RU71154U1 - DEVICE FOR EXTINGUISHING PRESSURE PULSATIONS IN HYDRAULIC HIGHWAYS - Google Patents

Abstract

The utility model relates to the field of hydraulic engineering and can be used to dampen pulsations and vibrations in hydraulic lines in a machine hydraulic drive. A device for damping pressure pulsations in hydraulic lines, contains a housing with a shock absorber located in it, an inlet and an outlet pipe. The hydraulic shock absorber is made in the form of a flexible pipe mounted in a spiral housing connected at both ends with fittings, which are installed at one end in openings made on the housing surface and connected at the other end via flexible hoses with a valve for supplying compressed air. The proposed device allows to increase the efficiency of damping the pulsations of the working fluid and allows you to use this device for any fluid pressure. 2 ill.

Description

The utility model relates to the field of hydraulic engineering and can be used to dampen pulsations and vibrations in hydraulic lines in a machine hydraulic drive.

Known damper of pressure and flow, containing a Central perforated pipe and connected with it a damping chamber formed by an elastic shell with a cross section in the form of an ellipse, equipped with a casing partially covering the central pipeline, the casing is installed coaxially to the central pipeline inside the casing and fixed in sectors limited by the central angle no more than 90 °, directed along the minor axis of the shell ellipse [A.S. USSR No. 1753174, IPC F16L 55/04, 1992].

The disadvantages of this damper are low efficiency during operation, significant dimensions and a small degree of reliability.

It is also known a device for damping pressure pulsations in hydraulic lines, in the housing of which are placed elastic capsules filled with a damping medium (damper of hydraulic shock) [A.S. USSR No. 861831, IPC F16L 55/04, 1981].

The disadvantages of this device are low efficiency during operation and a low degree of reliability.

The objective of the proposed technical solution is to increase the efficiency of damping pulsations in hydraulic lines.

The task is achieved by the fact that in the device for damping pressure pulsations in hydraulic lines, comprising a housing with a shock absorber located in it, an inlet and an outlet pipe. The hydraulic shock absorber is made in the form of a flexible pipe mounted in a spiral housing connected at both ends with fittings, which are installed at one end in openings made on the housing surface and connected at the other end via flexible hoses with a valve for supplying compressed air.

Figure 1 shows a device, a longitudinal section; figure 2 is a section aa in figure 1.

A device for damping pulsations and vibrations in hydraulic lines contains a housing 1, a flexible pipe 2 mounted in a housing 1 in a spiral, a valve 3 for supplying a compressed air regulating the degree of damping of pulsations and vibrations of the fluid pressure passing through the housing 1. Valve 3 is connected by flexible sleeves 4 with fittings 5 and 6 installed in the holes made on the upper part of the housing 1. At both ends of the housing 1, covers 7 and 8 are installed. The cover 7 has an inlet pipe 9 for the supply of working fluid, and in the cover 8 it is made Khodnev pipe 10 for the working fluid in hydraulic line output. For longitudinal fixation of the flexible pipe 2, thrust washers 11, 12 are installed.

The device operates as follows.

Before starting the pulsating working fluid through the inlet valve 3 by means of flexible pipes 4 and fittings 5, 6, the flexible pipe 2 is filled with air under pressure. The pulsating working fluid enters through the inlet pipe 9 into the cavity formed by the rolled flexible conduit 2 and transmits pressure fluctuations to the flexible conduit 2, deformation of which causes the air in the conduit 2 to compress and dampen the increase in the working fluid pressure and evenly distribute the stresses along the entire surface of the flexible pipe 2. The working fluid through the outlet pipe 10 goes into the hydraulic line.

Since the change in the volume of the pipeline 2 occurs with any changes in the pressure of the working fluid, the quenching of the pressure occurs in a wide range of vibrations with almost any magnitude of fluctuations.

The implementation of the hydraulic shock absorber in the form of a flexible pipe connected at both ends by fittings and by means of flexible hoses with a valve for supplying compressed air allows to increase the area of contact (interaction) of the working fluid, which passes through the body of the device with a damping medium (air) inside the flexible pipeline and allows you to increase the efficiency of damping pressure pulsations, and fittings allow you to create the pressure of the damping medium, which in turn allows you to apply this e apparatus of any fluid pressure.

Claims (1)

A device for damping pressure pulsations in hydraulic lines, comprising a housing with a hydraulic shock absorber located in it, an inlet and an outlet nozzle, characterized in that the hydraulic shock absorber is made in the form of a flexible pipe mounted in a spiral housing connected at both ends with fittings, which are installed at one end into openings made on the surface of the housing, and at the other end are connected via flexible hoses to a valve for supplying compressed air.