Traveling wave pump

Abstract

The traveling wave pump comprises a pump body, the pump body is provided with a conveying cavity, a liquid inlet and a liquid outlet, the liquid inlet and the liquid outlet are used for medium input and output, and the liquid inlet and the liquid outlet are both communicated with the conveying cavity; the end cover is detachably connected to the pump body; the traveling wave rotor comprises a rotating body and traveling wave blades annularly distributed along the outer side face of the rotating body, when the rotating body drives the traveling wave blades to rotate along the conveying cavity, continuously and alternately changed volume cavities are formed among the rotating body, the traveling wave blades and the conveying cavity, and a medium sequentially and alternately enters the volume cavities from the liquid inlet; and the liquid is synchronously output through the liquid outlet, so that pulseless conveying of the medium is realized. According to the traveling wave pump, media can synchronously move in the volume cavities which continuously and alternately change in sequence, it can be guaranteed that the volume variation of each volume cavity is constant, pulseless conveying is achieved, meanwhile, operation is stable, noise generated when the traveling wave pump works can be reduced, frictional wear is reduced, the working efficiency is improved, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to a traveling wave pump. Background Technology

[0002] In the field of fluid pumps, positive displacement pumps (such as gear pumps, vane pumps, and piston pumps) play a crucial role in industrial hydraulics, chemical processes, precision metering, and medical equipment. However, these pumps have long been plagued by two inherent and interrelated technical challenges: significant output pulsation and frictional wear of key moving parts. These problems severely restrict the improvement of pump performance and the scope of their applications.

[0003] Output pulsation originates from the periodic, discontinuous changes in the pump chamber volume. When the working chamber is suddenly connected or disconnected from the inlet and outlet, the fluid flow rate and pressure will fluctuate periodically. This pulsation is transmitted throughout the pipeline system, causing vibration and noise, and polluting the working environment. In high-precision fluid transport or control systems (such as precision spraying and chromatographic analysis), pulsation directly interferes with process stability and result accuracy. Furthermore, continuous pulsation impacts can accelerate fatigue damage to pipelines and components, reducing the overall reliability of the system.

[0004] Wear primarily occurs on core moving parts such as the rotor, blades, and pump body. In traditional positive displacement pumps, line or surface contact designs are typically used to achieve a tight seal. Combined with sudden speed changes and impacts during operation, this leads to accelerated wear in areas of highest contact stress. Wear not only directly reduces the pump's volumetric efficiency and service life but also further exacerbates internal leakage due to increased clearances, causing performance degradation after long-term operation and an inability to maintain stable output pressure.

[0005] In existing technologies, external measures such as adding voltage regulators or optimizing inlet and outlet flow channels are commonly used to solve the pulsation problem, but this increases the system complexity and cost. To solve the wear problem, the use of wear-resistant materials or surface treatments is often relied upon, which fails to fundamentally change the undesirable dynamic characteristics. These improvement measures are often only temporary solutions and may even sacrifice structural compactness in order to reduce pulsation. Summary of the Invention

[0006] The purpose of this invention is to provide a traveling wave pump solution that addresses the shortcomings of existing technologies. This solution not only allows the medium to move synchronously in a continuously alternating volume chamber, but also ensures that the volume change of each volume chamber is constant, achieving pulsation-free delivery. Simultaneously, it ensures smooth operation, reduces noise during operation, minimizes friction and wear, improves working efficiency, and extends service life.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A traveling wave pump, comprising: The pump body is provided with a conveying chamber and an inlet and an outlet for medium input and output, both of which are connected to the conveying chamber. End cap, which is detachably connected to the pump body; Its features are: It also includes a traveling wave rotor, which comprises a rotating body and traveling wave blades arranged in a ring along the outer surface of the rotating body. When the rotating body drives the traveling wave blades to rotate along the conveying cavity, a continuously alternating volume cavity is formed between the rotating body, the traveling wave blades, and the conveying cavity. The medium enters the volume cavity sequentially from the inlet and exits synchronously from the outlet, achieving pulsation-free conveying of the medium. Through the design of the above structure, not only can the medium move synchronously in the continuously alternating volume cavity, but the volume change of each volume cavity can also be kept constant, achieving pulsation-free conveying. At the same time, the operation is smooth, which can reduce the noise of the traveling wave pump during operation, reduce friction and wear, improve working efficiency, and extend service life.

[0008] Furthermore, the traveling wave blades have an axisymmetric structure.

[0009] Furthermore, it also includes a blocking mechanism located within the pump body and end cover. The blocking mechanism is situated between the inlet and outlet and is axially clamped to the traveling wave blades. When the traveling wave rotor rotates, it separates the volumetric cavities between the inlet and outlet, enabling synchronous input and output of the medium. Through the design of the blocking mechanism, the volumetric cavities between the inlet and outlet can be separated. Since the medium has already been squeezed out, the volumetric cavity on the inlet side can draw in the medium from the inlet. The volumetric cavity on the outlet side, containing the medium, can be squeezed out by the rotation of the traveling wave rotor and output through the outlet. This allows for synchronous input and output of the medium, improving the medium delivery efficiency.

[0010] Furthermore, the blocking mechanism includes a limiting frame, a slider support frame, sliders, and an elastic element. The pump body and end cover are respectively provided with a first slicing groove and a second slicing groove. The limiting frame is connected to the first slicing groove and the second slicing groove. The limiting frame is provided with a sliding groove. The slider support frame moves back and forth along the sliding groove. The two sliders are connected to the inner side of the slider support frame through the elastic element. The ends of the sliders abut against the surface of the traveling wave blades. The limiting frame is fixedly installed in the first slicing groove and the second slicing groove, which plays a positioning role. Since the two sliders are in direct contact with the traveling wave blades of the traveling wave rotor, when the traveling wave blades push the two sliders to move, they can drive the slider support frame to move back and forth along the sliding groove on the limiting frame, ensuring that the volume cavity between the liquid inlet and the liquid outlet is separated. In the design, the hardness of the slider is less than that of the traveling wave blades. The slider is a consumable part. The elastic element can provide elastic compensation for the slider, so that the end of the slider always remains tangent to the traveling wave blades, meeting the input and output requirements of the medium. The elastic element can be a spring.

[0011] Furthermore, the pump body and end cover are respectively provided with a first flow channel and a second flow channel. Both the first flow channel and the second flow channel are connected to the delivery chamber. The inlet and the outlet are respectively connected to the first flow channel and the second flow channel on the same side. Since the traveling wave blade moves along the inner wall of the delivery chamber, the design of the first flow channel and the second flow channel can ensure that the medium can smoothly enter the volume chamber through the inlet and the first flow channel and the second flow channel during the process of the volume chamber starting to enter the blocking mechanism or the volume chamber completely leaving the blocking mechanism, or that the medium at the end of the volume chamber can smoothly enter the outlet through the first flow channel and the second flow channel for output, so that the change in the medium remains constant.

[0012] Furthermore, the pump body and the end cover are respectively provided with a first positioning cavity and a second positioning cavity, and the rotating body is rotatably connected to the first positioning cavity and the second positioning cavity. Through the design of the first positioning cavity and the second positioning cavity, the stability and reliability of the rotating body installation can be improved.

[0013] Furthermore, a sealing assembly is provided between the end cover and the pump body. The sealing assembly includes a sealing ring and a sealing groove on the pump body. The sealing ring is embedded in the sealing groove to achieve sealing when the end cover is connected to the pump body. Through the design of the sealing assembly, the gap between the end cover and the body can be sealed to prevent the medium in the conveying chamber from flowing out through the gap.

[0014] Furthermore, the pump body and the end cover are respectively provided with a first positioning hole and a second positioning hole, and a positioning pin is assembled between the first positioning hole and the second positioning hole. Through the design of the first positioning hole, the second positioning hole and the positioning pin, the assembly accuracy between the end cover and the pump body can be improved.

[0015] Furthermore, it also includes a rotating shaft, which is fixedly connected to the rotating body. The pump body and the end cover are respectively provided with a first bearing hole and a second bearing hole. The rotating shaft is connected to the first bearing hole and the second bearing hole through bearings, which can improve the stability and reliability of the rotating shaft installation.

[0016] Furthermore, it also includes a motor, which is connected to the shaft via a coupling.

[0017] The present invention, by adopting the above-described technical solution, has the following beneficial effects: 1. This invention not only enables the medium to move synchronously in a series of alternating volume chambers, but also ensures that the volume change of each volume chamber is constant, achieving pulsation-free delivery and smooth operation. It can also reduce the noise of the traveling wave pump during operation, reduce friction and wear, improve working efficiency, and extend service life.

[0018] 2. Through the design of the blocking mechanism, the volume chambers between the inlet and outlet can be separated. Since the medium has been squeezed out, the volume chamber on the inlet side can draw in the medium from the inlet. The volume chamber on the outlet side contains the medium. As the traveling wave rotor rotates, the medium in this volume chamber can be squeezed out and output through the outlet. This allows for synchronous input and output of the medium, improving the medium conveying efficiency. The limiting frame is fixedly installed in the first and second slicing grooves, serving a positioning function. Since the two sliders are in direct contact with the traveling wave blades of the traveling wave rotor, when the traveling wave blades push the two sliders to move, they can drive the slider support frame to reciprocate along the sliding groove on the limiting frame, ensuring that the volume chambers between the inlet and outlet are separated.

[0019] 3. By designing the first and second flow channels, it can be ensured that during the process of the volume cavity starting to enter the blocking mechanism or the volume cavity completely leaving the blocking mechanism, the medium can smoothly enter the volume cavity through the inlet via the first and second flow channels, or the medium at the end of the volume cavity can smoothly enter the outlet via the first and second flow channels, so that the change in the medium remains constant. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings: Figure 1 This is a rendering of a traveling wave pump according to the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 for Figure 1 The main view; Figure 4 for Figure 3 Schematic diagram of the structure in the AA direction; Figure 5 for Figure 3 Schematic diagram of the structure in the middle BB direction; Figure 6 This is a schematic diagram of the end cap structure in this invention; Figure 7 This is a schematic diagram of the pump body in this invention; Figure 8 This is a schematic diagram of the blocking mechanism in this invention; Figure 9 This is a schematic diagram of the traveling wave rotor in this invention; Figure 10 for Figure 9 A schematic diagram of the structure in the C-direction.

[0021] In the figure: 1-Pump body; 101-Inlet; 102-Outlet; 103-First slicing groove; 104-First bearing hole; 105-First positioning cavity; 106-Conveying cavity; 107-Sealing groove; 108-First flow channel groove; 109-First positioning hole; 2-End cap; 201-Second dicing groove; 202-Second bearing hole; 203-Second positioning cavity; 204-Second flow channel groove; 205-Second positioning hole; 3-Motor; 4-Inlet connector; 5-Outlet connector; 6-Traveling wave rotor; 601-Rotating body; 602-Traveling wave blade; 7-Blocking mechanism; 701-Limiting frame; 702-Slide groove; 703-Slider support frame; 704-Slider; 705-Elastic element; 8-Sealing ring; 9-Positioning pin; 10-Coupling; 11-Bearing; 12-Shaft. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0025] like Figures 1 to 10 As shown, a traveling wave pump of the present invention includes a pump body 1, an end cover 2, a traveling wave rotor 6, a rotating shaft 12 and a motor 3. The end cover 2 is detachably connected to the pump body 1, and the motor 3 is connected to the rotating shaft 12 through a coupling 10.

[0026] A sealing assembly is provided between the end cover 2 and the pump body 1. The sealing assembly includes a sealing ring 8 and a sealing groove 107 provided on the pump body 1. The sealing ring 8 is embedded in the sealing groove 107 to achieve sealing when the end cover 2 is connected to the pump body 1. Through the design of the sealing assembly, the gap between the end cover 2 and the body can be sealed to prevent the medium in the conveying chamber 106 from flowing out through the gap.

[0027] The pump body 1 and the end cover 2 are respectively provided with a first positioning hole 109 and a second positioning hole 205. A positioning pin 9 is assembled between the first positioning hole 109 and the second positioning hole 205. The design of the first positioning hole 109, the second positioning hole 205 and the positioning pin 9 can improve the assembly accuracy between the end cover 2 and the pump body 1.

[0028] The pump body 1 is provided with a conveying chamber 106 and an inlet 101 and an outlet 102 for medium input and output, and both the inlet 101 and the outlet 102 are connected to the conveying chamber 106.

[0029] The traveling wave rotor 6 includes a rotating body 601 and a traveling wave blade 602 that is distributed in a ring along the outer surface of the rotating body 601. The traveling wave blade 602 has an axisymmetric structure.

[0030] When the rotating body 601 drives the traveling wave blade 602 to rotate along the conveying cavity 106, a continuously alternating volume cavity is formed between the rotating body 601, the traveling wave blade 602 and the conveying cavity 106. The medium enters the volume cavity sequentially from the inlet 101 and is synchronously output from the outlet 102, realizing the pulsation-free conveying of the medium.

[0031] It also includes a blocking mechanism 7 located within the pump body 1 and end cover 2. The blocking mechanism 7 is situated between the inlet 101 and the outlet 102, and is axially clamped to the traveling wave blade 602. When the traveling wave rotor 6 rotates, it separates the volumetric cavities between the inlet 101 and the outlet 102, enabling synchronous input and output of the medium. Through the design of the blocking mechanism 7, the volumetric cavities between the inlet 101 and the outlet 102 can be separated. Since the medium has been squeezed out, the volumetric cavity on the inlet 101 side can be sucked in, while the volumetric cavity on the outlet 102 side, containing the medium, can be squeezed out as the traveling wave rotor 6 rotates and output through the outlet 102. This allows for synchronous input and output of the medium, improving the medium delivery efficiency.

[0032] The blocking mechanism 7 includes a limiting frame 701, a slider support frame 703, sliders 704, and an elastic element 705. The pump body 1 and the end cover 2 are respectively provided with a first slicing groove 103 and a second slicing groove 201. The limiting frame 701 is connected to the first slicing groove 103 and the second slicing groove 201. The limiting frame 701 is provided with a sliding groove 702. The slider support frame 703 reciprocates along the sliding groove 702. The two sliders 704 are connected to the inner side of the slider support frame 703 through the elastic element 705. The ends of the sliders 704 abut against the surface of the traveling wave blade 602. The limiting frame 701 is fixedly installed in the first slicing groove 103 and the second slicing groove 201, serving a positioning function. Since the two sliders 704 are in direct contact with the traveling wave blades 602 of the traveling wave rotor 6, when the traveling wave blades 602 push the two sliders 704 to move, they can drive the slider support frame 703 to move back and forth along the groove 702 on the limiting frame 701, ensuring that the volume cavity between the liquid inlet 101 and the liquid outlet 102 is separated. In the design, the hardness of the sliders 704 is less than that of the traveling wave blades 602. The sliders 704 are consumable parts. The elastic element 705 can provide elastic compensation for the sliders 704, so that the end of the sliders 704 always remains tangent to the traveling wave blades 602, meeting the requirements of medium input and output. The elastic element 705 can be a spring.

[0033] The pump body 1 and the end cover 2 are respectively provided with a first flow channel 108 and a second flow channel 204. The first flow channel 108 and the second flow channel 204 are both connected to the conveying chamber 106. The inlet 101 and the outlet 102 are respectively connected to the first flow channel 108 and the second flow channel 204 on the same side. Since the traveling wave blade 602 moves along the inner wall of the conveying chamber 106, the design of the first flow channel 108 and the second flow channel 204 can ensure that the medium can smoothly enter the volume chamber through the inlet 101 and the first flow channel 108 and the second flow channel 204 during the process of the volume chamber starting to enter the blocking mechanism 7 or the volume chamber completely leaving the blocking mechanism 7, or the medium at the end of the volume chamber can smoothly enter the outlet 102 for output through the first flow channel 108 and the second flow channel 204, so that the change in the medium remains constant.

[0034] The pump body 1 and the end cover 2 are respectively provided with a first positioning cavity 105 and a second positioning cavity 203. The rotating body 601 is rotatably connected to the first positioning cavity 105 and the second positioning cavity 203. Through the design of the first positioning cavity 105 and the second positioning cavity 203, the stability and reliability of the installation of the rotating body 601 can be improved.

[0035] The rotating shaft 12 is fixedly connected to the rotating body 601. The pump body 1 and the end cover 2 are respectively provided with a first bearing 11 hole 104 and a second bearing 11 hole 202. The rotating shaft 12 is connected to the first bearing 11 hole 104 and the second bearing 11 hole 202 through the bearings 11, which can improve the stability and reliability of the installation of the rotating shaft 12.

[0036] The above structural design not only allows the medium to move synchronously in the continuously alternating volume chambers, but also ensures that the volume change of each volume chamber is constant, achieving pulsation-free delivery and smooth operation. This reduces the noise of the traveling wave pump during operation, decreases friction and wear, improves working efficiency, and extends service life.

[0037] In actual operation, the present invention first connects the inlet connector 4 and the outlet connector 5 to the external pipeline, starts the motor 3, and drives the traveling wave rotor 6 to rotate, so that four volume chambers are formed in the traveling wave blade 602, the rotating body 601 and the conveying cavity 106. When the tangent of the traveling wave blade 602 is tangent to the inner wall of the end cover 2, the first volume chamber ① and the second volume chamber ② are formed and are located on the side close to the end cover 2. When the tangent of the traveling wave blade 602 is tangent to the inner wall of the conveying cavity 106, the third volume chamber ③ and the fourth volume chamber ④ are formed and are located on the side close to the motor 3. The first volume chamber ①, the third volume chamber ③, the second volume chamber ② and the fourth volume chamber ④ are alternately distributed along both sides of the traveling wave blade 602.

[0038] Taking the first volume chamber ① as an example, when the first volume chamber ① is directly above, the blocking mechanism 7 is clamped at the first volume chamber ① of the traveling wave blade 602. The first volume chamber ① is divided into two chambers. As the traveling wave rotor 6 continues to drive, the chamber of the first volume chamber ① near the liquid inlet 101 is connected to the liquid inlet 101 and begins to suck in the medium. At this time, the third volume chamber ③ is filled with the medium. The chamber of the first volume chamber ① near the liquid outlet 102 is connected to the liquid outlet 102. Because of the blocking mechanism 7, the medium in this chamber directly enters the liquid outlet 102 through the second flow channel groove 204 at the end cover 2 and is discharged. At the same time, the medium in the fourth volume chamber ④ begins to connect to the liquid outlet 102 and enters the liquid outlet 102 through the first flow channel groove 108 on the side of the pump body 1 and is discharged. When the traveling wave rotor 6 Figure 9 For example, after rotating 90° counterclockwise, the first volume chamber ① is filled with medium. The fourth volume chamber ④ sucks in and discharges the medium in the same way as the first volume chamber ①. As the traveling wave rotor 6 continues to drive, the chamber of the fourth volume chamber ④ near the inlet 101 is connected to the inlet 101 and begins to suck in the medium. At this time, the first volume chamber ① is filled with medium. The chamber of the fourth volume chamber ④ near the outlet 102 is connected to the outlet 102. Because of the obstruction of the blocking mechanism 7, the medium in this chamber directly enters the outlet 102 through the first flow channel groove 108 at the pump body 1 and is discharged. At the same time, the medium in the second volume chamber ② begins to connect to the outlet 102 and enters the outlet 102 through the second flow channel groove 204 on the side of the end cover 2 and is discharged. The traveling wave rotor 6 continues to rotate counterclockwise in the manner described above until the first volume chamber ①, the third volume chamber ③, the second volume chamber ②, and the fourth volume chamber ④ achieve continuous suction and discharge of the medium. This method not only allows the medium to move synchronously within the continuously alternating volume chambers, but also ensures a constant volume change in each volume chamber, achieving pulsation-free delivery. Simultaneously, it ensures smooth operation, reduces noise during pump operation, minimizes friction and wear, improves efficiency, and extends service life.

[0039] The above are merely specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on the present invention to achieve substantially the same technical effect are all covered within the protection scope of the present invention.

Claims

1. A traveling wave pump, comprising: The pump body is provided with a conveying chamber and an inlet and an outlet for medium input and output, and the inlet and the outlet are both connected to the conveying chamber; End cap, which is detachably connected to the pump body; Its features are: It also includes a traveling wave rotor, which includes a rotating body and traveling wave blades arranged in a ring along the outer surface of the rotating body. When the rotating body drives the traveling wave blades to rotate along the conveying cavity, a continuously alternating volume cavity is formed between the rotating body, the traveling wave blades and the inner wall of the conveying cavity. The medium enters the volume cavity sequentially from the inlet and exits synchronously from the outlet, realizing the pulsation-free conveying of the medium.

2. A traveling wave pump according to claim 1, characterized in that: The traveling wave blade has an axisymmetric structure.

3. A traveling wave pump according to claim 1, characterized in that: It also includes a blocking mechanism disposed in the pump body and the end cover. The blocking mechanism is located between the liquid inlet and the liquid outlet. The blocking mechanism clamps the traveling wave blade along the axial direction. When the traveling wave rotor rotates, it is used to separate the volume cavity between the liquid inlet and the liquid outlet to realize the synchronous input and output of the medium.

4. A traveling wave pump according to claim 3, characterized in that: The blocking mechanism includes a limiting frame, a slider support frame, a slider, and an elastic element. The pump body and the end cover are respectively provided with a first slicing groove and a second slicing groove. The limiting frame is connected to the first slicing groove and the second slicing groove. The limiting frame is provided with a sliding groove. The slider support frame moves back and forth along the sliding groove. The two sliders are connected to the inner side of the slider support frame through the elastic element. The end of the slider abuts against the surface of the traveling wave blade.

5. A traveling wave pump according to claim 4, characterized in that: The pump body and the end cover are respectively provided with a first flow channel groove and a second flow channel groove. The first flow channel groove and the second flow channel groove are both connected to the conveying chamber. The liquid inlet and the liquid outlet are respectively connected to the first flow channel groove and the second flow channel groove on the same side.

6. A traveling wave pump according to any one of claims 1 to 5, characterized in that: The pump body and the end cover are respectively provided with a first positioning cavity and a second positioning cavity, and the rotating body is rotatably connected to the first positioning cavity and the second positioning cavity.

7. A traveling wave pump according to any one of claims 1 to 5, characterized in that: A sealing assembly is provided between the end cap and the pump body. The sealing assembly includes a sealing ring and a sealing groove on the pump body. The sealing ring is embedded in the sealing groove to achieve sealing when the end cap is connected to the pump body.

8. A traveling wave pump according to any one of claims 1 to 5, characterized in that: The pump body and the end cover are respectively provided with a first positioning hole and a second positioning hole, and a positioning pin is assembled between the first positioning hole and the second positioning hole.

9. A traveling wave pump according to any one of claims 1 to 5, characterized in that: It also includes a rotating shaft, which is fixedly connected to the rotating body. The pump body and the end cover are respectively provided with a first bearing hole and a second bearing hole. The rotating shaft is connected to the first bearing hole and the second bearing hole respectively through bearings.

10. A traveling wave pump according to claim 9, characterized in that: It also includes a motor, which is connected to the shaft via a coupling.

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