Geometrical calculation of gear links of planetary rotary hydraulic machine

2021 ◽  
Author(s):  
D. A. Kurasov
Keyword(s):  
Hydraulic Machine

Experimental confirmation of the possibility of using a hydraulic diode in the discharge line of a spur rotary pump

2020 ◽  
pp. 56-58
Author(s):  
S.Yu. Kaygorodov
Keyword(s):  
Experimental Confirmation ◽  
Rotary Pump ◽  
Indicator Diagram ◽  
Discharge Line ◽  
Hydraulic Machine

The operation of a spur rotary pump with different elements (valve, hydraulic diode, long and short pipelines) in the discharge line is investigated. Keywords hydraulic machine, spur rotary pump, hydrodiode, indicator diagram. [email protected]

The Hydraulic Operation of Lathes for the Production of Shells

1944 ◽  
Vol 151 (1) ◽  
pp. 70-86
Author(s):  
W. Littlejohn Philip
Keyword(s):  
Machine Tools ◽  
Hydraulic Power ◽  
The Third ◽  
Hydraulic Machine ◽  
Hydraulic Machinery ◽  
Simple Machines ◽  
High Level ◽  
Shell Production ◽  
Hydraulic Operation ◽  
Made In

The paper is limited to the application of hydraulic power to lathes designed for shell making although, in the author's opinion, there is an immense field for the application of the same principles in other directions. Self-contained hydraulic machine tools have been dealt with by Mr. H. C. Town,† but in the system to be described all the machines are operated from a central hydraulic plant. Three complete installations on this principle have been established by the author, and the present paper contains an account of this work from the first experiments in 1915 until about four years ago. The first plant was constructed in 1915 for the production of 3·29-inch shells, known as “18-pounders”, from the solid bar. The output was 2,000 shells per week of 135 hours, with girl operators working on three shifts. The second plant was put down in 1916–17 for an output of 500 9·2-inch howitzer shells per week of 135 hours, also with girls working on three shifts. The third plant is of recent design. It was started in 1938 for the production of 3·45-inch shells, known as “25-pounders”; and was laid out for an output of 1,000 shells per week of 47 hours. This plant included four types of hydraulic lathes which the author was engaged to design for the War Office. Soon after the commencement of the last war in 1914 it became evident that shell production would have to be greatly increased, and engineering firms were pressed to take up shell manufacture. The author, on behalf of his firm, undertook to help in the movement, and he at once set about the construction of some simple machines for the job. These conformed on general lines to the practice of the period as regards design and operation. He soon realized, however, that drastic changes would have to be made if production was to reach the high level that circumstances demanded. Although quite familiar with hydraulic machinery of various types and of many applications in presses and certain types of heavy tools, he was not aware of any instance in which hydraulic power had been applied to the movements of a lathe. It appeared to him, nevertheless, that it would be possible to construct a very useful machine on these lines, and he accordingly started immediately to carry out experiments and to prepare designs. It was considered essential that machines for the duty which the author had in mind should be much heavier and more rigid than the ordinary machines of the time, so that they should be free from vibration and “chatter” or spring with the heaviest possible cutting. The standard of rigidity aimed at was that which would permit a half-crown coin to remain balanced on edge on the moving saddle or turret while the tools were making the heaviest cuts. This object was achieved, and the demonstration was frequently made in the presence of those who came to see the lathes at work.

A coring device suitable for paleomagnetic sampling of unconsolidated subsurface deposits

1983 ◽  
Vol 20 (4) ◽  
pp. 845-848 ◽  
Author(s):  
René W. Barendregt ◽  
W. J. Vreeken
Keyword(s):  
Hydraulic Properties ◽  
Maximum Depth ◽  
Fine Grained ◽  
Hydraulic Machine ◽  
Geotechnical Investigations

Research in paleomagnetism requires the collection of continuous, undisturbed, and oriented cores from fine-grained sub-surface deposits. The authors have found the Giddings coring machine to be a suitable device which offers a rapid and accurate alternative to hand-cut sampling from natural outcrops. This hydraulic machine collects undisturbed and oriented cores to a maximum depth of 16 m. It has been widely used in the study of soil engineering and hydraulic properties as well as in other geotechnical investigations of fine-grained materials. Keywords: paleomagnetism, coring, oriented sampling.

scholarly journals A modified servo-hydraulic machine for testing at intermediate strain rates

2009 ◽  
Vol 36 (3) ◽  
pp. 460-467 ◽  
Author(s):  
Ramzi Othman ◽  
Pierrick Guégan ◽  
Georges Challita ◽  
Franck Pasco ◽  
Daniel LeBreton
Keyword(s):  
Strain Rates ◽  
Hydraulic Machine ◽  
Intermediate Strain Rates

Hydraulic machine with non-uniform cascade

2012 ◽  
Vol 15 (3) ◽  
pp. 032029
Author(s):  
M Haluza ◽  
F Pochylý ◽  
V Habán
Keyword(s):  
Hydraulic Machine

The Automatic Hydraulic Ram

1951 ◽  
Vol 165 (1) ◽  
pp. 53-73 ◽  
Author(s):  
J. Krol
Keyword(s):  
Drag Coefficient ◽  
Historical Development ◽  
Research Work ◽  
Water Hammer ◽  
Drive Pipe ◽  
Proper Understanding ◽  
Hydraulic Machine

After describing the operation of a typical hydraulic ram installation, the paper reviews the fundamentals of the water hammer as a prerequisite to the proper understanding of the limitations of this hydraulic machine. The historical development is discussed in some detail with the object of ascertaining what research work remained to be done. The author presents his own theory based on the application of general laws of mechanics to the study of a specially designed experimental hydraulic ram. By means of a theory developed, which agrees satisfactorily with experiment, it is possible to forecast the behaviour of any automatic hydraulic ram, provided that the following four properties of a given installation have been determined separately by experiment: ( a) loss of head in the drive pipe; ( b) loss of head due to the impulse valve; ( c) drag coefficient of the impulse valve; and ( d) head lost during the period of retardation.

Sign in / Sign up

Export Citation Format

Share Document