A multi-form rubbing experiment device for a misalignment-rubbing coupling fault rotor system

Abstract

The application discloses a kind of not centering-coupling fault rotor system multi-form rubbing experiment device, the device includes base, rotor system being installed on base, amount of misalignment adjusting mechanism, rubbing test mechanism, rotor system is installed with turntable, rubbing test mechanism is set on base and located the turntable side of rotor system, amount of misalignment adjusting mechanism is installed at the bottom of rotor system;The device can realize point rubbing, line rubbing, local rubbing, whole rubbing, continuous local rubbing, discontinuous local rubbing and other simulation experiments by rubbing test mechanism, and can be switched arbitrarily, improve the diversity of experiment;By amount of misalignment adjusting mechanism, various forms of rubbing experiment are carried out under misalignment condition, and then multi-form rubbing experiment of not centering-coupling fault rotor system is realized;And the device structure of the application is simple, easy to operate.

Description

Technical Field

[0001] This invention belongs to the field of collision test technology, specifically relating to a multi-form collision test device for a rotor system with misalignment-collision coupling fault. Background Technology

[0002] Rotating machinery has a complex structure, and the clearance between the rotor and stator must be very small. Complex operating conditions increase the frequency of rubbing failures. Once a rubbing failure occurs, it will cause increased vibration and wear in the rotor system, affecting the normal operation of the unit and reducing production efficiency. Rotor-stator rubbing is a typical twin failure, mostly derived from misalignment failures, and has obvious coupled failure characteristics. In particular, misalignment-rubbing coupled failure is the most common. Therefore, simulating misalignment-rubbing coupled failure and analyzing its vibration characteristics is of great significance.

[0003] Currently, rotor test benches are commonly used in laboratories to simulate various operating states of rotating machinery. However, simulating rotor-stator rubbing faults has always been a significant problem that has not been well resolved for a long time. Existing rubbing devices mainly consist of friction screws and supports fastened to the test bench. They primarily rely on adjusting the distance between the bolts and the shaft to simulate rubbing faults. In this rubbing fault experiment, the rubbing is mainly based on bolt-rotor contact (i.e., single-point contact), which does not match the rubbing situation between the rotor and stator under most actual working conditions. It cannot simulate common multi-point rubbing, local rubbing, and full-circumference rubbing. Summary of the Invention

[0004] To address the problems existing in the prior art, the present invention provides a multi-form rubbing test device for a rotor system with misalignment-rubbing coupling fault. The device includes a base, a rotor system mounted on the base, a misalignment adjustment mechanism, and a rubbing test mechanism. A turntable is mounted on the rotor system, the rubbing test mechanism is set on the base and located on one side of the turntable of the rotor system, and the misalignment adjustment mechanism is installed at the bottom of the rotor system.

[0005] The misalignment adjustment mechanism includes a base I, a base II, fixing bolts, and an adjustment knob. The base I is fixed on the base, and the base II is set on the base I by the fixing bolts and can move relative to the base I. The adjustment knob is set on one side of the base II by the adjustment seat and is used to push the base II to move. The motor I of the rotor system is installed on the base I.

[0006] The impact testing mechanism includes slide rails, a slider, mounting bases, lead screw I, a limit rod, motor II, a telescopic block adjustment mechanism, and impact platforms. Two slide rails are fixed parallel to each other on the base and located on one side of the turntable. The slider is mounted on the slide rails and cooperates with them. Two mounting bases are fixed on the base and located at both ends of the two slide rails. Lead screw I and the limit rod pass through the slider and are installed between the two mounting bases. Motor II is fixed on the mounting base, and its output shaft is connected to lead screw I for transmission. Two mounting platforms are mounted on the slider, and one end of the connecting rod is connected to the telescopic block. The adjustment mechanism is connected at one end, and the other end passes through the mounting platform and connects to the friction platform. The connecting rod is a hollow round rod, and the friction platform is a stepped round sleeve. The inner side of the friction platform is provided with a full-circumference friction plate. The full-circumference friction plate is a stepped round sleeve and fits tightly with the friction platform. The friction platform is fitted onto the rotor system. The friction platform and the full-circumference friction plate are respectively provided with one or more storage slots and one or more openings, and the storage slots and openings are positioned accordingly. A telescopic block is provided in the storage slot. The partial friction plate is fixed on the telescopic block, and the telescopic block is fixedly connected to the telescopic block adjustment mechanism.

[0007] The rotor system is a conventional structure, which includes a motor I, a coupling, a bearing housing with bearings, a rotating shaft, and a load. The output shaft of the motor I is connected to one end of the rotating shaft through the coupling, and the other end of the rotating shaft passes through two bearing housings with bearings and is fixed to the load. The turntable is a cylindrical disc or a cylindrical disc with blades installed. The turntable is set on the rotating shaft and located between the two bearing housings with bearings.

[0008] The telescopic block adjustment mechanism is an adjustment mechanism consisting of motor III and lead screw II, or a hydraulic telescopic rod, or other mechanical structure capable of adjusting telescopic movement. Lead screw II or telescopic rod is installed inside a hollow connecting rod, and the telescopic block is fixedly connected to the end of lead screw II or telescopic rod.

[0009] The local rubbing pad is an arc-shaped piece or a cone, and the thickness of the whole circumference rubbing pad is 2-5mm. The material of the local rubbing pad and the whole circumference rubbing pad can be changed according to experimental needs. Multiple whole circumference rubbing pads with different thicknesses can be set. The whole circumference rubbing pad and the local rubbing pad are detachable.

[0010] The adjustment knob is equipped with a scale with a length of 2.5 mm and a scale accuracy of 0.01 mm, which is used to adjust for misalignment faults.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows: The present invention, through the structural design of the impact testing mechanism, can achieve impact testing by contacting the turntable, and the turntable is set as a cylinder or a cylinder with blades installed, which can achieve surface impact or line impact; when the impact testing mechanism and the turntable conduct impact testing, they can switch arbitrarily between point impact, partial impact or full circumferential impact, which improves the diversity of the experiment, and the materials for partial and full circumferential impact can be replaced as needed. At the same time, partial impact can achieve continuous partial impact or discontinuous partial impact, which further increases the applicability of the device and meets different experimental needs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the device structure of the present invention;

[0013] Figure 2 This is a top view of the device of the present invention;

[0014] Figure 3 This is a schematic diagram of the device structure of the present invention;

[0015] Figure 4 This is a schematic diagram of the rotor system structure of the present invention;

[0016] Figure 5 This is a schematic diagram of the impact testing mechanism of the present invention;

[0017] Figure 6 A schematic diagram of the mounting platform and the circumferential friction plate structure;

[0018] Figure 7 The diagram shows the structure of the telescopic block and the partial friction plate, with the left image showing the partial friction plate and the right image showing the cone.

[0019] Figure 8 This is a schematic diagram of the misalignment adjustment mechanism;

[0020] Figure 9 Schematic diagrams of the turntable (left) and the turntable with blades (right);

[0021] In the diagram: 1. Base; 2. Rotor system; 201. Motor I; 202. Coupling; 203. Bearing housing with bearing; 204. Shaft; 205. Load; 3. Turntable; 4. Misalignment adjustment mechanism; 401. Fixing bolt; 402. Adjustment knob; 403. Adjustment seat; 404. Base I; 405. Base II; 5. Friction test mechanism; 501. Slide rail; 502. Slider; 503. Mounting seat; 504. Lead screw I; 505. Limiting rod; 506. Motor II; 507. Mounting platform; 508. Connecting rod; 509. Telescopic block adjustment mechanism; 510. Friction platform; 511. Full circumference friction plate; 512. Storage slot; 513. Opening; 514. Telescopic block; 515. Partial friction plate. Detailed Implementation

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments, but the scope of protection of the present invention is not limited to the contents described herein;

[0023] Example 1: As Figure 1-9 As shown, this multi-form rubbing test device for a rotor system with misalignment-rubbing coupling fault includes a base 1, a rotor system 2, a turntable 3, a misalignment adjustment mechanism 4, and a rubbing test mechanism 5. The rotor system 2 includes a motor I 201, a coupling 202, bearing housings 203 with bearings, a rotating shaft 204, and a load 205. The output shaft of the motor I 201 is connected to one end of the rotating shaft 204 via the coupling 202. The other end of the rotating shaft 204 passes through two bearing housings 203 and is fixed to the load 205. The two bearing housings 203 are bolted to the base 1. The turntable 3 is a cylindrical disc, mounted on the rotating shaft 204 and positioned between the two bearing housings. Between seats 203; the misalignment adjustment mechanism 4 includes base I 404, base II 405, fixing bolt 401, and adjustment knob 402. Base I is fixed to base 1 by bolts. Base II 405 has strip holes at its four corners. Base II is set on base I by fixing bolt 401 and strip holes, and base II can move relative to base I. Two adjustment seats 403 are fixed to base I 404 by bolts and located on one side of base II 405. One end of adjustment knob 402 passes through adjustment seat 403 and is fixed to one side of base II. Adjustment knob 402 is threaded with adjustment seat 403 and is used to push base II to move back and forth. Motor I 201 is fixed on base II.

[0024] The impact testing mechanism 5 includes a slide rail 501, a slider 502, a mounting base 503, a lead screw I 504, a limiting rod 505, a motor II 506, a telescopic block adjustment mechanism 509, and an impact platform 510. Two slide rails 501 are welded parallel to each other and fixed on the base 1, located on one side of the turntable 3. The slider 502 is mounted on and cooperates with the slide rails 501. Two mounting bases 503 are fixed on the base 1 and located at both ends of the two slide rails 501. The lead screw I 504 and the limiting rod 505 pass through the slider 502 and are installed between the two mounting bases 503. The motor II 506 is fixed on the mounting base 503, and its output shaft is connected to the lead screw I 504. Two mounting platforms 507 are mounted on the slider 502. The telescopic block adjustment mechanism 509 is a hydraulic telescopic rod, which is mounted on one mounting platform 507. The connecting rod 508 has one end mounted on a mounting platform and the other end passing through another mounting platform and connected to the friction platform 510. The connecting rod 508 is a hollow round rod, and the telescopic end of the hydraulic telescopic rod is located inside the connecting rod. The friction platform 510 and the circumferential friction plate 511 are respectively provided with a storage groove 512 and an opening 513, and the storage groove and the opening are positioned accordingly. The arc-shaped partial friction plate 515 is fixed on the telescopic block 514, and the telescopic block 514 is fixed on the telescopic end of the hydraulic telescopic rod and placed in the storage groove and the opening. The friction platform 510 is a stepped round sleeve, and the inner side of the friction platform 510 is provided with the circumferential friction plate 511. The circumferential friction plate 511 is a stepped round sleeve and fits tightly with the friction platform 510. The thickness of the circumferential friction plate is 3mm. The friction platform 510 is fitted on the rotating shaft 204.

[0025] When the above device is in use, motor II 506 is started. Motor II drives lead screw I 504 to rotate inside slider 502, which in turn drives slider 502 to make linear motion on slide rail 501. Changing the rotation direction of motor II can change the sliding direction of slider 502 on slide rail 501, ultimately realizing the reciprocating motion of slider 502 on slide rail 501. At the same time, the friction table 510 with full-circumference friction plate is placed on the surface of turntable 3. The friction table, full-circumference friction plate and turntable 3 are concentric circles. Distribution; During the movement of the rubbing table 510, the rubbing gap between the circumferential rubbing plate 511 and the turntable 3 will change. The rubbing gap between the circumferential rubbing plate 511 and the turntable 3 is controlled to be smaller until the rubbing gap between the turntable 3 and the circumferential rubbing plate 511 reaches the required level. The motor I201 is started. During the rotation of the turntable 3, it collides and rubs with the circumferential rubbing plate 511. The turntable 3 is a cylindrical disk. The circumferential rubbing plate 511 contacts the cylindrical surface of the turntable 3 to simulate the circumferential surface rubbing experiment.

[0026] When the telescopic block adjustment mechanism 509 (hydraulic telescopic rod) is activated, the telescopic end of the hydraulic telescopic rod causes the telescopic block 514 in the storage groove 512 to extend outward. The telescopic block 514 and the local contact plate 515 pass through the opening 513 and protrude on the inner wall surface of the circumferential contact plate. During the rotation of the turntable 3, it contacts the arc-shaped local contact plate 515 to simulate a local surface contact experiment.

[0027] When the local rubbing pad 515 is a cone, a point-like rubbing experiment can be simulated.

[0028] The size of the local contact pad 515 can be adjusted according to requirements and can be replaced at the telescopic end of the hydraulic telescopic rod to realize the change of the size of the local contact area in the local contact test;

[0029] Before the collision test, the misalignment fault condition can be set by adjusting the misalignment amount 4. Specifically, the four fixing bolts 401 on the base II 405 are loosened, and the two adjusting knobs 402 are rotated. The base II moves relative to the base I, thereby changing the horizontal position of the motor I 201. This causes the axis of the shaft connected to the coupling and the output shaft of the motor I to not coincide, that is, a misalignment fault occurs at the coupling. The collision test can then be carried out under the misalignment condition, thereby realizing a multi-form collision test of the rotor system with misalignment-collision coupling fault.

[0030] Example 2: As Figure 7 , 9 As shown, the structure of the device in this embodiment is the same as that in embodiment 1, except that: the turntable is a cylindrical disk with blades installed; the rubbing table 510 and the circumferential rubbing plate 511 are respectively provided with 4 storage slots 512 and 4 openings 513, and the storage slots and openings are positioned accordingly; the telescopic block adjustment mechanism is an adjustment mechanism that cooperates with motor III and lead screw II, the output shaft of motor III is fixedly connected to lead screw II, lead screw II is set in the hollow connecting rod, and the telescopic block is fixedly connected to the end of lead screw II; the adjustment knob is provided with a scale with a scale length of 2.5mm;

[0031] When the above device is used, the motor I201 is started. During the rotation of the turntable 3, when the full-circumference contact plate 511 or the partial contact plate 515 comes into contact with the edge of the blade on the turntable 3, it is a line contact, realizing the partial line contact test or the full-circumference line contact test of the turntable 3.

[0032] The installation position of the turntable 3 on the rotor system 2 is adjustable, and the position of the rubbing test mechanism 5 on the turntable 3 is also adjustable, which can simulate the center rubbing test or the eccentric rubbing test of the turntable 3 on the rotor system 2.

[0033] When multiple storage slots 512 are set, each storage slot can be equipped with a telescopic block with different types of local rubbing pads, and matched with relevant components in multiple corresponding rubbing test mechanisms to realize discontinuous local rubbing experiments.

[0034] Before the rubbing test, the misalignment fault condition can be set by adjusting the misalignment amount 4. Specifically, the four fixing bolts 401 on the base II 405 are loosened, and the two adjusting knobs 402 are rotated. The base II moves relative to the base I, thereby changing the horizontal position of the motor I 201. This causes the axis of the shaft connected to the coupling and the output shaft of the motor I to not coincide, thus generating a misalignment fault at the coupling. Various forms of rubbing tests can then be carried out under the misalignment condition, thereby realizing multi-form rubbing tests of the rotor system with misalignment-rubbing coupling fault.

Claims

1. A multi-form rubbing test apparatus for a rotor system with misalignment-rubbing coupling fault, comprising a base (1) and a rotor system (2) mounted on the base (1), wherein a turntable (3) is mounted on the rotor system (2), characterized in that: It also includes a misalignment adjustment mechanism (4) and a rubbing test mechanism (5). The rubbing test mechanism is set on the base (1) and located on one side of the turntable of the rotor system (2). The misalignment adjustment mechanism is installed at the bottom of the rotor system (2). The misalignment adjustment mechanism (4) includes a base I (404), a base II (405), a fixing bolt (401), and an adjustment knob (402). The base I is fixed on the base (1). The base II is set on the base I by the fixing bolt (401) and the base II can move relative to the base I. The adjustment knob (402) is set on one side of the base II by the adjustment seat (403) and is used to push the base II to move. The motor I of the rotor system (2) is installed on the base II. The collision test mechanism (5) includes a slide rail (501), a slider (502), a mounting base (503), a lead screw I (504), a limiting rod (505), a motor II (506), a telescopic block adjustment mechanism (509), and a collision platform (510). Two slide rails (501) are fixed parallel to each other on the base (1) and located on one side of the turntable (3). The slider (502) is set on the slide rail (501) and cooperates with it. Two mounting bases (503) are fixed on the base (1) and located at both ends inside the two slide rails (501). The lead screw I (504) and the limiting rod (505) pass through the slider (502) and are installed between the two mounting bases (503). The motor II (506) is installed between the two mounting bases (503). 06) Fixed on the mounting base (503) and its output shaft is connected to the lead screw I (504) for transmission. Two mounting platforms (507) are installed on the slider (502). One end of the connecting rod (508) is set on one mounting platform and communicates with the telescopic block adjustment mechanism (509). The other end passes through another mounting platform (507) and is connected to the rubbing platform (510). The connecting rod (508) is a hollow round rod. The rubbing platform (510) is a stepped round sleeve. The inner side of the rubbing platform (510) is provided with a full-circumference rubbing plate (511). The full-circumference rubbing plate (511) is a stepped round sleeve and fits tightly with the rubbing platform (510). The rubbing platform (510) is fitted on the rotor system (2). The rubbing platform (510) and the circumferential rubbing plate (511) are respectively provided with one or more storage slots (512) and one or more openings, and the storage slots and openings (513) are respectively positioned. A telescopic block (514) is provided in the storage slot (512), and the partial rubbing plate (515) is fixed on the telescopic block (514). The telescopic block (514) is fixedly connected to the telescopic block adjustment mechanism (509).

2. The multi-form rubbing test apparatus for misalignment-rubbing coupling fault rotor system according to claim 1, characterized in that: The rotor system (2) includes motor I (201), coupling (202), bearing housing (203) with bearings, shaft (204), and load (205). The output shaft of motor I (201) is connected to one end of shaft (204) through coupling (202). The other end of shaft (204) passes through two bearing housings (203) with bearings and is fixed to load (205). The turntable (3) is a cylindrical disk or a cylindrical disk with blades. The turntable (3) is set on shaft (204) and located between two bearing housings (203) with bearings.

3. The multi-form rubbing test apparatus for misalignment-rubbing coupling fault rotor system according to claim 1, characterized in that: The telescopic block adjustment mechanism (509) is an adjustment mechanism that combines motor Ⅲ and lead screw Ⅱ, or a hydraulic telescopic rod. Lead screw Ⅱ or telescopic rod is set inside the hollow connecting rod, and telescopic block (514) is fixedly connected to the end of lead screw Ⅱ or telescopic rod.

4. The multi-form rubbing test apparatus for misalignment-rubbing coupling fault rotor system according to claim 1, characterized in that: The local rubbing pad (515) is an arc-shaped piece or a cone, and the thickness of the whole circumference rubbing pad (511) is 2-5mm.

5. The multi-form rubbing test apparatus for misalignment-rubbing coupling fault rotor system according to claim 1, characterized in that: The whole-week rubbing pad (511) and the partial rubbing pad (515) are detachable.

6. The multi-form rubbing test apparatus for misalignment-rubbing coupling fault rotor system according to claim 1, characterized in that: The adjustment knob (402) has a scale with a length of 2.5mm.

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