CN1263996A

CN1263996A - Drainage pump

Info

Publication number: CN1263996A
Application number: CN00101026A
Authority: CN
Inventors: 二宫达志; 今井正幸
Original assignee: Fujikoki Corp
Current assignee: Fujikoki Corp
Priority date: 1999-02-19
Filing date: 2000-01-06
Publication date: 2000-08-23
Anticipated expiration: 2020-01-06
Also published as: KR20000057773A; EP1030063B1; EP1030063A3; EP1030063A2; ES2173699T3; TW445349B; DE69900973D1; JP2000240581A; CN1120938C; DE69900973T2; JP4294143B2

Abstract

A drain pump comprises a housing of a pump body, and a rotary vane placed inside the housing. A penetrating hole is formed to the center of a lid mounted to the upper portion of the housing, and a shaft of the rotary vane penetrates through the hole and protrudes to the upper portion of the lid. A rotor is equipped inside a bracket of a motor, which rotates a driving shaft of the motor. The driving shaft is supported through bearings to the motor bracket. The driving shaft of the motor protrudes from the motor bracket, and is press-fitted to the hole with a bottom formed to the shaft of the rotary vane, so as to drive the rotary vane. The collar comprises a cylindrical portion and a disk-shaped flange, wherein the flange positioned above the penetrating hole prevents a deflector disk from moving upwards. The flange also prevents the drain water leaking out from the hole of the lid from splashing on the motor. A lubricant oil collect area is formed between the upper surface of the cylindrical portion and the bearing.

Description

Drainage pump

The present invention relates to a kind of drainage pump, specifically, relate to a kind of drainage pump that is used for air conditioner.

When the air conditioner internal element cools off operation, adhere to after the airborne condensate moisture on the heat exchanger of indoor unit, water droplet is fallen in the drip disc of heat exchanger below then.Discharge the moisture that is collected in the drip disc with a drainage pump.Drainage pump comprises that a bottom has suction port, top and has the housing that opening and sidepiece have floss hole, and enclosure interior is equipped with a rotatable blade.Utilize a motor rotor blade that is fixed to housing opening top by lid.The rotatingshaft of motor rotatably inserts the Kong Bingyu sharf that covers and connects.When the motor operation made blade rotation, the condensed water that is collected in the drip disc sucked from the blade lower end by suction port, and utilizes centrifugal force with the internal surface pumping of water along housing, then its floss hole from housing is discharged to the outside.

According to above-mentioned traditional drainage pump, waste water can occur and spill perforation, splash on the motor, the situation that causes motor to damage, covering on the top of housing bore opened in described perforation.

So, in traditional drainage pump, must above the perforation of lid, a dish type shift plate be contained on the machine shaft, thereby prevent that waste water from spilling from perforation.

In some cases, the shift plate of traditional drainage pump moves towards motor, so shift plate runs into the support of motor, thereby makes the peripheral part vibration of shift plate, produces noise.

Drainage pump provided by the invention has a shift plate that prevents to run into motor, and also has the good transmission shaft bearing of greasy property that is contained in the motor.

In order to realize above-mentioned task, drainage pump provided by the invention comprises a shift plate that is installed on the motor transmission shaft, described motor is used to drive the rotation blade that rotates in the housing of pump, wherein described shift plate is arranged on described rotation blade and one between the collar on the described transmission shaft, this collar comprises a dish type flange and a cylindricality partly.

According to one embodiment of present invention, this drainage pump is characterised in that a cylindricality end face partly of the described collar forms the surface that receives lubricant oil, and lubricant oil is used for the bearing of lubricated described motor, and described flange is arranged on the other end of this collar.

According to this embodiment, can avoid the shift plate of pump to move towards motor, simultaneously, this structure can be effectively be lubricated the bearing of motor transmission shaft.

Fig. 1 is the local lateral sectional view of drainage pump of the present invention; With

Fig. 2 is the schematic representation of the major component of explanatory drawing 1.

The side view of Fig. 1 is represented the part of drainage pump of the present invention, and Fig. 2 is the enlarged view of Fig. 1 major component.

The pump housing of drainage pump of the present invention represents with label 10 that generally this pump housing comprises a pump case and a rotation blade 30 that is contained in this pump case, and described pump case comprises a housing 20 and a lid 22.Housing 20 has a waste water suction port 21a and a floss hole 21b, and these two mouths are communicated with pump chamber 21c.

The center of the lid 22 on housing 20 tops has perforation 24, and drive axle of motor 60 is passed this hole 24, axle is inserted in the hole 34, the end in this hole on axle unit 32,, and described axle unit is contained on the rotation blade 30.

Motor 50 has a stator 51 that is installed in this motor outside.Have a rotor 54 to be contained in the last lower support frame 52 of stator 51 in addition, it drives drive axle of motor 60 rotations.With two upper area and bearing in the

lower area

70 and 80 supporting drive shafts 60 that are arranged on lower support frame 52.

For example bearing 70 and 80 is made of the iron system of porous structure or the sintered alloy of copper system, so bearing has good oil storage performance.The oil-containing member 72 that will be made of felt collar and 82 etc. is inserted in the outside of bearing 70 and 80, with

annular spring

74 and 84 supporting oil-containing members, is close to lower support frame 52.

Drive axle of motor 60 is stretched out the support 52 of motor, and is press fitted in the hole 34, and the bottom in this hole is on the axle 32 of rotation blade 30, and transmission shaft driven rotary blade 30 rotates.Through hole also can be made in the hole 34 of bottom on axle 32.

To be installed to by the shift plate 40 that thin plastic constitutes the axle 32 above, drive axle of motor 60 is passed this shift plate.

In drainage pump of the present invention, a plastics collar 100 is press fitted on the drive axle of motor 60.This collar 100 is made a unit, thereby can easily the collar be installed on the transmission shaft 60.

As shown in Figure 2, the collar 100 comprises a column type part 105 and a dish type flange 110, and dish type flange 110 is contained in the top of shift plate 40.

Shift plate 40 prevents waste water that the blowdown piping (not shown) refluxes out and splashes on the motor by covering the waste water that 22 perforation 24 leaks out.For example when drainage pump is out of service, flange 110 prevents that shift plate 40 from upwards pushing away towards motor.In other words, can run into flange 110 even shift plate 40 moves, this flange does not allow dish 40 move yet, and a little all can not be near motor to make it.In addition, when the diameter of shift plate 40 during, have only the center portion of shift plate 40 to run into flange 110, so the periphery of dish 40 can not vibrate greater than the diameter of flange 110.

In addition, because flange 110 and cylindrical section 105 are an integral body, so during the flange location and the intersect vertical axis of motor transmission shaft 60.Therefore, when blade rotates, minimum noise only occurs, and prevent that flange from running into cover 22 or electric machine support 52.

In addition, form an oil collecting zone 130 of collecting lubricant oil between the upper-end surface 120 of the bearing 80 and the collar 100, this oil collecting zone prevents oil leak.The collar is used as the upper-end surface 120 that connects pasta and relatively is arranged on a certain position with bearing 80, with the distance setting between this end face and the bearing about 0.5mm.

When motor brings into operation, when being begun to rotate by the transmission shaft 60 of bearing 80 supportings, the oil temperature increases, and the viscosity of oil diminishes, and this just causes oil along this leakage.The oil that viscosity diminishes propagates into the upper-end surface 120 of cylindrical section 105, but it rests on the surface 120 by surface tension, forms oil collecting zone 130.

When motor was out of service, the bearing 80 that porous material constitutes was collected in the oil on the upper-end surface 120 of cylindrical section 105, oil collecting zone 130 disappearances according to capillary phenomenon.

This effect of cylindrical section can prevent the oil leakage of lubrication motor bearing.

As mentioned above, drainage pump of the present invention is characterised in that: form a collar that comprises a dish type flange and a cylindrical section on the outer circumferential face of the transmission shaft that passes the pump case lid.This collar has prevented that effectively shift plate from moving towards motor, and also anti-simultaneously sealing splashes on the motor.

In addition, the upper-end surface of the collar forms oil collecting zone as the receiving plane of motor bearings lubricant oil between this upper-end surface and bearing.Utilize oil surface tension that oil is kept in position.Constitute bearing with porous sintered alloy etc., utilize the capillary phenomenon of bearing to be collected in oil on the oil collecting zone.

Claims

1. drainage pump comprises:

A rotatable rotation blade that is arranged in the pump case;

One has the motor that is used to drive the transmission shaft that described rotation blade rotates; With

A shift plate that is contained on the described transmission shaft, wherein said shift plate are arranged between described rotation blade and the collar, and this collar is contained on the described transmission shaft, and the described collar comprises a dish type flange and a cylindrical section.

2. drainage pump according to claim 1, the cylindricality of a wherein said collar end face partly forms the surface that receives lubricant oil, and lubricant oil is used for lubricated described motor bearings, and described flange is arranged on the other end of this collar.