CN109741679B

CN109741679B - Method for preparing frequency correction device

Info

Publication number: CN109741679B
Application number: CN201910110493.7A
Authority: CN
Inventors: 陈渝; 任静; 周黎明; 谭向军; 李兴钢
Original assignee: Chengdu CAIC Electronics Co Ltd
Current assignee: Chengdu CAIC Electronics Co Ltd
Priority date: 2019-02-12
Filing date: 2019-02-12
Publication date: 2024-02-20
Anticipated expiration: 2039-02-12
Also published as: CN109741679A

Abstract

The invention discloses a method for preparing a frequency correction device, which aims to provide a preparation method of the frequency correction device with firmness, reliability, simplicity, convenience and stability, and is realized by the following technical scheme: preparing a rectangular flange base and a revolving body shell on the rectangular flange base, manufacturing a rib polygonal necking cylinder at the lower part of the revolving body shell, dividing the upper part of the necking cylinder into two layers by a partition wall, manufacturing an electric correction chamber in the partition wall, arranging a flange cylinder body with a step hole above the electric correction chamber, assembling an inner gear ring cylinder of a thin-wall revolving body in the flange cylinder body, and arranging an inner gear on the inner circumference of the inner gear ring cylinder. The invention adopts the base with a rectangular flange plate and the revolving body shell on the base, the lower part of the revolving body shell is provided with the rib polygonal necking cylinder, the upper part of the necking cylinder is divided into two layers by the partition wall, and the partition wall is provided with the electric correction chamber, so that the invention is firm, reliable, simple, convenient and stable, and can meet the use requirement even if the vibration magnitude is large.

Description

Method for preparing frequency correction device

Technical Field

The invention mainly relates to a method for reliably assembling a label preparation frequency correction device on a thin-wall revolving body.

Background

The frequency is one of the basic indexes for measuring the quality of electric energy, and the essence of frequency correction is to introduce the characteristic of the correction device to change the shape of the open loop logarithmic frequency characteristic of the original system so as to enable the characteristic to meet the given performance index. The calibration is used to reform certain undesired links, eliminate or weaken some adverse factors, and make the system meet the required performance index. The frequency correction device is an execution component in a feedback link, has small volume and presents a thin-wall revolution structure. The common correction method is serial correction and parallel correction. The series correction is additionally provided with an open loop zero and a pole, so that the system performance is improved. The open loop bandwidth of the series lead correction system is not large, and the stability or stability margin is not enough. The parallel correction (local feedback correction) utilizes feedback signals such as speed, acceleration and the like to improve the performance interference compensation correction of the local or system and improve the anti-interference performance of the system. Feedback correction alters local link characteristics to improve system performance. The essence of designing a control system by a frequency domain method is to add a correction device with proper frequency characteristic shape into the system so as to change the frequency characteristic of an open loop system into a desired shape. The frequency adjustment of the aircraft engine about the generator control system relates to the adoption of a frequency correction device, and energy and equipment are reasonably utilized on the premise of meeting the requirements of stable system frequency and system safety. When in use, correction indexes are needed to be obtained, and the frequency characteristics of the system are changed by introducing a phase advance correction link to the system through connecting the system by using a resistor and a capacitor. Firstly, a proper correction mode is required to be selected according to a given performance index to correct an original system, and the value of a steady-state error is required to obtain the variation range of the gain K when the system is stable, so that the variation range meets the working requirement. It may include two phases, coarse frequency correction and fine frequency correction, in harsh environments where frequency dispersion and time dispersion exist. Since the engine vibrates greatly and the load changes at any time, the frequency of the system also changes correspondingly, and when the system load changes greatly, the frequency change range exceeds the specified range. System instability, often with uncertainty in certification and frequency measurements, vibration is a major source of output frequency inaccuracy. In order to avoid the phenomenon of overshoot or frequency instability for a long time during the frequency adjustment, the structure of the revolution solid as the small volume must be stable and reliable. In order to make the correction device overly complex, the high frequency band of the desired characteristics is consistent with the uncorrected system characteristics. The labels are attached to the concentric revolution structure, and the labels are required to be bonded, screwed or riveted.

Disclosure of Invention

Aiming at the defects existing in the prior art, the invention provides a method for preparing the frequency correction device, which is firm, reliable, simple, convenient and stable.

The invention is achieved by the following measures. A method for preparing frequency corrector includes preparing base of rectangular flange plate and rotary body shell on it, preparing polygonal necking cylinder with ribs at lower part of rotary body shell, dividing wall at upper part of necking cylinder into two layers, preparing electric correction chamber in partition wall, setting flange plate cylinder with stepped hole on top of electric correction chamber, assembling internal gear ring cylinder of thin-wall rotary body in flange plate cylinder, setting internal gear on internal circumference of internal gear ring cylinder.

Compared with the prior art, the invention has the following beneficial effects.

Firm, reliable, simple and stable. The invention adopts the base with a rectangular flange plate and the revolving body shell on the base, the lower part of the revolving body shell is provided with the polygonal necking cylinder with the ribs, the upper part of the necking cylinder is divided into two layers by the partition wall, and the electric correction chamber is arranged in the partition wall, so that the invention is firm, reliable, simple and stable. The thin wall of the revolving body shell is provided with a label fixed by red copper rivets, and the label is integrated with the assembled revolving body shell. Compared with bonding, the label is more reliable to fix, and the aging and degumming of the adhesive are not worried. The problems of screw connection and less threads on the thin-wall part are solved, the upsetting countersunk head and hanging cap are realized in the limited space of the actual rivet on the thin-wall part, and even if the vibration magnitude is large, the use requirement can be met.

Drawings

Fig. 1 is a schematic three-dimensional structure of a device for preparing frequency correction according to the present invention.

Fig. 2 is a cross-sectional view of fig. 1.

Fig. 3 is an exploded view of fig. 1.

In the figure: 1 an inner gear ring cylinder, 2 a revolving body shell, 3 red copper rivets and 4 labels.

The invention will be further described with reference to the drawings and examples, without thereby restricting the invention to the scope of the examples.

Detailed Description

See fig. 1-3. According to the invention, a rectangular flange base and a revolving body shell on the rectangular flange base are prepared, a rib polygonal necking cylinder is prepared at the lower part of the revolving body shell, the upper part of the necking cylinder is divided into two layers by a partition wall, an electric correction chamber is prepared in the partition wall, a flange cylinder body with a step hole is arranged above the electric correction chamber, an inner gear ring cylinder of a thin-wall revolving body is assembled in the flange cylinder body, and an inner gear is arranged on the inner circumference of the inner gear ring cylinder. The thin wall of the revolving body shell 2 is provided with a label 4 fixed by a red copper rivet 3, and the label 4 and the assembled revolving body shell 2 are integrally arranged. The inner ring gear cylinder 1 and the rotator housing 2 are different in function and material and are processed separately. The inner gear ring cylinder 1 is made of stainless steel, an inner gear is arranged on the inner circumference, the revolving body shell 2 is an aluminum piece, and the inner gear ring cylinder 1 is surrounded by the revolving body shell 2, and the inner gear ring cylinder 1 and the revolving body shell are assembled into a whole. The thin wall of the revolving body shell 2 is provided with a label 4 by a red copper rivet 3. To fix a label on a thin-walled solid of revolution structure of small volume. The riveting mode is adopted to drill the label and the thin-wall revolving body with proper through holes of the riveted rivet, the red copper rivet 3 fixes the label 4, the rivet head is arranged on the left side, the rivet tip is arranged on the right side, the shell on the right side is subjected to countersunk head type reaming, countersunk head type reaming is carried out on the other side, far away from the rivet head end, of the thin-wall revolving body mounting rivet, the rivet penetrates through the label, the red copper rivet 3 penetrates through the label 4 to enter the inner wall of the revolving body shell 2, the rivet tip is thickened and flattened on the inner wall, and the effect of no falling off in the hanging mode is achieved. The purposes of tensioning the label and hanging the shell are achieved.

The present invention is not limited to the above-described embodiments, and any other various forms of products may be obtained by any person in the light of the present invention, but various substitutions and alterations may be made without departing from the spirit and scope of the present invention.

Claims

1. A method for preparing frequency correction device includes preparing base of rectangular flange plate and rotary body shell on base, preparing necking cylinder with rib polygon on lower part of rotary body shell, forming electric correction chamber in partition wall, setting flange plate cylinder with stepped hole on top of electric correction chamber, assembling internal gear on internal circumference of internal gear cylinder, setting rotary body shell (2) as aluminum piece and enclosing internal gear cylinder (1) as a whole.

2. A method of making a frequency correction device as defined in claim 1, wherein: a label (4) fixed by a red copper rivet (3) is arranged at the thin wall of the revolving body shell (2), and the label (4) and the assembled revolving body shell (2) are integrally arranged.

3. A method of making a frequency correction device as defined in claim 1, wherein: the thin wall of the revolving body shell (2) is provided with a sign (4) by a red copper rivet (3).

4. A method of making a frequency correction device as defined in claim 1, wherein: in order to fix the label on the thin-wall revolving body structure with small volume, a riveting mode is adopted to drill and rivet through holes in the label and the thin-wall revolving body, a red copper rivet (3) is used for fixing the label (4), the left side is a rivet head, the right side is a rivet tip, a right side shell is subjected to countersunk head type reaming, the other side, far away from the rivet head end, of the thin-wall revolving body is provided with the rivet, countersunk head type reaming is performed, the rivet penetrates through the label, the red copper rivet (3) penetrates through the label (4) to enter the inner wall of the revolving body shell (2), and the rivet tip is thickened and flattened on the inner wall.