CN109387360B - Variable inertia flywheel system of fixed test bed - Google Patents
Variable inertia flywheel system of fixed test bed Download PDFInfo
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- CN109387360B CN109387360B CN201811476700.2A CN201811476700A CN109387360B CN 109387360 B CN109387360 B CN 109387360B CN 201811476700 A CN201811476700 A CN 201811476700A CN 109387360 B CN109387360 B CN 109387360B
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- 238000012360 testing method Methods 0.000 title claims abstract description 21
- 238000005096 rolling process Methods 0.000 claims description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a variable inertia flywheel system of a fixed test bed, which comprises a first flywheel, a second flywheel, a third flywheel and a rotating shaft, wherein the second flywheel is fixedly connected with the rotating shaft in an interference fit manner; the first flywheel, the second flywheel and the third flywheel are all disc-shaped structures; bosses are arranged on the inner side end surfaces of the first flywheel and the third flywheel, and pits are arranged on the two end surfaces of the second flywheel; when the flywheel system is required to provide small rotational inertia, only the second flywheel rotates along with the rotating shaft, and the first flywheel and the third flywheel are placed on the flywheel storage seat; when the rotational inertia of a flywheel system needs to be increased, the first flywheel or the third flywheel is connected with the second flywheel to rotate together with the rotating shaft; the variable inertia flywheel system of the fixed test bed can provide various different flywheel rotational inertias for testing different working conditions, the size of the flywheel rotational inertias is not limited, and the variable inertia flywheel system can be optimally configured according to actual requirements.
Description
Technical Field
The invention relates to a variable inertia flywheel system of a fixed test bed.
Background
The same test bed often needs to simulate a plurality of different loads, the loads are simulated by using the flywheel, and the aim of changing the loads is fulfilled by changing the rotational inertia of the flywheel. The flywheel system is not affected by the rotation speed and the moment of inertia, and is safe and reliable to operate. The existing variable inertia flywheel structure is difficult to meet the requirement.
Disclosure of Invention
The invention provides a fixed test bed variable inertia flywheel system, which correspondingly increases and decreases the number of flywheels to simulate different loads according to different test working condition requirements. The technical scheme of the invention is as follows:
the variable inertia flywheel system of the positioning test bed mainly comprises a first flywheel, a second flywheel, a third flywheel and a rotating shaft, wherein the second flywheel is fixedly connected with the rotating shaft in an interference fit manner; the first flywheel comprises a first flywheel disc, the second flywheel comprises a second flywheel disc, and the third flywheel comprises a third flywheel disc; the inner side end surfaces of the first flywheel and the third flywheel are respectively provided with a boss, and the two end surfaces of the second flywheel are respectively provided with a pit. When the flywheel system is required to provide small rotational inertia, only the second flywheel rotates along with the rotating shaft, and at the moment, the first flywheel and the third flywheel are respectively placed on the first flywheel storage seat and the second flywheel storage seat. When the rotational inertia of the flywheel system needs to be increased, the first flywheel or the third flywheel is selected to be connected with the second flywheel in a matching way to rotate along with the rotating shaft. The design of the invention is described by taking the example that the third flywheel is connected with the second flywheel so that the third flywheel and the second flywheel rotate together, and the rest are the same. The method comprises the following steps: when the test bed is static, the third flywheel is moved by the crane, so that the boss on the inner side end surface of the third flywheel is matched with the pit on the corresponding end surface of the second flywheel, and the second screw is used for connecting the third flywheel with the second flywheel through the stepped through hole II and the threaded hole. When the rotating shaft rotates, the second flywheel drives the third flywheel to rotate together.
Further, the first flywheel, the second flywheel and the third flywheel are all disc-shaped structures; and the second flywheel is positioned between the first flywheel and the third flywheel. The first flywheel and the third flywheel are respectively provided with a stepped through hole and a lifting hole, and the lifting holes are respectively arranged on the outer circumferences of the first flywheel and the third flywheel along the radial direction of the flywheel; and threaded holes are formed in two end faces of the second flywheel. When the second flywheel drives the first flywheel to rotate together, the first flywheel is in clearance fit with the rotating shaft; similarly, when the second flywheel drives the third flywheel to rotate together, the third flywheel is in clearance fit with the rotating shaft.
Further, the variable inertia flywheel system of the fixed test bed further comprises a flywheel storage seat and a bearing. The first flywheel storage seat and the second flywheel storage seat are respectively used for storing the first flywheel and the third flywheel when the first flywheel and the third flywheel do not rotate together with the second flywheel. The bearing is used for supporting the rotating shaft and enabling the rotating shaft to rotate only.
Further, the variable inertia flywheel system of the fixed test bed further comprises a crane and a crane bracket. The crane comprises hanging rings, hanging hooks, a frame plate, nuts, limiting plates, bolts, pin shafts and wheels. The lifting ring can be connected to the lifting hole of the first flywheel or the third flywheel through threads respectively and is connected with the lifting hook. The lifting hook is provided with a rotation stopping block, the frame plate is provided with a guide hole, and the rotation stopping block is matched with the guide hole and used for limiting the rotation of the lifting hook; the limiting plate is arranged on the frame plate through the two bolts and used for limiting the up-and-down movement of the nut; the lifting hook is connected with the nut through threads; rotating the nut may move the hook up and down. The crane bracket is used for supporting the crane, grooves are formed in two side beams of the crane bracket, and the wheels can move back and forth on the grooves.
The beneficial effects of the design of the invention are as follows: 1. the same test bed can provide various different flywheel rotational inertias for testing different working conditions; 2. the rotational inertia of the flywheel is not limited, and the flywheel can be optimally combined according to the actual simulated load; 3. the use is convenient: the system has simple structure and is safe and reliable.
Drawings
FIG. 1 is an exploded schematic view of a three-dimensional structure of the design of the present invention;
FIG. 2 is an exploded view of the crane in the design of the present invention;
FIG. 3 is a schematic bottom view of the frame plate in accordance with the present invention;
fig. 4 is a schematic structural view of a limiting plate in the design of the present invention.
In the accompanying drawings: 1. the flywheel comprises a first flywheel, a step-shaped through hole I, a lifting hole II, a second flywheel, a threaded hole 21, a third flywheel, a step-shaped through hole II, a lifting hole 32, a rotary shaft 4, a screw I, a screw II, a flywheel storage seat I, a flywheel storage seat II, a bearing I, a bearing II, a bearing 8, a crane bracket 9, a crane, a lifting ring 91, a lifting hook 92, a lifting hook 921, a rotation stopping block 93, a frame plate 931, a guide hole 94, a nut 95, a limiting plate 96, a bolt 97, a pin shaft 98 and a wheel.
Detailed Description
As shown in the attached drawings, all the components in the drawings are simple in structure, reliable and convenient to assemble.
The number of the used flywheels is not limited to three flywheels, and the flywheels with different rotational inertia can be added on the rotating shaft 4 according to actual needs.
The specific implementation mode of the fixed test bed variable inertia flywheel system is as follows:
the two ends of the rotating shaft 4 are respectively supported on the bearing seats by a first bearing 71 and a second bearing 72. The crane brackets 8 with grooves on both side beams are arranged on the fixed support. The limiting plate 95 is mounted on the carriage plate 93 by two bolts 96. The crane 9 is supported on 4 wheels 98 through 4 pin shafts 97, and rolling bearing inner rings in the 4 wheels 98 are respectively connected with the 4 pin shafts 97 in an interference fit manner.
When the flywheel system is required to provide small rotational inertia under the test working condition, only the second flywheel 2 rotates along with the rotating shaft 4, and the first flywheel 1 and the third flywheel 3 are respectively stored on the first flywheel storage seat 61 and the second flywheel storage seat 62.
When the flywheel system is required to increase the rotational inertia under the test working condition, the description is given by taking the example that the third flywheel 3 is matched and connected with the second flywheel 2 so that the third flywheel and the second flywheel rotate together, and the rest is the same. When the stationary test bed is positioned, the lifting ring 91 is in threaded connection with the lifting hole 32 of the third flywheel 3 and then is matched with the lifting hook 92; rotating the nut 94 clockwise, the hook 92 lifts the third flywheel 3 vertically upwards; by rotating the nut 94 counterclockwise, the third flywheel 3 moves vertically downward together with the hook 92. The rotation stop block 921 on the hook 92 cooperates with the guide hole 931 of the carriage plate 93 to limit rotation of the hook 92; the limiting plate 95 is mounted on the carriage plate 93 through two bolts 96 to limit the up-and-down movement of the nut 94; the lifting hook 92 is connected with the nut 94 by screw threads; thus, rotating the nut 94 only moves the hook 92 up and down. The third flywheel 3 is positioned at a proper height by rotating the nut 94, the crane 9 slowly moves in the direction of approaching the second flywheel 2 by hanging the third flywheel 3 on the crane bracket 8, the boss on the inner side end surface of the third flywheel 3 is matched with the pit on the corresponding end surface of the second flywheel 2, and then the second screw 52 is used for fixedly connecting the third flywheel 3 with the second flywheel 2 through the stepped through hole 31 and the threaded hole 21.
When the first flywheel 1 fixedly connected with the second flywheel 2 needs to move onto the first flywheel storage seat and does not rotate along with the second flywheel 2, in the static state of the positioning test bed, the lifting ring 91 is connected with the lifting hole 12 of the first flywheel 1 through threads, the ring on the lifting ring 91 is matched with the lifting hook 92 to lift the first flywheel 1, then all 4 screws 51 are dismounted, the crane 9 is slowly moved on the crane bracket 8 in a direction away from the second flywheel 2 by lifting the first flywheel 1, the first flywheel 1 is positioned right above the first flywheel storage seat 61, and finally the nut 94 is rotated to enable the first flywheel 1 to slowly fall on the first flywheel storage seat 61. The third flywheel 3 is moved to the second flywheel storage seat 62 in the same manner as the first flywheel 1 is moved to the first flywheel storage seat 61.
Claims (1)
1. The variable inertia flywheel system of the positioning test bed is characterized by comprising a first flywheel (1), a second flywheel (2), a third flywheel (3), a rotating shaft (4), first screws, second screws (51 and 52), first flywheel storage seats, second flywheel storage seats (61 and 62), first bearings, second bearings (71 and 72), a crane bracket (8) and a crane (9); the second flywheel (2) is fixedly connected with the rotating shaft (4) in interference fit; the first flywheel (1), the second flywheel (2) and the third flywheel (3) are respectively provided with a step-shaped through hole I (11), a threaded hole (21) and a step-shaped through hole II (31); the first flywheel (1) and the third flywheel (3) are respectively provided with lifting holes (12, 32); the first flywheel (1) comprises a first flywheel disc, the second flywheel (2) comprises a second flywheel disc, and the third flywheel (3) comprises a third flywheel disc; bosses are arranged on the inner side end surfaces of the first flywheel (1) and the third flywheel (3), and pits are formed on the two end surfaces of the second flywheel (2); the boss of the inner side end surface of the third flywheel (3) is matched with the pit of the corresponding end surface of the second flywheel (2) through the movement of the crane (9), and the second screw (52) is used for connecting the third flywheel (3) with the second flywheel (2) through the second stepped through hole (31) and the threaded hole (21); the first flywheel (1) is connected with the second flywheel (2) in a matching way, and the third flywheel (3) is connected with the second flywheel (2) in a matching way; when the flywheel system is required to provide small rotational inertia, only the second flywheel (2) rotates along with the rotating shaft (4), and the first flywheel (1) and the third flywheel (3) are respectively placed on the first flywheel storage seat (61) and the second flywheel storage seat (62); when the rotational inertia of the flywheel system needs to be increased, the first flywheel (1) or the third flywheel (3) is selected to be connected with the second flywheel (2) in a matching way so as to rotate along with the rotating shaft (4); the first flywheel (1), the second flywheel (2) and the third flywheel (3) are all disc-shaped structures; and the second flywheel (2) is located between the first flywheel (1) and the third flywheel (3); the lifting holes (12, 32) are respectively arranged on the outer circumferences of the first flywheel (1) and the third flywheel (3) along the radial direction of the flywheel; when the second flywheel (2) drives the first flywheel (1) to rotate together, the first flywheel (1) and the rotating shaft (4) are in clearance fit; similarly, when the second flywheel (2) drives the third flywheel (3) to rotate together, the third flywheel (3) and the rotating shaft (4) are in clearance fit; the crane (9) comprises a lifting ring (91), a lifting hook (92), a frame plate (93), a nut (94), a limiting plate (95), a bolt (96), a pin shaft (97) and wheels (98); the lifting ring (91) can be connected with the lifting holes (12, 32) through threads, and a ring on the lifting ring (91) can be matched with the lifting hook (92); the hanging ring (91) is used for connecting the first flywheel (1) or the third flywheel (3) with the hanging hook (92); the lifting hook (92) is provided with a rotation stopping block (921), the frame plate (93) is provided with a guide hole (931), and the rotation stopping block (921) is matched with the guide hole (931) and used for limiting rotation of the lifting hook (92); the limiting plate (95) is arranged on the frame plate (93) through the two bolts (96) and is used for limiting the up-and-down movement of the nut (94); the lifting hook (92) is connected with the nut (94) through threads; rotating the nut (94) moves the hook (92) up and down; grooves are formed in two side beams of the crane bracket (8) and used for supporting the crane (9), and the wheels (98) can move back and forth on the grooves; the crane (9) is supported on 4 wheels (98) through 4 pin shafts (97), and rolling bearing inner rings in the 4 wheels (98) are in interference fit with the 4 pin shafts (97).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811476700.2A CN109387360B (en) | 2018-12-05 | 2018-12-05 | Variable inertia flywheel system of fixed test bed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811476700.2A CN109387360B (en) | 2018-12-05 | 2018-12-05 | Variable inertia flywheel system of fixed test bed |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109387360A CN109387360A (en) | 2019-02-26 |
| CN109387360B true CN109387360B (en) | 2023-12-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811476700.2A Active CN109387360B (en) | 2018-12-05 | 2018-12-05 | Variable inertia flywheel system of fixed test bed |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109827708A (en) * | 2019-03-27 | 2019-05-31 | 中国北方车辆研究所 | A kind of mechanical inertia case apparatus for electrical inertia calibration |
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