CN2799918Y

CN2799918Y - Sectional multistage self-priming pump

Info

Publication number: CN2799918Y
Application number: CN 200520107617
Authority: CN
Inventors: 关醒凡; 罗瑞祥
Original assignee: CHANGSHA CANON PUMP Co Ltd
Current assignee: CHANGSHA CANON PUMP Co Ltd
Priority date: 2005-05-20
Filing date: 2005-05-20
Publication date: 2006-07-26
Anticipated expiration: 2015-05-20

Abstract

The utility model relates to a multistage pump, particularly a stage type multistage self-suction pump with strong self-suction function. The utility model aims at providing a multistage self-suction pump with strong self-suction function which can solve the problem that each time when a water pump starts, vacuum production is needed; or the problem of water pouring and diversion under the premise that the cost or an auxiliary apparatus is not increased. The sectional type multistage self-suction pump is characterized in that a water outlet section is provided with a high-volume gas-liquid separation chamber; a water outlet is arranged above the gas-liquid separation chamber; a refluxing hole is arranged below a final-stage guide blade; gaps are arranged between a central hole of the water outlet section and a shaft sleeve, and are communicated with gaps between the final-stage guide blade and the final-stage impeller; a balancing chamber is arranged behind the water outlet section; a balancing disc is arranged in the balancing chamber; the balancing disc is a floating fluid lubricating bearing, and gaps leaking from the axial direction and the direction perpendicular to the axial direction are arranged between the balancing disc and the water outlet section; the gaps between the water outlet section and the shaft sleeve are communicated with the balancing chamber by the gaps between the water outlet section and the balancing disc; the balancing chamber is connected with a water inlet chamber by a balancing pipe.

Description

The multistage self-priming pump of sectional type

Technical field

The utility model relates to a kind of multistage pump, and this multistage pump has strong self-absorption function.The utility model purpose is, a kind of multistage self-priming pump is provided, and this pump can not improve cost of production, not increase under the prerequisite of supplementary equipment of too much complexity, solves that the each startup of water pump all needs to be evacuated or the problem of water, has strong self-absorption function.

Background technique

As shown in Figure 2, be the schematic diagram of multistage pump in the prior art.This multistage pump comprises: inlet segment 1, stage casing 2 and water exit end 3, and water pump spindle 5 runs through the center of each section.

The water intake 16 of water pump and intake chamber 14 are arranged on the inlet segment 1, and water intake 16 communicates with intake chamber 14, form the suction runner of water pump, suck runner current are imported first stage impeller.Inlet segment 1 center has axis hole, and axis hole and axle sleeve are Spielpassung

The stage casing has the structure of being made up of impeller 17, stator 18 and housing 19.Match with inlet segment 1 flow field end circular open in impeller 17 front shroud import positions.Impeller 17 wheel hubs have axis hole, with key impeller are fixed on the axle.Blade is evenly arranged between front shroud and the wheel hub, and front shroud and wheel hub are fused.Impeller 17 rears are equipped with stator 18, by housing 19 impeller 17 and stator 18 are covered then, and housing 19 is " recessed " shape, and the end plane of opening one end and inlet segment 1 compresses sealing.As mentioned above, with identical method the next stage structure is installed again.

The impeller 9 and the final stage stator 6 of structure as hereinbefore are housed in the water exit end 3, are installed in 2 final stage housings, 19 rears, stage casing, water exit end 3 inner chambers are the water-supplying chamber 20 of water pump, and water-supplying chamber 3 links to each other with water outlet 15, form the outlet passage of pump.

The multistage pump structure by water pump spindle impeller high speed rotating, thereby makes the liquid in the blade interval enter the housing in stage casing by stator under action of centrifugal force, and transmits downwards step by step, up to water outlet as mentioned above.

Adopt that as above structure multistage pump advantage is well-known.But deficiency is: start multistage pump all needs vacuum pump to be evacuated or water at every turn, just can make its proper functioning; Adopt the method that bottom valve is installed, can cause the loss of energy; Vacuum pump and installation bottom valve all can make cost improve.Though self-priming multistage pump is also arranged now, complicated auxiliary device realizes by having increased, cost height not only, and complex structure, and also difficult in maintenance, poor stability.

The model utility content

The utility model is exactly that it is a kind of simple in structure, easy to maintenance, with low cost that its purpose is to provide, and have the multistage self-priming pump of sectional type of strong self-absorption function in order to solve existing problem.

On the basis of existing technology, the utility model improves water exit end, thereby obtained the multistage self-priming pump of sectional type of the present utility model, the drawback that the multistage pump of having removed prior art from all must use vacuum pump or water to run well when each the startup.

According to the multistage self-priming pump of the sectional type shown in the utility model, comprising: inlet segment, stage casing and water exit end, and water pump spindle runs through the center of each section;

Wherein, described water exit end is provided with the gas-liquid separation chamber of big volume;

The top of described gas-liquid separation chamber sets out the mouth of a river;

The bottom of final stage stator offers return port;

Have the gap between described water exit end center hole and the axle sleeve, and be communicated with space between final stage stator and the impeller; The water exit end rear is provided with the balance cylinder, has Balance disc in the balance cylinder, therefore move left and right can take place for floating fluid lubricated bearing in this Balance disc under the effect of pump internal pressure differences, and with water exit end between produce axially on the face that contacts and the slit of vertical axial leakage; Gap between water exit end and the axle sleeve is connected with the balance cylinder with gap between the Balance disc by water exit end; Described balance cylinder links to each other with intake chamber by balance tube.

Because the multistage self-priming pump of sectional type of the present utility model is provided with the gas-liquid separation chamber of big volume at water exit end, therefore, when pump startup, the water and the air that remain in the pump together suck in this gas-liquid separation chamber, and, air and liquid are separated because enough spaces are arranged.The air that separates is just discharged from the water outlet on gas-liquid separation chamber top; The liquid that separates accumulates in the gas-liquid separation chamber.

Owing to be provided with return port in final stage stator bottom, and behind the space of return port by final stage stator and impeller, again by the gap between final stage stator and the axle sleeve, again by the space between Balance disc and the water exit end axis hole, and then the slit of the vertical axial by Balance disc and water exit end end, link to each other with the balance cylinder, the balance cylinder links to each other with intake chamber by balance tube, therefore under pressure, liquid in the gas-liquid separation chamber will be back to intake chamber from gas-liquid separation chamber through above-mentioned path.

Therefore, in the multistage self-priming pump start-up course of sectional type of the present utility model, in water pump body, always retained a certain amount of water, played the effect of water, can constantly the air in the intake pipe be extracted out, the multistage pump of therefore having exempted prior art all needs to pour into the trouble of enough waters in pump when each the startup.

According to the multistage self-priming pump of sectional type of the present utility model, described entery and delivery port is provided with vertically upward, and it highly is higher than high-order bit, stage casing.Like this when guaranteeing termination of pumping in the pump surplus water be full of pump chamber, liquid that can not runs off from entery and delivery port, thus the purpose that does not need water or vacuumize when reaching next turn on pump.

As mentioned above, the multistage self-priming pump of sectional type of the present utility model not only has the advantage of common multistage self-priming pump, and the irrealizable self-absorption function of the multistage pump that can realize prior art, its application area is more extensive, as long as in pump, add enough water when after installation, using for the first time, each later on the use can continue to use later the interior resident water of pump promptly can realize self-absorption function, needn't start at every turn and all adopt water, and removed bottom valve from, can reduce the former waste of energy, needn't increase complicated vacuum pump, save cost greatly; And compare with common self-priming pump, it safeguards simple, safeguards simple, with low cost; Therefore, has wider application area.

Description of drawings

Fig. 1 is the structure principle chart according to the multistage self-priming pump of sectional type of the present utility model.

Fig. 2 is the structure principle chart of the multistage pump of prior art.

Major component symbol description among the figure

1, inlet segment 2, stage casing

3, water exit end 4, gas-liquid separation chamber

5, water pump spindle 6, final stage stator

7, return port 8, gap

9, impeller 10, balance cylinder

11, Balance disc 12, slit

13, balance tube 14, intake chamber

15, water outlet 16, water intake

17, impeller 18, stator

19, housing 20, water-supplying chamber

Embodiment

Below in conjunction with accompanying drawing specific embodiment of the utility model is elaborated.

As shown in Figure 1, the multistage self-priming pump of sectional type of the present utility model comprises: inlet segment 1, stage casing 2 and water exit end 3.Water exit end 3 is provided with the gas-liquid separation chamber 4 of big volume, and water pump spindle 5 runs through the center of each section; Difference from prior art is: described water exit end 3 is provided with the gas-liquid separation chamber 4 of big volume; Return port 7 is offered in described final stage stator 6 bottoms.

Have gap 8 between described water exit end 3 center holes and the axle sleeve, and be communicated with space between final stage stator 6 and the impeller 9; Water exit end 3 rears are provided with balance cylinder 10, and Balance disc 11 is installed in the balance cylinder 10, and this Balance disc 11 is the fluid lubricated bearing that floats, and and water exit end 3 between have axially and the slit 12 of vertical axial leakage; Gap 8 between water exit end 3 and the axle sleeve is connected with balance cylinder 10 with slit 12 between the Balance disc by water exit end; Described balance cylinder 10 links to each other with intake chamber 14 by balance tube 13.

As shown in Figure 1, the arrow express liquid flows to.Because water exit end 3 designs of the multistage self-priming pump of sectional type of the present utility model have the gas-liquid separation chamber 4 of big volume, therefore, when pump startup, the water and the air that remain in the pump together suck in this gas-liquid separation chamber 4, and, air and liquid are separated because enough spaces are arranged.The air that separates is just discharged from the water outlet 15 on gas-liquid separation chamber 4 tops; The liquid that separates accumulates in gas-liquid separation chamber 4 bottoms.

Under pressure, liquid in the gas-liquid separation chamber 4 is through the slit 12 of gap 8, Balance disc 11 and the water exit end 3 of space, water exit end 3 and the axle sleeve of return port 7, final stage stator 6 and impeller 9, be back to balance cylinder 10, be back in the intake chamber 14 of inlet segment 1 through balance tube 13 again.Thereby guarantee the multistage self-priming pump of sectional type of the present utility model when starting, the enough liquid of total preservation in the pump housing, and utilize the liquid of preserving that the air in the inlet pipeline is discharged, to realize the function of self-priming pump.

The multistage self-priming pump of sectional type in the present embodiment, water intake 16, water outlet 15 are provided with vertically upward, and it highly is higher than high-order bit, stage casing.Like this when guaranteeing termination of pumping in the pump surplus water be full of pump chamber, liquid that can not runs off from entery and delivery port, thus the purpose that does not need water or vacuumize when reaching next turn on pump.

Therefore, use the multistage self-priming pump of the utility model sectional type only to need when installing and using for the first time, in pump, to add enough waters, and when restarting later on, then can use the water that retains in the pump housing to get final product.Therefore the utility model passes through the multistage pump improvement structurally to prior art, and need not add bottom valve or vacuum pump, just can realize the function of self-priming pump.

In sum, the related work personnel can carry out various change and modification fully in the scope that does not depart from the utility model technological thought.Therefore, the technical scope of this model utility is not limited to the content on the specification, must determine its technical scope according to interest field.

Claims

1, the multistage self-priming pump of a kind of sectional type comprises: inlet segment, stage casing and water exit end, and water pump spindle runs through the center of each section; It is characterized in that:

Described water exit end is provided with the gas-liquid separation chamber of big volume;

The bottom of final stage stator offers return port;

Have the gap between described water exit end center hole and the axle sleeve, and be communicated with space between final stage stator and the impeller; The water exit end rear is provided with the balance cylinder, has Balance disc in the balance cylinder, and this Balance disc is for floating fluid lubricated bearing, and and water exit end between have the slit of axial leakage; Gap between water exit end and the axle sleeve is connected with the balance cylinder with gap between the Balance disc by water exit end; Described balance cylinder links to each other with intake chamber by balance tube.

2, according to the multistage self-priming pump of the described sectional type of claim 1, it is characterized in that: water intake and water outlet are provided with vertically upward, and it highly is higher than high-order bit, stage casing.