US3216365A

US3216365A - Reciprocating pump

Info

Publication number: US3216365A
Application number: US296508A
Authority: US
Inventors: Dettinger Willi; Joos Josef
Original assignee: Pumpenfabrik Urach GmbH
Current assignee: Pumpenfabrik Urach GmbH
Priority date: 1962-07-26
Filing date: 1963-07-22
Publication date: 1965-11-09
Anticipated expiration: 1982-11-09
Also published as: DE1296007B; GB996280A

Description

1965 w. DETTINGER ETAL 3,216,365

RECIPROCATING PUMP Filed July 22, 1963 3 Sheets-Sheet 2 FIGA ( INVENTORS WILL! .DETT/NGEE AUGUST WEHMEIE'E 'JOSEF' (1008 Nov. 9, 1965 w. DETTINGER ETAL RECIPROCATING PUMP Filed July 22, 1963 FIG.5

S Sheets-Sheet 3 INVENTORS WILL! .DETTINGEK AUGUST WEHMEIER JOSEF' JOOS United States Patent 3,216,365 RECIPROCATING PUMP Willi Dettinger, August Wehmeier, and Josef Joos, Uracil, Wurttemberg, Germany, assignors to Pumpenfabrik Urach, Urach, Wurttemberg, Germany Filed July 22, 1963, Ser. No. 296,508 Claims priority, application Germany, July 26, 1962, P 29,907 15 Claims. (Cl. 103-153) The invention relates to a reciprocating pump, and more particularly but not exclusively to a multi-cylinder high-pressure reciprocating pump, for pumping for example chemical or other fluids (i.e. liquids or gases) under high pressures (e.g. 583 to 2859 p.s.i.), or at high temperatures (cg. 100 to 250 C. in the case of feed water for steam boilers).

One object of the invention is to provide a construction of a reciprocating pump which facilitates the problem of pump overhaul.

According to the invention there is provided a reciprocating pump for a fluid, including a main housing and a cylinder housing block detachably connected thereto, a pumping plunger which is reciprocable in a pumping chamber in said cylinder housing block, said cylinder housing block having formed therein a fluid inlet orifice and a fluid outlet orifice for said pumping chamber and registering respectively with a fluid supply orifice and a fluid delivery orifice in said main housing.

With such a pump, by detaching the cylinder housing block from said main housing, the fluid supply and delivery ducts to the cylinder housing block are disconnected and there is no need separately to un-conple fluid supply and delivery connections to the cylinder housing block.

The invention will be further described, by way of example, with reference to the accompanying drawings in which:

FIG. 1 is a diagrammatic side view of a high pressure reciprocating pump;

FIG. 2 is an axial cross-section of part of the pump of FIG. 1,

FIG. 3 shows on the left hand side a cross section of a manifold block taken on the line 33 of FIG. 2, and shows on the right hand side an end view of the manifold block looking from left to right in FIG. 2,

FIG. 4 is a partial top view of the pump; and FIG. 5 is a partially sectioned side view of a modification of the pump according to the invention.

The pump of FIG. 1 comprises a drive housing block 10, serving inter alia to mount the crank shaft, three cylinder housing blocks 11 (only one of which is shown in FIG. 1) each cylinder housing block being integrally formed and consisting of a cylinder 11a and a cylinder head 11b, and a manifold block 12, the

blocks

10, 11 and 12 being inter-connected as hereinafter described. The drive housing block 10, which may be in one or several parts and may be mounted on firm foundations, serves to support the other blocks, and contains in addition to the crankshaft, three reciprocating crossheads, corresponding to the number of cylinders 11a, and actuated from the crankshaft by connecting rods or the like, one of the cross-heads being shown partly at 13 in FIG. 2. A chamber 14 (ie an antechamber), which is accessible through the open top side thereof, separates the part a in which the cross-heads are located from the part 1012 of the drive housing block 10, to which the manifold block 12 is connected.

The part 1011 of the drive housing block 10 has three bores 15, each of which is located axially relative to a respective cross-head 13. Each bore 15 receives within the inner cylindrical surface 16 thereof, a respective one of the cylinders 11a. Each cylinder 11a has two cylindrical sealing surfaces 17 and 18, forming a contlnuatlor of the cylindrical surface 16, over which the manifold block 12 is fitted by means of corresponding cylindrical bores 17a and 18a. These last mentioned bores may be made, for example, together with the bores 15, Whilst the manifold block 12 is mounted on the drive housing block 10. Conveniently, the cylindrical surfaces 18, 18a have a slightly larger diameter than the cylindrical surfaces 17, 17a in order to facilitate the extraction of each cylinder 11a from the manifold block 12, and to make this extraction possible even if deposits of scale have been formed on the cylindrical surfaces 17a. Sealing rings 19 and 20 seal a cooling water chamber 12a which is formed between each cylinder 11a and the manifold block 12.

Furthermore, the part 10b has a sealing surface 21 which is exactly perpendicular to the axes of the cylinders 11a, and which is engaged by a complementary surface of the manifold block 12. Each cylinder head 11b projects radially outwardly from the associated cylinder 11a, and has a sealing surface 22 which is planar and parallel to the sealing surface 21, and which abuts a complementary surface 22a of the manifold block 12.

The manifold block 12 is connected to the block 10 by screws 23 (e.g. socket head cap screws) the heads 23a of the screws 23 lying in countersunk recesses formed in the block 12 so that they do not protrude outwardly of the surface 22a. The cylinder housing blocks 11 are connected to the block 12 individually by

screws

24, 24a.

Each cylinder 11a contains a plunger 25, which is sealed against the cylinder 11a by a stufling box seal comprising sealing sleeves 27, the latter being compressed by a screw 26. Each plunger is connected to the respective cross head 13 by a detachable, laterally adjustable coupling 28 in order to take up manufacturing tolerances. Thus the plunger 25 shown in FIG. 2 has an extension 29 with a flange 30 which abuts a slide 31, the latter holding a twopart sleeve or bush 33, in engagement with an annular groove 32 formed in the extension 29. Plate springs 34 are compressed between the two-part bush 33 and a screwed bush 35 inserted into a bore of the cross-head 13.

Each cylinder head 11!) contains an intake valve 36 in a valve housing insert 37, and a delivery valve 38 in a valve housing insert 39, these

inserts

37 and 39 being mounted in a vertical bore 40 of the cylinder head 11b. The interior of each

insert

37, 39 communicates with the pumping chamber 41 of the plunger 25.

The intake valve 36 controls the intake or suction duct 42, which terminates in an orifice 43 at the sealing face 22 of the cylinder head 11b. The orifice 43 registers with an orifice which is formed in the surface 22a. and which leads to a suction duct 44 in the manifold block 12, the joint being sealed peripherally by a sealing ring 45.

The delivery valve 38 leads through bores in the valve housing insert 39 to an annular chamber 46 which communicates with an orifice bore 47 leading to the sealing face 22 of the cylinder head 11b. The orifice 47 registers with a further orifice which is formed in the surface 22a and which leads to a delivery duct 48 for the pressurized fluid medium, the joint being sealed peripherally by a sealing ring 49. The delivery duct 48 has a smaller crosssection than the intake duct 44, and both ducts extend normal to the axis of each cylinder 11a and, as shown clearly in FIG. 3, both ducts extend across the whole row of the three cylinders 11a.

For reasons of accessibility, the screws 24 are fitted from the right in FIG. 2, whilst the screws 24a are fitted from the left on the upper side of the pump.

The coupling 28 is easily accessible from the open upper side of the chamber 14 (which side may be closed by a removable cover as shown in FIG. 2), so that each .unger 25 may be easily separated from the respective 'oss-head 13.

As may be seen, each cylinder housing block 11 and 1e associated plunger may be removed together from the ump after removing the

respective screws

24 and 24a, nd after uncoupling the respective coup-ling 28. The :moved assembly will include the seal 26, 27, and the

alves

37, 38, and can be immediately replaced by an exhange unit. The seal 26, 27 may then be removed from 1e detached unit after extracting the plunger 25, and a ew seal can be fitted. The

valves

36, 38 may be reround or replaced by new ones. Also the plunger may e replaced or repaired. Furthermore, the sealing rings 9, 20 can be replaced.

New sealing rings

45, 49 can be tted before the exchange unit is secured to the pump.

Normally the replacement of a cylinder housing block .1 and associated plunger 25 will be effected after ex- =:rnal valves (not shown) located in the intake and deivery pipes leading respectively to and from the pump rave been closed. The fact that the intake and delivery iipes are directly connected to the manifold block 12 and lot to cylinder housing blocks 11 enables quick removal .nd replacement of each cylinder housing block and as- .ociated plunger. Thus the pump need only be inoperaive for a short time, which can be of great importance [1 the case of pumps which are used for feeding water to team boilers, or in the case of pumps which one used in he chemical industry in connection with carrying out :ontinuous chemical processes. It will be seen that when 1. cylinder housing block and associated pump are being 'eplaced, there is virtually no risk that the fluid medium aeing pumped will enter the chamber 14. Furthermore t will be seen that the overhaul of a removed cylinder lousing block and associated plunger can be effected with- )ut urgency, so that due care can be taken to ensure that ;he seal 27 is arranged and operates precisely as desired.

The pump which has been described can be modified 9y fitting an annular heating or cooling plate in the joint Jetween the sealing

faces

22, 22a. As shown in FIG. the plate 50 is sandwiched between the sealing surfaces of the cylinder head portion 11b and that of the main housing 11; it is provided with

orifices

42a and 47a therethrough which respectively establish communication between the fluid supply orifice and the fluid inlet orifice on the one hand, and between the fluid outlet orifice and the fluid delivery orifice on the other. Plate 50 is further provided with a passage 51 in which heating means, such as for instance an electrical heating spiral 52, may be located. Such a heating plate may be used with media e. g. tar-which are highly viscous or even solid at ordinary room temperature. Of course it is also possible to use the plate for cooling purposes, in which case it is merely necessary to provide a cooling means-e.g. an electric cooling means or a cooling fluidinstead of the heating means. The heating or cooling by such a heating or cooling plate is particularly effective, because the plate is located close to the pumping chamber 41, and the medium being pumped flows in contact with the plate. The cylinder 11a and the plunger 25 have a longer configuration in these constructions to allow for the additional thickness of the plate.

We claim:

1. A reciprocating pump for a fluid, including a main housing with a bore extending therethrough, a cylinder housing block comprising a hollow cylinder portion and a hollow cylinder head portion, said cylinder portion extending within and being located by said bore, and said cylinder head portion extending radially outwardly of said cylinder portion, said cylinder head portion and said main housing having complementary co-operating sealing surfaces, detachable connecting means securing said cylinder housing block to said main housing and holding said sealing surfaces in co-operating relationship, a pumping plunger which is reciprocable in sealing relationship within said cylinder portion, said plunger having an end face facing said cylinder head portion, a pumping chamber in said cylinder housing block, said pumping chamber being in part defined by said end face of said plunger, a fluid inlet orifice and a fluid outlet orifice in said cylinder head portion for said pumping chamber, said fluid inlet and outlet orifices extending from said sealing surface of said cylinder portion, a fluid supply orifice and a fluid delivery orifice in said main housing and extending from said sealing surface thereof, said fluid supply orifice registering and communicating with said fluid inlet orifice, and said fluid outlet orifice registering and communicating with said fluid delivery orifice.

2. A pump as claimed in claim 1 in which said sealing surfaces extend at right angles to the reciprocating axis of said plunger.

3. A pump as claimed in claim 1 in which said cylinder head portion incorporates a one-way inlet valve and a one-way outlet valve, said inlet valve controlling communication in one direction from said fluid inlet orifice to said pumping chamber, and said outlet valve controlling communication in one direction from said pumping chamber to said fluid outlet orifice.

4. A pump as claimed in claim 1 including a heat transfer plate sandwiched between said sealing surfaces, said plate having ports extending therethrough and establishing communication respectively between said fluid supply orifice and said fluid inlet orifice, and between said fluid outlet orifice and said fluid delivery orifice.

5. A reciprocating pump for a fluid, comprising a main housing consisting of a drive housing block and a manifold block, said manifold block being connected to said drive housing block, drive means supported by said drive housing block, said drive housing block and said manifold block defining successive axial sections of a bore extending therethrough, a cylinder housing block comprising a hollow cylinder portion and a hollow cylinder head portion, said cylinder portion extending within and being located by said bore, and said cylinder head portion extending radially outwardly of said cylinder portion, said cylinder head portion and said manifold block having complementary sealing surfaces, detachable connecting means securing said cylinder housing block to said manifold block and holding said sealing surfaces in co-operating relationship, said manifold block being located between said drive housing block and said cylinder head portion, a pumping plunger which is reciprocable by said drive means in sealing relationship within said cylinder portion, said plunger having an end face facing said cylinder head portion, a pumping chamber in said cylinder housing block, said pumping chamber being in part defined by said end face of said plunger, a fluid inlet orifice and a fluid outlet orifice in said cylinder head portion for said pumping chamber, said fluid inlet and outlet orifices extending from said sealing surface of said cylinder portion, a fluid supply orifice and a fluid delivery orifice in said main housing and extending from said sealing surface thereof, said fluid supply orifice registering and communicating with said fluid inlet orifice, and said fluid outlet orifice registering and communicating with said fluid delivery orifice.

6. A pump as claimed in claim 5 in which said manifold block and said cylinder portion define ther-ebetween a coolant passage.

7. A pump as claimed in claim 5 in which said manifold block and said drive housing block have complementary co-operating sealing surfaces.

8. A pump as claimed in claim 5 in which said cylinder head portion incorporates a one-way inlet valve and a one-way outlet valve, said inlet and outlet valves being vertically aligned, said inlet valve controlling communication in one direction from said fluid inlet orifice to said pumping chamber, and said outlet valve controlling communication in one direction from said pumping chamber to said fluid outlet orifice, said cylinder head portion having an opening in the upper end thereof through which said inlet and outlet valves are accessible, removable closure means closing said opening, said detachable connecting means including horizontal .bolts which extend through said manifold block and are screwed into the upper end of said cylinder head portion.

9. A reciprocating pump for a fluid, comprising a main housing consisting of a drive housing block and a manifold block, said manifold block being connected to said drive housing block, drive means supported by said drive housing block, said drive housing block and said manifold block defining successive axial sections of at least two horizontal bores extending therethrough co-extensively and in the same horizontal plane, a plurality of cylinder housing blocks corresponding to the number of said bores, each cylinder housing block comprising a hollow cylinder portion and a hollow cylinder head portion, each said cylinder portion extending within and being located by a respective one of said bores, each said cylinder head portion extending radially outwardly of the associated cylinder portion, and each said cylinder head portion and said manifold block having complementary sealing surfaces, detachable connecting means securing each said cylinder housing .block to said manifold block and holding said sealing surfaces in co-operating relationship, whereby said cylinder housing blocks are disposed in a horizontal bank, said manifold block being located between said drive housing block and said cylinder head portions, a plurality of pumping plungers corresponding to the number of cylinder portions, each pumping plunger being reciprocable by said drive means in sealing relationship within a respective one of said cylinder portions and each plunger having an end face facing the respective cylinder head portion, a pumping chamber in each said cylinder housing block, said pumping chamber being in part defined by the end face of the associated plunger, each cylinder head portion having therein a fluid inlet orifice and a fluid outlet orifice for the associated pumping chamber and extending from said sealing surface of that cylinder head portion, said manifold block having therein a plurality of fluid supply orifices and a plurality of fluid delivery orifices, said fluid supply and delivery orifices extending from said sealing surface of said manifold block, said fluid supply orifices corresponding in number and registering and communicating with said fluid inlet orifices, and said fluid delivery orifices corresponding in number and registering and communicating with said fluid outlet orifices, said manifold block defining internally thereof a common supply duct and a common delivery duct, all said fluid supply orifices communicating with said common supply duct, and all said fluid delivery orifices communicating with said common delivery duct.

10. A pump as claimed in claim 9 in which said common supply duct and said common delivery duct extend horizontally and at right angles transversely to said bores,

11. A pump as claimed in claim 10 in which s2 common supply duct is located below said bores, and s2 common delivery duct is located above said bores.

12. A pump as claimed in claim 9 in which sa common supply duct has a greater cross section than sa common delivery duct.

13. A reciprocating pump for a fluid, including a ma housing with a bore extending therethrough, a cylind housing block comprising a hollow cylinder portion a1 a hollow cylinder head portion, said cylinder portion e tending Within and being located by said bore and sa cylinder head portion extending radially outwardly of sa cylinder portion, said cylinder head portion and said ma housing having complementary cooperating sealing su faces, detachable connecting means securing said cylind' housing block to said main housing and holding sa sealing surfaces in cooperating relationship, a pumpir plunger reciprocable in sealing relationship within sa cylinder portion, said plunger having an end face facir said cylinder head portion, a pumping chamber in sa: cylinder housing block, said pumping chamber being 1 part defined by said end face of said plunger, at least or fluid orifice in said cylinder head portion for said pumpir chamber, said fluid orifice extending from said sealir surface of said cylinder portion, at least one addition: fluid orifice in said main housing and extending from sai sealing surface thereof and registering with said first mer tioned fluid orifice.

14. A pump as claimed in claim 13 in which said sea ing surfaces extend transversely to the axis of said plunge:

15. A pump as claimed in claim 13 and including sea ing means in said hollow cylinder portion surrounding sai plunger, drive means supported by said main housing, dis connectable coupling means connecting said drive mean to said plunger, said main housing defining an open-side chamber in which said coupling means are accessibl located in such a manner that when said coupling mean and said detachable connecting means are disconnecte the cylinder housing block together with said plunger an said sealing means may be removed as a unit from th main housing.

References Cited by the Examiner UNITED STATES PATENTS 2,239,853 4/41 Louree 103-169 2,733,664 2/56 Saalfrank 10315E 2,771,037 11/56 Johnston 103l52 2,795,191 6/57 Seter 103-153 )1 DONLEY J. STOCKING, Primary Examiner.

WARREN E. COLEMAN, LAURENCE V. EFNER Examiners,

Claims

1. A RECIPROCATING PUMP FOR A FLUID, INCLUDING A MAIN HOUSING WITH A BORE EXTENDING THERETHROUGH, A CYLINDER HOUSING BLOCK COMPRISING A HOLLOW CYLINDER PORTION AND A HOLLOW CYLINDER HEAD PORTION, SAID CYLINDER PORTION EXTENDING WITHIN AND BEING LOCATED BY SAID BORE, AND SAID CYLINDER HEAD PORTION EXTENDING RADIALLY OUTWARDLY OF SAID CYLINDER PORTION, SAID CYLINDER HEAD PORTION AND SAID MAIN HOUSING HAVING COMPLEMENTARY CO-OPERATING SEALING SURFACES, DETECHABLE CONNECTING MEANS SECURING SAID CYLINDER HOUSING BLOCK TO SAID MAIN HOUSING AND HOLDING SAID SEALING SURFACES IN CO-OPERATING RELATIONSHIP, A PUMP PLUNGER WHICH IS RECIPROCABLE IN SEALING RELATIONSHIP WITHIN SAID CYLINDER PORTION, SAID PLUNGER HAVING AN AND FACE FACING SAID CYLINDER HOUSING BLOCK, SAID PUMPING CHAMBER IN SAID CYLINDER HOUSING BLOCK, SAID PUMPING CHAMBER BEING IN PART DEFINED BY SAID END FACE OF SAID PLUNGER, A FLUID INLET ORIFICE AND A FLUID OUTLET ORIFICE IN SAID CYLINDER HEAD PORTION FOR SAID PUMPING CHAMBER, SAID FLUID INLET AND OUTLET ORIFICES EXTENDING FROM SAID SEALING SURFACE OF SAID CYLINDER PORTION, A FLUID SUPPLY ORIFICE AND A FLUID DELIVERY ORIFICE IN SAID MAIN HOUSING AND EXTENDING FROM SAID SEALING SURFACE THEREOF, SAID FLUID SUPPLY ORIFICE REGISTERING AND COMMUNICATING WITH SAID FLUID INLET ORIFICE, AND SAID FLUID OUTLET ORIFICE REGISTERING AND COMMUNICATING WITH SAID FLUID DELIVERY ORIFICE.