US2215488A

US2215488A - Plunger pump

Info

Publication number: US2215488A
Application number: US456570A
Authority: US
Inventors: Ernest J Svenson
Original assignee: Ernest J Svenson
Current assignee: Babcock and Wilcox Co
Priority date: 1930-05-28
Filing date: 1930-05-28
Publication date: 1940-09-24
Anticipated expiration: 1957-09-24

Description

E. J. SY ENSON PLUNGER PUMP Sept. 24, 1940.

Original Filed May 28', 1930 3 Sheets-Sheet l r 5 m W T N gwwvw Q 9% W m w E ii em Nb m% w 3 $1 5 9% v WWW, Q 8 W Q, N% MM Wm M m fiw R--- v Mmpm 8 N 3 n @w v aw w Q. @Q E a! i: QM: T I Wm Sept. 24, 1940. SVENSON 1 2,215,488

PLUNGER PUMP Original Filed May 28, 1930 a Sheets-Sheet 2 (Y 02 5am Sept. 24, 1940. E. J. SVENSON PLUNGER PUM Original Filed May 28, 1930 5 Sheets-Sheet 3 N @N/ N AQN KS Q

' I 1231127715 KPH/6511f 5 vans m WWI @MX- .W

Patented Sept. 24, 1940 UNITED STATES PATENT OFFICE Application May 28, 1930, Serial No. 456,570 Renewed July 28, 1939 13 Claims.

This invention relates generally to fluid propelling mechanisms and particularly to the type equipped with radially disposed plungers. My present invention relates to the type of plunger pump shown in my co-pending application, Serial No. 430,867, filed February 24, 1930, but differs therefrom in certain structural characteristics.

One of the outstanding features of the present invention, as well as the invention set forth in my above mentioned co-pending application, which distinguishes these inventions from pumps employed heretofore, is the provision of a stationary means or support for retaining a plurality of radially reciprocable pistons, and also the provision of a tapered, rotary valve for controlling the passage of fluid toward and away from said pistons. The present invention contemplates among other things the provision of novel and practical means for effecting the reciprocation of the radially disposed pistons.

More specifically, it is an object of my present invention to provide a rotary driving means having an annulus or ring mounted on anti-friction bearings, the inner extremities of the radial pistons being adapted to bear directly against the outer surface of said ring.

It is also an object of my present invention to provide a new and practical arrangement, whereby theabove mentioned driving ring may be laterally shifted so as to vary the stroke imparted to the pistons.

The invention also contemplates the provision of rotary driving means which is adapted to be completely housed and shielded within the pump casing, and which is further adapted to be externally connected with a source of power supply.

In addition to the above mentioned advantageous structural characteristics, it is an object of my invention to provide a simple and conveniently operable adjusting mechanism positioned centrally of a rotary driving means, said adjusting mechanism being eccentrically coupled at its inner extremity with a laterally shiftable driving member.

The foregoing and other objects and advantages will be more apparent from the following detailed description when considered in connection with the accompanying drawings, wherein Figure 1 is a central vertical sectional view taken longitudinally of a pumping mechanism which represents one embodiment of my invention;

Figure 2 is a transverse vertical sectional-view of the mechanism shown in Figure 1, said view being taken substantially along the line 2 -2 of Figure 1;

Figure 3 is also a transverse sectional viewv taken substantially along the line 33 of Figure 1;

Figure 4 is a plan View of the mechanism in Figure 1, a portion of said mechanism being shown in section for the purpose of more clearly illustrating the structural arrangement of parts 0 journal of the rotary driving mechanism, Figure 20 8 disclosing the rotatable adjusting member, and Figure 9 disclosing the eccentrically adjustable member of said driving mechanism.

Referring now to the drawings more in detail,

wherein like numerals have been employed to 25 designate similar parts throughout the various figures, it will be seen that one embodiment of my invention includes a cylinder block or stator ID. This stator l0 comprises a bearing section I2 and a housing or flared section I4. This en- 30 larged annular section I4 is provided with a plurality of radial chambers l6 for receiving complementary pistons or plungers l8. At the outer extremity of each of the chambers I6 I provide a threaded plug 20. The section of the chamber 35 I6 interposed between the outer end of each-piston I8 and its companion plug 20 is designated by the numeral 22, and this chamber section- 22 communicates with a rotary tapered valve 24' through the agency of passageways 26 provided 40 within the stator Ill.

The tapered valve 24 is rotatably mounted within a suitable tapered bushing or bearing 28, and is secured against longitudinal displacement by means of an anti-friction bearing 30 and an adjustable abutment screw 32 which is mounted within an end casing section 34. Fluid from a suitable outside sourcenot shown) is directed through a pipe 35, Figure 1, into a chamber 38 within the end casing 34, and from this point is 50 conducted through a passageway 40 in the valve 24 to a valve port 36. This peripheral valve port 36 is adapted to successively register or communicate with the passageways 26 during the intake stroke of the pistons 18, while a peripheral valve port'42 serves to communicate with the passageways 26 during the compressing stroke of said pistons. Thus, the peripheral ports 42 direct the fluid from the passageways 26 through a .valve passage44 and thence to an annular valve port 46, which communicates with a pipe line 48, Figure 1.

The tapered construction of the valve is such as to positively prevent leakage and slippage of fluid longitudinally thereof, and for a more detailed description of the functional and structural characteristics of this rotary valve, reference is again made to the description given in my above mentioned co-pending application.

Attention is now directed to the mechanism which is adapted to impart reciprocation to the pistons 18. The inner extremity of each piston I8 is provided with an enlarged section or head [8a, which is adapted to bear against the smooth peripheral surface of a driving ring or annulus 50. This ring 56 is supported by an anti-friction bearing 52, which bearing is in turn carried by and rotatable with a laterally adjustable driving member designated generally by the numeral 54, Figures 1 and 9. The driving member 54 is provided with a tongue 56 which is received by a complementary groove 56a in the valve 24, Figure 4. The bearing 52 and ring 50 are secured against longitudinal displacement upon the adjustable driving member 54 by means of a suit-' able threaded clamping ring 58 Figure 1.

From the foregoing it will be apparent that rotation of the driving member 54 will cause rotation of the valve 24. If the axis of rotation of the driving member 54 is coincident with the axis of rotation of the valve 24, no movement will be imparted to the pistons 3 by the driving ring 50. However, if the driving member 54 is laterally shifted to the position shown in Figures 1 to 4 inclusive, the ring 50 will be eccentrically positioned with respect to the axis of rotation of the valve 24, and obviously said ring will cause outward movement of the pistons as said ring is swept through its orbit. By means about to be described I am able to accurately and conveniently control the eccentric positioning of the driving ring so as to vary at will the stroke of the pistons.

The driving member 54 just described is provided with a T-shaped section, which includes an enlarged section 60 and a reduced section 62, Figure 9. These sections are adapted to be received by companion slots or openings 60a and 62a provided in a rotary sleeve or journal, which I have designatedgenerally by the numeral 64, Figure 7. Thus, the driving member 54 is laterally shiftable with respect to the driving sleeve 64 through the agency of this T-slot arrangement.

The

' driving sleeve 64 is mounted upon a pair of spaced

anti-friction bearings

66 and 68. These bearings are, in turn, mounted within a casing 18, which forms a continuation of the section l4 of the stator and is secured thereto by.means of suitable bolts I2, Figures 1 and 3 A section 14 of the sleeve 64 is mounted within the bearing 66, and a longitudinal cylindrical section 16 is mounted within the bearing 68, Figure 1. An annular cover plate 18 is secured against the end surface of the casing 18 by means of suitable bolts 80.

I provide means for effecting the lateral shifting of the driving member 54, and this means includes an elongated member 82, Figures 1 and 8, which is provided with an enlarged cylindrical section 84 and a reduced cylindrical section 86 having a square extremity 88 for receiving a,

tation is imparted to the adjusting member 82 I asby means of the application of a wrench to the square end thereof, the driving member 54 will be shifted laterally with respect to the axis of rotation of the sleeve 16. In other words, the rotary movement of the adjusting member 82 will serve to effect the eccentric positioning of the driving ring 50 so as to correspondingly effect a variation in the stroke of the pistons l8. To secure the member 82 in its various positions of adjustment, I provide a threaded clamping sleeve 92 which is adapted at its inner extremity to bear against the shoulder of the enlarged cylindrical section 84, Figure 1. To facilitate the turning of the clamping sleeve 92, I provide apertures 94 for receiving complementary tongues of a wrench (not shown).

The sleeve 16 of the driving mechanism is adapted to be driven from any suitable source of power supply (not shown). A gear 96 which is keyed to the sleeve 76, Figure 1, is secured against longitudinal displacement by means of a clamping ring 98. Power from said source of supply may be transmitted to this gear for imparting rotation to the driving mechanism.

Bymeans of the tongue and groove connection between the driving member 54 and the valve 24, I am able to eliminate side thrust from being imparted to said valve. It will be seen that the tongue 56 extends transversely of the driving member 54 in parallelism with the

sections

68 and 62, Figure 9. The centrifugal force experienced by the driving member 54 obviously acts in a direction parallel to the direction in which said driving member is'shifted within the sleeve 64. Hence, any centrifugal force experienced by the tongue 56 will act in a direction longitudinally of said tongue and not transversely thereof. Thus, by having the tongue shiftable within the complementary groove 56a, as above described, no centrifugal force will be imparted to the valve.

Thus, it is apparent that my invention contemplates the provision of a plunger pump which is of extremely simple and practical design. The pistons I8 may be conveniently removed whenever the occasion demands by simply unscrewing the bolts 12, thereby enabling the entire driving mechanism including the driving ring 50 to be removed from the stator. The pistons are of very simple construction and require no auxiliary means for securing them in place or for causing them to reciprocate. The described adjusting mechanism provides a very convenient and positive means for accurately positioning the driving ring. The parts constituting the driving mechanism, as well as the adjusting mechanism associated therewith, are of extremely simple construction, and may be economically manufactured by the practice of conventional machine shop methods. By having the casing completely encircling the sleeve 64 and its associated parts, a very compact and rigid construction is presented which positively prevents the introduction of any foreign matter within the chamber of the casing. The sleeve 76 is provided with very convenient means for coupling it with a source of power supply, and it will be noted that the gear 96 is positioned wholly outside of the casinglfi. In order to effect accurate and positive shifting of the driving means, it is onlynecessary to arrest rotation of the driving mechanism, slightly loosen the clamping sleeve 92, and then impart the desired degree of rotation to the adjusting member 82.

From the foregoing description it will be apparent that my invention is adaptable in connection with the propulsion of a fluid which is used as a propelling medium. It should also be understood that my invention is not limited to fluid propelling devices or pumps, and that the principle of operation and construction is adaptable for use as a fluid motor. In other words, if the pistons were employed to actuate a central driving member, the invention could be very effectively employed.

While I have disclosed a specific construction for the purpose of clearly describing one practical embodiment of my invention, it should be understood that the invention is by no means limited to the particular structure disclosed, but iscapable of other modifications and changes without departing from the spirit and scope thereof.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In combination with a plurality of shiftable follower elements, a rotary driving mechanism including a rotary member associated with said follower elements, means for rotatably supporting said member, a second recessed member rotatable with said first member and movable laterally thereof, adjusting means rotatably mounted within said first member and having an eccentrically positioned projection extending into the recess of said second member, whereby said second member will be shifted laterally with respect to said first member in response to rotation imparted to said adjusting means, and means r0- tatable with said first mentioned rotary member and adapted to secure said adjusting means and first mentioned rotary member together as a rotary unit, thereby maintaining said projection in the desired eccentric position.

2. In combination with a plurality of shiftable follower elements, a rotary driving mechanism including a rotary member associated with said follower elements, means for rotatably supporting said member, a second member rotatable with said first member and movable laterally thereof, said second member being provided with a transverse recess, adjusting means rotatably mounted within said first rotary member and having an eccentric projection extending into the recess of said second member, whereby said second member will be shifted laterally with respect to the first member in response to rotation imparted to said adjusting means, and means rotatable with said first mentioned rotary member and adapted to secure said adjusting means and first mentioned rotary member together as a rotary unit, thereby maintaining said projection in the desired eccentric position.

3. In combination with a plurality of shiftable follower elements, a rotary .driving mechanism including a rotary member associated with said follower elements, means for rotatably supporting said member, a second member rotatable with said first member and movable laterally thereof, a shaft rotatablysupported Within the first rotary member, the inner extremity of said shaft having an eccentric projection for engaging the second member and the outer extremity of said shaft being adapted to receive a suitable turning means for imparting movement to said shaft relative to the first mentioned rotary member, whereby lateral movement may be imparted to said second member and clamping means rotatable with said first rotary member and adapted to clampingly engage said shaft and thereby secure said shaft and said first rotary member together as a rotary unit, thus maintaining said projection in the desired eccentric position.

4. In combination with a plurality of shiftable follower elements, a rotary driving mechanism including a rotary member associated with said follower elements, means for rotatably supporting said member, a second member rotatable with said first member and movable laterally thereof, a shaft rotatably supported within the first rotary member, the inner extremity of said shaft having an eccentric projection for engaging the second member and the outer extremity of said shaft being adapted to receive a suitable turning means for imparting movement to said shaft relative to the first mentioned rotary member, where-v by lateral movement may be imparted to said second member, and means rotatable with said first rotary member for securing the shaft in various fixed positions of rotary adjustment with respect to said first mentioned rotary member and thereby maintain said projection in the desired eccentric position.

5. In combination with a plurality of reciprocable follower elements, an eccentric driving mechanism therefor including a rotary driving member provided with a recess completely traversing same, a second member rotatable with said driving member and slidably mountedwithin said transverse recess, means relatively rotatable with respect to said driving member and interlocking with the member slidably carried thereby for effecting transverse adjustment of said second member, and means carried within and rotatable with said first rotary member and adapted for securing said rotary adjusting means and said first rotary member together as a rotary unit, thereby maintaining said second rotatable member in the desired position of adjustment.

6. In combination with a plurality of shiftable follower elements, a rotary driving mechanism insaid follower elements, a second member rotatable with said first member and shiftable with respect thereto, adjusting means rotatably mounted within said first member and having an eccentrically positioned projection extending into operative engagement with the second member, whereby said second member will be shifted with respect to said first member in response to rotation imparted to said adjusting means, and means rotatable with said first mentioned rotary member and adapted to secure said adjusting means and first mentioned rotary member together as a rotary unit, thereby maintaining said projection in the desired position.

'7. In combination with a plurality of shiftable follower elements, a rotary driving mechanism including a first rotary member associated with said follower elements, a second apertured member rotatable with said first member and adjustable eccentrically thereof, adjusting means rotatably mounted within said first member and having an eccentrically positioned projection extending into the aperture of said secondmember, whereby said second member will be shifted eccentrically with respect to said first member in response to rotation imparted to said adjusting cluding a first rotary member associated with.

means, and means rotatable with said first mentioned rotary member and adapted to secure said adjusting means and first mentioned rotary member together as a rotary unit, thereby maintaining said projection in the desired eccentric position. I

8. In combination with a plurality of shiftable follower elements, a rotary driving mechanism for causing uniform speed variation of said follower elements including a first rotary member associated with said follower elements, a second member rotatable with said first member and shiftable with respect thereto to vary the stroke of the follower elements without affecting the uniform speed variation thereof, adjusting means rotatably mounted within said first member and having an eccentrically positioned projection extending into operative engagement with the second member, whereby said second member will be shifted with respect to said first member in response to rotation imparted to said adjusting means, and means rotatable with said first mentioned rotary member and adapted to secure said adjusting means and first mentioned rotary member together as a rotary unit, thereby maintaining said projection in the desired position.

9. In combination with a plurality of shiftable follower elements, a rotary driving mechanism for imparting uniform speed variation to said follower elements including a first rotary member, a second member rotatable with said first member and movable laterally thereof, adjusting means rotatably mounted within said first rotary member and having an eccentric projection extending into operative engagement with the second member, whereby said second member will be shifted laterally with respect to the first member in response to rotation imparted to said adjusting means, and means rotatable with said first mentioned rotary member and adapted to secure said adjusting means and first mentioned rotary member together as a rotary unit, thereby maintaining said projection in the desired eccen tric position.

10. In combination with a plurality of shiftable follower elements, a rotary driving mechanism for imparting uniform speed variation to said follower elements including a first rotary member, a second member rotatable with said first member and movable eccentrically thereof, said second member-being provided with an opening, adjusting means rotatably mounted within said first rotary member and having an eccentric projection extending into the opening of said second member, whereby said second member will be shifted eccentrically with respect to the first member in response to rotation imparted to said adjusting means, and means rotatable with said ber, a second member rotatable with said first member and adjustable with respect thereto, a shaft rotatably supported within the first rotary member, the inner extremity of said shaft having an eccentric projection for engaging the second member and the outer extremity of said shaft being adapted to receive a suitable turning means for imparting movement to said shaft relative to the first mentioned rotary member, wherebyradjustable movement may be imparted to said second member, and clamping means rotatable with said first rotary member and adapted to clampingly engage said shaft and thereby secure said shaft and said first rotary member together as a rotary unit, thus maintaining said projection in the desired eccentric position.

12. In combination with a plurality of reciprocable follower elements, an eccentric driving mechanism for imparting uniform speed variation to said follower elements including a rotary driving member, a second member rotatably supported by said driving mechanism, means rela tively rotatable with respect to said driving member and interlocking with the second member for effecting adjustment of said second member, and means rotatable with saidfirst rotary member and adapted for securing said rotary adjusting means and said first rotary member together as a rotary unit, thereby maintaining said second rotatable member in the desired position of adjustment.

13. In combination with a plurality of reciprocable follower elements, an eccentric driving mechanism for imparting uniform speed variation to said follower elements including a rotary driving member, a second member rotatably supported by said driving mechanism and transversely adjustable with respect to the driving member, means relatively rotatable with respect to said driving member and interlocking with the second member for effecting transverse adjustment of said second member, and means rotatable with said first rotary member and adapted for securing said rotary adjusting means and said first rotary member together as a rotary unit, thereby maintaining said second rotatable member in the desired position of adjustment.

ERNEST J. SVENSON.