Leakage-free heavy load type magnetic force pump

Abstract

The utility model discloses a kind of heavy load type magnetic force pumps without leakage, including pump body, impeller and pump shaft, the impeller is connected on the pump shaft, this magnetic force pump is heavy load type structure, whole adopts building block type modularization installation, this magnetic force pump further includes: rotating part, contactless power transmission is realized with driving motor cooperation;The pump shaft is supported in the pump body interior by double sliding bearing, and the double sliding bearing is coaxial between the pump shaft. A kind of heavy load type magnetic force pump without leakage of the utility model, since completely canceling shaft seal, using static isolation sleeve seal and magnetic force drive, fundamentally eliminate the leakage approach, it is very suitable for conveying dangerous medium. The combination of heavy load type pump body and high-precision double sliding bearing support, so that pump can adapt to harsh working conditions such as high specific gravity, large viscosity, stable operation, long service life.

Description

Technical Field

[0001] This utility model relates to the field of fluid machinery technology, and in particular to a leak-free heavy-duty magnetic pump. Background Technology

[0002] Magnetic drive pumps, as a type of leak-free pump, are widely used in petroleum, chemical, pharmaceutical, and electroplating industries for conveying flammable, explosive, volatile, toxic, corrosive, and valuable liquids. Their basic principle is to transmit power to the impeller without contact via a magnetic coupler (internal and external magnetic rotors), thereby eliminating dynamic seals and achieving static seals (isolation sleeve seals), fundamentally solving the shaft seal leakage problem.

[0003] However, existing magnetic drive pumps still have shortcomings in some special operating conditions: First, when handling materials with high specific gravity and high viscosity, the radial and axial forces on the impeller increase, and ordinary bearing support systems cannot guarantee the dynamic stability of the rotor, easily generating vibration and noise, affecting the life of bearings and isolation sleeves, and in severe cases leading to friction and failure; Second, the hydraulic model of ordinary magnetic drive pumps may not be optimized for a wide range of operating conditions, resulting in a significant decrease in efficiency when handling non-clean water media, leading to high energy consumption; Third, traditional pumps have complex structures, making disassembly and maintenance inconvenient, especially when handling toxic or corrosive media, posing high safety risks during maintenance.

[0004] Based on the above-mentioned technical problems, those skilled in the art urgently need to develop a magnetic pump that has a simple structure, can guarantee absolutely no leakage, and has high load-bearing capacity, stable operation, high efficiency and energy saving, and is easy to maintain. Utility Model Content

[0005] The purpose of this invention is to provide a fully sealed, leak-free, heavy-duty magnetic pump that is particularly suitable for harsh working conditions and solves the problems of stable operation, high efficiency, and ease of maintenance.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] This utility model discloses a leak-free, heavy-duty magnetic pump, comprising a pump body, an impeller, and a pump shaft. The impeller is connected to the pump shaft. This magnetic pump has a heavy-duty structure and adopts a modular, building-block installation. The magnetic pump also includes:

[0008] The rotating part works with the drive motor to achieve contactless power transmission;

[0009] The pump shaft is supported inside the pump body by double sliding bearings, and the double sliding bearings are coaxial with the pump shaft.

[0010] Preferably, the pump body is made of carbon steel, stainless steel, or a special alloy.

[0011] Preferably, the rotating part includes an inner magnetic rotor assembly and an outer magnetic rotor assembly. An isolation sleeve is provided outside the inner magnetic rotor assembly to isolate the inner magnetic rotor assembly and the outer magnetic rotor assembly. The outer magnetic rotor assembly is connected to the output end of the drive motor.

[0012] Preferably, the double sliding bearing is made of a self-lubricating material or is lubricated by a pumped lubricating medium.

[0013] In the above technical solution, the leak-free heavy-duty magnetic pump provided by this utility model has the following beneficial effects:

[0014] This invention relates to a leak-free, heavy-duty magnetic pump. By completely eliminating the shaft seal and employing a static isolation sleeve seal and magnetic drive, leakage paths are fundamentally eliminated, making it ideal for conveying hazardous media. The combination of a heavy-duty pump body and high-precision double sliding bearing support enables the pump to adapt to harsh working conditions such as high specific gravity and high viscosity, ensuring stable operation and a long service life.

[0015] The extremely high rotor coaxiality and stable bearing support of this invention ensure smooth operation with extremely low vibration and noise levels; the modular design makes maintenance simple, fast and safe, greatly reducing downtime. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall cross-sectional structure of a leak-free heavy-duty magnetic pump provided for an embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures:

[0019] 1. Pump body; 2. Impeller; 3. Pump shaft; 4. Rotating part; 5. Double sliding bearing;

[0020] 401. Inner magnetic rotor assembly; 402. Outer magnetic rotor assembly; 403. Isolation sleeve. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] See Figure 1 As shown;

[0023] This utility model discloses a leak-free, heavy-duty magnetic pump, which includes:

[0024] The magnetic pump includes a pump body 1, an impeller 2, and a pump shaft 3. The impeller 2 is connected to the pump shaft 3. This magnetic pump has a heavy-duty structure and adopts a modular, building-block assembly. The magnetic pump also includes:

[0025] The rotating part 4 works with the drive motor to achieve contactless power transmission;

[0026] The pump shaft 3 is supported inside the pump body 1 by a double sliding bearing 5, and the double sliding bearing 5 is coaxial with the pump shaft 3.

[0027] Preferably, the pump adopts a modular design based on the principle of building blocks. Each core component (such as the bearing module, impeller chamber module, and magnetic drive module) is an independent, standard module. This design makes installation, maintenance, and component replacement extremely convenient, without requiring the disassembly of the entire pump body, thus reducing maintenance costs and risks.

[0028] The impeller 2 is fixed to the pump shaft 3, which is supported inside the pump body 1 by a pair of high-precision double sliding bearings 5. The fit clearance of these double sliding bearings 5 ​​is precision-machined and controlled to ensure extremely high coaxiality between the pump shaft 3 and the bearings 5. This support structure effectively suppresses rotor deflection and dynamic imbalance under high loads, thereby ensuring that the pump operates smoothly throughout the entire operating range without significant vibration or noise.

[0029] In addition, the impeller 2 adopts an excellent hydraulic model optimized by computational fluid dynamics (CFD), which reduces eddy currents and impact losses in the internal flow channel and significantly improves the overall efficiency and cavitation performance of the pump.

[0030] As a preferred technical solution in this embodiment, the pump body 1 is made of carbon steel, stainless steel or special alloy forging, and the wall thickness is significantly greater than that of a standard pump, forming a heavy-duty structure.

[0031] As a preferred technical solution in this embodiment, the rotating part 4 includes an inner magnetic rotor assembly 401 and an outer magnetic rotor assembly 402. An isolation sleeve 403 is provided on the outside of the inner magnetic rotor assembly 401 to isolate the inner magnetic rotor assembly 401 and the outer magnetic rotor assembly 402. The outer magnetic rotor assembly 402 is connected to the output end of the drive motor.

[0032] As a preferred technical solution in this embodiment, the double sliding bearing 5 is made of a self-lubricating material or lubricated by a pumped lubricating medium. The pump shaft 3 is supported within the pump body 1 by the double sliding bearing 5. The double sliding bearing 5 can be made of wear-resistant, self-lubricating materials such as silicon carbide, graphite, or polytetrafluoroethylene composite materials. The clearance between the bearing bore and the pump shaft 3 is precision machined and controlled within a very small range (8μm~30μm), thereby ensuring extremely high coaxiality.

[0033] Impeller 2 is mounted at the front end of pump shaft 3, and its blade profile is a high-efficiency hydraulic model optimized for a specific specific speed. The inner magnetic rotor assembly 401 is fixed to the rear end of pump shaft 3 and is completely enclosed within an isolation sleeve 6 made of non-magnetic materials (such as Hastelloy or 316L stainless steel). The outer magnetic rotor assembly 402 is connected to the output shaft of the drive motor. When the motor drives the outer magnetic rotor assembly 402 to rotate, the magnetic lines of force pass through the isolation sleeve 403, causing the inner magnetic rotor assembly 401, pump shaft 3, and impeller 2 to rotate synchronously, achieving contactless power transmission.

[0034] When maintenance is required, such as replacing the bearing or impeller 2, the outer magnetic rotor assembly 402 and the pump cover can be disassembled in sequence. The entire rotor component (including impeller 2, pump shaft 3, inner magnetic rotor 401 and bearing 7) can be taken out as a module or sub-module, which reflects the convenience of the modular design.

[0035] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A leak-free, heavy-duty magnetic pump, comprising a pump body (1), an impeller (2), and a pump shaft (3), wherein the impeller (2) is connected to the pump shaft (3), characterized in that, This magnetic pump features a heavy-duty structure and adopts a modular, building-block assembly method. The magnetic pump also includes: The rotating part (4) works with the drive motor to achieve contactless power transmission; The pump shaft (3) is supported inside the pump body (1) by a double sliding bearing (5), and the double sliding bearing (5) is coaxial with the pump shaft (3).

2. The leak-free heavy-duty magnetic pump according to claim 1, characterized in that, The pump body (1) is made of carbon steel, stainless steel or special alloy.

3. The leak-free heavy-duty magnetic pump according to claim 1, characterized in that, The rotating part (4) includes an inner magnetic rotor assembly (401) and an outer magnetic rotor assembly (402). An isolation sleeve (403) is provided on the outside of the inner magnetic rotor assembly (401) to isolate the inner magnetic rotor assembly (401) and the outer magnetic rotor assembly (402). The outer magnetic rotor assembly (402) is connected to the output end of the drive motor.

4. The leak-free heavy-duty magnetic pump according to claim 1, characterized in that, The double sliding bearing (5) is made of self-lubricating material or is lubricated by pumped lubricating medium.

Images