CN220437396U

CN220437396U - Cylindrical arc surface verticality calibrating device and deformation displacement measuring device

Info

Publication number: CN220437396U
Application number: CN202321855601.1U
Authority: CN
Inventors: 王广智; 吕中卿; 陈婧; 熊云; 杨帆; 王一涵; 张玥莹; 杨耿怡
Original assignee: Xian Aerospace Propulsion Institute
Current assignee: Xian Aerospace Propulsion Institute
Priority date: 2023-07-14
Filing date: 2023-07-14
Publication date: 2024-02-02
Anticipated expiration: 2033-07-14

Abstract

The utility model provides a device for calibrating verticality of a cylindrical arc surface and a device for measuring deformation displacement, which comprises a positioning piece and a guiding piece, wherein the U-shaped positioning piece comprises a first supporting plate, a second supporting plate and an end plate, the first supporting plate is parallel to the second supporting plate and is vertical to the end plate, and the front ends of the two supporting plates are provided with supporting inclined planes which are inward in a normal direction and are used for contacting with the outer wall of a cylinder; when the supporting inclined plane contacts with the outer wall of the cylinder, the surface formed by the two contact lines is parallel to the end plate, a plurality of vertical through holes are formed in the end plate, when the supporting inclined plane contacts with the cylinder, the center line of the through holes is vertically intersected with the center axis of the cylinder, the columnar guide piece is installed in one of the through holes in an interference mode, the supporting inclined plane is propped against the outer wall of the cylinder during measurement, the metal rod of the pull rod type displacement sensor passes through the center hole of the guide piece and props against the measuring point position of the outer wall of the cylinder, calibration of the measuring point position perpendicularity is achieved, the operation is simple, the efficiency is high, the result is accurate, and the problem that deviation exists in the cambered surface measuring point position perpendicularity when the displacement sensor is directly used for measurement is solved.

Description

Cylindrical arc surface verticality calibrating device and deformation displacement measuring device

Technical Field

The utility model belongs to the field of installation and calibration of displacement equipment of solid rocket engines, and particularly relates to a cylindrical arc surface verticality calibration device and a deformation displacement measurement device.

Background

In order to reduce the shell mass, improve the mass ratio of the engine and optimize the performance of the engine, a thinner solid rocket engine shell needs to be designed, and more accurate shell deformation is particularly important.

The barrel section displacement parameter measurement work in the shell deformation is mainly performed by using a pull rod type displacement sensor at present. In the ground test of the solid rocket engine, the process requires that the metal rod of the displacement sensor is perpendicular to the axis of the cylinder, but because the measuring point is positioned on the arc surface of the engine cylinder section, an operator usually depends on working experience and adopts a visual method to finish positioning measurement, and the method ensures that the perpendicularity positioning of the end part of the metal rod of the pull rod type displacement sensor at the measuring point position of the arc surface can generate deviation, thereby influencing the accuracy of the measuring point position displacement measurement result.

Disclosure of Invention

In order to solve the problem of large measurement error caused by inaccurate positioning in the existing measuring method of the arc surface deformation of the shell section of the engine, the utility model provides a cylindrical arc surface verticality calibrating device and a deformation displacement measuring device.

The technical scheme of the utility model is as follows: the device for calibrating the verticality of the cylindrical arc surface is characterized by comprising a positioning piece and a guiding piece;

the positioning piece is of a U-shaped structure composed of a first supporting plate, a second supporting plate and an end plate, and the first supporting plate is parallel to the second supporting plate and perpendicular to the end plate;

the front ends of the first support plate and the second support plate are respectively provided with a normal inward inclined plane, namely a first support surface and a second support surface, and the first support surface and the second support surface are used for being in contact with a cylindrical structure to be measured; when the first supporting surface and the second supporting surface are contacted with the cylindrical structure to be measured, the surfaces formed by the two contact lines are parallel to the end plate;

the end plate is provided with a plurality of vertical through holes, and when the first supporting surface and the second supporting surface are in contact with the cylindrical structure to be measured, the central line of the vertical through holes vertically intersects with the central axis of the cylindrical structure to be measured;

the vertical through hole is used for installing a guide piece, and the guide piece is in interference fit with the vertical through hole;

the guide piece is columnar, and a central through hole is formed along the axis.

Further, the angle between the inclined surface and the axis of the positioning piece is 15 degrees.

Further, 3 vertical through holes are uniformly distributed at the bottom of the positioning piece.

The utility model provides a cylinder cambered surface deformation displacement measuring device, includes pull rod formula displacement sensor and above-mentioned cylinder cambered surface straightness calibrating device that hangs down, and pull rod formula displacement sensor installs in the center through-hole of guide, little clearance fit.

Further, the inner diameter of the central through hole of the guide piece is 0.5mm larger than the outer diameter of the metal rod of the pull rod type displacement sensor.

The beneficial effects of the utility model are as follows:

1. when the existing method directly adopts a displacement sensor for measurement, the contact between a metal rod of the displacement sensor and the arc surface of the engine shell is single-point contact, and the measurement result is poor in accuracy due to the conditions of easy interference, collision and the like. The positioning piece and the pull rod type displacement sensor form a whole, the contact with the outer wall of the shell is changed into the end faces of the two supporting surfaces of the U-shaped groove and the center of the metal rod of the sensor, the contact range with the arc surface of the shell is enlarged, namely, the two surfaces are in contact with one point, and the metal rod of the sensor is ensured to be perpendicular to the axis of the cylinder.

2. When the existing method is adopted for measurement, about 5 minutes is needed, one person operates the displacement sensor, and the other person performs calibration on the lateral direction of the shell by a method of combining visual observation with a square; the utility model only needs one person to operate, the metal rod is inserted into the guide tube, one hand holds the calibration device, the other hand holds the displacement sensor, the operation can be completed within 2 minutes, and the working efficiency is effectively improved.

3. The utility model can calibrate the verticality of any point position of the displacement sensor on the cylinder, does not need any external equipment in the calibration process, and has simple operation and accurate measurement result.

4. The device can measure the deformation displacement of the outer cambered surfaces of the cylinders with different specifications, and has strong universality.

Drawings

FIG. 1 is a schematic diagram of a cylindrical arc surface verticality calibration device;

FIG. 2 is a schematic view of the internal rotary cutting surface of a cylinder;

FIG. 3 is a schematic cross-sectional view of a metal rod of the displacement sensor coincident with a radial line perpendicular to the cylinder's tangent plane;

fig. 4 is a schematic cross-sectional view of the metal rod of the displacement sensor perpendicular to the axis of the cylinder.

Reference numerals illustrate: 1-locating piece, 101-through hole, 102-first bearing surface, 103-second bearing surface, 2-guide piece, 3-metal pole.

Detailed Description

The technical scheme of the utility model is further described in detail below with reference to the attached drawings and the detailed description.

Referring to fig. 1-4. A device for calibrating verticality of a cylindrical arc surface comprises a positioning piece 1 and a guiding piece 2. The U-shaped groove is offered at 1 middle part of setting element, and U-shaped groove open end both sides are equipped with first holding surface 102 and second holding surface 103 for support on the cylinder cambered surface, first holding surface and second holding surface are the inclined plane, and the inclined plane normal is inwards, the angle between inclined plane and the setting element lateral wall is 15 degrees, and first holding surface and second holding surface are parallel and the size equals at the rotation tangent plane of cylinder and U-shaped tank bottom surface.

Three through holes 101 are uniformly distributed at the bottom of the positioning piece 1, and the positions of the through holes are positioned on the connecting surface of the first supporting surface and the second supporting surface. The through hole is used for installing the guide piece 2, the guide piece is in interference fit with the through hole, the installation position of the columnar guide piece is selected according to actual conditions, and structural interference is avoided.

The guide piece 2 is a cylinder, a central through hole is formed along the axis, a metal rod 3 for installing the pull rod type displacement sensor is arranged, the metal rod is in small clearance fit with the inner wall of the guide piece 2, and the inner diameter of the central through hole of the guide piece in the embodiment is larger than the outer diameter of the metal rod by 0.5mm.

Taking the deformation of the arc surface of the cylinder section of the engine shell as an example, when the engine shell is used, firstly, the positioning piece is placed on the arc surface of the cylinder section, so that the inclined surface of the opening end of the positioning piece is tightly attached to the arc surface; then, the metal rod of the pull rod type displacement sensor is inserted into the through hole of the columnar guide piece, so that the head of the metal rod is contacted with the arc surface, and the arc surface deformation of the cylinder section of the engine shell can be measured through the pull rod type displacement sensor. The method is simple to operate and high in measurement accuracy.

While embodiments of the present utility model have been shown and described, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives, and variations may be made to the above embodiments by those skilled in the art without departing from the spirit and principles of the utility model and are intended to be included within the scope of the utility model.

Claims

1. The device for calibrating the verticality of the cylindrical cambered surface is characterized by comprising a positioning piece and a guiding piece;

2. The cylindrical camber alignment device according to claim 1, wherein the angle between the inclined surface and the axis of the positioning member is 15 degrees.

3. The device for calibrating verticality of a cylindrical arc surface according to claim 1, wherein 3 vertical through holes are uniformly distributed at the bottom of the positioning piece.

4. The cylindrical arc surface deformation displacement measuring device is characterized by comprising a pull rod type displacement sensor and the cylindrical arc surface verticality calibrating device according to claim 1, wherein the pull rod type displacement sensor is arranged in a central through hole of a guide piece and is in small clearance fit.

5. The cylindrical arc deformation displacement measuring device according to claim 4, wherein the inner diameter of the central through hole of the guide member is 0.5mm larger than the outer diameter of the metal rod of the pull rod type displacement sensor.