Peripheral pump

Abstract

The present application relates to a peripheral pump comprising: a motor; a motor front end cover; a pump housing; an impeller; hubs are further arranged on the two sides of the impeller, the peripheral pump further comprises a first impeller ring and a second impeller ring, the first impeller ring and the second impeller ring are arranged on the motor front end cover and the pump shell correspondingly, the impeller is rotatably arranged on the first impeller ring and the second impeller ring through the hubs, and the outer sides of the hubs make contact with the inner side of the first impeller ring or the inner side of the second impeller ring. The impeller, the motor front end cover and the pump shell are arranged at intervals. The first gap between the impeller and the front end cover of the motor and the second gap between the impeller and the pump shell can be set to be relatively large on the premise that the impeller is prevented from generating end face pressure relief, so that friction resistance borne by the impeller during rotation is reduced, and energy loss of the motor for driving the impeller is avoided; meanwhile, generation of large noise is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of water pumps, and particularly to a vortex pump. Background Art

[0002] Vortex pumps have advantages such as high head and small flow rate, and also have a self-priming function. A vortex pump includes an impeller, a pump body, and a pump cover. The pump cover is closed on the pump body. The impeller is arranged inside the pump body and the pump cover and is driven by a motor. An annular flow passage is formed between the impeller and the pump body. The annular flow passage has a water inlet and a water outlet, and the water inlet and the water outlet are separated by a cut-off tongue. Liquid enters from the water inlet, obtains energy through the rotating impeller, and then is discharged from the water outlet. A number of radially arranged radial blades are evenly distributed along the outer edges on both sides of the impeller of the turbine pump to provide energy to the liquid. A radial gap is provided between the impeller and the cut-off tongue, and an axial gap is provided between the impeller and the pump housing and the end cover. The aforementioned gaps are all relatively small to achieve sealing between the water inlet and the water outlet. Since the axial gap between the impeller and the pump housing and the end cover is very small, the impeller is usually designed to float on the shaft. When the impeller rotates, friction may occur between the impeller and the pump housing and the end cover. On the one hand, this friction loses the energy of the motor and reduces the efficiency; on the other hand, the friction causes the pump to generate relatively large noise. Summary of the Utility Model

[0003] Based on this, the present application provides a vortex pump to improve the problem that in the prior art, friction occurs between the impeller of the vortex pump and the pump housing and the end cover, resulting in loss of energy of the motor driving the impeller and relatively large noise of the pump.

[0004] The present application provides a vortex pump, which includes:

[0005] A motor;

[0006] A motor front end cover, which is connected to the housing of the motor. The motor front end cover is open on the side away from the motor, and the output end of the motor passes through the motor front end cover;

[0007] A pump housing, which is closed on the open side of the motor front end cover. The pump housing is provided with a water inlet and a water outlet;

[0008] An impeller, which is arranged inside the pump housing. An annular flow passage is formed between the outer edge of the impeller and the pump housing and the motor front end cover. The water inlet and the water outlet are both communicated with the annular flow passage. A number of radially arranged radial blades are also provided on both sides of the outer edge of the impeller. The impeller is sleeved on the output end of the motor and forms a circumferential rotational limit with the output end of the motor;

[0009] Wherein, hubs are further arranged on both sides of the impeller. The vortex pump further includes a first wearing ring and a second wearing ring. The first wearing ring and the second wearing ring are respectively arranged on the front end cover of the motor and the pump casing. The impeller is rotatably arranged on the first wearing ring and the second wearing ring through the hubs. The outer side of the hub contacts the inner side of the first wearing ring or the second wearing ring. The impeller is arranged with a gap from both the front end cover of the motor and the pump casing.

[0010] In one embodiment, wearing ring chambers are arranged on both the front end cover of the motor and the pump casing, and the first wearing ring and the second wearing ring are both arranged in the wearing ring chambers.

[0011] In one embodiment, the first wearing ring is the same as the second wearing ring.

[0012] In one embodiment, both the first wearing ring and the second wearing ring are made of copper material.

[0013] In one embodiment, both the first wearing ring and the second wearing ring are sliding bearings.

[0014] In one embodiment, the hub and the impeller are integrally formed.

[0015] In one embodiment, the impeller and the output end of the motor form an axial movement limit.

[0016] In one embodiment, the vortex pump further includes a lock nut. The lock nut is threadedly connected to the output end of the motor and locks and fixes the impeller on the output end of the motor.

[0017] In one embodiment, a mechanical seal is arranged on the side of the front end cover of the motor close to the motor.

[0018] In one embodiment, the blades on both sides of the outer edge of the impeller are arranged in a circumferential dislocation along the impeller.

[0019] In this application, by arranging a first wearing ring and a second wearing ring on the front end cover of the motor and the pump casing, and arranging hubs on both sides of the impeller that cooperate with the first wearing ring and the second wearing ring to achieve the seal between the water inlet and the water outlet, the first gap between the impeller and the front end cover of the motor and the second gap between the impeller and the pump casing can be set relatively large on the premise of avoiding end face pressure relief of the impeller, thereby reducing the frictional resistance when the impeller rotates, avoiding energy loss of the motor driving the impeller, and at the same time avoiding the generation of relatively large noise. Description of the Drawings

[0020] Figure 1 It is a longitudinal sectional view of the vortex pump provided by an embodiment of this application;

[0021] Figure 2 Schematic structural diagram of the impeller of the vortex pump provided in an embodiment of the present application;

[0022] Figure 3 Longitudinal sectional view of the impeller of the vortex pump provided in an embodiment of the present application;

[0023] Figure 4 Schematic structural diagram of the first wearing ring and the second wearing ring of the vortex pump provided in an embodiment of the present application.

[0024] Reference numerals: 1, motor; 2, front end cover of the motor; 3, pump casing; 4, first wearing ring; 5, second wearing ring; 6, impeller; 6-1, hub; 7, lock nut; 8, first gap; 9, second gap. Detailed implementation manners

[0025] In order to make the objectives, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0026] It should be noted that the diagrams provided in this embodiment only illustrate the basic concept of the present invention in a schematic manner.

[0027] The structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should still fall within the scope that can be covered by the technical content disclosed by the present invention.

[0028] The orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "middle", "longitudinal", "transverse", "horizontal", "inner", "outer", "radial", "circumferential", etc. cited in this specification is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0029] An embodiment of the present application provides a vortex pump, which includes:

[0030] Motor 1;

[0031] The front end cover 2 of the motor, which is connected to the housing of the motor 1. The side of the front end cover 2 of the motor away from the motor 1 is open, and the output end of the motor 1 passes through the front end cover 2 of the motor;

[0032] The pump housing 3, which covers the open side of the front end cover 2 of the motor. The pump housing 3 is provided with a water inlet and a water outlet;

[0033] The impeller 6, which is arranged in the pump housing 3. An annular flow passage is formed between the outer edge of the impeller 6 and the pump housing 3 and the front end cover 2 of the motor. Both the water inlet and the water outlet are communicated with the annular flow passage. A plurality of radially arranged blades are arranged on both sides of the outer edge of the impeller 6. The impeller 6 is sleeved on the output end of the motor 1 and forms a circumferential rotational limit with the output end of the motor 1;

[0034] Wherein, hubs 6-1 are further arranged on both sides of the impeller 6. The vortex pump further includes a first wearing ring 4 and a second wearing ring 5. The first wearing ring 4 and the second wearing ring 5 are respectively arranged on the front end cover 2 of the motor and the pump housing 3. The impeller 6 is rotatably arranged on the first wearing ring 4 and the second wearing ring 5 through the hubs 6-1. The outer side of the hub 6-1 contacts the inner side of the first wearing ring 4 or the second wearing ring 5. The impeller 6 is arranged with a gap from both the front end cover 2 of the motor and the pump housing 3.

[0035] As Figure 1 shown, in this embodiment, by way of example, the vortex pump may include a motor 1 and a hydraulic component. The motor 1 is mainly used to drive the impeller 6 of the hydraulic component to rotate, so as to provide energy for the liquid passing through the annular flow passage. The front end cover 2 of the motor is arranged close to the output end of the motor 1. It is sleeved on the output end of the motor 1 and is connected to the housing of the motor 1. The front end cover 2 of the motor and the housing of the motor 1 may be detachably connected, for example, connected by bolts and other components. The side of the front end cover 2 of the motor away from the motor 1 is open, and the output end of the motor 1 passes through the front end cover 2 of the motor and extends along the open side of the front end cover 2 of the motor.

[0036] The hydraulic component may further include a pump housing 3. The pump housing 3 covers the open side of the front end cover 2 of the motor to close the front end cover 2 of the motor, that is, the pump housing 3 and the front end cover 2 of the motor are oppositely arranged. The pump housing 3 is provided with a water inlet and a water outlet. The liquid can enter from the water inlet and discharge from the water outlet. The impeller 6 is rotatably arranged in the pump housing 3. An annular flow passage is formed between its outer edge and the pump housing 3 and the front end cover 2 of the motor. It is not difficult to see that the front end cover 2 of the motor can be regarded as a part of the motor 1 or a part of the hydraulic component. Blades are arranged on both sides of the impeller 6. On any side of the impeller 6, a plurality of blades are arranged at equal intervals along the circumferential direction of the impeller 6. The blades are arranged on the outer edge of the impeller 6 and are arranged along the radial direction of the impeller 6. A plurality of blades are radially arranged. When the liquid enters the annular flow passage through the water inlet, the rotating impeller 6 can provide energy for the liquid in the annular flow passage through the action of its blades.

[0037] AsFigure 1 and Figure 2 As shown in Figure 2 , the impeller 6 is driven by the motor 1. It is sleeved on the output end of the motor 1 and forms a circumferential rotational limit with the output end of the motor 1. The way the impeller 6 forms a rotational limit with the output end of the motor 1 can be that there is an incomplete round hole on the impeller 6, such as a four-fifths round hole, and the part of the output end of the motor 1 extending into the impeller 6 is set to a corresponding shape so that the impeller 6 can rotate synchronously with the output end of the motor 1. Of course, a circumferential rotational limit can also be formed between the impeller 6 and the output end of the motor 1 through a mutually cooperating key and keyway.

[0038] As Figure 1 shown in Figure 1 , it should be noted that the gap between the impeller 6 and the front end cover 2 of the motor can be called the first gap 8, and the gap between the impeller 6 and the pump casing 3 can be called the second gap 9. In existing vortex pumps, both the first gap 8 and the second gap 9 are relatively small, usually set to 0.07 - 0.15 mm. When there is liquid flowing in the annular flow channel, the liquid can form a water film between the relatively small first gap 8 and the second gap 9 to achieve the seal between the water inlet and the water outlet; the friction caused by this small gap results in energy loss of the motor 1 of the existing vortex pump and relatively high noise.

[0039] As Figure 1 and Figure 3 shown in Figure 1 and Figure 3 , in this embodiment, the vortex pump further includes a first wearing ring 4 and a second wearing ring 5. The first wearing ring 4 can be arranged in the front end cover 2 of the motor, and the second wearing ring 5 can be arranged in the pump casing 3. When the impeller 6 is arranged in the pump casing 3, the impeller 6 is also rotatably arranged on the first wearing ring 4 and the second wearing ring 5, and hub 6 - 1 cooperating with the first wearing ring 4 and the second wearing ring 5 is arranged on both sides of the impeller 6. The outer diameter of the hub 6 - 1 is adapted to the inner diameter of the first wearing ring 4 or the second wearing ring 5. The hub 6 - 1 extends into the first wearing ring 4 or the second wearing ring 5, its outer side contacts the inner side of the first wearing ring 4 or the second wearing ring 5, and its two sides respectively abut against the first wearing ring 4 and the second wearing ring 5. At this time, the seal between the water inlet and the water outlet can be completed by the hub 6 - 1 on the impeller 6 cooperating with the first wearing ring 4 and the second wearing ring 5, and there is no need to set both the first gap 8 and the second gap 9 to be relatively small; in other words, in this embodiment, by arranging the hub 6 - 1 on the impeller 6 and setting the first wearing ring 4 and the second wearing ring 5 that cooperate with the hub, the seal between the water inlet and the water outlet can be achieved. Based on this, the first gap 8 and the second gap 9 can be set to be relatively large on the premise of avoiding end face pressure relief of the impeller 6, for example, set to 0.5 mm.

[0040] It is not difficult to understand that in this application, by providing the first wearing ring 4 and the second wearing ring 5 on the front end cover 2 of the motor and the pump housing 3, and arranging hubs 6-1 on both sides of the impeller 6 that cooperate with the first wearing ring 4 and the second wearing ring 5 to achieve the seal between the water inlet and the water outlet, the first gap 8 between the impeller 6 and the front end cover 2 of the motor and the second gap 9 between the impeller 6 and the pump housing 3 can be set relatively large on the premise of avoiding end face pressure relief of the impeller 6, thereby reducing the frictional resistance suffered when the impeller 6 rotates, avoiding energy loss of the motor 1 driving the impeller 6, and at the same time avoiding the generation of excessive noise. At the same time, this application can also reduce the risk of reduced energy efficiency caused by the increase in the first gap 8 and the second gap 9 due to friction, and at the same time can reduce the risks such as damage, corrosion, and jamming of the impeller 6 caused by friction.

[0041] Specifically, wearing ring chambers are provided on both the front end cover 2 of the motor and the pump housing 3, and the first wearing ring 4 and the second wearing ring 5 are both arranged in the wearing ring chambers.

[0042] As Figure 1 shown, in this embodiment, by way of example, the wearing ring chamber on the front end cover 2 of the motor can be arranged on the side of the front end cover 2 of the motor close to the impeller 6, and it can be arranged in a counterbore-like structure. The diameter of the wearing ring chamber can be equal to the outer diameter of the first wearing ring 4, and the first wearing ring 4 can be press-fitted in the wearing ring chamber so that the first wearing ring 4 can be kept stable in the wearing ring chamber. The depth of the wearing ring chamber should be slightly less than the height of the first wearing ring 4, so that when the first wearing ring 4 is assembled in place in the wearing ring chamber, the first wearing ring 4 can extend out of the wearing ring chamber, and further when the impeller 6 is rotatably arranged on the first wearing ring 4, the impeller 6 can maintain a sufficient gap from the front end cover 2 of the motor. Similarly, the arrangement of the second wearing ring 5 in the wearing ring chamber on the pump housing 3 is the same.

[0043] It can be understood that by providing the wearing ring chambers in this embodiment, it is convenient to accurately assemble the first wearing ring 4 and the second wearing ring 5 on the front end cover 2 of the motor and the pump housing 3 respectively, so as to facilitate the effective cooperation between the first wearing ring 4 and the second wearing ring 5 and the hub 6-1 of the impeller 6.

[0044] Specifically, the first wearing ring 4 is the same as the second wearing ring 5.

[0045] As Figure 1 and Figure 4As shown, in this embodiment, by way of example, the fact that the first port ring 4 and the second port ring 5 are the same can be understood as follows: the first port ring 4 and the second port ring 5 have the same dimensions, that is, the second port ring 5 has the same inner diameter, outer diameter, height and other dimensions as the first port ring 4. It is not difficult to see that at this time, the dimensions of the bearing chambers on the front end cover 2 of the motor and the pump housing 3 are also correspondingly set to be the same. At the same time, the fact that the first port ring 4 and the second port ring 5 are the same can also be understood as: the first port ring 4 and the second port ring 5 are made of the same material, for example, made of the same wear-resistant material.

[0046] It can be understood that in this embodiment, by setting the first port ring 4 and the second port ring 5 to be the same, the first port ring 4 and the second port ring 5 can be interchanged without the need to distinguish and identify the first port ring 4 and the second port ring 5, which is more convenient.

[0047] Of course, in some embodiments, the dimensions and materials of the first port ring 4 and the second port ring 5 can be reasonably selected according to actual needs, and at this time, the first port ring 4 and the second port ring 5 can be set to be different.

[0048] Specifically, both the first port ring 4 and the second port ring 5 are made of copper material.

[0049] As Figure 1 and Figure 4 shown, in this embodiment, the first port ring 4 and the second port ring 5 can both be made of copper material, and they can be processed by means such as casting. The first port ring 4 and the second port ring 5 made of copper material can make the first port ring 4 and the second port ring 5 have higher structural strength and better wear resistance, thereby ensuring the service life of the first port ring 4 and the second port ring 5.

[0050] Of course, in some embodiments, the first port ring 4 and the second port ring 5 can also be of other structures and materials. Specifically, the first port ring 4 and the second port ring 5 can both be sliding bearings, and at this time, the impeller 6 is subject to less frictional resistance when rotating.

[0051] Specifically, the hub 6-1 and the impeller 6 are integrally formed.

[0052] As Figure 2 and Figure 3 shown, in this embodiment, by way of example, the hub 6-1 and the impeller 6 can be made of the same material, and the hub 6-1 can be integrally prepared with the impeller 6. For example, when the impeller 6 is a casting made of metal material, the hub 6-1 is integrally cast with the impeller 6.

[0053] It can be understood that in this embodiment, by integrally forming the hub 6-1 and the impeller 6, the integral structure formed by the hub 6-1 and the impeller 6 can have high structural strength, so that when the hub 6-1 cooperates with the first wearing ring 4 and the second wearing ring 5, the impeller 6 can remain stable.

[0054] Specifically, the impeller 6 forms an axial movement limit with the output end of the motor 1.

[0055] As Figure 1 shown, in this embodiment, by way of example, it can be understood that the impeller 6 forms an axial movement limit with the output end of the motor 1 as follows: when the impeller 6 is sleeved on the output end of the motor 1, it is limited to prevent the impeller 6 from axially moving along the output end of the motor 1. By fixing the impeller 6, it can be prevented that when the impeller 6 moves axially, it contacts the pump casing 3 or the front end cover 2 of the motor and generates friction.

[0056] More specifically, the vortex pump further includes a lock nut 7, which is threadedly connected to the output end of the motor 1 and locks and fixes the impeller 6 on the output end of the motor 1.

[0057] As Figure 1 shown, in this embodiment, by way of example, when the impeller 6 is sleeved on the output end of the motor 1, one side of the impeller 6 close to the motor 1 can abut against the limit structure on the output end of the motor 1, such as structures like the shoulder, spring, etc. provided on the output end of the motor 1. At the same time, the output end of the motor 1 passes through the impeller 6 and is threadedly connected to the lock nut 7, and the lock nut 7 abuts against the side of the impeller 6 away from the motor 1 to lock and fix the impeller 6 on the output end of the motor 1, thereby forming an axial limit between the impeller 6 and the output end of the motor 1.

[0058] Of course, in some embodiments, the impeller 6 can also be limited by other components, such as a bolt arranged radially along the output end of the motor 1, and this bolt can pass through the impeller 6 and be screwed into the output end of the motor 1.

[0059] It can be understood that in this embodiment, by setting the lock nut 7 to limit the position of the impeller 6 on the output end of the motor 1, it can effectively prevent the impeller 6 from axially moving on the output end of the motor 1.

[0060] Specifically, a mechanical seal is provided on the side of the front end cover 2 of the motor close to the motor 1.

[0061] As Figure 1As shown, in this embodiment, by way of example, the motor front cover 2 can be used to mount the rotor bearing of the motor 1. On the side of the rotor bearing close to the pump housing 3, a mechanical seal can also be provided on the motor front cover 2. It is not difficult to understand that, on the premise of ensuring the normal rotation of the output end of the motor 1, the mechanical seal can prevent the liquid in the annular flow channel from leaking to the rotor bearing and causing risks such as rusting of the rotor bearing.

[0062] Specifically, the blades on both sides of the outer edge of the impeller 6 are arranged in a circumferential dislocation along the impeller 6.

[0063] As Figure 2 shown, in this embodiment, by way of example, the number of blades on both sides of the outer edge of the impeller 6 can be set to be equal and can be arranged in one-to-one correspondence. At the same time, the two blades arranged in one-to-one correspondence are arranged in a circumferential dislocation along the impeller 6. In other words, along the circumference of the impeller 6, any one blade on one side of the impeller 6 is arranged between two adjacent blades on the other side of the impeller 6.

[0064] It can be understood that in this embodiment, by arranging a number of blades on both sides of the impeller 6 in a dislocation manner, the liquid can obtain more energy when flowing through the annular flow channel, thereby improving the efficiency of the vortex pump.

[0065] The implementation principle of a vortex pump provided by an embodiment of the present application is as follows:

[0066] During assembly, the motor front cover 2 is connected to the housing of the motor 1. Subsequently, the first wearing ring 4 is arranged in the wearing ring chamber of the motor front cover 2, and then the impeller 6 is sleeved on the output end of the motor 1. Then, the lock nut 7 is connected to the output end of the motor 1 to fix the impeller 6 through the lock nut 7. When installing the impeller 6, the outer side of the hub 6-1 on the side of the impeller 6 close to the motor front cover 2 contacts the inner side of the first wearing ring 4. Subsequently, the second wearing ring 5 is arranged in the wearing ring chamber of the pump housing 3, and then the pump housing 3 is covered on the motor front cover 2 and connected to the motor front cover 2. When installing the pump housing 3, the outer side of the hub 6-1 on the side of the impeller 6 close to the pump housing 3 contacts the inner side of the second wearing ring 5.

[0067] In the present application, by providing the first wearing ring 4 and the second wearing ring 5 on the motor front cover 2 and the pump housing 3, and arranging the hubs 6-1 on both sides of the impeller 6 to cooperate with the first wearing ring 4 and the second wearing ring 5 to achieve the seal between the water inlet and the water outlet, the first gap 8 between the impeller 6 and the motor front cover 2 and the second gap 9 between the impeller 6 and the pump housing 3 can be set relatively large on the premise of avoiding end face pressure relief of the impeller 6, thereby reducing the frictional resistance when the impeller 6 rotates, avoiding energy loss of the motor 1 driving the impeller 6, and at the same time avoiding the generation of excessive noise.

[0068] The technical features of the above embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0069] The above-described embodiments merely represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the appended claims.

Claims

1. A vortex pump, characterized in that: The vortex pump comprises: Motor (1); A motor front end cover (2) connected to the housing of the motor (1), the motor front end cover (2) having an opening on one side away from the motor (1), and an output end of the motor (1) passing through the motor front end cover (2); A pump housing (3) covering one side of the opening of the motor front end cover (2), wherein the pump housing (3) is provided with a water inlet and a water outlet; An impeller (6) is arranged in the pump housing (3); an annular flow channel is formed between the outer edge of the impeller (6), the pump housing (3) and the front end cover (2) of the motor; the water inlet and the water outlet are both connected to the annular flow channel; a plurality of radial blades are also arranged on both sides of the outer edge of the impeller (6); the impeller (6) is sleeved on the output end of the motor (1) and forms a circumferential rotation limit with the output end of the motor (1); Wherein, hubs (6-1) are further provided on both sides of the impeller (6), and the vortex pump further comprises a first mouth ring (4) and a second mouth ring (5), wherein the first mouth ring (4) and the second mouth ring (5) are respectively provided on the front end cover (2) of the motor and the pump casing (3), and the impeller (6) is rotatably provided on the first mouth ring (4) and the second mouth ring (5) through the hub (6-1), and the outer side of the hub (6-1) is in contact with the inner side of the first mouth ring (4) or the second mouth ring (5), and the impeller (6) is provided with a gap with the front end cover (2) of the motor and the pump casing (3).

2. The vortex pump according to claim 1, characterized in that: The motor front end cover (2) and the pump housing (3) are both provided with a mouth ring chamber, and the first mouth ring (4) and the second mouth ring (5) are both arranged in the mouth ring chamber.

3. The vortex pump according to claim 1, characterized in that: The first mouth ring (4) is identical to the second mouth ring (5).

4. The vortex pump according to any one of claims 1 to 3, characterized in that: The first mouth ring (4) and the second mouth ring (5) are both made of copper.

5. The vortex pump according to any one of claims 1 to 3, characterized in that: The first mouth ring (4) and the second mouth ring (5) are both sliding bearings.

6. The vortex pump according to claim 1, characterized in that: The hub (6-1) and the impeller (6) are integrally formed.

7. The vortex pump according to claim 1, characterized in that: The impeller (6) and the output end of the motor (1) form an axial movement limit.

8. The vortex pump according to claim 7, characterized in that: The vortex pump further comprises a locking nut (7), wherein the locking nut (7) is threadedly connected to the output end of the motor (1) and locks and fixes the impeller (6) on the output end of the motor (1).

9. The vortex pump according to claim 1, characterized in that: A mechanical seal is provided on a side of the motor front end cover (2) close to the motor (1).

10. The vortex pump according to claim 1, characterized in that: The blades on both sides of the outer edge of the impeller (6) are staggered along the circumference of the impeller (6).

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