Centralized lubrication

Change-over mechanism for pressure head shifting device, swivelling device, multiple turret Column speed control Lifting and lowering device, travelhng gear Automatic lubrication device central lubrication system Electrical section drive motors, electrical control, software for preventative maintenance... 

Uses and applications packaging, monofilament fishing line, tubes for central lubrication systems, fuel and oil pipes, pneumatic and hydraulic control lines, and Bowden cables. 

In each case, the slider running surfaces have to be hardened and provided with a lubricant. With siiders that are complex and difficult to access, it is recommended to install self-lubricating elements or a central lubrication system. To blow out residual resin residues after every compression process, it is recommended to install air channels to prevent the slider from sticking. 

Fig. 4—Film thickness in the central contact region [18]. The ball is 23.5 mm in diameter and the lubricant is mineral oil CN13604 with no additives. Temperature is 25 C and load 4 N. The film thickness in Curve b is the data of the total thickness (Curve a) minus the static film thickness. The data of Curve c is calculated from Hamrock-Dowson formula (1981).

The isoviscosity of the lubricant close to the solid surface in TFL is much different from that of bulk fluid, which has been discussed by Gao and Spikes [47] and Shen et al. [48]. For the homogeneous fluids, Eq (4) predicts the elastohydrody-namic central film thickness by a power relationship of about 0.67 with velocity and viscosity, i.e.. 

The shapes of film thickness along A—in Fig. 8 are given in Fig. 9. With the decrease of speed, the curve of film thickness in the central region becomes flat. The thickness of the film in a cross section of the central region is about 24 nm for the mineral oil with a viscosity of 36 mPa-s (20°C). However, for the lubricant with a viscosity of 17.4 mPa s as in Fig. 10, the curve is quite crooked when the average thickness is about 24 nm, and the curve becomes flat at a thickness of about 14 nm. These indicate that the thinner the film is, the flatter the film in the central region will be. The thickness at which the shape of the film curve becomes flat is related to the critical film thickness where EHL transfers to TFL. The thicker the critical film is, the thicker will be the average film at which the film curve turns flat. 

Fig. 9—Film thickness in the central cross section [2]. Lubricant mineral oil with viscosity of 36 mPa s at 20°C, Temperature 25°C, Diameter of ball 20 mm. Load 6.05 N.

Figure 20 shows the film shape and the pressure distribution in the moving direction, taken from the section at the central line of the contact regime. The atmosphere viscosity of the lubricant is 0.062 Pa-s. Figure 20 tells us that the film shape and the pressure distribution are both in the forms similar to... 

When the plane moves at 0.1 mm/s and under a normal load of 38.29 N, the numerical mixed lubrication model yields the solutions of film thickness and pressure distribution shown in Fig. 11 where the profiles are taken along the central lines in the x and y directions, respectively. Corresponding results from dry contact analyses are given in the same hgure for comparison. Excellent agreements observed... 

Fig. 12—Comparison between low-speed mixed lubrication and dry contact transverse waviness. (Profiles are taken alone the central lines in x and y directions.) (a) Pressure and film thickness profiles along the x direction at y=0. (b) Pressure and film thickness profiles along the y direction at x=0.

Christian Schneider Chief of the central personnel department, in charge of labor at Farben plants. Chief of Productive Division No. 1 (Sparte I), which made nitrogen, gasoline, diesel and lubricating oils, methanol, and organic chemicals. 

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