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Centrifugal magnetofluid clutch

A magnetorheological fluid and clutch technology, used in fluid clutches, clutches, mechanical equipment, etc., can solve the problems of magnetorheological fluids such as low shear stress resistance, high transmission torque, short service life, etc. The effect of large transmission torque and long service life

Inactive Publication Date: 2005-07-13
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

They often have the following disadvantages more or less: ① Slow speed of engagement or separation (that is, slow response), and impact; ② Loud noise and large inertia; ③ Serious friction, wear and heat, and short service life; ④ Inconvenient control
Although they overcome the shortcomings of traditional clutches, due to the small shear stress of magnetorheological fluid (80kp ~ 100kp)
So it is difficult to achieve high transmission torque

Method used

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  • Centrifugal magnetofluid clutch
  • Centrifugal magnetofluid clutch
  • Centrifugal magnetofluid clutch

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Embodiment Construction

[0014] The embodiment of the present invention is as follows: the outer diameter of the disc-shaped slider is 120 mm, the thickness is 50 mm, the wedge angle is 9.6 degrees, and the mass of each block is about 1.1 kg. Spring preload 50N. The gap between the slider and the slope of the housing is 1.5mm at rest. The shaft diameter is 20mm. The electromagnetic coil is wound with 0.6mm enameled wire, the winding is 800-1000 turns, the inner diameter is 130mm, the resistance is 20Ω, the maximum working current is 2A, and the maximum input power is 80W. The magnetorheological fluid produced by Lord Company of the United States is used. If the traditional method is used, the clutch composed of fixed discs can provide a torque of 50Nm at the same size, 5kW power can be transmitted at a speed of 1000 rpm, and 15kW power can be transmitted at a speed of 3000 rpm. And use the clutch that the dish-shaped slide block that has centrifugal self-pressurizing function of the present inventi...

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Abstract

The centrifugal magneto-rheological fluid clutch proposed by the present invention relates to a clutch device, in particular to a device that uses magneto-rheological fluid to generate transmission torque. The clutch includes an input shaft 10, an output shaft 8, a magneto-rheological fluid, an electromagnetic coil 1, and a clutch body, etc., wherein the clutch body is a disc-shaped casing 4 and a slider 5, and the slider can slide radially under the action of centrifugal force. The effect of automatic pressurization is generated, so that the shear stress of the magnetorheological fluid is greatly improved. It overcomes the shortcomings of traditional clutches such as slow response, impact and noise, severe heat generation, and inconvenient control; compared with existing magneto-rheological fluid clutches, it also has the characteristics of large transmission torque and low power consumption.

Description

Technical field: [0001] The invention relates to a clutch device, in particular to a device that uses magneto-rheological fluid to generate transmission torque. Background technique: [0002] Traditional clutches can be divided into: mechanical clutches, pneumatic clutches, hydraulic clutches, electromagnetic clutches, overrunning clutches, centrifugal clutches and safety clutches, etc. They often have the following disadvantages more or less: ① Slow speed of engagement or separation (that is, slow response), and impact; ② Loud noise and large inertia; ③ Serious friction, wear and heat, and short service life; ④ Inconvenient control . At present, with the emergence and development of new intelligent materials such as magnetorheological fluid, a brand new magnetorheological fluid clutch has appeared [see the US patent applied on December 8, 1998, patent number: US005,845,753A ]. Its main structure is: between the driving shaft and the driven shaft, a plurality of parallel ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D37/00F16D37/02
Inventor 张先舟王琪民张培强郑春阳
Owner UNIV OF SCI & TECH OF CHINA