A segmented in-place feedback device and its working method

Abstract

The present invention discloses a segmented in-place feedback device. The outer surface of the detection ring is provided with a first step; the outer surface of the detection ring II is provided with a second step and a third step; the height of the third step is greater than that of the first and second steps; the in-place sensor I outputs signal 0 for the non-step part, the first step, and the second step of the detection ring, and outputs signal 1 for the third step of the detection ring II; the in-place sensor II outputs signal 0 for the non-step part and outputs signal 1 for the first and second steps. The present invention also discloses a working method of the segmented in-place feedback device. When the in-place sensors I and II output signals 1, 1; 1, 0; 0, 0; 0, 1, the state of the output shaft is closed in place, the rotation angle is greater than 0° and less than or equal to β, the rotation angle is greater than β and less than 180°, and it is open in place. The present invention can accurately drive the in-place state of the device from open in place to closed in place throughout the whole process.

Description

Technical Field

[0001] The present invention belongs to the technical field of ships, and relates to a segmented in-place feedback device and its working method. Background Art

[0002] For the driving device of existing ships, a servo motor is used to drive a hydraulic pump to establish system pressure, a hydraulic cylinder is used to drive a rack, and the rack drives a crank connecting rod mechanism to realize the linear telescopic operation of a push rod, so as to realize the opening and closing control of a valve. However, the in-place feedback of such driving devices currently is two in-place switches, which feedback two in-place states. Therefore, the intermediate state cannot be feedback, and the motor can only run at one speed in the intermediate running state, resulting in the rated power exceeding the index requirements under the requirements of rated load and running time of the driving device. Summary of the Invention

[0003] The purpose of the present invention is to overcome the above defects, and provide a segmented in-place feedback device and its working method, which solves the technical problem that the intermediate state between the open-in-place and close-in-place of the driving device cannot be feedback. The present invention can accurately feedback the in-place state of the whole process of the driving device from open-in-place to close-in-place.

[0004] To achieve the above invention purpose, the present invention provides the following technical solutions:

[0005] A segmented in-place feedback device, characterized in that it includes a detection ring I, a detection ring II, an in-place sensor I and an in-place sensor II;

[0006] The outer surface of the detection ring I is provided with a first step; the outer surface of the detection ring II is provided with a second step and a third step; the height of the third step is greater than the height of the first step, and the height of the third step is greater than the height of the second step;

[0007] The detection ring I and the detection ring II are assembled on the output shaft of an external motor and rotate synchronously with the output shaft;

[0008] The in-place sensor I and the in-place sensor II are aligned with the outer surfaces of the detection ring I and the detection ring II, and the output signals of the in-place sensor I and the in-place sensor II are used to reflect the in-place state of the output shaft;

[0009] The in-place sensor I outputs a signal 0 to the non-step part and the first step of the detection ring I, and the non-step part and the second step of the detection ring II, and the in-place sensor I outputs a signal 1 to the third step of the detection ring II;

[0010] The in-place sensor II outputs a signal 0 to the non-step part of the detection ring I and the non-step part of the detection ring II, and the in-place sensor II outputs a signal 1 to the first step of the detection ring I and the second step of the detection ring II.

[0011] Further, the angle of the third step is determined as follows:

[0012] According to the relationship curve between the motor torque and the output shaft rotation angle during the process of the output shaft moving from the closed position to the open position, the rotation angle β of the output shaft corresponding to when the motor torque rises to N is taken as the angle of the third step; N is any value in the range of 6 Nm to 8 Nm.

[0013] Further, the leading end of the second step of the detection ring II and the trailing end of the third step are continuous;

[0014] Let the angle between the detection directions of the in-place sensor I and the in-place sensor II be δ, and the sum of the angles of the second step and the third step is equal to δ.

[0015] Further, the angular interval between the leading end of the first step and the trailing end of the second step is equal to the angle through which the output shaft turns when changing from the closed position to the open position.

[0016] Further, when the output shaft is in the closed position, the in-place sensor I aligns with the leading end of the third step, and the in-place sensor II aligns with the trailing end of the second step.

[0017] Further, the heights of the first step and the second step are equal, denoted as h1, and the height of the third step is denoted as h2, and h2 - h1 > the minimum distance that the in-place sensor I and the in-place sensor II can distinguish;

[0018] The detection ring I and the detection ring II are sleeved on the output shaft, and fixed assembly with the output shaft is achieved by using set screws.

[0019] Further, the angle through which the output shaft turns when changing from the closed position to the open position is 180°;

[0020] The angle of the first step is 20°, the angle of the second step is 40°, the angle of the third step is 80°, and the angle between the detection directions of the in-place sensor I and the in-place sensor II is 120°.

[0021] Further, when the output shaft is in the closed position, the rotation angle of the output shaft is 0°, the in-place sensor I aligns with the leading end of the third step, the in-place sensor II aligns with the trailing end of the second step, and the in-place sensor I and the in-place sensor II respectively output signals 1 and 1;

[0022] When the rotation angle of the output shaft is greater than 0° and less than or equal to β, the in-place sensor I aligns with the third step, the in-place sensor II aligns with the part without a step, and the in-place sensor I and the in-place sensor II respectively output signals 1 and 0;

[0023] When the rotation angle of the output shaft is greater than β and less than 180°, the in-place sensor Ⅰ aligns with the second step or the part without steps, the in-place sensor Ⅱ aligns with the part without steps, and the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 0 and 0 respectively;

[0024] When the output shaft reaches the open position, the rotation angle of the output shaft is 180°, the in-place sensor Ⅰ aligns with the part without steps, the in-place sensor Ⅱ aligns with the leading end of the first step, and the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 0 and 1 respectively.

[0025] The working method of the above-mentioned segmented in-place feedback device includes:

[0026] When the in-place sensor Ⅰ aligns with the leading end of the third step and the in-place sensor Ⅱ aligns with the trailing end of the second step, the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 1 and 1 respectively; in this case, it is judged that the rotation angle of the output shaft is 0°, and the output shaft is in the closed position;

[0027] When the in-place sensor Ⅰ aligns with the third step and the in-place sensor Ⅱ aligns with the part without steps, the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 1 and 0 respectively; in this case, it is judged that the rotation angle of the output shaft is greater than 0° and less than or equal to β;

[0028] When the in-place sensor Ⅰ aligns with the second step or the part without steps and the in-place sensor Ⅱ aligns with the part without steps, the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 0 and 0 respectively; in this case, it is judged that the rotation angle of the output shaft is greater than β and less than 180°;

[0029] When the in-place sensor Ⅰ aligns with the part without steps and the in-place sensor Ⅱ aligns with the leading end of the first step, the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 0 and 1 respectively; in this case, it is judged that the rotation angle of the output shaft is 180°, and the output shaft is in the open position.

[0030] Further, the working method of the above-mentioned segmented in-place feedback device further includes:

[0031] When the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 1 and 1 respectively, or the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 0 and 1 respectively, control the motor to run or stop according to requirements;

[0032] When the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 1 and 0 respectively, control the motor to run at a high speed;

[0033] When the in-place sensor Ⅰ and the in-place sensor Ⅱ output signals 0 and 0 respectively, control the motor to run at a low speed;

[0034] The high speed is > 1500 r / min, and the low speed is < 1000 r / min.

[0035] The present invention has at least one of the following beneficial effects compared with the prior art:

[0036] (1) The present invention creatively proposes a segmented in-place feedback device. By using two detection rings and the cooperation between the detection rings and the sensors, it can accurately feedback the in-place state of the output shaft throughout the process from open in-place to closed in-place.

[0037] (2) The present invention provides a structural design method for the detection rings, the relative positions between the detection rings, and the setting method of the relative positions between the detection rings and the sensors. It has strong applicability and certain guiding significance.

[0038] (3) The present invention gives the relationship between the output signals of the detection rings and the various states of the output shaft. According to the output signals of the detection rings, the state of the output shaft can be accurately controlled.

[0039] (4) The present invention divides the state of the output shaft into two stages according to the motor torque, and realizes the identification of the two stages. By controlling the speeds of the two stages respectively, it can effectively avoid the rated power exceeding the index requirements under the requirements of the rated load and running time of the driving device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural diagram of a segmented in-place feedback device in an embodiment of the present invention;

[0041] Figure 2 It is an assembly drawing of the detection ring in an embodiment of the present invention;

[0042] Figure 3 It is a schematic structural diagram of the detection ring in an embodiment of the present invention;

[0043] Figure 4 It is a position diagram of the detection ring in an embodiment of the present invention;

[0044] Figure 5 It is an output pressure curve diagram of the electro-hydrostatic drive device of the through-sea valve in an embodiment of the present invention;

[0045] Wherein: 1 - mounting seat, 2 - nut, 3 - in-place sensor I, 4 - detection ring I, 5 - detection ring II, 6 - in-place sensor II, 7 - set screw, 8 - output shaft, 41 - first step, 51 - second step, 52 - third step. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0046] The following is a detailed description of the present invention, and the features and advantages of the present invention will become clearer and more definite along with these descriptions.

[0047] As used herein, the term "exemplary" means "serving as an example, embodiment, or illustration". Any embodiment described as "exemplary" herein need not be construed as superior or better than other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0048] The object of the present invention is to provide a segmented in-place feedback device, which realizes combined control through the combination of the in-place feedback signals of two in-place sensors. Through the structural design of two detection rings: a low step is set on detection ring I, and two steps of high and low are set on detection ring II, and the step angle range is designed as required. Among them, when in-place sensor I does not sense a step or senses a low step, it outputs signal 0, and when it senses a high step, it outputs signal 1; when in-place sensor II does not sense a step, it outputs signal 0, and when it senses a low step, it outputs signal 1, and the combination of the two in-place feedback signals is shown in Table 1, corresponding to open in-place, close in-place, high-speed operation and low-speed operation of the motor. By controlling the driver to control the high-speed operation of the motor in the starting stage, the low-speed operation of the motor in the stage with large torque of the motor, and stopping when it is open in-place or close in-place, so as to meet the requirements of the running time and rated power of the whole machine.

[0049] Table 1 Combination of feedback signals and control parameter table

[0050] Combination number Control parameter Output of in-place sensor Ⅰ Output of in-place sensor Ⅱ 1 Closed in place 1 1 2 Opened in place 0 1 3 High speed 1 0 4 Low speed 0 0

[0051] Embodiment:

[0052] This embodiment is described in detail in combination with Figures 1 to 5 for illustration.

[0053] In this embodiment, the driving device is an electro-mechanical hydraulic product. A servo motor is used to drive a hydraulic pump to establish system pressure. A rack is driven by a hydraulic cylinder, and a crank-link mechanism is driven by the rack to realize the linear telescopic movement of the ejector rod. The linear telescopic movement of the ejector rod drives the opening and closing of the valve. The full stroke rotation angle of the crank-link mechanism is 0 to 180°. The in-place feedback of this driving device is two in-place switches, which feedback two in-place states, so the intermediate state cannot be feedback. The motor can only run at one speed in the intermediate running state. Under the requirements of rated load and running time, the rated power of this driving device exceeds the index requirements. According to the output characteristics of the crank-link mechanism, under rated load, the output torque curve of the motor is as shown in the appendix Figure 5 shown. In order to meet the requirements of rated power, combined with the analysis of the output torque curve of the motor, a segmented control mode can be adopted: that is, in the starting stage (A) 0 to 80°, when the torque of the motor is small, the motor runs at high speed, and in the stage with large torque of the motor (B) 80° to 180°, the motor runs at low speed.

[0054] To meet the segmented control mode, a segmented in-place feedback device is designed in this embodiment. The segmented control of the motor is achieved through the combination of two in-place feedback signals, and the overall power requirement is met through segmented control.

[0055] The structure of the segmented in-place feedback device in this embodiment is as shown in the appendix Figure 1 and mainly includes a mounting base 1, a nut 2, an in-place sensor I 3, an in-place sensor II 6, a detection ring I 4, a detection ring II 5, and a set screw 7.

[0056] The detection ring I 4 and the detection ring II 5 are sleeved on the output shaft 8 of the device. When not assembled, the two detection rings can rotate relative to the output shaft. After assembly, they are fixed on the output shaft 8 through the set screw 7 to fix the relative position.

[0057] As shown in the appendix Figure 3 The detection ring I 4 is provided with a low step (the first step 41) about 3 mm high at an angle of about 20°. The detection ring II 5 is provided with a high step (the third step 52) 6 mm high and a low step (the second step 51) 3 mm high. In this embodiment, the angle range of the high step of the detection ring II 5 is designed according to 80°, and the angle range of the low step is 40°. The angle range of the low step is designed by subtracting the high step angle of 80° from the relative position angle of 120° of the two in-place sensors.

[0058] As shown in the appendix Figure 2 The detection ring II 5 and the detection ring I 4 are sleeved on the output shaft in sequence, and the detection ring II 5 and the detection ring I 4 can rotate relative to the output shaft. At the open and closed in-place positions of the output shaft, the detection ring I 4 and the detection ring II 5 are adjusted so that the interval angle between the leading end of the first step and the trailing end of the second step is equal to the angle (180° in this embodiment) that the output shaft turns from the closed in-place to the open in-place. The detection ring II 5 and the detection ring I 4 are fixed on the output shaft through the set screw 7. In the present invention, the meanings of "leading" and "trailing" are as follows: taking the clockwise direction as the forward direction, the front end of a certain step is the leading end, and the rear end is the trailing end.

[0059] The distance between the sensing surface of the in-place sensor I 3 and the high step is adjusted to 1 - 2 mm through the nut 2 in the in-place sensor. The in-place sensor I 3 does not feedback signals to the low step and the non-step surface; the distance between the sensing surface of the in-place sensor II 6 and the low step is adjusted to 1 - 2 mm through the nut 2, and this position does not feedback signals to the non-step surface.

[0060] As Figure 4 , the working principle is as follows:

[0061] When the output shaft is in the open in-place state, that is, when the rotation angle of the output shaft is 180°, the in-place sensor I does not feedback signals to the non-step surface, and the in-place sensor II feedbacks signals to the low step. The open in-place signal combination is (0, 1);

[0062] When the output shaft is in the closed position, that is, when the rotation angle of the output shaft is 0°, the in-place sensor I feeds back a signal to the high step surface, the in-place sensor II feeds back a signal to the low step, and the closed position signal combination is (1, 1);

[0063] When the motor is at high speed, that is, when the rotation angle of the output shaft is between 0° and 80°, the in-place sensor I feeds back a signal to the high step surface, the in-place sensor II does not feed back a signal for no step, and the high speed signal combination is (1, 0);

[0064] When the motor is at low speed, that is, when the rotation angle of the output shaft is between 80° and 180°, the in-place sensor I does not feed back a signal for the low step surface or no step, the in-place sensor II does not feed back a signal for no step, and the low speed signal combination is (0, 0);

[0065] The control driver judges and controls the operation or shutdown of the motor by the combined information of the feedback signals.

[0066] The present invention has been described in detail above in combination with specific embodiments and exemplary examples, but these descriptions should not be construed as limiting the present invention. Those skilled in the art understand that without departing from the spirit and scope of the present invention, various equivalent substitutions, modifications or improvements can be made to the technical solutions and their implementation manners of the present invention, and these all fall within the scope of the present invention. The protection scope of the present invention is subject to the appended claims.

[0067] The content not described in detail in the specification of the present invention belongs to the well-known technology of those skilled in the art.

Claims

1. A segmented in-place feedback device, characterized in that, It includes a detection ring I (4), a detection ring II (5), a position sensor I (3) and a position sensor II (6); The outer surface of the detection ring I (4) is provided with a first step; the outer surface of the detection ring II (5) is provided with a second step and a third step; the height of the third step is greater than the height of the first step, and the height of the third step is greater than the height of the second step; The detection ring I (4) and the detection ring II (5) are assembled on the output shaft of an external motor and rotate synchronously with the output shaft; The position sensor I (3) and the position sensor II (6) are aligned with the outer surfaces of the detection ring I (4) and the detection ring II (5), and the output signals of the position sensor I (3) and the position sensor II (6) are used to reflect the in-place state of the output shaft; The position sensor I (3) outputs a signal 0 to the non-step part and the first step of the detection ring I (4), and the non-step part and the second step of the detection ring II (5), and the position sensor I (3) outputs a signal 1 to the third step of the detection ring II (5); The position sensor II (6) outputs a signal 0 to the non-step part of the detection ring I (4) and the non-step part of the detection ring II (5), and the position sensor II (6) outputs a signal 1 to the first step of the detection ring I (4) and the second step of the detection ring II (5).

2. The segmented in-place feedback device according to claim 1, characterized in that, The angle of the third step is determined according to the following method: According to the relationship curve between the motor torque and the output shaft rotation angle during the process of the output shaft moving from the closed position to the open position, the output shaft rotation angle β corresponding to the motor torque rising to N is used as the angle of the third step; N is any value in the range of 6 Nm to 8 Nm.

3. The segmented in-place feedback device according to claim 2, characterized in that, The leading end of the second step of the detection ring II (5) and the trailing end of the third step are continuous; Let the angle between the detection direction of the position sensor I (3) and the detection direction of the position sensor II (6) be δ, and the sum of the angles of the second step and the third step is equal to δ.

4. The segmented in-place feedback device according to claim 3, characterized in that, The interval angle between the leading end of the first step and the trailing end of the second step is equal to the angle turned by the output shaft when it changes from the closed position to the open position.

5. The segmented in-place feedback device according to claim 4, characterized in that, When the output shaft is in the closed position, the position sensor I (3) is aligned with the leading end of the third step, and the position sensor II (6) is aligned with the trailing end of the second step.

6. The segmented in-place feedback device according to claim 4, characterized in that, The heights of the first step and the second step are equal, set as h1, the height of the third step is set as h2, and h2 - h1 > the minimum distance that the position sensor I (3) and the position sensor II (6) can distinguish; The detection ring I (4) and the detection ring II (5) are sleeved on the output shaft, and the fixed assembly with the output shaft is realized by using a set screw (7).

7. The segmented in-place feedback device according to claim 5, characterized in that, The angle turned by the output shaft when it changes from the closed position to the open position is 180°; The angle of the first step is 20°, the angle of the second step is 40°, the angle of the third step is 80°, and the angle between the detection direction of the position sensor I (3) and the detection direction of the position sensor II (6) is 120°.

8. The segmented in-place feedback device according to claim 7, characterized in that, When the output shaft is in the closed position, the rotation angle of the output shaft is 0°, the position sensor I (3) is aligned with the leading end of the third step, the position sensor II (6) is aligned with the trailing end of the second step, and the position sensor I (3) and the position sensor II (6) respectively output signals 1 and 1; When the rotation angle of the output shaft is greater than 0° and less than or equal to β, the in-place sensor I (3) aligns with the third step, the in-place sensor II (6) aligns with the part without steps, and the in-place sensor I (3) and the in-place sensor II (6) output signals 1 and 0 respectively; When the rotation angle of the output shaft is greater than β and less than 180°, the in-place sensor I (3) aligns with the second step or the part without steps, the in-place sensor II (6) aligns with the part without steps, and the in-place sensor I (3) and the in-place sensor II (6) output signals 0 and 0 respectively; When the output shaft is fully open, the rotation angle of the output shaft is 180°, the in-place sensor I (3) aligns with the part without steps, the in-place sensor II (6) aligns with the leading end of the first step, and the in-place sensor I (3) and the in-place sensor II (6) output signals 0 and 1 respectively.

9. The working method of the segmented in-place feedback device according to any one of claims 4 to 8, characterized in that, Including: When the in-place sensor I (3) aligns with the leading end of the third step and the in-place sensor II (6) aligns with the trailing end of the second step, the in-place sensor I (3) and the in-place sensor II (6) output signals 1 and 1 respectively; in this case, it is judged that the rotation angle of the output shaft is 0°, and the output shaft is fully closed; When the in-place sensor I (3) aligns with the third step and the in-place sensor II (6) aligns with the part without steps, the in-place sensor I (3) and the in-place sensor II (6) output signals 1 and 0 respectively; in this case, it is judged that the rotation angle of the output shaft is greater than 0° and less than or equal to β; When the in-place sensor I (3) aligns with the second step or the part without steps and the in-place sensor II (6) aligns with the part without steps, the in-place sensor I (3) and the in-place sensor II (6) output signals 0 and 0 respectively; in this case, it is judged that the rotation angle of the output shaft is greater than β and less than 180°; When the in-place sensor I (3) aligns with the part without steps and the in-place sensor II (6) aligns with the leading end of the first step, the in-place sensor I (3) and the in-place sensor II (6) output signals 0 and 1 respectively; in this case, it is judged that the rotation angle of the output shaft is 180°, and the output shaft is fully open.

10. The working method of the segmented in-place feedback device according to claim 9, characterized in that, Also including: When the in-place sensor I (3) and the in-place sensor II (6) output signals 1 and 1 respectively, or the in-place sensor I (3) and the in-place sensor II (6) output signals 0 and 1 respectively, control the motor to run or stop according to requirements; When the in-place sensor I (3) and the in-place sensor II (6) output signals 1 and 0 respectively, control the motor to run at high speed; When the in-place sensor I (3) and the in-place sensor II (6) output signals 0 and 0 respectively, control the motor to run at low speed; The high speed is > 1500 r / min, and the low speed is < 1000 r / min.

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