CN1402815A

CN1402815A - Pump housing

Info

Publication number: CN1402815A
Application number: CN 00816392
Authority: CN
Inventors: T·W·莱昂哈德
Original assignee: Gardner Denver Thomas Inc
Current assignee: Gardner Denver Thomas Inc
Priority date: 1999-11-29
Filing date: 2000-11-28
Publication date: 2003-03-12
Anticipated expiration: 2020-11-28
Also published as: JP4052628B2; AU1930001A; DE60027202T2; CA2392909A1; JP2003515061A; MXPA02005296A; DE60027202D1; EP1242744A1; EP1242744B1; WO2001038743A1; CA2392909C; CN1246595C

Abstract

A pump housing (14, 16) has a fan guard (40) secured to the end of the housing by four crescent-shaped tabs (60) fitting into four crescent-shaped cast-in recesses (66) of the housing (14, 16) and ears (68) of the tabs (60) fitting into cast-in holes (70) in the housing (14, 16). The ears (68) and holes (70) on opposite sides of the housing (14, 16) are aligned along a common axis (80, 82). The ears (68) are tapered at their leading ends (90) and squared off at their trailing ends (92), and the guard (40) has a radial projection (56) that fits into an opening in the housing (14, 16).

Description

Pump case

Related application for reference

The application requires the U.S. Provisional Patent Application No.60/167 of submission on November 29th, 1999,839 preference.

The relevant statement that does not also obtain by the retrieval of U.S. government's undertaking

Technical field

The present invention relates to pump, for example compressor and vacuum pump more particularly, relate to the housing that is used for pump.

Background technique

Reciprocating piston pump or diaphragm type pump have a metal shell usually, and cast aluminium alloy for example is installed in the main shaft that bearing in this housing can support driven pump.Especially for bigger pump, need metal shell to bear the power of driven plunger or dividing plate, and bear the pressure in the pressing chamber that is applied to pump.

Usually use a rotary electromotor to drive these pumps, this motor needs cooling.In a kind of such pump, motor is arranged between the two housings, and each housing separates with another housing, and is provided with a pressing chamber.The main shaft of motor is an axis, so that each end of main shaft is equipped with one in piston or the dividing plate, the running of described piston or dividing plate can change the volume of pressing chamber of the housing of the respective end that is arranged in main shaft.Further,,, and it is blown on the rotor and stator coil of motor so that cooling air flow is sucked the housing of locating in this end with a rotary fan blade installation each end in axle from the position of piston or dividing plate is housed.

About cooling effectiveness, preferably make the housing parts that the rotary fan blade is installed rounded, and just in time be slightly larger than the diameter of fan blade.Space between the tip of fan blade and the inner shell surface should be as much as possible little, and reason is: if not, the air that is sucked housing by fan blade will only blow back and the tip by blade, and can't point to above the coil of motor.Be contained in the application of the enclosure of separation for pump, the shell end that allows fan blade is housed is opened wide.Yet, if pump is displayed or sells as stand-alone product, must use the end of closed with covers housing, described lid allows air is sucked housing, but stops bigger object or finger to insert.This lid is commonly called fan guard, and it can not influence the operation of fan nocuously or increase transverse dimension or the surface of damage fan.

Summary of the invention

The invention provides a kind of fan guard, need not housing is carried out any special processing, needn't increase the internal voids that is used for fan and needn't increase the transverse dimension of housing or damage its surface, just can make this fan guard be attached to housing easily or unload from its surface.Fan guard has aperture, and to pass air into housing and to pass through this housing, this fan guard has periphery contact pin, and this contact pin extends into housing along the direction that is parallel to main-shaft axis.Contact pin has crescent profile, forms the similar recess of shape in the housing.The crescent recess of housing has the hole that is formed at wherein.Each contact pin of fan guard has an ear, and this ear's click clatter one sound card closes (snap) in the hole of corresponding recess, so that fan guard is held in place at the top, end of housing.

In a preferred versions, recess and hole are the devices that is cast into of housing.Owing to move core in the mold along the direction perpendicular to the foundry goods separation line, so the Kongzui that forms in the recess has a horizontal axis well, so that it is formed in the casting process.Thereby, in the recess porose axis be parallel to each other.Each ear also has an axis, and this axis is the main direction of extending from contact pin, and this axis of ear is corresponding with the axis in hole usually, so that make ear's axis parallel with axially bored line when being received in the hole in ear.Be preferably on the far-end of ear an inclined surface is set, so that when fan guard inserts shell end, contact pin is curved inwardly, the near-end of ear is done squarely, so that when shell end is inserted in the fan guard contact pin of engaging, ear is fastened in the hole, and blocks the nearside in hole by the near-end of ear.

Crescent contact pin is also referred to as D shape in this article, they preferably are slightly less than the similar recess of shape in the housing, so that contact pin to the continuous part of internal surface near the internal surface of housing, thereby can not hinder fan blade or need the tip of fan blade and the excessive space between the enclosure interior.The internal surface of contact pin is preferably in crescent recess part omitted nick goes into, if thereby ear be not engaged in the hole fully, if perhaps unload fan guard when fan moves, contact pin can't flex inward into the degree that hinders vane tip.

Can around the crankcase periphery partly of housing, any amount of contact pin and corresponding recess be set.In a preferred versions, be provided with four contact pin and corresponding recess.Contact pin and recess are provided with two on each side of housing, two on each side separate as much as possible, a top on each side towards the crankcase part, and another is towards the bottom of crankcase part.With the hole vertically separate help to be provided with one firm fixing.

Fan guard is normally circular, radially extends or opposite device from fan guard but preferably be provided with at least one, and this device is used for respect to housing fan guard being located in position angledly.This device can be fitted in the similar opening of shape in the pressing chamber part of housing, and can not increase the width or the height of compressor.

It should also be noted that, if ear and hole have the axis of its level, the housing recess is arranged on the relative both sides of vertical axis symmetrically, hole on the relative both sides of the housing of case top and ear will be along horizontal axiss, will be along a different horizontal axis in the hole and the ear of housing bottom.Thereby the contact pin at top is pressed on the housing relative to one another, and the contact pin of bottom is pressed on the housing relative to one another, so that fan guard is held in place.

Aforementioned and other purpose of the present invention and advantage will be embodied in will being described in detail below.In narration, the accompanying drawing that illustrates preferred embodiment of the present invention as a reference.

Description of drawings

Fig. 1 is the stereogram that comprises pump of the present invention;

Fig. 2 is and the similar diagrammatic sketch of Fig. 1, but fan guard separates with pump case;

Fig. 3 is the sectional view that becomes radially and pass through the plane of the ear in the contact pin of fan guard with pump shaft, and this fan guard is assemblied on the housing;

Fig. 4 is the enlarged view of one of the contact pin seen from the same plane of Fig. 3 and recess, and its ear is received in the hole; And

Fig. 5 is the longitdinal cross-section diagram that is received in one of contact pin in the recess, and its ear is engaged in the hole.

Embodiment

Fig. 1 shows pump 10 of the present invention, and this pump has a motor 12, and an end of this motor has a housing 14, and the other end has a housing 16.Housing 14 is cast and is identical by aluminum alloy with 16.Integral head 18 comprises the head component 20,22 and the connecting tube 24,26 of integrally casting, above the corresponding pressing chamber part 34 and 36 of respective housings 14 and 16, with bolt integral head is fixed in housing 14 and 16, keep together with assistance housing 14 and 16, and reciprocally keep its angle position.

Pump 10 also comprises fan guard 40, and each end has a fan guard, and they are identical each other.See also Fig. 2, motor 12 has a main shaft 42, and this main shaft runs through motor and penetrates housing 14 and 16, almost leads to the end of each respective housings.Each end of main shaft 42 is equipped with a rotary fan blade 44, and this fan blade along direction rotation, so that air sucks each respective housings 14 and 16, and makes its coil that points to motor 12 top by main shaft 42.The housing of motor 12 is provided with several holes with the discharging cooling air, is provided with the other ventilation slot near motor in the housing 14 and 16.Housing 14 and 16 is provided with the bearing (not shown bearing) of supporting spindle 42.Housing 14 and 16 also has opening therein, and described opening provides the axial flow of air, so that the air that moves by fan blade 44 arrives the coil of motor 12.

Each fan cover 40 is with holes, and they have spoke radially, is provided with the circular rib that separates between spoke, to provide by covering the inlet of 40 cooling air.Each cover 40 has a wheel rim 50, and this wheel rim forms a groove 52 on the side within it, and the flange 54 of this groove receivability adjacent housings 14,16 is radially located with respect to housing to assist fan guard 40.

One jut 56 radially extends from wheel rim 50, and is fitted into the opening 58 that forms in the pressing chamber part 34 or 36 of each housing 14 or 16.Jut 56 assists fan guard 40 to locate with respect to jut assembling housing 14 or 16 thereon angledly, and is provided with a nameplate.Fan guard 40 is made by suitable elastomeric plastics resin, for example polyester polymer.

Each cover 40 has four contact pin 60, and each contact pin is in different quadrants, and they are parallel to main shaft 42 and extend into the corresponding crankcase part 62 of respective housings 14 or 16 or 64 end.As Fig. 4 preferably shown in, each contact pin 60 is D or crescent usually, and is fitted in the similar but bigger recess of shape 66, this recess is formed in respective housings 14 or 16 with the angle position of correspondence, and trend also is parallel to main shaft 42.Each contact pin 60 has an ear 68, and this ear is snapped into the hole 70 that is formed in the recess 66.Recess 66 and hole 70 all are the devices that personnel in the art form with the ordinary skill casting.When contact pin 60 is received in the recess 66 and ear 68 when being engaged in the hole 70, the internal surface 72 of contact pin 60 is recessed slightly from the circular surface 74 of housing, and circular surface 74 just slightly separates with the tip of fan blade 44.Surface 72 is recessed like this, if so that when fan moves, unload cover 40 from housing, contact pin 60 will can not be moved into the degree of the fan blade that hinders rotation.In addition, because contact pin 60 is from surperficial 74 recessed, contact pin 60 can not increase required pore volume between the tip of fan blade and the housing.

As shown in Figure 3, have two contact pin 60 and corresponding recess 66 in the top of crankcase, have two in the bottom.All aim at for two in the top along wall scroll horizontal line 80, and aiming at along horizontal line 82 in the bottom.Although the arcuate surface of recess 66 and contact pin 60 along the

line

84 and 86 is symmetrical in the radial line segments of main shaft 42, ear 68 and hole 70 be line but aim at along

horizontal line

80 and 82 radially not, and described horizontal line is perpendicular to the main separation line of the housing 14,16 of casting.

As Fig. 5 preferably shown in, each contact pin 60 has an introducing or a distal surface 90 that tilts, when cover was inserted into housing, this distal surface was used to make contact pin 60 to curve inwardly.Each ear 68 also has a proximal end face 92, and the outside 94 of this proximal end face and ear 68 meets at right angles or almost meets at right angles, so that the engagement connection of the ear 68 in the hole 70 is provided.

Quite at length narrated preferred embodiment of the present invention.Skilled person in the art will be known described embodiment's multiple modification and modification, so the present invention should not be limited to described embodiment.

Claims

1. pump case, it has a roughly cylindrical open end, described end has the axial fan rotor on the main shaft that is installed in the described open end, so that air sucks described open end from the outside of described housing, described open end is covered by fan guard with holes, use described fan can make inhaled air pass through described fan guard, it is characterized in that, described fan guard has some along the angled contact pin that separates of periphery, described contact pin extends into the open end of described housing along the direction parallel with main-shaft axis, each described contact pin has a crescent profile and an ear from the outer surface projection of described contact pin, wherein in described housing, be formed with the similar crescent recess of some shapes to admit described contact pin, the arc-shaped inner surface of described recess is resisted against the similar arc-shaped outer surface of described contact pin, and in described housing, form the several holes lead to described recess, wherein the ear of each contact pin is fastened in the hole of corresponding recess, so that described fan guard is held in place at the top, end of described housing.

2. pump case as claimed in claim 1 is characterized in that, described recess and hole are the devices that is cast into of housing.

3. pump case as claimed in claim 2 is characterized in that, the hole that is formed in the described recess has an axially bored line separately, and described axially bored line is perpendicular to the plane of the axis of the cylinder that comprises main-shaft axis and pump.

4. pump case as claimed in claim 3 is characterized in that, each described ear extends along the direction that is parallel to the axially bored line direction from respective tabs.

5. pump case as claimed in claim 1 is characterized in that the far-end of described ear is provided with an inclined surface, so that when the end of described housing is inserted in contact pin, described contact pin is curved inwardly.

6. pump case as claimed in claim 5, it is characterized in that, described ear has a near-end relative with far-end, described far-end is done squarely, so that when the end of described housing is inserted in described contact pin, described ear is fastened in the hole, and block the nearside in described hole by the near-end of described ear.

7. pump case as claimed in claim 1, it is characterized in that, described contact pin is less than the recess in the described housing, so that described contact pin to the continuous part of internal surface near the internal surface of described housing, thereby can not hinder fan blade or need the tip of described fan blade and the excessive space between the described enclosure interior.

8. pump case as claimed in claim 7, it is characterized in that, in their recess of admittance, being recessed into of described contact pin to internal surface, if thereby described ear is not engaged in the described hole fully, if perhaps unload described fan guard when fan moves, described contact pin can't flex inward into the degree at the tip that hinders described fan propeller.

9. pump case as claimed in claim 1 is characterized in that, is provided with four contact pin and corresponding recess.

10. pump case as claimed in claim 9 is characterized in that, described four contact pin and recess are provided with two on each side of described housing, and contact pin and corresponding recess are arranged in each quadrant of four isogonism quadrants of described housing.

11. pump case as claimed in claim 10, it is characterized in that, four contact pin and recess are arranged on the relative both sides of described housing symmetrically, hole on the relative both sides of the described housing of described case top and ear be along an axis alignment, in the hole of described housing bottom and ear along a different axis alignment.

12. pump case as claimed in claim 1, it is characterized in that described fan guard is normally circular, but has the device that at least one radially extends from described fan guard, and be fitted into the respective openings of described housing, so that locate described fan guard angledly with respect to described housing.