RU2770341C2 - Piston single-stage compressor of high pressure - Google Patents

Abstract

FIELD: gas industry.

SUBSTANCE: invention relates to compressors of high pressure for gas compression. A piston single-stage compressor of high pressure for gas compression contains cylinders, in which pistons are installed to form a single working chamber. Cylinders are located on the same axis or on parallel axes. Pistons are installed with the possibility of alternate progressive movement with a stop at the upper dead point. The start of movement of the following piston begins after the stop of the previous one at the upper dead point. When injection is ended, all cylinder pistons are located at the upper dead point.

EFFECT: invention is aimed at an increase in the working resource of the piston single-stage compressor of high pressure.

1 cl, 4 dwg

Description

The invention relates to high pressure compressors for compressing gases.

Known high-pressure compressor and method of its operation [Patent RU No. 2432496, F04B 25/00, publ. October 27, 2011]. The essence of the invention lies in the fact that a multi-stage high-pressure compressor for compressing gases contains at least two working cavities, which are connected in series to obtain high pressure.

The disadvantage of analogue is that in the known technical solution, the resource of the cylinder-piston seals is low due to the significant speed of the piston.

Known high pressure compressor [Patent RU No. 191806, F04B 35/04, publ. 08/22/2019], in which gases are compressed in a piston stage with the parameters - working cycle time - more than 1s and compressor parameter ψ=S/D>10.

The disadvantage of this technical solution is the low resource of the piston seals due to the large value of the piston stroke.

Closest to the claimed technical solution is the compressor [Patent CN 109681401 A, F04B 27/02; F04B 27/06; F04B 39/00; F04B 39/12, publ. 04/26/2019], in which the cylinders are located radially to form a single working chamber, and the cylinders work in pairs.

The disadvantage of this technical solution is a large dead volume, since when the gas is compressed in two cylinders, the gas passes into the cavities of the cylinders that are not working at the moment (the pistons are at the bottom dead center), as a result, this reduces the compressor performance.

The objective of the invention is to increase the service life of a reciprocating single-stage high pressure compressor.

The task is achieved by the fact that in a single-stage reciprocating high-pressure compressor for compressing gases, containing N cylinders, in which pistons are installed to form a single working chamber, while the total piston stroke is N*S, where S is the piston stroke, according to the invention, the cylinders of a single working chamber are located on the same axis or on parallel axes, and the pistons are installed with the possibility of alternate translational movement with a stop at the top dead center, and the beginning of the movement of the next piston begins after stopping at the top dead center of the previous one, and at the moment of completion of injection, all pistons of N cylinders located at top dead center.

Achievable technical result is to increase the life of the compressor and increase its performance.

In FIG. 1 shows a parallel arrangement of cylinders.

Figure 2 shows the section A-A in figure 1

In FIG. 3 shows the arrangement of cylinders on the same axis, option 1.

In FIG. 4 shows the arrangement of cylinders on one axis, option 2.

The reciprocating compressor comprises a housing 1 with installed cylinders 2 and reciprocating pistons 3, the cylinders forming a single working chamber 4, in which a suction valve 5 and a discharge valve 6 are installed.

The reciprocating compressor operates as follows: at the initial time, the pistons 3 are at bottom dead center (BDC). The movement of the pistons 3 occurs simultaneously or alternately. When moving in turn, the piston of one cylinder moves from BDC to top dead center (TDC) and stops, after which the next piston 3 starts moving and also stops at TDC and so on until the last cylinder. Thus, the total stroke of the pistons is N * S, where N is the number of cylinders 2, and S is the stroke of the piston 3. During the movement of the pistons 3 from BDC to TDC, the volume of the working chamber 4 decreases, the pressure of the compressed gas increases and when the discharge pressure is reached, it opens the discharge valve 6 and the gas leaves the working chamber 4 to the consumer, when the pistons move from TDC to BDC, the suction valve 5 is open and the gas enters the working chamber 4. The pistons 3 reach the BDC, the working chamber is filled with gas and after that the process repeats.

Thus, the mode of operation of the proposed stage with sequentially (this allows you to increase the time of gas compression and get gas at a lower temperature) or simultaneously moving (this allows you to reduce the leakage of compressed gas through leaks in the working chamber) pistons allows you to get a high discharge pressure in one compression stage, since the change in the volume of the working chamber is simulated, as in the analogue with the parameter ψ=S/D>10, while each of the pistons travels a path N times shorter in one cycle than with one working chamber. It is known that under the same operating conditions (speed, temperature, load) the resource in friction pairs directly depends on the distance traveled [Fundamentals of tribology (friction, wear, lubrication): textbook. for tech. universities / E.D. Brown [and others]; ed. A.V. Chichinadze. - M.: Center "Science and Technology", 1995. - 778 s]. Thus, the service life of the seals is increased by N times.

Claims (1)

Piston single-stage high-pressure compressor for compressing gases, containing N cylinders in which pistons are installed to form a single working chamber, while the total piston stroke is N * S, where S is the piston stroke, characterized in that the cylinders of a single working chamber are located on one axes or on parallel axes, and the pistons are installed with the possibility of alternate translational movement with a stop at the top dead center, and the start of movement of the next piston begins after stopping at the top dead center of the previous one, and at the end of injection, all pistons of N cylinders are located at the top dead center.

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