Multi-point suspension high-speed dynamometer

Abstract

The utility model discloses a multi-point suspension high-speed dynamometer, and relates to the dynamometer technology. A front support seat and a rear support seat are respectively mounted at two ends of an outer circle of a base of the special motor, 5-11 shaft heads are radially and uniformly distributed in the front support seat and the rear support seat, 5-11 sets of front and rear suspension bearings are respectively assembled on the shaft heads, and outer rings of the front and rear suspension bearings are in radial rolling line contact fit with stop calibers at two ends of the outer circle of the base to form support points. A special motor is horizontally supported and fixed on a specific bedplate plane, so that the special motor is in a suspension state, a tested machine is installed on an external interface of a front end cover of the special motor, a shaft extension of the special motor is connected with a shaft extension of the tested machine through a coupler, and a boss in the middle of the left side of a base of the special motor is connected with an installation interface at one end of a tension sensor. The other end mounting interface of the tension sensor is connected with the left middle part of the platen plane; the structure is compact, vibration is small, noise is low, and reliable operation of the dynamometer at a high speed or an ultra-high speed is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technology of dynamometer, especially a high -speed suspension type dynamometer of dynamometer equipment. BACKGROUND

[0002] The prior art suspension type dynamometer adopts the outer end flange of the front and rear end covers of the special motor as the support point, and uses the front and rear support seats and bearings to horizontally support and install the special motor on the specific platform, and the special motor is in a suspended state, one end of the tension sensor is fastened with the left middle boss of the base of the special motor by screws, and the other end of the tension sensor is fastened with the specific platform plane by screws; the tested motor is positioned and installed on the interface seat by the stopper, and is fastened by bolts, and a set of diaphragm coupling is used to connect the shaft of the special motor and the shaft of the tested motor installed on the interface seat, and the tested motor is horizontally installed on the specific platform; the center height and coaxiality are accurately adjusted, and the adjustment error is determined according to the speed of the dynamometer, and the adjustment error is generally controlled to be less than or equal to 0.06 mm, and after the adjustment is completed, the tested motor is fastened on the specific platform by bolts; one end of the tension sensor is connected and fastened on the left middle boss of the base of the special motor, and the other end of the tension sensor is connected and fastened on the platform plane; finally, the special motor, the cooling fan and the lead wires of the tension sensor are connected with the control system respectively, when the three-phase winding of the motor stator is connected with three-phase symmetrical current, a rotating magnetic field is generated in the stator and rotor air gap, the electric energy obtained by the stator from the alternating current power source is converted and transmitted to the rotor through the magnetic field energy, and then the rotor outputs mechanical energy from the rotating shaft to drive the tested motor to run, at the same time, the stator (including the base) is driven to creep with the rotor, and the torque is transmitted to the tension sensor, at this time, the torque and power of the tested motor are measured according to the output signal of the tension sensor.

[0003] The prior art suspension type dynamometer has the following defects: the prior art suspension type dynamometer adopts the outer end flange of the front and rear end covers of the special motor as the installation position of the suspension bearing, and the length of the rotating shaft of the special motor at the two positions is increased according to the length of the outer end flange of the front and rear end covers, and the rotating shaft of the special motor is too long outside the support point positions of the bearings at the two ends of the special motor, when the dynamometer runs at high speed, the rotating shaft at the two ends has serious deflection, which causes the vibration and noise of the dynamometer to rapidly increase, and the bearings of the special motor are seriously damaged, and the high-speed operation of the dynamometer cannot be met; the running speed of the prior art suspension type dynamometer is affected by the deflection of the rotor, and the dynamometer can basically be used below 5000 r / min. SUMMARY

[0004] The utility model discloses a compact structure's suspension type dynamometer cancels the outer end flange of the front end cover and rear end cover of special motor configured to the existing suspension type dynamometer, utilizes the outer circle both ends of the base of special motor to stop the installation position of front and rear two end suspension bearings, and each adopts the front and rear support seat of 5-11 place shaft head and 5-11 sets of end suspension bearings, and the front and rear inner cover is installed in the specific platform with special motor horizontal support, and is in the suspension state, and there is the test machine interface on the front end cover of special motor, and the test machine is positioned and installed fastening on the external interface of front end cover with the stop, and the shaft extension of special motor is connected with the shaft extension of test machine with the shaft coupling, and one end installation interface of tension sensor is connected fastening on the left middle boss of the base of special motor, and the other end installation interface of tension sensor is connected fastening on the platform plane multi-point suspension high speed dynamometer,

[0005] The utility model discloses a technical scheme: including platform, front and rear support seat, front and rear suspension bearings, front and rear inner cover, tension sensor, special motor, cooling fan, base, front end cover, rear end cover, shaft coupling, test machine, the base of preceding special motor is cylindrical, and the base of special motor is equipped with cooling fan, and the outer circle both ends of base are equipped with front and rear support seat respectively, and the front and rear support seat of preceding is equipped with respectively 5-11 sets of front and rear suspension bearings on the 5-11 place shaft head of distribution, and the outer ring of front and rear suspension bearings is radially rolling line contact with the both ends of base outer circle stop, and the front and rear support seat is positioned and installed with front and rear inner cover respectively with the stop, and the bolt passes through front and rear support seat installation hole and is engaged with front and rear inner cover installation screw hole, and special motor is supported horizontally on the platform plane, and the bolt passes through the bottom foot installation hole of front and rear support seat and is engaged with platform installation screw hole, and makes special motor be in the suspension state, and the external interface of preceding special motor's front end cover is positioned and installed with test machine with the stop, and the bolt passes through test machine installation hole and is engaged with front end cover external interface installation screw hole, and the shaft extension of preceding special motor is connected with the shaft extension of test machine with the shaft coupling, and the left middle boss of preceding special motor's base is connected with one end installation interface of tension sensor, and adopts screw fastening, and the other end installation interface of tension sensor is connected with preceding platform plane left side middle part, and adopts screw fastening,

[0006] When the utility model is used, the lead-in line of special motor and cooling fan and tension sensor is connected with control system respectively, when the three-phase winding of motor stator passes in three-phase symmetrical current, will produce a rotating magnetic field in the stator, rotor air gap, will obtain the electric energy of stator from ac power through magnetic field energy conversion and transfer to rotor, and then the rotor is in the form of mechanical energy from the output of rotation shaft and drives the test machine to run, and the stator (including base) with the peristalsis of rotor, at the same time, transmits the torque to tension sensor, and at this time, according to the output signal of tension sensor, the torque and power of test machine are accurately measured,

[0007] The utility model has:

[0008] 1. Cancel the special motor front and rear end cover outer end flange, using the special motor base outer circle both ends of the stop as the front and rear suspension bearing installation site, using front and rear support seat, front and rear suspension bearing to install the special motor horizontally supported and fastened on the specific platform, and in the suspended state;

[0009] 2. The support point formed by the 5-11 sets of front and rear suspension bearings outer ring respectively assembled on the 5-11 evenly distributed shaft heads in the front and rear support seats respectively assembled on the special motor base outer circle both ends of the stop, instead of the existing suspension dynamometer special motor using front and rear end cover outer end flange, effectively shortens the extension length of the dynamometer rotating shaft both ends, solves the problem that the suspension dynamometer cannot meet the high speed operation due to the extension length of the rotating shaft both ends, so as to realize the reliable operation of the dynamometer at high speed or super high speed;

[0010] 3. Effectively shorten the extension length of the special motor rotating shaft of the suspension dynamometer at the outer end of the front and rear end covers, compact structure, beautiful and generous, small vibration, low noise, safe and reliable operation, convenient maintenance, improve the speed of the dynamometer more than 2 times, prolong the service life by 50%, meet the market demand. BRIEF DESCRIPTION OF DRAWINGS

[0011] The utility model will be further described below in combination with the drawings; Figure 1 It is the sectional structure schematic diagram of the utility model; in the drawing: 1- platform 2- front and rear support seat 3- front and rear suspension bearing 4- front and rear inner cover 5- tension sensor 6- special motor 7- cooling fan 8- base 9- front end cover 10- rear end cover 11- coupling 12- test machine. DETAILED DESCRIPTION

[0012] See Figure 1The test unit includes a platform 1, front and rear support seats 2, front and rear suspension bearings 3, front and rear inner covers 4, a tension sensor 5, a special motor 6, a cooling fan 7, a base 8, a front cover 9, a rear cover 10, a coupling 11, and a test machine 12. The base 8 of the special motor 6 is equipped with a cooling fan 7. The base 8 of the special motor 6 is cylindrical. Front and rear support seats 2 are respectively mounted on the two ends of the outer circle of the base 8. Five to eleven sets of front and rear suspension bearings 3 are respectively mounted on the shaft ends of the aforementioned front and rear support seats 2 at 5-11 evenly distributed locations. The outer rings of the front and rear suspension bearings 3 are in radial rolling contact with the ends of the outer circle of the base 8. The front and rear support seats 2 are respectively positioned by the stops and the front and rear inner covers 4 are mounted. Bolts pass through the front and rear support seats 2 for installation. The hole engages with the mounting screw holes of the front and rear inner covers 4, and the special motor 6 is horizontally supported on the plane of the platform 1. The bolts pass through the mounting holes of the front and rear support seats 2 and engage with the mounting screw holes of the platform 1, so that the special motor 6 is in a suspended state. The front end cover 9 interface of the aforementioned special motor 6 is positioned and installed with the test machine 12 by a stop. The bolts pass through the mounting holes of the test machine 12 and engage with the mounting screw holes of the front end cover 9 interface. The shaft extension of the aforementioned special motor 6 and the shaft extension of the test machine 12 are connected by a coupling 11. The left middle boss of the base 8 of the aforementioned special motor 6 is connected to one end of the mounting interface of the tension sensor 5 and is fastened with screws. The other end of the mounting interface of the tension sensor 5 is connected to the left middle of the aforementioned platform 1 plane and is fastened with screws.

[0013] The special motor 6 of this utility model adopts a special high-speed permanent magnet synchronous motor, the cooling fan 7 adopts an FLJ series centrifugal fan, the tension sensor 5 adopts an H3 type tension sensor, and the front and rear suspension bearings 3 each adopt 5-11 sets of deep groove ball bearings, whose inner diameters are respectively slidably fitted with the shaft ends of 5-11 evenly distributed on the front and rear support seats. The outer rings of each of the 5-11 sets of front and rear suspension bearings 3 are respectively slidably fitted and contacted with the stop at both ends of the outer circle of the base 8 of the special motor 6.

Claims

1. A multi-point suspended high-speed dynamometer, comprising a platform (1), front and rear support seats (2), front and rear suspension bearings (3), front and rear inner covers (4), a tension sensor (5), a special motor (6), a cooling fan (7), a base (8), a front cover (9), a rear cover (10), a coupling (11), and a test machine (12), wherein the cooling fan (7) is mounted on the base (8) of the aforementioned special motor (6), characterized in that... The base (8) of the special motor (6) is cylindrical, and the outer circle of the base (8) is provided with front and rear support seats (2) at both ends. The front and rear support seats (2) are provided with 5-11 sets of front and rear suspension bearings (3) at 5-11 equidistant shaft heads, respectively. The outer ring of the front and rear suspension bearings (3) is in radial rolling line contact with the outer circle of the base (8) at both ends. The front and rear support seats (2) are respectively provided with front and rear inner covers (4) positioned by the stop. Bolts pass through the mounting holes of the front and rear support seats (2) and engage with the mounting screw holes of the front and rear inner covers (4) to horizontally support the special motor (6) on the plane of the table plate (1). The bolts pass through the mounting holes of the bottom feet of the front and rear support seats (2) and engage with the mounting screw holes of the table plate (1) to make the special motor (6) in a suspended state. The front end cover (9) of the special motor (6) is provided with a test machine (12) positioned by the interface. Bolts pass through the mounting holes of the test machine (12) and engage with the mounting screw holes of the front end cover (9) interface. The shaft extension of the special motor (6) is connected with the shaft extension of the test machine (12) by a coupling (11). The left middle boss of the base (8) of the special motor (6) is connected with one end of the tension sensor (5) by the installation interface, and is fastened by screws. The other end of the tension sensor (5) is connected with the left middle part of the plane of the table plate (1) by the installation interface, and is fastened by screws.

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