US1219928A

US1219928A - Fluid-pressure governor.

Info

Publication number: US1219928A
Application number: US11616016A
Authority: US
Inventors: Ralph C Enyart
Original assignee: P H & F M Roots Co
Current assignee: P H & F M Roots Co
Priority date: 1916-08-21
Filing date: 1916-08-21
Publication date: 1917-03-20
Anticipated expiration: 1934-03-20

Description

R. C. ENYART.

FLUID PRESSURE GOVERNOR. APPLICATION FILED Aue.2|,19|6.

1,219,928. Patented Mar. 20, 1917.

IIAII Ralph 6. fnyd/f Inventor 13y. 2 0- az/ Attorney ormon;

RALPH C. ENYART, OF CONN ERSVILLE, INDIANA, A-SSIGNOR TO THE P. H. 8t F. M. ROOTS COMPANY, OF CONN ERSVILLE, INDIANA. I

FLUID-PRESSURE GOVERNOR.

Specification of Letters Patent. P te t d 20, 1917 Application filed August21, 1916. Serial No. 116,160.

fluid pressure governors designed to appropriately modify the speed of an engine or other motor operating the pump which deals with a fluid.-

It is not unusual in pressure governors of this general class, to cause the governor to act on a pilot valve controlling the action of a hydraulic engine operating upon the speed-changing mechanism of the driving engine so that if the pressure being produced by the pump falls below the normal the engine will be speeded up to proper eX- tent, and vice versa. And similarly, if it is the duty of the pump to produce a partial vacuum and the degree of vacuum falls improperly below the normal the governor will increase the speed of the engine and improve the vacuum, and vice versa.

My invention aims at improving the sensitiveness of governors of this class and in providing proper adjustment for certain parts without interfering with or bein interfered with by the sensitive action 0 the governor.

My invention will be readily understood from the following description taken in conneotion with the accompanying drawing in which:

Figure 1 is a vertical diametrical section of a governor exemplifying my invention; and

Fig. 2 a horizontal section of parts thereof in the plane of line a of Fig. 1.

A diversity of scales is employed in the drawing. 7

While my governor may be employed in governing either pressure or vacuum, I will make the description with referenceto the governor when designed for controlling a vacuum.

In the drawing 1, indicates an open tank:

2, a bridgetree secured to the top of the tank: 7

3, the casing of the pilot-valve for bringing about changes in the speed of the pump in'connection with which the governor is to be employed:

at, a conduit connecting one end of the pilot-valve casing with the hydraulic e11- gine which is to operate suitable mechanism in regulating the speed of the engine or other motor driving the pump:

5, a similar conduit connected with the opposite end of the pilot-valve casing:

6, the supply conduit for admitting motive liquid to the pilot-valve casing:

7, an exhaust conduit connected with both ends of the pilot-valve casing, all the conduits thus far referred to connecting appropriately with the interior of the pilot-valve cylinder through the medium of ports, as

, usual: and

8, a spool-valve working within the pilotvalve casing.

The spool-valve is shown in neutral position, covering the ports of conduits 4 and 5, supply-conduit 6 being open at all timesto the pilot-valve casing between the heads of the spool-valve, while the exhaust conduit 7 is open at all times to both ends of the spoolvalve.

This pilot-valve acts in the usual manner, that is to say, if the spool-valve be shifted to the left it will permit pressure-liquid from supply-conduit 6 to go through conduit 5 and at the same time permit pressure liquid to discharge from conduit 4, and correspondingly, but reversely, if the spool-valve be shifted to the right. When the pump is producing normal condition of vacuum then there should be no movement of liquid through any of the conduits, and the spoolvalve should be on lap, as indicated in the drawing. It is the duty of the governor to shift the spool to the right or to the left or to neutral position.

Proceeding with the draw1ngz 9, indicates a float immersed in liquid in.

the tank, this float having aguiding opening in its floor:

10, a hollow standard secured at thefloor of the tank and extending up through'the guiding opening in the floor of the float and having sliding engagement therein:

11, ports through the base of the standard:

12, a ported sleeve-valve surrounding the ported portion of the standard and adapted,

by rotary adjustment, to adjust the effective area of the ports:

13, a screw projecting within the tank and having a handle exterior to the tank, the turning of this screw being adapted to ad just a nut upon the screw:

14, a rod connecting the nut of screw 13 with the sleeve-valve:

15, a fluid-conveying pipe extending up to near the top of the float, this pipe passing through the hollow standard and being much smaller than the interior of the standard:

16, a pipe connected with the base of pipe 15 and adapted to place pipe 15 in communication with the main, which, in the case assumed, carries a partial Vacuum:

17, water in the tank: 7

18, water in the float, these two bodies of water being in free communication with each other through the hollow standard and its ports:

19, a lever pivoted on the bridgetree and having segmental ends one of which is over the center of the float and the other of which projects outwardly beyond the tank:

20, a chain connecting the float with the inner end of lever 19:

21, a chain depending from the outer end of the lever:

22, adjustable weights supported by this chain: 7

23, an arm fast with lever 19:

24:, an arm disposed between the pilotvalve and arm 23 and connected with the stem of the spool-valve:

25, a link connecting arms 23 and 24::

26, the assumed level of the liquid in the tank: and

27, the assumed level of the liquid in the float.

Let it be assumed that it be desired to maintain in the main connected with pipe 16 a constant vacuum represented by ten inches height of water column. Such vacuum acts upon the top of the water in the float, while atmospheric pressure acts upon the top of the water in the tank around the float. Assume a suflicient quantity of water to be placed in the tank, the water entering freely to the float, and assume that the counterbalancing weights have been so adjusted that the float will occupy such vertical position that the distance from water level 26 to water level 27 is ten inches, this representing a ten inch seal for the governor and corresponding with the desired ten inches of vacuum in the main connected with pipe 16 and in the upper part of the float. While these conditions eXist there will be no call for change in the speed of the pump, and the pilot-valve will be closed.

If, now, for any reason whatever, the vacuum in the main falls, a quickening of pump speed becomes necessary. The lessening of the vacuum in the main results in a corresponding lessening of the vacuum in the top of the float and the water in the float will descend until the distance between

water levels

26 and 27 is less than the normal ten inches. l/Vhen this occurs then the weight mechanism will elevate the float somewhat and will move the spool-valve to the right, which rightward movement of the spoolvalve is to be assumed as corresponding with a quickening of the pump speed. The quickening of pump speed brings about a raising of the vacuum in the main and in the top of the float, whereupon the float will descend to normal position and the spool-valve will be closed. In case the vacuum in the main rises then the operation of parts will be the reverse of that just described and the pump will be slowed down until the vacuum in the main is brought back to normal. I

The float I is extremely sensitive and it may happen that the float moves too quickly in its rising and falling motions owing to the freedom with which water may pass to and from the interior of the float through the open ports in hollow standard 10. By adjusting sleeve-valve12 these ports may be closed to such extent as to bring about a dashpot effect in retarding the flow of water to and from the float.

The hollow spindle 10 acts as a vertical guide for the base of the float, and the vertical central disposition of chain 20 acts in guiding the top or" the float. The sleeve valve may be adjusted without touching the float. Any valve arrangement on the float itself would bring about dilflculty in adjusting such valve arrangement and observing its accuracy of adjustment while the float is moving. Also the manipulation of any valve arrangement on the float would in terfere with the freedom of movement of the float. In other words, in the present arrangement, the movementof the float is not interfered with by manipulating the valve, and the accurate manipulation of the valve is not interfered with by the movement of the float. The parts should be so designed that no movement of the float within the contemplated range of the governing action should bring the floor of the float above the top of the hollow standard, and the general height of the apparatus should of course be such as to care for the desired range in pressure or vacuum.

It is to be observed that the apparatus is self-contained with parts arranged for special convenience inadjusting. While description has been made of the manner in which the governor controls a vacuum, the use of the governor in controlling pressure instead of vacuum in the main will be obvious, pressure instead of vacuum in such case being maintained in the top of the float.

The desired degree of vacuum or pressure to be maintained by the governor is adjusted by increasing or lessening the weights so that the difference in heights of

water levels

26 and 27 will represent a water column corresponding with the desired vacuum or pressure.

I claim 1. A fluid pressure governor comprising, a tank, a hollow float disposed within the tank, adjustable counterbalancing mechanism connected with the float, controlling means adapted for operative connection with devices for controlling the speed of a pump, connections between such controlling means and the float, a hollow standard fixed in the base of the tank and having a sliding fit in a guiding aperture in the base of the float and provided at its base with an opening to permit water to pass between the tank and the interior of the float while the float is stationary or moving, and a pipe extending axially through the standard and leading from the upper portion of the float and to the exterior of the float and adapted for connection with a main, combined substantially as set forth.

2. A fluid pressure governor comprising, a tank, a float disposed within the tank, adjustable counterbalancing mechanism connected with the float, controlling means adapted for operative connection With-devices for controlling the speed of a pump, connections between such controlling means and the float, a conduit leading from the base of the tank to the base of the float and adapted to permit water to pass between the interior of the float and the tank while the float is stationary or moving, a valve in said conduit to control the flow of water between the tank and float, means for adjusting said valve from the exterior of the tank, and a conduit leading from the upper portion of the float and to the exterior of the float, and adapted for connection with a main, combined substantially as set forth.

3. A fluid pressure governor comprising, a tank, a float disposed within the tank, adjustable counterbalancing mechanism connected with the float, controlling means adapted for operative connection with devices for controlling the speed of a pump, connections between such controlling means and the float, a hollow standard secured at the floor of the tank and having sliding engagement with the floor of the float, a ported sleeve-valve surrounding the base of the standard and cooperating with ports in the base of the standard, means for angularly adjusting the sleeve-valve from the exterior of the tank, and a conduit leading from the upper portion of the float and to the exterior of the float and adapted for connection with a main, combined substantially as set forth. A. A fluid pressure governor comprising,

a tank, a float disposed within the tank, ad-

justable counterbalancing mechanism consleeve-valve surrounding the base of the standard and cooperating with ports in the base of the standard, a screw disposed within the tank and rotatable from outside the tank, a link connecting said screw with the sleeve-valve, and a conduit leading from the upper portion of the float and to the exterior of the float and adapted for connection with a main, combined substantially as set forth. 1

5. A fluid pressure governor comprising,

a tank, a float disposed within the tank, adjustable counterbalancing mechanism connected with the float, controlling means adapted for operative connection with devices for controlling the speed of a pump, connections between such controlling means and the float, a hollow standard secured at the floor of the tank and having sliding engagement with the floor of the float, a ported sleeve-valve surrounding the base of the standard and cotiperating with ports in the base of the standard, means for angularly adjusting the sleeve-valve from the exterior of the tank, and a conduit leading from the upper portion of the float and down through the interior of the hollow standard and proj ecting to the exterior of the tank and adapted for connection with a main, combined substantially as set forth.

6. A fluid pressure governor comprising, a tank, a float disposed within the tank, adjustable counterbalancing mechanism connected with the float, a vertical chain suspension serving as means for connecting the float with the counterbalancing mechanism and as means for guiding the top of the float, controlling means adaptedfor operative connection with devices for controlling the speed of a pump, connections between such controlling means and the float, a hollow standard fixed in the base of the tank and having a sliding fit in a guiding aperture in the base of the float and provided at its base with an opening to permit water to pass between the tank and the interior of the float while the float is stationary or moving, and a pipe extending axially through the standard and leading from the upper portion of the float and to the exterior of the float and adapted for connection with a main, combined substantially as set forth.

7. A fluid pressure governor comprising, a

devices, for controlling the speed of a pump, a float disposed Within the tank, a counterbalancing lever having a pivoted bearing on the bridgetree and provided with a segmental end over the center of the float and with a segmental end exterior to the tank, a chain connecting the first-mentioned end of the lever With the float, a chain depending from the outer end of the lever, adjustable Weights suspended bv the last-mentioned chain, an arm connected with the counterbalancing lever, a link connecting said arm With the pilot-valve, a hollow standard fixed in the base of the tank and having a sliding fit in a guiding aperture in the base of the float and provided at its base with an opening to permit Water to pass between the tank and the interior of the float While the float is stationarv or moving, and a pipe extending axially through the standard and leading from the upper portion of the float and to tne exterior of the float and adapted for connection With a main, combined substantially as set forth.

' RALPH G. ENYART. lVitnesses:

CLARENCE E. PORTER, WILLIAM E. TRUE.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G.