阅读说明：本技术 基于全胶圈密封结构的液浮陀螺仪试装装置 (Liquid floating gyroscope trial assembly device based on full rubber ring sealing structure ) 是由 张路 周镐京 东永红 王玉琢 张力 郭伟 吴亦威 罗霄 于 2021-05-24 设计创作，主要内容包括：本发明涉及基于全胶圈密封结构的液浮陀螺仪试装装置,以解决现有的使用整套正式陀螺仪零组件实现浮子静平衡的方法,需通过胶接、焊封方式组装,费时费力,扣胶分解拆卸可能报废部分零组件的问题。该装置包括壳体、设置在壳体一端的波纹管组件、用于将波纹管组件压紧在壳体上且与壳体螺纹连接的波纹管压环、设置在壳体另一端的端盖组件、用于将端盖组件压紧在壳体上且与壳体螺纹连接的端盖压环。壳体一端端面与波纹管组件之间设置有第一O型密封胶圈,壳体另一端端面与端盖组件之间设置有第二O型密封胶圈。波纹管组件外侧设置有波纹管充油嘴,端盖组件外侧设置有端盖充油嘴,波纹管充油嘴和端盖充油嘴入口处均设置有密封垫和封堵螺钉。(The invention relates to a liquid floated gyroscope trial assembly device based on a full rubber ring sealing structure, which aims to solve the problems that the existing method for realizing float static balance by using a whole set of formal gyroscope components needs to be assembled in a gluing and welding manner, time and labor are wasted, and parts of components which are possibly scrapped are disassembled by glue buckling decomposition. The device comprises a shell, a corrugated pipe assembly arranged at one end of the shell, a corrugated pipe pressing ring used for pressing the corrugated pipe assembly on the shell and in threaded connection with the shell, an end cover assembly arranged at the other end of the shell, and an end cover pressing ring used for pressing the end cover assembly on the shell and in threaded connection with the shell. A first O-shaped sealing rubber ring is arranged between the end face of one end of the shell and the corrugated pipe assembly, and a second O-shaped sealing rubber ring is arranged between the end face of the other end of the shell and the end cover assembly. The bellows subassembly outside is provided with the bellows and fills the glib talker, and the end cover subassembly outside is provided with the end cover and fills the glib talker, and the bellows fills the glib talker and the end cover fills glib talker entrance all is provided with sealed the pad and the shutoff screw.)

1. The utility model provides a liquid floated gyroscope tries on dress device based on full rubber ring seal structure which characterized in that:

the corrugated pipe assembly is arranged at one end of the shell, the corrugated pipe pressing ring is used for pressing the corrugated pipe assembly on the shell and is in threaded connection with the shell, the end cover assembly is arranged at the other end of the shell, and the end cover pressing ring is used for pressing the end cover assembly on the shell and is in threaded connection with the shell;

a first O-shaped sealing rubber ring is arranged between the end face of one end of the shell and the corrugated pipe assembly; a second O-shaped sealing rubber ring is arranged between the end face of the other end of the shell and the end cover assembly;

a corrugated pipe oil filling nozzle is arranged on the outer side of the corrugated pipe assembly; an end cover oil filling nozzle is arranged on the outer side of the end cover component; plugging screws are arranged at the inlet of each of the corrugated pipe oil filling nozzle and the end cover oil filling nozzle; sealing gaskets are arranged between the corrugated pipe oil filling nozzle and the connected sealing screws and between the end cover oil filling nozzle and the connected sealing screws.

2. The liquid floated gyroscope trial assembly device based on the full rubber ring sealing structure as claimed in claim 1, wherein:

the outer side of the shell is covered with an overlapping layer; the superposed layer comprises an iron-nickel alloy magnetic shielding layer, a heating layer, an aerogel heat-insulating layer and an aluminized polyimide heat-insulating layer which are sequentially arranged from inside to outside.

3. The liquid floated gyroscope trial assembly device based on the full rubber ring sealing structure as claimed in claim 1 or 2, wherein:

and the shell is provided with a shell insulator and a test socket which are used for electrically connecting the inside and the outside of the shell.

4. The device for trying on the liquid floated gyroscope based on the full rubber ring sealing structure according to claim 3, wherein:

and a mounting flange is arranged on the outer side of the shell.

5. The device for trying on the liquid floated gyroscope based on the full rubber ring sealing structure according to claim 4, wherein:

the first O-shaped sealing rubber ring, the second O-shaped sealing rubber ring and the sealing gasket are all made of oil-resistant nitrile rubber.

6. The utility model provides a liquid floated gyroscope tries on dress device based on full rubber ring seal structure which characterized in that:

the oil nozzle comprises a shell, two end cover assemblies respectively arranged at two ends of the shell, two end cover pressing rings used for respectively pressing the two end cover assemblies at two ends of the shell and in threaded connection with the shell, a corrugated pipe assembly arranged at the outer side of the end cover assembly at one end of the shell, a corrugated pipe pressing ring used for pressing the corrugated pipe assembly on the end cover assembly and in threaded connection with the end cover assembly, an oil nozzle seat arranged at the outer side of the end cover assembly at the other end of the shell, and an oil nozzle seat pressing ring used for pressing the oil nozzle seat on the end cover assembly and in threaded connection with the end cover assembly;

first O-shaped sealing rubber rings are respectively arranged between the end surfaces of the two ends of the shell and the two end cover assemblies; second O-shaped sealing rubber rings are arranged between the corrugated pipe assembly and the connected end cover assembly and between the oil nozzle base and the connected end cover assembly;

the end cover assembly is provided with an oil delivery hole communicated with the inner cavity of the shell; a corrugated pipe oil filling nozzle is arranged on the outer side of the corrugated pipe assembly; the outer side of the oil nozzle base is provided with an oil nozzle base oil filling nozzle; plugging screws are arranged at the inlet of the corrugated pipe oil filling nozzle and the inlet of the oil filling nozzle of the oil nozzle base; sealing gaskets are arranged between the corrugated pipe oil filling nozzle and the connected sealing screws and between the oil filling nozzle of the oil nozzle base and the connected sealing screws.

7. The trial assembly device of the liquid floating gyroscope based on the full rubber ring sealing structure as claimed in claim 6, wherein:

the outer side of the shell is covered with an overlapping layer; the superposed layer comprises an iron-nickel alloy magnetic shielding layer, a heating layer, an aerogel heat-insulating layer and an aluminized polyimide heat-insulating layer which are sequentially arranged from inside to outside.

8. The liquid floated gyroscope trial assembly device based on the full rubber ring sealing structure as claimed in claim 6 or 7, wherein:

and the shell is provided with a shell insulator and a test socket which are used for electrically connecting the inside and the outside of the shell.

9. The trial assembly device of the liquid floating gyroscope based on the full rubber ring sealing structure as claimed in claim 8, wherein:

and a mounting flange is arranged on the outer side of the shell.

10. The trial assembly device of the liquid floating gyroscope based on the full rubber ring sealing structure according to claim 9, characterized in that:

the first O-shaped sealing rubber ring, the second O-shaped sealing rubber ring and the sealing gasket are all made of oil-resistant nitrile rubber.

Technical Field

The invention relates to a static balancing device of a liquid floated gyroscope, in particular to a liquid floated gyroscope trial assembly device based on a full rubber ring sealing structure.

Background

The liquid floated gyroscope (including liquid floated, two floated and three floated gyroscopes) is one kind of gyroscope widely used in inertial navigation system to measure the angular rate of aircraft. The float bearing is mainly characterized in that a rotor is sealed in a float filled with inert gas, the float is suspended in suspension liquid (fluorine oil), the suspension liquid needs to be heated and stabilized to a suspension temperature, the buoyancy and gravity borne by the float are completely balanced through accurate static balance and temperature control, the unloading of a bearing of the float bearing is realized, and therefore the friction torque between the float and a positioning shaft is fully reduced, and the float bearing has the advantages of high precision, high reliability, strong environment adaptability and the like.

The basic composition structure of the liquid floated gyroscope comprises a floater, a sensor assembly for measuring the deflection angle of the floater, a torquer assembly for controlling the rotation angle of the floater, a floater supporting and limiting mechanism, suspension, a shell (comprising a shell and an end cover) for supporting, fixing and sealing each assembly, a temperature control element, an internal and external electrical connecting piece and the like, wherein rotors of the sensor assembly and the torquer assembly are positioned on the floater, and a stator is fixedly connected with the shell. Disturbance torque D proportional to acceleration_I、D_SThe characteristic of the contact ratio of the mass center of the gyroscope floater and the contact ratio of the floating center to the rotating axis or the supporting center is larger D_I、D_SThe gyroscope is easily influenced by structural deformation caused by assembly, environmental stress, thermal expansion coefficient and the like, the center of mass and the floating center of the floater are further unstable, and navigation precision errors caused by system errors such as installation precision errors of an inertial instrument in an inertial navigation system can be amplified, so that the capability of the inertial navigation system is influenced. Thus, a disturbance moment D proportional to the acceleration_I、D_SThe method is one of the most important precision control indexes in the assembly of the liquid-floated gyroscope.

Liquid floated gyroscope D_I、D_SThe assembly precision control is mainly completed through static balance of a gyroscope floater. The float needs to be immersed into suspension liquid at working temperature to adjust balance mass, so that the gravity is equal to the buoyancy, and the moment of the rotating shaft is symmetrical, so as to realize the coincidence of the center of mass and the center of buoyancy of the float. Due to the limitation of the structure and the process method of the gyroscope, the static balance error is large, and the qualification rate is generally lower than 20%.

The method for improving the static balance of the floater is divided into two types, one is to add a special in-vitro fine balance structure on the gyroscope, but the structure of the gyroscope becomes complicated, and interference factors of the stability and the reliability of the gyroscope are increased; the other is to realize fine balance by simulating the assembly process, but needs to be premised on an effective static balance precision detection method. The static balance precision is the unbalanced moment value of the floater bearing gravity and buoyancy to the rotating shaft under the working condition.

At present, the common method for realizing fine balance through simulating the assembly process is to use a whole set of formal gyroscope components and to mount a surface, fill oil and test D through glue joint (epoxy glue)_IAnd D_STrial assembly balance allowance of decomposition and floater allowance can reach D_I、D_SThe required range. This accurate measurement by instrument trial assembly D_I、D_SThe method for correcting the value of the float can simulate the actual working state of the float in the suspension in all directions, and screens the stability of the oil absorption and other centroids of the float, and is also a float static balance method which is always used at present. However, this method adopts formal shell, end cap, oil filling nozzle, etc., and assembles them by glue joint, glue seal, welding seal, and needs to assemble and test D_I、D_SIrrelevant hairspring adjusting mechanisms or magnetic suspension and the like are time-consuming and labor-consuming; in addition, the precision of important components of the gyroscope is easily influenced by large stress of glue-buckling decomposition and disassembly, and the scrapped parts are glued and welded to seal the components.

Disclosure of Invention

The invention provides a liquid floating gyroscope trial assembly device based on a full rubber ring sealing structure, which aims to solve the problems that the existing method for realizing float static balance by using a whole set of formal gyroscope components needs to be assembled in a gluing, glue sealing and welding sealing mode, time and labor are wasted, the precision of important components of a gyroscope is easily influenced due to large stress of glue buckling decomposition and disassembly, and the parts of gluing and welding sealing components can be scrapped.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a liquid floated gyroscope trial assembly device based on a full rubber ring sealing structure is characterized in that:

the corrugated pipe assembly is arranged at one end of the shell, the corrugated pipe pressing ring is used for pressing the corrugated pipe assembly on the shell and is in threaded connection with the shell, the end cover assembly is arranged at the other end of the shell, and the end cover pressing ring is used for pressing the end cover assembly on the shell and is in threaded connection with the shell;

a first O-shaped sealing rubber ring is arranged between the end face of one end of the shell and the corrugated pipe assembly; a second O-shaped sealing rubber ring is arranged between the end face of the other end of the shell and the end cover assembly;

a corrugated pipe oil filling nozzle is arranged on the outer side of the corrugated pipe assembly; an end cover oil filling nozzle is arranged on the outer side of the end cover component; plugging screws are arranged at the inlet of each of the corrugated pipe oil filling nozzle and the end cover oil filling nozzle; sealing gaskets are arranged between the corrugated pipe oil filling nozzle and the connected sealing screws and between the end cover oil filling nozzle and the connected sealing screws.

Further, the outer side of the shell is covered with an overlapping layer; the superposed layer comprises an iron-nickel alloy magnetic shielding layer, a heating layer, an aerogel heat-insulating layer and an aluminized polyimide heat-insulating layer which are sequentially arranged from inside to outside.

Furthermore, a shell insulator and a test socket which are used for electrically connecting the inside and the outside of the shell are arranged on the shell.

Further, a mounting flange is arranged on the outer side of the shell.

Furthermore, the first O-shaped sealing rubber ring, the second O-shaped sealing rubber ring and the sealing gasket are all made of oil-resistant nitrile rubber.

The invention also provides another liquid floated gyroscope trial assembly device based on the full rubber ring sealing structure, which is characterized in that:

the oil nozzle comprises a shell, two end cover assemblies respectively arranged at two ends of the shell, two end cover pressing rings used for respectively pressing the two end cover assemblies at two ends of the shell and in threaded connection with the shell, a corrugated pipe assembly arranged at the outer side of the end cover assembly at one end of the shell, a corrugated pipe pressing ring used for pressing the corrugated pipe assembly on the end cover assembly and in threaded connection with the end cover assembly, an oil nozzle seat arranged at the outer side of the end cover assembly at the other end of the shell, and an oil nozzle seat pressing ring used for pressing the oil nozzle seat on the end cover assembly and in threaded connection with the end cover assembly;

first O-shaped sealing rubber rings are respectively arranged between the end surfaces of the two ends of the shell and the two end cover assemblies; second O-shaped sealing rubber rings are arranged between the corrugated pipe assembly and the connected end cover assembly and between the oil nozzle base and the connected end cover assembly;

the end cover assembly is provided with an oil delivery hole communicated with the inner cavity of the shell; a corrugated pipe oil filling nozzle is arranged on the outer side of the corrugated pipe assembly; the outer side of the oil nozzle base is provided with an oil nozzle base oil filling nozzle; plugging screws are arranged at the inlet of the corrugated pipe oil filling nozzle and the inlet of the oil filling nozzle of the oil nozzle base; sealing gaskets are arranged between the corrugated pipe oil filling nozzle and the connected sealing screws and between the oil filling nozzle of the oil nozzle base and the connected sealing screws.

Further, the outer side of the shell is covered with an overlapping layer; the superposed layer comprises an iron-nickel alloy magnetic shielding layer, a heating layer, an aerogel heat-insulating layer and an aluminized polyimide heat-insulating layer which are sequentially arranged from inside to outside.

Furthermore, a shell insulator and a test socket which are used for electrically connecting the inside and the outside of the shell are arranged on the shell.

Further, a mounting flange is arranged on the outer side of the shell.

Furthermore, the first O-shaped sealing rubber ring, the second O-shaped sealing rubber ring and the sealing gasket are all made of oil-resistant nitrile rubber.

Compared with the prior art, the invention has the beneficial effects that:

according to the liquid floated gyroscope trial assembly device based on the full rubber ring sealing structure, the sealing assembly structure that the shell, the end cover assembly, the corrugated pipe assembly, the oil filling nozzle and the like of the formal liquid floated gyroscope are glued and welded is changed into the sealing and pressing assembly structure of the rubber rings, the sealing gaskets and the pressing assembly structure of the shell, the end cover assembly, the corrugated pipe assembly, the oil filling nozzle and the like of the trial assembly device, so that the work of disassembling and disassembling the floater and removing the weight of the components such as the floater of the liquid floated gyroscope after quick and lossless assembly and accurate test are realized. The rubber ring, the sealing gasket and the compression joint assembly structure are adopted, so that the trial assembly device has higher operation convenience, effectiveness and reliability when being applied; the device has replaced the casing of formal product, end cover subassembly, bellows subassembly, fill glib talker isotructure, and the dress of trying on and the measuring accuracy is stable, and does not have the problem that the subassembly is scrapped or the precision is impaired when decomposing the dismantlement, can long-term used repeatedly, has effectively reduced manufacturing cost.

Drawings

FIG. 1 is a schematic structural diagram of a first embodiment of a trial assembly apparatus for a liquid floating gyroscope based on a full rubber ring sealing structure according to the present invention;

FIG. 2 is a schematic structural diagram of a housing according to a first embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a bellows assembly according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a tip cap assembly according to an embodiment of the present invention;

in fig. 1 to 4, 1-housing, 2-bellows assembly, 3-bellows compression ring, 4-end cap assembly, 5-end cap compression ring, 6-first O-ring seal, 7-second O-ring seal, 8-bellows nozzle, 9-end cap nozzle, 10-sealing screw, 11-sealing pad, 12-housing insulator, 13-mounting flange, 14-test cable, 15-bearing block assembly, 16-bearing mounting limit hole, 17-sealing groove, 18-float support mechanism, 19-superimposed layer;

FIG. 5 is a schematic structural diagram of a second embodiment of a trial assembly apparatus for a liquid floating gyroscope according to the present invention, which is based on a full rubber ring sealing structure;

FIG. 6 is a schematic structural diagram of a second embodiment of the present invention;

in fig. 5 to 6, 21-shell, 22-end cover component, 23-end cover press ring, 24-bellows component, 25-bellows press ring, 26-nozzle seat, 27-nozzle seat press ring, 28-first O-shaped sealing rubber ring, 29-second O-shaped sealing rubber ring, 30-oil conveying hole, 31-bellows oil filling nozzle, 32-nozzle seat oil filling nozzle, 33-blocking screw, 34-sealing gasket, 35-shell insulator, 36-mounting flange, 37-test cable, 38-axial magnetic suspension stator, 39-magnetic suspension insulator, 40-superimposed layer.

Detailed Description

In order to make the objects, advantages and features of the present invention more apparent, the following detailed description of the trial assembly apparatus of a liquid crystal gyroscope based on a full rubber ring sealing structure according to the present invention is provided with reference to the accompanying drawings and specific embodiments.

Example one

The liquid level gyroscope trial assembly device based on the full rubber ring sealing structure provided by the embodiment is shown in fig. 1, and comprises a single-end open type casing 1, a corrugated pipe assembly 2 arranged at the left end of the casing 1, a corrugated pipe press ring 3 used for pressing the corrugated pipe assembly 2 onto the casing 1 and in threaded connection with the casing 1, an end cover assembly 4 arranged at the right end of the casing 1, and an end cover press ring 5 used for pressing the end cover assembly 4 onto the casing 1 and in threaded connection with the casing 1.

Considering that the sealing surfaces of the corrugated pipe assembly 2, the end cover assembly 4 and the shell 1 are large, and the micron-sized axial and radial clearance assembly requirements of the float assembly are met, the sealing structure which is convenient to process, stable in structure, high in sealing reliability and easy to control the sealing compression depth and is matched with the sealing groove is adopted, and the corrugated pipe assembly 2, the end cover assembly 4 and the shell 1 are pressed, fixed and sealed through the corresponding threaded fit of the inner wall of the pressing ring and the fine teeth of the outer circle of the shell 1.

Specifically, as shown in fig. 2, the end faces of the two ends of the housing 1 are provided with sealing grooves 17 for placing O-shaped sealing rubber rings, and the outer circles of the two ends of the housing 1 are provided with connecting threads. A first O-shaped sealing rubber ring 6 is arranged between the sealing groove 17 on the left end face of the shell 1 and the corrugated pipe assembly 2, and a second O-shaped sealing rubber ring 7 is arranged between the sealing groove 17 on the right end face of the shell 1 and the end cover assembly 4.

As shown in fig. 3 and 4, a bellows oil filling nozzle 8 communicated with the inner cavity of the housing 1 is arranged on the outer side of the bellows assembly 2, and an end cap oil filling nozzle 9 communicated with the inner cavity of the housing 1 is arranged on the outer side of the end cap assembly 4, because the sealing surface of the oil filling nozzle is small and has no axial dimension requirement, the inlet end surfaces of the bellows oil filling nozzle 8 and the end cap oil filling nozzle 9 are respectively provided with a sealing gasket 11, and are pressed and blocked by using a blocking screw 10.

The first O-shaped sealing rubber ring 6, the second O-shaped sealing rubber ring 7 and the sealing gasket 11 are all made of oil-resistant nitrile rubber, the O-shaped sealing rubber ring is a universal standard component, and the sealing gasket 11 is specially prepared.

In order to simplify the structure and the assembly process of the trial assembly device, the invention removes the heat preservation and magnetic isolation outer cover of the formal gyroscope, and covers the superposed layer 19 on the outer side of the shell 1, wherein the superposed layer 19 comprises an iron-nickel alloy magnetic shielding layer, a heating layer, an aerogel heat preservation layer and an aluminized polyimide heat insulation layer which are sequentially arranged from inside to outside, so as to obtain ideal magnetic shielding and heat insulation effects. The two ends of the shell 1 are also provided with a shell insulator 12 and a test socket which are used for electrical connection between the inside and the outside of the shell 1, and the test cable 14 can be directly installed and welded for solidification without additionally installing a switching wiring board. During assembly, all electromagnetic elements in the shell 1 are welded to the inner lead of the shell insulator 12, and the test cable 14 is not welded repeatedly during each assembly.

In order to improve the universality of the trial assembly device of the liquid floating gyroscope, the mounting flange 13 is arranged on the outer side of the shell 1, all components are assembled according to the assembly scribed lines of the shell 1, and the three-axis directions of the gyroscope of the trial assembly device are determined together with the shell floater limiting hole and the mounting flange 13.

The left end in the shell 1 is also provided with a bearing mounting limiting hole 16 and a fixing thread of a bearing seat assembly 15 for supporting the floater, and the center of the inner side of the end cover assembly 4 is provided with a floater supporting mechanism 18 which provides a rotary shaft positioning support for the gyroscope floater together with the bearing seat assembly 15. The locking of the float supporting structure adopts double-thread interlocking, and a stable float axial clearance can be obtained without glue fixation through a high-precision fine-tooth thread structure and a lengthened thread stroke.

To improve the service life and reliability of the end cap assembly 4 and the bearing housing assembly 15, the float support mechanism 18 and the bearing housing assembly 15 are floatedThe bearing pad for the sub-bearing is made of hard alloy instead of red corundum, so that the phenomenon that the output of the gyroscope is influenced by damage, cracking and even slag falling of the red corundum bearing pad caused by repeated assembly can be avoided. Compared with a bearing pad made of red corundum, the micro friction torque introduced by the hard alloy material screens related D for gyroscope floater balance and mass center stability_I、D_SThe constant value and the long-term stability test thereof have no influence.

Due to the factors such as the linear expansion coefficient of the O-shaped sealing rubber ring, in order to ensure the effectiveness of the axial clearance of the floater and avoid the small ball shaft and the bearing pad from being pushed up at high and low temperatures, the axial clearance of the floater can be widened to 0.03-0.05 mm; the radial fit clearance between the end cover assembly 4 and the shell 1, between the float rotating shaft and the support bearing is reasonably widened to 0.016-0.03 mm, the universality of the trial assembly device can be improved, and the trial assembly device is easy to assemble and disassemble. The gyro oil filling cavity structure is optimized by the large axial and radial fit clearance and the reasonable oil conveying hole design, the oil filling vacuum degree can be reduced by 1-1.5 orders of magnitude (only a mechanical pump can be used), the fluorine oil dripping speed can be increased to 8 drops/min from 2 drops/min, the vacuum pressure maintaining time before oil dripping is greatly reduced, and the oil filling time of a trial assembly device is shortened to be lower than 1/5 of a formal product.

During assembly, firstly, a floater, a sensor, a torquer stator assembly, a conductive hairspring and the like are sequentially assembled in a shell 1, after sensor parameters are adjusted, a second O-shaped sealing rubber ring 7, an end cover assembly 4 and an end cover pressing ring 5 are sequentially installed at the right end of the shell 1, and the end cover assembly 4 is fixed and sealed by screwing the end cover pressing ring 5; the bearing seat assembly 15 is arranged so that shaft balls at two ends of a floater respectively enter central bearing holes of the bearing seat assembly 15 and the floater supporting mechanism 18, a bearing locking mechanism is used for adjusting the axial position of the floater, a first O-shaped sealing rubber ring 6, a corrugated pipe assembly 2 and a corrugated pipe pressure ring 3 are sequentially arranged at the left end of the shell 1, and the corrugated pipe pressure ring 3 is screwed down to fix and seal the corrugated pipe assembly 2; after the bellows oil filling nozzle 8 and the end cover oil filling nozzle 9 are used for filling oil into the inner cavity of the shell 1, the sealing gasket 11 and the sealing screw 10 are installed, the sealing screw 10 is screwed at the inlet of the oil filling nozzle and compresses the sealing gasket 11 to seal the oil filling nozzle, so that the assembly and the sealing of the trial assembly device are completed, and the test of relevant gyroscope parameters can be carried out.

During testing, the mounting flange 13 is aligned with a groove of a matched testing tool, the end face of the mounting flange 13 is attached to the end face of the testing tool, and then the testing reference of the testing device can be aligned.

The leakage rate of a helium mass spectrum at normal temperature of the trial assembly device is consistent with that of a gyroscope sealed and assembled by epoxy glue, the gyroscope can be reliably sealed for a long time within the sealing temperature range of the effective liquid floated gyroscope after being filled with oil at high temperature, glue is not needed to be dispensed in the whole assembly and sealing process, glue does not need to be buckled or any component does not need to be damaged during disassembly, the filled fluorine oil is free of pollution such as metal chips and glue chips, and the device can be used for trial assembly of a gyroscope floater again after being filtered in a quantitative filter paper oven.

Through tests, the testing device is consistent with the gyroscope assembled by splicing formal components in testing precision, repeatability and once power-on position repeatability within 0.1(°)/(h · g), and the floater is assembled with the formal components by using the testing device to obtain D_I、D_SThe difference value is within 1 (DEG)/(h.g), and the variation of the scale factor is 0.0003-0.003; before and after stabilization treatment D_I、D_SD of the high-temperature running-in is within 0.5 (DEG)/(h.g) within 150h_I、D_SThe variation is within 0.5 (degree)/(h g), and the qualified rate of formal installation of the floater exceeds 90% (2.6 (degree)/(h g) exceeds 90%, and 1.5 (degree)/(h g) exceeds 70%) by combining accurate and effective floater removing operation. The time consumed by assembling and disassembling the trial assembly device is reduced to 1/5, and the time consumed by oil filling is reduced to 1/5. The test-loading device is used for testing the gyroscope D in long-time continuous power-on test, running-in or intermittent start-stop test_I、D_SThe repeatability precision of the test is ideal, and the change condition of the center of mass of the floater can be truly reflected. Gyroscope D for contrast stabilization treatment and high-temperature running-in pre-and-post test_I、D_SAnd the early failure fault screening of the stability of the mass center of the floater can be realized.

The reliable sealing range of the trial assembly device is-10-90 ℃ (covering the fluorine oil solidifying point of the formal gyroscope to the glue layer failure temperature), the effective sealing time of one-time assembly is not less than one year at normal temperature, the accumulated high-temperature electrification is not less than 5000h, the high-temperature and low-temperature screening is not less than 20 at (-8-80 ℃), and the trial assembly device still has good D after the test_I、D_SAnd testing the precision.

Example two

As shown in fig. 5 and 6, the liquid level gyroscope trial assembly apparatus based on the full rubber ring sealing structure according to this embodiment includes a casing 21 with two open ends, two end cover assemblies 22 respectively disposed at two ends of the casing 21, two end cover press rings 23 for respectively pressing the two end cover assemblies 22 against two ends of the casing 21 and being in threaded connection with the casing 21, a bellows assembly 24 disposed outside the left end cover assembly 22 of the casing 21, a bellows press ring 25 for pressing the bellows assembly 24 against the end cover assembly 22 and being in threaded connection with the end cover assembly 22, an oil nozzle seat 26 disposed outside the right end cover assembly 22 of the casing 21, and an oil nozzle seat press ring 27 for pressing the oil nozzle seat 26 against the end cover assembly 22 and being in threaded connection with the end cover assembly 22.

The end faces of two ends of the shell 21 are provided with sealing grooves for placing O-shaped sealing rubber rings, and the outer circles of the two ends of the shell are provided with connecting threads. First O-shaped sealing rubber rings 28 are respectively arranged between the sealing grooves on the end faces of the two ends of the shell 21 and the two end cover assemblies 22. The end cover assembly 22 is also provided with a sealing groove for placing an O-ring seal on the outer end surface, and a connecting thread is arranged on the outer circle of the end cover assembly near the outer side. And second O-shaped sealing rubber rings 29 are arranged between the bellows assembly 24 and the sealing groove of the connected end cover assembly 22 and between the oil nozzle seat 26 and the sealing groove of the connected end cover assembly 22.

The end cover assembly 22 is provided with an oil delivery hole 30 communicated with the inner cavity of the shell 21, the outer side of the corrugated pipe assembly 24 is provided with a corrugated pipe oil filling nozzle 31 communicated with the adjacent oil delivery hole 30, the outer side of the oil nozzle base 26 is provided with an oil nozzle base oil filling nozzle 32 communicated with the adjacent oil delivery hole 30, and the inlet end faces of the corrugated pipe oil filling nozzle 31 and the oil nozzle base oil filling nozzle 32 are respectively provided with a sealing gasket 34 and are sealed by a sealing screw 33 in a compression joint mode.

The outer side of the shell 21 is covered with an overlapping layer 40, and the overlapping layer 40 comprises an iron-nickel alloy magnetic shielding layer, a heating layer, an aerogel heat-insulating layer and an aluminized polyimide heat-insulating layer which are sequentially arranged from inside to outside so as to obtain ideal magnetic shielding and heat insulating effects. The shell 21 is also provided with a shell insulator 35 and a test socket at both ends thereof for electrical connection between the inside and outside of the shell 21, so that the test cable 37 can be directly installed and welded for solidification without additionally installing a switching wiring board. During assembly, all electromagnetic elements in the shell 21 are welded to the inner lead of the shell insulator 35, and the test cable 37 is not welded repeatedly during each assembly.

In order to improve the universality of the trial assembly device of the liquid floating gyroscope, the mounting flange 36 is arranged on the outer side of the shell 21, all components are assembled according to the assembly scribed lines of the shell 21, and the three-axis directions of the gyroscope of the trial assembly device are determined together with the shell floater limiting hole and the mounting flange 36.

An axial magnetic suspension stator 38 is arranged at the center of the inner side of the end cover assembly 22 and is matched with an axial magnetic suspension rotor arranged on the floater for use, so that the axial working clearance of the floater can be accurately adjusted, and the assembly precision and reliability are ensured. The inner wall of the center hole of the end cover is provided with high-precision fine threads which can be used for adjusting and locking the axial clearance between the float supporting mechanism and the float rotating shaft, and the float supporting mechanism is locked by adopting double-thread interlocking without dispensing. Because the end face of the rotary shaft of the floater is provided with the bearing pad, the original hard alloy is replaced by the high-strength and high-hardness nickel-based elastic alloy with hardness lower than that of the bearing pad to serve as the material of the small shaft of the trial-installed ball, and the bearing pad can be thoroughly prevented from being damaged when the floater assembly is assembled. The axial clearance of the floater is widened to 0.03-0.04 mm, the radial fit clearance between the end cover assembly 22 and the shell 21 as well as between the floater rotating shaft and the supporting bearing is widened to 0.016-0.03 mm, the universality of the trial assembly device is improved, the oil filling convenience is improved, and the trial assembly device is easy to assemble and disassemble.

During assembly, the sensor assembly is assembled to a spigot at the left end of the shell 21, and then the floater assembly and the torquer assembly are assembled from the right end of the shell 21 in sequence; after welding the conductive balance spring and adjusting the parameters of the sensor, respectively and sequentially installing a first O-shaped sealing rubber ring 28, an end cover assembly 22 and an end cover pressing ring 23 at two ends of the shell 21, and screwing the end cover pressing ring 23 to fix and seal the end cover assembly 22; a shaft tip assembly is arranged in a center hole of the end cover, so that shaft small balls at two ends respectively enter a center bearing hole of the floater assembly, a magnetic suspension axial test line is connected to a magnetic suspension insulator 39 of the end cover assembly 22, and the axial position of the floater is adjusted and locked by an axial magnetic suspension real-time monitoring shaft tip locking mechanism; a second O-shaped sealing rubber ring 29, a corrugated pipe assembly 24 and a corrugated pipe press ring 25 are sequentially arranged on the outer side of the left end cover assembly 22, and the corrugated pipe press ring 25 is screwed down to fix and seal the corrugated pipe assembly 24; a second O-shaped sealing rubber ring 29, an oil nozzle seat 26 and an oil nozzle seat pressing ring 27 are sequentially arranged on the outer side of the right end cover assembly 22, and the oil nozzle seat pressing ring 27 is screwed down to fix and seal the oil nozzle seat 26; after the bellows oil filling nozzle 31 and the oil filling nozzle seat 32 are used for filling oil into the inner cavity of the shell 21, the sealing gasket 34 and the plugging screw 33 are installed, the plugging screw 33 is screwed at the inlet of the oil filling nozzle and compresses the sealing gasket 34 to seal the oil filling nozzle, so that the assembly and the sealing of the trial assembly device are completed, and the test of relevant gyroscope parameters can be carried out.

During testing, the mounting flange 36 is aligned with a groove of a matched testing tool, the end face of the mounting flange 36 is attached to the end face of the testing tool, and accordingly a gyroscope testing reference can be aligned.

Through tests, the testing device is consistent with the gyroscope assembled by splicing formal components in testing precision, repeatability and once power-on position repeatability within 0.1(°)/(h · g), and the floater is assembled with the formal components by using the testing device to obtain D_I、D_SThe difference is within 1 (DEG)/(h.g), and the scale factor change is 0.0005-0.003; before and after stabilization treatment D_I、D_SThe variable quantity is within 0.8 (degree)/(h.g), the accurate float deglue correction is carried out according to the tested value, the qualified rate of formal installation of the float exceeds 90 percent (2.6 (degree)/(h.g) exceeds 90 percent, and 1.5 (degree)/(h.g) exceeds 60 percent), and the early failure fault screening of the stability of the center of mass of the float can be realized. The time consumed by assembling and disassembling the trial assembly device is reduced to 1/8, and the time consumed by oil filling is reduced to 1/7.

The reliable sealing range of the trial assembly device is-10-90 ℃ (covering the fluorine oil solidifying point of the formal gyroscope to the glue layer failure temperature), the effective sealing time of one-time assembly is not less than one year at normal temperature, the accumulated high-temperature electrification is not less than 5000h, the high-temperature and low-temperature screening is not less than 20 at (-8-80 ℃), and the trial assembly device still has good D after the test_I、D_SAnd testing the precision. The trial assembly device is also used for 5000 times of reliability life tests such as high-temperature start-stop tests and the like of the gyroscope motor, and saves product resources and cycle.

In addition, for the gyroscope structure with the sensor and the torquer integrated in the end cover assembly, the sensor stator and the torquer stator are additionally assembled when a brand-new trial-assembly end cover assembly is used, the cost is high, and the product resources are occupied.

When the trial assembly device is assembled in specific application, as the crimping threads are all arranged on the shell, the end cover can move upwards by about 2 micrometers (can be measured by axial magnetic suspension) when the corrugated pipe assembly is crimped, and a margin (including a margin for stress release when the shaft tip is locked) of not less than 8 micrometers is required to be reserved when the axial clearance of the floater is adjusted, so that the dead jacking of a small shaft ball and a bearing pad of a supporting mechanism is avoided.