l The characteristics of oval gear flow meter
Flow measurement and fluid flow has nothing to do, it is because oval gear flow meter is measured on the media to promote oval pressure head gear which measures the rotation.
Viscosity of the larger media, and measurement gear from leaking out of space Xizhong less leakage, the nuclear test medium Nien Paper larger, less leakage of error of measurement more favorable.
Oval gear flow meter high precision measurement, suitable for high viscosity media flow measurements, but does not apply to the fluid contains solid particles (solid particles will die gear cards, which can not be measured traffic). If the measured liquid mixture of gases in the media, will lead to measurement error.
Oval gear flow meter main technical data
Model |
Calibre |
Minimum flow |
The largest flow |
Accuracy |
Work pressure |
LC 10 |
10 |
0.04 |
0.4 |
0.2
0.5 |
1 .6Mpa |
LC 15 |
15 |
0.16 |
1.5 |
LC 20 |
20 |
0.3 |
3 |
LC 25 |
25 |
0.6 |
6 |
LC 40 |
40 |
1.5 |
15 |
LC 50 |
50 |
2.4 |
24 |
LC 80 |
80 |
6 |
60 |
LC 100 |
100 |
10 |
100 |
LC 150 |
150 |
12 |
120 |
Oval gear flow meter is a volume-flow meter for continuous or intermittent precision of the measurement of liquid flow in the pipeline or instantaneous flow. It is particularly suitable for heavy oil, polyvinyl alcohol, resin and other high viscosity of the medium Flow measurement.
l Oval gear flow meter works
Oval gear flow meter measuring some of the major mutual engagement by the two gear and the oval shell (measurement room) posed by, as shown below:
Oval gear tested in the medium pressure p = pl-p2 role, a role torque to rotate. (A), as shown in position, as P1> P2, in the role of P1 and P2 under the torque generated by a round of 1 to a clockwise direction of rotation, and a round of the Shell Ban Yuexing volume in the medium row To export and promote anti-clockwise rotation for round 2, then 1 to active round, 2 for the driven wheels, in (b) as shown on the middle, 1 and 2 are active round, while in (c), As shown in position, P1 and P2 role in a moment of a zero role in two of torque to the two anti-clockwise rotation crop rotation, and to have inhaled Ban Yuexing volume of exports to the media row, then 2 to active round, a round for the follower, and (a) is shown to the contrary. Reciprocating this cycle of round 1 and 2 each other round the turn and another driven by a rotation, will be tested medium volume for the unit to Ban Yuexing Once by a row of imports to exports. Obviously, the map (a), (b), (c) below, only that the oval gear rotating 1 / 4 weeks, and they measured from the media for a month and a half Described the plot, so elliptical gear every week to refer the measured by the quality of Parallelism Ban Yuexing volume for the four times, through oval gear flow volume of meteor Q:
Q 4 n0
In
n Oval gear rotation frequency (transfer / sec)
0 Ban Yuexing part of the volume (PayPal.)
In this way, in the oval gear flow meter Ban Yuexing volume 0 under certain conditions, as long as the measure of the rotation speed oval gear n, that can be measured media traffic.
Oval gear flow meter traffic signal (that is, the rotation speed oval gear n) of the show, the spot shows two shows and Far EasTone.
The gear will be displayed locally rotating through a series of adjustments and the slow speed than the body, directly with the instructions on the instrument panel-connected, and after a mechanical counter to the overall show.
Far EasTone show mainly through the slowdown after the gear driven rotary permanent magnets, making spring relay contacts with the permanent magnet to the same frequency synchronous rotation to close or disconnect, thereby sending a pulse of electricity much to another instrument display .
l Oval gear flow meter installation
Oval gear flow meter should be clean before installation in the pipeline. If the liquid contains solid particles, it must be in the upper reaches of filters in the pipeline; if gas should be installed with exhaust devices.
Oval gear flow meter on the straight before and after the paragraph did not necessarily demand. It can be either a horizontal or vertical installation. Installation, should enable the flow meter oval gear rotation axis parallel with the ground.
l Oval gear flow of the use of juice
In accordance with the requirements of the correct installation of the oval gear flow meter, when used to ensure sufficient precision, usually a total value of the accuracy of 0.5, is a more accurate flow measurement instruments. However, if the measured use of the medium flow is too small, gauges the impact of the leakage error will be highlighted, can no longer guarantee sufficient accuracy. Therefore, the specifications of different models of the oval gear flow meter to a minimum flow to allow the use of value only when the actual measured flow of traffic to allow greater than the threshold value, the accuracy can be guaranteed.
Secondly, the use of oval gear flow meter to the attention of the media temperature can not be tested too high, otherwise it will not only increase the measurement error, but also to gear the possibility of a death card. To this end, an oval gear flow meter instruments in use under the temperature range of use.
After long-term use of the oval gear flow meter, its internal gear will be wear and corrosion, thus affecting the measurement accuracy. Therefore, we should always pay attention to observe, and periodically removed for inspection, if conditions allow the best regular calibration. |
