A vertical lifting structure and design method thereof

Abstract

The invention discloses a vertical lifting structure and a design method thereof, and belongs to the technical field of lifting drive devices. The structure includes a winch system and a steel wire rope, an annular fixed support base and an annular steel structure located in the fixed support base; the annular steel structure includes a steel inner ring, a steel middle ring and a steel outer ring; the winch system is installed at the bottom of the fixed support base; the bottom of the steel outer ring, the bottom and top of the steel middle ring, and the bottom and top of the steel inner ring are all fixed with pulleys, and the top of the fixed support base is provided with a pulley; one end of the steel wire rope is wound around the winch, and the other end is sequentially passed around the pulley at the top of the fixed support base, the pulley at the bottom of the steel inner ring, the pulley at the top of the steel inner ring, the pulley at the bottom of the steel middle ring, the pulley at the top of the steel middle ring, and the pulley at the bottom of the steel outer ring and fixed at the top of the steel outer ring. The invention ensures that the protective cover is lowered during telescope observation so that the telescope can observe without obstacles, and the steel structure is raised after the observation is completed to protect the telescope.

Description

Technical Field

[0001] The invention relates to the technical field of lifting drive devices, and in particular to a vertical lifting structure and a design method thereof. Background Art

[0002] With the rapid development of modern electronic technology, radio communications, radar technology, and telescope technology, astronomical observation technology and methods have made great progress. As the main astronomical detection tool, the optical telescope has an increasingly larger aperture and higher precision, and its requirements for the working environment are becoming more and more stringent. Therefore, many telescopes now use a protective cover design. As the aperture of the telescope continues to increase, the protective cover is required to be larger and heavier, and the retraction and extension stroke is getting longer. The traditional protective retraction and extension process can no longer meet the requirements. Summary of the invention

[0003] In view of this, the present invention provides a vertical lifting structure and a design method thereof. The structure ensures that the protective cover is lowered during telescope observation so that the telescope can observe without obstacles, and the steel structure is raised after the observation is completed to protect the telescope.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A vertical lifting structure comprises a winch system and a steel wire rope; it also comprises an annular fixed support base and an annular steel structure located inside the fixed support base; the annular steel structure comprises a steel inner ring, a steel middle ring and a steel outer ring with successively decreasing radii; the winch system is installed at the bottom of the fixed support base; pulleys are fixed at the bottom of the steel outer ring, the bottom and top of the steel middle ring, and the bottom and top of the steel inner ring, and a pulley is provided at the top of the fixed support base; one end of the steel wire rope is wound around the winch, and the other end is wound around the pulley at the top of the fixed support base, the pulley at the bottom of the steel inner ring, the pulley at the top of the steel inner ring, the pulley at the bottom of the steel middle ring, the pulley at the top of the steel middle ring, and the pulley at the bottom of the steel outer ring in sequence and is fixed at the top of the steel outer ring.

[0006] Furthermore, it also includes a tension sensor, and a first pulley is also provided at the bottom of the fixed support base; the wire rope between the winch and the pulley at the top of the fixed support base also passes through the tension sensor and bypasses the first pulley.

[0007] Furthermore, the hoist system includes two motors, which are respectively connected to the two ends of the drum and are respectively connected through a brake and a reducer.

[0008] Furthermore, the steel outer ring is also provided with a counterweight for reducing the maximum force on the steel wire rope.

[0009] Furthermore, the outer steel ring moves up and down on the guide rail of the middle steel ring, the middle steel ring moves up and down on the guide rail of the inner steel ring, and the inner steel ring moves up and down on the guide rail of the fixed support base.

[0010] Furthermore, a wire encoder is connected between the top of the steel outer ring and the bottom of the fixed support base; and the wire extension direction of the wire encoder is perpendicular to the bottom surface of the fixed support base.

[0011] Further, a vertical lifting structure as described above is designed, and the specific steps are as follows:

[0012] Step 1: Estimate the number of steel wire ropes N based on the maximum weight G of the steel structure, the position of the center of mass in the steel structure coordinate system (X, Y, Z) and the bearing capacity F of the steel wire ropes. The estimation principle is N>G / F.

[0013] Step 2: After determining the number of steel wire ropes, calculate the parameters of the vertical lifting steel wire rope connection points, that is, the coordinates of the connection points between the steel wire rope and the steel structure in the steel structure coordinate system. i =(X i , Y i , Z i ), where i = 1, 2, 3...N, and the coordinates of the connection points between the wire rope and the fixed support foundation in the geodetic coordinate system, i.e., the coordinates a of the first pulley i =(x i ,y i , z i ), where i = 1, 2, 3...N, and the force f on each wire rope is calculated as the optimization object i , where i = 1, 2, 3,...,N.

[0014] Step 3: Finally, the optimal parameters of the structure are obtained through programming optimization.

[0015] Furthermore, F×N>1.5G.

[0016] Furthermore, the force f on each wire rope is calculated as the optimization object. i ,The specific process is as follows,

[0017] Step 201, establishing a relationship expression between the force f of each steel wire rope and G, (X, Y, Z);

[0018] Step 202, calculate the force f on each wire rope i , and save;

[0019] Step 203, determine the force f i Check whether the steel structure part corresponding to the wire rope is lifted into place;

[0020] Step 204, if the lifting is not in place, repeat step 202;

[0021] Step 205, under the condition that the lifting is in place, the minimum value of the force on each wire rope during the whole lifting process is calculated and saved;

[0022] Step 206, by changing the distribution parameters of the wire rope; repeating steps 202, 203, 204 and 205;

[0023] Step 207, finally, it is concluded that the lifting is in place and the wire rope is subjected to force f i Structural parameters corresponding to the optimal values.

[0024] The beneficial effects of the above technical solution of the present invention are:

[0025] 1. The present invention is lifted by the steel inner ring, the steel outer ring and the steel middle ring, with large lifting force and good lifting effect, ensuring that the protective cover descends during telescope observation so that the telescope can be observed without obstacles. After the observation is completed, the steel structure is lifted to protect the telescope.

[0026] 2. The present invention can not only provide greater force by having dual motors working simultaneously, but the two motors can also serve as backup for each other to ensure the safety of the structure during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 2 is a schematic diagram of a top view of the structure of an embodiment of the present invention.

[0028] Figure 2 It is a cross-sectional schematic diagram of the lifting process of an embodiment of the present invention.

[0029] Figure 3 It is a schematic diagram of the initial state structure of an embodiment of the present invention.

[0030] Figure 4 It is a structural schematic diagram of a winch system according to an embodiment of the present invention.

[0031] Figure 5 It is a flow chart of system parameter optimization according to an embodiment of the present invention.

[0032] In the figure: motor 1-1, motor 2-2, winch system-3, wire rope-4, counterweight-5, pulley-6, steel structure-7, fixed support base-8, fixed pulley-9, follow-up pulley-10, steel outer ring-11, steel middle ring-12, steel inner ring-13, brake 1-14, brake 2-15, reducer 1-16, reducer 2-17, drum-18, tension sensor-19, rope encoder-20. DETAILED DESCRIPTION

[0033] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0035] A vertical lifting structure comprises a winch system and a steel wire rope; it also comprises an annular fixed support base and an annular steel structure located inside the fixed support base; the annular steel structure comprises a steel inner ring, a steel middle ring and a steel outer ring with successively decreasing radii; the winch system is installed at the bottom of the fixed support base; pulleys are fixed at the bottom of the steel outer ring, the bottom and top of the steel middle ring, and the bottom and top of the steel inner ring, and a pulley is provided at the top of the fixed support base; one end of the steel wire rope is wound around the winch, and the other end is wound around the pulley at the top of the fixed support base, the pulley at the bottom of the steel inner ring, the pulley at the top of the steel inner ring, the pulley at the bottom of the steel middle ring, the pulley at the top of the steel middle ring, and the pulley at the bottom of the steel outer ring in sequence and is fixed at the top of the steel outer ring.

[0036] Furthermore, it also includes a tension sensor, and a first pulley is also provided at the bottom of the fixed support base; the wire rope between the winch and the pulley at the top of the fixed support base also passes through the tension sensor and bypasses the first pulley.

[0037] Furthermore, the hoist system includes two motors, which are respectively connected to the two ends of the drum and are respectively connected through a brake and a reducer.

[0038] Furthermore, the steel outer ring is also provided with a counterweight for reducing the maximum force on the steel wire rope.

[0039] Furthermore, the outer steel ring moves up and down on the guide rail of the middle steel ring, the middle steel ring moves up and down on the guide rail of the inner steel ring, and the inner steel ring moves up and down on the guide rail of the fixed support base.

[0040] Furthermore, a wire encoder is connected between the top of the steel outer ring and the bottom of the fixed support base; and the wire extension direction of the wire encoder is perpendicular to the bottom surface of the fixed support base.

[0041] Further, a vertical lifting structure as described above is designed, and the specific steps are as follows:

[0042] Step 1: Estimate the number of steel wire ropes N based on the maximum weight G of the steel structure, the position of the center of mass in the steel structure coordinate system (X, Y, Z) and the bearing capacity F of the steel wire ropes. The estimation principle is N>G / F.

[0043] Step 2: After determining the number of steel wire ropes, calculate the parameters of the vertical lifting steel wire rope connection points, that is, the coordinates of the connection points between the steel wire rope and the steel structure in the steel structure coordinate system. i =(X i , Y i , Z i ), where i = 1, 2, 3...N, and the coordinates of the connection points between the wire rope and the fixed support foundation in the geodetic coordinate system, i.e., the coordinates a of the first pulley i =(x i ,y i , z i ), where i = 1, 2, 3...N, and the force f on each wire rope is calculated as the optimization object i , where i = 1, 2, 3,...,N.

[0044] Step 3: Finally, the optimal parameters of the structure are obtained through programming optimization.

[0045] Furthermore, F×N>1.5G.

[0046] Furthermore, the force f on each wire rope is calculated as the optimization object. i ,The specific process is as follows,

[0047] Step 201, establishing a relationship expression between the force f of each steel wire rope and G, (X, Y, Z);

[0048] Step 202, calculate the force f on each wire rope i , and save;

[0049] Step 203, determine the force f i Check whether the steel structure part corresponding to the wire rope is lifted into place;

[0050] Step 204, if the lifting is not in place, repeat step 202;

[0051] Step 205, under the condition that the lifting is in place, the minimum value of the force on each wire rope during the whole lifting process is calculated and saved;

[0052] Step 206, by changing the distribution parameters of the wire rope; repeating steps 202, 203, 204 and 205;

[0053] Step 207, finally, it is concluded that the lifting is in place and the wire rope is subjected to force f i Structural parameters corresponding to the optimal values.

[0054] The following is a more specific embodiment:

[0055] The present embodiment is further described in detail below by taking a telescope vertical lifting system as an example in conjunction with the accompanying drawings:

[0056] like Figure 1 As shown, a telescope vertical lifting system includes a winch system 3, a wire rope 4, a counterweight 5, a pulley 6, and a steel structure 7. The winch system 3 is connected to the foundation, one end of the wire rope 4 is connected to the fixed foundation 8 through the fixed pulley 9, and the other end is connected to the drum 18 after passing through the follower pulley 10, the tension sensor 19 is installed on the wire rope between the fixed foundation 8 and the fixed pulley 9, the counterweight 5 is connected to the steel structure 7, and the wire encoder 20 is connected between the outer ring 11 of the steel structure and the fixed foundation 8.

[0057] like Figure 2 and 3 As shown, the steel structure 7 is composed of a steel structure outer ring 11, a steel structure middle ring 12 and a steel structure inner ring 13. The number and position of pulleys 6, and the number and position of steel ropes 4 are determined by the maximum weight G of the steel structure, the position of the center of mass in the steel structure coordinate system (X, Y, Z) and the initially selected bearing capacity F of the steel ropes.

[0058] like Figure 4 As shown, the winch drive system 3 is driven by dual motors, one end of which is the motor 1 connected to the drum 18 through the brake 14 and the reducer 16, and the other end of which is the motor 2 connected to the drum 8 through the brake 15 and the reducer 17.

[0059] All the steel wire ropes 4 are finally wound on a drum 18. The fixed end of the steel wire rope 4 is connected to the fixed foundation 8 through a tension sensor 19. The weight of the counterweight 5 is less than the weight of the inner ring 13 of the steel structure. A wire encoder 20 is connected between the outer ring 11 of the steel structure and the fixed foundation 8. The three-circle lifting process of the vertical lifting system is: the outer ring 11 of the steel structure, the middle ring 12 of the steel structure and the inner ring 13 of the steel structure.

[0060] In this embodiment, the number of steel wire ropes N is estimated based on the maximum weight G of the steel structure, the position of the center of mass in the steel structure coordinate system (X, Y, Z) and the initially selected steel wire rope bearing capacity F. The estimation principle is F×N>G, and generally a 1.5-2 times margin is left. After determining the number of steel wire ropes, the parameters of the connection points of the vertical lifting steel wire ropes, i.e., the coordinates B of each connection point between the steel wire rope and the steel structure in the steel structure coordinate system, are calculated. i =(X i , Y i , Z i ), where i = 1, 2, 3...N, and generally a 1.5-2 times margin is left.

[0061] After determining the number of steel wire ropes, the parameters of the vertical lifting steel wire rope connection points, that is, the coordinates of the connection points between the steel wire rope and the steel structure in the steel structure coordinate system, are calculated. i =(x i ,y i , zi ), where i = 1, 2, 3...N, a total of 6N parameters, are used as optimization objects, and the force f on each wire rope is calculated through the kinematic calculation equation i , where i = 1, 2, 3...N. Finally, the optimal parameters of the system structure are obtained through programming optimization. The system parameter optimization process is as follows Figure 5 shown.

Claims

1. A vertical lifting structure, comprising a winch system and a wire rope; characterized in that: It also includes an annular fixed support foundation and an annular steel structure located inside the fixed support foundation; the annular steel structure includes a steel inner ring, a steel middle ring and a steel outer ring with successively decreasing radii; the hoist system is installed at the bottom of the fixed support foundation; pulleys are fixed at the bottom of the steel outer ring, the bottom and top of the steel middle ring, and the bottom and top of the steel inner ring, and a pulley is provided at the top of the fixed support foundation; one end of the steel wire rope is wound around the hoist, and the other end is wound around the pulley at the top of the fixed support foundation, the pulley at the bottom of the steel inner ring, the pulley at the top of the steel inner ring, the pulley at the bottom of the steel middle ring, the pulley at the top of the steel middle ring, and the pulley at the bottom of the steel outer ring in sequence and is fixed at the top of the steel outer ring; The steel outer ring moves up and down on the guide rail of the steel middle ring, the steel middle ring moves up and down on the guide rail of the steel inner ring, and the steel inner ring moves up and down on the guide rail of the fixed support base; the top of the steel middle ring, the top of the steel inner ring and the top of the fixed support base are all provided with limit blocks, which are respectively used to limit the rising height of the steel outer ring, the steel middle ring and the steel inner ring; it also includes a tension sensor, and the bottom of the fixed support base is also provided with a first pulley; the wire rope between the winch and the pulley at the top of the fixed support base also passes through the tension sensor and bypasses the first pulley; the winch system includes two motors, the two motors are respectively connected to the two ends of the drum, and are both connected through a brake and a reducer.

2. A vertical lifting structure according to claim 1, characterized in that: A wire encoder is connected between the top of the steel outer ring and the bottom of the fixed support base; the wire extension direction of the wire encoder is perpendicular to the bottom surface of the fixed support base.

3. A design method for a vertical lifting structure, characterized in that: Design a vertical lifting structure as described in any one of claims 1 to 2, and the specific steps are as follows: Step 1: Estimate the number of steel wire ropes N based on the maximum weight G of the steel structure, the position of the center of mass in the steel structure coordinate system (X, Y, Z) and the bearing capacity F of the steel wire ropes. The estimation principle is N>G / F. Step 2: After determining the number of steel wire ropes, calculate the parameters of the vertical lifting steel wire rope connection points, that is, the coordinates of the connection points between the steel wire rope and the steel structure in the steel structure coordinate system. i =(X i , Y i , Z i ), where i = 1, 2, 3...N, and the coordinates of the connection points between the wire rope and the fixed support foundation in the geodetic coordinate system, i.e., the coordinates a of the first pulley i =(x i ,y i , z i ), where i = 1, 2, 3...N, and the force f on each wire rope is calculated as the optimization object i , where i = 1, 2, 3, · · · N; Step 3: Finally, the optimal parameters of the structure are obtained through programming optimization.

4. The design method of a vertical lifting structure according to claim 3, characterized in that: F×N>1.5G.

5. The design method of a vertical lifting structure according to claim 3, characterized in that: The force f on each wire rope is calculated as the optimization object. i ,The specific process is as follows, Step 201, establish the force f of each wire rope i The relational expression with G, (X, Y, Z); Step 202, calculate the force f on each wire rope i , and save; Step 203, determine the force f i Check whether the steel structure part corresponding to the wire rope is lifted into place; Step 204, if the lifting is not in place, repeat step 202; Step 205, under the condition that the lifting is in place, the minimum value of the force on each wire rope during the whole lifting process is calculated and saved; Step 206, by changing the distribution parameters of the wire rope; repeating steps 202, 203, 204 and 205; Step 207, finally, it is concluded that the lifting is in place and the wire rope is subjected to force f i Structural parameters corresponding to the optimal values.

Images