Main bearing sealing grease for heading equipment shield tunneling machine in tunnel engineering and preparation method of grease

Abstract

The invention relates to greases and in particular discloses a main bearing sealing grease for a heading equipment shield tunneling machine in tunnel engineering and a preparation method of the grease. The main bearing sealing grease for the heading equipment shield tunneling machine in tunnel engineering comprises the following components in parts by weight: 14-20 parts of base oil, 6-12 parts of degradable fiber, 11-20 parts of paste adhesive, 4-15 parts of a structural stabilizer, 25-30 parts of an oiliness agent and a friction modifier, 5-10 parts of a flame retardant and 3-8 parts of an antirust agent. The main bearing sealing grease has the beneficial effects that the main bearing sealing grease can completely replace imported products and is low in price; the grease does not block a pipeline or is not influenced by environment temperature, and a phenomenon that a rotating part of the shield tunneling machine is damaged when dregs enter a main bearing and a screw conveyer bearing of the shield tunneling machine can be effectively avoided; the main bearing sealing grease has super-high water washout resistance, is biodegradable and has high pumpability and low-temperature performance.

Description

(1) Technical field [0001] The invention relates to a grease, in particular to a sealing grease for the main bearing of a shield machine of tunneling equipment and a preparation method thereof. (2) Background technology [0002] Tunnel engineering excavation equipment-shield machine is mainly used in urban rail construction, highway and railway, municipal engineering, water conservancy engineering, river and sea tunnels, water (nuclear) power plant diversion projects and military confidential facilities and other fields. During the construction process of the shield machine, there are mud, rocks, sand, water, dregs and other dregs in the cutterhead soil bin, and there is still a certain pressure. In order to prevent mud, rocks, sand, water, dregs and other dregs from entering If the main bearing of the shield machine and the bearing of the screw conveyor cause damage to the rotating parts of the shield machine, the sealing grease for the main bearing of the shield machine mu...

AI Technical Summary

Problems solved by technology

Since the tunneling equipment shield machines are all imported from Europe, America, Japan and other countries in the early stage, and the seal grease of the main bearing of the shield machine is also monopolized by companies such as CONDAT, TOTAL, BASF in France and Matsumura in Japan, so the main bearing of the shield machine is used Sealing grease must rely on imports and is expensive

[0003] In recent years, domestic companies have also begun to research and develop the seal grease for the main bearing of the shield machine, but the products developed are not ideal in use, and may even damage the equipment. The performance is far from that of foreign products. The main problems are: (1) Unreasonable selection of raw materials will often block the pumping pipeline; (2) It is greatly affected by the ambient temperature, hardens at low temperature, and the pumping pressure is too high, which will cause the pipeline to rupture or fail to pump; when the temperature is high, the product consistency decreases, The outer seal of the cutter head bearing does not maintain pressure, so that mud, rocks, sand, water, muck and other dregs enter the main bearing of the cutter head and damage the equipment; (3) The product contains substances harmful to the rubber seal of the main bearing of the cutter head, which will cause Problems such as hardening, shrinkage and failure of the lip seal of the imported bearing of the shield machine