A kind of tool for displacement collection when solid rocket engine shell hydraulic test

Abstract

The application provides a solid rocket engine shell hydraulic test displacement collection tool, which is characterized by comprising a fixed base (1), a sliding base (2), a limiting block (3), a displacement clamping device assembly (4) and a sliding rail (5); the fixed base (1) comprises a flat base and a support; the sliding base (2) is symmetrical to the support structure fixed to the base (1) and is located on the other side of the flat base; the limiting block (3) is located outside the sliding base (2); the displacement clamping device assembly (4) is located above the sliding rail (5) and comprises a sliding block (6), a support rod A (7), a support rod B (8), a displacement meter clamping device (9) and a displacement meter (10). The application can effectively solve the problems of shell rigid body displacement and displacement meter measuring point deviation of the solid rocket engine shell and similar cylindrical pressure-bearing structural members in the hydraulic test process and accurately detect the radial displacement change of the solid rocket engine shell in the bearing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of solid rocket engine and pressure vessel, in particular to a kind of tool for displacement collection when solid rocket engine shell hydraulic test. BACKGROUND

[0002] The displacement change in the working process of solid rocket engine shell reflects the coincidence of the technical state and the design state of the shell, which has an important influence on the launch of the engine and the determination of the state of the engine. At present, simple sleeper support is used for engine shell during hydraulic test, and rigid body displacement and displacement meter and measuring point offset phenomenon often occur in the process of displacement collection due to the action of internal pressure load, which leads to inaccurate displacement test results.

[0003] The tool for displacement collection when solid rocket engine shell hydraulic test provided by the present application comprehensively considers the clamping of different shell diameters, the clamping and positioning of displacement testing device, the geometric relationship in the displacement process of shell and the possible blasting factors in the hydraulic process of shell. The designed structure can accurately and efficiently measure the radial displacement change in the hydraulic process of shell, and different shell diameters can be tested by one set of tool. SUMMARY

[0004] The technical problem solved by the present application is to provide a tool for displacement collection when solid rocket engine shell hydraulic test, to solve the problems of inaccurate displacement collection during hydraulic test of current solid rocket engine shell and other cylindrical pressure vessels, the inability of hydraulic tool to meet the test of shell with multiple diameters, and the rigid body displacement of displacement meter caused by gravity after clamping.

[0005] To solve the above problems, the present application provides a tool for displacement collection when solid rocket engine shell hydraulic test, characterized in that it comprises a fixed base 1, a sliding base 2, a limiting block 3, a displacement clamping device assembly 4 and a sliding rail 5.

[0006] The fixed base 1 comprises a flat base and a support, and the support is fixed to one side of the flat base.

[0007] The sliding base 2 is symmetrical to the support structure fixed to the base 1, located on the other side of the flat base, and moves left and right through the rectangular sliding rail slot at the bottom to adjust the distance from the support.

[0008] The limiting block 3 is located outside the sliding base 2 and connected with the fixed base 1, used to limit the sliding base 2.

[0009] The sliding rail 5 is respectively located at the top of the support of the fixed base 1 and the sliding base 2.

[0010] The displacement clamping device assembly 4 is located on the slide rail 5, and includes a sliding block 6, a support rod A 7, a support rod B 8, a displacement meter clamping device 9 and a displacement meter 10, and the sliding block 6 is a support point; the sliding block 6 moves through the slide rail 5, so that the displacement clamping device assembly 4 realizes the axial positioning function along the measured shell; the support rod A 7 and the support rod B 8 are locked, so as to realize the change of the total arm length within a certain range; the tail end of the support rod B 8 is hinged with the displacement meter clamping device 9; and the displacement meter 10 is clamped and locked through a pair of displacement meter clamping devices 9.

[0011] Further, the flat plate base of the fixed base 1 is a metal flat plate, a rectangular slide rail groove is arranged in the middle of the metal flat plate, and equidistant threaded holes are arranged on both sides of the rectangular slide rail groove.

[0012] Further, the fixed base 1 support and the sliding base 2 are both made of metal profiles and are spliced by welding or hinged blocks and screws.

[0013] Further, the fixed base 1 support and the sliding base 2 top plate are both engraved with a distance scale, and the numerical values correspond to each other, so as to realize the rapid positioning of the displacement testing device.

[0014] Further, the connection mode of the flat plate base 1 and the ground is a foundation bolt or a base equipped with a support base caster.

[0015] Further, the front end of the support rod A 7 is a connecting through hole, and the rear end is a round rectangular through groove.

[0016] Further, the front end of the support rod B 8 is a connecting through hole, and a long groove is arranged along the middle surface, so as to ensure the flexibility of the front end of the support rod B 8 in the thickness direction.

[0017] Further, the displacement meter includes a contact type and a non-contact type.

[0018] Further, the use method of the tool is as follows:

[0019] The included angle between the fixed base 1 and the sliding base 2 and the support of the measured shell is 2 alpha, the radius of the cylinder section of the measured shell before hydraulic testing is R, and the radius changes to R' after bearing; the geometric relationship between the radial displacement change ΔR and the displacement meter reading change ΔL is ΔR = ΔL / (1 / sin alpha + 1), and the displacement collection is completed during the hydraulic testing.

[0020] Compared with the prior art, the beneficial technical effects of the present application are:

[0021] (1) The displacement collection efficiency of the present application is fast and the precision is high, the shell radial displacement can be collected without arranging the opposite side strain collection device, the displacement measuring point positioning is simple, and the collected displacement data has high reliability;

[0022] (2) The application facilitates strain collection during displacement collection, adopts a skeleton structure to facilitate strain collection requirements of each quadrant measuring point during shell testing, and can solve shell testing in a wider caliber interval through movement of the sliding base, and can meet displacement collection of multiple points;

[0023] (3) The application has good structural stability, high durability and long service life, the steel profile used by the device has good bearing performance, the skeleton structure can avoid possible blasting impact during shell hydraulic process to a certain extent, the displacement testing system can be disassembled, and has good interchangeability when the device is damaged;

[0024] (4) The application has good economy and high process maturity, the support frame can be prepared by directly purchasing steel profiles, the sliding rail can be directly purchased, and the connection mode adopts common screws, nuts and welding. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 is an isometric view of the displacement collection tool during solid rocket engine shell hydraulic testing.

[0026] Figure 2 is a left view of the displacement collection tool during solid rocket engine shell hydraulic testing.

[0027] Figure 3 is a partial detail view of the displacement clamping device of the displacement collection tool during solid rocket engine shell hydraulic testing.

[0028] Figure 4 is a design principle diagram of the displacement collection tool during solid rocket engine shell hydraulic testing.

[0029] The figure reference is: 1, fixed base; 2, sliding base; 3, limit block; 4, displacement clamping device assembly; 5, sliding rail; 6, sliding block; 7, support rod A; 8, support rod B; 9, displacement meter clamping device; 10, displacement meter. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the application. Therefore, the application is not limited by the specific embodiments disclosed below.

[0031] As Figure 1 is an isometric view of the displacement collection tool during solid rocket engine shell hydraulic testing and Figure 2The left view of the displacement collection tool for the solid rocket engine shell hydraulic test shows that the displacement collection tool for the solid rocket engine shell hydraulic test of the present application comprises a fixed base 1, a sliding base 2, a limiting block 3, a displacement clamping device assembly 4, a sliding rail 5, and other connecting pieces and fasteners.

[0032] The fixed base 1 comprises a flat base and is connected with a support on one side of the surface, the support is made of metal profiles spliced, and each profile is connected by welding or hinged block cooperation screw. The flat plate at the top end of the support is engraved with a distance scale, which is used to realize the rapid positioning of the displacement testing device. In an embodiment, the fixed base 1 is composed of a flat base and a support on one side, the support is made of 45# steel profiles by welding, and the distance scale is marked on the flat plate at the top end of the support, with a minimum scale of 1mm.

[0033] The bottom of the support is a metal flat base, a rectangular sliding rail slot is opened in the middle of the flat base, and a plurality of equidistant threaded holes are opened on both sides of the slot. In an embodiment, two rectangular sliding rail slots are opened in the middle of the flat base, 5 rows of 20mm equidistant threaded holes are opened on both sides of the slot, the base is 1500mm long and 1000mm wide, and it can well meet the use of the shell with a diameter of Ф150mm to Ф800mm and a length of 200mm to 3000mm in actual use.

[0034] The bottom of the flat base is connected with the ground through foundation bolts, which has the advantages of low cost, long service life, good bearing performance, etc.; when the connection is replaced by a base equipped with support base casters, it has the functions of height adjustment, movement and locking.

[0035] The sliding base 2 has a structure similar to the support of the fixed base 1, for example, in addition to the fixed mode, it is symmetrical with the support in shape and structure, is installed on the other side of the surface of the fixed base 1 opposite to the support, and two rectangular sliding rails are opened at the bottom to cooperate with the fixed base 1 for use, so as to realize the left and right movement of the sliding base 2 and adjust the distance with the support. The form of the sliding rail can be replaced adaptively according to the actual bearing demand.

[0036] In an embodiment, the sliding base 2 is in the form of a support and is made of metal profiles spliced, and a distance scale is engraved on the flat plate at the top end of the support, the scale value corresponds to the scale on the flat plate at the top end of the fixed base 1, and the two sides are ensured to be uniform in scale when the strain collection device is positioned, so as to ensure the consistency in the horizontal direction and the centration of the displacement testing device. Two rectangular sliding rails at the bottom are used in cooperation with the fixed base 1 to realize the left and right movement of the sliding base.

[0037] The limiting block 3 is connected with the fixed base 1 in cooperation with a locking screw in a roughly L-shaped structure, which can limit the movement of the sliding base 2.

[0038] As Figure 3The partial detail view of the displacement clamping device in the displacement collection tool during the hydraulic test of the solid rocket engine shell is shown in the figure, the displacement clamping device assembly 4 is composed of a sliding block 6, a support rod A 7, a support rod B 8, and a displacement meter clamping device 9, wherein the sliding block 6 cooperates with the slide rail 5 to realize the axial free positioning function of the displacement clamping device assembly 4 along the shell to be tested, and the scale ruler can be quickly and accurately positioned.

[0039] The support rod A 7 has a connecting through hole at the front end and a round rectangular through slot at the rear end, the support rod B 8 has a connecting through hole at the front end and a slot along the middle surface, which can ensure the flexibility of the front end of the support rod B 8, and the two can realize the change of the total arm length within a certain range, and the locking between the two is realized through the screw-washer-nut structure.

[0040] The tail end of the support rod B 8 is hinged with the displacement meter clamping device 9, and the clamping and locking function of the displacement meter 10 is realized through a pair of displacement meter clamping devices 9 cooperating with the screw-nut structure. The displacement meter can be selected according to the use condition.

[0041] As Figure 4 The design principle of the displacement collection tool during the hydraulic test of the solid rocket engine shell is shown in the figure, the main principle of the tool design is that the fixed base 1 and the sliding base 2 are set between the supports in contact with the shell to be tested at an angle 2α, when the radius of the front cylinder segment of the shell to be tested is R, the radius changes to R' after bearing pressure; the geometric relationship between the radial displacement change ΔR and the indication change ΔL of the displacement meter is ΔR=ΔL / (1 / sinα+1), in the example α=30°, ΔR=ΔL / 3.

[0042] The present application can effectively solve the problems of rigid body displacement of the shell and displacement meter point offset of the shell during the hydraulic testing process of the solid rocket engine shell and similar cylindrical pressure-bearing structural members, can accurately detect the radial displacement change of the solid rocket engine shell during the bearing process, and has the following specific advantages: (1) the displacement acquisition system is simple to operate, efficient and accurate, the radial displacement of the shell can be acquired without arranging the opposite strain acquisition device, the displacement measurement point is simple to position, the acquired displacement data is highly reliable, and the displacement acquisition of multiple points can be met; (2) the strain acquisition during the displacement acquisition process is convenient, the skeleton structure facilitates the strain acquisition requirement of the measurement points in each quadrant during the shell testing process; (3) good applicability, the testing of the shell with a wider caliber interval can be solved by moving the sliding base; (4) good structural stability, high durability and long service life, the metal profile used by the device has good bearing performance, and the skeleton structure can avoid the possible blasting impact during the hydraulic process of the shell to a certain extent, the displacement testing system can be disassembled, and has good interchangeability when the device is locally damaged; (5) good economy and high process maturity, the support frame can be prepared by directly purchasing metal profiles, the sliding rail can be directly purchased, and the connection mode adopts common screws, nuts and welding.

[0043] The content not described in detail in the specification belongs to the prior art known to those skilled in the art. It is obvious for those skilled in the art that the present application is not limited to the details of the above exemplary embodiments, and the present application can be implemented in other specific forms without departing from the spirit or essential characteristics of the present application. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting, the scope of the present application is defined by the appended claims rather than the above description, and therefore all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present application.

Claims

1. A tool for collecting displacement during hydraulic testing of a solid rocket motor casing, characterized in that: It comprises a fixed base (1), a sliding base (2), a limit block (3), a displacement clamping device assembly (4), and a slide rail (5); The fixed base (1) comprises a flat base and a bracket, and the bracket is fixed to one side of the flat base; The sliding base (2) is symmetrical with the bracket structure fixed to the base (1), is located on the other side of the flat base, and moves left and right through the rectangular slide groove at the bottom to adjust the distance from the bracket; The limiting block (3) is located outside the sliding base (2), connected to the fixed base (1), and is used to limit the sliding base (2); The slide rails (5) are respectively located on the bracket of the fixed base (1) and the top plane of the sliding base (2); The displacement clamping device assembly (4) is located on the slide rail (5), and includes a slider (6), a support rod A (7), a support rod B (8), a displacement meter clamping device (9) and a displacement meter (10), with the slider (6) as a support point; the slider (6) moves through the slide rail (5) to realize the axial positioning function of the displacement clamping device assembly (4) along the shell to be measured; the support rod A (7) and the support rod B (8) are locked to realize the change of the total arm length within a certain range; the tail end of the support rod B (8) is hinged to the displacement meter clamping device (9); the displacement meter (10) is clamped and locked by a pair of displacement meter clamping devices (9).

2. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The flat plate base of the fixed base (1) is a metal flat plate, the middle of which is a rectangular slide rail groove, and both sides of the rectangular slide rail groove are provided with equidistant threaded holes.

3. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The fixed base (1) bracket and the sliding base (2) are both made of metal profiles by welding or splicing hinge blocks with screws.

4. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The fixed base (1) bracket and the top flat plate of the sliding base (2) are both engraved with distance scales with corresponding values, which are used to achieve rapid positioning of the displacement test device.

5. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The connection mode of the flat base (1) to the ground is anchor bolts or the base is equipped with supporting base casters.

6. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The front end of the support rod A (7) is a connecting through hole, and the rear end is a rounded rectangular through groove.

7. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The front end of the support rod B (8) is a connecting through hole, and a long groove is opened along the middle surface to ensure the flexibility of the front end of the support rod B (8) along the thickness direction.

8. The tooling for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The displacement meter includes contact type and non-contact type.

9. The tool for collecting displacement during hydraulic testing of a solid rocket motor casing according to claim 1, characterized in that: The method of using the tooling is as follows: The angle between the fixed base (1) and the bracket contacting the sliding base (2) and the shell to be tested is set to 2α. When the radius of the cylinder section of the shell to be tested before the hydraulic test is R and the radius changes to R' after the pressure is applied, the geometric relationship between the radial displacement change ΔR and the reading change ΔL of the displacement meter is ΔR=ΔL / (1 / sinα+1), thereby completing the collection of displacement during the hydraulic test.

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