Water pump cooling structure and sewage pump

Abstract

The application provides a water pump cooling structure and a sewage pump, and relates to the technical field of water pump cooling. The water pump cooling structure comprises a motor shell, a flow guide cover and a cooling spacer sleeve. The cooling spacer sleeve is installed on the outer wall of the motor shell to form a cooling chamber between the cooling spacer sleeve and the motor shell. A plurality of backflow holes and a plurality of flow guide holes are arranged on the motor shell in an interval staggered manner. The backflow holes and the flow guide holes are located at the bottom of the cooling chamber. The flow guide cover is installed on the motor shell and forms a flow guide channel between the flow guide cover and the motor shell. The flow guide holes are located in the flow guide channel. A medium backflow cavity is formed at the bottom of the motor shell and is connected with the backflow holes and the flow guide holes. An impeller is arranged in the medium backflow cavity to enable the cooling medium to flow from the backflow holes to the flow guide holes. The sewage pump comprises the water pump cooling structure. The technical effect of improving the cooling effect of the water pump motor is achieved.

Description

Technical Field

[0001] This invention relates to the field of water pump cooling technology, and more specifically, to water pump cooling structures and sewage pumps. Background Technology

[0002] Currently, the cooling systems for sewage pumps on the market are either a completely encircling flow guide structure or a flow guide structure surrounded by two half-shells. However, such structures can cause stagnation of the cooling medium in certain areas, resulting in uneven cooling of the motor and thus uneven motor cooling.

[0003] The existing cooling method involves adding a circulating impeller inside the cooling chamber and pumping the cooling medium into the motor cooling jacket through pipes to cool the motor. However, this method results in uneven distribution of the cooling medium within the cooling jacket, and the cooling effect gradually deteriorates over time, potentially leading to failure of some motor windings. Summary of the Invention

[0004] The purpose of this invention is to provide a water pump cooling structure and a sewage pump to alleviate the technical problem of poor cooling effect of water pump motors in the prior art.

[0005] In a first aspect, embodiments of the present invention provide a water pump cooling structure, including a motor housing, a flow guide, and a cooling sleeve;

[0006] The cooling sleeve is installed on the outer wall of the motor housing to form a cooling chamber between the cooling sleeve and the motor housing;

[0007] The motor housing is provided with a plurality of return holes and a plurality of guide holes spaced at intervals. The return holes and guide holes are located at the bottom of the cooling chamber. The guide shroud is installed on the motor housing, and a guide channel is formed between the guide shroud and the motor housing. The guide holes are located in the guide channel.

[0008] The bottom of the motor housing is provided with a medium return cavity, a return hole and a guide hole; both are connected to the medium return cavity. An impeller is provided in the medium return cavity so that the cooling medium can flow from the return hole to the guide hole.

[0009] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the motor housing includes an upper housing and a lower housing, and the upper housing and the lower housing are connected to each other;

[0010] The upper housing has a motor cavity for supporting the stator and rotor, and a drive shaft is inserted into the rotor;

[0011] The cooling sleeve is connected to the upper housing, the medium return cavity is opened in the lower housing, and the impeller is sleeved on the drive shaft;

[0012] Both the upper housing and the lower housing are provided with the reflux hole and the guide hole.

[0013] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein a motor sealing cavity is provided inside the lower housing, the motor sealing cavity is located above the medium return cavity, and a sealing element is provided between the motor sealing cavity and the drive shaft.

[0014] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the lower housing is provided with a medium return channel and a medium guide channel, the return hole is connected to the medium return cavity through the medium return channel, and the guide hole is connected to the guide hole through the medium guide channel;

[0015] The diameter of the medium flow channel is larger than the diameter of the flow guide hole.

[0016] In conjunction with the first aspect, the present invention provides one possible implementation of the first aspect, wherein the cross-section of the aforementioned flow channel gradually decreases from one end near the flow hole to the other end.

[0017] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the height of the top of the aforementioned flow guide gradually decreases from one end to the other, so as to guide the cooling medium in the flow guide channel to one side.

[0018] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the cooling sleeve is provided with a plurality of heat dissipation ribs for increasing the heat dissipation area.

[0019] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the cooling bushing is provided with a liquid injection port, and the height of the liquid injection port is higher than the height of the stator.

[0020] In conjunction with the first aspect, the present invention provides a possible implementation of the first aspect, wherein the cooling sleeve is provided with an exhaust port, and the highest height of the liquid injection port is higher than the height of the exhaust port;

[0021] The height of the exhaust port is higher than the height of the stator.

[0022] Secondly, embodiments of the present invention provide a sewage pump, including the pump cooling structure.

[0023] Beneficial effects:

[0024] This invention provides a water pump cooling structure, including 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. Multiple return holes and multiple flow guide holes are spaced and staggered on the motor housing, located at the bottom of the cooling chamber. The flow guide shroud is installed on the motor housing, forming a flow guide channel between the shroud and the motor housing, with the flow guide holes located within the flow guide channel. A medium return cavity, return holes, and flow guide holes are provided at the bottom of the motor housing. Both are connected to the medium return cavity, and an impeller is installed within the medium return cavity to allow the cooling medium to flow from the return holes to the flow guide holes.

[0025] Specifically, when the water pump is working, the pump's drive shaft drives the impeller located in the medium return chamber to rotate. When the impeller rotates, it can draw in the cooling medium at the return hole, and then discharge the cooling medium through the guide hole. The cooling medium flows from the guide hole into the guide channel between the guide shroud and the motor housing. Then, the cooling medium moves upward along the guide channel. During the upward movement, the cooling medium can contact the outer wall of the motor housing, thereby cooling the stator winding inside the motor housing. Then, the cooling medium is discharged from the guide channel into the cooling chamber. In the cooling chamber, the cooling medium can contact the motor housing and the guide shroud, which can also cool the stator winding. At the same time, the temperature is transferred to the cooling sleeve for heat dissipation. The cooling medium in the cooling chamber can flow back from the return hole into the medium return chamber, and then be supplied back to the guide hole by the impeller for heat dissipation again, thereby achieving a better heat dissipation effect for the stator winding inside the motor housing.

[0026] This invention provides a sewage pump, including a pump cooling structure. The sewage pump has the advantages described above compared to existing technologies, which will not be elaborated further here. Attached Figure Description

[0027] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0028] Figure 1 A schematic diagram of a water pump cooling structure installed on a water pump, provided in an embodiment of the present invention;

[0029] Figure 2 A half-sectional view of the water pump cooling structure installed on the water pump according to an embodiment of the present invention;

[0030] Figure 3A schematic cross-sectional view of the water pump cooling structure installed on the water pump, as provided in an embodiment of the present invention.

[0031] icon:

[0032] 10 – Stator; 20 – Rotor; 30 – Drive shaft;

[0033] 100 – Motor housing; 101 – Upper housing; 102 – Lower housing; 103 – Motor cavity; 110 – Return hole; 120 – Guide hole; 130 – Medium return cavity; 131 – Impeller; 140 – Motor sealing cavity; 150 – Medium return channel; 160 – Medium guide channel;

[0034] 200 – Draft shield; 210 – Draft channel; 220 – Draft slope;

[0035] 300 – Cooling sleeve; 310 – Cooling chamber; 320 – Heat dissipation fins; 330 – Liquid inlet; 340 – Exhaust port. Detailed Implementation

[0036] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] In the description of this invention, 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," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0038] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0039] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0040] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0041] See Figure 1 , Figure 2 and Figure 3 As shown, this embodiment provides a water pump cooling structure, including a motor housing 100, a flow guide shroud 200, and a cooling sleeve 300; the cooling sleeve 300 is installed on the outer wall of the motor housing 100 to form a cooling chamber 310 between the cooling sleeve 300 and the motor housing 100; the motor housing 100 is provided with a plurality of return holes 110 and a plurality of flow guide holes 120 spaced apart and staggered, the return holes 110 and the flow guide holes 120 being located at the bottom of the cooling chamber 310, guiding... The flow shield 200 is mounted on the motor housing 100, and a flow channel 210 is formed between the flow shield 200 and the motor housing 100. The flow hole 120 is located in the flow channel 210. The bottom of the motor housing 100 is provided with a medium return cavity 130, a return hole 110 and a flow hole 120. Both are connected to the medium return cavity 130. An impeller 131 is provided in the medium return cavity 130 so that the cooling medium can flow from the return hole 110 to the flow hole 120.

[0042] Specifically, when the water pump is working, the drive shaft 30 of the water pump can drive the impeller 131 located in the medium return chamber 130 to rotate. When the impeller 131 rotates, it can draw in the cooling medium at the return hole 110, and then discharge the cooling medium into the guide hole 120. The cooling medium flows from the guide hole 120 into the guide channel 210 between the guide cover 200 and the motor housing 100. Then the cooling medium moves upward along the guide channel 210. During the upward movement, the cooling medium can contact the outer wall of the motor housing 100, thereby cooling the stator 10 winding inside the motor housing 100. Then, the cooling medium is discharged from the guide channel 210 into the cooling chamber 310. The cooling medium can contact the motor housing 100 and the guide shroud 200 in the cooling chamber 310, which can also cool the stator 10 winding and transfer the temperature to the cooling sleeve 300 for heat dissipation. The cooling medium in the cooling chamber 310 can flow back from the return hole 110 to the medium return cavity 130, and then be resupplied to the guide hole 120 by the impeller 131 for heat dissipation again, so that the stator 10 winding in the motor housing 100 can achieve a better heat dissipation effect.

[0043] In addition, multiple sets of return holes 110 and guide holes 120 are provided on the motor housing 100, and the return holes 110 and guide holes 120 are arranged alternately, so that multiple channels can perform cooling work at the same time. This can greatly promote the distribution of cooling medium in the cooling sleeve 300 to a greater extent, thereby achieving efficient cooling of the motor.

[0044] The motor housing 100 includes an upper housing 101 and a lower housing 102, which are connected to each other. The upper housing 101 has a motor cavity 103 for supporting the stator 10 and the rotor 20, and a drive shaft 30 is inserted into the rotor 20. The cooling sleeve 300 is connected to the upper housing 101, and the medium return cavity 130 is opened in the lower housing 102. The impeller 131 is sleeved on the drive shaft 30. Both the upper housing 101 and the lower housing 102 are provided with a return hole 110 and a guide hole 120.

[0045] It should be noted that the water pump cooling structure provided in this embodiment can be applied to different types of water pumps, such as sewage pumps. In use, the upper housing 101 is located above the lower housing 102, thereby ensuring that the liquid level of the cooling medium in the cooling chamber 310 is higher than the height of the stator 10 winding, so that the cooling medium can fully cool the stator 10 winding.

[0046] The lower housing 102 is provided with a motor sealing cavity 140, which is located above the medium return cavity 130. A seal is provided between the motor sealing cavity 140 and the drive shaft 30.

[0047] The lower housing 102 is provided with a medium return channel 150 and a medium guide channel 160. The return hole 110 is connected to the medium return cavity 130 through the medium return channel 150, and the guide hole 120 is connected to the guide hole 120 through the medium guide channel 160. The diameter of the medium guide channel 160 is larger than the diameter of the guide hole 120.

[0048] It should be noted that the density of the low-temperature cooling medium is higher than that of the high-temperature cooling medium. Therefore, the low-temperature cooling medium tends to settle at the bottom. When the water pump starts, the low-temperature cooling medium delivered into the cooling sleeve 300 will settle at the bottom. The low-temperature cooling medium can enter the medium return channel 150 through the return hole 110. Then, the cooling medium is drawn into the medium return chamber 130 through the medium return channel 150. Then, the cooling medium is sprayed into the medium guide channel 160 by the pressurized spray of the impeller 131. Then, it enters the guide hole 120 from the medium guide channel 160 and then enters the guide channel 210 from the guide hole 120. Through the guidance of the guide channel 210, the low-temperature cooling medium can be moved to the top of the cooling chamber 310. On the one hand, the low-temperature cooling medium can fully contact the outer wall of the motor housing 100 to remove more heat. On the other hand, the low-temperature cooling medium delivered to the top of the cooling chamber 310 can fully mix with the cooling medium in the cooling sleeve 300.

[0049] See Figure 1 , Figure 2 and Figure 3 As shown, in an optional embodiment, the cross-section of the flow guide channel 210 gradually decreases from one end near the flow guide hole 120 to the other. This arrangement gradually reduces the flow area of ​​the flow guide channel 210 formed between the flow guide cover 200 and the motor housing 100, increasing the flow velocity of the cooling medium and allowing it to remove heat from the motor housing 100 more quickly. Simultaneously, the small outlet at the top of the flow guide channel 210 can form a jet stream, which can quickly mix with the external liquid, reducing the cooling temperature.

[0050] In addition, the diameter of the medium flow channel 160 is larger than the diameter of the flow hole 120, which allows the liquid in the medium flow channel 160 to flow quickly into the flow channel 210, further increasing the flow rate of the cooling medium in the flow channel 210.

[0051] See Figure 1 , Figure 2 and Figure 3 As shown, in an optional embodiment, the height of the top of the flow guide shroud 200 gradually decreases from one end to the other, in order to guide the cooling medium in the flow guide channel 210 to one side.

[0052] Specifically, by gradually reducing the height of the top of the flow guide shroud 200 from one end to the other, a flow guide slope 220 is formed at the top of the flow guide shroud 200, which can guide the cooling medium to the return hole 110. This allows the cooling medium discharged from each flow guide channel 210 to correspond to a return hole 110, so that the cooling medium discharged from this flow guide channel 210 mainly flows to the corresponding return hole 110. The arrangement of multiple sets of return holes 110 and flow guide holes 120 promotes a more balanced distribution of cooling medium in the cooling sleeve 300.

[0053] See Figure 1 , Figure 2 and Figure 3 As shown, in an optional embodiment, the cooling sleeve 300 is provided with a plurality of heat dissipation ribs 320 for increasing the heat dissipation area.

[0054] Multiple heat dissipation ribs 320 are provided on the cooling sleeve 300. The heat dissipation ribs 320 increase the contact area between the cooling medium and the cooling sleeve 300, as well as the heat dissipation area between the cooling sleeve 300 and the outside, thereby improving the heat transfer speed. The cooling medium is cooled by natural heat dissipation from the surface of the cooling sleeve 300.

[0055] See Figure 1 , Figure 2 and Figure 3 As shown, in the optional embodiment, the cooling sleeve 300 is provided with a liquid injection port 330, and the height of the liquid injection port 330 is higher than the height of the stator 10.

[0056] The cooling sleeve 300 has an exhaust port 340, and the highest height of the liquid injection port 330 is higher than the height of the exhaust port 340; the height of the exhaust port 340 is higher than the height of the stator 10.

[0057] It should be noted that the exhaust port 340 of the cooling bushing 300 is located more than 10mm above the stator 10 winding core.

[0058] In addition, the maximum height of the injection port 330 is higher than that of the exhaust port 340 to ensure the convenience of adding the cooling medium. This ensures that the cooling medium can fully contact the motor heat dissipation position in the cooling sleeve 300, thereby ensuring uniform heat dissipation of the motor.

[0059] This embodiment provides a sewage pump, including a pump cooling structure.

[0060] Specifically, the sewage pump provided by this invention has the advantages of the above-mentioned water pump cooling structure compared with the prior art, which will not be elaborated here.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. Although the present invention 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water pump cooling structure, characterized in that, The utility model relates to a motor cooling device, including: Motor shell (100), fairing (200) and cooling spacer sleeve (300); The cooling spacer sleeve (300) is installed on the outer wall of the motor shell (100), so that the cooling cavity (310) is formed between the cooling spacer sleeve (300) and the motor shell (100); A plurality of backflow holes (110) and a plurality of guide holes (120) are arranged on the motor shell (100) in a staggered manner, the backflow holes (110) and the guide holes (120) are located at the bottom of the cooling cavity (310), the fairing (200) is installed on the motor shell (100), and the fairing (200) and the motor shell (100) form a guide channel (210), and the guide holes (120) are located in the guide channel (210); A medium backflow cavity (130) is formed in the bottom of the motor shell (100), the backflow holes (110) and the guide holes (120) are connected with the medium backflow cavity (130), and an impeller (131) is arranged in the medium backflow cavity (130), so that the cooling medium can flow from the backflow holes (110) to the guide holes (120); The height of the top of the fairing (200) gradually decreases from one end to the other end, so as to guide the cooling medium in the guide channel (210) to one side.

2. The water pump cooling structure according to claim 1, characterized by The motor shell (100) comprises an upper shell (101) and a lower shell (102), and the upper shell (101) and the lower shell (102) are connected with each other; The upper shell (101) has a motor cavity (103) for bearing a stator (10) and a rotor (20), and a driving shaft (30) is inserted into the rotor (20); The cooling spacer sleeve (300) is connected with the upper shell (101), the medium backflow cavity (130) is formed in the lower shell (102), and the impeller (131) is sleeved on the driving shaft (30); The backflow holes (110) and the guide holes (120) are formed in the upper shell (101) and the lower shell (102).

3. The water pump cooling structure according to claim 2, characterized by A motor sealing cavity (140) is arranged in the lower shell (102), the motor sealing cavity (140) is located above the medium backflow cavity (130), and a sealing element is arranged between the motor sealing cavity (140) and the driving shaft (30).

4. The water pump cooling structure according to claim 2, characterized by A medium backflow channel (150) and a medium guide channel (160) are arranged in the lower shell (102), the backflow holes (110) are communicated with the medium backflow cavity (130) through the medium backflow channel (150), and the guide holes (120) are communicated with the guide holes (120) through the medium guide channel (160); The caliber of the medium guide channel (160) is greater than the caliber of the guide holes (120).

5. The water pump cooling structure according to claim 4, characterized by The cross section of the guide channel (210) gradually decreases from one end close to the guide holes (120) to the other end.

6. The water pump cooling structure according to claim 1, characterized by A plurality of heat dissipation ribs (320) for increasing the heat dissipation area are arranged on the cooling sleeve (300).

7. The water pump cooling structure according to claim 1, characterized by A liquid injection port (330) is arranged on the cooling sleeve (300), and the height of the liquid injection port (330) is higher than the height of the stator (10).

8. The water pump cooling structure according to claim 7, characterized by An exhaust port (340) is arranged on the cooling sleeve (300), and the highest height of the liquid injection port (330) is higher than the height of the exhaust port (340). The height of the exhaust port (340) is higher than the height of the stator (10).

9. A sewage pump characterized by The water pump cooling structure comprises the water pump cooling structure according to any one of claims 1-8.

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