CS273833B1 - Lubricant for machine parts with limited running-down - Google Patents

Abstract

The lubricant is used particularly for lubricating open transmissions with roughly worn gearing, steel cable and chains. The lubricant consists of 40 to 60 % by weight dark oil with viscosity at 50 degrees C of 150 to 170 mm<2>/s and hardening point of maximum -10 degrees C, 8 to 17 % by weight technical oil with drop point of minimally 32 degrees C and 2 to 3 % by weight molybdenum sulphide with purity of a maximum of 96 % by weight, the content of particles up to 5 μm is at least 40 % by weight and the content of particles above 20 μm is at maximum 30 % by weight. A mixture of petroleum asphalt and bentonite is used as a reinforcing component in a ratio of 1 : 1 and in a quantity of 30 to 40 % by weight. The petroleum asphalt has a softening point of k.k. 81 to 90 degrees C, breaking point of at maximum -18 degrees C and penetration at 25 degrees C of 30 to 40 mm<-1>. Bentonite has a grain size of less than 0.315 mm and humidity of 7 to 12 % by weight.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to lubricants of machine parts with limited flowability, in particular to open gears with roughly machined teeth, steel ropes and chains.

Lubricants, such as high-viscosity lubricating oils, which run down on vertical or inclined friction surfaces at operating temperatures, are used to lubricate open gears, wire ropes and chains. In addition, high consistency lubricants are used for these purposes, which peel off from the functional surfaces at working temperatures. Medium consistency greases are also used, which are pushed out of the functional surfaces under operating loads.

These properties of the lubricants used result in increased wear of the lubricating parts, increased lubricant consumption and increased lubrication time. Running lubricants also pollute work areas, impair work safety and the environment.

The above-mentioned drawbacks are eliminated by lubricant of machine parts with limited run-off! based on dark oil, tallow, petroleum bitumen, bentonite and molybdenum disulphide according to the invention, consisting essentially of 40 to 60 JS by weight of dark oil with a viscosity of 150 to 170 mm ² / s at 50 ° C and a pour point of maximum -10 ° C, B to 17% by weight of technical tallow with a dropping point of at least 32 ° C and 2 to 3% by weight of molybdenum disulphide having a purity of not more than 96% by weight, a particle content of up to 5 As a reinforcing component of the lubricant, a mixture of petroleum asphalt and bentonite in a ratio of 1: 1 and in an amount of 30 to 40% by weight is used, the properties of petroleum asphalt being characterized by a softening point at 81 to 90 ° C, 18 ° C and a penetration at 25 ° C of 30 to 40 mm ^-1 , bentonite properties with a grain size of less than 0.315 mm and a moisture content of 7 to 12% by volume.

Grease of machine parts with limited drainage! according to the invention, it is characterized by an increased lubricating film load capacity, improved adhesion, increased water resistance and improved ability to compensate for surface irregularities. These properties, in comparison with current lubricants, make it possible to reduce the adhesive wear of the friction surfaces, eg tooth flanks, chains, ropes and pulleys. It further reduces the occurrence and effect of shocks during start-up and reverse running of toothed and sprockets, which have an adverse effect on the technical condition of the drives and steel structure of the device. The application of the lubricant of the machine parts according to the invention results in a longer operation of the lubricated parts and the whole drives.

The lubricity and adhesion of the lubricant are influenced by the choice of the ratio of the individual components. In the first stage of the lubricant preparation, half the dark oil charge with all of the petroleum bitumen is heated to 120-130 ° C with stirring. After complete dissolution, the other half of the dark oil is added and technical tallow, bentonite and molybdenum disulphide are mixed in portions at 80 ° C. The mixture is heated to 105 ° C until free moisture has evaporated. It is then cooled to 00 ° C and spun into transport containers.

The lubricant of machine parts with limited drainage is described in the examples.

Example 1

The following lubricant was prepared:

dark oil 0016 (ČSN 65 6660) 50% by weight technical tallow 16% by weight bentonite (ČSN 72 1350) 16% by weight

CS 273833 B1 petroleum bitumen (ČSN 65 7201) 16% by weight molybdenum disulphide (PND 50-517-79) 2% by weight

The following properties were found to be viscosity at 50 ° C wavelength at 100 ° G according to ON 65 6661: 1250 mm ² / s 00 mm / 0 point of ignition 305 [deg.] C freezing point 2 ° C density at 20 ° C 974 kg / m ³ ash content max 16% breaking point min. -15 ° C value of the CCP 224/251 kp hour test at hour load 000 N: abrasion diameter 1,470 mm

The grease was used for lubrication of steel ropes of large-scale mining machines.

Example 2

The following lubricant was prepared: dark oil 0D16 (ČSN 65 6660) technical tallow bentonite (ČSN 72 1350) petroleum bitumen (ČSN 65 7201) molybdenum disulphide (PND 50-517-79)

The following properties were found according to ON 65 6661 viscosity at 50 ° C viscosity at 100 ° C flash point pour point density at 20 ° C ash content drop point reaction of water jet CKS value hour test at constant load

52.5% by weight

10.5% by weight

17.5% by weight 17.5% by weight

2.0% by weight

680 mm ² / s 162 mm ² / s 295 ° C + 3 ° C 975 kg / m ³ max. 18% min. 15 ° C neutral 282/316 kp

800 N: Abrasion diameter 1.158 mm

The lubricant was used to lubricate the open gears of large machines in surface quarries.

Claims (1)

Dark oil, technical tallow, petroleum bitumen, bentonite and molybdenum disulphide based lubricant for machine parts with limited flowability, characterized in that it consists of 40 to 60% by weight of dark oil with a viscosity of 150 to 170 mm ² // s at 50 ° C a pour point of not more than -10 ° C, 8 to 17% by weight of technical tallow with a dropping point of at least 32 ° C and 2 to 3% by weight of molybdenum disulphide having a purity of not more than 96% by weight; above 20 (Um ma3 CS 273833 B1 x 30% by weight, the reinforcing component of the lubricant is a 1: 1 mixture of petroleum asphalt and an amount of 30 to 40% by weight, the petroleum asphalt having a k.k. 81 to 90 ° C, a breaking point of -18 ° C maximum and a penetration at 25 ° C of 30 to bentonite has a grain size of less than 0.315 mm and a moisture content of 7 to 12% by volume.