High-power magnetic drive pump capable of reducing magnetic eddy current loss

Abstract

The utility model discloses a high-power magnetic drive pump capable of reducing magnetic eddy current loss. The high-power magnetic drive pump comprises a pump body suction inlet, an impeller, a pump body discharge port, an isolation sleeve assembly, an outer magnetic assembly, an inner magnetic cylinder shielding sleeve, a bearing body, a cylindrical roller bearing, a deep groove ball bearing, a driving shaft, an inner magnetic cylinder, a rear sliding bearing, a front sliding bearing and a pump body. According to the high-power magnetic drive pump capable of reducing the magnetic eddy current loss, the line diameter ratio of the inner magnetic assembly to the outer magnetic assembly is increased, a deep groove ball bearing is replaced with the cylindrical roller bearing, the span between the cylindrical roller bearing and the deep groove ball bearing is lengthened, the radial length of the spacer sleeve assembly is reduced, and the thickness of the spacer sleeve assembly is reduced, so that the efficiency of the magnetic drive pump is improved; and the magnetic eddy current loss of the magnetic coupler is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of magnetic pumps, in particular to a high-power magnetic pump capable of reducing magnetic eddy current loss. Background Technique

[0002] A magnetic pump is a kind of leak-free pump. The driving component is driven by a motor, and then the driving component drives the inner magnetic cylinder and the rotor assembly through a magnetic field. The driving component is separated from the inner magnetic cylinder and the rotor by a static seal through an isolation sleeve. Therefore, compared with a centrifugal pump with a traditional mechanical seal form, it can achieve complete leak-free. There is no need to worry about causing public hazards and polluting the environment, and the physical health of on-site operators can be protected.

[0003] The key of a magnetic pump is the design of the magnetic coupling. The most important factor affecting the design of the magnetic coupling is the magnitude of the magnetic eddy current loss. Magnetic eddy current loss is a phenomenon in electromagnetic induction. When a conductor is in a changing magnetic field, an induced current will be generated in the conductor, resulting in energy loss. For a magnetic coupling with a conventional wire diameter ratio, the greater the power of the motor, the greater the magnetic eddy current loss of the selected magnetic coupling, resulting in low efficiency of the whole machine. Therefore, the magnetic pump has weak competitiveness compared with the same type of products under high-power working conditions. In order to improve the efficiency of the high-power magnetic pump, it is necessary to find a way to reduce the magnetic eddy current loss. Therefore, it is necessary to propose a high-power magnetic pump capable of reducing magnetic eddy current loss to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a high-power magnetic pump capable of reducing magnetic eddy current loss to solve the problem of large magnetic eddy current loss of the magnetic coupling of the existing magnetic pump.

[0005] The utility model provides a high-power magnetic pump capable of reducing magnetic eddy current loss, including: a pump body suction port, an impeller, a pump body discharge port, an isolation sleeve assembly, an outer magnetic assembly, an inner magnetic cylinder shielding sleeve, a bearing body, cylindrical roller bearings, deep groove ball bearings, a driving shaft, an inner magnetic cylinder, a rear sliding bearing, a front sliding bearing and a pump body;

[0006] The suction port of the pump body is arranged at one end of the pump body, and the discharge port of the pump body is arranged at the top of one side of the pump body. The impeller is arranged inside the pump body and is located inside the suction port of the pump body and below the discharge port of the pump body. The drive shaft is arranged inside the pump body and is connected to the impeller. The front sliding bearing and the rear sliding bearing are respectively arranged at the front and rear of the drive shaft. A bearing body is arranged outside the front sliding bearing and the rear sliding bearing, and a spacer sleeve assembly is arranged outside the bearing body. The outer magnetic assembly is arranged outside the spacer sleeve assembly, the inner magnetic cylinder shielding sleeve is arranged inside the spacer sleeve assembly, the inner magnetic cylinder is arranged inside the inner magnetic cylinder shielding sleeve, and an inner magnetic assembly is arranged inside the inner magnetic cylinder. The wire diameter ratio of the inner magnetic assembly to the outer magnetic assembly is 1.5:1. A cylindrical roller bearing and a deep groove ball bearing are sequentially arranged at the end of the drive shaft from front to back.

[0007] Further, the spacer sleeve assembly is made of metal material.

[0008] Further, an opening for an axle head nut is arranged at the front end of the drive shaft.

[0009] Further, a wear-resistant plate and a pump cover are arranged inside the impeller. A flow passage is arranged between the wear-resistant plate and the pump cover, and a flow passage is arranged between the impeller and the wear-resistant plate.

[0010] Further, a flow passage is arranged inside the drive shaft.

[0011] The utility model has the following beneficial effects: The high-power magnetic pump capable of reducing magnetic eddy current loss of the utility model increases the wire diameter ratio of the inner magnetic assembly to the outer magnetic assembly, replaces the deep groove ball bearing with a cylindrical roller bearing, increases the span between the cylindrical roller bearing and the deep groove ball bearing, reduces the radial length and thins the thickness of the spacer sleeve assembly, thereby improving the efficiency of the magnetic pump and reducing the magnetic eddy current loss of the magnetic coupling. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0013] Figure 1 It is a cross-sectional view of the high-power magnetic pump capable of reducing magnetic eddy current loss provided by the present utility model.

[0014] Illustration: 1 - Suction inlet of pump body; 2 - Opening for shaft head nut; 3 - Impeller; 4 - Discharge outlet of pump body; 5 - Flow channel at wear-resistant plate and pump cover; 6 - Isolation sleeve assembly; 7 - Outer magnetic assembly; 8 - Shielding sleeve of inner magnetic cylinder; 9 - Bearing body; 10 - Cylindrical roller bearing; 11 - Deep groove ball bearing; 12 - Drive shaft; 13 - Inner magnetic cylinder; 14 - Rear sliding bearing; 15 - Inner flow channel of pump shaft; 16 - Front sliding bearing. Detailed implementation manners

[0015] It should be noted that, without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The following will refer to the accompanying drawings and combine with the embodiments to detail the present utility model. It should be pointed out that the following detailed description is illustrative and aims to provide further description of the present application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present application belongs.

[0016] For the sake of convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above" etc. can be used here to describe the spatial position relationship between a device or feature shown in the figure and other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation shown in the figure of the device. For example, if the device in the figure is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned as "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientation of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations will be made for the spatial relative descriptions used here.

[0017] Now, the exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many different forms and should not be construed as being limited only to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of the present application is thorough and complete, and the concept of these exemplary embodiments is fully conveyed to those of ordinary skill in the art. In the drawings, for clarity, the thickness of layers and regions is enlarged, and the same reference numerals are used to denote the same devices, and thus their descriptions will be omitted.

[0018] Please refer to Figure 1, the present utility model provides a high-power magnetic pump capable of reducing magnetic eddy current loss, comprising: a pump body suction port 1, an impeller 3, a pump body discharge port 4, an isolation sleeve assembly 6, an outer magnetic assembly 7, an inner magnetic cylinder shielding sleeve 8, a bearing body 9, a cylindrical roller bearing 10, a deep groove ball bearing 11, a drive shaft 12, an inner magnetic cylinder 13, a rear sliding bearing 14, a front sliding bearing 16 and a pump body.

[0019] Among them, the pump body suction port 1 is arranged at one end of the pump body, the pump body discharge port 4 is placed at the top of one side of the pump body, the impeller 3 is arranged inside the pump body and is located inside the pump body suction port 1 and below the pump body discharge port 4; the drive shaft 12 is arranged inside the pump body and is connected to the impeller 3; the front sliding bearing 16 and the rear sliding bearing 14 are respectively arranged at the front and rear of the drive shaft 12; an outer bearing body 9 is arranged outside the front sliding bearing 16 and the rear sliding bearing 14, and an isolation sleeve assembly 6 is arranged outside the bearing body 9; the outer magnetic assembly 7 is arranged outside the isolation sleeve assembly 6, the inner magnetic cylinder shielding sleeve 8 is arranged inside the isolation sleeve assembly 6, the inner magnetic cylinder 13 is arranged inside the inner magnetic cylinder shielding sleeve 8, and an inner magnetic assembly is arranged inside the inner magnetic cylinder 13.

[0020] Magnetic eddy current loss mainly consists of aspects such as the thickness and outer diameter of the isolation sleeve, the resistivity of the isolation sleeve material, and the magnetic gap. The larger the wire diameter ratio, the more slender the magnetic coupler, and the smaller the magnetic loss. Thus, the inner diameter of the isolation sleeve will be smaller. The isolation sleeve is a key component to ensure the medium of the magnetic pump does not leak. To ensure the safety of pressure bearing, the thickness cannot be too thin. To reduce the resistivity, a metal material with low resistance and good pressure-bearing effect can be selected. The thickness of the isolation sleeve will also be thinned accordingly, thus affecting the size of the magnetic gap. The smaller the magnetic gap, the smaller the magnetic eddy current loss.

[0021] The wire diameter ratio of the inner magnetic assembly and the outer magnetic assembly 7 of the present utility model is 1.5:1, increasing the wire diameter ratio of the inner magnetic assembly and the outer magnetic assembly from 1:1 to 1.5:1, so that the magnetic eddy current loss will be reduced by half. The cylindrical roller bearing 10 and the deep groove ball bearing 11 are successively arranged at the end of the drive shaft 12 from front to back. Because the wire diameter ratio is increased, the cantilever of the outer magnetic assembly will be too long, increasing the load-bearing of the rolling bearing. To improve this situation, the present utility model increases the span between the two bearings and replaces the front bearing with a cylindrical roller bearing with better load-bearing effect. The isolation sleeve assembly 6 is made of metal material, and the present utility model adopts a metal material with high resistivity and high strength to thin the thickness of the isolation sleeve.

[0022] An axle head nut opening 2 is arranged at the front end of the drive shaft 12. Wear-resistant plates and a pump cover are arranged inside the impeller 3, a flow channel 5 between the wear-resistant plate and the pump cover is arranged between the wear-resistant plate and the pump cover, and a flow channel 17 between the impeller and the wear-resistant plate is arranged between the impeller 3 and the wear-resistant plate. A pump shaft inner flow channel 15 is arranged inside the drive shaft 12.

[0023] The high-power magnetic pump capable of reducing magnetic eddy current loss of the present utility model has three circulation paths:

[0024] Main circulation: The medium flows from the pump body suction port 1 through the impeller 3 to the pump body discharge port 4. This circulation is used to meet working conditions such as flow rate and head.

[0025] Second circulation: After the medium flows out of the impeller 3, it flows to the flow path 5 between the wear-resistant plate and the pump cover, then flows to the inner magnetic cylinder 13 and lubricates the rear sliding bearing 14, flows through the inner flow path 15 of the pump shaft, and finally flows through the opening 2 of the shaft head nut to the pump body suction port 1.

[0026] Third circulation: The medium flows from the flow path 17 between the impeller and the wear-resistant plate to lubricate the front sliding bearing 16, then flows to the inner flow path 15 of the pump shaft, and finally flows through the opening 2 of the shaft head nut to the pump body suction port 1.

[0027] In order to test the difference from the conventional magnetic coupler, the actual efficiencies of the two magnetic couplers will be compared through tests under the same motor, impeller, and pump body. Under the same motor and hydraulic conditions, operating at the same operating point, the efficiencies are compared. The magnetic pump of the present utility model has higher efficiency, so the magnetic eddy current loss of the magnetic coupler of the present utility model is smaller and the magnetic circuit design is more reasonable.

[0028] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular forms are also intended to include the plural forms. In addition, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0029] It should be noted that the terms "first", "second", etc. in the description, claims, and above-mentioned drawings of the present application are used to distinguish similar objects and do not necessarily need to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0030] The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. For those skilled in the art, the present utility model can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A high-power magnetic pump capable of reducing magnetic eddy current loss, characterized in that, Including: The pump body suction port (1), impeller (3), pump body discharge port (4), isolation sleeve assembly (6), outer magnetic assembly (7), inner magnetic cylinder shielding sleeve (8), bearing body (9), cylindrical roller bearing (10), deep groove ball bearing (11), drive shaft (12), inner magnetic cylinder (13), rear sliding bearing (14), front sliding bearing (16) and pump body; The pump body suction port (1) is arranged at one end of the pump body, the pump body discharge port (4) is arranged at the top of one side of the pump body, the impeller (3) is arranged inside the pump body and is located inside the pump body suction port (1) and below the pump body discharge port (4); the drive shaft (12) is arranged inside the pump body and is connected to the impeller (3); the front sliding bearing (16) and the rear sliding bearing (14) are respectively arranged at the front and rear of the drive shaft (12); the bearing body (9) is arranged outside the front sliding bearing (16) and the rear sliding bearing (14), and the isolation sleeve assembly (6) is arranged outside the bearing body (9); the outer magnetic assembly (7) is arranged outside the isolation sleeve assembly (6), the inner magnetic cylinder shielding sleeve (8) is arranged inside the isolation sleeve assembly (6), the inner magnetic cylinder (13) is arranged inside the inner magnetic cylinder shielding sleeve (8), an inner magnetic assembly is arranged inside the inner magnetic cylinder (13), and the wire diameter ratio of the inner magnetic assembly to the outer magnetic assembly (7) is 1.5:1; the cylindrical roller bearing (10) and the deep groove ball bearing (11) are successively arranged at the end of the drive shaft (12) from front to back.

2. The high-power magnetic pump capable of reducing magnetic eddy current loss according to claim 1, characterized in that The isolation sleeve assembly (6) is made of metal material.

3. A high-power magnetic pump capable of reducing magnetic eddy current losses according to claim 1, characterized in that, An axhead nut opening (2) is arranged at the front end of the drive shaft (12).

4. A high-power magnetic pump capable of reducing magnetic eddy current loss according to claim 1, characterized in that, A wear-resistant plate and a pump cover are arranged inside the impeller (3), a flow channel (5) between the wear-resistant plate and the pump cover is arranged between the wear-resistant plate and the pump cover, and a flow channel (17) between the impeller and the wear-resistant plate is arranged between the impeller (3) and the wear-resistant plate.

5. The high-power magnetic pump capable of reducing magnetic eddy current loss according to claim 1, characterized in that, A pump shaft inner flow channel (15) is arranged inside the drive shaft (12).

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