One-piece bearing

Abstract

The invention belongs to aero-engine fuel control systems and provides an integrated bearing. The upper portion of a rectangle is a high-pressure plane 2, and the lower portion of the rectangle is a low-pressure plane 1. The two ends of the bearing are two semicircular outer bearing circular arcs 6. Two stepped holes 7 are symmetrically formed in the middle of the bearing left and right. The left-side stepped hole 7 and the left-end outer bearing circular arc 6 are concentric, and the right-side stepped hole 7 and the right-end outer bearing circular arc 6 are concentric. A concentric inner bearing hole 5 is formed in each stepped hole 7. A lubricating oil groove 4 is formed in the obliquely upward direction of the part, facing the outer side of the corresponding internal inner bearing hole 5, of each stepped hole 7. An upper special-shaped unloading groove 3a and a lower special-shaped unloading groove 3b are formed between the two stepped holes 7. The lower portion of the lower special-shaped unloading groove 3b communicates with the low-pressure plane 1, and the upper portion of the lower special-shaped unloading groove 3b communicates with the two stepped holes 7.

Description

technical field [0001] The invention belongs to an aircraft engine fuel control system. Background technique [0002] At present, the fuel control system of aircraft engines is generally inseparable from the gear pump. As an important part of the fuel control system, the gear pump has the advantages of small size, light weight, simple structure, easy manufacture, low sensitivity to the cleanliness of the working fluid, and reliable operation. advantage. In order to make the gear pump work normally, there are also certain requirements for the gear pump bearings. Generally, the main materials of gear pump bearings are aluminum alloys and copper alloys. At the same time, coating technology is used to improve the wear resistance of bearings. [0003] At present, with the development of engine technology, the requirements for fuel control systems are also increasing. For example, in order to meet the weight reduction requirements, it is necessary to consider using lighter mater...

AI Technical Summary

Problems solved by technology

[0003] At present, with the development of engine technology, the requirements for fuel control systems are also increasing. For example, in order to meet the weight reduction requirements, it is necessary to consider using lighter materials to manufacture bearings. The traditional gear pump bearings are split and 8-shaped. Made of copper alloy, the weight is heavy, and the self-lubricating effect is not satisfactory. Although the aluminum alloy bearing is light in weight, it is not suitable for large-size gear pumps, so the relevant design needs to be improved.

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