CN111220303A - Disc type hysteresis dynamometer - Google Patents
Disc type hysteresis dynamometer Download PDFInfo
- Publication number
- CN111220303A CN111220303A CN202010196767.1A CN202010196767A CN111220303A CN 111220303 A CN111220303 A CN 111220303A CN 202010196767 A CN202010196767 A CN 202010196767A CN 111220303 A CN111220303 A CN 111220303A
- Authority
- CN
- China
- Prior art keywords
- rotor
- mounting cover
- disc
- hysteresis dynamometer
- sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/24—Devices for determining the value of power, e.g. by measuring and simultaneously multiplying the values of torque and revolutions per unit of time, by multiplying the values of tractive or propulsive force and velocity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
- G01L3/02—Rotary-transmission dynamometers
- G01L3/04—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft
- G01L3/10—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating
- G01L3/101—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means
- G01L3/102—Rotary-transmission dynamometers wherein the torque-transmitting element comprises a torsionally-flexible shaft involving electric or magnetic means for indicating involving magnetic or electromagnetic means involving magnetostrictive means
Abstract
The invention provides a disc type hysteresis dynamometer, which comprises a bottom plate, a speed measuring disc sensor, a speed measuring disc, a shell, a support, a left mounting cover, an inner stator, an outer stator, a rotor combination, a right mounting cover and a coil, wherein the rotor combination comprises a shaft and a rotor, the rotor is embedded in the inner stator, the shaft penetrates through the axis of the rotor, the rotor is disc-shaped, the inner stators on the left side and the right side of the rotor are respectively provided with a tooth groove structure, and a gap between the rotor and the inner stator is formed through the tooth groove structures. The disk hysteresis dynamometer provided by the invention has the advantages of reducing the rotational inertia of the rotor, realizing high-speed rotation of the rotor, overcoming 2% of torque fluctuation of a common disk hysteresis dynamometer and realizing constant torque output.
Description
Technical Field
The invention relates to the field of dynamometers, in particular to a disc type hysteresis dynamometer.
Background
The rotor of the hysteresis dynamometer used at present is of a cup-shaped structure, the stator of the hysteresis dynamometer is of an inner and outer tooth structure, and the inertia moment generated during the test is large.
The magnitude of the moment of the hysteresis dynamometer is proportional to the excitation area, i.e. the generated torque is amplified and the rotor thereof is amplified. When the hysteresis brake is in high-speed operation, the rotor is cup-shaped, so that when the rotor rotates, it can produce an inertia moment, and its external diameter is increased, and its inertia moment is increased, and when the hysteresis brake is in high-speed operation, its rotor is stressed by an outward tension, and the rotor is deformed under the action of tension, in the process the rotor deformation quantity is increased. Because the torque generated by the hysteresis dynamometer has a direct relation with the magnetic gap between the stator and the rotor, the magnetic gap is increasingly smaller than the generated torque. When the magnetic gap is too large, no torque will be generated. The hysteresis brake is the process of converting heat energy into kinetic energy, the rotor generates a large amount of heat during working, the rotor is easier to bend due to the existence of inertia moment when running at high speed, the magnetic gap between the rotor and the stator is changed, and therefore the torque generated by the hysteresis brake is fluctuated. And the hysteresis brake rotor is hollow cup-shaped, which not only wastes materials, but also has complex processing technology and is difficult to process. Due to the existence of inertia moment, the rotation speed of the hysteresis dynamometer is limited. The form and the installation mode of the sensor directly determine the testing precision of the hysteresis dynamometer. In order to solve these problems, the disk hysteresis dynamometer is invented.
Disclosure of Invention
It is an object of the present invention to provide a disc hysteresis dynamometer which addresses one or more of the above-mentioned problems of the prior art.
The invention provides a disc type hysteresis dynamometer, which comprises a bottom plate, a speed measuring disc sensor, a speed measuring disc, a shell, a support, a left mounting cover, an inner stator, an outer stator, a rotor combination, a right mounting cover and a coil, wherein the rotor combination comprises a shaft and a rotor, the rotor is embedded in the inner stator, the shaft penetrates through the axis of the rotor, the rotor is disc-shaped, the inner stators on the left side and the right side of the rotor are respectively provided with a tooth groove structure, and a gap between the rotor and the inner stator is formed through the tooth groove structures.
In certain embodiments, the rotor is a thin sheet rotor.
In some embodiments, the two spline structures are identical in structure and each comprise a plurality of grooves uniformly distributed circumferentially about the shaft.
In some embodiments, the two gullet structures are staggered.
In some embodiments, the coil is wound on the inner stator, the outer stator is arranged outside the coil, the left end and the right end of the outer stator are respectively connected with the left mounting cover and the right mounting cover, the left mounting cover and the right mounting cover are sleeved on the shaft, the left mounting cover and the right mounting cover are both connected with the support, and the bottom of the support is connected with the bottom plate.
In some embodiments, a space ring is provided between each of the inner and outer stators and the coil.
In some embodiments, the left mounting cover and the right mounting cover are respectively provided with a noise eliminator, the left mounting cover and the right mounting cover are both provided with air outlets, and the noise eliminator is arranged corresponding to the air outlets.
In some embodiments, the cross section of each of the muffling devices is U-shaped, two muffling devices are symmetrically distributed, each of the muffling devices includes a first muffling plate and a second muffling plate, a through hole is formed in the second muffling plate corresponding to the air outlet, and the distance between the second muffling plate and the rotor is smaller than the distance between the first muffling plate and the rotor.
In some embodiments, left side installation lid and right side installation lid are worn out respectively to the both ends of axle, and the one end of wearing out left side installation lid on the axle is connected and is tested the speed dish, the below of testing the speed dish is equipped with the speed dish sensor, tests the speed dish sensor and leg joint, tests the epaxial cover of speed between dish and the left side installation lid and is equipped with the sensor, is equipped with the screw rod bearing on the support, sensor and screw rod bearing contact.
In some embodiments, the moment arm of the sensor is in contact with a central location of the screw bearing.
The disc type hysteresis dynamometer provided by the invention has the advantages that:
1) the rotor adopts a disc-shaped thin-sheet rotor, so that the rotational inertia of the rotor is greatly reduced, and meanwhile, the cup-shaped rotor structure is removed through the structural design, so that the high-speed rotation of the rotor is realized, and the highest speed can reach about 30000 r/min;
2) the gap between the rotor and the stator is formed by the two annular tooth groove structures, stable torque can be formed under the action of small exciting current, 2% torque fluctuation of a common disc type hysteresis dynamometer is overcome, and constant torque is output;
3) the size, shape and depth of the designed first tooth groove structure and the second tooth groove structure are the same, so that the consistency of a magnetic field generated under the action of exciting current can be ensured, and the torque is stable.
Drawings
Fig. 1 is a front cross-sectional view of a disk hysteresis dynamometer in one embodiment of the present invention;
FIG. 2 is a partial cross-sectional side view of a disk hysteresis dynamometer in one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of an inner stator according to an embodiment of the present invention;
FIG. 4 is a schematic cross-sectional view of a muffler assembly according to an embodiment of the present invention;
FIG. 5 is a schematic structural view of a first muffler plate according to an embodiment of the present invention;
fig. 6 is a schematic structural view of a second muffling plate in an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 3, a disk hysteresis dynamometer includes a bottom plate 1, a tachometer disk sensor 3, a tachometer disk 7, a housing 26, a bracket, a left mounting cover 10, an inner stator 13, an outer stator 11, a rotor assembly 15, a right mounting cover 16 and a coil 19,
the bracket comprises a left bracket 9 and a right bracket 20, the left bracket 9 is connected with the bottom plate 1 through a first screw 2, the right bracket 20 is connected with the bottom plate 1 through a second screw 21,
the rotor assembly 15 comprises a shaft and a rotor, the rotor adopts a disc-shaped thin-sheet rotor, the shaft passes through the axis of the rotor, the rotor is embedded in an inner stator 13, a first bearing 17 is arranged between the inner stator 13 and the shaft, the inner stators 13 on the left side and the right side of the rotor are respectively provided with a tooth space structure 27, the two tooth space structures 27 are distributed in a staggered way, a gap between the rotor and the inner stator 13 is formed through the tooth space structures 27, when a coil is electrified, a magnetic field is generated in the gap, so that the rotor rotates between the left stator and the right stator to generate a hysteresis effect, as shown in figure 3, the two tooth space structures 27 have the same structure and are composed of a plurality of grooves which are annularly and uniformly distributed by taking the shaft as the center, the gaps on the left side and the,
a coil 19 is wound on the inner stator 13, an outer stator 11 is arranged outside the coil 19, a space ring 18 is arranged between the inner stator 13, the outer stator 11 and the coil 19, the space ring 18 plays a role of magnetic isolation, the left end and the right end of the outer stator 11 are respectively connected with a left mounting cover 10 and a right mounting cover 16 through a third screw 12, the left mounting cover 10 and the right mounting cover 16 are sleeved on a shaft, the left mounting cover 10 is mounted on a left bracket 9, the right mounting cover 16 is mounted on a right bracket 20, second bearings 8 are respectively arranged between the left mounting cover 10 and the left bracket 9 and between the right mounting cover 16 and the right bracket 20, a silencing device 14 is respectively arranged on the left mounting cover 10 and the right mounting cover 16, air outlets are respectively arranged on the left mounting cover 10 and the right mounting cover 16, as shown in fig. 4 to 6, the section of the silencing device 14 is U-shaped, the two silencing devices 14 are symmetrically distributed about the central point between the two silencing devices 14, the silencer 14 comprises a first silencer 141 and a second silencer 142, a through hole 143 is formed in the second silencer 142 corresponding to the air outlet, the center of the through hole 143 and the center of the air outlet are on the same straight line, the distance between the second silencer 142 and the rotor is smaller than the distance between the first silencer 141 and the rotor, namely the distance between the second silencer 142 in the left silencer 14 and the left mounting cover 10 is smaller than the distance between the first silencer 141 and the left mounting cover 10, the distance between the second silencer 142 in the right silencer 14 and the right mounting cover 16 is smaller than the distance between the first silencer 141 and the right mounting cover 16, and the silencer 14 changes the direction of air blowing out during air cooling and plays a role in noise elimination;
the both ends of axle are worn out left installation lid 10 and right installation lid 16 respectively, the one end of wearing out left installation lid 10 on the axle is inserted in shell 26, shell 26 is connected with left installation lid 10 and left socle 9, the epaxial cover that inserts in the shell 26 is equipped with speed measuring disk 7, the below of speed measuring disk 7 is equipped with speed measuring disk sensor 3, speed measuring disk sensor 3 is connected with the left side terminal surface of left socle 9, be equipped with auxiliary cushion 4 between speed measuring disk sensor 3 and the left socle 9, the epaxial cover that tests between speed measuring disk 7 and the left installation lid 10 is equipped with sensor 28, sensor 28's casing sets up on left installation lid 10, be equipped with screw bearing 22 on the left socle 9, sensor 28's the arm of force and the central point of screw bearing 22 contact, wherein sensor 28 adoption is weighing sensor, survey the moment of torsion through. When the sensor 28 has a tendency of forward movement under the action of the force of the movement potential of the disc type hysteresis dynamometer, the friction resistance is reduced by the arrangement of the screw bearing 22, and the force arm of the sensor 28 is always in contact with the central position of the screw bearing 22, so that the torque measured by the disc type hysteresis dynamometer is more accurate.
In this embodiment, the center pin of rotor and the center pin of axle are on same straight line, wherein fix a position after rotor and axle rough machining through fixing from centering chuck between rotor and the axle, then fix rotor and chuck into an organic whole through technologies such as welding, and the whole is carried out fine machining and is effectually guaranteed the concentricity between rotor and the axle again, is favorable to the rotor to realize high-speed operation.
In this embodiment, the speed measuring disk 7 and the shaft can be connected and fixed by the hexagon socket flat end set screw 5 and the circular nut-B type 6 with the hole on the end surface.
In the present embodiment, socket cap head cap screws may be used as the first screw 2, the second screw 21, and the third screw 12.
In the present embodiment, both the first bearing 17 and the second bearing 8 may be deep groove ball bearings.
When the coil is energized, a magnetic field is generated in the gap, causing the rotor to develop hysteresis effects. When the hysteresis rotor rolls under the action of an external force, an additional torque is initiated. The torque is controlled by adjusting the exciting current. The torque is only related to the magnitude of the exciting current and is not related to the rotating speed, and non-contact torque transmission is completed. In the disk hysteresis brake in the present embodiment, a gap is left between the rotor and the stator, and when the coil is energized, a magnetic field is generated in the gap, so that the rotor rotates between the left and right stators to generate a hysteresis effect. The rotor is in a thin disc shape, so that the rotor is light in weight, small in rotational inertia and suitable for high-speed rotation. When the hysteresis rotor rolls under the action of an external force, an additional torque is initiated.
The foregoing is only a preferred form of the invention and it should be noted that several similar variations and modifications could be made by one skilled in the art without departing from the inventive concept and these should also be considered within the scope of the invention.
Claims (10)
1. The utility model provides a disk hysteresis dynamometer, includes bottom plate (1), speed measuring disk sensor (3), speed measuring disk (7), shell (26), support, left side installation lid (10), inner stator (13), outer stator (11), rotor combination (15), right side installation lid (16) and coil (19), including axle and rotor in rotor combination (15), the rotor inlays and establishes in inner stator (13), the axle center of rotor is passed to the axle, a serial communication port, the rotor is the disc, be equipped with a tooth's socket structure (27) on inner stator (13) of the rotor left and right sides respectively, form the clearance between rotor and inner stator (13) through the tooth's socket structure.
2. A disc hysteresis dynamometer according to claim 1, characterized in that the rotor is a thin-sheet rotor.
3. A disc hysteresis dynamometer according to claim 1, wherein the two cogging structures (27) are identical and each consist of a plurality of grooves distributed uniformly circumferentially about the axis.
4. A disc hysteresis dynamometer according to claim 1 or 3, characterized in that the two tooth-slot structures (27) are distributed with a staggered arrangement.
5. The disc type hysteresis dynamometer of claim 1, wherein the inner stator (13) is wound with a coil (19), an outer stator (11) is arranged outside the coil (19), the left end and the right end of the outer stator (11) are respectively connected with a left mounting cover (10) and a right mounting cover (16), the left mounting cover (10) and the right mounting cover (16) are sleeved on the shaft, the left mounting cover (10) and the right mounting cover (16) are both connected with a bracket, and the bottom of the bracket is connected with the bottom plate (1).
6. A disc hysteresis dynamometer according to claim 5, characterized in that space rings (18) are provided between the inner stator (13) and the outer stator (11) and the coils (19).
7. A disc type hysteresis dynamometer according to claim 5, wherein a silencer (14) is disposed on each of the left mounting cover (10) and the right mounting cover (16), air outlets are disposed on each of the left mounting cover (10) and the right mounting cover (16), and the silencer (14) is disposed corresponding to the air outlets.
8. A disc hysteresis dynamometer according to claim 7, wherein the cross section of each of said muffling devices (14) is U-shaped, two of said muffling devices (14) are symmetrically distributed, each of said muffling devices (14) comprises a first muffling plate (141) and a second muffling plate (142), a through hole (143) is formed in the second muffling plate (142) corresponding to the air outlet, and the distance between the second muffling plate (142) and the rotor is smaller than the distance between the first muffling plate (141) and the rotor.
9. The disc type hysteresis dynamometer according to claim 1 or 5, wherein two ends of the shaft respectively penetrate through the left mounting cover (10) and the right mounting cover (16), one end of the shaft penetrating through the left mounting cover (10) is connected with the tachometer disc (7), a tachometer disc sensor (3) is arranged below the tachometer disc (7), the tachometer disc sensor (3) is connected with a support, a sensor (28) is sleeved on the shaft between the tachometer disc (7) and the left mounting cover (10), a screw bearing (22) is arranged on the support, and the sensor (28) is in contact with the screw bearing (22).
10. A disc hysteresis dynamometer according to claim 9, characterized in that the moment arm of the sensor (28) is in contact with the central position of the screw bearing (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010196767.1A CN111220303A (en) | 2020-03-19 | 2020-03-19 | Disc type hysteresis dynamometer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010196767.1A CN111220303A (en) | 2020-03-19 | 2020-03-19 | Disc type hysteresis dynamometer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111220303A true CN111220303A (en) | 2020-06-02 |
Family
ID=70826419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010196767.1A Pending CN111220303A (en) | 2020-03-19 | 2020-03-19 | Disc type hysteresis dynamometer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111220303A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544055A (en) * | 2021-12-29 | 2022-05-27 | 江苏兰菱机电科技有限公司 | High-power hysteresis dynamometer |
-
2020
- 2020-03-19 CN CN202010196767.1A patent/CN111220303A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114544055A (en) * | 2021-12-29 | 2022-05-27 | 江苏兰菱机电科技有限公司 | High-power hysteresis dynamometer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3602732B2 (en) | motor | |
| CN2825148Y (en) | Metering device for wire drawing machine | |
| US6307295B1 (en) | Spindle motor and complex bearing assembly for use with the spindle motor | |
| US8720271B2 (en) | Electromagnetic disc drive wheel balancer | |
| CN107989896A (en) | Axial and radial integration magnetic levitation bearing system | |
| CN104697686A (en) | Small-sized ultra-high-speed motor test loading device | |
| JP2021121173A (en) | motor | |
| CN111220303A (en) | Disc type hysteresis dynamometer | |
| CN113390546B (en) | Dynamometer based on moment measuring device | |
| CN211291826U (en) | Disc type hysteresis dynamometer | |
| CN108414169A (en) | A kind of high speed rotation shafting dynamic axial load stiffness test method and device | |
| JP3448416B2 (en) | Built-in motor | |
| US6351043B1 (en) | Dynamically balanced small electric motor | |
| CN113765301A (en) | Magnetic suspension motor and method for improving dynamic balance debugging accuracy | |
| CN107276305B (en) | Rotor braking device | |
| CN108398569B (en) | Rolling type permanent magnet rotation acceleration sensor and measuring method and assembling method thereof | |
| CN109579981A (en) | A kind of vibration monitoring device and method of bush(ing) bearing | |
| CN104483510A (en) | Measurement rotation acceleration sensor and measurement method | |
| JP2004324895A (en) | Static pressure magnetic combined bearing | |
| JPH02223361A (en) | Polygon scanner motor and its manufacture | |
| CN220342133U (en) | Rotor structure and motor | |
| JPH04351979A (en) | Test apparatus of linear motor | |
| CN111277112A (en) | Magnetic hysteresis brake | |
| JPS63148846A (en) | Bearing mechanism for motor | |
| CN215178485U (en) | Decoupling mechanism for large displacement vibration test and test device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |