CN116026575A - Static pressure comprehensive loading test structure of casing - Google Patents

Abstract

The invention discloses a static pressure comprehensive loading test structure of a casing, which comprises the following steps: the device comprises a device base, a casing to be tested, a bearing cylinder group, a sealing device and a limiting device, wherein the casing to be tested is fixedly supported on the device base. The lower end of the bearing cylinder group is respectively connected with the inner wall and the outer wall of the upper opening ring cavity of the casing to be tested so as to form an inner pressure cavity and an outer pressure cavity. The sealing device is respectively arranged in the internal pressure cavity and the external pressure cavity to seal the openings of the internal pressure cavity and the external pressure cavity respectively and enable the inner wall and the outer wall of the bearing cylinder group and the casing to be tested to deform independently. The limiting device is arranged on the device base and is connected with the sealing device, so that the sealing device is limited in the inner pressure cavity and the outer pressure cavity which are correspondingly arranged. The structure of the invention can effectively avoid the mutual transmission of the load borne by the mounting surfaces A, B and C due to the sealing device, so that the deformation of the inner cavity and the outer cavity is not interfered with each other, thereby ensuring the true result of the loaded state of the casing to be tested, ensuring the authenticity of test examination, and further ensuring the correct stressed state of the casing to be tested.

Description

Static pressure comprehensive loading test structure of casing

Technical Field

The invention relates to the field of integrated static pressure comprehensive loading tests of engine cases, in particular to a static pressure comprehensive loading test structure of a case.

Background

The casing is a bearing part of the engine, is an important part for supporting a rotor and a fixed stator, is also an important bearing component of the engine, bears motor loads such as thrust, inertia force, torque and the like of the engine, bears internal gas flow pressure load at the same time, and has to be subjected to static test and examination containing the pressure load according to the GJB242A requirement.

In the static test of the casing, motor loads such as engine thrust, inertial force, torque and the like are applied to the mounting edge of the casing, and simultaneously, pressure loads are applied to the inside of the casing. For the casing with the annular cavity structure and the pressure state, when test pressure is applied to the annular cavity, the problems that the inner wall and the outer wall of the annular cavity bear the pressure and simultaneously ensure independent deformation under concentrated force load and the inner cavity and the outer cavity are not deformed and interfered with each other due to the sealing structure and the like are solved.

At present, two types of mature annular cavity sealing modes are adopted, and a static pressure test of a certain engine casing is taken as an example: the structure of the case is shown in fig. 1, the mounting edge A of the case is restrained according to the test load requirement, and mechanical load including axial force, shearing force and bending moment is applied to the mounting edge B; applying a pressure load to the P cavity, wherein the pressure of the Q cavity is standard atmospheric pressure; the detailed carrying schematic diagram is shown in fig. 1. In the existing test implementation scheme, loads such as axial force, shearing force and bending moment are applied in a concentrated force loading mode, pressure load is applied in a mode of injecting hydraulic oil into the casing, and a loading schematic diagram is shown in fig. 1. In the sealing mode of this scheme, realize the seal of pressure through annular chamber urceolus changeover portion, annular chamber inner tube changeover portion and annular plate, wherein annular chamber urceolus changeover portion, annular chamber inner tube changeover portion and annular plate's design makes can not produce additional axial load to the receiver under the pressure load, places O shape sealing washer 1, 2 in annular chamber urceolus changeover portion and annular plate cooperation department simultaneously, places O shape sealing washer 3, 4 in annular chamber inner tube changeover portion and annular plate cooperation department in order to realize the sealing of each cooperation department.

The other sealing mode adopts a floating sealing technology, and as shown in fig. 2, the sealing device comprises 1 first annular plate, 1 second annular plate, 4 pins, a plurality of O-shaped sealing rings and other fasteners. The sealing mode is as follows: the first annular plate is not contacted with the annular cavity inner barrel switching section and is not sealed, and a 4mm gap is reserved between the first annular plate and the annular cavity inner barrel switching section; the first annular plate is connected with the second annular plate through a plurality of uniformly distributed bolts, and the nuts 1 are manually screwed during assembly; gaps between the first annular plate and the annular cavity outer cylinder switching section are sealed through O-shaped sealing rings 1 and 2, gaps between the second annular plate and the annular cavity inner cylinder switching section are sealed through O-shaped sealing rings 3 and 4, gaps between the first annular plate and the second annular plate are sealed through O-shaped sealing rings 15 and 16 (17, 18 and 19), and gaps between the second annular plate and bolts are sealed through O-shaped sealing rings 7 and 8 (9, 10, 11, 12, 13 and 14); all O-ring groove patterns are designed according to the standard.

For the first traditional sealing mode, as the casing bears shear force and bending moment load, transverse displacement exists at the matching position of the annular cavity outer cylinder switching section and the annular plate when the casing is loaded, and as all the matching positions are sealed by the O-shaped sealing ring groove type, the transverse displacement generated by the loading of the casing can compress the O-shaped sealing rings 1, 2, 3 and 4. The magnitude of this lateral displacement and the amount of compression of the O-ring directly affects the load transfer. When the load is large, the elasticity of the O-shaped sealing ring is insufficient to offset the deformation between the inner wall and the outer wall, at the moment, a considerable part of the load on the mounting surface B is transmitted to the inner wall of the annular cavity through the annular plate, so that the load born by the mounting surface B is reduced, the mounting surface A receives the additional load transmitted by the B through the annular plate, the loaded state result of the test piece deviates from the actual working condition, and the authenticity of test assessment is difficult to ensure.

For a floating sealing mode, the tightening torque of 4 screws directly influences the friction force of the upper annular plate and the lower annular plate, so that the friction force is very difficult to control during assembly, and particularly under the action of pressure load, the second annular plate is tightly pressed on the first annular plate, and the normal deformation of the casing is limited by the friction force constraint between the plates. The gaps at the positions of the sealing mode are smaller, the second annular plate and the inner wall of the annular cavity are sealed by adopting a double-layer sealing ring, the bending deformation of the inner wall of the annular cavity is limited, and the sealing mode cannot be applied when the casing bears a load and deforms greatly.

Disclosure of Invention

The invention provides a static pressure comprehensive loading test structure of a casing, which aims to solve the technical problems that the loaded state result of a test piece in the existing sealing mode deviates from the actual working condition, and the authenticity of test assessment is difficult to ensure.

The technical scheme adopted by the invention is as follows:

a static pressure comprehensive loading test structure of a casing comprises: the device comprises a device base with a mounting and supporting function, a casing to be tested fixedly supported on the device base, a bearing cylinder group for bearing acting force of the casing to be tested in the test process, a sealing device and a limiting device; the lower end of the bearing cylinder group is respectively connected with the inner wall and the outer wall of the upper opening ring cavity of the casing to be tested so as to form an inner pressure cavity and an outer pressure cavity which are sleeved with each other and are respectively opened at the upper end; the sealing device is respectively arranged in the internal pressure cavity and the external pressure cavity to seal the openings of the internal pressure cavity and the external pressure cavity respectively and enable the bearing cylinder group and the inner wall and the outer wall of the casing to be tested to deform independently; the limiting device is arranged on the device base and is connected with the sealing device, so that the sealing device is limited in the inner pressure cavity and the outer pressure cavity which are correspondingly arranged.

Further, the device base comprises an installation bottom plate and a supporting cylinder, wherein the installation bottom plate is used for being connected with the test loading device, the supporting cylinder is fixedly arranged on the installation bottom plate in a supporting mode and is annular, the bottom end of the cartridge receiver to be tested is fixedly arranged on the supporting cylinder, and an opening of an opening annular cavity arranged on the supporting cylinder faces upwards; the bearing cylinder group comprises a switching inner cylinder and a switching outer cylinder which are coaxially and internally and externally sleeved; the lower end of the switching inner cylinder is fixed with the top end of the inner annular wall of the opening annular cavity, so that the inner cavity of the switching inner cylinder forms an inner pressure cavity; the lower end of the switching outer cylinder is fixed with the top end of the outer annular wall of the opening annular cavity, so that the annular cavity between the switching outer cylinder and the switching inner cylinder is communicated with the opening annular cavity to form an outer pressure cavity.

Further, the sealing device comprises an inner sealing component and an outer sealing component which play a role in sealing; the inner sealing component is circular and is arranged in the inner pressure cavity and is in sealing connection with the inner cylinder surface of the switching inner cylinder to seal the inner pressure cavity, and the inner sealing component is also connected with the limiting device; the outer sealing component is annular, is sleeved on the outer circle of the switching inner cylinder and is positioned in the outer pressure cavity, and is respectively and hermetically connected with the outer cylinder surface of the switching inner cylinder and the inner cylinder surface of the switching outer cylinder to seal the outer pressure cavity, and is also connected with the limiting device.

Further, the outer sealing assembly comprises an upper annular plate, a lower annular plate, a middle annular plate and a connecting component, wherein the upper annular plate and the lower annular plate are arranged at intervals up and down and are connected with each other; the upper annular plate and the lower annular plate are annular, the inner annular surfaces of the upper annular plate and the lower annular plate are arranged at intervals with the outer annular surface of the switching inner cylinder, and the outer annular surfaces of the upper annular plate and the lower annular plate are in sealing connection with the inner annular surface of the switching outer cylinder through a first sealing group; the inner annular surface of the middle annular plate is in sealing connection with the outer cylindrical surface of the transfer inner cylinder through a second sealing group; the connecting member is disposed between the middle annular plate and the upper and lower annular plates so that the middle annular plate is movably disposed with respect to the upper and lower annular plates.

Further, the upper surface of the lower annular plate is provided with a concave annular lower annular cavity, and the upper surface of the middle annular plate is provided with a concave annular upper annular cavity; the connecting component comprises two layers of steel balls which are respectively arranged in the upper annular cavity and the lower annular cavity, and a retainer which is used for enabling all the steel balls in each layer of steel balls to be uniformly arranged at intervals along the circumferential direction.

Further, the outer sealing assembly further comprises a third sealing group arranged between the middle annular plate and the upper annular plate and between the middle annular plate and the lower annular plate; a radial gap of 5-15 mm is formed between the inner annular surface of the upper annular plate and the inner annular surface of the lower annular plate and the outer cylindrical surface of the transfer inner cylinder; gaps of 1 mm-5 mm are formed between the inner annular surface of the middle annular plate and the outer cylinder surface of the inner transfer cylinder, between the outer annular surfaces of the upper annular plate and the lower annular plate and the inner cylinder surface of the transfer outer cylinder, and between the middle annular plate and the upper annular plate and the lower annular plate.

Further, the inner sealing assembly comprises an inner sealing plate and a fourth sealing group arranged on the outer circle of the inner sealing plate, and the inner sealing plate is in sealing connection with the inner cylinder surface of the switching inner cylinder through the fourth sealing group.

Further, the limiting device comprises an outer limiting component for limiting the action of the outer sealing component and an inner limiting component for limiting the action of the inner sealing component; the outer limiting component is arranged outside the switching outer cylinder in a surrounding manner, the lower end of the outer limiting component is fixedly connected with the device base, and the opposite upper end of the outer limiting component is pressed down to prop against the outer sealing component so as to prevent the outer sealing component from moving upwards under the pressure action in the outer pressure cavity and ensure the free deformation of the switching outer cylinder; the inner limiting component is arranged in the switching inner barrel, the upper end of the inner limiting component is connected with the inner sealing component, and the opposite lower end of the inner limiting component sequentially penetrates through the switching inner barrel and the rear connecting device base of the casing to be tested, so that the inner sealing component is prevented from moving upwards under the action of pressure in the inner pressure cavity, and the free deformation of the switching inner barrel is ensured.

Further, the outer limiting assembly comprises a compression ring for pressing down the outer sealing assembly, a loading plate for loading acting force and a plurality of groups of first pull rod members for connecting and limiting; the compression ring is sleeved outside the switching inner cylinder, and the lower end of the compression ring abuts against the outer sealing assembly; the loading plate is sleeved outside the switching inner cylinder and is positioned above the compression ring, and the upper end of the compression ring is fixedly connected with the loading plate; the plurality of groups of first pull rod members are arranged at intervals along the circumferential direction of the switching outer cylinder, the upper ends of the first pull rod members are movably connected with the loading plate, and the opposite lower ends of the first pull rod members are movably connected with the device base.

Further, the inner limiting component comprises a second pull rod component, the upper end of the second pull rod component is fixedly connected with the inner sealing component, and the opposite lower end of the second pull rod component sequentially penetrates through the switching inner cylinder and the rear movable connecting device base of the casing to be tested.

The invention has the following beneficial effects:

the invention provides a static pressure integrated loading test structure of an engine casing with an annular cavity (an opening annular cavity in the invention) structure and a pressure state, and provides the static pressure integrated loading test structure of the engine casing, wherein the lower end of a bearing cylinder group is respectively connected with the inner wall and the outer wall of the opening annular cavity on the engine casing to be tested, so that an inner pressure cavity and an outer pressure cavity which are arranged in a sleeved mode and are respectively opened at the upper end are formed, and then the inner pressure cavity and the outer pressure cavity are formed in a sealed mode through the installation matching action of a sealing device and the inner pressure cavity and the outer pressure cavity, so that the requirement of applying test pressure in the annular cavity is met; the sealing device can also enable the inner wall and the outer wall of the bearing cylinder group and the casing to be tested to deform independently, namely, the independent deformation of the inner wall and the outer wall of the annular cavity under mechanical load is guaranteed, further, the load borne by the mounting surfaces A, B and C is effectively avoided being transmitted mutually due to the sealing device, the deformation of the inner wall and the outer wall is not interfered mutually, further, the true result of the loaded state of the casing to be tested is guaranteed, the authenticity of test examination is guaranteed, and accordingly, the correct stressed state of the casing to be tested is guaranteed.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of a conventional sealing technique of a casing;

FIG. 2 is a schematic diagram of a floating seal technique for a case;

FIG. 3 is a schematic cross-sectional front view of a static pressure combined loading test structure of a receiver according to a preferred embodiment of the present invention;

FIG. 4 is a schematic view of the partially enlarged structure of FIG. 3;

fig. 5 is a schematic cross-sectional front view of the outer seal assembly of fig. 3.

Description of the drawings

10. A device base; 11. a mounting base plate; 12. a support cylinder; 20. the machine box to be tested; 201. an open annular cavity; 30. a bearing cylinder group; 31. a transfer inner cylinder; 32. a switching outer cylinder; 401. an internal pressure cavity; 402. an outer pressure chamber; 50. an inner seal assembly; 51. an inner sealing plate; 52. a fourth seal group; 60. an outer seal assembly; 61. an upper annular plate; 62. a lower annular plate; 63. an intermediate ring plate; 630. an exhaust hole; 64. a connecting member; 641. a steel ball; 642. a retainer; 65. a first seal group; 66. a second seal group; 67. a third seal group; 70. an outer limit assembly; 71. a compression ring; 72. a loading plate; 73. a first tie member; 731. a first pull rod; 732. a knuckle bearing; 733. a bearing support; 80. and an inner limit component.

Detailed Description

Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.

Referring to fig. 3, a preferred embodiment of the present invention provides a case hydrostatic integrated loading test structure, comprising: the device comprises a device base 10 with a mounting and supporting function, a casing 20 to be tested fixedly supported on the device base 10, a bearing cylinder group 30 for bearing acting force applied to the casing 20 to be tested in the test process, a sealing device and a limiting device. The lower ends of the bearing cylinder groups 30 are respectively connected with the inner wall and the outer wall of the open ring cavity 201 on the casing 20 to be tested so as to form an inner pressure cavity 401 and an outer pressure cavity 402 which are arranged in a sleeved mode and are respectively open at the upper ends. The sealing devices are respectively arranged in the internal pressure cavity 401 and the external pressure cavity 402 to seal the openings of the internal pressure cavity 401 and the external pressure cavity 402 respectively and independently deform the inner wall and the outer wall of the bearing cylinder group 30 and the casing 20 to be tested. The limiting device is arranged on the device base 10 and is connected with the sealing device, so that the sealing device is limited in the corresponding inner pressure cavity 401 and the corresponding outer pressure cavity 402.

The invention provides a static pressure integrated loading test structure of an engine casing with an annular cavity (an opening annular cavity 201 in the invention) structure and a pressure state, and provides the static pressure integrated loading test structure of the engine casing, wherein the lower end of a bearing cylinder group 30 is respectively connected with the inner wall and the outer wall of the opening annular cavity 201 on the engine casing 20 to be tested, so that an inner pressure cavity 401 and an outer pressure cavity 402 which are arranged in a sleeved mode and are respectively opened at the upper end are formed, and then the inner pressure cavity 401 and the outer pressure cavity 402 which are arranged in a sealed mode are formed through the installation matching action of a sealing device and the inner pressure cavity 401 and the outer pressure cavity 402, and the requirement of applying test pressure in the annular cavity is met; the sealing device can also enable the inner wall and the outer wall of the bearing cylinder group 30 and the casing 20 to be tested to deform independently, namely, the independent deformation of the inner wall and the outer wall of the annular cavity under mechanical load is ensured, further, the load borne by the mounting surfaces A, B and C is effectively avoided being transmitted mutually by the sealing device, the deformation of the inner cavity and the outer cavity is not interfered mutually, further, the true result of the loaded state of the casing 20 to be tested is ensured, the authenticity of test assessment is ensured, and further, the correct stressed state of the casing 20 to be tested is ensured; the structure of the invention is successfully applied to a static pressure integrated comprehensive loading fatigue test of a certain engine casing, and contributes to smooth promotion of model development, and the sealing device can be adopted to conveniently solve the interference problem of the inner wall and the outer wall of the sealing of the casing annular cavity, improve the test loading accuracy, shorten the test period and improve the working efficiency, and is popularized and applied to static pressure structural strength test of aeroengine parts.

Optionally, as shown in fig. 3, the device base 10 includes a mounting base plate 11 for connecting with a test loading device, and a supporting cylinder 12 fixedly supported on the mounting base plate 11 and having a ring shape, wherein the bottom end of the casing 20 to be tested is fixedly supported on the supporting cylinder 12, and an opening of an open ring cavity 201 arranged thereon is upward. In the structure of the invention, the device base 10 is simple in structure arrangement and easy to process and prepare, and the casing 20 to be tested is simple to mount and support and easy to dismount. Alternatively, as shown in fig. 3, the bearing cartridge group 30 includes an inner adapter cylinder 31 and an outer adapter cylinder 32 that are coaxially and internally and externally disposed. The lower end of the transfer inner cylinder 31 is fixed with the top end of the inner annular wall of the opening annular cavity 201, so that the inner cavity of the transfer inner cylinder 31 forms an inner pressure cavity 401. The lower end of the switching outer cylinder 32 is fixed with the top end of the outer annular wall of the opening annular cavity 201, so that the annular cavity between the switching outer cylinder 32 and the switching inner cylinder 31 is communicated with the opening annular cavity 201 to form an outer pressure cavity 402. In the structure of the invention, the structure of the bearing cylinder group 30 is simple, the processing and the preparation are easy, the connection mode of the bearing cylinder group 30 and the casing 20 to be tested is simple, and the inner pressure cavity 401 and the outer pressure cavity 402 with the top ends open are easy to form, so that the structure is simple as a whole.

Alternatively, as shown in FIG. 3, the sealing means comprises an inner seal assembly 50 and an outer seal assembly 60 that function as seals. The inner sealing component 50 is circular, is arranged in the inner pressure cavity 401, is in sealing connection with the inner cylinder surface of the switching inner cylinder 31 to seal the inner pressure cavity 401, and is also connected with a limiting device. The outer sealing component 60 is annular, is sleeved on the outer circle of the switching inner cylinder 31 and is positioned in the outer pressure cavity 402, and is respectively and hermetically connected with the outer cylinder surface of the switching inner cylinder 31 and the inner cylinder surface of the switching outer cylinder 32 to seal the outer pressure cavity 402, and the outer sealing component 60 is also connected with a limiting device.

In this alternative, as shown in fig. 4 and 5, the outer seal assembly 60 includes upper and lower annular plates 61 and 62 disposed at an upper and lower interval and connected, an intermediate annular plate 63 movably disposed between the upper and lower annular plates 61 and 62, and a connection member 64 for movably disposing the intermediate annular plate 63. The upper annular plate 61 and the lower annular plate 62 are annular, the inner annular surfaces of the upper annular plate 61 and the lower annular plate 62 are arranged at intervals from the outer annular surface of the switching inner cylinder 31, and the outer annular surfaces of the upper annular plate and the lower annular plate are in sealing connection with the inner annular surface of the switching outer cylinder 32 through a first sealing group 65. The inner annular surface of the middle annular plate 63 is in sealing connection with the outer annular surface of the transfer inner cylinder 31 through a second sealing group 66. The connecting member 64 is provided between the intermediate ring plate 63 and the upper and lower ring plates 61 and 62 so that the intermediate ring plate 63 is movably provided with respect to the upper and lower ring plates 61 and 62. In this alternative, as shown in fig. 5, since the inner annular surfaces of the upper annular plate 61 and the lower annular plate 62 are spaced from the outer annular surface of the switching inner cylinder 31, the outer annular surfaces of the upper annular plate 61 and the lower annular plate 62 are in sealing connection with the inner annular surface of the switching outer cylinder 32 through the first sealing group 65, while the inner annular surface of the middle annular plate 63 is in sealing connection with the outer annular surface of the switching inner cylinder 31 through the second sealing group 66 and is movably arranged relative to the upper annular plate 61 and the lower annular plate 62 through the connecting member 64, the opening of the outer pressure cavity 402 is well sealed, the switching inner cylinder 31 and the switching outer cylinder 32 are mutually independent, deformation of the two is not interfered with each other, and the independent deformation of the inner and outer walls of the casing on two sides of the opening annular cavity 201 is further ensured.

In the specific embodiment of this alternative, as shown in fig. 5, the first sealing group 65 includes a plurality of first sealing rings that are sequentially arranged at intervals along the axial direction, and each first sealing ring is mounted on the outer circles of the upper annular plate 61 and the lower annular plate 62 that are correspondingly arranged; likewise, the second sealing group 66 only includes a second sealing ring, the second sealing ring is mounted on the outer circle of the middle annular plate 63, a single-layer sealing ring sealing form is adopted between the middle annular plate 63 and the transferring inner cylinder 31, the transferring inner cylinder 31 only contacts with the O-ring, and when the transferring inner cylinder 31 is bent and deformed, the middle annular plate 63 cannot generate additional load to the transferring inner cylinder 31.

In this alternative embodiment, as shown in fig. 4, the upper surface of the lower annular plate 62 is provided with a concave annular lower annular cavity, and the upper surface of the middle annular plate 63 is provided with a concave annular upper annular cavity. The connecting member 64 includes two layers of steel balls 641 disposed in the upper and lower annular chambers, respectively, and a holder 642 for uniformly spacing the steel balls of each layer 641 in the circumferential direction. In the structural arrangement of the connecting member 64, the upper annular plate 61, the middle annular plate 63 and the lower annular plate 62 are connected by the steel balls, so that point contact is realized, the surface friction force is small, and when the retainer at the position of the steel balls moves the middle annular plate 63, the steel balls are uniformly distributed along the circumference all the time, and no unbalanced load phenomenon can occur.

In this alternative, the outer seal assembly 60 further includes a third seal set 67 disposed between the intermediate annular plate 63 and the upper and lower annular plates 61, 62. In this alternative embodiment, as shown in fig. 4, the third sealing group 67 includes two third sealing rings, and the two third sealing rings are respectively installed on the lower annular plate 62 and the middle annular plate 63. In the structure of the invention, the double-layer steel ball and the double-layer third sealing ring are both positioned on the middle annular plate 63 and the lower annular plate 62, thereby facilitating the rapid assembly and disassembly of the outer sealing assembly 60.

In this alternative, as shown in fig. 4, a radial gap of 5 mm-15 mm is formed between the inner annular surfaces of the upper annular plate 61 and the lower annular plate 62 and the outer cylindrical surface of the transfer inner cylinder 31, so that the annular plate 63 has enough movement space. As shown in fig. 4, gaps of 1mm to 5mm are provided between the inner annular surface of the intermediate annular plate 63 and the outer cylindrical surface of the inner transfer cylinder, between the outer annular surfaces of both the upper annular plate 61 and the lower annular plate 62 and the inner cylindrical surface of the transfer outer cylinder 32, and between the intermediate annular plate 63 and the upper annular plate 61 and the lower annular plate 62. While ensuring stable sealing of the corresponding positions and independent deformation of the switching inner cylinder 31 and the switching outer cylinder 32, the influence on one of the switching inner cylinder 31 and the switching outer cylinder 32 caused by the outer sealing component 60 when the other is deformed is avoided, and further, the independent deformation of the inner wall and the outer wall of the casing on the two sides of the opening ring cavity 201 is realized.

In this alternative, as shown in fig. 5, the middle ring plate 63 is further provided with a plurality of exhaust holes 630, so that when the oil is injected into the casing 20 to be tested, the air in the outer pressure chamber 402 can be completely exhausted.

Compared with the prior art, the sealing device adopts a three-layer sealing structure design, namely an upper annular plate 61, a lower annular plate 62 and a middle annular plate 63, and the friction force between the layers is reduced by the contact of steel balls; the middle annular plate 63 is clamped between the upper annular plate 61 and the lower annular plate 62, and the gaps are 1 mm-5 mm, so that the transfer inner cylinder 31 and the transfer outer cylinder 32 can be ensured not to interfere when bending deformation occurs, and the application range is enlarged; the upper and lower annular plates 61, 62 are screwed by screws, and can be assembled and disassembled quickly without considering the influence of the screwing torque of the bolts on the friction force between the annular plates.

Alternatively, as shown in fig. 3, the inner sealing assembly 50 includes an inner sealing plate 51, and a fourth sealing group 52 disposed on an outer circle of the inner sealing plate 51, and the inner sealing plate 51 is hermetically connected with the inner cylinder surface of the adapter inner cylinder 31 through the fourth sealing group 52. The inner seal assembly 50 is simple in structural arrangement, easy to process and prepare, and subsequent to disassemble and assemble; in this alternative, the fourth sealing group 52 includes a plurality of fourth sealing rings that are sequentially disposed at intervals along the axial direction, and each fourth sealing ring is disposed on the outer circle of the inner sealing plate 51.

Alternatively, as shown in FIG. 3, the stop means includes an outer stop assembly 70 for stopping the movement of the outer seal assembly 60 and an inner stop assembly 80 for stopping the movement of the inner seal assembly 50. The outer limiting component 70 is disposed around the outer adapting outer cylinder 32, and its lower end is fixedly connected with the device base 10, and its opposite upper end presses down against the outer sealing component 60, so as to prevent the outer sealing component 60 from moving upwards under the pressure action of the outer pressure cavity 402, and to ensure the free deformation of the adapting outer cylinder 32. The inner limiting component 80 is installed in the switching inner cylinder 31, the upper end of the inner limiting component 80 is connected with the inner sealing component 50, and the opposite lower end of the inner limiting component is sequentially penetrated through the switching inner cylinder 31 and the rear connecting device base 10 of the casing 20 to be tested, so as to prevent the inner sealing component 50 from moving upwards under the pressure action of the inner pressure cavity 401 and ensure the free deformation of the switching inner cylinder 31.

In this alternative, as shown in fig. 3, the outer limit assembly 70 includes a compression ring 71 for depressing the outer seal assembly 60, a loading plate 72 for loading the applied force, and a plurality of sets of first pull rod members 73 for connection limiting. The compression ring 71 is sleeved outside the switching inner cylinder 31, and the lower end of the compression ring abuts against the outer sealing assembly 60. The loading plate 72 is sleeved outside the switching inner cylinder 31 and is positioned above the pressure ring 71, and the upper end of the pressure ring 71 is fixedly connected with the loading plate 72. The plurality of groups of first pull rod members 73 are arranged at intervals along the circumferential direction of the switching outer cylinder 32, and the upper end of each first pull rod member 73 is movably connected with the loading plate 72, and the opposite lower end is movably connected with the device base 10. In operation, the load plate 72 is forced, thereby forcing the compression ring 71 against the hold down outer seal assembly 60.

In the embodiment of this alternative, as shown in fig. 3, the first drawbar member 73 includes a first drawbar 731, knuckle bearings 732 connected to both ends of the first drawbar 731, and a bearing support 733 for mounting one of the knuckle bearings 732. The first pull rod 731 is vertically disposed, the knuckle bearing 732 at the upper end thereof is connected to the loading plate 72, the opposite lower knuckle bearing 732 is disposed on the bearing support 733, and the bearing support 733 is fixedly connected to the device base 10. In this embodiment, the additional axial force generated by the pressure of the whole device is transmitted to the device base 10 through the connection between the compression ring 71 and the plurality of groups of first pull rod members 73, and the joint bearings 732 arranged at the upper and lower ends of the first pull rod 731 are connected in a two-position hinge manner, so that the whole sealing device can move freely in the transverse direction.

In this alternative, as shown in fig. 3, the inner limiting component 80 includes a second pull rod member, the upper end of the second pull rod member is fixedly connected with the inner sealing component 50, and the opposite lower end of the second pull rod member sequentially penetrates through the inner adapting cylinder 31 and the base 10 of the movable connecting device behind the casing 20 to be tested. In a specific embodiment of this alternative, as shown in fig. 3, the second pull rod member includes a second pull rod that is vertically disposed, a lock nut that is disposed on an outer circle of an upper end of the second pull rod, a knuckle bearing that is connected to a bottom end of the second pull rod, and a bearing support for mounting the knuckle bearing. The upper end of the second pull rod is threaded with a lock nut after penetrating through the inner sealing assembly 50; the bearing support is fixedly connected to the device base 10, which structure is provided, likewise for ensuring that the entire sealing device is freely movable in the transverse direction.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a quick-witted casket static pressure integrated loading test structure which characterized in that includes:

the device comprises a device base (10) with a mounting and supporting function, a casing to be tested (20) fixedly supported on the device base (10), a bearing cylinder group (30) for bearing acting force applied to the casing to be tested (20) in the test process, a sealing device and a limiting device;

the lower end of the bearing cylinder group (30) is respectively connected with the inner wall and the outer wall of an annular cavity (201) of an upper opening of the casing (20) to be tested so as to form an inner pressure cavity (401) and an outer pressure cavity (402) which are arranged in a sleeved mode and are respectively opened at the upper end;

the sealing devices are respectively arranged in the internal pressure cavity (401) and the external pressure cavity (402) to respectively seal the openings of the internal pressure cavity (401) and the external pressure cavity (402) and independently deform the inner wall and the outer wall of the bearing cylinder group (30) and the casing (20) to be tested;

the limiting device is arranged on the device base (10) and is connected with the sealing device, so that the sealing device is limited in the inner pressure cavity (401) and the outer pressure cavity (402) which are correspondingly arranged.

2. The case static pressure comprehensive loading test structure according to claim 1, wherein,

the device base (10) comprises an installation bottom plate (11) used for being connected with the test loading device, and a support cylinder (12) fixedly supported on the installation bottom plate (11) and in a ring shape, wherein the bottom end of the casing (20) to be tested is fixedly supported on the support cylinder (12), and an opening of an opening ring cavity (201) arranged on the casing is upward;

the bearing cylinder group (30) comprises a switching inner cylinder (31) and a switching outer cylinder (32) which are coaxially and internally and externally sleeved;

the lower end of the switching inner cylinder (31) is fixed with the top end of the inner annular wall of the opening annular cavity (201) so that the inner cavity of the switching inner cylinder (31) forms an inner pressure cavity (401);

the lower end of the switching outer cylinder (32) is fixed with the top end of the outer annular wall of the opening annular cavity (201) so that the annular cavity between the switching outer cylinder (32) and the switching inner cylinder (31) is communicated with the opening annular cavity (201) to form an outer pressure cavity (402).

3. The case static pressure comprehensive loading test structure according to claim 2, wherein,

the sealing device comprises an inner sealing assembly (50) and an outer sealing assembly (60) which play a sealing role;

the inner sealing component (50) is circular, is arranged in the inner pressure cavity (401), is in sealing connection with the inner cylinder surface of the switching inner cylinder (31) to seal the inner pressure cavity (401), and is also connected with the limiting device;

the outer sealing component (60) is annular, is sleeved on the outer circle of the switching inner cylinder (31) and is positioned in the outer pressure cavity (402), is respectively and hermetically connected with the outer cylinder surface of the switching inner cylinder (31) and the inner cylinder surface of the switching outer cylinder (32) to seal the outer pressure cavity (402), and the outer sealing component (60) is also connected with the limiting device.

4. The case static pressure comprehensive loading test structure according to claim 3, wherein,

the outer sealing assembly (60) comprises an upper annular plate (61) and a lower annular plate (62) which are arranged at intervals up and down and are connected, an intermediate annular plate (63) which is movably arranged between the upper annular plate (61) and the lower annular plate (62), and a connecting member (64) which is used for movably arranging the intermediate annular plate (63);

the upper annular plate (61) and the lower annular plate (62) are annular, the inner annular surfaces of the upper annular plate and the lower annular plate are arranged at intervals with the outer annular surface of the switching inner cylinder (31), and the outer annular surfaces of the upper annular plate and the lower annular plate are in sealing connection with the inner annular surface of the switching outer cylinder (32) through a first sealing group (65);

the inner annular surface of the middle annular plate (63) is in sealing connection with the outer annular surface of the switching inner cylinder (31) through a second sealing group (66);

the connecting member (64) is disposed between the intermediate ring plate (63) and the upper and lower ring plates (61, 62) such that the intermediate ring plate (63) is movably disposed with respect to the upper and lower ring plates (61, 62).

5. The case static pressure comprehensive loading test structure according to claim 4, wherein,

the upper surface of the lower annular plate (62) is provided with a concave annular lower annular cavity, and the upper surface of the middle annular plate (63) is provided with a concave annular upper annular cavity;

the connecting member (64) comprises two layers of steel balls which are respectively arranged in the upper annular cavity and the lower annular cavity, and a retainer which is used for enabling all the steel balls in each layer to be uniformly arranged at intervals along the circumferential direction.

6. The case static pressure comprehensive loading test structure according to claim 4, wherein,

the outer sealing assembly (60) further comprises a third sealing group (67) arranged between the middle annular plate (63) and the upper annular plate (61) and the lower annular plate (62);

a radial gap of 5-15 mm is formed between the inner annular surface of the upper annular plate (61) and the inner annular surface of the lower annular plate (62) and the outer annular surface of the switching inner cylinder (31);

gaps of 1 mm-5 mm are respectively arranged between the inner annular surface of the middle annular plate (63) and the outer cylindrical surface of the inner rotary joint cylinder, between the outer annular surfaces of the upper annular plate (61) and the lower annular plate (62) and the inner cylindrical surface of the rotary joint outer cylinder (32), and between the middle annular plate (63) and the upper annular plate (61) and the lower annular plate (62).

7. The case static pressure comprehensive loading test structure according to claim 3, wherein,

the inner sealing assembly (50) comprises an inner sealing plate (51) and a fourth sealing group (52) arranged on the outer circle of the inner sealing plate (51), and the inner sealing plate (51) is in sealing connection with the inner cylinder surface of the switching inner cylinder (31) through the fourth sealing group (52).

8. The case static pressure comprehensive loading test structure according to claim 3, wherein,

the limiting device comprises an outer limiting assembly (70) for limiting the action of the outer sealing assembly (60) and an inner limiting assembly (80) for limiting the action of the inner sealing assembly (50);

the outer limiting component (70) is arranged outside the switching outer cylinder (32) in a surrounding manner, the lower end of the outer limiting component is fixedly connected with the device base (10), and the opposite upper end of the outer limiting component is pressed down against the outer sealing component (60) so as to prevent the outer sealing component (60) from moving upwards under the action of pressure in the outer pressure cavity (402) and ensure the free deformation of the switching outer cylinder (32);

the inner limiting component (80) is arranged in the switching inner cylinder (31), the upper end of the inner limiting component (80) is connected with the inner sealing component (50), and the opposite lower end of the inner limiting component is sequentially penetrated through the switching inner cylinder (31) and the rear connecting device base (10) of the casing (20) to be tested, so that the inner sealing component (50) is prevented from moving upwards under the pressure action in the inner pressure cavity (401), and the free deformation of the switching inner cylinder (31) is ensured.

9. The case static pressure comprehensive loading test structure according to claim 8, wherein,

the outer limiting assembly (70) comprises a compression ring (71) for pressing down the outer sealing assembly (60), a loading plate (72) for loading acting force, and a plurality of groups of first pull rod members (73) for connecting and limiting;

the compression ring (71) is sleeved outside the switching inner cylinder (31), and the lower end of the compression ring abuts against the outer sealing assembly (60);

the loading plate (72) is sleeved outside the switching inner cylinder (31) and is positioned above the compression ring (71), and the upper end of the compression ring (71) is fixedly connected with the loading plate (72);

the plurality of groups of first pull rod members (73) are arranged at intervals along the circumferential direction of the switching outer cylinder (32), the upper ends of the first pull rod members (73) are movably connected with the loading plate (72), and the opposite lower ends of the first pull rod members are movably connected with the device base (10).

10. The case static pressure comprehensive loading test structure according to claim 8, wherein,

the inner limiting component (80) comprises a second pull rod component, the upper end of the second pull rod component is fixedly connected with the inner sealing component (50), and the opposite lower end of the second pull rod component sequentially penetrates through the switching inner cylinder (31) and the rear movable connecting device base (10) of the casing to be tested (20).

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