CN209869486U

CN209869486U - Spiral impeller

Info

Publication number: CN209869486U
Application number: CN201821319871.XU
Authority: CN
Inventors: 肖惠明; 梁昕; 李必华; 梁跃勇
Original assignee: Changde Jinggong Machinery Manufacturing Co Ltd
Current assignee: Changde Jinggong Machinery Manufacturing Co Ltd
Priority date: 2018-08-16
Filing date: 2018-08-16
Publication date: 2019-12-31
Anticipated expiration: 2028-08-16

Abstract

The utility model provides a spiral impeller, which comprises a hub, an axial hole on the hub and a spiral surface on the outer cylinder of the hub, wherein both ends of the axial hole are hexagonal holes, and the middle part of the axial hole is a cylindrical hole; the novel energy-saving device adopts a scientific and reasonable structure, achieves the purposes of light weight, convenient assembly and disassembly, simple maintenance, high output efficiency, relatively low energy consumption and long service life, and can safely operate for a long time in the working environments of collision, impact and strong extrusion forming; the device is widely suitable for being matched with a forming device of extrusion equipment, and is also suitable for being matched with wear-resistant parts of various engineering machinery shield machines, excavators, shale brick machines and the like.

Description

Spiral impeller

Technical Field

The utility model relates to a helical blade wheel in extrusion equipment forming device.

Background

The common extrusion equipment is provided with a forming device, a transmission shaft is arranged in the inner cavity of the forming device, a spiral impeller is arranged on the transmission shaft, the extrusion equipment is started, the prepared main material and auxiliary material are fed into the forming device through a hopper, and the spiral impeller rotates to forcibly extrude the main material and the auxiliary material in the forming device into products with the shape and the size required by users.

The screw impeller structure generally used by the existing extrusion equipment is shown in fig. 4 and 5, the center of the hub of the screw impeller is provided with a hexagonal through hole which is an assembly hole and is directly cast without machining, and the outer cylinder of the hub is provided with a smooth helical surface; this kind of helical impeller generally adopts the bulk casting, because there is certain requirement to the size precision and the form and position precision of pilot hole during the installation, so ordinary casting hardly satisfies the required precision, to the hexagonal journal assembly difficulty that makes helical impeller and transmission shaft, even unable assembly, it is also inconvenient to maintain, if increase hexagonal hole size blindly, it is eccentric to produce the installation of helical impeller easily, will destroy forming device inner chamber lining wall, consequently current helical impeller has the structure unreasonable to the utmost, weight is bigger partially, defects such as installation maintenance is inconvenient.

Disclosure of Invention

In view of the above situation, an object of the present invention is to provide a helical impeller, which is reasonable in structure, light in weight, convenient to assemble and disassemble, simple to maintain, capable of safely operating for a long time in the working environment of collision, impact and strong extrusion molding, high in output efficiency, relatively low in energy consumption, long in service life, convenient to install and maintain, and easy to popularize.

In order to realize the task, the spiral impeller comprises a hub, an axis hole in the hub and a spiral surface on the outer cylinder of the hub, wherein the two ends of the axis hole are hexagonal holes, and the middle of the axis hole is a cylindrical hole.

For realizing the utility model discloses structure, effect optimization, its further measure: the inner diameter of the cylindrical hole is larger than the diagonal distance B of the hexagonal hole.

The two sides of the root part of the spiral surface are provided with a plurality of counter bores, and the ratio of the depth T of each counter bore to the thickness S of the spiral surface is 0.13-0.16.

The ratio of the axial length dimension H of the hexagonal hole to the opposite side distance dimension A of the hexagonal hole is 0.7-0.8.

The utility model discloses compare the produced beneficial effect of prior art:

the two ends of a hub axis hole of the helical impeller are arranged to be hexagonal holes, the middle of the hub axis hole is a cylindrical hole, the inner diameter of the cylindrical hole is larger than the diagonal distance B of the hexagonal hole, and the ratio of the axial length dimension H to the opposite side distance dimension A in the hexagonal hole is 0.7-0.8; the structure greatly reduces the contact area of the hexagonal hole of the helical impeller and the hexagonal shaft neck on the transmission shaft, and can better meet the dimensional accuracy and the form and position accuracy of the hexagonal holes at two ends during casting, thereby reducing the assembly difficulty, improving the assembly accuracy, ensuring smooth assembly and convenient installation and maintenance;

(II) the utility model discloses helicoid root two sides on the face of cylinder outside the wheel hub of helical blade wheel set up a plurality of counter bores, and the ratio of the degree of depth T of counter bore and the thickness S of helicoid is 0.13 ~ 0.16, and helical blade wheel 'S stress intensity and life can be guaranteed to this structure, can make helical blade wheel' S weight again alleviate 12 ~ 15%, have effectively reduced the material expense, have reduced the cost of manufacture.

The utility model discloses extensively be applicable to the supporting use of forming device of extrusion equipment, also be suitable for the supporting use of various engineering machine tool stand wear and tear spare such as shield structure machine, excavator, shale brick machine.

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

Fig. 1 is a front view of the overall structure of the present invention.

Fig. 2 is a top view of the overall structure of the present invention.

Fig. 3 is a cross-sectional view of the middle spiral surface of the present invention.

Fig. 4 is a front view of a conventional helical impeller.

Fig. 5 is a plan view of a conventional helical impeller.

In the figure: 1-hub, 2-axis hole, 21-hexagonal hole, 22-cylindrical hole, 3-helical surface, 31-counter bore, opposite side distance of A-hexagonal hole, opposite side distance of B-hexagonal hole, axial length of H-hexagonal hole, thickness of S-helical surface and depth of T-counter bore.

Detailed Description

Referring to fig. 1 to 3, the helical impeller of the present invention is structured such that the axis of the hub 1 is used as a reference, the two ends of the axis hole 2 are disposed as hexagonal holes 21, and the middle thereof is disposed with a cylindrical hole 22; the geometry of hexagonal hole 21 includes: the distance between opposite sides is A, the distance between opposite sides is B, and the axial length is H; the diameter of the cylindrical hole 22 must be larger than the diagonal distance B of the hexagonal hole, the ratio of the axial length dimension H to the opposite side distance dimension A in the hexagonal hole 21 is 0.7-0.8, the adoption of the structure is convenient for integral casting forming, the processing and installation difficulty is reduced, and the requirement of the stress strength of the helical impeller can be met; the two sides of the root part of the spiral surface 3 on the outer cylindrical surface of the hub 1 are provided with a plurality of counter bores 31, the distance between the adjacent counter bores 31 is generally 40-50 mm, the distance between the counter bores 31 and the outer edge of the spiral surface 3 is generally 30-35 mm, and the ratio of the depth T of the counter bores 31 to the thickness S of the spiral surface 3 is 0.13-0.16; the structure of the helical impeller can reduce the weight by 12-15%, and the structure greatly reduces the contact area of the hexagonal hole 21 of the helical impeller and the hexagonal shaft neck of the transmission shaft, and can better meet the dimensional accuracy and the form and position accuracy of the hexagonal holes 21 at two ends during casting, so that the assembly difficulty can be reduced, the assembly accuracy can be improved, the assembly is smooth, and the qualification rate is more than or equal to 99.5%.

The utility model relates to a with supporting helical blade wheel who uses of extrusion equipment, its theory of operation is: the inner cavity of the forming device of the extrusion equipment is provided with a transmission shaft, the hexagonal shaft neck of the transmission shaft is provided with an extrusion spiral impeller, the extrusion equipment is started to drive the transmission shaft, and the spiral impeller forcefully extrudes the prepared powder into a product with the shape and the size required by a user.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art; any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A spiral impeller is characterized by comprising a hub (1), an axial hole (2) in the hub (1) and a spiral surface (3) on the outer cylinder of the hub (1), wherein hexagonal holes (21) are formed in two ends of the axial hole (2), and a cylindrical hole (22) is formed in the middle of the axial hole; the inner diameter of the cylindrical hole (22) is larger than the diagonal distance B of the hexagonal hole (21), a plurality of counter bores (31) are formed in the two sides of the root of the spiral surface (3), and the ratio of the depth T of each counter bore (31) to the thickness S of the spiral surface (3) is 0.13-0.16; the ratio of the axial length dimension H of the hexagonal hole (21) to the opposite side distance dimension A of the hexagonal hole (21) is 0.7-0.8.