CN2537841Y

CN2537841Y - Improved high chromium alloy blade wheel

Info

Publication number: CN2537841Y
Application number: CN 02219274
Authority: CN
Inventors: 蒋龙福; 闵锡君; 沈亦晨
Original assignee: ZHANGZE CHEMICAL EQUIPMENT FAC
Current assignee: ZHANGZE CHEMICAL EQUIPMENT FAC
Priority date: 2002-03-11
Filing date: 2002-03-11
Publication date: 2003-02-26
Anticipated expiration: 2012-03-11

Abstract

The utility model relates to an improvement to the high chrome alloy impeller used for impurity pumps. The utility model is characterized in that a metal axle insert part which is easy to be processed in arranged at the axle hole position of the impeller, the anti-wear characteristic of the high chrome alloy is retained, and the processing difficulty of the impeller axle hole, the guiding groove and the end surface is reduced. The utility model overcomes the defaults that the processing difficulty of the high chrome alloy impeller axle hole of the prior technology is large, and the processing cost is high, and the impeller embedding axle hole does not affect the whole service life. The processing cost of the utility model is low, because the dug weight is one third of the weight of the impeller, the cost of the expensive high chrome alloy material is saved by 20 percent, and the total cost of the high chrome alloy impeller is reduced by 50 percent.

Description

A kind of improved high-chromium alloy impeller

Technical field

Model utility is about to the improvement of transh pump with the high-chromium alloy impeller, relates in particular to impeller axis hole position.

Background technique

The transh pump of widely used transfer ore pulp during the mine smelts for guaranteeing that high wear resistance is arranged, adopts chromium content to reach 27% high-chromium alloy manufacturing usually.Yet high-chromium alloy material hardness is higher, though good wear resistance is arranged, the processing cutting is difficulty comparatively, need fine finishing position such as axis hole and strong groove for some, can only adopt grinding usually, yet grinding is time-consuming, cost is higher, processing charges even surpass cost of material.Especially impurity impeller of pump, its axis hole, keyway and end face area processing is difficulty especially, and time-consuming taking a lot of work.And mainly concentrate on all positions of impeller outer and primary blades and back blades angle of attack place as impeller abrasion-proof erosion position, axis part is because linear velocity is relatively low, fluid scouring power is little, and it is less relatively to wear and tear, and therefore impeller is not serious by axle nearly center portion wearing and tearing in actual use.

Summary of the invention

The purpose of model utility is to overcome the deficiency of above-mentioned prior art, and providing a kind of improvedly neither influences and reduce wear-resisting property, conveniently helps axis hole position cutting again, and has the high-chromium alloy impeller of low manufacture cost.

The model utility purpose realizes, the main improvement is former whole high-chromium alloy impeller, change embedded structure into, be that high-chromium alloy is still adopted in the more serious outside of damage in impeller (radially), the metal insert of inlaying easy processing and certain wear resistance being arranged is then adopted at inboard axis hole position, as spheroidal graphite cast iron, stainless steel etc., thereby constitute the combined impeller be inlaid with the axis hole inserts, the easy greatly processing at impeller axis hole position reduces manufacture cost.Specifically, model utility high-chromium alloy impeller is characterized in that said impeller axis hole position is inlaid with metal axis hole inserts.The model utility metal insert passes through radially, and the complementary fit structure cooperates with impeller, realize rotating synchronously with impeller, said radially complementary fit structure, its effect is to prevent the inserts rotation of sliding in axis hole, can be impeller to be inlayed axis hole position endoporus cooperate by having radial location, realize that inserts is connected with the nonrotational of impeller such as strong groove, non-circular structure, concavo-convex complementation etc. with the inserts periphery.Wherein a kind of better and easier method is by the strong form of class floweriness inserts to be inlaid into the impeller endoporus, and the boss (piece) of similar strong pin promptly radially is set at inserts, inlays the limited impression that the endoporus side face is provided with corresponding admittance projection at impeller.For preventing the inserts axial float, can inlay the shaft hole part endoporus at impeller prevention inserts axial float stop member axially is set, a kind of easier way, be impeller to be inlayed axis hole position endoporus be cast as the middle inner concave shape of two bulge loops like " recessed " shape structure, the inserts projection is admitted at the indent position, the both sides bulge loop has effectively stopped the inserts axial float, by casting resin inserts is fixed again, forms axially and radial location.

Model utility has not only kept former high-chromium alloy impeller abrasion-proof characteristic, and has alleviated the difficulty of processing of impeller axis hole, keyway and end face area owing to change whole high-chromium alloy impeller into be embedded with shaft hole part combined impeller.It is big to have overcome the whole high-chromium alloy impeller of prior art axis hole position difficulty of processing, the defective that processing cost is high, and the nested axis hole of impeller does not influence whole service life.It is low that model utility not only has processing cost, and owing to dig out weight and account for 1/3 of impeller weight, and it is about 20% to save expensive high-chromium alloy material cost, adds the reduction of processing cost, and overall cost can reduce by 50% by more whole high-chromium alloy impeller.

The model utility structure also is applicable to the manufacturing of other difficult processing impellers such as ceramic impeller.

Below in conjunction with several indefiniteness embodiments, further specify model utility.

Description of drawings

Fig. 1 inlays axis hole inserts blade wheel structure schematic representation for model utility.

Fig. 2 is Fig. 1 left side TV structure schematic representation.

Fig. 3 is Figure 1A-A sectional structure schematic representation.

Fig. 4 is inserts and another projection cube structure schematic representation of impeller radial location.

Fig. 5 is the another kind of projection cube structure schematic representation of inserts and impeller radial location.

Fig. 6 is inserts and another projection cube structure schematic representation of impeller radial location.

Fig. 7 inlays axis hole inserts blade wheel structure schematic representation for the model utility another kind.

Embodiment

Embodiment 1: referring to accompanying

drawing

1,2,3, transh pump is formed by the high-chromium alloy casting with high-chromium alloy impeller 1 main body, and big endoporus is left at the impeller center when cast, is inlaid with through hole axis hole inserts 3 in it, and cured resin 2 is filled up in inserts and the cast of impeller endoporus slit.Inserts and impeller fixing is to have " recessed " shape structure by some projections 6 radially being set at inserts, the impeller endoporus being poured into, and promptly leaves the footpath bulge loop 4 and 5 and concaves, and is used to admit the inserts projection, and the front and back bulge loop has effectively prevented the inserts axial float.Inserts is inserted by preceding bulge loop 4 gap portions and rotates, and fills up the slit at inserts and place, impeller endoporus slit cast cured explosive resin then, thereby makes the axis hole inserts after the processing firmly be embedded in the impeller center portion.

Embodiment 2: referring to Fig. 4,5,6, as described above, it can also be to separate various ways such as shape projection 9, hemispherical bumps 10 by what inserts radially was provided with as L shaped projection 8, three that inserts and impeller are inlayed.

Embodiment 3: referring to Fig. 7, as described above, the axis hole inserts can also be that axis hole is a blind hole insert 7, and inserts adopts with rotating shaft and is threaded.

Claims

1, a kind of high-chromium alloy impeller is characterized in that said impeller axis hole position is inlaid with metal axis hole inserts.

2,, it is characterized in that said axis hole inserts radially has projection according to the described high-chromium alloy impeller of claim 1.

3,, it is characterized in that said impeller endoporus is " recessed " shape according to the described high-chromium alloy impeller of claim 2.

4,, it is characterized in that said impeller endoporus groove has positive stop lug boss according to the described high-chromium alloy impeller of claim 3.

5,, it is characterized in that being filled with resin in said inserts and the impeller endoporus slit according to claim 1,2,3 or 4 described high-chromium alloy impellers.