阅读说明：本技术 一种液浮仪表用高密封性能输电结构 (High-sealing-performance power transmission structure for liquid floating instrument ) 是由 樊景松 周永杰 杨国仓 杨雷 刘岗 王宇扬 李亮 张智 李健 王文佳 沙立 邓 于 2021-08-23 设计创作，主要内容包括：本发明涉及一种液浮仪表用高密封性能输电结构,属于精密仪表领域；外部的浮子组件为中空柱状结构；浮子组件的轴端处设置有通线孔；接线柱为轴向一端设置有盲孔的筒状结构；引线的一端伸入接线柱的盲孔中,且引线外壁与接线柱盲孔内壁通过钎料焊接；密封绝缘短套管套装在接线柱的外壁；密封绝缘长套管套装在引线的外壁,且密封绝缘长套管与密封绝缘短套管的轴向相对面实现对接；接线柱、密封绝缘短套管、钎料、密封绝缘长套管和引线组成输电结构；输电结构沿轴向固定安装在通线孔中本发明不仅能实现精密结构体内外输电可靠、绝缘可靠,而且大幅度提高了产品的密封性能,在提高产品生产合格率的同时,提高了液浮仪表的长期工作可靠性和稳定性。(The invention relates to a high-sealing-performance power transmission structure for a liquid floating instrument, belonging to the field of precision instruments; the external floater component is of a hollow cylindrical structure; a through hole is formed at the shaft end of the floater component; the binding post is of a cylindrical structure with a blind hole at one axial end; one end of the lead extends into the blind hole of the binding post, and the outer wall of the lead is welded with the inner wall of the blind hole of the binding post through brazing filler metal; the sealed insulating short sleeve is sleeved on the outer wall of the binding post; the long sealing insulating sleeve is sleeved on the outer wall of the lead, and the axial opposite surfaces of the long sealing insulating sleeve and the short sealing insulating sleeve are butted; the binding post, the short sealed insulating sleeve, the brazing filler metal, the long sealed insulating sleeve and the lead form a power transmission structure; the invention can realize reliable power transmission and insulation inside and outside the precision structure body, greatly improve the sealing performance of the product, and improve the long-term working reliability and stability of the liquid floating instrument while improving the production qualification rate of the product.)

1. The utility model provides a high leakproofness ability transmission of electricity structure for liquid floats instrument which characterized in that: the device comprises a binding post (2), a short sealing insulating sleeve (4), brazing filler metal (5), a long sealing insulating sleeve (6) and a lead (8); wherein, the external floater component is a hollow columnar structure; a through hole (1) is arranged at the shaft end of the floater component; the binding post (2) is a cylindrical structure with a blind hole at one axial end; one end of the lead (8) extends into the blind hole of the binding post (2), and the outer wall of the lead (8) is welded with the inner wall of the blind hole of the binding post (2) through brazing filler metal (5); the sealed insulating short sleeve (4) is sleeved on the outer wall of the binding post (2); the long sealing insulating sleeve (6) is sleeved on the outer wall of the lead (8), and the axial opposite surfaces of the long sealing insulating sleeve (6) and the short sealing insulating sleeve (4) are butted; the binding post (2), the short sealing insulating sleeve (4), the brazing filler metal (5), the long sealing insulating sleeve (6) and the lead (8) form a power transmission structure; the power transmission structure is fixedly arranged in the through hole (1) along the axial direction.

2. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 1, characterized in that: the extending end of the lead wire (8) points to the inner cavity of the floater component; the extending end of the binding post (2) points to the outer side of the floater component; a second glue storage groove (7) is formed in the end face, located at the extending end of the lead (8), of the through hole (1); the end face of the through wire hole (1) at the extending end of the binding post (2) is provided with a first glue storage groove (3).

3. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 2, characterized in that: the first glue storage tank (3) and the second glue storage tank (7) are both annular grooves, the first glue storage tank (3) and the second glue storage tank (7) are the same in size, and the radial groove widths are both 0.2-0.4 mm; the depth of the groove is 0.5-1 mm.

4. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 3, characterized in that: the sealing insulation short sleeve (4) and the wiring terminal (2), the sealing insulation long sleeve (6) and the lead (8), the sealing insulation short sleeve (4) and the through hole (1), the sealing insulation long sleeve (6) and the through hole (1), the first glue storage groove (3) and the second glue storage groove (7) are filled with low linear expansion high-temperature sealant.

5. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 4, wherein: the linear thermal expansion coefficient difference between the short sealed and insulated sleeve (4) and the wiring terminal (2), between the long sealed and insulated sleeve (6) and the lead (8), between the short sealed and insulated sleeve (4) and the through hole (1) and between the long sealed and insulated sleeve (6) and the through hole (1) does not exceed 2 multiplied by 10^-5/℃。

6. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 5, characterized in that: the through hole (1) is of a stepped hole structure; the long sealing and insulating sleeve (6) is positioned in the small-diameter section of the through hole (1), and the short sealing and insulating sleeve (4) is positioned in the large-diameter section of the through hole (1); the short sealing insulating sleeve (4) and the long sealing insulating sleeve (6) are axially positioned through the stepped hole; the outer end face of the long sealing insulating sleeve (6) is flush with the end face of the through hole (1) pointing to the inner cavity of the floater component; the outer end face of the short sealing insulating sleeve (4) is flush with the end face of the through hole (1) back to the inner cavity of the floater component.

7. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 6, characterized in that: the binding post (2) is made of a silver-plated copper material; the short sealing and insulating sleeve (4) and the long sealing and insulating sleeve (6) are made of ceramic materials.

8. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 7, characterized in that: the lead (8) is a single-strand wire capable of being glued.

9. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 8, characterized in that: the leakage rate of the floater assembly after the power transmission structure is installed is improved to 5.0 multiplied by 10^-10Pa·m³/s。

10. The high-sealing-performance power transmission structure for the liquid floating instrument according to claim 9, characterized in that: the installation process of the power transmission structure is as follows:

inserting a lead (8) into a blind hole at the end part of the binding post (2), and welding through brazing filler metal (5); sleeving the sealed insulating short sleeve (4) into the outer wall of the wiring terminal (2), and integrally installing the sealed insulating short sleeve into the through hole (1); the end face of the short sealed insulating sleeve (4) is attached to the end face of the through hole (1); and sleeving the long sealing and insulating sleeve (6) on the outer wall of the lead (8), and pushing the long sealing and insulating sleeve (6) into the through hole (1).

Technical Field

The invention belongs to the field of precision instruments and relates to a high-sealing-performance power transmission structure for a liquid floating instrument.

Background

The liquid floating instrument has the working characteristics that the gyro motor is sealed in the sealed float cavity, the float eliminates friction interference torque through the floating liquid support, and the precision stability of the instrument is improved, so that the precision and the reliability of the instrument are directly influenced by the sealing performance of the float cavity. The float sealing performance index of the former generation hydrostatic floating instrument is that the leak rate is less than or equal to 1.33 multiplied by 10^-8Pa·m³The float sealing performance index of the new generation of liquid floating instrument is improved by one order of magnitude along with the continuous improvement of the use precision and the service life requirement of the instrument, and the leakage rate requirement is less than or equal to 1.33 multiplied by 10^-9Pa·m³/s。

The sealing performance of the float component applying the original state power transmission structure is generally 0.9 multiplied by 10^-9～1.3×10^-9Pa·m³And/s, the safety margin is small. Due to the particularity of matching and bonding of various materials of the bonding structure, the sealing performance of the bonding structure is easily influenced by the change of high and low temperature environments; after the float assembly is sealed and is delivered to the instrument, the float assembly needs to be subjected to temperature change conditions for dozens of times, the high-temperature and low-temperature change conditions can cause the sealing performance of the float to be reduced, and even the float assembly is subjected to temperature change conditionsThe problem of leakage rate over-tolerance is caused, the one-time assembly sealing qualified rate of the float component is influenced, and the improvement of the later application reliability and precision of the instrument is restricted.

Disclosure of Invention

The technical problem solved by the invention is as follows: the defects in the prior art are overcome, the high-sealing-performance power transmission structure for the liquid floating instrument is provided, the reliable power transmission inside and outside the precise structure body and the reliable insulation can be realized, the sealing performance of a product is greatly improved, and the long-term working reliability and stability of the liquid floating instrument are improved while the production yield of the product is improved.

The technical scheme of the invention is as follows:

a high-sealing-performance power transmission structure for a liquid floating instrument comprises a binding post, a short sealing insulation sleeve, brazing filler metal, a long sealing insulation sleeve and a lead; wherein, the external floater component is a hollow columnar structure; a through hole is formed at the shaft end of the floater component; the binding post is of a cylindrical structure with a blind hole at one axial end; one end of the lead extends into the blind hole of the binding post, and the outer wall of the lead is welded with the inner wall of the blind hole of the binding post through brazing filler metal; the sealed insulating short sleeve is sleeved on the outer wall of the binding post; the long sealing insulating sleeve is sleeved on the outer wall of the lead, and the axial opposite surfaces of the long sealing insulating sleeve and the short sealing insulating sleeve are butted; the binding post, the short sealed insulating sleeve, the brazing filler metal, the long sealed insulating sleeve and the lead form a power transmission structure; the power transmission structure is fixedly arranged in the through hole along the axial direction.

In the above high-sealing-performance power transmission structure for the liquid floating instrument, the extending end of the lead wire points to the inner cavity of the float assembly; the extending end of the binding post points to the outer side of the floater component; a second glue storage groove is formed in the end face, located at the extending end of the lead wire, of the through wire hole; the end face of the through wire hole, which is located at the extending end of the binding post, is provided with a first glue storage groove.

In the power transmission structure with high sealing performance for the liquid floating instrument, the first glue storage tank and the second glue storage tank are both annular grooves, the first glue storage tank and the second glue storage tank have the same size, and the radial groove widths are both 0.2-0.4 mm; the depth of the groove is 0.5-1 mm.

In the above high-sealing-performance power transmission structure for the liquid floating instrument, the low-linear-expansion high-temperature sealant is filled between the short sealing insulation sleeve and the binding post, between the long sealing insulation sleeve and the lead wire, between the short sealing insulation sleeve and the through wire hole, between the long sealing insulation sleeve and the through wire hole, in the first glue storage groove and the second glue storage groove.

In the above high-sealing-performance power transmission structure for the liquid floating instrument, the differences of the linear thermal expansion coefficients between the short sealed insulating sleeve and the binding post, between the long sealed insulating sleeve and the lead wire, between the short sealed insulating sleeve and the through hole, and between the long sealed insulating sleeve and the through hole are not more than 2 x 10^-5/℃。

In the above high-sealing-performance power transmission structure for the liquid floating instrument, the through hole is a stepped hole structure; the long sealing and insulating sleeve is positioned in the small-diameter section of the through hole, and the short sealing and insulating sleeve is positioned in the large-diameter section of the through hole; the axial positioning of the short sealing insulating sleeve and the long sealing insulating sleeve is realized through the stepped hole; the outer end face of the long sealing insulating sleeve is flush with the end face of the through hole pointing to the inner cavity of the floater component; the outer end face of the short sealing insulating sleeve is flush with the end face of the through hole, which is back to the inner cavity of the floater component.

In the above high-sealing-performance power transmission structure for the liquid floating instrument, the binding post is made of a silver-plated copper material; the short sealing insulating sleeve and the long sealing insulating sleeve are made of ceramic materials.

In the above high-sealing-performance power transmission structure for the liquid floating instrument, the lead is a single-stranded wire capable of being glued.

In the high-sealing-performance power transmission structure for the liquid floating instrument, the floater component is arranged after the power transmission structure is installed, and the leakage rate is improved to 5.0 multiplied by 10^-10Pa·m³/s。

In the above-mentioned high leakproofness ability transmission of electricity structure for liquid superficial instrument, the installation of transmission of electricity structure is:

inserting a lead into a blind hole at the end part of the binding post, and welding through brazing filler metal; sleeving the short sealed insulating sleeve into the outer wall of the binding post, and integrally installing the short sealed insulating sleeve into the through wire hole; the end face of the short sealed insulating sleeve is attached to the end face of the through wire hole; and sleeving the sealing and insulating long sleeve on the outer wall of the lead, and pushing the sealing and insulating long sleeve into the through hole.

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

(1) the invention ensures reliable power transmission and insulation inside and outside the floater without influencing the integral structure of the instrument, and simultaneously ensures the sealing performance of the floater to be 1.0 multiplied by 10 from the original structure^-9Pa·m³The leakage rate level of/s is improved to 5.0 multiplied by 10^-10Pa·m³The safety margin of the product is improved;

(2) in the actual production process of the product, the one-time assembly sealing qualified rate of the floater is improved to more than 90% from 65% of the original structure, the repair cost is greatly reduced, and the productivity and the production efficiency are improved;

(3) the invention reduces the risk of air bubbles and seepage caused by micro leakage of the floater and improves the long-term precision and reliability of the instrument.

Drawings

Fig. 1 is a schematic view of a power transmission structure according to the present invention.

Detailed Description

The invention is further illustrated by the following examples.

In order to improve the sealing performance of the original power transmission structure, the invention provides the high-sealing-performance power transmission structure for the liquid floating instrument, which improves the sealing performance of a floater assembly, improves the product design margin and the production qualification rate and reduces the reliability and precision risk of later application of the instrument on the premise of ensuring the reliable power transmission inside and outside the floater.

The power transmission structure specifically comprises a binding post 2, a short sealed insulating sleeve 4, brazing filler metal 5, a long sealed insulating sleeve 6 and a lead 8 as shown in fig. 1; wherein, the external floater component is a hollow columnar structure; a through hole 1 is arranged at the shaft end of the floater component; the binding post 2 is a cylindrical structure with a blind hole at one axial end; one end of the lead 8 extends into the blind hole of the binding post 2, and the outer wall of the lead 8 is welded with the inner wall of the blind hole of the binding post 2 through the brazing filler metal 5; the sealed insulating short sleeve 4 is sleeved on the outer wall of the binding post 2; the long sealing and insulating sleeve 6 is sleeved on the outer wall of the lead 8, and the axial opposite surfaces of the long sealing and insulating sleeve 6 and the short sealing and insulating sleeve 4 are butted; the binding post 2, the short sealed insulating sleeve 4, the brazing filler metal 5, the long sealed insulating sleeve 6 and the lead 8 form a power transmission structure; the power transmission structure is fixedly arranged in the through hole 1 along the axial direction.

The extending end of the lead wire 8 points to the inner cavity of the float assembly; the extending end of the binding post 2 points to the outer side of the float assembly; a second glue storage groove 7 is formed in the end face, located at the extending end of the lead 8, of the through hole 1; the end face of the through wire hole 1, which is positioned at the extending end of the binding post 2, is provided with a first glue storage groove 3.

The first glue storage tank 3 and the second glue storage tank 7 are both annular grooves, the first glue storage tank 3 and the second glue storage tank 7 are the same in size, and the radial groove widths are both 0.2-0.4 mm; the depth of the groove is 0.5-1 mm. For redundant sealing and absorbing external impacts.

Between sealed insulating short sleeve 4 and terminal 2, between sealed insulating long sleeve 6 and lead wire 8, between sealed insulating short sleeve 4 and the logical line hole 1, between sealed insulating long sleeve 6 and the logical line hole 1, first glue storage tank 3, second glue storage tank 7 all adopt low linear expansion high temperature sealed glue to fill up.

The linear thermal expansion coefficient difference between the sealed insulating short sleeve 4 and the wiring terminal 2, between the sealed insulating long sleeve 6 and the lead wire 8, between the sealed insulating short sleeve 4 and the through hole 1 and between the sealed insulating long sleeve 6 and the through hole 1 does not exceed 2 multiplied by 10^-5/℃。

The through hole 1 is of a step hole structure; the long sealing and insulating sleeve 6 is positioned in the small-diameter section of the through hole 1, and the short sealing and insulating sleeve 4 is positioned in the large-diameter section of the through hole 1; the axial positioning of the short sealing insulating sleeve 4 and the long sealing insulating sleeve 6 is realized through the stepped hole; the outer end face of the long sealing insulating sleeve 6 is flush with the end face of the through hole 1 pointing to the inner cavity of the floater component; the outer end face of the short sealing insulating sleeve 4 is flush with the end face of the through hole 1, which is back to the inner cavity of the floater assembly.

Lead to line hole 1 is the step hole that has locate function, and terminal 2 is the transmission of electricity structure that adopts the one end plug-in welding lead wire that silver-plated copper product made, and the cylinder pipe that sealed insulating short sleeve 4, sealed insulating long sleeve 6 were made for the electronic components structure ceramic material that adopts to have insulating nature and gas tightness concurrently, but lead wire 8 chooses for use the sub-strand wire rod of viscose. The lead 8 is a single strand of wire that can be glued.

The leakage rate of the floater assembly after the power transmission structure is installed is improved to 5.0 multiplied by 10^-10Pa·m³/s。

The installation process of the power transmission structure is as follows:

inserting a lead 8 into a blind hole at the end part of the binding post 2 and welding through the brazing filler metal 5; sleeving the sealed insulating short sleeve 4 into the outer wall of the binding post 2, and integrally installing the sealed insulating short sleeve into the through wire hole 1; the end face of the short sealing insulating sleeve 4 is attached to the end face of the through hole 1; and sleeving the sealing and insulating long sleeve 6 on the outer wall of the lead wire 8, and pushing the sealing and insulating long sleeve 6 into the through wire hole 1. In addition, the glue spreading process comprises the following specific steps:

and welding the lead 8 with the binding post 2 in a brazing mode, then coating glue on the bonding surface of the excircle of the binding post, sleeving the sealed insulating short sleeve 4 into the binding post 2 until the structure is limited, and curing the glue solution as required to form the binding post assembly.

And gluing the excircle of the terminal post assembly, putting the excircle into the through hole 1 until the structure is limited, filling glue solution into the glue storage tank 3, and curing the glue solution as required.

And (3) penetrating the long sealed insulating sleeve 6 through the lead 8, loading the long sealed insulating sleeve into the wire passing stepped hole of the sealed cavity from the other side, filling the glue storage tank 7 and all the gaps in the structure with glue solution, pouring the glue under the condition of vacuumizing in order to avoid the influence of bubbles remaining in the glue solution on the sealing performance, and finally curing the glue solution according to requirements.

The invention ensures reliable power transmission and insulation inside and outside the floater without influencing the integral structure of the instrument, and simultaneously ensures the sealing performance of the floater to be 1.0 multiplied by 10 from the original structure^-9Pa·m³The leakage rate level of/s is improved to 5.0 multiplied by 10^-10Pa·m³The safety margin of the product is improved; in the actual production of products, the one-time assembly sealing qualified rate of the floater is improved to more than 90 percent from 65 percent of the original structure, the repair cost is greatly reduced, and the productivity and the production efficiency are improved; and the risk of bubbles and seepage caused by micro leakage of the floater is reduced, and the long-term precision and reliability of the instrument are improved.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.