SU1208072A1 - Working fluid for hydraulic systems of powered supports - Google Patents

Description

one

The invention relates to the mining industry and can be used in hydraulic systems of powered roof supports in mines located in the permafrost region.

The purpose of the invention is to increase the bearing capacity of hydraulic posts of mechanized supports at low temperatures,

The working fluid is prepared as follows.

The water is heated to AOTZO C, ethylene glycol is added and both components are thoroughly mixed. Then, the emulsol VNIINP-117, polyethylsiloxane GKZh-94 polyethylene and a mixture of methyl benzene sulphates are successively added to the resulting solution under continuous vigorous stirring (200 rpm). Final mixing is carried out for 20 minutes. After that, the liquid is ready for use. It is poured into the tank of the oil station and then supplied by hydraulic pump through the pressure pipeline to the hydraulically supported hydraulic supports, while the pump temperature rises to 35–40 ° C. After the pactiopa hydro rack, the working fluid in them starts to cool to a temperature approximately equal to air in the lava, which under conditions of permafrost averages from -2.5 to -5.0 ° C,

VNIINP-117 emulsol is a light extract from purification of transformer oil (77.4 wt.%, To which is added, wt,%; captax 0.5; chromium stearate 0.1; potassium naphthenate 15.0; sodium sulfonate 6, 0, Emulsol is a stabilizer of the working fluid,

Polyethylsiloxane fluid (water repellent GKZH-94; produced according to VTUU 124-60) inhibits the interaction of fluid with the pipeline and seals of the hydraulic system, reducing their wear,

For the preparation of the working fluid, benzenesulfone-α and K-methyl-L, N-diethylauinomethyl are also used.

five

208072

derivatives of polyethylene glycol ethers of alkylphenols (a mixture of methylbenzenesulfonates), which are obtained by the interaction of diethylamine, methanol and paraformaldehyde. The product obtained is dispersed and the isolated dried amino ether is condensed with polyethylene glycol ether, alkylphenols and then condensed with methyl ether benzene sulfonic acid,

The resulting product is a quaternary salt of diethylaminomethyl polyglycol ether mono- and dialkylphenols (GOST 9600-78),

ten

15

 -, O- (CH2CHiO) nCH-N-C2H5 CH,

isol

where n 10-12; R, C

mr, 10 -Zl

five

0

five

R, R or R, H,

This salt levels the thermophysical properties of the complex colloidal system by reducing the thermal expansion coefficient Q. The use of an equalizer helps to reduce the loss of resistance and subsidence of the girder during cooling of the working fluid to negative temperatures.

The compositions of the proposed working fluid are given in table. 1,

The test results proposed and known, representing a 2% emulsol, the composition of the working fluid are given in table 2,

As follows from the data presented in Table 2, the proposed working fluid in comparison with the known fluid provides 2.5 times less drawdown of hydraulic legs and pressure losses in the system when it is cooled; does not freeze until, the seal material after a long stay in the proposed working fluid has, compared to the known (by 30%) higher relative limit deformation, m, e, povppennoy chemical resistance.

Editor A. Ogar

Compiled by G.Tsukanova Tehred A.Ach.

Order 179/34 Circulation 483 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., d. A / 5

Branch PPP Patent, Uzhgorod, st. Project, 4

1208072

Table 1

table 2

Proofreader S. Shekmar

Claims (1)

WORKING LIQUID FOR HYDRAULIC SYSTEMS OF MECHANIZED FASTENERS, containing water and oil-based emulsol based on petroleum oil, characterized in that, in order to increase the load-bearing capacity of the hydraulic supports of mechanized supports, at low temperatures, the liquid additionally contains ethylene glycol, polyethylsiloxane liquid and beneolsulfonates Ν , N-diethylaminomethyl derivatives of polyethylene glycol ethers of alkyl phenols in the following ratio of components, wt.%: Ethylene glycol Petroleum-based Emulsol Polyethylsiloxane Liquid Beneolsulfonates of N-methyl-N, N-diethylaminomethyl derivatives of polyethylene glycol ethers of alkyl phenols Water 17-22 1.5-2.5 1.5-3.0 0.5-1.0 Else FROM SU „., 1208072