Silicone oil clutch fan

Abstract

The invention provides a silicone oil clutch fan which is characterized in that a cooling flow channel and a mounting groove are formed in a transmission shaft, the mounting groove communicates with the cooling flow channel, and a driving plate is connected to the transmission shaft; the cover body assembly comprises a front cover and a partition plate, an oil storage cavity is formed between the front cover and the partition plate, an oil inlet hole is formed in the partition plate, the front cover is matched with the driving plate in an inserted mode, and a first working cavity is formed between the partition plate and the driving plate and communicated with the oil storage cavity through the oil inlet hole. The valve plate is movably connected with the partition plate and has a first state for blocking the oil inlet hole and a second state for avoiding the oil inlet hole; the temperature sensing assembly comprises a temperature sensing piece, the temperature sensing piece is arranged in the mounting groove, and the temperature sensing piece is deformed by making contact with cooling liquid in the cooling flow channel so as to drive the valve plate to be switched between the first state and the second state. According to the structure of the silicone oil clutch fan in the scheme, the technical problem that a common silicone oil clutch fan in the prior art is low in control precision is solved.

Description

Technical Field

[0001] This invention relates to the technical field of silicone oil clutch fans, and more specifically, to a silicone oil clutch fan. Background Technology

[0002] Vehicle engines generate a significant amount of heat during operation. To ensure efficient and stable operation within a suitable temperature range, the cooling system plays a crucial role. The cooling system not only includes coolant circulation but also involves precise control of fan speed to ensure effective heat dissipation from the radiator. Traditional fan control methods primarily include direct-drive fans, silicone oil clutch fans, and electric fans. Silicone oil clutch fans are further divided into standard silicone oil clutch fans and electronically controlled silicone oil clutch fans. Considering both fuel efficiency and cost, standard silicone oil clutch fans are the most popular, holding over 80% of the market share.

[0003] Conventional silicone oil clutch fans primarily rely on an exposed metal coil at the front of the clutch to sense the airflow temperature behind the radiator, thereby controlling the silicone oil flow and thus altering the fan speed. Since airflow temperature is influenced by various factors, such as ambient temperature, vehicle speed, and coolant temperature, this control method is not precise enough. This results in a lag in fan speed adjustment, failing to respond in real-time to changes in engine coolant temperature, thus impacting engine fuel economy and long-term reliability.

[0004] There is currently no effective solution to the problem of low control precision of ordinary silicone oil clutch fans in existing technologies. Summary of the Invention

[0005] The main objective of this invention is to provide a silicone oil clutch fan to solve the technical problem of low control accuracy in ordinary silicone oil clutch fans in the prior art.

[0006] To achieve the above objectives, according to one aspect of the present invention, a silicone oil clutch fan is provided, comprising: a drive shaft having a cooling channel and a mounting groove therein, the mounting groove communicating with the cooling channel, and a drive plate connected to the drive shaft; a cover assembly including a front cover and a partition plate, an oil storage chamber being formed between the front cover and the partition plate, an oil inlet hole being provided on the partition plate, the front cover being inserted into the drive plate, a first working chamber being formed between the partition plate and the drive plate, the first working chamber communicating with the oil storage chamber through the oil inlet hole; a valve plate being movably connected to the partition plate, the valve plate having a first state of blocking the oil inlet hole and a second state of avoiding the oil inlet hole; and a temperature sensing assembly including a temperature sensing element disposed in the mounting groove, the temperature sensing element deforming by contacting the coolant in the cooling channel to drive the valve plate to switch between the first state and the second state.

[0007] Furthermore, the valve plate is located in the oil storage chamber and is connected to the partition plate by fasteners. The fasteners are located near the edge of the valve plate, and a protrusion is located in the middle of the valve plate. At least part of the protrusion extends into the mounting groove, and the temperature sensing element abuts and cooperates with the protrusion.

[0008] Furthermore, the valve plate is provided with a sealing plug, which is located near the edge of the valve plate and is positioned opposite the fastener along the radial direction of the valve plate. When the valve plate is in the first state, the sealing plug is inserted and engaged with the oil inlet hole.

[0009] Furthermore, the temperature sensing element includes: a housing, which is filled with a temperature sensing bulb and an elastic colloid, the temperature sensing bulb being wrapped around the outer wall of the elastic colloid; and a drive rod, one end of which extends into the housing and is connected to the elastic colloid, and the other end of which is connected to the valve plate.

[0010] Furthermore, the mounting groove includes a first groove segment and a second groove segment. The diameter of the first groove segment is smaller than that of the second groove segment. The first groove segment is located close to the cooling channel. The end of the first groove segment near the second groove segment forms a shoulder. The temperature sensing component also includes a mounting plate, which is sleeved on the outer wall of the housing. The mounting plate is interference-fitted with the second groove segment and abuts against the shoulder. The first groove segment and the mounting plate form a temperature sensing cavity, and the second groove segment and the mounting plate form a mounting cavity. The temperature sensing cavity and the mounting cavity are not interconnected, but the temperature sensing cavity is connected to the cooling channel.

[0011] Furthermore, the mounting plate abuts against the groove shoulder via a sealing gasket.

[0012] Furthermore, the cooling channel includes a first channel and a second channel, which are spaced apart circumferentially along the drive shaft, and both the first channel and the second channel are connected to the mounting groove.

[0013] Furthermore, the active plate has a first annular groove at one end near the partition, and the front cover is engaged with the first annular groove through the first annular teeth, forming a first gap between the first annular teeth and the first annular groove, which is connected to the first working cavity.

[0014] Furthermore, the active plate is provided with an oil passage hole, and the cover assembly also includes a rear cover, which is rotatably connected to the drive shaft and is inserted into the active plate. A second working chamber is formed between the rear cover and the active plate, and the second working chamber is connected to the first working chamber through the oil passage hole.

[0015] Furthermore, the active plate has a second annular groove at one end near the rear cover. The rear cover is engaged with the second annular groove through a second annular tooth. A second gap is formed between the second annular tooth and the second annular groove, and the second gap communicates with the second working cavity.

[0016] According to the technical solution of this invention, the drive shaft is provided with a cooling channel and a mounting groove. The mounting groove is connected to the cooling channel, and a temperature sensing element is located in the mounting groove. The engine coolant can enter the mounting groove through the cooling channel. The temperature sensing element can contact the coolant. The temperature sensing element deforms due to thermal expansion and contraction, thereby driving the valve plate to block and avoid the oil inlet hole. When the coolant temperature is too high, the temperature sensing element expands due to the high temperature, driving the valve plate to be in the second state. The silicone oil in the oil reservoir enters the first working chamber through the oil inlet hole. The silicone oil entering the first working chamber can fill the joint gap between the front cover and the drive plate, increasing the adhesion between the front cover and the drive plate and reducing the slip difference between the front cover and the drive plate, thereby increasing the blade speed and increasing the heat dissipation. When the coolant temperature is too low, the temperature sensing element retracts due to the low temperature, driving the valve plate to be in the first state, reducing the amount of silicone oil in the joint gap between the front cover and the drive plate, thereby reducing the adhesion between the front cover and the drive plate and increasing the slip difference between the front cover and the drive plate, thereby reducing the blade speed and reducing the heat dissipation. In the above solution, the temperature sensing element can directly sense the real-time temperature of the engine coolant, no longer relying on indirect measurement of the airflow temperature behind the radiator. It responds quickly through thermal expansion and contraction deformation to adjust the silicone oil flow rate, that is, different coolant temperatures correspond to different silicone oil flow rates. Thus, the blade speed is precisely controlled according to the coolant temperature. At the same time, the blade speed can also provide real-time feedback on the coolant temperature, achieving a high-precision closed-loop control effect. This solves the technical problem of low control accuracy of ordinary silicone oil clutch fans in the prior art. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0018] Figure 1 A cross-sectional schematic diagram of the silicone oil clutch fan in this application is shown;

[0019] Figure 2 A cross-sectional schematic diagram of the valve plate in this application is shown;

[0020] Figure 3 A cross-sectional schematic diagram of the partition in this application is shown;

[0021] Figure 4 A cross-sectional schematic diagram of the temperature sensing component in this application is shown;

[0022] Figure 5 A cross-sectional schematic diagram of the drive shaft in this application is shown;

[0023] Figure 6 A schematic diagram of the active board structure in this application is shown;

[0024] Figure 7 It shows Figure 6Cross-sectional view along the AA direction;

[0025] Figure 8 A cross-sectional schematic diagram of the front cover in this application is shown;

[0026] Figure 9 A cross-sectional schematic diagram of the rear cover in this application is shown.

[0027] The above figures include the following reference numerals:

[0028] 1. Drive shaft;

[0029] 11. Cooling channel; 111. First channel; 112. Second channel; 12. Mounting slot; 121. First slot section; 122. Second slot section; 123. Slot shoulder; 124. Positioning hole;

[0030] 2. Active board;

[0031] 21. First working chamber; 22. Second working chamber; 23. First annular groove; 24. Second annular groove; 25. Oil passage hole;

[0032] 3. Front cover;

[0033] 31. Oil storage chamber; 32. First annular tooth; 33. Oil return hole;

[0034] 4. Partition;

[0035] 41. Oil inlet hole; 42. Clearance hole; 43. Connecting hole;

[0036] 5. Valve plate;

[0037] 51. Fastener; 52. Protrusion; 521. Groove; 53. Seal / plug;

[0038] 6. Temperature sensing component;

[0039] 61. Temperature sensing element; 611. Housing; 6111. Limiting step; 612. Temperature sensing bulb; 613. Elastic colloid; 614. Drive rod; 62. Mounting plate; 63. Sealing gasket;

[0040] 7. Back cover;

[0041] 71. Second ring tooth;

[0042] 8. Leaves;

[0043] 9. Bearings. Detailed Implementation

[0044] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0046] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0047] Exemplary embodiments according to this application will now be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in many different forms and should not be construed as being limited to the embodiments set forth herein. It should be understood that these embodiments are provided so that the disclosure of this application is thorough and complete, and that the concept of these exemplary embodiments is fully conveyed to those skilled in the art. In the drawings, for clarity, the thickness of layers and regions may be exaggerated, and the same reference numerals are used to denote the same devices, and therefore their description will be omitted.

[0048] Combination Figures 1 to 9 As shown, according to a specific embodiment of this application, a silicone oil clutch fan is provided.

[0049] Specifically, the silicone oil clutch fan includes: a drive shaft 1, a cover assembly, a valve plate 5, and a temperature sensing component 6. The drive shaft 1 has a cooling channel 11 and a mounting groove 12, with the mounting groove 12 communicating with the cooling channel 11. A drive plate 2 is connected to the drive shaft 1. The cover assembly includes a front cover 3 and a partition 4. An oil storage chamber 31 is formed between the front cover 3 and the partition 4. The partition 4 has an oil inlet hole 41. The front cover 3 is inserted into the drive plate 2, forming a first working chamber 21 between the partition 4 and the drive plate 2. The first working chamber 21 communicates with the oil storage chamber 31 through the oil inlet hole 41. The valve plate 5 is movably connected to the partition 4. The valve plate 5 has a first state of blocking the oil inlet hole 41 and a second state of avoiding the oil inlet hole 41. The temperature sensing component 6 includes a temperature sensing element 61, which is disposed in the mounting groove 12. The temperature sensing element 61 deforms upon contact with the coolant in the cooling channel 11, thereby driving the valve plate 5 to switch between the first and second states.

[0050] In the embodiments of this application, the drive shaft 1 is provided with a cooling channel 11 and a mounting groove 12. The mounting groove 12 is connected to the cooling channel 11. A temperature sensing element 61 is disposed in the mounting groove 12. The engine coolant can enter the mounting groove 12 through the cooling channel 11. The temperature sensing element 61 can contact the coolant. The temperature sensing element 61 deforms due to thermal expansion and contraction to drive the valve plate 5 to block and avoid the oil inlet hole 41. When the coolant temperature is too high, the temperature sensing element 61 expands due to high temperature, driving the valve plate 5 to be in the second state. The silicone oil in the oil reservoir 31 enters the first working chamber through the oil inlet hole 41. 21. The silicone oil entering the first working chamber 21 can fill the joint gap between the front cover 3 and the active plate 2, increasing the adhesion between the front cover 3 and the active plate 2 and reducing the slip difference between the front cover 3 and the active plate 2, thereby increasing the rotational speed of the blade 8 and increasing the heat dissipation. When the coolant temperature is too low, the temperature sensing element 61 retracts due to the low temperature, and the drive valve plate 5 is in the first state, reducing the amount of silicone oil in the joint gap between the front cover 3 and the active plate 2, thereby reducing the adhesion between the front cover 3 and the active plate 2 and increasing the slip difference between the front cover 3 and the active plate 2, thereby reducing the rotational speed of the blade 8 and reducing the heat dissipation. In the above solution, the temperature sensing element 61 can directly sense the real-time temperature of the engine coolant, no longer relying on indirect measurement of the airflow temperature after the radiator. It can also quickly respond to thermal expansion and contraction deformation to adjust the silicone oil flow rate. That is, different coolant temperatures correspond to different silicone oil flow rates, thereby accurately controlling the rotation speed of the blade 8 according to the coolant temperature. At the same time, the rotation speed of the blade 8 can also provide real-time feedback on the coolant temperature, achieving a high-precision closed-loop control effect. This solves the technical problem of low control precision of ordinary silicone oil clutch fan in the prior art.

[0051] Furthermore, the valve plate 5 is located in the oil storage chamber 31. The valve plate 5 is connected to the partition plate 4 by fastener 51. The fastener 51 is located near the edge of the valve plate 5. The middle part of the valve plate 5 is provided with a protrusion 52. At least part of the protrusion 52 extends into the mounting groove 12. The temperature sensing element 61 abuts and cooperates with the protrusion 52.

[0052] In the embodiments of this application, one edge area of ​​the valve plate 5 is connected to the partition plate 4 by a fastener 51, and the other areas of the valve plate 5 are not fixed. The connection method is simple and reliable. When the middle part of the valve plate 5 is pushed by the temperature sensing element 61, the valve plate 5 deflects away from the partition plate 4 around the axis of the fastener 51 to avoid the oil inlet hole 41. After the push of the temperature sensing element 61 disappears, the valve plate 5 can spring back to the initial position to block the oil inlet hole 41.

[0053] like Figure 2 , Figure 3 As shown, the partition 4 is provided with an oil inlet hole 41, a clearance hole 42, and a connecting hole 43. The oil inlet hole 41 and the connecting hole 43 are located near the edge of the partition 4 and are arranged opposite each other in the radial direction of the partition 4. The clearance hole 42 is located at the center of the partition 4 and is coaxial with the drive shaft 1. The oil inlet hole 41 is a tapered hole. An edge area of ​​the valve plate 5 is connected to the connecting hole 43 on the partition 4 by a fastener 51, which is a rivet. A protrusion 52 is provided in the center area of ​​the valve plate 5. The protrusion 52 extends into the mounting groove 12 through the clearance hole 42 on the partition 4. A groove 521 is provided at one end of the protrusion 52 near the mounting groove 12. Part of the temperature sensing element 61 extends into the groove 521, and the end of the temperature sensing element 61 abuts against the bottom of the groove 521. The sealing plug 53 on the valve plate 5 is a conical plug, which is inserted and matched with the conical hole to adjust the opening of the oil inlet 41, thereby precisely controlling the flow rate of silicone oil. The valve plate 5 is an elastically deformable sheet structure, and the valve plate 5 can be made of metal or nylon.

[0054] Preferably, the valve plate 5 is provided with a sealing plug 53, which is disposed near the edge of the valve plate 5 and is disposed opposite to the fastener 51 along the radial direction of the valve plate 5. When the valve plate 5 is in the first state, the sealing plug 53 is inserted and engaged with the oil inlet hole 41. This arrangement can increase the distance between the sealing plug 53 and the center point of action of the valve plate 5, thereby improving the accuracy of the opening adjustment of the oil inlet hole 41.

[0055] Furthermore, the temperature sensing element 61 includes: a housing 611, a temperature sensing bulb 612, an elastic colloid 613, and a drive rod 614. The temperature sensing bulb 612 and the elastic colloid 613 are filled into the housing 611. The temperature sensing bulb 612 is wrapped around the outer wall of the elastic colloid 613. One end of the drive rod 614 extends into the housing 611 and is connected to the elastic colloid 613. The other end of the drive rod 614 is connected to the valve plate 5.

[0056] In the embodiments of this application, the elastic colloid 613 is wrapped by the temperature sensing bulb 612, and the drive rod 614 is connected to the elastic colloid 613. The temperature sensing bulb 612 expands as the coolant temperature rises, forcing the elastic colloid 613 to deform. The deformation force of the elastic colloid 613 is transmitted through the drive rod 614, thereby pushing the valve plate 5 to move, realizing the effective coupling of coolant temperature change and silicone oil flow control. This force transmission mechanism can respond more quickly and accurately, thereby precisely controlling the action of the valve plate 5 and realizing efficient management of silicone oil flow.

[0057] like Figure 4 As shown, the shell 611 has a T-shaped structure and includes a first segment and a second segment. The width of the first segment is greater than the width of the second segment, and a limiting step 6111 is formed at the end of the first segment closest to the second segment. The elastic colloid 613 has a T-shaped structure, with one end located within the first segment and abutting against the inner side of the limiting step 6111, and the other end located within the second segment. The elastic colloid 613 may be made of rubber. A temperature-sensing bulb 612 is disposed within the second segment and encloses the elastic colloid 613 located within the second segment. The temperature-sensing bulb 612 may be made of paraffin wax or an alcohol-ether mixture. The first end of the drive rod 614 is embedded in the elastic colloid 613 and connected to the elastic colloid 613. The second end of the drive rod 614 is located outside the housing 611. The second end of the drive rod 614 is directly opposite the protrusion 52 on the valve plate 5, and the second end of the drive rod 614 extends into the groove 521 of the protrusion 52 and abuts against the bottom of the groove 521.

[0058] Furthermore, the mounting groove 12 includes a first groove segment 121 and a second groove segment 122. The groove diameter of the first groove segment 121 is smaller than that of the second groove segment 122. The first groove segment 121 is located close to the cooling channel 11. The end of the first groove segment 121 near the second groove segment 122 forms a groove shoulder 123. The temperature sensing component 6 also includes a mounting plate 62. The mounting plate 62 is sleeved on the outer wall of the housing 611. The mounting plate 62 is interference-fitted with the second groove segment 122. The mounting plate 62 abuts against the groove shoulder 123. The first groove segment 121 and the mounting plate 62 form a temperature sensing cavity. The second groove segment 122 and the mounting plate 62 form a mounting cavity. The temperature sensing cavity and the mounting cavity are not interconnected. The temperature sensing cavity is connected to the cooling channel 11.

[0059] In the embodiments of this application, the temperature sensing element 61 is connected to the drive shaft 1 via the mounting plate 62. The mounting plate 62 divides the mounting groove 12 into a temperature sensing cavity and a mounting cavity. The temperature sensing cavity and the mounting cavity are not connected to each other to prevent coolant from flowing into the oil storage cavity 31 through the mounting cavity, thus isolating the silicone oil from the coolant.

[0060] like Figure 1 , Figure 5 , Figure 4 As shown, the mounting groove 12 includes a first groove segment 121 and a second groove segment 122. The groove diameter of the first groove segment 121 is smaller than that of the second groove segment 122. The first groove segment 121 is located close to the cooling channel 11. A groove shoulder 123 is formed at the end of the first groove segment 121 that is close to the second groove segment 122. A positioning hole 124 is formed at the bottom of the first groove segment 121. Mounting plate 62 is sleeved on the outer wall of the second component section of housing 611. Mounting plate 62 is interference-fitted with the second groove section 122. One end of mounting plate 62 abuts against the outer side of the limiting step 6111, and the other end of mounting plate 62 abuts against the groove shoulder 123. Part of the first component section of housing 611 extends into the positioning hole 124. Mounting plate 62 isolates the first groove section 121 and the second groove section 122. The first groove section 121 and mounting plate 62 form a temperature sensing cavity. The second component section of housing 611 is located in the temperature sensing cavity. The second groove section 122 and mounting plate 62 form a mounting cavity. The first component section of housing 611 is located in the mounting cavity, and the second end of drive rod 614 is located in the mounting cavity.

[0061] Preferably, the mounting plate 62 abuts against the groove shoulder 123 through the sealing gasket 63, which further improves the sealing performance of the temperature sensing cavity, so as to prevent coolant from flowing into the oil storage cavity 31 through the mounting cavity.

[0062] Furthermore, such as Figure 5 As shown, the cooling channel 11 includes a first channel 111 and a second channel 112. The first channel 111 and the second channel 112 are arranged circumferentially along the drive shaft 1. Both the first channel 111 and the second channel 112 are connected to the mounting groove 12.

[0063] In the embodiments of this application, the first flow channel 111 is connected to the second flow channel 112 through the mounting groove 12, that is, the coolant can enter the mounting groove 12 through the first flow channel 111 and then be discharged through the second flow channel 112, so that the coolant in the mounting groove 12 is updated in real time, thereby enabling the temperature sensing element 61 to accurately sense the real-time temperature of the engine coolant, accurately control the amount of silicone oil entering the engine, and improve the control accuracy of the silicone oil clutch fan.

[0064] Furthermore, the active plate 2 has a first annular groove 23 at one end near the partition 4. The front cover 3 is engaged with the first annular groove 23 by the first annular tooth 32. A first gap is formed between the first annular tooth 32 and the first annular groove 23. The first gap is connected to the first working cavity 21.

[0065] In the embodiments of this application, the first annular groove 23 and the first annular tooth 32 are inserted and engaged. After the silicone oil enters the first working chamber 21, it moves along the outer periphery under the action of centrifugal force to fill the first gap. Under the action of the silicone oil viscosity, the active plate 2 drives the front cover 3 to rotate.

[0066] like Figure 7 , Figure 8 As shown, the active plate 2 has a first annular groove 23 near the partition plate 4. There are multiple first annular grooves 23, which are coaxially arranged and located near the edge of the active plate 2. The front cover 3 has multiple first annular teeth 32, which are coaxially arranged and located near the edge of the front cover 3. The front cover 3 is engaged with the first annular grooves 23 through the first annular teeth 32, so that a first gap is formed between the first annular teeth 32 and the first annular grooves 23. The first gap is connected to the first working cavity 21.

[0067] like Figure 7 As shown, the front cover 3 is provided with an oil return hole 33. The oil return hole 33 is located near the edge of the front cover 3. One end of the oil return hole 33 is connected to the first working chamber 21, and the other end of the oil return hole 33 is connected to the oil storage chamber 31. Under the action of centrifugal force, the silicone oil in the first working chamber 21 flows back to the oil storage chamber 31 through the oil return hole 33, realizing the recycling of silicone oil.

[0068] Furthermore, the active plate 2 is provided with an oil passage hole 25, and the cover assembly also includes a rear cover 7, which is rotatably connected to the drive shaft 1, and the rear cover 7 is inserted into the active plate 2. A second working chamber 22 is formed between the rear cover 7 and the active plate 2, and the second working chamber 22 is connected to the first working chamber 21 through the oil passage hole 25.

[0069] In the embodiments of this application, the second working chamber 22 is connected to the first working chamber 21 through the oil passage 25, that is, the rear cover 7 and the front cover 3 share a common transmission mechanism, which is simple in structure.

[0070] Furthermore, the active plate 2 has a second annular groove 24 at one end near the rear cover 7. The rear cover 7 is engaged with the second annular groove 24 through the second annular tooth 71. A second gap is formed between the second annular tooth 71 and the second annular groove 24. The second gap is connected to the second working cavity 22.

[0071] In the embodiments of this application, the second annular groove 24 and the second annular tooth 71 are inserted and engaged. After the silicone oil enters the second working chamber 22 through the first working chamber 21, it moves along the outer periphery under the action of centrifugal force to fill the second gap. Under the action of the silicone oil viscosity, the active plate 2 drives the rear cover 7 to rotate.

[0072] like Figure 1 , Figure 7 , Figure 9As shown, the rear cover 7 is rotatably connected to the drive shaft 1 via bearing 9, and the blade 8 is connected to the rear cover 7. The active plate 2 has a second annular groove 24 near the rear cover 7. Multiple second annular grooves 24 are coaxially arranged and located near the edge of the active plate 2. The rear cover 7 has multiple second annular teeth 71, coaxially arranged and located near the edge of the rear cover 7. The rear cover 7 engages with the second annular grooves 24 via the second annular teeth 71, forming a second gap between them. This second gap communicates with the second working chamber 22. Under centrifugal force, the silicone oil in the second working chamber 22 moves along its outer periphery to fill the second gap. Due to the viscosity of the silicone oil, the active plate 2 drives the rear cover 7 to rotate, and the blade 8 rotates synchronously with the rear cover 7.

[0073] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0074] In addition to the above, it should be noted that the terms "one embodiment," "another embodiment," and "embodiment" used in this specification refer to specific features, structures, or characteristics described in connection with that embodiment, which are included in at least one embodiment described in the general description of this application. The appearance of the same expression in multiple places in the specification does not necessarily refer to the same embodiment. Furthermore, when a specific feature, structure, or characteristic is described in connection with any embodiment, the intention is to suggest that implementing such a feature, structure, or characteristic in conjunction with other embodiments also falls within the scope of this invention.

[0075] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0076] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A silicone oil clutch fan, characterized in that, include: A drive shaft (1) is provided with a cooling channel (11) and a mounting groove (12) inside the drive shaft (1). The mounting groove (12) is connected to the cooling channel (11). An active plate (2) is connected to the drive shaft (1). The cover assembly includes a front cover (3) and a partition (4). An oil storage cavity (31) is formed between the front cover (3) and the partition (4). An oil inlet hole (41) is provided on the partition (4). The front cover (3) is inserted into the active plate (2). A first working cavity (21) is formed between the partition (4) and the active plate (2). The first working cavity (21) is connected to the oil storage cavity (31) through the oil inlet hole (41). Valve plate (5), the valve plate (5) is movably connected to the partition plate (4), the valve plate (5) has a first state of blocking the oil inlet hole (41), and a second state of avoiding the oil inlet hole (41); Temperature sensing component (6), the temperature sensing component (6) includes a temperature sensing element (61), the temperature sensing element (61) is disposed in the mounting groove (12), the temperature sensing element (61) deforms by contacting the coolant in the cooling channel (11) to drive the valve plate (5) to switch between the first state and the second state.

2. The silicone oil clutch fan according to claim 1, characterized in that, The valve plate (5) is located in the oil storage chamber (31). The valve plate (5) is connected to the partition plate (4) by a fastener (51). The fastener (51) is located near the edge of the valve plate (5). The valve plate (5) has a protrusion (52) in the middle. At least part of the protrusion (52) extends into the mounting groove (12). The temperature sensing element (61) abuts against the protrusion (52).

3. The silicone oil clutch fan according to claim 2, characterized in that, The valve plate (5) is provided with a sealing plug (53), which is located near the edge of the valve plate (5). The sealing plug (53) is arranged opposite to the fastener (51) along the radial direction of the valve plate (5). When the valve plate (5) is in the first state, the sealing plug (53) is inserted into the oil inlet (41).

4. The silicone oil clutch fan according to claim 1, characterized in that, The temperature sensing element (61) includes: A housing (611) is filled with a temperature-sensing bulb (612) and an elastic colloid (613), wherein the temperature-sensing bulb (612) is wrapped around the outer wall of the elastic colloid (613); A drive rod (614) has one end extending into the housing (611) and connected to the elastic colloid (613), and the other end of the drive rod (614) is connected to the valve plate (5).

5. The silicone oil clutch fan according to claim 4, characterized in that, The mounting slot (12) includes a first slot segment (121) and a second slot segment (122). The diameter of the first slot segment (121) is smaller than the diameter of the second slot segment (122). The first slot segment (121) is located close to the cooling channel (11). A shoulder (123) is formed at one end of the first slot segment (121) near the second slot segment (122). The temperature sensing component (6) further includes: Mounting plate (62) is sleeved on the outer wall of housing (611). Mounting plate (62) is interference-fitted with second groove segment (122). Mounting plate (62) abuts against groove shoulder (123). First groove segment (121) and mounting plate (62) surround to form temperature sensing cavity. Second groove segment (122) and mounting plate (62) surround to form mounting cavity. Temperature sensing cavity and mounting cavity are not interconnected. Temperature sensing cavity is connected to cooling channel (11).

6. The silicone oil clutch fan according to claim 5, characterized in that, The mounting plate (62) abuts against the shoulder (123) via a sealing gasket (63).

7. The silicone oil clutch fan according to claim 1, characterized in that, The cooling channel (11) includes a first channel (111) and a second channel (112). The first channel (111) and the second channel (112) are arranged circumferentially along the drive shaft (1). Both the first channel (111) and the second channel (112) are connected to the mounting groove (12).

8. The silicone oil clutch fan according to claim 1, characterized in that, The active plate (2) has a first annular groove (23) at one end near the partition (4). The front cover (3) is inserted into the first annular groove (23) through the first annular tooth (32). A first gap is formed between the first annular tooth (32) and the first annular groove (23). The first gap is connected to the first working cavity (21).

9. The silicone oil clutch fan according to any one of claims 1-8, characterized in that, The active plate (2) is provided with an oil passage hole (25), and the cover assembly further includes: The rear cover (7) is rotatably connected to the drive shaft (1), and the rear cover (7) is inserted into the active plate (2). A second working chamber (22) is formed between the rear cover (7) and the active plate (2). The second working chamber (22) is connected to the first working chamber (21) through the oil passage (25).

10. The silicone oil clutch fan according to claim 9, characterized in that, The active plate (2) has a second annular groove (24) at one end near the rear cover (7). The rear cover (7) body is engaged with the second annular groove (24) through the second annular tooth (71). A second gap is formed between the second annular tooth (71) and the second annular groove (24). The second gap is connected to the second working cavity (22).

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