RU2793923C1 - Barrel wear meter - Google Patents

Abstract

FIELD: measuring technology.

SUBSTANCE: invention can be used to measure the wear of smoothbore or rifled barrels. The barrel wear meter contains a measuring cylinder with known geometric dimensions placed inside the barrel, to create excess pressure in the breech section - an oil tank, a pipeline for supplying oil to the breech, a main valve. The barrel bore wear gauge is installed vertically and additionally contains: a flow meter, a float with an axial rod protruding from it, graduated in units of length and containing a reading index to determine the vertical position of the free oil surface during measurements.

EFFECT: possibility to simplify measurements and improve accuracy.

1 cl, 1 dwg

Description

The invention relates to measuring technology and can be used to measure the wear of smooth or rifled trunks.

A device for determining the wear of the barrel bore of artillery weapons [1] in the form of sensors and devices mounted on the barrel. The outputs of the first and second sensors are connected to the first and second inputs of the projectile velocity measurement unit, there are series-connected projectile velocity analysis unit, an analog-to-digital converter, a memory unit, a transmitter, and a receiver.

The disadvantages of this invention are the complexity of the device, the inability to use the channels of the trunks of small diameter.

As a prototype, a method for measuring bore wear and a device for its implementation was chosen [2]. A device for measuring bore wear, comprising a measuring cylinder with known geometric dimensions placed inside the barrel, an oil tank, a main valve, an oil reducer for pressure control and a pressure gauge for measuring it, a flange for supplying oil to the breech breech, plugs for ejector holes, an outlet flange with a lock, connected to the measuring cylinder of the mounting rod with a scale, installed in the muzzle, a measuring vessel and a stopwatch for measuring the time of its filling. The wear of the bore is determined by the calibration graph, built according to the dependence

where Q - fluid flow;

D is the diameter of the measuring cylinder;

b - bore wear;

p - pressure in the breech;

μ is the kinematic viscosity of the liquid;

l is the length of the measuring cylinder placed in the barrel.

The disadvantages of this invention is the complexity of the device due to the need to measure from each side of the trunk. In addition, the device can only operate when a steady-state oil flow regime is reached, but there are no instructions for ensuring this regime.

The purpose of the claimed invention is to increase the efficiency of the wear gauge through the use of a device that allows you to accurately record that the flow regime is steady, reducing the number of devices.

This goal is achieved by the fact that the wear gauge, containing a measuring cylinder placed inside the barrel, an oil tank, a main valve, a pipeline for supplying oil to the breech, according to the invention, has additional, a flow meter, a float with an axial rod protruding from it, graduated in units of length and containing a reference index to determine the vertical position of the free oil surface during measurements, the bore is set to a vertical position, the pressure in the breech breech is determined by the vertical position of the free oil surface.

An additional float allows you to accurately record that the flow regime is steady and determine the height of the liquid column. The vertical position of the bore makes it possible to operate in a non-pressure mode, which contributes to the uniform filling of the space with oil without the formation of fluid turbulence, which is characteristic of working in a pressure mode.

A device for measuring bore wear (Fig. 1) based on hydrodynamic measurements is proposed, which contains a measuring cylinder 3 placed inside the barrel 1 with known geometric dimensions, an oil reservoir 5, a flow meter 6, a main valve 7, a pipeline 8, a centering muzzle clip 9 with a latch 10, a mounting rod 2 installed in the muzzle, a float with an axial rod protruding from it 4.

The muzzle guard 9 contains a mounting rod lock and a reference index for determining the position of the measuring cylinder 3. By moving the measuring cylinder, it is possible to measure wear in any section of the barrel (wear 11). The reading of the position of the measuring cylinder is carried out according to the scale applied to the adjusting rod.

The wear gauge works as follows. To measure wear by the hydrodynamic method, the following is carried out:

- bringing the trunk to a vertical position;

- introduction into the desired section of the barrel of the measuring cylinder;

- installation of a muzzle guard with a centering circle for the mounting rod;

- installation of a muzzle guard with a centering circle for installing a float in the breech breech;

- installation of a float;

- opening of valve 7;

- setting, by means of gravity filling of the volume, the value of the liquid height h to create the necessary overpressure in the breech breech;

- Achieving a steady state of oil flow;

- fixing the readings of the flow meter and the reference index of the float;

- determination of wear of the barrel bore according to the calibration schedule.

By changing the oil flow in the pipeline 8 and the height h by partially opening or closing the valve 7, we achieve a position in which the float remains stationary (does not move vertically). This indicates a steady flow of oil. For this mode, the oil consumption in the pipeline 8 and in the gap between the bore and the surface of the measuring cylinder (wear 11) is the same. We determine the flow rate by taking readings from the flow meter 7, using the reference index of the float, we determine the height h of the vertical position of the free surface of the oil. The pressure h is determined from the dependence p=ρgh known in hydraulics, where ρ is the density of the oil, g is the free fall acceleration.

The essence of the invention is illustrated by graphic material, which is presented in:

fig. 1 is a diagram of a device for measuring bore wear.

The technical result of the claimed invention will simplify measurements and improve accuracy.

Information sources

1. Pat. No. 2498266 Russian Federation, IPC G01N 3/56. Device for determining the wear of the bore of an artillery weapon / F.M. Vytrishko, P.A. Ashurkov, V.V. Efanov, A.A. Bolotin, publ. in B.I., 2013. No. 31.

2. Patent No. 2368885 Russian Federation, IPC G01N 3/56, G01B 13/12, F41A 31/02. A method for measuring bore wear and a device for its implementation (options) / Yu.V. Zverev, P.E. Kotlyar, V.I. Mishnev, S.I. Nazarenko, publ. in B.I., 2009. No. 27.

Claims (1)

Barrel bore wear gauge, containing a measuring cylinder with known geometric dimensions placed inside the barrel to create excess pressure in the breech breech - an oil tank, an oil supply pipeline to the breech breech, a main valve, characterized in that it is installed vertically and contains: a flow meter , a float with an axial rod protruding from it, graduated in units of length and containing a reference index to determine the vertical position of the free surface of the oil during measurements.

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