CN215919603U

CN215919603U - Impeller is inlayed to axle center behind thermal energy

Info

Publication number: CN215919603U
Application number: CN202122354240.XU
Authority: CN
Inventors: 沈杰
Original assignee: Yixing Fuxi Machinery Co ltd
Current assignee: Yixing Fuxi Machinery Co ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-03-01
Anticipated expiration: 2031-09-27

Abstract

The utility model discloses an impeller with an embedded axis after thermal expansion, which belongs to the technical field of impeller machining and comprises an impeller, a rotating shaft and three embedding pieces, wherein the impeller is arranged on the rotating shaft, three placing grooves are formed in the impeller, the three embedding pieces are arranged in the placing grooves of the impeller at equal intervals, the rotating shaft is provided with three embedding grooves, the three embedding pieces extend into the three embedding grooves in a heating state, and the three embedding pieces are respectively in sliding fit with the three embedding grooves. The impeller and the rotating shaft are connected together through thermal expansion, and the impeller and the rotating shaft are inlaid together through natural cooling, so that the requirement of integrated high-precision machining and forming is met.

Description

Impeller is inlayed to axle center behind thermal energy

Technical Field

The utility model relates to the technical field of impeller machining, in particular to an impeller with an axis embedded after thermal expansion.

Background

The complete impeller of Roots blower is composed of a middle blade part and two shaft parts at both ends. The impeller and shaft structure of Roots blower is made in two forms: one is formed by integrally casting an impeller and a shaft, and the integral material of the impeller and the shaft needs to be more than the material requirement of QT500 nodular cast iron; but the material requirement of axle is very high, uses and can adopt the requirement casting of whole QT500 above material, and the material quality relative ratio to the foundry goods is higher, and when the material of foundry goods is unstable, or miniature tiny slag inclusion, the crack (surpass the inspection range of detecting a flaw) appear in the impeller axle head in the casting process, very easily cause the roots fan at big moment of torsion hypomere axle accident, often can directly cause the roots fan to scrap directly. The other is that the impeller is HT250 gray cast iron or QT500 nodular cast iron, the axis is No. 45 high-quality carbon steel, and the axis and the impeller are formed by tightly matching key grooves and flat keys; the fixation of the leaves and the shaft is close to a flat key pin, the assembly positioning precision is poor, and the tightness and concentricity of the leaves and the shaft are poor.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an impeller with an axis embedded after thermal expansion, which aims to solve the problems in the prior art.

The embodiment of the utility model adopts the following technical scheme: the utility model provides an impeller is inlayed in axle center behind thermal energy, includes impeller, axis of rotation and three mosaic piece, the impeller sets up in the axis of rotation, be equipped with three standing groove on the impeller, it is three the mosaic piece equidistant setting is in the standing groove of impeller, be equipped with three mosaic groove in the axis of rotation, under the state of heating, it is three the mosaic piece extends to three mosaic inslot, and is three the mosaic piece is respectively with three mosaic groove sliding fit.

Furthermore, each of the inserts includes a sliding plate, a top fixing column, two inclined plates, two sliding blocks and two side fixing columns, the sliding plate is located in the placement groove, the two inclined plates are symmetrically arranged on the sliding plate, the two inclined plates are in sliding fit with the embedding groove, the two sliding blocks are symmetrically arranged on the two inclined plates, the two sliding plates are in sliding fit with the two inclined plates respectively, the two sliding blocks are in sliding fit with the embedding groove, the top fixing column is fixedly connected to the top of the sliding plate, a sliding chute matched with the top fixing column is arranged at the top of the impeller, the two side fixing columns are fixedly connected with the two sliding blocks respectively, the two side fixing columns are located on side walls adjacent to the two sliding blocks, and a moving groove for the side fixing columns to slide is arranged on the rotating shaft.

Furthermore, the axial hole of the rotating shaft is smaller than the axial hole of the impeller by 0.03-0.12 mm.

Furthermore, the two ends of the rotating shaft are respectively provided with an installation hole site, and the rotating shaft is provided with a thread section.

Further, the impeller adopts cast iron material to make and the skin has the tungsten carbide coating, the axis of rotation adopts stainless steel material to make, the inserts adopts copper to make or adopts stainless steel and the skin has the tungsten carbide coating.

The embodiment of the utility model adopts at least one technical scheme which can achieve the following beneficial effects:

firstly, the impeller is subjected to high temperature to generate thermal expansion, at the moment, the impeller expands to drive the sliding plate to move in the placing groove, the sliding plate moves to drive the top fixing column to move into the sliding groove, the sliding plate moves to drive the two inclined plates to move in the embedding groove towards the rotating shaft, the two inclined plates move in the embedding groove, so that the two sliding blocks are driven to move oppositely in the embedding groove, the two sliding blocks move to drive the two side fixing columns to move in the two moving grooves, the impeller and the rotating shaft are connected together through the thermal expansion, and the impeller and the rotating shaft are embedded together through natural cooling, so that the requirement of integrated high-precision machining and forming is met.

Secondly, the inner diameter of the shaft center hole of the impeller is smaller than the outer diameter of the rotating shaft, so that the rotating shaft is tightly shrunk by heat expansion of the impeller, and the rotating holding degree of the impeller and the shaft reaches an integrated metallurgical grade.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

FIG. 1 is a schematic perspective view of the present invention;

FIG. 2 is a first cross-sectional view of the present invention;

FIG. 3 is a second cross-sectional view of the present invention;

FIG. 4 is a schematic view of a rotating shaft according to the present invention;

FIG. 5 is a schematic view of an impeller of the present invention;

FIG. 6 is a schematic view of an impeller and a rotating shaft of the present invention;

FIG. 7 is a schematic view of an insert of the present invention;

reference numerals:

impeller 1, axis of rotation 2, inserts 3, sliding plate 31, top fixed column 32, swash plate 33, sliding block 34, side fixed column 35, inlay groove 4, spout 5, shifting chute 6, standing groove 7.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the utility model, and not restrictive of the full scope of the utility model. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 7, an embodiment of the present invention provides an impeller with an axis inlaid after thermal expansion, including an impeller 1, a rotating shaft 2, and three inserts 3, where the impeller 1 is disposed on the rotating shaft 2, the impeller 1 is provided with three placing grooves 7, the three inserts 3 are equidistantly disposed in the placing grooves 7 of the impeller 1, the rotating shaft 2 is provided with three inserting grooves 4, in a heated state, the three inserts 3 extend into the three inserting grooves 4, and the three inserts 3 are respectively in sliding fit with the three inserting grooves 4; each of said inserts 3 comprises a sliding plate 31, a top fixing post 32, two sloping plates 33, two sliding blocks 34 and two side fixing posts 35, the sliding plates 31 are positioned in the placing groove 7, the two inclined plates 33 are symmetrically arranged on the sliding plates 31, the two inclined plates 33 are both in sliding fit with the embedding groove 4, the two sliding blocks 34 are symmetrically arranged on the two inclined plates 33, the two sliding plates 31 are respectively in sliding fit with the two inclined plates 33, the two sliding blocks 34 are in sliding fit with the embedding groove 4, the top fixing columns 32 are fixedly connected to the top of the sliding plate 31, the top of the impeller 1 is provided with a sliding chute 5 matched with the top fixing columns 32, the two side fixing columns 35 are respectively and fixedly connected with the two sliding blocks 34, the two side fixing columns 35 are located on the side walls adjacent to the two sliding blocks 34, and the rotating shaft 2 is provided with a moving groove 6 for the side fixing columns 35 to slide. After the completion of the sheathing of axis of rotation 2 and impeller 1, move to in the heating furnace between 380 degrees to 400 degrees, because impeller 1 receives high temperature and produces the thermal energy, impeller 1 inflation this moment drives sliding plate 31 and removes at standing groove 7, sliding plate 31 removes and drives top fixed column 32 and remove to spout 5 in, sliding plate 31 removes and drives two swash plates 33 and remove to axis of rotation 2 in inlaying groove 4, remove two swash plates 33 to inlaying the groove 4 in, thereby drive two sliding blocks 34 and remove in opposite directions in inlaying groove 4, two sliding blocks 34 remove and drive two side fixed columns 35 and remove to two shifting chutes 6 in, make impeller 1 and axis of rotation 2 link together through the thermal energy, make impeller 1 and axis of rotation 2 inlay together through natural cooling, reached integrative high accuracy machine-shaping's requirement.

Specifically, the axial hole of the rotating shaft 2 is smaller than the axial hole of the impeller 1 by 0.03mm to 0.12 mm. Because the inner diameter of the shaft center hole of the impeller 1 is smaller than the outer diameter of the rotating shaft 2, the rotating shaft 2 is tightly shrunk by cold after the impeller 1 is thermally expanded, and the holding degree of the impeller 1 and the shaft rotating reaches an integrated metallurgical grade.

Specifically, the two ends of the rotating shaft 2 are respectively provided with a mounting hole site, and the rotating shaft 2 is provided with a threaded section. The mounting hole positions and the threaded sections are used for mounting the rotating shaft 2 and driving the rotating shaft 2.

Specifically, impeller 1 adopts the cast iron material to make and the skin has the tungsten carbide coating, can play anticorrosive, wear-resisting effect, protects or protects the impeller, axis of rotation 2 adopts stainless steel material to make, inserts 3 adopt copper to make or adopt stainless steel and the skin has the tungsten carbide coating. The materials of the three parts can be changed and combined according to different use conditions and environments.

The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. The utility model provides an impeller is inlayed in axle center behind thermal energy, its characterized in that includes impeller (1), axis of rotation (2) and three inlay piece (3), impeller (1) sets up on axis of rotation (2), be equipped with three standing groove (7) on impeller (1), it is three in standing groove (7) of impeller (1) are equidistant to set up in inlay piece (3), be equipped with three inlay groove (4) on axis of rotation (2), under the state of heating, it is three in inlay piece (3) extend to three inlay groove (4), it is three inlay piece (3) respectively with three inlay groove (4) sliding fit.

2. The post-thermal expansion axial mosaic impeller of claim 1, wherein: each insert (3) comprises a sliding plate (31), a top fixing column (32), two inclined plates (33), two sliding blocks (34) and two side fixing columns (35), the sliding plate (31) is positioned in the placing groove (7), the two inclined plates (33) are symmetrically arranged on the sliding plate (31), the two inclined plates (33) are in sliding fit with the insert groove (4), the two sliding blocks (34) are symmetrically arranged on the two inclined plates (33), the two sliding plates (31) are respectively in sliding fit with the two inclined plates (33), the two sliding blocks (34) are in sliding fit with the insert groove (4), the top fixing column (32) is fixedly connected to the top of the sliding plate (31), the top of the impeller (1) is provided with a sliding groove (5) matched with the top fixing column (32), and the two side fixing columns (35) are respectively and fixedly connected with the two sliding blocks (34), two side fixed column (35) are located on the adjacent lateral wall of two sliding blocks (34), be equipped with on axis of rotation (2) and supply gliding shifting chute (6) of side fixed column (35).

3. The post-thermal expansion axial mosaic impeller of claim 1, wherein: the axial center hole of the rotating shaft (2) is smaller than the axial center hole of the impeller (1) by 0.03-0.12 mm.

4. The post-thermal expansion axial mosaic impeller of claim 1, wherein: the two ends of the rotating shaft (2) are respectively provided with a mounting hole site, and the rotating shaft (2) is provided with a thread section.

5. The post-thermal expansion axial mosaic impeller of claim 1, wherein: impeller (1) adopt the cast iron material to make and the outer tungsten carbide coating that has, axis of rotation (2) adopt stainless steel material to make, insert (3) adopt copper to make or adopt stainless steel and the outer tungsten carbide coating that has.