US2892584A - Vane-type rotary pumps - Google Patents

Description

June 30, 1959 E. S. BRISCOE VANE-TYPE ROTARY PUMPS 4 Sheets-Sheet 1 Filed June 27, 1955 FIG-.4

FIG-.1

INVENTOR Emanuel 5- Emiscue E. S. BRISCOE VANEZ-TYPE ROTARY PUMPS June 30, 1959 4 Sheets-Sheet 2 Filed June 27, 1955 FIG-.5

INVENTOR Emanuel EIT'iEEDE June 30, 1959 E. s. BRISCOE 2,892,584

VANE-TYPE ROTARY PUMPS Filed June 27, 1955 4 Sheets-Sheet s FIG..7

PIC-3.11.

INVENTOR Emafiuet 5- El'riscme ATTORNEY;

June 30, 1959 E. s. BRISCOE 2, 9 ,58

VANE-TYPE ROTARY PUMPS Filed June 27, 1955 4 Sheet-Sheet 4 INVENTOR Emanuel E- E 1:15 EEIE A'Z'TORNEU United States Patent "ice 2,892,584

VANE-TYPE ROTARY "PUMPS Emanuel S. Briscoe, Oklahoma City, Okla.

Application June 27, -1955,-Serial"-No. 517,983

' ,9 Claim roman- 15 This-invention relates topumps-and more specificallyrto cooling, lubricating and sealing means for pumps such as, for example, reciprocating vane-type rotary pumps.

An important-object of the invention is to depart from the method and means for introducing a liquid medium .(as oil for cooling, lubricating and sealing) into a pump along with a fluid (as a gas, for refrigeration purposes) or as a mixture of liquid and gas mixed prior to introduction of the mixture into the pump, and employ, in- -stead, means for introducing the liquid into the pump independently of the introduction of .the fluid.

Another important object of the invention is to introduce a cooling, lubricating and sealing medium into a pump, through the shaft of the rotor thereof and conduct the .medium through the shaft and outwardly thereof to cool, for example, both of two widelyrspaced apartbushingszwhich provide bearings for the shaft.

Still another important object is to introduce-the cooling, lubricating and sealing medium into a pump byway of the shaft of the rotor lthereof and conduct 'it through the shaft in such a manner .that :the seal assembly, at the end .of the -pump housing where the shaft emerges therefrom, .will be cooled.

Additionally, another important object :is to provide for the introduction of a cooling, lubricating and sealing medium into a .pump by way of the shaft of the rotor thereof and .conduct the medium through the shaft from substantially .end to end thereof within the pump and then discharge the medium .exteriorly of the shaft for lubricating and sealing of portions thereof exteriorly of the shaft.

In addition, another important object :is :to provide for the introduction of acooling, lubricating and sealing me- ,glium into a pump by way of the .shaftof the rotor thereof and then conduct the medium through (the shaft, longia l d ltt zly the eo and :then out .of .the shaft and into and .out of the chamber .of v the pump containing the sealing assembly for the shaft, for cooling and lubricating that as emh y- Another important object is .to provide for the cooling, lubricating and sealing of the vane-type rotary pumps of refrigerating Systems, for example, brought about by introducing a pre cooled cooling, lubricating and sealing medium into the shaft ,of the pump rotor and conduct it rough the shaft, to cool the shaft bushings and then disgharge the medium by centrifugal force, along the yanes of the-pump to seal the spaces between the vanes :and the support therefor ,as -yyell as the spaces between the ends .pf {the van es and the wall of the stator chamber, as the r 1 aegii} .1 rn is thrown, ;by centrifugal force, outwardly of the rotor and against the wall ,of the stator chamber.

till another object is to provide a system for the introduction of a cooling, lubricating and sealing mediu-m t9 the rotor of a yane-type rotary pump in which the stapes reciprocate in recesses, as distinguished from slots, and {the ,medium further functions as cushioning means t thc va d PQ Qh i h h hh ir in e t-e 59th?! .tibiect and advantages .of the invention will be 1 Patented ,June 30, 1959 Fig. '2.

Fig. 2 is a longitudinal section of the pump of Fig. :1.

Fig. 3 is a fragmentary transverse section, substantially ontheline 3-3 of Fig. 2.

-Fig. 4 is a transverse section of a pump of a construction different from that of Figs. 1, 2 and '3 and embodying the invention. 7

Fig. 5 is a longitudinal section of the pump of'Fig. 4, taken substantially on the'line 5-5 of Fig. 4.

Fig. -6 is a transverse section of a pump of a construction different from those of Figs. '1 to '5 inclusive, and embodying the invention.

Fig. '7 is a -longitudinal section of the pump of Fig. 6, taken substantially on the line 77 of Fig. 6.

Fig. 8 is a transverse section of a pump differing from those of Figures 1 to 7 inclusive, and embodying Lthe invention.

Fig. 9 is a'longitudinal section of the pump of Fig. '8,

taken substantially on the line 9f9 of Fig. 8.

Fig. 10 is a plan of a bushing forming aportionojfthe pump ofFigs. 8 and 9.

Fig. 11 is a section of the bushing of Fig. l0, substan tially onthe line 1111 of "Fig. 'l O.

2 i a amm i win of on applica i n of ns 1 t Pump c ntai n h i ve o v. the d a wh n fo t Pu po e Qfiil h t aii h are h w 1 P mp embod in theihvent .aa wherein similar reference characters designate. 'correspon d ns p t t r h t e ve a i ws, the r ctte A, C and D designate generally the four pumps.

h p p o g 2 and 3 inc udes asta having a housing 15 provided .with suction or jin take jp ort whtamed Wi i t "hhathhg 21. 9 a 9 1 sail housing 25 T Y? .1CQd.4P.. wh ch has! can i provided with screw threads mating with the housing 15 atthe end thereof opposite the end wall 22.

Pivotally carried by the stator is a rotor having outer hollow shaft .P I iQH 30 n it resre ti s wh c are p fie s s a i an .e tsed van a r ri hollow .-,t the Shaft portions and provided with a plurality pf spaced-a art yane-receiving slots 33 extending from the hbllgw or the body portion 32 to the peripheryof the latterto slida r h re o ti back u anes 5 w c re adapted to abut each other at the center o f .th body portion. The flanged bushings 29 grid 2 end faces 86 and 37 respectively of the ,body pp 11-32 and are wi l spaced rt By W de s .hlsaut that the inner faces of the two bushings 2G and 21 are s acerl apart a Sh distance s h a shh n all clcvent ales the thickness of the wall of the bushing 2i),

the x m Shown isthe .mov ms t Q-f rotor is counterclockwise. 4 L Means 9 i Q d a l q d uch as hri ;ams l or mixtures oflubricating oils) to the rotor may be 'a' with for the flow of the liquid from the means 41) through a the rotor to that part of the shaft portion 31 within the chamber 24. This means includes the provision of a plurality of spaced-apart openings 46 in the shaft por tion 30 each communicating with a separate longitudinally extending way 47 extending through the shaft portion 30, body portion 32 and shaft portion 31 quite close to the outer peripheries of the shaft portions rather than, as in many cases, through the center of a shaft portion. From this specific part of the shaft portion 31, the liquid flows into the hollow 37 of the shaft portion 31 by way of a plurality of spaced-apart openings 43 in the shaft portion 31, with these openings 48 disposed very close to the outer end of the chamber 24, whereby the liquid must flow through the shaft portion 32 to empty into the hollow 37 in a zone very close to this outer end. This will afford a decided cooling of the seal chamber 24 and its seal assembly 23 as well as of the adjacent bushing 21 before it reaches the slots 33. Similarly, the liquid within the openings 46 and adjacent portions of the ways 4-7 tend to cool the bushing 20. In order to block flow of liquid into or from the hollow 34 at the end thereof adjacent the end wall 22, 1 provide an imperforate closure or partition wall 49 across the hollow 34, and in order to block the flow of liquid into the hollow 37 outwardly beyond the housing 25, I provide an imperforate closure, baffle or partition wall 50 across the hollow 37. Preferably, these are disposed close to the openings 46 and 48 whereby the liquid will be baflled and will quickly enter these openings after it begins to flow toward the wall 22.

The liquid entering the hollow 37 will then flow there through and to the hollow 34 in the body portion 32 whereupon it will tend to flow outwardly by centrifugal force along the slots 33, in the spaces between the surfaces thereof and the surfaces of the vanes 35 and provide seals so that the fluid within the chamber 18 will not be able to enter these spaces. Moreover the liquid finding its way to the chamber surface films it and provides a seal between the outer ends of the vanes and this surface. Liquid, in excess of that utilized in film forming is drawn out via the exhaust port 17 to be subsequently separated from the fluid and returned for use, as will be subsequently explained.

A small opening 51 in the bushing 21 and disposed at the low pressure side of the pump, provides for communication between the chambers 18 and 24 whereby there will be a flow of a volume of the contents of chamber 18 into and out of the chamber 24 to aid in cooling the adjacent bushing 21 as well as the seal assembly 23. The flow into and out of the chamber 24- is brought about by the fluctuations of the pressure on the lowpressure side of the pump, caused by fluctuation of the heat load upon an expansion coil or the like to which the pump may be connected.

Referring now to the form of the invention embodied in the pump B of Figures 4 and 5, wherein the vanes do not back up as in the pump A but are slidably retained in slots extending to the hollow of the hollow body portion of the rotor.

The pump B includes a stator substantially like that of the stator of the pump A, whereby a chamber 55 is provided, in the housing 56 with intake or suction port 57 and exhaust port 58, and there is a rotor or shaft seal assembly 59 within a chamber 643 closed by a cap-like seal housing 61, opposite an end wall 62 of the housing 56 and carried by an end cap 62 substantially similar to and attached like the end cap 26. Flanged bushings 63 and 64, substantially like the bushings 20 and 21 are also preferably provided.

As for the rotor of the pump B, there are outer hollow shaft portions 65 and 66, preferably integrally connected to an intermediate hollow body portion 67 with the latter provided with a plurality of spaced-apart vane-receiving apertures 68 which may be slots extending from the hollow 69 in the body portion 67 to the outer periphery of the latter. The apertures 68 slidably retain vanes '70 and the hollow 69 continues through the shaft portions 65 and 66.

Means to conduct a suitable liquid (as oil) to the rotor may be a conventional conduit 81 opening to the interior of a nipple 82 disposed in a suitable opening 33 in the end wall 62. The conduit 81 may be coupled to the nipple 82 as by a coupling nut 84 like the nut 44. Preferably this nipple is elongated within the hollow 69 to provide means to fiow liquid through the rotor. This elongation is shown as a centrally-disposed way or tube 87, smaller in outer diameter than the diameter of the hollow 69, and which has its discharge mouth very closely adjacent the outer end-of the chamber 69, whereby the liquid which flows through this way must empty into the hollow 69 in a zone closely adjacent this outer end. 'Thereupon the liquid flows along the wall of the hollow 69 to cool the chamber 69, seal assembly 59 and bushing 64 before it reaches the apertures 68, since it cannot flow farther in one direction because of the closure, baffie or partition wall and it will reverse its flow in the new path toward the end wall 62.

After the liquid reaches the inner ends of the apertures 68 its action is similar to that described in connection with the pump A.

Of course some of the liquid will also cool the bushing 63, as is obvious.

A small opening 91 in the bushing 64 functions as does the opening 51 in the bushing 21.

Figs. 6 and 7 illustrate the pump C which is preferably provided with the stator housing 95 much like those of the pumps A and B, although the intake or suction port 96 and exhaust port 97 may have bevelled or funnelled inner end portions as is shown in Fig. 6, extending to the pump chamber 98. There are preferably provided the flanged bushings 100 and 101 and the housing 95 has an end wall 102 with a rotor seal assembly 103 at the opposite end of the housing contained in a chamber 104 closed by a seal housing 105. The seal housing 105 is carried by an end cap 106 substantially similar to the end caps 26 and 62 and attached to the housing 95.

The rotor of the pump C differs from those of the pumps A and B by having its vanes slidably disposed in recesses or pockets instead of slots.

This rotor includes outer hollow shaft portions 110 and 111 respectively, preferably integral with an intermediate hollow body portion 112 with the latter provided with aperture 113, which may be spaced-apart vane-receiving recesses or pockets. These recesses or pockets have their bottoms spaced from the hollow 114 in the body portion 112 and slidably receive the vanes 115.

Means to conduct a liquid (as oil) to the rotor of the pump C may be similar to that employed in the pump B and include a conventional conduit 121 opening to and coupled by means of a coupling nut 121 to a nipple 122 carried by the wall 102, an opening therein being provided for the nipple, which latter is preferably elongated within the hollow 114 to provide means to flow liquid through the rotor. This elongation is shown as a centrally-disposed way or tube 127, smaller in exterior diameter than the diameter of the hollow 114, and which has its discharge mouth very closely adjacent the outer end of the chamber 104, whereby the liquid which flows through the way must empty into the hollow 114 in a zone closely adjacent this outer end. Thereupon the liquid flows along the wall of the hollow 114 to cool the chamber 104 and its seal assembly 103 and, subsequently,

t bush n 01 be reitre'acheea nlu a ty of op n n then .s i eha se trim the eharnh thr u h the exheust 7 28 t w b n o a near eei n's' nert 1.1

After the liquid reaches ,the bottoms .of the apertures 113, its action'is partly similar to that described in con nection with the pump A. vHowever, it will also provide seals between the ,bottoms of the aperturesfland th ott m f t ex ende v nes Of course, as is clear, some of {the liquid will also cool ,the bushing 111i).

A closure, ,bafi le tor zP-artit-ion wall 130 closing the outer end of the shaft portion 111 -pr,e.\ter 1ts flow of liquid from t n an ca s it r urn ow rd th en e 102.

A small opening 131 i the b l hing 101 functions l th 'epe nsli ther u hing 2 in Fi u e 8, 1. and h. u p (D i i t d- It is preferably provided ,with the stator housing 135 uh tan al y ik the hou n 9, an h ng th n k o t n po 3 exhaus Po t 21. xte n t a mp nh mhe .3 lFlenged bus n .1 an 4 e e pr v d d ut i fe m th bu hin 20 2 4 1101 and 10 in tha eae een ei s ene n o hen fo lo o l qu d th ou t e nt a h rw lhi subsequently doscribed. l here are a rotorseal assembly 3, n hani 11 therefo an a hous n 14 ta ing the phamber and assembly ,and contained within an n cap sub tantial y th end ear .2 and i er y at a hed.-

h ot r of the p mp D has s e .e th at re f h r o o the pump in tha e wan e s i a y i p s in ape res 1 .53, a r e or p cket b the how of liqu d from t e hollow of the rot r s a to th exterior of the rotor is different.

This rotor inclu es out r hollo sha t po ti 1 and 151 respectively, =preferably integrally connected with an intermediate hollow body portion 152 with the latter provided with the spaced-apart vanesreceiving apertures 153, having their bottoms spaced from the hollow 154 of the body portion, and slidably receive the vanes 155.

Means :16!) to conduct a liquid (as oil) to the rotor of the pump D may be similarto that employed in the pumps 1B and ;C and include a conventional conduit :161 connected as by a coupling nut-161 m a nipple 162 extending through a suitable opening in the wall 142. The nipple is preferably elongated within the hollow 154 to provide means to flow liquid through the rotor. This elongation-is shown as a centrally-disposed .way or .tube 167 smaller in outer diameter that the diameter of the hollow 154 and which has its discharge mouth very closely adjacent the outer end of the chamber 144, whereby the liquid which flows through the way must empty into the hollow in a zone closely adjacent this outer end. Thereupon the liquid flows along the wall of the hollow 154 so as to cool the bushing 141 and enters, a plurality of openings 168 in the shaft portion 151, closely adjacent its juncture with the hollow body portion 152, whereupon it flows through an opening 169 in the bushing 141 which opening may be provided by bevelling the vertical face of the bushing at the juncture of the flanged portion and this vertical face. This opening 169 extends substantially 180 and is adapted to front at the intake portion of the chamber 138. Openings 170, similar to the openings 168, are provided in the shaft portion 150 adjacent its juncture with the hollow body portion 152 and communicate with an opening 171, substantially like the opening 169, in the bushing 140.

It is now clear, in Fig. 9, that the liquid provides a cushion behind the vanes 155 which tends to press the outer edges of the extended vanes firmly against the wall of the chamber 138, and this liquid may flow along the spaces between the extended vanes 155 and the surfaces of their recesses 153, and will discharge, by centrifugal force into the suction portion of the chamber 138 to be carried through the chamber, providing a seal, and to be -.1'1 l. ..1 A sma onen n n th s in ,1 is P d d t function as do the openings 51, .91 and 131.

In :order to prevent flow of liquid .much beyond the outer endzof the way 167, I prefer to provide the closure or partition wall 1'14 which' functions as does the walls 50,90 and 130,.

Fig. 12 illustrates one application of any of .thepumps A, .13, C or 1D, and therein designated as pump. ,Ifhere the pump is lconnected, at its exhaust port (which may he anytof ports ,17, 58;, 97 or 137) with a suitable conduit 1,75 opening intoatconventionalseparator 176 forliquids, ,as a lubricating ,oil, ;and fluids, such as compressed refrig erant, ,withthe separator containing, for example, copper wool 177 to provide anti-splash means for the oil separated and to prevent its .entry into the separated compressed refrigerant conduit 1-78. The separated oil flows through the conduit 179 where it may be conventionally cooled, as by an air :blast .upon vthe coils 180 and then flows through aconduit which may be any one (of conduits ,41, 81, 121 or 161 to the rotor of the pump has been described. From the conduit 178 the compressed refrigerant flows ,to and through a conventional condensor 181 and evaporator 182 with a conventional ,expansionvalve between them, and from the evaporator the refrigerant flows through the suction conduit 183 to t the-suction or intake .port of the pump.

Each form of the invention, adapted to vane-type rotary pumps of different build, includes means for introducing a mobile cooling, lubricating and sealing medium sh e the Pump by y f the sha t of t fe thereof to hee l t e bu h ng sun hnd ns th ha t inee the m d m hows th m one en o he shaf n t other end ther of w th n th housin of he pump, is then baffled to flew n an o po t path, an n i was ,by suctipn and (centrifugal force between the surfaces of -the Mane and the apertu e islets er ec s) n the ente h y to he hr wn b ee r esa fo ce upo e su i ee o -.ete e rehe nh r w a sm l volume -the *m dihm 'hei a ter a e y f eed nt nd sucked o o th wi seal ehamhe th u n o t sh a a t e tien at t e Jenes u s f the p p- E eh hti ize a ho low shaf of i it a y n nal n, m dified to mbo y fea ures of the i nti 1 the reees tyne te th C an the med um t s to p M s e a s shiq the ind he e nd vanes so s i caus these vanes to press firmly against the-walls of thecharnbers to aid in sealing.

Various changes may be made to the forms of the invention herein shown and described without departing from the spirit of the invention or scope of the claims What is claimed is:

l. A reciprocating-vanes rotary pump having an elongated housing provided with opposite end walls and a rotor chamber; a vanes-carrying partially hollow rotor body within said chamber; a hollow rotor shaft rigid with and supporting said body; spaced-apart bushings providing bearings for said shaft and being carried by said housing; a'rotor shaft seal assembly disposed about said shaft, carried by said housing adjacent one of said end Walls and one of said bearings and open to said chamber; introducing means extending through the other of said end walls to introduce a fiowable cooling, lubricating and sealing medium into said shaft at the longitudinal axis of said shaft and having a discharge month Within said shaft and spaced from the tubular wall of said shaft; baffle means closely adjacent and facing said mouth and disposed across the hollow of said shaft, to change the direction of flow of said medium; said shaft being provided with a plurality of passageways to conduct said medium from said bame means, first radially and then longitudinally of said shaft, to lubricate and cool said bearings and seal assembly; and discharge means carried by said rotor body to continuously cause a volume of said medium from 7 said passageways to contact the surfaces of the vanes of said pump, when said rotor body is in rotation, and be discharged outwardly of said body by centrifugal force to lubricate the wall of said chamber.

2. A reciprocatingvanes rotary pump according to claim 1 characterized in that one of said bearings is provided with an intake passageway extending therethrough from said chamber directly to said seal assembly.

3. A reciprocating-vanes rotary pump according to claim 1 characterized in that one of said bearings is provided with an intake passageway extending substantially parallel with said longitudinal axis and through said one of said bearings from said chamber directly to said seal assembly, said intake passageway having an intake port with the port alternately opened and closed by said vanes when said rotor body is in operation.

4. A reciprocating-vanes rotary pump according to claim 1 characterized in that said rotor body is provided with a plurality of spaced-apart apertures extending to the hollow thereof and to the outer periphery thereof with vanes slidable within said apertures and with the inner ends of said vanes constructed and arranged to abut one another, and said passageways are disposed inwardly of both the outer peripheries of said shaft and rotor body.

5. A reciprocating-vanes rotary pump according to claim 1 characterized in that said rotor body is provided with a plurality of spaced-apart apertures extending to the hollow thereof and to the outer periphery thereof, with vanes slidable within said apertures and with the inner ends of said vanes extending to the inner periphery of said rotor body, and said introducing means includes a nipple extending into said other of said ends, and said passageways include a tube extending from said nipple through said shaft and body and the outer periphery of said tube is spaced from the walls of said shaft and rotor body and said inner ends of said vanes.

6. A reciprocating-vanes rotary pump according to claim 1 characterized in that introducing means includes a nipple extending into said other of said ends, and said passageways include a tube extending from said nipple through said shaft and body and the outer periphery of said tube is spaced from the walls of said shaft and rotor body and said inner ends of said vanes, said rotor body is provided with a plurality of spaced-apart apertures, extending to the outer periphery and toward the inner periphery of said rotor body and are substantially alike, with pump vanes slidable within said apertures and said apertures are spaced from said tube.

7. A reciprocating-vanes rotary' pump according to claim 1 characterized in that said rotor body is provided with a plurality of spaced-apart apertures, extending to the outer periphery of said rotor body, and having inner ends with vanes slidable within said apertures, introducing means includes a nipple extending into said other of said ends, and said passageways include a tube extending from said nipple through said shaft and body and the outer periphery of said tube is spaced from the walls of said shaft and rotor body and said inner ends of said vanes, and said discharge means defines a plurality of openings in said hollow body which extend from said hollow thereof to the inner ends of said apertures, and are spaced from said tube.

8. A reciprocating-vanes rotary pump according to claim 1 characterized in that said partially hollow rotor body is provided with a plurality of spaced-apart apertures extending to the outer periphery of said partially hollow rotor body, with pump vanes slidable within said apertures, and said discharge means defines a plurality of openings in said partially hollow rotor body extending from the hollow thereof to said bushings and openings in said bushings in communication with said apertures upon rotation of said partially hollow rotor body.

9. A reciprocating-vanes rotary pump according to claim 5 characterized in that said bushings have faces facing the chamber of said housing and with said partially hollow rotor body in rotative contact with said faces, and said discharge means defines an arcuate opening in each of said faces of said bushings, and a plurality of openings in said hollow body extending from the hollow thereof to the arcuate openings in the faces of said bushings, and said arcuate openings are in communication with said apertures upon rotation of said partially hollow rotor body and are spaced from said tube.

References Cited in the file of this patent UNITED STATES PATENTS 1,237,668 Machlet Aug. 21, 1917 2,070,662 Johnson Feb. 16, 1937 2,324,903 Beckman July 20, 1943 2,400,286 Buckbee May 14, 1946 2,639,855 Daniels May 26, 1953 FOREIGN PATENTS 242,522 Great Britain Nov. 12, 1925 445,878 Great Britain Apr. 20, 1936

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