Oil return structure of driving disc of silicone oil clutch

Abstract

The utility model discloses an oil return structure of a driving disc of a silicone oil clutch, which comprises a driving disc main body, an oil return channel is arranged on the driving disc main body, the oil return channel comprises an inlet section, an oil inlet section and an oil injection section which are communicated, the flow volume of the inlet section is larger than that of the oil inlet section, and the flow volume of the oil inlet section is larger than that of the oil injection section. The oil return channel is designed to be of the stepped structure comprising the inlet section, the oil inlet section and the oil injection section, the circulation amount of the inlet section is larger than that of the oil inlet section, and the circulation amount of the oil inlet section is larger than that of the oil injection section, so that the oil return pressure can be effectively increased in the oil return process. When the silicone oil flows, the structure can gradually guide and restrain the silicone oil, so that the silicone oil can flow back more orderly, the problem that the silicone oil cannot flow back smoothly under the action of centrifugal force of a traditional straight cylinder type oil duct is solved, and the oil return efficiency and the oil return effect are greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of silicone oil clutch, concretely to a kind of oil return structure of the driving disc of silicone oil clutch. BACKGROUND

[0002] As an important power transmission and control device, silicone oil clutch is widely used in automobile engine cooling fan system and the like. Its main working principle is based on the flow and distribution change of silicone oil in the clutch internal chamber to realize the clutch action between driving disc and driven disc, so as to control the rotating speed of cooling fan to adapt to the heat dissipation demand under different working conditions of engine.

[0003] In the design of traditional oil return structure of silicone oil clutch driving disc, straight cylinder oil passage is usually adopted. This straight cylinder oil passage exposes some deficiencies in long-term practical application. With the continuous improvement of automobile engine performance and the increasing requirement of fine control of heat dissipation system, the limitation of straight cylinder oil passage becomes more and more obvious.

[0004] Due to the structural characteristics that the diameter of straight cylinder oil passage is the same from beginning to end, it is difficult to effectively control the oil return pressure in the oil return process. When the clutch operates at high speed, centrifugal force has a great influence on silicone oil in the straight cylinder oil passage, so that the flow state of silicone oil in the oil passage is unstable, and the oil return effect is greatly reduced. Specifically, silicone oil is difficult to efficiently return along the expected oil return path under the action of centrifugal force, resulting in relatively more silicone oil remaining between driving disc and driven disc, and further affecting the precise control of clutch state between them. This directly causes the difficulty in effectively reducing the driven rotating speed, and when the engine does not need high rotating speed heat dissipation, the cooling fan still operates at high speed, which not only increases the power loss of engine, but also produces unnecessary noise, and also challenges the overall stability and reliability of cooling system.

[0005] In view of these problems of existing straight cylinder oil passage structure in the oil return of silicone oil clutch driving disc, it is urgent to improve and innovate the oil return structure to improve the oil return effect and realize the precise control of driven rotating speed, so as to meet the increasingly stringent performance requirements of modern automobile engine and heat dissipation system. INVENTION CONTENTS

[0006] In view of the deficiencies in the background art, the utility model provides an oil return structure of driving disc of silicone oil clutch.

[0007] The technical scheme adopted by the utility model is as follows: an oil return structure of driving disc of silicone oil clutch, comprising a driving disc body, an oil return channel is arranged on the driving disc body, the oil return channel comprises an inlet section, an oil inlet section and an oil injection section which are communicated, the flow capacity of the inlet section is greater than that of the oil inlet section, and the flow capacity of the oil inlet section is greater than that of the oil injection section.

[0008] Further, the cross sections of the inlet section, the oil inlet section and the oil injection section are circular structures, the diameter of the inlet section is greater than that of the oil inlet section, and the diameter of the oil inlet section is greater than that of the oil injection section.

[0009] Further, the diameter of the inlet section is 4-5mm, the diameter of the oil inlet section is 2.5-3.5mm, and the diameter of the oil injection section is 2-3mm.

[0010] Further, the length ratio of the inlet section to the oil inlet section is between 4:7 and 7:9.

[0011] Further, the main drive plate body is provided with an oil cavity, the outlet of the oil injection section is connected with the oil cavity, and a stepped structure gradually lowering to the bottom of the oil cavity is arranged between the outlet of the oil injection section and the bottom of the oil cavity.

[0012] Further, a flow converging groove is arranged at the inlet of the inlet section, the inlet of the inlet section is located at the end of the flow converging groove, and the end of the flow converging groove has an inclined surface inclined to the inlet.

[0013] The beneficial effects of the utility model are:

[0014] 1. Improve the oil return pressure and effect: by designing the oil return channel as a stepped structure including an inlet section, an oil inlet section and an oil injection section, and the flow capacity of the inlet section is greater than that of the oil inlet section, and the flow capacity of the oil inlet section is greater than that of the oil injection section, the oil return pressure can be effectively increased during the oil return process. When the silicone oil flows, this structure can gradually guide and constrain the silicone oil, making it more orderly backflow, overcoming the problem of poor backflow of silicone oil under the action of centrifugal force in the traditional straight cylinder oil way, greatly improving the oil return efficiency and effect.

[0015] 2. Reduce the follow-up speed: due to the significant improvement of the oil return effect, the residual amount of silicone oil between the driving plate and the driven plate can be accurately controlled and effectively reduced. This directly leads to the reduction of the follow-up speed of the driving plate. Experimental data proves that it can effectively reduce the follow-up speed from ≥350RPM to ≤230RPM. In the working condition that the engine does not need high speed heat dissipation, the cooling fan can run at a lower speed, thereby significantly reducing the power loss of the engine and improving the overall energy efficiency of the engine.

[0016] 3. Reduce noise generation: the reduction of the follow-up speed makes the speed fluctuation of the cooling fan during operation smaller, and the operation is more stable. The aerodynamic noise generated between the fan blades and the air due to high speed rotation and the structural noise generated due to mechanical vibration are effectively suppressed, improving the acoustic environment during vehicle operation and improving the driving comfort.

[0017] 4. Enhancing system stability and reliability: Precise oil return structure design helps the silicone oil clutch to maintain stable clutching state under various working conditions. Whether the engine is in high load or low load operating state, the speed of the cooling fan can be accurately controlled to avoid abnormal fluctuations in the clutching state caused by poor oil return. This not only prolongs the service life of the silicone oil clutch itself, reduces the cost increase and time waste caused by fault maintenance, but also plays a key supporting role in the stability and reliability of the entire automobile engine cooling system, ensuring the safe and reliable operation of the automobile under various complex road conditions and use conditions.

[0018] In addition to the purposes, features and advantages described above, the present application has other purposes, features and advantages. The present application will be described in further detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 is a structural schematic view of the present application.

[0020] Fig. 2 is another side view of the present application.

[0021] Fig. 3 is a cross-sectional view of the oil return passage of the present application.

[0022] Figs. 1-3 Center: 1, driving disc body; 2, oil return passage; 3, inlet section; 4, oil inlet section; 5, oil injection section; 6, oil cavity; 7, stepped structure; 8, converging groove; 9, inclined surface. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It should be noted that if the present application embodiments involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] The present application provides an oil return structure of a driving disc of a silicone oil clutch.

[0026] In the present embodiment, reference is made to Figs. 1-3The oil return structure of the driving disc of the silicone oil clutch comprises a driving disc body 1, wherein the driving disc body 1 is provided with an oil return channel 2, the oil return channel 2 comprises an inlet section 3, an oil inlet section 4 and an oil injection section 5 which are communicated, the flow capacity of the inlet section 3 is greater than that of the oil inlet section 4, and the flow capacity of the oil inlet section 4 is greater than that of the oil injection section 5.

[0027] In the above technical solution, the oil return channel comprising the communicated inlet section, oil inlet section and oil injection section is provided, and the flow capacities thereof are sequentially decreased, thereby constructing a brand-new oil return structure. The structure can form a reasonable pressure gradient in the oil return process according to the flow capacity difference of different sections, effectively guide the silicone oil to flow smoothly from the inlet section to the oil injection section, avoid the problems of silicone oil retention and disordered flow which are prone to occur when the silicone oil returns through the traditional straight cylinder oil channel, thereby laying a foundation for improving the efficiency and stability of the entire oil return system, fundamentally changing the flow characteristics of the silicone oil in the driving disc oil return channel and optimizing the basic process of oil return.

[0028] Specifically, the cross sections of the inlet section, oil inlet section and oil injection section are circular structures, the diameter of the inlet section is greater than that of the oil inlet section, and the diameter of the oil inlet section is greater than that of the oil injection section.

[0029] In the embodiment, the cross sections of the inlet section, oil inlet section and oil injection section are circular structures. The circular structure has good fluid mechanics performance, can reduce the turbulence and energy loss of the silicone oil in the flow process while ensuring the flow capacity difference of different sections. The larger diameter of the inlet section facilitates the silicone oil to quickly enter the oil return channel, and the gradually decreasing diameters of the oil inlet section and oil injection section can gradually increase the flow rate and pressure of the silicone oil, further enhance the oil return effect and ensure that the silicone oil can be efficiently transmitted in the oil return channel and finally returned to the oil cavity according to the design requirements, thereby improving the reliability and stability of the entire oil return structure.

[0030] In addition to the circular structure, the inlet section, oil inlet section and oil injection section can also adopt structures such as an elliptical structure or a directional structure (a square structure, a rectangular structure, a polygonal structure) as long as the flow capacity of the front end is greater than that of the rear end, so that the technical purpose of the application can be achieved.

[0031] Specifically, the diameter of the inlet section is 4-5 mm, the diameter of the oil inlet section is 2.5-3.5 mm, and the diameter of the oil injection section is 2-3 mm.

[0032] In the embodiment, the diameter sizes of the inlet section, the oil inlet section and the oil injection section are specifically defined, so as to accurately control the flow capacity of each section. The diameter of the inlet section is in the range of 4-5 mm, which ensures sufficient silicon oil entering amount; the diameter of the oil inlet section is 2.5-3.5 mm, which can moderately limit the flow and accelerate the silicon oil; and the diameter of the oil injection section is 2.4 mm, which makes the silicon oil spray into the oil cavity at a suitable speed and pressure. Such size design can accurately match the oil return requirement of the silicon oil clutch under different working conditions, realize fine control of the oil return process, improve the adaptability of the oil return structure to different working conditions, ensure the stability and reliability of the clutch working performance, and effectively reduce the risk of abnormal increase of the follow-up speed caused by poor oil return.

[0033] Specifically, the length ratio of the inlet section to the oil inlet section is between 4:7 and 7:9.

[0034] In the embodiment, the length ratio of the inlet section to the oil inlet section is between 4:7 and 7:9, which optimizes the transition flow of the silicon oil between the inlet section and the oil inlet section. The appropriate length ratio can make the silicon oil fully adjust the flow state before entering the oil inlet section, reduce the flow resistance and turbulence phenomenon caused by sudden diameter change, make the silicon oil flow more smoothly from the inlet section into the oil inlet section, and further improve the uniformity and stability of the silicon oil flow in the entire oil return channel, which is beneficial to improve the oil return efficiency, reduce energy loss, and further ensure the stable operation of the oil return system under different working conditions, and plays a key role in maintaining the overall performance of the silicon oil clutch.

[0035] Specifically, the driving disc body is provided with an oil cavity 6, the outlet of the oil injection section is connected with the oil cavity 6, and a stepped structure 7 gradually lowering to the bottom of the oil cavity is arranged between the outlet of the oil injection section and the bottom of the oil cavity.

[0036] In the embodiment, the stepped structure gradually lowering is arranged between the outlet of the oil injection section and the bottom of the oil cavity, which can guide the silicon oil to flow along the set path to the bottom of the oil cavity when the silicon oil is sprayed from the oil injection section into the oil cavity, avoid the formation of vortex or turbulence of the silicon oil at the inlet of the oil cavity, and make the distribution of the silicon oil in the oil cavity more uniform and orderly.

[0037] Specifically, a flow converging groove 8 is arranged at the inlet of the inlet section, the inlet of the inlet section is located at the end of the flow converging groove 8, and the end of the flow converging groove has an inclined surface 9 inclined to the inlet.

[0038] In the embodiment, the inlet section is provided with a flow collection groove at the inlet and an inclined slope at the end, the flow collection groove can play a role of collection and buffering when the silicon oil flow appears fluctuation or a small amount of reflux, so that the silicon oil can flow more smoothly into the inlet section. The inclined slope further guides the silicon oil to flow into the inlet section, reduces the accumulation and resistance of the silicon oil at the inlet, improves the response capability of the oil return structure to the abnormal situation of the silicon oil flow, ensures the continuity and stability of the oil return process, reduces the possibility of poor oil return caused by external factors, and thus maintains the stable operation of the silicon oil clutch under complex working conditions.

[0039] Skilled persons should know: although the utility model has been described according to the above specific embodiments, the utility model idea is not limited to this utility model, and any modification using the utility model idea will be included in the patent protection range.

Claims

1. An oil return structure for an active disc of a silicone oil clutch, comprising an active disc body, wherein the active disc body is provided with an oil return channel, and characterized in that: The oil return channel includes an inlet section, an oil inlet section and an oil injection section which are connected. The flow rate of the inlet section is greater than that of the oil inlet section, and the flow rate of the oil inlet section is greater than that of the oil injection section.

2. The oil return structure of the active plate of the silicone oil clutch according to claim 1, characterized in that: The cross sections of the inlet section, the oil inlet section and the oil injection section are all circular structures, the diameter of the inlet section is larger than the diameter of the oil inlet section, and the diameter of the oil inlet section is larger than the diameter of the oil injection section.

3. The oil return structure of the active plate of the silicone oil clutch according to claim 2, characterized in that: The diameter of the inlet section is 4-5 mm, the diameter of the oil inlet section is 2.5-3.5 mm, and the diameter of the oil injection section is 2-3 mm.

4. The oil return structure of the active plate of the silicone oil clutch according to any one of claims 1 to 3, characterized in that: The ratio of the length of the inlet section to the length of the oil inlet section is between 4:7 and 7:

9.

5. The oil return structure of the active plate of the silicone oil clutch according to claim 1, characterized in that: An oil cavity is provided on the main body of the active disc, the outlet of the oil injection section is connected to the oil cavity, and a stepped structure which gradually descends toward the bottom of the oil cavity is provided between the outlet of the oil injection section and the bottom of the oil cavity.

6. The oil return structure of the active plate of the silicone oil clutch according to claim 1, characterized in that: A confluence groove is provided at the inlet of the inlet section. The inlet of the inlet section is located at the end of the confluence groove, and the end of the confluence groove has an inclined surface inclined toward the inlet.

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