High-temperature-resistant magnetic force pump

Abstract

The utility model relates to a kind of high-temperature-resistant magnetic force pump, belong to magnetic force pump technical field.The high-temperature-resistant magnetic force pump, comprising: motor, the sealing support plate is fixedly connected with the inside central position of connecting cover, the connecting shaft fixedly connected with the impeller rotating shaft of pump body is rotationally connected in the sealing support plate;Wherein, the connecting cover includes the spiral blade fixedly connected on the surface of connecting shaft, the lower position of the connecting cover surface is communicated with liquid outlet, the liquid inlet and liquid outlet are communicated with external cooling liquid circulating device.The above-mentioned high-temperature-resistant magnetic force pump, sets up heat dissipation mechanism, and external cooling liquid is introduced into connecting cover by spiral blade, under the driving of motor, connecting shaft drives spiral blade to rotate, forced cooling liquid flows along set direction, by the setting of spiral blade, it can be agitated to cooling liquid, avoid dead zone, still can expand the contact area and contact time of connecting shaft and cooling liquid, improve the cooling effect to connecting shaft.

Description

Technical Field

[0001] This utility model relates to the field of magnetic pump technology, and in particular to a high-temperature resistant magnetic pump. Background Technology

[0002] A magnetic drive pump is a type of pump that uses a magnetic actuator to achieve contactless torque transmission, replacing dynamic seals with static seals to achieve a completely leak-free pump. It consists of three parts: a self-priming pump, a magnetic actuator, and an electric motor. The key component, the magnetic actuator, comprises an outer magnetic rotor, an inner magnetic rotor, and a non-magnetic isolation sleeve. It features excellent internal sealing and reduced energy consumption, among other advantages.

[0003] As shown in the reference case "A High-Temperature Resistant Magnetic Pump" (publication number CN222084734U), the pump includes a pump body. The pump body has a medium inlet at its front end and a medium outlet on its outer peripheral wall. A pump cover is fixedly and sealed to the rear end of the pump body, and a rotating shaft rotatably passes through the pump cover. An impeller is fixedly connected to one end of the rotating shaft inside the pump body, and a cylinder is rotatably sleeved on the rotating shaft. One end of the cylinder is fixedly and sealed to the pump cover, and the other end of the cylinder is fixedly connected to a motor via a connecting frame. The output shaft of the motor is fixedly connected to the rotating cylinder. When conveying high-temperature media, this invention connects the cylinder to a cooling water supply device via an inlet and outlet connector to introduce cooling water into the cylinder, thereby cooling the middle section of the rotating shaft. This effectively prevents the heat of the high-temperature medium from being transferred from the rotating shaft to the inner magnet, thus protecting the inner magnet and preventing it from demagnetizing due to high temperature. This ensures stable operation of the magnetic pump and provides good performance.

[0004] However, when the above-mentioned device is in use, the contact time between the shaft and the cooling water is short and the contact area is small when the cooling water cools the middle section of the shaft, resulting in a poor cooling effect on the shaft. Utility Model Content

[0005] Therefore, it is necessary to provide a high-temperature resistant magnetic pump to address the problems of short contact time and small contact area between the shaft and cooling water, resulting in poor cooling effect on the shaft.

[0006] A high-temperature resistant magnetic pump includes: a motor, one end of which is fixedly connected to a connecting cover, and the other end of which is fixedly connected to a pump body. The pump body has an inlet and an outlet. The connecting cover has a heat dissipation mechanism. A sealing support plate is fixedly connected to the center of the inside of the connecting cover. A connecting shaft, which is fixedly connected to the impeller shaft of the pump body, is rotatably connected inside the sealing support plate. The connecting cover includes helical blades fixedly connected to the surface of the connecting shaft. An inlet is connected to the upper part of the surface of the connecting cover, and an outlet is connected to the lower part of the surface of the connecting cover. The inlet and outlet are connected to an external coolant circulation device.

[0007] In one embodiment, the helical blade is disposed on the side of the sealing support plate near the pump body, and the helical blade is a metal sheet.

[0008] In one embodiment, heat sinks are evenly distributed on the surface of the connecting cover, and the heat sinks are also made of metal.

[0009] In one embodiment, the gap between the spiral blade and the inner wall of the connecting cover is 0.5-2mm, and the surface of the spiral blade is provided with guide grooves to enhance the turbulence of the coolant.

[0010] In one embodiment, both the inlet and outlet are equipped with temperature sensors, which are interlocked with an external coolant circulation device to control the flow rate.

[0011] In one embodiment, the heat sinks are arranged radially on the outer surface of the connecting cover, and square heat pipes are embedded inside.

[0012] In one embodiment, the helical blade is made of duplex stainless steel and has an alumina ceramic coating on its surface.

[0013] In one embodiment, the inner wall of the connecting cover is coated with a thermally conductive ceramic layer. Beneficial effects

[0014] The aforementioned high-temperature magnetic pump is equipped with a heat dissipation mechanism. External coolant is introduced into the connecting cover through spiral blades. Driven by the motor, the connecting shaft drives the spiral blades to rotate, forcing the coolant to flow in a set direction. The spiral blades can agitate the coolant, avoid dead zones, and increase the contact area and contact time between the connecting shaft and the coolant, thereby improving the cooling effect on the connecting shaft.

[0015] By installing heat sinks, the overall heat dissipation effect of the connecting shaft can be improved. The heat sinks have embedded heat pipes to improve thermal conductivity and ensure emergency heat dissipation capabilities under extreme operating conditions. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of the connecting cover of this utility model;

[0019] Figure 3 This is a cross-sectional view of the connecting cover of this utility model;

[0020] Figure 4 This is a schematic diagram of the spiral blade mounting structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the heat dissipation mechanism of this utility model.

[0022] Figure label:

[0023] 100, Motor; 200, Connecting cover; 210, Sealing support plate; 220, Connecting shaft; 300, Pump body; 400, Heat dissipation mechanism; 410, Spiral blade; 420, Liquid inlet; 430, Liquid outlet; 440, Heat sink. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0025] The following is combined Figures 1-5 This invention describes a high-temperature resistant magnetic pump.

[0026] In one embodiment, a high-temperature resistant magnetic pump includes: a motor 100, one end of which is fixedly connected to a connecting cover 200, and the other end of which is fixedly connected to a pump body 300. The pump body 300 is provided with an inlet and an outlet. The connecting cover 200 is provided with a heat dissipation mechanism 400. A sealing support plate 210 is fixedly connected at the center inside the connecting cover 200. A connecting shaft 220, which is fixedly connected to the impeller shaft of the pump body 300, is rotatably connected inside the sealing support plate 210. The connecting cover 200 includes a spiral blade 410 fixedly connected to the surface of the connecting shaft 220. An inlet 420 is connected to the upper part of the surface of the connecting cover 200, and an outlet 430 is connected to the lower part of the surface of the connecting cover 200. The inlet 420 and the outlet 430 are connected to an external coolant circulation device.

[0027] like Figure 1 , Figure 3 and Figure 4As shown, the spiral blade 410 is disposed on the side of the sealing support plate 210 near the pump body 300, and the spiral blade 410 is made of metal. Heat dissipation fins 440 are evenly distributed on the surface of the connecting cover 200, and the heat dissipation fins 440 are also made of metal. The gap between the spiral blade 410 and the inner wall of the connecting cover 200 is 0.5-2mm, and the surface of the spiral blade 410 is provided with guide grooves to enhance coolant turbulence. Temperature sensors are installed at both the inlet 420 and the outlet 430, and both are interlocked with the external coolant circulation device to control the flow rate. The spiral blade 410 is made of duplex stainless steel and has an alumina ceramic coating on its surface.

[0028] like Figure 1 and Figure 5 As shown, heat sinks 440 are arranged radially on the outer surface of the connecting cover 200, and square heat pipes are embedded inside. The inner wall of the connecting cover 200 is coated with a thermally conductive ceramic layer.

[0029] In this embodiment, the pump body 300 includes an impeller and a shaft. An outer magnetic rotor is fixedly connected to the output shaft of the motor 100. The outer magnetic rotor is rotatably connected inside the connecting cover 200. An isolation sleeve is fixedly connected to the sealing support plate 210 near the outer magnetic rotor. An inner magnetic rotor, fixedly connected to the connecting shaft 220, is rotatably connected inside the isolation sleeve. The outer and inner magnetic rotors are correspondingly arranged. The motor 100 drives the outer magnetic rotor to rotate. Under the action of magnetic force, the inner magnetic rotor drives the connecting shaft 220 to rotate, which in turn drives the impeller shaft to rotate, thereby driving the impeller to rotate. A magnetic coupler is used to transmit torque between the outer and inner magnetic rotors. The motor 100 drives the outer magnetic rotor to rotate, and the strong magnetic field drives the inner magnetic rotor, sealed inside the isolation sleeve, to rotate synchronously, thus driving the impeller. In the power transmission path, a static seal of the isolation sleeve completely isolates the pump medium from the external environment. For high-temperature media, leakage not only causes material loss and environmental pollution but also poses extremely high safety risks. The leak-free design fundamentally eliminates these risks. Both the inner and outer magnetic rotors use samarium cobalt magnets, with an operating temperature range of 250°C - 350°C, good corrosion resistance, and a flat demagnetization curve. The pump body 300, impeller, and other flow-through components must be made of materials resistant to high temperatures and media corrosion, such as stainless steel, high-temperature alloy steel, and ceramic coatings. Connections between components of the pump body 300 use high-temperature resistant metal gaskets or special high-temperature sealants to prevent leakage.

[0030] The spiral blades 410 are fixed to the surface of the connecting shaft 220, located between the isolation sleeve and the pump body 300. When rotating, they generate a centrifugal pump effect, driving the coolant to form turbulence. The coolant enters through the inlet 420, spirally flows along the guide groove, and washes against the inner wall of the transmission chamber before exiting through the outlet 430. A temperature sensor monitors the inlet and outlet temperature difference in real time, and the interlocking external circulation device dynamically adjusts the flow rate. If the temperature exceeds a threshold, the flow rate is increased to reduce heat dissipation; if it falls below the threshold, the flow rate is reduced to maintain stable heat dissipation. Residual heat not carried away by the circulating fluid is conducted to the outer shell through the thermally conductive ceramic layer. The heat pipes embedded in the heat sink 440 rapidly transfer heat to the fin tips through a liquid-gas phase change, where it is dissipated by air convection.

[0031] The outer magnetic rotor and the output shaft of the motor 100 are fitted with a thermoplastic interference fit, while the inner magnetic rotor and the connecting shaft 220 are secured with high-strength pins. Both the inner and outer magnetic rotors are vacuum-plated with titanium nitride to prevent corrosion of the samarium-cobalt magnets by high-temperature media. A flexible graphite spiral wound gasket is placed between the pump body 300 and the flange of the connecting cover 200 to improve the sealing effect. The sealing support plate 210 has an annular structure made of high-temperature resistant polyimide composite material. It achieves a dynamic seal with the inner wall of the connecting cover 200 via an O-ring, allowing the connecting shaft 220 to rotate freely while blocking coolant.

[0032] Working principle: The output shaft of motor 100 drives the connecting shaft 220 to rotate, which in turn drives the spiral blades 410 to rotate synchronously within the connecting cover 200. External coolant is injected into the cavity of the connecting cover 200 through the inlet 420. The rotation of the spiral blades 410 generates centrifugal pumping force, causing the coolant to form a spiral turbulence along the blade guide grooves. It flows tightly against the inner wall of the ceramic-coated layer with a gap of 0.5-2mm. The coolant absorbs the heat conducted by the pump body 300 through the connecting shaft 220, and after heating up, it is discharged from the outlet 430, completing the circulation of the coolant. Through the circulation of the coolant, the connecting shaft 220 is continuously cooled. Residual heat is discharged through the radial heat sinks 440 on the outer wall of the connecting cover 200. The liquid metal in the square heat pipes embedded in the heat sinks 440 quickly transfers the heat to the top of the heat sinks 440, where it exchanges heat with the air, completing the heat dissipation. By combining active and passive heat dissipation, the heat dissipation effect is improved. The spiral blades 410 drive the coolant to form forced convection for active heat dissipation, while the heat sinks 440 on the outer wall of the connecting cover 200 transfer heat through heat pipe phase change and combine it with natural air convection for passive heat dissipation. This improves the high temperature resistance of the magnetic pump and extends its service life.

[0033] It should be noted that the motor 100, connecting cover 200 and pump body 300 mentioned above are all components with relatively mature existing technology. The specific models can be selected according to actual needs. At the same time, the motor 100 can be powered by mains power. The specific power supply method can be selected according to the situation, which will not be elaborated here.

[0034] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A high-temperature resistant magnetic pump, characterized in that, include: A motor (100) is fixedly connected to a connecting cover (200) at one end, and a pump body (300) is fixedly connected to the other end of the connecting cover (200). The pump body (300) is provided with an inlet and outlet. A heat dissipation mechanism (400) is provided on the connecting cover (200). A sealing support plate (210) is fixedly connected in the center of the connecting cover (200). A connecting shaft (220) that is fixedly connected to the impeller shaft of the pump body (300) is rotatably connected inside the sealing support plate (210). The connecting cover (200) includes a spiral blade (410) fixedly connected to the surface of the connecting shaft (220). The upper part of the surface of the connecting cover (200) is connected to a liquid inlet (420), and the lower part of the surface of the connecting cover (200) is connected to a liquid outlet (430). The liquid inlet (420) and the liquid outlet (430) are connected to an external coolant circulation device.

2. The high-temperature resistant magnetic pump according to claim 1, characterized in that, The spiral blade (410) is disposed on the side of the sealing support plate (210) near the pump body (300), and the spiral blade (410) is made of metal sheet.

3. The high-temperature resistant magnetic pump according to claim 1, characterized in that, The surface of the connecting cover (200) is uniformly distributed with heat sinks (440), and the heat sinks (440) are also made of metal.

4. The high-temperature resistant magnetic pump according to claim 1, characterized in that, The gap between the spiral blade (410) and the inner wall of the connecting cover (200) is 0.5-2mm, and the surface of the spiral blade (410) is provided with a guide groove to enhance the turbulence of the coolant.

5. The high-temperature resistant magnetic pump according to claim 1, characterized in that, Both the inlet (420) and outlet (430) are equipped with temperature sensors, which are interlocked with the external coolant circulation device to control the flow rate.

6. The high-temperature resistant magnetic pump according to claim 3, characterized in that, The heat sink (440) is arranged radially on the outer surface of the connecting cover (200), and a square heat pipe is embedded inside.

7. The high-temperature resistant magnetic pump according to claim 1, characterized in that, The spiral blade (410) is made of duplex stainless steel and has an alumina ceramic coating on its surface.

8. The high-temperature resistant magnetic pump according to claim 1, characterized in that, The inner wall of the connecting cover (200) is coated with a thermally conductive ceramic layer.

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