Centrifugal force tripping test device

Abstract

The centrifugal force tripping testing device comprises a protective outer box, an opening and closing door connected with the protective outer box through a hinge structure is arranged on the protective outer box, a plurality of first observation windows are arranged on the protective outer box, a plurality of second observation windows and locking pieces are arranged on the opening and closing door, and a testing structure is arranged in the protective outer box. With the adoption of the structure, a release dead zone measuring function is realized, and a test result is more accurate; on-line self-diagnosis can be realized by changing the position of the adjusting nut and adjusting the rule between the elastic force value and the action value of the spring; the device is stable in structure, convenient to install, high in equipment integration level, small in occupied area, safe in testing, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of hydroelectric power generation equipment, in particular to a centrifugal force tripping test device. Background Art

[0002] The generator set is usually equipped with an overspeed protection device, which is designed based on mechanical principles. When the generator set speed reaches or exceeds the set speed value, the overspeed protection device will trip and hit the monitoring device. When the monitoring device detects the hit, it will reduce the speed of the unit.

[0003] However, as the equipment is used, the anti-loosening nut may become loose, causing the centrifugal force of the overspeed protection device to change. Therefore, in the existing mechanical overspeed flying pendulum test platform, it is difficult to test because the adjustment degree of the adjusting nut cannot be predicted. In addition, the existing device does not have the function of measuring the dead zone of the release of the overspeed protection device; it does not have the online self-diagnosis function of the regularity between the compression or elongation of the flying pendulum spring and the action value; the protective device is simple and the safety risk is high; the overall integration of the equipment is low and the space occupied is huge. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a centrifugal force release test device, which has a release dead zone measurement function and a more accurate test result; the rule between the spring elastic force value and the action value can be adjusted by changing the position of the adjusting nut, and online self-diagnosis can be performed; the device has a stable structure, is easy to install, has a high degree of equipment integration, occupies a small area, is safe to test, and saves time and effort.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a centrifugal force tripping test device, comprising a protective outer box, the protective outer box is provided with an opening and closing door connected thereto through a hinge structure, the protective outer box is provided with a plurality of first observation windows, the opening and closing door is provided with a plurality of second observation windows and a locking member, and a test structure is provided inside the protective outer box;

[0006] The test structure includes a main support, an electric control box and a hydraulic system are arranged at the bottom of the main support, a first fixing seat is arranged on the main support, a hollow turbine reducer is arranged on the first fixing seat, the hollow turbine reducer is connected to the output end of the first motor through a planetary reducer, the first motor is connected to the main support through a second fixing seat, the output end of the hollow turbine reducer is connected to the rotating platform structure, an adjustable overspeed protection structure and a counterweight are arranged on the rotating platform structure, the main support is connected to the overspeed detection device through a support arm, and the overspeed detection device is connected to the hydraulic system through a pipeline structure;

[0007] The overspeed protection structure includes an installation box, a mounting connecting plate that cooperates with the installation groove is provided at the bottom of the installation box, a connecting arm is provided on the installation box, a proximity switch is provided on the connecting arm, a second motor is provided on the side of the installation box away from the proximity switch, the output end of the second motor is connected to the tightening sleeve through a connecting rod, the tightening sleeve cooperates with the adjusting nut, the adjusting nut cooperates with the adjusting screw thread, the adjusting screw is connected to the overspeed protection sleeve arranged on the side of the installation box close to the proximity switch through a symmetrically arranged limit connecting plate, a flying pendulum is provided in the overspeed protection sleeve, a matching cavity and a symmetrically arranged limit sliding groove that cooperates with the limit connecting plate are provided on the flying pendulum, the flying pendulum is connected to the mounting ring through an elastic member, the elastic member and the mounting ring are outermostly mounted on the adjusting screw, and the mounting ring cooperates with the adjusting nut.

[0008] In a preferred embodiment, the rotating platform structure includes a mounting seat connected to a hollow turbine reducer, the mounting seat is connected to a turntable via a support column, a plurality of reinforcing arms are provided between the turntable and the support column, and a mounting groove is provided on the turntable that cooperates with the overspeed protection structure.

[0009] In a preferred solution, the overspeed detection device is provided with a switching valve switch cooperating with the flying pendulum.

[0010] In a preferred solution, the first observation window and the second observation window are both explosion-proof glass.

[0011] In a preferred solution, a limiting ring is provided on the adjusting nut, and the limiting ring is rotationally matched with a positioning ring groove provided on the mounting ring.

[0012] In a preferred solution, the first motor is a high-precision and high-power servo motor.

[0013] In a preferred solution, the second motor is a small torque motor.

[0014] In a preferred solution, a speed sensor cooperating with the rotating platform structure is provided on the first fixing seat.

[0015] The centrifugal force tripping test device provided by the utility model has the following beneficial effects by adopting the above structure:

[0016] (1) With the function of measuring the dead zone of the trip unit, the test results are more accurate;

[0017] (2) By changing the position of the adjusting nut, the relationship between the spring force value and the action value can be adjusted, and online self-diagnosis can be performed;

[0018] (3) The device has a stable structure, is easy to install, has a high degree of equipment integration, occupies a small area, and is safe to test, saving time and effort. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 It is a schematic diagram of the overall structure of the device of the utility model;

[0021] Figure 2 It is a schematic diagram of the test structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the main support structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the rotation test structure of the utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the rotating platform of the utility model;

[0025] Figure 6 This is a schematic diagram of the adjustable overspeed protection structure of the utility model;

[0026] Figure 7 This is a schematic diagram of the internal structure of the installation box of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the second motor and its output end of the utility model;

[0028] Fig. 9 This is a schematic diagram of the structure of the overspeed protection sleeve of the utility model;

[0029] Fig.10 This is a schematic diagram of the flying pendulum structure of the utility model;

[0030] Fig.11 It is a partial cross-sectional schematic diagram of the overspeed protection cover and the flying pendulum matching structure of the utility model.

[0031] In the figure: protective outer box 1, hinge structure 2, opening and closing door 3, first observation window 4, second observation window 5, locking member 6, main bracket 7, electric control box 8, hydraulic system 9, support arm 10, overspeed detection device 11, pipeline structure 12, switching valve switch 13, first fixed seat 14, hollow turbine reducer 15, planetary reducer 16, first motor 17, second fixed seat 18, rotating platform structure 19, adjustable overspeed protection structure 20, counterweight block 21, Mounting seat 22, support column 23, turntable 24, reinforcing arm 25, mounting groove 26, mounting box 27, mounting connecting plate 28, connecting arm 29, proximity switch 30, second motor 31, connecting rod 32, tightening sleeve 33, adjusting nut 34, adjusting screw 35, limiting connecting plate 36, overspeed protection sleeve 37, mounting ring 38, elastic member 39, flying pendulum 40, matching cavity 41, limiting slide groove 42, limiting ring 43, positioning ring groove 44, speed sensor 45. DETAILED DESCRIPTION

[0032] like Figure 1-11 In the invention, a centrifugal force tripping test device comprises a protective outer box 1, the protective outer box 1 is provided with an opening and closing door 3 connected thereto through a hinge structure 2, the protective outer box 1 is provided with a plurality of first observation windows 4, the opening and closing door 3 is provided with a plurality of second observation windows 5 and a locking member 6, and a test structure is provided inside the protective outer box 1;

[0033] The test structure includes a main support 7, an electric control box 8 and a hydraulic system 9 are provided at the bottom of the main support 7, a first fixing seat 14 is provided on the main support 7, a hollow turbine reducer 15 is provided on the first fixing seat 14, the hollow turbine reducer 15 is connected to the output end of the first motor 17 through a planetary reducer 16, the first motor 17 is connected to the main support 7 through a second fixing seat 18, the output end of the hollow turbine reducer 15 is connected to a rotating platform structure 19, an adjustable overspeed protection structure 20 and a counterweight 21 are provided on the rotating platform structure 19, the main support 7 is connected to an overspeed detection device 11 through a support arm 10, and the overspeed detection device 11 is connected to the hydraulic system 9 through a pipeline structure 12;

[0034] The overspeed protection structure 20 includes a mounting box 27, a mounting connecting plate 28 matching the mounting groove 26 is provided at the bottom of the mounting box 27, a connecting arm 29 is provided on the mounting box 27, a proximity switch 30 is provided on the connecting arm 29, a second motor 31 is provided on the side of the mounting box 27 away from the proximity switch 30, the output end of the second motor 31 is connected to a tightening sleeve 33 through a connecting rod 32, the tightening sleeve 33 matches with an adjusting nut 34, and the adjusting nut 34 matches with an adjusting screw 35 threadedly The adjusting screw 35 is connected to an overspeed protection sleeve 37 arranged on the side of the installation box 27 close to the proximity switch 30 through a symmetrically arranged limit connecting plate 36. A flying pendulum 40 is arranged in the overspeed protection sleeve 37. The flying pendulum 40 is provided with a matching cavity 41 and a symmetrically arranged limit sliding groove 42 that cooperates with the limit connecting plate 36. The flying pendulum 40 is connected to the mounting ring 38 through an elastic member 39. The elastic member 39 and the mounting ring 38 are sleeved on the adjusting screw 35, and the mounting ring 38 cooperates with the adjusting nut 34.

[0035] In a preferred embodiment, the rotating platform structure 19 includes a mounting base 22 connected to the hollow turbine reducer 15, the mounting base 22 is connected to the turntable 24 through a support column 23, a plurality of reinforcing arms 25 are provided between the turntable 24 and the support column 23, and a mounting groove 26 is provided on the turntable 24 to cooperate with the overspeed protection structure 20.

[0036] In a preferred embodiment, the overspeed detection device 11 is provided with a switching valve switch 13 that cooperates with the flying pendulum 40 .

[0037] In a preferred solution, the first observation window 4 and the second observation window 5 are both explosion-proof glass.

[0038] In a preferred embodiment, a limiting ring 43 is provided on the adjusting nut 34 , and the limiting ring 43 is rotationally matched with a positioning ring groove 44 provided on the mounting ring 38 .

[0039] In a preferred solution, the first motor 17 is a high-precision and high-power servo motor.

[0040] In a preferred solution, the second motor 31 is a small torque motor.

[0041] In a preferred solution, a speed sensor 45 cooperating with the rotating platform structure 19 is provided on the first fixing seat 14 .

[0042] The method of using the utility model is:

[0043] Step 1: Assemble the test structure in the protective outer box 1 according to the test requirements;

[0044] Step 2: Install the adjustable overspeed protection structure 20 on the turntable 24, and align the flyweight 40 on the adjustable overspeed protection structure 20 with the switching valve switch 13 on the overspeed detection device 11;

[0045] Step 3: The second motor 31 can be used to drive the tightening sleeve 33 to rotate, thereby controlling the displacement of the adjusting nut 34, changing the stretching length of the elastic member 39, testing different tightnesses, and establishing a physical model in conjunction with the action value;

[0046] Step 4: During the test, the power is outputted by the first motor 17, and after passing through the planetary reducer 16 and the hollow turbine reducer 15, the rotation direction is changed to the axial direction, the overall speed of the rotating platform structure 19 is controlled, and the speed is controlled in a closed loop with the speed sensor 45;

[0047] Step 5: After the speed reaches a certain speed, the adjustable overspeed protection structure 20 is subjected to sufficient centrifugal force, the flying pendulum 40 pops out, triggers the proximity switch 36, and sends the first signal to the system;

[0048] Step 6: The popped-up flying pendulum 40 knocks open the switching valve switch 13 on the overspeed detection device 11, triggering the second signal. After comparing the two signals, the dead zone value of the overspeed protection is calculated.

[0049] The beneficial effects of the utility model are as follows: it has the function of measuring the dead zone of the releaser, and the test result is more accurate; the rule between the spring force value and the action value can be adjusted by changing the position of the adjusting nut, and online self-diagnosis can be performed; the device has a stable structure, is easy to install, has a high degree of equipment integration, occupies a small area, is safe to test, and saves time and effort.

Claims

1. A centrifugal force tripping test device, comprising a protective outer box (1), characterized in that: The protective outer box (1) is provided with an opening and closing door (3) connected thereto via a hinge structure (2), the protective outer box (1) is provided with a plurality of first observation windows (4), the opening and closing door (3) is provided with a plurality of second observation windows (5) and a locking member (6), and a test structure is provided inside the protective outer box (1); The test structure comprises a main support (7), an electric control box (8) and a hydraulic system (9) are provided at the bottom of the main support (7), a first fixing seat (14) is provided on the main support (7), a hollow turbine reducer (15) is provided on the first fixing seat (14), the hollow turbine reducer (15) is connected to the output end of the first motor (17) via a planetary reducer (16), the first motor (17) is connected to the main support (7) via a second fixing seat (18), the output end of the hollow turbine reducer (15) is connected to a rotating platform structure (19), an adjustable overspeed protection structure (20) and a counterweight (21) are provided on the rotating platform structure (19), the main support (7) is connected to an overspeed detection device (11) via a support arm (10), and the overspeed detection device (11) is connected to the hydraulic system (9) via a pipeline structure (12); The overspeed protection structure (20) comprises a mounting box (27), a mounting connecting plate (28) matching with the mounting groove (26) is provided at the bottom of the mounting box (27), a connecting arm (29) is provided on the mounting box (27), a proximity switch (30) is provided on the connecting arm (29), a second motor (31) is provided on a side of the mounting box (27) away from the proximity switch (30), an output end of the second motor (31) is connected to a tightening sleeve (33) via a connecting rod (32), the tightening sleeve (33) matches with an adjusting nut (34), and the adjusting nut (34) is threadedly matched with an adjusting screw (35). The adjusting screw (35) is connected to an overspeed protection sleeve (37) arranged on the side of the installation box (27) close to the proximity switch (30) through a symmetrically arranged limit connecting plate (36). A flying pendulum (40) is arranged in the overspeed protection sleeve (37). The flying pendulum (40) is provided with a matching cavity (41) and a symmetrically arranged limit sliding groove (42) that matches the limit connecting plate (36). The flying pendulum (40) is connected to the mounting ring (38) through an elastic member (39). The elastic member (39) and the mounting ring (38) are outer-mounted on the adjusting screw (35), and the mounting ring (38) matches the adjusting nut (34).

2. The centrifugal force tripping test device according to claim 1, characterized in that: The rotating platform structure (19) comprises a mounting seat (22) connected to the hollow turbine reducer (15); the mounting seat (22) is connected to a turntable (24) via a support column (23); a plurality of reinforcing arms (25) are provided between the turntable (24) and the support column (23); and a mounting groove (26) is provided on the turntable (24) for cooperating with the overspeed protection structure (20).

3. The centrifugal force tripping test device according to claim 1, characterized in that: The overspeed detection device (11) is provided with a switching valve switch (13) that cooperates with the flying pendulum (40).

4. The centrifugal force tripping test device according to claim 1, characterized in that: The first observation window (4) and the second observation window (5) are both explosion-proof glass.

5. The centrifugal force tripping test device according to claim 1, characterized in that: The adjusting nut (34) is provided with a limiting ring (43), and the limiting ring (43) is rotationally matched with a positioning ring groove (44) provided on the mounting ring (38).

6. The centrifugal force tripping test device according to claim 1, characterized in that: The first motor (17) is a high-precision, high-power servo motor.

7. The centrifugal force tripping test device according to claim 1, characterized in that: The second motor (31) is a small torque motor.

8. The centrifugal force tripping test device according to claim 1, characterized in that: The first fixed seat (14) is provided with a speed sensor (45) that cooperates with the rotating platform structure (19).

Images