Rotary speed reducer and heliostat

Abstract

The application provides a rotary speed reducer and a heliostat, comprising: a driving motor; a clutch assembly, a first end of which is in transmission connection with an output shaft of the driving motor; a transmission assembly, in transmission connection with a second end of the clutch assembly; wherein the second end of the clutch assembly is provided with a first limiting position and a second limiting position in communication with each other, and the clutch assembly is configured in a transmission configuration and a clutch configuration; in the transmission configuration, the clutch assembly is connected with the transmission assembly through the first limiting position, and the clutch assembly is configured to be pre-compressed so that a relative friction force is generated between the clutch assembly and the transmission assembly, the relative friction force being greater than a driving force output by the output shaft of the driving motor to the clutch assembly in normal transmission; when the transmission assembly is blocked, the driving force output by the output shaft of the driving motor to the clutch assembly gradually increases to be greater than the relative friction force, the clutch assembly is out of the transmission relationship with the output shaft of the driving motor, and the clutch assembly is switched to the clutch configuration.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of solar thermal power generation, and particularly relates to a rotary speed reducer and a heliostat. BACKGROUND

[0002] A tower type solar thermal power station uses a directional reflector (heliostat) to reflect and concentrate sunlight into a central heat exchanger (heat absorber) to convert energy for power generation. To ensure the utilization efficiency of solar energy, the heliostat realizes sun tracking through multi-axis rotation, including pitch, azimuth and roll angles. The rotary speed reducer is generally used to drive the heliostat in the azimuth direction, and ensuring the continuous and normal operation of the motor driving the rotary speed reducer plays an important role in the stability of the heliostat system.

[0003] The solar thermal power station is usually located in an environment with high solar energy resources and strong wind and sand. Due to the long-term effects of adverse environments such as wind and sand and low temperature, the transmission structure between the motor and the worm and the stable operation of the heliostat sun tracking function have great challenges. SUMMARY

[0004] To solve the above problems, the purpose of the present application is to provide a rotary speed reducer and a heliostat. A clutch assembly is arranged between the transmission assembly and the output shaft of the driving motor. When the transmission is blocked, the clutch assembly can automatically disconnect the transmission connection between the transmission assembly and the output shaft of the driving motor, thereby solving the motor locked-rotor problem caused by factors such as wind and sand and low temperature, and ensuring that the motor is not damaged.

[0005] The technical scheme provided by the present application is as follows: a rotary speed reducer, comprising:

[0006] a driving motor;

[0007] a clutch assembly, a first end of which is in transmission connection with the output shaft of the driving motor;

[0008] a transmission assembly, in transmission connection with a second end of the clutch assembly; wherein the second end of the clutch assembly is configured with a first limiting position and a second limiting position which are in communication with each other, and the clutch assembly is configured in a transmission configuration and a clutch configuration;

[0009] In the transmission configuration, the clutch assembly is connected with the transmission assembly through the first limiting position, and the clutch assembly is configured to be pre-compressed to generate a relative friction force between the clutch assembly and the transmission assembly, the relative friction force being greater than the driving force output by the output shaft of the driving motor to the clutch assembly in normal transmission;

[0010] When the transmission assembly is blocked, the driving force output by the driving motor output shaft to the clutch assembly gradually increases to be greater than the relative friction force, the transmission assembly is switched from being connected to the first limit position of the clutch assembly to being connected to the second limit position of the clutch assembly, the clutch assembly simultaneously axially displaces to be out of driving relationship with the driving motor output shaft, and the clutch assembly is switched to a clutching configuration.

[0011] Preferably, the clutch assembly comprises a connecting clutch and a clutch spring, the first end of the connecting clutch is sleeved on the driving motor output shaft, the second end of the connecting clutch is sleeved on the first end of the transmission assembly, a flange is arranged on the outer periphery of the connecting clutch, when the transmission assembly is connected to the first limit position of the connecting clutch, the clutch spring is arranged between the driving motor and the flange and is sleeved on the clutch assembly.

[0012] Preferably, the first limit position and the second limit position are communicated to form an L-shaped key groove, the short side of the L-shaped key groove is the first limit position and extends perpendicularly to the length extension direction of the connecting clutch, the long side of the L-shaped key groove is the second limit position and extends parallel to the length extension direction of the connecting clutch, the distance between the first end face of the first limit position and the first end of the connecting clutch is greater than the distance between the first end face of the second limit position and the first end of the connecting clutch; wherein the first end face of the first limit position is the abutting face closest to the first end of the connecting clutch, and the first end face of the second limit position is the abutting face closest to the first end of the connecting clutch.

[0013] Preferably, in the transmission configuration, the clutch spring is configured to be pre-compressed, so that the first end face of the first limit position elastically abuts against a transmission protrusion of the transmission assembly, and when the driving motor drives the clutch assembly, the relative friction force between the first end face of the first limit position and the transmission protrusion of the transmission assembly drives the transmission assembly to rotate.

[0014] Preferably, the first end of the connecting clutch is provided with an arc-shaped key groove, and the outer wall of the driving motor output shaft is provided with a driving protrusion matched with the arc-shaped key groove.

[0015] Preferably, the transmission assembly comprises a worm and a worm wheel, the outer periphery of the worm is provided with a transmission protrusion, the worm is connected to the connecting clutch through the transmission protrusion, and the worm wheel and the worm are connected through multi-tooth meshing transmission.

[0016] Based on the same concept, the application also provides a heliostat, comprising a heliostat body and the slewing reducer applied to any one of the above-mentioned slewing reducers, and the heliostat body is connected with the power output end of the transmission assembly of the slewing reducer.

[0017] Compared with the prior art, the application has the following advantages and positive effects:

[0018] The clutch assembly is configured to be pre-compressed in the transmission mode, so that the clutch assembly and the transmission assembly are in mutual abutting and pressing state. When the drive motor output shaft rotates, the clutch assembly and the transmission assembly have a tendency to move relatively and generate a relative friction force. When the transmission is not blocked, the relative friction force is greater than the driving force output by the drive motor output shaft to the clutch assembly, so that the clutch assembly and the transmission assembly can remain relatively stationary to realize normal transmission movement. When the transmission assembly is blocked, the clutch assembly still rotates under the drive of the drive motor output shaft, and the torque of the motor relative to the transmission assembly gradually increases until the output torque of the motor is greater than the driving force output by the drive motor output shaft to the clutch assembly, so that the transmission assembly is switched from the first limit position of the clutch assembly to the second limit position of the clutch assembly. At this time, the clutch assembly is axially displaced and disconnected from the drive motor output shaft, and the drive motor output shaft can rotate freely without being blocked. BRIEF DESCRIPTION OF DRAWINGS

[0019] The specific embodiments of the application will be further described in detail below with reference to the accompanying drawings, in which:

[0020] Figure 1 is a sectional view of the slewing reducer of the application;

[0021] Figure 2 is a schematic view of the connecting clutch of the application;

[0022] Figure 3 is a structure diagram of the motor and worm connection in the normal operation state of the application;

[0023] Figure 4 is a structure diagram of the motor and worm connection in the blocked state of the slewing reducer of the application;

[0024] Figure 5 is a schematic view of the heliostat of the application.

[0025] Reference signs:

[0026] 1: heliostat body; 2: slewing reducer; 3: stand; 4: worm; 5: worm gear; 501: transmission protrusion; 6: drive motor; 601: drive protrusion; 7: connecting clutch; 701: first limit position; 702: second limit position; 703: arc-shaped key groove; 8: clutch spring; 9: box. DETAILED DESCRIPTION

[0027] The application will be further described below in conjunction with the drawings and specific embodiments. The advantages and features of the application will be more apparent according to the following description and claims. It should be noted that the drawings are very simplified and all use non-precise ratios, only for the purpose of facilitating, clarifying and assisting in explaining the embodiments of the application.

[0028] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the application are only used to explain the relative position relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications will also change accordingly.

[0029] First embodiment

[0030] The embodiment provides a slewing reducer 2, comprising:

[0031] a drive motor 6;

[0032] a clutch assembly, a first end of which is in transmission connection with an output shaft of the drive motor 6;

[0033] a transmission assembly, a second end of the clutch assembly being in transmission connection with the transmission assembly; wherein the second end of the clutch assembly is configured with a first limit position 701 and a second limit position 702 which are in communication with each other, and the clutch assembly is configured in a transmission configuration and a clutch configuration;

[0034] In the transmission configuration, the clutch assembly is connected with the transmission assembly through the first limit position 701, and the clutch assembly is configured to be pre-compressed so that a relative friction force is generated between the clutch assembly and the transmission assembly, and the relative friction force is greater than a driving force output by the output shaft of the drive motor 6 to the clutch assembly in normal transmission;

[0035] When the transmission assembly is blocked, the driving force output by the output shaft of the driving motor 6 to the clutch assembly gradually increases to be greater than the relative friction force, the transmission assembly is switched from being connected to the first limit position 701 of the clutch assembly to being connected to the second limit position 702 of the clutch assembly, and the clutch assembly simultaneously moves axially to be out of the transmission relationship with the output shaft of the driving motor 6, and the clutch assembly is switched to the clutching configuration.

[0036] The embodiment is configured with the clutch assembly capable of switching between the transmission configuration and the clutching configuration between the output shaft of the driving motor 6 and the transmission assembly. When the transmission is blocked to a certain threshold, the clutch assembly can automatically switch from the transmission configuration to the clutching configuration, so as to be out of the transmission connection relationship, and the motor is prevented from being damaged. Specifically, the core innovation of the embodiment is that, in the transmission configuration, the clutch assembly is configured to be pre-compressed so that the clutch assembly and the transmission assembly are in the mutual abutting and pressing state. When the output shaft of the driving motor 6 rotates, the clutch assembly and the transmission assembly have a tendency to move relatively and generate the relative friction force. When the transmission is not blocked, the relative friction force is greater than the driving force output by the output shaft of the driving motor 6 to the clutch assembly, so that the clutch assembly and the transmission assembly can be relatively stationary to realize normal transmission movement. When the transmission assembly is blocked, the clutch assembly still rotates under the driving of the output shaft of the driving motor 6, and the torque of the motor relative to the transmission assembly gradually increases until the output torque of the motor is greater than the driving force output by the output shaft of the motor to the clutch assembly, so that the transmission assembly is switched from being connected to the first limit position 701 of the clutch assembly to being connected to the second limit position 702 of the clutch assembly, the clutch assembly moves axially to be out of the transmission relationship with the output shaft of the driving motor 6, and the output shaft of the driving motor 6 can be freely rotated without being blocked.

[0037] The embodiment adopts the technical scheme of mechanical direct switching. Compared with the scheme of collecting the output parameters of the motor by a sensor and then judging whether the motor is blocked by software and outputting a control instruction to control the motor to stop rotating, the control means is more direct, almost no intermediate information processing process is needed, and the judgment and transmission connection relationship are directly executed, which is rapid in response and high in reliability. By reasonably selecting the design parameters such as the friction force between the clutch assembly and the transmission assembly, the friction force between the clutch assembly and the transmission assembly can be moderate in normal transmission, which not only ensures the transmission efficiency but also reduces the energy loss. At the same time, the clutching configuration can be switched in time when the transmission assembly is blocked to avoid motor damage.

[0038] Referring to Figure 1Preferably, the clutch assembly comprises a connecting clutch 7 and a clutch spring 8, the first end of the connecting clutch 7 is sleeved on the output shaft of the driving motor 6, the second end of the connecting clutch 7 is sleeved on the first end of the transmission assembly, a flange is arranged on the outer periphery of the connecting clutch 7, and when the transmission assembly is connected with the first limiting position 701 of the connecting clutch 7, the clutch spring 8 is arranged between the driving motor 6 and the flange and is sleeved on the clutch assembly.

[0039] The technical scheme of the embodiment provides a specific implementation of a clutch assembly, which comprises a connecting clutch 7 and a clutch spring 8, a flange is arranged on the outer periphery of the connecting clutch 7, and when the transmission assembly is connected with the first limiting position 701 of the connecting clutch 7, the clutch spring 8 is arranged between the driving motor 6 and the flange in a compressed state, and the elastic force generated by the clutch spring 8 makes the connecting clutch 7 and the transmission assembly press tightly against each other.

[0040] Referring to Figure 2 Preferably, the first limiting position 701 and the second limiting position 702 are communicated to form an L-shaped key groove, the short side of the L-shaped key groove is the first limiting position 701 and extends perpendicularly to the length extension direction of the connecting clutch 7, the long side of the L-shaped key groove is the second limiting position 702 and extends parallel to the length extension direction of the connecting clutch 7, and the distance between the first end face of the first limiting position 701 and the first end of the connecting clutch 7 is greater than the distance between the first end face of the second limiting position 702 and the first end of the connecting clutch 7; wherein the first end face of the first limiting position 701 is the abutting face closest to the first end of the connecting clutch 7, and the first end face of the second limiting position 702 is the abutting face closest to the first end of the connecting clutch 7.

[0041] Referring to Figure 2 The embodiment provides a specific implementation of the first limiting position 701 and the second limiting position 702, the first end face of the first limiting position 701 abuts against the transmission assembly and provides relative friction force for driving transmission, when the transmission assembly is blocked and the connecting clutch 7 is continuously rotated under the driving of the output shaft of the driving motor 6, the transmission assembly falls behind the first limiting position 701 and slides to the second limiting position 702, the elastic force of the clutch spring 8 drives the connecting clutch 7 to move axially, and then the first end of the connecting clutch 7 is disconnected from the transmission relationship with the output shaft of the motor, and the motor is free to rotate. Figure 2, the first end face of the first limiting position 701 is the face of the short side of the L-shaped key groove closest to the connecting clutch 7, and the first end face of the second limiting position 702 is the face of the long side of the L-shaped key groove closest to the connecting clutch 7. Of course, based on the same concept, the key groove including the communication of the first limiting position 701 and the second limiting position 702 can also be other shapes, as long as the switching of the transmission configuration and the clutching configuration can be realized.

[0042] Preferably, in the transmission configuration, the clutch spring 8 is configured to be pre-compressed, so that the first end face of the first limiting position 701 elastically abuts against a transmission protrusion 501 of the transmission assembly, and when the driving motor 6 drives the clutch assembly, the relative friction force between the first end face of the first limiting position 701 and the transmission protrusion 501 of the transmission assembly drives the transmission assembly to rotate.

[0043] The technical scheme of the embodiment is based on the elastic force provided by the pre-compressed clutch spring 8, which makes the first end face of the first limiting position 701 elastically abut against a transmission protrusion 501 of the transmission assembly, and then the relative friction force can be generated to realize effective transmission.

[0044] Preferably, the first end of the connecting clutch 7 is provided with an arc-shaped key groove 703, and the outer wall of the output shaft of the driving motor 6 is provided with a driving protrusion matched with the arc-shaped key groove 703.

[0045] The technical scheme of the embodiment provides a specific implementation of the transmission connection between the connecting clutch 7 and the output shaft of the driving motor 6. The arc-shaped key groove 703 can not only realize transmission connection, but also effectively exit the arc-shaped key groove 703 when the connecting clutch 7 and the output shaft of the driving motor 6 are disconnected.

[0046] Preferably, the transmission assembly includes a worm 5 and a worm wheel 4, the outer periphery of the worm 5 is provided with a transmission protrusion 501, the worm 5 is connected with the connecting clutch 7 through the transmission protrusion 501, and the worm wheel 4 and the worm 5 are connected through multi-tooth meshing transmission.

[0047] The technical scheme of the embodiment provides a component embodiment of the transmission assembly. The multi-tooth meshing transmission connection between the worm 5 and the worm wheel makes the transmission relationship more stable and reliable.

[0048] Referring to Figure 3 and Figure 4 , respectively, the state diagrams between the components in the transmission configuration and the clutching configuration are shown.

[0049] Embodiment Two

[0050] Referring to Figure 5The embodiment provides a heliostat, which comprises a heliostat body 1 and a slewing reducer 2 applied to any one of the above-mentioned slewing reducers.

[0051] The prominent feature is that the slewing reducer 2 in the first embodiment is adopted, and since the solar thermal power station is located in an environment with high solar energy resources and much wind and sand, the heliostat can automatically disconnect the transmission connection between the transmission assembly and the output shaft of the driving motor 6 when the transmission is blocked, thereby solving the motor blocked-rotor problem caused by factors such as wind and sand and low temperature, and ensuring that the motor is not damaged.

[0052] Referring to Figure 1 The slewing reducer is arranged in the slewing reducer box 9.

[0053] The embodiments of the present application are described in detail above with reference to the drawings, but the present application is not limited to the above-mentioned embodiments. Even if various changes are made to the present application, if the changes belong to the scope of the claims of the present application and equivalent technologies thereof, they still fall within the protection scope of the present application.

Claims

1. A slewing reduction gear, characterized in that The utility model relates to a kind of transmission mechanism, including: Driving motor; Clutch assembly, first end is connected with the output shaft of the driving motor; Transmission assembly, the second end of the clutch assembly is connected with the transmission assembly;Wherein, the first limit and the second limit of the clutch assembly are communicated with each other, the clutch assembly is configured as transmission configuration and clutch configuration; Transmission configuration, the clutch assembly is connected with the transmission assembly by the first limit, the clutch assembly is configured as pre-compression to make the relative friction between the clutch assembly and the transmission assembly, the relative friction is greater than the driving force that the driving motor output shaft exports to the clutch assembly when normal transmission; When the transmission assembly is blocked, the driving force that the driving motor output shaft exports to the clutch assembly gradually increases to be greater than the relative friction, the transmission assembly is switched from the first limit of the clutch assembly to the second limit of the clutch assembly, the clutch assembly is simultaneously axially displaced to be disconnected with the driving motor output shaft, the clutch assembly is switched to clutch configuration.

2. The slewing reduction machine of claim 1, wherein The clutch assembly includes a connecting clutch and a clutch spring. The first end of the connecting clutch is sleeved on the output shaft of the driving motor. The second end of the connecting clutch is sleeved on the first end of the transmission assembly. A flange is provided on the outer periphery of the connecting clutch. When the transmission assembly is connected with the first limit of the connecting clutch, the clutch spring is arranged between the driving motor and the flange, and the clutch spring is sleeved on the clutch assembly.

3. The slewing reduction machine of claim 2, wherein, The first limit and the second limit are communicated to form an L-shaped key groove. The short side of the L-shaped key groove is the first limit and extends perpendicular to the length extension direction of the connecting clutch. The long side of the L-shaped key groove is the second limit and extends parallel to the length extension direction of the connecting clutch. The distance between the first end face of the first limit and the first end of the connecting clutch is greater than the distance between the first end face of the second limit and the first end of the connecting clutch. The first end face of the first limit is the abutting face closest to the first end of the connecting clutch, and the first end face of the second limit is the abutting face closest to the first end of the connecting clutch.

4. The slewing reduction machine of claim 3, wherein In transmission configuration, the clutch spring is pre-compressed, so that the first end face of the first limit elastically abuts against a transmission protrusion of the transmission assembly. When the driving motor drives the clutch assembly, the relative friction between the first end face of the first limit and the transmission protrusion of the transmission assembly drives the transmission assembly to rotate.

5. The slewing reduction machine of claim 2, wherein The first end of the connecting clutch is provided with an arc-shaped key groove, and the outer wall of the driving motor output shaft is provided with a driving protrusion matched with the arc-shaped key groove.

6. The slewing reduction machine of claim 2, wherein The transmission assembly includes a worm and a worm gear. The outer periphery of the worm is provided with a transmission protrusion. The worm is connected with the connecting clutch through the transmission protrusion. The worm gear and the worm are connected through multi-tooth meshing transmission.

7. A heliostat, characterized in that, The heliostat body is connected with the power output end of the transmission assembly of the slewing reducer. The heliostat body is connected with the power output end of the transmission assembly of the slewing reducer.

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