High-efficiency heat dissipation type centrifugal pump

Abstract

The application discloses a high-efficiency heat dissipation type centrifugal pump, and relates to the technical field of centrifugal pumps, which comprises a pump body and a driving motor, the pump body is internally provided with a pump cavity, the driving motor comprises a rotor which is rotatably arranged in a motor shell, the rotor is provided with a rotating shaft, the pump body and the motor shell are provided with cooling members at the corresponding side walls, and one end of the rotating shaft penetrating through the cooling member is provided with a centrifugal impeller which is rotatably arranged in the pump cavity. The application breaks through the limitation of traditional heat dissipation depending on the surface of the pump body or external fans, and constructs an internal-external double-circulation cooling system. On one hand, the heat of the bearing assembly and the rotating shaft region is directly taken away by liquid medium external circulation cooling, so that the bearing assembly and the rotating shaft located in the pump body are cooled; on the other hand, the internal-external double-circulation structure significantly improves the heat dissipation efficiency of the centrifugal pump, and effectively solves the temperature rise problem of the motor, the bearing and the mechanical seal during long-time high-speed rotation.

Description

Technical Field

[0001] This invention relates to the field of centrifugal pump technology, and more specifically, to a high-efficiency heat-dissipating centrifugal pump. Background Technology

[0002] The basic components of a centrifugal pump are a high-speed rotating impeller and a fixed volute-shaped pump casing. The impeller, which has several (usually 4 to 12) backward-curved blades, is fixed to the pump shaft and rotates at high speed along with the pump shaft by a motor. When the motor drives the impeller to rotate at high speed for a long time, its bearings, mechanical seals and the motor itself will generate a lot of heat.

[0003] Traditional heat dissipation methods mainly rely on natural convection cooling on the pump body surface, fan cooling, or external cooling water pipes. However, these methods suffer from low heat dissipation efficiency, complex structure, and inability to effectively dissipate heat from internal bearings and mechanical seals, resulting in poor internal heat dissipation. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides a high-efficiency heat-dissipating centrifugal pump.

[0005] The technical solution is as follows: A high-efficiency heat-dissipating centrifugal pump includes a pump body and a drive motor. The pump body has a pump chamber inside. The drive motor includes a rotor that is rotatably disposed in a motor housing. The rotor has a shaft. Cooling components are installed on the corresponding side walls of the pump body and the motor housing. A centrifugal impeller that is rotatably disposed in the pump chamber is installed at one end of the shaft that passes through the cooling components. The cooling component has a mounting cavity at its shaft center, in which a bearing assembly for rotating the shaft is installed. The cooling component has a cooling chamber inside, and multiple filter holes connecting the cooling chamber and the pump chamber are opened on the side wall of the cooling component near the centrifugal impeller. A connecting pipe connecting the pump body outlet to the cooling chamber is installed on the outer wall of the pump body. A suction impeller is installed on the outer wall of the shaft inside the cooling chamber. The suction impeller is used to draw the liquid medium in the pump chamber into the cooling chamber and discharge it through the connecting pipe to achieve heat exchange between the bearing assembly and the outer wall of the shaft.

[0006] Furthermore, a cleaning component is installed on the outer wall of the shaft inside the pump chamber. The cleaning component has a cleaning arm that mates with the side wall of the cooling component near the centrifugal impeller. The cleaning arm is used to clean the filter holes.

[0007] Furthermore, a fixed seat that mates with the rotating shaft is installed inside the motor housing. An oil storage chamber and a buffer chamber are opened at both ends inside the rotating shaft. An oil passage connecting the oil storage chamber and the buffer chamber is located inside the rotating shaft, and an oil return channel is formed on the outer wall of the oil passage.

[0008] Furthermore, a first through hole communicating with the oil storage chamber and a second through hole communicating with the oil return channel are provided on the outer wall of the shaft, and a connecting channel communicating with the buffer chamber and the oil return channel is formed inside the shaft.

[0009] Furthermore, the fixed base has a rotating cavity for the rotating shaft to rotate inside, and the inner wall of the rotating cavity has a first recycling ring groove that mates with the second through hole and a second recycling ring groove that mates with the first through hole.

[0010] Furthermore, oil seals are installed on both sides of the first and second recovery ring grooves, and a first oil tank communicating with the second recovery ring groove and a second oil tank communicating with the first recovery ring groove are installed at the fixed base.

[0011] Furthermore, a buffer assembly is installed inside the buffer chamber. The buffer assembly includes a piston that is slidably disposed within the buffer chamber. A spring is installed between the piston and the inner wall of the buffer chamber. The spring is used to provide elastic force to keep the piston pressed towards the oil passage.

[0012] Based on the above, the beneficial effects of the high-efficiency heat dissipation centrifugal pump of the present invention are as follows: By setting up a cooling component with a cooling chamber, the liquid medium in the pump chamber during the operation of the centrifugal impeller is actively drawn into the cooling chamber by the suction impeller. The liquid exchanges heat with the bearing assembly and the outer wall of the shaft in full contact within the cooling chamber, and then flows back to the pump body outlet through the connecting pipe, forming a closed-loop liquid circulation cooling system, thus achieving circulating heat dissipation.

[0013] The oil passages and return oil channels formed inside the shaft provide a channel for the circulation of the heat exchange medium. The heat exchange medium can enter the oil passage through the oil storage chamber, then flow along the axial direction of the oil passage, and exchange heat through the return oil channel. This can make full use of the internal space of the shaft for heat conduction, effectively absorbing and carrying away the heat generated by the shaft and rotor.

[0014] This invention breaks through the limitations of traditional methods that rely on heat dissipation from the pump body surface or external fans. It constructs a dual-circulation cooling system, with internal and external circulation. On the one hand, the external circulation of liquid medium directly removes heat from the bearing assembly and shaft area, thereby dissipating heat from the bearing assembly and shaft located inside the pump body. On the other hand, the internal circulation of heat exchange medium cools the shaft and bearing assembly by using the external heat exchange medium. This dual-circulation structure significantly improves the heat dissipation efficiency of the centrifugal pump and effectively solves the problem of temperature rise when the motor, bearings, and mechanical seals rotate at high speed for a long time. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the overall components of the present invention; Figure 2 This is a three-dimensional cross-sectional view of the overall components of the present invention; Figure 3 For the present invention Figure 2 Enlarged schematic diagram of component A in the middle; Figure 4 This is a schematic cross-sectional view of the cooling cavity of the present invention; Figure 5 This is a schematic diagram of the water-absorbing impeller and cleaning component of the present invention; Figure 6 This is a three-dimensional cross-sectional view of the rotating shaft and the fixed base of the present invention; Figure 7 This is a three-dimensional schematic diagram of the rotating shaft of the present invention.

[0016] The reference numerals in the appendix of this invention are as follows: 100. Pump body; 101. Pump chamber; 110. Centrifugal impeller; 120. Cooling component; 121. Cooling chamber; 122. Filter hole; 123. Mounting chamber; 130. Bearing assembly; 200. Drive motor; 210. Rotor; 220. Shaft; 221. Oil storage chamber; 2211. First through hole; 222. Oil passage; 223. Oil return passage; 224. Second through hole; 225. Buffer chamber; 226. Connecting passage; 230. Fixing seat; 231. First recovery ring groove; 232. Second recovery ring groove; 240. Oil seal; 250. First oil tank; 260. Second oil tank; 300. Suction impeller; 400. Cleaning component; 500. Buffer assembly; 510. Piston; 520. Spring. Detailed Implementation

[0017] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0018] The embodiments provided by the present invention will be described in detail below: like Figures 1 to 7 As shown, a high-efficiency heat-dissipating centrifugal pump includes a pump body 100 and a drive motor 200. The pump body 100 has a pump chamber 101 inside. The drive motor 200 includes a rotor 210 rotatably disposed in a motor housing. The rotor 210 has a rotating shaft 220. Cooling components 120 are installed on the corresponding side walls of the pump body 100 and the motor housing. A centrifugal impeller 110 rotatably disposed in the pump chamber 101 is installed at one end of the rotating shaft 220 that passes through the cooling component 120. The cooling component 120 has a mounting cavity 123 at its shaft center. A bearing assembly 130 for rotating the shaft 220 is installed in the mounting cavity 123. A cooling chamber 121 is opened inside the cooling component 120. Multiple filter holes 122 are opened on the side wall of the cooling component 120 near the centrifugal impeller 110, connecting the cooling chamber 121 and the pump chamber 101. A connecting pipe is installed on the outer wall of the pump body 100, connecting the water outlet of the pump body 100 and the cooling chamber 121. A water suction impeller 300 is installed on the outer wall of the shaft 220 inside the cooling chamber 121. The water suction impeller 300 is used to draw the liquid medium in the pump chamber 101 into the cooling chamber 121 and discharge it through the connecting pipe, so as to realize the heat exchange of the bearing assembly 130 and the outer wall of the shaft 220.

[0019] It should be noted that by setting a cooling component 120 with a cooling chamber 121, the liquid medium in the pump chamber 101 when the centrifugal impeller 110 is working is actively drawn to the cooling chamber 121 by the suction impeller 300. The liquid fully contacts the bearing assembly 130 and the outer wall of the rotating shaft 220 in the cooling chamber 121 for heat exchange, and then flows back to the water outlet of the pump body 100 through the connecting pipe, forming a closed-loop liquid circulation cooling system, thus realizing circulating heat dissipation.

[0020] Understandably, the filter hole 122 prevents impurities in the pump chamber 101 from entering the cooling chamber 121, thus avoiding blockage of the cooling chamber 121 and the connecting pipe.

[0021] In addition, the cooling component 120 integrates bearing installation function, which simplifies the overall structure and can dissipate heat from the outer wall of the bearing assembly 130. Compared with traditional external cooling pipes and fan cooling, the heat dissipation efficiency is significantly improved, and it can directly and precisely dissipate heat from the internal bearing assembly 130 and the shaft 220, solving the pain point of poor internal heat dissipation.

[0022] like Figures 1 to 7 As shown, a cleaning component 400 is installed on the outer wall of the rotating shaft 220 inside the pump chamber 101. The cleaning component 400 has a cleaning arm that cooperates with the side wall of the cooling component 120 near the centrifugal impeller 110. The cleaning arm is used to clean the filter hole 122.

[0023] It should be noted that a cleaning component 400 is added to one end of the rotating shaft 220 located in the pump chamber 101. The cleaning arm is used to dynamically clean the filter holes 122 on the cooling component 120. After the centrifugal pump has been running for a long time, impurities in the medium may clog the filter holes 122. The cleaning component 400 rotates with the rotating shaft 220 and can scrape or clean the debris on the surface of the filter holes 122 in real time, ensuring a stable liquid inflow into the cooling chamber 121. This ensures smooth circulation of liquid into the cooling chamber 121 and prevents cooling failure due to blockage, thereby improving the reliability of the centrifugal pump during long-term operation and the stability of the heat dissipation system.

[0024] like Figures 1 to 7 As shown, a fixed seat 230 that mates with the rotating shaft 220 is installed inside the motor housing. An oil storage chamber 221 and a buffer chamber 225 are opened at both ends inside the rotating shaft 220. An oil passage 222 connecting the oil storage chamber 221 and the buffer chamber 225 is provided inside the rotating shaft 220. An oil return passage 223 is formed on the outer wall of the oil passage 222.

[0025] The outer wall of the rotating shaft 220 is provided with a first through hole 2211 that communicates with the oil storage chamber 221 and a second through hole 224 that communicates with the oil return channel 223. The inside of the rotating shaft 220 is formed with a connecting channel 226 that connects the buffer chamber 225 and the oil return channel 223.

[0026] The fixed base 230 has a rotating cavity for the rotating shaft 220 to rotate inside. The inner wall of the rotating cavity has a first recycling ring groove 231 that cooperates with the second through hole 224 and a second recycling ring groove 232 that cooperates with the first through hole 2211.

[0027] Oil seals 240 are installed on both sides of the first recovery ring groove 231 and the second recovery ring groove 232. The oil seals 240 effectively seal the gap between the rotating shaft 220 and the external environment, preventing leakage of the heat exchange medium during the discharge process. This helps to maintain the integrity and reliability of the heat dissipation system and avoid motor failure caused by heat exchange medium leakage. A first oil tank 250 communicating with the second recovery ring groove 232 and a second oil tank 260 communicating with the first recovery ring groove 231 are installed at the fixed base 230.

[0028] Both the first oil tank 250 and the second oil tank 260 are used to store heat exchange medium, which can be hydraulic oil.

[0029] It should be noted that the oil passage 222 and the return oil passage 223 formed inside the rotating shaft 220 provide a channel for the circulation of the heat exchange medium. The heat exchange medium can enter the oil passage 222 through the oil storage chamber 221, then flow axially along the oil passage 222, and exchange heat through the return oil passage 223. This can make full use of the internal space of the rotating shaft 220 for heat conduction, effectively absorbing and carrying away the heat generated by the rotating shaft 220 and the rotor 210.

[0030] It is understandable that when the heat exchange medium flows in the return oil channel 223, it can further exchange heat with the side wall of the rotating shaft 220, which improves the heat dissipation efficiency, allowing the heat exchange medium to be discharged through the second through hole 224, thus completing a heat exchange cycle.

[0031] Furthermore, the oil storage chamber 221, oil passage 222, buffer chamber 225, connecting channel 226, second through hole 224, first recovery ring groove 231, oil seal 240, second recovery ring groove 232, first oil tank 250 and second oil tank 260 together form a complete heat exchange medium circulation path, ensuring the effective utilization of the heat exchange medium and improving the heat dissipation effect inside the rotating shaft 220.

[0032] In addition, the first recovery ring groove 231 and the second recovery ring groove 232 effectively prevent the leakage of heat exchange medium during the circulation process, ensuring the stability and reliability of the heat dissipation system.

[0033] like Figures 1 to 7 As shown, a buffer assembly 500 is installed inside the buffer chamber 225. The buffer assembly 500 includes a piston 510 that is slidably disposed in the buffer chamber 225. A spring 520 is installed between the piston 510 and the inner wall of the buffer chamber 225. The spring 520 is used to provide elastic force to keep the piston 510 pressed in the direction of the oil passage 222.

[0034] It should be noted that the buffer chamber 225 inside the rotating shaft 220 is connected to the oil passage 222, providing a channel for the discharge of the heat exchange medium. The internal pressure is regulated and released by the movement of the piston 510 to prevent damage to the rotating shaft 220 due to excessive pressure.

[0035] The spring 520 provides a spring force to press the piston 510 into the pressure relief chamber. When the heat exchange medium is discharged, the spring force of the spring 520 can ensure that the piston 510 can respond and move in a timely manner, thereby effectively regulating and releasing the pressure.

[0036] Specifically, when the shaft 220 rotates, the temperature rises. At this time, the heat exchange medium in the oil passage 222 is heated, causing the volume of the heat exchange medium to expand. As a result, it flows out of the oil passage 222 and into the buffer chamber 225 through the extrusion piston 510. The heat exchange medium in the buffer chamber 225 flows into the return oil passage 223 through the connecting channel 226. The return oil passage 223 exchanges heat with the heat exchange medium in the oil passage 222 and also exchanges heat with the outer wall of the shaft 220 until it enters the first recovery ring groove 231 through the second through hole 224. Then, it is squeezed into the second oil tank 260 by the first recovery ring groove 231 for circulating heat exchange.

[0037] This invention overcomes the limitations of traditional cooling methods that rely on surface heat dissipation of the pump body 100 or external fans. It constructs a dual-circulation cooling system, with internal and external circulation. On the one hand, the external circulation of liquid medium directly removes heat from the bearing assembly 130 and shaft 220, thereby dissipating heat from the bearing assembly 130 and shaft 220 located inside the pump body 100. On the other hand, the internal circulation of heat exchange medium cools the shaft 220 and bearing assembly 130 by using an external heat exchange medium. This dual-circulation structure significantly improves the heat dissipation efficiency of the centrifugal pump and effectively solves the problem of temperature rise when the motor, bearings, and mechanical seal rotate at high speed for a long time.

[0038] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of this template.

[0039] In the description of this invention, it should be understood that the terms "upper," "lower," "left," and "right," 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 the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on the invention. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "multiple" means two or more.

[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," etc., 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0041] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A high-efficiency heat-dissipating centrifugal pump, characterized in that, The pump includes a pump body (100) and a drive motor (200). The pump body (100) has a pump chamber (101) inside. The drive motor (200) includes a rotor (210) rotatably disposed in a motor housing. The rotor (210) has a shaft (220). A cooling element (120) is installed on the corresponding side wall of the pump body (100) and the motor housing. A centrifugal impeller (110) rotatably disposed in the pump chamber (101) is installed at one end of the shaft (220) that passes through the cooling element (120). The cooling component (120) has a mounting cavity (123) at its shaft center. A bearing assembly (130) for rotating shaft (220) is installed in the mounting cavity (123). A cooling cavity (121) is opened inside the cooling component (120). Multiple filter holes (122) connecting the cooling cavity (121) and the pump cavity (101) are opened on the side wall of the cooling component (120) near the centrifugal impeller (110). A connecting pipe connecting the water outlet of the pump body (100) and the cooling cavity (121) is installed on the outer wall of the pump body (100). A water suction impeller (300) is installed on the outer wall of the shaft (220) inside the cooling cavity (121). The water suction impeller (300) is used to draw the liquid medium in the pump cavity (101) into the cooling cavity (121) and discharge it through the connecting pipe to achieve heat exchange between the bearing assembly (130) and the outer wall of the shaft (220).

2. The high-efficiency heat-dissipating centrifugal pump according to claim 1, characterized in that, The rotating shaft (220) is mounted on the outer wall inside the pump chamber (101) with a cleaning component (400). The cleaning component (400) has a cleaning arm that cooperates with the side wall of the cooling component (120) near the centrifugal impeller (110). The cleaning arm is used to clean the filter holes (122).

3. The high-efficiency heat-dissipating centrifugal pump according to claim 1, characterized in that, The motor housing is equipped with a fixed seat (230) that mates with the rotating shaft (220). The rotating shaft (220) has an oil storage chamber (221) and a buffer chamber (225) at both ends. The rotating shaft (220) has an oil passage (222) that connects the oil storage chamber (221) and the buffer chamber (225). An oil return passage (223) is formed on the outer wall of the oil passage (222).

4. The high-efficiency heat-dissipating centrifugal pump according to claim 3, characterized in that, The outer wall of the rotating shaft (220) is provided with a first through hole (2211) communicating with the oil storage chamber (221) and a second through hole (224) communicating with the return oil channel (223). The inside of the rotating shaft (220) is formed with a connecting channel (226) connecting the buffer chamber (225) and the return oil channel (223).

5. A high-efficiency heat-dissipating centrifugal pump according to claim 4, characterized in that, The fixed base (230) has a rotating cavity for the rotating shaft (220) to rotate. The inner wall of the rotating cavity has a first recycling ring groove (231) that cooperates with the second through hole (224) and a second recycling ring groove (232) that cooperates with the first through hole (2211).

6. A high-efficiency heat-dissipating centrifugal pump according to claim 5, characterized in that, Oil seals (240) are installed on both sides of the first recovery ring groove (231) and the second recovery ring groove (232). A first oil tank (250) connected to the second recovery ring groove (232) and a second oil tank (260) connected to the first recovery ring groove (231) are installed at the fixed seat (230).

7. A high-efficiency heat-dissipating centrifugal pump according to claim 6, characterized in that, The buffer chamber (225) is equipped with a buffer assembly (500). The buffer assembly (500) includes a piston (510) that is slidably disposed in the buffer chamber (225). A spring (520) is installed between the piston (510) and the inner wall of the buffer chamber (225). The spring (520) is used to provide elastic force to keep the piston (510) pressed towards the oil passage (222).

Images