JPS6082925A - Rotor type flow meter - Google Patents

Abstract

PURPOSE:To improve a workability by extending a revolving to only one side of a rotor, and sticking and fixing this extended side to a casing body through a bearing structure body. CONSTITUTION:A revolving shaft 9 is extended to only one direction of a rotor 8, a recessed part 11 is pierced in the opposite direction, an end part 9a of the revolving shaft 9 is made to face in this recessed part 11, and fixing metallic fittings 10 are installed to the end parts 9a, 9a. A bearing structure body 12 is provided on an extended side 9b projected to the outside of rotors 8, 8, and the whole body of this bearing structure body 12 is inserted and stuck to a casing body 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a rotor-type flowmeter with a novel bearing structure.

(Prior Art) Generally, rotor-type flowmeters are known that measure the flow rate of fluid using various types of rotors, such as a non-circular gear rotor (trade name: Oval Gear) or a Roots-type rotor. .

This type of flowmeter has a structure in which a rotation shaft for holding the center of rotation of a rotor is provided, and both sides of the rotation shaft are supported by a flowmeter body or casing forming a metering chamber. That is, both ends of the rotating shaft are made to protrude outward from both sides of the rotor, and both sides of the protruding rotating shaft are properly supported within the casing via the bearing structure.

By the way, the measuring chamber in which the rotor is accommodated has a structure in which a casing is divided into at least two parts in order to accommodate one rotor, and is composed of a casing body and a lid body, each having a dividing surface in a direction perpendicular to the direction of the rotation axis. Equipped with therefore,
The bearings that support the rotating shaft of the rotor need to be formed in two places, the casing body and the lid, with high precision, and this high precision machining not only increases costs, but also increases the cost of weighing the rotor. Rotor drive tests and adjustment tests can only be carried out in a room covered by the assembly body and lid, which is extremely inconvenient, inconvenient, and inefficient, and also requires work such as maintenance or rotor repair/replacement. However, there were many problems in that the procedure after removing the lid was extremely troublesome and could not be carried out efficiently.

These problems arise from the fact that the structure in which the rotor is supported by the casing requires separate and independent bearing structures at two locations, the casing body and the lid.

(Objective of the Invention) This invention was made by paying attention to the above-mentioned problems, and there is a rotor in only one of the two members constituting the casing, the casing body and the lid body. It is an object of the present invention to obtain a rotor-type flowmeter having a so-called cantilever type bearing structure by forming a bearing part for the rotating shaft of the first lid body and omitting the bearing part of the other lid body.

By providing the above-mentioned cantilever type bearing structure, this invention eliminates the need to provide a bearing for the rotating shaft only in the main body and eliminates the need to provide a bearing on the lid at the opposite position. The precision machining of the bearing part is only required on one side, and the rotor assembly operation is simple and efficient, which prevents high costs and eliminates work such as rotor rotation adjustment, maintenance, or rotor repair/replacement. We can expect direct effects such as making it extremely simple.

In addition, this invention makes it possible to extract the amount of rotation of the rotor from the shaft end of the rotating shaft and display the count using mechanical or magnetic transmission means, as well as electrical measurement control such as unit pulse transmission and non-unit pulse transmission. The object of the present invention is to obtain a rotor-type flowmeter that allows the incorporation of means.

Furthermore, the present invention provides a rotor-type flowmeter in which a sensor means capable of detecting the rotational motion of the rotor is provided on a lid body having no bearing structure, and pulse generation for counting or control can be performed. In addition, the present invention further provides a rotor-type flow rate system that is completely equipped with a cantilever type bearing structure, so that the rotor can be driven in a suspended state by positioning the rotating shaft in the vertical direction. It's about getting the measure.

(Example) This invention will be explained in detail below.

First, two basic configurations of the present invention will be explained with reference to FIGS. 1 and 2.

Reference numeral 1 denotes a flow meter body having a fluid inlet 2 and an outlet 3, and includes a casing 7 consisting of a casing body 5 with a measuring chamber 4 bored therein and a lid 6.

Reference numeral 8.8 denotes a rotor disposed in the measuring chamber 4. In the illustration, non-circular gear rotors are used and are meshed with each other, but it can be of any desired structure such as a Roots-type rotor or a circular gear rotor. rotor can be used. Reference numerals 9, 9 represent rotational shafts of the rotors 8, 8, which are integrally fixed to the rotors 8, 8 using fixing fittings 10 such as fixing screws.

and the rotating shaft 9. 9 extends only in one direction of the rotors 8, 8, and is bored in the recess 11.11 in the opposite direction. ．． The fixing fittings 10 are attached to the fixing fittings 10a, . . . 9a.

Reference numeral 12.12 denotes a bearing structure, which is rotatably supported by a tubular support 14.14 with hair rings 13.13 interposed on the extending sides of the rotating shafts 9, 9.

In the case shown in FIG.
The entire bearing structure 12.127) is inserted and fixed into the casing body 5, which is a so-called cantilever type structure, but in the case shown in FIG. 2, a part of the bearing structure 12.12 rotates. The child 8.8 is inserted into the inner side of the casing body 5, and therefore only the parts 12a, 12a of the bearing structure 12.12 that protrude outward from the rotors 8, 8 are inserted and fixed into the entire casing body 5, forming a so-called piece. It is a holding type.

15 is a rotation transmission mechanism obtained from the outer end of one rotating shaft 9 via a desired gear mechanism, 16 is a magnetic coupling of the mechanism, 17 is a counter with a pulse generator, and 18 is a casing body 5 and a lid. Each of the fasteners for fixing the body 6 is shown.

The action and effect will be explained based on the vaporization structure.

The fluid flowing in from the inlet 2 rotates the rotors 8, 8 and flows out from the outlet 3, but the rotational speed of the rotors 8, 8 is transmitted to the rotation transmission mechanism 15 consisting of a gear mechanism through the rotating shaft 9, and is decelerated. After undergoing the rotational or constant speed rotation processing, the magnetic coupling 16 allows the counting section 17 with a pulse generator to perform counting, and furthermore, this pulse transmitter can be activated to perform remote control using electric pulse signals.

By the way, the rotation shafts 9, 9 of the rotors 8, 8 are the rotors 8, 8. ! The bearing structure 12.12 extends only on one side of 3.
Since this bearing structure 12.12 is inserted and fixed into the casing body 5, it is of a so-called cantilever type, and there is no support part, that is, a bearing part for the rotating shaft 9.9 on the lid body 6 side, so the rotor 8.8 Installation into the measuring chamber 4, removal and replacement of the rotors 8, 8, repair or rotation adjustment can be easily carried out by removing only the lid 6. The bearing structure 12.12 supporting the extension sides 9b, 9b is constituted by a tubular support 14.14 via a bearing 13.13, and the bearing structure 12.12 supports the rotor in the radial direction as well as in the thrust direction. The meshing rotation of 8 and 8 can be made to work smoothly and effortlessly.

Furthermore, as shown in FIG. 2, this bearing structure 12.12 is fitted within the casing body 5G for a part of the entire rotation. Since the support portion 12 is longer than the structure shown in FIG. 1, there is an advantage that a more accurate and stable bearing structure can be achieved.

A concrete embodiment of the invention having the above-described basic structure is shown in FIG.

Components that are the same as or correspond to those in the embodiment described above are denoted by the same reference numerals, and detailed explanations thereof will be omitted since they are redundant.

This Q embodiment has the configuration shown in FIG. 2, that is, a configuration in which a part of the bearing structure 12, 12 is inserted and recessed inside the rotors 8, 8. On the flowmeter measurement side of the casing 7, there is a flowmeter measurement mechanism 15f.
f: The auxiliary casing 20 having the protective shielding space 19 and the pulse emission number counting section 17 is integrally fixed. A magnetic coupling 16 is formed by a magnet (or magnetic material) 21 provided at the final end of the flow rate measurement mechanism 15 and a magnetic material (or magnet) 23 via a partition wall 22.

24. 24 is the concave portion 11 of the rotors 8, 8. , 11 show stop plates fixed to the shaft ends of the rotating shafts 9, 9 by fixing fittings 10.10, and a permanent magnet 25 is embedded in at least one stop plate 24 toward the outer station cover 6 side. A magnetic force capable of exerting the magnetic influence toward the inside of the lid body 6 is provided. Reference numeral 26 denotes a magnetic sensor embedded in the lid 6 so that the magnetic action of the permanent magnet 25 can be detected.

Therefore, when the rotor 8 rotates according to the flow rate, the rotation axis 9
rotates, and as the stop plate 24 also rotates, the permanent magnet 25 also rotates. Since this permanent magnet 25 exerts a magnetic action toward the lid 6, the magnetic sensor 26 embedded in the lid 6 operates under the influence of the magnet when the permanent magnet 25 approaches. When 25 is separated, the magnetic influence disappears and the sensor 26 stops operating.

The number of times the sensor 26 operates increases according to the rotation speed of the rotor 8, and the sensor 26 can accurately detect the count of the rotor 8.

Reference numeral 27 indicates an attached casing on the side of the lid 6 in which a digital or analog transmission mechanism 28 that is electrically connected to the magnetic sensor 26 is built in, and 29 indicates an electric lamp outlet of both attached casings 20 and 27.

In the figure, reference numerals 30 and 30 indicate fixing fittings such as nuts that are screwed and fixed to the ends of the extending sides 9a and 9a of the rotating shafts 9 and 9, and the bearing structure 12.30 that is fixed to the casing body 5. 12 tubular supports 14. Washers 31.
31'! The rotary shafts 9, 9 are securely fixed via r. 32 indicates a gasket.

Since the configuration is as follows, rotors 8, 8 due to fluid transfer
The rotation is transmitted from one rotating shaft 9 through the flow rate measuring mechanism 15 to the pulse transmitting counting unit 17 by the magnetic coupling 16, and the pulse transmitting counting unit 17 transmits a meter display and an electrical pulse signal. This allows various counting controls to be performed.

In this embodiment, the rotor 8 is equipped with another auxiliary casing 27.
Since the number of rotations of the motor can be taken out to the outside by the permanent magnet 25 and the sensor 26 and a count @ can be obtained as an electrical signal, for example, a digital or analog signal, it is possible to perform meter display and remote control in the same way.

Therefore, by providing the above-mentioned attached casing 27f, the flow rate measuring mechanism 15. Magnet, /J 7 pull 16. The other attached casing 20 including the pulse generating counting section 17 may be omitted.

On the other hand, the attached casing 27 may be omitted, leaving the other attached casing 20 in place.

By the way, the rotation axis 9.9 of the rotor 8.8 is the rotor 8.
, 8 is firmly fixed to the casing body 5 by a bearing structure 12.12 consisting of a tubular support 14° 14 with an extended side 9a+9a full bearing 13 interposed therebetween, and has a so-called cantilevered structure. Since it is equipped with a
Another advantage is that the lid body 6 is unnecessary and only the casing body 5 is required, making it extremely easy to process, and also making it extremely easy to remove the lid body 6 to adjust the meshing rotation, to remove and replace it, to repair, and to clean it.

(Effect of the invention) Several embodiments of this invention have been described above,
In this invention, the rotor can be fixed to the casing main body at its rotating shaft by a so-called cantilever type bearing structure, and can be freely rotated in the measuring chamber. Only the casing body (excluding the lid) needs to be worked on, making precision machining extremely easy, and since there is no bearing on the lid, rotor rotation adjustment, installation replacement, and repair are possible with the lid removed. It also makes cleaning and other tasks much simpler and easier.

In addition, since the rotation axis of the rotor is firmly supported by a tubular support including bearings, clearance adjustment for thrust etc. can be easily performed, and the entire casing and attached casing are made into an explosion-proof structure, making it safe to use. It is possible to measure the flow rate of the fluid, and various counting sections depending on the purpose can be freely attached to the flow rate measuring means.

According to the present invention, the rotating shaft of the rotor can be provided in a so-called suspended state in the vertical direction and the rotor can be supported by the bearing structure, so that the counter can be read from above or below. Since there is no restriction on the direction in which the number of counting parts is attached, there is an advantage that the space for installing the flowmeter is small.

Furthermore, according to the present invention, if the rotor is processed with resin, it becomes extremely lightweight, and since the rotation of the rotor is not unbalanced due to gravity, it has the advantage that it can operate smoothly and without strain.

[BRIEF DESCRIPTION OF THE DRAWINGS] FIG. 1 is a schematic cross-sectional explanatory diagram showing the basic configuration of a rotor-type flowmeter according to the present invention, FIG. 2 is a cross-sectional view of main parts showing another basic configuration, and FIG. The figure is an explanatory plan view of the trochanter seen with the lid removed in Figure 1, Figure 4 is a partial longitudinal sectional view 17i7 showing a specific configuration according to the present invention, and Figure 5 shows the main parts of the same. It is an enlarged sectional view. 1...Flowmeter body 4...Measuring chamber 7...Casing 8.8 consisting of casing body 5 and lid body 6 ... Rotor 9.9 ... Rotating shaft 12.12 ... Bearing structure 13.13 ... Bearing 14.14 ... Tubular support 15 ... Flow rate measurement Mechanism 16...Magnetic coupling 17.
.......Counting section with pulse transmission 19.27-...
Attached casing 24, 24...Stop plate 25...Permanent magnet 26...Magnetic sensor

Claims (5)

[Claims] (1) In a rotor-type flowmeter that measures concentrated acid in a fluid by detecting and counting the number of revolutions of a rotor rotatably disposed in a 31-volume chamber in a casing, one side of the rotor is A rotor-type flowmeter in which the rotating shaft (only the rotating shaft extends) is firmly fixed to the casing body via a bearing structure on this extending side. (2) A patent claim in which the bearing structure is formed by inserting a part of the bearing structure into one side of the rotor, and fixing only the extending side that projects to one side of the remaining rotor to the casing body. A rotor-type flowmeter according to item 1. (3) The bearing structure includes a bearing and a tubular support, and is fitted and fixed to the outer periphery of the extending side of the rotating shaft extending from the rotor through the bearing.
A rotor-type flowmeter as described in either item 1 or 2. (4) In a rotor-type flowmeter that measures the flow rate of fluid by detecting and counting the number of revolutions of a rotor rotatably disposed in a measurement chamber inside a casing, one rotor rotates only to one side. The shaft is extended, and the shaft is fixedly fixed to the casing body via the bearing structure on the extended side, and a stop plate with a permanent magnet is fixed to the center of rotation on the other side of the rotor with a recess formed therein. A rotor-type flowmeter that detects and counts the number of rotations of a rotor by installing a magnetic sensor with a lid as a partition wall. (5) A patent claim in which the bearing structure is formed by inserting a part of the bearing structure into one side of the rotor and fixing only the extending side that projects to one side of the remaining rotor to the casing body. Range of the rotor type flowmeter described in item 4 (6) The bearing structure consists of a bearing and a tubular support, and is fitted to the outer periphery of the extending side of the rotating shaft extending from the rotor through the bearing. A rotor-type flowmeter according to claim 4 or 5, which is assembled and fixed together.