Extension shaft mechanism of temperature control inertial navigation test turntable

Abstract

The invention discloses an extension shaft mechanism of a temperature control inertial navigation test rotary table, and relates to the technical field of inertial navigation test rotary tables. The heating assembly is fixed in the base assembly; the heat insulation gasket is arranged above the base assembly; the extension shaft assembly is arranged on the heat insulation gasket, and the extension shaft assembly and the heat insulation gasket are connected with the base assembly through screws; the rotary table device is rotationally arranged at the top of the extension shaft assembly; the internal water removal device is arranged in the extension shaft assembly, and the bottom of the internal water removal device is connected with the base assembly. Through thermal inertia compensation, multiple layers of sealing barriers and an active water removal mechanism, generation of condensate water is effectively restrained, thermal stress deformation is avoided, and the precision and reliability of the rotary table in an extreme temperature change environment are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of inertial navigation test turntables, and more particularly to an extension shaft mechanism of a temperature-controlled inertial navigation test turntable. Background Art

[0002] The single-axis temperature-controlled turntable adds a temperature control function to the traditional inertial navigation test turntable, which enables it to accurately control the working environment temperature of the object under test, significantly expanding the application range of the traditional turntable. Conventional single-axis temperature-controlled turntables will produce certain thermal deformations that affect the accuracy of the turntable when running for a long time or when the temperature changes. The thermal deformation mainly comes from two aspects. On the one hand, it is the heat generated by the motor and bearings during operation; on the other hand, the temperature change causes the overall temperature distribution of the turntable to be uneven. These two factors will cause the turntable material to expand or contract thermally, and then deform, thereby affecting the accuracy and stability of the turntable, accelerating material fatigue aging, and shortening the service life of the turntable. When the temperature box is switched between high and low temperatures, condensation water will be generated on the inner and outer walls of the extension shaft, and the condensation water will flow along the extension shaft to the inside of the table body, thereby affecting the reliability and service life of the turntable. Therefore, it is necessary to provide an extension shaft mechanism for a temperature-controlled inertial navigation test turntable to solve the problems raised in the above background technology. Summary of the Invention

[0003] To achieve the above-mentioned object, the present invention provides the following technical solution: an extension axis mechanism of a temperature-controlled inertial navigation test turntable, comprising:

[0004] Base assembly;

[0005] A heating assembly is fixed in the base assembly;

[0006] a thermal insulation gasket, arranged above the base assembly;

[0007] An extension shaft assembly is provided on the thermal insulation gasket, and the extension shaft assembly and the thermal insulation gasket are connected to the base assembly via screws;

[0008] a turntable device rotatably disposed on top of the extension shaft assembly;

[0009] The internal water removal device is arranged in the extension shaft assembly, and the bottom is connected to the base assembly.

[0010] Furthermore, as a preference, the base assembly is provided with a heat-insulating seat, a sealing ring and a water retaining plate are provided below the heat-insulating seat, the water retaining plate is connected to the heat-insulating seat by screws, and the sealing ring is provided at the connection between the water retaining plate and the heat-insulating seat.

[0011] Furthermore, preferably, the heating component includes:

[0012] The heating belt clamp is fixed to the inner side of the thermal insulation seat by screws;

[0013] A heating belt is fixed to the heating belt fixture and connected to the extension shaft assembly;

[0014] The temperature sensor is fixed to the insulation seat with high-temperature tape.

[0015] Furthermore, preferably, the extension shaft assembly includes

[0016] Fix the connecting piece to the heat insulation seat with screws;

[0017] Double-layer shaft, the bottom outer side is slidably arranged on the inner side of the fixed connection piece;

[0018] The fixed protrusion is annular and is arranged on the top of the thermal insulation gasket, corresponding to the interlayer of the double-layer shaft body;

[0019] A soft sealing layer is provided at the connection between the fixed protrusion and the double-layer shaft body;

[0020] The heating ring network is arranged between the double-layer shaft bodies and is connected to the heating assembly through the inner connecting channel between the fixed protrusion and the double-layer shaft bodies;

[0021] The sealing assembly is fixed on the top of the double-layer shaft body and connected to the turntable device.

[0022] Furthermore, preferably, the sealing assembly is provided with a sealing plate and a sealing gasket, and the sealing gasket and the sealing plate are connected to the double-layer shaft body by screws.

[0023] Furthermore, as a preference, the turntable device is provided with a table top, and a table top socket label, a cable support block and a power strip are provided between the lower ends of the table top and the extension shaft assembly. The cable support block is connected to the table top socket label and the power strip by screws, and the power strip is arranged on the outside of the extension shaft assembly, and the table top socket label is connected to the table top by screws.

[0024] Further, as a preference, the internal water removal device comprises:

[0025] A pressurizing assembly is slidably disposed inside the extension shaft assembly, and its bottom portion passes through the base assembly and is connected to an external pressure pump;

[0026] The drainage assembly has a bottom fixedly connected to the base assembly, is arranged on the outside of the pressurizing assembly, and has a top slidably connected to the extension shaft assembly.

[0027] Furthermore, preferably, the pressurizing component includes:

[0028] a piston face slidably disposed within the extension shaft assembly;

[0029] One end of the pressurizing tube passes through the center of the base assembly and is connected to the external pressure pump, and the other end passes through the piston surface and is slidably connected to the piston surface.

[0030] Furthermore, preferably, the drainage component includes:

[0031] a drain pipe fixed to the center of the base assembly and arranged outside the pressurized pipe;

[0032] The water collecting arc surface has a bottom fixedly connected to the drain pipe and a top slidably connected to the inner wall of the extension shaft assembly.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] In the present invention, by setting up a heating component and an extension shaft component, the influence of the ambient temperature change on the extension shaft is compensated according to the temperature change in the temperature chamber, and a heating ring network is set in the double-layer shaft body to timely and comprehensively control the temperature of the extension shaft, effectively solving the thermal deformation of the table body during the hot and cold changes in the temperature chamber, and improving the accuracy, stability and service life of the turntable; by regulating the temperature of the extension shaft by the heating belt, the problem of condensation water generated on the inner and outer walls of the extension shaft during the temperature change from high temperature to low temperature in the temperature chamber is effectively solved, thereby improving the service life of the turntable, and for the condensation water formed by some air entering the extension shaft, an internal dewatering device is set to discharge the condensation water in time, effectively reducing the influence of the condensation water on the table body, and a water retaining plate is set under the heat insulation seat, and the water retaining plate is designed with an annular groove for installing a sealing ring, thereby achieving a stronger waterproof effect; through thermal inertia compensation, multi-layer sealing barriers and active dewatering mechanism, the generation of condensation water is effectively suppressed, thermal stress deformation is avoided, and the accuracy and reliability of the turntable in extreme temperature change environments are guaranteed. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the overall structure of an extension axis mechanism of a temperature-controlled inertial navigation test turntable;

[0036] Figure 2 It is a schematic diagram of the base assembly and the heating assembly structure;

[0037] Figure 3 Schematic diagram of the extension shaft assembly structure;

[0038] Figure 4 It is a schematic diagram of the double-sided shaft structure;

[0039] Figure 5 It is a schematic diagram of the structure of the turntable device and the internal water removal device;

[0040] Figure 6 It is a schematic diagram of the structure of the pressurizing component and the drainage component;

[0041] In the figure: 1. Base assembly; 2. Heating assembly; 3. Insulation gasket; 4. Extension shaft assembly; 5. Turntable device; 6. Internal water removal device; 11. Insulation seat; 12. Water retaining plate; 13. Sealing ring; 21. Heating belt clamp; 22. Heating belt; 23. Temperature sensor; 41. Fixed connector; 42. Double-layer shaft; 43. Fixed protrusion; 44. Soft sealing layer; 45. Heating ring network; 46. Sealing assembly; 51. Countertop; 52. Countertop socket label; 53. Cable support block; 54. Extension board; 61. Pressurization assembly; 62. Drainage assembly; 461. Sealing plate; 462. Sealing gasket; 611. Piston surface; 612. Pressurization pipe; 621. Drainage pipe; 622. Water collection arc surface. DETAILED DESCRIPTION

[0042] See also Figures 1 to 6 In an embodiment of the present invention, an extension axis mechanism of a temperature-controlled inertial navigation test turntable includes:

[0043] Base assembly 1;

[0044] The heating component 2 is fixed in the base component 1;

[0045] A thermal insulation gasket 3 is provided above the base assembly 1;

[0046] The extension shaft assembly 4 is arranged on the thermal insulation gasket 3, and the extension shaft assembly 4 and the thermal insulation gasket 3 are connected to the base assembly 1 by screws;

[0047] A turntable device 5 is rotatably disposed on the top of the extension shaft assembly 4;

[0048] The internal water removal device 6 is disposed in the extension shaft assembly 4 , and the bottom thereof is connected to the base assembly 1 .

[0049] In this embodiment, the base assembly 1 is provided with an insulation seat 11, and a sealing ring 13 and a water retaining plate 12 are provided below the insulation seat 11. The water retaining plate 12 is connected to the insulation seat 11 by screws, and the sealing ring 13 is provided at the connection between the water retaining plate 12 and the insulation seat 11.

[0050] It is also worth mentioning that the water retaining plate 12 is set as an inclined annular structure, which is tightly connected to the insulation seat 11 through the sealing ring 13. When the temperature change in the temperature box causes condensation water to be generated on the surface of the extension shaft assembly 4, the water retaining plate 12 guides the condensation water to the outside through its inclined surface, preventing the water from entering the interior of the turntable, thereby improving the service life of the turntable.

[0051] In this embodiment, the heating component 2 includes:

[0052] The heating belt clamp 21 is fixed to the inner side of the thermal insulation seat 11 by screws;

[0053] The heating belt 22 is fixed on the heating belt fixture 21 and connected to the extension shaft assembly 4;

[0054] The temperature sensor 23 is fixed on the heat-insulating seat 11 by means of a high-temperature adhesive tape.

[0055] That is to say, under the action of the temperature sensor 23, the temperature of the extension shaft assembly 4 is monitored in real time, and the temperature sensor 23 feeds back the temperature data to the control system to form a closed-loop control loop, and then the extension shaft assembly 4 is directly heated by the heating belt 22. The heating belt clamp 21 ensures that the heating belt 22 is in close contact with the extension shaft to achieve efficient heat conduction, and through the setting of the thermal insulation seat 11 and the thermal insulation gasket 3, a thermal resistance barrier is formed to reduce the impact of external environmental temperature fluctuations on the extension shaft assembly 4, thereby ensuring the temperature stability of the extension shaft assembly 4.

[0056] In this embodiment, the extension shaft assembly 4 includes

[0057] The fixed connecting member 41 is fixed to the heat insulating seat 11 by screws;

[0058] A double-layer shaft 42, with the bottom outer side slidably arranged on the inner side of the fixed connecting member 41;

[0059] The fixed protrusion 43 is annular and is arranged on the top of the thermal insulation gasket 3, corresponding to the interlayer of the double-layer shaft body 42;

[0060] A soft sealing layer 44 is provided at the connection between the fixed protrusion 43 and the double-layer shaft body 42;

[0061] The heating ring network 45 is arranged between the double-layer shaft bodies 42 and is connected to the heating assembly 2 through the inner connecting channel between the fixed protrusion 43 and the double-layer shaft bodies 42;

[0062] The sealing assembly 46 is fixed on the top of the double-layer shaft body 42 and connected to the turntable device 5.

[0063] That is to say, under the action of the heating belt 22, the double-layer shaft body 42 is heated in all directions through the heating ring network 45 to compensate for the impact of ambient temperature changes on the double-layer shaft body 42, to avoid the double-layer shaft body 42 from generating thermal stress due to uneven temperature, causing the turntable to deform and affecting the turntable accuracy, and under the action of the turntable's own gravity, the double-layer shaft body 42 slides down on the inner side of the fixed connection 41 and fits with the fixed protrusion 43, squeezing and fixing the soft sealing layer 44, so that the connection between the heating belt 22 and the heating ring network 45 and the double-layer shaft body 42 and the fixed protrusion 43 are in a sealed state, effectively preventing external air from entering the interior of the double-layer shaft body 42, and generating condensed water as the temperature changes, causing damage to the turntable and affecting the service life of the turntable.

[0064] As a preferred embodiment, when the temperature box is cooled, when the temperature box starts to cool down at a slower rate, the temperature drop of the double-layer shaft 42 will lag behind, and it can gradually reach equilibrium with the ambient temperature through natural heat dissipation. At this time, the heating belt 22 suspends heating or operates at extremely low power to avoid the temperature of the double-layer shaft 42 being too high, while reducing energy consumption, and the temperature sensor 23 continuously monitors the temperature gradient of the double-layer shaft 42 to prevent deformation caused by thermal stress; if the temperature box cooling rate is too fast, the double-layer shaft 42 may not be able to dissipate heat in time due to the thermal inertia of the material, causing its temperature drop to lag behind the ambient temperature. At this time, the heating belt 22 automatically increases the heating power and actively heats the double-layer shaft 42 to compensate for the heat loss caused by the rapid drop in ambient temperature, and maintain the temperature of the double-layer shaft 42 at the set value. (such as 25°C) to ensure that the temperature gradient is controlled within a safe range to prevent condensation. When the temperature box is heated, when the temperature box switches from low temperature to high temperature, the ambient temperature will rise rapidly. Due to thermal inertia, the temperature rise of the double-layer shaft 42 may lag behind the ambient temperature. At this time, the heating belt 22 actively heats the double-layer shaft 42 to quickly keep up with the ambient temperature changes to avoid excessive temperature gradients. When the temperature of the double-layer shaft 42 approaches the set value, the heating belt 22 reduces the heating power or suspends heating. The extension shaft relies on natural heat absorption to steadily increase the temperature to prevent temperature fluctuations. The temperature sensor 23 continuously monitors the temperature of the double-layer shaft 42 to ensure that it is stable near the set value to avoid overheating or overcooling, and to prevent the double-layer shaft 42 from generating thermal stress due to excessive temperature gradients, leading to deformation or damage.

[0065] In this embodiment, the sealing assembly 46 includes a sealing plate 461 and a sealing gasket 462 , and the sealing gasket 462 and the sealing plate 461 are connected to the double-layer shaft 42 via screws.

[0066] That is to say, the double-layer shaft body 42 is axially sealed by the sealing gasket 462, and the double-layer shaft body 42 is end-face sealed by the sealing plate 461, which effectively prevents humid air from penetrating and generating condensation water inside the double-layer shaft body 42, affecting the reliability and service life of the turntable.

[0067] In this embodiment, the turntable device 5 is provided with a table top 51, and a table top socket identifier 52, a cable support block 53 and a power strip 54 are provided between the lower ends of the table top 51 and the extension shaft assembly 4. The cable support block 53 is connected to the table top socket identifier 52 and the power strip 54 by screws. The power strip 54 is arranged on the outside of the extension shaft assembly 4, and the table top socket identifier 52 is connected to the table top 51 by screws.

[0068] That is to say, under the action of the cable support block 53, the cable is fastened between the extension board 54 and the table 51 to prevent the cable from being displaced due to the movement of the equipment, ensuring the stability of the connection, and the extension board 54 provides a fixed path for the cables at both ends below the table 51 to prevent the cables from being entangled, twisted or falling off when the equipment moves, and the position indication and safety specification warning are provided through the table socket mark 52.

[0069] In this embodiment, the internal water removal device 6 includes:

[0070] The pressurizing assembly 61 is slidably disposed inside the extension shaft assembly 4, and its bottom passes through the base assembly 1 and is connected to an external pressure pump;

[0071] The drainage assembly 62 is fixedly connected to the base assembly 1 at the bottom, is arranged on the outside of the pressurizing assembly 61, and is slidably connected to the extension shaft assembly 4 at the top.

[0072] In this embodiment, the pressurizing component 61 includes:

[0073] The piston surface 611 is slidably disposed inside the extension shaft assembly 4;

[0074] One end of the pressure tube 612 passes through the center of the base assembly 1 and is connected to the external pressure pump, and the other end passes through the piston surface 611 and is slidably connected to the piston surface 611.

[0075] In this embodiment, the drainage assembly 62 includes:

[0076] The drain pipe 621 is fixed at the center of the base assembly 1 and is arranged outside the pressurized pipe 612;

[0077] The water collecting arc surface 622 is fixedly connected to the drain pipe 621 at the bottom and slidably connected to the inner wall of the extension shaft assembly 4 at the top.

[0078] That is to say, when the turntable is slightly deformed by the temperature, the external air enters the double-layer shaft body 42 through the connection gaps of the various parts of the turntable. During the temperature change of the incubator, condensed water is generated inside the double-layer shaft body 42. It should be noted that this is an extreme case. At this time, an external pressure pump can be used to inject pressurized gas into the space between the piston surface 611 and the sealing component 46 through the pressure pipe 612 to push the piston surface 611 downward, and transfer the condensed water on the inner wall of the double-layer shaft body 42 to the water collection arc surface 622, and then drain it through the drainage pipe. 621 is discharged. After the condensed water is discharged, the pressurized air is discharged by an external pressure pump through the pressure pipe 612, so that the piston surface 611 is reset in the double-layer shaft body 42, and a one-way valve is provided at the drain pipe 621 to effectively prevent external air from entering. In addition, the water collecting arc surface 622 is slidably connected to the inner wall of the double-layer shaft body 42, which can collect the condensed water on the inner wall while not hindering the double-layer shaft body 42 from moving downward to squeeze the soft sealing layer 44, thereby sealing the channel between the double-layer shaft body 42 and the fixed protrusion 43.

[0079] In specific implementation, the base assembly 1 serves as the basic supporting structure, and the bottom of its heat insulation seat 11 is tightly connected with the water retaining plate 12 through the sealing ring 13. The inclined annular structure of the water retaining plate 12 can effectively guide the condensed water to the outside. The heat insulation gasket 3 is placed above the base assembly 1, and the extension shaft assembly 4 is fixed thereto by screws. The bottom of the double-layer shaft body 42 slides and nests in the fixed connecting member 41, and the top is sealed in the axial direction and the end face by the sealing plate 461 and the sealing gasket 462 of the sealing assembly 46 to prevent humid air from penetrating. The heating belt clamp 21 of the heating assembly 2 fastens the heating belt 22 to the inner side of the heat insulation seat 11, and the temperature sensor 23 is attached to the heat insulation seat 11 through high-temperature tape, monitors the extension shaft temperature in real time and feeds back to the control system to form a closed-loop control circuit. When the temperature of the incubator changes, if the cooling rate is too fast, the heating belt 22 actively transfers heat to the double-layer shaft body 42 through the heating ring network 45 to compensate for the heat loss caused by the rapid drop in ambient temperature and maintain the temperature of the double-layer shaft body 42 at the set value (such as 2 5℃); when the temperature rises, it actively heats to shorten the temperature lag time. When the temperature of the double-layer shaft body 42 approaches the set value, the heating belt 22 reduces the power or stops heating, relying on natural heat absorption to achieve a smooth transition. When condensed water is generated inside the extension shaft assembly 4, the pressurizing assembly 61 of the internal water removal device 6 drives the piston surface 611 to move downward along the pressurizing pipe 612 through the external pressure pump, and pressurizes the condensed water on the inner wall of the double-layer shaft body 42 to the water collecting arc surface 622, and is discharged through the drain pipe 621. After the condensed water is discharged An external pressure pump discharges pressurized air through the pressure pipe 612, causing the piston surface 611 to reset inside the double-layer shaft body 42. A one-way valve is built into the drain pipe 621 to prevent backflow of external air. The water-collecting arc surface 622 is slidably connected to the inner wall of the double-layer shaft body 42 to ensure that the drainage function is compatible with the thermal expansion and contraction of the shaft body. The entire system effectively suppresses the generation of condensation water and avoids thermal stress deformation through thermal inertia compensation, multi-layer sealing barriers and active water removal mechanisms, thereby ensuring the accuracy and reliability of the turntable in extreme temperature changes.

[0080] The above is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An extension axis mechanism for a temperature-controlled inertial navigation test turntable, characterized by: include: Base assembly (1); A heating assembly (2) is fixed in the base assembly (1); A heat-insulating gasket (3) is arranged above the base assembly (1); An extension shaft assembly (4) is arranged on the thermal insulation gasket (3), and the extension shaft assembly (4) and the thermal insulation gasket (3) are connected to the base assembly (1) via screws; A turntable device (5) is rotatably mounted on top of the extension shaft assembly (4); The internal water removal device (6) is arranged in the extension shaft assembly (4), and the bottom is connected to the base assembly (1).

2. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 1, characterized in that: The base assembly (1) is provided with a heat-insulating seat (11), a sealing ring (13) and a water retaining plate (12) are provided below the heat-insulating seat (11), the water retaining plate (12) is connected to the heat-insulating seat (11) via screws, and the sealing ring (13) is provided at the connection between the water retaining plate (12) and the heat-insulating seat (11).

3. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 1, characterized in that: The heating component (2) comprises: A heating belt fixture (21) is fixed to the inner side of the heat insulation seat (11) by screws; A heating belt (22) is fixed to the heating belt fixture (21) and connected to the extension shaft assembly (4); The temperature sensor (23) is fixed on the heat-insulating seat (11) by means of a high-temperature adhesive tape.

4. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 2, characterized in that: The extension shaft assembly (4) includes A fixed connecting member (41) is fixed to the heat insulating seat (11) by screws; A double-layer shaft body (42), the bottom outer side of which is slidably arranged on the inner side of the fixed connecting member (41); A fixed protrusion (43) is annular and is arranged on the top of the thermal insulation gasket (3) and corresponds to the interlayer of the double-layer shaft body (42); A soft sealing layer (44) is provided at the connection between the fixed protrusion (43) and the double-layer shaft body (42); A heating ring network (45) is arranged between the double-layer shaft bodies (42) and is connected to the heating assembly (2) via an inner connecting channel between the fixed protrusion (43) and the double-layer shaft bodies (42); The sealing assembly (46) is fixed on the top of the double-layer shaft (42) and connected to the turntable device (5).

5. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 4, characterized in that: The sealing assembly (46) is provided with a sealing plate (461) and a sealing gasket (462), and the sealing gasket (462) and the sealing plate (461) are connected to the double-layer shaft (42) via screws.

6. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 1, characterized in that: The turntable device (5) is provided with a table top (51), and a table top socket mark (52), a cable support block (53) and a cable strip (54) are provided between the lower ends of the table top (51) and the extension shaft assembly (4). The cable support block (53) is connected to the table top socket mark (52) and the cable strip (54) by screws. The cable strip (54) is provided on the outside of the extension shaft assembly (4), and the table top socket mark (52) is connected to the table top (51) by screws.

7. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 1, characterized in that: The internal water removal device (6) comprises: A pressurizing assembly (61) is slidably disposed inside the extension shaft assembly (4), and its bottom portion passes through the base assembly (1) and is connected to an external pressure pump; The drainage assembly (62) has a bottom fixedly connected to the base assembly (1), is arranged outside the pressurizing assembly (61), and has a top slidably connected to the extension shaft assembly (4).

8. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 7, characterized in that: The pressurizing component (61) comprises: A piston surface (611) is slidably disposed inside the extension shaft assembly (4); The pressurizing tube (612) has one end passing through the center of the base assembly (1) and connected to the external pressure pump, and the other end passing through the piston surface (611) and slidably connected to the piston surface (611).

9. The extension axis mechanism of the temperature-controlled inertial navigation test turntable according to claim 8, characterized in that: The drainage assembly (62) includes: A drainage pipe (621) is fixed at the center of the base assembly (1) and is arranged outside the pressure pipe (612); The water collecting arc surface (622) has a bottom fixedly connected to the drainage pipe (621) and a top slidably connected to the inner wall of the extension shaft assembly (4).

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