CN210318226U

CN210318226U - Metal laminated coupler with good processing technology performance

Info

Publication number: CN210318226U
Application number: CN201920916220.7U
Authority: CN
Inventors: 闵旭光; 罗飞霞; 方军
Original assignee: Jiangxi Science and Technology Normal University
Current assignee: Jiangxi Science and Technology Normal University
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-04-14
Anticipated expiration: 2029-06-18

Abstract

The utility model discloses a metal laminated coupler with good processing technique performance, which comprises a coupler lamination, wherein a through hole is punched between a central hole of the coupler lamination and a first group of ring-shaped screw holes, and the diameter of the through hole is 3mm larger than that of a positioning pin; drilling and reaming a positioning pin hole at the corresponding position of the generator shaft sleeve, wherein the pin hole is in interference fit with the positioning pin; the length of the positioning pin exceeding the shaft sleeve is equal to the thickness of the coupling lamination set plus 2 mm; fastening the lamination stack on a shaft sleeve of the generator by using screws through a first group of annular holes of the coupling lamination stack; the gap between the locating pin and the lamination is filled with an inorganic binder. The beneficial effects of the utility model are that cancelled the corresponding high accuracy keyway of processing in shaft coupling lamination and motor shaft, solved the shaft coupling lamination and be difficult to install the epaxial assembly difficult problem of generator pivot, changed the key drive in the past into the pin drive of easy processing and assembly.

Description

Metal laminated coupler with good processing technology performance

Technical Field

The utility model relates to a diesel generating set power field especially relates to a metal lamination shaft coupling with good processing technology performance.

Background

The diesel engine and the generator are assembled into a diesel generator set, generally mounted horizontally and connected through a metal laminated coupler. Each laminated sheet of the coupling laminated sheet group is a disc sheet, and a central hole and two groups of round holes are formed in the disc sheet. Each group of round holes consists of more than ten round holes with the same diameter, equal distance with the central hole of the disk piece and evenly distributed along the circumferential direction of the disk piece. The disk sheet is arranged on a flywheel of the diesel engine by penetrating the round holes far away from the central hole of the disk sheet by screws; and the disk plate is arranged on the shaft sleeve of the generator by penetrating the group of round holes close to the central hole of the disk plate through screws. Thus, the diesel engine can transmit torque to the generator through the friction force between the screw and the disc plate.

When the same torque is transmitted, the group of screws arranged on the generator shaft sleeve needs to provide larger friction force due to the closer distance from the center of the coupling disc plate, namely the moment arm is shorter, namely the pressure required for providing the disc plate by the group of screws is larger. The screws close to the central hole of the disk plate are distributed on the smaller circumference of the disk plate, the distance between the adjacent screws is smaller, the number of the increased screws is limited in design, and the pressure provided by the screws is also limited, so that the capacity of the set of screws arranged on the shaft sleeve of the generator for transmitting torque is often insufficient. At present, a key groove is mainly added on the circumferential edge of a central hole of a disk plate, namely, key transmission is added to assist a screw to transmit torque.

However, the machining process for adding the key transmission structure on the disc sheets of the coupler is not good. The main reason is that the coupling disc sheet is made of acid-resistant stainless steel or a spring steel sheet, a key groove is punched on a central hole of the coupling disc sheet, and the size and form and position tolerance of the obtained key groove are low, generally in IT12 level; even if the common cutting machining is adopted, the obtained stable size and form and position tolerance grade is at most IT9 grade, the machining time is hundreds of times longer than the punching machining time, and the production efficiency is too low. The key transmission is added on the coupling disc plate, and a corresponding key groove is processed on the rotating shaft of the generator. The key and keyway must also be a clearance fit, otherwise it is very difficult to mount the coupling laminations (discs) to the generator shaft. Therefore, the clearance fit between the key and the key groove can cause the key and the key groove to generate a contact phenomenon when transmitting torque, namely when the diesel generating set is started, the key groove of the coupling lamination touches the side surface of the key to drive the key to rotate, and the key drives the rotating shaft of the generator to rotate; when the diesel generating set stops operating, the side face of the key can be separated from the side face of the laminated key groove by the rotating shaft of the generator due to huge inertia. This can easily cause premature failure of the keys or keyways of the coupling laminations.

Therefore, the utility model discloses a metal lamination shaft coupling that processing, installation manufacturability are all better is very necessary.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a metal lamination shaft coupling with good processing technology performance to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme: and a key groove structure on the coupling lamination is eliminated, and the corresponding key groove machined on the rotating shaft of the generator is eliminated. Punching a through hole between the central hole of the coupler lamination and the first group of annular screw holes, wherein the diameter of the through hole is 3mm larger than that of the positioning pin, and the tolerance is in accordance with IT14 level; and drilling and reaming a positioning pin hole at the corresponding position of the shaft sleeve of the generator, wherein the positioning pin hole and the positioning pin are in interference fit. Firstly, mounting a key and a shaft sleeve on a rotating shaft of a generator, and then driving a positioning pin into the shaft sleeve, wherein the length of the positioning pin exceeding the shaft sleeve is equal to the thickness of a laminated sheet group of a coupler plus 2 mm; then, sleeving a steel auxiliary mounting bush into the positioning pin, wherein the auxiliary mounting bush is in clearance fit with the outer circle of the positioning pin and the newly-increased holes of the lamination, and the length of the auxiliary mounting bush is equal to the thickness of the lamination group plus 20 mm; then the coupling lamination is installed on the shaft sleeve, and the newly added through hole of the lamination is sleeved on the excircle of the auxiliary installation bush; screws are arranged in the shaft sleeve, and the shaft coupling lamination is fastened on the shaft sleeve of the generator; taking away the auxiliary mounting bush; the generator rotating shaft is lifted and vertically placed on a special tool, a certain amount of molten inorganic binder is poured into a gap between the positioning pin and the newly-added through hole of the lamination, and the generator rotating shaft is cooled and solidified at room temperature. A batch of the generator rotating shafts are lifted and vertically placed, and then the inorganic binder is poured into the gap between the positioning pin and the newly-added through hole of the coupling lamination, so that the operation is more time-saving. The inorganic binder is nontoxic, has good operation manufacturability, convenient use, good adaptability to working conditions such as heat resistance, oil resistance, aging resistance and the like, high bonding strength, compression strength, tensile strength and shear strength of more than 100MPa, easily available raw materials and low price.

Compared with the prior art, the beneficial effects of the utility model are that: the metal laminated coupler which is easy to process and assemble eliminates a key groove with high precision on the laminated coupler and a corresponding key groove structure which weakens the strength of a rotating shaft of a generator; the assembly problem that the coupling lamination is difficult to mount on the rotating shaft of the generator is solved; the prior key transmission is changed into pin transmission which is easy to process and assemble.

Drawings

Fig. 1 is a front view of the metal laminated coupler of the present invention with good processing performance.

Fig. 2 is a right side view of the metal laminated coupling with good manufacturability according to the present invention, relative to fig. 1.

In fig. 1: 1. a coupler lamination; 2. positioning pins; 3. a shaft sleeve; 4. a key; 5. a rotating shaft;

6. and (4) screws.

In fig. 2: I. a first set of annular screw holes; II. A second set of annular screw holes.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1 and fig. 2, the present invention provides a technical solution: punching a through hole between the central hole of the coupler lamination (1) and the first group of annular screw holes (I), wherein the diameter of the through hole is 3mm larger than that of the positioning pin (2), and the tolerance is in accordance with IT14 level; and drilling and reaming a positioning pin hole at the corresponding position of the shaft sleeve (3) of the generator, wherein the positioning pin hole is in interference fit with the positioning pin (2). Firstly, a key (4) and a shaft sleeve (3) are installed on a rotating shaft (5) of a generator, then a positioning pin (2) is driven into the shaft sleeve (3), and the length of the positioning pin (2) exceeding the shaft sleeve (3) is equal to the thickness of a laminated sheet group of a coupler plus 2 mm; in order to ensure that a bolt can fix the lamination on the shaft sleeve (3) through a first group of annular screw holes (I) of the lamination (1), an auxiliary mounting bush is specially made, the auxiliary mounting bush is in clearance fit with the excircle of the positioning pin (2) and a newly-added hole of the lamination (1), and the length of the auxiliary mounting bush is equal to the thickness of the lamination group plus 20 mm; the special auxiliary mounting bush is sleeved on the positioning pin (2); then the coupling lamination (1) is installed on the shaft sleeve (3), and a through hole newly added to the lamination (1) is sleeved on the outer circle of the auxiliary installation bush; screws (6) are arranged in the shaft sleeve, and the shaft coupling lamination (1) is fastened on the shaft sleeve (3) of the generator; and taking away the auxiliary mounting bush, lifting the generator rotating shaft (5) to vertically place on a set of special tool, pouring a certain amount of molten inorganic binder into the gap between the positioning pin (2) and the newly-added through hole of the lamination (1), and cooling and solidifying at room temperature. A batch of the generator rotating shafts are lifted and vertically placed, and then the inorganic binder is poured into the gap between the positioning pin and the newly-added through hole of the coupling lamination, so that the operation is more time-saving. And finally, fixing the lamination (1) on the flywheel of the diesel engine by using screws through a second group of screw holes (II) on the lamination (1).

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a metal lamination shaft coupling with good processing technology performance which characterized in that: the coupler is characterized by comprising a coupler lamination (1), wherein a through hole is punched between a central hole of the coupler lamination and a first group of annular screw holes (I), the diameter of the through hole is 3mm larger than that of a positioning pin (2), and the tolerance is in accordance with IT14 level; and drilling and reaming a positioning pin hole at the corresponding position of a shaft sleeve (3) of the generator, wherein the positioning pin hole is in interference fit with the positioning pin (2).

2. The metal laminated coupling with good processing property of claim 1, wherein: the length of the positioning pin (2) exceeding the shaft sleeve (3) is equal to the thickness of the laminated stack of the shaft coupling plus 2 mm.

3. The metal laminated coupler with good processing performance as claimed in claim 1, wherein: and gaps between the positioning pins (2) and the lamination (1) are filled with inorganic bonding agents.