Rotary multi-chamber plunger pump

Abstract

This invention provides a rotary multi-chamber piston pump, comprising a curved rotary disc, a rotary drive mechanism, a piston cylinder, a piston rod, a spring, an input valve plate, an output valve plate, and a housing, a piston support, a valve plate support, and a bottom cover stacked sequentially. The curved rotary disc has a protrusion and a recess on the side near the piston support. The rotary drive mechanism is connected to the curved rotary disc. The piston cylinder is mounted on the piston support. The valve plate support has an input port and an output port. One end of the piston rod contacts the curved rotary disc, and the spring is located between the piston rod and the valve plate support. This rotary multi-chamber piston pump, by using a curved rotary disc with a protrusion and a recess on one side, allows the piston rod to slide within the piston cylinder during rotation. This results in a larger and more efficient lifting stroke, high output efficiency, large and stable flow rate, and faster and more efficient fluid delivery.

Description

Technical Field

[0001] This invention relates to the field of pumps, and in particular to a rotary multi-chamber piston pump. Background Technology

[0002] The working principle of a plunger pump is mainly based on the reciprocating motion of a plunger in a cylinder, which changes the volume of the sealed working cavity to achieve the intake and discharge of liquids or gases. Existing plunger pumps, such as the "a swashplate and valve-distribution micro plunger pump" in publication CN202410096595.9, use a slotted swashplate for oil intake and a flat distribution valve for oil discharge to output flow and pressure. However, in this structure, because the through-hole plunger reciprocates through contact between the slipper and different positions on the swashplate, and the swashplate's slope changes gradually and minimally, the efficiency of the through-hole plunger in driving the output is low, resulting in a small flow rate.

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

[0004] This invention provides a rotary multi-chamber plunger pump to solve the problems of low output efficiency and small flow rate of existing plunger pumps.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is: a rotary multi-chamber piston pump, which includes a housing, a piston support, a valve plate support, and a bottom cover arranged in sequence, and further includes:

[0006] A curved turntable is rotatably disposed inside the housing and located between the housing and the piston support. The side of the curved turntable near the piston support is provided with a protrusion and a recess.

[0007] A rotary drive mechanism is disposed outside the housing, and the output end of the rotary drive mechanism extends into the housing and is connected to the curved turntable via a transmission.

[0008] A piston cylinder is mounted on the piston support, and the valve plate support is provided with an input port and an output port that communicate with the inner cavity of the piston cylinder;

[0009] A piston rod is slidably disposed inside the piston cylinder. One end of the piston rod is in contact with the curved turntable. During the rotation of the curved turntable, the piston rod alternately contacts the protrusion or the concave part, thereby causing the piston rod to slide inside the piston cylinder.

[0010] A spring is disposed inside the piston cylinder and located between the piston rod and the valve plate support;

[0011] An input valve plate, closed on the side of the input port near the piston cylinder, is used to prevent fluid inside the piston cylinder from being output to the outside through the input port; and

[0012] An output valve plate is closed on the side of the output port away from the piston cylinder to prevent external fluid from entering the piston cylinder through the output port.

[0013] In this invention, 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.

[0014] In this invention, the rotary multi-chamber piston pump includes a plurality of piston cylinders, the number of which is an even number. The total number of the protrusions and the recesses is equal to the number of piston cylinders, and the number of the protrusions and the recesses are equal. The plurality of protrusions and the plurality of recesses are distributed in a ring at equal intervals around the central axis of the curved rotary disk. The plurality of protrusions and the plurality of recesses are distributed intersectingly. The positions of the plurality of piston cylinders correspond one-to-one with the positions of the protrusions and the recesses.

[0015] The valve plate support and the bottom cover are connected to form a transfer cavity. A spacer ring is provided on the valve plate support, which divides the transfer cavity into an input cavity and an output cavity. The input holes of the multiple piston cylinders are all connected to the input cavity, and the output holes of the multiple piston cylinders are all connected to the output cavity. The bottom cover is provided with an input pipe connected to the input cavity and an output pipe connected to the output cavity.

[0016] In this invention, the rotary multi-chamber piston pump further includes a roller, which is connected to one end of the piston rod near the curved rotary disk. The roller makes rolling contact with the curved rotary disk. During the rotation of the curved rotary disk, the roller cyclically switches between contacting the convex part and the concave part, so that the piston rod slides in the piston cylinder.

[0017] The piston rod has a mounting groove and a mounting hole at one end. The mounting hole is arranged radially along the piston rod, and the axial center line of the mounting hole intersects with the axial center line of the curved turntable. The mounting groove and the mounting hole are interconnected. The roller is disposed in the mounting groove, and a connecting shaft is rotatably connected through the center of the roller. The diameter of the mounting hole is larger than the outer diameter of the connecting shaft. The two ends of the connecting shaft are elastically and movably connected to the mounting hole through elastic elements, so that the roller can adaptively contact different positions of the protrusion and the concave part through deflection.

[0018] Furthermore, the elastic element includes a cylindrical portion, first elastic flaps located at both axial ends of the cylindrical portion, and a second elastic flap located at one axial end of the cylindrical portion. The connecting shaft is sleeved inside the cylindrical portion. The first elastic flap bends and extends towards the outer periphery of the cylindrical portion. The first elastic flap contacts the inner wall surface of the mounting hole. The second elastic flap contacts the side wall of the roller.

[0019] In this invention, the rotary multi-chamber piston pump further includes ball bearings, which are connected to one end of the piston rod near the curved rotary disc. The ball bearings are in rolling contact with the curved rotary disc. During the rotation of the curved rotary disc, the ball bearings cyclically switch between contacting the convex portion or the concave portion, causing the piston rod to slide within the piston cylinder.

[0020] The rotary multi-chamber piston pump further includes a ball sleeve, which is threadedly connected to one end of the piston rod near the curved rotary disk. The inner cavity of the ball sleeve extends through both ends along the axial direction of the ball sleeve. The balls are disposed inside the ball sleeve and extend out of the ball sleeve to contact the curved rotary disk.

[0021] In this invention, the output end of the rotary drive mechanism is connected to the curved turntable via a transmission mechanism. The transmission mechanism includes a gear ring, a driving sun gear, and driven planetary gears. The gear ring is disposed on the inner wall of the housing. The driving sun gear is connected to the output end of the rotary drive mechanism. Multiple driven planetary gears are connected between the gear ring and the driving sun gear. A connecting column is disposed on the curved turntable, and the driven planetary gears are rotatably connected to the connecting column.

[0022] Compared with the prior art, the beneficial effects of this invention are as follows: The rotary multi-chamber piston pump of this invention is provided with a curved rotary disc, one side of which is provided with a convex part and a concave part. During the rotation of the curved rotary disc, the piston rod contacts the convex part or the concave part in a cycle, 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, and can complete fluid transportation faster and more efficiently. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments are briefly introduced below. The drawings described below are only the corresponding drawings of some embodiments of the present invention.

[0024] Figure 1 This is an exploded structural diagram of the rotary multi-chamber plunger pump of the present invention.

[0025] Figure 2 This is a cross-sectional view of the rotary multi-chamber plunger pump of the present invention.

[0026] Figure 3 This is a schematic diagram of the piston rod structure of the rotary multi-chamber plunger pump of the present invention.

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

[0028] Figure 5 This is a partial structural diagram of the piston rod connecting the ball bearings in the rotary multi-chamber plunger pump of the present invention. Detailed Implementation

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

[0030] The directional terms mentioned in this invention, such as "up", "down", "front", "back", "left", "right", "inner", "outer", "side", "top" and "bottom", are only for reference to the orientation of the accompanying drawings. The directional terms used are for the purpose of explaining and understanding this invention, and are not intended to limit this invention.

[0031] The terms "first" and "second" used in the terminology of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, nor as limiting the order of events.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, a 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; it can be a connection within two components or an interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In existing technology, plunger pumps use a swashplate to drive the plunger to reciprocate and output flow and pressure. The swashplate has a gentle and small slope, which makes the efficiency of driving the output by the through-hole plunger low and the flow rate small.

[0034] The following is an embodiment of a rotary multi-chamber plunger pump provided by the present invention, which can solve the above-mentioned technical problems.

[0035] Please refer to Figure 1 and Figure 2 ,in Figure 1 This is an exploded structural diagram of the rotary multi-chamber plunger pump of the present invention. Figure 2 This is a cross-sectional view of the rotary multi-chamber plunger pump of the present invention.

[0036] In the diagram, units with similar structures are represented by the same labels.

[0037] This embodiment provides a rotary multi-chamber piston pump, which includes a housing 11, a piston support 12, a valve support 13, and a bottom cover 14 arranged 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 134, and an output valve 135.

[0038] The curved turntable 15 is rotatably disposed inside the housing 11 and is located between the housing 11 and the piston support 12. The side of the curved turntable 15 near the piston support 12 is provided with a protrusion 151 and a recess 152.

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

[0040] The piston cylinder 17 is mounted on the piston support 12, and the valve plate support 13 is provided with an input hole 131 and an output hole 132 that communicate with the inner cavity of the piston cylinder 17.

[0041] The piston rod 18 is slidably disposed within the piston cylinder 17. One end of the piston rod 18 contacts the curved turntable 15. During the rotation of the curved turntable 15, the piston rod 18 alternately contacts the protrusion 151 or the concave part 152, causing the piston rod 18 to slide within the piston cylinder 17. The large drop between the protrusion 151 and the concave part 152 enables the piston rod 18 to slide quickly and efficiently within the piston cylinder 17. The piston rod 18 has a larger and more efficient lifting stroke, resulting in high output efficiency, large and stable flow rate, and faster and more efficient fluid delivery.

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

[0043] Spring 19 is disposed inside piston cylinder 17 and located between piston rod 18 and valve plate support 13. Spring ensures that piston rod 18 always remains in contact with curved turntable 15.

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

[0045] The output valve plate 135 is closed on the side of the output port 132 away from the piston cylinder 17, which is used to block external fluid from entering the piston cylinder 17 through the output port 132, forming a one-way seal.

[0046] Both the input valve plate 134 and the output valve plate 135 can be umbrella-shaped valve plates.

[0047] In this embodiment, the protrusion 151 is an arc-shaped protrusion and the concave part 152 is an arc-shaped recess. The protrusion 151 and the concave part 152 are smoothly connected, so that the piston rod 18 can smoothly switch contact between the protrusion 151 and the concave part 152.

[0048] In this embodiment, the rotary multi-chamber piston pump includes multiple piston cylinders 17, with an even number of cylinders. The total number of protrusions 151 and recesses 152 is equal to the number of piston cylinders 17, and the number of protrusions 151 and recesses 152 is also equal. The multiple protrusions 151 and recesses 152 are distributed in a ring at equal intervals around the central axis of the curved rotary disk 15, and are intersected with each other. The positions of the multiple piston cylinders 17 correspond one-to-one with the positions of the protrusions 151 and recesses 152. Thus, when half of the piston rods 18 slide and drive input, the other half slide and drive output. For each rotation of the curved rotary disk 15, the multiple piston rods 18 can perform two complete sliding operations, resulting in high conveying efficiency.

[0049] Please refer to Figure 2 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, dividing the transfer chamber into an input chamber 143 and an output chamber 144. The input ports 131 of the multiple piston cylinders 17 are all connected to the input chamber 143, and the output ports 132 of the multiple piston cylinders 17 are all connected to the output chamber 144. 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. Furthermore, when it is necessary to control the flow rate and load, the flow rate and load can be easily controlled by changing the number of piston rods 18.

[0050] The piston rod 18 can directly slide against the curved disc 15, but this results in significant wear. Optionally, the rotary multi-chamber piston pump may include a roller 181 connected to the end of the piston rod 18 near the curved disc 15. The roller 181 rolls against the curved disc 15, and during the rotation of the curved disc 15, the roller 181 cyclically switches between contact with the protrusion 151 and the concave part 152, allowing the piston rod 18 to slide within the piston cylinder 17. By setting the roller 181 to roll against the curved disc 15, wear is reduced and service life is extended.

[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 radially along the piston rod 18, and the axial center line of the mounting hole 184 intersects with the axial center line of the curved turntable 15. The mounting groove 183 and the mounting hole 184 are interconnected. The roller 181 is arranged in the mounting groove 183. The center of the roller 181 is rotatably connected to the connecting shaft 182. The diameter of the mounting hole 184 is larger than the outer diameter of the connecting shaft 182. The two ends of the connecting shaft 182 are elastically and movably connected to the mounting hole 184 through the elastic element 1B, so that the roller 181 can adaptively contact different positions of the protrusion 151 and the concave part 152 through deflection. Since the path of the roller 181 switching contact between the protrusion 151 and the concave part 152 is not linear, by setting the elastic element 1B, the roller 181 can adaptively deflect according to the actual contact with the curved turntable 15, thereby further reducing the wear between the roller 181 and the curved turntable 15 and extending its service life.

[0052] Please refer to Figure 4 The elastic element 1B includes a cylindrical portion 1B1, first elastic flaps 1B2 located at both axial ends of the cylindrical portion 1B1, and a second elastic flap 1B3 located at one axial end of the cylindrical portion 1B1. The first elastic flaps 1B2 and the second elastic flaps 1B3 located at the same end of the cylindrical portion 1B1 are offset. The connecting shaft 182 is sleeved inside the cylindrical portion 1B1. The first elastic flaps 1B2 bend and extend towards the outer periphery of the cylindrical portion 1B1, contacting the inner wall surface of the mounting hole 184. The second elastic flap 1B3 contacts the side wall of the roller 181. The elastic element 1B can accommodate both 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 multi-chamber piston pump may also include ball bearings 187, replacing the aforementioned rollers 181. The ball bearings 187 are connected to the end of the piston rod 18 near the curved rotary disc 15. The ball bearings 187 roll in contact with the curved rotary disc 15. During the rotation of the curved rotary disc 15, the ball bearings 187 cyclically switch between contact with the protrusions 151 and the recesses 152, causing the piston rod 18 to slide within the piston cylinder 17. This results in less wear between the ball bearings 187 and the curved rotary disc 15, leading to a longer service life.

[0054] The rotary multi-chamber piston pump also includes a ball sleeve 188, which is threaded to one end of the piston rod 18 near the curved rotary disk 15. The inner cavity of the ball sleeve 188 extends through both ends along the axial direction of the ball sleeve 188. The balls 187 are disposed inside the ball sleeve 188 and extend out of the ball sleeve 188 to contact the curved rotary disk 15, making disassembly and assembly convenient.

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

[0056] In this embodiment, the rotary drive mechanism 16 is a motor. The rotary drive mechanism 16 drives the active sun gear 1A2 to rotate, and the multiple driven planetary gears 1A3 will rotate together with the active sun gear 1A2, causing the curved turntable 15 to rotate.

[0057] The working principle of this invention is as follows: One side of the curved turntable 15 is provided with a protrusion 151 and a concave part 152. During the rotation of the curved turntable 15 driven by the rotary drive mechanism 16, the piston rod 18 will cyclically switch between contacting the protrusion 151 or the concave part 152. There is a large drop between the protrusion 151 and the concave part 152, which allows 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. The back and forth sliding of the piston rod 18 allows the fluid to enter the piston cylinder 17 from the input port 131, and then be output from the piston cylinder 17 through the output port 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 fluid delivery using a rotary multi-chamber plunger pump as described in this embodiment.

[0059] The rotary multi-chamber piston pump of this embodiment features a curved rotary disc with a protrusion and a concave side. During the rotation of the rotary disc, the piston rod alternately contacts the protrusion or the concave side, allowing the piston rod to slide within the piston cylinder. This results in a larger and more efficient lifting stroke for the piston rod, leading to high output efficiency, large and stable flow, and faster and more efficient fluid delivery.

[0060] In summary, although the present invention has been disclosed above with reference to embodiments, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A rotary multi-cavity plunger pump characterized by, Including a box body, piston support, valve plate support, and bottom cover arranged in sequence, and also including: A curved turntable is rotatably disposed inside the housing and located between the housing and the piston support. The side of the curved turntable near the piston support is provided with a protrusion and a recess. A rotary drive mechanism is disposed outside the housing, and the output end of the rotary drive mechanism extends into the housing and is connected to the curved turntable via a transmission. A piston cylinder is mounted on the piston support, and the valve plate support is provided with an input port and an output port that communicate with the inner cavity of the piston cylinder; A piston rod is slidably disposed inside the piston cylinder. One end of the piston rod is in contact with the curved turntable. During the rotation of the curved turntable, the piston rod alternately contacts the protrusion or the concave part, thereby causing the piston rod to slide inside the piston cylinder. A spring is disposed inside the piston cylinder and located between the piston rod and the valve plate support; An input valve plate, closed on the side of the input port near the piston cylinder, is used to prevent fluid inside the piston cylinder from being output to the outside through the input port; and An output valve plate is closed off on the side of the output port away from the piston cylinder to prevent external fluid from entering the piston cylinder through the output port; A roller is connected to one end of the piston rod near the curved turntable; One end of the piston rod is provided with a mounting groove and a mounting hole. The mounting hole is arranged radially along the piston rod, and the axial center line of the mounting hole intersects with the axial center line of the curved turntable. The mounting groove and the mounting hole are interconnected. The roller is arranged in the mounting groove, and a connecting shaft is rotatably connected through the center of the roller. The diameter of the mounting hole is larger than the outer diameter of the connecting shaft. The two ends of the connecting shaft are elastically and movably connected to the mounting hole through elastic elements. The elastic element includes a cylindrical portion, a first elastic flap located at both axial ends of the cylindrical portion, and a second elastic flap located at one axial end of the cylindrical portion. The connecting shaft is sleeved inside the cylindrical portion. The first elastic flap bends and extends towards the outer periphery of the cylindrical portion. The first elastic flap contacts the inner wall surface of the mounting hole, and the second elastic flap contacts the side wall of the roller.

2. The rotary multi-chamber plunger pump according to claim 1, characterized in that, The convex part is an arc-shaped protrusion, and the concave part is an arc-shaped depression, with a smooth connection between the convex part and the concave part.

3. The rotary multi-chamber plunger pump according to claim 1, characterized in that, The rotary multi-chamber piston pump includes multiple piston cylinders, the number of which is an even number. The total number of protrusions and concave parts is equal to the number of piston cylinders, and the number of protrusions and concave parts is equal. The multiple protrusions and multiple concave parts are distributed in a ring at equal intervals around the central axis of the curved rotary disk. The multiple protrusions and multiple concave parts are distributed intersectingly. The positions of the multiple piston cylinders correspond one-to-one with the positions of the protrusions and the concave parts.

4. The rotary multi-chamber plunger pump according to claim 3, characterized in that, The valve plate support and the bottom cover are connected to form a transfer cavity. A spacer ring is provided on the valve plate support, which divides the transfer cavity into an input cavity and an output cavity. The input holes of the multiple piston cylinders are all connected to the input cavity, and the output holes of the multiple piston cylinders are all connected to the output cavity. The bottom cover is provided with an input pipe connected to the input cavity and an output pipe connected to the output cavity.

5. The rotary multi-chamber plunger pump according to claim 1, characterized in that, The roller makes rolling contact with the curved turntable. During the rotation of the curved turntable, the roller alternately contacts the convex part or the concave part, causing the piston rod to slide inside the piston cylinder.

6. The rotary multi-chamber plunger pump according to claim 1, characterized in that, The output end of the rotary drive mechanism is connected to the curved turntable via a transmission mechanism. The transmission mechanism includes a gear ring, a driving sun gear, and driven planetary gears. The gear ring is disposed on the inner wall of the housing. The driving sun gear is connected to the output end of the rotary drive mechanism. Multiple driven planetary gears are connected between the gear ring and the driving sun gear. A connecting column is disposed on the curved turntable, and the driven planetary gears are rotatably connected to the connecting column.

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