DE1284011B - Lubricant for open gear drives - Google Patents

Description

The invention relates to Sehmiermittel, the flash point (Pensky-.

is particularly suitable for use on large, closed Martens

slowly moving parts of heavy machinery crucible) 65.6 ⁰ C minimum

which do not contain a built-in lubrication system,

z. B. for the lubrication of sprocket drives, crane distillation:

digging dredging, gears on cranes, bucket elevators. Transitioned to 240 ° C 45 volume percent minimum

and similar machines. Passed to 300 ⁰ C 75 volume percent minimum

The claimed lubricants consist of sediment after 2 hours at 15 ° C: nonexistent.

Petroleum bitumen with a penetration of 200 to (Note: The phenols determined in the test are 350 mm / 10 (IP 49), preferably from 280 to 320 mm / 10 io mostly monohydroxyphenols.) at 25 ° C, in which the following components are dissolved:

0.5 to 5.0, preferably 1.5 to 2.5, weight wool fat percent Creosot,

1.0 to 15, preferably 1.5 to 5, percent by weight saponification value 120 mg KOH / g

Wool fat and 15 iodine number 38

1.0 to 7.5, preferably 2 to 5, percent by weight Unsaponifiables 41 percent by weight

microcrystalline petroleum wax. Melting point 37 ° C

(All percentages are based on the sum of bitumen + Creosot + wool fat + wax.) Microcrystalline petroleum wax

For easier application of the lubricant is 20

this preferably dissolved in a solvent. The melting point 86.7 ° C (IP 76)

Solvent must be so volatile that at least a penetration 6 mm / 10 at 25 ⁰ C (IP 49)

considerable part evaporates after application. For Lubricant A was prepared by adding the

Coal tar bitumen, creosot, wool grease and wax are suitable for brushing on with a brush

Heavy gasoline as a solvent. For use as 25 ^{were heated together to 100 0} C until a

Aerosol are z. B. methylene chloride and mixtures forms a homogeneous solution. This solution was based on

^{80 0} C cooled by methylene chloride and coal tar heavy gasoline, whereupon the heavy gasoline was added

preferred. became. The finished mixture was stirred up

Under Creosot, a coal tar fraction is cooled to a room temperature. Loss of heavy gasoline with an initial boiling point of around 200 ° C and an end of boiling 30 due to evaporation were added to mean at least around 325 ° C. Creosot ent- The lubricant A was tested in that one holds aromatic hydrocarbons and certain specific amounts by weight on two perpendicular, mutually compatible amounts of tar acids and bases. Wool grease was applied to the gripping gears, of which the product obtained by acid treatment of the washing water generated by an electric motor when the wool was removed was greased 35 During a wet adhesion test, the lower one was immersed. Coal tar heavy gasoline is a coal tar part of both gears in a water bath. The smear fraction that transitions to 90 ° / ₀ below about 190 ° C. Microdeans were tested for durability of the lubricating pad, crystalline petroleum wax is a wax that is obtained from weight loss and wet adhesion in the manner described below obtained from vacuum distillation of crude oil.

turns 40

Durability of the lubrication pad

The two gears were m one electric

According to the invention lubricant A consists of a connected circuit that measures the electrical 80 percent by weight bitumen of a penetration resistance between the two gears

of 300 mm / 10 at 25 ° C (IP 49) ^{45 m} ° g ^ucnte · ^While maintaining the lubrication was

13 percent by weight coal tar heavy fuel, f ¹ lubricating pad between the gears

2.0 percent by weight Creosot, ^de ° '? ° ^dal J ^de / ^ ^lde ^ ^{and unendüch} * ^ar · B « ^voU :

2.5 percent by weight of wool fat, x _T ^a Ä ^em ^ ^{UsMI der S} ? ^hl ™ strength ^was the resistance

2.5 weight percent of microcrystalline petroleum wax ^{Nul1: B "d} ^ ^brush interruption in the lubricating film

50 became the resistance while rotating the

This mixture had occasionally less penetration (uncalculated) wheels. This resulted in a of 425 mm / 10 at 25 ° C (IP 167). Electric meter flutter. The cons

The components of lubricant A were measured at one hour intervals, the following indicators: The first sign of a flutter on the measuring instrument

55 was used as the point in time to determine the permanent heavy gasoline of the lubrication pad.

Specific gravity 0.8652 wet adhesion

Abel Flash Point The lubricant was applied to wet teeth

(closed) 44 ° C 60 applied, whereupon the gear transmission is

Distillation: 5% 16O ⁰ C was allowed to run. The percentage of

90 ° / ₀ 19O ⁰ C surface of the teeth, which after this test is still with

was covered by the lubricant.

Creosot.

g weight loss

Commercially available product with the following key figures: _{The weight loss was determined) by}

Water 1 percent by volume maximum of the material that was used during the first 12 hours of the

Phenols 15 percent by volume was thrown down at the maximum running time of the transmission,

picked up and weighed. The result is expressed as a percentage of the lubricant originally applied expressed.

The same tests were carried out on two known, commercially available lubricants. The well-known lubricant X was a mixture of 50% bitumen and 50 ° / ₀ of mineral oil. The known lubricant Y was a mixture which contained bitumen and phenolic components, but no wool fat or microcrystalline petroleum wax.

durability
the lubrication pad,
hours Weight
loss, covered area in% 104 +
86
87 0.07
0.04
0.04 100
100 9
25th
20th 0.13
0.51
0.37 30th
10
20th 39
42
34 0.01
0.02
0.02 100
100
100

Lubricant A
Lubricant A
Lubricant A

Lubricant X
Lubricant X
Lubricant X

Lubricant Y
Lubricant Y
Lubricant Y

Note: 104+ means that the test will be completed after 104 hours (before an interruption in the Film) was canceled.

An aerosol pack was made with lubricant A. This pack contained:

Lubricant A 50 percent by weight

Methylene chloride 20 percent by weight

Difluorodichloromethane 30 percent by weight

It was found that the mixture applied well to the gears with this composition. Compared to application with a brush, the aerosol form has the advantage of being quick and easy Application.

(The abbreviation »IP« with a number denotes the number of the test methods used in »Standard Methods for Testing Petroleum and its Products ", published by the British Institute of Petroleum, be are written.)

Claims (2)

Patent claims: 1. Lubricant for open gear drives, consisting of petroleum bitumen with a penetration from 200 to 350 mm / 10 at 25 ° C, 0.5 to 5.0 percent by weight Creosot, 1.0 to 15 percent by weight Wool fat, 1.0 to 7.5 percent by weight of microcrystalline petroleum wax - each based on the Total - and optionally volatile solvents. 2. Lubricant according to claim 1, consisting of petroleum bitumen with a penetration of 280 up to 320 mm / 10 at 25 ° C, 1.5 to 2.5 percent by weight Creosot, 1.5 to 5 percent by weight wool fat and 2 to 5 weight percent microcrystalline petroleum wax.