Flexible blade swing pump and oil pumping method thereof

Abstract

The present invention discloses a flexible vane oscillating pump and an oil pumping method thereof, comprising an oscillating pump housing, a rotating shaft at one end of which is located inside the oscillating pump housing and extending out of the oscillating pump housing at the other end, a first oil inlet and discharge mechanism, a vane oil pumping mechanism and a second oil inlet and discharge mechanism being coaxially arranged in the oscillating pump housing, and the rotating shaft coaxially passes through the first oil inlet and discharge mechanism, the vane oil pumping mechanism and the second oil inlet and discharge mechanism; the vane oil pumping mechanism comprises a flexible vane having an internal cavity, which can be elastically deformed by external force and change the volume of the internal cavity; and a vane pulling mechanism connected to the flexible vane and the rotating shaft, which can elastically deform the flexible vane by rotation of the rotating shaft; the flexible vane is located in the placement cavity, and the portion of the placement cavity where the flexible vane is not arranged is the external cavity; the first oil inlet and discharge mechanism comprises a first oil inlet and discharge oil channel that is simultaneously connected to the internal cavity and the external cavity, and the second oil inlet and discharge mechanism comprises a second oil inlet and discharge oil channel that is simultaneously connected to the internal cavity and the external cavity.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic pump equipment, in particular to a flexible blade swing pump and an oil pumping method thereof. Background Art

[0002] The oscillating pump is a type of hydraulic pump. Compared with other types of pumps, the oscillating pump is particularly suitable for conveying viscous fluid media or multiphase flow media. It is relatively widely used in the petrochemical, pharmaceutical, food and other industries.

[0003] However, the current oscillating pumps have problems such as complex structure, low working pressure, low efficiency, high noise, and high cost. Summary of the Invention

[0004] The purpose of the present invention is to solve the deficiencies of the above-mentioned background technology and to provide a flexible blade swing pump and an oil pumping method thereof which has low cost, simple structure, high working pressure, high efficiency and low noise.

[0005] To achieve this purpose, the flexible vane oscillating pump designed by the present invention includes an oscillating pump housing, a rotating shaft at one end of which is located inside the oscillating pump housing and the other end of which extends out of the oscillating pump housing, wherein a first oil supply and discharge mechanism, a vane pump oil mechanism and a second oil supply and discharge mechanism are coaxially arranged in the oscillating pump housing, and the rotating shaft coaxially passes through the first oil supply and discharge mechanism, the vane pump oil mechanism and the second oil supply and discharge mechanism; the vane pump oil mechanism includes a flexible vane having an internal cavity, which can be elastically deformed by external force and change the volume of the internal cavity; and a vane pulling mechanism connected to the flexible vane and the rotating shaft, which can elastically deform the flexible vane by rotation of the rotating shaft; the flexible vane is located in the placement cavity, and the part of the placement cavity where the flexible vane is not arranged is the external cavity; the first oil supply and discharge mechanism includes a first oil supply and discharge oil channel that is simultaneously connected to the internal cavity and the external cavity, and the second oil supply and discharge mechanism includes a second oil supply and discharge oil channel that is simultaneously connected to the internal cavity and the external cavity.

[0006] Furthermore, the first oil inlet and outlet mechanism includes a first oil distribution plate and a first inner disc coaxially fixed with the first oil distribution plate, and an inner ring coaxially fixedly connected to the first inner disc as an integral structure with the first inner disc; the second oil inlet and outlet mechanism includes a second oil distribution plate and a second inner disc coaxially fixed with the second oil distribution plate; the annular surface of the inner ring facing the second inner disc fits with the disc surface of the second inner disc facing the inner ring, and the outer diameter of the inner ring is smaller than the outer diameter of the second inner disc; the first inner disc, the inner ring and the second inner disc form the placement cavity. By rationally designing the structure of the first inner disc, the inner ring and the second inner disc, a placement cavity is formed for arranging flexible blades, which has a simple structure and is easy to disassemble and assemble.

[0007] Furthermore, the blade pulling mechanism includes an inner helical disc coaxially fixedly mounted on the rotating shaft and an outer helical disc coaxially mounted at the junction of the inner ring and the second inner disc. The outer helical disc is axially positioned by the cooperation of the inner ring and the second inner disc, and the flexible blade is connected between the inner and outer helical discs via a buckle. When the inner and outer helical discs rotate relative to each other, the ends of the flexible blade are pulled by the buckle, causing deformation, thereby changing the volume of the internal and external cavities, thereby achieving oil suction and pumping of the oscillating pump.

[0008] Furthermore, the outer helical disc is coaxially sleeved and mounted on the annular outer surface of the inner ring on the side close to the second inner disc, and a positioning boss is provided on the annular outer surface of the inner ring on the side away from the second inner disc, which cooperates with the disc surface of the outer helical disc on the side away from the second inner disc. The buckle includes an outer buckle connected to the outer helical disc, and the outer buckle is positioned and mounted between the outer helical disc and the second inner disc. The inner ring is provided with an outer buckle positioning groove that cooperates with the outer buckle, and the outer buckle can move in the radial direction of the inner ring within the outer buckle positioning groove. The outer buckle only moves in the radial direction of the inner ring, and the two ends of the flexible blade are only pulled or compressed, and the position of the flexible blade remains unchanged.

[0009] Furthermore, the inner helical disc is coaxially disposed in the middle of the first inner disc, the inner helical disc being located within the inner ring. The buckle includes an inner buckle group connected to the inner helical disc, each inner buckle group including two inner buckles connected to the axial front and rear surfaces of the inner helical disc, respectively. An inner buckle positioning groove is defined in the middle of the first inner disc to cooperate with the inner buckle, and the inner buckle can move in the inner buckle positioning groove along the radial direction of the first inner disc. The inner buckle moves only in the radial direction of the first inner disc, and the ends of the flexible blade are only pulled or compressed, while the position of the flexible blade remains unchanged.

[0010] Furthermore, the flexible blade includes a blade shell having an internal cavity that is wide in the middle and narrow at both ends, and snap-fit ​​connectors fixedly connected to both ends of the blade shell and integral with the blade shell. The flexible blade is made of a material such as plastic, has a simple structure, and can recover after elastic deformation.

[0011] Furthermore, a snap-on positioning groove is defined within the snap-on connection portion, and a snap-on positioning portion is provided at one end of the snap-on to cooperate with the snap-on positioning groove, and the snap-on positioning portion is disposed within the snap-on positioning groove; the inner and outer spiral disks are both provided with multi-layered annular spiral bosses, and the other end of the snap-on is defined with a spiral groove that cooperates with the spiral bosses. The snap-on positioning groove cooperates with the snap-on positioning portion to achieve installation and positioning of the snap-on. Preferably, both the snap-on positioning groove and the snap-on positioning portion have a dovetail structure, which provides stable assembly, a simple structure, and ease of manufacture.

[0012] Furthermore, the first oil inlet and outlet passages include a first oil inlet and a first oil outlet opened on the first oil distribution plate; a first internal oil passage opened in the first oil distribution plate and communicating with the first oil inlet and the first oil outlet; and a first oil distribution window opened on the first inner disc and communicating with the first internal oil passage and communicating with the internal cavity or the external cavity; the second oil inlet and outlet passages include a second oil inlet and a second oil outlet opened on the second oil distribution plate; a second internal oil passage opened in the second oil distribution plate and communicating with the second oil inlet and the second oil outlet; and a second oil distribution window opened on the second inner disc and communicating with the second internal oil passage and communicating with the internal cavity or the external cavity; and the housing of the oscillating pump includes a housing oil inlet connected to the first oil inlet or the second oil inlet, and a housing oil outlet connected to the first oil outlet or the second oil outlet. Both the first and second oil inlet and outlet passages can realize oil intake and oil discharge, greatly improving the oil intake and oil discharge efficiency of the oscillating pump, increasing the power of the oscillating pump, and achieving better oil pumping effect.

[0013] Furthermore, the oscillating pump housing is equipped with a pull-enhancing mechanism for enhancing the pulling effect of the blades. This mechanism comprises an arcuate rack fixed to the outer helical disc and arranged circumferentially along the disc, and a drive gear meshing with the arcuate rack. This pull-enhancing mechanism further enhances the deformation of the flexible blades, and by increasing the deformation rate of the flexible blades, the oscillating pump's oil pumping power is further increased.

[0014] Furthermore, based on the above-mentioned flexible blade swing pump, the oil pumping method is as follows: the shaft is driven to rotate, the shaft drives the blade pulling mechanism to move, the volume of the internal cavity is changed, and oil is sucked through the oil inlet of the first oil inlet and exhaust oil channel or the oil inlet of the second oil inlet and exhaust oil channel, and the oil liquid enters the first oil inlet and exhaust oil channel or the second oil inlet and exhaust oil channel, and is pumped out through the oil outlet of the first oil inlet and exhaust oil channel or the oil outlet of the second oil inlet and exhaust oil channel.

[0015] The present invention utilizes flexible blades as its foundation, employing a blade-pulling mechanism within an oscillating pump. Pulling the flexible blades causes them to elastically deform, changing the volume of the internal cavity and, consequently, the volume of the external cavity. This volumetric change in the internal or external cavity enables both oil suction and pumping, resulting in a simple structure, strong self-priming capability, smooth operation, low noise, and low cost. The oscillating pump is simple and convenient to assemble and disassemble, facilitating repair and component replacement, and reducing subsequent operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the flexible blade oscillating pump designed for the present invention;

[0017] Figure 2 An exploded view of the flexible blade oscillating pump designed for the present invention;

[0018] Figure 3 An axial cross-sectional view of the flexible blade oscillating pump designed for the present invention;

[0019] Figure 4 A three-dimensional diagram of the internal structure of the left housing of the flexible blade oscillating pump designed for the present invention;

[0020] Figure 5 A perspective view of the first oil distribution plate of the present invention;

[0021] Figure 6 is a three-dimensional diagram of the first inner disc and the inner ring in the present invention;

[0022] Figure 7 This is a schematic diagram of the structure of the flexible blades connected to the inner and outer spiral disks in the present invention;

[0023] Figure 8 This is a schematic diagram of the oil pipeline connection of the oscillating pump in the present invention;

[0024] Among them, 1—swing pump housing (1.1—left housing, 1.2—right housing, 1.3—bearing end cover), 2—rotating shaft, 3—inner cavity, 4—flexible blade (4.1—blade housing, 4.2—snap-on connection part, 4.3—snap-on positioning groove), 5—placement cavity, 6—external cavity, 7—first oil distribution plate, 8—first inner disc, 9—inner ring, 10—second oil distribution plate, 11—second inner disc, 12—inner helical disc, 13—outer helical disc, 14—positioning cam Platform, 15—external snap, 16—external snap positioning groove, 17—inner snap, 18—inner snap positioning groove, 19—snap positioning portion, 20—helical boss, 21—helical snap groove, 22—first oil inlet, 23—first oil discharge port, 24—first internal oil passage, 25—first oil distribution window, 26—second oil inlet, 27—second oil discharge port, 28—second internal oil passage, 29—second oil distribution window, 30—arc-shaped rack, 31—drive gear, 32—bearing, 33—one-way valve. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figure 1 The flexible vane oscillating pump shown in FIG7 includes an oscillating pump housing 1, which is assembled and fixed by a left housing 1.1, a right housing 1.2, and a bearing end cap 1.3. A rotating shaft 2 is disposed within the oscillating pump housing 1. A bearing 32 is disposed within both the left and right housings 1.1, 1.2, for engagement with the rotating shaft 2. The rotating shaft 2 is rotatably mounted within the oscillating pump housing 1 via the bearing 32. One end of the rotating shaft 2 is located within the oscillating pump housing 1, while the other end extends beyond the housing 1 for connection to the motor. A first oil inlet and outlet mechanism, a vane oil pumping mechanism, and a second oil inlet and outlet mechanism are coaxially disposed within the oscillating pump housing 1. The first oil inlet and outlet mechanism is assembled within the left housing 1.1, while the second oil inlet and outlet mechanism is assembled within the right housing 1.2. The vane oil pumping mechanism is disposed between the first and second oil inlet and outlet mechanisms, with the rotating shaft 2 coaxially passing through the first, vane, and second oil inlet and outlet mechanisms.

[0027] The vane oil pumping mechanism includes a flexible vane 4 having an internal cavity 3, which can be elastically deformed by external force and change the volume of the internal cavity 3; and a vane pulling mechanism connected to the flexible vane 4 and the rotating shaft 2, which can elastically deform the flexible vane 4 by rotation of the rotating shaft 2; the flexible vane 4 is located in the placement cavity 5, and the part of the placement cavity 5 where the flexible vane 4 is not arranged is the external cavity 6.

[0028] Specifically, the blade pulling mechanism includes an inner helical disk 12 and an outer helical disk 13 connected to the two ends of the flexible blade 4 by snaps. The flexible blade 4 includes a blade shell 4.1 having an internal cavity 3 that is wide in the middle and narrow at both ends, and a snap connection portion 4.2 fixedly connected to the two ends of the blade shell 4.1 and integrally formed with the blade shell 4.1. A dovetail-shaped snap positioning groove 4.3 is provided in the snap connection portion 4.2. Multi-layer annular helical bosses 20 are provided on the axial outer surfaces of both sides of the inner helical disk 12 and on the axial outer surface of one side of the outer helical disk 13. The snaps include an inner snap group connected to the inner helical disk 12 and an outer snap 15 connected to the outer helical disk 13. Each group of inner snaps includes two inner snaps 17 respectively connected to the axial front and rear surfaces of the inner helical disk 12. One end of the outer snap 15 and one end of the inner snap 17 are both provided with a dovetail-shaped snap positioning portion 19 that cooperates with the snap positioning groove 4.3. The snap positioning portion 19 is arranged in the snap positioning groove 4.3. The other end of the outer snap 15 and the other end of the inner snap 17 are both provided with a spiral groove 21 that cooperates with the spiral boss 20. The spiral groove 21 is clamped on the spiral boss 20.

[0029] The first oil inlet and discharge mechanism includes a first oil distribution plate 7 and a first inner disc 8 coaxially fixed to the first oil distribution plate 7, and an inner ring 9 coaxially fixed to the first inner disc 8 is integrally connected to the first inner disc 8; the second oil inlet and discharge mechanism includes a second oil distribution plate 10 and a second inner disc 11 coaxially fixed to the second oil distribution plate 10; the annular surface of the inner ring 9 facing the second inner disc 11 is in contact with the disc surface of the second inner disc 11 facing the inner ring 9, and the outer diameter of the inner ring 9 is smaller than the outer diameter of the second inner disc 11; the first inner disc 8, the inner ring 9 and the second inner disc 11 form a placement cavity 5.

[0030] An inner helical disc 12 is coaxially mounted in the center of the first inner disc 8 and positioned within the inner ring 9. A snap-fitting groove 18 is defined in the center of the first inner disc 8, engaging an inner snap 17. The inner snap 17 can move radially along the first inner disc 8 within the groove 18. Furthermore, the inner helical disc 12 is secured to the rotating shaft 2 via a spline. Rotation of the rotating shaft 2 drives the inner helical disc 12 to rotate.

[0031] The outer helical disc 13 is coaxially mounted on the annular outer surface of the inner ring 9 near the second inner disc 11. A positioning boss 14 is provided on the annular outer surface of the inner ring 9 away from the second inner disc 11, which cooperates with the outer helical disc 13's surface away from the second inner disc 11. A helical boss 20 is provided on the outer helical disc 13's surface near the second inner disc 11 and is connected to an outer clip 15. The inner ring 9 is provided with an outer clip positioning groove 16 that cooperates with the outer clip 15. The outer clip 15 can move radially within the outer clip positioning groove 16 along the inner ring 9. The outer clip 15 and the outer helical disc 13's surface near the second inner disc 11 are axially positioned by the inner ring 9 and the second inner disc 11. The outer helical disc 13 is axially positioned by the positioning boss 14 and the assembly of the inner ring 9, the outer clip 15, and the second inner disc 11.

[0032] When the inner helical disc 12 rotates with the shaft 2, the outer helical disc 13 and the inner helical disc 12 will pull the two ends of the flexible blade 4 through the buckle, causing the flexible blade 4 to elastically deform and change the volume of the internal cavity 3. Figure 7 As shown, the inner end of the flexible blade 4 (the end close to the inner helical disk 12) is connected to the helical boss 20 of the inner helical disk 12 through the inner snap 17. When the inner helical disk 12 rotates counterclockwise, the inner snap 17 rotates with the inner helical disk 12. However, due to the action of the inner snap locating groove 18, the inner snap 17 cannot make a spiral motion and can only make a radial motion. At this time, the inner snap 17 pulls the inner end of the flexible blade 4, and the inner snap 17 and the helical boss 20 of the inner helical disk 12 slide relative to each other. The inner snap 17 gradually engages with the helical boss 20 on the inner side of the inner helical disk 12, pulling the flexible blade 4 outward, the volume of the internal cavity 3 of the flexible blade 4 becomes smaller, and the volume of the external cavity 6 becomes larger; similarly, the flexible blade 4 The outer end (the end close to the outer helical disk 13) is connected to the helical boss 20 of the outer helical disk 13 through the outer snap 15. When the outer helical disk 13 rotates clockwise, the outer snap 15 rotates with the outer helical disk 13. However, due to the action of the outer snap locating groove 16, the outer snap 15 cannot make spiral motion and can only make radial motion. At this time, the outer snap 15 pulls the outer end of the flexible blade 4, and the outer snap 15 and the helical boss 20 of the outer helical disk 13 slide relative to each other. The outer snap 15 gradually engages with the helical boss 20 on the outside of the outer helical disk 13, pulling the flexible blade 4 outward, and the volume of the internal cavity 3 of the flexible blade 4 becomes smaller, and the volume of the external cavity 6 becomes larger; at this time, oil is sucked by the external cavity 6 and oil is pumped by the internal cavity 3. Similarly, when the inner helical disc 12 rotates clockwise or the outer helical disc 13 rotates counterclockwise, oil is pumped from the outer cavity 6 and the inner cavity 3 absorbs oil.

[0033] To further enhance the pulling effect of the flexible blades 4, a pulling reinforcement mechanism is also provided within the oscillating pump housing 1. The pulling reinforcement mechanism includes an arcuate rack 30 fixed to the outer helical disc 13 and arranged along the circumference of the outer helical disc 13, and a drive gear 31 meshing with the arcuate rack 30. The drive gear 31 drives the arcuate rack 30, and the outer helical disc 13 rotates with the arcuate rack 30.

[0034] The first oil inlet and outlet mechanism also includes a first oil inlet and outlet oil channel connected to the internal cavity 3 and the external cavity 6 at the same time, which includes a first oil inlet 22 and a first oil outlet 23 opened on the first oil distribution plate 7; a first internal oil channel 24 opened in the first oil distribution plate 7 and connected to the first oil inlet 22 and the first oil outlet 23; and a first oil distribution window 25 connected to the first internal oil channel 24, opened on the first inner disc 8 and connected to the internal cavity 3 or the external cavity 6; a one-way valve 33 is provided at the first oil inlet 22 and the first oil outlet 23, and the oil can be pumped out through the first oil inlet 22, the first internal oil channel 24, the first oil distribution window 25, the first internal oil channel 24 and the first oil outlet 23 in sequence.

[0035] The second oil inlet and outlet mechanism also includes a second oil inlet and outlet oil passage that is connected to the internal cavity 3 and the external cavity 6 at the same time, which includes a second oil inlet 26 and a second oil outlet 27 opened on the second oil distribution plate 10; a second internal oil passage 28 opened in the second oil distribution plate 10 and connected to the second oil inlet 26 and the second oil outlet 27; and a second oil distribution window 29 that is connected to the second internal oil passage 28, opened on the second inner disc 11 and connected to the internal cavity 3 or the external cavity 6; a one-way valve 33 is provided at each of the second oil inlet 26 and the second oil outlet 27, and the oil can be pumped out through the second oil inlet 26, the second internal oil passage 28, the second oil distribution window 29, the second internal oil passage 28 and the second oil outlet 27 in sequence.

[0036] like Figure 1 As shown, the oscillating pump housing 1 is provided with a housing oil inlet that communicates with both the first oil inlet 22 and the second oil inlet 26, and a housing oil outlet that communicates with both the first oil outlet 23 and the second oil outlet 27. The housing oil inlet and housing oil outlet have the same structure, but are located at different positions on the oscillating pump housing 1.

[0037] Figure 8 The figure shows the principle diagram of the oil pumping method designed based on the flexible blade swing pump of the present invention. The working process is:

[0038] First, the motor drives the shaft 2 through a coupling. The shaft 2 is splined to the inner helical disk 12, and the shaft 2 and the inner helical disk 12 rotate synchronously. The inner snap 17 is engaged with the helical boss 20 of the helical disk 12. When the inner helical disk 12 rotates, the inner snap 17 can achieve radial movement, causing the flexible blade 4 to deform. The drive gear 31 engages with the arcuate rack 30 on the outer helical disk 13, and the outer snap 15 is engaged with the helical boss 20 of the outer helical disk 13. When the drive gear 31 rotates, it drives the outer helical disk 13 to rotate, causing the outer snap 15 to achieve radial displacement, increasing the rate of change of the volume of the internal cavity 3 of the flexible blade 4. The displacement of the oscillating pump can be controlled by controlling the speed and direction of the drive gear 31.

[0039] When the shaft 2 rotates clockwise, the volume of the internal cavity 3 of the flexible blade 4 increases, and the internal cavity 3 of the flexible blade 4 becomes an oil suction cavity. Oil suction is achieved through the one-way valve 33 at the first oil inlet 22, the first internal oil passage 24, and the first oil distribution window 25 connected to the internal cavity 3 (oil suction can also be achieved through the one-way valve 33 at the second oil inlet 22, the second internal oil passage 28, and the second oil distribution window 29 connected to the internal cavity 3). At the same time, the volume of the external cavity 6 is compressed, and the oil in the external cavity 6 is compressed through the second oil distribution window 29 connected to the external cavity 6, the second internal oil passage 28, and the one-way valve 33 at the second oil discharge port 27 (oil compression can also be achieved through the first oil distribution window 25 connected to the external cavity 6, the first internal oil passage 24, and the one-way valve 33 at the first oil discharge port 23). Conversely, when the shaft 2 rotates counterclockwise, the volume of the internal cavity 3 decreases, the internal cavity 3 becomes an oil pressure cavity, and the external cavity 6 becomes an oil suction cavity. Oil suction is achieved through the one-way valve 33 at the first oil inlet 22, the first internal oil channel 24 and the first oil distribution window 25 connected to the external cavity 6 (oil suction can also be achieved through the one-way valve 33 at the second oil inlet 22, the second internal oil channel 28 and the second oil distribution window 29 connected to the external cavity 6). At the same time, the volume of the internal cavity 3 is compressed, and the oil in the internal cavity 3 is compressed through the second oil distribution window 29 connected to the internal cavity 3, the second internal oil channel 28 and the one-way valve 33 at the second oil discharge port 27 (oil compression can also be achieved through the first oil distribution window 25 connected to the internal cavity 3, the first internal oil channel 24 and the one-way valve 33 at the first oil discharge port 23).

[0040] In summary, the present invention is based on the flexible blade 4, and a blade pulling mechanism is set in the swing pump. By pulling the flexible blade, the flexible blade 4 undergoes elastic deformation, changing the volume of the internal cavity 3, and the volume of the external cavity 6 also changes accordingly. By changing the volume of the internal cavity 3 or the external cavity 6, the oil suction and oil pumping functions are realized, with a simple structure, strong self-priming ability, smooth operation, low noise, and low cost. The assembly and disassembly of the swing pump are relatively simple and convenient, which facilitates maintenance and replacement of parts, reducing subsequent operating costs. The flexible blade 4 and the buckle are preferably connected by a dovetail groove structure, which is reliable and easy to assemble and disassemble. The number of flexible blades 4 is preferably an even number. Since the internal cavity 3 of each flexible blade 4 is connected when the oil is pressed, the pressure is equal, and therefore each flexible blade 4 exerts the same force on the rotating shaft 2. The forces on the same cross section of the rotating shaft 2 offset each other, and no additional bending moment is generated. The number of internal cavities 3 has little effect on flow pulsation.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the structure of the present invention in any form. Any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A flexible vane oscillating pump comprising an oscillating pump housing (1), a rotating shaft (2) having one end located inside the oscillating pump housing (1) and the other end extending out of the oscillating pump housing (1), characterized in that: A first oil inlet and outlet mechanism, a vane oil pumping mechanism, and a second oil inlet and outlet mechanism are coaxially arranged in the swing pump housing (1); the rotating shaft (2) coaxially passes through the first oil inlet and outlet mechanism, the vane oil pumping mechanism, and the second oil inlet and outlet mechanism; The vane oil pump mechanism comprises a flexible vane (4) having an internal cavity (3) and capable of elastically deforming by external force and changing the volume of the internal cavity (3); and a vane pulling mechanism connected to the flexible vane (4) and the rotating shaft (2) and capable of elastically deforming the flexible vane (4) by rotation of the rotating shaft (2); the flexible vane (4) is located in the placement cavity (5), and the portion of the placement cavity (5) where the flexible vane (4) is not arranged is an external cavity (6); The first oil supply and discharge mechanism includes a first oil supply and discharge passage that is in communication with the internal cavity (3) and the external cavity (6), and the second oil supply and discharge mechanism includes a second oil supply and discharge passage that is in communication with the internal cavity (3) and the external cavity (6).

2. The flexible blade oscillating pump according to claim 1, characterized in that: The first oil inlet and discharge mechanism comprises a first oil distribution plate (7) and a first inner disc (8) fixed coaxially with the first oil distribution plate (7); an inner ring (9) which is an integral structure with the first inner disc (8) is coaxially fixedly connected to the first inner disc (8); the second oil inlet and discharge mechanism comprises a second oil distribution plate (10) and a second inner disc (11) fixed coaxially with the second oil distribution plate (10); a side annular surface of the inner ring (9) facing the second inner disc (11) is in contact with a side disc surface of the second inner disc (11) facing the inner ring (9); the outer diameter of the inner ring (9) is smaller than the outer diameter of the second inner disc (11); the first inner disc (8), the inner ring (9) and the second inner disc (11) enclose the placement cavity (5).

3. The flexible blade oscillating pump according to claim 2, characterized in that: The blade pulling mechanism comprises an inner helical disc (12) coaxially fixedly mounted on the rotating shaft (2) and an outer helical disc (13) coaxially mounted at the connection between the inner ring (9) and the second inner disc (11); the outer helical disc (13) is axially positioned by the cooperation between the inner ring (9) and the second inner disc (11); and the flexible blade (4) is connected between the inner helical disc (12) and the outer helical disc (13) by a snap-fit.

4. The flexible blade oscillating pump according to claim 3, characterized in that: The outer helical disk (13) is coaxially sleeved and installed on the annular outer surface of the inner ring (9) close to the second inner disk (11), and a positioning boss (14) is provided on the annular outer surface of the inner ring (9) away from the second inner disk (11), which cooperates with the disk surface of the outer helical disk (13) away from the second inner disk (11). The buckle includes an outer buckle (15) connected to the outer helical disk (13), and the outer buckle (15) is positioned and installed between the outer helical disk (13) and the second inner disk (11). The inner ring (9) is provided with an outer buckle positioning groove (16) that cooperates with the outer buckle (15), and the outer buckle (15) can move in the outer buckle positioning groove (16) along the radial direction of the inner ring (9).

5. The flexible blade oscillating pump according to claim 3, characterized in that: The inner helical disc (12) is coaxially arranged in the middle of the first inner disc (8), and the inner helical disc (12) is located in the inner ring (9). The buckle includes an inner buckle group connected to the inner helical disc (12), and each group of inner buckles includes two inner buckles (17) respectively connected to the axial front and rear side surfaces of the inner helical disc (12). The middle of the first inner disc (8) is provided with an inner buckle positioning groove (18) that cooperates with the inner buckle (17). The inner buckle (17) can move in the inner buckle positioning groove (18) along the radial direction of the first inner disc (8).

6. The flexible blade oscillating pump according to claim 3, characterized in that: The flexible blade (4) comprises a blade shell (4.1) having an internal cavity (3) that is wide in the middle and narrow at both ends, and a snap-fit ​​connection portion (4.2) fixedly connected to both ends of the blade shell (4.1) and forming an integral structure with the blade shell (4.1).

7. The flexible blade oscillating pump according to claim 6, characterized in that: A buckle positioning groove (4.3) is provided in the buckle connecting portion (4.2); a buckle positioning portion (19) cooperating with the buckle positioning groove (4.3) is provided at one end of the buckle; the buckle positioning portion (19) is arranged in the buckle positioning groove (4.3); multi-layer annular spiral bosses (20) are provided on both the inner spiral disk (12) and the outer spiral disk (13); a spiral groove (21) cooperating with the spiral bosses (20) is provided at the other end of the buckle.

8. The flexible blade oscillating pump according to claim 2, characterized in that: The first oil inlet and outlet passages include a first oil inlet (22) and a first oil outlet (23) provided on the first oil distribution plate (7); a first internal oil passage (24) provided in the first oil distribution plate (7) and in communication with the first oil inlet (22) and the first oil outlet (23); and a first oil distribution window (25) in communication with the first internal oil passage (24), provided on the first inner disc (8), and in communication with the internal cavity (3) or the external cavity (6). The second oil inlet and outlet passages include a second oil inlet (26) and a second oil outlet (27) provided on the second oil distribution plate (10); a second internal oil passage (28) provided in the second oil distribution plate (10) and in communication with the second oil inlet (26) and the second oil outlet (27); and a second oil distribution window (29) provided on the second inner disc (11) and in communication with the internal cavity (3) or the external cavity (6), which is in communication with the second internal oil passage (28). The oscillating pump housing (1) is provided with a housing oil inlet communicating with the first oil inlet (22) or the second oil inlet (26) and a housing oil outlet communicating with the first oil outlet (23) or the second oil outlet (27).

9. The flexible blade oscillating pump according to claim 3, characterized in that: A pulling reinforcement mechanism for reinforcing the pulling effect of the blades is also provided in the oscillating pump housing (1), the pulling reinforcement mechanism comprising an arc-shaped rack (30) fixedly mounted on the outer helical disc (13) and arranged along the circumferential direction of the outer helical disc (13), and a driving gear (31) meshing with the arc-shaped rack (30).

10. An oil pumping method for a flexible vane swing pump according to any one of claims 1 to 9, characterized in that: The drive shaft (2) rotates, and the shaft (2) drives the blade pulling mechanism to move, thereby changing the volume of the internal cavity (3), sucking oil through the oil inlet of the first oil inlet and discharge oil passage or the oil inlet of the second oil inlet and discharge oil passage, and the oil passes through the first oil inlet and discharge oil passage or the second oil inlet and discharge oil passage, and is pumped out through the oil outlet of the first oil inlet and discharge oil passage or the oil outlet of the second oil inlet and discharge oil passage.

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