CN114962492A - Friction type soft starter with adjustable torque - Google Patents
Friction type soft starter with adjustable torque Download PDFInfo
- Publication number
- CN114962492A CN114962492A CN202210620270.7A CN202210620270A CN114962492A CN 114962492 A CN114962492 A CN 114962492A CN 202210620270 A CN202210620270 A CN 202210620270A CN 114962492 A CN114962492 A CN 114962492A
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- torsion
- torque
- ejector rod
- ring
- pin
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/22—Automatic clutches actuated entirely mechanically controlled by both speed and torque
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/30—Systems of a plurality of automatic clutches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
- H02K7/118—Structural association with clutches, brakes, gears, pulleys or mechanical starters with starting devices
Abstract
The invention discloses a friction type soft starter with adjustable torque, which comprises a driving end part, a driven end part and a torque limiting protector, wherein the driving end part is provided with a rotating flange which is driven to rotate by a rotor, the driven end part is provided with a pin ring which drives a driven end to rotate, the torque limiting protector is arranged between the rotating flange and the pin ring, and the torque limiting protector can realize that the torque between the rotating flange and the pin ring can be adjusted at any time, thereby achieving the technical effects of overload safety protection in a use site, no damage to a motor and a coupler, no long-time production stop, quick recovery in the site and quick and convenient operation.
Description
Technical Field
The invention relates to the technical field of couplings, in particular to a friction type soft starter with adjustable torque.
Background
A friction type soft starter belongs to the field of couplings and is used for connection between a motor and a speed reducer, in particular to a high-power motor, and is mainly suitable for mechanical equipment which is started with load, has large starting inertia of a working machine, is difficult to start, needs overload safety protection and is started more frequently without large-range speed regulation. Such as an induced draft fan, a pump, an oil field pumping unit, a belt conveyor, a scraper conveyor, a stacker-reclaimer, a ball mill, a crusher, a mineral powder sintering machine, an air compressor, a sand cleaning roller machine, a crane traveling mechanism, a steel mill pusher, a boiler grate transmission and the like. The general rotating speed is 600-3000 rpm (more than 3000rpm, the power range is 30-7100 kw, the working environment is-40 ℃ to +80 ℃, and the soft start power transmission device is widely applied to energy-saving soft start and power transmission of high-power motors in mechanical equipment such as metallurgy, mines, petroleum, chemical engineering, hoisting transportation, general machinery and the like.
The main problem that exists of present friction type soft starter: (1) the torque cannot be accurately controlled, and particularly cannot be used in special industries or occasions where equipment requires accurate torque control; (2) the moment is difficult to adjust, if the working condition on site needs to be adjusted temporarily, the whole coupler needs to be disassembled and the steel balls need to be refilled, the coupler needs to be installed and aligned again, the operation is complex and difficult, the requirement on the skill level of operators is high, and if the steel balls refilling each cavity are uneven and have over-poor dynamic balance, a motor shaft and a reducer shaft are easy to break, so that potential safety hazards are brought; (3) the effect of safety protection is hardly realized, once the load is greater than the factor of safety of the energy-conserving soft starter of friction formula, the steel ball will skid in main casing internal portion, and the initiative end is thrown off with the driven end, and the shaft coupling temperature rises fast in the twinkling of an eye, if operation workman discovers untimely, continues to rise, and the too high heat of temperature transmits and damages the motor on the motor shaft, and serious condition, whole shaft coupling all will not directly continue to use.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a friction type soft starter with adjustable torque, and solves the problem that the friction type soft starter in the prior art can adjust the torque only after the whole coupler is disassembled.
In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a torque modulated friction soft starter is provided comprising a driving end member, a driven end member and a torque limiting protector;
the driving end component comprises a main shell and a rotor for connecting the output end of the motor, the two ends of the main shell are respectively connected with a motor end cover and a pin end cover, and a centrifugal medium is filled in the main shell; the rotor is arranged in the main shell, the circumferential outer wall of the rotor is respectively and rotatably connected with the motor end cover and the pin end cover, and the rotor is provided with blades positioned in the main shell; a rotating flange is arranged on the outer side wall of the pin end cover;
the driven end part comprises a pin ring and a driven end, one side of the pin ring is rotatably connected with the rotating flange through a bearing, the other side of the pin ring is connected with the driven end, and the driven end is used for being connected with the end of the speed reducer;
the torsion limiting protector comprises a torsion adjusting part and a torsion fixing part, the torsion adjusting part is arranged on the circumferential outer wall of the rotating flange, the torsion fixing part is arranged on the circumferential outer wall of the pin ring, the torsion adjusting part comprises a retaining sleeve, and a first ejector rod capable of moving axially is arranged in the retaining sleeve; the torsion fixing part comprises a second ejector rod with a groove at the top end; a first steel ball for transferring torsion is arranged between the first ejector rod and the second ejector rod; one part of the first steel ball is positioned in the retaining sleeve and is contacted with the end part of the first ejector rod, and the other part of the first steel ball is contacted with the groove on the second ejector rod.
The basic principle of the invention is as follows: the motor drives the rotor to rotate, the rotor drives centrifugal medium to centrifugally move through the blades, centrifugal pressure is generated when the centrifugal medium reaches the inner wall of the main shell, centrifugal force is gradually converted into the maximum static friction moment with the inner wall of the shell, the faster the rotating speed of the motor is, the larger the generated friction force is, the larger the friction force can be until the load can be driven to rotate together, and once the load is driven to rotate, the inside of the whole coupler is relatively static, so that power transmission is completed, and the function of soft start is realized. The torsion limiting protector comprises a torsion limiting shell, a torsion adjusting cover and a disc spring, wherein the torsion adjusting cover and the disc spring are arranged in the torsion limiting shell; when the load exceeds the torque set by the torque limiting protector, the rotating flange and the pin ring rotate relatively, the large steel ball pushes the first ejector rod to move backwards under the action of the groove, the large steel ball is separated from the groove on the second ejector rod, the torque transmission is blocked, the motor normally runs, the load end is static, and the safety protection of the motor under the overload condition is realized. The torque is adjusted on site, only the torque adjusting part is required to be disassembled from the rotary flange, the position of the first ejector rod in the retaining sleeve is adjusted through a tool, the whole soft starter is not required to be disassembled, the loading and unloading are convenient, the maintenance cost is low, and the working efficiency is improved.
Furthermore, in order to enable the connection between the pin ring and the rotating flange to be tighter and improve the rotating stability of the pin ring, a cylindrical step is convexly arranged on one side of the pin ring close to the rotating flange; the middle part of the rotating flange is provided with a multi-step cylindrical hole concentric with the excircle of the rotating flange, the cylindrical step on the pin ring is positioned in the cylindrical hole of the rotating flange, and a bearing is arranged between the cylindrical step and the cylindrical hole.
Further, in order to increase the installation stability of the bearing and prevent the bearing from separating, a bearing baffle is arranged on the outer side surface of the cylindrical step on the rotating flange.
Furthermore, a plurality of nylon pins in a cylindrical structure are arranged on the pin ring, and are uniformly distributed on the circumferential inner wall of the pin ring and the excircle of the driven end by taking the axis of the rotor as the center; the circumferential outer wall at one end of the driven end is contacted with the circumferential inner walls of the nylon pins; a plurality of nylon pins pass through the pin gland and can dismantle with the driven end and be connected. The arrangement of the nylon pin can compensate axial deviation, angle deviation and radial deviation between the driven end and the rotor, and the requirements on vibration reduction, noise reduction, impact resistance and installation accuracy are low.
Furthermore, the torsion adjusting part and the torsion fixing part both comprise quenching steel sleeves, and the retaining sleeve and the second ejector rod are respectively arranged inside the quenching steel sleeves on the torsion adjusting part and the torsion fixing part; and stepped holes matched with the quenching steel sleeves on the torsion adjusting part and the torsion fixing part are formed in the outer side wall of the rotating flange and the outer side wall of the pin ring.
Further, be provided with a plurality of blades on the circumference outer wall of rotor, a plurality of blades use the rotor axis to evenly arrange as the center pin hoop, and a plurality of cavities are cut apart into with main casing body inside to a plurality of blades, all are provided with equivalent centrifugal medium in every cavity. Every cavity is provided with the centrifugal medium of quality and quantity such as, and the centrifugal medium can be medium such as shot, steel ball, and a plurality of cavities make centrifugal medium even at main casing inside packing, and dynamic balance is good for soft starter starts steadily smoothly its factor of safety height.
Further, in order to transmit the torsion between the driving end part and the driven end part, the number of the torsion limiting protectors is multiple, and the torsion limiting protectors are uniformly arranged on the circumferential outer side wall of the rotating flange and the pin ring by taking the rotor axis as a central axis.
Furthermore, the torsion adjusting part also comprises a torsion limiting shell fixedly connected with the outer wall of the rotary flange cylinder, a torsion adjusting cover is connected with the torsion limiting shell through an internal thread, a threaded hole is formed in the outer circle of the torsion limiting shell and is locked with the torsion adjusting cover through a screw, and a bottom conical ring is arranged on the inner bottom surface of the torsion limiting shell;
one side of the retaining sleeve is connected with the torsion force adjusting cover, and two ends of the first ejector rod are respectively positioned in the torsion force limiting shell and the retaining sleeve;
a sliding ring and a disc spring are sleeved on a rod section of the first ejector rod, which is positioned in the torsion limiting shell; two ends of the disc spring are respectively contacted with the end surface of one side of the slip ring and the inner end surface of the torsion adjusting cover;
one end face of the bottom conical ring is fixedly connected with the inner end face of the bottom of the torsion limiting shell, a second steel ball is arranged among the other end face of the bottom conical ring, the other end face of the slip ring and the circumferential outer wall of the first ejector rod, and the bottom conical ring, the slip ring and the contact surface of the first ejector rod and the second steel ball are all in an arc curved surface structure;
the torsion fixing component also comprises a rear supporting plate fixedly connected with the outer wall of the periphery of the pin ring, a quenching steel sleeve is arranged on the end face of the rear supporting plate, and the second ejector rod is arranged inside the quenching steel sleeve;
the excircle of the first steel ball is respectively contacted with the end surface of the first ejector rod and the groove of the second ejector rod.
Furthermore, a thread limiting rod is arranged on the rear supporting plate, threads of the thread limiting rod penetrate through the rear supporting plate to be fixedly connected with the end part of the second ejector rod, a locking nut is arranged on the thread limiting rod, and one end face of the locking nut is in contact with the rear supporting plate. The position of the second ejector rod in the quenching steel sleeve is adjusted by the threaded limiting rod, the position of the groove in the axial direction on the second ejector rod is changed, and when the load exceeds the torque set by the torque limiting protector, the large steel ball is separated from the groove, so that the large steel ball is completely positioned in the retaining sleeve, the rotary flange is completely separated from the pin ring, and the transmission of the torque force from the driving end part to the driven end part is blocked.
Furthermore, the friction type soft starter also comprises a recovery check ring sleeved outside the main shell; one end of each first ejector rod is positioned outside the torsion limiting shell; the end face of the recovery retainer ring is fixedly connected with the end part of each first ejector rod through a screw. When the soft starter needs to be recovered in a shutdown state, the rubber hammer is only slightly knocked to recover the retainer ring, the recovery retainer ring pushes the first steel ball through the first ejector rod, one part of the first steel ball is located in the retaining sleeve and is in contact with the end part of the first ejector rod, the other part of the first steel ball is in contact with the groove in the second ejector rod, the transmission of torque is achieved, and the whole soft starter can normally work.
The invention has the beneficial effects that: 1. the friction type soft starter with adjustable torque converts heavy load starting of a motor into no-load starting, realizes a mechanical soft starting function, reduces starting current and starting energy consumption by about 65%, has no difference in rotating speed and no friction loss at a driving end and a driven end in normal operation except the starting and braking stages, and has transmission efficiency of more than 99%.
2. The friction type soft starter with adjustable torque can fundamentally solve the unreasonable situation of the large horse-drawn trolley with load starting, can reduce the motor capacity, improve the power factor of a power grid and the motor efficiency, reduce the reactive loss, save the electric energy, simplify the starting equipment of the motor and reduce the equipment cost.
3. When the working machine is overloaded or jammed, the torque limiting protector is automatically disengaged, the motor end normally runs, the load end is static, and the running of the coupler can be quickly recovered after the overload and jamming conditions of the working machine are relieved.
4. The torque transmitted by the friction type soft starter with adjustable torque can be adjusted, and overload safety protection is easy to realize. Generally, the torque of the protector can be limited by adjusting the torque, the optimal overload protection torque is preset, and the torque can be adjusted in real time on site according to the use condition on site without disassembling the machine.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a friction type soft starter with adjustable torque.
Fig. 2 is a schematic sectional view of the torque limiting protector.
Wherein, 1, a main shell; 2. a rotor; 3. a motor end cover; 4. a pin end cap; 5. centrifuging the medium; 6. a blade; 7. rotating the flange; 8. a pin ring; 9. a driven end; 10. a retaining sleeve; 11. a first ejector rod; 12. a second ejector rod; 13. a first steel ball; 14. a bearing; 15. a bearing baffle; 16. a nylon pin; 17. a pin gland; 18. a torque limiting housing; 19. a torque force adjusting cover; 20. a slip ring; 21. a disc spring; 22. a bottom cone ring; 23. a rear supporting plate; 24. quenching the steel sleeve; 25. a threaded stop bar; 26. restoring the retainer ring; 27. and a second steel ball.
Detailed Description
The following description of the embodiments of the present invention is provided to facilitate the understanding of the present invention by those skilled in the art, but it should be understood that the present invention is not limited to the scope of the embodiments, and it will be apparent to those skilled in the art that various changes may be made without departing from the spirit and scope of the invention as defined and defined in the appended claims, and all matters produced by the invention using the inventive concept are protected.
As shown in fig. 1-2, the present invention provides a torque adjustable friction soft starter comprising a driving end member, a driven end member and a torque limiting protector.
The number of the torsion limiting protectors is multiple, and the torsion limiting protectors are evenly arranged on the outer walls of the circumferences of the rotating flange 7 and the pin ring 8 in an annular mode by taking the axis of the rotor 2 as a central axis, so that torsion transmission between the driving end part and the driven end part is smoother and more stable.
The driving end component comprises a main shell 1 and a rotor 2 for connecting the output end of a motor, two ends of the main shell 1 are respectively connected with a motor end cover 3 and a pin end cover 4, and a centrifugal medium 5 is filled in the main shell 1; the rotor 2 is arranged in the main shell 1, the circumferential outer wall of the rotor 2 is respectively and rotatably connected with the motor end cover 3 and the pin end cover 4, and the rotor 2 is provided with blades 6 positioned in the main shell 1; the outer side wall of the pin end cover 4 is provided with a rotating flange 7.
The driven end part comprises a pin ring 8 and a driven end 9, one side of the pin ring 8 is rotatably connected with the rotating flange 7 through a bearing 14, the other side of the pin ring 8 is connected with the driven end 9, and the driven end 9 is used for being connected with the end of the speed reducer.
A cylindrical step is convexly arranged on one side of the pin ring 8 close to the rotating flange 7; the middle part of the rotating flange 7 is provided with a cylindrical hole with multiple steps concentric with the outer circle, the cylindrical step on the pin ring 8 is positioned in the cylindrical hole of the rotating flange 7, and a bearing 14 is arranged between the cylindrical step and the cylindrical hole, so that the pin ring 8 is more tightly connected with the rotating flange 7, and the stability of the rotation of the pin ring 8 is improved.
In order to increase the mounting stability of the bearing 14 and prevent the bearing 14 from being detached, a bearing baffle 15 is provided on the outer side surface of the cylindrical step on the rotating flange 7. The torque limiting protector comprises a torque adjusting part and a torque fixing part, wherein the torque adjusting part is arranged on the circumferential outer wall of the rotating flange 7, and the torque fixing part is arranged on the circumferential outer wall of the pin ring 8. The torsion adjusting part comprises a retaining sleeve 10, and a first ejector rod 11 capable of axially moving is arranged in the retaining sleeve 10; the torsion fixing part comprises a second ejector rod 12 with a groove at the top end; a first steel ball 13 for transmitting torsion is arranged between the first ejector rod 11 and the second ejector rod 12; one part of the first steel ball 13 is positioned in the retaining sleeve 10 and is contacted with the end part of the first ejector rod 11, and the other part of the first steel ball 13 is contacted with the groove on the second ejector rod 12. The torsion adjusting part and the torsion fixing part both comprise quenching steel sleeves 24, and the retaining sleeve 10 and the second ejector rod 12 are respectively arranged inside the quenching steel sleeves 24 on the torsion adjusting part and the torsion fixing part; the outer side wall of the rotary flange 7 and the outer side wall of the pin ring 8 are both provided with stepped holes matched with the quenching steel sleeves 24 on the torsion adjusting part and the torsion fixing part.
The basic principle of the invention is as follows: the motor drives rotor 2 rotatory, rotor 2 drives 5 centrifugal motion of centrifugal medium through blade 6, and centrifugal medium 5 produces centrifugal pressure on reaching main casing body 1's the inner wall, and centrifugal force turns into gradually with shells inner wall's the biggest static friction moment, and the rotational speed of motor is faster, and the frictional force of production is big more, rotates together until can driving the load, in case drive the load and rotate, the inside relative stillness of whole shaft coupling to accomplish power transmission, realize the function of soft start. The torsion limiting protector can realize the adjustment of torsion transmission by adjusting the position of the first ejector rod 11; when the load exceeds the torque set by the torque limiting protector, the rotating flange 7 and the pin ring 8 rotate relatively, the large steel ball pushes the first ejector rod 11 to move backwards under the action of the groove, the large steel ball is separated from the groove on the second ejector rod 12, the torque transmission is blocked, the motor normally runs, the load end is static, and the safety protection of the motor under the overload condition is realized. When the torque needs to be adjusted on site, only the torque adjusting part needs to be detached from the upper surface of the rotating flange 7, the torque limiting protector comprises a torque limiting shell 18, a torque adjusting cover 19 and a disc spring 21 which are arranged in the torque limiting shell 18, the torque limiting protector can compress the disc spring 21 by adjusting the torque adjusting cover 19, the whole soft starter does not need to be detached, the mounting and dismounting are convenient, the maintenance cost is low, and the working efficiency is improved.
A plurality of nylon pins 16 in a cylindrical structure are arranged on the pin ring 8, and the nylon pins 16 are circumferentially and uniformly distributed on the circumferential inner wall of the pin ring 8 and the excircle of the driven end 9 by taking the axis of the rotor 2 as a center;
the circumferential outer wall of one end of the driven end 9 is contacted with the circumferential inner walls of a plurality of nylon pins 16; a plurality of nylon pins 16 are removably connected to the driven end by pin glands 17. The arrangement of a plurality of nylon pins 16 can compensate axial deviation, angle deviation and radial deviation between the driven end 9 and the rotor 2, and the requirements on vibration reduction, noise reduction, impact resistance and installation accuracy are low.
Be provided with a plurality of blades 6 on rotor 2's the circumference outer wall, a plurality of blades 6 use rotor 2 axis to evenly arrange as the center pin hoop, and a plurality of cavities are cut apart into with main casing 1 is inside to a plurality of blades 6, all are provided with equivalent centrifugal medium 5 in every cavity. Every cavity is provided with the centrifugal medium 5 of quality and quantity such as, and centrifugal medium 5 can be medium such as shot, steel ball, and a plurality of cavities make centrifugal medium 5 even at main casing body 1 inside packing, and dynamic balance is good for soft starter starts steadily smoothly its factor of safety height.
The force adjusting part further comprises a torsion limiting shell 18 fixedly connected with the outer wall of the cylinder of the rotating flange 7, a torsion adjusting cover 19 is connected with the inner thread of the torsion limiting shell 18, a threaded hole is formed in the outer circle of the torsion limiting shell 18 and is locked with the torsion adjusting cover 19 through a screw, and a bottom conical ring 22 is arranged on the inner bottom surface of the torsion limiting shell 18. One side of the holding sleeve 10 is connected with a torsion force adjusting cover 19, and both ends of the first plunger 11 are respectively located inside the torsion force limiting housing 18 and the holding sleeve 10. The rod section of the first ejector rod 11, which is positioned inside the torsion limiting shell 18, is sleeved with a slip press ring 20 and a disc spring 21; both ends of the disc spring 21 are respectively in contact with one side end surface of the slide ring 20 and the inner end surface of the torsion adjusting cover 19.
One end face of the bottom conical ring 22 is fixedly connected with the inner end face of the bottom of the torsion limiting shell 18, a second steel ball 27 is arranged among the other end face of the bottom conical ring 22, the other end face of the sliding pressing ring 20 and the circumferential outer wall of the first ejector rod 11, and the contact surfaces of the bottom conical ring 22, the sliding pressing ring 20, the first ejector rod 11 and the second steel ball 27 are all arc curved surface structures.
The torsion fixing part also comprises a rear supporting plate 23 fixedly connected with the outer wall of the circumference of the pin ring 8, a quenching steel sleeve 24 is arranged on the end face of the rear supporting plate, and the second ejector rod 12 is arranged inside the quenching steel sleeve 24. The outer wall of the first steel ball 13 is respectively contacted with the end surface of the first push rod 11 and the groove of the second push rod 12.
The friction type soft starter also comprises a recovery check ring 26 sleeved outside the main shell 1; one end of each first ejector rod 11 is positioned outside the torsion limiting shell 18; the end face of the restoring baffle ring 26 is fixedly connected with the end part of each first ejector rod 11 through a screw.
The working principle of the torque limiting protector for realizing the torque limiting protection function is as follows: a torque adjusting cover 19 of a torque adjusting part is adjusted according to the use torque of a client, the torque adjusting cover is installed on a rotating flange 7 after being adjusted, a torque limiting protector is matched with a groove on a second ejector rod 12 through a first steel ball 13 to generate transmission torque, once the load exceeds the set torque, the rotating flange 7 and a pin ring 8 generate relative rotation, the first steel ball 13 slides out of the groove and pushes the first ejector rod 11 to move backwards, the first ejector rod 11 pushes a second steel ball 27, the second steel ball 27 moves backwards and upwards under the reaction force of the conical surface of a bottom conical ring 22 and pushes a sliding ring 20 to move towards an opening of a retaining sleeve 10, the moving sliding ring 20 compresses and compresses a disc spring 21, when the disc spring 21 is compressed to a certain degree, the second steel ball 27 is positioned on the largest outer circle of the first ejector rod 11, meanwhile, the first steel ball 13 is completely positioned inside the retaining sleeve 10, and the first steel ball 13 is separated from the groove, the rotary flange 7 and the stud ring 8 are completely separated, the stud ring 8 of the rotary flange 7 rotates relatively, the function of motor safety protection is achieved, when the motor needs to be recovered in a shutdown state, the check ring 26 only needs to be recovered by slight knocking of the rubber hammer, and the motor can work normally. The rear supporting plate 23 is provided with a threaded limiting rod 25, the threaded limiting rod 25 penetrates through the rear supporting plate 23 and is fixedly connected with the end part of the second ejector rod 12, the threaded limiting rod 25 is provided with a locking nut, and one end face of the locking nut is in contact with the rear supporting plate 23. The position of the second ejector rod 12 in the quenching steel sleeve 24 is adjusted by the threaded limiting rod 25, the position of the groove in the axial direction on the second ejector rod 12 is changed, and when the load exceeds the torque set by the torque limiting protector, the large steel ball is separated from the groove, so that the large steel ball is completely positioned in the retaining sleeve 10, the rotary flange 7 is completely separated from the pin ring 8, and the transmission of the torque from the driving end part to the driven end part is blocked.
The basic principle of the torque limiting protector for realizing torque regulation is as follows: if the torque needs to be adjusted on site, only the torque adjusting part needs to be detached from the upper surface of the rotating flange 7, the torque wrench selects a corresponding torque value, the torque of the torque adjusting cover 19 is adjusted on site, and the torque adjusting cover 19 is adjusted to compress the disc spring 21, so that a larger pre-pressure is generated between the first steel ball 13 and the groove of the second ejector rod 12, and the function of adjusting the torque is realized.
In conclusion, the friction type soft starter with the adjustable torque provided by the invention can realize that the torque can be adjusted at any time, and can realize soft start at the same time, thereby achieving the technical effects of using field overload safety protection, not damaging a motor and a coupler, not needing long-time production stop, quickly recovering the field and quickly and conveniently operating.
Claims (10)
1. A friction type soft starter with adjustable torque is characterized by comprising a driving end part, a driven end part and a torque limiting protector;
the driving end part comprises a main shell and a rotor for connecting the output end of the motor, the two ends of the main shell are respectively connected with a motor end cover and a pin end cover, and a centrifugal medium is filled in the main shell; the rotor is arranged in the main shell, the circumferential outer wall of the rotor is respectively and rotatably connected with the motor end cover and the pin end cover, and blades positioned in the main shell are arranged on the rotor; a rotating flange is arranged on the outer side wall of the pin end cover;
the driven end part comprises a pin ring and a driven end, one side of the pin ring is rotatably connected with the rotating flange through a bearing, the other side of the pin ring is connected with the driven end, and the driven end is used for being connected with the end of the speed reducer;
the torsion limiting protector comprises a torsion adjusting part and a torsion fixing part, wherein the torsion adjusting part is arranged on the circumferential outer wall of the rotating flange, the torsion fixing part is arranged on the circumferential outer wall of the pin ring, the torsion adjusting part comprises a retaining sleeve, and a first ejector rod capable of axially moving is arranged in the retaining sleeve; the torsion fixing part comprises a second ejector rod with a groove at the top end; a first steel ball for transmitting torsion is arranged between the first ejector rod and the second ejector rod; one part of the first steel ball is positioned in the retaining sleeve and is contacted with the end part of the first ejector rod, and the other part of the first steel ball is contacted with the groove on the second ejector rod.
2. The friction type soft starter with adjustable torque as claimed in claim 1, wherein a side of the pin ring close to the rotating flange is convexly provided with a cylindrical step; the middle part of the rotating flange is provided with a multi-step cylindrical hole concentric with the excircle of the rotating flange, the cylindrical step on the pin ring is positioned in the cylindrical hole of the rotating flange, and a bearing is arranged between the cylindrical step and the cylindrical hole.
3. The torque adjustable friction soft starter of claim 2 wherein a bearing stop is provided on the outer side of the cylindrical step on the rotating flange.
4. The friction type soft starter with adjustable torque as claimed in claim 1, wherein a plurality of nylon pins with cylindrical structure are arranged on the pin ring, and are uniformly distributed on the inner circumferential wall of the pin ring and the outer circle of the driven end by taking the axis of the rotor as the center;
the circumferential outer wall at one end of the driven end is contacted with the circumferential inner walls of the nylon pins; a plurality of nylon pins pass through the pin gland and can dismantle with the driven end and be connected.
5. The friction type soft starter with adjustable torque as claimed in claim 1, wherein the torsion adjusting part and the torsion fixing part both comprise quenching steel sleeves, and the retaining sleeve and the second push rod are respectively arranged inside the quenching steel sleeves on the torsion adjusting part and the torsion fixing part; and stepped holes matched with the quenching steel sleeves on the torsion adjusting part and the torsion fixing part are formed in the outer side wall of the rotating flange and the outer side wall of the pin ring.
6. The torque-adjustable friction-type soft starter according to claim 1, wherein a plurality of blades are arranged on the circumferential outer wall of the rotor, the plurality of blades are circumferentially and uniformly arranged with the rotor axis as a central axis, the plurality of blades divide the interior of the main housing into a plurality of cavities, and an equal amount of centrifugal medium is arranged in each cavity.
7. The torque adjustable friction soft starter according to claim 1, wherein the number of the torsion limiting protectors is plural, and the plural torsion limiting protectors are uniformly arranged around the rotor axis as a central axis and on the circumferential outer side wall of the rotating flange and the stud ring.
8. The friction type soft starter with adjustable torque as claimed in claim 5, wherein the torque adjusting part further comprises a torque limiting shell fixedly connected with the outer wall of the rotating flange cylinder, a torque adjusting cover is connected with the torque limiting shell through an internal thread, a threaded hole is formed in the outer circle of the torque limiting shell and locks the torque adjusting cover through a screw, and a bottom conical ring is arranged on the inner bottom surface of the torque limiting shell;
one side of the retaining sleeve is connected with the torsion force adjusting cover, and two ends of the first ejector rod are respectively positioned in the torsion force limiting shell and the retaining sleeve;
a sliding ring and a disc spring are sleeved on a rod section of the first ejector rod, which is positioned in the torsion limiting shell; two ends of the disc spring are respectively contacted with the end surface of one side of the slip ring and the inner end surface of the torsion adjusting cover;
one end face of the bottom conical ring is fixedly connected with the inner end face of the bottom of the torsion limiting shell, a second steel ball is arranged among the other end face of the bottom conical ring, the other end face of the slip ring and the circumferential outer wall of the first ejector rod, and the contact surfaces of the bottom conical ring, the slip ring and the first ejector rod and the second steel ball are all arc curved surface structures;
the torsion fixing component also comprises a rear supporting plate fixedly connected with the peripheral outer wall of the pin ring, the end face of the rear supporting plate is provided with the quenching steel sleeve, and the second ejector rod is arranged inside the quenching steel sleeve;
the excircle of the first steel ball is respectively contacted with the end face of the first ejector rod and the groove of the second ejector rod.
9. The friction type soft starter with adjustable torque as claimed in claim 8, wherein the rear support plate is provided with a threaded limiting rod, the threaded limiting rod is threaded through the rear support plate and fixedly connected with the end of the second top rod, the threaded limiting rod is provided with a lock nut, and one end surface of the lock nut is in contact with the rear support plate.
10. The adjustable torque friction soft starter of claim 7 further comprising a recovery collar disposed about the exterior of the main housing; one end of each first ejector rod is positioned outside the torsion limiting shell; the end face of the recovery retainer ring is fixedly connected with the end part of each first ejector rod through a screw.
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| CN202210620270.7A CN114962492A (en) | 2022-06-02 | 2022-06-02 | Friction type soft starter with adjustable torque |
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| CN202210620270.7A CN114962492A (en) | 2022-06-02 | 2022-06-02 | Friction type soft starter with adjustable torque |
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