阅读说明：本技术 一种船用柴油机飞轮端上紧螺母工装件及其使用方法 (Marine diesel engine flywheel end tightening nut tooling piece and using method thereof ) 是由 薛昌奇 李金光 于 2019-09-18 设计创作，主要内容包括：本发明公开了一种船用柴油机飞轮端上紧螺母工装件及其使用方法,所述工装件包括内边缘套设在待上紧螺母上的角度盘,所述角度盘的外边缘呈圆形且设置有圆弧刻度,用来配合外部标记显示所述角度盘绕自轴转动的角度,所述角度盘上设置至少两组相对的限位板,所述限位板为直角结构,所述限位板的竖直面贴紧所述待上紧螺母,所述限位板的水平面上开设有腰形孔,所述腰形孔中穿设平头螺栓,所述平头螺栓的头部抵靠在所述角度盘的下表面。该工装件可用于船用柴油机飞轮端上紧螺母,能控制旋转角度,操作简单,方便施工,满足柴油机厂家对螺母旋转角度的技术要求,能提高造船精度,该工装件可调节,用于尺寸规格在一定范围内的紧固螺母。(The invention discloses a tooling part for tightening a nut at a flywheel end of a marine diesel engine and a using method thereof. The tooling part can be used for tightening the nut at the flywheel end of the marine diesel engine, can control the rotation angle, is simple to operate, is convenient to construct, meets the technical requirement of a diesel engine manufacturer on the rotation angle of the nut, can improve the shipbuilding precision, is adjustable, and is used for the fastening nut with the size specification within a certain range.)

1. A tooling piece for tightening a nut at the flywheel end of a marine diesel engine is characterized by comprising an angle scale (2) with an inner edge sleeved on a nut (1) to be tightened, the outer edge of the angle scale (2) is circular and is provided with an arc scale (3) which is used for matching with an external mark (4) to display the angle of the angle scale (2) rotating around the self-axis, at least two groups of opposite limiting plates are arranged on the angle scale (2), the limiting plates are of a right-angle structure, the vertical surface (5) of the limiting plate is tightly attached to the nut (1) to be tightened, the horizontal surface (6) of the limiting plate is provided with a waist-shaped hole (7), a flat head bolt (8) penetrates through the waist-shaped hole (7), the head of the flat head bolt (8) is abutted against the lower surface of the angle scale (2), the tail part of the flat head bolt (8) is connected with a fixed nut (9) and a gasket (10) to abut against the upper surface of the horizontal plane (6) of the limiting plate.

2. The marine diesel engine flywheel end tightening nut tooling as claimed in claim 1, wherein the inner edge of the angular plate (2) is a regular hexagon, and the tooling comprises two sets of opposite limiting plates.

3. The marine diesel engine flywheel end fastening nut tooling piece as claimed in claim 2, characterized in that a set of opposite limiting plates is distributed on the left side and the right side of the angle scale (2), and another set of opposite limiting plates is distributed on the upper right side and the lower left side of the angle scale (2).

4. The marine diesel engine flywheel end tightening nut tooling member as set forth in claim 3, characterized in that the arc scales (3) are distributed on the upper left and lower right of the angle scale (2), each scale represents 1 degree, and the arc scales (3) on the lower left and lower right comprise 60 scales.

5. The marine diesel engine flywheel end nut tightening tooling as set forth in claim 1, characterized in that a graduated scale (11) is provided on the angle scale (2), and a graduated pointer (12) for reading in cooperation with the graduated scale (11) is provided on the horizontal plane (6) of the position limiting plate for determining the position of the position limiting plate.

6. The flywheel end fastening nut tooling device of the marine diesel engine according to claim 1, characterized in that a countersunk hole is formed on the lower surface of the angle plate (2), and the head of the flat head bolt (8) is accommodated in the countersunk hole.

7. The use method of the tool for tightening the nut at the flywheel end of the marine diesel engine is characterized by comprising the following steps of:

selecting an adaptive tool piece according to the specification of the nut (1) to be tightened;

sleeving an angle scale (2) on the nut (1) to be tightened, and installing a limiting plate on the angle scale (2) to ensure that a vertical surface (5) of the limiting plate is tightly attached to the nut (1) to be tightened and the readings of the scale pointers (12) of all the limiting plates are the same;

an external mark (4) is made on the outer side of the angle scale (2), and a first reading of the arc scale (3) pointed by the external mark (4) is read;

rotating the nut (1) to be tightened, and reading a second reading of the arc scale (3) pointed by the external mark (4);

and calculating the difference value of the first reading and the second reading, namely the angle number rotated by the nut (1) to be tightened.

Technical Field

The invention belongs to the technical field of ship manufacturing, and particularly relates to a flywheel end fastening nut tooling piece of a marine diesel engine and a using method thereof.

Background

On a large ship, an output end, namely a flywheel end, of a marine diesel engine is usually connected with a middle shaft flange of a shafting through a fastening bolt, the fastening bolt is in interference fit with a flange bolt hole, the ship adopts a liquid nitrogen cooling process to install the fastening bolt, however, when the fastening nut is tightened, technical documents of marine diesel engine factories have related requirements on the fastening nut, usually, the fastening nut is required to be pre-tightened by a torque first and then rotated by a certain angle, for example, a certain ship is required to be pre-tightened by 250Nm. first and then rotated by 15 degrees, however, in the field actual operation process, a site worker cannot easily mark out an accurate 15-degree circle center base point. Therefore, how to design a tool for tightening the nut more reasonably becomes a problem to be solved urgently.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a tooling part for tightening a nut at the flywheel end of a marine diesel engine and a using method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a marine diesel engine flywheel end fastening nut frock piece, frock piece includes that the inward flange cover is established the angle scale on treating the fastening nut, the outward flange of angle scale is circular and is provided with the circular arc scale, is used for coordinating outside mark to show the angle is coiled from axle pivoted angle, set up two sets of relative limiting plates at least on the angle scale, the limiting plate is the right angle structure, the vertical face of limiting plate pastes tightly treat fastening nut, waist shape hole has been seted up on the horizontal plane of limiting plate, wear to establish the flat head bolt in the waist shape hole, the head of flat head bolt supports and leans on the lower surface of angle scale, the connection of the afterbody of flat head bolt fixation nut supports with the gasket and leans on the upper surface at the horizontal plane of limiting plate.

Preferably, the inner edge of the angle scale is a regular hexagon, and the tooling component comprises two sets of opposite limiting plates.

Preferably, a set of opposite limiting plates is distributed on the left side and the right side of the angle scale, and another set of opposite limiting plates is distributed on the upper right side and the lower left side of the angle scale.

Preferably, the arc scales are distributed on the upper left and the lower right of the angle scale, each grid of scales represents 1 degree, and the arc scales on the lower left and the lower right respectively comprise 60 grids.

Preferably, a graduated scale is arranged on the angle scale, and a graduated pointer matched with the graduated scale for reading is arranged on the horizontal plane of the limiting plate and used for determining the position of the limiting plate.

Preferably, a countersunk hole is formed in the lower surface of the angle scale, and the head of the flat head bolt is accommodated in the countersunk hole.

A use method of a marine diesel engine flywheel end tightening nut tool piece comprises the following steps: selecting an adaptive tool piece according to the specification of the nut to be tightened; sleeving an angle scale on the nut to be tightened, and installing a limiting plate on the angle scale, so that the vertical surface of the limiting plate is tightly attached to the nut to be tightened, and the readings of the scale pointers of all the limiting plates are the same; making an external mark on the outer side of the angle scale, and reading a first reading of the arc scale pointed by the external mark; rotating the nut to be tightened, and reading a second reading of the arc scale pointed by the external mark; and calculating the difference value of the first reading and the second reading, namely the number of the rotated angles of the nut to be tightened.

Compared with the prior art, the invention has the beneficial effects that: the rotation angle can be controlled, the operation is simple, the construction is convenient, the technical requirement of diesel engine manufacturers on the rotation angle of the nut is met, the shipbuilding precision can be improved, the adjustment is realized, the device is used for the fastening nut with the size specification within a certain range, and the condition that the technical files of other manufacturers have the rotation angle requirement on the fastening nut can be expanded under certain conditions.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic overall structure diagram of an embodiment of the present invention.

Fig. 2 is a schematic cross-sectional view at a-a in fig. 1.

Fig. 3 is a schematic top view of the angle scale.

Fig. 4 is a schematic plan view of the stopper plate.

Fig. 5 is a schematic side view of a limiting plate.

FIG. 6 is a schematic diagram of a method of using an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1-6, this embodiment provides a marine diesel flywheel end fastening nut frock piece, frock piece includes that the inward flange cover is established and is waited angle scale 2 on the fastening nut 1, the outward flange of angle scale 2 is circularly and is provided with circular arc scale 3, be used for cooperating outside mark 4 to show angle scale 2 around the pivoted angle of autoaxis, set up two sets of relative limiting plates at least on the angle scale 2, the limiting plate is the right angle structure, vertical face 5 of limiting plate pastes tightly waits fastening nut 1, waist shape hole 7 has been seted up on the horizontal plane 6 of limiting plate, wear to establish flat head bolt 8 in the waist shape hole 7, the head of flat head bolt 8 supports and leans on the lower surface at angle scale 2, the foot section of flat head bolt 8 connects fixation nut 9 and gasket 10 and leans on the upper surface that leans on.

The inward flange of angle scale 2 is regular hexagon, and frock piece includes two sets of relative limiting plates.

A group of relative limiting plates are distributed on the left side and the right side of the angle scale 2, and another group of relative limiting plates are distributed on the upper right side and the lower left side of the angle scale 2.

The upper left and lower right of the angle scale 2 are distributed with arc scales 3, each scale represents 1 degree, and the lower left and lower right arc scales 3 comprise 60 grids.

The angle scale 2 is provided with a graduated scale 11, and the horizontal plane 6 of the limiting plate is provided with a graduated pointer 12 which is matched with the graduated scale 11 for reading and is used for determining the position of the limiting plate.

The lower surface of the angle scale 2 is provided with a countersunk hole, and the head of the flat head bolt 8 is accommodated in the countersunk hole.

A use method of a tool piece for tightening a nut at a flywheel end of a marine diesel engine comprises the following steps: selecting an adaptive tool piece according to the specification of the nut 1 to be tightened; sleeving an angle scale 2 on a nut 1 to be tightened, and installing a limiting plate on the angle scale 2, so that a vertical surface 5 of the limiting plate is tightly attached to the nut 1 to be tightened, and the readings of the scale pointers 12 of all the limiting plates are the same; making an external mark 4 on the outer side of the angle scale 2, and reading a first reading of the arc scale 3 pointed by the external mark 4; rotating the nut 1 to be tightened, and reading a second reading of the arc scale 3 pointed by the external mark 4; and calculating the difference value of the first reading and the second reading, namely the angle number rotated by the nut 1 to be tightened.

The tooling part can be used for tightening the nut at the flywheel end of the marine diesel engine, can control the rotation angle, is simple to operate, is convenient to construct, meets the technical requirement of a diesel engine manufacturer on the rotation angle of the nut, can improve the shipbuilding precision, is adjustable, and is used for the fastening nut with the size specification within a certain range.

Although the present invention has been described in detail with respect to the above embodiments, it will be understood by those skilled in the art that modifications or improvements based on the disclosure of the present invention may be made without departing from the spirit and scope of the invention, and these modifications and improvements are within the spirit and scope of the invention.