Foundation solar telescope thermal control motor vibration isolation device

Abstract

The invention relates to a foundation solar telescope thermal control motor vibration isolation device, which comprises a vibration isolation unit, a pressure spring, a tension spring and a connecting unit, and is characterized in that the vibration isolation unit is connected with the connecting unit through the pressure spring and the tension spring; one end of each tension spring is fixed to the upper surface of the vibration isolation plate through a short stand column fixing screw and a short fixing stand column, the other end of each tension spring is fixed to the upper surface of the fixing plate through a long stand column fixing screw and a long fixing stand column, and every two adjacent tension springs share one set of long stand column fixing screws and long fixing stand columns. Therefore, vertical connection between the vibration isolation plate and the fixing plate is realized; the pressing spring positioning stand columns penetrate through the pressing springs located on the upper side and the lower side of the vibration isolation plate, and one pressing spring positioning stand column is arranged between every two adjacent short fixing stand columns. The vibration isolation device is compact in structure, eccentric design is adopted, and collision and impact between the motor and the primary mirror chamber caused by space limitation in the primary mirror chamber are avoided.

Description

Technical Field

[0001] The invention belongs to the field of vibration suppression of ground-based solar telescopes, and in particular relates to a vibration isolation device for a thermal control motor of a ground-based solar telescope, which is used for suppressing the influence of the vibration of the thermal control motor on the imaging of the solar telescope. Background Art

[0002] As the aperture of ground-based solar telescopes continues to increase, the heat load they receive is also increasing, so thermal control technology is extremely important for large-aperture solar telescopes. During the operation of the thermal control system, the vibrations generated by the motors and other devices that control the fluid will inevitably be transmitted to the mirror of the solar telescope, which will cause the mirror to vibrate and affect the imaging quality of the telescope. Therefore, vibration suppression is particularly important for large-aperture solar telescopes.

[0003] The current vibration isolation devices are mainly divided into active vibration isolation devices and passive vibration isolation devices. Active vibration isolation devices use actuators that can be actively controlled to control stiffness and damping to reduce the transmission of vibrations in wide bands and at multiple frequency points, thereby achieving the purpose of suppressing vibrations; passive vibration isolation devices use devices such as springs and rubber pads to reduce the transmission of vibrations. The vibration of the motor of the thermal control system of a solar telescope during operation is usually a single frequency vibration within a narrow frequency band. The motor that controls the airflow of the thermal control system is usually installed inside the main mirror chamber, and the space of the main mirror chamber is small. The active control vibration isolation device has a complex structure, heavy weight and large volume, so this type of vibration isolation device is not applicable; the use of passive vibration isolation devices cannot meet the requirements. Therefore, it is necessary to design a vibration isolation device to reduce the vibration transmission of the thermal control system, and it can be suitable for the small space of the main mirror chamber to meet the imaging quality requirements of the solar telescope. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a vibration isolation device for a thermal control motor of a ground-based solar telescope. The fixed unit and the vibration isolation unit of the vibration isolation device are flexibly connected by a compression spring and a tension spring. The fixed unit is fixed on the solar telescope, and the motor is fixed on the vibration isolation unit. The vibration generated by the motor is transmitted to the vibration isolation unit, and then transmitted to the fixed unit through the compression spring and the tension spring, and then transmitted to the telescope. Compared with the motor being directly fixed on the telescope, the vibration isolation device can weaken the transmission of the motor vibration, reduce the shaking of the telescope primary mirror caused by the motor vibration, and thus reduce the influence of the motor vibration on the imaging of the telescope.

[0005] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0006] A vibration isolation device for a thermal control motor of a ground-based solar telescope, the device comprising a vibration isolation unit, a compression spring, a tension spring and a connection unit, wherein the vibration isolation unit is connected to the connection unit via the compression spring and the tension spring;

[0007] The vibration isolation unit includes a vibration isolation plate, a short column fixing screw, and a short fixed column; the connection unit includes a fixing plate, a long column fixing screw, a long fixed column, and a compression spring positioning column;

[0008] One end of the tension spring is fixed to the upper surface of the vibration isolation plate by means of a short column fixing screw and a short fixed column, and the other end is fixed to the upper surface of the fixed plate by means of a long column fixing screw and a long fixed column, wherein every two adjacent tension springs share a set of long column fixing screws and a long fixed column, thereby realizing the upper and lower connection between the vibration isolation plate and the fixed plate;

[0009] The compression spring positioning column passes through the compression springs located on the upper and lower sides of the vibration isolation plate, and one compression spring positioning column is arranged between every two adjacent short fixed columns.

[0010] Furthermore, the fixing plate is connected to the solar telescope, and the vibration isolation unit also includes a motor connecting plate connected to the motor, and the center line of the bolt through hole connecting the fixing plate to the solar telescope and the center line of the threaded hole connecting the motor connecting plate to the motor are not on the same cylindrical surface.

[0011] Furthermore, the compression springs located on the upper and lower sides of the vibration isolation plate are fixed and pre-tightened by compression spring pre-tightening screws, the compression spring on the upper side of the vibration isolation plate applies elastic force to the spring fixing column and the upper surface of the vibration isolation plate, and the lower side compression spring applies elastic force to the lower surface of the vibration isolation plate and the fixing plate, so that the vibration isolation unit and the connecting unit are in a flexible connection state.

[0012] Furthermore, the number of the compression springs located on the upper and lower sides of the vibration isolation plate is equal.

[0013] Furthermore, the compression spring positioning columns include a plurality of columns that are evenly distributed on the vibration isolation plate.

[0014] Furthermore, the number of the tension springs is 4, 6, ..., 2n, the number of the short fixed columns is 4, 6, ..., 2n, and the number of the long fixed columns is 2, 3, ..., n.

[0015] Furthermore, the compression spring is a compression spring with a circular cross-section, a compression spring with a rectangular cross-section, a compression spring with other polygonal cross-sections, and a wave compression spring.

[0016] Furthermore, the cross-sectional profiles of the fixing plate and the motor connecting plate are circular and polygonal.

[0017] The beneficial effects of the present invention are:

[0018] (1) Eccentric design to avoid impact: The space inside the primary mirror chamber of a solar telescope is limited. The motor of the thermal control system is very close to the edge of the primary mirror chamber. The inner wall of the primary mirror chamber of the telescope is an inverted cone. If the vibration isolation device is installed so that the motor moves downward too much, the motor will collide with the inner wall of the primary mirror chamber and cause an impact. The vibration isolation device of the present invention has a compact structure. After installation, the motor deflects downward very little. In addition, an eccentric design is adopted. After installation, the motor deflects inward along the radial direction of the telescope to avoid collision with the inner wall of the primary mirror chamber.

[0019] (2) Simple structure and light weight: Compared with the active control vibration isolation device, the vibration isolation device in the present invention has a simple structure and does not require an external circuit or air path. It is small in size and will not interfere with the cables and other structures in the main mirror chamber. In addition, the vibration isolation device is light in weight and will not introduce excessive mechanical stress.

[0020] (3) Strong applicability and reconfigurability: For motors of different weights and different operating frequencies, vibration isolation can be achieved by selecting compression springs and tension springs with different stiffness. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a vibration isolation device for a thermal control motor of a ground-based solar telescope according to the present invention;

[0022] Figure 2 It is a decomposition diagram of the vibration isolation unit;

[0023] Figure 3 is a decomposition diagram of the connection unit;

[0024] Figure 4 This is a schematic diagram of the compression spring installation;

[0025] Figure 5 It is a schematic lateral installation diagram of a vibration isolation device for a thermal control motor of a ground-based solar telescope according to the present invention;

[0026] Figure 6 The present invention is a schematic bottom view of the installation of a thermal control motor vibration isolation device for a ground-based solar telescope.

[0027] Reference numerals:

[0028] 1. Vibration isolation unit, 101. Vibration isolation plate, 102. Connecting block, 103. Motor connecting plate, 104. Short column fixing screws, 105. Short fixed column, 106. Lower connecting screws, 107. Upper connecting screws, 2. Compression spring, 3. Tension spring, 4. Connecting unit, 401. Compression spring pre-tightening screw, 402. Compression spring positioning column, 403. Fixing plate, 404. Long column fixing screws, 405. Long fixed column, 5. Motor, 6. Main mirror, 7. Main mirror chamber, 8. Main mirror chamber back plate. DETAILED DESCRIPTION

[0029] The invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] like Figure 1 As shown, a vibration isolation device for a thermal control motor of a ground-based solar telescope of the present invention comprises: a vibration isolation unit 1, a compression spring 2, a tension spring 3 and a connection unit 4.

[0031] like Figure 2 As shown, the vibration isolation unit 1 includes: a vibration isolation plate 101, a connecting block 102, a motor connecting plate 103, a short column fixing screw 104, a short fixing column 105, a lower connecting screw 106 and an upper connecting screw 107, wherein the vibration isolation plate 101, the connecting block 102 and the motor connecting plate 103 arranged in sequence from top to bottom are connected as a whole by the lower connecting screw 106 and the upper connecting screw 107.

[0032] like Figure 3 As shown, the connection unit 4 includes: a compression spring pre-tightening screw 401 , a compression spring positioning column 402 , a fixing plate 403 , a long column fixing screw 404 and a long fixing column 405 .

[0033] The cross-sectional profile of the fixing plate 403 and the motor connecting plate 103 is a hollow circle or polygon.

[0034] like Figure 1 As shown, the connection unit 4 and the vibration isolation unit 1 are connected through the compression spring 2 and the tension spring 3, one end of the tension spring 3 is fixed to the vibration isolation plate 101 through the short column fixing screw 104 and the short fixed column 105, and the other end is fixed to the fixed plate 403 through the long column fixing screw 404 and the long fixed column 405, wherein every two adjacent tension springs 3 share a set of long column fixing screws 404 and long fixed column 405, thereby realizing the connection between the vibration isolation plate 101 and the fixed plate 403, under the elastic force of the tension spring 3, the relative position of the vibration isolation plate 101 and the fixed plate 403 will be stabilized in a balanced state, the number of tension springs 3 is 4, 6, ..., 2n, the corresponding number of short fixed columns 105 is 4, 6, ..., 2n, and the number of long fixed columns 405 is 2, 3, ..., n. In this embodiment, the number of tension springs 2 is 6, the number of short fixed columns 105 is 6, and the number of long fixed columns 405 is 3.

[0035] like Figure 4As shown in the present embodiment, the number of compression springs 2 connected in series with a single compression spring positioning column 402 is an integer multiple of 2, which are divided into two groups and are respectively located on the upper and lower sides of the vibration isolation plate 101. The number of compression spring positioning columns 402 is 2, 3, ..., N, which are evenly distributed on the vibration isolation plate 101. The vibration isolation plate 101 and the fixed plate 403 are connected by compression spring pre-tightening screws 401. The compression spring 2 is a circular cross-section compression spring, a rectangular cross-section compression spring, other polygonal cross-section compression springs, and a wavy compression spring. In the present embodiment, the number of compression springs 2 connected in series with a single compression spring positioning column 402 can be 2, and the number of compression spring positioning columns 402 is 3.

[0036] The compression spring pre-tightening screw 401 is used to fix and apply pre-tightening force. At this time, the compression spring 2 is in a compressed state and will apply elastic force to the contact objects at both ends. The upper compression spring 2 will apply elastic force to the compression spring positioning column 402 and the upper surface of the vibration isolation plate 101, and the lower compression spring 2 will apply elastic force to the fixed plate 403 and the lower surface of the vibration isolation plate 101. The vibration isolation plate 101 is stabilized between the compression spring positioning column 402 and the fixed plate 403 by the elastic force of the compression springs on both sides. The vibration isolation plate 101, the connecting block 102 and the motor connecting plate 103 are connected as a whole by screws. The vibration isolation unit 1 and the connecting unit 4 are flexibly connected by the compression spring 2 and the tension spring 3.

[0037] like Figure 5 and Figure 6 As shown, the vibration isolation device is installed on the back plate 8 of the main mirror chamber of the solar telescope. Because the space inside the main mirror chamber 7 is compact and the main mirror chamber 7 is an inverted cone. The vibration isolation device is designed eccentrically, that is, the vibration isolation unit 1 and the connecting unit 4 are not coaxial, and the axes of the six bolt through holes connected to the fixed plate 403 and the telescope and the axes of the six threaded holes connected to the motor connecting plate 103 and the motor are not on the same cylindrical surface, which causes the motor 5 to shift before and after the vibration isolation device is installed. During installation, the angle at which the connecting unit 4 is installed on the back plate 8 of the main mirror chamber should be adjusted so that the vibration isolation unit 4 is offset inward along the radial direction of the telescope to avoid collision and impact between the motor 5 and the inner wall of the main mirror chamber 7.

[0038] Combination Figure 1 and Figure 5The connection unit 4 is fixed to the solar telescope through the fixing plate 403, and then the motor is fixed to the motor connection plate 103 of the vibration isolation unit 1. When the motor 5 is working, the vibration generated by it will be transmitted to the vibration isolation unit 1 through the motor connection plate 103, and then transmitted to the connection unit 4 through the compression spring 2 and the tension spring 3, and then transmitted to the telescope through the fixing plate 403. The design parameters of the compression spring 2 and the tension spring 3 are designed according to the weight and working frequency of the motor 5. For motors 5 of different weights and different working frequencies, the vibration isolation effect can be achieved by selecting compression springs and tension springs of different stiffness. The vibration isolation device can effectively reduce the vibration transmitted from the motor 5 to the telescope, reduce the shaking of the telescope primary mirror 6, and thus reduce the influence of the motor vibration on the imaging of the telescope.

[0039] During operation, the fluid controlled by the motor 5 can pass through the ventilation hole in the middle of the vibration isolation device, thereby cooling the primary mirror 6, thereby playing a vibration suppression role while ensuring the thermal control effect.

[0040] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A vibration isolation device for a thermal control motor of a ground-based solar telescope, characterized in that: The device comprises a vibration isolation unit, a compression spring, a tension spring and a connection unit, wherein: The vibration isolation unit is connected to the connection unit through a compression spring and a tension spring; The vibration isolation unit includes a vibration isolation plate, a short column fixing screw, and a short fixed column; the connection unit includes a fixing plate, a long column fixing screw, a long fixed column, and a compression spring positioning column; One end of the tension spring is fixed to the upper surface of the vibration isolation plate by means of a short column fixing screw and a short fixed column, and the other end is fixed to the upper surface of the fixed plate by means of a long column fixing screw and a long fixed column, wherein every two adjacent tension springs share a set of long column fixing screws and a long fixed column, thereby realizing the upper and lower connection between the vibration isolation plate and the fixed plate; The compression spring positioning column passes through the compression springs located on the upper and lower sides of the vibration isolation plate, and one compression spring positioning column is arranged between every two adjacent short fixed columns.

2. A ground-based solar telescope thermal control motor vibration isolation device according to claim 1, characterized in that: The fixing plate is connected to the solar telescope, and the vibration isolation unit also includes a motor connecting plate connected to the motor. The center line of the bolt through hole connecting the fixing plate to the solar telescope and the center line of the threaded hole connecting the motor connecting plate to the motor are not on the same cylindrical surface.

3. The ground-based solar telescope thermal control motor vibration isolation device according to claim 1, characterized in that: The compression springs located on the upper and lower sides of the vibration isolation plate are fixed and pre-tightened by compression spring pre-tightening screws, and the compression springs on the upper side of the vibration isolation plate apply elastic force to the spring fixing column and the upper surface of the vibration isolation plate, and the lower side compression springs apply elastic force to the lower surface of the vibration isolation plate and the fixing plate, so that the vibration isolation unit and the connecting unit are in a flexible connection state.

4. The ground-based solar telescope thermal control motor vibration isolation device according to claim 1, characterized in that: The number of the compression springs located on the upper and lower sides of the vibration isolation plate is equal.

5. The vibration isolation device for thermal control motor of ground-based solar telescope according to claim 1, characterized in that: The compression spring positioning columns include a plurality of columns that are evenly distributed on the vibration isolation plate.

6. The ground-based solar telescope thermal control motor vibration isolation device according to claim 1, characterized in that The number of the tension springs is 4, 6, ..., 2n, the number of the short fixed columns is 4, 6, ..., 2n, and the number of the long fixed columns is 2, 3, ..., n.

7. The ground-based solar telescope thermal control motor vibration isolation device according to claim 1, characterized in that The compression spring is a compression spring with a circular cross-section, a compression spring with a rectangular cross-section, a compression spring with other polygonal cross-sections, and a wave compression spring.

8. The ground-based solar telescope thermal control motor vibration isolation device according to claim 1, characterized in that: The cross-sectional profiles of the fixing plate and the motor connecting plate are circular and polygonal.

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