Pump body structure of internal circulation submersible pump
By setting heat dissipation fins on the bottom inner surface of the submersible pump cover and designing a medium return flow channel, the heat dissipation problem of the submersible pump when the medium is viscous is solved, and a more efficient motor heat dissipation effect is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- LEO GRP PUMP TECH CO LTD
- Filing Date
- 2025-06-19
- Publication Date
- 2026-05-01
AI Technical Summary
Existing submersible pumps are prone to clogging of the inlet and outlet channels of circulating tap water when the medium contains a large amount of particles or is relatively viscous, resulting in a reduction in the amount of medium and poor heat dissipation of the motor.
Heat dissipation fins are installed on the bottom inner surface of the submersible pump cover to form a medium return and flow guiding channel, and return and flow guiding holes are set on the motor end cover. Combined with the design of the separator and pump cover, the flow and contact area of the medium are enhanced.
It improves the flow rate and heat dissipation effect of the cooling medium, eliminates the dead water zone at the bottom of the pump cover, and enhances the heat dissipation performance of the motor.
Smart Images
Figure CN224187764U_ABST
Abstract
Description
Pump body structure of an internal circulation submersible pump Technical Field
[0001] This application relates to the technical field of submersible pump components, and in particular to the pump body structure of an internal circulation submersible pump. Background Technology
[0002] Submersible sewage pumps mainly use external circulating tap water to cool the motor. However, when the medium contains a lot of particles or is relatively viscous, long-term operation can cause blockages in the inlet and outlet channels of the circulating tap water, which will affect the amount of medium water and the motor's cooling effect.
[0003] Chinese patent application number 2024117706364 discloses a water pump cooling structure and a sewage pump. The water pump cooling structure includes a motor housing, a flow guide shroud, and a cooling partition. The cooling partition is installed on the outer wall of the motor housing to form a cooling chamber between the cooling partition and the motor housing. The motor housing has multiple return holes and multiple flow guide holes spaced at intervals. The return holes and flow guide holes are located at the bottom of the cooling chamber. The flow guide shroud is installed on the motor housing, and a flow guide channel is formed between the flow guide shroud and the motor housing. The flow guide holes are located within the flow guide channel.
[0004] The bottom of the motor housing is provided with a medium return cavity. Both the return hole and the guide hole are connected to the medium return cavity. An impeller is provided in the medium return cavity, and the cooling medium can flow from the return hole to the guide hole.
[0005] Regarding the aforementioned related technologies, the inventors discovered that the motor housing is divided into an upper housing and a lower housing. A pump cover is installed on the lower housing, and part of the medium return channel is located on the pump cover. However, there is a dead water area at the bottom of the pump cover, which prevents the cooling medium from being fully guided at the bottom of the pump cover. This results in a low flow rate of the cooling medium and a small contact area between the cooling medium and the bottom of the pump cover, thereby reducing the heat dissipation effect. Therefore, there are certain improvements to be made. Summary of the Invention
[0006] To improve heat dissipation, this application provides a pump body structure for an internal circulation submersible pump.
[0007] The pump body structure of the internal circulation submersible pump provided in this application adopts the following technical solution:
[0008] A pump body structure for an internal circulation submersible pump includes a motor end cover, a mechanical seal seat, a partition, and a pump cover. The mechanical seal seat, the partition, and the pump cover are mounted on the motor end cover. The partition is located between the mechanical seal seat and the pump cover. A medium return channel is formed between the pump cover and the partition, and a medium guide channel is formed between the mechanical seal seat and the partition. The motor end cover is provided with a return hole communicating with the medium return channel and a guide hole communicating with the medium guide channel. A plurality of heat dissipation fins are provided on the inner bottom surface of the pump cover.
[0009] Preferably, the middle part of the pump cover protrudes and extends towards one side of the separator to form a mechanical seal mounting position, and the width of a plurality of heat dissipation fins extends from the outer wall of the mechanical seal mounting position and the inner bottom surface of the pump cover to the inner wall surface of the pump cover.
[0010] Preferably, the middle part of the separator protrudes and extends towards the mechanical seal seat to form a circulating impeller mounting port, the circulating impeller mounting port is opposite to the mechanical seal mounting position, and the circulating impeller mounting port is connected to the medium guide channel and the medium return channel.
[0011] Preferably, the height of the heat dissipation fins is set to 3mm-5mm.
[0012] Preferably, the height of the heat dissipation fins is set to 5mm.
[0013] Preferably, a plurality of the heat dissipation fins are radially distributed around the center of the pump cover.
[0014] Preferably, a partition ring is provided on the bottom surface of the partition body, and the partition ring is coaxial with the center of the partition body.
[0015] Preferably, the width of the medium return channel is evenly distributed between the inner wall of the pump cover and the outer wall of the separator.
[0016] In summary, this application includes at least one of the following beneficial technical effects:
[0017] This application provides heat dissipation fins on the inner bottom surface of the pump cover. After the heated cooling medium is guided to the bottom surface of the pump cover, it can flow in close contact with the inner bottom surface of the pump cover, increasing the contact area between the cooling medium and the pump cover, improving the heat dissipation effect, eliminating the dead water area at the bottom of the pump cover, increasing the flow velocity of the cooling medium, and improving the heat dissipation effect. Attached Figure Description
[0018] Figure 1 is a schematic diagram of the first structure of the submersible pump.
[0019] Figure 2 is a schematic diagram of the second structure of the submersible pump.
[0020] Figure 3 is a schematic diagram of the pump body structure.
[0021] Figure 4 is a cross-sectional schematic diagram of the pump body structure.
[0022] Explanation of reference numerals in the attached drawings: 1. Motor end cover; 2. Mechanical seal seat; 3. Separator; 4. Pump cover; 5. Bearing seat; 6. Mechanical seal mounting position; 7. Medium return channel; 8. Medium guide channel; 9. Return hole; 10. Guide hole; 11. Circulating impeller mounting port; 12. Heat dissipation fins; 13. Separator ring. Detailed Implementation
[0023] The present application will be further described in detail below with reference to Figures 1-4.
[0024] A pump body structure for an internal circulation submersible pump, as shown in Figures 1 and 2, includes a motor end cover 1, a mechanical seal seat 2, a partition 3, and a pump cover 4. The mechanical seal seat 2 is mounted on the motor end cover 1 via a flange, and the partition 3 is mounted on the mechanical seal seat 2 via a flange. The partition 3 is located outside the mechanical seal seat 2, and the pump cover 4 is mounted on the motor end cover 1 via a flange. The pump cover 4 is located outside the partition 3, that is, the partition 3 is located between the mechanical seal seat 2 and the pump cover 4.
[0025] Referring to Figures 3 and 4, a bearing seat 5 is provided in the middle of the motor end cover 1. The bearing seat 5 is used to install the bearing, which is used for assembling the motor shaft. The mechanical seal seat 2 is used to install the mechanical seal in the middle. The pump cover 4 extends protruding towards the partition 3 from the middle to form a mechanical seal mounting position 6, which is used to install the mechanical seal. The motor shaft is respectively assembled on the bearing seat 5, the mechanical seal seat 2, and the mechanical seal mounting position 6 of the pump cover 4.
[0026] A medium return channel 7 is formed between the pump cover 4 and the partition 3, and a medium guide channel 8 is formed between the mechanical seal seat 2 and the partition 3. A return hole 9 communicating with the medium return channel 7 is provided on the motor end cover 1, and a guide hole 10 communicating with the medium guide channel 8 is provided on the motor end cover 1. The middle part of the partition 3 protrudes and extends towards the mechanical seal seat 2 to form a circulating impeller mounting port 11. The circulating impeller mounting port 11 is opposite to the mechanical seal mounting position 6. The circulating impeller mounting port 11 connects the medium guide channel 8 and the medium return channel 7. The circulating impeller is used to install the circulating impeller in the circulating impeller mounting port 11. The circulating impeller is mounted on the motor shaft and located in the circulating impeller mounting port 11. The circulating impeller is installed at the connection between the medium guide channel 8 and the medium return channel 7 to drive the cooling medium to flow along the medium return channel 7 towards the medium guide channel 8.
[0027] In order to eliminate the dead water area on the inner bottom surface of the pump cover 4, a number of heat dissipation fins 12 are provided on the inner bottom surface of the pump cover 4. The heat dissipation fins 12 are radially distributed around the center of the pump cover 4 and are evenly spaced. The surface of the heat dissipation fins 12 extends from the outer wall of the mechanical seal mounting position 6 and the inner bottom surface of the pump cover 4 to the inner wall surface of the pump cover 4.
[0028] In one embodiment, the height of the heat dissipation fins 12 is set to 3mm-5mm, and preferably the height of the heat dissipation fins 12 is set to 5mm.
[0029] It is worth noting that a partition ring 13 is provided on the bottom surface of the partition body 3, and the partition ring 13 is coaxial with the center of the partition body 3.
[0030] The width of the medium return channel 7 is evenly distributed between the inner wall of the pump cover 4 and the outer wall of the partition 3. The width of the medium return channel 7 can be evenly set at various positions, that is, the width between the side wall of the pump cover 4 and the side wall of the partition 3, the width between the bottom of the partition ring 13 and the inner bottom surface of the pump cover 4, and the width between the side wall of the partition 3 and the outer wall of the mechanical seal mounting position 6 are all the same or similar.
[0031] Therefore, by providing heat dissipation fins 12 on the inner bottom surface of the pump cover 4, the heated cooling medium is guided to the bottom surface of the pump cover 4, allowing the cooling medium to flow in close contact with the inner bottom surface of the pump cover 4, increasing the contact area between the cooling medium and the pump cover 4, and improving the heat dissipation effect. After the cooling medium passes through the heat dissipation fins 12, the turbulence formed by the cooling medium can also eliminate the dead water area at the bottom of the pump cover 4, increase the flow speed of the cooling medium, and improve the heat dissipation effect.
[0032] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A pump body structure for an internal circulation submersible pump, comprising a motor end cover (1), a mechanical seal seat (2), a partition (3), and a pump cover (4), wherein the mechanical seal seat (2), the partition (3), and the pump cover (4) are mounted on the motor end cover (1), the partition (3) is located between the mechanical seal seat (2) and the pump cover (4), a medium return channel (7) is formed between the pump cover (4) and the partition (3), a medium guide channel (8) is formed between the mechanical seal seat (2) and the partition (3), a return hole (9) communicating with the medium return channel (7) is provided on the motor end cover (1), and a guide hole (10) communicating with the medium guide channel (8) is provided on the motor end cover (1), characterized in that, The pump cover (4) has several heat dissipation fins (12) on its inner bottom surface.
2. The pump body structure of an internal circulation submersible pump according to claim 1, characterized in that, The pump cover (4) extends from the middle part toward the partition (3) to form a mechanical seal mounting position (6), and the surface of a plurality of heat dissipation fins (12) extends from the outer wall of the mechanical seal mounting position (6) and the inner bottom surface of the pump cover (4) to the inner wall surface of the pump cover (4).
3. The pump body structure of an internal circulation submersible pump according to claim 2, characterized in that, The middle part of the separator (3) protrudes and extends towards the mechanical seal seat (2) to form a circulating impeller mounting port (11). The circulating impeller mounting port (11) is opposite to the mechanical seal mounting position (6). The circulating impeller mounting port (11) connects the medium guiding channel (8) and the medium return channel (7).
4. The pump body structure of an internal circulation submersible pump according to claim 1, characterized in that, The height of the heat dissipation fins (12) is set to 3mm-5mm.
5. The pump body structure of an internal circulation submersible pump according to claim 3, characterized in that, The height of the heat dissipation fins (12) is set to 5mm.
6. The pump body structure of an internal circulation submersible pump according to claim 1, characterized in that, Several of the heat dissipation fins (12) are radially distributed around the center of the pump cover (4).
7. The pump body structure of an internal circulation submersible pump according to claim 1, characterized in that, The bottom surface of the separator (3) is provided with a convex separator ring (13), and the separator ring (13) is coaxial with the center of the separator (3).
8. The pump body structure of an internal circulation submersible pump according to claim 1, characterized in that, The width of the medium return channel (7) is evenly distributed between the inner wall of the pump cover (4) and the outer wall of the partition (3).