vortex pump

Abstract

The utility model discloses a vortex pump relates to brushless direct current water pump and its spare parts technical field, and it at least includes impeller component, and the impeller component includes the disc body of thickness t, and the disc body's outer edge position department is equipped with several blades along the circumferential direction, and the vortex pump is configured impeller chamber in, and the impeller component is suitable for rotating in the impeller chamber, and the two sides of impeller chamber have the axial clearance of impeller of height h between the inner wall along the horizontal direction configuration, and wherein, 0.03mm < (h-t) < 0.07mm. The utility model mainly solves how to provide the problem of reasonable impeller safety clearance structure for vortex pump, and the utility model is limited to the relationship of impeller axial clearance and impeller component thickness, replaces the limitation of safety clearance in the prior art, can accurately control the clearance between impeller component and impeller chamber, avoids the performance of vortex pump to be influenced by factors such as part size tolerance, assembly cumulative tolerance.

Description

Technical Field

[0001] This utility model relates to the technical field of brushless DC water pumps and their components, specifically a vortex pump. Background Technology

[0002] A vortex pump is a type of water pump. Its impeller is disc-shaped and has several small blades arranged circumferentially on its outer edge. When the impeller rotates, it can drive the liquid medium to repeatedly vortex in the blades and flow channel.

[0003] Brushless DC vortex pumps are an important category of vortex pumps. They are characterized by high head, small flow rate, small size, light weight, and simple structure, and are widely used in chemical, pharmaceutical, fire protection, and industrial fields.

[0004] In order to avoid mechanical friction between the impeller and the inner wall of the pump cover / casing, and thus avoid a series of problems such as abnormal noise, performance loss, mechanical wear and failure, existing brushless DC vortex pumps usually need to leave an axial clearance of 0.07mm to 0.15mm and a radial clearance of 0.15mm to 0.3mm between the impeller and the inner wall of the pump cover / casing as a safety clearance.

[0005] However, the performance stability of a brushless DC vortex pump is highly related to the machining and assembly precision of its components. If the aforementioned safety clearance is too large or too small, it may cause a sudden drop in the performance of the brushless DC vortex pump (for example, a sudden increase in input power or a sudden drop in mechanical efficiency), making it impossible to achieve the design parameters and power consumption.

[0006] In conclusion, how to provide a reasonable impeller safety clearance structure for vortex pumps has become one of the urgent problems to be solved. Utility Model Content

[0007] The purpose of this invention is to provide a vortex pump with a reasonable impeller safety clearance structure.

[0008] To achieve the above objectives, this utility model provides the following technical solution: a vortex pump, which includes at least an impeller component; the impeller component includes a disc-shaped body with a thickness of t, and a plurality of blades are arranged circumferentially at the outer edge of the disc-shaped body; an impeller chamber is disposed in the vortex pump; the impeller component is adapted to rotate in the impeller chamber; there is an axial clearance of the impeller with a height of h between the two horizontally arranged inner walls of the impeller chamber; wherein, 0.03mm < (ht) < 0.07mm.

[0009] In the above technical solution, the tolerance of the impeller axial movement clearance of the impeller chamber is set to ±0.01mm.

[0010] In the above technical solution, the thickness of the disc-shaped body of the impeller component is set to a tolerance of ±0.01mm.

[0011] In the above technical solution, the vortex pump of this utility model further includes at least a pump cover component, a pump casing component, and a bearing cover component; the impeller chamber is formed on the inner side of the pump cover component, and an inlet and an outlet communicating with the inner and outer sides of the impeller chamber are respectively formed on the pump cover component; a rotor chamber is formed in the pump casing component; the bearing cover component covers the opening of the rotor chamber of the pump casing component; the pump cover component covers the pump casing component to cover the bearing cover component; the gap between the inner wall of the pump cover component arranged in the horizontal direction and the outer wall of the bearing cover component arranged in the horizontal direction is the axial movement clearance of the impeller.

[0012] In the above technical solution, the inner wall of the pump cover component forms a first flow channel at the position corresponding to the blade of the impeller component; the water inlet is connected to one end of the first flow channel, and the water outlet is connected to the other end of the first flow channel; the outer wall of the bearing cover component forms a second flow channel at the position corresponding to the blade of the impeller component.

[0013] In the above technical solution, a dry and wet shielding sleeve is integrally formed on the pump casing component to surround the rotor chamber.

[0014] In the above technical solution, the vortex pump of this utility model further includes a rotating shaft component, a rotor assembly, a stator assembly, and a drive circuit board; the rotating shaft component passes through the bearing cover component, with one end of the rotating shaft component located in the impeller chamber of the pump cover component and the other end of the rotating shaft component located in the rotor chamber of the pump casing component; the rotor assembly is sleeved on the rotating shaft component and located in the rotor chamber of the pump casing component; the impeller component is sleeved on the rotating shaft component and located in the impeller chamber of the pump cover component; both the rotor assembly and the impeller component rotate coaxially with the rotating shaft component; the stator assembly is disposed in the pump casing component and located outside the rotor chamber, and the stator assembly and the rotor assembly are aligned with each other in the radial direction; the drive circuit board is disposed in the pump casing component and electrically connected to the stator assembly.

[0015] In the above technical solution, bearings are respectively embedded at the bottom of the rotor chamber of the bearing cover component and the pump housing component to support the rotating shaft component.

[0016] In the above technical solution, a flow hole is provided at the bearing cover component, and a flow groove is provided at the inner hole of the bearing, so that the impeller chamber of the pump cover component and the rotor chamber of the pump casing component are interconnected.

[0017] In the above technical solution, a first axial mounting surface is formed on the inner wall of the pump cover component, and the pump cover component is pulled up around the first axial mounting surface to form a first radial mounting surface; a second axial mounting surface is formed on the inner wall of the pump housing component, and the pump housing component is pulled up around the second axial mounting surface to form a second radial mounting surface; the first axial mounting surface of the pump cover component and the second axial mounting surface of the pump housing component respectively press-fit and limit the bearing cover component in the axial direction; the first radial mounting surface of the pump cover component and the second radial mounting surface of the pump housing component respectively gap-limit the bearing cover component in the radial direction.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows: The vortex pump of this utility model has an impeller component comprising a disc-shaped body with a thickness of t. The two inner walls of the impeller chamber are arranged horizontally on both sides, and there is an axial clearance of the impeller with a height of h, with a relationship of 0.03mm < (ht) < 0.07mm. By limiting the relationship between the axial clearance of the impeller and the thickness of the impeller component, the limitation of the safety clearance in the prior art is replaced. The clearance between the impeller component and the impeller chamber can be precisely controlled, avoiding the influence of factors such as component size tolerance and assembly cumulative tolerance on the performance of the vortex pump. This improves the operating efficiency and stability of the vortex pump, and enables the design of the vortex pump to have fewer components, simpler assembly, and a compact and reliable structure, thereby saving material costs and assembly costs, and further improving product competitiveness. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present invention.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is a cross-sectional view of the present invention.

[0022] Figure 4 for Figure 3 A magnified view of part A in the image.

[0023] The attached figures are labeled as follows: 1. Pump cover component; 11. Impeller chamber; 12. Inlet; 13. Outlet; 14. First flow channel; 15. First axial mounting surface; 16. First radial mounting surface; 2. Pump casing component; 21. Rotor chamber; 22. Dry and wet shielding sleeve; 23. Second axial mounting surface; 24. Second radial mounting surface; 3. Bearing cover component; 31. Second flow channel; 32. Flow hole; 4. Impeller component; 41. Disc-shaped body; 42. Blade; 5. Shaft component; 51. Bearing; 511. Flow groove; 6. Rotor assembly; 7. Stator assembly; 8. Drive circuit board; 9. Rear end cover component; 10. Impeller axial movement clearance. Detailed Implementation

[0024] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] This embodiment provides a vortex pump for driving the flow of liquid media.

[0026] Please see Figures 1-4 The vortex pump of this embodiment includes at least an impeller component 4.

[0027] Among them, the impeller component 4 is a one-piece molded engineering plastic or metal component.

[0028] The impeller component 4 includes a disc-shaped body 41 with a thickness of t, and a plurality of blades 42 are arranged along the circumferential direction at the outer edge of the disc-shaped body 41. In fact, the plurality of blades 42 are integrally formed with the disc-shaped body 41 of the impeller component 4.

[0029] The vortex pump is equipped with an impeller chamber 11, which is a cavity structure configured in the vortex pump.

[0030] The impeller component 4 is adapted to rotate within the impeller chamber 11.

[0031] The impeller chamber 11 has an axial clearance 10 of height h between its two horizontally arranged inner walls (i.e., the top inner wall and the bottom inner wall).

[0032] Among them, 0.03mm < (ht) < 0.07mm.

[0033] Furthermore, the impeller axial clearance 10 of the impeller chamber 11 is set to a tolerance of ±0.01mm.

[0034] Furthermore, the thickness of the disc-shaped body 41 of the impeller component 4 is set to a tolerance of ±0.01 mm.

[0035] Specifically, the vortex pump of this embodiment further includes at least a pump cover component 1, a pump housing component 2, and a bearing cover component 3; wherein, the pump cover component 1 is an integrally formed engineering plastic or metal cover component, especially a material with high hardness, good wear resistance, low roughness, and corrosion resistance; the pump housing component 2 is an integrally formed engineering plastic or metal semi-shell component, used to provide a structural support foundation for the vortex pump of this embodiment; the bearing cover component 3 is an integrally formed engineering plastic or metal cover component, especially a material with high hardness, good wear resistance, low roughness, and corrosion resistance; an impeller chamber 11 is formed on the inner side of the pump cover component 1, and an inlet 12 and an outlet 13 connecting the inner and outer sides of the impeller chamber 11 are respectively formed on the pump cover component 1. The impeller chamber 11 is a hollow structure feature inside the pump cover component 1. The inlet 12 and the outlet 13 are both short tubular structures integrally formed on the pump cover component 1. A rotor chamber 21 is formed in the pump casing component 2. In fact, the rotor chamber 21 is a hollow structure feature integrally formed with the pump casing component 2. The bearing cover component 3 covers the opening of the rotor chamber 21 of the pump casing component 2 (the two can achieve circumferential positioning and anti-rotation through the positioning rib-positioning groove structure) to separate the impeller chamber 11 of the pump cover component 1 and the rotor chamber 21 of the pump casing component 2. The pump cover component 1 covers the pump casing component 2 to cover the bearing cover component 3. The gap between the inner wall of the pump cover component 1 arranged in the horizontal direction and the outer wall of the bearing cover component 3 arranged in the horizontal direction is the impeller axial movement clearance 10.

[0036] Specifically, a first flow channel 14 is formed on the inner wall of the pump cover component 1 at the position corresponding to the blade 42 of the impeller component 4; the inlet 12 is connected to one end of the first flow channel 14, and the outlet 13 is connected to the other end of the first flow channel 14; in this embodiment, the first flow channel 14 is an arc-shaped groove structure integrally formed on the inner wall of the pump cover component 1, and its cross-section is "C"-shaped; a second flow channel 31 is formed on the outer wall of the bearing cover component 3 at the position corresponding to the blade 42 of the impeller component 4. In this embodiment, the second flow channel 31 is an arc-shaped groove structure integrally formed on the outer wall of the bearing cover component 3, and its cross-section is "C"-shaped; the first flow channel 14 and the second flow channel 31 are opposite to each other and together constitute the vortex flow channel of the vortex pump in this embodiment.

[0037] Furthermore, a dry and wet shielding sleeve 22 is integrally formed on the pump housing component 2 to form the rotor chamber 21. In this embodiment, the pump housing component 2 is made of engineering plastic, and the dry and wet shielding sleeve 22 is integrally injection molded with the pump housing component 2 to save the material cost and assembly cost of separately setting the dry and wet shielding sleeve 22.

[0038] More specifically, the vortex pump of this embodiment also includes a shaft component 5, a rotor assembly 6, a stator assembly 7, and a drive circuit board 8; wherein, the shaft component 5 is a cylindrical shaft made of metal, suitable for use as a mechanical shaft, the rotor assembly 6 is a permanent magnet rotor, specifically composed of a rotor core and permanent magnets inserted into the rotor core, the stator assembly 7 specifically composed of a stator core and stator windings wound on the stator core, and the drive circuit board 8 is a printed circuit board (PCB), which carries the main control, power electronic devices for driving the stator assembly 7, and necessary peripheral circuits for driving the stator assembly 7; the shaft component 5 passes through the bearing cover component 3, so that one end of the shaft component 5 is located in the impeller chamber 11 of the pump cover component 1, and the other end of the shaft component 5 is located in the rotor chamber 21 of the pump housing component 2; the rotor assembly 6 is sleeved on the shaft component 5 and located in the rotor chamber 21 of the pump housing component 2. In this embodiment, the rotor assembly 6 and The rotating shaft component 5 is both interference-fitted and splined; the impeller component 4 is sleeved on the rotating shaft component 5 and located in the impeller chamber 11 of the pump cover component 1. In this embodiment, the impeller component 4 and the rotating shaft component 5 are both interference-fitted and non-linearly fitted (i.e., the end of the rotating shaft component 5 is a D-shaped flat section, and the impeller component 4 has a D-shaped hole, with the D-shaped flat section of the rotating shaft component 5 inserted into the D-shaped hole of the impeller component 4); the rotor assembly 6 and the impeller component 4 both rotate coaxially with the rotating shaft component 5; the stator assembly 7 is disposed on the pump casing. The stator assembly 7 and the rotor assembly 6 are aligned radially within the pump housing component 2 and located outside the rotor chamber 21. The drive circuit board 8 is disposed within the pump housing component 2 and is electrically connected to the stator assembly 7. The stator assembly 7 and the drive circuit board 8 can be fixed within the pump housing component 2 by means of screws, clips, or potting. In addition, a rear end cover component 9 can be disposed at the other end of the pump housing component 2 relative to the pump cover component 1 to shield the stator assembly 7 and the drive circuit board 8.

[0039] Furthermore, the end of the rotating shaft component 5 is configured with an arched structure so that the impeller component 4 can pass through it, and can reduce the contact area between the rotating shaft component 5 and the inner wall of the pump cover component 1 when the combination of the rotating shaft component 5, the rotor assembly 6 and the impeller component 4 floats.

[0040] More specifically, bearings 51 (which are ceramic bearings or graphite bearings with self-lubricating properties) are respectively embedded at the bottom of the rotor chamber 21 of the bearing cover component 3 and the pump housing component 2 to support the rotating shaft component 5, so that the combination of the rotating shaft component 5, the rotor assembly 6 and the impeller component 4 is suitable for rotation.

[0041] Furthermore, a flow hole 32 is provided at the bearing cover component 3, and a flow groove 511 is provided at the inner hole of the bearing 51, so that the impeller chamber 11 of the pump cover component 1 and the rotor chamber 21 of the pump casing component 2 are interconnected, so that the liquid medium in the impeller chamber 11 can flow into the rotor chamber 21, thereby realizing water lubrication of the bearing 51 on the one hand, liquid cooling of the rotor assembly 6 and the stator assembly 7 on the other hand, and also discharging the debris accumulated in the rotor chamber 21 and the bearing 51 through the flowing liquid medium, so as to avoid jamming of the assembly of the shaft component 5, the rotor assembly 6 and the impeller component 4.

[0042] Furthermore, a first axial mounting surface 15 is formed on the inner wall of the pump cover component 1, and the pump cover component 1 is pulled up around the first axial mounting surface 15 to form a first radial mounting surface 16. In this embodiment, the inner wall of the pump cover component 1 is pulled up to form an annular stepped mounting rib, the bottom surface of which is the first axial mounting surface 15, and the stepped sidewall of which is the first radial mounting surface 16. A second axial mounting surface 23 is formed on the inner wall of the pump housing component 2, and the pump housing component 2 is pulled up around the second axial mounting surface 23 to form a second radial mounting surface 24. In this embodiment, the end face of the pump housing component 2 is pulled up to form an annular stepped mounting rib, the bottom surface of which is the second axial mounting surface 23, and the stepped sidewall of which is the second radial mounting surface 24. Assembly surface 24; the first axial assembly surface 15 of the pump cover component 1 and the second axial assembly surface 23 of the pump housing component 2 press-fit and limit the bearing cover component 3 from the axial direction; the first radial assembly surface 16 of the pump cover component 1 and the second radial assembly surface 24 of the pump housing component 2 respectively limit the bearing cover component 3 from the radial direction; it can be understood that the pump cover component 1 and the pump housing component 2 are fixed by screw locking and the bearing cover component 3 is press-fitted and limited; in this embodiment, the assembly rib of the pump cover component 1 and the outer edge of the pump cover component 1 form a sealing groove structure, the assembly rib of the pump housing component 2 is inserted into the sealing groove structure of the pump cover component 1, and the two form a small gap clearance structure, which is conducive to realizing the coaxial assembly of the pump housing component 2, the bearing cover component 3 and the pump cover component 1.

[0043] In this embodiment, the vortex pump has an impeller component 4 comprising a disc-shaped body 41 with a thickness of t. The two horizontally arranged inner walls of the impeller chamber 11 have an axial clearance 10 with a height of h, where 0.03 mm < (ht) < 0.07 mm. By limiting the relationship between the impeller axial clearance 10 and the thickness of the impeller component 4, the limitation of the safety clearance in the prior art is replaced. This allows for precise control of the clearance between the impeller component 4 and the impeller chamber 11, preventing the performance of the vortex pump from being affected by factors such as component dimensional tolerances and assembly cumulative tolerances. This improves the operating efficiency and stability of the vortex pump and enables the design of the vortex pump to have fewer components, simpler assembly, and a more compact and reliable structure, thereby saving material and assembly costs and further enhancing product competitiveness.

[0044] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vortex pump, characterized in that, It includes at least an impeller component; The impeller component includes a disc-shaped body with a thickness of t, and a plurality of blades are arranged along the circumferential direction at the outer edge of the disc-shaped body. The vortex pump is equipped with an impeller chamber; The impeller component is adapted to rotate within the impeller chamber; The impeller chamber has an axial clearance of height h between its two horizontally arranged inner walls. Among them, 0.03mm < (ht) < 0.07mm.

2. The vortex pump according to claim 1, characterized in that, The tolerance of the impeller axial clearance of the impeller chamber is set to ±0.01mm.

3. The vortex pump according to claim 1 or 2, characterized in that, The thickness of the disc-shaped body of the impeller component is set to a tolerance of ±0.01 mm.

4. The vortex pump according to claim 1, characterized in that, It also includes at least the pump cover component, the pump housing component, and the bearing cover component; The impeller chamber is formed on the inner side of the pump cover component, and an inlet and an outlet are respectively formed on the pump cover component to connect the inner and outer sides of the impeller chamber. A rotor chamber is formed within the pump casing component; The bearing cover component covers the opening of the rotor chamber of the pump housing component; The pump cover component fits over the pump housing component to cover the bearing cover component; The gap between the inner wall of the pump cover component arranged horizontally and the outer wall of the bearing cover component arranged horizontally is the axial clearance of the impeller.

5. The vortex pump according to claim 4, characterized in that, The inner wall of the pump cover component has a first flow channel formed at the position corresponding to the blade of the impeller component; The inlet is connected to one end of the first flow channel, and the outlet is connected to the other end of the first flow channel. The outer wall of the bearing cover component has a second flow channel formed at the position corresponding to the blade of the impeller component.

6. The vortex pump according to claim 4 or 5, characterized in that, The pump casing component is integrally formed with a dry and wet shielding sleeve to enclose the rotor chamber.

7. The vortex pump according to claim 6, characterized in that, It also includes shaft components, rotor assemblies, stator assemblies, and drive circuit boards; The rotating shaft component penetrates the bearing cover component, such that one end of the rotating shaft component is located in the impeller chamber of the pump cover component, and the other end of the rotating shaft component is located in the rotor chamber of the pump casing component; The rotor assembly is sleeved on the rotating shaft member and located in the rotor chamber of the pump casing member; the impeller member is sleeved on the rotating shaft member and located in the impeller chamber of the pump cover member; both the rotor assembly and the impeller member rotate coaxially with the rotating shaft member. The stator assembly is disposed within the pump housing member and located outside the rotor chamber, and the stator assembly and the rotor assembly are aligned with each other in the radial direction; The drive circuit board is disposed within the pump housing component and is electrically connected to the stator assembly.

8. The vortex pump according to claim 7, characterized in that, Bearings are respectively embedded in the bottom of the rotor chamber of the bearing cover component and the pump housing component to support the rotating shaft component.

9. The vortex pump according to claim 8, characterized in that, The bearing cover component has an overflow hole, and the inner hole of the bearing has an overflow groove, so that the impeller chamber of the pump cover component and the rotor chamber of the pump casing component are in communication with each other.

10. The vortex pump according to claim 4 or 5, characterized in that, A first axial mounting surface is formed on the inner wall of the pump cover component, and the pump cover component is pulled up around the first axial mounting surface to form a first radial mounting surface; A second axial mounting surface is formed on the inner wall of the pump housing component, and the pump housing component is pulled up around the second axial mounting surface to form a second radial mounting surface; The first axial mounting surface of the pump cover component and the second axial mounting surface of the pump housing component respectively press-fit and limit the bearing cover component in the axial direction; The first radial mounting surface of the pump cover component and the second radial mounting surface of the pump housing component respectively limit the bearing cover component in the radial direction.

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