Thickness automatically-compensating device for multi-oil-chamber static pressure oil film, and system thereof

Abstract

The invention discloses a thickness automatically-compensating device for a multi-oil-chamber static pressure oil film, and system thereof, wherein the device is composed of a cylinder, and a piston which can move up and down in the cylinder and which is not separated from the cylinder by action of hydraulic oil, wherein an inner cavity which has an opening on the top and depth greater or equal to height of the piston is arranged in the cylinder, and the piston is arranged in the inner cavity; the cylinder is provided with a hydraulic oil supply channel of a closed space formed by communicating the inner cavity or communicating the piston with the inner cavity; a side wall of the cylinder is provided with a static pressure oil supply port; a top surface of the piston is provided with at least one oil chamber closed on a circumference; and a static pressure oil supply channel for communicating the oil chamber with the static pressure oil supply port is arranged in the piston. The piston can axially move up and down and can be not separated from the cylinder by common action of hydraulic oil and static pressure oil to automatically compensate thickness of oil-chamber oil films, thereby ensuring thickness of the multi-oil-chamber oil film is consistent, and loads are distributed uniformly.

Description

technical field [0001] The invention relates to static pressure oil film technology, in particular to an automatic compensation device and system for multi-oil chamber static pressure oil film thickness. Background technique [0002] Hydrostatic pressure technology is to inject pressure oil between two planes or curved surfaces that can move relatively, so that an oil film is formed between the two planes or curved surfaces to separate them. During the working process, the pressure of the oil film changes with the external load. Under different working conditions , can ensure that the flat or curved surfaces work under the state of liquid friction. At present, static pressure technology is widely used in guide rails, bearings and other fields. [0003] The establishment of a hydrostatic oil film is very important in hydrostatic technology. The thickness of the oil film is directly related to the size of the liquid resistance at the oil sealing edge, and indirectly affects t...

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Problems solved by technology

[0004] In conventional multi-chamber hydrostatic systems, such as figure 1 As shown, the system consists of a pair of relatively moving workpieces. The workpiece used for bearing is called a fixed part 1, and the workpiece used for applying a load is called a rigid load 2. An oil supply channel 11 is provided inside the fixed part 1. A plurality of oil chambers 12 communicated with the oil supply channel 11 are excavated on the top surface of the piece 1. The surrounding walls of the oil chamber 12 are closed to seal a certain amount of hydrostatic oil. The top surface of the fixing piece 1 is in contact with the rigid load 2. Hydrostatic oil is introduced into the oil channel 11 to form an oil film between the rigid load 2 and the top surface of the fixed part 1. The top surface of the fixed part 1 and the bottom surface of the rigid load 2 are the contact surfaces of the hydrostatic oil, and the thickness of the oil film in multiple oil chambers The consistency of the hydrostatic oil contact surface is affected by many factors such as machining accuracy, assembly error, and service conditions. In order to ensure the thickness of the oil film h 1 and oil film thickness h 2 The consistency of processing, assembly, use and wear is often required to be very small, even reaching the micron level, which puts forward higher requirements for processing accuracy, assembly accuracy, and use conditions, which makes processing difficult and production efficiency low. , high cost, short maintenance cycle, high maintenance cost and short service life

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