CN116398592A - Mechanical double-speed-change soft start speed changer - Google Patents
Mechanical double-speed-change soft start speed changer Download PDFInfo
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- CN116398592A CN116398592A CN202310405825.0A CN202310405825A CN116398592A CN 116398592 A CN116398592 A CN 116398592A CN 202310405825 A CN202310405825 A CN 202310405825A CN 116398592 A CN116398592 A CN 116398592A
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- transmission
- speed
- planet carrier
- sun gear
- soft start
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- 230000005540 biological transmission Effects 0.000 claims abstract description 71
- 230000007246 mechanism Effects 0.000 claims abstract description 11
- 230000008859 change Effects 0.000 claims description 11
- 238000000034 method Methods 0.000 claims description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000001276 controlling effect Effects 0.000 claims description 3
- 230000009977 dual effect Effects 0.000 claims 6
- 230000004044 response Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000006247 magnetic powder Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/44—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion using gears having orbital motion
- F16H3/62—Gearings having three or more central gears
- F16H3/64—Gearings having three or more central gears composed of a number of gear trains, the drive always passing through all the trains, each train having not more than one connection for driving another train
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/02—Gearboxes; Mounting gearing therein
- F16H57/023—Mounting or installation of gears or shafts in the gearboxes, e.g. methods or means for assembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H57/00—General details of gearing
- F16H57/08—General details of gearing of gearings with members having orbital motion
- F16H57/10—Braking arrangements
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention discloses a mechanical double-speed-change soft start speed changer in the technical field of speed changers, which consists of two sets of WW-type planetary gear transmission systems in series, wherein the speed changer comprises an input shaft, a sun gear, a transmission mechanism, a transmission shaft, an output shaft, a planet carrier and a magneto-rheological brake for controlling the planet carrier; the response speed is high, and the control precision is high; stable transmission, high transmission efficiency and strong bearing capacity; safe, reliable and easy to operate; can realize soft start and soft stop and has overload protection function.
Description
Technical Field
The invention relates to the technical field of speed changers, in particular to a mechanical double-speed-change soft start speed changer.
Background
At present, the mechanical soft start speed variator at home and abroad mainly comprises an oil film clutch, a hydraulic coupler, a differential variable frequency stepless speed regulating device, a CST transmission device and the like.
The oil film clutch is a mechanical and hydraulic combined soft start speed regulator for transmitting power through an oil film between a driving friction plate and a driven friction plate based on Newton internal friction principle. The sealing performance is high, the processing is difficult, the manufacturing cost is high, if the sealing is improper, oil leakage or oil pollution is easy to cause, the transmission precision is affected, the control and lubrication oil way is complex, the control and maintenance are inconvenient, and the cost is high.
A fluid coupling is a mechanical soft start device that relies on the energy change of the working fluid to transfer power. The hydraulic coupler is easy to cause oil leakage of equipment and has high failure rate; the power loss exists, so that the temperature of the liquid in the working cavity is too high, and a large amount of cooling liquid is required to be cooled; poor speed regulation precision, large installation space and low overall efficiency.
The differential variable-frequency stepless speed regulator is a novel electromechanical controllable soft starting device driven by planetary gear train, and its product mainly includes Best soft starting system. The heat dissipation performance is poor, the self-locking angle can not run at low speed for a long time and is changed along with the speed of the worm wheel, and the worm wheel and worm drive reverse self-locking is problematic and is easy to glue and lose efficacy.
The CST transmission is a planetary gear transmission with feedback control combined with a hydraulic control system, developed by Rockwell Dodge, usa. The CST transmission device has large heating value, high requirement on oil quality, complex control, high price and high maintenance cost.
The transmission mode in the prior art is NGW type planetary gear transmission, and the braking mode is oil film clutch and magnetic powder brake braking. However, the prior art has a plurality of defects, the NGW type transmission mode is internal gear transmission, the manufacturing cost is high, and the required braking torque is large; after the starting is finished, the transmission ratio is fixed, and the speed cannot be regulated. The oil film clutch braking mode is easy to generate oil leakage, and has high requirements on oil quality, complex control, high price and high maintenance cost. The magnetic powder brake is easy to wear in the working process, influences the use, and has unstable output and poor heat dissipation performance. Based on the above, the present invention has devised a mechanical double-speed soft start transmission to solve the above-mentioned problems.
Disclosure of Invention
The invention aims to provide a mechanical double-speed-change soft start speed changer, which solves the problems in the background art, and aims to reduce the manufacturing cost of the mechanical double-speed-change soft start speed changer, make the control and the use simpler and more convenient, and realize speed change adjustability after the starting is completed.
In order to achieve the above purpose, the present invention provides the following technical solutions: a mechanical double-speed soft start speed changer is formed by connecting two sets of WW type planetary gear transmission systems in series, and comprises an input shaft sun gear, a planet gear, a transmission shaft, an output shaft, a planet carrier and a magneto-rheological brake for controlling the planet carrier;
the first magnetorheological brake control planet carrier and the second magnetorheological brake control planet carrier are connected through transmission shafts.
Preferably, the magneto-rheological brake adopts a multi-disc and/or coil built-in structure.
Preferably, the planet wheel is arranged on the planet carrier, and the sun wheel is meshed with the planet wheel for transmission.
Preferably, the sun gear comprises a sun gear I, a sun gear II, a sun gear III and a sun gear IV, the transmission shaft is respectively connected with the sun gear II and the sun gear III, the sun gear I is connected with the sun gear II, and the sun gear III is connected with the sun gear IV.
Preferably, the planetary gears are provided with two groups, and are respectively arranged on the first planetary gear carrier and the second planetary gear carrier, and each group of planetary gears consists of a plurality of planetary gears.
Preferably, the first sun gear and the second sun gear are respectively in meshing connection with the planetary gear set on the first planet carrier, and the third sun gear and the fourth sun gear are respectively in meshing connection with the planetary gear set on the second planet carrier.
A method for starting and shifting a mechanical double-shifting soft start transmission comprises the following steps
Step 1: starting a motor, wherein an input shaft drives a sun gear to rotate, the first magnetorheological brake does not work, the first planet carrier is in a free rotation state, the second magnetorheological brake completely brakes the second planet carrier, and a transmission system of a planetary gear set on the second planet carrier is equivalent to a speed reducer with a fixed transmission ratio;
step 2: the motor speed is increased to reach the rated speed, at the moment, the magnetorheological brake starts to work, the braking torque of the first planet carrier is controlled to be gradually increased according to a set parameter curve, and the speed is gradually reduced, so that the speed of the output shaft 13 is gradually increased, and the load is driven to start according to a set starting mode;
step 3: the first planetary gear transmission system corresponds to a speed reducer with a fixed transmission ratio, and at the moment, the no-load soft start process of the motor is finished;
step 4: and regulating the braking torque of the magneto-rheological brake II so as to change the rotating speed of the output shaft and realize speed change.
Compared with the prior art, the invention has the beneficial effects that:
the WW type planetary gear transmission system is arranged for series connection, the starting acceleration is irrelevant to the load and is adjustable in a larger range, and the speed change can be realized after the starting is finished.
According to the invention, the sun wheel and the planet wheel are engaged for transmission in a matched manner, so that the speed change response speed is high, the control precision is high, the transmission is stable and efficient, and the bearing capacity is strong; the method has the characteristics of safety, reliability and simplicity in operation;
the invention controls the corresponding planet carrier through the independent magneto-rheological brake, can realize soft start and soft stop, has the overload protection function, has smaller required braking torque and is simple to control;
the invention adopts external gear transmission, and has low manufacturing cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the structural principle of the present invention.
Fig. 2 is a schematic perspective view of the axial structure of the present invention.
Fig. 3 is a schematic diagram of the front view structure of the present invention.
Fig. 4 is a schematic side view of the present invention.
In the drawings, the list of components represented by the various numbers is as follows:
1-transmission mechanism I, 2-transmission mechanism II, 3-planet carrier I, 4-planet carrier II, 5-sun gear I, 6-sun gear II, 7-sun gear III, 8-sun gear IV, 9-magneto-rheological brake I, 10-magneto-rheological brake II, 11-input shaft, 12-transmission shaft, 13-output shaft.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-4, the present invention provides a technical solution: the mechanical double-speed soft start transmission consists of two sets of WW planetary gear transmission systems in series, and comprises an input shaft 11, a sun gear (comprising a first sun gear 5, a second sun gear 6, a third sun gear 7 and a fourth sun gear 8), a transmission mechanism (comprising a first transmission mechanism 1 and a second transmission mechanism 2), a transmission shaft 12, an output shaft 13, a planet carrier (comprising a first planet carrier 3 and a second planet carrier 4) and a magneto-rheological brake (comprising a first magneto-rheological brake 9 and a second magneto-rheological brake 10) for controlling the planet carrier.
The planet wheel is arranged on the planet carrier, and the sun wheel is meshed with the planet wheel for transmission. The sun gear comprises a first sun gear 5, a second sun gear 6, a third sun gear 7 and a fourth sun gear 8, wherein a transmission shaft 12 is respectively connected with the second sun gear 6 and the third sun gear 7, the first sun gear 5 is connected with the second sun gear 6, and the third sun gear 7 is connected with the fourth sun gear 8.
The magneto-rheological brake adopts a multi-disc and/or coil built-in structure. The input shaft 11 is connected with the first sun gear 5, the output shaft 13 is connected with the fourth sun gear 8, the two groups of planetary gear transmission systems are connected through the transmission shaft 12, the first magnetorheological brake 9 controls the first planet carrier 3, and the second magnetorheological brake 10 controls the second planet carrier 4.
The planetary carrier transmission mechanism is provided with two groups which are respectively arranged on the first planetary carrier 3 and the second planetary carrier 4, and each group of transmission mechanism consists of three planetary gears.
The first sun gear and the second sun gear are respectively in meshing connection with the planetary gear set on the first planet carrier, and the third sun gear and the fourth sun gear are respectively in meshing connection with the planetary gear set on the second planet carrier
The invention relates to a working principle of a mechanical double-speed soft start speed changer:
when the motor is started, the magnetorheological brake II 10 completely brakes the planet carrier II 4, the second group of planetary gear transmission system is equivalent to a speed reducer with a fixed transmission ratio, the input shaft 11 drives the sun wheel I5 to rotate, the output shaft 13 and the sun wheel IV 8 are in a stop state under the action of a load, the magnetorheological brake I9 does not work at the moment, and the planet carrier I3 is in a free rotation state; when the motor reaches the rated rotation speed, the first magneto-rheological brake 9 starts to work, the braking moment of the first planet carrier 3 is controlled to be gradually increased according to a set parameter curve, the rotation speed is gradually reduced, so that the rotation speed of the output shaft 13 is gradually increased, and the load is driven to start according to a set starting mode;
when starting is finished, the braking moment of the magneto-rheological brake I9 reaches the maximum value, the planet carrier I3 is completely braked, the output shaft 13 reaches the stable rotating speed, the device enters a stable working stage, and the no-load soft starting process of the motor is finished; at this time, the first planetary gear transmission system corresponds to a reducer with a fixed transmission ratio, and the braking torque of the magnetorheological brake II 10 can be adjusted according to the requirement, so that the rotation speed of the output shaft 13 can be changed, and the speed change is realized.
The invention has the characteristic of combining planetary gear transmission with a magneto-rheological brake, and adopts a series transmission mode of two sets of WW type planetary gears; the gear change adjustment can still be performed after the start-up is completed.
According to the invention, the sun wheel and the planet wheel are engaged for transmission in a matched manner, so that the speed change response speed is high, the control precision is high, the transmission is stable and efficient, and the bearing capacity is strong; the method has the characteristics of safety, reliability and simplicity in operation;
the invention controls the corresponding planet carrier through the independent magneto-rheological brake, can realize soft start and soft stop, has the overload protection function, has smaller required braking torque and is simple to control;
the invention adopts external gear transmission, and has low manufacturing cost.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (7)
1. A mechanical dual speed soft start transmission, characterized by: the transmission consists of two sets of WW type planetary gear transmission systems which are connected in series, and comprises an input shaft, a sun gear, a transmission mechanism, a transmission shaft, an output shaft, a planet carrier and a magneto-rheological brake for controlling the planet carrier;
the first magnetorheological brake control planet carrier and the second magnetorheological brake control planet carrier are connected through transmission shafts.
2. A mechanical dual speed soft start transmission as set forth in claim 1 wherein: the magneto-rheological brake adopts a multi-disc and/or coil built-in structure.
3. A mechanical dual speed soft start transmission as set forth in claim 1 wherein: the planet wheel is arranged on the planet carrier, and the sun wheel is meshed with the planet wheel for transmission.
4. A mechanical dual speed soft start transmission as set forth in claim 1 wherein: the transmission shaft is respectively connected with the second sun gear and the third sun gear, the first sun gear is connected with the second sun gear, and the third sun gear is connected with the fourth sun gear.
5. A mechanical dual speed soft start transmission as set forth in claim 1 wherein: the transmission mechanism is provided with two groups which are respectively arranged on the first planet carrier and the second planet carrier, and each group of transmission mechanism consists of a plurality of planet gears.
6. A mechanical dual speed soft start transmission as set forth in claim 4 wherein: the first sun gear and the second sun gear are respectively connected with the planetary gear set on the first planet carrier in a meshing way, and the third sun gear and the fourth sun gear are respectively connected with the planetary gear set on the second planet carrier in a meshing way.
7. A method of starting and shifting a mechanical dual-ratio soft start transmission according to any one of claims 1-6, wherein:
the steps are as follows
Step 1: starting a motor, wherein an input shaft drives a sun gear to rotate, the first magnetorheological brake does not work, the first planet carrier is in a free rotation state, the second magnetorheological brake completely brakes the second planet carrier, and a transmission system of a planetary gear set on the second planet carrier is equivalent to a speed reducer with a fixed transmission ratio;
step 2: the motor speed is increased to reach the rated speed, at the moment, the magnetorheological brake starts to work, the braking torque of the first planet carrier is controlled to be gradually increased according to a set parameter curve, and the speed is gradually reduced, so that the speed of the output shaft 13 is gradually increased, and the load is driven to start according to a set starting mode;
step 3: the first planetary gear transmission system corresponds to a speed reducer with a fixed transmission ratio, and at the moment, the no-load soft start process of the motor is finished;
step 4: and regulating the braking torque of the magneto-rheological brake II so as to change the rotating speed of the output shaft and realize speed change.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310405825.0A CN116398592A (en) | 2023-04-17 | 2023-04-17 | Mechanical double-speed-change soft start speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310405825.0A CN116398592A (en) | 2023-04-17 | 2023-04-17 | Mechanical double-speed-change soft start speed changer |
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| Publication Number | Publication Date |
|---|---|
| CN116398592A true CN116398592A (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310405825.0A Pending CN116398592A (en) | 2023-04-17 | 2023-04-17 | Mechanical double-speed-change soft start speed changer |
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| CN (1) | CN116398592A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB282662A (en) * | 1926-12-22 | 1928-03-15 | Pulsgetriebe Ges Mit Beschraen | Epicyclic change speed gear particularly for motor cars |
| GB436667A (en) * | 1934-04-23 | 1935-10-16 | William Wharton | Improvements in variable speed power transmission mechanism |
| WO1980001402A1 (en) * | 1978-12-28 | 1980-07-10 | Shishibori T | Stepless transmission for heavy loads |
| RU2050487C1 (en) * | 1992-01-27 | 1995-12-20 | Владимир Александрович Шебанов | Planetary reduction gear |
| CN202597631U (en) * | 2012-03-13 | 2012-12-12 | 南京理工大学 | Magneto-rheological hydraulic control planetary transmission device |
| CN103470713A (en) * | 2013-09-26 | 2013-12-25 | 中国矿业大学 | Magnetorheological fluid soft starting device |
| CN103770623A (en) * | 2014-02-20 | 2014-05-07 | 合肥工业大学 | Gasoline-electric and hydraulic compound hybrid power transmission system |
| CN108386497A (en) * | 2018-01-11 | 2018-08-10 | 福州六班动力机械工程有限公司 | A kind of adaptive transmission and the automobile with adaptive transmission |
| CN110043620A (en) * | 2018-01-15 | 2019-07-23 | 怀化沃普环保科技有限公司 | Planetary gear and the fixed Contiuum type planetary transmission of axis |
| CN112128324A (en) * | 2020-10-10 | 2020-12-25 | 吉林大学 | In-wheel two-gear automatic transmission and power-interruption-free gear shifting control method |
-
2023
- 2023-04-17 CN CN202310405825.0A patent/CN116398592A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB282662A (en) * | 1926-12-22 | 1928-03-15 | Pulsgetriebe Ges Mit Beschraen | Epicyclic change speed gear particularly for motor cars |
| GB436667A (en) * | 1934-04-23 | 1935-10-16 | William Wharton | Improvements in variable speed power transmission mechanism |
| WO1980001402A1 (en) * | 1978-12-28 | 1980-07-10 | Shishibori T | Stepless transmission for heavy loads |
| RU2050487C1 (en) * | 1992-01-27 | 1995-12-20 | Владимир Александрович Шебанов | Planetary reduction gear |
| CN202597631U (en) * | 2012-03-13 | 2012-12-12 | 南京理工大学 | Magneto-rheological hydraulic control planetary transmission device |
| CN103470713A (en) * | 2013-09-26 | 2013-12-25 | 中国矿业大学 | Magnetorheological fluid soft starting device |
| CN103770623A (en) * | 2014-02-20 | 2014-05-07 | 合肥工业大学 | Gasoline-electric and hydraulic compound hybrid power transmission system |
| CN108386497A (en) * | 2018-01-11 | 2018-08-10 | 福州六班动力机械工程有限公司 | A kind of adaptive transmission and the automobile with adaptive transmission |
| CN110043620A (en) * | 2018-01-15 | 2019-07-23 | 怀化沃普环保科技有限公司 | Planetary gear and the fixed Contiuum type planetary transmission of axis |
| CN112128324A (en) * | 2020-10-10 | 2020-12-25 | 吉林大学 | In-wheel two-gear automatic transmission and power-interruption-free gear shifting control method |
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