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Technical Brief

Analysis of the Static Characteristics of a Self-Compensation Hydrostatic Spherical Hinge

[+] Author and Article Information
Chundong Xu

School of Mechanical Engineering,
Southeast University,
Nanjing 210096, China

Shuyun Jiang

School of Mechanical Engineering,
Southeast University,
2 Southeast Road, Jiangning District,
Nanjing 211189, China
e-mail: jiangshy@seu.edu.cn

1Corresponding author.

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received December 31, 2014; final manuscript received April 29, 2015; published online July 9, 2015. Assoc. Editor: Daniel Nélias.

J. Tribol 137(4), 044503 (Oct 01, 2015) (5 pages) Paper No: TRIB-14-1318; doi: 10.1115/1.4030712 History: Received December 31, 2014; Revised April 29, 2015; Online July 09, 2015

This technical brief presents a new self-compensation hydrostatic spherical hinge to provide a large load capacity. The hinge consists of an upper part with self-compensation and a lower part with orifice restrictors. A comparative study of the static behavior is conducted between the self-compensation hydrostatic spherical hinge and the hydrostatic spherical hinge with orifice restrictors, the result shows that the self-compensation hydrostatic spherical hinge has an advantage in the static behavior over the hydrostatic spherical hinge with orifice restrictors, including a much larger load capacity, a smaller flow rate, and a smaller power loss.

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Figures

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Fig. 3

The hydrostatic spherical hinge under the spherical coordinate. θ1, θ2—angles of both edges of the upper oil recess, θ3, θ4—angles of both edges of the lower oil recess, d1—diameter of the upper oil outlet, and d2—diameter of the oil outlet.

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Fig. 2

Structure of the hydrostatic spherical hinge. 1—connecting rod, 2—upper ball socket, 3—ball head, 4—lower ball socket, 5—orifice restrictors, 6—oil outlets, 7—oil-returning slot, 8—oil inlet, 9—holes, 10—upper oil outlet, 11—upper oil recess, 12—self-compensation hole, 13—tunnel, 14—lower film land, and 15—lower oil recess.

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Fig. 1

Schematic of the slider–crank mechanism of gear shaper machine

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Fig. 4

Structure of the hydrostatic spherical hinge with orifice restrictors [1]. 1—connecting rod, 2—upper oil outlet, 3—orifice restrictor, 4—oil outlets, 5—oil-returning slot, 6—lower oil recess, 7—hole for mounting the restrictor, 8—ball head, 9—lower part of ball socket, 10—upper part of ball socket, 11—upper oil recess, 12—oil inlet, 13—lower film land, and 14, 15—upper film land.

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Fig. 5

Comparison of the static characteristics: (a) load capacity, (b) flow rate, and (c) power loss

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