CN111173812A

CN111173812A - Pre-tightening nut dismounting device after reduction of oil pressure of propeller

Info

Publication number: CN111173812A
Application number: CN201811327912.4A
Authority: CN
Inventors: 王慧玲; 马新伟; 蔡猛; 谭林月; 韩东华; 王龙
Original assignee: AVIC Huiyang Aviation Propeller Co Ltd
Current assignee: AVIC Huiyang Aviation Propeller Co Ltd
Priority date: 2018-11-09
Filing date: 2018-11-09
Publication date: 2020-05-19
Anticipated expiration: 2038-11-09
Also published as: CN111173812B

Abstract

The invention belongs to the technical field of disassembling tools, and relates to a device for disassembling a pre-tightening nut after the oil pressure of a propeller is reduced. Comprises a force application part and a force bearing part; the force application part is fixedly connected with two symmetrical ends of two clamping hoops (6) through fasteners, two protection rings (9) are symmetrically arranged on the inner ring of the clamping hoops (6) and are connected through countersunk screws (8), the loose piece (5) is fixedly connected with the clamping hoops (6) through bolts (4), and the bolts (3) are in threaded connection with the loose piece (5); the stressed part is fixedly connected by an upper clamp (11) and a lower clamp (12) through pins. The stress handles are respectively arranged at the center positions of the outer rings of the upper clamp (11) and the lower clamp (12), and uniformly distributed bosses are arranged on the inner rings of the upper clamp (11) and the lower clamp (12). The device can be used in a smaller space, realizes the transmission of larger torque, is simple to operate, is convenient and quick to disassemble the pre-tightening nut, and can meet the requirements of external field disassembly.

Description

Pre-tightening nut dismounting device after reduction of oil pressure of propeller

Technical Field

The invention belongs to the technical field of disassembling tools, and relates to a device for disassembling a pre-tightening nut after the oil pressure of a propeller is reduced.

Background

After the outfield propeller is pressurized with oil, the rubber ring may explode, and a new rubber ring needs to be replaced. The damage of rubber ring leads to the inside oil pressure of screw to reduce, and the frictional force increase between abrasionproof pad and the pretension nut, current pretension nut spanner moment value is less, unsatisfied dismantlement requirement, can't effectively dismantle the pretension nut.

Disclosure of Invention

The purpose of the invention is as follows: the problem of the outfield screw rubber ring explode the back pretension nut and dismantle the difficulty is solved, provide a supply outfield to use screw pretension nut dismounting device, the device can use in less space, realizes the transmission of great moment, easy operation dismantles pretension nut convenient and fast, can satisfy the demand that the outfield dismantled.

The technical scheme of the invention is as follows: a pre-tightening nut dismounting device after the oil pressure of a propeller is reduced is characterized by comprising a force application part and a force bearing part; the force application part is fixedly connected with two symmetrical ends of two clamping hoops 6 through fasteners, two protection rings 9 are symmetrically arranged on the inner ring of the clamping hoops 6 and are connected through countersunk screws 8, the loose piece 5 is fixedly connected with the clamping hoops 6 through bolts 4, and the bolts 3 are in threaded connection with the loose piece 5; the stressed part is fixedly connected by an upper clamp 11 and a lower clamp 12 through pins. The central positions of the outer rings of the upper clamp 11 and the lower clamp 12 are respectively provided with a stress handle, and the inner rings of the upper clamp 11 and the lower clamp 12 are provided with uniformly distributed bosses

The stress handle is a stress surface of a stress part, and the stress surface is an inner arc surface.

The number of the bosses is 7.

The bottom of the loose piece 5 is an arc surface and is attached to the clamping hoop 6, the middle of the loose piece is provided with a kidney-shaped groove, the bolt 4 can move freely in the kidney-shaped groove, the bolt 4 is convenient to mount, the top of the loose piece is provided with an inclined hole, and the bolt 3 can be in contact with the stress handle of the stress part through the inclined hole.

The inner ring of the clamping hoop 6 is provided with a plurality of threaded holes, and the loose piece 5 can be arranged at any position of the clamping hoop 6.

One side of each clamping hoop 6 is provided with 2 rectangular bulges for positioning and clamping the outer ring of the tapered roller bearing.

Two ends of the 2 clampers 6 are respectively provided with a loose piece 5, and large torque transmission is realized under the condition that the space allows.

The fastener comprises a bolt 1, a gasket 2 and a nut 7, wherein the bolt 1 penetrates through holes at two ends of the gasket 2 and the 2 clamping hoops 6 and is fixed through the nut 7.

The invention has the beneficial effects that: according to the device for detaching the pre-tightening nut after the oil pressure of the propeller is reduced, the device can be used in a small space, large torque transmission is achieved, the operation is simple, the pre-tightening nut is convenient and fast to detach, and the requirement for detaching the pre-tightening nut in an outfield can be met.

Drawings

FIG. 1 is a schematic view of a force applying portion

FIG. 2 is a schematic view of the structure of a stressed part

FIG. 3 front view of a clampband configuration

FIG. 4 top view of a clampband configuration

Detailed Description

The invention is further described with reference to the following figures and specific embodiments:

as shown in fig. 1 to 4, a device for detaching a pre-tightening nut after the oil pressure of a propeller is reduced comprises a force application part and a force bearing part; the force application part is fixedly connected with two symmetrical ends of two clampers 6 through fasteners, each fastener comprises a bolt 1, a gasket 2 and a nut 7, and the bolt 1 penetrates through holes at two ends of the gaskets 2 and the clampers 6 and is fixed through the nuts 7. The inner ring of the clamping hoop 6 is provided with a plurality of threaded holes, and the loose piece 5 can be arranged at any position of the clamping hoop 6. One side of each of the 2 clampers 6 is provided with 2 rectangular bulges for positioning and clamping the outer ring of the tapered roller bearing. The two protection rings 9 are symmetrically arranged on the inner ring of the clamping hoop 6 and are connected through a countersunk screw 8, the loose piece 5 and the clamping hoop 6 are fixedly connected through a bolt 4, and the bolt 3 and the loose piece 5 are in threaded connection; the bottom of the loose piece 5 is a circular arc surface and is attached to the clamp 6, the top of the loose piece is provided with an inclined hole, and the bolt 3 can be contacted with the stress handle of the stress part through the inclined hole. Two ends of each of the 2 clampers 6 are respectively provided with a loose piece 5, and large torque transmission is realized under the condition that space allows. The stressed part is fixedly connected by an upper clamp 11 and a lower clamp 12 through pins. Go up

clamp

11 and 12 outer lane central points on the clamp and put and be equipped with the atress handle respectively, the atress handle is atress part stress surface, and the stress surface is that

clamp

11 and 12 inner circles of lower clamp are equipped with the equipartition boss on the inner arc surface, and the boss is 7.

The use method of the invention comprises the following steps:

firstly, assembling a force application part, wherein 2 blade root protection rings 9 are respectively assembled on the inner rings of 2 clamping hoops 6 through countersunk screws 8, a rectangular bulge at one side 2 of each clamping hoop 6 is positioned and clamped in a clamping groove of an outer ring of a blade root tapered roller bearing, and the blade root is clamped, and the 2 clamping hoops 6 are fastened through fasteners. And secondly, assembling a stressed part, positioning and clamping a pretightening nut by the inner rings of the upper clamp 11 and the lower clamp 12 through a boss 7, and fastening the upper clamp and the lower clamp by using a pin 13. Finally, a loose piece 5 is installed, a force application part loose piece 5 is provided with a kidney-shaped groove, each clamping hoop 6 is provided with 9 screw holes, and a screw 4 fixes the loose piece 5 with the kidney-shaped groove and any one of the screw holes of the clamping hoops 6 (a user can select a proper position to fix the loose piece 5 according to requirements). Before the screw 4 is not screwed down, the loose piece 5 can slide in the kidney-shaped groove, after all the installation is finished, the force application part pushes the stress handles of the upper clamp 11 and the lower clamp 12 of the stress part to rotate by rotating the M12 screw 3 with the length of about 100mm on the loose piece 5, so that the pre-tightening nut is slightly rotated, the loose piece 5 is adjusted to a proper position, the pre-tightening nut is rotated again, and the actions are repeated until the purpose of disassembling the predicted nut is achieved.

Claims

1. A pre-tightening nut dismounting device after the oil pressure of a propeller is reduced is characterized by comprising a force application part and a force bearing part; the force application part is fixedly connected with two symmetrical ends of two clamping hoops (6) through fasteners, two protection rings (9) are symmetrically arranged on the inner ring of the clamping hoops (6) and are connected through countersunk screws (8), the loose piece (5) is fixedly connected with the clamping hoops (6) through bolts (4), and the bolts (3) are in threaded connection with the loose piece (5); the stressed part is fixedly connected by an upper clamp (11) and a lower clamp (12) through pins. The stress handles are respectively arranged at the center positions of the outer rings of the upper clamp (11) and the lower clamp (12), and uniformly distributed bosses are arranged on the inner rings of the upper clamp (11) and the lower clamp (12).

2. The device for detaching the pre-tightening nut after the oil pressure of the propeller is reduced as claimed in claim 1, wherein the stress handle is a stress surface of a stress part, and the stress surface is an inner arc surface.

3. The device for detaching the pre-tightening nut after the oil pressure of the propeller is reduced as claimed in claim 1, wherein the number of the bosses is 7.

4. The propeller pre-tightening nut dismounting device after oil pressure is reduced as claimed in claim 1, characterized in that the bottom of the loose piece (5) is a circular arc surface, the loose piece is attached to the clamp (6), a waist-shaped groove is formed in the middle of the loose piece, the bolt (4) can freely move in the waist-shaped groove, the bolt (4) is convenient to mount, an inclined hole is formed in the top of the loose piece, and the bolt (3) can be in contact with a stressed handle of a stressed part through the inclined hole.

5. The propeller pre-tightening nut dismounting device after oil pressure is reduced as set forth in claim 1, characterized in that a plurality of threaded holes are formed in the inner ring of the clamping hoop (6), the loose piece (5) can be installed at any position of the clamping hoop (6), and 2 rectangular protrusions are arranged on one side of 2 clamping hoops (6) and used for positioning and clamping the outer ring of the tapered roller bearing.

6. The propeller pre-tightening nut dismounting device after oil pressure is reduced as set forth in claim 1, characterized in that the two ends of the 2 clamping hoops (6) are respectively provided with a loose block (5), and large torque transmission is realized under the condition of space allowance.

7. The device for detaching the pre-tightening nut after the oil pressure of the propeller is reduced as claimed in claim 1, wherein the fastener comprises a bolt (1), a gasket (2) and a nut (7), and the bolt (1) penetrates through holes at two ends of the gasket (2) and the 2 clamping hoops (6) and is fixed through the nut (7).