CN213259249U

CN213259249U - Tool for disassembling interference assembly slender shaft

Info

Publication number: CN213259249U
Application number: CN202022003372.3U
Authority: CN
Inventors: 蔡文君
Original assignee: Jiuquan Xinda Industrial Co ltd
Current assignee: Jiuquan Xinda Industrial Co ltd
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-05-25
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses an interference fit slender axles demolish frock, this frock is by two in the completely symmetrical three of relative direction grabs and draws the seat to constitute, three grab draw the seat to include drum, U type groove A, U type groove B, U type groove C, U type groove A, U type groove B, U type groove C one end all with drum surface fixed connection, the other end is respectively set up through-hole A, through-hole B, through-hole C at the groove bottom, wherein U type groove A, U type groove B is in on the same straight line, U type groove C is perpendicular relative to U type groove A, U type groove B; the utility model discloses the triangular structure of symmetry has ensured that the slender axles of interference fit are dismantling in-process stability, and it is more convenient to make the dismantlement process, has realized the aerial dismantlement of slender axles of interference fit, and the setting of the drum of drawing the seat is grabbed to three simultaneously, and hydraulic jack and epaxial between are arranged in to optional suitable cushion for adjust the jack stroke, make jack stroke effectively utilize.

Description

Tool for disassembling interference assembly slender shaft

Technical Field

The utility model belongs to wind turbine generator system maintains the maintenance equipment field, concretely relates to frock is demolishd to interference fit slender axles.

Background

The gear box of the Huarui 3WM fan unit is connected with the moment arm through an interference assembly slender shaft, the diameter size of the shaft is 120.03mm, the size of the inner hole of the bearing is 119.97mm, the original assembly adopts a cold assembly process, namely, the shaft is cooled to 190 ℃ below zero in liquid nitrogen, the diameter of the shaft is shrunk by 0.1 to 0.2, then the shaft is quickly assembled, the shaft expands to form interference fit with the bearing after the normal temperature, the shaft expands to the original size at the normal temperature, the inner hole of the bearing is smaller than the shaft, so a large matching force is generated, the interference assembly between the shaft and the bearing ensures the stability of the gear box and the moment arm of the fan unit to a great extent, however, the slender shaft assembled in an interference fit mode is difficult to maintain, the maintenance cost is very high when the gearbox and the moment arm of the whole unit are disassembled, and therefore a tool capable of conveniently disassembling the gearbox and the moment arm in the interference fit mode in the air is needed urgently.

SUMMERY OF THE UTILITY MODEL

To above technical problem, the utility model discloses the technical effect that will reach is that a dismantle convenient, use manpower sparingly, but the frock is demolishd to simple and easy type interference fit slender axles that can reduce cost of maintenance simultaneously.

In order to solve the technical problem, the utility model provides an interference fit slender axles demolish frock, this frock is grabbed by two complete symmetries that are in relative direction and is drawn the seat to constitute, three grab draw the seat to include drum, U type groove A, U type groove B, U type groove C, U type groove A, U type groove B, U type groove C one end all with drum surface fixed connection, the other end is opened respectively at the bottom of the groove and is equipped with through-hole A, through-hole B, through-hole C, wherein U type groove A, U type groove B is in on the same straight line, U type groove C is perpendicular for U type groove A, U type groove B; the through hole A, the through hole B and the through hole C are correspondingly connected through a screw rod respectively, and two ends of the screw rod are fastened at the outer side of the groove bottom through nuts.

Further, the length of the cylinder is consistent with the depth of the U-shaped groove A, U, the groove B, U and the groove C.

Further, hangers are symmetrically arranged on the U-shaped groove A, U and the groove B relative to the axis of the cylinder.

Further, the inner diameter of the cylinder is not less than 150 mm.

Further, the lead screw is an M45 high-strength lead screw.

Compared with the prior art, the utility model has the following advantage:

1. the utility model discloses mainly three of the symmetry of connecting by the lead screw are grabbed and are drawn the seat and constitute, and three are grabbed and are drawn seat, axle and arrange same axis position in, and the triangle structure of symmetry has ensured that the slender axles of interference fit is dismantling in-process stability, and it is more convenient to make the dismantlement process, has realized the aerial dismantlement of slender axles of interference fit.

2. The utility model discloses facilitate the use, can choose to use suitable cushion to arrange in between hydraulic jack and the axle for adjust the jack stroke, make jack stroke effective utilization.

3. The utility model discloses in, the setting of hangers has ensured that three are grabbed and have drawn the safety in utilization of seat in installation and dismantlement process.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of the symmetrical three-grab pull seat of the present invention.

In the figure: 1. three grab and draw seat, 2, U type groove A, 3, U type groove B, 4, U type groove C, 5, drum, 6, lead screw, 7, nut, 8, hangers, 9, through-hole A, 10, through-hole C, 11, through-hole B.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

As shown in fig. 1 and 2, the tool for disassembling the interference assembly slender shaft is composed of two completely symmetrical three-grab pulling seats 1 in opposite directions, each three-grab pulling seat 1 comprises a cylinder 5, a U-shaped groove a2, a U-shaped groove B3 and a U-shaped groove C4, one end of each of the U-shaped grooves a2, B3 and C4 is fixedly connected with the outer surface of the cylinder 5, and the other end of each of the three-grab pulling seats is provided with a through hole a9, B11 and C10 at the bottom of the groove respectively, wherein the U-shaped groove a2 and the U-shaped groove B3 are on the same straight line, and the U-shaped groove C4 is vertical to the U-shaped grooves a2 and B3; the through hole A9, the through hole B11 and the through hole C10 are correspondingly connected through the screw rod 6 respectively, and two ends of the screw rod 6 are fastened at the outer side of the bottom of the groove through nuts 7; the length of the cylinder 5 is consistent with the depth of the U-shaped groove A2, the U-shaped groove B3 and the U-shaped groove C4; the U-shaped groove A2 and the U-shaped groove B3 are symmetrically provided with hanging lugs 8 relative to the axis of the cylinder 5; the inner diameter of the cylinder 5 is not less than 150 mm; the screw rod 6 is an M45 high-strength screw rod.

The utility model discloses a working process does: before the tool is disassembled by assembling the slender shaft in an interference manner, ensuring that a tool screw rod 6 and a three-grab pull seat 1 are intact and can be normally used, firstly separating two symmetrical three-grab pull seats 1 from the screw rod 6, connecting a cabin chain with a hanging lug 8 on the three-grab pull seat 1, ensuring that the three-grab pull seat 1 can be effectively lifted, respectively arranging the lifted three-grab pull seats 1 at two ends of a shaft, aligning two ends of the shaft with a cylinder 5 on the three-grab pull seat 1, then connecting the two symmetrical three-grab pull seats 1 through the screw rod 6, ensuring that the positions of two ends of the shaft and the cylinder 5 are unchanged in the connection process of the screw rod 6, arranging the three-grab pull seats 1 and the shaft on the same axis, fastening nuts 7 outside a U-shaped groove after connection, tightly buckling the three-grab pull seats 1 at two ends of the shaft, simultaneously ensuring that each screw rod 6 is uniformly stressed and accurately positioned in length, arranging a 200T hydraulic jack connected with an external hydraulic station at one end of the shaft, selecting a plurality of phi 110 cushion blocks to be arranged between a hydraulic jack and a shaft for adjusting the stroke of the 200T hydraulic jack to effectively utilize the stroke of the 200T hydraulic jack, arranging the three-grab pull seat 1, the 200T hydraulic jack and the shaft on the same axial position, starting pressurization, continuously replacing cushion blocks with proper thickness when the shaft is ejected smoothly until the shaft is ejected completely, and knocking the other end of the shaft by a hammer under the pressure state of the 200T hydraulic jack while knocking by the hydraulic jack if the shaft is not moved when the shaft is ejected out, so that the shaft is ejected completely by a resonance method; the symmetrical triangular structure ensures the stability of the interference assembly slender shaft in the disassembly process, makes the disassembly process more convenient, realizes the aerial disassembly of the interference assembly slender shaft, and simultaneously, due to the arrangement of the cylinder 5 of the three-grab pull seat 1, a proper cushion block can be selected to be arranged between the hydraulic jack and the shaft for adjusting the stroke of the jack and effectively utilizing the stroke of the jack.

Claims

1. The utility model provides a frock is demolishd to interference fit slender axles which characterized in that: the tool comprises two completely symmetrical three-grab pulling seats (1) which are in opposite directions, wherein each three-grab pulling seat (1) comprises a cylinder (5), a U-shaped groove A (2), a U-shaped groove B (3) and a U-shaped groove C (4), one end of each U-shaped groove A (2), one end of each U-shaped groove B (3) and one end of each U-shaped groove C (4) are fixedly connected with the outer surface of the cylinder (5), the other end of each U-shaped groove A (2) is provided with a through hole A (9), a through hole B (11) and a through hole C (10) at the bottom of each groove, the U-shaped grooves A (2) and the U-shaped grooves B (3) are positioned on the same straight line, and the U-shaped grooves C (4) are; the through hole A (9), the through hole B (11) and the through hole C (10) are correspondingly connected through a screw rod (6) respectively, and the two ends of the screw rod (6) are fastened through nuts (7) on the outer side of the groove bottom.

2. The interference fit slender shaft dismantling tool as set forth in claim 1, wherein: the length of the cylinder (5) is consistent with the depth of the U-shaped groove A (2), the U-shaped groove B (3) and the U-shaped groove C (4).

3. The interference fit slender shaft dismantling tool as set forth in claim 1, wherein: the U-shaped groove A (2) and the U-shaped groove B (3) are symmetrically provided with hangers (8) relative to the axis of the cylinder (5).

4. The interference fit slender shaft dismantling tool as set forth in claim 1, wherein: the inner diameter of the cylinder (5) is not less than 150 mm.

5. The interference fit slender shaft dismantling tool as set forth in claim 1, wherein: the screw rod (6) is an M45 high-strength screw rod.