame 52. The side of the support frame 52 facing the first valve body 2 is in a hollow structure, which can make the synchronous belt 7 extend out to be connected to the follow-up driving assembly 6. The servo reduction motor 51 is arranged on the upper end face of the support frame 52. The servo reduction motor is used to reduce the running speed of the first valve core 21 and the second valve core 3 and improve the driving torque of the first valve core 21 and the second valve core 3. The output wheel 53 is arranged in the support frame 52. The first output shaft 54 is connected to the servo reduction motor 51. The first output shaft 54 is connected to the first valve core 21 after penetrating through the output wheel 53. The first valve core 21 is provided with a first insertion slot 211 in a rectangular curved groove structure. The first insertion slot 211 is inserted and matched with the end of the first output shaft 54. The first insertion slot 211 limits the end of the first output shaft 54. The rotation of the first output shaft 54 can drive the first valve core 21 to rotate horizontally in the first valve body 2. The fixing member is arranged inside the support frame 52 and located at the position of the clearance hole at the lower end of the support frame 52. The first fixing member 55 is connected to the plug-in part of the first valve body 2 through bolts. The bottom edges of both ends of the fixing member can clear the bottom of the support frame 52. The first fixing member 55 is sleeved on the first output shaft 54. The first output shaft 54 is provided with a stepped structure. The first fixing member 55 is matched with the first output shaft 54 to position the first output shaft 54, so that the first output shaft 54 will not shake during rotation. The synchronous belt 7 is sleeved on the output wheel 53. The first output shaft 54 is provided with a first annular groove above and below the output wheel 53. The first annular groove is provided with a first elastic retainer ring. The two first elastic retainer rings are sleeved on the first output shaft 54 to axially limit the output wheel 53. The output wheel 53 is provided with a positioning screw hole. After the position of the first valve core 21 is determined, the relationship between the output wheel 53 and the synchronous belt 7 is adjusted. The output wheel 53 is fixed on the first output shaft 54 by screwing a positioning jack into the side of the output wheel 53, so that the output wheel 53 rotates with the first output shaft 54.

[0050] The follow-up driving assembly 6 comprises a follow-up wheel 61, a second output shaft 62 and a second fixing part 63, the output wheel 53 and the follow-up wheel 61 are of the same diameter, the second output shaft 62 is connected with the second spool 3 after penetrating through the follow-up wheel 61, the second spool 3 is provided with a second slot 311, the second slot 311 is the same as the first slot 211, and is also a rectangular curved groove structure, the second slot 311 is inserted and matched with the end of the second output shaft 62, and the second slot 311 limits the end of the second output shaft 62; the second output shaft 62 limits the follow-up wheel 61 to rotate with the second output shaft 62, the second output shaft 62 is provided with two second annular grooves at intervals, the two second annular grooves are respectively provided with second elastic retaining rings, the two second elastic retaining rings limit the axis of the follow-up wheel 61, and the side surface of the follow-up wheel 61 is also provided with a positioning screw hole, which has the same connection mode as the connection direction of the first output shaft 54 and the output wheel 53, and details are not repeated here; the second fixing part 63 is connected with the insertion part of the second valve body through bolts, the second fixing part 63 is sleeved on the second output shaft 62 and limits the second output shaft 62 in the axial direction, so that the second output shaft 62 can rotate stably, and the synchronous belt 7 connects the output wheel 53 and the follow-up wheel 61. The insertion part of the first valve body 2 and the support frame 52 are provided with a protective cover 8, the protective cover 8 is connected with the side surface of the support frame 52, the protective cover 8 is used for isolating rotating parts such as the synchronous belt 7, and preventing mechanical injury. The other parts of the embodiment are the same as those of the above-mentioned embodiment, and details are not repeated here.

[0051] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0052] In addition, the terms "horizontal", "vertical" and the like in the description of the present application do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0053] In the description of the present application, it also needs to be explained that, unless explicitly specified and limited, if the terms "set", "install", "connect", "connect" appear, they should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0054] The above is only the preferred embodiment of the present application, not any form of limitation on the present application, any simple modification, equivalent change of the above embodiment according to the technical essence of the present application falls within the protection scope of the present application.

Claims

1. A low-impact pulsed cleaning device for aviation equipment inlets, characterized in that, The device includes an inlet pipeline, a first flow valve, a second flow valve, and a synchronous drive mechanism. The inlet pipeline is provided with an inlet, a first outlet, and a second outlet. The first flow valve is connected to the first outlet, and the second flow valve is connected to the second outlet. The synchronous drive mechanism is located above the first and second flow valves and is used to control the opening and closing of the first and second flow valves. The first flow valve includes a first valve body, in which a first valve core is disposed. The second flow valve includes a second valve body, in which a second valve core is disposed. Both the first and second valve cores are spherical structures and have the same structure. The first and second valve bodies have the same structure. Both the first and second valve cores have flow channels. Both the first and second valve bodies have corresponding through-flow holes. The synchronous drive mechanism is used to drive the first and second valve cores to rotate synchronously. When the first or second valve core is opened to any angle, the sum of their flow areas remains constant.

2. The low-impact pulsating cleaning device for aviation equipment as described in claim 1, characterized in that, The installation angle of the first valve core in the first valve body differs from that of the second valve core in the second valve body by 90°; both the first and second valve bodies are provided with sealing elements at the front and rear flow holes; when the flow channel of the first valve core is fully exposed at the flow hole of the first valve body, the flow channel of the second valve core is sealed by the sealing element and side wall of the second valve body.

3. The low-impact pulsating cleaning device for aviation equipment as described in claim 2, characterized in that, The flow hole has a rectangular structure, and the flow channel cross-section of the first valve core and the second valve core has an equilateral triangular structure. The height of the flow hole is the same as the side length of the flow channel cross-section, and the width of the flow hole is the same as the length of the perpendicular bisector of the flow channel cross-section.

4. The inlet low-impact pulsating cleaning device for aviation equipment as described in claim 2, characterized in that, Both the first valve body and the second valve body have protruding insertion portions, and each of the two insertion portions is provided with a socket. The synchronous drive mechanism includes an active drive component and a follower drive component. The active drive component is disposed on the insertion portion of the first valve body and connected to the first valve core through the socket. The follower drive component is disposed on the insertion portion of the second valve body and connected to the second valve core through the socket. The active drive component and the follower drive component are connected by a synchronous belt.

5. The low-impact pulsating cleaning device for aviation equipment as described in claim 4, characterized in that, The active drive assembly includes a servo geared motor, an output wheel, a support frame, a first output shaft, and a first fixing member. The support frame is a rectangular structure and is mounted on the insertion part of the first valve body. A set of clearance holes are coaxially arranged on the upper and lower end faces of the support frame. The side of the support frame facing the second valve body has a hollow structure. The servo geared motor is mounted on the upper end face of the support frame. The output wheel is mounted within the support frame. The first output shaft is connected to the servo geared motor, passes through the output wheel, and connects to the first valve core. The first valve core has a first slot that engages with the end of the first output shaft, limiting the position of the end of the first output shaft. The fixing member is located inside the support frame at the clearance hole position at the lower end of the support frame. The first fixing member is connected to the insertion part of the first valve body and is sleeved on the first output shaft, axially limiting its movement. The synchronous belt is sleeved on the output wheel. The first output shaft limits the output wheel, causing it to rotate with the first output shaft.

6. The inlet low-impact pulsating cleaning device for aviation equipment as described in claim 5, characterized in that, The follower drive assembly includes a follower wheel, a second output shaft, and a second fixing member. The second output shaft passes through the follower wheel and connects to a second valve core. The second valve core has a second slot, which is inserted into the end of the second output shaft, limiting the end of the second output shaft. The second output shaft limits the follower wheel, causing it to rotate with the second output shaft. The second fixing member is connected to the insertion part of the second valve body and is sleeved on the second output shaft, axially limiting it. The synchronous belt connects the output wheel and the follower wheel, and the output wheel and the follower wheel have the same diameter.

7. The inlet low-impact pulsating cleaning device for aviation equipment as described in claim 6, characterized in that, A protective cover is provided between the insertion part of the first valve body and the support frame, and the protective cover is connected to the side of the support frame.

8. The inlet low-impact pulsating cleaning device for aviation equipment as described in claim 1, characterized in that, The first flow valve, the second flow valve, and the first and second outlets of the liquid inlet pipeline are all equipped with docking flanges, and the first flow valve and the second flow valve are respectively connected to the liquid inlet pipeline through docking flanges.

9. The inlet low-impact pulsating cleaning device for aviation equipment as described in claim 1, characterized in that, Mounting flanges are provided at the inlet of the liquid inlet pipeline and at the flow holes at the ends of the first and second valve bodies.

10. The inlet low-impact pulsating cleaning device for aviation equipment as described in claim 1, characterized in that, A first mounting bracket is provided at the bottom of the liquid inlet pipeline, and a second mounting bracket is provided at the bottom of the first valve body and the second valve body. The second mounting bracket connects the first flow valve and the second flow valve, and the bottom of the first mounting bracket and the bottom of the second mounting bracket are on the same plane.

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