SU1586747A1 - Method of producing filter element for purifying fuel - Google Patents

Abstract

The invention relates to methods for producing filter elements for cleaning fuel, preferably in internal combustion engines, and allows an increase in the service life of the filter element. In the method of manufacturing a filtering element for cleaning fuel from titanium powder, including its molding and sintering, after sintering, the filtering element with a pore size of 100-200 µm is impregnated with a solution of one of the copper compounds and dried to a constant mass.

Description

The invention relates to process equipment and is intended for the purification of fuel primarily in internal combustion engines.

The aim of the invention is to increase the service life of the filter element.

The filter element is made as follows.

The titanium powder is molded into blanks with a porosity of 45-50% and is sintered in a furnace at 1000-1OOO С in a protective atmosphere. Sintered filter elements are impregnated in vacuum with a solution containing one of the soluble copper compounds with a concentration of 10–20%, and then dried at a temperature above 100 ° C to a constant mass. After drying, the product is washed in a solution of gasoline.

Example 1. Titanium powder with a particle size of 180-450 microns is mixed with 10% paraffin and 2% zinc stearate. From the resulting mixture, press the billet in the form of a glass with an area of 20 cm and porosity (46 ± 2)%, which is sintered in argon at (J050 + .20) C. The resulting porous element having an average pore size of 80 μm and providing the degree of fuel cleaning 95%, yrop1: melted with an aqueous solution of copper sulfate CuS04 5H20 with a concentration of 5%, and then dried at. (120ilO) ° C to constant mass.

The permeability coefficient according to GOST of the porous element is 6.4)

12. 2.

MO m, Filter elements are installed in the fuel system of a VAZ car. After 10,000 km, the element permeability coefficient

cl

oh

.four;

| is 3.4 m, t, e, 53% of the original I,

 Example2. From titanium powder | with particle sizes of 200-450 μm according to Example 1, a filter element is made with an average pore size of 100 μm and a purification degree of 95%. The filter element is impregnated with a 10% aqueous solution of copper sulphate and dried to constant masses. The permeability coefficient before installation in the car is 7, m. After 10,000 km, the permeability coefficient is 5,110, i.e. 70% of the original.

PRI me R 3. From a titanium powder of a fraction of 315-500 μm with 8% paraffin jnpeccyioT, the preform is porosity (50i2)% and is sintered at (Poo + 20) ° C. A porous element with an average pore size of 150 μm and a purification degree of 92% is impregnated with an aqueous solution of copper sulphate with a concentration of 15% and dried to a constant mass. The permeability coefficient is 17.8 m2. After 10,000 km: Permeability coefficient - .5.9

 - 17 2

0 m, i.e. 76% of the original

PRI me R 4. From titanium powder fraction 450-800 microns by. Example 3 is made of a filter element with an average pore size of 200 µm and a degree of purification of 90%. The filter element is impregnated; an aqueous solution of sulfuric acid. {copper with a concentration of 20% and dried to constant weight. The permeability coefficient is 9; After 10,000 km of run, the coefficient

g

those.

permeability - 7.5-10 79% of the original.

PRI me R 5. From the titanium powder fraction of 500-800 μm, according to Example 3, the Filter Element is made from medium. pore size of 220 microns and the degree of purification of 80%. The filter element is impregnated with an aqueous solution of copper sulphate at a concentration of 25% and dried to constant weight. Coefficient

permeability is JO-IO after 10,000km - 8.3 10. m, i.e. 83% of the original.

PRI me R 6. Filter elements made as indicated (Examples 1-5) were impregnated in a vacuum of 100 Pa with an aqueous solution of acetic copper (CuCCgH Oj). The initial permeability coefficients correspond to those obtained with impregnated

j o 5

0 5

Q

five

0

0

five

ke copper sulphate. Tests on the duration of the work carried out.

The filtering element 1 dp of fuel cleaning is made in the form of a cup of titanium sintered powder (waste of titanium production) with different. measures up to 100-200 microns. The pores are filled predominantly with a solution of copper sulfate (CuSO -5H20).

The average pore sizes of the filter element are 100-200 microns are optimal. If the average pore size is less than 100 microns, then after impregnation and drying, a significant part of the pores become clogged with particles of copper compounds and the filter resistance becomes more acceptable. If the average pore size is larger than .200 μm, the filter element does not provide the required fineness and degree of fuel cleaning.

After installing the fuel filter before the fuel pump of the vehicle, it works as follows:

The fuel, the passage through the pores of the filter element, washes away particles of a metal-plated compound (copper sulphate), which, together with the fuel, enters the engine cylinders. When fuel burns, the compound containing metaplans decomposes, and copper oxides in the resulting reducing medium turn into copper, which partially condenses on cold cylinder machines to form a solid lubricant between the piston ring and the cylinder wall. The space released in the pores of the filter element is replaced by foreign particles that contaminate the fuel, which increases the service life of the filter.

Claims (1)

The formula iso. Reteni, A method of manufacturing a filtering element for cleaning fuel from titanium powder, including its molding and sintering, which is different in that, in order to increase the service life of the filtering element, after sintering, the filtering element with a pore size of 100-200 µm is impregnated with a solution of one of the copper compounds and dried to constant mass.