Oil film supporting servo hydraulic cylinder
A servo hydraulic cylinder and oil film technology, applied in the field of servo hydraulic cylinders, can solve the problems of restricting dynamic response characteristics, poor dynamic response characteristics, unsuitable for high-speed operation, etc., and achieve the effect of improving dynamic response, good dynamic response and low friction.
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[0013] Example 1
[0014] A hydraulic cylinder with oil film supporting servo. The servo hydraulic cylinder such as figure 1 Shown: including cylinder 1, piston 2, piston rod 7, guide sleeve 4 and gland 6. The guide sleeve 4 passes through the piston rod 7 and is fixedly installed at the shoulder of the cylinder 1. A sealing ring 3 is installed on the left side of the guide sleeve 4 and the shoulder of the cylinder 1. The guide sleeve 4 and the piston rod 7 There are 3 to 5 balance grooves 9 at the contact point, and the rightmost balance groove 9 communicates with the second oil-repellent passage 11 through the first oil-repellent passage 10; the gland 6 presses the guide sleeve 4 and is fixed to the small part of the cylinder 1 At the cavity end, a U-shaped sealing ring 5 is provided on the right side of the guide sleeve 4 and the contact point with the piston rod 7.
[0015] Among them: the material of the guide sleeve 4 is bronze; the contact between the guide sleeve 4 and the...
Example Embodiment
[0016] Example 2
[0017] A hydraulic cylinder with oil film supporting servo. The structure of the servo hydraulic cylinder is as figure 1 As shown, there are 5-7 balance grooves 9 at the contact point between the guide sleeve 4 and the piston rod 7, and the gap between the guide sleeve 4 and the piston rod 7 is 15-25um; the groove width of the balance groove 9 is 0.8-1, The groove depth is 0.8-1mm, and the spacing of each balance groove 9 is 5-8mm.
[0018] The rest is the same as in Example 1.
[0019] This embodiment has the following characteristics:
[0020] 1. There are 3 to 7 balance grooves 9 in the inner circle of the guide sleeve 4, and the matching gap forms an oil film. The oil in the balance groove 9 not only acts radially on the piston rod 7, but also coincides with the center of the guide sleeve 4. , And is conducive to the movement of the piston rod 7 and the piston 2, and improves the dynamic response.
[0021] 2. The oil film support is adopted. The friction coe...
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