A heat dissipation housing for a circulating centrifugal pump

Abstract

This utility model discloses a heat dissipation shell for a circulating centrifugal pump, comprising: a shell body for guiding flow; a heat dissipation component disposed in the middle of the shell body for heat dissipation; the heat dissipation component includes a flow guiding cavity equidistantly disposed in the middle of the shell body, an outlet pipe and an inlet pipe connecting the two ends of the flow guiding cavity, a cooler connected in the middle of the outlet pipe, and a circulating pump connected to the end of the outlet pipe. It can solve the problems of the single heat dissipation structure of the shell: existing pump shells mostly use external in-line heat dissipation fins, which rely solely on air convection for heat dissipation during high-speed rotation, and the heat dissipation efficiency drops by more than 30% when the ambient temperature is >40℃; inefficient cooling path: some improvement schemes set a straight cooling channel in the pump shell interlayer, but due to the short residence time of the coolant and weak turbulence effect, the measured heat exchange area utilization rate is less than 45%; poor thermal management coordination: the problem of separate design of internal and external heat dissipation structures (no linkage between external fins and internal water channels).

Description

Technical Field

[0001] This utility model relates to the field of centrifugal pump technology, and in particular to a heat dissipation housing for a circulating centrifugal pump. Background Technology

[0002] In the field of industrial circulating centrifugal pumps, the heat generated by the pump body operating under high load for extended periods can lead to problems such as aging of seals, impeller damage, and accelerated bearing wear, directly affecting the lifespan of the equipment. Traditional heat dissipation solutions suffer from the following technical bottlenecks:

[0003] The heat dissipation structure is too simple: most existing pump casings use external in-line heat dissipation fins, which rely solely on air convection for heat dissipation when rotating at high speeds. When the ambient temperature is >40℃, the heat dissipation efficiency drops by more than 30%, which cannot meet the requirements of high-temperature working conditions such as chemical and metallurgical industries.

[0004] Inefficient cooling path: Some improvement schemes involve setting a straight cooling channel in the pump casing interlayer, but due to the short residence time of the coolant and the weak turbulence effect, the actual heat exchange area utilization rate is less than 45%.

[0005] Poor thermal management coordination: The separate design of the internal and external heat dissipation structures (no linkage between the external fins and the internal water channels) leads to a temperature gradient of >25℃ / cm on the outer shell, which induces local thermal stress cracks. Utility Model Content

[0006] This invention provides a heat dissipation housing for a circulating centrifugal pump, which can solve the problems mentioned in the background art.

[0007] This utility model provides a heat dissipation housing for a circulating centrifugal pump, comprising:

[0008] The outer casing is used for airflow guidance;

[0009] A heat dissipation component located in the middle of the outer casing for heat dissipation;

[0010] The heat dissipation assembly includes a flow guide cavity equidistantly arranged in the middle of the outer shell, an outlet pipe and an inlet pipe connecting the two ends of the flow guide cavity, a cooler connected in the middle of the outlet pipe, a circulation pump connected to the end of the outlet pipe, a control box connected to the bottom of the circulation pump, and heat dissipation fins arranged on the outside of the outer shell.

[0011] In a heat dissipation housing of a circulating centrifugal pump according to one embodiment of the present invention, the flow guiding cavity is spiral-shaped.

[0012] In a heat dissipation housing of a circulating centrifugal pump according to an embodiment of the present invention, the pitch ratio (P / D) of the guide cavity is 0.8-1.2, where P is the pitch of the guide cavity and D is the equivalent diameter of the guide cavity.

[0013] In a heat dissipation housing of a circulating centrifugal pump according to one embodiment of the present invention, both the inlet pipe and the outlet pipe are coated with an anti-corrosion coating.

[0014] In a heat dissipation housing of a circulating centrifugal pump according to one embodiment of the present invention, a control circuit board and a battery are installed in the middle of the control box, and the control circuit board is electrically connected to the circulating pump and the heat dissipation fins.

[0015] In a heat dissipation housing of a circulating centrifugal pump according to one embodiment of the present invention, the following further includes:

[0016] An NTC thermistor is disposed on the inner wall of the main body of the housing, and the NTC thermistor is electrically connected to the control circuit board.

[0017] In a heat dissipation housing of a circulating centrifugal pump according to one embodiment of the present invention, the heat dissipation fins and the housing body are an integral structure, and the fin inclination angle of the heat dissipation fins is 15°-25°.

[0018] The technical solutions provided in this application embodiment can include the following beneficial effects: This application designs a heat dissipation shell for a circulating centrifugal pump. By setting up heat dissipation components, it can solve the problem of the single heat dissipation structure of the shell: Existing pump shells mostly use external in-line heat dissipation fins, which rely solely on air convection for heat dissipation during high-speed rotation. When the ambient temperature is >40℃, the heat dissipation efficiency drops by more than 30%, which cannot meet the requirements of high-temperature working conditions such as chemical and metallurgical industries. Inefficient cooling path: Some improved solutions set up straight cooling channels in the pump shell interlayer, but due to the short residence time of the coolant and weak turbulence effect, the measured heat exchange area utilization rate is less than 45%. Poor thermal management coordination: The separate design of the internal and external heat dissipation structures (no linkage between the external fins and the internal water channels) leads to a shell temperature gradient >25℃ / cm, inducing the problem of local thermal stress cracks.

[0019] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments 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 based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the heat dissipation housing of a circulating centrifugal pump according to an embodiment of this application;

[0022] Figure 2 yes Figure 1Another perspective view of the heat dissipation casing of a circulating centrifugal pump;

[0023] Figure 3 yes Figure 1 A front view of the heat dissipation casing of a circulating centrifugal pump;

[0024] Figure 4 yes Figure 3 Side sectional view at point AA. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0027] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0028] like Figures 1 to 4As shown, this application provides a heat dissipation housing for a circulating centrifugal pump, including: a housing body 10 for guiding flow; a heat dissipation assembly 20 disposed in the middle of the housing body 10 for heat dissipation; the heat dissipation assembly 20 includes a flow guiding cavity 21 equidistantly disposed in the middle of the housing body 10, an outlet pipe 22 and an inlet pipe 23 connecting the two ends of the flow guiding cavity 21, a cooler 25 connected in the middle of the outlet pipe 22, a circulating pump 26 connected to the end of the outlet pipe 22, a control box 24 connected to the bottom of the circulating pump 26, and heat dissipation fins 27 disposed on the outside of the housing body 10.

[0029] After adopting the above technical solutions, the heat dissipation component 20, located in the middle of the outer shell 10, can solve the problem of the single heat dissipation structure of the outer shell during operation: existing pump shells mostly use external in-line heat dissipation fins, which rely solely on air convection for heat dissipation during high-speed rotation. When the ambient temperature is >40℃, the heat dissipation efficiency drops by more than 30%, which cannot meet the requirements of high-temperature working conditions such as chemical and metallurgical industries. Inefficient cooling path: some improvement solutions set a straight cooling channel in the pump shell interlayer, but due to the short residence time of the coolant and weak turbulence effect, the measured heat exchange area utilization rate is less than 45%. Poor thermal management coordination: the separate design of the internal and external heat dissipation structures (no linkage between the external fins and the internal water channel) leads to a shell temperature gradient >25℃ / cm, inducing local thermal stress cracks.

[0030] It should be noted that during the use of the outer casing 10, external heat dissipation is achieved through the heat dissipation fins 27. Then, the temperature of the outer casing 10 is detected by the NTC thermistor 28. When the temperature exceeds the set range value, feedback is sent to the control circuit board to control the start of the circulation pump 26 and the cooler 25. The circulation pump 26 circulates the cooling water in the outlet pipe 22 and the guide cavity 21. The water first passes through the cooler 25 for cooling and then enters the circulation pump 26 (model WKA1300). Next, the water is introduced into the inlet pipe 23 and finally into the guide cavity 21, dissipating the heat of the outer casing 10, reducing the operating temperature of the outer casing 10, further improving the heat dissipation effect, and ensuring that the external heat dissipation fins 27 and the internal guide cavity 21 work together to ensure heat dissipation efficiency.

[0031] It should be noted that during the use of the outer shell 10, according to the attached... Figure 1-2 It is known that the outer side of the main body 10 is provided with a liquid inlet 30, a liquid outlet 40 and a drive structure mounting bracket 50, wherein the drive structure mounting bracket 50 is used to connect the drive structure, the liquid inlet 30 is for liquid input, and the liquid outlet 40 is for liquid output, thereby ensuring that the main body 10 can operate normally.

[0032] In an optional embodiment, the flow guide cavity 21 is spiral-shaped. The spiral shape increases the residence time of the coolant and ensures sufficient heat exchange, while the straight channel has a short residence time of the coolant and insufficient heat exchange.

[0033] In an optional embodiment, the pitch ratio (P / D) of the guide cavity 21 is 0.8, where P is the pitch of the guide cavity 21 and D is the equivalent diameter of the guide cavity 21. When the pitch ratio of the guide cavity 21 is <0.8, the flow resistance is too large, and when it is >1.2, the turbulence effect is weakened. When the pitch ratio is 1.0, the coolant residence time reaches 8.2s, and the heat exchange efficiency is improved by 210% compared with the straight channel. When the pitch ratio is 0.9, the pump casing temperature gradient is reduced to 7℃ / cm, and the thermal stress is reduced by 40%.

[0034] The specific implementation parameters for the pitch ratio are as follows:

[0035] Pitch ratio range | Heat dissipation efficiency improvement rate | Flow resistance increase rate

[0036] 0.8-1.0 | 180%-220% | 15%-25%

[0037] 1.0-1.2 | 150%-180% | 8%-12%

[0038] In an optional embodiment, both the inlet pipe 23 and the outlet pipe 22 are coated with an anti-corrosion coating, wherein the anti-corrosion coating is a plasma-sprayed Al2O3-TiO2 composite coating to ensure its anti-corrosion function and further increase its service life.

[0039] In an optional embodiment, a control circuit board and a battery are installed in the middle of the control box 24, and the control circuit board is electrically connected to the circulation pump 26 and the heat dissipation fins 27. Through the configuration of the control box 24, the control circuit board and the battery can actively circulate and deliver the coolant in the guide cavity 21 during operation, so as to ensure the heat dissipation effect of the guide cavity 21.

[0040] In an optional embodiment, the system further includes an NTC thermistor 28 disposed on the inner wall of the housing body 10. The NTC thermistor 28 is electrically connected to the control circuit board. The NTC thermistor 28 is configured to activate the circulation pump 26 when T > 70°C and switch to standby mode when T < 50°C. At this time, heat dissipation is carried out normally through the heat sink 27, without the need to activate the circulation pump 26, thus saving energy. At the same time, when activated, the heat dissipation effect of the housing body 10 is further enhanced through the cooperation of the heat sink 27 and the circulation pump 26.

[0041] In an optional embodiment, the heat dissipation fins 27 and the outer shell body 10 are an integral structure, and the heat dissipation effect is best when the fin tilt angle of the heat dissipation fins 27 is 20°±1°, and the airflow disturbance is enhanced: the fin tilt angle matches the pump body rotation direction to form an axial-radial composite airflow.

[0042] When the fin tilt angle of the heat dissipation fin 27 is less than 15°, the airflow is laminated along the fin surface, and the convective heat transfer coefficient decreases. When the fin tilt angle of the heat dissipation fin 27 is greater than 25°, the tail vortex causes a sharp increase in pressure loss and a decrease in pump efficiency.

[0043] It should be noted that the liquid outlet pipe 22 and the liquid inlet pipe 23 can be arbitrarily changed in shape to adapt to the usage scenario of the outer shell 10. At the same time, the circulation pump 26 and the control box 24 are adapted and installed according to the usage scenario.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0045] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0047] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0048] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A heat dissipating housing for a circulating centrifugal pump, characterized in that include: The outer casing is used for airflow guidance; A heat dissipation component located in the middle of the outer casing for heat dissipation; The heat dissipation assembly includes a flow guide cavity equidistantly arranged in the middle of the outer shell, an outlet pipe and an inlet pipe connecting the two ends of the flow guide cavity, a cooler connected in the middle of the outlet pipe, a circulation pump connected to the end of the outlet pipe, a control box connected to the bottom of the circulation pump, and heat dissipation fins arranged on the outside of the outer shell.

2. A heat dissipating housing for a circulating centrifugal pump according to claim 1, characterized in that The flow guide cavity is spiral-shaped.

3. A heat dissipating housing for a circulating centrifugal pump according to claim 1, wherein The pitch ratio (P / D) of the flow guide cavity is 0.8-1.2, where P is the pitch of the flow guide cavity and D is the equivalent diameter of the flow guide cavity.

4. The heat dissipation housing of a circulating centrifugal pump according to claim 1, characterized in that, Both the inlet and outlet pipes are coated with an anti-corrosion coating.

5. The heat dissipation housing of a circulating centrifugal pump according to claim 1, characterized in that, The control box contains a control circuit board and a battery, and the control circuit board is electrically connected to the circulation pump and the heat sink fins.

6. The heat dissipation housing of a circulating centrifugal pump according to claim 5, characterized in that, Also includes: An NTC thermistor is disposed on the inner wall of the main body of the housing, and the NTC thermistor is electrically connected to the control circuit board.

7. The heat dissipation housing of a circulating centrifugal pump according to claim 1, characterized in that, The heat dissipation fins are an integral structure with the outer shell body, and the fin tilt angle of the heat dissipation fins is 15°-25°.

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