High-efficiency alternating-current electric dynamometer

Abstract

The utility model discloses a high-efficiency AC electric dynamometer, which comprises a dynamometer body, the dynamometer body is composed of a three-phase asynchronous AC motor, a torque rotating speed sensor and a base, the three-phase asynchronous AC motor is installed on the upper end face of the base, and the torque rotating speed sensor is installed on an output shaft of the three-phase asynchronous AC motor. When the dynamometer is used, heat in the three-phase asynchronous alternating current motor is dissipated through the heat-conducting plate via the heat-dissipating fins, and when the dynamometer body works, the three-phase asynchronous alternating current motor in the dynamometer body drives the fan blades on the rotating shaft to rotate through the belt pulley I and the belt pulley II, so that the fan blades are driven to rotate. According to the dynamometer provided by the utility model, the air flow generated when the fan blades work blows among the heat dissipation fins, the heat dissipation effect of the heat dissipation fins can be accelerated through blowing of the air flow, dust among the heat dissipation fins can be cleaned, and the efficiency of the dynamometer is improved while the heat dissipation effect of the three-phase asynchronous AC motor in the dynamometer body is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testing equipment, in particular to a high-efficiency AC electric dynamometer. Background Art

[0002] Dynamometer is one of the main test equipments for directly testing various transmission machinery and power machinery. It can be used for input power test of gearbox, fan, water pump and automobile engine, and can also be used for output power test of the above equipment. When testing transmission machinery and power machinery, dynamometer is used as the power consumption device of the tested system, which is not only used to absorb the power output of the tested part, but also can control the dynamometer to change the load and speed of the tested power machinery to achieve the working conditions required for the test, so as to measure the performance indicators of the tested equipment under different working conditions. With the continuous advancement of science and technology, the production process of dynamometer body is becoming more and more sophisticated.

[0003] In the prior art, a Chinese patent with publication number "CN217484465U" discloses a high-efficiency AC power dynamometer. By utilizing a provided lifting assembly, when facing test objects of different heights, the height of the AC power dynamometer can be adjusted according to the use conditions on site, so that the dynamometer can be adapted to the test objects of different heights, thereby improving work efficiency. This solves the problem that when using an AC power dynamometer to test test objects such as three-phase asynchronous AC motors, workers are often required to manually move the AC power dynamometer to make it consistent with the height of the test object due to the different heights of the test object, which is not only time-consuming and labor-intensive, but also inconvenient to use and has relatively low work efficiency.

[0004] However, the existing technology still has major deficiencies, such as:

[0005] The dynamometer body converts the AC power generated by the AC three-phase asynchronous AC motor into DC power through a frequency converter and then inverts it into AC power for grid connection. During this process, the three-phase asynchronous AC motor must operate continuously. The three-phase asynchronous AC motor will generate working heat during long-term operation. This heat needs to be discharged from the inside of the three-phase asynchronous AC motor in a timely manner. Although the existing three-phase asynchronous AC motor has heat dissipation holes, the heat dissipation holes can only dissipate heat in a natural way and cannot quickly dissipate the heat in the three-phase asynchronous AC motor. When the heat in the three-phase asynchronous AC motor cannot be discharged in time, excessive heat will cause damage to the three-phase asynchronous AC motor inside the three-phase asynchronous AC motor, thereby affecting the efficiency of the dynamometer body. Utility Model Content

[0006] The purpose of the utility model is to provide a high-efficiency AC electric dynamometer to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A high-efficiency AC electric dynamometer, comprising a dynamometer body, the dynamometer body consisting of a three-phase asynchronous AC motor, a torque and speed sensor and a base, the three-phase asynchronous AC motor being mounted on the upper end surface of the base, and the torque and speed sensor being mounted on the output shaft of the three-phase asynchronous AC motor;

[0009] A heat conducting plate is installed on the side end surface of the three-phase asynchronous AC motor, and a heat dissipation fin is fixedly installed on the heat conducting plate. An airflow component is installed on the three-phase asynchronous AC motor, and the heat dissipation effect of the heat dissipation fin is accelerated by the airflow component.

[0010] Preferably, the airflow assembly comprises a pulley 1 and two symmetrically arranged positioning plates, the pulley 1 is mounted on the output shaft of the three-phase asynchronous AC motor, the two positioning plates are mounted on the base, a rotating shaft is rotatably mounted between the two positioning plates, and the pulley 2 and the fan blades are fixedly mounted on the rotating shaft;

[0011] The pulley 1 is driven by a transmission belt and a pulley 2, and driven by the three-phase asynchronous AC motor, thereby driving the fan blades to rotate through the pulley 1 and the pulley 2.

[0012] Preferably, a water cooling assembly is provided on the positioning plate, and the water cooling assembly includes a reciprocating assembly and a water tank, a water pump is fixedly installed in the water tank, the output end of the water pump is connected to a telescopic hose, the end of the telescopic hose away from the water pump is connected to a through pipe, the end of the through pipe away from the telescopic hose is installed with a diversion pipe, and a nozzle is installed on the diversion pipe.

[0013] Preferably, the reciprocating component includes a reciprocating thread, the reciprocating thread is arranged on a rotating shaft, a moving block is movably mounted on the reciprocating thread, a crescent pin is movably mounted on the moving block, and a mounting groove is provided on the moving block for facilitating the installation of the shunt pipe.

[0014] Preferably, a limiting slide bar is fixedly mounted on the lower end surface of the moving block, and a limiting slide groove used in conjunction with the limiting slide bar is provided on the upper end surface of the base.

[0015] Preferably, there are multiple nozzles and they are evenly distributed.

[0016] Preferably, the fan blades are located on the side of the three-phase asynchronous AC motor and also on one side of the heat dissipation fins, and the fan blades are not in contact with the three-phase asynchronous AC motor.

[0017] Preferably, a stabilizing block is fixedly mounted on the upper end surface of the base, and a mounting groove for facilitating the installation of the three-phase asynchronous AC motor is provided on the stabilizing block.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. In the utility model, the heat in the three-phase asynchronous AC motor is dissipated through the heat dissipation fins through the heat conduction plate, and when the dynamometer body is working, the three-phase asynchronous AC motor in the dynamometer body will drive the fan blades on the rotating shaft to rotate through the pulleys 1 and 2 in the airflow assembly, and the airflow generated when the fan blades are working will blow between the heat dissipation fins. The blowing of the airflow can not only accelerate the heat dissipation effect of the heat dissipation fins, but also clean the dust between the heat dissipation fins, thereby improving the heat dissipation effect of the three-phase asynchronous AC motor in the dynamometer body and improving the efficiency of the dynamometer;

[0020] 2. In the utility model, the cooling water is introduced into the telescopic hose through the water pump in the water tank, and then into the shunt pipe through the through pipe, and finally sprayed between the heat dissipation fins through the nozzle in the shunt pipe. At the same time, the rotating shaft drives the reciprocating thread on the rotating shaft to rotate while driving the fan blades. The rotation of the reciprocating thread will cause the moving block to reciprocate on the reciprocating thread through the crescent pin. The movement of the moving block will synchronously drive the nozzle on the shunt pipe to adjust its position, which effectively increases the range of cooling sprayed by the nozzle and further improves the heat dissipation effect of the heat dissipation fins. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the utility model is shown in FIG. Figure 1 ;

[0022] Figure 2 The overall structure of the utility model is shown in FIG. Figure 2 ;

[0023] Figure 3 The overall structure of the utility model is shown in FIG. Figure 3 ;

[0024] Figure 4 It is a structural schematic diagram of the water cooling component in the utility model.

[0025] In the figure: 1. three-phase asynchronous AC motor; 2. torque speed sensor; 3. base; 4. heat conduction plate; 5. heat sink fin; 6. pulley 1; 7. positioning plate; 8. rotating shaft; 9. pulley 2; 10. fan blade; 11. water tank; 12. telescopic hose; 13. through pipe; 14. shunt pipe; 15. nozzle; 16. reciprocating thread; 17. moving block; 18. crescent pin; 19. limit slide rod; 20. limit slide groove; 21. stabilizing block. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 , the utility model provides a technical solution:

[0028] Embodiment 1:

[0029] A high-efficiency AC electric dynamometer comprises a dynamometer body, the dynamometer body comprises a three-phase asynchronous AC motor 1, a torque and speed sensor 2 and a base 3, a stabilizing block 21 is fixedly mounted on the upper end surface of the base 3, a mounting groove for facilitating the installation of the three-phase asynchronous AC motor 1 is provided on the stabilizing block 21, the stability of the three-phase asynchronous AC motor 1 on the base 3 is ensured by the mounting groove on the stabilizing block 21, the three-phase asynchronous AC motor 1 is mounted on the upper end surface of the base 3, and the torque and speed sensor 2 is mounted on the output shaft of the three-phase asynchronous AC motor 1;

[0030] A heat conducting plate 4 is installed on the side end surface of the three-phase asynchronous AC motor 1, and the inner side surface of the heat conducting plate 4 is located inside the three-phase asynchronous AC motor 1. The internal heat of the three-phase asynchronous AC motor 1 is quickly dissipated through the efficient heat conduction of the heat conducting plate 4. A heat dissipation fin 5 is fixedly installed on the heat conducting plate 4. An airflow component is installed on the three-phase asynchronous AC motor 1, and the heat dissipation effect of the heat dissipation fin 5 is accelerated by the airflow component.

[0031] The airflow component includes a pulley 1 6 and two symmetrically arranged positioning plates 7, the pulley 1 6 is installed on the output shaft of the three-phase asynchronous AC motor 1, the two positioning plates 7 are installed on the base 3, a rotating shaft 8 is rotatably installed between the two positioning plates 7, a pulley 2 9 and a fan blade 10 are fixedly installed on the rotating shaft 8, the fan blade 10 is located on the side of the three-phase asynchronous AC motor 1, and is also located on one side of the heat dissipation fin 5, and the fan blade 10 does not contact the three-phase asynchronous AC motor 1;

[0032] The pulley 1 6 is driven by a transmission belt and a pulley 2 9 , and driven by the three-phase asynchronous AC motor 1 , thereby driving the fan blades 10 to rotate through the pulley 1 6 and the pulley 2 9 .

[0033] In this embodiment, the heat in the three-phase asynchronous AC motor 1 is dissipated through the heat dissipation fins 5 through the heat conduction plate 4, and when the dynamometer body is working, the three-phase asynchronous AC motor 1 in the dynamometer body will drive the fan blades 10 on the rotating shaft 8 to rotate through the pulley 1 6 and the pulley 2 9 in the airflow assembly. The airflow generated when the fan blades 10 are working will blow between the heat dissipation fins 5. The blowing of the airflow can not only accelerate the heat dissipation effect of the heat dissipation fins 5, but also clean the dust between the heat dissipation fins 5, thereby improving the heat dissipation effect of the three-phase asynchronous AC motor 1 in the dynamometer body and improving the efficiency of the dynamometer.

[0034] Embodiment 2:

[0035] On the basis of the first embodiment, in order to make the heat dissipation effect of the heat dissipation fins 5 better, a water cooling component is used to achieve this effect. A water cooling component is provided on the positioning plate 7. The water cooling component includes a reciprocating component and a water tank 11. A water pump is fixedly installed in the water tank 11. The output end of the water pump is connected to a telescopic hose 12. The end of the telescopic hose 12 away from the water pump is connected to a through pipe 13. The end of the through pipe 13 away from the telescopic hose 12 is installed with a shunt pipe 14. A nozzle 15 is installed on the shunt pipe 14. The number of the nozzles 15 is multiple and evenly distributed.

[0036] The reciprocating assembly includes a reciprocating thread 16, which is arranged on the rotating shaft 8. A moving block 17 is movably installed on the reciprocating thread 16, and a crescent pin 18 is movably installed on the moving block 17. The moving block 17 is provided with an installation groove for facilitating the installation of the shunt pipe 14; a limiting slide rod 19 is fixedly installed on the lower end surface of the moving block 17, and the limited part of the volume is located inside the limiting slide groove 20. The upper end surface of the base 3 is provided with a limiting slide groove 20 used in conjunction with the limiting slide rod 19. The limiting slider slides in the limiting slide groove 20 to limit the movement of the moving block 17, so that the moving effect is better.

[0037] In this embodiment, the cooling water is passed into the telescopic hose 12 through the water pump in the water tank 11, and then passed into the shunt pipe 14 through the through pipe 13, and finally sprayed to between the heat dissipation fins 5 through the nozzle 15 in the shunt pipe 14. At the same time, the rotating shaft 8 drives the reciprocating thread 16 on the rotating shaft 8 to rotate while driving the fan blades 10. The rotation of the reciprocating thread 16 will cause the moving block 17 to reciprocate on the reciprocating thread 16 through the crescent pin 18. The movement of the moving block 17 will synchronously drive the nozzle 15 on the shunt pipe 14 to adjust its position, which effectively increases the range of cooling sprayed by the nozzle 15 and further improves the heat dissipation effect of the heat dissipation fins 5.

[0038] Working principle:

[0039] When in use, the three-phase asynchronous AC motor 1 will drive the torque speed sensor 2. The three-phase asynchronous AC motor 1 will generate heat when working for a long time. The heat in the three-phase asynchronous AC motor 1 will be transferred to the heat dissipation fins 5 through the heat conduction plate 4, and the heat of the three-phase asynchronous AC motor 1 will be dissipated through the heat dissipation fins 5. At the same time, the three-phase asynchronous AC motor 1 will drive the pulley 1 6 to rotate while working, and the pulley 1 6 will drive the pulley 2 9 to rotate through the transmission belt. When the pulley 2 9 rotates, it will drive the rotating shaft 8 to rotate. When the rotating shaft 8 rotates, it will drive the fan blades 10 to rotate. The airflow generated by the fan blades 10 will blow between the heat dissipation fins 5. The blowing of the airflow can not only accelerate the heat dissipation effect of the heat dissipation fins 5, but also clean the dust between the heat dissipation fins 5, thereby improving the heat dissipation effect of the three-phase asynchronous AC motor 1 in the dynamometer body and improving the efficiency of the dynamometer.

[0040] The cold water in the water tank 11 is introduced into the telescopic hose 12 through a water pump, and the cold water in the telescopic hose 12 is passed into the shunt pipe 14 through the through pipe 13. Finally, the cooling water in the shunt pipe 14 is sprayed to between the heat dissipating fins 5 through the nozzle 15 on the shunt pipe 14. At the same time, the rotating shaft 8 drives the reciprocating thread 16 on the rotating shaft 8 to rotate while driving the fan blades 10. The rotation of the reciprocating thread 16 can cause the moving block 17 to reciprocate on the reciprocating thread 16 through the crescent pin 18. The movement of the moving block 17 will synchronously drive the nozzle 15 on the shunt pipe 14 to adjust its position, which effectively increases the cooling range of the nozzle 15 and further improves the heat dissipation effect of the heat dissipating fins 5.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency AC electric dynamometer, comprising a dynamometer body, wherein the dynamometer body is composed of a three-phase asynchronous AC motor (1), a torque and speed sensor (2) and a base (3), Features: The three-phase asynchronous AC motor (1) is mounted on the upper end surface of the base (3), and the torque speed sensor (2) is mounted on the output shaft of the three-phase asynchronous AC motor (1); A heat conducting plate (4) is installed on the side end surface of the three-phase asynchronous AC motor (1), a heat dissipation fin (5) is fixedly installed on the heat conducting plate (4), and an airflow component is installed on the three-phase asynchronous AC motor (1), and the heat dissipation effect of the heat dissipation fin (5) is accelerated by the airflow component.

2. A high efficiency AC electric dynamometer according to claim 1, Features: The airflow assembly comprises a pulley 1 (6) and two symmetrically arranged positioning plates (7), wherein the pulley 1 (6) is mounted on the output shaft of the three-phase asynchronous AC motor (1), the two positioning plates (7) are mounted on the base (3), a rotating shaft (8) is rotatably mounted between the two positioning plates (7), and a pulley 2 (9) and a fan blade (10) are fixedly mounted on the rotating shaft (8); The pulley 1 (6) is driven by a transmission belt and a pulley 2 (9), and driven by the three-phase asynchronous AC motor (1), thereby driving the fan blades (10) to rotate through the pulley 1 (6) and the pulley 2 (9).

3. A high efficiency AC electric dynamometer according to claim 2, Features: The positioning plate (7) is provided with a water cooling assembly, the water cooling assembly comprising a reciprocating assembly and a water tank (11), a water pump is fixedly installed in the water tank (11), the output end of the water pump is connected to a telescopic hose (12), the end of the telescopic hose (12) away from the water pump is connected to a through pipe (13), the end of the through pipe (13) away from the telescopic hose (12) is installed with a shunt pipe (14), and a nozzle (15) is installed on the shunt pipe (14).

4. A high efficiency AC electric dynamometer according to claim 3, Features: The reciprocating assembly comprises a reciprocating thread (16), the reciprocating thread (16) being arranged on a rotating shaft (8), a moving block (17) being movably mounted on the reciprocating thread (16), a crescent pin (18) being movably mounted on the moving block (17), and a mounting through groove for facilitating the mounting of a shunt pipe (14) being provided on the moving block (17).

5. A high efficiency AC electric dynamometer according to claim 4, Features: A limiting slide bar (19) is fixedly mounted on the lower end surface of the moving block (17), and a limiting slide groove (20) for use in conjunction with the limiting slide bar (19) is provided on the upper end surface of the base (3).

6. A high efficiency AC electric dynamometer according to claim 3, Features: The number of the nozzles (15) is multiple and evenly distributed.

7. A high efficiency AC electric dynamometer according to claim 2, Features: The fan blades (10) are located on the side of the three-phase asynchronous AC motor (1) and are also located on one side of the heat dissipation fins (5). The fan blades (10) are not in contact with the three-phase asynchronous AC motor (1).

8. A high efficiency AC electric dynamometer according to claim 1, Features: A stabilizing block (21) is fixedly mounted on the upper end surface of the base (3), and a mounting groove for facilitating the installation of the three-phase asynchronous AC motor (1) is provided on the stabilizing block (21).

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