阅读说明：本技术 一种柔性太阳电池翼用长寿命张紧机构 (Long-life tensioning mechanism for flexible solar cell wing ) 是由 宋佳 顾珏华 袁伟 咸奎成 程雷 王治易 张雷 付清山 姬鸣 唐杰 于 2021-06-29 设计创作，主要内容包括：本发明涉及一种柔性太阳电池翼用长寿命张紧机构,包括转轴组件、轴承、接触式平面蜗卷弹簧、壳体组件、绕线轮组件、钢丝绳以及滑轮组件。在柔性太阳电池翼完全展开后,伸展机构带动上箱体继续伸展,将钢丝绳从绕线轮组件上拉出,绕线轮组件旋转、接触式平面蜗卷弹簧卷紧,弹簧扭矩通过转轴组件、绕线轮组件、钢丝绳转化为对柔性太阳电池翼的张紧力,进而保证柔性太阳电池翼具备足够的模态频率。本发明采用接触式平面蜗卷弹簧为展开的柔性太阳电池翼提供张紧力,具备结构简单、运动可靠、工作寿命长、张紧力可调以及质量轻等有益效果,可应用于长期在轨工作的柔性太阳电池翼。(The invention relates to a long-life tensioning mechanism for a flexible solar cell wing, which comprises a rotating shaft assembly, a bearing, a contact type plane spiral spring, a shell assembly, a winding wheel assembly, a steel wire rope and a pulley assembly. After the flexible solar cell wing is completely unfolded, the stretching mechanism drives the upper box body to continue stretching, the steel wire rope is pulled out from the winding wheel assembly, the winding wheel assembly rotates and the contact type plane spiral spring is tightly wound, the spring torque is converted into the tension force of the flexible solar cell wing through the rotating shaft assembly, the winding wheel assembly and the steel wire rope, and then the flexible solar cell wing is guaranteed to have enough modal frequency. The invention adopts the contact type flat spiral spring to provide tension for the unfolded flexible solar cell wing, has the advantages of simple structure, reliable movement, long service life, adjustable tension, light weight and the like, and can be applied to the flexible solar cell wing which works on the orbit for a long time.)

1. A long-life tensioning mechanism for a flexible solar cell wing is characterized by comprising a rotating shaft assembly (1), a bearing (2), a contact type plane spiral spring (3), a shell assembly (4), a reel assembly (5), a steel wire rope (6) and a pulley assembly (7);

the bottom surface of the shell component (4) is arranged on the upper box body of the flexible solar cell wing; the rotating shaft assembly (1) is arranged in the shell assembly (4) through two bearings (2) and can flexibly rotate relative to the shell assembly (4); the inner end of the contact type plane spiral spring (3) is fixedly connected with the middle part of the rotating shaft component (1), and the outer end of the contact type plane spiral spring is fixedly connected with the shell component (4); the winding wheel assembly (5) is fixedly connected with one end of the rotating shaft assembly (1), and the other end of the rotating shaft assembly (1) is connected with a driving mechanism of the rotating shaft assembly (1); the pulley component (7) is arranged on the shell component (4); one end of a steel wire rope (6) is wound and fixed on the winding wheel assembly (5), and the other end of the steel wire rope penetrates through the pulley assembly (7), turns by 90 degrees and then penetrates through the upper box body of the flexible solar cell wing to be connected and fixed with the flexible substrate.

2. The long life tensioning mechanism for a flexible solar cell wing as claimed in claim 1, wherein: before the flexible solar cell wing is completely unfolded, a certain pre-tightening torque exists in the contact type plane spiral spring (3); after the flexible solar cell wing is completely unfolded, the stretching mechanism drives the upper box body to continue stretching, the steel wire rope (6) is pulled out from the winding wheel assembly (5), the winding wheel assembly (5) rotates, the contact type plane spiral spring (3) is wound tightly, and the spring torque is converted into the tension force of the flexible solar cell wing through the rotating shaft assembly (1), the winding wheel assembly (5) and the steel wire rope (6); in the folding process of the flexible solar cell wing, the stretching mechanism drives the upper box body to contract, the contact type plane spiral spring (3) provides power, and the winding wheel assembly (5) rotates reversely and retracts the steel wire rope (6).

3. The long life tensioning mechanism for a flexible solar cell wing as claimed in claim 1, wherein: when the flexible solar cell wing works on the rail, the flexible solar cell wing is in an unfolded state for a long time and is influenced by temperature change, and the steel wire rope (6) is driven by the stretching mechanism to continuously stretch and retract back and forth in a small range; the tensioning mechanism adapts to the reciprocating expansion and contraction of the steel wire rope (6) through the winding up and unwinding reciprocating rotation of the contact type flat spiral spring (3), and further ensures that the flexible solar cell wing always has enough tensioning force.

4. The long life tensioning mechanism for a flexible solar cell wing as claimed in claim 1, wherein: the winding wheel assembly (5) is connected with the rotating shaft assembly (1) through a spline; the relative installation angle of the two is adjusted through the spline, and the pre-twisting angle and the pre-tightening torque of the contact type plane spiral spring (3) are adjusted through rotating the rotating shaft assembly (1) on the premise of not changing the installation angle of the reel assembly (5), so that the tension is adjusted.

5. The long life tensioning mechanism for a flexible solar cell wing as claimed in claim 1, wherein: the rotating shaft assembly (1) comprises a shaft (11) and a coil spring inner end fixing piece (12), one end of the coil spring inner end fixing piece (12) is fixedly connected with the shaft (11) into a whole, and the other end of the coil spring inner end fixing piece is fixedly connected with the inner end of the contact type plane spiral spring (3).

6. The long life tensioning mechanism for a flexible solar cell wing as claimed in claim 1, wherein: the shaft (11) is made of a material with the tensile strength larger than 600Mpa, so that the bearing requirement is met.

7. The long life tensioning mechanism for a flexible solar cell wing as claimed in claim 1, wherein: the inner end fixing piece (12) of the coil spring adopts a density less than or equal to 2.8g/cm³The material of (3) has lower mass while meeting the connection relation with the contact type flat spiral spring (3).

8. The flexible solar power of claim 1The long-life tensioning mechanism for the pool wing is characterized in that the winding wheel assembly (5) comprises a wheel rim (51) and a wheel disc (52), and the wheel rim (51) and the wheel disc (52) are fixedly connected into a whole; the wheel rim (51) is made of a material with the surface hardness of more than or equal to 35 and is used for reducing the abrasion of the rope groove; the wheel disc (52) adopts a wheel disc with the density less than or equal to 2.8g/cm³The material is made, and the material has lower quality while meeting the structural connection relation.

9. The long-life tensioning mechanism for the flexible solar cell wing as claimed in claim 1, wherein the axial direction of the cable-threading hole of the cable-winding wheel assembly (5) forms an angle α with the diameter direction of the wheel disc (52).

10. The long-life tensioning mechanism for the flexible solar cell wing as claimed in claim 1, wherein the range of the certain included angle α is 20-60 °.

Technical Field

The invention relates to a long-life tensioning mechanism for a flexible solar cell wing, which can provide tensioning force for the unfolded flexible solar cell wing and relates to the technical field of space vehicles.

Background

At present, solar cell wings used on spacecraft in China are all rigid or semi-rigid solar cell wings, and the requirements of high-power spacecraft cannot be met due to large furling envelope and limited unfolding area. With the continuous development of the aerospace technology, the flexible solar cell wing with small furling envelope and large output power becomes the development trend of the future high-power solar cell wing.

After the flexible solar cell wing is unfolded, a tensioning mechanism is needed to provide tensioning force for the flexible solar cell wing, and then the flexible solar cell wing is ensured to have enough modal frequency. The flexible solar cell wing working on the rail for a long time can experience complex environmental working conditions such as high-low temperature alternation, rail changing, butt joint and the like, and the tensioning mechanism has long-term stable working performance under the environmental working conditions.

Disclosure of Invention

The technical problem solved by the invention is as follows: the flexible solar cell wing tensioning mechanism has the advantages of simple structure, reliable movement, long service life, adjustable tensioning force, light weight and the like, and can be applied to the flexible solar cell wing working on the rail for a long time.

The technical scheme of the invention is as follows: a long-life tensioning mechanism for a flexible solar cell wing comprises a rotating shaft assembly, a bearing, a contact type plane spiral spring, a shell assembly, a winding wheel assembly, a steel wire rope and a pulley assembly.

The bottom surface of the shell component is arranged on the upper box body of the flexible solar cell wing; the rotating shaft assembly is arranged in the shell assembly through two bearings and can flexibly rotate relative to the shell assembly; the inner end of the contact type plane spiral spring is fixedly connected with the middle part of the rotating shaft assembly, and the outer end of the contact type plane spiral spring is fixedly connected with the shell assembly; the winding wheel assembly is fixedly connected with one end of the rotating shaft assembly, and the other end of the rotating shaft assembly is connected with a driving mechanism of the rotating shaft assembly; the pulley assembly is arranged on the shell assembly; one end of the steel wire rope is wound and fixed on the winding wheel assembly, and the other end of the steel wire rope penetrates through the pulley assembly, turns at 90 degrees and then penetrates through the upper box body of the flexible solar cell wing to be connected and fixed with the flexible substrate;

before the flexible solar cell wing is completely unfolded, the contact type plane spiral spring has certain pre-tightening torque; after the flexible solar cell wing is completely unfolded, the stretching mechanism drives the upper box body to continue stretching, the steel wire rope is pulled out from the winding wheel assembly, the winding wheel assembly rotates and the contact type plane spiral spring is tightly wound, and the spring torque is converted into tension force on the flexible solar cell wing through the rotating shaft assembly, the winding wheel assembly and the steel wire rope; in the folding process of the flexible solar cell wing, the extension mechanism drives the upper box body to contract, and the contact type plane spiral spring provides power to enable the reel assembly to rotate reversely and retract the steel wire rope.

When the flexible solar cell wing works on the rail, the flexible solar cell wing is in an unfolded state for a long time and is influenced by temperature change, and the steel wire rope is driven by the stretching mechanism to continuously stretch and retract back and forth in a small range; the tensioning mechanism adapts to the reciprocating expansion of the steel wire rope through the winding up and unwinding reciprocating rotation of the contact type flat spiral spring, so that the flexible solar cell wing is ensured to have enough tensioning force all the time.

The winding wheel assembly is connected with the rotating shaft assembly through a spline; the relative installation angle between the two is adjusted through the spline, and under the prerequisite that does not change reel subassembly installation angle, the pretwist angle and the pretension moment of torsion of contact plane spiral spring are adjusted through rotating the pivot subassembly, and then realize the regulation of tensile force.

The rotating shaft assembly comprises a shaft and a coil spring inner end fixing piece, one end of the coil spring inner end fixing piece is fixedly connected with the shaft into a whole, and the other end of the coil spring inner end fixing piece is fixedly connected with the inner end of the contact type plane spiral spring.

The shaft is made of a material with the tensile strength larger than 600Mpa and is used for meeting the bearing requirement.

The inner end fixing piece of the coil spring adopts a density less than or equal to 2.8g/cm³The material of (2) has lower mass while meeting the connection relation with the contact type flat spiral spring.

The reel assembly comprises a rim and a wheel disc which are fixedly connected into a whole; the wheel rim is made of a material with the surface hardness of more than or equal to 35 so as to reduce the abrasion of the rope groove; the wheel disc has density less than or equal to 2.8g/cm³The material is made, and the material has lower quality while meeting the structural connection relation.

And a certain included angle alpha exists between the axis direction of the rope threading hole and the diameter direction of the wheel disc of the winding wheel assembly.

The range of the certain included angle alpha is 20-60 degrees.

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

(1) the invention adopts the contact type flat spiral spring to provide tension for the unfolded flexible solar cell wing, and has the advantages of simple structure, reliable movement and the like.

(2) The easy-to-wear part adopts the contact type flat spiral spring and the steel wire rope, the fatigue life of which is not less than 80 ten thousand times, and the easy-to-wear part has the beneficial effect of long service life.

(3) According to the invention, the winding wheel assembly and the rotating shaft assembly are connected by the spline, and the relative installation angle of the winding wheel assembly and the rotating shaft assembly is adjustable, so that the pre-tightening torque of the contact type plane spiral spring is adjustable, and the beneficial effect of adjustable tensioning force is achieved.

(4) According to the invention, the rotating shaft assembly and the reel assembly are designed in a split mode, different materials are used for different working parts, so that reasonable distribution of mass is realized, and the rotary reel assembly has the beneficial effect of light mass.

Drawings

FIG. 1 is a perspective view of the structural components of a long life tensioning mechanism of an embodiment of the present invention;

FIG. 2 is a cross-sectional view of the long life tensioning mechanism of an embodiment of the present invention;

FIG. 3 is a schematic view of the installation layout of a long life tensioning mechanism on a flexible solar cell wing according to an embodiment of the present invention;

FIG. 4 is a schematic view of a splined connection between a reel assembly and a spindle assembly in accordance with an embodiment of the present invention;

FIG. 5 is a schematic diagram of a split design of a spindle assembly according to an embodiment of the present invention;

FIG. 6 is a schematic view of a split design of a reel assembly in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view showing the direction of a stringing hole of a reel assembly according to an embodiment of the present invention;

FIG. 8 is a free state diagram of a long life planar volute spring according to an embodiment of the present invention;

FIG. 9 is a schematic view of the operation of a long life flat spiral spring according to an embodiment of the present invention;

fig. 10 is a perspective view of the structural configuration of a long life sheave assembly in accordance with an embodiment of the present invention;

fig. 11 is a cross-sectional view of the construction of a long life sheave assembly in accordance with an embodiment of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The invention aims to solve the problem of tension application of a flexible solar cell wing working on orbit for a long time, and provides a long-life tensioning mechanism for the flexible solar cell wing, which provides tension for the flexible solar cell wing after the flexible solar cell wing is unfolded and can bear long-term alternating fatigue load.

The invention provides a long-life tensioning mechanism for a flexible solar cell wing, which comprises a rotating shaft assembly 1, a bearing 2, a contact type flat spiral spring 3, a shell assembly 4, a reel assembly 5, a steel wire rope 6 and a pulley assembly 7.

The bottom surface of the shell component 4 is arranged on the upper box body of the flexible solar cell wing; the rotating shaft assembly 1 is arranged in the shell assembly 4 through two bearings 2 and can flexibly rotate relative to the shell assembly 4; the inner end of the contact type plane spiral spring 3 is fixedly connected with the middle part of the rotating shaft component 1, and the outer end is fixedly connected with the shell component 4; the reel assembly 5 is fixedly connected with one end of the rotating shaft assembly 1, and the other end of the rotating shaft assembly 1 is connected with a driving mechanism of the rotating shaft assembly 1; the pulley assembly 7 is arranged on the shell assembly 4; one end of a steel wire rope 6 is wound and fixed on the winding wheel assembly 5, and the other end of the steel wire rope penetrates through the pulley assembly 7, is turned for 90 degrees and then penetrates through the upper box body of the flexible solar cell wing to be connected and fixed with the flexible substrate.

Before the flexible solar cell wing is completely unfolded, the contact type plane spiral spring 3 has certain pre-tightening torque; after the flexible solar cell wing is completely unfolded, the stretching mechanism drives the upper box body to continue stretching, the steel wire rope 6 is pulled out from the winding wheel assembly 5, the winding wheel assembly 5 rotates, the contact type plane spiral spring 3 is tightly wound, and the spring torque is converted into the tension force of the flexible solar cell wing through the rotating shaft assembly 1, the winding wheel assembly 5 and the steel wire rope 6; in the folding process of the flexible solar cell wing, the extension mechanism drives the upper box body to contract, the contact type plane spiral spring 3 provides power, the winding wheel assembly 5 rotates reversely, and the steel wire rope 6 is retracted.

When the flexible solar cell wing works on the rail, the flexible solar cell wing is in an unfolded state for a long time, is influenced by temperature change, and is driven by the steel wire rope 6 through the stretching mechanism to continuously stretch and retract back and forth within a small range, wherein the small range is generally within the range of [ -100mm, 100mm ]; the tensioning mechanism adapts to the reciprocating expansion of the steel wire rope 6 through the winding up and unwinding reciprocating rotation of the contact type flat spiral spring 3, and therefore the flexible solar cell wing is guaranteed to have enough tensioning force all the time. When the rail is changed and the butt joint is carried out, the steel wire rope 6 can also stretch out and draw back in a small range under the driving of the stretching mechanism.

The fatigue life of the contact type flat spiral spring in reciprocating rotation is not less than 80 ten thousand times; when the steel wire rope stretches and retracts in a reciprocating mode, the steel wire rope passes through the pulley assembly and the reel assembly, and the fatigue life of the steel wire rope which is bent on the two wheels in a reciprocating mode is not less than 80 ten thousand times; the flexible solar cell wing long-service-life tensioning mechanism is ensured to have stable performance in long-term on-orbit operation through the characteristics.

Preferably, the reel assembly 5 and the rotating shaft assembly 1 are in spline connection; the relative installation angle of the two is adjusted through the spline, and the pre-twisting angle and the pre-tightening torque of the contact type plane spiral spring 3 are adjusted through rotating the rotating shaft assembly 1 on the premise of not changing the installation angle of the reel assembly 5, so that the adjustment of the tensioning force is realized.

The rotating shaft assembly 1 comprises a shaft 11 and a coil spring inner end fixing piece 12, one end of the coil spring inner end fixing piece 12 is fixedly connected with the coil spring inner end fixing piece 12 into a whole, and the other end of the coil spring inner end fixing piece 12 is fixedly connected with the end part of the contact type plane spiral spring 3.

The shaft 11 is made of a material with a tensile strength greater than 600Mpa, such as titanium alloy, stainless steel, etc., so as to meet the load bearing requirement.

The inner end fixing piece 12 of the coil spring adopts a density less than or equal to 2.8g/cm³The material of (3), for example, aluminum alloy, etc., has a low mass while satisfying the connection relationship with the contact type flat spiral spring 3.

The reel assembly 5 comprises a rim 51 and a disc 52 which are fixedly connected into a whole; the wheel rim 51 is made of a material with the surface hardness of more than or equal to 35 and is used for reducing the abrasion of the rope groove; the wheel disc 52 has a density of 2.8g/cm or less³The material, such as aluminum alloy, has low quality while satisfying the structural connection relationship.

In the reel assembly 5, a certain included angle alpha exists between the axis direction of the rope through hole and the diameter direction of the wheel disc 52, so that the steel wire rope 6 has a larger turning radius when passing through the rope through hole and being wound on the wheel rim 51, and the attachment degree of the root of the steel wire rope 6 and the wheel rim 51 is improved.

The range of the certain included angle alpha is 20-60 degrees.

Example (b):

fig. 1 is a perspective view showing a structural composition of a long-life tensioner, and fig. 2 is a sectional view showing a structural composition of a long-life tensioner. The long-life tensioning mechanism comprises a rotating shaft assembly 1, a bearing 2, a contact type plane spiral spring 3, a shell assembly 4, a reel assembly 5, a steel wire rope 6 and a pulley assembly 7. The bottom surface of the shell component 4 is arranged on the upper box body of the flexible solar cell wing; the rotating shaft assembly 1 is arranged in the shell assembly 4 through two bearings 2, and the rotating shaft assembly 1 can flexibly rotate relative to the shell assembly 4; the inner end of the contact type plane spiral spring 3 is connected with the rotating shaft component 1, and the outer end of the contact type plane spiral spring is connected with the shell component 4; the reel assembly 5 is fixedly connected with the rotating shaft assembly 1; the pulley assembly 7 is arranged on the shell assembly 4; one end of the steel wire rope 6 is wound and fixed on the winding wheel assembly 5, and the other end of the steel wire rope penetrates through the pulley assembly 7, turns at 90 degrees and then penetrates through the upper box body to be connected and fixed with the flexible substrate.

Fig. 3 is a schematic view of the installation layout of the long life tensioning mechanism on the flexible solar cell wings. The figure totally comprises 4 sets of long-life tensioning mechanisms which are all arranged on the upper box body of the flexible solar wing. Before the flexible solar cell wing is completely unfolded, the contact type plane spiral spring 3 has certain pre-tightening torque; after the flexible solar cell wing is completely unfolded, the stretching mechanism drives the upper box body to continue stretching, the steel wire rope 6 is pulled out from the winding wheel assembly 5, the winding wheel assembly 5 rotates, the contact type plane spiral spring 3 is tightly wound, and the spring torque is converted into the tension force of the flexible solar cell wing through the rotating shaft assembly 1, the winding wheel assembly 5 and the steel wire rope 6; in the folding process of the flexible solar cell wing, the extension mechanism drives the upper box body to contract, the contact type plane spiral spring 3 provides power, the winding wheel assembly 5 rotates reversely, and the steel wire rope 6 is retracted.

When the flexible solar cell wing works on the rail, the flexible solar cell wing is in an unfolded state for a long time and is influenced by factors such as high and low temperature alternation, rail changing, butt joint and the like, and the steel wire rope 6 is driven by the stretching mechanism to continuously stretch and retract back and forth in a small range; the tensioning mechanism adapts to the reciprocating expansion and contraction of the steel wire rope 6 through the reciprocating rotation (winding and unwinding) of the contact type flat spiral spring 3, so that the flexible solar cell wing is ensured to have enough tensioning force all the time. The fatigue life of the contact type plane spiral spring 3 in reciprocating rotation is not less than 80 ten thousand times; when the steel wire rope 6 stretches and retracts in a reciprocating mode, the steel wire rope passes through the pulley assembly 7 and the reel assembly 5, and the fatigue life of the steel wire rope 6 which bends on the two wheels in a reciprocating mode is not less than 80 ten thousand times; the long-service-life tensioning mechanism is ensured to have stable performance for long-term on-orbit operation through the characteristics.

Fig. 4 is a schematic view of a spline connection between the reel assembly and the rotating shaft assembly. The reel assembly 5 is connected with the rotating shaft assembly 1 through splines; the relative installation angle of the two can be adjusted through the spline, and the pre-twisting angle and the pre-tightening torque of the contact type plane spiral spring 3 can be adjusted through rotating the rotating shaft assembly 1 on the premise of not changing the installation angle of the reel assembly 5, so that the adjustment of the tensioning force is realized.

Fig. 5 is a schematic view of a split design of the spindle assembly. The rotating shaft assembly 1 comprises a shaft 11 and a coil spring inner end fixing piece 12 which are fixedly connected into a whole through a flat key; the shaft 11 is made of a material with high tensile strength to meet the bearing requirement; the inner end fixing piece 12 of the coil spring is made of a material with lower density, and has lower mass while meeting the connection relation with the contact type flat spiral spring 3.

Fig. 6 is a schematic view of a split design of a bobbin assembly. The reel assembly 5 comprises a rim 51 and a wheel disc 52 which are fixedly connected into a whole through screws; the rim 51 is made of a material with higher surface hardness so as to reduce the abrasion of the rope groove; the wheel disc 52 is made of a material with a low density, so that the structural connection relation is met, and meanwhile, the wheel disc has low mass.

Fig. 7 is a schematic view of the direction of the stringing hole of the reel assembly. The axis direction of the rope penetrating hole of the reel component 5 and the diameter direction of the wheel disc 52 form a certain included angle alpha, so that the steel wire rope 6 has a larger turning radius when passing through the rope penetrating hole to be wound on the wheel rim 51, and the attaching degree of the root of the steel wire rope 6 and the wheel rim 51 is improved.

As shown in fig. 8 and 9, the spring type of the long-life flat spiral spring provided by the invention is a contact flat spiral spring, which is S-shaped in a natural state and comprises an inner end 2-1, a forward curvature section 2-2, a reverse curvature section 2-3 and an outer end 2-4; in the working state of the rail, the spring box is coiled inside the circular spring box and is in a spiral line shape, the inner end 2-1 is fixedly connected with the installation mandrel in a hook mode, and the outer end 2-4 is fixedly connected with the spring box through a fastener.

When the ground is assembled and adjusted, the rotating installation mandrel applies a certain pre-tightening torque to the spring; when the rail works, the installation mandrel rotates in a reciprocating manner under the action of external force to drive the spring to rotate in a reciprocating manner in a small range under the pre-tightening state, so that the spring bears reciprocating alternating fatigue load; the shape and size of the spring are matched with those of the installation core shaft, so that the working stress of the spring is low under the working condition of bearing the same fatigue load. The fatigue life of the reciprocating rotation of the long-life planar spiral spring for the space is not less than 80 ten thousand times.

As shown in fig. 10 and 11, the long life rope pulley assembly for space use of the present invention includes a wire rope 3-1, a bracket 3-2, a shaft 3-3, a bearing 3-4, a pulley 3-5, and a protective cover 3-6; wherein:

the shaft 3-3 is fixed on the bracket 3-2; the pulley 3-5 is mounted on the shaft 3-3 through a bearing 3-4, so that the pulley 3-5 can flexibly rotate relative to the shaft 3-3; the periphery of the pulley 3-5 is provided with a rope groove, and the steel wire rope 3-1 is wound on the rope groove on the periphery of the pulley 3-5 to realize 90-degree path steering; the diameter of the steel wire rope is matched with the radius of the pulley, and the minimum breaking force of the steel wire rope is matched with the tensile force borne by the steel wire rope during reciprocating motion, so that the working stress of the steel wire rope is low under the working condition of bearing the same tensile force. The protective cover 3-6 is used for preventing the steel wire rope 3-1 from falling off the rope groove under the influence of space environments such as vibration, rail change, butt joint and the like on the premise of not influencing the normal operation of the steel wire rope 3-1 and the pulley 3-5. When certain tension force is applied to two ends of the steel wire rope 1 and the steel wire rope 1 is pulled to reciprocate around the pulley 5 in the tension state, the fatigue life of the reciprocating motion of the steel wire rope 1 is not less than 80 ten thousand times.

The invention can provide tension for the flexible solar cell wing after the flexible solar cell wing is unfolded, thereby ensuring that the flexible solar cell wing has enough modal frequency; the flexible solar cell wing has the beneficial effects of simple structure, reliable movement, long service life, adjustable tension force, light weight and the like, and can be applied to the flexible solar cell wing working on the orbit for a long time.

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.