SU1286680A1 - Diesel hammer - Google Patents

Abstract

The invention relates to diesel hammers used to sink piles and similar elements. The purpose of the invention is to increase the durability of the hammer by providing a guaranteed non-impact mode of operation. Diesel hammer, made in a tubular version, contains a working cylinder 1 with a shock part in the form of a piston 2 and an anvil 3, a starting device 4 and a fuel system with a nozzle 5.

Description

i

(P

3

Fig.G

The torus is formed by the surfaces of the anvil 3 and the piston 2 at the lowest position of the latter. The working cylinder 1 and the combustion chamber 6 are made with geometrical dimensions that satisfy the ratio, “. -) cmh, “a.Kw where Va is the total volume of the cylinder, m,. Vc is the volume of the combustion chamber, c is the empirical coefficient equal to 0.33 10 V / kg p m is the mass of the impact part, kg; the maximum structural height of the impact part, m. In this case, the ratio of the working stroke of the piston to the diameter of the cylinder is not more than 1.3. 2 Il.

one

The invention relates to a piling technique, in particular to diesel hammers, used to sink piles and similar elements.

The purpose of the invention is to increase the long eternity of the hammer by providing a guaranteed unstressed operation.

FIG. 1 shows a diesel hammer, made in a tubular version, a section along the axis of the cylinder; Fig 2 - the same, in the rod version.

Diesel hammer, filled in a tubular version (Fig. 1), contains a working cylinder 1 with a piston impact part 2 in the form of a piston 2 and an anvil 3, a starting device 4 and a fuel system (not shown) with a nozzle 5 installed in chamber 6 of the combustion formed by the surfaces of the anvil 3 and the core 2 at the lowest position of the latter.

The diesel hammer, made in the rod version (Fig. 2), contains a working cylinder 1, simultaneously it is a hammer with a hammer part, a piston representing an anvil 3 fixed on the base 7, a device 4 for starting and a fuel system (not shown a) with a nozzle 5 installed in the combustion chamber 6 formed by the end surface of the anvil 3 and surfaces, the recesses in the bottom of the working cylinder 1, with the lowest position of the latter.

In both embodiments, the working cylinder 1 and the combustion chamber 6 are made with geometrical dimensions satisfying the relation

Ve,. (V /): cmh

h (xnt

o

five

0

five

0

35

0

where Va is the total volume of the cylinder, m, V is the volume of the combustion chamber, c is the empirical coefficient,

equal to 0.33-10, m - mass of the shock part, kg, mox maximum constructive lifting height of the shock part-. ti, m

The ratio of the working stroke of the piston to the diameter of the cylinder is not more than 1.3.

The working process of the proposed diesel hammer, made in a tubular version (Fig. 1), is carried out as follows.

The piston 2 moves downwards, after the piston 2 isolates the cavity of the working cylinder 1 from the atmosphere, the process of compressing the fresh charge in the cavity of the cylinder 1 begins. At the same time, the temperature and pressure of the fresh charge increase.

After the piston 2 reaches a certain intermediate position, the fuel-system with the injector 5 is carried out with fuel to a volume limited by the surfaces of the piston 2, cylinder 1 and anvil 3.

Under the action of the high temperature of the compressible air charge, the fuel evaporates and the resulting air-fuel mixture ignites and burns. The high pressure of the combustion products acts on the piston 2, forcing it to move upwards, and also creates a powerful force through the anvil 3 on the pile.

After the piston 2 opens the exhaust to the atmosphere, the cylinder 1 is exhausted and purged, then the cycle repeats.

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Claims (1)

Invention Formula Diesel hammer, containing working cylinder, impact part of the combustion chamber, anvil, starting device and fuel system, characterized in that, in order to increase the hammer's long duration by providing a guaranteed unaccented mode of operation, the working cylinder and the combustion chamber is made with geometrical dimensions satisfying the following correlation Ve (V -V,) cmh Pugs where Od is the full volume of the cylinder, m J V is the volume of the combustion chamber, m, s is the empirical coefficient equal to 0.33. ten m is the mass of the shock part, kg; Max. maximum structural height of the impact of the shock, m, the ratio of the working stroke of the piston to the diameter of the cylinder is not more than 1.3. M Compiled by O.Voronova Editor N.Kishtulinets Tehred A. Kravchuk Korrektr V. V.ut ha Order 7687/28 Circulation 606 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4