Generator test bench

Abstract

The utility model provides a generator test bench, comprising a test bench rack, a motor support arranged on the bench surface of the test bench rack, a test machine arranged on the motor support, a jacking element arranged on the bench surface of the test bench rack, a jacking plate arranged on a push rod of the jacking element, a support frame arranged on the jacking plate, and a support plate arranged above the support frame. The supporting plate is connected with the supporting frame through an up-down position adjusting mechanism, the top face of the supporting plate is horizontal, a sliding rail is arranged in the direction perpendicular to a testing machine spindle and slidably connected with a fixing plate, the supporting plate is provided with a fixing mechanism for fixing the position of the fixing plate, and a generator to be tested is fixed to the fixing plate. The structure is stable, the fixed plate can stably support the to-be-tested generator for a long time, and normal testing of the to-be-tested generator is guaranteed.

Description

Technical Field

[0001] The utility model belongs to the field of generator testing, in particular to a generator testing bench. Background Art

[0002] After the generator is produced, it needs to be tested on a test bench for factory performance to obtain the various index parameters of the generator.

[0003] The commonly used generator test bench structure is as follows: Figure 4 As shown, the test bench (1) includes a hydraulic push rod (22), the hydraulic push rod (22) is installed with a fixed plate (4), the fixed plate (4) is provided with a bidirectional screw (17), and the threaded sliders configured with different rotation direction threaded parts of the bidirectional screw (17) are respectively provided with a pressure plate (19). During the test, the generator (6) to be tested is placed on the fixed plate (4), and then the bidirectional screw is rotated to fix the generator (6) to be tested through two pressure plates (19), and then the extension length of the hydraulic push rod (22) is adjusted to adjust the height position of the generator (6) to be tested, so that the main shaft of the generator (6) to be tested and the main shaft of the test machine (18) on the test bench are aligned, and then the generator main shaft and the test machine (18) main shaft are connected to test the performance of the generator (6) to be tested. However, in actual use, it is found that the test bench has the following problems:

[0004] Firstly, since the fixing plate is in a suspended support state, the long-term support stability is poor. After long-term use, the fixing plate is prone to tilt, making it difficult to align and connect the generator to be tested and the test machine.

[0005] Secondly, in order to ensure the height position accuracy of generators of different models and sizes and to align and connect them with the testing machine, it is necessary to set a displacement sensor and a proportional valve relative to the hydraulic push rod. The extension and retraction amount of the hydraulic push rod is accurately controlled according to the control system of the displacement sensor and the proportional valve to ensure the height position accuracy of the fixed plate. However, this method leads to an increase in the test cost. Utility Model Content

[0006] In view of this, the utility model aims to provide a generator test bench to improve the support stability of the test bench for the generator to be tested, and to quickly determine the position of the generator so that it can be quickly aligned with the test machine.

[0007] In order to achieve the above object, the technical solution of the utility model is implemented as follows:

[0008] A generator test bench, comprising a test bench frame. One end of the tabletop of the test bench frame is provided with a motor support, and a testing machine is arranged on the motor support. The other end of the tabletop of the test bench frame is provided with a lifting element, and the lifting element is a cylinder or a hydraulic cylinder or an electric push rod. A push rod of the lifting element is provided with a lifting plate, and a support frame is arranged on the lifting plate. A support plate is arranged above the support frame. The support plate is connected to the support frame through an up-and-down position adjustment mechanism. The top surface of the support plate is horizontal and is provided with a slide rail in a direction perpendicular to the main shaft of the testing machine. The slide rail is slidably connected to a fixing plate, and the support plate is provided with a fixing mechanism for fixing the position of the fixing plate. The generator to be tested is fixed to the fixing plate.

[0009] Further, the up-and-down position adjustment mechanism includes a vertical first screw rod and four stud bolts. The first screw rod is threadedly connected to the support frame. A hand wheel is arranged at the lower end of the first screw rod, and the upper end of the first screw rod is installed at the center of the bottom surface of the support plate through a rotary rear support.

[0010] The four stud bolts are arranged on the top surface of the support frame. The support plate is correspondingly provided with four through holes, and the four stud bolts respectively pass through their corresponding through holes. Nuts are arranged on both sides of the support plate for the stud bolts.

[0011] Further, the up-and-down position adjustment mechanism further includes two first guide posts. The two first guide posts are respectively arranged on the support frame. The support plate is correspondingly provided with guide holes for the first guide posts, and the first guide posts pass through the guide holes.

[0012] Further, the fixing mechanism includes a vertical plate respectively arranged on the left and right sides of the generator on the fixing plate, and two fixing blocks are arranged on the support plate corresponding to the two vertical plates. The fixing blocks face the vertical plates. A second screw rod is threadedly connected to each of the two fixing blocks. A hand wheel is arranged at the outer end of the second screw rod, and the inner end of the second screw rod abuts against the vertical plate.

[0013] Further, two second guide posts are vertically arranged upward on the tabletop of the test bench frame. The lifting plate is provided with two guide holes, and the second guide posts pass through the corresponding guide holes.

[0014] Compared with the prior art, the generator test bench of the present utility model has the following advantages:

[0015] (1) The structure of the present utility model is stable. The fixing plate can stably support the generator to be tested for a long time, ensuring the normal progress of the test of the generator to be tested.

[0016] (2) The present utility model omits the setting of a displacement sensor and a proportional valve. The height position of the fixing plate is initially determined by the lifting element, and then the height position of the fixing plate is adjusted through the up-and-down position adjustment mechanism to ensure its height position accuracy, meeting the centering and test requirements of generators and testing machines with different specifications and dimensions.

[0017] (3) In the utility model, the two first guide columns in the upper and lower position adjustment mechanism ensure the linearity of the upper and lower movement of the support plate, so that the support plate is always in a horizontal state, and the support plate is prevented from tilting and causing damage to the studs. Four studs are respectively provided with nuts on both sides of the support plate, and the studs and the support plate are locked and fixed by the nuts, thereby improving the stable internal support of the support plate, thereby ensuring that the fixed plate can stably support the generator to be tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the accompanying drawings:

[0019] Figure 1 This is a front view of a generator test bench according to an embodiment of the utility model;

[0020] Figure 2 A top view of a generator test bench according to an embodiment of the utility model;

[0021] Figure 3 It is a three-dimensional schematic diagram of the fixing plate in this example;

[0022] Figure 4 This is a schematic diagram of the structure of an existing generator test bench.

[0023] Description of reference numerals:

[0024] 1-test bench; 2-motor bracket; 3-support plate; 4-fixing plate; 41-fixing hole; 42-slide groove; 5-slide rail; 6-generator to be tested; 7-second screw; 8-slewing support; 9-first screw; 10-nut; 11-first guide column; 12-stud; 13-support frame; 14-lifting plate; 15-second guide column; 16-lifting element; 17-bidirectional screw; 18-testing machine; 19-pressing plate; 20-vertical plate; 21-fixing block; 22-hydraulic push rod. DETAILED DESCRIPTION

[0025] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0026] like Figure 1 , 2As shown, a generator test bench includes a test bench 1, a motor bracket 2 is provided at one end of the test bench 1 table, a test machine 18 is provided on the motor bracket 2, and a lifting element 16 is provided at the other end of the test bench 1 table. The lifting element 16 is a cylinder or a hydraulic cylinder or an electric push rod, preferably a hydraulic cylinder. The lifting element is installed below the test bench 1 table, and its push rod extends upward from the test bench 1 table. A connecting plate is provided on the push rod, and the top surface of the connecting plate is connected to a fixed lifting plate 14. A support frame 13 is provided on the top surface of the lifting plate 14. The support frame 13 includes a top plate and four pillars, and the top plate is connected and fixed to the lifting plate 14 through the four pillars. A support plate 3 is provided above the support frame 13, and the support plate 3 is connected to the support frame 3 through an up and down position adjustment mechanism. Two slide rails 5 are provided on the top surface of the support plate 3 in a horizontal direction and perpendicular to the main axis of the test machine 18. The slide rail 5 is slidably connected with a fixed plate 4, and the generator 6 to be tested is fixed to the fixed plate 4. The support plate 3 is provided with a fixing mechanism for fixing the position of the fixed plate 4.

[0027] In the present invention, the height position of the fixed plate is determined in two steps: first, the height of the support frame is determined by the stroke of the push rod of the jacking element, that is, the height position of the fixed plate 3 is preliminarily determined, and then the height position of the support plate 3 is adjusted by the up and down position adjustment mechanism to accurately position the support plate 3, that is, the height position of the fixed plate 3, thereby completing the determination of the height position of the fixed plate 3. This adjustment method saves the setting of the displacement sensor and the proportional valve, saving the test cost.

[0028] In the utility model, the up and down position adjustment mechanism includes a first screw rod 9 threadedly connected at the center of the top plate of the support frame 13, and four studs 12 fixedly installed around the top surface of the top plate. A hand wheel is provided at the lower end of the first screw rod 9, and the upper end of the first screw rod 9 is installed at the center of the bottom surface of the support plate 3 through a rotating rear support 8. The first screw rod 9 rotates to drive the support plate 3 to move up and down, so as to adjust the position height of the support plate 3. The four studs 12 are arranged around the first screw rod 9, and the support plate 3 is correspondingly provided with four through holes. The four studs 12 are respectively passed through the corresponding through holes, and the studs 12 are respectively provided with a nut 10 on both sides of the support plate 3. After the height position of the support plate is adjusted appropriately, the studs 12 and the support plate 3 are locked and fixed by the two nuts 10 on the studs 12, so as to improve the support stability of the support plate 3, thereby improving the stability of the fixed plate 4 on the support plate.

[0029] In the utility model, in the process of the support plate 3 moving up and down, in order to prevent the through hole wall and the stud 12 from colliding and damaging the thread, the gap between the stud and the through hole needs to be kept constant, and two first guide posts 11 are also provided on the support frame 13, and the support plate 3 is provided with guide holes corresponding to the first guide posts 11, and the first guide posts 11 pass through the guide holes. This structure guides the support plate 13 to move up and down, ensures the linearity of the support plate 13 to move up and down, prevents the thread of the stud 12 from being bumped, and ensures the threaded connection between the nut 10 and the stud 12.

[0030] In the utility model, the fixing mechanism includes a vertical plate 20 respectively arranged on the left and right sides of the fixing plate 4, and two fixing blocks 21 respectively arranged on the two vertical plates 20 of the supporting plate 3. The fixing blocks 21 and the vertical plates 20 are directly opposite to each other. The two fixing blocks 21 are respectively threadedly connected with a second screw rod 7. The outer end of the second screw rod 7 is provided with a hand wheel, and the inner end of the second screw rod 7 abuts against the vertical plate 20. The position of the fixing plate 4 is fixed by the two second screw rods 7, thereby realizing the fixing of the position of the generator 6 on the fixing plate 4.

[0031] In the present utility model, the structure of the fixing plate 4 is as follows Figure 3 As shown, two vertical plates 20 are installed at the left and right edges of the fixed plate 4. The fixed plate 4 is provided with a plurality of fixing holes 41, which are preferably threaded holes. The bottom surface of the fixed plate 4 is provided with a slide groove 42 corresponding to the slide rail.

[0032] During the factory performance test of the generator, the generator 6 to be tested is installed at the appropriate position of the fixed plate 4, and its axial position meets the connection with the testing machine 18. The left and right position is achieved by moving the fixed plate 4 along the slide rail 5 and adjusting the position of the fixed plate 4. After the left and right position is determined, the position of the fixed plate 4 is locked and fixed by two second screws 7, and then the height of the fixed plate 4 is adjusted up and down to align the generator 6 to be tested and the testing machine 18, and then the main shafts of the two are connected, and the performance test of the generator 6 to be tested can be carried out.

[0033] In the utility model, the test bench 1 has two second guide posts 15 vertically upward, and the lifting plate 14 has two guide holes, and the second guide posts 15 pass through the corresponding guide holes. This structure guides the lifting plate 14 to move up and down, ensuring that the lifting plate 14 always remains horizontal.

[0034] The utility model realizes the supporting stability of the fixed plate for the generator to be tested, and simultaneously the accurate positioning of the height position of the fixed plate is completed in two steps, thus eliminating the need for setting of a displacement sensor and a proportional valve, and saving test costs.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A generator test bench, comprising a test bench (1), wherein one end of the test bench (1) is provided with a motor bracket (2), and the motor bracket (2) is provided with a test machine (18), characterized in that: A lifting element (16) is provided at the other end of the test bench (1) table top. The lifting element (16) is a cylinder, a hydraulic cylinder or an electric push rod. The push rod is provided with a lifting plate (14). A support frame (13) is provided on the lifting plate (14). A support plate (3) is provided above the support frame (13). The support plate (3) is connected to the support frame (13) through an up and down position adjustment mechanism. A slide rail (5) is provided on the top surface of the support plate (3) in a horizontal direction and in a direction perpendicular to the main axis of the test machine (18). The slide rail (5) is slidably connected to a fixed plate (4). The support plate (3) is provided with a fixing mechanism for fixing the position of the fixed plate (4). The generator (6) to be tested is fixed to the fixed plate (4).

2. A generator test bench according to claim 1, characterized in that: The up-down position adjustment mechanism comprises a vertical first screw rod (9) and four studs (12); the first screw rod (9) and the support frame (13) are threadedly connected; a hand wheel is provided at the lower end of the first screw rod (9); and the upper end of the first screw rod (9) is mounted at the center of the bottom surface of the support plate (3) through a rotary rear support (8); The four studs (12) are arranged on the top surface of the support frame (13), and the support plate (3) is correspondingly provided with four through holes. The four studs (12) respectively pass through the corresponding through holes, and nuts (10) are respectively provided on both sides of the studs (12) on the support plate (3).

3. A generator test bench according to claim 2, characterized in that: The up-and-down position adjustment mechanism further comprises two first guide columns (11), the two first guide columns (11) are respectively arranged on the support frame (13), the support plate (3) is provided with guide holes corresponding to the first guide columns (11), and the first guide columns (11) pass through the guide holes.

4. The generator test bench according to claim 1, characterized in that: The fixing mechanism comprises a vertical plate (20) respectively arranged on the left and right sides of the generator (6) of the fixing plate (4), and two fixing blocks (21) arranged on the support plate (3) corresponding to the two vertical plates (20), the fixing blocks (21) and the vertical plates (20) facing each other, the two fixing blocks (21) are respectively threadedly connected to a second screw rod (7), the outer end of the second screw rod (7) is provided with a hand wheel, and the inner end of the second screw rod (7) abuts against the vertical plate (20).

5. The generator test bench according to claim 1, characterized in that: The test bench (1) has two second guide columns (15) arranged vertically upward on its tabletop, and the lifting plate (14) has two guide holes, through which the second guide columns (15) pass.

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