An electronically controlled silicone oil clutch

Abstract

Provided is an electrically controlled silicone oil clutch. The electrically controlled silicone oil clutch comprises a main shaft, an active plate, a valve plate mechanism, an electromagnet mechanism, a control system, a driven plate matched with the active plate and an oil system arranged between the active plate and the driven plate; the active plate is connected with the main shaft, and the valve plate mechanism is arranged on the active plate; the oil system comprises an oil storage cavity storing silicon oil, a power cavity engaging and disengaging the active plate and the driven plate, an oil outlet and an oil return hole, wherein the oil outlet and the oil return hole are connected with the oil storage cavity and the power cavity; the control system controls the valve plate to swing up and down by controlling the electromagnet mechanism so as to control opening and closing of the oil outlet; the valve plate mechanism comprises a spring, a valve plate and armature; the valve plate comprises a valve body and a valve head; the spring is arranged between the valve plate and the main shaft and used for driving reset of the valve head. The electrically controlled silicone oil clutch has the advantages that by adopting spring reset to replace valve plate tail fin prepressing angle elastic reset, the failure mode that due to use, the valve plate elasticity changes, and a valve is not switched off closely and cannot be switched on is eliminated, the service life of the valve body is prolonged, and the safety and the reliability are improved.

Description

technical field [0001] The invention relates to an electronically controlled silicon oil clutch. Background technique [0002] Energy conservation is a long-term policy of national economic development. According to relevant data, 5-10% of the energy consumption of the car is in the fan operation of the engine, and in the actual operation of the car engine, generally only the fan needs to keep running for 5-10% of the time to meet the cooling requirements, so In the prior art, there is a silicone oil fan clutch. The engine fan using this clutch can make the fan start to work when the engine needs to be cooled, and the fan does not work when the engine does not need to be cooled. [0003] Chinese Patent Application No. 201420370260.3 discloses a valve plate control mechanism of an electronically controlled silicone oil clutch, including an electromagnetic control system composed of an active mandrel, an electromagnetic coil, an electronic control circuit, and a driving disc ...

AI Technical Summary

Problems solved by technology

[0005] However, although the above-mentioned electronically controlled silicon oil clutch can realize the function of opening and closing the oil outlet hole, the above structure has the following defects: 1. the arrangement of the rotating magnet in this patent makes the structure of the electronically controlled silicon oil clutch very complicated

2. This patent uses a rotating magnet to drive the valve plate on the armature to rotate in a tangential direction to realize the technical means of opening and closing the oil outlet hole, which is difficult to achieve precise control of the rotation angle of the valve plate, such as: only the valve plate deflects at a certain angle Only after the oil return hole can be fully opened, this will cause the silicone oil in the oil storage chamber to not flow out of the oil return hole in time

3. The valve plate of this patent is set on the armature, the armature is set on the rotating magnet, and the spring is set under the rotating magnet. When the oil outlet hole needs to be closed, the return spring needs to reset the rotating magnet, the armature and the valve plate at the same time. The oil outlet hole is closed, this setting will inevitably lead to the failure of the spring and the problem of untimely reset--because there are too many structures pressing on the spring, the spring will bear a large pressure load

4. In this patent, the return ball is set on the return spring, which can indeed improve the sensitivity of the response, but it is precisely because of the existence of the spring ball that the accuracy of closing the oil outlet hole will be greatly reduced. The reason is that, There is a point contact between the spring ball and the rotating magnet, and it is well known that mechanical products will vibrate during the movement, and this vibration will cause the spring ball to roll on the rotating magnet, which will greatly reduce the opening and closing of the oil outlet hole. the accuracy of

5. This patent only uses the reset of the spring to drive the valve plate mechanism - the rotation of the valve plate, the armature and the rotating magnet to realize the closing of the oil hole. The driving method is very unreliable. Elastic fatigue, the electronically controlled silicone oil clutch will not be able to close the oil return hole, resulting in the problem of silicone oil still flowing out in cold car conditions, resulting in a waste of energy

[0009] Although this patent overcomes the unreliable problem of valve plate reset only by spring reset in the utility model patent with Chinese patent application number 201020505938.6, this patent still achieves oil discharge by rotating the valve plate at a certain angle. The opening and closing of the hole, so this patent also has the problem of inaccurate opening and closing of the oil outlet hole

[0010] Moreover, the valve plate mechanism of the silicone oil fan clutch also has the following problems. The preloading angle of the two tail fins punched by the valve plate screw is an important control point. Elastic changes caused by valve plate fatigue, which in turn affect the use of electronically controlled clutch assembly products

[0011] Therefore, how to manufacture a kind of elastic reset of the pre-compression angle that can replace the tail fin of the valve plate, so as to eliminate the failure mode caused by the change of the elasticity of the valve plate due to long-term use, which affects the valve’s lax closing and inaccurate opening and closing, has become a problem for those skilled in the art. Urgent technical issues to be resolved

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