EP1242744B1 - Carter de pompe - Google Patents

Carter de pompe Download PDF

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Publication number
EP1242744B1
EP1242744B1 EP00982243A EP00982243A EP1242744B1 EP 1242744 B1 EP1242744 B1 EP 1242744B1 EP 00982243 A EP00982243 A EP 00982243A EP 00982243 A EP00982243 A EP 00982243A EP 1242744 B1 EP1242744 B1 EP 1242744B1
Authority
EP
European Patent Office
Prior art keywords
housing
tabs
fan
recesses
ear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00982243A
Other languages
German (de)
English (en)
Other versions
EP1242744A1 (fr
Inventor
Todd W. Leonhard
Shawn Leu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Thomas Industries Inc
Original Assignee
Thomas Industries Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Thomas Industries Inc filed Critical Thomas Industries Inc
Publication of EP1242744A1 publication Critical patent/EP1242744A1/fr
Application granted granted Critical
Publication of EP1242744B1 publication Critical patent/EP1242744B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/066—Cooling by ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards

Definitions

  • This invention relates to pumps such as compressors and vacuum pumps, and in particular to a housing for a pump as specified in the preamble of claim 1 and is known e.g. from DE-A-4 337 631.
  • Reciprocating piston or diaphragm pumps typically have a metal housing, for example, a cast aluminum alloy, in which bearings are mounted which journal the shaft which drives the pump.
  • a metal housing is needed, particularly for larger pumps, to withstand the forces of driving the piston or diaphragm and containing the pressure exerted in the compression chamber of the pump.
  • a rotary electric motor is usually used to drive these pumps and the motor requires cooling.
  • the motor is provided between two housings, each of which is separate from the other and houses one compression chamber.
  • the shaft of the motor is a through shaft so that each end of the shaft mounts one of the pistons or diaphragms that work to vary the volume of the compression chamber in the housing at the corresponding end of the shaft.
  • a rotary fan blade is mounted to each end of the shaft to draw a flow of cooling air into the housing at that end and blow it onto the rotor and stator coils of the motor.
  • the part of the housing in which the rotary fan blade is mounted circular and just slightly larger than the diameter of the fan blade.
  • the clearance between the tips of the fan blades and the interior housing surface should be as small as possible because, if not, the air drawn into the housing by the fan blades will simply blow back out past the tips of the blade, and not be directed over the coils of the motor.
  • the pump is contained inside of a separate enclosure, it may be permissible to leave the end of the housing at which the fan blade is mounted open.
  • the end of the housing must be closed with a cover which permits air to be drawn into the housing, but prevents the insertion of larger objects or fingers. This cover, typically called a fan guard, should not deleteriously affect the operation of the fan nor add to the lateral size or detract from the appearance of the fan.
  • the invention provides a fan guard which easily attaches to the housing, without requiring any special machining of the housing, does not increase the internal clearance for the fan and does not add to the lateral size of the housing or detract from its appearance.
  • the fan guard is perforated so as to permit the inflow of air to the housing past it, and has peripheral tabs which extend into the housing in a direction parallel to the axis of the shaft.
  • the tabs have a crescent-shaped profile, and similarly shaped recesses are formed in the housing.
  • the crescent-shaped recesses of the housing have holes formed in them.
  • Each tab of the fan guard has an ear which snaps into the hole in the corresponding recess to hold the fan guard in place over the end of the housing.
  • the recesses and holes are cast-in features of the housing.
  • the holes which are formed in the recesses preferably have a horizontal axis to permit them to be formed during the casting process, since inserts in the die move in this direction, which is perpendicular to the parting line of the casting.
  • the axes of all the holes in the recesses are parallel to one another.
  • Each ear also has an axis, which is the major direction it extends from the tab, and this axis of the ear generally corresponds to the axis of the hole, so that the ear axis is parallel to the hole axis when the ear is received in the hole.
  • a ramped surface is preferably provided on the distal end of the ear, to flex the tab inwardly upon insertion of the fan guard in the end of the housing, and the proximate end of the ear is squared off so that the ear snaps into the hole and the near side of the hole is caught by the proximal end of the ear when the snap-in fan guard tabs are inserted into the end of the housing.
  • the crescent-shaped tabs which are also referred to herein as D-shaped, are preferably somewhat smaller than the similarly shaped recesses in the housing so that the inward surface of the tabs approximates a continuation of the inner surface of the housing so as not to interfere with the fan blades or require an excessive clearance between the tips of the fan blades and the interior of the housing. It is preferred that the inner surface of the tab be somewhat recessed within the crescent-shaped recess so that if the ear is not fully engaged in the hole, or if the fan guard is removed with the fan turning, the tabs do not flex so far inwardly as to interfere with the tips of the blade.
  • tabs and corresponding recesses around the periphery of the crank case portion of the housing may be provided.
  • four tabs and corresponding recesses are provided.
  • the tabs and recesses are provided with two on each side of the housing and the two on each side spaced as far apart as possible, with one toward the top of the crank case portion and the other toward the bottom of the crank case portion on each side. Spacing the holes apart vertically helps provide a secure fixation.
  • the fan guard will generally be round, but it is desirable to provide at least one feature which extends radially from the fan guard or otherwise serves to position the fan guard angularly in the proper location relative to the housing. This feature may fit into a similarly shaped opening in the compression chamber portion of the housing without adding to the width or height of the compressor.
  • the ears and holes have their axes horizontal, and the housingrecesses are arranged symmetrically on opposite sides ofa vertical axis, the holes and ears on opposite sides of the housing at the top of the housing will be along one horizontal axis and at the bottom of the housing will be along a different horizontal axis.
  • the tabs at the top press against the housing opposite to one another and the tabs at the bottom press against the housing opposite to one another to hold the fan guard in position.
  • Fig. 1 illustrates a pump 10 of the invention having a motor 12 with a housing 14 at one end and a housing 16 at the other.
  • the housings 14 and 16 are cast of aluminum alloy and are identical.
  • the pump 10 also includes fan guards 40, one at each end, which are identical to one another.
  • the motor 12 has a shaft 42 which extends through it and into both housings 14 and 16, nearly to the end of each respective housing.
  • Each end of the shaft 42 mounts a rotary fan blade 44 which is rotated by the shaft 42 in a direction so as to draw air into each respective housing 14 and 16 and direct it over the coils of the motor 12.
  • the housing of the motor 12 is provided with holes to provide for the exhaust of cooling air and additional ventilation slots adjacent to the motor may be provided in the housings 14 and 16.
  • the housings 14 and 16 mount bearings (bearings not shown) which journal the shaft 42.
  • the housings 14 and 16 also have openings in them which provide for the axial through-flow of air so that air moved by the fan blades 44 reaches the coils of the motor 12.
  • Each fan guard 40 is perforated, having radial spokes with spaced circular ribs running between them to provide for the inlet of cooling air past the guard 40.
  • Each guard 40 has a rim 50 which on its inner side defines a groove 52 in which a lip 54 of the adjacent housing 14, 16 is received to help locate the fan guard 40 radially relative to the housing.
  • a projection 56 extends radially from the rim 50 and fits into opening 58 which is formed in the compression chamber portion 34 or 36 of each housing 14 or 16.
  • the projection 56 helps locate the fan guard 40 angularly relative to the housing 14 or 16 to which it is assembled, and also provides a nameplate.
  • the fan guard 40 is made of a suitable resilient plastic resin, such as a polyester polymer.
  • Each guard 40 has four tabs 60, each in a different quadrant, which extend parallel to the shaft 42 into the end of the respective crank case portion 62 or 64 of the corresponding housing 14 or 16.
  • each tab 60 is D- or crescent-shaped generally and fits into a similarly shaped, but slightly larger recess 66 which is formed in the respective housing 14 or 16 at a corresponding angular location and also runs parallel to the shaft 42.
  • Each tab 60 has an ear 68 which snaps into a hole 70 formed in the recess 66.
  • the recess 66 and hole 70 are both features which can readily be cast in features by persons of ordinary skill in the art.
  • the inner surface 72 of the tab 60 is slightly recessed from the circular surface 74 of the housing, which circular surface 74 is only slightly spaced from the tips of the fan blade 44.
  • the surface 72 is so recessed so that if the guard 40 is removed from the housing with the fan running, the tab 60 will not be moved so far inwardly as to interfere with the rotating fan blade.
  • the tab 60 since the tab 60 is recessed from the surface 74, the tab 60 does not increase the required amount of clearance between the tips of the fan blade and housing.
  • FIG. 3 there are two tabs 60 and corresponding recesses 66 in the upper portion of the crank case and two in the lower portion.
  • the two in the upper portion are both aligned along a single horizontal line 80 and in the lower portion are aligned along horizontal line 82.
  • the recesses 66 and arcuate surfaces of the tabs 60 are symmetrical about lines which are radial to the shaft 42 along lines 84 and 86, the ears 68 and holes 70 are not, being aligned along the horizontal lines 80 and 82, which are perpendicular to the major parting line of the housing 14, 16 casting.
  • each tab 60 has a ramped lead-in, or distal, surface 90 which serves to flex the tab 60 inwardly when the guard is inserted in the housing.
  • Each ear 68 also has a proximal surface 92 which is at a right angle or nearly right angle to outer side 94 of the ear 68 so as to provide for a snap-in connection of the ear 68 in the hole 70.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Rotary Pumps (AREA)

Claims (12)

  1. Carter de pompe (14, 16) ayant une extrémité ouverte généralement cylindrique avec une hélice de soufflante axiale (44) montée sur un arbre (42) dans ladite extrémité ouverte pour aspirer de l'air dans ladite extrémité ouverte provenant de l'extérieur dudit carter, ladite extrémité ouverte étant recouverte d'une bague de soufflante perforée (40) qui permet à l'air aspiré par ladite soufflante de passer au travers, caractérisé en ce que ladite bague de soufflante (40) a des pattes périphériques espacées angulairement (60) qui s'étendent dans l'extrémité ouverte du carter dans une direction parallèle à l'axe de l'arbre (42), chaque dite patte ayant un profil en forme de croissant et une projection (68) faisant saillie à partir d'une surface externe de ladite patte (60), et dans lequel des évidements (66) profilés de façon similaire en forme de croissant sont formés dans le carter pour recevoir les pattes avec une surface interne incurvée de l'évidement contre une surface externe incurvée de façon similaire de la patte, et des trous (70) sont formés dans ledit carter qui donnent dans lesdits évidements (66), dans lequel la projection de chaque patte s'encliquete dans le trou dans l'évidement correspondant pour maintenir la bague de soufflante en place sur l'extrémité du carter.
  2. Carter de pompe (14, 16) selon la revendication 1, dans lequel les évidements (66) et les trous (70) sont des éléments de moulage du carter (14, 16).
  3. Carter de pompe selon la revendication 2, dans lequel les trous (70) qui sont formés dans les évidements (66) ont chacun un axe de trou qui est perpendiculaire à un plan qui comporte l'axe d'arbre et un axe d'un cylindre de la pompe.
  4. Carter de pompe selon la revendication 3, dans lequel chaque projection (68) s'étend à partir de la patte correspondante (60) dans une direction qui est parallèle à la direction des axes de trou.
  5. Carter de pompe selon la revendication 1, dans lequel une surface en pente (90) est prévue sur une extrémité distale de la projection (68) de manière à fléchir la patte vers l'intérieur lors de l'insertion des pattes (60) dans l'extrémité du carter (14, 16).
  6. Carter de pompe selon la revendication 5, dans lequel la projection (68) a une extrémité proximale (92) opposée à l'extrémité distale qui est équarrie de sorte que la projection (68) s'encliquete dans le trou et le bord du trou à proximité est en prise avec l'extrémité proximale de la projection (68) lorsque les pattes (60) sont insérées dans l'extrémité du carter (14, 16).
  7. Carter de pompe selon la revendication 1, dans lequel les pattes (60) sont plus petites que les évidements (66) dans le carter (14, 16) de sorte que les surfaces intérieures (72) des pattes s'approchent d'une continuation de la surface interne (74) du carter de manière à ne pas interférer avec les pales de soufflante ou requiert un jeu excessif entre les bouts de pales de soufflante et l'intérieur du boîtier.
  8. Carter de pompe selon la revendication 7, dans lequel les surfaces intérieures (72) des pattes (60) sont évidées à l'intérieur des évidements dans lesquels elles sont reçues de sorte que si la projection (68) n'est pas complètement engagée dans le trou, ou si la bague de soufflante (40) est retirée avec la soufflante en rotation, les pattes ne se fléchissent pas vers l'intérieur dans une mesure telle qu'elles interfèrent avec les bouts de l'hélice de soufflante (44).
  9. Carter de pompe selon la revendication 1, dans lequel quatre pattes (60) et des évidements correspondants (66) sont prévus.
  10. Carter de pompe selon la revendication 9, dans lequel les quatre pattes (60) et les évidements (66) sont prévus au nombre de deux de chaque côté du carter, avec une patte (60) et un évidement correspondant (66) dans chacun des quatre quadrants équiangulaires du carter (14,16).
  11. Carter de pompe selon la revendication 10, dans lequel les quatre pattes (60) et évidements (66) sont arrangés de façon symétrique sur les côtés opposés du carter, les trous (70) et les projections sur les côtés opposés du carter en haut du carter étant alignés le long d'un axe et en bas du carter étant alignés le long d'un axe différent.
  12. Carter de pompe selon la revendication 1, dans lequel la bague de soufflante (40) est généralement ronde mais avec au moins un élément qui s'étend radialement à partir de la bague de soufflante (40) et qui s'adapte dans une ouverture correspondante du carter pour positionner la bague de soufflante angulairement par rapport au carter.
EP00982243A 1999-11-29 2000-11-28 Carter de pompe Expired - Lifetime EP1242744B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US16783999P 1999-11-29 1999-11-29
US167839P 1999-11-29
PCT/US2000/032384 WO2001038743A1 (fr) 1999-11-29 2000-11-28 Carter de pompe

Publications (2)

Publication Number Publication Date
EP1242744A1 EP1242744A1 (fr) 2002-09-25
EP1242744B1 true EP1242744B1 (fr) 2006-04-05

Family

ID=22609054

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00982243A Expired - Lifetime EP1242744B1 (fr) 1999-11-29 2000-11-28 Carter de pompe

Country Status (8)

Country Link
EP (1) EP1242744B1 (fr)
JP (1) JP4052628B2 (fr)
CN (1) CN1246595C (fr)
AU (1) AU1930001A (fr)
CA (1) CA2392909C (fr)
DE (1) DE60027202T2 (fr)
MX (1) MXPA02005296A (fr)
WO (1) WO2001038743A1 (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050220637A1 (en) 2004-04-01 2005-10-06 Hydro-Gear Limited Partnership Fan shroud for pump
US20060104833A1 (en) * 2004-11-12 2006-05-18 Thomas Industries Inc. Fan guard having channel to direct cooling air to a piston cylinder
GB2463824B (en) * 2005-05-17 2010-06-09 Thomas Industries Inc Pump improvements
ITTO20050839A1 (it) * 2005-11-28 2007-05-29 Faiveley Transp Piossasco S P A Gruppo di generazione e trattamento di fluidi aeriformi compressi, con sistema di raffreddamento perfezionato.
EP2059676A4 (fr) 2006-09-05 2016-01-06 Gardner Denver Thomas Inc Raccords d'admission et d'évacuation de fluide pour un compresseur ou une pompe
CN101163385B (zh) * 2006-10-12 2012-04-11 株式会社三社电机制作所 电镀用电源装置的风扇外壳的卡止结构
DE102006058842A1 (de) 2006-12-13 2008-06-19 Pfeiffer Vacuum Gmbh Vakuumpumpe mit Lüfter
FR2931903B1 (fr) * 2008-05-30 2011-06-24 Thomas Industries Inc Carter de pompe
JP6021141B2 (ja) * 2012-06-08 2016-11-09 アルバック機工株式会社 ポンプ装置
CN103470505A (zh) * 2013-09-30 2013-12-25 柳州易舟汽车空调有限公司 压缩机机壳
WO2016106469A1 (fr) * 2014-12-29 2016-07-07 浙江鸿友压缩机制造有限公司 Structure d'agencement de refroidissement pour compresseur sans huile du type à liaison directe
WO2020121956A1 (fr) 2018-12-11 2020-06-18 日東工器株式会社 Élément pour installation de pompe

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2615884C2 (de) * 1976-04-10 1985-12-12 Maico Elektroapparate-Fabrik GmbH, 7730 Villingen-Schwenningen Einbaulüfter
DE3228395C2 (de) * 1982-07-29 1986-07-24 Hitachi, Ltd., Tokio/Tokyo Verfahren zum Herstellen von Abdeckungen
DE4337631A1 (de) * 1993-11-04 1995-05-11 Kloeckner Humboldt Deutz Ag Schutzvorrichtung für ein Gebläse einer Brennkraftmaschine
US5584675A (en) * 1995-09-15 1996-12-17 Devilbiss Air Power Company Cylinder sleeve for an air compressor
GB2314593B (en) * 1996-06-28 1999-11-10 Thomas Industries Inc Two-cylinder air compressor

Also Published As

Publication number Publication date
CN1246595C (zh) 2006-03-22
DE60027202D1 (de) 2006-05-18
JP2003515061A (ja) 2003-04-22
CN1402815A (zh) 2003-03-12
CA2392909C (fr) 2006-10-10
AU1930001A (en) 2001-06-04
EP1242744A1 (fr) 2002-09-25
WO2001038743A1 (fr) 2001-05-31
DE60027202T2 (de) 2006-12-14
MXPA02005296A (es) 2003-09-22
JP4052628B2 (ja) 2008-02-27
CA2392909A1 (fr) 2001-05-31

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