US1604965A

US1604965A - Regulator system

Info

Publication number: US1604965A
Application number: US664202A
Authority: US
Inventors: William M Bradshaw; John H Ashbaugh
Original assignee: Westinghouse Electric and Manufacturing Co
Current assignee: CBS Corp
Priority date: 1923-09-22
Filing date: 1923-09-22
Publication date: 1926-11-02
Anticipated expiration: 1943-11-02

Description

1926. 1,604,965 2 w. M. BRADSHAW ET AL REGULATOR SYSTEM Filed Sept. 22, 1923 2 Sheets-Sheet 1 INVENTORS W/l/lam M. Bradshaw & gghn H. Hshbaugh.

WITNESSES:

' 1926. 1,604,965 w. M. BRADSHAW El AL REGULATOR SYSTEM Filed Sept. 22, 1923 2 Sheets-She'e t 2 WITNESSES: INVENTORS William I1.Bradshaw (5 Patented Nov. 2, 1926 UNITED STATES PATENT OFFICE.

WILLIAM M. BRADSHAW AND JOHN H. ASHBAUGH, F WILKINSBURG, PENNSYL-' VANIA, ASSIGNORS TO WESTINGHOUSE ELECTRIC & MANUFACTURING COMPANY,

A CORPORATION OF PENNSYLVANIA.

REGULATOR SYSTEM.

Application filed September 22. 1923. SerialNo. 664,202.

Our invention relates to speed-regulator systems, and ithas special relation to regulator systems for governing the operation of hydraulic prime movers.

One object of our invention is to provide a speed-governor mechanism for a hydraulic prime mover that shall be responsive not only to speedvariations of the prime mover but to load variations of the dynamo-electric machine operated by the prime mover.

Another object of our invention is to provide a system of the above-indicated charactcr with a plurality of anti-hunting means.

The invention is illustrated as applied to water-wheel driven generators, the governor mechanism of the water wheel being controlled by an electric motor, the direction of rotation of which is controlled by an electrical regulator actuated in accordance With the speed of the water wheel. Electromagnetic means is provided for actuating the regulator to compensate for load variations upon the generator and means is provided for reacting upon the floating-lever system of the governor mechanism proportionally to the movement of the gate valve and simultaneously reacting upon the electrical regulator in accordance with the movement of the gate valve. y

In the accompanying drawings,

Figure 1 is a diagrammatic illustration of circuits and apparatus embodying our invention;

Fig. 2 is a detailed view of the dash-pot construction of the governor mechanism shown in Fig. 1; and

Fig. 3 is a diagrammatic illustration of circuits and apparatus embodyingv a modification of our invention.

Referring to Fig. 1, a Water wheel, having a penstock 2 and an outlet 3, is illustrated as driving a generator 4. The admission of water to the water wheel 1 is controlled by a gate valve 5, which is, in turn, controlled 4 by pilot valve mechanism 6, The valve mechanism 6 is governed by the operation of governing mechanism, indicated generally at 7, which may be of any well-known construction such as that illustrated and claimed in our copending application, Serial No.

520,593, filed Dec. 7, 1921.

Briefly, this governor mechanism comprises a floating lever 8, a second floating lever 9 and a connecting rod 10. The floating-lever system is actuated from a threaded shaft 11, the movement of which is governed by the operation of an electric motor 12 through illustrated gearing 13 to govern the operation of the pilot valve 14. Co-operating with the pilot lever 8 is a dash-pot mechanism 15, illustrated more in detail in Fig. 2, and connected to one end of the lever 8 by means of link 16. The link 16 is connected to a piston 17 that is located inthe partition 18 of the dash-pot. Also located in the partition 18 of the dash-pot is a second piston 19 that is connected to the link mechanism 21, and the operation of which is pro-' portional to the movements of a rod 22. The parts of rod '22; are shown somewhat separated, for convenience and simplicity of illustration. Rod 22 is mounted upon a connecting rod 23 that is secured to the shaft of the gate valve mechanism 5. Thus, as the gate is moved, the rod 22 receives a proportional movement that is communicated to the I piston '19 in a direction to return the piston 17 to its normal position prior to the obtaining of normal conditions upon the water wheel.

The operation of the governor motor 12 is controlled by

reversing switches

25 and 26, each of which comprises an operating coil 27, a holding coil 28 and a neutralizing coi 29. The holding coil 28 is permanently connected across supply-circuit conductors or bus bars 31v and the energizing and neutralizing coils are connected across the bus bars 31 through

contact members

32 and 33, re-. spectively, of a floating-lever type regulator. The

contact members

32 and 33 are located on opposite sides of the pivot 34 of a lever 35. Mounted upon one end of the lever 35 is a control electromagnet 36 that is energized from an auxiliary generator 37, which is mounted upon the shaft of the Water wheel 1 and, therefore, has a voltage proportional to the speed thereof. Mounted upon the opposite end of the lever 35 is a second electromagnet 38 that is energized from the transformer 39 and has in circuit therewith a reactance coil or reactor 41. The core 42 of the reactor is mounted upon the rod 23 so as to receive movements proportional to the movementthereof.

The operation of the system of Fig. 1 is substantially as follows :-As the operation of the water wheel is begun, the speed of the auxiliary generator 37 is low. Consequently, the

appropriate contact members

32 or 33 will be engaged so as to energize the

proper reversing switch

25 or 26. to operate the governor motor 12, thereby opening the gate valve 5 to admit water to the water wheel. wheel increases, the voltage delivered by the generator 37 increases. and the energlzation of the electromagnct 36 approaches the predetermined normal setting of the regulator mechanism. Hunting action is prevent ed in several ways. First, the reversing switches 25 and 26 respectively control auxiliary contact members 45 and 46. The contact members 45 are normally open, but, when the switch 25 is operated, they will be closed to insert a resistor 47 in circuit with the coil of the electromagnet 36, to thereby vary the strength of the coil 36 and correspondingly change the operation of the regulator mechanism so as to prematurely separate the engaged contact members. The auxiliary contact members 46 are normally closed and control a shunt circuit for a resistor 48 that is adapted to be inserted in circuit with the coil of the electromagnet 36 whenever the switch 26 is operated, to thereby change the setting of the electromagnet 36'and thus vary the operation of the regulator mechanism in accordance with wellknown principles.

The anti-hunting feature of the governor mechanism has been described above. The third anti-hunting operation is obtained by the variation of the reactor 41 in circuit with the electromagnet 38 of the regulator. The core 42 of the reactor is moved proportionally to the movement of the gate valve, and this core movement varies the current in the electromagnet 38 to change the setting thereof and cause it to assist in the changing of the operation of the regulator mechanism at the proper time to prevent hunting action.

The system of Fig. 3 is similar to the system of Fig. 1 and like parts of the two systems have been given similar reference characters. In Fig. 3, each of the above-described anti-hunting devices has been retained, but an electromagnet 51 that is energized from transformers 52 and 53 proportionally to the load upon, or delivered energy of the generator 4, has been added. The electromagnet 51 has co-operating therewith a dash-pot 54 that is hydraulically connected by means of a pipe 56 to the dash-pot 55 of the controlled electromagnet 36. Thus, variations in load upon the generator 4 will actuate the electromagnet 36 through the hydraulic connection to cause the

proper contact members

32 or 33 to engage, to thereby energize the appropriate re- As the speed of the water versingswitch and operate the governor motor 9 to correct for the load variation upon the generator 4.

Modifications in the system and arrangement and location of parts may be made within the spirit and scope of our invention, and such modifications are intended to be covered by the appended claims.

IVe claim as our invention 1. In a regulator system, a' prime mover, valve means for controlling the prime mover, governor mechanism for controllin the valve means, a motor for actuating said governor mechanism, electroresponsive regula-tor means for controlling the operation of said motor, means for energizing said clectroresponsive means in accordance with the speed of the prime mover, and antihunting means comprising a reactor actuated by movement of said valve means.

In a regulator system, a prime mover, valve means for controlling the prime mover, governor mechanismfor controlling the valve means, a motor for actuating said governor mechanism, electroresponsive regulator means. for controlling the operation of said motor, means for energizing said electroresponsive means in accordance with the speed of the prime mover, and a plurality of anti-hunting means for said system, one of said anti-hunting means comprising a reactor actuated by movement of said valve means.

3. In a regulator system, a prime mover, valve means for controlling the prime mover, governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electroresponsive regulator means for controlling the operation of said motor, means for energizing said electroresponsive means in accordance with the speed of the prime mover, anti hunting means actuated to modify the energization of the regulator means, and anti-hunting means actuated in accordance w th the movement of said valve means.

A. In a regulator system, a prime mover, valve means for controlling the prime mover, governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electromagnetic regulator means for controlling said motor means for energizing said electromagnetic regulator means in accordance with the speed of the prime. mover, anti-hunting means for modifying the energization of the regulator means, and additional antihunting means actuated in accordance with the movement of said valve means.

5. In a regulator system, a prime mover,

valve means for controlling the prime mover,

governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electromagnetic regulator means for controlling said motor,

means for energizing said electromagnetic regulator means in accordance with the speed of the prime mover, and anti-hunting means comprising a variable reactor actuated in accordance with movement of said valve means. g

6. In a regulator system, a prime mover, valve means for controlling the prime mover, governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electromagnetic regulator means for controlling said motor, means for actuating said regulator means in accordanc with the speed of the prime mover, variable reactor means, and electroresponsive anti-hunting means actuated by said variable reactor means.

7. In a regulator system, a prime mover, a dynamo-electric machine driven thereby, valve means for controlling the prime mover, governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electromagnetic regulator.

means for controlling said motor, means for actuating said regulator means in accordance with the speed of the prime mover, variable reactor means, and electroresponsive anti-hunting means energized by the said dynamo-electric machine and influenced by said variable reactor means in accordance with the movement of said valve means.

8. In a regulator system, a prime mover, a dynamo-electric machine driven thereby, valve means for controlling the prime mover, governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electromagnetic regulator means for controlling said motor, means for actuatin said regulator means in accordance Wlfil the speed of the prime mover, and electromagnetic anti-hunting means energized by said dynamo-electric machine comprising variable reactor means adapted to be actuated in accordance with the movement of said valve means. i

9. In a regulator system, a prime mover, valve'mea-ns for controlling the prime mover, governor mechanism for controlling the valve means, a motor for actuating said governor mechanism, electromagnetic regulator means for controlling said motor, means for actuating said regulator means in accordance with the speed of the prime mover, antihunting means for modifying the magnetization of said regulator means, a second antihunting means co-operatively connected to said regulator means and comprising an electromagnet having a movable cure, means for energizing the coil of said magnet, and means for modifying the energization of said coil in accordance with the movement of said valve means.

10. In a regulator system, a prime mover, an electric generator driven thereby, valve means for controlling the prime mover, gov- ,for energizing said coils from said ernor mechanism for controlling said valve means, a motor for actuating said governor mechanism, electroresponsive regulator means for controlling said motor, antihunting means comprising an electromagnet having a current and a voltage coil, means nerator, and a variable reactor in the v0 tage' coil circuit adapted to be actuated by movement of said valve means.

11. In a regulator system, a prime mover, an electric generator driven thereby, valve means for controlling the prime mover, governor mechanism for controlling said valve means, a motor for actuatingsaid governor mechanism, electromagnetic means for controlling said motor in accordance with the speed of said prime mover, anti-hunting means comprising electromagnetic load-responsive means energized in accordance with the watts of the generator, and means for modifying the energization of said load-responsive means in accordance With movement of said valve means.

12. In a regulator'system, a prime mover, valve means for controlling the prime mover, governor mechanism for controllin said valve means, a motor for actuating sai governor mechanism, electromagnetic means for controlling said motor in accordance with the speed of said prime mover, anti-hunting means comprising means for modifying the energization of said electromagnetic control means, additional anti-hunting means cooperativel connected .to said motor control means an comprising electromagnetic loadresponsive means, and variable reactor means for modifying the energization of said load-responsive means.

13. In a regulator system, a prime mover, valve means for controlling the prime mover, governor mechanism for controlling said valve means, a motor for actuating said governor mechanism, electromagnetic means for controlling said motor, in accordance with the speed of said prime mover, antihunting means modifying the energization of said motor control means, a second antihunting means co-operatively connected to said motor control means and comprisin electromagnetic load-responsive means, an means actuated in accordance with the movement of said valve means for modifying the energization of said load-responsive means.

14. In a regulator system, a prime mover, an electric generator driven thereby, valve means for controlling the prime mover, governor mechanism for controlling said valve means, a motor for actuating said governor mechanism, electromagnetic means for controlling said motor in accordance with the speed of said prime mover, antihunting means modifying the energization of said motor control means, a second antihunting means cooperatively connected to 'said motor control. means and comprising electromagnetic load-responsive means and a variable reactor actuated in accordance with the movement of said valve means.

15. In a regulator system, a prime mover, valve means for controlling the prime mover, governor mechanism for controlling said valve. means, a motor'for actuating said governor mechanism, a speed regulating and anti-hunting mechanism for controlling said motor comprising cooperating electromagnetic speed-responsive means, electromagnetic load-responsive means, electromagnetic voltage-responsive means and means for modifying the energization of said load-responsive means and said voltage-responsive means in accordance with the movements of said valve means.

- 16. In a re 'ulator system, a prime mover,

sive means in accordance with the movements of said valve means.

17. In a regulator system, a prime mover, and an electric generator driven thereby, valve means for controlling the prime mover, governor mechanism for controlling said valve means, a motor for actuating said governor mechanism, a speed regulating and anti-hunting mechanism for controlling said motor comprising electromagnetic means actuated in accordance with the speed of said prime mover, electromagnetic means actuated in accordance with the voltage of saidgenerator, and electromagnetic means actuated in accordance with the watts of said generator, said last-mentioned means comprising means for modifying the energiza- .tion of the voltage-actuated means and the voltage coil of the watt-actuated means in accordance with the movements of said valve means, and means for co-ordinating the effects of the several electromagnetic means.

In testimony whereof, we have hereunto subscribed our names this 17th day of September, 1923.

WlLLIAM M. BRADSHAW. JOHN 1-1. ASHBAUGH.