Polar high-power pod spindle rotating speed feedback mechanism

Abstract

The invention provides a polar high-power pod spindle speed feedback mechanism, and relates to the technical field of pod spindle detection.The polar high-power pod spindle speed feedback mechanism comprises a pod, an encoder base is installed on the outer side of the position of a spindle of the pod, a conversion shaft is rotationally installed in the middle of the inner side of the encoder base, and the tail end of the conversion shaft is connected with the spindle of the pod; a bearing is arranged in the middle of the conversion shaft, the head end of the conversion shaft is connected with an encoder, and the encoder is located in the middle of the outer side of the encoder base. According to the invention, the encoder is adopted to carry out high-precision rotation speed feedback and angle feedback on the pod main shaft in real time, and accurate signals collected by the encoder are sent to the control system, so that accurate control on the pod motor is realized; on the basis that the encoder is coaxially installed, multiple limiting measures are further arranged, so that the installation of the encoder has vibration resistance, the stability of the encoder working on the pod main shaft for a long time is improved, and damage to the encoder caused by vibration of the pod main shaft is effectively prevented.

Description

Technical Field

[0001] The invention relates to the technical field of pod main shaft detection, in particular to a polar-level high-power pod main shaft speed feedback mechanism. Background Art

[0002] Pod propulsion system is a propulsion method widely used in the fields of ships, aerospace, etc. It generates thrust through the propeller inside the pod, thereby realizing the movement and control of ships or aircraft. In the pod propulsion system, speed regulation is a very important link. It can adjust the propulsion speed by controlling the engine speed, transmission system speed regulation, torque converter speed regulation and electronic control system speed regulation. In the pod propulsion system, engine speed control is achieved by adjusting the output power of the engine. When the propulsion speed needs to be increased, the engine speed can be increased to increase the thrust; when the propulsion speed needs to be reduced, the engine speed can be reduced to reduce the thrust. Engine speed control can usually be achieved through the throttle lever, electronic control system or wave pressure system. In practical applications, real-time feedback of the engine main shaft speed is required to facilitate the control system to accurately control the pod motor.

[0003] The existing scheme generally adopts photoelectric switches, and uses proximity switches through the gear disc on the spindle to record the number of pulses and convert the real-time speed of the spindle. There is a certain error in the existing scheme to measure the spindle speed, and the speed resolution is low. Generally, the number of teeth on a circle of the gear disc is equal to the resolution. This is very different from the absolute encoder's resolution of at least tens of thousands. In addition, the existing scheme cannot measure the change of angle, and cannot meet the polar-level high-power pod's precise feedback requirements for the spindle speed and angle.

[0004] To solve the above problems, we propose a polar-level high-power pod main shaft speed feedback mechanism to solve the above problems. Summary of the invention

[0005] In order to solve the problems in the background technology, the present invention provides a polar-level high-power pod main shaft speed feedback mechanism.

[0006] To achieve the above object, the technical solution adopted by the present invention is: A polar-level high-power pod main shaft speed feedback mechanism comprises a pod, an encoder base is installed on the outer side of the main shaft of the pod, a conversion shaft is rotatably installed in the middle of the inner side of the encoder base, the end of the conversion shaft is connected to the main shaft of the pod, a bearing is arranged in the middle of the conversion shaft, an encoder is connected to the head end of the conversion shaft, and the encoder is located in the middle of the outer side of the encoder base; Preferably, the outer ring of the encoder base is provided with a plurality of groups of elastic mechanisms, and the plurality of groups of elastic mechanisms are distributed in a circular array with the center point of the encoder base.

[0007] Preferably, the elastic mechanism comprises a spring sheet, and the outer ring of the encoder base is connected to the pod via the spring sheet.

[0008] Preferably, the bearing is installed in the middle of the inner side of the encoder base, and the conversion shaft is installed in the inner ring of the bearing.

[0009] Preferably, a damping block with an elastic structure is arranged in the middle of the inner side of the encoder base, and the damping block is distributed on the outer ring of the bearing.

[0010] Compared with the prior art, the present invention has the following beneficial effects: In the scheme of the present invention, by installing the encoder coaxially with the pod main shaft, using the absolute encoder, high-precision speed feedback and angle feedback of the pod main shaft is achieved, and the accurate signal collected by the encoder is sent to the control system, thereby achieving precise control of the pod motor; At the same time, on the basis of coaxial installation of the encoder, a number of restrictive measures are provided. Specifically, a rotating bearing is designed on the encoder base to provide a smaller rotational resistance, and a damping block with an elastic structure is arranged on the outer ring of the bearing to further restrict the swing of the encoder within a certain range. The outermost ring of the encoder base is connected by a spring sheet to further restrict the swing of the encoder base. The above-mentioned multiple restrictive measures make the installation of the encoder vibration-resistant, thereby improving the long-term working stability of the encoder on the pod main shaft, effectively preventing the pod main shaft vibration from damaging the encoder, and avoiding serious consequences caused by the loss of feedback parameters of the control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a side sectional structural diagram of the present invention; Figure 3 It is a cross-sectional structural diagram of the present invention.

[0012] In the figure: 1. pod; 2. encoder base; 3. encoder; 4. conversion shaft; 5. bearing; 6. spring sheet; 7. damping block. DETAILED DESCRIPTION

[0013] The embodiment of the present application provides a polar-level high-power pod main shaft speed feedback mechanism, and its specific scheme is: by setting an encoder 3, the main shaft speed of the pod 1 can be displayed in real time. At the same time, in order to provide the encoder 3 with a stable working base and avoid the vibration of the main shaft of the pod 1 from being transmitted to the encoder 3, causing premature damage to the encoder 3, an encoder base 2 is provided, and a rotating bearing 5 is designed on the encoder base 2 to provide a smaller rotational resistance, and a damping block 7 of an elastic structure is arranged on the outer ring of the bearing 5 to limit the swing of the encoder 3 within a certain range. In addition, a spring sheet 6 is used in the outermost ring of the encoder base 2 to further limit the swing of the encoder base 2. Because the main shaft of the polar-level high-power pod 1 rotates at a high speed, the vibration caused by the external environment is very large, which may damage the electrical equipment directly installed on the main shaft including the encoder 3. Therefore, on the basis of the coaxial installation of the encoder 3, the present invention sets the above-mentioned multiple restriction measures to effectively protect the stability of the encoder 3 in long-term operation.

[0014] Example: Refer to Figure 1-Figure 3 As shown, a polar-level high-power pod main shaft speed feedback mechanism of the present embodiment includes a pod 1, an encoder base 2 is installed on the outer side of the main shaft position of the pod 1, a conversion shaft 4 is rotatably installed on the inner middle part of the encoder base 2, the end of the conversion shaft 4 is connected to the main shaft of the pod 1, a bearing 5 is provided in the middle of the conversion shaft 4, and an encoder 3 is connected to the head end of the conversion shaft 4, and the encoder 3 is located in the outer middle part of the encoder base 2, wherein the encoder 3 is coaxially installed with the main shaft of the pod 1 and the absolute encoder 3 is used to realize high-precision speed feedback and angle feedback of the main shaft of the pod 1, and send accurate signals collected by the encoder 3 to the control system, thereby realizing precise control of the motor of the pod 1.

[0015] In addition, the outer ring of the encoder base 2 is provided with multiple groups of elastic mechanisms, and the multiple groups of elastic mechanisms are distributed in a circular array with the center point of the encoder base 2. The elastic mechanism includes a spring sheet 6. The outer ring of the encoder base 2 is connected to the pod 1 through the spring sheet 6. The connection is made through the spring sheet 6, thereby alleviating the vibration force on the encoder base 2 and limiting the swing of the encoder base 2 when it is vibrated.

[0016] The bearing 5 is installed in the middle of the inner side of the encoder base 2 , the conversion shaft 4 is installed in the inner ring of the bearing 5 , and a damping block 7 with an elastic structure is arranged in the middle of the inner side of the encoder base 2 , and the damping block 7 is distributed on the outer ring of the bearing 5 .

[0017] The bearing 5 can provide a smaller rotational resistance, and the damping block 7 further restricts the swing of the encoder 3 within a certain range, thereby further enhancing the stability of the encoder 3 during operation.

[0018] The working principle of the present invention is: By using encoder 3 to feedback the speed of the main shaft of pod 1 in real time, using absolute encoder 3, high-precision speed feedback and angle feedback of the main shaft of pod 1 are realized, and accurate signals collected by encoder 3 are sent to the control system, thereby realizing precise control of the motor of pod 1; and by installing encoder 3 and main shaft of pod 1 coaxially, there is no installation gap and idle stroke in the middle, thereby effectively improving the efficiency of feedback speed and the accuracy of angle; In addition, on the basis of coaxial installation of the encoder 3, multiple restriction measures are also set. The setting of multiple restriction measures makes the installation of the encoder 3 vibration-resistant, improves the stability of the encoder 3 working on the main shaft of the pod 1 for a long time, thereby effectively preventing the vibration of the main shaft of the pod 1 from damaging the encoder 3 and avoiding serious consequences caused by the loss of feedback parameters of the control system; The multiple restriction measures are specifically manifested as follows: by designing a rotating bearing 5 on the encoder base 2, a smaller rotational resistance can be provided, and by arranging a damping block 7 with an elastic structure on the outer ring of the bearing 5, the swing of the encoder 3 within a certain range is further restricted. At the same time, by using a spring sheet 6 connection method on the outermost ring of the encoder base 2, the swing of the encoder base 2 is further restricted. The design of multiple restriction measures can effectively improve the stability of the encoder 3.

[0019] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A polar-level high-power pod main shaft speed feedback mechanism, comprising a pod (1), It is characterized in that An encoder base (2) is installed outside the main shaft of the pod (1); a conversion shaft (4) is rotatably installed in the middle of the inner side of the encoder base (2); the end of the conversion shaft (4) is connected to the main shaft of the pod (1); a bearing (5) is provided in the middle of the conversion shaft (4); the head end of the conversion shaft (4) is connected to an encoder (3); and the encoder (3) is located in the middle of the outer side of the encoder base (2); Furthermore, the outer ring of the encoder base (2) is provided with a plurality of sets of elastic mechanisms, and the plurality of sets of elastic mechanisms are distributed in a circular array around the center point of the encoder base (2).

2. According to claim 1, a polar-level high-power pod main shaft speed feedback mechanism, It is characterized in that The elastic mechanism comprises a spring sheet (6), and the outer ring of the encoder base (2) is connected to the pod (1) via the spring sheet (6).

3. According to claim 2, a polar-level high-power pod main shaft speed feedback mechanism, It is characterized in that The bearing (5) is mounted on the inner middle portion of the encoder base (2), and the conversion shaft (4) is mounted on the inner ring of the bearing (5).

4. According to claim 3, a polar-level high-power pod main shaft speed feedback mechanism, It is characterized in that A damping block (7) with an elastic structure is arranged in the middle of the inner side of the encoder base (2), and the damping block (7) is distributed on the outer ring of the bearing (5).

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