单词 | hydraulic ram |
释义 | > as lemmashydraulic ram hydraulic ram n. an automatic pump in which the kinetic energy of a descending column of water in a pipe is used to raise some of the water to a height above that of its original source; also applied to the lifting piston of a hydrostatic press. ΘΚΠ society > occupation and work > equipment > lifting or hoisting equipment > [noun] > hydraulic ram1801 water ram1806 hydraulic ram1808 water balance1843 1808 Young in Philos. Trans. (Royal Soc.) 99 22 As a stream of water strikes on the valve of the hydraulic ram. hydraulic ram 5. In full hydraulic ram. extracted from ramn.1 a. A device in which, by an arrangement of valves, a body of water descending in a pipe is brought to rest suddenly and its kinetic energy used to raise a small portion of the water above the original level or to deliver it at increased pressure. ΘΚΠ society > occupation and work > equipment > lifting or hoisting equipment > [noun] > hydraulic ram1801 water ram1806 hydraulic ram1808 water balance1843 society > occupation and work > equipment > lifting or hoisting equipment > [noun] > for raising water well bucket1477 flail?a1500 kettle-mill1570 scoop1580 water engine1611 chain-pumpa1618 cochlea1648 water-screw1648 engine1652 bucket-fountain1663 chain1682 noria1696 tub-engine1702 tub-gin1702 well-pole1727 screw engine1729 rag1747 rag pump1747 swape1773 picotah1780 water balance1800 ram1801 well sweep1818 shadoof1836 hydraulic belt1856 water carrier1875 bailer1883 trip-bucket1926 1801 S. Shaw Hist. & Antiq. Staffs. II. 121/2 The New Hydraulic Ram, which is a self-moving water-work applicable to agricultural purposes. 1809 Philos. Trans. (Royal Soc.) 99 22 Almost in the same manner as a stream of water strikes on the valve of the hydraulic ram. 1851 H. Stephens Bk. of Farm (ed. 2) I. 27/1 The ram may be described as a sloping pipe in which the stream runs [etc.]. 1876 Nature 15 June 160/1 When a small quantity [of water] is required to be raised to a considerable height the Montgolfier ram is employed. 1932 Virginia Law Rev. 18 238 What difference does it make if a ram is installed to force the same quantity of the water up to his home..so that it can be more conveniently used? 1994 Amer. Scientist Oct. 470/3 Another transformer, a so-called hydraulic ram, makes water flow uphill, because a sudden surge of flow downhill drives a smaller surge to a higher level than that of the original reservoir. b. The larger or working piston of a hydraulic press, in which the pressure of fluid pumped into the cylinder acts over the cross-sectional area of the rod to produce a force typically used to lift heavy loads or to apply compression. Also: a hydraulic press. ΘΚΠ society > occupation and work > equipment > equipment for altering dimensions > [noun] > press > parts of presses worm1548 platen1594 follower1678 thrusting-screw1794 ram1816 1816 J. Smith Mechanic II. 396 It is desirable..to make use of the larger pump rod to raise the ram as expeditiously as possible. 1839 A. Ure Dict. Arts 1031 The hollow cylinder of the press, which, as well as the ram, is made of cast iron. 1858 D. Lardner Hand-bk. Nat. Philos.: Hydrostatics, Pneumatics, & Heat (new ed.) 10 The ram, the immediate object that receives and transmits the pressure. 1861 Times 7 Oct. 9/1 There were several men engaged in pumping water into the ram. I observed..that they were lifting the girder with one ram. 1862 Internat. Exhib.: Illustr. Catal. Industr. Dept. II. x. §2255 The hydraulic rams will safely lift a dead weight of 6000 tons. 1891 Science 6 Nov. 255/1 The press consists of an anvil block below and a ram above, the work being in a vertical direction. The ram works in a hydraulic cylinder. 1909 Chatterbox 175/2 A workman moves a lever, and a great hydraulic ram raises the platform high in the air above the ship's side. 1969 Proc. Royal Soc. A. 311 331 In conventional direct extrusion..the metal billet..is compressed in a container by a ram, and is forced through the orifice of the die in the direction of the ram travel. 1991 Atom Jan. 3/3 The new mechanical rig..can test the strength of large plates of metal by exerting a force of up to 10 000 tonnes with its versatile array of twenty hydraulic rams. < as lemmas |
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