A magnetic levitation water pump

Abstract

The present invention discloses a magnetic levitation water pump, comprising a housing and a rotor, a stator, an impeller, a first rotating shaft, and a second rotating shaft arranged in the housing; the housing has a first chamber and a second chamber; the stator is installed in the first chamber; the impeller is installed on the rotor to rotate synchronously with the rotor around the rotation axis; the first rotating shaft and the second rotating shaft are arranged in sequence along the rotation axis, the opposite ends of the first rotating shaft and the second rotating shaft are respectively connected to the housing, the two ends of the rotor act on the opposite ends of the first rotating shaft and the second rotating shaft respectively, and the rotor is provided with a magnetic part arranged around the rotation axis so that the rotor is suspended between the opposite ends of the first rotating shaft and the second rotating shaft. In this way, the rotor has no friction with other parts during the rotation action, has a good mute effect, and also avoids the heat generated by friction. The suspended setting can better dissipate heat, reduce the failure rate, extend the service life of the water pump, reduce the operating energy consumption and operating cost, and the water pump has good operating stability and high system efficiency.

Description

Technical Field

[0001] The invention relates to the field of water pump technology, in particular to a magnetic levitation water pump. Background Art

[0002] At present, a water pump is a device used to transport working fluid. When liquid such as water enters the water pump, the liquid is pressurized by the operation of the impeller inside the water pump, and then the liquid is sent out of the water pump to achieve the purpose of liquid transportation.

[0003] The existing water pump rotor generally uses a rotating shaft. During the long-term operation of the water pump, the friction between the rotating shaft and other parts of the rotor rotating movement will produce noise on the one hand, and friction loss on the other hand, resulting in high energy consumption during operation. In addition, the current water pump is prone to clogging by impurities during operation, which makes the water pump difficult to rotate, consumes a lot of energy, and even causes loss and failure to the water pump, affecting the service life of the water pump.

[0004] Therefore, it is necessary to develop a new technical solution to solve the above problems. Summary of the invention

[0005] In view of this, the present invention aims to address the deficiencies in the prior art, and its main purpose is to provide a magnetic levitation water pump, in which the rotor has no friction with other components during rotation, has a good silent effect, and avoids the heat generated by friction. The suspended setting can better dissipate heat, reduce the failure rate, extend the service life of the water pump, reduce operating energy consumption and operating costs, and the water pump has good operating stability and high system efficiency.

[0006] To achieve the above purpose, the present invention adopts the following technical solutions:

[0007] A magnetic levitation water pump comprises a housing and a rotor, a stator, an impeller, a first rotating shaft and a second rotating shaft arranged in the housing; wherein:

[0008] The shell has a first chamber and a second chamber; the stator is installed in the first chamber; the shell has a water inlet and a water outlet, and the water inlet and the water outlet are respectively connected to the second chamber; the rotor, the impeller, the first rotating shaft, and the second rotating shaft are all installed in the first chamber, and the impeller is installed on the rotor to rotate synchronously with the rotor around the rotation axis; the first rotating shaft and the second rotating shaft are arranged in sequence along the rotation axis, and the opposite ends of the first rotating shaft and the second rotating shaft are respectively connected to the shell, and the two ends of the rotor respectively act on the opposite ends of the first rotating shaft and the second rotating shaft in a movably manner, and the rotor is provided with magnetic parts arranged around the rotation axis so that the rotor is suspended between the opposite ends of the first rotating shaft and the second rotating shaft.

[0009] As a preferred solution, a first concave cavity and a second concave cavity are respectively provided at both ends of the rotor along the rotation axis, and the facing ends of the first rotating shaft and the second rotating shaft extend into the first concave cavity and the second concave cavity respectively.

[0010] As a preferred solution, the facing ends of the first rotating shaft and the second rotating shaft are both spherical heads, and the first concave cavity and the second concave cavity are both concave arc surfaces.

[0011] As a preferred embodiment, the impeller is installed at the end of the rotor where the first concave cavity is located. The first concave cavity is an outward-expanding cavity, and the first concave cavity is larger than the spherical end of the first rotating shaft so that the rotor can swing relative to the spherical end of the first rotating shaft.

[0012] As a preferred solution, the depth of the first cavity is smaller than the spherical radius of the spherical end of the first rotating shaft, and the depth of the second cavity is larger than the spherical radius of the spherical end of the second rotating shaft.

[0013] As a preferred solution, a through hole is connected between the first cavity and the second cavity.

[0014] As a preferred solution, the rotor includes a rotor body and an intermediate block installed in the rotor body, and the first concave cavity and the second concave cavity are respectively arranged at two ends of the intermediate block.

[0015] As a preferred solution, the intermediate block is a graphite block.

[0016] As a preferred solution, the housing includes a main housing, a front cover and a rear cover;

[0017] The main housing has a rotor seat, a first shaft hole protrusion is convexly provided on the rear side of the front cover, a second shaft hole protrusion is convexly provided on the inner rear side of the rotor seat, the rotor is installed in the rotor seat, the front cover is installed on the front side of the main housing, and the opposite ends of the first rotating shaft and the second rotating shaft extend into the first shaft hole protrusion and the second shaft hole protrusion respectively; the first chamber is located between the rotor seat and the front cover;

[0018] The stator is installed on the periphery of the rotor seat body, the rear cover is installed on the rear side of the main shell, and the second chamber is located between the rotor seat body and the rear cover.

[0019] As a preferred embodiment, the water inlet and the water outlet are respectively arranged on the outer peripheral side of the main shell; the front side of the main shell corresponding to the rotor seat body is provided with an impeller cavity, and the front side of the impeller cavity is provided with an impeller cover plate, and the impeller cover plate is provided with a center hole and peripheral holes; the impeller cover plate is located on the rear side of the front cover and forms a water outlet gap with the front cover, the main shell is provided with a water inlet channel and a water outlet channel, the water inlet channel passes through the peripheral side wall of the impeller cavity from the outer peripheral side of the main shell to the inner peripheral side of the impeller cavity, and the water inlet passes through the impeller cavity through the water inlet channel; the water outlet channel passes through the peripheral side wall of the impeller cavity from the outer peripheral side of the main shell, and passes through to the front end face of the peripheral side wall of the impeller cavity to be connected with the water outlet gap, and the impeller cavity completes water outlet through the center hole, the water outlet gap, the peripheral holes, the water outlet channel and the water outlet in sequence.

[0020] Compared with the prior art, the present invention has obvious advantages and beneficial effects. Specifically, it can be seen from the above technical scheme that it is mainly achieved by changing the rotating shaft of the traditional technology into a double-axis design, and providing magnetic parts arranged around the rotating axis on the rotor to allow the rotor to be suspended between the opposite ends of the first rotating shaft and the second rotating shaft. In this way, there is no friction between the rotor and other components during the rotation movement, and the silent effect is good, and the heat generated by friction is avoided. The suspended setting can better dissipate heat, reduce the failure rate, extend the service life of the water pump, reduce the operating energy consumption and operating costs, and the water pump has good operating stability and high system efficiency. At the same time, since the rotor is suspended between the opposite ends of the first rotating shaft and the second rotating shaft, the rotor can swing within a certain range, which is convenient for the discharge of impurities and avoids impurity blockage.

[0021] In order to more clearly illustrate the structural features, technical means and specific purposes and functions achieved by the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the overall structure of an embodiment of the present invention;

[0023] Figure 2 is a cross-sectional structural diagram of an embodiment of the present invention;

[0024] Figure 3 is an exploded view of an embodiment of the present invention;

[0025] Figure 4 is another exploded view of an embodiment of the present invention;

[0026] Figure 5 is a cross-sectional view of an embodiment of the present invention;

[0027] Figure 6 : is a three-dimensional diagram of the main housing in an embodiment of the present invention

[0028] Figure 7 is a cross-sectional view of a first rotating shaft, a second rotating shaft, and an intermediate block in an embodiment of the present invention;

[0029] Figure 8 It is an exploded view of the first rotating shaft, the second rotating shaft, and the intermediate block in an embodiment of the present invention.

[0030] Description of the accompanying drawings:

[0031] Rotor 1, stator 2, first iron core 201, second iron core 202, impeller 3, first rotating shaft 4, second rotating shaft 5, first chamber 6, second chamber 7, water inlet 8, water outlet 9, rotation axis 10, magnetic part 11, first concave cavity 12, second concave cavity 13, rotor body 14, intermediate block 15, through hole 151, main shell 16, front cover 17, rear cover 18, rotor seat body 19, first axial hole protrusion 20, second axial hole protrusion 21, impeller cavity 22, impeller cover plate 23, center hole 24, peripheral hole 241, stop ring 242, water outlet gap 25, water inlet channel 26, water outlet channel 27, inner circumference 28, front end face 29. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be noted that directional words, such as the terms "circumferential", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present invention.

[0033] Please refer to Figures 1 to 8 As shown, it shows the specific structure of an embodiment of the present invention.

[0034] A magnetic levitation water pump comprises a housing and a rotor 1, a stator 2, an impeller 3, a first rotating shaft 4 and a second rotating shaft 5 arranged in the housing; wherein the stator 2 comprises a first iron core 201 and a second iron core 202 stacked front and back.

[0035] The shell has a first chamber 6 and a second chamber 7; the stator 2 is installed in the first chamber 6; the shell has a water inlet 8 and a water outlet 9, and the water inlet 8 and the water outlet 9 are respectively connected to the second chamber 7; the rotor 1, the impeller 3, the first rotating shaft 4, and the second rotating shaft 5 are all installed in the first chamber 6, and the impeller 3 is installed on the rotor 1 to rotate synchronously with the rotor 1 around the rotation axis 10; the first rotating shaft 4 and the second rotating shaft 5 are arranged in sequence along the rotation axis 10, and the opposite ends of the first rotating shaft 4 and the second rotating shaft 5 are respectively connected to the shell, and the two ends of the rotor 1 act on the opposite ends of the first rotating shaft 4 and the second rotating shaft 5 in a movably manner, and the rotor 1 is provided with a magnetic member 11 arranged around the rotation axis 10 so that the rotor 1 is suspended between the opposite ends of the first rotating shaft 4 and the second rotating shaft 5. The rotor 1 is provided with a first concave cavity 12 and a second concave cavity 13 at two ends along the rotation axis 10 , respectively. The facing ends of the first rotating shaft 4 and the second rotating shaft 5 extend into the first concave cavity 12 and the second concave cavity 13 , respectively.

[0036] The facing ends of the first rotating shaft 4 and the second rotating shaft 5 are both spherical heads, and the first concave cavity 12 and the second concave cavity 13 are both concave arc surfaces. The impeller 3 is installed at the end of the first concave cavity 12 on the rotor 1, and the first concave cavity 12 is an outward expansion cavity, and the first concave cavity 12 is larger than the spherical end of the first rotating shaft 4, so that the rotor 1 can swing relative to the spherical end of the first rotating shaft 4, which is convenient for impurities to be discharged and avoids impurity blockage.

[0037] like Figure 7 and Figure 8 As shown, the depth of the first cavity 12 is less than the ball radius of the ball-shaped end of the first rotating shaft 4, and the depth of the second cavity 13 is greater than the ball radius of the ball-shaped end of the second rotating shaft 5. A through hole 151 is connected between the first cavity 12 and the second cavity 13, which is convenient for storing lubricating oil and for the lubricating oil to be connected and used interchangeably in the first cavity 12 and the second cavity 13. The depth of the second cavity 13 is designed to be deeper, which can better meet the positioning stability and reliability of the rotor 1, while the depth of the first cavity 12 is shallower. At the same time, the opening area of ​​the first cavity 12 is larger, and the opening is usually circular. When there is a slight blockage of impurities in the water pump, it can produce a deflection within a certain range relative to the ball-shaped end of the first rotating shaft 4, which is equivalent to the rotor 1 and the impeller 3 having a floating rotation function. In this way, impurities can be discharged in time to avoid more serious blockage, so that the water pump itself has the ability to automatically discharge impurities and solve blockage problems.

[0038] The rotor 1 includes a rotor body 14 and an intermediate block 15 installed in the rotor body 14, and the first concave cavity 12 and the second concave cavity 13 are respectively arranged at two ends of the intermediate block 15. Preferably, the intermediate block 15 is a graphite block, which has the advantages of wear resistance, lubrication, high strength, etc.

[0039] In this embodiment, the structural design of the housing is ingenious and reasonable, and it is very convenient to install the rotor 1, the stator 2, the impeller 3, the first rotating shaft 4, and the second rotating shaft 5. Specifically:

[0040] The housing includes a main housing 16, a front cover 17 and a rear cover 18;

[0041] The main housing 16 has a rotor seat 19, a first shaft hole convex portion 20 is convexly provided on the rear side of the front cover 17, a second shaft hole convex portion 21 is convexly provided on the inner rear side of the rotor seat 19, the rotor 1 is installed in the rotor seat 19, the front cover 17 is installed on the front side of the main housing 16, and the opposite ends of the first rotating shaft 4 and the second rotating shaft 5 extend into the first shaft hole convex portion 20 and the second shaft hole convex portion 21 respectively; the first chamber 6 is located between the rotor seat 19 and the front cover 17;

[0042] The stator 2 is mounted on the periphery of the rotor seat 19 , the rear cover 18 is installed on the rear side of the main housing 16 , and the second chamber 7 is located between the rotor seat 19 and the rear cover 18 .

[0043] The water inlet 8 and the water outlet 9 are respectively arranged on the outer peripheral side of the main shell 16; the main shell 16 is provided with an impeller cavity 22 on the front side corresponding to the rotor seat body 19, and the impeller cover plate 23 is provided on the front side of the impeller cavity 22. The impeller cover plate 23 is provided with a central hole 24 and peripheral holes 241. A stop ring 242 is convexly provided on the front peripheral edge of the impeller cover plate 23. The central hole 24 and the peripheral holes 241 are located in the area surrounded by the stop ring 242; the impeller cover plate 23 is located on the rear side of the front cover 17 and forms a water outlet gap 25 with the front cover 17, and the stop ring 242 is in sealing contact with the front cover 17 The main housing 16 is provided with a water inlet channel 26 and a water outlet channel 27. The water inlet channel 26 passes through the peripheral side wall of the impeller chamber 22 from the outer peripheral side of the main housing 16 to the inner peripheral side 28 of the impeller chamber 22. The water inlet 8 passes through the impeller chamber 22 through the water inlet channel 26; the water outlet channel 27 passes through the peripheral side wall of the impeller chamber 22 from the outer peripheral side of the main housing 16, and passes through the front end surface 29 of the peripheral side wall of the impeller chamber 22 to communicate with the water outlet gap 25. The impeller chamber 22 discharges water through the center hole 24, the water outlet gap 25, the peripheral hole 241, the water outlet channel 27, and the water outlet 9 in sequence.

[0044] The main shell 16, front cover 17 and rear cover 18 can be made of aluminum, aluminum alloy and other materials with good heat dissipation performance. The main shell 16 is made of one-piece molding and is easy to produce. The installation and positioning structures are directly formed on the main shell 16, such as: convex parts, concave parts, positioning steps, water inlet channel 26, water inlet 8, water outlet 9, water outlet channel 27, etc., which makes the assembly of the entire water pump very convenient, improves the production and assembly efficiency, and is conducive to the promotion and application of the water pump.

[0045] To sum up, the design focus of the present invention is that it mainly changes the rotating shaft of the traditional technology into a double-axis design, and provides magnetic parts arranged around the rotation axis on the rotor to make the rotor suspended between the opposite ends of the first rotating shaft and the second rotating shaft. In this way, there is no friction between the rotor and other components during the rotation, the noise is small, and the heat generated by friction is avoided. The suspended setting can better dissipate heat, reduce the failure rate, extend the service life of the water pump, reduce operating energy consumption and operating costs, and the water pump has good operating stability and high system efficiency. At the same time, since the rotor is suspended between the opposite ends of the first rotating shaft and the second rotating shaft, the rotor can swing within a certain range, which is convenient for impurity discharge and avoids impurity clogging.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any slight modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A magnetic levitation water pump, characterized in that: It comprises a housing and a rotor (1), a stator (2), an impeller (3), a first rotating shaft (4), and a second rotating shaft (5) arranged in the housing; wherein: The housing has a first chamber (6) and a second chamber (7); the stator (2) is mounted in the first chamber (6); the housing has a water inlet (8) and a water outlet (9), the water inlet (8) and the water outlet (9) are respectively connected to the second chamber (7); the rotor (1), the impeller (3), the first rotating shaft (4), and the second rotating shaft (5) are all mounted in the first chamber (6); the impeller (3) is mounted on the rotor (1) so as to rotate with the rotor (1) around the rotation axis (10) The first rotating shaft (4) and the second rotating shaft (5) are arranged in sequence along the rotating axis (10); the opposite ends of the first rotating shaft (4) and the second rotating shaft (5) are respectively connected to the housing; the two ends of the rotor (1) respectively act movably on the opposite ends of the first rotating shaft (4) and the second rotating shaft (5); the rotor (1) is provided with a magnetic member (11) arranged around the rotating axis (10) so that the rotor (1) is suspended between the opposite ends of the first rotating shaft (4) and the second rotating shaft (5); A first concave cavity (12) and a second concave cavity (13) are respectively arranged at both ends of the rotation axis (10) on the rotor (1); a through hole (151) is connected between the first concave cavity (12) and the second concave cavity (13); the facing ends of the first rotating shaft (4) and the second rotating shaft (5) extend into the first concave cavity (12) and the second concave cavity (13) respectively; the facing ends of the first rotating shaft (4) and the second rotating shaft (5) are both spherical, and the first concave cavity (12) and the second concave cavity (13) are both concave arcs. The impeller (3) is mounted on the rotor (1) at the end where the first concave cavity (12) is located, the first concave cavity (12) is an outward-expanding cavity, and the first concave cavity (12) is larger than the spherical end of the first rotating shaft (4), so that the rotor (1) can swing relative to the spherical end of the first rotating shaft (4); the depth of the first concave cavity (12) is smaller than the spherical radius of the spherical end of the first rotating shaft (4), and the depth of the second concave cavity (13) is larger than the spherical radius of the spherical end of the second rotating shaft (5).

2. A magnetic levitation water pump according to claim 1, characterized in that: The rotor (1) comprises a rotor body (14) and an intermediate block (15) mounted in the rotor body (14); the first concave cavity (12) and the second concave cavity (13) are respectively arranged at two ends of the intermediate block (15).

3. A magnetic levitation water pump according to claim 2, characterized in that: The intermediate block (15) is a graphite block.

4. A magnetic levitation water pump according to claim 2, characterized in that: The housing comprises a main housing (16), a front cover (17) and a rear cover (18); The main housing (16) has a rotor seat (19), a first shaft hole protrusion (20) is convexly provided on the rear side of the front cover (17), a second shaft hole protrusion (21) is convexly provided on the inner rear side of the rotor seat (19), the rotor (1) is installed in the rotor seat (19), the front cover (17) is installed on the front side of the main housing (16), and the opposite ends of the first rotating shaft (4) and the second rotating shaft (5) extend into the first shaft hole protrusion (20) and the second shaft hole protrusion (21) respectively; the first chamber (6) is located between the rotor seat (19) and the front cover (17); The stator (2) is mounted on the periphery of the rotor seat body (19), the rear cover (18) is mounted on the rear side of the main housing (16), and the second chamber (7) is located between the rotor seat body (19) and the rear cover (18).

5. A magnetic levitation water pump according to claim 4, characterized in that: The water inlet (8) and the water outlet (9) are respectively arranged on the outer peripheral side of the main housing (16); an impeller cavity (22) is arranged on the front side of the main housing (16) corresponding to the rotor seat body (19); an impeller cover plate (23) is arranged on the front side of the impeller cavity (22); the impeller cover plate (23) is provided with a central hole (24) and peripheral holes (241); the impeller cover plate (23) is located on the rear side of the front cover (17) and forms a water outlet gap (25) with the front cover (17); the main housing (16) is provided with a water inlet channel (26) and a water outlet channel (27); the water inlet channel (26) ) from the outer peripheral side of the main casing (16) through the peripheral side wall of the impeller chamber (22) to the inner peripheral side (28) of the impeller chamber (22), and the water inlet (8) penetrates the impeller chamber (22) through the water inlet channel (26); the water outlet channel (27) from the outer peripheral side of the main casing (16) through the peripheral side wall of the impeller chamber (22) and penetrates to the front end surface (29) of the peripheral side wall of the impeller chamber (22) to communicate with the water outlet gap (25), and the impeller chamber (22) completes water outlet in sequence through the central hole (24), the water outlet gap (25), the peripheral hole (241), the water outlet channel (27), and the water outlet (9).

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