A vortex pump with low operating noise

Abstract

The application relates to the field of vortex pumps, in particular to a vortex pump with low operation noise. The vortex pump comprises a power device and a pumping assembly, the pumping assembly comprises a pump shell, a middle rotating shaft and an impeller, an inner cavity is formed in the pump shell, a middle part of the inner cavity is coaxially expanded outward along the axial direction of the pump shell, an annular cavity which is communicated with the inner cavity is formed, the middle rotating shaft is coaxially and rotatably inserted into the pump shell and connected with the power device, the impeller is arranged in the inner cavity of the pump shell and sleeved on the middle rotating shaft, an annular flow channel is formed between the impeller and the annular cavity, the impeller can slide along the axial direction of the middle rotating shaft and synchronously rotate with the middle rotating shaft, and elastic pushing structures are arranged on the left and right sides of the impeller in the pump shell. When sundries are sandwiched between the impeller and the pump shell, the impeller can slide along the axial direction of the middle rotating shaft under the pushing action of the sundries, the rotating resistance of the impeller can be reduced through the movement of the impeller, the operation noise is reduced, the abrasion between the impeller and the pump shell is reduced, and the service life of the impeller is prolonged.

Description

Technical Field

[0001] This invention relates to the field of vortex pumps, and more specifically to a vortex pump with low operating noise. Background Technology

[0002] Vortex pumps, also known as vortex pumps, are a type of impeller pump that achieves high-head, low-flow-rate transport through a unique fluid dynamics design, making them particularly suitable for transporting corrosive media in chemical and pharmaceutical industries. When the impeller of a vortex pump rotates, the liquid between the blades forms a "ring-shaped flow" under centrifugal force. Simultaneously, the liquid in the flow channel generates "longitudinal vortices" as the impeller advances. The superposition of these two forces causes the liquid to repeatedly enter and exit the impeller blades, gaining an energy increment each time it passes through the impeller, ultimately achieving high-pressure output. Vortex pumps can be divided into closed-loop and open-loop types based on impeller design. Closed-loop vortex pumps have an intermediate baffle and require an open flow channel; they have higher efficiency (35%-45%) but lack self-priming capability and have poor cavitation performance. Open-loop vortex pumps have no baffle and, when used with a closed flow channel, possess self-priming capability and can handle gas-liquid mixtures.

[0003] Existing vortex pumps have a small gap between the pump body and the impeller. When pumping liquids containing particles, impurities enter between the blades and the casing, which increases the impeller's rotational resistance and increases operating noise. At the same time, the inclusion of impurities causes severe wear on the blades, which may affect the normal operation of the pump and limit the application range of vortex pumps.

[0004] The information disclosed in the background section of this invention is intended only to enhance the understanding of the general background of this invention and should not be construed as an admission or in any way implying that such information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention proposes a low-noise vortex pump to solve the problems of high operating noise and easy blade wear in existing vortex pumps.

[0006] The present invention provides a low-noise vortex pump, which includes a power unit and a pumping assembly.

[0007] The pumping components include:

[0008] The pump casing is hollow inside, forming an inner cavity. Along the axial direction of the pump casing, an annular cavity coaxially expands outward from the center of the inner cavity and communicates with it. The pump casing is provided with an inlet and an outlet that communicate with the annular cavity.

[0009] An intermediate rotating shaft, which is coaxial and rotatable, is inserted into the pump casing and connected to the output shaft of the power unit;

[0010] The impeller is located in the inner cavity of the pump casing and is coaxially sleeved on the intermediate rotating shaft. Several radial blades are provided on both the left and right sides of the outer edge of the impeller, and an annular flow channel is formed between the impeller and the annular cavity.

[0011] The impeller can slide axially along the central shaft and rotate synchronously with the central shaft; elastic jacking structures are provided on both the left and right sides of the impeller inside the pump casing. The elastic jacking structures are configured to keep the impeller in the center position of the annular cavity in the initial state and reset it after the impeller moves.

[0012] Optionally, the elastic push structure includes a contact steel ball and an elastic element. The pump casing is provided with mounting holes on both sides of the impeller. The contact steel ball is slidably disposed in the mounting hole. The elastic element is disposed in the mounting hole and acts on the contact steel ball. The elastic element is configured such that the contact steel ball abuts against the impeller.

[0013] Optionally, a ball seat is provided in the mounting hole, the steel ball is mounted on the ball seat and is hinged to the ball seat, and the elastic element is connected to the ball seat.

[0014] Optionally, a screw is threaded into the mounting hole, and the end of the elastic element away from the ball seat is connected to the screw.

[0015] Optionally, a baffle is provided inside the pump casing, which divides the inner cavity into a main cavity and an regulating cavity. The intermediate shaft and impeller are located in the main cavity. Several water passage holes are evenly distributed around the circumference of the baffle. The regulating cavity is connected to a clean water source. An auxiliary blade is provided on the end face of the impeller near the regulating cavity. The auxiliary blade is evenly distributed around the circumference and located inside the radial blade. The auxiliary blade forms an angle with the radial direction of the impeller.

[0016] Optionally, a sealing plate is rotatably installed inside the regulating cavity, and a number of regulating holes are evenly distributed around the circumference of the sealing plate. The number and shape of the regulating holes are adapted to the water passage holes.

[0017] An adjustment structure is provided inside the adjustment cavity. The adjustment structure is configured to convert the movement of the impeller into the rotation of the sealing plate, and the rotation angle of the sealing plate is positively correlated with the movement frequency of the impeller.

[0018] Optionally, the adjusting structure includes a first piston, a second piston, and an intermediate connecting member;

[0019] A piston cylinder is located at the center of the partition. Both the first piston and the second piston are slidably disposed on the piston cylinder. The first piston and the second piston divide the piston cylinder into a left chamber, a middle chamber, and a right chamber. The left chamber is located between the first piston and the piston cylinder and is connected to the main cavity of the pump housing. A first connecting hole is provided on the first piston. The first connecting hole connects the left chamber and the middle chamber. A one-way valve is provided in the first connecting hole. The one-way valve is configured to allow liquid to flow from the left chamber to the middle chamber.

[0020] The intermediate connecting piece is rotatably connected to the first piston and fixedly connected to the impeller. As the impeller slides along the intermediate rotating shaft, it drives the first piston to slide. During the sliding process of the first piston, the liquid in the main chamber of the pump casing is drawn into the intermediate chamber.

[0021] The second piston is provided with a second connecting hole, which connects the middle chamber and the right chamber. The liquid inside the right chamber can be discharged outward through a one-way valve. The second piston is spirally connected to the sealing plate, and thus drives the sealing plate to rotate when it moves. A return spring is provided between the second piston and the pump housing.

[0022] Optionally, a seal is provided on the intermediate shaft. The seal is fixedly connected to the pump casing and rotatably connected to the intermediate shaft. The seal seals the end of the pump casing near the power unit.

[0023] Optionally, the pump housing includes a first housing and a second housing, which are snap-fitted together and detachably connected.

[0024] Optionally, the power unit is a drive motor, the output shaft of which is connected to the intermediate rotating shaft, and the drive motor is an axial flux motor.

[0025] The beneficial effects of the present invention are as follows: When debris is trapped between the impeller and the pump casing, the impeller can slide axially along the intermediate shaft under the pushing action of the debris. The movement of the impeller can reduce the rotational resistance of the impeller, reduce the operating noise and the wear between the impeller and the pump casing, and extend the service life of the impeller.

[0026] Furthermore, by setting auxiliary blades on the impeller and connecting the pump casing to a clean water source, clean water can be drawn into the pump casing and discharged from the outlet when the impeller rotates, preventing impurities from entering the gap between the impeller and the pump casing, thus further reducing impeller wear.

[0027] Furthermore, by adjusting the component settings, the pumping rate of purified water can be adjusted according to the amount of impurities in the liquid, effectively preventing impurities from slowing down impeller wear while also ensuring the pumping efficiency of the vortex pump. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the overall structure of a low-noise vortex pump according to the present invention.

[0030] Figure 2 for Figure 1 Side view;

[0031] Figure 3 This is a schematic diagram of the pumping assembly in this invention;

[0032] Figure 4 for Figure 3 A cross-sectional three-dimensional view;

[0033] Figure 5 for Figure 3 The front view;

[0034] Figure 6 for Figure 5 Sectional view of AA;

[0035] Figure 7 for Figure 3 Side view;

[0036] Figure 8 for Figure 7 BB section view;

[0037] Figure 9 This is an exploded view of the pumping assembly in this invention;

[0038] Figure 10 for Figure 8 Enlarged view of point C in the middle.

[0039] In the picture:

[0040] 100. Power unit;

[0041] 200. Pumping assembly; 201. Intermediate shaft; 202. Inlet; 203. Outlet; 204. First housing; 2041. Water passage hole; 205. Second housing; 206. Threaded joint; 207. Sealing plate; 208. Impeller; 2081. Radial blade; 2082. Auxiliary blade; 209. Screw; 210. Abutment steel ball; 211. Second piston; 212. First piston; 213. Intermediate connector; 214. Seal; 215. Elastic element; 220. Pump casing. Detailed Implementation

[0042] 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.

[0043] like Figures 1 to 10As shown in the figure, an embodiment of the present invention provides a low-noise vortex pump, which includes a power unit 100 and a pumping assembly 200, wherein the pumping assembly 200 includes a pump casing 220, an intermediate shaft 201 and an impeller 208.

[0044] The pump casing 220 is hollow, thus forming an inner cavity. Along the axial direction of the pump casing 220, an annular cavity coaxially expands outward from the center of the inner cavity and communicates with it. The pump casing 220 is provided with an inlet 202 and an outlet 203 communicating with the annular cavity. An intermediate rotating shaft 201 is coaxially and rotatably inserted into the pump casing 220 and connected to the output shaft of the power unit 100, so that it can rotate under the drive of the power unit 100.

[0045] Impeller 208 is disposed within the inner cavity of pump casing 220 and coaxially sleeved on intermediate rotating shaft 201. Several radial blades 2081 are provided on both the left and right sides of the outer edge of impeller 208, forming an annular flow channel between impeller 208 and the annular cavity. Driven by intermediate rotating shaft 201, impeller 208 rotates at high speed, generating centrifugal force. Liquid enters from inlet 202 and is pumped out from outlet 203 under the rotation of impeller 208. As the liquid flows through the radial blades 2081 within the annular flow channel, it forms a longitudinal vortex motion. Each time the liquid flows through the radial blades 2081, it gains energy superposition, producing a "liquid spiral propulsion" effect, thereby achieving low-flow-rate, high-head liquid pumping. To form the annular flow channel, annular grooves are provided on both the left and right sides of the annular cavity wall. These annular grooves block the flow at inlet 202 and outlet 203. The radial blades 2081 are located within the annular cavity and enclose the annular grooves to form the annular flow channel.

[0046] It is understandable that when existing vortex pumps pump liquids containing solid particles or fibrous impurities, these particles or impurities become trapped between the impeller 208 and the side wall of the annular cavity. This can easily increase the rotational resistance of the impeller 208, resulting in significant operating noise. At the same time, the inclusion of impurities can cause severe wear on the impeller 208, affecting its lifespan. When there are many impurities, they can clog the annular cavity, potentially causing the vortex pump to stop and affecting normal operation. Therefore, vortex pumps have poor adaptability to liquids containing impurities, limiting their applicable range.

[0047] Therefore, in this embodiment, the impeller 208 can slide axially along the intermediate rotating shaft 201 and rotate synchronously with the intermediate rotating shaft 201. The pump casing 220 is provided with elastic pushing structures on both the left and right sides of the impeller 208. The elastic pushing structures are configured such that the impeller 208 is kept in the center position of the annular cavity in the initial state and is reset after the impeller 208 moves.

[0048] In this embodiment, the impeller 208 is configured to move along the intermediate shaft 201. When impurity particles in the fluid are trapped in the gap between the impeller 208 and the annular cavity, the impeller 208 can slide along the intermediate shaft under the push of the impurities. When the impurity particles fall into the inner cavity of the pump casing 220 or are pumped out with the liquid, the impeller 208 resets under the action of the elastic push structure. This avoids increased operating noise and impeller 208 wear caused by impurity trapping, resulting in lower operating noise of the vortex pump and improved service life. This allows the vortex pump to be used for liquids containing solid particles, expanding its application range. It is understood that the width of the annular cavity limits the movement limit position of the impeller 208. That is, when the impeller 208 is centered, the gap between it and the two sides of the annular cavity meets the operating requirements of the vortex pump, ensuring that the liquid can run reliably in the annular flow channel and avoiding liquid backflow.

[0049] In a further embodiment, the elastic pushing structure includes an abutting steel ball 210 and an elastic element 215. The pump housing 220 is provided with mounting holes on both sides of the impeller 208. The abutting steel ball 210 is slidably disposed in the mounting hole. The elastic element 215 is disposed in the mounting hole and acts on the abutting steel ball 210. The elastic element 215 is configured such that the abutting steel ball 210 abuts against the impeller 208. The elastic element 215 is preferably a spring.

[0050] In this embodiment, the impeller 208 is initially positioned in the middle of the annular cavity thanks to the elastic element 215 and the abutting steel ball 210. When impurities are trapped in the gap between the impeller 208 and the annular cavity, the impeller 208 presses against the elastic element 215 on the corresponding side, causing it to slide along the central shaft 201, reducing operating noise and mitigating wear on the impeller 208 caused by impurities. When impurities fall into the inner cavity of the pump casing 220 or are pumped out with the liquid, the impeller 208 resets under the action of the elastic element 215.

[0051] Furthermore, to facilitate the installation of the abutting steel ball 210, a ball seat is provided in the mounting hole, the abutting steel ball 210 is set in the ball seat and is ball-hinged with the ball seat, and the elastic element 215 is connected to the ball seat.

[0052] The solution in this embodiment is to hinge the abutting steel ball 210 to the ball seat, so that when the impeller 208 rotates, it rolls and rubs against the abutting steel ball 210, thereby reducing the friction between the steel ball and the impeller 208.

[0053] Furthermore, a screw 209 is threaded into the mounting hole, and the end of the elastic element 215 away from the ball seat is connected to the screw 209.

[0054] The solution in this embodiment facilitates the installation and disassembly of the elastic element 215 and the abutting steel ball 210 by setting screws 209 in the mounting hole, which is beneficial for maintenance and repair. At the same time, by changing the position of screws 209 in the mounting hole, the initial compression of the elastic element 215 can be easily adjusted, thereby adjusting the abutting force of the abutting steel ball 210 on the impeller 208.

[0055] In a further embodiment, a partition is provided inside the inner cavity of the pump casing 220, which divides the inner cavity into a main cavity and an adjustment cavity. The intermediate rotating shaft 201 and the impeller 208 are located in the main cavity. A plurality of water passage holes 2041 are evenly distributed around the circumference of the partition. The adjustment cavity is connected to a clean water source. An auxiliary blade 2082 is provided on the end face of the impeller 208 near the adjustment cavity. The auxiliary blade 2082 is set at an angle to the radial direction of the impeller 208. The auxiliary blade 2082 is evenly distributed around the circumference and located inside the radial blade 2081.

[0056] In this embodiment, by setting auxiliary blades 2082 on the impeller 208 and connecting the pump casing 220 to the purified water source, when the impeller 208 rotates, the purified water from the purified water source can be drawn through the water passage 2041 to the pump casing 220 and discharged from the outlet 203, preventing impurities from entering the gap between the impeller 208 and the pump casing 200, and further reducing the wear of the impeller 208.

[0057] In a further embodiment, a blocking plate 207 is rotatably disposed within the regulating cavity. The blocking plate 207 has a plurality of regulating holes evenly distributed around its circumference, the number and shape of which are adapted to the water passage hole 2041. An regulating structure is provided within the regulating cavity, configured to convert the movement of the impeller 208 into the rotation of the blocking plate 207, and the rotation angle of the blocking plate 207 is positively correlated with the movement frequency of the impeller 208.

[0058] In this embodiment, initially, the water passage 2041 and the adjustment hole are misaligned. When impurities are trapped between the impeller 208 and the annular cavity, causing the impeller 208 to slide along the intermediate shaft 201, the sealing plate 207 rotates under the action of the adjustment structure, making the water passage 2041 and the adjustment hole connected. The more impurity particles in the liquid, the higher the frequency of the impeller 208's movement, the greater the angle of rotation of the sealing plate 207, the larger the area of ​​the water passage 2041 and the adjustment hole connected, the greater the pumping volume of clean water, and the better the effect of blocking impurities. While effectively preventing impurities from entering the pump casing 220, the efficiency of the vortex pump is also taken into account.

[0059] Furthermore, the adjustment structure includes a first piston 212, a second piston 211, and an intermediate connector 213. A piston cylinder is disposed at the center of the partition. Both the first piston 212 and the second piston 211 are slidably disposed on the piston cylinder. The first piston 212 and the second piston 211 divide the piston cylinder into a left chamber, an intermediate chamber, and a right chamber. The left chamber is located between the first piston 212 and the piston cylinder and is connected to the main chamber of the pump housing 220. A first connecting hole is disposed on the first piston 212. The first connecting hole connects the left chamber and the intermediate chamber. A one-way valve is disposed in the first connecting hole. The one-way valve is configured to allow liquid to flow from the left chamber to the intermediate chamber. That is, the one-way valve ensures that liquid can only flow from the left chamber to the intermediate chamber through the first connecting hole.

[0060] The intermediate connector 213 is rotatably connected to the first piston 212 and fixedly connected to the impeller 208. When the impeller 208 slides along the intermediate rotating shaft 201, it drives the first piston 212 to slide. During the sliding process of the first piston 212, the liquid in the main chamber of the pump casing 220 is drawn into the intermediate chamber.

[0061] The second piston 211 is provided with a second connecting hole, which connects the intermediate chamber and the right chamber. The second piston 211 is spirally connected to the sealing plate 207, and thus drives the sealing plate 207 to rotate when it moves. When the water inflow into the intermediate chamber is greater than the water outflow from the second connecting hole, the second piston 211 slides away from the first piston 212. When the second piston 211 moves, it drives the sealing plate 207 to rotate through the spiral drive, so that the water passage 2041 and the regulating hole are connected, and the water passage 2041 is opened. The higher the movement frequency of the impeller 208, the higher the corresponding movement frequency of the first piston 212, the greater the water inflow into the intermediate chamber, the greater the distance the second piston 211 moves, the greater the rotation angle of the sealing plate 207, the larger the area connected between the water passage 2041 and the regulating hole, and the larger the opening of the water passage 2041.

[0062] Specifically, the piston rod of the second piston 211 is a screw rod, and a mating cylinder is coaxially fixedly connected to one end face of the sealing plate 207. The mating cylinder is rotatably sleeved on the outside of the piston cylinder. A screw hole is provided on the end plate of the mating cylinder, and the screw hole is screwed into the piston rod of the second piston 211.

[0063] Furthermore, a return spring (not shown in the figure) is provided between the second piston 211 and the pump housing 220 to reset the second piston 211.

[0064] Furthermore, to facilitate the movement of the second piston 211, the right chamber is configured such that the liquid inside is discharged outward through a one-way valve. In other words, the right chamber is connected to the outside of the piston cylinder via a one-way valve, allowing the liquid inside to be discharged. Based on the above embodiment with the matching cylinder, the side wall of the right chamber has an opening, and the matching cylinder has a water outlet hole connected to the opening. The water outlet hole is connected to a drain pipe (not shown in the figure), thereby discharging the liquid inside the right chamber. In other embodiments, a filter screen can be installed at the inlet of the left chamber. The water outlet hole of the matching cylinder connects the right chamber and the regulating chamber. Because the liquid entering the piston cylinder is filtered by the filter screen, the liquid inside the piston cylinder contains fewer impurities and can be directly discharged into the regulating chamber. It is then pumped to the main chamber of the pump housing 220 along with clean water and flows out from the outlet 203, preventing impurities from entering the pump housing 220.

[0065] In a further embodiment, a threaded connector 206 is detachably connected to one end of the pump housing 220 near the regulating chamber.

[0066] The solution in this embodiment facilitates pipe connection by setting a threaded connector 206, thereby facilitating connection to a purified water source.

[0067] In a further embodiment, a seal 214 is provided on the intermediate rotating shaft 201. The seal 214 is fixedly connected to the pump housing 220 and rotatably connected to the intermediate rotating shaft 201. The seal 214 seals the end of the pump housing 220 near the power unit 100.

[0068] Furthermore, for ease of installation and disassembly, the pump casing 220 includes a first casing 204 and a second casing 205. The first casing 204 and the second casing 205 are fastened together and detachably connected, facilitating maintenance of the vortex pump. In this embodiment, the impeller 208 is slidably connected to the intermediate shaft 201. Compared to the prior art method of mounting the impeller 208 on the intermediate shaft 201 via an interference fit, this method makes disassembly and installation of the impeller 208 more convenient for maintenance or replacement. Preferably, the first casing 204 and the second casing 205 can be detachably connected using bolts and nuts.

[0069] More specifically, refer to Figure 3 , Figure 7 and Figure 8 The second housing 205 is located near the power unit 100, and a partition is disposed on the first housing 204. The adjustment cavity is located in the first housing 204. After the second housing 205 and the first housing 204 are assembled, they form a main cavity and an annular cavity. Two elastic pushing structures are respectively disposed on the second housing 205 and the first housing 204.

[0070] In a further embodiment, the power unit 100 is a drive motor, and the output shaft of the drive motor is connected to the intermediate rotating shaft 201, thereby driving the intermediate rotating shaft 201 to rotate. Furthermore, the drive motor is an axial flux motor, which can employ a coreless design. Due to its low inductance characteristics and coreless structure, it can completely eliminate electromagnetic noise, achieving excellent quiet operation and further reducing the operating noise of the eddy current pump.

[0071] Based on the above embodiments, the usage principle and working process of the present invention are as follows:

[0072] When the power unit 100 is started, the drive motor drives the intermediate shaft 201 to rotate, and the intermediate shaft 201 drives the impeller 208 to rotate. Under the rotation of the impeller 208, the liquid is pumped in from the inlet 202 and flows out from the outlet 203, thus achieving high-lift pumping of the liquid.

[0073] When the liquid contains impurity particles, if these particles enter between the impeller 208 and the annular cavity, the impeller 208 slides relative to the intermediate shaft 201 under the pushing force of the particles, reducing operating resistance and thus lowering operating noise and wear on the impeller 208. When the impurities fall into the inner cavity of the pump casing 220 or are pumped out of the pump casing 220, the impeller 208 resets. If there are many impurities in the liquid, the impeller 208 shakes frequently. During the shaking process, the impeller 208 drives the first piston 212 to move left and right relative to the pump casing 220. The left and right movement of the first piston 212 pumps the liquid to the intermediate cavity between the second piston 211 and the first piston 212. When the amount of liquid pumped in is greater than the water output of the second connecting hole on the second piston 211, the second piston 211 moves to the right, and the liquid in the right cavity is discharged. The rightward movement of the second piston 211 drives the sealing plate 207 to rotate through the screw drive, connecting the water passage hole 2041 and the adjusting hole. Because the impeller 208 is close to the water passage hole 2041... An auxiliary blade 2082 is provided on the side. Under the action of the auxiliary blade 2082, clean water is pumped into the pump casing 220 through the water passage hole 2041 and discharged from the outlet 203 under the action of centrifugal force, which prevents impurity particles from entering between the impeller 208 and the pump casing 220. The more impurities there are, the more frequently the impeller 208 shakes, the larger the amount of liquid pumped into the intermediate chamber, the more the second piston 211 moves, the larger the opening of the water passage hole 2041, and the larger the flow rate of clean water pumped into the pump casing 220. Thus, the amount of clean water can be adaptively adjusted according to the amount of impurities, effectively preventing impurities from entering the pump casing 220 while taking into account the efficiency of the vortex pump.

[0074] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vortex pump having low operating noise, characterized by Includes power unit and pumping components; The pumping components include: The pump casing is hollow inside, forming an inner cavity. Along the axial direction of the pump casing, an annular cavity coaxially expands outward from the center of the inner cavity and communicates with it. The pump casing is provided with an inlet and an outlet that communicate with the annular cavity. An intermediate rotating shaft, which is coaxial and rotatable, is inserted into the pump casing and connected to the output shaft of the power unit; The impeller is located in the inner cavity of the pump casing and is coaxially sleeved on the intermediate rotating shaft. Several radial blades are provided on both the left and right sides of the outer edge of the impeller, and an annular flow channel is formed between the impeller and the annular cavity. The impeller can slide axially along the central shaft and rotate synchronously with the central shaft; elastic jacking structures are provided on both the left and right sides of the impeller inside the pump casing. The elastic jacking structures are configured to keep the impeller in the center position of the annular cavity in the initial state and reset it after the impeller moves. The pump casing has a baffle plate inside, which divides the inner cavity into a main cavity and an regulating cavity. The intermediate shaft and impeller are located in the main cavity. Several water passage holes are evenly distributed around the circumference of the baffle plate. The regulating cavity is connected to a clean water source. The end face of the impeller near the regulating cavity is equipped with auxiliary blades. The auxiliary blades are evenly distributed around the circumference and located inside the radial blades. The auxiliary blades form an angle with the radial direction of the impeller. The regulating chamber is equipped with a sealing plate that rotates within it. The sealing plate has several regulating holes evenly distributed around its circumference. The number and shape of the regulating holes are adapted to the water passage holes. The regulating chamber is equipped with an regulating structure that is configured to convert the movement of the impeller into the rotation of the sealing plate. The rotation angle of the sealing plate is positively correlated with the movement frequency of the impeller. The adjusting structure includes a first piston, a second piston, and an intermediate connecting piece; A piston cylinder is located at the center of the partition. Both the first piston and the second piston are slidably disposed on the piston cylinder. The first piston and the second piston divide the piston cylinder into a left chamber, a middle chamber, and a right chamber. The left chamber is located between the first piston and the piston cylinder and is connected to the main cavity of the pump housing. A first connecting hole is provided on the first piston. The first connecting hole connects the left chamber and the middle chamber. A one-way valve is provided in the first connecting hole. The one-way valve is configured to allow liquid to flow from the left chamber to the middle chamber. The intermediate connecting piece is rotatably connected to the first piston and fixedly connected to the impeller. As the impeller slides along the intermediate rotating shaft, it drives the first piston to slide. During the sliding process of the first piston, the liquid in the main chamber of the pump casing is drawn into the intermediate chamber. The second piston is provided with a second connecting hole, which connects the middle chamber and the right chamber. The liquid inside the right chamber can be discharged outward through a one-way valve. The second piston is spirally connected to the sealing plate, and thus drives the sealing plate to rotate when it moves. A return spring is provided between the second piston and the pump housing.

2. A vortex pump of claim 1, wherein The elastic push structure includes a contact steel ball and an elastic element. The pump casing has mounting holes on both sides of the impeller. The contact steel ball is slidably disposed in the mounting hole. The elastic element is disposed in the mounting hole and acts on the contact steel ball. The elastic element is configured such that the contact steel ball abuts against the impeller.

3. A vortex pump with low operating noise according to claim 2, characterized in that A ball seat is provided in the mounting hole, and the steel ball is mounted on the ball seat and hinged to the ball seat. The elastic element is connected to the ball seat.

4. A vortex pump of claim 3, wherein The mounting hole has a threaded connection with a screw, and the end of the elastic element away from the ball seat is connected to the screw.

5. The vortex pump of claim 1, wherein A seal is provided on the intermediate shaft. The seal is fixedly connected to the pump casing and rotatably connected to the intermediate shaft. The seal seals the end of the pump casing near the power unit.

6. A vortex pump of claim 1, wherein The pump housing includes a first housing and a second housing, which are fastened together and detachably connected.

7. A vortex pump of claim 1, wherein The power unit is a drive motor, the output shaft of which is connected to the intermediate rotating shaft. The drive motor is an axial flux motor.

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