SU568869A1 - Viscosimeter - Google Patents

Description

tax and environmental changes in the devices. Constructive execution of such a viscometer eliminates the possibility of its use as a submersible device, which also narrows the range of its application.

The aim of the invention is to expand the measurement range and increase their accuracy.

This goal is achieved by the fact that the measuring probe with placed magnets freely attached to the vertical axis between the hermetic normcoM of non-magnetic material and the second, additionally introduced, hermetic core of the non-magnetic material with the contactless element distributed in it, both of which are hermetically sealed from non-magnetic bodies connected between the so5 with hollow struts.

FIG. 1 shows a general view of the viscometea in section and a block diagram of the viscometer; on | zig. 2 and 3 — the design of the shears of the capacitor; in fig. 4-7 - by: the polarity of changing the polarity of the lower sonctoscope of the exciting transducers during the operation of the viscometer.

The viscometer contains a measuring transducer, made in the form of a hermetically sealed housing / with a drive excitatory transducer in it in the form of excitation coils located at one end of the magnetic conductor 3, and a measuring probe 4, is ukreitny in stone supports 5 permanent magnets 6. The coupling element is housed in the housing 7, which is connected to the housing / with the help of a hollow one;

The switching element contains an axis 9, cut in stone supports 10, fixed to a disk with a magnet of a soft material 11, on which they are located along the metal plates 12 and disk 13 (Fig. 2), with a metal plate 4 fixed on it. In parallel with the disk 13, the plate 15 is placed (FIG. 3) with the disks on it; ladders 16 of the differential condensate) a. The output of the switching device is connected to the input of the switching circuit 17 (Fig.), Which switches the source of the guitar to the excitation transducers 18. Measurement circuit 19 performs the re-shaping time of one revolution of the probe 4 of the measuring converter constant input, entering the input self-searching: device 20.

The viscometer works as follows.

At the initial moment of time when the measuring probe 4 of the viscometer is located; The position shown in FIG. 4, the iodine signaling circuit is influenced by the control signal from the switching element: it switches on the voltage of the power supply of the driver bushes 2 so that the lower parts

the magnetic cores are magnetized with the polarities shown also in fig. 4. Due to the interaction of the probe magnet 4 and the magnetic field of the exciting transducers, the probe 4 begins to rotate counterclockwise. At the same time, as a result of the interaction of the magnetic fields of the magnets of the probe 4 and the switching element, the disk J3 begins to rotate. When the probe is moved to the position shown in FIG. 5, the plate 14 is above the plates 16 of the differential condenser. The signal from the latter arrives and the switching circuit 17, the current in the two coils of excitability 2 reversed, the lower parts and the magnetowires are magnetized as shown in FIG. 6, whereby the probe 4 continues to move counterclockwise. When moving the probe to the position shown in FIG. 7, another pair of excitation transducers is switched by the control signal, after which the process is repeated. The speed of the probe in this case unambiguously depends on the viscosity of the medium.

Using excitation coils of excitation coils 2 placed on magnetic cores 3, whose magnetic field interacts with the magnetic field of permanent magnets 6 installed in probe 4, makes it possible to increase the torque of the probe and the gap between the bottom of the case and the end part of the probe.

The matte connection between the probe and the switching device provides a tight connection for large distances due to the absence of parasitic braking moments in the switching device, which provides a sufficiently large gap between the lower end part of the probe and the housing of the switching device.

The free suspension of the probe in the stone supports 5 ensures minimal measurement errors, caused by friction losses in the substrates, and the absence of error due to changes in the level of the medium.

The design of the measuring transducer provides the possibility of using it as a flow-through or immersion device, which greatly expands the scope of application of the viscometer.

The operating range of the viscometer in terms of temperature is limited to the maximum operating temperature of the permanent magnets, which is 350 ° C for the material UNDK-35, and the operating temperature of the field winding of the excitation coils (for the PEFB-350 ° C brand).

B. Viscomet provides reliability and. accuracy of measurements.

Claims (2)

The invention includes a viskovimeter containing an excitation system enclosed in a hermetic casing of a nonmagnetic material, a measuring probe and a recording system, characterized in that, with a slit for extending the measuring range and increasing accuracy, it is equipped with a hermetic casing made of a nonmagnetic material with a non-contact switching located in it. the element, both bodies are interconnected by hollow racks, and the measuring probe is equipped with permanent magnets placed in it 5 and freely mounted on the vertical axis between in sealed enclosures. Sources of information taken into account in the examination: 1.I. M. Belkin et al., Rotary devices, “Machihiostroenie, M., 1968, p. 158. 2. Patent of the GDR No. 12180, cl. 42 / 7/02. g / IG ©  Chtsg 5 WIG  Vui.6