Water pump cooling structure and sewage pump

Abstract

The invention 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 bush. The cooling spacer bush is mounted on the outer wall of the motor shell, so that a cooling cavity is formed between the cooling spacer bush and the motor shell; a plurality of backflow holes and a plurality of flow guide holes are formed in the motor shell at intervals in a staggered mode, the backflow holes and the flow guide holes are located at the bottom in the cooling cavity, the flow guide cover is installed on the motor shell, a flow guide channel is formed between the flow guide cover and the motor shell, and the flow guide holes are located in the flow guide channel; a medium backflow cavity, a backflow hole and a flow guide hole are formed in the bottom of the motor shell; and an impeller is arranged in the medium backflow cavity, so that the cooling medium can flow to the flow guide hole from the backflow hole. The sewage pump comprises a water pump cooling structure. The technical effect of improving the cooling effect of the water pump motor is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of water pump cooling, in particular to a water pump cooling structure and a sewage pump. Background Art

[0002] The cooling system of sewage pumps in the current market is either a guide structure surrounded by a whole circle or a guide structure surrounded by two half shells. However, this type of structure will cause the cooling medium to stagnate in certain specific areas, resulting in uneven cooling effect of the cooling medium on the motor, which in turn causes unbalanced cooling of the motor.

[0003] The existing cooling method is to add a circulating impeller inside the medium chamber and pump the cooling medium into the motor cooling jacket through a pipeline to cool the motor. However, this method will cause the cooling medium to be unevenly distributed in the cooling jacket, and the cooling effect will gradually deteriorate as the running time increases, which may cause some motor windings to fail. Summary of the invention

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

[0005] In a first aspect, an embodiment of the present invention provides a water pump cooling structure, including a motor housing, a shroud and a cooling sleeve;

[0006] The cooling sleeve is mounted on the outer wall of the motor housing so that a cooling chamber is formed 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 at intervals and in a staggered manner, the return holes and the guide holes are located at the bottom of the cooling chamber, the guide cover is installed on the motor housing, and a guide channel is formed between the guide cover and the motor housing, and the guide holes are located in the guide channel;

[0008] A medium reflux cavity, a reflux hole and a guide hole are provided at the bottom of the motor housing; both are connected to the medium reflux cavity, and an impeller is provided in the medium reflux cavity so that the cooling medium can flow from the reflux hole to the guide hole.

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

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

[0011] The cooling sleeve is connected to the upper shell, the medium reflux chamber is opened in the lower shell, and the impeller is sleeved on the driving shaft;

[0012] The upper shell and the lower shell are both provided with the return hole and the guide hole.

[0013] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a motor sealing chamber is arranged in the lower shell, the motor sealing chamber is located above the medium reflux chamber, and a seal is arranged between the motor sealing chamber and the drive shaft.

[0014] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein a medium reflux channel and a medium guide channel are provided in the lower shell, the reflux hole is connected with the medium reflux cavity through the medium reflux channel, and the guide hole is connected with the guide hole through the medium guide channel;

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

[0016] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the cross-section of the above-mentioned guide channel gradually decreases from one end close to the guide hole to the other end.

[0017] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein the height of the top of the above-mentioned air guide cover gradually decreases from one end to the other end, so as to guide the cooling medium in the air guide channel to one side.

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

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

[0020] In combination with the first aspect, an embodiment of the present invention provides a possible implementation of the first aspect, wherein an exhaust port is provided on the cooling sleeve, and the highest height of the 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] In a second aspect, an embodiment of the present invention provides a sewage pump, including the water pump cooling structure.

[0023] Beneficial effects:

[0024] An embodiment of the present invention provides a water pump cooling structure, including a motor housing, a guide cover and a cooling sleeve; 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; a plurality of return holes and a plurality of guide holes are staggered and arranged on the motor housing, the return holes and the guide holes are located at the bottom of the cooling chamber, the guide cover is installed on the motor housing, and a guide channel is formed between the guide cover and the motor housing, and the guide holes are located in the guide channel; a medium return chamber, a return hole and a guide hole are opened at the bottom of the motor housing; both are connected to the medium return chamber, and an impeller is arranged in the medium return chamber to enable the cooling medium to flow from the return hole to the guide hole.

[0025] Specifically, when the water pump is working, the driving shaft of the water pump can drive the impeller located in the medium reflux chamber to rotate. When the impeller rotates, it can suck in the cooling medium at the reflux hole, and then discharge the cooling medium to the guide hole. The cooling medium flows from the guide hole into the guide channel between the guide cover and the motor housing, and 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 in 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 cover, and 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 reflux hole to the medium reflux chamber, and then be re-supplied to the guide hole by the impeller to re-perform heat dissipation, thereby achieving a better heat dissipation effect for the stator winding in the motor housing.

[0026] The embodiment of the present invention provides a sewage pump, including a water pump cooling structure. Compared with the prior art, the sewage pump has the above advantages, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

[0029] Figure 2 A half-section view of a water pump cooling structure provided by an embodiment of the present invention installed on a water pump;

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

[0031] icon:

[0032] 10-stator; 20-rotor; 30-drive shaft;

[0033] 100 - motor housing; 101 - upper housing; 102 - lower housing; 103 - motor cavity; 110 - reflux hole; 120 - flow guide hole; 130 - medium reflux cavity; 131 - impeller; 140 - motor sealing cavity; 150 - medium reflux channel; 160 - medium flow guide channel;

[0034] 200 - deflector cover; 210 - deflector channel; 220 - deflector slope;

[0035] 300 - cooling sleeve; 310 - cooling chamber; 320 - heat dissipation ribs; 330 - liquid injection port; 340 - exhaust port. DETAILED DESCRIPTION

[0036] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The present invention is further described in detail below through specific embodiments in conjunction with the accompanying drawings.

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

[0042] Specifically, when the water pump is working, the driving 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 suck the cooling medium at the return hole 110, and then discharge the cooling medium to 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, and 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 in the motor housing 100. Then the cooling medium is discharged from the guide channel 210 into the cooling chamber 310, and the cooling medium can contact the motor housing 100 and the guide cover 200 in the cooling chamber 310, and can also cool the stator 10 winding, and at the same time transfer the temperature to the cooling sleeve 300 for heat dissipation. The cooling medium in the cooling chamber 310 can flow back from the reflow hole 110 to the medium reflow chamber 130, and then be re-supplied to the guide hole 120 by the impeller 131 to re-perform heat dissipation work, so that the stator 10 winding in the motor housing 100 can achieve better heat dissipation effect.

[0043] In addition, a plurality of groups of return holes 110 and guide holes 120 are arranged on the motor housing 100, and the return holes 110 and the guide holes 120 are arranged alternately at intervals, so that multiple channels can perform cooling work at the same time, which can promote the distribution of cooling medium in the cooling sleeve 300 to a great extent and achieve efficient cooling of the motor.

[0044] Among them, the motor housing 100 includes an upper shell 101 and a lower shell 102, and the upper shell 101 and the lower shell 102 are connected to each other; the upper shell 101 has a motor cavity 103 for carrying the stator 10 and the rotor 20, and a drive shaft 30 is inserted on the rotor 20; the cooling sleeve 300 is connected to the upper shell 101, the medium reflux chamber 130 is opened in the lower shell 102, and the impeller 131 is sleeved on the drive shaft 30; both the upper shell 101 and the lower shell 102 are provided with a reflux 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, and when in use, the upper shell 101 is located above the lower shell 102, thereby ensuring that the liquid level of the cooling medium in the cooling chamber 310 can be higher than the height of the stator 10 winding, so that the cooling medium can fully cool the stator 10 winding.

[0046] A motor sealing chamber 140 is disposed in the lower shell 102 . The motor sealing chamber 140 is located above the medium reflux chamber 130 . A sealing member is disposed between the motor sealing chamber 140 and the drive shaft 30 .

[0047] Among them, a medium reflux channel 150 and a medium diversion channel 160 are arranged in the lower shell 102, the reflux hole 110 is connected with the medium reflux chamber 130 through the medium reflux channel 150, and the diversion hole 120 is connected with the diversion hole 120 through the medium diversion channel 160; the caliber of the medium diversion channel 160 is larger than the caliber of the diversion hole 120.

[0048] It should be pointed out that the density of the cooling medium with a low temperature is higher than that of the cooling medium with a high temperature, so the cooling medium with a low temperature tends to be at the bottom. When the water pump is started, the low-temperature cooling medium transported into the cooling sleeve 300 will be deposited at the bottom, and the low-temperature cooling medium can enter the medium return channel 150 along the return hole 110, and then the cooling medium is sucked into the medium return chamber 130 along the medium return channel 150, and then the cooling medium is sprayed into the medium guide channel 160 through the pressurized spray direction of the impeller 131, and then 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 transferred to the top of the cooling chamber 310. On the one hand, the low-temperature cooling medium and the outer wall of the motor housing 100 are fully in contact to take away more heat, and on the other hand, the low-temperature cooling medium is transported to the top of the cooling chamber 310 and can be fully mixed with the cooling medium in the cooling sleeve 300.

[0049] See also Figure 1 , Figure 2 and Figure 3 As shown, in the optional solution of this embodiment, the cross section of the guide channel 210 gradually decreases from one end close to the guide hole 120 to the other end. Through such a setting, the flow channel area of ​​the guide channel 210 formed between the guide cover 200 and the motor housing 100 gradually decreases, so that the flow rate of the cooling medium increases, so that the cooling medium can take away the heat in the motor housing 100 more quickly. At the same time, the small outlet at the top of the guide channel 210 can form a jet-like jet, which can quickly mix with the external liquid to reduce the cooling temperature;

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

[0051] See also Figure 1 , Figure 2 and Figure 3 As shown, in an optional solution of this embodiment, the height of the top of the air guide cover 200 gradually decreases from one end to the other end, so as to guide the cooling medium in the air guide channel 210 to one side.

[0052] Specifically, by gradually lowering the height of the top of the air guide cover 200 from one end to the other end, a guide slope 220 is formed on the top of the air guide cover 200, which can guide the cooling medium to the reflow hole 110, so that the cooling medium discharged from each guide channel 210 can correspond to a reflow hole 110, so that the cooling medium discharged from this guide channel 210 mainly flows to the corresponding reflow hole 110, and through the arrangement of multiple groups of reflow holes 110 and guide holes 120, the distribution of the cooling medium in the cooling sleeve 300 tends to be balanced.

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

[0054] A plurality of heat dissipation ribs 320 are provided on the cooling sleeve 300. The heat dissipation ribs 320 are provided to increase the contact area between the cooling medium and the cooling sleeve 300 and the heat dissipation area between the cooling sleeve 300 and the outside, thereby increasing the heat transfer speed and accelerating the cooling of the cooling medium through natural heat dissipation on the surface of the cooling sleeve 300.

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

[0056] The cooling sleeve 300 is provided with an exhaust port 340 , and the highest height of the liquid injection port 330 is higher than the height of the exhaust port 340 ; and 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 sleeve 300 is arranged more than 10 mm above the winding core of the stator 10 .

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

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

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

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements 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: include: A motor housing (100), a flow guide cover (200) and a cooling sleeve (300); The cooling sleeve (300) is installed on the outer wall of the motor housing (100) so that a cooling chamber (310) is formed 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 guide holes (120) at intervals and in an alternating manner; the return holes (110) and the guide holes (120) are located at the bottom of the cooling chamber (310); the guide cover (200) is installed on the motor housing (100); a guide channel (210) is formed between the guide cover (200) and the motor housing (100); and the guide holes (120) are located in the guide channel (210); The bottom of the motor housing (100) is provided with a medium return chamber (130), the return hole (110) and the guide hole (120); both are connected to the medium return chamber (130), and an impeller (131) is arranged in the medium return chamber (130) so that the cooling medium can flow from the return hole (110) to the guide hole (120).

2. The water pump cooling structure according to claim 1, characterized in that: The motor housing (100) comprises an upper housing (101) and a lower housing (102), and the upper housing (101) and the lower housing (102) are connected to each other; The upper housing (101) has a motor cavity (103) for carrying a stator (10) and a rotor (20), and a drive shaft (30) is inserted into the rotor (20); The cooling sleeve (300) is connected to the upper shell (101), the medium return chamber (130) is opened in the lower shell (102), and the impeller (131) is sleeved on the driving shaft (30); The upper shell (101) and the lower shell (102) are both provided with the return hole (110) and the guide hole (120).

3. The water pump cooling structure according to claim 2, characterized in that: A motor sealing chamber (140) is provided in the lower shell (102), the motor sealing chamber (140) is located above the medium reflux chamber (130), and a sealing element is provided between the motor sealing chamber (140) and the drive shaft (30).

4. The water pump cooling structure according to claim 2, characterized in that: A medium reflux channel (150) and a medium guide channel (160) are provided in the lower shell (102); the reflux hole (110) is communicated with the medium reflux chamber (130) through the medium reflux channel (150); and the guide hole (120) is communicated with the guide hole (120) through the medium guide channel (160); The caliber of the medium flow guiding channel (160) is greater than the caliber of the flow guiding hole (120).

5. The water pump cooling structure according to claim 4, characterized in that: The cross section of the flow guiding channel (210) gradually decreases from one end close to the flow guiding hole (120) to the other end.

6. The water pump cooling structure according to claim 1, characterized in that: The height of the top of the air guide cover (200) gradually decreases from one end to the other end, so as to guide the cooling medium in the air guide channel (210) to one side.

7. The water pump cooling structure according to claim 1, characterized in that: The cooling sleeve (300) is provided with a plurality of heat dissipation ribs (320) for increasing the heat dissipation area.

8. The water pump cooling structure according to claim 1, characterized in that: The cooling spacer (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).

9. The water pump cooling structure according to claim 8, characterized in that: The cooling spacer (300) is provided with 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).

10. A sewage pump, characterized in that: It comprises the water pump cooling structure as claimed in any one of claims 1 to 9.

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