Wheel axle generator set

Abstract

This invention discloses a wheel-axle generator set, belonging to the field of power generation equipment technology. It includes: a motor, a generator, and at least one torque amplification transmission unit connected between the two. The torque amplification transmission unit is configured to amplify the driving torque output by the motor and transmit it to the input shaft of the generator, thereby driving the generator to overcome the electromagnetic resistance torque during startup and operation and to rotate and perform work. This invention achieves effective matching between the output torque of the motor and the load torque of the generator, enabling a small-power motor to drive a high-power generator to operate stably and generate electricity. It is widely applicable to various application scenarios requiring a small-power prime mover to drive a high-power generator.

Description

Technical Field

[0001] This invention relates to the field of power generation equipment technology, and in particular to a wheel-axle generator set. Background Technology

[0002] In existing technologies, when an electric motor is used to drive a generator, the rated power of the motor is typically required to be greater than or equal to the rated power of the generator to ensure that the motor has sufficient power to overcome the electromagnetic resistance torque of the generator and allow it to rotate normally. In practical applications, when the output torque of the motor is less than the starting electromagnetic resistance torque of the generator, the motor may stall, overheat, or even burn out due to overload, failing to achieve stable power generation. Therefore, existing technologies lack a mechanical transmission solution that can effectively match the output characteristics of the electric motor with the load characteristics of the generator, enabling a small-power motor to start smoothly and drive a large-power generator to operate normally.

[0003] Therefore, it is necessary to provide a wheel-axle generator set to overcome the above-mentioned defects. Summary of the Invention

[0004] The purpose of this invention is to provide a wheel-axle generator set, which aims to solve the problem in the prior art that small-power motors cannot effectively drive large-power generators to operate stably due to insufficient output torque, and to achieve torque matching between the motor and the generator, so as to ensure that the generator set can start reliably and generate electricity continuously.

[0005] To achieve the above objectives, the present invention provides a wheel-axle generator set, comprising: Electric motor; The generator has a rated power greater than that of the electric motor; At least one torque amplification transmission unit is connected between the electric motor and the generator; The at least one stage torque amplification transmission unit is configured to amplify the driving torque output by the motor and transmit it to the input shaft of the generator to drive the generator to rotate and do work, overcoming the electromagnetic resistance torque during its startup and operation.

[0006] In a preferred embodiment, the at least one stage torque amplification transmission unit is a wheel-axle transmission unit, comprising: A primary drive wheel is fixed to the output shaft of the electric motor; A primary axle is connected to the primary drive wheel via a primary transmission belt; The radius of the first-stage axle is greater than the radius of the first-stage drive wheel to achieve first-stage torque amplification.

[0007] In a preferred embodiment, the at least one stage torque amplification transmission unit further includes: The secondary drive wheel is fixedly mounted coaxially with the axle of the primary wheel. The secondary axle is connected to the secondary drive wheel via a secondary transmission belt, and the secondary axle is fixed on the input shaft of the generator; The radius of the secondary wheel axle is greater than the radius of the secondary drive wheel to achieve a second-stage torque amplification.

[0008] In a preferred embodiment, the primary axle and the secondary drive wheel are fixed on the same rotating shaft, and the axes of the primary axle, the secondary drive wheel and the rotating shaft coincide.

[0009] In a preferred embodiment, the radius ratio of the first-stage axle to the first-stage drive wheel, and the radius ratio of the second-stage axle to the second-stage drive wheel, are adapted to the rated power of the generator and the electromagnetic resistance torque required for its startup, and in conjunction with the rated output torque of the motor.

[0010] In a preferred embodiment, the primary drive belt is tightly fitted onto the primary drive pulley and the primary axle to achieve slip-free power transmission.

[0011] The wheel-axle generator set provided by this invention utilizes the lever principle of the wheel-axle (power × wheel radius = resistance × shaft radius) by setting at least one stage of torque amplification transmission unit (such as a wheel-axle) between the motor and the generator. When the driving force (power) output by the motor acts on the larger wheel radius of the wheel-axle, an amplified force (resistance) is generated on the smaller shaft radius. This amplified force acts on the input shaft of the generator, forming an amplified driving torque. This amplifies the inherent, relatively small output torque of the motor to a level sufficient to overcome the electromagnetic resistance torque required for generator startup and operation. Consequently, a motor with a smaller rated power and output torque can drive a generator with a larger rated power and a larger required starting torque to rotate stably, expanding the range of motor-generator driving capabilities and solving the problem of system malfunction due to torque mismatch. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A schematic diagram of the wheel-axle generator set provided by the present invention; Figure 2 for Figure 1A schematic diagram of the axle generator set from another angle. Detailed Implementation

[0014] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are merely for explaining the invention and are not intended to limit the invention.

[0015] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0016] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0017] In an embodiment of the present invention, a wheel-axle generator set 100 is provided. The core concept is to install at least one torque amplification transmission unit between the motor and the generator. This unit, based on the lever principle of the wheel-axle, amplifies the relatively small driving torque output by the motor through a reasonable radius ratio design. This amplifies the electromagnetic resistance torque, which is much greater than the rated torque of the motor, during generator startup and operation, thereby achieving stable and continuous operation of the generator. The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0018] Example 1 like Figure 1 and Figure 2 As shown, a wheel-axle generator set of the present invention includes: a motor 1, a generator 12, and at least one stage of torque amplification transmission unit connected between the two.

[0019] Specifically, motor 1 acts as the prime mover, providing initial power to the entire system. In an exemplary embodiment, motor 1 can be an asynchronous motor with a rated voltage of 220V, a rated power of 200W, and a synchronous speed of 3000r / min.

[0020] The rated power of generator 12 is greater than that of motor 1. In this embodiment, generator 12 can be a low-speed DC permanent magnet brushless three-phase wind turbine generator with a rated voltage of 60V, a rated power of 600W, and a rated speed of 600r / min. The rated power of this generator is three times that of the motor, and the electromagnetic resistance torque required for its start-up and operation is much greater than the torque that motor 1 can directly output.

[0021] Among them, at least one torque amplification transmission unit is configured to amplify the driving torque output by the motor 1 and transmit it to the input shaft 13 of the generator 12 to drive the generator 12 to rotate and do work by overcoming the electromagnetic resistance torque during its start-up and operation.

[0022] It should be noted that the principle of this invention is as follows: by utilizing a wheel and axle or a similar lever mechanism, torque is amplified through the difference in distance between the point of force application and the center of rotation. Specifically, when the driving force (power) output by the motor 1 acts on the input end of the torque amplification unit (equivalent to the effort arm of the lever), as long as the distance from the input end to the center of rotation (effort arm) is greater than the distance from the output end to the center of rotation (resistance arm), a force greater than the input force can be obtained at the output end. This force acts on the radius of the input shaft 13 of the generator 12, thus generating an amplified driving torque.

[0023] Therefore, by introducing a torque amplification transmission unit, this invention successfully matches a motor 1 with a smaller rated power and output torque with a generator 12 with a larger rated power and a greater required starting torque. It does not attempt to amplify power, but rather, through torque conversion, enables the motor to "lever" a generator load far exceeding its direct driving capacity. This solves the core problem of system malfunction caused by insufficient torque, providing a new technical path for constructing efficient power generation systems, saving labor and effort.

[0024] Example 2 Furthermore, based on Example 1, such as Figure 1 As shown, at least one stage of torque amplification transmission unit is a wheel and axle transmission unit, which includes a first-stage driving wheel 3 and a first-stage wheel and axle 5.

[0025] Specifically, the primary drive wheel 3 is fixed to the output shaft 2 of the motor 1. To ensure a stable connection for torque transmission, the two can be connected by a key (such as a flat key or a semi-circular key) or a keyless tension sleeve. In this embodiment, the radius of the primary drive wheel 3 is set to R1.

[0026] The primary axle 5 is connected to the primary drive pulley 3 via a primary transmission belt 4. The primary transmission belt 4 is tightly fitted onto the primary drive pulley 3 and the primary axle 5. The transmission belt can be a common V-belt or a multi-ribbed belt for smoother transmission and higher load capacity. The radius R2 of the primary axle 5 is larger than the radius R1 of the primary drive pulley 3 to achieve first-stage torque amplification. In this embodiment, the ratio of R2 to R1 (i.e., the first-stage amplification ratio) is 6:1. Specifically, if the radius R1 of the primary drive pulley is 1 unit length, then the radius R2 of the primary axle is 6 units length.

[0027] It is understandable that the initial torque output by motor 1 is M1 = F1 × R1 (F1 is the equivalent tangential force exerted by the belt drive on the flange of the first-stage drive pulley 3). When the power is transmitted to the first-stage axle 5 through the first-stage transmission belt 4, the tension F1 on the transmission belt remains essentially unchanged without considering transmission losses. Since the radius of the first-stage axle 5 is larger (R2 > R1), according to the torque formula M = F × R, the torque generated on the first-stage axle 5 is M2 = F1 × R2. Because R2 > R1, M2 > M1, thus achieving first-stage torque amplification.

[0028] Therefore, by employing belt drive and axle structure, not only is the physical amplification of the first-stage torque achieved, but the belt drive itself also possesses advantages such as smooth transmission, vibration damping, and slippage protection for the entire machine under overload. This amplification provides the basic torque gain for the subsequent generator drive and is the first step in solving the torque mismatch problem.

[0029] Example 3 Furthermore, based on Example 2, in order to obtain a greater torque amplification effect to match generators with larger power differences, such as... Figure 1 As shown, at least one stage of torque amplification transmission unit also includes: a secondary drive wheel 6 and a secondary wheel shaft 11.

[0030] Specifically, the secondary drive wheel 6 and the primary wheel axle 5 are coaxially fixed and can be fixed on the same rotating shaft 7 to ensure that the amplified torque on the primary wheel axle 5 can be transmitted to the secondary drive wheel 6 without loss.

[0031] The secondary axle 11 is connected to the secondary drive pulley 6 via the secondary transmission belt 10, and the secondary axle 11 is fixed to the input shaft 13 of the generator 12. Similar to the primary stage, the secondary transmission belt 10 is tightly fitted onto the secondary drive pulley 6 and the secondary axle 11. The radius (R4) of the secondary axle 11 is larger than the radius (R3) of the secondary drive pulley 6 to achieve second-stage torque amplification. In this embodiment, the radius R3 of the secondary drive pulley 6 can be the same as or different from the radius R2 of the primary axle 5, and its ratio to the radius R4 of the secondary axle 11 (i.e., the second-stage amplification ratio) is 5:1. For example, if the radius R3 of the secondary drive pulley is 1 unit length, then the radius R4 of the secondary axle is 5 units length.

[0032] It is understandable that the first-stage amplified torque M2 = F1 × R2, which drives the second-stage drive wheel 6 to rotate, generating a tangential force F2 = M2 / R3 on the rim of the second-stage drive wheel 6. This force is transmitted to the second-stage axle 11 through the second-stage transmission belt 10. Since the radius R4 of the second-stage axle 11 is larger than the radius R3 of the second-stage drive wheel 6, the torque generated on the second-stage axle 11 is M3 = F2 × R4 = (M2 / R3) × R4 = F1 × (R2 / R3) × R4. Since (R2 / R3) × R4 > 1, and in this embodiment, the total amplification ratio is (R2 / R1) × (R4 / R3) = 6 × 5 = 30 times, thus achieving further amplification of the second-stage torque.

[0033] Therefore, by using two-stage amplification, a single-stage amplification effect of several times or even tens of times can be achieved, easily matching large generators with higher starting torque requirements. Furthermore, by adjusting the amplification ratio between the two stages (e.g., a combination of 6:1 and 5:1), different specifications of motors and generators can be matched more flexibly and precisely, greatly expanding the scope of application of this invention.

[0034] Example 4 Furthermore, based on Example 3, in order to ensure transmission efficiency and a compact structure, such as Figure 1 As shown, the first-stage wheel axle 5 and the second-stage driving wheel 6 are fixed on the same rotating shaft 7, and the axes of the first-stage wheel axle 5, the second-stage driving wheel 6 and the rotating shaft 7 coincide.

[0035] Therefore, through a coaxial design, the first-stage axle 5 and the second-stage drive wheel 6 are rigidly mounted as a single unit on the rotating shaft 7. Both ends of the rotating shaft 7 are mounted in bearing housings (8, 9) via rolling bearings to achieve free rotation with low friction. This coaxial structure ensures that the amplified torque from the first stage can be transmitted 100% without loss to the input end of the second stage, avoiding energy loss and structural complexity caused by using couplings or additional transmission links. Simultaneously, it guarantees absolute synchronization between the two rotating components, improving transmission accuracy and the overall structural compactness.

[0036] Example 5 Furthermore, based on embodiment 3 or 4, in order to achieve precise torque matching, the radius ratio of the first-stage axle 5 to the first-stage drive wheel 3, and the radius ratio of the second-stage axle 11 to the second-stage drive wheel 6, are adapted to the rated power of the generator 12 and the electromagnetic resistance torque required for its start-up, and in combination with the rated output torque of the motor 1.

[0037] It should be noted that in engineering practice, the electromagnetic resistance torque of a generator is not a constant value. It is related to factors such as the generator's load, speed, and internal magnetic field strength. Especially at startup, the required starting torque is often much greater than the rated operating torque. Therefore, when designing a torque amplification unit, it is not possible to simply estimate based on the ratio of rated power. Instead, it is necessary to obtain the generator's starting electromagnetic resistance torque and rated operating electromagnetic resistance torque based on its technical parameters or measured data. Simultaneously, the rated output torque of the motor needs to be obtained. Therefore, the required total torque amplification ratio should at least be greater than the ratio of the starting electromagnetic resistance torque to the rated operating electromagnetic resistance torque. Subsequently, the total amplification ratio is rationally distributed to each stage of the wheel and axle drive, thereby determining the radius ratio of the first-stage wheel and axle 5 to the first-stage driving wheel 3, and the radius ratio of the second-stage wheel and axle 11 to the second-stage driving wheel 6.

[0038] Therefore, this embodiment directly links the design of the transmission mechanism with the real, measurable physical load (the electromagnetic resistance torque of the generator), so that the torque matching design of the entire generator set is based on scientific and objective engineering data, avoiding purely theoretical calculations detached from the actual load, ensuring the operability and practicality of the technical solution, and fundamentally guaranteeing that the generator set of the present invention can start reliably and operate stably, thereby overcoming the defect of the previous application that was "not practical" due to ignoring the conservation of energy and relying solely on idealized "effort-saving" calculations.

[0039] Example 6 Furthermore, based on any of Embodiments 2-5, to ensure the reliability of power transmission, the primary drive belt 4 and / or the secondary drive belt 10 are tightly fitted onto the corresponding drive pulley and axle to achieve slip-free power transmission. During installation, the drive belts achieve the designed initial preload by adjusting the center distance or using a tensioning pulley. During operation, excessive load fluctuations may also cause slippage; this design avoids torque loss and energy waste due to slippage, ensuring that the designed torque amplification factor is accurately and stably transmitted to the generator. This not only improves the overall operating efficiency and reliability of the generator set but also reduces heat and noise generated by slippage, extending the service life of the drive belts and related components.

[0040] In summary, this invention, by setting up one or more torque amplification transmission units based on the wheel and axle principle and by designing a precise amplification ratio based on the output torque of the motor and the electromagnetic resistance torque of the generator, successfully achieves stable and reliable driving of a small-power motor to a high-power generator, providing a brand-new and practical solution for the design of energy-saving power generation equipment.

[0041] The present invention is not limited to the description in the specification and embodiments, and thus other advantages and modifications can be readily realized by those skilled in the art. Therefore, the present invention is not limited to the specific details, representative devices and illustrated examples shown and described herein without departing from the spirit and scope of the general concept as defined by the claims and their equivalents.

Claims

1. A wheel-axle generator set, characterized in that, include: Electric motor (1); The generator (12) has a rated power greater than that of the motor (1); At least one torque amplification transmission unit is connected between the motor (1) and the generator (12); The at least one torque amplification transmission unit is configured to amplify the driving torque output by the motor (1) and transmit it to the input shaft (13) of the generator (12) to drive the generator (12) to rotate and do work by overcoming the electromagnetic resistance torque during its start-up and operation.

2. The wheel-axle generator set according to claim 1, characterized in that, The at least one stage torque amplification transmission unit is a wheel and axle transmission unit, including: A primary drive wheel (3) is fixed on the output shaft (2) of the electric motor (1); A primary axle (5) is connected to the primary drive wheel (3) via a primary transmission belt (4); The radius of the first-stage axle (5) is greater than the radius of the first-stage drive wheel (3) to achieve first-stage torque amplification.

3. The wheel-axle generator set according to claim 2, characterized in that, The at least one stage torque amplification transmission unit further includes: The secondary drive wheel (6) is coaxially fixed with the primary wheel axle (5); The secondary wheel axle (11) is connected to the secondary drive wheel (6) via the secondary transmission belt (10), and the secondary wheel axle (11) is fixed on the input shaft (13) of the generator (12); The radius of the secondary wheel axle (11) is greater than the radius of the secondary drive wheel (6) to achieve a second-stage torque amplification.

4. The wheel-axle generator set according to claim 3, characterized in that, The primary axle (5) and the secondary drive wheel (6) are fixed on the same rotating shaft (7), and the axes of the primary axle (5), the secondary drive wheel (6) and the rotating shaft (7) coincide.

5. The wheel-axle generator set according to claim 3, characterized in that, The radius ratio of the first-stage axle (5) to the first-stage drive wheel (3), and the radius ratio of the second-stage axle (11) to the second-stage drive wheel (6), are adapted to the rated power of the generator (12) and the electromagnetic resistance torque required for its start-up, and are combined with the rated output torque of the motor (1).

6. The wheel-axle generator set according to claim 2, characterized in that, The primary drive belt (4) is tightly fitted onto the primary drive wheel (3) and the primary wheel axle (5) to achieve slip-free power transmission.

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