Shield pump motor rotor device and shield pump

Abstract

The utility model provides a motor rotor device of a shield pump, which comprises a rotor shaft and an iron core and winding assembly fixedly mounted on the peripheral wall of the rotor shaft, a cylindrical shielding sleeve is attached to the peripheral wall of the iron core and winding assembly, and a front plastic package layer and a rear plastic package layer are attached to the end faces of the two sides of the iron core and winding assembly respectively. The front plastic package layer and the rear plastic package layer are integrally connected with the shielding sleeve, and the front plastic package layer and the rear plastic package layer which are arranged on the two axial end faces of the iron core and winding assembly are integrally connected with the shielding sleeve on the outer circumferential face of the iron core winding, so that the space where the outside of the rotor iron core winding makes contact with air is directly eliminated, and the corrosion condition is effectively eliminated from the source; the rotor is effectively prevented from being rusted to cause clamping stagnation, and conveyed water quality deterioration caused by corrosion is also avoided. The utility model also provides a shield pump comprising the shield pump motor rotor device.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump equipment technical field, specifically, relate to a kind of shield pump motor rotor device, further relate to a kind of shield pump. BACKGROUND

[0002] The shield pump connects pump and motor together, the rotor of motor and the impeller of pump are fixed on the same shaft, the rotor and stator of motor are separated by shield sleeve, the rotor operates in the medium being transported, and the power is transmitted to the rotor by stator magnetic field.In addition, the manufacture of shield pump is not complex, and the liquid force end can be designed and manufactured according to the structure type and relevant standard specifications usually used by centrifugal pump.

[0003] The rotor of shield pump motor is immersed in the liquid being transported due to its characteristics, and as a rotating part in shield pump motor, it generally includes a shaft and a core body sleeved on the shaft, wherein the core body is generally composed of a permanent magnet or an iron core. Since the permanent magnet is usually made of neodymium iron boron and other rare earth materials, and the iron core is mainly made of silicon steel, both are prone to rust due to water oxidation, which affects the normal operation of the shield pump motor. Therefore, the conventional shield pump rotor structure is usually sealed and connected to the inner side wall of the shield sleeve through the upper cover plate arranged on the upper end of the iron core. The steel sleeve is arranged between the shaft and the iron core, and the inner edge of the upper cover plate is sealed and connected to the outer periphery of the steel sleeve. By arranging the steel sleeve, the iron core is isolated from the external fluid, and the sealing performance of the rotor structure is improved. However, in this structure, the cover plates at the upper and lower ends of the iron core are connected to the outer side wall of the steel sleeve or the inner side wall of the shield sleeve by welding or interference. When the liquid flows from the top of the rotor structure to the bottom, the welded or interfered parts are prone to rust due to water. When the motor is not working, the rotor may be stuck, which also affects the water quality of the water pump. At the same time, the production process of this structure is complex and the cost is high.

[0004] In summary, the rotor of the existing shield pump motor has the technical problem of easy rusting and causing motor operation failure. UTILITY MODEL CONTENTS

[0005] The utility model solves the technical problem that the rotor of the existing shield pump motor is prone to rust and causes motor operation failure

[0006] To solve the above problems, the utility model provides a shield pump motor rotor device, which comprises a rotor shaft and an iron core and winding assembly fixedly installed on the outer peripheral wall of the rotor shaft, a cylindrical shield sleeve is arranged on the outer peripheral wall of the iron core and winding assembly, front and rear plastic sealing layers are arranged on the two side end faces of the iron core and winding assembly respectively, and the front and rear plastic sealing layers are integrally connected with the shield sleeve.

[0007] The shielding pump rotor provided by the utility model is provided with an integrated protective layer outside the rotor core and winding structure to perform coating protection on the easy-to-rust structure in the rotor, and the front and rear plastic sealing layers and the shielding sleeve outer circumferential surface of the core winding are integrally connected and formed, which directly eliminates the space for the rotor core winding to contact with air, effectively eliminates the rusting condition from the root, effectively avoids the rotor from rusting and being stuck, and also avoids the deterioration of the water quality caused by rusting, and the design effectively solves the technical problem of the rotor of the existing shielding pump motor being easy to rust and causing motor operation failure.

[0008] As a preferred scheme, the shielding sleeve is integrally injection molded and connected with the front and rear plastic sealing layers.

[0009] As a preferred scheme, the rotor shaft is provided with a thrust bearing at one end of the front plastic sealing layer, and the thrust bearing is integrally injection molded and connected with the front plastic sealing layer.

[0010] As a preferred scheme, the thrust bearing is filled with an injection molding connecting layer between the outer circumferential wall of the rotor shaft.

[0011] As a preferred scheme, the outer end surface of the front plastic sealing layer is uniformly distributed with a plurality of convex rib structures along the direction from the rotor shaft to the edge of the front plastic sealing layer, and the convex rib structures are used to generate an axial thrust from the front plastic sealing layer to the rear plastic sealing layer when the rotor rotates. This design is mainly to reduce the wear of the bearing end surface of the thrust bearing. Specifically, when the rotor rotates at high speed, the convex rib structure works on the liquid in the rotor cavity, increases the liquid pressure at the front end of the rotor, i.e., the end where the convex rib structure is arranged, and exerts a reverse pressure on the rotor, effectively alleviating the axial force of the rotor to the front, reducing the wear rate of the bearing, protecting the rotor bearing / thrust bearing, and improving the service life of the motor.

[0012] As a preferred scheme, the convex rib structure is in a circular arc line shape, and the two ends of the convex rib structure are respectively communicated with the side wall of the thrust bearing and the edge of the front plastic sealing layer. This design uses fluid mechanics analysis to design the profile shape of the convex rib structure, so that the axial force of the rotor pushing away from the bearing end can be stably provided when the rotor rotates, and the stable axial thrust reduces friction.

[0013] The utility model also provides a shielding pump of the shielding pump motor rotor device of any one of the above, since the shielding pump motor rotor device has the above beneficial effect, the shielding pump with the shielding pump motor rotor device should also have the corresponding beneficial effect. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model provides a kind of external overall structure schematic diagram of shielding pump motor rotor device;

[0015] Figure 2 For Figure 1 The sectional structure schematic diagram of shielding pump motor rotor device;

[0016] Figure 3 For Figure 1 The end surface structure schematic diagram of shielding pump motor rotor device.

[0017] Among them, Figures 1-3 Among them:

[0018] 1, rotor shaft;2, front plastic sealing layer;3, rear plastic sealing layer;4, shielding sleeve;5, thrust bearing;6, convex rib structure;7, iron core and winding assembly;8, injection molding connecting layer. DETAILED DESCRIPTION

[0019] To make the technical means, creative features, purposes and effects realized by the utility model easy to understand, the utility model is further described below in conjunction with specific embodiments.

[0020] Before the working principle of the utility model is described in detail, the description of the utility model needs to be further explained and described: in the description of the utility model, it should be pointed out that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the utility model, it should be pointed out that, unless otherwise specified and limited, the terms "mounting", "provided with", "connection" and the like should be broadly understood, for example, "connection" can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can be directly connected, can be indirectly connected through an intermediate medium, or can be two element welding connection. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Reference Figures 1-3 The following examples are described as follows, Figure 1 An overall external structure schematic diagram of the shielding pump motor rotor device is provided in the utility model; Figure 2 An overall external structure schematic diagram of the shielding pump motor rotor device is provided in the utility model; Figure 1 A cross-sectional structure schematic diagram of the shielding pump motor rotor device is provided in the utility model; Figure 3 An overall external structure schematic diagram of the shielding pump motor rotor device is provided in the utility model; Figure 1 An end surface structure schematic diagram of the shielding pump motor rotor device is provided in the utility model.

[0023] The embodiment of the utility model provides a shielding pump motor rotor device, which comprises a rotor shaft 1 and a core and winding assembly 7 fixedly installed on the outer peripheral wall of the rotor shaft 1, the outer peripheral wall of the core and winding assembly 7 is attached with a cylindrical shielding sleeve 4, the two side end faces of the core and winding assembly 7 are respectively attached with a front plastic sealing layer 2 and a rear plastic sealing layer 3, and the front plastic sealing layer 2 and the rear plastic sealing layer 3 are integrally connected with the shielding sleeve 4.

[0024] The shielding pump rotor provided by the utility model is provided with an integrated protective layer outside the rotor core and winding structure, which can protect the easy-to-rust structure in the rotor in a cladding mode, and the front and rear plastic sealing layers and the shielding sleeve 4 of the outer circumferential surface of the core winding are integrally connected and formed, which directly eliminates the space for the external rotor core winding to contact with air, effectively eliminates the rusting condition from the root, effectively avoids the rusting of the rotor and the resulting jamming, and also avoids the deterioration of the water quality caused by rusting, and the above-mentioned design effectively solves the technical problem of the existing shielding pump motor rotor, which is easy to rust and causes motor operation failure.

[0025] In the technical scheme provided by the embodiment, the shielding sleeve 4 is integrally injection molded and connected with the front plastic sealing layer 2 and the rear plastic sealing layer 3. The design optimizes the connection mode between the front and rear plastic sealing layers and the shielding sleeve 4, and adopts the integrated injection molding mode to ensure that there is no air or water entering the gap in the rotor.

[0026] In the technical scheme provided by the embodiment, the rotor shaft 1 is provided with a thrust bearing 5 at one end of the front plastic sealing layer 2, and the thrust bearing 5 is integrally injection molded and connected with the front plastic sealing layer 2. Due to the axial force during the operation of the motor, the rotor will move axially, and the end surface of the rotor will abut against the bearing end surface on the corresponding side of the motor base or shell, so that friction will be generated between the two due to the relative movement, thereby causing wear and reducing the service life. The design reduces the friction by providing the thrust bearing 5 on the upper end surface of the rotor, and the structure isolates the end surface of the rotor shaft 1 from the inner surface of the motor shell, thereby effectively reducing the wear of the rotor.

[0027] In the technical scheme provided by the embodiment, the outer circumferential wall of the thrust bearing 5 and the rotor shaft 1 is filled with an injection molding connecting layer 8. The design optimizes the matching structure between the thrust bearing 5 and the rotor shaft 1. The same type of design is that the thrust bearing 5 is fixed by an interference rubber gasket and the shaft. This structure is prone to deformation due to the rubber gasket, so it can adapt to the deformation. One end of the rubber gasket will be slightly expanded and deformed, so that the rubber gasket and the thrust bearing 5 will be loose, affecting the stability of the connection of the thrust bearing 5, and causing the relative movement between the thrust bearing 5 and the rotor, thereby aggravating the wear between the thrust bearing 5 and the bearing and reducing the service life of the rotor. In the design, the outer circumferential wall of the thrust bearing 5 is integrally injection molded and connected with the front plastic sealing layer 2, and the inner circumferential wall is also connected and fixed with the rotor shaft 1 by injection molding, which fully ensures the firmness of the fixing of the thrust bearing 5.

[0028] In the technical scheme provided by the embodiment, the outer end surface of the front plastic sealing layer 2 is uniformly provided with a plurality of convex rib structures 6 along the circumference, the convex rib structures 6 are distributed along the direction from the rotor shaft 1 to the edge of the front plastic sealing layer 2, and the convex rib structures 6 are used to generate an axial thrust along from the front plastic sealing layer 2 to the rear plastic sealing layer 3 when the rotor rotates. The design is mainly to reduce the wear of the bearing surface of the thrust bearing 5. Specifically, when the rotor rotates at a high speed, the convex rib structures 6 work on the liquid in the rotor cavity, increase the liquid pressure at the front end of the rotor, i.e., the end provided with the convex rib structures 6, and apply a reverse pressure to the rotor, effectively relieving the axial force of the rotor in the forward direction, reducing the wear rate of the bearing, protecting the rotor shaft 1 and the thrust bearing 5, and improving the service life of the motor.

[0029] In the technical scheme provided by the embodiment, the convex rib structure 6 has a circular arc line shape, and the two ends of the convex rib structure 6 are respectively connected to the side wall of the thrust bearing 5 and the edge of the front plastic sealing layer 2. The design uses fluid mechanics analysis to design the profile shape of the convex rib structure 6, so as to ensure that the axial force of the rotor pushing away from the bearing end when the rotor rotates can be stably provided, and the stable axial thrust can reduce friction.

[0030] The embodiment of the utility model further provides a shield pump comprising the shield pump motor rotor device in any one of the above embodiments, since the shield pump motor rotor device has the above beneficial effects, the shield pump with the shield pump motor rotor device should also have corresponding beneficial effects.

[0031] Although the utility model discloses as above, the protection scope of the utility model disclosed is not limited to this only. The person skilled in the art can make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will all fall within the protection scope of the utility model.

Claims

1. A shielded pump motor rotor arrangement comprising a rotor shaft (1) and a core and winding assembly (7) fixedly mounted to the outer peripheral wall of the rotor shaft (1), characterised in that, The outer peripheral wall of the iron core and winding assembly (7) is attached with a cylindrical shielding sleeve (4), the two side end faces of the iron core and winding assembly (7) are respectively attached with a front plastic sealing layer (2) and a rear plastic sealing layer (3), and the front plastic sealing layer (2) and the rear plastic sealing layer (3) are integrally connected with the shielding sleeve (4).

2. The canned pump motor rotor apparatus of claim 1, wherein, The shielding sleeve (4) is integrally injection molded with the front plastic sealing layer (2) and the rear plastic sealing layer (3).

3. The canned pump motor rotor apparatus of claim 2, wherein, The rotor shaft (1) is sleeved with a thrust bearing (5) at one end of the front plastic sealing layer (2), and the thrust bearing (5) is integrally injection molded with the front plastic sealing layer (2).

4. The canned pump motor rotor apparatus of claim 3, wherein, The outer peripheral wall between the thrust bearing (5) and the rotor shaft (1) is filled with an injection connection layer (8).

5. The canned pump motor rotor apparatus of claim 3, wherein, The outer end face of the front plastic sealing layer (2) is uniformly distributed with a plurality of convex rib structures (6) along the circumference, the convex rib structures (6) are distributed along the direction from the rotor shaft (1) to the edge of the front plastic sealing layer (2), and the convex rib structures (6) are used to generate axial thrust along from the front plastic sealing layer (2) to the rear plastic sealing layer (3) when the rotor rotates.

6. The shielded pump motor rotor apparatus of claim 5, wherein, The convex rib structure (6) is in the shape of a circular arc line, and the two ends of the convex rib structure (6) are respectively connected with the side wall of the thrust bearing (5) and the edge of the front plastic sealing layer (2).

7. A canned pump comprising a rotor device and a stator device cooperating with each other, characterized in that, The rotor device is the shielding pump motor rotor device as claimed in any one of claims 1-6.

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