Silicone oil clutch and water pump

Abstract

The application provides a silicone oil clutch, which comprises a driving plate, a driven plate, a belt pulley and an electromagnetic coil, the belt pulley is fixedly connected with the driving plate, a working cavity is formed between the belt pulley and the driving plate for accommodating the driven plate, the driven plate divides the working cavity into an upper cavity and a lower cavity, silicone oil is injected into the upper cavity, a sleeve is arranged in a central shaft hole of the driven plate, a flange is arranged at a lower end of the sleeve, a plurality of axial pin shafts are installed on the flange, a spring is sleeved on each pin shaft, a through hole is arranged on the driven plate corresponding to the position of each pin shaft for the pin shaft to pass through, the electromagnetic coil is installed in the belt pulley, under the magnetic attraction of the electromagnetic coil, the driven plate can move downward along the sleeve and the pin shaft to overcome the elastic force of the spring, the amount of silicone oil in the upper cavity is controlled by changing the distance between the driven plate and the driving plate, and the rotation speed of the driven plate is adjusted. The application also provides a water pump using the silicone oil clutch.

Description

Technical Field

[0001] This invention belongs to the field of silicone oil clutch technology, specifically relating to a silicone oil clutch and a water pump using a silicone oil clutch. Background Technology

[0002] Traditional automotive powertrains primarily refer to gasoline and diesel engines. Under the overarching goal of "dual carbon" (carbon reduction and emission control), higher demands are placed on energy conservation and emission reduction. In recent years, the electrification trend in passenger cars has developed rapidly, but in the commercial vehicle sector, traditional powertrains still dominate, making mass production of electrified vehicles difficult in the short term. Therefore, commercial vehicles face a more urgent task of energy conservation and emission reduction, and achieving energy efficiency in engines has become a goal pursued by some OEMs and engine manufacturers.

[0003] Traditional engine cooling water pumps are often directly connected to the engine's turbine system. When the engine speed changes rapidly, the impeller speed of the cooling water pump will also change rapidly, resulting in rapid changes in the water pump flow rate. This can easily cause the engine to cool down and heat up in a fluctuating manner. If the engine is too cold, carbon deposits can easily accumulate, causing certain damage to the engine.

[0004] However, existing silicone oil clutch water pumps cannot achieve full flow control within a given range, and in practice, they often only provide either on or off flow. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a silicone oil clutch that is easy to adjust the speed and a water pump using such a silicone oil clutch.

[0006] To solve the above-mentioned technical problems, the technical solution of the present invention regarding the clutch is: a silicone oil clutch, comprising a driving plate, a driven plate, a pulley, pins, springs, and an electromagnetic coil. The pulley is fixedly connected to the driving plate by connecting bolts, forming a working chamber between the pulley and the driving plate. The driven plate is located within this working chamber and divides the working chamber into an upper chamber and a lower chamber. The upper chamber is filled with silicone oil. Both the lower surface of the driving plate and the upper surface of the driven plate are provided with labyrinth grooves for the silicone oil to flow. A sleeve is provided in the central shaft hole of the driven plate. The lower end of the sleeve is provided with a flange. Multiple axial pins are installed on the flange, and each pin is fitted with a spring. The driven plate is provided with through holes corresponding to the position of each pin for the pin to pass through. The upper part of the moving plate is provided with an upper cover plate to fix the upper part of multiple pins; the electromagnetic coil is installed in the pulley, and under the magnetic attraction of the electromagnetic coil, the driven plate can overcome the spring force and move downward along the sleeve and pins; the pulley drives the driving plate to rotate under the action of external power, and the driving plate drives the driven plate to rotate through the silicone oil in the upper cavity, and the driven plate then drives the sleeve to rotate through the pins, and the sleeve is used to install the rotating shaft; by controlling the change of the magnetic flux of the electromagnetic coil, the magnetic attraction force on the driven plate can be changed, so that the driven plate moves up and down by the pins under the interaction of the magnetic attraction force of the electromagnetic coil and the spring force. By changing the distance between the driven plate and the driving plate, the amount of silicone oil in the upper cavity can be controlled, thereby realizing the speed regulation of the driven plate.

[0007] The silicone oil clutch provided by the above technical solution has the advantages of compact structure and ingenious operation, and can adjust the speed as needed. Because the driven plate can move up and down by relying on the pin shaft under the interaction of the magnetic attraction force of the electromagnetic coil and the spring force, the amount of silicone oil in the upper cavity can be controlled by changing the distance between the driven plate and the driving plate, thereby realizing the adjustment of the speed of the driven plate.

[0008] In one embodiment, the driven plate includes a middle portion and a peripheral portion, the peripheral portion being a magnetically permeable material and the middle portion being a magnetically shielding material, the middle portion and the peripheral portion being connected together by multiple castings or welding.

[0009] In one embodiment, the upper part of the pulley is provided with an annular magnetic field area, which corresponds to the outer periphery of the driven plate. Except for the magnetic field area, the other parts of the pulley are made of magnetic shielding material.

[0010] Furthermore, the driven plate is provided with a vent hole that runs through the upper and lower end faces, which is used to adjust the pressure balance between the upper and lower cavities when the driven plate moves up and down.

[0011] Furthermore, the active plate is provided with an oil storage tank and a one-way valve mounting hole. A one-way valve is installed in the one-way valve mounting hole. The pulley is provided with an oil return hole for connecting the lower cavity and the one-way valve. When the pulley and the active plate rotate, the centrifugal force generated will force the silicone oil in the lower cavity to flow back to the oil storage tank of the active plate through the oil return hole and the one-way valve.

[0012] In one embodiment, the lower surface of the active plate is further provided with an oil return groove, which is used to allow the silicone oil in the oil storage tank to flow back to the labyrinth groove of the active plate and the driven plate.

[0013] In one embodiment, the lower surface of the active plate is provided with a plurality of upper pressure relief grooves intersecting with the labyrinth grooves, and the upper surface of the driven plate is provided with a plurality of lower pressure relief grooves intersecting with the labyrinth grooves, which are used to enable the silicone oil to flow rapidly when the driven plate moves up and down, thereby relieving the silicone oil flow pressure.

[0014] In one embodiment, a sealing ring is provided on the outer peripheral surface of the driven plate.

[0015] The technical solution of this invention regarding a water pump is: a silicone oil clutch water pump, which uses the silicone oil clutch provided by this invention. The water pump includes a pump body, an impeller, a shaft bearing, a water seal, and a pump cover. The shaft bearing is composed of a central shaft, an intermediate shaft, and an outer ring shaft. The upper end of the central shaft of the shaft bearing is fixedly installed inside the sleeve of the silicone oil clutch.

[0016] Furthermore, the water pump also includes a signal wheel and a speed sensor. The intermediate shaft of the shaft-connecting bearing is interference-fitted with the pulley, the outer ring shaft of the shaft-connecting bearing is interference-fitted with the pump cover, and the lower end of the central shaft of the shaft-connecting bearing passes through the shaft hole of the pump cover and extends into the pump body to be interference-fitted with the impeller. A water seal is installed between the central shaft and the shaft hole of the pump cover. The signal wheel is installed at the lower end of the central shaft of the shaft-connecting bearing, and the speed sensor is installed on the pump cover and corresponds to the position of the signal wheel. The speed sensor detects the impeller speed by monitoring the signal wheel, monitors the impeller speed in real time, and realizes closed-loop control. Attached Figure Description

[0017] Figure 1 This is a schematic cross-sectional view of the silicone oil clutch water pump in an embodiment of the present invention. Figure 1 ;

[0018] Figure 2 This is a schematic cross-sectional view of the silicone oil clutch in an embodiment of the present invention. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the lower surface structure of the active plate in an embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the upper surface structure of the driven plate in an embodiment of the present invention;

[0021] Figure 5 This is a schematic cross-sectional view of the driven plate in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of silicone oil flow during clutch operation in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the shaft-connected bearing structure in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of an explosion of a silicone oil clutch water pump in an embodiment of the present invention.

[0025] The attached figures are labeled as follows:

[0026] 1 - Connecting bolts; 2 - Sealing cap; 3 - Active plate

[0027] 4 - Top cover plate; 5 - One-way valve; 6 - Driven plate

[0028] 7 - Sealing ring; 8 - Pin; 9 - Sleeve

[0029] 10 - Spring 11 - Electromagnetic coil 12 - Pulley

[0030] 13 – Shaft bearing; 14 – Impeller; 15 – Pump cover

[0031] 16 - Signal wheel 17 - Speed ​​sensor 18 - Pump body

[0032] 19—Water seal 3a—Oil storage tank 3b—Oil return tank

[0033] 3c – Upper pressure relief groove; 6a – Lower pressure relief groove; 6b – Vent hole

[0034] 6c – outer perimeter; 6d – middle section; 12a – magnetic flux zone

[0035] 12b – Lower cavity; 12c – Oil return hole; 12d – Upper cavity

[0036] 13a - Central axis; 13b - Intermediate axis; 13c - Outer ring axis. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the invention clearer, the invention will be described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Example 1

[0038] like Figures 1 to 8As shown, a silicone oil clutch includes a driving plate 3, a driven plate 6, a pulley 12, pins 8, springs 10, and an electromagnetic coil 11. The pulley 12 is fixedly connected to the driving plate 3 by connecting bolts 1, forming a working chamber between the pulley 12 and the driving plate 3. The driven plate 6 is located in this working chamber and divides it into an upper cavity 12d and a lower cavity 13b. The upper cavity 12d is filled with silicone oil. Both the lower surface of the driving plate 3 and the upper surface of the driven plate 6 are provided with labyrinth grooves for the silicone oil to flow. A sleeve 9 is provided in the central shaft hole of the driven plate 6. The lower end of the sleeve 9 is provided with a flange. Multiple axial pins 8 are installed on the flange. Each pin 8 is fitted with a spring 10. The driven plate 6 is provided with through holes corresponding to the position of each pin 8 for the pin 8 to pass through. An upper cover plate 4 is provided on the upper part of the driven plate 6 for... The upper part of multiple pins 8 is fixed; the electromagnetic coil 11 is installed in the pulley 12. Under the magnetic attraction of the electromagnetic coil 11, the driven plate 6 can overcome the elastic force of the spring 10 and move downward along the sleeve 9 and the pin 8; the pulley 12 drives the driving plate 3 to rotate under the action of external power. The driving plate 3 drives the driven plate 6 to rotate through the silicone oil in the upper cavity 12d. The driven plate 6 then drives the sleeve 9 to rotate through the pin 8. The sleeve 9 is used to install the rotating shaft; by controlling the change of the magnetic flux of the electromagnetic coil 11, the magnetic attraction force on the driven plate 6 can be changed, so that the driven plate 6 moves up and down by the interaction of the magnetic attraction force of the electromagnetic coil 11 and the elastic force of the spring 10. By changing the distance between the driven plate 6 and the driving plate 3, the amount of silicone oil in the upper cavity 12d can be controlled, thereby realizing the speed regulation of the driven plate 6.

[0039] like Figure 5 , 6 As shown, the driven plate 6 includes a middle part 6d and a peripheral part 6c. The peripheral part 6c is made of a magnetic material, and the middle part 6d is made of a magnetic shielding material. The middle part 6d and the peripheral part 6c are connected together by multiple castings or welding. The pulley 12 has an annular magnetic area 12a on its upper part, which corresponds to the peripheral part 6c of the driven plate. Except for the magnetic area 13c, the other parts of the pulley 12 are made of magnetic shielding material.

[0040] like Figure 1 As shown, to prevent silicone oil in the upper cavity 12d from leaking into the lower cavity 13b, a sealing ring 7 is provided on the outer peripheral surface of the driven plate 6. Meanwhile, as... Figure 4 As shown, in order to adjust the pressure balance between the upper cavity 12d and the lower cavity 13b when the driven plate 6 moves up and down, it is necessary to set two vent holes 6b that penetrate the upper and lower end faces on the driven plate 6. However, this will bring a new problem, that is, a small amount of silicone oil will inevitably flow from the upper cavity 12d into the lower cavity 13b through the vent holes 6b.

[0041] To address the new problems introduced by vent 6b, this embodiment further employs the following technical solution: Figure 1 , 2 As shown in Figures 3 and 6, the active plate 3 is provided with an oil storage tank 3a and a one-way valve mounting hole. A one-way valve 5 is installed in the one-way valve mounting hole. The pulley 12 is provided with an oil return hole 12c to connect the lower cavity 13b and the one-way valve 5. When the pulley 12 and the active plate 3 rotate, the centrifugal force generated will force the silicone oil in the lower cavity 13b to flow back to the oil storage tank 3a of the active plate 3 through the oil return hole 12c and the one-way valve 5. The lower surface of the active plate 3 is also provided with an oil return groove 3b, which is used to allow the silicone oil in the oil storage tank 3a to flow back to the labyrinth groove of the active plate 3 and the driven plate 6. The upper part of the active plate is provided with an opening corresponding to the position of the oil storage tank 3a and is covered by a sealing cap 2.

[0042] like Figure 3 As shown, the lower surface of the active plate 3 is provided with multiple upper pressure relief grooves 3c that intersect with the labyrinth groove, and the upper surface of the driven plate 6 is provided with multiple lower pressure relief grooves 6a that intersect with the labyrinth groove, which are used to enable the silicone oil to flow quickly when the driven plate 6 moves up and down, thereby relieving the silicone oil flow pressure. Example 2

[0043] like Figures 1 to 8 As shown, a silicone oil clutch water pump uses the silicone oil clutch in Embodiment 1, the specific structure of which will not be described in detail. The water pump includes a pump body 18, an impeller 14, a shaft bearing 13, a water seal 19, a pump cover 15, a signal wheel 16, and a speed sensor 17. The shaft bearing 13 is composed of a central shaft 13a, an intermediate shaft 13b, and an outer ring shaft 13c. The upper end of the central shaft 13a is fixedly installed in the sleeve 9 of the silicone oil clutch. The intermediate shaft 13b is interference-fitted with the pulley 12, and the outer ring shaft 13c... The central shaft 13a is interference-fitted with the pump cover 15. The lower end of the central shaft 13a passes through the shaft hole of the pump cover 15 and extends into the pump body 18, where it is interference-fitted with the impeller 14. A water seal 19 is installed between the central shaft 13a and the shaft hole of the pump cover. The signal wheel 16 is installed at the lower end of the central shaft 13a of the shaft connecting bearing. The speed sensor 17 is installed on the pump cover 15 and corresponds to the position of the signal wheel 16. The speed sensor 15 detects the speed of the impeller 14 by monitoring the signal wheel 16, and monitors the speed of the impeller 14 in real time to achieve closed-loop control.

[0044] The above embodiments are preferred implementations of the present invention. In addition, the present invention can be implemented in other ways. Any obvious substitutions without departing from the concept of the present technical solution are within the protection scope of the present invention.

[0045] To facilitate understanding by those skilled in the art of the improvements of this invention over the prior art, some of the accompanying drawings and descriptions have been simplified, and for clarity, some other elements have been omitted from this application. Those skilled in the art should realize that these omitted elements may also constitute the content of this invention.

Claims

1. A silicone oil clutch, characterized in that: The system includes an active plate (3), a driven plate (6), a pulley (12), and an electromagnetic coil (11). The pulley (12) is fixedly connected to the active plate (3) by a connecting bolt (1), forming a working cavity between the pulley (12) and the active plate (3). The driven plate (6) is located in the working cavity and divides the working cavity into an upper cavity (12d) and a lower cavity (12b). The upper cavity (12d) is filled with silicone oil. The lower surface of the active plate (3) and the driven plate (6) are connected to the electromagnetic coil (11). The upper surface of the driven plate (6) is provided with labyrinth grooves for the flow of silicone oil; a sleeve (9) is provided in the central shaft hole of the driven plate (6), and a flange is provided at the lower end of the sleeve (9). Multiple axial pins (8) are installed on the flange, and a spring (10) is sleeved on each pin (8). The driven plate (6) is provided with through holes corresponding to the position of each pin (8) for the pin (8) to pass through. An upper cover plate (4) is provided on the upper part of the driven plate (6) for covering the upper part of the multiple pins (8). The part is fixed; the electromagnetic coil (11) is installed in the pulley (12). Under the magnetic attraction of the electromagnetic coil (11), the driven plate (6) can overcome the elastic force of the spring (10) and move downward along the sleeve (9) and the pin (8); the pulley (12) drives the driving plate (3) to rotate under the action of external power. The driving plate (3) drives the driven plate (6) to rotate through the silicone oil in the upper cavity (12d). The driven plate (6) then drives the sleeve (9) through the pin (8). 9) Rotation, the sleeve (9) is used to install the rotating shaft; by controlling the change of the magnetic flux of the electromagnetic coil (11), the magnetic attraction force on the driven plate (6) can be changed, so that the driven plate (6) moves up and down on the pin (8) under the interaction of the magnetic attraction force of the electromagnetic coil (11) and the elastic force of the spring (10). By changing the distance between the driven plate (6) and the driving plate (3), the amount of silicone oil in the upper cavity (12d) can be controlled, thereby realizing the speed adjustment of the driven plate (6).

2. The silicone oil clutch according to claim 1, characterized in that: The driven plate (6) includes a middle part (6d) and a peripheral part (6c). The peripheral part (6c) is made of a magnetic material, and the middle part (6d) is made of a magnetic shielding material. The middle part (6d) and the peripheral part (6c) are connected together by multiple castings or welding.

3. The silicone oil clutch according to claim 1 or 2, characterized in that: The pulley (12) has an annular magnetic field area (12a) on its upper part, which corresponds to the outer part (6c) of the driven plate. Except for the magnetic field area (12a), the other parts of the pulley (12) are made of magnetic shielding material.

4. The silicone oil clutch according to claim 1 or 2, characterized in that: The driven plate (6) is provided with a vent (6b) that runs through the upper and lower end faces, which is used to adjust the pressure balance between the upper cavity (12d) and the lower cavity (12b) when the driven plate (6) moves up and down.

5. The silicone oil clutch according to claim 4, characterized in that: The active plate (3) is provided with an oil storage tank (3a) and a one-way valve mounting hole. A one-way valve (5) is installed in the one-way valve mounting hole. The pulley (12) is provided with an oil return hole (12c) for connecting the lower cavity (12b) and the one-way valve (5). When the pulley (12) and the active plate (3) rotate, the centrifugal force generated will force the silicone oil in the lower cavity (12b) to flow back to the oil storage tank (3a) of the active plate through the oil return hole (12c) and the one-way valve (5).

6. The silicone oil clutch according to claim 1 or 2, characterized in that: The lower surface of the active plate (3) is also provided with an oil return groove (3b), which is used to allow the silicone oil in the oil storage tank (3a) to flow back to the labyrinth groove of the active plate (3) and the driven plate (6).

7. The silicone oil clutch according to claim 1 or 2, characterized in that: The lower surface of the active plate (3) is provided with multiple upper pressure relief grooves (3c) that intersect with the labyrinth groove, and the upper surface of the driven plate (6) is provided with multiple lower pressure relief grooves (6a) that intersect with the labyrinth groove.

8. The silicone oil clutch according to claim 1 or 2, characterized in that: The outer peripheral surface of the driven plate (6) is provided with a sealing ring (7).

9. A silicone oil clutch water pump, the water pump comprising a pump body (18), an impeller (14), a shaft bearing (13), a water seal (19), and a pump cover (15), characterized in that: The silicone oil clutch is the silicone oil clutch according to any one of claims 1 to 8. The shaft connecting bearing (13) is composed of a central shaft (13a), an intermediate shaft (13b) and an outer ring shaft (13c). The upper end of the central shaft (13a) of the shaft connecting bearing is fixedly installed in the sleeve (9) of the silicone oil clutch.

10. The silicone oil clutch water pump according to claim 9, characterized in that: The water pump also includes a signal wheel (16) and a speed sensor (17). The intermediate shaft (13b) of the shaft-connecting bearing is interference-fitted with the pulley (12), the outer ring shaft (13c) of the shaft-connecting bearing is interference-fitted with the pump cover (15), and the lower end of the central shaft (13a) of the shaft-connecting bearing passes through the shaft hole of the pump cover (15) and extends into the pump body (18) to be interference-fitted with the impeller (14). A water seal (19) is installed between the central shaft (13a) and the shaft hole of the pump cover. The signal wheel (16) is installed at the lower end of the central shaft (13a) of the shaft-connecting bearing. The speed sensor (17) is installed on the pump cover (15) and corresponds to the position of the signal wheel (16). The speed sensor (17) detects the speed of the impeller (14) by monitoring the signal wheel (16), monitors the speed of the impeller (14) in real time, and realizes closed-loop control.

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