Hydrostatic interference fit joint

Abstract

The present invention relates to a novel hydrostatic interference fit joint, in which an assembly chamber has two diameters: a section S1 and another, thinner section S2, which forms part of a cylinder composed of several cylinders with an interference fit joint. The chamber needs to be loaded with a cylinder that fits snugly into section S1 but does not fit into the thinner section S2, so the cylinder has two diameters. Then, when the assembly chamber is closed and pressure is increased, the diameter of the assembly chamber, particularly the diameter of section S2, increases, and when the pressure is released, the composite chamber is assembled with section S2. For ease of assembly, the assembly chamber is preferably operated upright with section S1 on top so that when pressure is increased, the composite cylinder falls inside section S2 under its own weight. This is then disassembled, resulting in a composite cylinder with another cylinder joined by an interference fit. For reuse, another section S2 needs to be installed in the assembly chamber.

Description

[Technical Field]

[0001] One method for manufacturing a thick-walled cylinder used to generate high pressure is to make it from several concentric cylinders joined by an interference fit using hydrostatic pressure. [Background technology]

[0002] One method of manufacturing a composite cylinder is to use an assembly chamber required to create a hydrostatically pressurized interference fit between two cylinders that interfere at atmospheric pressure, but it is possible to use an auxiliary cylinder to form a tubular chamber and increase the diameter of at least one of the two cylinders using the pressure in the assembly chamber to increase its inner diameter and eliminate the interference.

[0003] This is INAPI invention 202101788, which discloses a novel method for manufacturing composite cylinders or high pressure chambers used in high pressure pasteurization (HPP) of food, or for manufacturing high pressure machine elements (HIP), or for hydrogen storage. DETAILED DESCRIPTION OF THE INVENTION

[0004] This specification relates to a new assembly chamber that does not require the preparation of a tubular chamber for assembly. This assembly chamber is composed of two continuous sections, S1 with a larger diameter and S2 with a smaller inner diameter (Fig. 10). When this assembly chamber is used, it loses section S2 and incorporates it into the outside of the composite chamber according to the following procedure.

[0005] Within section S1 of the assembly chamber, a cylinder with a smaller inner diameter is placed in section S2 (Figure 20), and since this cylinder has a slightly larger inner diameter than section S2, it does not fit into section S2.When it is placed in a new assembly chamber and the pressure increases, the diameter of section S2 increases until the cylinder housed in section S1 fits into section S2.

[0006] As the pressure increases, an internal mechanism in the assembly chamber moves the cylinder so that it enters section S2. One possibility is to place S1 upright, with S1 on top, so that as the diameter of section S2 increases, the cylinder is displaced by its weight.

[0007] When the pressure is removed, the cylinder is combined with a new assembly chamber in section S2 (Figure 30), which is separated, leaving another cylinder and the remainder of the assembly chamber which must be reassembled.

[0008] The new assembly chamber should have a joining mechanism for the two sections so that it can be easily cut or separated after use to obtain the composite cylinder with the smaller half. It can be externally supported in the axial direction so that the chamber is not too stressed by axial pressure.

[0009] These are also preferably glued together when manufacturing the cylinder, particularly shorter, smaller diameter cylinder sections that form side caps to form chambers or simply to hold the composite cylinder together. [Brief explanation of the drawings]

[0010] [Figure 10] Figure 10: Shows the new assembly chamber with two sections S1 and S2. [Figure 20] Figure 20: Assembly chamber with the cylinders to be assembled in section S1 without any applied pressure. [Figure 30] Figure 30: Assembly chamber with the cylinder to be assembled in section S2 as the pressure increases and the cylinder to be assembled is allowed to move into section S2.

Claims

1. 1. An assembly chamber particularly useful for pressurizing a fluid injected through any through-hole, characterized in that said assembly chamber is formed of at least two cylindrical sections S1 and S2 (11 and 12), one of which is larger than the other or which form a cylinder with a slightly frusto-conical shape, and is provided with two cylindrical caps (21, 22) of different sizes located at either end of said assembly chamber, and a member in the form of a cylindrical or conical tube (30) which fits into the first section S1 but not into the second section S2 when the assembly chamber is not pressurized.

2. 2. The assembly chamber of claim 1, wherein the assembly chamber is loaded with a tube (30) or another chamber of a size that fits within the first section S1 of the assembly chamber but not into section S2, and is sealed and placed upright in the loaded, unpressurized state; increasing the pressure of the fluid flowing into the assembly chamber causes the assembly chamber to expand or dilate, slightly increasing its inner diameter; the tube (30) then fits inside section S2 and falls by gravity; when the pressure is removed from the assembly chamber, the tube is tightly mated to section S2 of the assembly chamber; and the process is repeated with another assembly chamber, adding additional mated tubes to form a thicker-walled tube.

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