CN216464380U

CN216464380U - Preassembling tool

Info

Publication number: CN216464380U
Application number: CN202122281884.0U
Authority: CN
Inventors: 于德庆; 赵波; 蔡明�; 李洪岩; 王君禹
Original assignee: AECC Harbin Dongan Engine Co Ltd
Current assignee: AECC Harbin Dongan Engine Co Ltd
Priority date: 2021-09-18
Filing date: 2021-09-18
Publication date: 2022-05-10
Anticipated expiration: 2031-09-18

Abstract

The utility model discloses a preassembly tool which comprises a mandrel and a support; the support is of a hollow rotary body structure, an inner hole is formed in the support along the axial direction, the inner hole is divided into three sections from top to bottom, the first section is in clearance fit with the outer diameter of the rotor, the second section is matched with the mandrel, and the third section is a vent hole; the side wall of the mandrel is radially provided with a key slot penetrating through the mandrel and used for installing the blade. The pre-assembly tool provided by the utility model simulates the assembly of the blades and the rotor in the pump shell, and the blades and the rotor are assembled in the pump after being tested without being clamped, so that the repeated disassembly condition is avoided, the blade scrapping caused by repeated disassembly is prevented, and the assembly efficiency is improved.

Description

Preassembling tool

Technical Field

The utility model relates to the field of assembly of aviation pump products, in particular to a pre-assembly tool.

Background

The aviation pump product needs to rotate after assembling the blades and the rotor, so that a gap is ensured between the blades and the rotor, clamping stagnation is avoided, if clamping stagnation exists, the blades and the rotor need to be integrally disassembled and removed and then re-selected, a plurality of pairs of blades and rotors are assembled by the pump, and one clamping stagnation can lead to the disassembly of other parts together. The whole stereoplasm anodization that carries out of blade is handled, and stereoplasm treatment back blade surface is more fragile, relapses the dismouting and can lead to blade surface to jump the stubble, and then leads to the blade to scrap, and relapse the dismouting and influence efficiency.

Disclosure of Invention

The utility model aims to provide a preassembly tool to solve the problem that blades are scrapped due to repeated disassembly and assembly.

In order to realize the task, the utility model adopts the following technical scheme:

a preassembly tool comprises a mandrel and a support;

the support is of a hollow revolving body structure, an inner hole is formed in the support along the axial direction, the inner hole is divided into three sections from top to bottom, the first section is in clearance fit with the outer diameter of the rotor, the second section is matched with the mandrel, and the third section is a vent hole; the side wall of the mandrel is radially provided with a key groove penetrating through the mandrel and used for installing the blade.

Further, the preassembly tool further comprises an orientation pin;

the directional pin is a square pin and is used for matching with a pin hole formed in the support to install the rotor of the pump in the support.

Further, the inner diameters of the first section, the second section and the third section of the inner hole are gradually increased.

Further, the bottom end fillet of the first section of the inner hole of the support is not more than R0.1.

Further, the support is of a boss-shaped structure, and the first section of the inner hole is located in the protrusion of the boss.

Furthermore, the pin hole is formed in the end face of the first section of the inner hole.

Further, a shaft shoulder is arranged between the second section and the third section of the inner hole of the support for assembling the mandrel.

Further, a pair of key slots is vertically arranged on the mandrel, and the key slots penetrate through the axis of the mandrel.

Further, the distance from the pin hole in the support to the axis of the support is the same as the distance from the positioning pin hole in the rotor to the axis of the support.

Compared with the prior art, the utility model has the following technical characteristics:

the pre-assembly tool provided by the utility model simulates the assembly of the blades and the rotor in the pump shell, and the blades and the rotor are assembled in the pump after being tested without being clamped, so that the repeated disassembly condition is avoided, the blade scrapping caused by repeated disassembly is prevented, and the assembly efficiency is improved.

Drawings

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

fig. 2 is a schematic top view of the pedestal portion.

The reference numbers in the figures illustrate: 1 mandrel, 2 supports, 3 inner holes, 4 first section, 5 second section, 6 third section, 7 pin holes and 8 orientation pins.

Detailed Description

Referring to the drawings, the utility model provides a pre-assembly tool which simulates the assembly of a blade and a rotor in a pump shell, and the blade and the rotor are assembled in a pump after being tested and not clamped, so that the repeated disassembly condition is avoided.

As shown in the figure, the preassembly tool comprises a mandrel 1, a support 2 and an orientation pin 8;

the support 2 is of a hollow revolving body structure, an inner hole 3 is formed in the support 2 along the axial direction, the inner hole 3 is divided into three sections from top to bottom, a first section 4 is in clearance fit with the outer diameter of the rotor, a second section 5 is in fit with the mandrel 1, and a third section 6 is a vent hole; a key groove penetrating through the mandrel 1 is formed in the side wall of the mandrel 1 along the radial direction and used for mounting a blade; the orientation pin 8 is a square pin and is used for matching with a pin hole 7 arranged in the support 2 to install the rotor of the pump in the support 2.

Wherein, the inner diameters of the first section 4, the second section 5 and the third section 6 of the inner hole 3 are gradually increased.

The bottom end fillet of the first section 4 of the inner hole 3 of the support 2 is not more than R0.1, so that assembly interference is prevented; the support 2 is of a boss-shaped structure, and the first section 4 of the inner hole 3 is positioned in the bulge of the boss.

And the third section 6 of the inner hole 3 of the support 2 is used for integrally penetrating the support 2 and preventing the influence of the internal air on assembly during assembly.

The pin hole 7 is arranged on the end surface of the first section 4 of the inner hole 3.

And a shaft shoulder is arranged between the second section 5 and the third section 6 of the inner hole 3 of the support 2 and is used for assembling the mandrel 1.

In the scheme, a pair of key grooves is vertically arranged on the mandrel 1, and the key grooves penetrate through the axis of the mandrel 1.

The upper end of the mandrel 1 is provided with a reticulate pattern, so that the friction force is improved. The mandrel 1 is provided with a cross-hatched portion having an outer diameter smaller than the outer diameter of the remaining portion.

The distance from the pin hole 7 on the support 2 to the axis of the support 2 is the same as the distance from the positioning pin hole on the rotor to the axis of the support 2.

The using process of the utility model is as follows:

the rotor is fixed in the support 2 by the positioning pin 8 penetrating through the positioning pin hole on the rotor, then the blade penetrates through the key slot on the mandrel 1, the mandrel 1 with the blade is placed into the support 2, the lower end of the mandrel 1 is assembled to the second section 5 of the inner hole 3, then the mandrel 1 is rotated to drive the blade to rotate together, whether the blade is interfered with the rotor or not is observed, if so, the blade is replaced, and the blade can be assembled into formal parts without interference.

The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equally replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application, and are intended to be included within the scope of the present application.

Claims

1. The preassembly tool is characterized by comprising a mandrel (1) and a support (2);

the support (2) is of a hollow revolving body structure, an inner hole (3) is formed in the support (2) along the axial direction, the inner hole (3) is divided into three sections from top to bottom, a first section (4) is in clearance fit with the outer diameter of a rotor, a second section (5) is in fit with the mandrel (1), and a third section (6) is a vent hole; the side wall of the mandrel (1) is radially provided with a key groove which penetrates through the mandrel (1) and is used for installing the blade.

2. The preassembly tool according to claim 1, characterized in that it further comprises an orientation pin (8);

the orientation pin (8) is a square pin and is used for matching with a pin hole (7) formed in the support (2) to install the rotor of the pump in the support (2).

3. The preassembly tool according to claim 1, characterized in that the first, second and third sections (4, 5, 6) of the bore (3) have a gradually increasing inner diameter.

4. The preassembly tool according to claim 1, characterized in that the bottom end fillet of the first section (4) of the inner bore (3) of the support (2) is not greater than R0.1.

5. A preassembly tool according to claim 1, characterized in that the seat (2) is of boss-like configuration, the first section (4) of the bore (3) being located in the projection of the boss.

6. The preassembly tool according to claim 2, characterized in that the pin hole (7) opens out on the end face of the first section (4) of the inner bore (3).

7. The preassembly tool according to claim 1, characterized in that a shoulder is provided between the second (5) and third (6) sections of the inner bore (3) of the support (2) for assembling the spindle (1).

8. The preassembly tool according to claim 1, characterized in that a pair of keyways is vertically arranged on the spindle (1), the keyways passing through the axis of the spindle (1).

9. The preassembly tool according to claim 1, characterized in that the distance from the pin hole (7) on the support (2) to the axis of the support (2) is the same as the distance from the locating pin hole on the rotor to the axis of the support (2).