阅读说明：本技术 一种具有旋向沟槽结构的磁流变离合器从动盘 (Magneto-rheological clutch driven disc with rotary groove structure ) 是由 尹必峰 徐波 贾和坤 胡南镕 匡欣 解玄 于 2021-09-28 设计创作，主要内容包括：本发明公开了一种具有旋向沟槽结构的磁流变离合器从动盘,包括从动盘本体；所述从动盘本体上与主传动盘相对的工作表面上设有具有旋向的沟槽,所述沟槽的旋向与主传动盘转动方向一致。有益效果：本发明在磁流变离合器从动盘本体工作表面设置具有旋向的沟槽以增强其接合状态下扭矩传递能力的同时,降低离合器工作时磁流变液的流动阻力,加快流动速率,兼顾增大从动盘本体工作表面对流换热面积,强化散热,进而达到了增强磁流变离合器传动扭矩与降低温升的双重功效,能够有效增强磁流变离合器的扭矩传递能力,同时增强磁流变离合器传动盘的冷却散热能力。(The invention discloses a magneto-rheological clutch driven disc with a rotary groove structure, which comprises a driven disc body; and a groove with a rotation direction is arranged on the working surface of the driven disc body opposite to the main driving disc, and the rotation direction of the groove is consistent with the rotation direction of the main driving disc. Has the advantages that: the working surface of the driven disc body of the magnetorheological clutch is provided with the grooves with the turning directions to enhance the torque transmission capacity of the driven disc body in the joint state, meanwhile, the flow resistance of the magnetorheological fluid is reduced when the magnetorheological clutch works, the flow rate is accelerated, the convective heat transfer area of the working surface of the driven disc body is increased, the heat dissipation is enhanced, the dual effects of enhancing the transmission torque of the magnetorheological clutch and reducing the temperature rise are further achieved, the torque transmission capacity of the magnetorheological clutch can be effectively enhanced, and the cooling and heat dissipation capacity of the driving disc of the magnetorheological clutch is enhanced.)

1. A magneto-rheological clutch driven disc with a rotary groove structure comprises a driven disc body (1); the method is characterized in that: the driven disc is characterized in that a groove (3) with a rotating direction is formed in the working surface, opposite to the main transmission disc (2), of the driven disc body (1), and the rotating direction of the groove (3) is consistent with the rotating direction of the main transmission disc (2).

2. The magnetorheological clutch driven disc having the unidirectional groove structure of claim 1, wherein: the groove (3) is a fan-shaped groove (31), the rotating shaft of the driven disc body (1) is used as the center and is unfolded towards the circumferential direction, the number of the fan-shaped grooves (31) is at least 3, and the fan-shaped grooves (31) are identical in structure and are uniformly distributed on the working surface of the driven disc body (1) along the circumferential direction at equal angles.

3. The magnetorheological clutch driven disc having the unidirectional groove structure of claim 2, wherein: the width L of the profile of the intersection of the fan-shaped groove (31) and the working surface of the driven disc body (1) is gradually widened from the center to the outer side, the width of the fan-shaped groove is increased in an equal gradient manner from the center along the radial direction, and the width range is 0-20 mm.

4. The magnetorheological clutch driven disc with the unidirectional groove structure according to claim 2 or 3, wherein: the depths from the working surface of the driven disc body (1) to the bottoms of the fan-shaped grooves (31) are equal, and the depth ranges from 1 mm to 10 mm.

5. The magnetorheological clutch driven disc with the unidirectional groove structure according to claim 2 or 3, wherein: the depth from the working surface of the driven disc body (1) to the bottom of the fan-shaped groove (31) is the depth of the fan-shaped groove (31), the depth of the fan-shaped groove (31) is increased in an equal gradient manner from the center along the radial direction, and the depth change range is 0-10 mm.

6. The magnetorheological clutch driven disc having the unidirectional groove structure of claim 1, wherein: the groove (3) is a spiral groove (32), the central spiral line of the spiral groove (32) is an equidistant spiral line and is distributed at equal intervals along the radial direction, the interval range is 10-100mm, and the initial pole diameter range of the central spiral line is 10-20 mm.

7. The magnetorheological clutch driven disc having the unidirectional groove structure of claim 6, wherein: the width L of the profile of the intersection of the spiral groove (32) and the working surface of the driven disc body (1) is gradually widened from the center to the outer side, the width of the spiral groove (32) is increased in an equal gradient manner from the center along the circumferential direction, and the width range is 0-20 mm.

8. The magnetorheological clutch driven disc having the unidirectional groove structure of claim 7, wherein: the depth from the working surface of the driven disc body (1) to the bottom of the spiral groove (32) gradually becomes deeper from the center to the outer side, the depth of the spiral groove (32) is increased in an equal gradient manner from the center along the circumferential direction, and the depth range is 0-10 mm.

Technical Field

The invention relates to a clutch part, in particular to a magneto-rheological clutch driven disc with a turning groove structure, and belongs to the technical field of automobile transmission.

Background

In recent years, magnetorheological clutches which take intelligent magnetorheological fluid as a working medium are developed rapidly. The magneto-rheological clutch is a liquid type transmission clutch which realizes the engagement and the disengagement of the clutch by controlling the magnetic field intensity between a driving disc and a driven disc of the magneto-rheological clutch by means of electromagnetic induction, thereby achieving the purpose of controlling the clutch to transmit power outwards. The rapid reversible change of the physical properties of the intelligent material magnetorheological fluid, such as heat conduction property and mechanical property, particularly the rheological property under the action of a magnetic field becomes the key of the power transmission of the magnetorheological clutch. It is mainly made up by mixing ferromagnetic granules with high magnetic permeability, carrier liquid and additive according to a certain proportion. Under the engagement state of the magnetorheological clutch, under the action of an external magnetic field, ferromagnetic particles in the magnetorheological fluid are connected with each other to form a magnetic chain under the action of the magnetic field, a 'curing effect' is generated, and the rheological property of the magnetorheological fluid is rapidly changed in a reversible manner along with the disappearance of the magnetic field, so that the magnetorheological fluid shows good fluidity.

Compared with the traditional power transmission device, the magneto-rheological clutch has the advantages of small noise, quick response, simple control, small abrasion of transmission parts, stepless speed change realization and the like, overcomes the defects of large noise, unstable torque and the like of the traditional clutch, and is a novel electromechanical transmission control device. However, the magnitude of the controllable output torque transmitted by the magnetorheological clutch mainly depends on the shear yield strength of the magnetorheological fluid material, and the insufficient shear torque of the magnetorheological clutch is always an important reason for limiting the development of the magnetorheological clutch. In the prior art, the mode of increasing the number of the annular coils is adopted, the magnetic field intensity is improved, so that the shearing moment is increased, and the capacity of enhancing the transmission torque and power is realized. However, with the increase of the number of the annular coils, the energy consumption of the magnetorheological clutch becomes large, and the temperature of the driving disc, the driven disc and the magnetorheological fluid of the clutch rises, and the like. Therefore, how to effectively enhance the torque transmission of the magnetorheological clutch, and meanwhile, the heat dissipation performance is enhanced, and the maximum temperature rise of the magnetorheological clutch is reduced becomes the key of the development of the magnetorheological clutch.

Disclosure of Invention

The purpose of the invention is as follows: the invention aims to solve the problems in the prior art and provides a magnetorheological clutch driven disc with a rotary groove structure. When the magnetorheological clutch is in an engaged state, under the action of centrifugal force during high-speed rotation, the flow resistance of the magnetorheological fluid is reduced by utilizing the upward-rotating groove structure of the driven disc, so that more ferromagnetic particles are gathered towards the outer edge of the working surface of the driven disc, the magnetic mechanical barrier effect is enhanced, and the sliding of a microfluidic medium on the surface of the microfluidic medium is inhibited; the design of gradient change of width and depth along the outward direction of the center can ensure that more magnetorheological fluid is stored at the outer end of the driven disc, more ferromagnetic particles are gathered, the transmission force arm is enlarged, and the transmission torque is increased; meanwhile, the fan-shaped or spiral groove with the turning direction consistent with the rotating direction of the main driving disc is arranged on the surface of the driven disc of the magnetorheological clutch, so that the flow resistance of the magnetorheological fluid under the high-speed rotation of the clutch is reduced, the flow speed is accelerated, the heat transfer rate is improved, the heat convection area between the driven disc and the magnetorheological fluid is increased by the groove, the heat dissipation capacity is improved, and the dual effects of increasing the transmission torque and strengthening the heat transfer are achieved.

The technical scheme is as follows: a magneto-rheological clutch driven disc with a rotary groove structure comprises a driven disc body; and a groove with a rotation direction is arranged on the working surface of the driven disc body opposite to the main driving disc, and the rotation direction of the groove is consistent with the rotation direction of the main driving disc.

The invention solves the problem of insufficient shearing torque in the transmission process of the magneto-rheological clutch through the grooves with the rotating directions; when the magnetorheological clutch is in a high-speed running state, under the action of centrifugal force, the magnetorheological fluid ferromagnetic particles are gathered towards the outer edge of the driven disc by utilizing the flow guide effect with the turning groove structure, so that the transmission force arm is increased, and the transmission capacity is enhanced.

Preferably, in order to utilize the diversion function of the structure of the turning groove, the magnetorheological fluid ferromagnetic particles are gathered towards the outer edge of the driven disc body, the power transmission arms are increased, and the capacity of transmitting torque is enhanced, the grooves are fan-shaped grooves, the grooves are spread towards the circumferential direction by taking the rotating shaft of the driven disc body as the center, the number of the fan-shaped grooves is at least 3, and the structures of the fan-shaped grooves are uniformly distributed on the working surface of the driven disc body at equal angles along the circumferential direction.

Preferably, in order to store the magnetorheological fluid in more space and strengthen the magneto-mechanical barrier effect, the shear stress transmitted from the magnetorheological fluid to the working surface of the driven disc body is further enhanced; the width L of the profile of the intersection of the fan-shaped groove and the working surface of the driven disc body is gradually widened from the center to the outer side, the width of the fan-shaped groove is increased in an equal gradient manner from the center along the radial direction, and the width range is 0-20 mm.

Preferably, in order to store the magnetorheological fluid in more space and strengthen the magneto-mechanical barrier effect, the shear stress transmitted from the magnetorheological fluid to the working surface of the driven disc body is further enhanced; the depths from the working surface of the driven disc body to the bottom of the fan-shaped groove are equal, and the value range of the depths is 1-10 mm.

Preferably, in order to store more magnetorheological fluid at the outer end of the driven disc and gather more ferromagnetic particles, the transmission force arm is enlarged, and the transmission torque is increased; the depth from the working surface of the driven disc body to the bottom of the fan-shaped groove is the depth of the fan-shaped groove, the depth of the fan-shaped groove is increased in an equal gradient manner from the center along the radial direction, and the depth change range is 0-10 mm.

Preferably, the grooves are spiral grooves, the central spiral line of each spiral groove is an equidistant spiral line, namely an Archimedes spiral line, and is distributed at equal intervals along the radial direction, the interval range is 10-100mm, and the initial pole diameter range of the central spiral line is 10-20 mm.

Preferably, the width L of the profile of the intersection of the spiral groove and the working surface of the driven disc body is gradually widened from the center to the outer side, the width of the spiral groove is increased in an equal gradient from the center along the circumferential direction, and the width ranges from 0mm to 20 mm.

Preferably, the depth from the working surface of the driven disc body to the bottom of the spiral groove gradually becomes deeper from the center to the outer side, the depth of the spiral groove increases in an equal gradient manner from the center along the circumferential direction, and the depth range is 0-10 mm.

According to the requirements of increasing the shearing moment and strengthening the heat dissipation capacity of the surface of the transmission disc under the engagement state of the magnetorheological clutch, the working surface of the driven disc body is provided with the spiral groove structure which comprises a fan shape and a spiral shape, so that on one hand, magnetorheological fluid ferromagnetic particles are gathered towards the outer edge of the driven disc body, a power transmission arm is increased, the torque transmission capacity is enhanced, and on the other hand, the flow resistance of the magnetorheological fluid is reduced and the heat dissipation capacity is strengthened by utilizing the flow guide effect of the spiral groove structure; the groove structure with the depth and width gradient changes is arranged on the outer side of the center, so that the grooves on the outer side of the driven disc body have more spaces for storing magnetorheological fluid, the magneto-mechanical barrier effect is strengthened, the shearing stress transmitted to the surface of the transmission disc by the magnetorheological fluid is further strengthened, the heat convection area of the working surface of the transmission disc is increased while the shearing torque is improved, and the dual optimization of strengthening the transmission torque of the magnetorheological clutch and strengthening the heat transfer is achieved.

Has the advantages that: the working surface of the driven disc body of the magnetorheological clutch is provided with the grooves with the turning directions to enhance the torque transmission capacity of the driven disc body in the joint state, meanwhile, the flow resistance of the magnetorheological fluid is reduced when the clutch works, the flow rate is accelerated, the convective heat transfer area of the working surface of the driven disc body is increased, the heat dissipation is enhanced, and the dual effects of enhancing the transmission torque of the magnetorheological clutch and reducing the temperature rise are achieved. When the magnetorheological clutch is in a joint state, under the action of centrifugal force during high-speed rotation, the flow resistance of the magnetorheological fluid is reduced by utilizing the spiral grooves on the working surface of the driven disc body, so that more ferromagnetic particles are gathered towards the outer edge of the working surface of the driven disc, the magneto-mechanical barrier effect is strengthened, the sliding of a microfluidic medium on the surface of the microfluidic medium is inhibited, and the shear stress of the magnetorheological fluid is enhanced; the design of the gradient change of the width and the depth of the outer side of the center enables the outer edge of the transmission disc to store more magnetorheological fluid, gather more ferromagnetic particles, increase the transmission force arm and increase the transmission torque. Meanwhile, the fan-shaped or spiral groove with the turning direction consistent with the rotating direction of the driving disc is arranged on the working surface of the driven disc body of the magnetorheological clutch, the flow resistance of the magnetorheological fluid under the high-speed rotation of the clutch is reduced, the flow speed is accelerated, the heat transfer rate is improved, the heat convection area between the transmission disc and the magnetorheological fluid is increased by the groove, the heat dissipation capacity is improved, and the dual effects of enhancing the transmission torque and enhancing the heat transfer are further achieved. Therefore, the torque transmission capacity of the magnetorheological clutch can be effectively enhanced, and the cooling and heat dissipation capacity of the transmission disc of the magnetorheological clutch is enhanced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a schematic diagram of the operation of a magnetorheological clutch of the present invention;

FIG. 2 is a front view of a scalloped groove driven disk body in accordance with a first embodiment of the present invention;

FIG. 3 is a cross-sectional view of a first embodiment of the present invention;

FIG. 4 is a cross-sectional view of a second embodiment of the present invention;

fig. 5 is a front view of a spiral groove driven disk body in a third embodiment of the present invention.

FIG. 6 is a cross-sectional view of a third embodiment of the present invention;

fig. 7 is a cross-sectional view of a fourth embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Magnetorheological clutch embodiments

As shown in fig. 1, 2 and 5, a driven disc of a magnetorheological clutch with a spiral groove structure comprises a driven disc body 1; the working surface of the driven disc body 1 opposite to the main driving disc 2 is provided with a groove 3 with a rotating direction, and the rotating direction of the groove 3 is consistent with the rotating direction of the main driving disc 2.

First example of Trench Structure

As shown in fig. 2 and 3, the grooves 3 are fan-shaped grooves 31, which are spread in the circumferential direction around the rotation axis of the driven disk body 1, the number of the fan-shaped grooves 31 is at least 3, and preferably 4 to 12, and the fan-shaped grooves 31 are equally distributed on the working surface of the driven disk body 1 at equal angles in the circumferential direction.

The width L of the intersecting outline of the fan-shaped groove 31 and the working surface of the driven disc body 1 is gradually widened from the center to the outer side, the width of the fan-shaped groove is increased along the radial direction from the center in an equal gradient way, and the width range is 0-20 mm.

The depths from the working surface of the driven disc body 1 to the bottom of the fan-shaped groove 31 are equal, and the depth ranges from 1 mm to 10 mm.

Second example of trench junction

As shown in fig. 2 and 4, the depth from the working surface of the driven plate body 1 to the bottom of the fan-shaped groove 31 is the depth of the fan-shaped groove 31, the depth of the fan-shaped groove 31 increases in an equal gradient manner along the radial direction from the center, and the depth ranges from 0mm to 10 mm.

Third example of Trench Structure

As shown in fig. 5 and 6, the groove 3 is a spiral groove 32, the central spiral line of the spiral groove 32 is an equidistant spiral line, i.e., an archimedes spiral line, and is distributed at equal intervals along the radial direction, the interval range is 10-100mm, and the initial pole diameter range of the central spiral line is 10-20 mm.

The width L of the intersecting outline of the spiral groove 32 and the working surface of the driven disc body 1 is gradually widened from the center to the outer side, the width of the spiral groove 32 is increased in an equal gradient from the center along the circumferential direction, and the width range is 0-20 mm.

Fourth example of Trench Structure

As shown in fig. 5 and 7, the groove 3 is a spiral groove 32, the central spiral line of the spiral groove 32 is an equidistant spiral line, i.e., an archimedes spiral line, and is distributed at equal intervals along the radial direction, the interval range is 10-100mm, and the initial pole diameter range of the central spiral line is 10-20 mm.

The width L of the intersecting outline of the spiral groove 32 and the working surface of the driven disc body 1 is gradually widened from the center to the outer side, the width of the spiral groove 32 is increased in an equal gradient from the center along the circumferential direction, and the width range is 0-20 mm.

The depth from the working surface of the driven disc body 1 to the bottom of the spiral groove 32 gradually becomes deeper from the center to the outer side, the depth of the spiral groove 32 increases in an equal gradient manner from the center along the circumferential direction, and the depth range is 0-10 mm.

By adopting the magnetorheological clutch with the driven disc with the rotary groove structure, the shearing torque of the magnetorheological clutch can be effectively enhanced, the surface heat dissipation area of the driving disc is increased, and the comprehensive optimization effects of enhancing the torque transmission and heat dissipation capacity and reducing the highest temperature rise are achieved. When the magnetorheological clutch is in an engaged state, a magneto-mechanical barrier is formed by utilizing a groove structure on the working surface of the transmission disc body, so that the sliding of a microfluidic medium on the surface of the microfluidic medium is inhibited, the shear stress of the magnetorheological fluid is enhanced, and the transmission torque is improved; according to the centrifugal force action of the transmission disc of the magnetorheological clutch in a high-speed running state, the linear velocity difference and the temperature distribution difference of different radial positions of the driven disc are taken into consideration, the groove structure with the depth and the width changing in a gradient manner is arranged in the radial direction, the flow resistance of the magnetorheological fluid under the high-speed rotation of the clutch is reduced, the flow speed is increased, the heat transfer rate is improved, the heat convection area between the transmission disc and the magnetorheological fluid is increased through the grooves, the heat dissipation capacity is improved, and the dual effects of enhancing the transmission torque and enhancing the heat transfer are achieved. Therefore, the torque transmission capacity of the magnetorheological clutch can be effectively enhanced, and the cooling and heat dissipation capacity of the transmission disc of the magnetorheological clutch is enhanced.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.