A diaphragm type air pressure energy converter based on piezoelectric-friction electricity composite

Abstract

A kind of diaphragm type air pressure energy converter based on piezoelectric-friction electricity compound belongs to energy collection field.Diaphragm cylinder is installed on converter base, and two rotation speed increasing modules are symmetrically installed on the inner side of left and right baffles of converter base;The middle lower end of swing bar assembly is detachably fixedly connected with the telescopic rod of diaphragm cylinder, the left and right ends of swing bar assembly middle are connected with the left and right baffles of converter base, and PVDF piezoelectric unit is fixedly installed on swing bar assembly;Two friction power generation units are symmetrically fixedly installed on the outer side of left and right baffles of converter base, and friction power generation unit is detachably fixedly connected with rotation speed increasing module through flange coupling.The air pressure energy converter of the application can efficiently convert pressure energy in pneumatic system into electric energy under small gas consumption, simultaneously capture piezoelectric energy and friction electric energy of air pressure energy converter, improve overall electric energy output of air pressure energy converter, and solve the energy supply problem of low-power wireless nodes in pneumatic system.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of energy collection, and particularly relates to a diaphragm type air pressure energy converter based on piezoelectric-friction composite. BACKGROUND

[0002] With the rapid development of wireless communication technology, information technology has also been significantly improved, which greatly promotes the wide application of wireless sensor networks in the field of aerodynamics. However, in the actual engineering application scene, wireless sensor networks still face some technical challenges. In particular, the problem of energy supply in the system is still in the research stage. Therefore, it is imminent to explore how to efficiently collect various energies in the environment of low-power components and devices, and to develop micro-energy devices with small size, high energy density and sustainable power supply to cope with the wiring complexity, poor mobility and limited life of traditional wired cable power supply.

[0003] Many new technologies are emerging to collect the dispersed mechanical energy around the environment as a sustainable self-sufficient energy. Among these technologies, piezoelectric nanogenerators and friction nanogenerators have been widely researched and developed due to their high energy conversion efficiency, strong low-frequency adaptability and easy integration, and have been used for wind power, wave power, vibration power and other energy collection and utilization. The piezoelectric nanogenerator utilizes the positive piezoelectric effect of piezoelectric materials to convert the internal stress of piezoelectric materials into electric charge transmission, which is suitable for vibration energy collection. The friction nanogenerator is based on Maxwell displacement current, which converts mechanical energy into electrical energy through the coupling effect of contact electrification and electrostatic induction.

[0004] Although there are the above advantages, the electric energy collected by a single energy conversion method is still very low and cannot meet the needs of many applications. Composite power generation of multiple power generation principles is a good choice, but the composite power generator is usually large in space volume, difficult to miniaturize, and inconvenient to use in array. In addition, after the power generator is connected to the aerodynamic system, it cannot affect the normal operation of the aerodynamic system, therefore, the gas consumption of the power generator should be minimized, and the flow field space and the volume of the power generator cavity should not be too large. SUMMARY

[0005] The present application aims to solve the problems of insufficient power supply of single energy harvester, large space volume of composite energy harvester and inconvenience of array use, and large gas consumption of traditional air pressure energy converter, and provides a diaphragm type air pressure energy converter based on piezoelectric-friction composite.

[0006] The air pressure energy converter of the present application can efficiently convert the pressure energy in the aerodynamic system into electrical energy under small gas consumption, and solve the energy supply problem of low-power wireless nodes in the aerodynamic system.

[0007] To achieve the above object, the technical scheme adopted by the present application is:

[0008] A diaphragm type air pressure energy converter based on piezoelectric-friction electricity composite, comprising a converter base, a diaphragm air cylinder, a flange coupling, a swing rod assembly, a PVDF piezoelectric unit, two rotation speed increasing modules and two friction power generation units.

[0009] The diaphragm air cylinder is detachably fixedly installed on the converter base, the two rotation speed increasing modules are symmetrically arranged relative to the center of the converter base and installed on the inner sides of the left and right baffles of the converter base, the middle lower end of the swing rod assembly is detachably fixedly connected with the telescopic rod of the diaphragm air cylinder, the left and right ends of the middle part of the swing rod assembly are rotationally connected with the left and right baffles of the converter base, the PVDF piezoelectric unit is fixedly installed on the swing rod assembly, and the two friction power generation units are symmetrically fixedly installed on the outer sides of the left and right baffles of the converter base, and the friction power generation units are detachably fixedly connected with the rotation speed increasing modules through the flange coupling.

[0010] Further, the converter base 1 comprises an air cylinder mounting seat, a base, a bearing I, a bearing II and a bearing III.

[0011] The air cylinder mounting seat is composed of two side plates and a top plate fixedly connected with the upper ends of the two side plates, a through hole I is arranged at the center position of the top plate of the air cylinder mounting seat, and the diaphragm air cylinder is fixedly connected with the converter base; the base is composed of a seat plate and left and right baffles fixedly arranged on the left and right sides of the seat plate, the left and right baffles are symmetrically provided with bearing mounting holes I, U-shaped sliding grooves I, bearing mounting holes II and bearing mounting holes III on the upper sides, and the U-shaped sliding grooves I are arranged in the front-rear direction; the air cylinder mounting seat is installed on the base, and the two side plates of the air cylinder mounting seat are detachably fixedly connected with the front and rear sides of the seat plate of the base; and the bearing I, the bearing II and the bearing III are respectively installed in the bearing mounting hole I, the bearing mounting hole II and the bearing mounting hole III of the base.

[0012] Further, the diaphragm air cylinder comprises an air cylinder base, a disc-shaped diaphragm, an air cylinder end cover, a return spring and a telescopic rod.

[0013] The bottom middle position of the cylinder base is provided with an air inlet hole, and the top middle position of the cylinder base is provided with a diaphragm mounting cavity; the disc-shaped diaphragm is mounted on the cylinder base through the diaphragm mounting cavity; the middle part of the cylinder end cover is provided with a center column, the center of the center column is provided with a limiting hole, and the lower end of the center column is arranged as a limiting boss in the inner cavity of the cylinder end cover; the upper end of the center column is arranged as a connecting end and protrudes from the top surface of the cylinder end cover, the outer wall of the connecting end is provided with external threads, the connecting end passes through the through hole I on the cylinder mounting base, and the diaphragm cylinder is mounted on the converter base through the locking nut, and the top of the cylinder end cover is provided with an exhaust hole; the middle position of the rod end of the telescopic rod is provided with a threaded hole in the axial direction; the reset spring is sleeved outside the telescopic rod, one end of the reset spring is fixed to the head of the telescopic rod, the other end is fixed to the limiting boss of the cylinder end cover, the rod end of the telescopic rod is slidingly arranged in the limiting hole of the cylinder end cover, and the head end of the telescopic rod is arranged on the disc-shaped diaphragm; the cylinder end cover, the disc-shaped diaphragm and the cylinder base are detachably fixedly connected.

[0014] Further, each of the rotation speed increasing modules comprises a gear mounting plate, a bearing IV, a bearing V, a bearing VI, a double gear I, a double gear II, a double gear III and a single gear;

[0015] The gear mounting plate is provided with a bearing mounting hole IV, a U-shaped sliding groove II, a bearing mounting hole V and a bearing mounting hole VI; the bearing mounting hole IV, the U-shaped sliding groove II, the bearing mounting hole V and the bearing mounting hole VI are all arranged on the inner side of the gear mounting plate and correspond to the bearing mounting hole I, the U-shaped sliding groove I, the bearing mounting hole II and the bearing mounting hole III on the base one by one; the bearing IV, the bearing V and the bearing VI are respectively arranged in the bearing mounting hole IV, the bearing mounting hole V and the bearing mounting hole VI on the gear mounting plate;

[0016] The double gear I is composed of a double gear I center shaft, a double gear I large gear and a double gear I small gear fixedly arranged on the double gear I center shaft; the double gear I center shaft is provided with a double gear I shaft shoulder on both sides of the double gear I large gear and the double gear I small gear, and the small gear end and the large gear end of the double gear I center shaft are respectively arranged on the bearing IV and the bearing I and are limited by the double gear I shaft shoulder;

[0017] The double gear II is composed of a double gear II center shaft, a double gear II small gear and a double gear II large gear fixedly arranged on the double gear II center shaft; the double gear II center shaft is provided with a double gear II shaft shoulder on both sides of the double gear II small gear and the double gear II large gear, and the small gear end and the large gear end of the double gear II center shaft are slidingly arranged in the U-shaped sliding groove I and the U-shaped sliding groove II and are limited by the double gear II shaft shoulder;

[0018] The double gear III is composed of a double gear III center shaft and a double gear III pinion and a double gear III gear fixedly installed on the double gear III center shaft; the double gear III center shaft is provided with double gear III shaft shoulders on both sides of the double gear III pinion and the double gear III gear, and the pinion end and the gear end of the double gear III center shaft are respectively installed on the bearing V and the bearing II and are limited by the double gear III shaft shoulders;

[0019] The single gear is composed of a single gear center shaft and a rotating gear fixedly installed on the single gear center shaft; the single gear center shaft is provided with single gear shaft shoulders on both sides of the single gear, and the single gear center shaft is installed on the bearing VI and the bearing III at a distance from the shorter end and the longer end of the single gear and is limited by the single gear shaft shoulders;

[0020] The double gear I is meshed with the double gear II pinion through the double gear I gear, so as to drive the double gear II to rotate and realize two-stage speed increase; the double gear II is meshed with the double gear III pinion through the double gear II gear, so as to drive the double gear III to rotate and realize three-stage speed increase; the double gear III is meshed with the rotating gear of the single gear through the double gear III gear, so as to drive the single gear to rotate and realize four-stage speed increase.

[0021] Further, the module of the double gear I gear, the double gear I pinion, the double gear II gear, the double gear II pinion, the double gear III gear, the double gear III pinion and the rotating gear is respectively m1, m2, m3, m4, m5, m6 and m7, the number of teeth is respectively n1, n2, n3, n4, n5, n6 and n7, the module relationship is m1=m2=m3=m4=m5=m6=m7, and the number of teeth relationship is n1>n2, n3>n4, n5>n6, n1+n4>n2+n3, n3+n6>n4+n5 and n5>n7.

[0022] Further, the swing rod assembly includes a moving rod, a ‘T’ shaped connecting rod and two swing rod assembly units; each swing rod assembly unit includes a fixed rod, two swing rods, N piezoelectric unit connecting rods, N rotating hinges and two connecting rods.

[0023] The two swing rods are arranged side by side, and one end of each of the two swing rods is provided with an incomplete gear, and the other end of each of the two swing rods is provided with N through holes III arranged in a 'I' shape along the length direction, for mounting a plurality of PVDF piezoelectric units, and N≥2; a threaded hole is arranged on the outer wall of the lower rod of the 'T' shaped connecting rod, and a through hole IV is arranged in the horizontal rod of the 'T' shaped connecting rod; one end of the rotating hinge is provided with a hinge mounting hole, and the two swing rods are arranged side by side and the one end is rotatably arranged on the fixed rod; the incomplete gear of the swing rod is engaged with the pinion of the double gear I, so as to drive the double gear I to rotate and realize the first speed increase.

[0024] One end of each of the two connecting rods is rotatably connected with the corresponding swing rod, and the other end of each of the two connecting rods is rotatably arranged on the two ends of the moving rod; the 'T' shaped connecting rod is sleeved on the middle position of the moving rod; the lower rod of the 'T' shaped connecting rod is threadedly connected with the threaded hole of the telescopic rod; the N piezoelectric unit connecting rods pass through the hinge mounting holes of the corresponding rotating hinges, and the other end of each of the two swing rods is rotatably connected with the two ends of the N piezoelectric unit connecting rods; the swing rod assembly is rotatably arranged in the through hole II arranged on the left and right baffles of the converter base through the fixed rod.

[0025] Further, the PVDF piezoelectric unit is mounted on the rotating hinge of the swing rod assembly.

[0026] Further, each of the friction power generation units comprises a stator I, a interdigital electrode, a stator II, a friction material I, a rotor I, a friction material II, a rotor II and a bearing VII;

[0027] The rotor I, the stator II, the rotor II and the stator I are coaxially arranged in sequence; a bearing mounting hole VII is arranged at the center position of the stator I; the bearing VII is mounted on the stator I through the bearing mounting hole VII; the interdigital electrode is adhered on the inner side of the stator I and the inner and outer sides of the stator II through glue respectively; the interdigital electrode comprises an electrode I and an electrode II; the electrode I and the electrode II are annular grid electrodes, and the areas of the electrode I and the electrode II are complementary;

[0028] A shaft hole is arranged at the center position of the stator I, the stator I and the stator II are coaxial and detachably fixedly connected at the outer periphery, and the stator I and the stator II are mounted on the base; the friction material I is adhered on the interdigital electrode through glue and completely covers the interdigital electrode; the rotor I is fixedly connected with the single gear shaft through a flange coupling, the structure and assembly mode of the rotor II are the same as those of the rotor I, and the rotor II rotates synchronously with the rotor I; the friction material II is provided with a plurality of sector surfaces and is uniformly distributed in a circle, the shape, area and circular distribution number of the sector surfaces correspond to the electrode I and the electrode II, and the friction material II is adhered on the inner side of the rotor I and the inner and outer sides of the rotor II through glue respectively.

[0029] Further, the friction material I is a ring-shaped electronegative material, and the friction material I is polytetrafluoroethylene, polydimethylsiloxane, polyvinyl chloride or polyimide.

[0030] Further, the friction material II is an electropositive material, and the friction material II is aluminum, copper, gold or silver; or nylon, rabbit hair or hard rubber.

[0031] The beneficial effects of the present application relative to the prior art are:

[0032] 1. The air pressure energy converter can utilize the pressure energy in the pneumatic system to realize linkage of the PVDF piezoelectric unit and the friction power generation unit, and capture the piezoelectric energy and the friction electric energy of the air pressure energy converter, thereby improving the overall electric energy output of the air pressure energy converter.

[0033] 2. The rotation speed increasing module can increase the rotation speed of the friction power generation unit, thereby significantly improving the electric energy output of the friction power generation unit.

[0034] 3. The air pressure energy converter has a small and compact structure, and is suitable for increasing the number of PVDF piezoelectric units and friction power generation units for array and integration to further improve the electric energy.

[0035] 4. The diaphragm cylinder has a simple structure, and the gas entering the air pressure energy converter pushes the disc-shaped diaphragm to deform, and the inlet cavity and the exhaust cavity are directly separated by the disc-shaped diaphragm, so that the cavity is smaller and the sealing is better, and the air consumption of the air pressure energy converter is smaller.

[0036] 5. The air pressure energy converter can efficiently convert the pressure energy in the pneumatic system into electric energy under small air consumption, capture the piezoelectric energy and the friction electric energy of the air pressure energy converter, improve the overall electric energy output of the air pressure energy converter, and solve the energy supply problem of low-power wireless nodes in the pneumatic system. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 It is a whole structure front view of a diaphragm type air pressure energy converter based on piezoelectric-friction electric composite of the present application.

[0038] Figure 2 It is a whole structure schematic diagram of a diaphragm type air pressure energy converter based on piezoelectric-friction electric composite of the present application.

[0039] Figure 3 It is a base structure schematic diagram.

[0040] Figure 4 It is a cylinder mounting seat structure schematic diagram.

[0041] Figure 5Base structure schematic diagram;

[0042] Figure 6 Diaphragm cylinder structure schematic diagram;

[0043] Figure 7 Cylinder base front view;

[0044] Figure 8 A-A sectional view of Figure 7 ;

[0045] Figure 9 Cylinder base structure schematic diagram;

[0046] Figure 10 Disc diaphragm structure schematic diagram;

[0047] Figure 11 Cylinder end cover front view;

[0048] Figure 12 B-B sectional view of Figure 11 ;

[0049] Figure 13 Cylinder end cover structure schematic diagram;

[0050] Figure 14 Telescopic rod structure schematic diagram;

[0051] Figure 15 Rotary speed-up module structure schematic Figure 1 ;

[0052] Figure 16 Rotary speed-up module front view;

[0053] Figure 17 Rotary speed-up module structure schematic Figure 2 ;

[0054] Figure 18 Gear mounting plate front view structure schematic diagram;

[0055] Figure 19 Gear mounting plate rear view structure schematic diagram;

[0056] Figure 20 Double gear I front view;

[0057] Figure 21 Double gear II front view;

[0058] Figure 22 Double gear III front view;

[0059] Figure 23 Single gear front view;

[0060] Figure 24 Figure 1 is a schematic diagram of a swing bar assembly structure;

[0061] Figure 25 Figure 2 is a front view of a swing bar;

[0062] Figure 26 Figure 3 is a schematic diagram of a swing bar structure;

[0063] Figure 27 Figure 4 is a front view of a fixed bar;

[0064] Figure 28 Figure 5 is a schematic diagram of a fixed bar structure;

[0065] Figure 29 Figure 6 is a schematic diagram of a moving bar structure;

[0066] Figure 30 Figure 7 is a schematic diagram of a 'T' shaped connecting bar structure;

[0067] Figure 31 Figure 8 is a schematic diagram of a rotating hinge structure;

[0068] Figure 32 Figure 9 is a schematic diagram of a connecting rod structure;

[0069] Figure 33 Figure 10 is a schematic diagram of a PVDF piezoelectric unit structure;

[0070] Figure 34 Figure 11 is a schematic diagram of a friction power unit assembly structure;

[0071] Figure 35 Figure 12 is a schematic diagram of a stator I structure;

[0072] Figure 36 Figure 13 is a schematic diagram of an interdigital electrode structure;

[0073] Figure 37 Figure 14 is a schematic diagram of a stator II structure;

[0074] Figure 38 Figure 15 is a schematic diagram of a rotor I structure Figure 1 ;

[0075] Figure 39 Figure 16 is a schematic diagram of a rotor II structure Figure 2 ;

[0076] Figure 40 Figure 17 is a schematic diagram of a friction material II structure;

[0077] Figure 41 Figure 18 is a schematic diagram of the working principle of a diaphragm type gas pressure energy converter based on piezoelectric-friction electricity composite according to the present application.

[0078] The component names and reference numerals involved in the above-mentioned drawings are as follows:

[0079] Converter base 1, cylinder mounting seat 1-1, bolt countersunk hole I1-1-1, through hole I1-1-2, flat head bolt 1-2, base 1-3, threaded hole I1-3-1, bolt countersunk hole II1-3-2, threaded hole II1-3-3, through hole II1-3-4, bearing mounting hole I1-3-5, U-shaped sliding groove I1-3-6, bearing mounting hole II1-3-7, bearing mounting hole III1-3-8, bearing I1-4, bearing II1-5, bearing III1-6, lock nut 2, diaphragm cylinder 3, cylinder base 3-1, air inlet hole 3-1-1, fastening bolt countersunk hole 3-1-2, diaphragm mounting cavity 3-1-3, fastening bolt assembly 3-2, disc-shaped diaphragm 3-3, diaphragm mounting hole 3-3-1, cylinder end cover 3-4, end cover mounting hole 3-4-1, limiting hole 3-4-2, limiting boss 3-4-3, exhaust hole 3-4-4, connecting end 3-4-5, return spring 3-5, telescopic rod 3-6, threaded hole 3-6-1, single-end hexagonal stud 4, snap spring 5, flange coupling 6, hexagonal stud assembly 7, rotation speed increasing module 8, gear mounting plate 8-1, bearing mounting hole IV 8-1-1, U-shaped sliding groove II 8-1-2, bearing mounting hole V 8-1-3, bearing mounting hole VI 8-1-4, bolt countersunk hole III 8-1-5, bearing IV 8-2, bearing V 8-3, bearing VI 8-4, double gear I 8-5, double gear I large gear 8-5-1, double gear I shaft shoulder 8-5-2, double gear I pinion 8-5-3, double gear II 8-6, double gear II pinion 8-6-1, double gear II shaft shoulder 8-6-2, double gear II large gear 8-6-3, double gear III 8-7, double gear III large gear 8-7-1, double gear III shaft shoulder 8-7-2, double gear III pinion 8-7-3, single gear 8-8, rotation gear 8-8-1, single gear shaft shoulder 8-8-2, swing rod assembly 9, swing rod 9-1, fixed rod connecting hole 9-1-1, connecting rod connecting hole 9-1-2, through hole III 9-1-3, incomplete gear 9-1-4, fixed rod 9-2, snap spring groove I 9-2-1, snap spring groove II 9-2-2, snap spring groove III 9-2-3, pin with snap spring groove 9-3, moving rod 9-4, snap spring groove V 9-4-1, piezoelectric unit connecting rod 9-5, 'T' shaped connecting rod 9-6, lower rod 9-6-1, through hole IV 9-6-2, rotation hinge 9-7, hinge mounting hole 9-7-1, through hole V 9-7-2, connecting rod 9-8, through hole VI 9-8-1, through hole VII 9-8-2, PVDF piezoelectric unit 10, piezoelectric unit mounting hole 10-1, bolt assembly 11, friction power generation unit 12, stator I 12-1, stator I mounting hole 12-1-1, bearing mounting hole VII 12-1-2, interdigital electrode 12-2, electrode I 12-2-1, electrode II 12-2-2, stator II 12-3,Stator II mounting hole 12-3-1, friction material I 12-4, rotor I 12-5, rotor I mounting hole 12-5-1, circular groove 12-5-2, friction material II 12-6, sector 12-6-1, rotor II 12-7, bearing VII 12-8. DETAILED DESCRIPTION

[0080] DETAILED DESCRIPTION Figure 1 , Figure 2 and Figure 14 The embodiment discloses a diaphragm type air pressure energy converter based on piezoelectric-friction electricity composite, which comprises a converter base 1, a diaphragm air cylinder 3, a flange coupling 6, a swing bar assembly 9, a PVDF piezoelectric unit 10, two rotation speed increasing modules 8 and two friction power generation units 12.

[0081] The diaphragm air cylinder 3 is detachably fixedly installed on the converter base 1, the two rotation speed increasing modules 8 are symmetrically arranged with respect to the center of the converter base 1 and are installed on the inner sides of the left and right baffles of the converter base 1 through hexagonal stud assemblies 7 respectively, the middle lower end of the swing bar assembly 9 is detachably fixedly connected with the telescopic rod 3-6 of the diaphragm air cylinder 3 through screw threads, the left and right ends of the middle part of the swing bar assembly 9 are rotationally connected with the left and right baffles of the converter base 1, the left and right ends of the middle part of the swing bar assembly 9 are respectively limited through clasp springs 5, the PVDF piezoelectric unit 10 is fixedly installed on the swing bar assembly 9 through a bolt assembly 11, the two friction power generation units 12 are symmetrically fixedly installed on the outer sides of the left and right baffles of the converter base 1 through single-head hexagonal studs 4 respectively, and the friction power generation units 12 are detachably fixedly connected with the rotation speed increasing modules 8 through the flange coupling 6 and the bolt assembly 11.

[0082] Further, as shown in Figures 3-5 The converter base 1 comprises an air cylinder mounting seat 1-1, a base 1-3, a bearing I 1-4, a bearing II 1-5 and a bearing III 1-6.

[0083] The cylinder mounting seat 1-1 is composed of two side plates and a top plate fixedly connected with the upper ends of the two side plates, four bolt countersunk holes I1-1-1 are symmetrically arranged on the two side plates of the cylinder mounting seat 1-1 respectively, a through hole I1-1-2 is arranged at the center position of the top plate of the cylinder mounting seat 1-1, and the through hole I1-1-2 is used for the fixed connection of the diaphragm cylinder 3 and the converter base 1; the base 1-3 is composed of a seat plate and left and right baffles fixed on the left and right sides of the seat plate, two ear seats are symmetrically arranged on the upper ends of the left and right baffles respectively, two through holes II1-3-4 are symmetrically arranged on the two ear seats, the through holes II1-3-4 are used for the installation and limiting of the swing rod assembly 9, bearing mounting holes I1-3-5, U-shaped sliding grooves I1-3-6, bearing mounting holes II1-3-7 and bearing mounting holes III1-3-8 are symmetrically arranged on the left and right baffles; the U-shaped sliding grooves I1-3-6 are arranged along the front and back directions, and are used for the installation and limiting of the rotating speed increasing module 8;

[0084] Four screw holes I1-3-1 are symmetrically arranged on the front and back sides of the seat plate of the base 1-3 respectively, the four screw holes I1-3-1 correspond to the four bolt countersunk holes I1-1-1 one by one; five bolt countersunk holes II1-3-2 are symmetrically arranged at the centers of the left and right baffles of the base 1-3 respectively, and are used for the fixing of the rotating speed increasing module 8; four screw holes II1-3-3 are symmetrically arranged on the left and right sides of the base 1-3 respectively, and are used for the installation and fixing of the friction power generation unit 12;

[0085] The cylinder mounting seat 1-1 is arranged on the base 1-3, the two side plates of the cylinder mounting seat 1-1 are detachably fixedly connected with the front and back sides of the seat plate of the base 1-3 through the bolt countersunk holes I1-1-1, the screw holes I1-3-1 and the flat head bolts 1-2; the bearings I1-4, the bearings II1-5 and the bearings III1-6 are respectively arranged in the bearing mounting holes I1-3-5, the bearing mounting holes II1-3-7 and the bearing mounting holes III1-3-8 of the base 1-3.

[0086] Further, as shown in Figure 1 、 Figures 6-14 The diaphragm cylinder 3 comprises a cylinder base 3-1, a disc-shaped diaphragm 3-3, a cylinder end cover 3-4, a reset spring 3-5 and an extension rod 3-6.

[0087] A gas inlet hole 3-1-1 is arranged at the middle position of the bottom of the cylinder base 3-1, six fastening bolt countersunk holes 3-1-2 are uniformly arranged on the top of the cylinder base 3-1 in the circumferential direction, and are used for the connection and fixing of the cylinder base 3-1, the disc-shaped diaphragm 3-3 and the cylinder end cover 3-4. The gas inlet hole 3-1-1 is a threaded connection hole, and is used for the threaded connection with a subsequent external air pipe quick connector; a diaphragm mounting cavity 3-1-3 is arranged at the middle position of the top of the cylinder base 3-1.

[0088] The disc diaphragm 3-3 is installed on the cylinder base 3-1 through the diaphragm installation cavity 3-1-3, the top periphery of the disc diaphragm 3-3 is provided with six diaphragm installation holes 3-3-1 which are uniformly distributed in the circumferential direction, the six diaphragm installation holes 3-3-1 correspond to the six fastening bolt countersunk holes 3-1-2 of the cylinder base 3-1 one by one, the disc diaphragm 3-3 serves as a kind of sealing element, and simultaneously plays the role of isolating the gas in the cylinder base 3-1 and the cylinder end cover 3-4, and can be elastically deformed to push the telescopic rod 3-6 to move along with the increase of the gas pressure; the material of the disc diaphragm 3-3 is rubber, and the rubber is fluorine rubber or neoprene;

[0089] The central part of the cylinder end cover 3-4 is provided with a center column, the center of the center column is provided with a limiting hole 3-4-2 for the circumferential limiting of the telescopic rod 3-6; the lower end of the center column is arranged as a limiting boss 3-4-3 in the inner cavity of the cylinder end cover 3-4 for the axial limiting of the reset spring 3-5 and the telescopic rod 3-6; the upper end of the center column is arranged as a connecting end 3-4-5 protruding from the top surface of the cylinder end cover 3-4, the outer wall of the connecting end 3-4-5 is provided with external threads, the connecting end 3-4-5 passes through the through hole 1-1-2 on the cylinder mounting seat 1-1 and installs the diaphragm cylinder 3 on the converter base 1 through the locking nut 2, the top of the cylinder end cover 3-4 is provided with an exhaust hole 3-4-4 for communication with the atmosphere; the bottom of the cylinder end cover 3-4 is provided with six end cover installation holes 3-4-1 which are uniformly distributed in the circumferential direction, the six end cover installation holes 3-4-1 correspond to the six fastening bolt countersunk holes 3-1-2 and the six diaphragm installation holes 3-3-1 one by one, for the installation and fixation of the cylinder end cover 3-4;

[0090] The telescopic rod 3-6 (in a 'T' shape structure) is provided with a threaded hole 3-6-1 in the middle position of the rod end part in the axial direction, for the connection of the diaphragm cylinder 3 and the swing rod assembly 9;

[0091] The reset spring 3-5 is sleeved outside the telescopic rod 3-6, one end of the reset spring 3-5 is fixed on the head part of the telescopic rod 3-6, the other end is fixed on the limiting boss 3-4-3 of the cylinder end cover 3-4, the rod end of the telescopic rod 3-6 is slidingly arranged in the limiting hole 3-4-2 of the cylinder end cover 3-4, the head end of the telescopic rod 3-6 is arranged on the disc diaphragm 3-3, and the cylinder end cover 3-4 is detachably fixedly connected with the disc diaphragm 3-3 and the cylinder base 3-1 through the end cover installation hole 3-4-1, the diaphragm installation hole 3-3-1, the fastening bolt countersunk hole 3-1-2 and the fastening bolt assembly 3-2.

[0092] Further, as Figures 15-23As shown, each of the rotation speed increasing modules 8 includes a gear mounting plate 8-1, a bearing IV8-2, a bearing V8-3, a bearing VI8-4, a double gear I8-5, a double gear II8-6, a double gear III8-7 and a single gear 8-8;

[0093] The gear mounting plate 8-1 is provided with a bearing mounting hole IV8-1-1, a U-shaped chute II8-1-2, a bearing mounting hole V8-1-3, a bearing mounting hole VI8-1-4 and five bolt countersunk holes III8-1-5; the bearing mounting hole IV8-1-1, the U-shaped chute II8-1-2, the bearing mounting hole V8-1-3, the bearing mounting hole VI8-1-4 are all arranged on the inner side of the gear mounting plate 8-1, and are respectively connected to the bearing mounting hole I1-3-5, the U-shaped chute I1-3-6, the bearing mounting hole V8-1-4 and the five bolt countersunk holes III8-1-5. The mounting holes II1-3-7 and the bearing mounting holes III1-3-8 correspond one to one; the five bolt countersunk holes III8-1-5 are arranged on the outside of the gear mounting plate 8-1, and correspond one to one with the five bolt countersunk holes II1-3-2 on the base 1-3, for mounting and fixing the gear mounting plate 8-1; the bearing IV8-2, the bearing V8-3 and the bearing VI8-4 are respectively installed in the bearing mounting hole IV8-1-1, the bearing mounting hole V8-1-3 and the bearing mounting hole VI8-1-4 on the gear mounting plate 8-1;

[0094] The double gear I8-5 is composed of a central axis of the double gear I and a large gear 8-5-1 and a small gear 8-5-3 of the double gear I fixedly mounted on the central axis of the double gear I; the central axis of the double gear I is located on both sides of the large gear 8-5-1 and the small gear 8-5-3 of the double gear I, and a shaft shoulder 8-5-2 of the double gear I is provided. The small gear end and the large gear end of the central axis of the double gear I are respectively mounted on the bearing IV8-2 and the bearing I1-4, and are limited by the shaft shoulder 8-5-2 of the double gear I;

[0095] The double gear II8-6 is composed of a double gear II central shaft and a double gear II small gear 8-6-1 and a double gear II large gear 8-6-3 fixedly mounted on the double gear II central shaft; the double gear II central shaft is located on both sides of the double gear II small gear 8-6-1 and the double gear II large gear 8-6-3, and a double gear II shaft shoulder 8-6-2 is provided. The small gear end and the large gear end of the double gear II central shaft are respectively slidably provided in the U-shaped slide groove I1-3-6 and the U-shaped slide groove II8-1-2, and are limited by the double gear II shaft shoulder 8-6-2;

[0096] The double gear III8-7 is composed of a double gear III central shaft and a double gear III small gear 8-7-3 and a double gear III large gear 8-7-1 fixedly mounted on the double gear III central shaft; the double gear III central shaft is located on both sides of the double gear III small gear 8-7-3 and the double gear III large gear 8-7-1, and a double gear III shaft shoulder 8-7-2 is provided. The small gear end and the large gear end of the double gear III central shaft are respectively mounted on the bearing V8-3 and the bearing II1-5, and are limited by the double gear III shaft shoulder 8-7-2;

[0097] The single-link gear 8-8 is composed of a single-link gear center shaft and a rotating gear 8-8-1 fixedly mounted on the single-link gear center shaft; the single-link gear center shaft is located on both sides of the single-link gear 8-8 and is provided with single-link gear shaft shoulders 8-8-2. The single-link gear center shaft is respectively installed on bearings VI8-4 and bearings III1-6 at the shorter end and longer end of the single-link gear 8-8, and is limited by the single-link gear shaft shoulders 8-8-2.

[0098] The double gear I8-5 is meshed with the double gear II small gear 8-6-1 through the double gear I large gear 8-5-1, thereby driving the double gear II8-6 to rotate, achieving a two-stage speed increase;

[0099] The double gear II8-6 is engaged with the double gear III small gear 8-7-3 through the double gear II large gear 8-6-3, thereby driving the double gear III8-7 to rotate, achieving a three-stage speed increase;

[0100] The double gear III 8-7 is meshed with the rotating gear 8-8-1 of the single gear 8-8 through the double gear III large gear 8-7-1, thereby driving the single gear 8-8 to rotate, achieving a four-stage speed increase.

[0101] Further, such as Figures 20-23 As shown, the modules of the double gear I large gear 8-5-1, the double gear I small gear 8-5-3, the double gear II large gear 8-6-3, the double gear II small gear 8-6-1, the double gear III large gear 8-7-1, the double gear III small gear 8-7-3 and the rotating gear 8-8-1 are m1, m2, m3, m4, m5, m6 and m7 respectively, and the number of teeth are n1, n2, n3, n4, n5, n6 and n7 respectively. The module relationship is m1=m2=m3=m4=m5=m6=m7, and the tooth number relationship is n1>n2, n3>n4, n5>n6 and n1+n4>n2+n3, n3+n6>n4+n5 and n5>n7.

[0102] Further, such as Figures 24-32As shown, the pendulum rod assembly 9 includes a moving rod 9-4, a 'T' shaped connecting rod 9-6, and two pendulum rod assembly units; each pendulum rod assembly unit includes a fixed rod 9-2, two pendulum rods 9-1, N piezoelectric unit connecting rods 9-5, N rotating hinges 9-7, and two connecting rods 9-8:

[0103] The two pendulum rods 9-1 are arranged side by side, and one end of each pendulum rod 9-1 is provided with a fixed rod connecting hole 9-1-1, a connecting rod connecting hole 9-1-2, and an incomplete gear 9-1-4, and the other end of each pendulum rod 9-1 is provided with N through holes III 9-1-3 arranged in a 'I' shape along the length direction, for mounting a plurality of PVDF piezoelectric units 10, N≥2;

[0104] The modulus of the incomplete gear 9-1-4 is m8, and the number of teeth when fully toothed is n8, m8=m2, n8>2, and the outer wall of the fixed rod 9-2 is provided with two snap spring grooves I 9-2-1, two snap spring grooves II 9-2-2, and two snap spring grooves III 9-2-3 at both ends respectively;

[0105] The outer wall of the moving rod 9-4 is symmetrically provided with two snap spring grooves V 9-4-1 at both ends; the lower rod 9-6-1 of the 'T' shaped connecting rod 9-6 is provided with a screw thread on the outer wall, and the cross rod of the 'T' shaped connecting rod 9-6 is provided with a through hole IV 9-6-2 penetrating through both ends, and the 'T' shaped connecting rod 9-6 is used for connecting the diaphragm cylinder 3 and the pendulum rod assembly 9; one end of the rotating hinge 9-7 is provided with a hinge mounting hole 9-7-1, and the connecting plate of the rotating hinge 9-7 is provided with two through holes V 9-7-2 symmetrically arranged left and right; the connecting rod 9-8 is provided with a through hole VI 9-8-1 and a through hole VII 9-8-2 at both ends respectively along the thickness direction;

[0106] The two pendulum rods 9-1 are arranged side by side and the one end is rotatably mounted on the fixed rod 9-2 through the fixed rod connecting hole 9-1-1 (between the snap spring groove I 9-2-1 and the snap spring groove II 9-2-2, and axially limited by the snap spring 5); the incomplete gear 9-1-4 of the pendulum rod 9-1 is engaged with the double gear I pinion 8-5-3, thereby driving the double gear I 8-5 to rotate, realizing one-stage speed increase;

[0107] One end of two connecting rods 9-8 is rotatably connected with corresponding swing rod 9-1 through pin 9-3 with snap spring slot penetrating through through hole VI 9-8-1 and connecting hole 9-1-2 of the connecting rod, and the other end of two connecting rods 9-8 is rotatably installed at both ends of moving rod 9-4 through through hole VII 9-8-2 and is axially limited by snap spring 5; 'T' shaped connecting rod 9-6 is gap fitted at the middle position of moving rod 9-4 through through hole IV 9-6-2; lower rod 9-6-1 of 'T' shaped connecting rod 9-6 is threadedly connected with threaded hole 3-6-1 of telescopic rod 3-6; N said piezoelectric unit connecting rods 9-5 (structure is same as moving rod 9-4) penetrate through hinge mounting hole 9-7-1 of corresponding rotating hinge 9-7, and the other end of two swing rods 9-1 is rotatably connected with both ends of N piezoelectric unit connecting rods 9-5 through N through holes III 9-1-3, respectively, and piezoelectric unit connecting rod 9-5 is axially limited by snap spring 5; swing rod assembly 9 is rotatably installed in through hole II 1-3-4 of left and right baffles of converter base 1 through fixed rod 9-2 and through hole II 1-3-4, and is limited by cooperation of snap spring 5 and snap spring slot III 9-2-3, preventing swing rod assembly 9 from sliding left and right on converter base 1.

[0108] Further, as shown in Figure 33 Two ends of the PVDF piezoelectric unit 10 are symmetrically provided with four piezoelectric unit mounting holes 10-1, the positions of the four piezoelectric unit mounting holes 10-1 correspond to through holes V 9-7-2 of two swing rod assembly units, and the PVDF piezoelectric unit 10 is installed on the rotating hinge 9-7 of the swing rod assembly 9 through the piezoelectric unit mounting hole 10-1, the through hole V 9-7-2 and the bolt assembly 11.

[0109] Further, as shown in Figures 34-40 Each of the friction power generation units 12 includes stator I 12-1, interdigital electrode 12-2, stator II 12-3, friction material I 12-4, rotor I 12-5, friction material II 12-6, rotor II 12-7 and bearing VII 12-8;

[0110] The rotor I12-5, the stator II12-3, the rotor II12-7, and the stator I12-1 are coaxially arranged in sequence; the center of the stator I12-1 is provided with a bearing mounting hole VII12-1-2, and the outer periphery of the stator I12-1 is provided with a plurality of lugs I, and the lugs I are provided with a stator I mounting hole 12-1-1; the bearing VII12-8 is mounted on the stator I12-1 through the bearing mounting hole VII12-1-2; the interdigital electrode 12-2 is adhered to the inner side of the stator I12-1 and the inner and outer sides of the stator II12-3 through glue respectively; the interdigital electrode 12-2 is used as an electrode of the friction material I12-4, and the interdigital electrode 12-2 can use metal materials with conductive properties such as aluminum, copper, gold, silver, etc., and the material of the interdigital electrode 12-2 in the embodiment is copper; the interdigital electrode 12-2 includes an electrode I12-2-1 and an electrode II12-2-2; both the electrode I12-2-1 and the electrode II12-2-2 are annular grid electrodes, and the areas of the electrode I12-2-1 and the electrode II12-2-2 are complementary;

[0111] The center of the stator I12-1 is provided with a shaft hole, the outer periphery of the stator II12-3 is provided with a plurality of lugs II, the lugs II are provided with a stator II mounting hole 12-3-1, and the position distribution of the stator II mounting hole 12-3-1 corresponds to the stator I mounting hole 12-1-1; the stator I12-1 and the stator II12-3 are coaxially and detachably fixedly connected, and the stator I12-1 and the stator II12-3 are mounted on the base 1-3 (the stator II mounting hole 12-3-1 and the stator I mounting hole 12-1-1 detachably fixedly connect the stator I12-1 and the stator II12-3 together through a single-head hexagonal stud 4 and a flat head bolt 1-2, and are mounted on the base 1-3 through a threaded hole II1-3-3); the friction material I12-4 is adhered to the interdigital electrode 12-2 through glue and completely covers it;

[0112] The center of the rotor I12-5 is provided with a circular groove 12-5-2, the bottom of the circular groove 12-5-2 is provided with a plurality of rotor I mounting holes 12-5-1, the rotor I12-5 is fixedly connected with the single-union gear center shaft through the rotor I mounting holes 12-5-1, a bolt assembly 11, and a flange coupling 6, can rotate with the single-union gear 8-8, and the flange surface of the flange coupling 6 is mounted on the side of the rotor I12-5 away from the circular groove 12-5-2; the structure and assembly mode of the rotor II12-7 are completely same as those of the rotor I12-5, and the rotor II12-7 rotates synchronously with the rotor I12-5;

[0113] The friction material II 12-6 is provided with a plurality of sectorial surfaces 12-6-1, which are uniformly distributed in a circle. The shape, area and number of the sectorial surfaces 12-6-1 correspond to the electrode I 12-2-1 and the electrode II 12-2-2. The friction material II 12-6 is adhered to the inner side of the rotor I 12-5 and the inner and outer sides of the rotor II 12-7 by adhesion respectively.

[0114] Further, as shown in Figure 34 , the friction material I 12-4 is an electrically negative material. The friction material I 12-4 is polytetrafluoroethylene (PTFE), polydimethylsiloxane (PDMS), polyvinyl chloride (PVC) or polyimide (Kapton) (insulating material with more easily obtained electrons). In the present embodiment, the friction material I 12-4 is polytetrafluoroethylene (PTFE).

[0115] Further, as shown in Figure 40 , the friction material II 12-6 is an electrically positive material. The friction material II 12-6 is aluminum, copper, gold or silver (metallic material with electric conductivity); or nylon, rabbit hair or hard rubber (insulating material with more easily lost electrons). In the present embodiment, the friction material II 12-6 is copper.

[0116] The working principle of the present application is as follows:

[0117] As shown in Figure 3 , Figure 5 , Figure 6 , Figure 8 , Figure 15 , Figure 18 , Figure 26 , Figure 34 , Figure 36 and Figure 41As shown, the present application utilizes the pressure energy in the pneumatic system, and proposes a diaphragm type gas pressure energy converter based on piezoelectric-friction composite, which can realize the simultaneous capture of piezoelectric energy and frictional electricity, and improve the electrical energy output of the gas pressure energy converter. The specific process is as follows: when the gas enters the intake cavity 100 (the intake cavity 100 is formed by the space between the bottom surface of the disc-shaped diaphragm 3-3 and the diaphragm mounting cavity 3-1-3 bottom surface of the cylinder base 3-1) from the intake hole 3-1-1, the pressure in the intake cavity 100 rises, the disc-shaped diaphragm 3-3 bulges upward, and then pushes the telescopic rod 3-6 to move upward and drives the swing rod 9-1 to swing outward, and the excess gas in the exhaust cavity 101 (formed by the space between the bottom surface of the disc-shaped diaphragm 3-3 and the cylinder end cover 3-4) is discharged to the atmosphere through the exhaust hole 3-4-4. When the gas is disconnected, the pressure in the intake cavity 100 decreases, and at the same time, the telescopic rod 3-6 moves downward under the action of the return spring 3-5 and drives the swing rod 9-1 to swing inward, and the disc-shaped diaphragm 3-3 restores to deformation. When the swing rod 9-1 swings back and forth periodically, the PVDF piezoelectric unit 10 can be bent and deformed, and piezoelectric energy can be generated. At the same time, the incomplete gear 9-1-4 arranged at the end of the swing rod 9-1 can drive the rotating speed-up module 8 to rotate, improve the rotating speed of the friction power generation unit 12, and then get the performance enhanced frictional electricity output.

[0118] In order to keep the friction power generation unit 12 from reversing when the swing rod 9-1 reverses and resets, a U-shaped sliding groove I1-3-6 and a U-shaped sliding groove II 8-1-2 are arranged on the base 1-3 and the gear mounting plate 8-1 respectively, so that the gear in the rotating speed-up module 8 is disengaged when the swing rod 9-1 reverses and resets, and then the friction power generation unit 12 always rotates in the same direction.

[0119] The friction material I12-4 pasted on the inner side of the stator I12-1 and the inner and outer sides of the stator II 12-3 and the friction material II 12-6 pasted on the inner side of the rotor I12-5 and the inner and outer sides of the rotor II 12-7 together constitute three pairs of friction power generation units. When the rotor I12-5 and the rotor II 12-7 rotate synchronously, due to the different electron loss abilities of the friction material I12-4 and the friction material II 12-6, based on the principle of friction electrification and electrostatic induction coupling, electrons will flow back and forth between the electrode I12-2-1 and the electrode II 12-2-2 on the interdigital electrode 12-2, generating frictional electricity.

[0120] In summary, when the periodically on-off gas in the pneumatic system flows into the diaphragm type gas pressure energy converter, the gas pressure energy converter can simultaneously output piezoelectric and frictional electricity.

[0121] The above merely provides the preferred embodiments of the present application, and the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacements or changes according to the technical scheme and the inventive concept of the present application within the technical scope disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A diaphragm-type air pressure energy converter based on piezoelectric-triboelectric composite, characterized by: The diaphragm-type air pressure energy converter comprises a converter base (1), a diaphragm cylinder (3), a flange coupling (6), a rocker assembly (9), a PVDF piezoelectric unit (10), two rotation speed increasing modules (8) and two friction power generation units (12); The diaphragm cylinder (3) is detachably fixedly mounted on the converter base (1); the two rotation speed increasing modules (8) are symmetrically arranged relative to the center of the converter base (1) and are mounted on the inner sides of the left and right baffles of the converter base (1); the lower end of the middle portion of the rocker assembly (9) is detachably fixedly connected to the telescopic rod (3-6) of the diaphragm cylinder (3); the left and right ends of the middle portion of the rocker assembly (9) are rotatably connected to the left and right baffles of the converter base (1); the PVDF piezoelectric unit (10) is fixedly mounted on the rocker assembly (9); the two friction power generation units (12) are symmetrically fixedly mounted on the outer sides of the left and right baffles of the converter base (1); the friction power generation units (12) are detachably fixedly connected to the rotation speed increasing module (8) via a flange coupling (6); and the incomplete gear (9-1-4) arranged at the end of the rocker (9-1) can drive the rotation speed increasing module (8) to rotate.

2. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 1, characterized in that: The converter base (1) comprises a cylinder mounting seat (1-1), a base (1-3), a bearing I (1-4), a bearing II (1-5) and a bearing III (1-6); The cylinder mounting seat (1-1) is composed of two side plates and a top plate fixedly connected to the upper ends of the two side plates. A through hole I (1-1-2) is provided at the center of the top plate of the cylinder mounting seat (1-1) for fixedly connecting the diaphragm cylinder (3) and the converter base (1). The base (1-3) is composed of a seat plate and left and right baffles fixed on the left and right sides of the seat plate. The left baffle and the right baffle are symmetrically provided with bearing mounting holes I (1-3-5), U-shaped slide grooves I (1-3-6), bearing mounting holes II (1-3-7) and bearing mounting holes II I (1-3-8), the U-shaped slide groove I (1-3-6) is arranged along the front-to-back direction; the cylinder mounting seat (1-1) is installed on the base (1-3), and the two side plates of the cylinder mounting seat (1-1) are detachably fixedly connected to the front and rear side surfaces of the seat plate of the base (1-3); the bearing I (1-4), bearing II (1-5) and bearing III (1-6) are respectively installed in the bearing mounting hole I (1-3-5), bearing mounting hole II (1-3-7) and bearing mounting hole III (1-3-8) of the base (1-3).

3. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 2, characterized in that: The diaphragm cylinder (3) comprises a cylinder base (3-1), a disc-shaped diaphragm (3-3), a cylinder end cover (3-4), a return spring (3-5) and a telescopic rod (3-6); An air inlet (3-1-1) is provided at the middle position of the bottom of the cylinder base (3-1), and a diaphragm mounting cavity (3-1-3) is provided at the middle position of the top of the cylinder base (3-1); the disc-shaped diaphragm (3-3) is mounted on the cylinder base (3-1) through the diaphragm mounting cavity (3-1-3); a central column is provided at the middle of the cylinder end cover (3-4), a limiting hole (3-4-2) is provided at the center of the central column, and the lower end of the central column is provided as a limiting boss (3-4-3) in the inner cavity of the cylinder end cover (3-4); the upper end of the central column serves as a connecting end (3-4-5) protruding from the top surface of the cylinder end cover (3-4), the outer wall of the connecting end (3-4-5) is provided with an external thread, and the connecting end (3-4-5) passes through the through hole I (1-1-2) on the cylinder mounting seat (1-1). The diaphragm cylinder (3) is mounted on the converter base (1) via a locking nut (2), and an exhaust hole (3-4-4) is provided on the top of the cylinder end cover (3-4); a threaded hole (3-6-1) is provided axially at the middle position of the rod end of the telescopic rod (3-6); the reset spring (3-5) is sleeved on the outside of the telescopic rod (3-6), one end of the reset spring (3-5) is fixed to the head of the telescopic rod (3-6), and the other end is fixed to the limiting boss (3-4-3) of the cylinder end cover (3-4); the rod end of the telescopic rod (3-6) is slidably arranged in the limiting hole (3-4-2) of the cylinder end cover (3-4), the head end of the telescopic rod (3-6) is arranged on the disc-shaped diaphragm (3-3), and the cylinder end cover (3-4) is detachably fixedly connected to the disc-shaped diaphragm (3-3) and the cylinder base (3-1).

4. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 1, characterized in that: Each of the rotation speed increasing modules (8) comprises a gear mounting plate (8-1), a bearing IV (8-2), a bearing V (8-3), a bearing VI (8-4), a double gear I (8-5), a double gear II (8-6), a double gear III (8-7) and a single gear (8-8); The gear mounting plate (8-1) is provided with a bearing mounting hole IV (8-1-1), a U-shaped chute II (8-1-2), a bearing mounting hole V (8-1-3), and a bearing mounting hole VI (8-1-4); the bearing mounting hole IV (8-1-1), the U-shaped chute II (8-1-2), the bearing mounting hole V (8-1-3), and the bearing mounting hole VI (8-1-4) are all provided on the inner side of the gear mounting plate (8-1) and are respectively connected to the base (1 -3), the bearing mounting hole I (1-3-5), the U-shaped slide groove I (1-3-6), the bearing mounting hole II (1-3-7) and the bearing mounting hole III (1-3-8) correspond to each other one by one; the bearing IV (8-2), the bearing V (8-3) and the bearing VI (8-4) are respectively mounted in the bearing mounting hole IV (8-1-1), the bearing mounting hole V (8-1-3) and the bearing mounting hole VI (8-1-4) on the gear mounting plate (8-1); The double gear I (8-5) is composed of a double gear I central shaft, a double gear I large gear (8-5-1) fixedly mounted on the double gear I central shaft, and a double gear I small gear (8-5-3); the double gear I central shaft is located on both sides of the double gear I large gear (8-5-1) and the double gear I small gear (8-5-3) and is provided with a double gear I shaft shoulder (8-5-2); the small gear end and the large gear end of the double gear I central shaft are respectively mounted on bearing IV (8-2) and bearing I (1-4), and are limited by the double gear I shaft shoulder (8-5-2); The double gear II (8-6) is composed of a double gear II central shaft, a double gear II pinion (8-6-1) fixedly mounted on the double gear II central shaft, and a double gear II large gear (8-6-3); the double gear II central shaft is located on both sides of the double gear II pinion (8-6-1) and the double gear II large gear (8-6-3), and is provided with a double gear II shaft shoulder (8-6-2); the pinion end and the large gear end of the double gear II central shaft are respectively slidably arranged in the U-shaped slide groove I (1-3-6) and the U-shaped slide groove II (8-1-2), and are limited by the double gear II shaft shoulder (8-6-2); The double gear III (8-7) is composed of a double gear III central shaft, a double gear III pinion (8-7-3) fixedly mounted on the double gear III central shaft, and a double gear III large gear (8-7-1); the double gear III central shaft is located on both sides of the double gear III pinion (8-7-3) and the double gear III large gear (8-7-1), and a double gear III shaft shoulder (8-7-2) is provided; the pinion end and the large gear end of the double gear III central shaft are respectively mounted on bearing V (8-3) and bearing II (1-5), and are limited by the double gear III shaft shoulder (8-7-2); The single-link gear (8-8) is composed of a single-link gear central shaft and a rotating gear (8-8-1) fixedly mounted on the single-link gear central shaft; the single-link gear central shaft is located on both sides of the single-link gear (8-8) and is provided with single-link gear shaft shoulders (8-8-2); the single-link gear central shaft is respectively mounted on bearing VI (8-4) and bearing III (1-6) at the shorter end and the longer end of the single-link gear (8-8), and is limited by the single-link gear shaft shoulders (8-8-2); The double gear I (8-5) is meshed with the double gear II small gear (8-6-1) through the double gear I large gear (8-5-1), thereby driving the double gear II (8-6) to rotate, thereby achieving a two-stage speed increase; the double gear II (8-6) is meshed with the double gear III small gear (8-7-3) through the double gear II large gear (8-6-3), thereby driving the double gear III (8-7) to rotate, thereby achieving a three-stage speed increase; the double gear III (8-7) is meshed with the rotating gear (8-8-1) of the single gear (8-8) through the double gear III large gear (8-7-1), thereby driving the single gear (8-8) to rotate, thereby achieving a four-stage speed increase.

5. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 4, characterized in that: The modules of the double gear I large gear (8-5-1), double gear I small gear (8-5-3), double gear II large gear (8-6-3), double gear II small gear (8-6-1), double gear III large gear (8-7-1), double gear III small gear (8-7-3) and rotating gear (8-8-1) are m1, m2, m3, m4, m5, m6 and m7 respectively, and the number of teeth are n1, n2, n3, n4, n5, n6 and n7 respectively. The module relationship is m1=m2=m3=m4=m5=m6=m7, and the tooth number relationship is n1>n2, n3>n4, n5>n6, and n1+n4>n2+n3, n3+n6>n4+n5 and n5>n7.

6. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 4, characterized in that: The rocker assembly (9) comprises a moving rod (9-4), a 'T'-shaped connecting rod (9-6) and two rocker assembly units; each rocker assembly unit comprises a fixed rod (9-2), two rocker rods (9-1), N Piezoelectric unit connecting rod (9-5), N A rotating hinge (9-7) and two connecting rods (9-8): The two pendulum rods (9-1) are arranged side by side, and one end of the two pendulum rods (9-1) is provided with an incomplete gear (9-1-4), and the other end of the two pendulum rods (9-1) is provided with a straight line arrangement along the length direction. N Through holes III (9-1-3) are used for mounting multiple PVDF piezoelectric units (10). N ≥2; a thread is provided on the outer wall of the lower rod (9-6-1) of the 'T'-shaped connecting rod (9-6); a through hole IV (9-6-2) is provided inside the cross rod of the 'T'-shaped connecting rod (9-6) and passes through both ends; one end of the rotating hinge (9-7) is provided with a hinge mounting hole (9-7-1); two rocker rods (9-1) are arranged in parallel and one end is respectively rotatably mounted on the fixed rod (9-2); the incomplete gear (9-1-4) of the rocker rod (9-1) is engaged with the small gear (8-5-3) of the double gear I, thereby driving the double gear I (8-5) to rotate, thereby achieving a first-stage speed increase; One end of the two connecting rods (9-8) is rotatably connected to the corresponding swing rod (9-1), and the other ends of the two connecting rods (9-8) are rotatably mounted on the two ends of the moving rod (9-4); the 'T'-shaped connecting rod (9-6) is spaced and sleeved in the middle position of the moving rod (9-4); the lower rod (9-6-1) of the 'T'-shaped connecting rod (9-6) is threadedly connected to the threaded hole (3-6-1) of the telescopic rod (3-6); N The piezoelectric unit connecting rod (9-5) passes through the hinge mounting hole (9-7-1) of the corresponding rotating hinge (9-7), and the other ends of the two rocking rods (9-1) are connected to the hinge mounting hole (9-7-1) of the corresponding rotating hinge (9-7). N The two ends of the piezoelectric unit connecting rod (9-5) are rotatably connected; the rocker assembly (9) is rotatably mounted in through holes II (1-3-4) provided on the left and right baffles of the converter base (1) via a fixed rod (9-2).

7. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 6, characterized in that: The PVDF piezoelectric unit (10) is mounted on the rotating hinge (9-7) of the rocker assembly (9).

8. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 6, characterized in that: Each of the friction power generation units (12) includes a stator I (12-1), interdigital electrodes (12-2), a stator II (12-3), a friction material I (12-4), a rotor I (12-5), a friction material II (12-6), a rotor II (12-7) and a bearing VII (12-8); The rotor I (12-5), stator II (12-3), rotor II (12-7), and stator I (12-1) are coaxially arranged in sequence; a bearing mounting hole VII (12-1-2) is provided at the center of the stator I (12-1); the bearing VII (12-8) is mounted on the stator I (12-1) through the bearing mounting hole VII (12-1-2); the interdigitated electrodes (12-2) are respectively adhered to the inner side surface of the stator I (12-1) and the inner and outer side surfaces of the stator II (12-3) by glue; the interdigitated electrodes (12-2) include an electrode I (12-2-1) and an electrode II (12-2-2); the electrode I (12-2-1) and the electrode II (12-2-2) are both annular grid electrodes, and the areas of the electrode I (12-2-1) and the electrode II (12-2-2) are complementary; The stator I (12-1) is provided with an axial hole at its center. The stator I (12-1) and the stator II (12-3) are coaxial and detachably fixedly connected at their outer peripheries. The stator I (12-1) and the stator II (12-3) are mounted on a base (1-3). The friction material I (12-4) is glued to the interdigital electrode (12-2) and completely covers it. The rotor I (12-5) is fixedly connected to the central shaft of the single gear through a flange coupling (6). The structure and assembly method of the rotor II (12-7) are the same as those of the rotor I (12-5). The rotor I (12-5) is completely identical and rotates synchronously with the rotor I (12-5); the friction material II (12-6) is provided with a plurality of sector-shaped surfaces (12-6-1) and is evenly distributed on the circumference; the shape, area and number of the sector-shaped surfaces (12-6-1) correspond to those of the electrode I (12-2-1) and the electrode II (12-2-2); the friction material II (12-6) is adhered to the inner side surface of the rotor I (12-5) and the inner and outer side surfaces of the rotor II (12-7) by gluing.

9. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 8, characterized in that: The friction material I (12-4) is a ring-shaped electronegative material. The friction material I (12-4) is polytetrafluoroethylene, polydimethylsiloxane, polyvinyl chloride or polyimide.

10. The piezoelectric-triboelectric composite diaphragm-type air pressure energy converter according to claim 8, characterized in that: The friction material II (12-6) is an electropositive material, and the friction material II (12-6) is aluminum, copper, gold or silver; or nylon, rabbit hair or hard rubber.

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