An alternating current starting system for a generator set

Abstract

This utility model discloses an AC starting system for generator sets, belonging to the field of engine technology, which solves the problems of insufficient torque and easy motor overheating in existing generator sets during continuous use. The AC starting system includes a motor power output system, the output end of which meshes with a flywheel ring gear. It also includes an AC starter motor and a belt. The AC starter motor is mounted on one side of the engine, with a drive pulley at its output end and a driven pulley at the power input end of the motor power output system. The drive pulley and driven pulley are connected by a belt drive. The bottom of the AC starter motor has an adjustment device for adjusting the belt tension, including an upper base and a lower base. The AC starter motor is mounted on the upper base. This AC starting system for generator sets can be used continuously for extended periods.

Description

Technical Field

[0001] This utility model relates to the field of engine technology, and more specifically, to an AC starting system for generator sets. Background Technology

[0002] Currently, gas engines are increasingly being used in the field. Biogas, natural gas, associated petroleum gas, coal gas, landfill gas, and alloy exhaust gas, among others, can all be used as gaseous fuels in engines after appropriate gas treatment to generate electricity. Biogas, natural gas, and associated petroleum gas have high calorific value and are easily ignited when mixed with air in a certain proportion, generally making engines easier to start. However, coal gas, landfill gas, and alloy exhaust gas have relatively lower calorific value and are more difficult to ignite, potentially requiring multiple attempts to start the engine.

[0003] In existing generator set starting systems, engine starting is achieved by engaging the output of the generator set's motor power output system (i.e., a 24V DC starter) with the flywheel ring gear on the engine crankshaft, causing the flywheel ring gear to rotate and thus starting the engine. However, existing generator set starting systems have the following drawbacks: ① Repeated starting attempts will cause the starter motor relay to become overheated, preventing heat dissipation and potentially burning out the starter motor; ② The starter motor should not run continuously for more than 5 seconds. If the first start fails, a minimum interval of 2 minutes is required before attempting another start to allow the battery to recover and the starter motor to cool down, which is time-consuming; ③ The starter motor relay is prone to poor contact, requiring frequent inspection, adjustment, or contact resurfacing; ④ Using a 24V DC power supply results in low output power and starting torque, making it difficult to start low-calorific-value gas engines smoothly. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an AC starting system for generator sets that addresses the above-mentioned shortcomings of the existing technology, with high output power and torque, good starting effect, and long-term continuous use.

[0005] The technical solution of this utility model is as follows: an AC starting system for a generator set includes a motor power output system, the output end of which meshes with a flywheel ring gear, an AC starter motor, and a belt. The AC starter motor is mounted on one side of the engine, and its output end has a drive pulley. The power input end of the motor power output system has a driven pulley. The drive pulley and driven pulley are connected by a belt drive. The bottom of the AC starter motor has an adjustment device for adjusting the belt tension. The adjustment device includes an upper base and a lower base. The AC starter motor is mounted on the upper base, and the upper base is slidably mounted on the lower base. An adjustment plate is provided on one side of the top of the lower base. An adjustment rod is movably inserted into the adjustment plate, and one end of the adjustment rod is fixedly connected to the upper base. A locking nut is threaded onto the adjustment rod on the outside of the adjustment plate. The AC starter motor also has a junction box, and the AC starter motor is electrically connected to a 380V AC power supply through the junction box.

[0006] As a further improvement, the lower base is provided with at least one sliding groove, and the bottom of the upper base is provided with a slider, which is slidably installed in the sliding groove.

[0007] Furthermore, the junction box includes a box body and a protective cover. The box body and the protective cover are connected by bolts. The top of the box body is provided with an annular groove. The bottom of the protective cover has a protrusion that is adapted to the annular groove. The protrusion is movably inserted into the annular groove. The bottom of the protrusion is provided with a sealing gasket.

[0008] Furthermore, the top of the annular groove is provided with a conical opening.

[0009] Furthermore, the upper base is detachably provided with a belt guard that covers the drive wheel and the belt.

[0010] Furthermore, both the driving wheel and the driven wheel are provided with at least one groove, and the bottom of the groove is provided with a plurality of first heat dissipation holes arranged at equal intervals. The sidewalls of the driving wheel and the driven wheel are provided with a plurality of through second heat dissipation holes, and the plurality of first heat dissipation holes and the plurality of second heat dissipation holes correspond one-to-one and are connected.

[0011] Furthermore, a rubber pad is provided between the AC starter motor and the upper base.

[0012] Beneficial effects

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This utility model discloses an AC starting system for generator sets. This AC starting system can meet the field application needs of most gas generator sets. The AC starting system adopts 380V AC power supply, with large output power and torque, good starting effect, and can be used continuously for a long time. It effectively solves the shortcomings of insufficient starting torque and easy overheating of motors caused by 24V DC. Furthermore, the starting system is externally arranged and independent of the engine body. Except for the need to mesh with the flywheel ring gear of the engine, it does not occupy the engine's operating space. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a cross-sectional structural diagram of the adjustment device in this utility model;

[0017] Figure 3 This is a cross-sectional structural diagram of the junction box in this utility model;

[0018] Figure 4 This is a cross-sectional structural diagram of the drive wheel in this utility model.

[0019] Among them: 1-AC starter motor, 2-junction box, 3-belt protective cover, 4-belt, 5-motor power output system, 6-rubber pad, 7-adjusting rod, 8-upper base, 9-lower base, 10-mounting bracket, 11-flywheel gear ring, 12-adjusting plate, 13-slide groove, 14-slider, 15-locking nut, 16-drive wheel, 17-driven wheel, 18-first heat dissipation hole, 19-second heat dissipation hole, 20-groove, 21-box body, 22-protective cover, 23-annular groove, 24-protrusion, 25-sealing gasket, 26-conical opening. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0021] See Figure 1-4An AC starting system for a generator set includes a motor power output system 5, which is an existing starter motor and is prior art, therefore it will not be described in detail. The output end of the motor power output system 5 meshes with a flywheel ring gear 11, which is mounted on the crankshaft of the engine. The system also includes an AC starter motor 1 and a belt 4. The AC starter motor 1 is mounted on one side of the engine. The output end of the AC starter motor 1 has a drive pulley 16, and the power input end of the motor power output system 5 has a driven pulley 17. The drive pulley 16 and the driven pulley 17 are connected by the belt 4. The bottom of the AC starter motor 1 has an adjustment device for adjusting the tension of the belt 4. The adjustment device includes an upper base 8 and a lower base 9. The AC starter motor 1 is mounted on the upper base 8, and the upper base 8 is slidably mounted on the lower base 9. The lower base 9 is mounted on the engine set base. An adjustment plate 12 is provided on one side of the top of the lower base 9, and an adjustment rod is movably inserted into the adjustment plate 12. 7. One end of the adjusting rod 7 is fixedly connected to the upper base 8. A locking nut 15 is threaded onto the adjusting rod 7 on the outside of the adjusting plate 12. By loosening the locking nut 15, the adjusting rod 7 is pulled to move the upper base 8 left and right on the lower base 9, thereby adjusting the tension of the belt 4. After adjustment, the locking nut 15 is tightened to prevent the upper base 8 from continuing to slide. The AC starter motor 1 is also equipped with a junction box 2. The AC starter motor 1 is electrically connected to a 380V AC power supply through the junction box 2. The AC starter motor 1 is also connected to a nearby power source through the junction box 2 to provide 380V AC power support to the starting system. The AC starter motor 1 and the motor power output system 5 are both electrically connected to the controller. The controller is also electrically connected to the engine. When the engine is detected to be starting normally, the controller controls the motor power output system 5 to retract, so that the output end of the motor power output system 5 disengages from the flywheel ring gear 11, and then the AC starter motor 1 stops rotating.

[0022] Preferably, a mounting bracket 10 is installed on the motor power output system 5. The motor power output system 5 is mounted on the side of the engine cylinder block via the mounting bracket 10. The mounting bracket 10 is connected to the engine cylinder block by bolts. A rubber pad is provided between the mounting bracket 10 and the engine cylinder block to reduce the impact of vibration generated during engine operation on the motor power output system 5 and to prevent the bolts on the mounting bracket 10 from loosening due to long-term vibration.

[0023] In use, pressing the start button activates the controller, which extends the output of the motor power output system 5 and engages with the flywheel ring gear 11. The controller then starts the AC starter motor 1, thereby driving the motor power output system 5 to start. The motor power output system 5 engages with the flywheel ring gear 11 to drive the engine. Once the engine starts successfully, the output of the motor power output system 5 disengages from the flywheel ring gear 11. This AC starting system can meet the field application needs of most gas generator sets. The AC starting system uses 380V AC power, has high output power and torque, good starting effect, and can be used continuously for a long time. It effectively solves the shortcomings of insufficient starting torque and easy overheating of the motor caused by 24V DC. Furthermore, the starting system is externally mounted, independent of the engine body, and does not occupy engine space except for the need to engage with the engine starting gear.

[0024] In this embodiment, the lower base 9 is provided with at least one sliding groove 13, and the bottom of the upper base 8 is provided with a slider 14. The slider 14 is slidably installed in the sliding groove 13. The cross section of the slider 14 is inverted "T" shape, which guides the sliding of the upper base 8.

[0025] In this embodiment, the junction box 2 includes a box body 21 and a protective cover 22. The box body 21 and the protective cover 22 are connected by bolts. The top of the box body 21 is provided with an annular groove 23. The bottom of the protective cover 22 is provided with a protrusion 24 that is adapted to the annular groove 23. The protrusion 24 is movably inserted into the annular groove 23. The bottom of the protrusion 24 is provided with a sealing gasket 25 to enhance the sealing between the box body 21 and the protective cover 22 and prevent dust or liquid from entering the box body 21 and damaging the circuit of the AC starter motor 1.

[0026] In this embodiment, the top of the annular groove 23 is provided with a tapered opening 26, which facilitates the quick alignment and insertion of the protrusion 24 into the annular groove 23, and facilitates the installation of the protective box 22.

[0027] In this embodiment, the upper base 8 is detachably provided with a belt guard 3 that covers the drive wheel 16 and the belt 4. The belt guard 3 covers the rotating parts such as the belt 4 to prevent the belt from breaking and flying out, providing protection for the operator, and at the same time preventing other objects from flying in during the operation of the AC starting system, which could damage the belt 4.

[0028] Multiple through holes or louvers can be opened on the side of the belt guard 3 to facilitate ventilation and effectively improve the heat dissipation of the belt 4, drive pulley 16, and driven pulley 17 inside the belt guard 3.

[0029] In this embodiment, both the driving pulley 16 and the driven pulley 17 are provided with at least one groove 20. The bottom of the groove 20 is provided with a plurality of first heat dissipation holes 18 arranged at equal intervals. The sidewalls of the driving pulley 16 and the driven pulley 17 are provided with a plurality of through second heat dissipation holes 19. The plurality of first heat dissipation holes 18 correspond one-to-one with the plurality of second heat dissipation holes and are connected. The first heat dissipation holes 18 and the second heat dissipation holes 19 are connected, which can dissipate the heat generated by friction between the belt 4 and the groove 20, thereby reducing the overall temperature of the belt 4, the driving pulley 16 and the driven pulley 17, effectively slowing down the aging rate of the belt 4, and thus improving the service life of the belt 4.

[0030] In this embodiment, a rubber pad 6 is provided between the AC starter motor 1 and the upper base 8, so that the AC starter motor 1 and the upper base 8 have flexible contact, avoiding the vibration generated by the AC starter motor 1 during operation, which may cause the locking nut 15 or the lower bracket 9 to loosen over time.

[0031] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. An alternator starter system for a generator set, comprising a motor power output system (5) whose output is engaged with a flywheel ring gear (11), characterized in that, It also includes an AC starter motor (1) and a belt (4). The AC starter motor (1) is mounted on one side of the engine. The output end of the AC starter motor (1) is provided with a drive pulley (16), and the power input end of the motor power output system (5) is provided with a driven pulley (17). The drive pulley (16) and the driven pulley (17) are connected by a belt (4). The bottom of the AC starter motor (1) is provided with an adjustment device for adjusting the tension of the belt (4). The adjustment device includes an upper base (8) and a lower base (9). The AC starter motor (1) is installed on the upper base (8), which is slidably installed on the lower base (9). The lower base (9) has an adjustment plate (12) on one side of its top. An adjustment rod (7) is movably inserted into the adjustment plate (12). One end of the adjustment rod (7) is fixedly connected to the upper base (8). A locking nut (15) is threaded onto the adjustment rod (7) on the outside of the adjustment plate (12). The AC starter motor (1) is also provided with a junction box (2). The AC starter motor (1) is electrically connected to a 380V AC power supply through the junction box (2).

2. An AC starting system for a genset as defined in claim 1, wherein, The lower base (9) is provided with at least one slide groove (13), and the bottom of the upper base (8) is provided with a slider (14), which is slidably installed in the slide groove (13).

3. An AC starting system for a genset as defined in claim 1, wherein, The junction box (2) includes a box body (21) and a protective cover (22). The box body (21) and the protective cover (22) are connected by bolts. The top of the box body (21) is provided with an annular groove (23). The bottom of the protective cover (22) is provided with a protrusion (24) that is adapted to the annular groove (23). The protrusion (24) is movably inserted into the annular groove (23). The bottom of the protrusion (24) is provided with a sealing gasket (25).

4. An AC starting system for a genset as defined in claim 3, wherein, The top of the annular groove (23) is provided with a conical opening (26).

5. An AC starting system for a genset as defined in claim 1, wherein, The upper base (8) is detachably provided with a belt guard (3) that covers the drive wheel (16) and belt (4).

6. An AC starting system for a genset as defined in claim 1, wherein, The driving wheel (16) and the driven wheel (17) are each provided with at least one groove (20). The bottom of the groove (20) is provided with a plurality of first heat dissipation holes (18) arranged at equal intervals. The side walls of the driving wheel (16) and the driven wheel (17) are provided with a plurality of through second heat dissipation holes (19). The plurality of first heat dissipation holes (18) and the plurality of second heat dissipation holes correspond one-to-one and are connected.

7. An AC starting system for a genset as defined in claim 1, wherein A rubber pad (6) is provided between the AC starter motor (1) and the upper base (8).

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