JPS58177155A - Rotary number control apparatus of cutting type grain refiner - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to an improvement of a rotation speed control device for a grinding type grain milling machine.

In general, the load on a grain milling machine is proportionally changed by adjusting the degree of pressure at the outlet of the grain milling machine or by adjusting the speed, that is, the number of revolutions, of the grinding rotor.

In the present invention, the rotation speed of the grinding roller is manually set to a predetermined value, with an appropriate rotation speed specific to the degree of polishing progress, and at the same time, the degree of pressure at the discharge port is also adjusted as necessary. In order to operate at the standard load once set, it is necessary to prevent load fluctuations and stabilize the load. Therefore, if the adjustment of the rotation speed of the grinding roller is automatically controlled in accordance with the load of wave changes, the load changes instantaneously in direct proportion to the rotation speed, so the load can be adjusted extremely sensitively and stability can be maintained. can do.

If the load is automatically controlled by the degree of pressure at the outlet, the grain density in the milling chamber changes and there is a time lag before it responds to the resistance of the rotational force of the grinding trochanter, causing a hunting phenomenon. It is difficult to ensure that the negative 'lftIIIwr1, which is easy to occur and is sensitive, will go smoothly.

The present invention can automatically adjust the appropriate load as the grain milling progresses, making it possible to achieve maximum efficiency and highest yield milling, and achieve the effect of streamlining automatic grain milling with ideal load stability. can.

In addition, the transmission device implemented in the present invention includes one that connects the main shaft of the front and rear grain milling machines and the main shaft of the electric motor via a diameter variable adjustment pulley, and one that connects the main shaft of the grain miller and the main shaft of the variable speed electric motor. The former drives a reversible motor that performs variable operation of the variable adjustment pulley to adjust the rotation ratio between the main motor shaft and the main shaft of the grain miller, and the latter is a thyristor motor connected to the main shaft of the grain miller. In order to adjust the rotation speed of the main shaft of the Kostator motor, the modified motor, the DC motor, etc., the control electric circuit is connected to the transmission main part.

The present invention will be explained with reference to embodiment figures. In Figure 1,
A polishing chamber 3 in which a grinding type polishing trochanter 1 is mounted in a perforated whitening cylinder 2 is provided with a rice feed port 4 and a discharge port 5, and a pulley 7 is attached to the main shaft 6.
is connected by a belt 11 to a pulley 10 which is pivoted to the main shaft 9 of a variable speed electric motor 8 provided at the bottom, and a pressure cover 12 is provided at the outlet 5 of the milling chamber 3, and the pressure cover 12 is connected to an electric motor 14 for reversible rotation via a rotation mechanism 13, and the horizontal screw punch 15 connected to the rotation mechanism 13 is rotated in the forward and reverse directions by the forward and reverse rotation of the electric motor 14. As the fitted weight 16 is moved back and forth, the screw punch 15 itself moves up and down, and its operation is such that the pressure is adjusted by moving the compression lid 12 diagonally up and down via the connecting rod 17 and the screw rod 18. It is formed.

Next, in the transmission device shown in FIGS. 2 and 3, a split groove pulley 19 is mounted on the main shaft 6, and an outer disc-shaped ring 20 is slidably fitted on the main shaft 6. The outer side of the disc-shaped ring 20 is fired 2
1 so that the tension of the compression belt 22 is balanced, and the split groove pulley 26 fitted on the main shaft 25 of the drive motor 24 installed at the bottom of the frame 23 is aligned almost with the center line of the pulley 19. The belt 22 is tensioned, and the outer disc-shaped ring 27 of the $ 26 is loosely connected to the main shaft 25, and the end of the main shaft 25 is reversibly rotated forward and backward to move the disc-shaped ring 27 back and forth. A rotating electric motor 28 is provided.

Next, the electric circuit shown in FIG. 7 will be explained.

The circuit diagram shows a manual rotation speed control electric circuit A, a rotation speed automatic control electric circuit B, a compression degree manual control electric circuit C, and a motor 8.
, 14, etc. On the rotation speed adjustment side of the grain milling machine, the output side of a rotation speed manual setting device 29 consisting of a variable diameter pulley or the like is connected to one terminal on the input side of a differential comparator 310 via a converter 30. The output side of the differential comparator 31 is connected to the other input terminal of the comparator 310 via a load detector 32 consisting of a current transformer, etc., and the output side of the differential comparator 31 is connected to the variable speed motor 8 via a rotational speed control device 33. It is connected.

In addition, on the pressure amount adjustment side of the grain milling machine, a pressure degree manual setting device 34
The output side of the load detector 32 is connected to one input side terminal of the differential comparator 36 via the converter 35, and the branch path on the output side of the load detector 32 is connected to the other input side terminal of the comparator 36. The output side of the dynamic comparator 36 is connected to the reversible rotation electric motor 14.

The rotation speed manual setting device 29 has a main shaft 6 as shown in FIG.
A detection sensor 37 provided in contact with the tachometer 38 is connected to a tachometer 38, and the variable speed electric motor 8 is manually moved up and down by a rotary handle 39 to detect and set the rotation speed by the tachometer 38. As shown in the figure, a device is used in which a detection sensor 37 provided in contact with the main shaft 6 is connected to a tachometer 38, a brisetter 40 is connected to the tachometer 38, and the rotation speed is manually set by an operating rod 41. Ru.

With the above configuration, when raw brown rice is fed to the grain milling machine and the machine is started by setting an arbitrary predetermined rotation speed (for example, 800 revolutions per minute) in the rotation speed manual setting device 29, the milling room 3 The inner polishing trochanter 1 rotates to perform the polishing action on the inflowing brown rice. The whitening effect is caused by changes in the coefficient of friction caused by the amount of bran produced in raw brown rice, the amount of moisture contained, etc.
However, in the present invention, the rotation speed CMi set in the rotation speed manual setting device 29 is set to 800.
The converter 30 converts the rotation (rotation) into an electrical signal and inputs it to the differential comparator 31, and the current value of the variable speed motor 8 is input to the load detector 32 to detect the load state, and the detection signal is input to the load detector 32. The differential signal (+ or -) is input to the comparator 31 and compared with each other, and the rotation speed of the variable speed electric motor 80 is increased or decreased to 111 m according to the control signal from the rotation speed control device 33 which inputs the differential signal (+ or -). 8, the internal resistance is immediately corrected smoothly and quickly by increasing or decreasing the rotational speed, and is always stably maintained at the predetermined value, resulting in the highest efficiency and highest milling yield. It will be implemented. In addition, when adjusting the external resistance using the compression lid 12 as necessary, by setting an arbitrary predetermined weight value in the compression degree manual setting device 34 and starting the device, the weight value set in the manual setting device 34 can be adjusted. The converter 35 converts it into an electrical signal and inputs it to the differential comparator 36, and the current value of the variable speed motor 8 is input to the load detector 32 to detect the load state, and the detected signal is sent to the comparator 36. 36 and compare them with each other, and send the differential signal (+ or -) to the reversible rotation electric motor 14 to rotate the horizontal screw punch 15 in forward and reverse directions, and move the weight 16 back and forth to externally The resistance is reliably corrected smoothly and quickly, and a high-efficiency whitening action is carried out.

Note that the adjustment of the internal resistance of the milling chamber 3 by changing the rotation speed of the main shaft 6 and the adjustment of the external resistance of the milling chamber 3 by changing the weight value of the compression lid 12 may be carried out in parallel. Of course.

[Brief explanation of drawings]

The drawings are illustrations of embodiments of the present invention. Figures 1 and 2 are side sectional views of the grain milling machine, Figure 3 is a side view of the rotation mechanism of the grain miller, Figure 4 is a perspective view of the pressure lid adjustment section, Figures 5 and 6.
The figure is a side view of the manual rotation speed setting device, and FIG. 7 is a block diagram of the control electric circuit. 1...Grinding type whitening trochanter 2...Porous wall whitening cylinder 3.
...Whitening room 4...Rice supply port 5...Discharge port 6...
・Main shaft 7...pulley 8...variable speed motor 9...main shaft lO...pulley 11...bell) 12...
Compression lid 13...Rotation mechanism 14...Reversible rotation, electric motor 15...Horizontal screw punch 16... Weight 17
... Connecting rod 18 ... Leopard rod 19 ... Split groove pulley 20 ... Disk-shaped shaft 21 ... Spring 22 ... Pressure heald 23 ... Frame 24 ... For driving Electric motor
25...Main shaft 26...Divided groove pulley 27...Plate shaft 28...Reversible rotating motor 29...Manual rotation speed setting device 30...Converter 31...Differential comparator
32...Load detector 33...Rotation speed control device
34... Compression degree manual setting W 35... Converter 36
...Differential comparator 37...Detection sensor 38...
・Tachometer 39...Rotation nozzle 40...Brisetter 41...Operation rod A...Manual rotation speed control electric circuit B...Rotation speed automatic control electric circuit C...Compression degree manual Control Electric Circuit Patent Applicant Figure 1 Figure 3 Figure 4 Figure 5 Figure 6 Figure 70 (C)

Claims (1)

[Scope of Claims] +11 Rotation speed control of a grinding type grain milling machine, characterized in that it is variably driven by an electric motor that connects a rotation speed manual control electric circuit of a grinding rotor and a rotation speed automatic control electric circuit. Device. (2) The rotation speed control device for a grinding type grain milling machine according to claim (1), which connects the main shaft of the grain milling machine to the main shaft of an electric motor via a variable diameter pulley. The rotational speed control device for a grinding type grain milling machine according to claim 1, which connects the main shaft of a 311118 machine and the main shaft of a variable speed electric motor.