CN209638077U - High-performance guide-vane single-stage cantilever centrifugal pump - Google Patents

Abstract

The utility model discloses a kind of high-performance guide-vane single-stage cantilever centrifugal pump, entrance and exit including shell and setting on the housing, the liquid guiding cavity being interconnected with the entrance and exit is equipped in the shell, a perforative shaft is equipped in the shell, double-entry impeller and single suction secondary impeller are fixed in the shaft, along the axis direction of the double-entry impeller and single suction secondary impeller, the distance between the inner wall of the double-entry impeller and the leaf top end face of single suction secondary impeller and the shell is blade tip clearance, guide vane is equipped between the double-entry impeller and single suction secondary impeller and the inner wall of the shell, to control the size of blade tip clearance.The beneficial effects of the utility model are mainly reflected in: structure is simple, deft design, is easily assembled using blade tip clearance adjustable structure, realize pump performance it is adjustable, different engines can be met to turbine pump performance requirement, significantly improve properties of product adaptability.

Description

High-performance guide-vane single-stage cantilever centrifugal pump

Technical field

The utility model relates to pump class, specifically, more particularly to a kind of high-performance guide-vane single-stage cantilever centrifugal pump.

Background technique

Main wasted work equipment of the centrifugal pump as petrochemical industry, metallurgy and power industry, is widely used in national economy In every field.As the requirement of energy-saving and emission-reduction is higher and higher, centrifugal pump is also constantly to high-performance, the direction of low power consuming Development.

Centrifugal pump has the diversified forms such as vertical, horizontal, single-stage, multistage, single suction, double suction, self-priming.Centrifugal pump is to utilize leaf Wheel rotates and makes water that centrifugal movement occur and carry out work.Water pump is before activation, it is necessary to make full of water in pump case and suction hose, then Start motor, pump shaft impeller and water is made to do high speed rotary motion, water occurs centrifugal movement, impeller outer edge is thrown toward, through snail The runner of shape pump case flows into the pressure pipe road of water pump.

As Authorization Notice No. CN206246410U discloses a kind of centrifugal pump with double-entry impeller, including shell and setting Entrance and exit on the housing, and the entrance and exit is located at the same side of the shell, is equipped in the shell One perforative shaft is fixed with a double-entry impeller in the shaft, and the first suction chamber, the second sucking are additionally provided in the shell Chamber and outflow chamber, first suction chamber, the second suction chamber are located at the two sides of the double-entry impeller and are symmetrical structure, and described the One suction chamber, the second suction chamber are also connected with the entrance and the outflow chamber；A single suction is also fixed in the shaft Secondary impeller, flow channel for liquids is additionally provided in the shell and circulation pipe, the flow channel for liquids are located at the single suction secondary impeller Side and it is connected with circulation pipe and the outlet, the circulation, which is managed, to be also connected with the outflow chamber.The patent exists as follows Disadvantage, the size of impeller blade tip clearance will affect the service performance of pump, and in above-mentioned patent, blade tip clearance is bigger, pump performance ratio It is poor, it increases fluid media (medium) and is lost in blade tip clearance secondary flow, thus volumetric loss before increasing pump.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art, provide a kind of high-performance guide-vane single-stage cantilever Centrifugal pump.

The purpose of this utility model is achieved through the following technical solutions:

A kind of high-performance guide-vane single-stage cantilever centrifugal pump including shell and is arranged entrance on the housing and goes out Mouthful, it is equipped with the liquid guiding cavity being interconnected with the entrance and exit in the shell, is equipped with a perforative shaft in the shell, Double-entry impeller and single suction secondary impeller are fixed in the shaft, along the axis side of the double-entry impeller and single suction secondary impeller To the distance between leaf top end face and the inner wall of the shell of the double-entry impeller and single suction secondary impeller are between leaf top Gap is equipped with guide vane between the double-entry impeller and single suction secondary impeller and the inner wall of the shell, to control blade tip clearance Size.

Preferably, the guide vane is annular in shape, offers diversion trench, the direction of the diversion trench and the liquid guiding cavity thereon It is identical that interior medium flows to direction.

Preferably, one group of threaded hole is offered on the guide vane, described in a bolt-through to match with the threaded hole Threaded hole by the guide vane locking on the housing.

Preferably, the liquid guiding cavity includes setting in intracorporal first suction chamber of the shell, the second suction chamber and flows out chamber, First suction chamber and the second suction chamber are arranged in the two sides of the double-entry impeller in symmetrical structure, first suction chamber, Second suction chamber, entrance and the outflow chamber are interconnected；The liquid guiding cavity further include interconnected flow channel for liquids and with The circulation pipe that the outflow chamber is connected, the flow channel for liquids is connected with the outlet, and is located at the single suction secondary impeller Side.

Preferably, the double-entry impeller is double shrouded wheel comprising double-entry impeller main body, double suction front shroud and double suction rear cover Plate, for preceding liquid outflow chamber between the double-entry impeller main body and double suction front shroud, rear liquid outflow chamber is located at the double suction Between impeller bodies and double suction back shroud, the double-entry impeller main body axis is coaxial with the inlet axis.

Preferably, the single suction secondary impeller includes single suction secondary impeller main body and single suction cover board, the flow channel for liquids position Between the single suction secondary impeller main body and single suction cover board, the single suction secondary impeller main body axis and the outlet axes are total Axis.

Preferably, the outflow chamber includes at least preceding liquid outflow chamber and rear liquid flows out chamber.

Preferably, the input terminal of the shaft is equipped with a swivel bearing, and the motor shaft of the input terminal and motor is fixed Connection.

Preferably, the distance of the single suction secondary impeller to the input terminal is greater than the double-entry impeller to the input terminal Distance.

Preferably, the output end of the shaft is equipped with an angular contact ball bearing.

The beneficial effects of the utility model are mainly reflected in: structure is simple, deft design, using the adjustable knot of blade tip clearance Structure is easily assembled, realize pump performance it is adjustable, different engines can be met to turbine pump performance requirement, significantly improve product Adapting to property.

Detailed description of the invention

Technical solutions of the utility model are described further with reference to the accompanying drawing:

Fig. 1: the utility model structure diagram；

Part A enlarged drawing in Fig. 2: Fig. 1；

Fig. 3: the perspective view of guide vane in the utility model.

Specific embodiment

The utility model is described in detail below with reference to specific embodiment shown in the drawings.But these embodiment party Formula is not limited to the utility model, structure that those skilled in the art are made according to these embodiments, method or Transformation functionally is all contained in the protection scope of the utility model.

As shown in Figure 1 to Figure 3, the utility model discloses a kind of high-performance guide-vane single-stage cantilever centrifugal pump, including shell Body 1 and the entrance 11 being arranged on the shell 1 and outlet 12, and the entrance 11 and outlet 12 are located at the same of the shell 1 Side, is equipped with a perforative shaft 2 in the shell 1, is fixed with a double-entry impeller 3 by the spline in the shaft 2, The double-entry impeller 3 is located at the underface of the entrance 11, and the double-entry impeller 3 is double shrouded wheel, because of the effect of double shrouded wheel Rate is higher, and the double-entry impeller 3 includes double-entry impeller main body 36, double suction front shroud 37 and double suction back shroud 38, the shell 1 It is inside additionally provided with the first suction chamber 31, the second suction chamber 32 and outflow chamber 35, first suction chamber 31, the second suction chamber 32 are located at The two sides of the double-entry impeller 3 and be symmetrical structure, using double-entry impeller with single-suction (single-in let) impeller compared with have flow greatly, be not easy to produce The characteristics of giving birth to cavitation, greatly enhancing the service life that centrifugal pump uses.

First suction chamber 31, the second suction chamber 32 are also connected with the entrance 11 and the outflow chamber 35；It is described Outflow chamber 35 flows out chamber 33 by the preceding liquid of the double-entry impeller 3 and rear liquid outflow chamber 34 forms, and the preceding liquid flows out chamber 33 between the double-entry impeller main body 36 and double suction front shroud 37, and the rear liquid outflow chamber 34 is located at the double-entry impeller Between main body 36 and double suction back shroud 38,36 axis of double-entry impeller main body and the 11 axis co-axial X1 of entrance, liquid from Enter at the entrance 11, due to 36 axis of double-entry impeller main body and 11 axis co-axial of entrance, so the double-entry impeller 36 uniform force of main body, is hardly damaged.

A single suction secondary impeller 4 is fixed with by the spline in the shaft 2, the single suction secondary impeller 4 is located at The underface of the outlet 12, the single suction secondary impeller 4 generallys use double shrouded wheel, because the efficiency of double shrouded wheel is higher, There is Yang Chenggao using single-suction (single-in let) impeller at this time, while having also improved its flow velocity.The single suction secondary impeller 4 includes that single suction is secondary Impeller bodies 42 and single suction cover board 43, flow channel for liquids 41 is additionally provided in the shell 1 and circulation pipe, the flow channel for liquids 41 are located at The side of the single suction secondary impeller 4 and 12 be connected with circulation pipe and the outlet, the circulation manage also with the outflow chamber 35 are connected.

For the flow channel for liquids 41 between the single suction secondary impeller main body 42 and single suction cover board 43, the single suction is secondary 42 axis of impeller bodies and 12 axis co-axial X2 of the outlet, due to 42 axis of single suction secondary impeller main body and 12 axis of the outlet Line is coaxial, so 42 uniform force of single suction secondary impeller main body, is hardly damaged.

There is an input terminal 21 in the shaft 2, the input terminal 21 is equipped with a swivel bearing 211, and the input terminal 21 are fixedly connected with the motor shaft of motor, and the centrifugal pump shaft is allow to have subtle sliding；The other end of the shaft 2 is equipped with one Output end 22, the output end 22 is equipped with an angular contact ball bearing 221, for balancing axial direction remaining in its described shaft 2 Power.

The designing points of the utility model are: along the axis direction of the double-entry impeller 3 and single suction secondary impeller 4, institute The distance between the inner wall of the leaf top end face and the shell 1 of stating double-entry impeller 3 and single suction secondary impeller 4 is blade tip clearance, The blade tip clearance of the double-entry impeller 3 is equal to the blade tip clearance of the single suction secondary impeller 4 among the above.The size meeting of blade tip clearance The service performance for influencing pump, if blade tip clearance is bigger, pump performance is poor, increases fluid media (medium) in blade tip clearance Secondary Flow Dynamic loss, thus volumetric loss before increasing pump.In the utility model, by the double-entry impeller 3 and single suction secondary impeller 4 with It is equipped with guide vane 7 between the inner wall of the shell 1, to control the size of blade tip clearance, thus realize the adjusting to pump performance, Make it have wider array of applicability.Specifically, the guide vane 7 is annular in shape, specification can do corresponding tune according to actual needs It is whole, offer diversion trench 71 thereon, it is identical that the direction of the diversion trench 71 and medium in the liquid guiding cavity flow to direction, to medium Flow direction plays drainage.One group of threaded hole 72, a bolt 73 to match with the threaded hole 72 are offered on the guide vane 7 The guide vane 7 is locked on the shell 1 through the threaded hole 72, mounting structure is optimized, reduces operation, convenient for more Maintenance is changed, flow path efficiency is improved.

The utility model discloses a kind of simple course of work of the centrifugal pump with double-entry impeller, when motor starts to turn Dynamic, the motor shaft of motor is fixedly connected with the input terminal 21 of the shaft 2, drives the input terminal by the motor shaft rotation of motor 21 rotations, at this point, the shaft 2 rotates, the double-entry impeller 3 and single suction secondary impeller 4 are fixed on institute by the spline It states in shaft 2, so the double-entry impeller 3 and single suction secondary impeller 4 also start turning；Liquid flows into described from the entrance 11 First suction chamber 31 and the second suction chamber 32 are rotated in the double-entry impeller 3, and the liquid drive of first suction chamber 31 is arrived Preceding liquid flows out chamber 33, and the liquid of second suction chamber 32 is driven to the rear liquid and flows out chamber 34, preceding liquid flows out chamber 33 with it is described after liquid outflow chamber 34 forms the outflow chamber 35, liquid summarizes in the outflow chamber 35, the outflow chamber 35 and The circulation pipe is connected, and the liquid flows into the circulation pipe, and the circulation manages and is located at the single suction secondary impeller 4 The flow channel for liquids 41 of side be connected, liquid flows into the flow channel for liquids 41, the flow channel for liquids 41 and the outlet 12 are connected, so that liquid is discharged from pump.

The beneficial effects of the utility model are mainly reflected in: structure is simple, deft design, using the adjustable knot of blade tip clearance Structure is easily assembled, realize pump performance it is adjustable, different engines can be met to turbine pump performance requirement, significantly improve product Adapting to property.

It should be appreciated that although this specification is described in terms of embodiments, but not each embodiment only includes one A independent technical solution, this description of the specification is merely for the sake of clarity, and those skilled in the art should will say As a whole, the technical solution in each embodiment may also be suitably combined to form those skilled in the art can for bright book With the other embodiments of understanding.

Tool of the series of detailed descriptions listed above only for the feasible embodiment of the utility model Body explanation, they are all without departing from made by the utility model skill spirit not to limit the protection scope of the utility model Equivalent implementations or change should be included within the scope of protection of this utility model.

Claims (10)

1. high-performance guide-vane single-stage cantilever centrifugal pump, including shell (1) and the entrance (11) being arranged on the shell (1) and It exports (12), the liquid guiding cavity interconnected with the entrance (11) and outlet (12) is equipped in the shell (1), feature exists In: it is equipped with a perforative shaft (2) in the shell (1), double-entry impeller (3) and single suction are fixed on the shaft (2) Grade impeller (4), along the axis direction of the double-entry impeller (3) and single suction secondary impeller (4), the double-entry impeller (3) and single suction The leaf top end face of secondary impeller (4) and the distance between the inner wall of the shell (1) are blade tip clearance, the double-entry impeller (3) it is equipped between single suction secondary impeller (4) and the inner wall of the shell (1) guide vane (7), to control the big of blade tip clearance It is small.

2. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 1, it is characterised in that: the guide vane (7) is in Annular shape offers diversion trench (71) thereon, and direction and the medium in the liquid guiding cavity of the diversion trench (71) flow to direction phase Together.

3. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 2, it is characterised in that: on the guide vane (7) One group of threaded hole (72) is offered, one runs through the threaded hole (72) for institute with the bolt (73) that the threaded hole (72) match Guide vane (7) is stated to be locked on the shell (1).

4. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 3, it is characterised in that: the liquid guiding cavity includes The first suction chamber (31), the second suction chamber (32) and outflow chamber (35) being arranged in the shell (1), first suction chamber (31) it is arranged in symmetrical structure in the two sides of the double-entry impeller (3) with the second suction chamber (32), first suction chamber (31), Second suction chamber (32), entrance (11) and the outflow chamber (35) are interconnected；The liquid guiding cavity further includes interconnected Flow channel for liquids (41) and the circulation pipe being connected with outflow chamber (35), the flow channel for liquids (41) and described outlet (12) phase Connection, and it is located at the side of the single suction secondary impeller (4).

5. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 4, it is characterised in that: the double-entry impeller It (3) is double shrouded wheel comprising double-entry impeller main body (36), double suction front shroud (37) and double suction back shroud (38), preceding liquid flow Between the double-entry impeller main body (36) and double suction front shroud (37), rear liquid outflow chamber (34) is located at described chamber (33) out Between double-entry impeller main body (36) and double suction back shroud (38), double-entry impeller main body (36) axis and the entrance (11) axis Line is coaxial (X1).

6. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 5, it is characterised in that: the single suction secondary leaf Wheel (4) includes single suction secondary impeller main body (42) and single suction cover board (43), and it is secondary that the flow channel for liquids (41) is located at the single suction Between impeller bodies (42) and single suction cover board (43), single suction secondary impeller main body (42) axis and described outlet (12) axis Coaxial (X2).

7. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 6, it is characterised in that: the outflow chamber (35) Including at least preceding liquid outflow chamber (33) and rear liquid outflow chamber (34).

8. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 7, it is characterised in that: the shaft (2) Input terminal (21) is equipped with a swivel bearing (211), and the input terminal (21) is fixedly connected with the motor shaft of motor.

9. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 8, it is characterised in that: the single suction secondary leaf The distance for taking turns (4) to the input terminal (21) is greater than the distance of the double-entry impeller (3) to the input terminal (21).

10. high-performance guide-vane single-stage cantilever centrifugal pump according to claim 9, it is characterised in that: the shaft (2) Output end (22) is equipped with an angular contact ball bearing (221).