Rotating disc type multi-cavity plunger pump

Abstract

The invention provides a rotating disc type multi-cavity plunger pump. The rotating disc type multi-cavity plunger pump comprises a curved surface rotating disc, a rotating driving mechanism, a piston cylinder, a piston rod, a spring, an input valve plate, an output valve plate, a box body, a piston support, a valve plate support and a bottom cover, one surface, close to the piston bracket, of the curved turntable is provided with a convex part and a concave part, the rotary driving mechanism is in transmission connection with the curved turntable, the piston cylinder is arranged on the piston bracket, the valve plate bracket is provided with an input hole and an output hole, one end of the piston rod is in contact with the curved turntable, and the spring is positioned between the piston rod and the valve plate bracket. According to the rotating disc type multi-cavity plunger pump, the curved surface rotating disc is arranged, one face of the curved surface rotating disc is provided with the convex part and the concave part, and in the rotating process of the curved surface rotating disc, the piston rod makes contact with the convex part or the concave part through circulating switching, so that the piston rod slides in the piston cylinder, and the piston rod has a larger and more efficient lifting stroke; the output efficiency is high, the flow is large and stable, and fluid conveying can be completed faster and more efficiently.

Description

Technical Field

[0001] The invention relates to the field of pumps, and in particular to a rotary disc type multi-cavity plunger pump. Background Art

[0002] The working principle of the plunger pump is mainly based on the reciprocating motion of the plunger in the cylinder body, and the suction and discharge of liquid or gas is achieved by changing the volume of the sealed working chamber. Among them, the plunger pump in the prior art, such as the "A swash plate, valve distribution micro plunger pump" in the reference publication number CN202410096595.9, sucks oil through a slotted swash plate and discharges oil through a flat distribution valve, outputting flow and pressure. However, in this structure, since the sliding shoe contacts the swash plate at different positions to make the through-hole plunger reciprocate, the inclined surface of the swash plate changes smoothly and slightly, resulting in low efficiency and small flow rate for the through-hole plunger to drive the output.

[0003] Therefore, it is necessary to provide a rotary disc multi-cavity plunger pump to solve the above technical problems. Summary of the invention

[0004] The invention provides a rotary disc type multi-cavity plunger pump to solve the problems of low output efficiency and small flow rate of the plunger pump in the prior art.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a rotary disc type multi-chamber plunger pump, which includes a box body, a piston bracket, a valve plate bracket and a bottom cover which are stacked in sequence, and also includes:

[0006] A curved turntable is rotatably disposed in the box body and located between the box body and the piston support, and a convex portion and a concave portion are disposed on a side of the curved turntable close to the piston support;

[0007] A rotary drive mechanism is arranged outside the box, and an output end of the rotary drive mechanism extends into the box and is drivingly connected to the curved turntable;

[0008] A piston cylinder is arranged on the piston support, and the valve plate support is provided with an input hole and an output hole communicating with the inner cavity of the piston cylinder;

[0009] A piston rod is slidably disposed in the piston cylinder, one end of the piston rod is in contact with the curved turntable, and during the rotation of the curved turntable, the piston rod contacts the convex portion or the concave portion through cyclic switching, so that the piston rod slides in the piston cylinder;

[0010] A spring, disposed in the piston cylinder and located between the piston rod and the valve plate bracket;

[0011] An input valve sheet, which is closed and arranged on a side of the input hole close to the piston cylinder, and is used to prevent the fluid in the piston cylinder from being output to the outside through the input hole; and

[0012] The output valve sheet is closed and arranged on a side of the output hole away from the piston cylinder, and is used to prevent external fluid from being input into the piston cylinder through the output hole.

[0013] In the present invention, the convex portion is an arc-shaped protrusion, the concave portion is an arc-shaped depression, and the convex portion and the concave portion are smoothly connected.

[0014] In the present invention, the rotary disc type multi-chamber plunger pump comprises a plurality of the piston cylinders, the number of the piston cylinders is an even number, the total number of the convex portions and the concave portions is equal to the number of the piston cylinders, and the number of the convex portions and the concave portions is equal, the plurality of the convex portions and the plurality of the concave portions are equidistantly distributed in a ring shape around the central axis of the curved rotary disc, the plurality of the convex portions and the plurality of the concave portions are cross-distributed with each other, and the positions of the plurality of the piston cylinders correspond one-to-one to the positions of the convex portions and the concave portions.

[0015] Among them, the valve plate bracket and the bottom cover are connected to form a transfer chamber, and a spacer is arranged on the valve plate bracket, and the spacer divides the transfer chamber into an input chamber and an output chamber, and the input holes connected by the multiple piston cylinders are all connected to the input chamber, and the output holes connected by the multiple piston cylinders are all connected to the output chamber, and the bottom cover is provided with an input pipe connected to the input chamber and an output pipe connected to the output chamber.

[0016] In the present invention, the rotary disc type multi-chamber plunger pump also includes a roller, which is connected to one end of the piston rod close to the curved rotary disc, and the roller is in rolling contact with the curved rotary disc. During the rotation of the curved rotary disc, the roller cyclically switches to contact with the convex portion or the concave portion, so that the piston rod slides in the piston cylinder.

[0017] Among them, one end of the piston rod is provided with a mounting groove and a mounting hole, the mounting hole is arranged along the radial direction of the piston rod, and the axial center line of the mounting hole is located at the intersection of the axial center line of the curved turntable, the mounting groove and the mounting hole are mutually penetrated, the roller is arranged in the mounting groove, the center of the roller passes through and is rotatably connected with a connecting shaft, the aperture of the mounting hole is larger than the outer diameter of the connecting shaft, and the two ends of the connecting shaft are elastically and movably connected to the mounting hole through elastic parts, so that the roller contacts different positions of the convex part and the concave part through deflection adaptation.

[0018] Furthermore, the elastic member includes a cylindrical portion, a first elastic folded piece located at both axial ends of the cylindrical portion, and a second elastic folded piece located at one axial end of the cylindrical portion, the connecting shaft is sleeved in the cylindrical portion, the first elastic folded piece is bent and extended toward the outer peripheral side of the cylindrical portion, the first elastic folded piece is in contact with the inner wall surface of the mounting hole, the first elastic folded piece is bent and extended toward the outer peripheral side of the cylindrical portion, and the second elastic folded piece is in contact with the side wall of the roller.

[0019] In the present invention, the turntable-type multi-chamber plunger pump also includes a ball, which is connected to one end of the piston rod close to the curved turntable. The ball is in rolling contact with the curved turntable. During the rotation of the curved turntable, the ball cyclically switches to contact with the convex portion or the concave portion, so that the piston rod slides in the piston cylinder.

[0020] Among them, the rotary disc type multi-chamber plunger pump also includes a ball sleeve, which is threadedly connected to the end of the piston rod close to the curved rotary disc, and the inner cavity of the ball sleeve passes through both ends along the axial direction of the ball sleeve. The ball is arranged in the ball sleeve, and the ball extends out of the ball sleeve to contact the curved rotary disc.

[0021] In the present invention, the output end of the rotation drive mechanism is connected to the curved turntable through a transmission mechanism, and the transmission mechanism includes a ring gear, a driving sun gear, and a driven planetary gear. The ring gear is arranged on the inner wall surface of the box body, and the driving sun gear is connected to the output end of the rotation drive mechanism. A plurality of driven planetary gears are connected between the ring gear and the driving sun gear. A connecting column is arranged on the curved turntable, and the driven planetary gear is rotatably connected to the connecting column.

[0022] Compared with the prior art, the present invention has the following beneficial effects: the turntable-type multi-cavity plunger pump of the present invention is provided with a curved turntable, and one side of the curved turntable is provided with a convex portion and a concave portion. During the rotation of the curved turntable, the piston rod contacts the convex portion or the concave portion through cyclic switching, so that the piston rod slides in the piston cylinder. The piston rod has a larger and more efficient lifting stroke, high output efficiency, large and stable flow rate, and can complete fluid transportation faster and more efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. The drawings described below are only drawings corresponding to some embodiments of the present invention.

[0024] Figure 1 It is a schematic diagram of the exploded structure of the rotary disc type multi-cavity plunger pump of the present invention.

[0025] Figure 2 It is a schematic cross-sectional structural diagram of the rotary disc type multi-cavity plunger pump of the present invention.

[0026] Figure 3 It is a schematic structural diagram of the piston rod of the rotary disc type multi-cavity plunger pump of the present invention.

[0027] Figure 4 It is a partial structural schematic diagram of the piston rod connecting the roller of the rotary disc type multi-chamber plunger pump of the present invention.

[0028] Figure 5 It is a partial structural schematic diagram of the piston rod connecting the ball of the rotary disc type multi-cavity plunger pump of the present invention. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0030] The directional terms mentioned in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "side", "top" and "bottom", are only for reference to the orientation of the drawings. The directional terms used are used to illustrate and understand the present invention, but not to limit the present invention.

[0031] The terms "first", "second", etc. in the present invention are used for descriptive purposes only and should not be understood as indicating or implying relative importance, and should not be used as a limitation on the order of precedence.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense. For example, the connection can be a detachable connection or a connection of an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] The plunger pump in the prior art outputs flow and pressure by driving the plunger to reciprocate through a swash plate. The inclined surface of the swash plate changes gently and slightly, resulting in low efficiency and small flow of the through-hole plunger to drive the output.

[0034] The following is an embodiment of a rotary disc type multi-cavity plunger pump provided by the present invention that can solve the above technical problems.

[0035] Please refer to Figure 1 and Figure 2 ,in Figure 1 It is a schematic diagram of the exploded structure of the rotary disc type multi-cavity plunger pump of the present invention. Figure 2 It is a schematic cross-sectional structural diagram of the rotary disc type multi-cavity plunger pump of the present invention.

[0036] In the figures, structurally similar elements are denoted by the same reference numerals.

[0037] This embodiment provides a rotary disc type multi-chamber plunger pump, which includes a box body 11, a piston support 12, a valve plate support 13 and a bottom cover 14 which are stacked in sequence. It also includes a curved rotary disc 15, a rotary drive mechanism 16, a piston cylinder 17, a piston rod 18, a spring 19, an input valve plate 134, and an output valve plate 135.

[0038] The curved turntable 15 is rotatably disposed in the box body 11 and is located between the box body 11 and the piston bracket 12 . A convex portion 151 and a concave portion 152 are disposed on a surface of the curved turntable 15 close to the piston bracket 12 .

[0039] The rotary drive mechanism 16 is disposed outside the housing 11 , and an output end of the rotary drive mechanism 16 extends into the housing 11 and is transmission-connected to the curved turntable 15 . The rotary drive mechanism 16 is used for driving the curved turntable 15 to rotate.

[0040] The piston cylinder 17 is arranged on the piston support 12 , and the valve plate support 13 is provided with an input hole 131 and an output hole 132 which are connected to the inner cavity of the piston cylinder 17 .

[0041] The piston rod 18 is slidably arranged in the piston cylinder 17, and one end of the piston rod 18 contacts the curved turntable 15. During the rotation of the curved turntable 15, the piston rod 18 contacts the convex portion 151 or the concave portion 152 through cyclic switching, so that the piston rod 18 slides in the piston cylinder 17. The large height difference between the convex portion 151 or the concave portion 152 can drive the piston rod 18 to slide quickly and efficiently in the piston cylinder 17. The piston rod 18 has a larger and more efficient lifting stroke, high output efficiency, large and stable flow rate, and can complete fluid transportation faster and more efficiently.

[0042] It should be noted that a rod head 185 is provided at one end of the piston rod, a connecting groove 1831 is provided around the rod head 185, a sealing ring 186 is provided in the connecting groove 1831, and the rod head 185 slides in the piston cylinder 17, forming a sliding seal with the inner wall of the piston cylinder 17 through the sealing ring 186.

[0043] The spring 19 is disposed in the piston cylinder 17 and is located between the piston rod 18 and the valve plate bracket 13 . The spring can keep the piston rod 18 in contact with the curved turntable 15 at all times.

[0044] The input valve plate 134 is closed and disposed on a side of the input hole 131 close to the piston cylinder 17 , and is used to prevent the fluid in the piston cylinder 17 from being output to the outside through the input hole 131 , thereby forming a one-way seal.

[0045] The output valve plate 135 is closed and disposed on a side of the output hole 132 away from the piston cylinder 17 , and is used to prevent external fluid from being input into the piston cylinder 17 through the output hole 132 , thereby forming a one-way seal.

[0046] The input valve plate 134 and the output valve plate 135 may both be umbrella-shaped valve plates.

[0047] In this embodiment, the convex portion 151 is an arc-shaped convexity, and the concave portion 152 is an arc-shaped concaveity. The convex portion 151 and the concave portion 152 are smoothly connected, so that the piston rod 18 can smoothly perform cyclic switching contact between the convex portion 151 and the concave portion 152.

[0048] In this embodiment, the rotary disk type multi-chamber plunger pump includes a plurality of piston cylinders 17, the number of piston cylinders 17 is an even number, the total number of convex parts 151 and concave parts 152 is equal to the number of piston cylinders 17, and the number of convex parts 151 and concave parts 152 is equal, the plurality of convex parts 151 and the plurality of concave parts 152 are distributed in an annular manner and equidistantly around the central axis of the curved rotary disk 15, the plurality of convex parts 151 and the plurality of concave parts 152 are distributed crosswise with each other, and the positions of the plurality of piston cylinders 17 correspond one by one to the positions of the convex parts 151 and the concave parts 152. In this way, when half of the piston rods 18 are driven to slide input, the other half of the piston rods 18 are driven to slide output, and the plurality of piston rods 18 can perform two complete slides for each rotation of the curved rotary disk 15, and the conveying efficiency is high.

[0049] Please refer to Figure 2 , wherein the valve plate support 13 and the bottom cover 14 are connected to form a transfer chamber, a spacer 133 is provided on the valve plate support 13, and the spacer 133 divides the transfer chamber into an input chamber 143 and an output chamber 144, and the input holes 131 connected by the multiple piston cylinders 17 are all connected to the input chamber 143, and the output holes 132 connected by the multiple piston cylinders 17 are all connected to the output chamber 144, and the bottom cover 14 is provided with an input pipe 141 connected to the input chamber 143, and an output pipe 142 connected to the output chamber 144. Moreover, when it is necessary to control the flow and load, the flow and load can be simply controlled by changing the number of piston rods 18.

[0050] The piston rod 18 can directly slide in contact with the curved turntable 15, but the wear will be very large. Optionally, the turntable multi-chamber plunger pump can include a roller 181, which is connected to the end of the piston rod 18 close to the curved turntable 15, and the roller 181 rolls in contact with the curved turntable 15. During the rotation of the curved turntable 15, the roller 181 cyclically switches to contact with the convex portion 151 or the concave portion 152, so that the piston rod 18 slides in the piston cylinder 17. By setting the roller 181 to roll in contact with the curved turntable 15, the wear is reduced and the service life is long.

[0051] For details, please refer to Figure 3 One end of the piston rod 18 is provided with a mounting groove 183 and a mounting hole 184. The mounting hole 184 is arranged along the radial direction of the piston rod 18, and the axial center line of the mounting hole 184 is located at the intersection of the axial center line of the curved turntable 15. The mounting groove 183 and the mounting hole 184 are mutually penetrated, and the roller 181 is arranged in the mounting groove 183. The center of the roller 181 penetrates and is rotatably connected with a connecting shaft 182. The aperture of the mounting hole 184 is larger than the outer diameter of the connecting shaft 182. Both ends of the connecting shaft 182 are elastically and movably connected to the mounting hole 184 through an elastic member 1B, so that the roller 181 contacts different positions of the convex portion 151 and the concave portion 152 through deflection adaptation. Since the path of the roller 181 switching contact between the convex portion 151 and the concave portion 152 is not linear, the elastic member 1B is provided so that the roller 181 can be adaptively deflected according to the actual contact situation with the curved turntable 15, thereby further reducing the wear between the roller 181 and the curved turntable 15 and extending the service life.

[0052] Please refer to Figure 4 , wherein the elastic member 1B includes a barrel portion 1B1, a first elastic flap 1B2 located at both axial ends of the barrel portion 1B1, and a second elastic flap 1B3 located at one axial end of the barrel portion 1B1, and the first elastic flap 1B2 and the second elastic flap 1B3 located at the same end of the barrel portion 1B1 are staggered. The connecting shaft 182 is sleeved in the barrel portion 1B1, the first elastic flap 1B2 is bent and extended toward the outer peripheral side of the barrel portion 1B1, the first elastic flap 1B2 contacts the inner wall surface of the mounting hole 184, the first elastic flap 1B2 is bent and extended toward the outer peripheral side of the barrel portion 1B1, and the second elastic flap 1B3 contacts the side wall of the roller 181. The elastic member 1B can take into account the connection between the connecting shaft 182 and the mounting hole 184, and the connection between the connecting shaft 182 and the roller 181, so that the roller 181 can be stably and elastically connected to the piston rod 18.

[0053] Please refer to Figure 5Optionally, the rotary disc type multi-chamber piston pump may further include a ball 187, that is, the roller 181 is replaced with a ball 187, the ball 187 is connected to the end of the piston rod 18 close to the curved rotary disc 15, the ball 187 is in rolling contact with the curved rotary disc 15, and during the rotation of the curved rotary disc 15, the ball 187 cyclically switches to contact with the convex portion 151 or the concave portion 152, so that the piston rod 18 slides in the piston cylinder 17. The wear between the ball 187 and the curved rotary disc 15 is small, and the service life is longer.

[0054] Among them, the turntable multi-chamber plunger pump also includes a ball sleeve 188, which is threadedly connected to the end of the piston rod 18 close to the curved turntable 15. The inner cavity of the ball sleeve 188 passes through both ends along the axial direction of the ball sleeve 188. The ball 187 is arranged in the ball sleeve 188, and the ball 187 extends in the ball sleeve 188 to contact the curved turntable 15, which is convenient for disassembly and assembly.

[0055] Please refer to Figure 1 In this embodiment, the output end of the rotation drive mechanism 16 is connected to the curved turntable 15 through a transmission mechanism. The transmission mechanism includes a ring gear 1A1, a driving sun gear 1A2, and a driven planetary gear 1A3. The ring gear 1A1 is arranged on the inner wall surface of the housing 11, the driving sun gear 1A2 is connected to the output end of the rotation drive mechanism 16, and a plurality of driven planetary gears 1A3 are connected between the ring gear 1A1 and the driving sun gear 1A2. A connecting column is arranged on the curved turntable 15, and the driven planetary gear 1A3 is rotatably connected to the connecting column.

[0056] The rotary drive mechanism 16 in this embodiment is a motor. The rotary drive mechanism 16 drives the active sun gear 1A2 to rotate, and the plurality of driven planetary gears 1A3 rotate together with the active sun gear 1A2, so that the curved turntable 15 rotates.

[0057] The working principle of the present invention is as follows: a convex portion 151 and a concave portion 152 are provided on one side of the curved turntable 15. When the rotary drive mechanism 16 drives the curved turntable 15 to rotate, the piston rod 18 will cyclically switch to contact with the convex portion 151 or the concave portion 152. There is a large drop between the convex portion 151 and the concave portion 152, so that the piston rod 18 can slide quickly and efficiently in the piston cylinder 17. The piston rod 18 has a larger and more efficient lifting stroke. The piston rod 18 slides back and forth so that the fluid enters the piston cylinder 17 from the input hole 131, and then is output from the piston cylinder 17 through the output hole 132. The output efficiency is high, the flow rate is large and stable, and the fluid transportation can be completed faster and more efficiently.

[0058] This completes the process of conveying fluid by the rotary disc multi-cavity plunger pump of this embodiment.

[0059] The turntable multi-chamber plunger pump of this embodiment is provided with a curved turntable, and one side of the curved turntable is provided with a convex portion and a concave portion. During the rotation of the curved turntable, the piston rod contacts the convex portion or the concave portion through cyclic switching, so that the piston rod slides in the piston cylinder. The piston rod has a larger and more efficient lifting stroke, high output efficiency, large and stable flow rate, and can complete fluid transportation faster and more efficiently.

[0060] In summary, although the present invention has been disclosed as above by embodiments, the above embodiments are not intended to limit the present invention. A person skilled in the art may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the scope defined in the claims.

Claims

1. A rotary disc multi-chamber plunger pump, characterized in that: It includes a box body, a piston bracket, a valve plate bracket and a bottom cover which are stacked in sequence, and also includes: A curved turntable is rotatably disposed in the box body and located between the box body and the piston support, and a convex portion and a concave portion are disposed on a side of the curved turntable close to the piston support; A rotary drive mechanism is arranged outside the box, and an output end of the rotary drive mechanism extends into the box and is drivingly connected to the curved turntable; A piston cylinder is arranged on the piston support, and the valve plate support is provided with an input hole and an output hole communicating with the inner cavity of the piston cylinder; A piston rod is slidably disposed in the piston cylinder, one end of the piston rod is in contact with the curved turntable, and during the rotation of the curved turntable, the piston rod contacts the convex portion or the concave portion through cyclic switching, so that the piston rod slides in the piston cylinder; A spring, disposed in the piston cylinder and located between the piston rod and the valve plate bracket; An input valve sheet, which is closed and arranged on a side of the input hole close to the piston cylinder, and is used to prevent the fluid in the piston cylinder from being output to the outside through the input hole; and The output valve sheet is closed and arranged on a side of the output hole away from the piston cylinder, and is used to prevent external fluid from being input into the piston cylinder through the output hole.

2. The rotary disc type multi-chamber plunger pump according to claim 1, characterized in that: The convex part is an arc-shaped protrusion, the concave part is an arc-shaped depression, and the convex part and the concave part are smoothly connected.

3. The rotary disc type multi-chamber plunger pump according to claim 1, characterized in that: The rotary disc type multi-chamber plunger pump comprises a plurality of the piston cylinders, the number of the piston cylinders is an even number, the total number of the convex portions and the concave portions is equal to the number of the piston cylinders, and the number of the convex portions and the concave portions are equal, the plurality of the convex portions and the plurality of the concave portions are equidistantly distributed in a ring shape around the central axis of the curved rotary disc, the plurality of the convex portions and the plurality of the concave portions are cross-distributed with each other, and the positions of the plurality of the piston cylinders correspond one-to-one to the positions of the convex portions and the concave portions.

4. The rotary disc type multi-chamber plunger pump according to claim 3, characterized in that: The valve plate bracket and the bottom cover are connected to form a transfer chamber, a spacer is arranged on the valve plate bracket, the spacer divides the transfer chamber into an input chamber and an output chamber, the input holes connected by the multiple piston cylinders are all connected to the input chamber, the output holes connected by the multiple piston cylinders are all connected to the output chamber, and the bottom cover is provided with an input pipe connected to the input chamber and an output pipe connected to the output chamber.

5. The rotary disc type multi-chamber plunger pump according to any one of claims 1 to 4, characterized in that: The rotary disc type multi-chamber plunger pump also includes a roller, which is connected to one end of the piston rod close to the curved rotary disc, and the roller is in rolling contact with the curved rotary disc. During the rotation of the curved rotary disc, the roller cyclically switches to contact with the convex portion or the concave portion, so that the piston rod slides in the piston cylinder.

6. The rotary disc type multi-chamber plunger pump according to claim 5, characterized in that: One end of the piston rod is provided with a mounting groove and a mounting hole, the mounting hole is arranged along the radial direction of the piston rod, and the axial center line of the mounting hole is located at the intersection of the axial center line of the curved turntable, the mounting groove and the mounting hole are mutually penetrated, the roller is arranged in the mounting groove, the center of the roller passes through and is rotatably connected with a connecting shaft, the aperture of the mounting hole is larger than the outer diameter of the connecting shaft, and the two ends of the connecting shaft are elastically and movably connected to the mounting hole through elastic parts, so that the roller contacts different positions of the convex part and the concave part through deflection adaptation.

7. The rotary disc type multi-chamber plunger pump according to claim 6, characterized in that: The elastic member includes a cylindrical portion, a first elastic folded piece located at both axial ends of the cylindrical portion, and a second elastic folded piece located at one axial end of the cylindrical portion, the connecting shaft is sleeved in the cylindrical portion, the first elastic folded piece is bent and extended toward the outer peripheral side of the cylindrical portion, the first elastic folded piece is in contact with the inner wall surface of the mounting hole, the first elastic folded piece is bent and extended toward the outer peripheral side of the cylindrical portion, and the second elastic folded piece is in contact with the side wall of the roller.

8. The rotary disc type multi-chamber plunger pump according to any one of claims 1 to 4, characterized in that: The rotary disc type multi-chamber plunger pump also includes a ball, which is connected to one end of the piston rod close to the curved rotary disc. The ball is in rolling contact with the curved rotary disc. During the rotation of the curved rotary disc, the ball cyclically switches to contact with the convex part or the concave part, so that the piston rod slides in the piston cylinder.

9. The rotary disc type multi-chamber plunger pump according to claim 8, characterized in that: The rotary disc type multi-chamber plunger pump also includes a ball sleeve, which is threadedly connected to one end of the piston rod close to the curved rotary disc, the inner cavity of the ball sleeve passes through both ends along the axial direction of the ball sleeve, the ball is arranged in the ball sleeve, and the ball extends out of the ball sleeve to contact the curved rotary disc.

10. The rotary disc type multi-chamber plunger pump according to claim 1, characterized in that: The output end of the rotation drive mechanism is connected to the curved turntable through a transmission mechanism, and the transmission mechanism includes a ring gear, a driving sun gear, and a driven planetary gear. The ring gear is arranged on the inner wall surface of the box body, and the driving sun gear is connected to the output end of the rotation drive mechanism. A plurality of driven planetary gears are connected between the ring gear and the driving sun gear. A connecting column is arranged on the curved turntable, and the driven planetary gear is rotatably connected to the connecting column.

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