CN109765486B - Large-scale generator load testing method - Google Patents
Large-scale generator load testing method Download PDFInfo
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- CN109765486B CN109765486B CN201910003473.XA CN201910003473A CN109765486B CN 109765486 B CN109765486 B CN 109765486B CN 201910003473 A CN201910003473 A CN 201910003473A CN 109765486 B CN109765486 B CN 109765486B
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Abstract
The load test method of the large generator, adopt the load test device of the large generator and driving motor to carry on the load test to the test generator; the large generator load testing device comprises a support, a supporting component and a shaft seat component, wherein the shaft seat component is horizontally arranged and fixed on the support, and the supporting component is arranged in the support; the steps of the load test are as follows: placing the test generator on the support assembly, and coaxially fixing a rotor and a stator of the test generator with the shaft seat assembly; fixedly connecting a test generator with the bracket; the driving motor is in transmission connection with the shaft seat assembly; and starting the driving motor, and transmitting power through the shaft seat assembly to drive the rotor of the test generator to rotate so as to carry out load test on the test generator. The invention realizes the load test of the test generator, improves the accuracy and the reliability of the test, can quickly and accurately realize the butt joint of the test generator and the shaft seat assembly, and realizes the load test of the test generators of different models.
Description
Technical Field
The invention relates to a load test method of a large generator, which is used for the load test of the large generator.
Background
At present, the large loading truck for the mine adopts a mode that a driving motor directly drives wheels, and power transmission from a generator to the driving motor is realized by a mode that the generator directly connected with an engine provides electric power. Because of large horsepower, the power of the generator is also large, the power is more than 1000KW, and the maximum weight is 5 tons, so when the performance experiment is carried out on the generator, a series of problems of large, heavy, difficult and the like such as driving, mounting, fixing and the like are involved.
The structure of the generator of the large-scale loading truck is different from that of a common generator, a bearing seat is only designed at the rear end of a rotor of the generator, the end connected with an engine is not provided with the bearing seat, the front end of the rotor of the generator is directly fixed on an output shaft of the engine when a host is installed, and the structure causes great difficulty in testing the generator.
The prior patent documents obtained by searching include:
CN 105547696B discloses an engine front end wheel train test device, which comprises a test board; the test bench comprises a base (8); the test bench further comprises a plurality of belt wheel mounting brackets, and each belt wheel mounting bracket is independently mounted on the base (8) according to the specific distribution position of the front-end gear train of the engine; each belt wheel mounting bracket is correspondingly provided with a load belt wheel in a gear train at the front end of the engine; each load pulley is connected to a corresponding one of the loads.
CN 108132192 a, providing a generator rotor magnetic pole simulation testing device, said generator rotor magnetic pole simulation testing device includes: a first base on which a driving part is mounted; the second base is provided with a measured magnetic pole; and the simulated stator core is arranged on the first base, and the gap value between the simulated stator core and the measured magnetic pole is smaller than or equal to the target air gap value, wherein the measured magnetic pole can rotate relative to the simulated stator core.
CN 109085499A, a linear generator performance testing device, including synchronous excitation rotary motor, crankshaft link mechanism, cylindrical connecting piece, ball-type connecting piece, signal acquisition based on NI system acquisition card, record and analysis host computer, with the power of 15kW, the synchronous excitation rotary motor of 1500 rpm of rated revolution through the crank link mechanism, convert its rotary motion into reciprocating motion. The converted motion form is used for testing the linear generator.
In the prior art, no device or method specially aiming at load testing of the large-sized loading truck generator exists, the load testing of the large-sized loading truck generator needs to effectively transmit the transmission power of an external driving motor to a rotor of the large-sized loading truck generator, the testing accuracy is guaranteed not to be affected by redundant vibration generated by the large-sized loading truck generator in the testing process, and the generators of different models have different appearance sizes, so that the device or method can be suitable for the change of the assembly sizes of the generators of different models caused by appearance sizes, installation and manufacturing errors before the testing.
Disclosure of Invention
The load test method for the large-scale generator provided by the invention realizes the load test of the test generator, avoids the generation of relative vibration among the test generator, the shaft seat assembly and the bracket in the test process, improves the accuracy and reliability of the test, can quickly and accurately realize the butt joint of the test generator and the shaft seat assembly, and realizes the load test of the test generators of different models.
In order to achieve the purpose, the invention adopts the technical scheme that:
the load test method of the large generator is characterized in that a load test device of the large generator and a driving motor are adopted to carry out load test on the test generator; the load testing device of the large generator comprises a bracket, a supporting component and a shaft seat component, wherein the supporting component and the shaft seat component are used for supporting and testing the generator; the steps of carrying out the load test on the test generator are as follows:
firstly, placing a test generator on a support assembly, and coaxially fixing a rotor and a stator of the test generator with a shaft seat assembly;
secondly, fixedly connecting the test generator with the bracket;
thirdly, the driving motor is in transmission connection with the shaft seat assembly;
and fourthly, starting the driving motor, and transmitting power through the shaft seat assembly to drive a rotor of the test generator to rotate so as to carry out load test on the test generator.
Preferably, the shaft seat assembly comprises a transmission shaft, a bearing assembly, a shaft seat and a locking piece, wherein one end of the transmission shaft can be connected with the driving motor, the bearing assembly is sleeved on the transmission shaft in an interference fit manner, the shaft seat can be sleeved on the bearing assembly in a relatively movable manner, the locking piece is used for axially positioning the shaft seat and the bearing assembly, and the shaft seat is fixed on the support; the first step specifically comprises the following steps:
firstly, placing a test generator on a support component; then the transmission shaft is pushed to axially extend towards the direction of the test generator to drive the bearing assembly to axially move, so that one end of the transmission shaft is close to the rotor of the test generator; then adjusting the test generator to be coaxially aligned with the transmission shaft, and coaxially butting the transmission shaft with a rotor of the test generator by using a bolt; pulling the transmission shaft and the bearing assembly to move back, driving the test generator to move axially, enabling the stator of the test generator to be close to the shaft seat, and enabling the stator of the test generator to be coaxially butted with the shaft seat through bolts; and finally, axially positioning the shaft seat and the bearing assembly by using a locking piece.
Preferably, the third step specifically comprises: a transmission output shaft of a driving motor is coaxially connected with one end of a transmission shaft through a coupler, a torque and rotating speed sensor is additionally arranged on the coupler, and the torque and rotating speed sensor is supported through a sensor supporting seat, so that the transmission shaft, the coupler and the transmission output shaft are coaxially aligned.
Preferably, one end of the transmission shaft is coaxially and detachably provided with an inner flange connecting disc, the inner flange connecting disc is coaxially and fixedly connected with a rotor of the test generator through a bolt, one end of the shaft seat is coaxially and detachably provided with an outer flange connecting disc, and the outer flange connecting disc is coaxially and fixedly connected with a stator of the test generator through a bolt;
the bearing assembly comprises two bearings, a shaft sleeve and a sealing end cover, wherein the bearings are in interference fit with the transmission shaft, the shaft sleeve is fixedly matched with the outer ring of the bearing, the sealing end cover is used for sealing the bearings, the two bearings are respectively positioned at two ends of the shaft sleeve, the sealing end cover is fixed on the end face of the shaft sleeve, and the shaft seat can be sleeved on the shaft sleeve in a relatively movable mode and is axially positioned with the shaft sleeve through a locking piece.
Preferably, the inner wall of the shaft sleeve is provided with an annular step surface abutted against the inner end surface of the bearing outer ring, and the transmission shaft is provided with an annular positioning block abutted against the inner end surface of the bearing inner ring;
the transmission shaft is provided with an annular sealing step, and a labyrinth type sealing fit clearance is formed between the annular sealing step and the sealing end cover.
Preferably, the retaining member including fix the locking section of thick bamboo in the axle bed left and right sides with arrange the last compact heap and the lower compact heap in the locking section of thick bamboo in, the locking section of thick bamboo along vertical setting and stretch into to the axle bed in, go up the compact heap and separate the setting along vertical with lower compact heap, and respectively with the outer wall laminating contact of axle sleeve, clamp bolt stretches into in the locking section of thick bamboo and passes the compact heap and with lower compact heap screw-thread fit, screw up locking bolt down, drive the compact heap and compress tightly on the outer wall of axle sleeve with lower compact heap, make axle bed and axle sleeve axial positioning.
Preferably, the supporting component include the base and along vertical elevating system of vertical dress on the base, drive and the supporting platform that goes up and down through vertical elevating system, the supporting platform level set up, elevating system's quantity is two, both ends around the supporting platform distribute, the test generator is arranged in on the supporting platform.
Preferably, elevating system be vertical hydro-cylinder or vertical lead screw extensible member, supporting platform be connected with elevating system's flexible end, supporting platform include with the flexible end of elevating system be connected horizontal bearing platform, arrange in on the horizontal bearing platform and with horizontal bearing platform slip complex horizontal migration platform and fix on the horizontal migration platform with the V type supporting seat of test generator contact, the rotatable placing in V type supporting seat of test generator.
Preferably, horizontal migration platform bottom universal ball support is equipped with, on horizontal bearing platform was arranged in to universal ball support, make horizontal migration platform and horizontal bearing platform cooperation of sliding, the quantity of V type supporting seat is two, fix the both ends at horizontal migration platform, two rotatable runners are equipped with on the V type supporting seat, two runner axial direction parallel arrangement, on the runner was arranged in to the test generator, be equipped with on the support and be used for moving the horizontal migration platform about and carry out spacing limiting plate, supporting component is located between two limiting plates, be equipped with the pulley that sets up with the limiting plate relatively on the V type supporting seat.
Preferably, the left side and the right side of support be equipped with the test generator fixed plate, the test generator fixed plate on open and to establish the even spaced test generator connecting hole of many levels, and open the waist shape regulation hole that is used for adjusting the mounted position of test generator fixed plate on the support on the test generator fixed plate, the test generator fixed plate passes through waist shape regulation hole and bolt and support is fixed.
The invention has the beneficial effects that:
1. in the load testing method of the large-scale generator, the supporting component is used for supporting the testing generator, the shaft seat component is coaxially fixed with the stator and the rotor of the testing generator, the shaft seat component transmits the power of the driving motor to drive the rotor of the testing generator to rotate, and the load testing of the testing generator is realized.
2. The shaft seat assembly is fixed with the support, the test generator, the support and the shaft seat assembly are connected into a whole, the axial connection rigidity of the shaft seat assembly and the test generator can be ensured to the maximum extent, the transmission power is guaranteed to be effectively transmitted to a rotor of the test generator, the relative vibration generated among the test generator, the shaft seat assembly and the support in the test process is avoided, and the test accuracy and reliability are improved.
3. The transmission output shaft of the driving motor is coaxially connected with one end of the transmission shaft through the coupler, the torque and rotating speed sensor is additionally arranged on the coupler, the torque rotating speed power of the test generator is measured, real-time test data are provided for load test of the test generator, the torque and rotating speed sensor is supported through the sensor supporting seat, the transmission shaft, the coupler and the transmission output shaft are enabled to be coaxially aligned, the concentricity between the shaft seat assembly and the coupler is ensured not to be affected, and the reliability and accuracy of the test are improved.
4. The shaft seat assembly comprises a transmission shaft, a bearing assembly, a shaft seat and a locking piece, the shaft seat can be sleeved on the bearing assembly in a relatively movable mode, the transmission shaft and the bearing assembly can move axially, the rotor and the stator of the test generator can be in butt joint with the shaft seat assembly respectively, the shaft seat and the bearing assembly can be axially positioned through locking of the locking piece after butt joint, and the butt joint of the test generator and the shaft seat assembly can be quickly and conveniently realized through the structural design of the shaft seat assembly.
5. The supporting component comprises a vertical lifting mechanism and a supporting platform, the supporting platform comprises a horizontal bearing platform, a horizontal moving platform and a V-shaped supporting seat, the height and the levelness of the test generator are adjusted through the lifting mechanism, the axial position of the test generator is adjusted through the horizontal moving platform, the horizontal position of the test generator is adjusted through the universal ball support of the bottom of the horizontal moving platform, the circumferential rotation of the test generator is realized through a rotating wheel on the V-shaped supporting seat, when the coaxial connection of the test generator and a bearing assembly is ensured, the connection screw holes in a rotor and a stator of the test generator can be accurately aligned with the connection bolts on the shaft seat assembly, and the reliability and the practicability of the testing device are stronger.
6. The left side and the right side of the bracket are provided with a test generator fixing plate, the test generator fixing plate is provided with a plurality of test generator connecting holes which are evenly spaced along the axial direction of a test motor, the test generator is convenient to be fixedly connected with the bracket after the axial position of the test generator is adjusted, the test generator fixing plate is provided with a waist-shaped adjusting hole, the mounting position of the test generator fixing plate on the bracket is adjusted by the waist-shaped adjusting hole, so that the spacing distance between the test generator fixing plates on the left side and the right side of the bracket is adjusted to be suitable for the fixation of test generators with different diameters and the bracket, one end of a transmission shaft is connected with a rotor of the test generator through a detachable inner flange connecting plate, one end of a shaft seat is connected with a stator of the test generator through a detachable outer flange connecting plate, the butt joint of, therefore, load testing of testing generators of different models is realized, and the universality and the practicability of the large-scale generator load testing device are improved.
Drawings
Fig. 1 is an assembly schematic diagram of a test generator, a large generator load test apparatus and a drive motor.
Fig. 2 is a schematic structural diagram of a large generator load testing apparatus for testing the installation of a generator in an embodiment.
FIG. 3 is a schematic structural diagram of a large generator load testing device in an embodiment
FIG. 4 is a side cross-sectional view of the axle seat assembly.
FIG. 5 is a front cross-sectional view of the shaft seat assembly.
FIG. 6 is a schematic view of the rotor of the test generator coaxially fixedly connected with the inner flange connecting disc of the transmission shaft.
Detailed Description
The following describes an embodiment of the present invention in detail with reference to fig. 1 to 6.
The load test method of the large generator is characterized in that a load test device of the large generator and a driving motor 200 are adopted to carry out the load test on a test generator 100; the large generator load testing device comprises a support 1, a supporting component 2 and a shaft seat component 3, wherein the supporting component 2 and the shaft seat component 3 are used for supporting a testing generator 100, the shaft seat component 3 is horizontally arranged and fixed on the support 1, and the supporting component 2 is arranged in the support 1; the steps of performing a load test on the test generator 100 are:
firstly, placing a test generator 100 on a support component 2, and coaxially fixing a rotor and a stator of the test generator 100 with a shaft seat component 3;
secondly, fixedly connecting the test generator 100 with the bracket 1;
thirdly, the driving motor 200 is in transmission connection with the shaft seat assembly 3;
fourthly, the driving motor 200 is started, and the rotor of the test generator 100 is driven to rotate by the power transmitted by the shaft seat assembly 3, so as to carry out load test on the test generator.
As shown in the figure, the supporting component 2 supports the test generator 100, the shaft seat component 3 is coaxially fixed with the stator and the rotor of the test generator 100, the shaft seat component 3 transmits the power of the driving motor 200 to drive the rotor of the test generator to rotate, and the load test of the test generator is realized. The shaft seat assembly 3 is fixed with the support 1, the test generator 100, the support 1 and the shaft seat assembly 3 are connected into a whole, the axial connection rigidity of the shaft seat assembly 30 and the test generator 100 can be ensured to the maximum extent, the transmission power is effectively transmitted to a rotor of the test generator 100, the relative vibration among the test generator, the shaft seat assembly and the support in the test process is avoided, and the test accuracy and reliability are improved.
The shaft seat assembly 3 comprises a transmission shaft 31, a bearing assembly 32, a shaft seat 33 and a locking piece 34, wherein one end of the transmission shaft 31 can be connected with a driving motor, the bearing assembly 32 is sleeved on the transmission shaft 31 in an interference fit manner, the shaft seat 33 can be sleeved on the bearing assembly 32 in a relatively movable manner, the locking piece 34 is used for axially positioning the shaft seat 33 and the bearing assembly 32, and the shaft seat 33 is fixed on the support 1; the first step specifically comprises the following steps: first, the test generator 100 is placed on the support assembly 2; then, the transmission shaft 31 is pushed to axially extend towards the test generator 100 to drive the bearing assembly 32 to axially move, so that one end of the transmission shaft 31 is close to the rotor of the test generator 100; then adjusting the test generator 100 to be coaxially aligned with the transmission shaft 31, and coaxially butting the transmission shaft 31 with the rotor of the test generator 100 by using a bolt; then, pulling the transmission shaft 31 and the bearing assembly 32 to move back, and driving the test generator 100 to move axially, so that the stator of the test generator 100 is close to the shaft seat 33, and the stator of the test generator 100 is coaxially butted with the shaft seat 33 by using bolts; finally, the shaft seat 33 and bearing assembly 32 are axially positioned by a retaining member 34.
Because the stator and the rotor in the test motor are coaxially arranged, and the stator is positioned in the outer ring of the rotor, the transmission shaft 31 and the rotor of the test motor and the shaft seat 33 and the stator of the test generator 100 can not be simultaneously connected, in order to realize the butt joint of the transmission shaft 31 and the rotor of the test motor, the shaft seat and the bearing assembly 32 are designed to be axially movable, the transmission shaft 31 and the bearing assembly 32 extend forwards to be close to and butt joint with the rotor of the test generator during the butt joint, then the transmission shaft 31 and the bearing assembly 32 move back, the test generator shaft is pulled to move, so that the stator of the test generator and the shaft seat 33 are close to and butt joint with each other, and the shaft seat 33 and the bearing assembly 32 are axially positioned by using the locking piece 34 after the butt. The butt joint of the generator and the shaft seat assembly can be quickly and conveniently tested by the structural design of the shaft seat assembly.
Wherein, the third step specifically comprises: a transmission output shaft 201 of a driving motor 200 is coaxially connected with one end of a transmission shaft 31 through a coupler 300, a torque and rotating speed sensor 400 is additionally arranged on the coupler 300, and the torque and rotating speed sensor 400 is supported through a sensor supporting seat 500, so that the transmission shaft 31, the coupler 300 and the transmission output shaft 201 are kept coaxially aligned. As shown in fig. 1, a transmission output shaft 201 of a driving motor 200 is coaxially connected with one end of a transmission shaft 31 through a coupling 300, a torque and rotation speed sensor 400 is additionally installed on the coupling 300 to measure the torque and rotation speed power of a test generator, so as to provide real-time test data for the load test of the test generator, and the torque and rotation speed sensor 400 is supported through a sensor support seat 500, so that the transmission shaft, the coupling and the transmission output shaft are coaxially aligned, the concentricity between a shaft seat assembly 3 and the coupling 300 is ensured not to be influenced by the gravity of the torque and rotation speed sensor 400, and the reliability and accuracy of the test are improved.
One end of the transmission shaft 31 is coaxially and detachably provided with an inner flange connecting disc 31.1, the inner flange connecting disc 31.1 is coaxially and fixedly connected with a rotor of the test generator 100 through a bolt, one end of the shaft seat 33 is coaxially and detachably provided with an outer flange connecting disc 33.1, and the outer flange connecting disc 33.1 is coaxially and fixedly connected with a stator of the test generator 100 through a bolt; it can be seen from the drawing that the inner flange connecting disc 31.1 is arranged at the rear side of the outer flange connecting disc 33.1, in order to facilitate the smooth connection of the inner flange connecting disc 31.1 and the rotor of the test generator, the transmission shaft 31 is pushed to extend towards the direction of the test generator, so that the inner flange connecting disc 31.1 extends out of the outer flange connecting disc 33.1 to be close to the rotor of the test generator, as shown in fig. 6, the bolts on the inner flange connecting disc 31.1 are butted with the connecting holes on the rotor of the test generator through manual tightening.
The bearing assembly 32 comprises a bearing 32.1 in interference fit with the transmission shaft 31, a shaft sleeve 32.2 fixedly matched with the outer ring of the bearing 32.1 and two sealing end covers 32.3 used for sealing the bearing 32.1, the two bearings 32.1 are respectively positioned at two ends of the shaft sleeve 32.2, the sealing end covers 32.1 are fixed on the end surface of the shaft sleeve 32.2, and a shaft seat 33 can be sleeved on the shaft sleeve 32.2 in a relatively movable manner and is axially positioned with the shaft sleeve 32.2 through a locking piece 34. The shaft sleeve 32.2 plays a role of a bearing seat and is used for accommodating the bearing 32.1, the two bearings 32.1 support the shaft sleeve 32.2, the levelness of the shaft sleeve 32.2 is guaranteed, the sealing end cover 32.1 seals the bearing, and impurities are prevented from entering the bearing to influence the rotation sensitivity of the bearing.
The inner wall of the shaft sleeve 32.2 is provided with an annular step surface 32.21 abutted against the inner end surface of the outer ring of the bearing 32.2, and the transmission shaft 31 is provided with an annular positioning block 31.2 abutted against the inner end surface of the inner ring of the bearing 32.2; the bearing 32.1 is effectively axially positioned through the annular step surface 32.1 and the annular positioning block 31.2, so that the bearing 32.1 and the transmission shaft 31 are prevented from axially moving relatively, and the structural stability and reliability of the shaft seat assembly are improved.
The transmission shaft 31 is provided with an annular sealing step 31.3, and a matching clearance of labyrinth seal is formed between the annular sealing step 31.3 and the sealing end cover 32.1. Through the sealing fit of the annular sealing step 31.3 and the sealing end cover 32.1, the structural stability and the sealing reliability of the installation of the sealing end cover are improved.
The locking part 34 comprises a locking barrel 34.1 fixed on the left side and the right side of the shaft seat 33, an upper pressing block 34.2 and a lower pressing block 34.3 arranged in the locking barrel 34.1, the locking barrel 34.1 is vertically arranged and extends into the shaft seat 33, the upper pressing block 34.2 and the lower pressing block 34.3 are vertically arranged in a separated mode and are respectively in fit contact with the outer wall of the shaft sleeve 32.2, a pressing bolt 34.4 extends into the locking barrel 34.1, penetrates through the upper pressing block 34.2 and is in threaded fit with the lower pressing block 34.3, the locking bolt 34.4 is screwed downwards, the upper pressing block 34.2 and the lower pressing block 34.3 are driven to be pressed on the outer wall of the shaft sleeve 32.2, the shaft seat 33 and the shaft sleeve 32.2 are axially positioned, and the shaft sleeve 32.2 and the shaft seat 33 are conveniently, simply and conveniently detached.
Wherein, supporting component 2 include base 21 and follow vertical elevating system 22 of vertical dress on base 21, drive and the supporting platform 23 that goes up and down through vertical elevating system 22, supporting platform 23 level set up, elevating system 22's quantity is two, distributes at supporting platform 23 front and back both ends, test generator 100 arranges in on supporting platform 23.
The lifting mechanism 22 is a vertical oil cylinder or a vertical screw rod telescopic piece, the supporting platform 23 is connected with the telescopic end of the lifting mechanism 22, the supporting platform 23 comprises a horizontal bearing platform 23.1 connected with the telescopic end of the lifting mechanism 22, a horizontal moving platform 23.2 arranged on the horizontal bearing platform 23.1 and matched with the horizontal bearing platform 23.1 in a sliding manner, and a V-shaped supporting seat 23.3 fixed on the horizontal moving platform 23.2 and contacted with the test generator 100, and the test generator 100 can be rotatably arranged on the V-shaped supporting seat 23.3.
The bottom of the horizontal moving platform 23.2 is provided with universal ball supports 23.4, the universal ball supports 23.4 are arranged on the horizontal bearing platform 23.1, so that the horizontal moving platform 23.2 is in sliding fit with the horizontal bearing platform 23.1, the number of the V-shaped supporting seats 23.3 is two, the two universal ball supports are fixed at two ends of the horizontal moving platform 23.2, the V-shaped supporting seats 23.3 are provided with two rotatable rotating wheels 23.5, the two rotating wheels 23.5 are axially arranged in parallel, the test generator 100 is arranged on the rotating wheels 23.5, the bracket 1 is provided with limiting plates 11 for limiting the left and right movement of the horizontal moving platform 23.2, the supporting component 2 is positioned between the two limiting plates 11, the V-shaped supporting seats 23.2 are provided with pulleys 23.6 which are arranged opposite to the limiting plates 11, the pulleys 23.6 are in contact with the limiting plates 11 and slide on the limiting plates 11 along with the axial movement of the test generator, the friction force in the moving process of the horizontal moving platform 23.3 can be effectively reduced, the horizontal displacement prevention table 23.3 is prevented from moving over the limit and interfering with the support.
As shown in fig. 3, the height and the levelness of the test generator are adjusted by the lifting mechanism 22, the axial position of the test generator is adjusted by the horizontal moving platform 23.2, the horizontal position of the test generator is adjusted by the universal ball support 23.4 at the bottom of the horizontal moving platform, the circumferential rotation of the test generator is realized by the rotating wheel 23.5 on the V-shaped support seat 23.3, when the coaxial connection of the test generator and the bearing assembly is ensured, the connection screw holes on the rotor and the stator of the test generator can be accurately aligned with the connection bolts on the shaft seat assembly, and the reliability and the practicability of the test device are stronger.
The testing generator fixing plate 12 is arranged on the left side and the right side of the support 1, a plurality of testing generator connecting holes 12.1 which are arranged horizontally and evenly at intervals are formed in the testing generator fixing plate 12, a waist-shaped adjusting hole 12.2 used for adjusting the mounting position of the testing generator fixing plate 12 on the support 1 is formed in the testing generator fixing plate 12, and the testing generator fixing plate 12 is fixed with the support 1 through the waist-shaped adjusting hole 12.2 and a bolt. As shown in the figure, a plurality of test generator connecting holes 12.1 which are evenly spaced along the axial direction of a test motor are formed in a test generator fixing plate 12, the test generator is conveniently and fixedly connected with a support 1 after the axial position of the test generator is adjusted, waist-shaped adjusting holes 12.2 are formed in the test generator fixing plate 12, the mounting position of the test generator fixing plate 12 on the support 1 is adjusted through the waist-shaped adjusting holes 12.2, therefore, the spacing distance between the test generator fixing plates 12 on the left side and the right side of the support is adjusted to be suitable for fixing the test generators with different diameters on the support, one end of a transmission shaft 31 is connected with a rotor of the test generator through a detachable inner flange connecting plate 31.1, one end of a shaft seat 33 is connected with a stator of the test generator through a detachable outer flange connecting plate 33.1, and the butt joint of the test generators with shaft seat assemblies with different diameters can be, therefore, the load test of the test generators of different models is realized, and the universality and the practicability of the test device are improved.
The technical solutions of the embodiments of the present invention are fully described above with reference to the accompanying drawings, and it should be noted that the described embodiments are only some embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Claims (9)
1. The large generator load test method is characterized in that a large generator load test device and a driving motor (200) are adopted to carry out load test on a test generator (100); the large generator load testing device comprises a support (1), a supporting component (2) and a shaft seat component (3), wherein the supporting component (2) and the shaft seat component (3) are used for supporting a testing generator (100), the shaft seat component (3) is horizontally arranged and fixed on the support (1), and the supporting component (2) is arranged in the support (1); the steps of performing a load test on a test generator (100) are:
firstly, placing a test generator (100) on a support component (2), and coaxially fixing a rotor and a stator of the test generator (100) with a shaft seat component (3);
secondly, fixedly connecting a test generator (100) with the bracket (1);
thirdly, the driving motor (200) is in transmission connection with the shaft seat assembly (3);
fourthly, starting the driving motor (200), and transmitting power through the shaft seat assembly (3) to drive a rotor of the test generator (100) to rotate so as to carry out load test on the test generator;
the shaft seat assembly (3) comprises a transmission shaft (31) with one end capable of being connected with a driving motor, a bearing assembly (32) sleeved on the transmission shaft (31) in an interference fit manner, a shaft seat (33) sleeved on the bearing assembly (32) and capable of moving relatively, and a locking piece (34) used for axially positioning the shaft seat (33) and the bearing assembly (32), wherein the shaft seat (33) is fixed on the support (1); the first step specifically comprises the following steps:
firstly, placing a test generator (100) on a support component (2); then, the transmission shaft (31) is pushed to axially extend towards the direction of the test generator (100) to drive the bearing assembly (32) to axially move, so that one end of the transmission shaft (31) is close to a rotor of the test generator (100); then adjusting the test generator (100) to be coaxially aligned with the transmission shaft (31), and coaxially butting the transmission shaft (31) with the rotor of the test generator (100) by using bolts; then pulling the transmission shaft (31) and the bearing assembly (32) to move back, driving the test generator (100) to move axially, enabling the stator of the test generator (100) to be close to the shaft seat (33), and enabling the stator of the test generator (100) to be in coaxial butt joint with the shaft seat (33) through bolts; finally, the shaft seat (33) and the bearing assembly (32) are axially positioned by a locking piece (34).
2. The load testing method for the large-scale generator according to claim 1, wherein the third step specifically comprises: a transmission output shaft (201) of a driving motor (200) is coaxially connected with one end of a transmission shaft (31) through a coupler (300), a torque and rotating speed sensor (400) is additionally arranged on the coupler (300), and the torque and rotating speed sensor (400) is supported through a sensor supporting seat (500), so that the transmission shaft (31), the coupler (300) and the transmission output shaft (201) are kept coaxially aligned.
3. The load testing method of the large-scale generator according to claim 1, characterized in that one end of the transmission shaft (31) is coaxially and detachably provided with an inner flange connection disc (31.1), the inner flange connection disc (31.1) is coaxially and fixedly connected with the rotor of the test generator (100) through bolts, one end of the shaft seat (33) is coaxially and detachably provided with an outer flange connection disc (33.1), and the outer flange connection disc (33.1) is coaxially and fixedly connected with the stator of the test generator (100) through bolts;
the bearing assembly (32) comprises a bearing (32.1) in interference fit with a transmission shaft (31), a shaft sleeve (32.2) fixedly matched with the outer ring of the bearing (32.1) and a sealing end cover (32.3) used for sealing the bearing (32.1), the number of the bearings (32.1) is two, the two bearings are respectively positioned at two ends of the shaft sleeve (32.2), the sealing end cover (32.1) is fixed on the end surface of the shaft sleeve (32.2), and the shaft seat (33) can be movably sleeved on the shaft sleeve (32.2) relatively and is axially positioned with the shaft sleeve (32.2) through a locking piece (34).
4. The large generator load testing method according to claim 3, characterized in that the inner wall of the shaft sleeve (32.2) is provided with an annular step surface (32.21) abutting against the inner end surface of the outer ring of the bearing (32.2), the transmission shaft (31) is provided with an annular positioning block (31.2) abutting against the inner end surface of the inner ring of the bearing (32.2);
the transmission shaft (31) is provided with an annular sealing step (31.3), and a labyrinth sealing fit clearance is formed between the annular sealing step (31.3) and the sealing end cover (32.1).
5. The load testing method of the large-scale generator according to claim 3, characterized in that the locking members (34) comprise locking cylinders (34.1) fixed on the left and right sides of the shaft seat (33) and upper compression blocks (34.2) and lower compression blocks (34.3) arranged in the locking cylinders (34.1), the locking cylinders (34.1) are vertically arranged and extend into the shaft seat (33), the upper compression blocks (34.2) and the lower compression blocks (34.3) are vertically arranged in a spaced manner and are respectively in contact with the outer wall of the shaft sleeve (32.2), the compression bolts (34.4) extend into the locking cylinders (34.1) and penetrate through the upper compression blocks (34.2) and are in threaded fit with the lower compression blocks (34.3), the locking bolts (34.4) are screwed downwards, and the upper compression blocks (34.2) and the lower compression blocks (34.3) are driven to be compressed on the outer wall of the shaft sleeve (32.2), so that the shaft seat (33) and the shaft sleeve (32.2) are axially positioned.
6. The load testing method of the large-scale generator according to claim 1, wherein the supporting assembly (2) comprises a base (21), a vertical lifting mechanism (22) vertically mounted on the base (21), and a supporting platform (23) driven by the vertical lifting mechanism (22) to lift, the supporting platform (23) is horizontally arranged, the two lifting mechanisms (22) are distributed at the front end and the rear end of the supporting platform (23), and the test generator (100) is arranged on the supporting platform (23).
7. The load testing method of the large-scale generator according to claim 6, wherein the lifting mechanism (22) is a vertical cylinder or a vertical screw rod expansion piece, the supporting platform (23) is connected with the expansion end of the lifting mechanism (22), the supporting platform (23) comprises a horizontal bearing platform (23.1) connected with the expansion end of the lifting mechanism (22), a horizontal moving platform (23.2) which is arranged on the horizontal bearing platform (23.1) and is in sliding fit with the horizontal bearing platform (23.1), and a V-shaped supporting seat (23.3) which is fixed on the horizontal moving platform (23.2) and is in contact with the test generator (100), and the test generator (100) is rotatably arranged on the V-shaped supporting seat (23.3).
8. The load testing method of the large-scale generator according to claim 7, characterized in that universal ball supports (23.4) are arranged at the bottom of the horizontal moving platform (23.2), the universal ball supports (23.4) are arranged on the horizontal bearing platform (23.1) to enable the horizontal moving platform (23.2) to be in sliding fit with the horizontal bearing platform (23.1), the number of the V-shaped supporting seats (23.3) is two, the two V-shaped supporting seats are fixed at two ends of the horizontal moving platform (23.2), the two rotatable rotating wheels (23.5) are arranged on the V-shaped supporting seat (23.3), the two rotating wheels (23.5) are axially arranged in parallel, the test generator (100) is arranged on the rotating wheels (23.5), limiting plates (11) for limiting the left and right movement of the horizontal moving platform (23.2) are arranged on the support (1), the supporting component (2) is arranged between the two limiting plates (11), and pulleys (23.6) opposite to the limiting plates (11) are arranged on the V-shaped supporting seat.
9. The load testing method of the large-scale generator according to claim 1, characterized in that the left and right sides of the bracket (1) are provided with a test generator fixing plate (12), the test generator fixing plate (12) is provided with a plurality of horizontal test generator connecting holes (12.1) which are uniformly spaced, the test generator fixing plate (12) is provided with a waist-shaped adjusting hole (12.2) for adjusting the mounting position of the test generator fixing plate (12) on the bracket (1), and the test generator fixing plate (12) is fixed with the bracket (1) through the waist-shaped adjusting hole (12.2) and a bolt.
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| CN110109014B (en) * | 2019-05-31 | 2024-04-26 | 苏州绿控传动科技股份有限公司 | Comprehensive testing experiment table for rotary transformer |
| CN110389034A (en) * | 2019-08-24 | 2019-10-29 | 精进电动科技（正定）有限公司 | A kind of electromagnetic clutch test fixture |
| CN110605675A (en) * | 2019-09-19 | 2019-12-24 | 江西精骏电控技术有限公司 | Rack frock that commonality is strong |
| CN110645884B (en) * | 2019-10-16 | 2021-01-01 | 陕西航天时代导航设备有限公司 | Method for aligning radial magnetic suspension stator element of gyro accelerometer |
| CN111830294A (en) * | 2020-09-07 | 2020-10-27 | 东风汽车集团有限公司 | Driving motor performance test environment box |
| CN112229554B (en) * | 2020-09-24 | 2021-11-16 | 台州市光中电器制造有限公司 | Dynamometer |
| CN112229555B (en) * | 2020-09-24 | 2021-11-23 | 台州市光中电器制造有限公司 | Novel dynamometer |
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| CN104808140B (en) * | 2015-04-15 | 2018-05-25 | 广州市机电安装有限公司 | A kind of generated power load test device |
| CN105547696B (en) * | 2016-01-28 | 2018-08-10 | 宁波市鄞州德来特技术有限公司 | Motor front-end wheel system test equipment |
| CN106054076B (en) * | 2016-06-29 | 2018-08-21 | 辽宁工业大学 | Generator online testing device and method |
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