CN113417854A - Belt transmission device for screw compressor - Google Patents
Belt transmission device for screw compressor Download PDFInfo
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- CN113417854A CN113417854A CN202110915102.6A CN202110915102A CN113417854A CN 113417854 A CN113417854 A CN 113417854A CN 202110915102 A CN202110915102 A CN 202110915102A CN 113417854 A CN113417854 A CN 113417854A
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- 230000008859 change Effects 0.000 abstract description 17
- 230000033001 locomotion Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000013016 damping Methods 0.000 description 6
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
- F04C29/0042—Driving elements, brakes, couplings, transmissions specially adapted for pumps
- F04C29/005—Means for transmitting movement from the prime mover to driven parts of the pump, e.g. clutches, couplings, transmissions
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/02—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
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Abstract
The application discloses belt drive for screw compressor, which comprises a base, a machine support, install in the motor of frame and receive motor drive's screw machine, the drive pulley of motor passes through drive belt with the driven pulley of screw machine and links to each other, still include belt tensioning device, belt tensioning device includes the control unit who is connected with the drive belt electricity, the execution unit that is controlled by the control unit, and contact with drive belt and receive the regulating wheel of execution unit driven, control unit produces the signal of telecommunication according to drive belt's tensile force size, execution unit does the removal or rotates and drives the regulating wheel change position according to the signal of telecommunication, with the tensioning degree that changes drive belt and make driven pulley's cornerite alpha satisfy: alpha is more than or equal to 190 degrees and less than or equal to 210 degrees. The tension degree of the transmission belt can be self-adaptively adjusted through the belt tensioning device with a reliable structure, the requirement on the strength of the belt tensioning device is reduced, and the durability of the belt tensioning device and the durability of the transmission belt are enhanced.
Description
Technical Field
The invention belongs to the technical field of screw compressors, and particularly relates to a belt transmission device for a screw compressor.
Background
The belt transmission device for the existing screw compressor is used for connecting a transmission motor and the screw compressor, the length of a belt is required to meet the center distance between a driving wheel and a driven wheel on the motor and the screw compressor, when the model of the motor or the screw compressor is changed, the center distance between the motor and the screw compressor can be changed along with the belt, the belt for transmission between the motor and the screw compressor cannot adapt to the changed center distance, and the belt can be loosened or too tight, so that the motor and the screw compressor cannot transmit.
Some screw compressors can adapt to the length of the belt and the center distance by adjusting the assembling position of the motor or the screw machine or the assembling structure of the motor and the screw machine, but the assembling parts of the motor or the screw machine need to be disassembled one by one and then installed on other hole positions by human participation, the adjusting steps are complicated, the assembling stability of the motor and the screw machine is influenced, and the transmission precision is low.
Disclosure of Invention
The invention provides a belt transmission device for a screw compressor, so that the tensioning degree of a transmission belt can be self-adaptively adjusted through a belt tensioning device with a reliable structure.
The technical scheme adopted by the invention is as follows:
a belt transmission device for a screw compressor comprises a base, a frame, a motor arranged on the frame and a screw machine driven by the motor, a motor shaft of the motor is fixedly provided with a driving belt pulley, an input shaft of the screw machine is fixedly provided with a driven belt pulley, the driving belt pulley is connected with the driven belt pulley through a transmission belt, and the belt tensioning device is also included, the belt tensioning device comprises a control unit electrically connected with the transmission belt, an execution unit controlled by the control unit, and an adjusting wheel contacted with the transmission belt and driven by the execution unit, the control unit generates an electric signal according to the tension of the transmission belt, and the execution unit moves or rotates according to the electric signal and drives the adjusting wheel to change the position so as to change the tension degree of the transmission belt and enable the wrap angle alpha of the driven pulley to meet the following requirements: alpha is more than or equal to 190 degrees and less than or equal to 210 degrees.
The belt transmission device for the screw compressor also has the following additional technical characteristics:
the adjusting wheel is provided with a relaxation position and a pre-tightening position, the relaxation position enables the tension force of the transmission belt to be reduced, the pre-tightening position enables the tension force of the transmission belt to be enhanced, the control unit can generate different electric signals, and the execution unit drives the adjusting wheel to reciprocate between the relaxation position and the pre-tightening position according to the different electric signals.
The execution unit comprises an air cylinder capable of receiving the electric signal and a rotating rod hinged to the base, one end of the rotating rod is fixedly connected with the adjusting wheel, the rotating rod abuts against a push rod of the air cylinder and is pushed by the push rod to drive the adjusting wheel to rotate back and forth between the loosening position and the pre-tightening position.
The circumferential surface of the adjusting wheel is inwards sunken to form an anti-falling groove for the transmission belt to be embedded in.
The frame is convexly provided with a first limiting part and a second limiting part, the first limiting part is arranged at the limit rotating position on one side of the rotating rod to correspond to the limit position of the loosening position of the adjusting wheel, and the second limiting part is arranged at the limit rotating position on the other side of the rotating rod to correspond to the limit position of the pre-tightening position of the adjusting wheel.
The execution unit comprises an air cylinder capable of receiving the electric signal and a connecting rod fixedly connected with a push rod of the air cylinder, one end of the connecting rod is fixedly connected with the adjusting wheel, and when the push rod moves, the connecting rod drives the adjusting wheel to reciprocate between the loosening position and the pre-tightening position.
The initial position of the adjusting wheel is located on one side of the inner ring of the transmission belt in a natural state, and the adjusting wheel can move to the pre-tightening position along the direction departing from the outer ring of the transmission belt under the driving of the connecting rod.
The initial position of the adjusting wheel is located on one side of the outer ring of the transmission belt in a natural state, and the adjusting wheel can move to the pre-tightening position along the direction departing from the inner ring of the transmission belt under the driving of the connecting rod.
The frame is provided with a guide part which is oppositely arranged at two sides of the moving direction of the adjusting wheel so as to form a moving track of the adjusting wheel.
The frame is including the installation the motor support of motor and installation the screw rod machine support of screw rod machine, the motor support with the connection can be dismantled to the screw rod machine support, just the motor support with be equipped with the shock attenuation piece between the screw rod machine support.
Due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. according to the invention, the belt tensioning device is adopted to adjust the tensioning degree of the transmission belt, the control unit can generate corresponding electric signals for loosening or pre-tensioning the belt according to the tensioning force of the transmission belt, the position of the adjusting wheel is changed through the execution unit capable of receiving the electric signals, and the contact state of the adjusting wheel and the transmission belt is adjusted, so that the tensioning degree of the transmission belt is adapted to the changed center distance, and in the whole adjusting process, the assembling position, the assembling structure and the connection relation of the motor and the screw machine do not need to be changed, and the transmission belt does not need to be replaced, so that the tensioning adjustment of the transmission belt is automatic and convenient; the wrap angle of the driven belt pulley is limited within the range, so that the friction force generated on the contact surface of the transmission belt and the belt pulley is stably greater than the component force of the transmission belt in the direction opposite to the movement direction of the transmission belt, the phenomenon of slipping of the transmission belt is avoided, in addition, the tension force which needs to be applied to the surface of the transmission belt by the belt tensioning device is reasonable in size within the range, the strength range which can be born by the belt tensioning device is not exceeded, the requirement on the strength of the belt tensioning device is reduced, the durability of the belt tensioning device is enhanced, the stress of the transmission belt at the contact stress part of the tensioning device is not too large, and the occurrence of the fracture condition of the transmission belt is avoided.
2. In a preferred embodiment of the present invention, the adjustment wheel has a slack position where the tension of the transmission belt is reduced and a pre-tension position where the tension of the transmission belt is increased, the control unit is capable of generating different electric signals, and the execution unit drives the adjustment wheel to reciprocate between the slack position and the pre-tension position according to the different electric signals. The control unit can generate one of two electric signals for the execution unit to generate different motion states according to the judgment on the tension of the transmission belt, wherein one electric signal enables the execution unit to drive the adjusting wheel to move towards a loosening position so as to reduce the tension borne by the transmission belt, and the other signal enables the execution unit to drive the adjusting wheel to move towards a pre-tightening position so as to enhance the tension borne by the transmission belt, so that the self-adaptive adjustment of the tension degree of the transmission belt on the change of the center distance is realized, and the flexibility and the accuracy of adjustment are improved.
3. As a preferred embodiment of the present invention, the execution unit includes an air cylinder capable of receiving the electrical signal, and a rotating rod hinged to the base, one end of the rotating rod is fixedly connected to the adjustment wheel, and the rotating rod abuts against a push rod of the air cylinder and is pushed by the push rod to drive the adjustment wheel to rotate back and forth between the relaxed position and the pre-tightening position. The rotating rod is driven to rotate to change the position of the adjusting wheel through the rotation of the push rod of the air cylinder, the adjusting wheel slides and shifts along the parallel direction of the surface of the transmission belt, so that the component force of the tension of the rotating rod on the transmission belt along the tangential direction of the transmission belt is reduced, the load borne by the transmission belt is reduced, and the service life of the transmission belt is prolonged.
Further, the circumferential surface of the adjusting wheel is inwards recessed to form a drop-proof groove for the transmission belt to be embedded in. The motion of driving belt may receive the influence of motor vibrations and take place to rock, or driving belt's rotational speed can cause the slippage problem at the excessive speed, sets up the anticreep groove that can make driving belt embedding at regulating wheel week surface, has restricted driving belt's rocking, prevents driving belt's slippage phenomenon.
4. In a preferred embodiment of the present invention, the frame is protrusively provided with a first stopper portion and a second stopper portion, the first stopper portion is disposed at a limit rotational position on one side of the rotating lever so as to correspond to a limit rotational position of a slack position of the adjustment wheel, and the second stopper portion is disposed at a limit rotational position on the other side of the rotating lever so as to correspond to a limit rotational position of a pre-tightening position of the adjustment wheel. Limiting the limit positions of the rotating rod and the adjusting wheel, preventing the adjusting wheel from transitionally interfering the tensioning degree of the transmission belt, and avoiding the problems of belt clamping or sliding of the transmission belt and the like.
5. As a preferred embodiment of the present invention, the execution unit includes an air cylinder capable of receiving the electrical signal, and a connecting rod fixedly connected to a push rod of the air cylinder, one end of the connecting rod is fixedly connected to the adjustment wheel, and when the push rod moves, the connecting rod drives the adjustment wheel to reciprocate between the slack position and the pre-tightening position. The push rod of cylinder drives the connecting rod translation in order to change the position of regulating wheel, and the regulating wheel is fixed and simple along transmission belt surface tangential and transmission belt looks butt and translation, the movement track of translation, has strengthened the reliability of adjusting, and the translation direction of regulating wheel makes the regulation stroke shorten greatly, has strengthened regulation efficiency.
Furthermore, the initial position of the adjusting wheel is located on one side of the inner ring of the transmission belt in a natural state, and the adjusting wheel can move to the pre-tightening position along a direction departing from the outer ring of the transmission belt under the driving of the connecting rod. The adjusting wheel is arranged on one side of the inner ring of the transmission belt and can be regulated to move to a pre-tightening position in the direction away from the outer ring, so that the position change of the adjusting wheel is not limited by the diameter of the ring formed by the transmission belt, and the belt wheel adjustment with larger center distance change is met.
6. As a preferred embodiment of the present invention, the initial position of the adjusting wheel is located on one side of the outer ring of the transmission belt in a natural state, and the adjusting wheel can be moved to the pre-tightening position along a direction departing from the inner ring of the transmission belt under the driving of the connecting rod. The adjusting wheel is arranged on one side of the outer ring of the transmission belt and is regulated to move to a pre-tightening position in a direction away from the inner ring, so that the inner ring and the outer ring of the transmission belt are contacted with the belt wheel, the tension force borne by the transmission belt is balanced, the transmission belt is contacted with the adjusting wheel more closely, stably and reliably, and the phenomenon of belt slipping is avoided.
7. In a preferred embodiment of the present invention, the frame is provided with guide portions which are oppositely disposed on both sides of the moving direction of the adjustment wheel to form a moving track of the adjustment wheel. The guide part guides the moving direction of the adjusting wheel, so that the influence of the vibration of the motor on the belt tensioning device is reduced, and the belt tensioning device is reliably adjusted.
8. As a preferred embodiment of the present invention, the rack includes a motor bracket for mounting the motor and a screw machine bracket for mounting the screw machine, the motor bracket is detachably connected to the screw machine bracket, and a damping member is disposed between the motor bracket and the screw machine bracket. The motor and the screw machine are installed in a separated frame mode, and the motor support for installing the motor and the screw machine support for installing the screw machine are damped through the damping piece, so that the influence of the vibration of the motor on the operation of the screw machine is reduced to the maximum extent.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic structural diagram of a belt transmission device for a screw compressor according to an embodiment of the present invention, in which a motor and a screw machine are not shown;
FIG. 2 is a cross-sectional view of the adjustment wheel in accordance with one embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a belt transmission device for a screw compressor according to another embodiment of the present invention, in which a motor and a screw machine are not shown;
fig. 4 is a schematic structural diagram of a belt transmission device for a screw compressor according to another embodiment of the present invention, in which a motor and a screw machine are not shown.
Wherein the content of the first and second substances,
1-a machine base;
2-a frame, 21-a first limiting part, 22-a second limiting part, 23-a guide part, 24-a motor bracket and 25-a screw machine bracket;
3-motor shaft, 31-driving belt pulley;
4-input shaft, 41-driven belt pulley;
5-transmission belt, 51-inner ring, 52-outer ring;
6-belt tensioning device, 61-control unit, 62-execution unit, 621-cylinder, 6211-push rod, 622-rotating rod, 623-connecting rod, 63-regulating wheel, 631-anti-slip groove.
Detailed Description
In order to more clearly explain the overall concept of the present application, the following detailed description is given by way of example in conjunction with the accompanying drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
In addition, in the description of the present invention, it is to be understood that the terms "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus are not to be construed as limiting the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
First, the technical concept of the technical solution disclosed in the present invention will be explained. In the prior art, a motor or a screw machine assembly structure with multiple assembly hole positions is usually adopted, when the model of the motor or the screw machine is changed, the motor or the screw machine or a connection structure of the motor or the screw machine or the connection structure of the motor or the screw machine is arranged at different assembly hole positions, so that the center distance between a driving wheel and a driven wheel of the motor and the screw machine is kept stable, the tension degree of a conveyor belt wheel is ensured to be matched with the center distance, but because the mode needs to manually disassemble the assembly parts of the motor or the screw machine one by one and then install the assembly parts at other hole positions, the adjustment steps are complicated, the assembly stability of the motor and the screw machine is influenced, and the transmission precision is low.
In order to solve the above problems, as shown in fig. 1 to 4, the present invention provides a belt transmission device for a screw compressor, comprising a base 1, a frame 2, a motor mounted on the frame 2, and a screw machine driven by the motor, wherein a motor shaft 3 of the motor is fixedly provided with a driving pulley 31, an input shaft 4 of the screw machine is fixedly provided with a driven pulley 41, the driving pulley 31 and the driven pulley 41 are connected through a transmission belt 5, the belt transmission device further comprises a belt tensioning device 6, the belt tensioning device 6 comprises a control unit 61 electrically connected with the transmission belt 5, an execution unit 62 controlled by the control unit 61, and an adjusting wheel 63 contacted with the transmission belt 5 and driven by the execution unit 62, the control unit 61 generates an electric signal according to the tension of the transmission belt 5, the execution unit 62 moves or rotates according to the electric signal and drives the adjusting wheel 63 to change position, to vary the tension of the drive belt 5 and to make the wrap angle α of the driven pulley 41 satisfy: alpha is more than or equal to 190 degrees and less than or equal to 210 degrees.
In the invention, the belt tensioning device 6 is adopted to adjust the tensioning degree of the transmission belt 5, the belt tensioning device 6 is independent of the assembly structure of the motor and the screw machine, and the structure of a nut, a connecting piece and the like for assembly does not need to be loosened in the whole adjusting process, so that the assembly position, the assembly structure and the connection relation of the motor and the screw machine are not influenced by the structural stability; the control unit 61 generates corresponding electric signals for loosening or pre-tightening the belt according to the tension of the transmission belt 5, the execution unit 62 capable of receiving the electric signals changes the position of the adjusting wheel 63, and the contact state of the adjusting wheel 63 and the transmission belt 5 is adjusted to change the tension degree of the transmission belt 5, so that the tension degree of the transmission belt 5 is adapted to the changed center distance, and the adjusting process is automatic, convenient and reliable.
By adopting the self-adaptive control type belt tension adjustment, the force applied to the adjusting wheel 63 by the execution unit 62 is needed to make the adjusting wheel 63 additionally apply tension to the transmission belt 5 to assist the transmission belt 5 to make the transmission belt 5 and the belt wheel closely contact for transmission, the wrap angle alpha of the driven belt pulley 41 is limited to be more than or equal to 190 degrees and less than or equal to 210 degrees, the friction force generated on the contact surface of the transmission belt 5 and the belt wheel is stably larger than the component force of the transmission belt 5 in the opposite direction of the movement direction of the transmission belt 5, the slipping phenomenon of the transmission belt 5 is avoided, in the range, the tension applied to the transmission belt 5 by the adjusting wheel 63 is reasonable, the range of the strength which can be born by the belt tensioning device 6 is not exceeded, the requirements on the strength of the adjusting wheel 63 and the execution unit 62 are further reduced, the durability of the belt tensioning device 6 is enhanced, and the stress of the transmission belt 5 at the contact stress part with the adjusting wheel 63 is not too large, the occurrence of the breakage of the transmission belt 5 is avoided.
As a preferred embodiment of the present invention, as shown in fig. 1, 3 and 4, the adjusting wheel 63 has a slack position for decreasing the tension of the driving belt 5 and a pre-tension position for increasing the tension of the driving belt 5, the control unit 61 can generate different electric signals, and the execution unit 62 drives the adjusting wheel 63 to reciprocate between the slack position and the pre-tension position according to the different electric signals.
The control unit 61 can generate one of two electric signals for the execution unit 62 to generate different motion states according to the judgment of the tension of the transmission belt 5, and change the contact state of the adjusting wheel 63 and the transmission belt 5, so that the self-adaptive adjustment of the tension degree of the transmission belt 5 to the change of the center distance is achieved, and the flexibility and the accuracy of the adjustment are improved. When the control unit 61 detects that the tension of the transmission belt 5 is too small, the control unit 61 generates a signal for enabling the execution unit 62 to drive the adjusting wheel 63 to move to a pre-tightening position, and the adjusting wheel 63 applies enhanced tension to the transmission belt 5 so as to enhance the tension of the transmission belt 5; when the control unit 61 detects that the tension of the transmission belt 5 is too large, the control unit 61 generates a signal for driving the adjusting wheel 63 to move to the loosening position by the execution unit 62, and the tension applied to the transmission belt 5 by the adjusting wheel 63 is reduced, so that the tension applied to the transmission belt 5 is reduced.
The driving and matching manner of the actuating element and the adjusting wheel 63 is not particularly limited in the present invention, and any one of the following embodiments may be adopted:
embodiment 1: as shown in fig. 1, the executing unit 62 includes an air cylinder 621 capable of receiving an electrical signal, and a rotating rod 622 hinged to the base 1, wherein one end of the rotating rod 622 is fixedly connected to the adjusting wheel 63, and the rotating rod 622 abuts against a push rod 6211 of the air cylinder 621 and is pushed by the push rod 6211 to drive the adjusting wheel 63 to rotate back and forth between a relaxed position and a pre-tightening position.
When the control unit 61 detects that the tension of the transmission belt 5 is too small, the push rod 6211 of the air cylinder 621 extends out under the control of the control unit 61, and the push rod 6211 pushes the rotating rod 622 to rotate so as to drive the adjusting wheel 63 to rotate to the pre-tightening position, so that the effect of increasing the tension of the transmission belt 5 is achieved, and the effect of adapting to the increased center distance is achieved; when the control unit 61 detects that the tension of the transmission belt 5 is too large, the push rod 6211 of the air cylinder 621 retracts under the control of the electric signal of the control unit 61, so that the rotating rod 622 rotates and drives the adjusting wheel 63 to move from the pre-tightening position to the loosening position, and the tension of the transmission belt 5 is reduced to adapt to the reduced center distance. The rotating rod 622 is driven to rotate to change the position of the adjusting wheel 63 through the rotation of the push rod 6211 of the air cylinder 621, the adjusting wheel 63 slides and shifts along the parallel direction of the surface of the transmission belt 5, and then the component force of the tension of the transmission belt 5 by the rotating rod 622 along the tangential direction of the transmission belt 5 is reduced, the load borne by the transmission belt is reduced, and the service life of the transmission belt 5 is prolonged.
As a preferred example in this embodiment, as shown in fig. 1 and 2, the peripheral surface of the regulating wheel 63 is recessed inward to form a slip-off preventing groove 631 into which the drive belt 5 is fitted.
The motor can produce vibrations when high-speed operation, and vibrations can be transmitted drive belt 5 and influence drive belt 5's transmission effect, and under this embodiment, set up the anticreep groove 631 that can make drive belt 5 embedding on regulating wheel 63 round peripheral surface, anticreep groove 631 restricts the slip orbit of going out drive belt 5 and in order to alleviate the drive belt 5's of high-speed motion rocking phenomenon, has prevented drive belt 5's slippage phenomenon.
As a preferred example of the present embodiment, as shown in fig. 1, the frame 2 is provided with a first stopper 21 and a second stopper 22 in a protruding manner, the first stopper 21 is provided at a limit turning position on one side of the rotating lever 622 so as to correspond to a limit position of a loose position of the adjustment wheel 63, and the second stopper 22 is provided at a limit turning position on the other side of the rotating lever 622 so as to correspond to a limit position of a pre-tightening position of the adjustment wheel 63.
Limiting the limit positions of the rotating rod 622 and the adjusting wheel 63 prevents the adjusting wheel 63 from transitionally interfering the tension degree of the transmission belt 5, and avoids the problems of belt clamping or sliding of the transmission belt 5 and the like. The first limiting part 21 and the second limiting part 22 correspond to two limit positions of a rotating track of the rotating rod 622, so that a stroke position of the adjusting wheel 63 fixedly connected with the rotating rod 622 is limited, the first limiting part 21 limits the limit position of the rotating rod 622 rotating towards the direction far away from the push rod 6211, the boundary position which can be reached corresponding to a pre-tightening position of the adjusting wheel 63 crosses the boundary position limited by the first limiting part 21, and the tension of the adjusting wheel 63 borne by the transmission belt 5 is possibly overlarge, so that the belt clamping problem of the transmission belt 5 is avoided due to the arrangement of the first limiting part 21; the second position-limiting portion 22 limits the limit position of the rotating rod 622 to the direction close to the push rod 6211, and the limit position corresponding to the boundary position that the slack position of the adjusting wheel 63 can reach exceeds the boundary position defined by the second position-limiting portion 22, so that the tension of the adjusting wheel 63 on the transmission belt 5 may not meet the tension required by the transmission belt 5 to adapt to the current center distance, and the arrangement of the second position-limiting portion 22 avoids the problem of belt slipping of the transmission belt 5.
Embodiment 2: as shown in fig. 3 and 4, the actuating unit 62 includes an air cylinder 621 capable of receiving an electrical signal, and a connecting rod 623 fixedly connected to a push rod 6211 of the air cylinder 621, one end of the connecting rod 623 is fixedly connected to the adjusting wheel 63, and when the push rod 6211 moves, the connecting rod 623 drives the adjusting wheel 63 to reciprocate between the relaxed position and the pre-tightening position.
When the control unit 61 detects that the tension of the transmission belt 5 is too small, the push rod 6211 of the air cylinder 621 extends out under the control of the control unit 61, and the push rod 6211 drives the connecting rod 623 fixedly connected with the push rod 6211 to translate so as to enable the adjusting wheel 63 to translate to the pre-tightening position, so that the tension of the adjusting wheel 63 on the transmission belt 5 is enhanced, and the transmission belt 5 is adapted to a smaller center distance; when the control unit 61 detects that the tension of the transmission belt 5 is too large, the push rod 6211 of the air cylinder 621 retracts under the control of the control unit 61, and the connecting rod 623 returns along with the push rod 6211, so that the adjusting wheel 63 translates to the loosening position, the tension of the adjusting wheel 63 on the transmission belt 5 is further reduced, and the transmission belt 5 is adapted to the enlarged center distance. The push rod 6211 of the air cylinder 621 drives the connecting rod 623 to translate so as to change the position of the adjusting wheel 63, the adjusting wheel 63 is abutted and translated with the transmission belt 5 along the tangential direction of the belt surface of the transmission belt 5, the translational motion track is fixed and simple, the adjusting reliability is enhanced, the translation direction of the adjusting wheel 63 enables the adjusting stroke to be greatly shortened, and the adjusting efficiency is enhanced.
The present invention is not particularly limited to the relationship between the initial position of the adjustment wheel 63 and the position of the transmission belt 5, and any one of the following embodiments may be employed:
example 1: as shown in fig. 3, the initial position of the adjusting wheel 63 is located on the inner ring 51 side of the transmission belt 5 in the natural state, and the adjusting wheel 63 can be moved to the pre-tightening position in the direction away from the outer ring 52 of the transmission belt 5 by the connecting rod 623.
The initial position of the adjusting wheel 63 is arranged on one side of the inner ring 51 of the transmission belt 5, the adjusting wheel is regulated to move to the pre-tightening position in the direction away from the outer ring 52, after the model of a motor or a screw machine is changed, when the change of the center distance is overlarge, the transmission belt 5 needs to obtain larger tension of the adjusting wheel 63 so as to enhance the self-tightening degree, the initial position of the adjusting wheel 63 is regulated on one side of the inner ring 51 of the transmission belt 5, the moving stroke of the adjusting wheel 63 to the pre-tightening position is not limited by the diameter of the ring formed by the transmission belt 5, the position adjustment of the adjusting wheel 63 and the deformation of the transmission belt 5 are facilitated, and the belt wheel adjustment with the larger change of the center distance is.
Example 2: as shown in fig. 4, the initial position of the adjusting wheel 63 is located on the outer ring 52 side of the transmission belt 5 in the natural state, and the adjusting wheel 63 can be moved to the pre-tightening position in the direction away from the inner ring 51 of the transmission belt 5 by the connecting rod 623.
The initial position of the adjusting wheel 63 is arranged on one side of the outer ring 52 of the transmission belt 5, and the adjusting wheel is regulated to move to a pre-tightening position in a direction away from the inner ring 51, so that in the process of changing the position of the adjusting wheel 63 and in the state of finishing final adjustment, the inner ring 51 and the outer ring 52 of the transmission belt 5 are both contacted by belt wheels, wherein the driving belt wheel 31 and the driven belt wheel 41 are contacted with the inner ring 51 of the transmission belt 5, the adjusting wheel 63 is contacted with the outer ring 52 of the transmission belt 5, part of tension applied to the transmission belt 5 by the adjusting wheel 63 can be offset with the tension applied to the transmission belt 5 by the driving belt wheel 31 and the driven belt wheel 41, the effect of balancing the tension applied to the transmission belt 5 is achieved, the contact between the transmission belt 5 and the adjusting wheel 63 is more close, stable and reliable, and the belt slipping phenomenon is avoided.
It should be noted that, for the relationship between the initial position of the adjusting wheel 63 and the position of the transmission belt 5, in another embodiment, two adjusting wheels 63 are attached to the connecting rod 623, wherein one adjusting wheel 63 contacts with the inner ring 51 of the transmission belt 5, the other adjusting wheel 63 contacts with the outer ring 52 of the transmission belt 5, the control unit 61 generates a corresponding electrical signal according to the magnitude of the tension of the transmission belt 5, and the execution unit 62 receives the electrical signal and drives at least one adjusting wheel 63 to contact with the transmission belt 5, so as to adjust the tension of the transmission belt 5. In the adjusting process, only the adjusting wheel 63 in contact with the outer ring 52 of the transmission belt 5 can participate in adjustment, only the adjusting wheel 63 in contact with the inner ring 51 of the transmission belt 5 can participate in adjustment, or two adjusting wheels 63 can participate in adjustment at the same time, so that the adjusting of the transmission belt 5 with large center distance change is met, the tensioning force of the transmission belt 5 in the adjusting process is balanced, and the purpose of stable transmission is achieved.
As a preferred embodiment of the present invention, as shown in fig. 3 and 4, the frame 2 is provided with guide portions 23, and the guide portions 23 are oppositely disposed on both sides of the moving direction of the adjustment wheel 63 to form a moving track of the adjustment wheel 63.
The guide parts 23 are arranged on the frame 2 in a protruding mode, the guide parts 23 are oppositely arranged on two sides of the moving direction of the adjusting wheel 63 to form the moving track of the adjusting wheel 63, and the guide parts 23 guide the moving direction of the adjusting wheel 63, so that the influence of the vibration of the motor on the belt tensioning device 6 is reduced, and the belt tensioning device 6 is adjusted reliably.
As a preferred embodiment of the invention, the frame 2 comprises a motor bracket 23 for mounting a motor and a screw machine bracket 25 for mounting a screw machine, the motor bracket 23 is detachably connected with the screw machine bracket 25, and a damping piece is arranged between the motor bracket 23 and the screw machine bracket 25.
The motor and the screw machine are installed in a separated frame mode, and the shock absorption is carried out between the motor support 23 for installing the motor and the screw machine support 25 for installing the screw machine through the shock absorption piece, so that the influence of the vibration of the motor on the operation of the screw machine is reduced to the maximum extent. It should be noted that, the detachable connection mode of the motor bracket 23 and the screw machine bracket 25 is not limited in the present invention, and the motor bracket may be connected with the screw machine bracket by bolts, may be connected by interference fit of the insertion holes and the insertion posts, or may be connected by other detachable structures. The type of the damping piece is not limited in the invention, and a damping gasket can be arranged at the joint of the motor support 23 and the screw machine support 25, or a damping spring can be arranged at the joint of the motor support 23 and the screw machine support 25.
The method can be realized by adopting or referring to the prior art in places which are not described in the invention.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments.
The above description is only an example of the present invention, and is not intended to limit the present invention. Various modifications and alterations to this invention will become apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (10)
1. A belt transmission device for a screw compressor comprises a base, a frame, a motor arranged on the frame and a screw machine driven by the motor, wherein a motor shaft of the motor is fixedly provided with a driving belt pulley, an input shaft of the screw machine is fixedly provided with a driven belt pulley, the driving belt pulley is connected with the driven belt pulley through a transmission belt,
still include belt tightener, belt tightener include with the control unit that the drive belt electricity is connected, receive the execution unit that control unit controlled and with drive belt contact and receive the regulating wheel of execution unit drive, the control unit according to drive belt's tensile force size produces the signal of telecommunication, the execution unit according to the signal of telecommunication is removed or is rotated and drive the regulating wheel changes the position, with the tensioning degree that changes drive belt and make driven pulley's cornerite alpha satisfy: alpha is more than or equal to 190 degrees and less than or equal to 210 degrees.
2. The belt transmission for screw compressors according to claim 1,
the adjusting wheel is provided with a relaxation position and a pre-tightening position, the relaxation position enables the tension force of the transmission belt to be reduced, the pre-tightening position enables the tension force of the transmission belt to be enhanced, the control unit can generate different electric signals, and the execution unit drives the adjusting wheel to reciprocate between the relaxation position and the pre-tightening position according to the different electric signals.
3. The belt transmission for screw compressors according to claim 2,
the execution unit comprises an air cylinder capable of receiving the electric signal and a rotating rod hinged to the base, one end of the rotating rod is fixedly connected with the adjusting wheel, the rotating rod abuts against a push rod of the air cylinder and is pushed by the push rod to drive the adjusting wheel to rotate back and forth between the loosening position and the pre-tightening position.
4. The belt transmission device of claim 3, wherein the circumferential surface of the adjustment wheel is recessed inward to form a slip-off preventing groove for the transmission belt to be inserted.
5. The belt transmission for screw compressors according to claim 3,
the frame is convexly provided with a first limiting part and a second limiting part, the first limiting part is arranged at the limit rotating position on one side of the rotating rod to correspond to the limit position of the loosening position of the adjusting wheel, and the second limiting part is arranged at the limit rotating position on the other side of the rotating rod to correspond to the limit position of the pre-tightening position of the adjusting wheel.
6. The belt transmission for screw compressors according to claim 2,
the execution unit comprises an air cylinder capable of receiving the electric signal and a connecting rod fixedly connected with a push rod of the air cylinder, one end of the connecting rod is fixedly connected with the adjusting wheel, and when the push rod moves, the connecting rod drives the adjusting wheel to reciprocate between the loosening position and the pre-tightening position.
7. The belt transmission for screw compressors according to claim 6,
the initial position of the adjusting wheel is located on one side of the inner ring of the transmission belt in a natural state, and the adjusting wheel can move to the pre-tightening position along the direction departing from the outer ring of the transmission belt under the driving of the connecting rod.
8. The belt transmission for screw compressors according to claim 6,
the initial position of the adjusting wheel is located on one side of the outer ring of the transmission belt in a natural state, and the adjusting wheel can move to the pre-tightening position along the direction departing from the inner ring of the transmission belt under the driving of the connecting rod.
9. The belt transmission for screw compressors according to claim 1,
the frame is provided with a guide part which is oppositely arranged at two sides of the moving direction of the adjusting wheel so as to form a moving track of the adjusting wheel.
10. The belt transmission for screw compressors according to claim 1,
the frame is including the installation the motor support of motor and installation the screw rod machine support of screw rod machine, the motor support with the connection can be dismantled to the screw rod machine support, just the motor support with be equipped with the shock attenuation piece between the screw rod machine support.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110915102.6A CN113417854A (en) | 2021-08-10 | 2021-08-10 | Belt transmission device for screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110915102.6A CN113417854A (en) | 2021-08-10 | 2021-08-10 | Belt transmission device for screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113417854A true CN113417854A (en) | 2021-09-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110915102.6A Withdrawn CN113417854A (en) | 2021-08-10 | 2021-08-10 | Belt transmission device for screw compressor |
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| Country | Link |
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| CN (1) | CN113417854A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060275A (en) * | 2021-11-26 | 2022-02-18 | 江西智奇压缩机有限公司 | Single-stage screw air compressor with damping mechanism on base |
| CN114135488A (en) * | 2021-12-10 | 2022-03-04 | 德哈哈压缩机江苏有限公司 | Tensioning adjusting device and method for transmission assembly of energy-saving screw compressor |
| CN114474868A (en) * | 2021-12-22 | 2022-05-13 | 安徽恒易纸业有限公司 | Release paper embossing device for water-based leather production and working method thereof |
| CN115153394A (en) * | 2022-08-17 | 2022-10-11 | 湖南省华芯医疗器械有限公司 | Deflection adjusting mechanism, handle, endoscope and endoscope using method |
-
2021
- 2021-08-10 CN CN202110915102.6A patent/CN113417854A/en not_active Withdrawn
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114060275A (en) * | 2021-11-26 | 2022-02-18 | 江西智奇压缩机有限公司 | Single-stage screw air compressor with damping mechanism on base |
| CN114060275B (en) * | 2021-11-26 | 2024-02-02 | 江西智奇压缩机有限公司 | Single-stage screw air compressor with base provided with damping mechanism |
| CN114135488A (en) * | 2021-12-10 | 2022-03-04 | 德哈哈压缩机江苏有限公司 | Tensioning adjusting device and method for transmission assembly of energy-saving screw compressor |
| CN114474868A (en) * | 2021-12-22 | 2022-05-13 | 安徽恒易纸业有限公司 | Release paper embossing device for water-based leather production and working method thereof |
| CN114474868B (en) * | 2021-12-22 | 2024-02-27 | 安徽恒易纸业有限公司 | Release paper embossing device for producing water-based leather and working method thereof |
| CN115153394A (en) * | 2022-08-17 | 2022-10-11 | 湖南省华芯医疗器械有限公司 | Deflection adjusting mechanism, handle, endoscope and endoscope using method |
| CN115153394B (en) * | 2022-08-17 | 2023-12-26 | 湖南省华芯医疗器械有限公司 | Deflection adjusting mechanism, handle, endoscope and using method of endoscope |
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Application publication date: 20210921 |
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