CN113218576A - Device and method for detecting rotational inertia of large-scale shaft part - Google Patents
Device and method for detecting rotational inertia of large-scale shaft part Download PDFInfo
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Abstract
The invention provides a large-scale shaft part rotational inertia detection device and a detection method, which comprise a support adjusting mechanism, wherein two sides of the support adjusting mechanism are provided with slidable arc-shaped seats, shaft parts abut against the arc-shaped seats to rotate, one sides of the arc-shaped seats are provided with slidable photoelectric sensors, the outer sides of the shaft parts are fixedly provided with reflective belts, the photoelectric sensors are opposite to the reflective belts, one sides of the support adjusting mechanism are provided with detection driving mechanisms, and the detection driving mechanisms are connected with the shaft parts through second ropes; the second rope twines on axle type spare part, thereby detects actuating mechanism pulling second rope and removes and drive axle type spare part and rotate, thereby photoelectric sensor detects the instantaneous rotational speed that reflective tape obtained axle type spare part. The rotational inertia of shaft parts can be detected accurately, the installation and rotation operations of the shaft parts are simple and convenient, the detection of the rotational inertia is convenient and accurate, and the device is suitable for popularization and use.
Description
Technical Field
The invention relates to the field of inertia detection, in particular to a large-scale shaft part rotational inertia detection device and a detection method.
Background
For large rotating mechanical equipment, torsional vibration during the operation of the equipment is generally required to be calculated so as to ensure the safety of a shafting. In the process of calculating the torsional vibration, the rotational inertia of the shafting component of the unit needs to be accurately obtained. The moment of inertia of a general shaft-like component can be calculated by modeling. However, for a large-scale unit, the shafting structure and parts are complex, and the accurate value is difficult to obtain through modeling or a general rotational inertia test method.
Disclosure of Invention
The invention mainly aims to provide a device and a method for detecting the rotational inertia of a large-sized shaft part, and solves the problem that the detection precision is poor due to the fact that the rotational inertia of the large-sized shaft part is complex in structure.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the device comprises a supporting and adjusting mechanism, wherein slidable arc-shaped seats are arranged on two sides of the supporting and adjusting mechanism, a shaft part abuts against the arc-shaped seats to rotate, a slidable photoelectric sensor is arranged on one side of each arc-shaped seat, a reflective belt is fixedly arranged on the outer side of the shaft part, the photoelectric sensor is right opposite to the reflective belt, a detection driving mechanism is arranged on one side of the supporting and adjusting mechanism, and the detection driving mechanism is connected with the shaft part through a second rope;
the second rope twines on axle type spare part, thereby detects actuating mechanism pulling second rope and removes and drive axle type spare part and rotate, thereby photoelectric sensor detects the instantaneous rotational speed that reflective tape obtained axle type spare part.
In the preferred scheme, the arc seat of one side is fixed on the base in supporting adjustment mechanism, and the arc seat and the base sliding connection of opposite side to adjust the interval between the arc seat of both sides, be equipped with a plurality of recesses on the arc seat, the recess internal stability has the gyro wheel.
In the preferred scheme, arc seat bottom is equipped with second spiral elevating system, and the arc seat passes through second spiral elevating system and base sliding connection to adjust the interval between arc seat and the base.
In the preferred scheme, be equipped with the pivoted lead screw on the base, the lead screw both ends are passed through the bearing frame and are connected with the base, and gliding arc seat bottom is equipped with the sliding seat, and the arc seat passes through second spiral elevating system and sliding seat sliding connection, and the sliding seat both ends are supported and are leaned on and slide on the base, sliding seat and lead screw threaded connection.
In the preferred scheme, a motor is fixedly arranged on the base, and an output shaft of the motor is connected with the screw rod through a chain wheel and a chain.
In the preferred scheme, a sliding detection seat is arranged on one side of a base in the supporting and adjusting mechanism, a sliding adjusting plate is arranged on the detection seat, and the photoelectric sensor is fixed on the adjusting plate.
In the preferred scheme, detect the seat and pass through guide rail slider and base sliding connection, be equipped with first spiral elevating system between regulating plate and the detection seat, the guide post has set firmly on the regulating plate, and the guide post wears to slide on detecting the seat.
In the preferred scheme, a third fixed pulley is fixedly arranged at the top of a support in the detection driving mechanism, a movable pulley block consisting of a first movable pulley and a second movable pulley is arranged on one side of the third fixed pulley, a second rope abuts against the third fixed pulley to slide, and the end part of the second rope is fixed on the movable pulley block.
In the preferred scheme, a fixed pulley group consisting of a first fixed pulley and a second fixed pulley is arranged on one side of a movable pulley group, the fixed pulley group is fixed at the bottom of the support, the movable pulley group is connected with the fixed pulley group through a first rope, one end of the first rope is fixed on the movable pulley group, and a weight is fixedly arranged at the other end of the first rope;
the weight drives the first rope to move due to dead weight, and simultaneously drives the movable pulley block and the second rope to move so as to enable the shaft parts to rotate.
The method comprises the following steps: s1, hoisting the shaft parts to the arc-shaped seat, and adjusting the distance between the arc-shaped seats and the rollers according to the length and the diameter of the shaft parts;
s2, attaching a reflective tape on one side of the shaft part, and adjusting the height of the photoelectric sensor to enable the photoelectric sensor to be opposite to the reflective tape;
s3, fixing the end part of a second rope on a shaft part and winding the second rope for multiple circles, wherein the other end of the second rope is fixed on a movable pulley block around a third fixed pulley;
s4, connecting the movable pulley block and the fixed pulley block by the first rope in an odd-moving and even-fixing mode;
s5, fixing the weight at the end of the first rope, loosening the weight to drive the movable pulley block to move, pulling the shaft parts to rotate through the second rope, and detecting the acceleration and the reverse acceleration of the shaft parts by the photoelectric sensor;
s6, the shaft radius is r, the weight mass is M, the mass of the movable pulley block is M1, the movable pulley block and the fixed pulley block are connected by two pulleys, the rotating speed of the shaft part is low in the test process, the weight is unchanged, the friction coefficient is low, the friction force can be regarded as constant force, and the friction torque can be regarded as constant torque MμThe acceleration of the shaft part in the falling process of the weight is beta, and the reverse acceleration of the shaft part under the action of the friction torque after the weight falls to the ground is beta ', and the beta' is negative because of the reverse acceleration;
s7, the acceleration of the movable pulley block in the falling process is the same as the acceleration of the movable pulley block in the tangential direction of the outer diameter of the shaft part, the first rope tension connected with the weight is T, and the first rope tension connected with the shaft part is T according to the labor-saving principle of the movable pulley block1；
S8, according to Newton' S second law, respectively taking the movable pulley block, the weight and the shaft part as research objects, then there is the movable pulley block m1 r beta T1-5T, the weight m falling with an acceleration a, i.e. m a g-T; for shaft parts, J is beta, T1 is r + M in the process of weight fallingμBecause the rope rigidity is larger and the elongation is neglected, the acceleration relation between the weight acceleration and the shaft parts is that a is 5 beta, and the rotating shaft loses the rope tension T after the weight falls to the ground1In the condition of inertia and friction moment, the speed is reduced, and M isμ＝J*β'，
Then there is a system of equations:
the expression of the rotational inertia J of the shaft part finally obtained by integrating the formula is as follows:
the invention provides a device and a method for detecting the rotational inertia of large-scale shaft parts, wherein the shaft parts are hung on a supporting and adjusting mechanism, the space between arc-shaped seats and rollers on the arc-shaped seats can be adjusted to be suitable for the shaft parts with different lengths and diameters, a sliding-adjusted photoelectric sensor can also be adjusted according to the size of the shaft parts, so that the photoelectric sensor is just opposite to a reflective tape attached to the shaft parts, a second rope wound on the shaft parts is driven by a detection driving mechanism, the shaft parts rotate due to inertia, the acceleration and the directional acceleration measured by the photoelectric sensor and the detection driving mechanism apply a rotational moment, and the more accurate rotational inertia of the shaft parts can be obtained, the installation and rotation operations of the shaft parts are simple and convenient, and the detection of the rotational inertia is convenient and accurate, is suitable for popularization and application.
Drawings
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a left side view of the overall construction of the present invention;
FIG. 2 is a right side view of the overall construction of the present invention;
FIG. 3 is an elevational view of the overall construction of the present invention;
FIG. 4 is a side elevational view of the support adjustment mechanism of the present invention;
FIG. 5 is a top view of the support adjustment mechanism of the present invention;
FIG. 6 is a cross-sectional view of the invention A-A;
FIG. 7 is a cross-sectional view of the invention B-B;
FIG. 8 is a side elevational view of the second screw jack mechanism of the present invention;
FIG. 9 is a schematic view of the pulley connection in the second screw jack of the present invention;
in the figure: a support adjusting mechanism 1; a base 101; an arc seat 102; a detection base 103; an adjustment plate 104; a first screw elevating mechanism 105; a photosensor 106; the guide posts 107; a screw rod 108; a motor 109; a roller 110; a second screw elevating mechanism 111; a slide base 112; a recess 113; a detection drive mechanism 2; a support 201; a first movable sheave 202; a second movable sheave 203; a weight 204; a first fixed pulley 205; a second fixed pulley 206; a first rope 207; a third fixed sheave 208; a shaft-like component 3; a second rope 4; a reflective tape 5.
Detailed Description
Example 1
As shown in fig. 1 to 9, a large-scale shaft part rotational inertia detection device and a detection method include a support adjustment mechanism 1, slidable arc-shaped seats 102 are arranged on two sides of the support adjustment mechanism 1, a shaft part 3 abuts against the arc-shaped seats 102 to rotate, a slidable photoelectric sensor 106 is arranged on one side of each arc-shaped seat 102, a reflective belt 5 is fixedly arranged on the outer side of the shaft part 3, the photoelectric sensor 106 is opposite to the reflective belt 5, a detection driving mechanism 2 is arranged on one side of the support adjustment mechanism 1, and the detection driving mechanism 2 is connected with the shaft part 3 through a second rope 4;
the second rope 4 winds on the shaft type parts 3, the detection driving mechanism 2 pulls the second rope 4 to move so as to drive the shaft type parts 3 to rotate, the photoelectric sensor 106 detects the reflective belt 5 so as to obtain the instantaneous rotating speed of the shaft type parts 3, and therefore the structure is adopted, the sliding-adjusting arc-shaped seat 102 can be suitable for the shaft type parts 3 with different sizes and specifications, the detection driving mechanism 2 can apply a constant driving moment to the shaft type parts 3, the photoelectric sensor 106 can detect the acceleration of the shaft type parts 3 and the reverse acceleration under the action of the friction moment, and the higher rotating inertia can be obtained according to the applied constant driving moment and the detected acceleration.
In a preferred scheme, the arc-shaped seat 102 on one side is fixed on the base 101 in the support adjusting mechanism 1, the arc-shaped seat 102 on the other side is connected with the base 101 in a sliding manner, so that the distance between the arc-shaped seats 102 on two sides is adjusted, a plurality of grooves 113 are formed in the arc-shaped seat 102, and rollers 110 are fixedly arranged in the grooves 113. By the structure, the distance between the arc-shaped seats 102 can be adjusted in a sliding mode to adapt to shaft parts 3 with different lengths, the grooves 113 in the arc-shaped seats 102 can be used for being suitable for the shaft parts 3 with different diameters, the application range is wide, and the inertia detection range of the shaft parts 3 with different specifications and sizes is wide.
In the preferred scheme, the bottom of the arc-shaped seat 102 is provided with the second spiral lifting mechanism 111, and the arc-shaped seat 102 is slidably connected with the base 101 through the second spiral lifting mechanism 111, so that the distance between the arc-shaped seat 102 and the base 101 is adjusted, and with the structure, the distance between the arc-shaped seat 102 and the base 101 can be adjusted by adjusting the second spiral lifting mechanism 111, so that the shaft type parts 3 on the arc-shaped seat 102 can be ensured to be in a horizontal state, and the rotational inertia detection precision is ensured.
In a preferable scheme, a rotating screw rod 108 is arranged on the base 101, two ends of the screw rod 108 are connected with the base 101 through bearing seats, a sliding seat 112 is arranged at the bottom of the sliding arc-shaped seat 102, the arc-shaped seat 102 is in sliding connection with the sliding seat 112 through a second spiral lifting mechanism 111, two ends of the sliding seat 112 abut against the base 101 to slide, the sliding seat 112 is in threaded connection with the screw rod 108, and therefore, the screw rod 108 is rotated to drive the sliding seat 112 and the arc-shaped seat 102 to move, and the distance between the two arc-shaped seats 102 can be adjusted to be suitable for shaft parts 3 with different lengths.
In the preferred scheme, the motor 109 is fixedly arranged on the base 101, and an output shaft of the motor 109 is connected with the screw rod 108 through a chain wheel and a chain, so that the motor 109 drives the screw rod 108 to rotate to adjust the distance between the two arc-shaped seats 102, and the operation is simple, convenient and fast.
In the preferred scheme, base 101 one side in supporting adjustment mechanism 1 is equipped with gliding detection seat 103, is equipped with gliding regulating plate 104 on detecting the seat 103, and photoelectric sensor 106 fixes on regulating plate 104, and by this structure, gliding regulation's photoelectric sensor 106 can slide from top to bottom about base 101 one side for be suitable for not unidimensional axle type spare part 3, make photoelectric sensor 106 can just be to pasting reflective tape 5 on axle type spare part 3, and easy operation is convenient, and application scope is wide.
In the preferred scheme, detect seat 103 through guide rail slider and base 101 sliding connection, be equipped with first spiral elevating system 105 between regulating plate 104 and the detection seat 103, the guide post 107 has set firmly on regulating plate 104, the guide post 107 wears to slide on detecting seat 103, from this structure, manual drive detects seat 103 and passes through guide rail slider horizontal slip on base 101, first spiral elevating system 105 can drive regulating plate 104 and slide from top to bottom, thereby can let photoelectric sensor 106 from top to bottom control omnidirectional removal, photoelectric sensor 106 of being convenient for can be suitable for not unidimensional axle type spare part 3, and easy operation is convenient.
In the preferred scheme, a third fixed pulley 208 is fixedly arranged at the top of a support 201 in the detection driving mechanism 2, a movable pulley block consisting of a first movable pulley 202 and a second movable pulley 203 is arranged on one side of the third fixed pulley 208, the second rope 4 slides against the third fixed pulley 208, and the end part of the second rope 4 is fixed on the movable pulley block.
In a preferable scheme, a fixed pulley block composed of a first fixed pulley 205 and a second fixed pulley 206 is arranged on one side of a movable pulley block, the fixed pulley block is fixed at the bottom of the support 201, the movable pulley block is connected with the fixed pulley block through a first rope 207, one end of the first rope 207 is fixed on the movable pulley block, and a weight 204 is fixedly arranged at the other end of the first rope 207;
the weight 204 drives the first rope 207 to move because of the dead weight, drives the running block and the second rope 4 to move simultaneously to make the shaft type spare part 3 rotate, from this structure, the first rope 207 is connected the running block and the running block through the mode of "odd movable even decides", hangs the weight 204 on the tip of first rope 207, can exert a constant drive moment to the shaft type spare part 3 after loosening the weight 204, thereby can calculate the inertia of shaft type spare part 3.
Example 2
Further described with reference to embodiment 1, as shown in fig. 1 to 9, the shaft-like component 3 is hung on the arc-shaped seat 102, and the distance between the arc-shaped seats 102 and the roller 110 are adjusted according to the length and the diameter of the shaft-like component 3; attaching a reflective tape 5 on one side of the shaft part 3, and adjusting the height of the photoelectric sensor 106 to enable the reflective tape 5 to be opposite to the height of the photoelectric sensor; fixing the end part of the second rope 4 on the shaft part 3 and winding for a plurality of circles, and fixing the other end of the second rope 4 on the movable pulley block by winding the third fixed pulley 208; a first rope 207 connects the movable pulley block and the fixed pulley block in a mode of odd movement and even fixation; fixing a weight 204 at the end of the first rope 207, loosening the weight 204 to drive the movable pulley block to move, pulling the shaft part 3 to rotate through the second rope 4, and detecting the acceleration and the reverse acceleration of the shaft part 3 by the photoelectric sensor 106; the shaft radius is r, the weight mass is M, the mass of the movable pulley block is M1, the movable pulley block and the fixed pulley block are connected by two pulleys, and because the rotating speed of the shaft part is low in the test process, the weight is unchanged, the friction coefficient is low, the friction force can be regarded as constant force, and the friction torque can be regarded as constant torque MμThe acceleration of the shaft component 3 during the falling of the weight 204 is β, and the reverse acceleration of the shaft component 3 under the action of the friction torque after the weight 204 falls to the ground is β ', and because of the reverse acceleration, β' is negative; the acceleration of the movable pulley block in the falling process is the same as the acceleration of the axle part 3 in the external diameter tangential direction, and according to the labor-saving principle of the movable pulley, the tension of the first rope 207 connected with the weight 204 is T, and the tension of the first rope 207 connected with the axle part 3 is T1(ii) a According to the second newton law, the movable pulley block m1 r β T is selected as the research object, the weight 204 and the shaft component 3 are selected as the research object respectively1-5T, the weight 204m drops with an acceleration a, i.e. m a g-T; for the shaft component 3, J β ═ T1 ═ r + M during the falling of the weight 204μBecause the rope has larger rigidity and neglects the elongation, the acceleration relation between the weight 204 and the shaft part 3 is that a is 5 beta, and when the weight 204 falls to the ground, the rotating shaft loses the rope tension T1In a decelerating motion under the conditions of inertia and friction torque, whichWhen there is Mμ＝J*β'，
Then there is a system of equations:
the expression of the moment of inertia J of the shaft part 3 finally obtained by integrating the formula is as follows:
the above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a large-scale axle class spare part inertia detection device, characterized by: the device comprises a supporting and adjusting mechanism (1), wherein slidable arc-shaped seats (102) are arranged on two sides of the supporting and adjusting mechanism (1), shaft parts (3) abut against the arc-shaped seats (102) to rotate, a slidable photoelectric sensor (106) is arranged on one side of each arc-shaped seat (102), a reflective tape (5) is fixedly arranged on the outer side of each shaft part (3), the photoelectric sensor (106) is over against the reflective tape (5), a detection driving mechanism (2) is arranged on one side of the supporting and adjusting mechanism (1), and the detection driving mechanism (2) is connected with the shaft parts (3) through a second rope (4);
the second rope (4) twines on axle type spare part (3), thereby detects actuating mechanism (2) pulling second rope (4) and removes and drive axle type spare part (3) and rotate, thereby photoelectric sensor (106) detect reflection of light area (5) obtain the instantaneous rotational speed of axle type spare part (3).
2. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 1, wherein: the arc-shaped seat (102) on one side is fixed on the base (101) in the supporting and adjusting mechanism (1), the arc-shaped seat (102) on the other side is connected with the base (101) in a sliding mode, so that the distance between the arc-shaped seats (102) on the two sides is adjusted, a plurality of grooves (113) are formed in the arc-shaped seat (102), and rollers (110) are fixedly arranged in the grooves (113).
3. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 2, wherein: the bottom of the arc-shaped seat (102) is provided with a second spiral lifting mechanism (111), and the arc-shaped seat (102) is connected with the base (101) in a sliding manner through the second spiral lifting mechanism (111) so as to adjust the distance between the arc-shaped seat (102) and the base (101).
4. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 2, wherein: be equipped with pivoted lead screw (108) on base (101), lead screw (108) both ends are passed through the bearing frame and are connected with base (101), and gliding arc seat (102) bottom is equipped with sliding seat (112), and arc seat (102) are through second spiral elevating system (111) and sliding seat (112) sliding connection, and sliding seat (112) both ends are supported and are leaned on and slide on base (101), sliding seat (112) and lead screw (108) threaded connection.
5. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 4, wherein: a motor (109) is fixedly arranged on the base (101), and an output shaft of the motor (109) is connected with the screw rod (108) through a chain wheel and a chain.
6. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 1, wherein: a sliding detection seat (103) is arranged on one side of a base (101) in the supporting and adjusting mechanism (1), a sliding adjusting plate (104) is arranged on the detection seat (103), and a photoelectric sensor (106) is fixed on the adjusting plate (104).
7. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 6, wherein: detect seat (103) and pass through guide rail slider and base (101) sliding connection, be equipped with first spiral elevating system (105) between regulating plate (104) and detecting seat (103), the guide post (107) has set firmly on regulating plate (104), and guide post (107) wear to slide on detecting seat (103).
8. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 1, wherein: the top of a support (201) in the detection driving mechanism (2) is fixedly provided with a third fixed pulley (208), one side of the third fixed pulley (208) is provided with a movable pulley block consisting of a first movable pulley (202) and a second movable pulley (203), a second rope (4) abuts against the third fixed pulley (208) to slide, and the end part of the second rope (4) is fixed on the movable pulley block.
9. The device for detecting the moment of inertia of a large shaft-like component as claimed in claim 8, wherein: a fixed pulley block consisting of a first fixed pulley (205) and a second fixed pulley (206) is arranged on one side of the movable pulley block, the fixed pulley block is fixed at the bottom of the support (201), the movable pulley block is connected with the fixed pulley block through a first rope (207), one end of the first rope (207) is fixed on the movable pulley block, and a weight (204) is fixedly arranged on the other end of the first rope (207);
the weight (204) drives the first rope (207) to move due to self weight, and simultaneously drives the movable pulley block and the second rope (4) to move, so that the shaft parts (3) rotate.
10. The device and the method for detecting the moment of inertia of a large-sized axial part according to any one of claims 1 to 9, wherein the method comprises the following steps: s1, hoisting the shaft parts (3) to the arc-shaped seat (102), and adjusting the distance between the arc-shaped seat (102) and the roller (110) according to the length and the diameter of the shaft parts (3);
s2, attaching a reflective tape (5) to one side of the shaft part (3), and adjusting the height of the photoelectric sensor (106) to enable the photoelectric sensor to be opposite to the reflective tape (5);
s3, fixing the end of a second rope (4) on a shaft part (3) and winding the second rope for multiple circles, wherein the other end of the second rope (4) is fixed on a movable pulley block by winding a third fixed pulley (208);
s4, connecting the movable pulley block and the fixed pulley block by the first rope (207) in a mode of odd movement and even fixation;
s5, fixing the weight (204) at the end of the first rope (207), loosening the weight (204) to drive the movable pulley block to move, pulling the shaft part (3) to rotate through the second rope (4), and detecting the acceleration and the reverse acceleration of the shaft part (3) by the photoelectric sensor (106);
s6, the shaft radius is r, the weight mass is M, the mass of the movable pulley block is M1, the movable pulley block is connected with the fixed pulley block by adopting two pulleys, and because the rotating speed of the shaft part (3) is small in the test process, the weight is unchanged, the friction coefficient is small, the friction force can be regarded as constant force, and the friction torque can be regarded as constant torque MμThe acceleration of the shaft part (3) in the falling process of the weight (204) is beta, and the reverse acceleration of the shaft part (3) under the action of the friction torque after the weight (204) falls to the ground is beta ', and the beta' is negative because of the reverse acceleration;
s7, the acceleration of the movable pulley block is the same as the acceleration of the axle part (3) in the outer diameter tangential direction in the falling process, according to the labor-saving principle of the movable pulley, the tension of the first rope (207) connected with the weight (204) is T, and the tension of the first rope (207) connected with the axle part (3) is T1；
S8, according to Newton' S second law, respectively taking the movable pulley block, the weight (204) and the shaft part (3) as research objects, wherein the movable pulley block m1 r beta T1-5T, the weight (204) with mass m having an acceleration a when falling, i.e. m a g-T; for the shaft type component (3), J beta-T1 r + M is formed in the falling process of the weight (204)μBecause the rope has larger rigidity and neglects the elongation, the acceleration relation between the weight (204) and the shaft part (3) is that a is 5 beta, and when the weight (204) falls to the ground, the rotating shaft loses the rope tension T1In the condition of inertia and friction moment, the speed is reduced, and M isμ＝J*β'，
Then there is a system of equations:
the expression of the moment of inertia J of the shaft part (3) finally obtained by integrating the formula is as follows:
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| CN202110391867.4A CN113218576A (en) | 2021-04-12 | 2021-04-12 | Device and method for detecting rotational inertia of large-scale shaft part |
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| CN202110391867.4A CN113218576A (en) | 2021-04-12 | 2021-04-12 | Device and method for detecting rotational inertia of large-scale shaft part |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115096489A (en) * | 2022-06-30 | 2022-09-23 | 河北汉光重工有限责任公司 | Brush friction torque measuring method and system of brush torque motor |
| CN117030116A (en) * | 2023-10-10 | 2023-11-10 | 北京星河动力装备科技有限公司 | Device and method for measuring rotational inertia of aircraft component |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201060085Y (en) * | 2007-04-30 | 2008-05-14 | 华南理工大学 | Motorcar chassis dynamometer machine measurement mechanism |
| CN102445304A (en) * | 2011-09-21 | 2012-05-09 | 华北电力大学（保定） | Device for measuring solid moment of inertia |
| CN103808461A (en) * | 2012-11-14 | 2014-05-21 | 陈均钧 | Device for measuring rotational inertia of rigid body through magnetic suspension rotating platform |
| CN106872103A (en) * | 2017-03-23 | 2017-06-20 | 重庆科技学院 | Processional moment measuring device and assay method |
| CN209664704U (en) * | 2019-03-25 | 2019-11-22 | 常州市海宝焊割有限公司 | A kind of robot welding pipe flange fixing tool |
| CN210703395U (en) * | 2019-08-06 | 2020-06-09 | 湖北电力天源钢管塔有限公司 | Steel pipe welding supporting platform |
| CN111958174A (en) * | 2020-07-02 | 2020-11-20 | 中建八局第一建设有限公司 | Automatic positioning welding robot for steel pipes |
-
2021
- 2021-04-12 CN CN202110391867.4A patent/CN113218576A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201060085Y (en) * | 2007-04-30 | 2008-05-14 | 华南理工大学 | Motorcar chassis dynamometer machine measurement mechanism |
| CN102445304A (en) * | 2011-09-21 | 2012-05-09 | 华北电力大学（保定） | Device for measuring solid moment of inertia |
| CN103808461A (en) * | 2012-11-14 | 2014-05-21 | 陈均钧 | Device for measuring rotational inertia of rigid body through magnetic suspension rotating platform |
| CN106872103A (en) * | 2017-03-23 | 2017-06-20 | 重庆科技学院 | Processional moment measuring device and assay method |
| CN209664704U (en) * | 2019-03-25 | 2019-11-22 | 常州市海宝焊割有限公司 | A kind of robot welding pipe flange fixing tool |
| CN210703395U (en) * | 2019-08-06 | 2020-06-09 | 湖北电力天源钢管塔有限公司 | Steel pipe welding supporting platform |
| CN111958174A (en) * | 2020-07-02 | 2020-11-20 | 中建八局第一建设有限公司 | Automatic positioning welding robot for steel pipes |
Non-Patent Citations (1)
| Title |
|---|
| 黄思俞: "《大学物理实验》", 31 December 2017, 厦门大学出版社, pages: 40 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115096489A (en) * | 2022-06-30 | 2022-09-23 | 河北汉光重工有限责任公司 | Brush friction torque measuring method and system of brush torque motor |
| CN117030116A (en) * | 2023-10-10 | 2023-11-10 | 北京星河动力装备科技有限公司 | Device and method for measuring rotational inertia of aircraft component |
| CN117030116B (en) * | 2023-10-10 | 2024-02-20 | 北京星河动力装备科技有限公司 | Device and method for measuring rotational inertia of aircraft component |
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