CN207701376U - A kind of axial-flow pump with long service life - Google Patents

Abstract

A kind of axial-flow pump with long service life, the utility model is related to hydraulic engineering technical fields；It after the upper end of shaft passes through the outlet end of bend pipe upper end, is connect with driving mechanism by shaft coupling, upper bearing (metal) is equipped between shaft and outlet end, stuffing box is equipped in upper bearing (metal) upper end, the upper end of stuffing box is equipped with end cap；It also includes protection loop bar；The upper end of protection loop bar and the lower end of outlet end is connected and fixed；It is threaded through in the middle part of the bearing in protection loop bar, and is equipped with stage casing bearing between the lower port of protection loop bar, which is connected and fixed by fixing screws and the lower end of protection loop bar.It can play certain positioning action to the pump shaft positioned at stage casing inside pump case, avoid its damage that fractures because of long-term high speed rotation, while can also avoid it by liquid corrosions such as water, greatly improve its service life, practicability is stronger.

Description

A kind of axial-flow pump with long service life

Technical field

The present invention relates to hydraulic engineering technical fields, and in particular to a kind of axial-flow pump with long service life.

Background technology

The pump that the active force that axial-flow pump generates liquid by the blade of rotary blade makes liquid convey in the axial direction.Axis stream Impeller of pump is equipped with 2 ~ 7 blades, is rotated in tubular pump case.Fixed guide vane is housed, to eliminate on the pump case of upper impeller The rotary motion of liquid is allowed to become being axially moved, and the kinetic energy of rotary motion is changed into pressure energy.Axial-flow pump is typically single Stage type is made in grade formula, minority.Range of flow is very big, be 180 ~ 360 ten thousand steres/when;Lift is generally at 20 meters or less.Axis stream Pump is generally vertical, and impeller is immersed under water, also there is horizontal or inclined axial flow.The impeller installation site of small axial flow pump is high When going out the water surface, need to be started with vacuum pump discharges diversion.The blade of axial-flow pump is divided to fixed and adjustable two kinds of structures.Big profile shaft The applying working condition (referring mainly to flow) of stream pump often needs to make larger variation in operation, and the established angle of regulation blade can make pump exist High efficient area operation is maintained under different operating modes.The blade angle of pony pump is usually fixed.Axial-flow pump belongs to dynamical type Highest one kind of specific revolution in pump, specific revolution are 500 ~ 1600.Flow-lift of pump, flow-shaft power characteristic curve are small Flow area is steeper, therefore should avoid running in this unstable small flow area.Shaft power of the axial-flow pump in zero delivery is maximum, because This pump must first open the valve on discharge line before activation, to reduce startup power.Axial-flow pump is primarily adapted for use in low lift, big The occasion of flow, as irrigated, draining flooded fields, dock drains, the water level regulation of canal ship lock, or is used as power plant's System in Large Circulating Water Pump.It raises The higher axial-flow pump of journey (twin-stage is made when necessary) is used for the hydraulic jet propulsion of shallow draft ship.

Shaft in axial-flow pump is longer, is threaded through middle section in pump case space there is no any support member, It is chronically in running at high speed, is susceptible to damage, it would be highly desirable to improve.

Invention content

In view of the defects and deficiencies of the prior art, the present invention intends to provide a kind of simple in structure, reasonable design makes With the axial-flow pump for being convenient to use long lifespan, certain positioning action can be played to the pump shaft positioned at stage casing inside pump case, Its damage that fractures because of long-term high speed rotation is avoided, while it can also be avoided by liquid corrosions such as water, greatling improve it makes With the service life, practicability is stronger.

To achieve the above object, the technical solution adopted by the present invention is：It include guide vane pipe, suction tube, bend pipe, blade, Shaft, shaft coupling, upper bearing (metal), stuffing box, end cap, lower bearing, guide vane；The lower end of guide vane pipe, which is bolted, is fixed with attraction The inner wall of pipe, guide vane pipe is fixed with guide vane, is connect with shaft by lower bearing in the middle part of guide vane, and the lower end of shaft is connected with blade, In blade setting and suction tube；After the upper end of shaft passes through the outlet end of bend pipe upper end, it is connect with driving mechanism by shaft coupling, It is equipped with upper bearing (metal) between shaft and outlet end, stuffing box is equipped in upper bearing (metal) upper end, the upper end of stuffing box is equipped with end cap；It is also wrapped The loop bar containing protection；The upper end of protection loop bar and the lower end of outlet end is connected and fixed；It is threaded through in the middle part of the bearing It protects in loop bar, and is equipped with stage casing bearing between the lower port of protection loop bar, which passes through fixing screws and protection The lower end of loop bar is connected and fixed.

Further, the lower end of the protection loop bar is set in the inner space of guide vane pipe.

Further, the lower port of the suction tube, which is bolted, is fixed with filter screen.

Further, the inner wall of the guide vane pipe is equipped with slot holder；The inner wall of the slot holder is equipped with non-slip mat；Institute The outer edge for the guide vane stated is plugged in slot holder.

Further, the outer diameter of the protection loop bar is in gradually increase trend setting from the bottom to top.

With the above structure, the present invention has the beneficial effect that：A kind of axial-flow pump with long service life of the present invention, Certain positioning action can be played to the pump shaft positioned at stage casing inside pump case, avoid its damage that fractures because of long-term high speed rotation It is bad, while it can also be avoided by liquid corrosions such as water, its service life is greatlyd improve, practicability is stronger, and the present invention has It is simple in structure, the advantages that setting is reasonable, low manufacture cost.

Description of the drawings

In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this Some embodiments of invention without having to pay creative labor, may be used also for those of ordinary skill in the art With obtain other attached drawings according to these attached drawings.

Fig. 1 is the structural schematic diagram of the present invention.

Fig. 2 is the connection diagram of guide vane and guide vane pipe in the present invention.

Fig. 3 is the structural schematic diagram of slot holder in the present invention.

Reference sign：

Guide vane pipe 1, suction tube 2, bend pipe 3, outlet end 3-1, blade 4, shaft 5, shaft coupling 6, upper bearing (metal) 7, stuffing box 8, End cap 9, lower bearing 10, guide vane 11, protection loop bar 12, stage casing bearing 13, fixing screws 14, filter screen 15, bolt 16, slot holder 17, non-slip mat 18.

Specific implementation mode

The present invention will be further described below with reference to the drawings.

Referring to as shown in Figure 1-Figure 3, present embodiment the technical solution adopted is that：It includes guide vane pipe 1, suction tube 2, bend pipe 3, blade 4, shaft 5, shaft coupling 6, upper bearing (metal) 7, stuffing box 8, end cap 9, lower bearing 10, guide vane 11；Under guide vane pipe 1 End, which is bolted, is fixed with suction tube 2, and the inner wall of guide vane pipe 1 is fixed with guide vane 11, and 11 middle part of guide vane passes through lower bearing 10 Connect with shaft 5, the lower end of shaft 5 is connected with blade 4, the setting of blade 4 in suction tube 2；The upper end of shaft 5 passes through bend pipe 3 It after the outlet end 3-1 of upper end, is connect with driving mechanism by shaft coupling 6, upper bearing (metal) 7 is equipped between shaft 5 and outlet end 3-1, Stuffing box 8 is equipped in 7 upper end of upper bearing (metal), the upper end of stuffing box 8 is equipped with end cap 9；It also includes protection loop bar 12；The protection The upper end of loop bar 12 and the lower end of outlet end 3-1 are an integral structure（The lower port of outlet end 3-1 extends downwardly to obtain protective case Bar 12）；The middle part of the bearing 5 is threaded through in protection loop bar 12, and is equipped with stage casing between the lower port of protection loop bar 12 Bearing 13, the stage casing bearing 13 are connected and fixed by fixing screws 14 and the lower end of protection loop bar 12.

Further, the lower end of the protection loop bar 12 is set in the inner space of guide vane pipe 1.

Further, the lower port of the suction tube 2 is fixedly connected with filter screen 15 by bolt 16.

Further, the inner wall of the guide vane pipe 1 is equipped with slot holder 17；The inner wall of the slot holder 17 is equipped with anti-skidding Pad 18；The outer edge of the guide vane 4 is plugged in slot holder 17.

Further, the outer diameter of the protection loop bar 12 is in gradually increase trend setting from the bottom to top, increases protective case Stability between 3 inner wall of 12 upper end of bar and bend pipe.

The working principle of this specific embodiment:：The stage casing of shaft 5 is set in protection loop bar 12, and utilizes stage casing axis It holds 13 to be fixed, plays certain stabilization, shaft 5 is avoided to fracture during long-term high speed rotation damage, Shaft 5 can also be avoided to be chronically in the liquid of water simultaneously to be corroded, increase the service life of shaft 5, in 2 port of suction line The filter screen 5 of setting can play the role of the contaminant filter in the liquid such as water, and effective protection pumps intra vane.

With the above structure, present embodiment has the beneficial effect that：A kind of use described in present embodiment The axial-flow pump of long lifespan can play certain positioning action to the pump shaft positioned at stage casing inside pump case, avoid it because long-term High speed rotation and the damage that fractures, while it can also be avoided by liquid corrosions such as water, its service life is greatlyd improve, practicability Stronger, the present invention has the advantages that simple in structure, setting is reasonable, low manufacture cost.

The above is merely illustrative of the technical solution of the present invention and unrestricted, and those of ordinary skill in the art are to this hair The other modifications or equivalent replacement that bright technical solution is made, as long as it does not depart from the spirit and scope of the technical scheme of the present invention, It is intended to be within the scope of the claims of the invention.

Claims (5)

1. a kind of axial-flow pump with long service life, it includes guide vane pipe, suction tube, bend pipe, blade, shaft, shaft coupling, upper axis It holds, stuffing box, end cap, lower bearing, guide vane；The lower end of guide vane pipe, which is bolted, is fixed with suction tube, the inner wall of guide vane pipe It is fixed with guide vane, is connect with shaft by lower bearing in the middle part of guide vane, the lower end of shaft is connected with blade, blade setting and suction tube It is interior；After the upper end of shaft passes through the outlet end of bend pipe upper end, it is connect with driving mechanism by shaft coupling, between shaft and outlet end Equipped with upper bearing (metal), stuffing box is equipped in upper bearing (metal) upper end, the upper end of stuffing box is equipped with end cap；It is characterized in that：It also includes to protect Sheath rod；The upper end of protection loop bar and the lower end of outlet end is connected and fixed；Protection is threaded through in the middle part of the bearing In loop bar, and stage casing bearing is equipped between the lower port of protection loop bar, which passes through fixing screws and protection loop bar Lower end be connected and fixed.

2. a kind of axial-flow pump with long service life according to claim 1, it is characterised in that：Under the protection loop bar End is set in the inner space of guide vane pipe.

3. a kind of axial-flow pump with long service life according to claim 1, it is characterised in that：The lower end of the suction tube Mouth, which is bolted, is fixed with filter screen.

4. a kind of axial-flow pump with long service life according to claim 1, it is characterised in that：The inner wall of the guide vane pipe Equipped with slot holder；The inner wall of the slot holder is equipped with non-slip mat；The outer edge of the guide vane is plugged in slot holder.

5. a kind of axial-flow pump with long service life according to claim 1, it is characterised in that：Outside the protection loop bar Diameter is in gradually increase trend setting from the bottom to top.