Automobile water pump with cooling structure

Abstract

The present invention relates to an automobile water pump with a cooling structure in the field of automobile water pumps. The automobile water pump is provided with a heat exchange cavity wrapped around the outside of a stator and a rotor and a rotating shaft connecting the heat exchange cavity and the inner cavity of a pump body. When dissipating heat, the negative pressure generated in the pump body is utilized to introduce the transported coolant into the heat exchange cavity through a connecting pipe, and then the coolant flows back to the pump body through the rotating shaft, so that the coolant circulates on the outside of the stator and the rotor and inside the rotating shaft, thereby realizing circulating heat exchange and heat dissipation on the inside and outside of the water pump and meeting the heat dissipation demand under high fever state. At the same time, a blocking column driven by a temperature sensor and an electric telescopic rod automatically adjusts the flow area of ​​a liquid discharge port of the rotating shaft when the temperature changes, and adopts a method of changing the flow rate to adapt to the heat dissipation demand under different temperature conditions, and has good adaptability.

Description

Technical Field

[0001] The invention relates to a water pump, in particular to an automobile water pump with a cooling structure which is applied to the field of automobile water pumps. Background Art

[0002] The water pump is an important component of the automobile engine cooling system. Its main function is to drive the coolant circulation, absorb excess heat from the engine and transfer it to the outside air through the heat dissipation device to prevent the engine temperature from being too high. Water pumps are divided into traditional mechanical water pumps and electronic water pumps. Traditional engines generally use mechanical water pumps, which drive the water pump bearing and impeller to rotate through a pulley. The coolant in the water pump is driven by the impeller to rotate together, and is pushed to the edge of the water pump housing under the action of centrifugal force, while generating a certain pressure, and then flows out from the outlet or water pipe; the automobile electronic water pump adjusts the duty cycle through PWM (pulse width modulation) according to feedback signals such as water temperature, and transmits the signal to the controller inside the electronic water pump. The controller controls the rotation of the motor according to the duty cycle, thereby driving the impeller rotor to rotate, thereby realizing the coolant circulation.

[0003] Existing electronic water pumps also generate a lot of heat when working. The heat accumulated in the water pump not only affects the working state of the water pump but also affects the service life of the water pump. The cooling capacity of the built-in cooling fan of the traditional electronic water pump is limited and cannot meet the cooling needs of the water pump under high heat generation conditions. Summary of the invention

[0004] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is that the traditional automotive electronic water pump with a cooling fan cannot meet the heat dissipation demand under high heat generation conditions.

[0005] In order to solve the above problems, the present invention provides an automobile water pump with a cooling structure, comprising a shell, in which a stator, a rotor and a rotating shaft are installed in sequence from the outside to the inside of the shell, an inner end plate integrally formed with the shell is abutted on the left side of the stator and the rotor, a heat exchange cavity is opened in the side wall of the right half of the shell, and the heat exchange cavity extends into the inner end plate; a pump body is fixedly connected to the side of the shell away from the inner end plate, a paddle wheel is nested in the pump body, the paddle wheel is fixedly connected to the rotating shaft extending into the pump body, a liquid inlet pipe is connected to the lower part of the pump body, a liquid outlet pipe is connected to the upper part of the pump body, and the liquid outlet pipe is connected to the heat exchange cavity through a connecting pipe The left end of the inner end plate is sleeved on the outside of the rotating shaft and is rotatably connected with it. The rotating shaft is a hollow shaft. The side wall of the right end of the rotating shaft is provided with a second liquid discharge port connected with the inner cavity of the pump body; a blocking column cooperating with the second liquid discharge port is nested at the right end of the rotating shaft, and the blocking column is connected to an electric telescopic rod installed on the outside of the pump body. The electric telescopic rod drives the blocking column to move in the rotating shaft, and the blocking column adjusts the flow area of ​​the second liquid discharge port; the left end of the inner end plate is fixedly connected to a temperature sensor extending into the heat exchange cavity, and both the temperature sensor and the electric telescopic rod are electrically connected to a controller installed on the outside of the shell.

[0006] In the above-mentioned automobile water pump with a cooling structure, the coolant is introduced through a heat exchange chamber extending from the shell to the inner end plate and a rotating shaft connecting the heat exchange chamber and the pump body to perform comprehensive internal and external circulation cooling on the water pump to meet the heat dissipation requirements under high heat generation.

[0007] As a further improvement of the present application, a retention cylinder fixedly connected to the inner wall of the pump body is nested in the pump body, a third liquid inlet is provided on the side of the retention cylinder facing the liquid inlet pipe, a third liquid discharge hole is provided on the side of the retention cylinder facing the liquid outlet pipe, a tangential hood is connected to the retention cylinder at a position opposite to the liquid inlet pipe, a collecting box is detachably connected to the lower end of the tangential hood, a slag discharge port is provided at the connection between the retention cylinder and the tangential hood, a guide strip extending into the tangential hood is provided on the outer wall of the retention cylinder on the right side of the slag discharge port, and a reflux hole connected to the tangential hood and evenly distributed is provided on the right side of the guide strip.

[0008] As a further improvement of the present application, a dust cover is threadedly connected to the left end of the shell, and the part of the shaft located on the left side of the inner end plate is rotatably sleeved with a fan impeller, and the fan impeller is connected to the shaft for transmission through an electromagnetic clutch.

[0009] As a further improvement of the present application, a circumferentially distributed heat dissipating fins are fixedly connected to the left end face of the inner end plate, a separating ring abutting against the middle of the heat dissipating fins is provided on the inner side of the dust cover, and a fan impeller is installed on the inner side of the separating ring.

[0010] As a further improvement of the present application, a hollow cavity is provided in the rotating shaft along its axial direction, a second liquid inlet connected to the hollow cavity is provided at the left end of the rotating shaft, the second liquid discharge port is a fan-shaped port, and a second liquid discharge port distributed in a circular pattern is provided on the side wall at the right end of the rotating shaft, and the blocking column is a horizontally arranged cylinder.

[0011] As a further improvement of the present application, a cylindrical portion is provided at the left end of the inner end plate, and a first liquid discharge port is opened on the inner wall of the cylindrical portion in a circumferentially distributed manner. A group of raised rings rotatably nested in the cylindrical portion are provided on both sides of the rotating shaft located at the second liquid inlet. The coolant enters the cylindrical portion through the first liquid discharge port and then enters the hollow cavity of the rotating shaft through the second liquid inlet.

[0012] As a further improvement of the present application, the retention tube is a cylindrical structure arranged in the same direction as the pump body, the blades of the impeller are in sliding contact with the inner wall of the retention tube, and the tangential cover is tangentially connected to the retention tube.

[0013] As a further improvement of the present application, a filter screen cover is provided at the connection point between the connecting pipe and the liquid outlet pipe, and a scraping wheel is abutted against the outer side of the filter screen cover, and the scraping wheel includes a plurality of arc-shaped scrapers.

[0014] Beneficial effects:

[0015] (1) The present invention is provided with a heat exchange chamber wrapped around the outside of the stator and the rotor and a rotating shaft connecting the heat exchange chamber and the inner cavity of the pump body. When dissipating heat, the negative pressure generated in the pump body is used to introduce the transported coolant into the heat exchange chamber through a connecting pipe, and then the coolant flows back to the pump body through the rotating shaft, so that the coolant circulates on the outside of the stator and the rotor and inside the rotating shaft, realizing circulating heat exchange and heat dissipation on the inside and outside of the water pump, meeting the heat dissipation requirements under high fever conditions; at the same time, the blocking column driven by the temperature sensor and the electric telescopic rod automatically adjusts the flow area of ​​the shaft discharge port when the temperature changes, adapting to the heat dissipation requirements of different temperatures, and has good adaptability.

[0016] (2) The present invention covers the electronics and the rotor by an inner end plate integrally formed with the shell, and utilizes the coolant extending from the shell to the heat exchange cavity to achieve flow coverage of the stator and the rotor, thereby improving the heat dissipation efficiency; at the same time, by utilizing the heat dissipation fins installed on the side wall of the inner end plate and the fan impeller connected to the rotating shaft through an electromagnetic clutch, when the temperature exceeds the threshold, air cooling and liquid cooling are coordinated to further improve the heat dissipation efficiency, so that the water pump can quickly restore the operating temperature.

[0017] (3) The present invention uses a retaining cylinder nested in the pump body and a tangent cover and a collecting box connected to the retaining cylinder to efficiently retain, separate and collect impurities in the coolant while pumping the coolant, so that the coolant maintains a good heat exchange state and reduces the adhesion and corrosion of impurities in the coolant to the engine and the water pump heat exchange cavity and the inner cavity of the rotating shaft.

[0018] (4) The present invention has a retention cylinder with a slag discharge port, a guide strip and a reflux hole, and uses the cooling liquid subjected to centrifugal force to carry the impurities into the tangential cover and the collection box, thereby achieving a better impurity separation and collection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the present application from the front side perspective;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the present application from a rear side perspective;

[0021] Figure 3 This is a schematic diagram of the transverse cross-sectional structure of the present application;

[0022] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 for Figure 3 A schematic diagram of the enlarged structure at B in the middle;

[0024] Figure 6 It is a schematic diagram of the cross-sectional structure of the shell in this application;

[0025] Figure 7 It is a schematic diagram of the three-dimensional structure of the rotating shaft in this application;

[0026] Figure 8 A schematic diagram of the flow of the coolant in this application;

[0027] Fig. 9 is a schematic diagram of the flow of airflow in this application;

[0028] Fig.10 This is a schematic diagram of the longitudinal cross-section mechanism of the present application;

[0029] Fig.11 It is a schematic diagram of the assembly of the interception tube and the impeller in this application;

[0030] Fig.12 It is a schematic diagram of the longitudinal cross-sectional structure of the interception tube in this application;

[0031] Fig.13 This is a schematic diagram of the coolant impurity cleaning state in this application.

[0032] Description of the numbers in the figure:

[0033] 1. Shell; 101. Heat exchange chamber; 102. First liquid discharge port; 2. Pump body; 3. Liquid inlet pipe; 4. Liquid outlet pipe; 5. Paddle wheel; 6. Rotating shaft; 601. Hollow cavity; 602. Second liquid inlet; 603. Second liquid discharge port; 7. Rotor; 8. Stator; 9. Inner end plate; 10. Connecting pipe; 1001. Filter screen cover; 1002. Scraper wheel; 11. Temperature sensor; 12. Blocking column; 13. Electric telescopic rod; 14. Controller; 15. Retention cylinder; 1501. Third liquid inlet; 1502. Third liquid discharge hole; 1503. Slag discharge port; 1504. Guide strip; 1505. Reflux hole; 16. Tangential cover; 17. Collecting box; 18. Heat dissipation fins; 19. Electromagnetic clutch; 20. Fan impeller; 21. Dust cover; 2101. Separation ring. DETAILED DESCRIPTION

[0034] The following describes two implementation modes of the present application in detail with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] Figure 1-9A car water pump with a cooling structure is shown, comprising a housing 1, in which a stator 8, a rotor 7 and a rotating shaft 6 are installed in sequence from the outside to the inside of the housing 1, an inner end plate 9 integrally formed with the housing 1 is abutted on the left side of the stator 8 and the rotor 7, a heat exchange cavity 101 is opened in the side wall of the right half of the housing 1, and the heat exchange cavity 101 extends into the inner end plate 9; a pump body 2 is fixedly connected to the side of the housing 1 away from the inner end plate 9, a paddle wheel 5 is nested in the pump body 2, and the paddle wheel 5 is fixedly connected to the rotating shaft 6 extending into the pump body 2, a liquid inlet pipe 3 is connected to the lower part of the pump body 2, a liquid outlet pipe 4 is connected to the upper part of the pump body 2, the liquid outlet pipe 4 is connected to the heat exchange cavity 101 through a connecting pipe 10, and the left end of the inner end plate 9 is sleeved It is arranged on the outside of the rotating shaft 6 and is connected with the rotating shaft 6 for rotation. The rotating shaft 6 is a hollow shaft. The side wall at the right end of the rotating shaft 6 is provided with a second liquid discharge port 603 connected with the inner cavity of the pump body 2. A blocking column 12 cooperating with the second liquid discharge port 603 is nested at the right end of the rotating shaft 6. The blocking column 12 is connected to an electric telescopic rod 13 installed on the outside of the pump body 2. The electric telescopic rod 13 drives the blocking column 12 to move in the rotating shaft 6, and the blocking column 12 adjusts the flow area of ​​the second liquid discharge port 603; the left end of the inner end plate 9 is fixedly connected to a temperature sensor 11 extending into the heat exchange cavity 101, and both the temperature sensor 11 and the electric telescopic rod 13 are electrically connected to a controller 14 installed on the outside of the shell 1.

[0037] For details, please refer to Figure 8 When the automobile water pump is working, the rotating shaft 6 drives the impeller 5 to rotate, and the impeller 5 draws the coolant of the automobile engine from the external heat exchanger through the liquid inlet pipe 3 to the pump body 2, and then injects it into the automobile engine through the liquid outlet pipe 4, so as to realize the circulation of the coolant; at the same time, due to the rotation of the impeller 5, the central position of the pump body 2 is in a negative pressure state, and the pressure at the connection point between the connecting pipe 10 and the liquid outlet pipe 4 is greater than the pressure at the second liquid discharge port 603 at the right end of the rotating shaft 6. The coolant is injected into the heat exchange cavity 101 through the connecting pipe 10, and the coolant flows into the inner end plate 9 through the heat exchange cavity 101. The coolant flowing through the heat exchange cavity 101 wrapped around the outside of the stator 8 and the rotor 7 is heat exchanged and cooled on the stator 8 and the rotor 7; then the coolant flows into the left end of the rotating shaft 6, and then flows through the rotating shaft 6 to heat exchange and cool the rotating shaft 6, and finally flows back to the pump body 2 again through the second liquid discharge port 603 at the right end of the rotating shaft 6, so as to realize the circulation of the coolant.

[0038] Compared with the traditional automobile electronic water pump, the present invention provides a heat exchange cavity 101 wrapped around the outside of the stator 8 and the rotor 7 and a hollow rotating shaft 6. When working, the pressure difference between the pump body 2 and the liquid storage pipe 4 is used to allow the coolant to enter the heat exchange cavity 101 through the connecting pipe 10 connected to the liquid outlet pipe 4, and then flow back to the pump body 2 through the hollow cavity of the rotating shaft 6, so as to realize the circulation cooling of the stator 8, the rotor 7 and the rotating shaft 6 of the water pump itself by transporting the coolant, and as the speed of the rotating shaft 6 is higher, that is, the working power of the water pump is higher, the outlet pipe 4 and the liquid storage pipe 4 are connected to the liquid outlet pipe 4. The greater the internal pressure difference between the pump body 2, the greater the flow rate of the coolant in the heat exchange chamber 101 and the hollow cavity of the rotating shaft 6, thereby achieving a match between the flow rate of the heat exchange fluid and the working speed, and having a better cooling effect; in addition, by providing a temperature sensor 11 and a blocking column 12, the temperature of the coolant in the heat exchange chamber 101 is monitored. Under different heating temperature conditions, the controller 14 controls the electric telescopic rod 13 to drive the blocking column 12 to move, adjusts the flow area of ​​the second liquid discharge port 603, adapts to the heat dissipation requirements under different heating conditions, and realizes adaptive adjustment.

[0039] See also Figure 3-5 A hollow cavity 601 is provided in the rotating shaft 6 along its axial direction, a second liquid inlet 602 connected to the hollow cavity 601 is provided at the left end of the rotating shaft 6, the second liquid discharge port 603 is a fan-shaped port, and a second liquid discharge port 603 distributed in a circle is provided on the side wall of the right end of the rotating shaft 6, and the blocking column 12 is a horizontally arranged cylinder.

[0040] Specifically, the second liquid discharge ports 603 distributed in a circumference are blocked by moving the blocking column 12 to adjust the flow area thereof.

[0041] See also Figure 4 A cylindrical portion is provided at the left end of the inner end plate 9, and a first liquid discharge port 102 distributed in a circumferential manner is opened on the inner wall of the cylindrical portion. A group of raised rings rotatably nested in the cylindrical portion are provided on both sides of the second liquid inlet 602 of the rotating shaft 6. The coolant enters the cylindrical portion through the first liquid discharge port 102 and then enters the hollow cavity 601 of the rotating shaft 6 through the second liquid inlet 602.

[0042] Specifically, the rotational connection between the rotating shaft 6 and the inner end plate 9 is achieved.

[0043] See also Figure 3 and Figure 4 A dust cover 21 is threadedly connected to the left end of the shell 1, and a fan impeller 20 is rotatably sleeved on the part of the rotating shaft 6 located on the left side of the inner end plate 9. The fan impeller 20 is connected to the rotating shaft 6 through an electromagnetic clutch 19, and the electromagnetic clutch 19 is fixedly connected to the inner end plate 9 through a support rod.

[0044] Specifically, the temperature of the coolant in the heat exchange chamber 101 is monitored by the temperature sensor 11. When the monitored temperature exceeds the threshold, the controller 14 starts the electromagnetic clutch 19, and the shaft 6 drives the fan impeller 20 to rotate through the electromagnetic clutch 19, thereby realizing air flow between the inner cavity of the shell 1 and the external atmosphere, thereby increasing the heat dissipation effect.

[0045] It should be noted that the input end of the electromagnetic clutch 19 is connected to the rotating shaft 6, and the output end is connected to the fan impeller 20. The input end of the electromagnetic clutch 19 includes an active power cylinder that is slidably engaged with the rotating shaft 6, an active friction plate is provided on the outer side of the power cylinder, and a magnetic induction coil is provided on the inner side of the active power cylinder. The output end of the electromagnetic clutch 19 includes a driven power cylinder, the outer end of the driven power cylinder is fixedly connected to the fan impeller 20, and the inner end of the driven power cylinder is fixedly connected to a driven friction plate.

[0046] See also Figure 4 The left end surface of the inner end plate 9 is fixedly connected with circumferentially distributed heat dissipation fins 18 , the inner side of the dust cover 21 is provided with a separation ring 2101 abutting against the middle of the heat dissipation fins 18 , and the fan impeller 20 is installed on the inner side of the separation ring 2101 .

[0047] For details, please refer to Fig. 9 By providing a separation ring 2101 and a heat dissipation fin 18, the airflow enters from the outside of the separation ring 2101 and flows into the heat dissipation fin 18 and then is discharged from the inside of the separation ring 2101, thereby realizing a one-way flow of the airflow, and the heat inside the heat exchange cavity 101 is dissipated secondary through the heat dissipation fin 18.

[0048] Second implementation method:

[0049] Figure 10-13 The present invention shows an automobile water pump with a cooling structure. On the basis of the first embodiment, a retaining cylinder 15 fixedly connected to the inner wall of the pump body 2 is nested in the pump body 2, a third liquid inlet 1501 is provided on the side of the retaining cylinder 15 facing the liquid inlet pipe 3, and a third liquid discharge hole 1502 evenly distributed is provided on the side of the retaining cylinder 15 facing the liquid outlet pipe 4. A tangential cover 16 is connected to the retaining cylinder 15 at a position opposite to the liquid inlet pipe 3, and a collecting box 17 is detachably connected to the lower end of the tangential cover 16. A slag discharge port 1503 is provided at the connection between the retaining cylinder 15 and the tangential cover 16. A guide strip 1504 extending into the tangential cover 16 is provided on the outer wall of the retaining cylinder 15 located on the right side of the slag discharge port 1503, and the retaining cylinder 15 is provided with reflux holes 1505 connected to the tangential cover 16 and evenly distributed on the right side of the guide strip 1504.

[0050] Specifically, the coolant containing impurities enters the interception cylinder 15 through the liquid inlet pipe 3 and the third liquid inlet port 1501. Under the centrifugal force of the impeller 5, part of the coolant enters the liquid outlet pipe 4 through the third liquid discharge hole 1502 and is discharged. The filtered coolant enters the heat exchange chamber 101 through the connecting pipe 10 for circulation; part of the coolant drives the impurities intercepted by the third liquid discharge hole 1502 to continue to rotate. When the coolant containing impurities is discharged into the tangential cover 16 through the slag discharge port 1503 under the action of centrifugal force, it is then discharged along the heat exchange chamber 101. The coolant flows in an arc shape along the guide strip 1504, and then the coolant passes through the reflux interception cylinder 15 of the reflux hole 1505. At the same time, the impurities are retained in the tangential cover 16 by the reflux hole 1505. Under the mutual squeezing effect of gravity and impurity accumulation, the impurities are precipitated into the collection box 17, thereby achieving efficient filtration of the coolant and separation and collection of impurities, so that the coolant has a better heat conduction and heat exchange effect. At the same time, it prevents impurities from contaminating the automobile engine and the wall of the heat exchange cavity 101 and the inner cavity of the shaft 6, reducing the influence of coolant impurities on the heat exchange efficiency.

[0051] See also Fig.11 and Fig.12 The retaining tube 15 is a cylindrical structure arranged in the same direction as the pump body 2 . The blades of the impeller 5 are in sliding contact with the inner wall of the retaining tube 15 . The tangential cover 16 is tangentially connected to the retaining tube 15 .

[0052] Specifically, the retention and collection effects of impurities are improved.

[0053] See also Fig.10 A filter screen cover 1001 is provided at the connection point between the connecting pipe 10 and the liquid outlet pipe 4. A scraping wheel 1002 is abutted against the outer side of the filter screen cover 1001. The scraping wheel 1002 includes a plurality of arc-shaped scrapers.

[0054] Specifically, the coolant is filtered twice through the filter cover 1001 to further reduce impurities entering the heat exchange chamber 101 and the inner cavity of the rotating shaft 6, reduce adhesion and corrosion to the inner walls of the two, and improve the heat exchange efficiency; driven by the coolant in the liquid outlet pipe 4, the scraper wheel 1002 rotates on the surface of the filter cover 1001 to clean the filter cover 1001 and improve the passing efficiency of the coolant.

[0055] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An automobile water pump with a cooling structure, characterized in that: The invention comprises a shell (1), wherein a stator (8), a rotor (7) and a rotating shaft (6) are installed in the shell (1) in sequence from the outside to the inside, an inner end plate (9) formed integrally with the shell (1) is abutted on the left side of the stator (8) and the rotor (7), a heat exchange cavity (101) is opened in the side wall of the right half of the shell (1), and the heat exchange cavity (101) extends into the inner end plate (9); a pump body (2) is fixedly connected to the side of the shell (1) away from the inner end plate (9), and an impeller (101) is embedded in the pump body (2) 5), the impeller (5) is fixedly connected to a rotating shaft (6) extending into the pump body (2), the lower part of the pump body (2) is connected to a liquid inlet pipe (3), the upper part of the pump body (2) is connected to a liquid outlet pipe (4), the liquid outlet pipe (4) is connected to the heat exchange chamber (101) through a connecting pipe (10), the left end of the inner end plate (9) is sleeved on the outside of the rotating shaft (6) and is rotatably connected thereto, the rotating shaft (6) is a hollow shaft, and the side wall of the right end of the rotating shaft (6) is provided with a second liquid discharge port (603) connected to the inner cavity of the pump body (2); A blocking column (12) cooperating with the second liquid discharge port (603) is nested at the right end of the rotating shaft (6); the blocking column (12) is connected to an electric telescopic rod (13) mounted on the outside of the pump body (2); the electric telescopic rod (13) drives the blocking column (12) to move within the rotating shaft (6); the blocking column (12) adjusts the flow area of ​​the second liquid discharge port (603); a temperature sensor (11) extending into the heat exchange chamber (101) is fixedly connected to the left end of the inner end plate (9); both the temperature sensor (11) and the electric telescopic rod (13) are electrically connected to a controller (14) mounted on the outside of the housing (1); The rotating shaft (6) is provided with a hollow cavity (601) arranged along its axial direction, the left end of the rotating shaft (6) is provided with a second liquid inlet (602) communicating with the hollow cavity (601), the second liquid discharge port (603) is a fan-shaped port, the side wall of the right end of the rotating shaft (6) is provided with second liquid discharge ports (603) distributed in a circumferential manner, and the blocking column (12) is a horizontally arranged cylinder; The inner end plate (9) is provided with a cylindrical portion at the left end, and the inner wall of the cylindrical portion is provided with first liquid discharge ports (102) distributed in a circumferential manner. The rotating shaft (6) is provided with a group of raised rings rotatably nested in the cylindrical portion on both sides of the second liquid inlet port (602). The coolant enters the cylindrical portion through the first liquid discharge port (102) and then enters the hollow cavity (601) of the rotating shaft (6) through the second liquid inlet port (602).

2. The automotive water pump with a cooling structure according to claim 1, characterized in that: The pump body (2) is embedded with a retaining cylinder (15) fixedly connected to the inner wall of the pump body (2); a third liquid inlet (1501) is provided on the side of the retaining cylinder (15) facing the liquid inlet pipe (3); a third liquid discharge hole (1502) is evenly distributed on the side of the retaining cylinder (15) facing the liquid outlet pipe (4); a tangential cover (16) is connected to the retaining cylinder (15) at a position opposite to the liquid inlet pipe (3); a collecting box (17) is detachably connected to the lower end of the tangential cover (16); a slag discharge port (1503) is provided at the connection between the retaining cylinder (15) and the tangential cover (16); a guide strip (1504) extending into the tangential cover (16) is provided on the outer wall of the retaining cylinder (15) located on the right side of the slag discharge port (1503); and a reflux hole (1505) connected to the tangential cover (16) and evenly distributed is provided on the retaining cylinder (15) at a position on the right side of the guide strip (1504).

3. The automotive water pump with a cooling structure according to claim 1, characterized in that: The left end of the housing (1) is threadedly connected to a dust cover (21); the portion of the rotating shaft (6) located on the left side of the inner end plate (9) is rotatably sleeved with a fan impeller (20); the fan impeller (20) is connected to the rotating shaft (6) for transmission via an electromagnetic clutch (19).

4. The automotive water pump with a cooling structure according to claim 3, characterized in that: The left end surface of the inner end plate (9) is fixedly connected to heat dissipation fins (18) distributed in a circular pattern, the inner side of the dust cover (21) is provided with a separation ring (2101) abutting against the middle of the heat dissipation fins (18), and the fan impeller (20) is mounted on the inner side of the separation ring (2101).

5. The automobile water pump with a cooling structure according to claim 2, characterized in that: The interception cylinder (15) is a cylindrical structure arranged in the same direction as the pump body (2); the blades of the impeller (5) are in sliding contact with the inner wall of the interception cylinder (15); and the tangential cover (16) is in tangential communication with the interception cylinder (15).

6. The automobile water pump with a cooling structure according to claim 2, characterized in that: A filter screen cover (1001) is provided at the connection point between the connecting pipe (10) and the liquid outlet pipe (4), and a scraping wheel (1002) is abutted against the outside of the filter screen cover (1001), wherein the scraping wheel (1002) comprises a plurality of arc-shaped scrapers.

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