C-flex flexural pivot - 图文

由微航动力翻译

TECHNICAL DATA

Frictionless Bearings ? No Lubrication ? Low Hysteresis

? Easy Installation ? Custom Design

THE BEARING SOLUTION

CONSIDERATIONS FOR THE ENGINEER

Torsional Spring Rate/Load Capacity扭转刚度/载荷The torsional spring rate and load capacity of C-Flex bearings is dependent upon length, width, and thickness of the internal flat spring beams. High angles of rotation require thin springs to reduce bending stress and thereby result in low torsional spring rates and correspondingly small load capacities. Bearings with thin spring beams, such as the C-Flex Series 10 bearings, typically allow for rotation angles of up to +/- 15 degrees for indefinite life with light loads. In comparison, series 20 bearings which have a heavier spring and can accommodate

heavier loads, are rated for rotation angles of +/- 7.5 degrees at zero load for indefinite life while the series 30, which are heavier still, are rated for +/- 3.7 degrees.

Geometric Centershift中心轴漂移设计过程中请务必考虑这个因素引起的问题The rotation of the bearing sleeve segments is facilitated by bending of the flat spring beams which support them. This causes a slight radial shift of the sleeve segments relative to each other. For small angles of rotation, such as 2 degrees, the shift of geometric center of the rotated member will be minimal on the order of .02% of the bearing diameter, however increases to approximately 1% of the bearing diameter at a rotation of 15 degrees.

Cycle Life寿命The cycle life of C-Flex bearings is based upon the fatigue limit of the materials utilized for the spring beams. Bending and load stresses are considered in determining performance ratings which will statistically result in an infinite cycle life.

The flexure design is suitable for a variety of materials such as stainless steels of the martinistic or precipitation hardening variety: inconel, hastelloy, and beryllium copper among others.

Linearity and Hysteresis线性和迟滞性The linearity of the C-Flex bearing, measured as the rotational deflection of the pivot vs. the torque required to induce this deflection, is relatively constant for angles of rotation up to 15 degrees. Hysteresis in the C-Flex bearing is defined as the difference of null positions when the flexure is deflected to a plus angle and then relieved, and then deflected to a negative angle and then relieved. The null position after the plus direction compared with the null position after the minus deflection is the angle of hysteresis.For additional questions/comments, please do not hesitate to contact us.

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C-FLEX BEARING CENTERSHIFT中心轴漂移由微航动力翻译GEOMETRIC CENTERSHIFT VS. ANGULAR DEFLECTION 几何中心轴漂移角度的改变备注：随着轴承转角的变化，轴承的中心轴也会跟着改变(AS A % OF BRG. DIA.)

GEOMETRIC CENTERSHIFT

ANGULAR DEFLECTION (Degrees)

Frictionless Bearings ? No Lubrication ? Low Hysteresis

? Easy Installation ? Custom Design

THE BEARING SOLUTION

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径向刚度和轴向刚度C-FLEX BEARINGS Radial and Axial Stiffness Properties

Note: Unless indicated, all values under load capacity apply to Cantilever BearingsLc = Load in compression

载荷单位：磅Lt = Load in tension

BEARING

SERIES

A SERIES1020300.958.9025.303.8012.7025.306.0812.7025.300.000500.000250.000170.001000.000500.00025由微航动力翻译

径向刚度RADIAL STIFFNESS*

Lt

刚度单位：磅/英寸LOAD CAPACITY

Lc

Lt

轴向载荷AxialLc

轴向刚度Axial Stiffness

0.000500.000300.00030B SERIES1020301.4013.7039.305.6019.6039.308.9619.6039.300.000330.000170.000130.000500.000250.000170.000300.000200.00013C SERIES1020302.0019.5055.807.8027.9055.8012.4827.9055.800.000250.000140.000090.000330.000170.000110.000250.000130.00008D SERIES1020303.6035.00100.0014.2050.00100.0022.7250.00100.000.000220.000100.000060.000200.000110.000080.000140.000080.00005E SERIES1020305.7055.00157.1022.8078.60157.1036.4878.60157.100.000140.000080000050.000140.000080.000060.000100.000060.00004F SERIES1020308.4079.10226.0033.60113.00226.0053.76113.00226.000.000130.000070.000050.000080.000060.000030.000100.000060.00004G SERIES10203014.40140.00400.0057.40200.00400.0091.84200.00400.000.000100.000050.000030.000060.000030.000020.000080.000050.00003H SERIES10203023.00221.10631.5092.00315.80631.50147.20315.80631.500.000080.000040.000030.000050.000020.000020.000060.000030.00002I SERIES10203032.40317.20906.10129.40453.10906.10207.40453.10906.100.000060.000030.000020.000040.000020.000010.000050.000030.00002J SERIES10203059.20566.301616.00236.60809.001616.00378.88809.001616.000.000050.000020.000010.000030.000010.000010.000040.000020.00001刚度单位：磅/英寸1. Stiffness of bearing is rated in inches of deflection per pound of load. 2. *This data applies to standard cantilever bearings loaded at the mid-point of the unsupported half, at 0 degrees rotation.3. *The total stiffness of a pair of tandem mounted cantilevered bearings connected very stiffly in a mechanical system may be determined by dividing the above values by three.

4. *For double ended bearings of the same sizes and types as above, divide the above radial stiffness values by two.

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由微航动力翻译Hysteresis Curve Type 10 Bearing10系列轴承迟滞曲线Hysteresis in C-Flex bearings is defined as the difference of null positions when the bearing is deflected to a plus angle and then relieved, and then deflected to an equal minus angle and then relieved. The null position after the plus deflection compared with the null position after the minus deflection is the angle of hysteresis.

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