CN111256997A - Test device for quantitatively simulating inner and outer double-rotor non-centering and coupling non-centering faults - Google Patents
Test device for quantitatively simulating inner and outer double-rotor non-centering and coupling non-centering faults Download PDFInfo
- Publication number
- CN111256997A CN111256997A CN202010109056.6A CN202010109056A CN111256997A CN 111256997 A CN111256997 A CN 111256997A CN 202010109056 A CN202010109056 A CN 202010109056A CN 111256997 A CN111256997 A CN 111256997A
- Authority
- CN
- China
- Prior art keywords
- shaft
- rotor
- quantitative
- misalignment
- sleeve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
Abstract
The invention relates to the technical field of rotor system fault simulation tests, in particular to a test device for quantitatively simulating the faults of decentration of an inner rotor and an outer rotor and the misalignment of a coupler. The invention aims to provide a test device for quantitatively simulating the misalignment of an inner rotor and an outer rotor and the misalignment of a coupler, and solves the technical problems that most rotating machinery simulation test beds in the prior art adopt a bearing seat and a gasket to carry out misalignment simulation of the coupler, and the simulation precision is difficult to effectively ensure through the design of the test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler.
Description
Technical Field
The invention relates to the technical field of rotor system fault simulation tests, in particular to a test device for quantitatively simulating the faults of decentration of an inner rotor and an outer rotor and the misalignment of a coupler.
Background
The occurrence of the non-concentric fault of an inner rotor system and an outer rotor system in a rotating machine or the non-centered fault of a coupling is inevitable, in particular to an aircraft engine. The non-concentricity fault of the inner rotor system and the outer rotor system is called as the non-concentricity of the double-rotor system when the axial leads of the inner rotor system and the outer rotor system are not coincident, and can be specifically divided into parallel non-concentricity, angle non-concentricity and comprehensive non-concentricity. The misalignment of the rotors, which is usually the inclination or offset of the shaft center lines of two adjacent rotors from the bearing center line, is a fault. The misalignment of the rotor can be divided into three conditions that the coupler is not aligned with the neutral bearing, the misalignment of the coupler can be divided into parallel misalignment and the misalignment of the deflection angle is not aligned with the neutral parallel deflection angle; the lack of bearings in pairs, including both the lack of skew and the change in elevation, results in additional bending moment at the coupling.
However, no corresponding fault simulation test bed exists at present, so that the fault characteristics are not clear at present. Most of existing rotating machinery simulation test beds adopt the mode that gaskets are added at bearing seats to simulate misalignment of the couplings, the mode can really realize simulation of misalignment faults of the couplings, and simulation precision of the simulation test beds is difficult to effectively guarantee due to various errors.
Therefore, in order to solve the above problems, the present invention urgently needs to provide a test device for quantitatively simulating the misalignment faults of the inner and outer dual rotors and the misalignment faults of the coupling.
Disclosure of Invention
The invention aims to provide a test device for quantitatively simulating the misalignment of an inner rotor and an outer rotor and the misalignment of a coupler, and solves the technical problems that in the prior art, most of rotating machinery simulation test beds adopt a bearing seat to add a gasket to simulate the misalignment of the coupler, and the simulation precision is difficult to effectively ensure through the design of the test device.
The invention provides a test device for quantitatively simulating the misalignment of an inner rotor and an outer rotor and the misalignment of a shaft coupling, which comprises an inner rotor, wherein inner rotor shafts at two ends of the inner rotor are connected with corresponding supports in a penetrating way through an inner rolling bearing and an inner shaft sleeve respectively; the outer rotor is sleeved outside the extension shaft, the outer rotor shaft at one end of the outer rotor is connected with the corresponding support in a penetrating manner through an outer rolling bearing and an outer shaft sleeve, the other end of the outer rotor is connected with a reducer shaft, an intermediate rolling bearing, an inner shaft sleeve and an outer shaft sleeve which are sequentially arranged in the reducer shaft in a penetrating manner are embedded in the reducer shaft, an outer rotor driving motor is arranged below the outer rotor, and an output shaft of the outer rotor driving motor is connected with the outer rotor shaft through a; an inner shaft sleeve through hole is formed in the support connected with the inner shaft sleeve, and an inner rotor shaft adjusting gap is formed between the inner wall of the inner shaft sleeve through hole and the outer wall of the inner shaft sleeve; an outer shaft sleeve through hole is formed in the support connected with the outer shaft sleeve, and an outer rotor shaft adjusting gap is formed between the inner wall of the outer shaft sleeve through hole and the outer wall of the outer shaft sleeve; a plurality of push plates are uniformly distributed in the adjusting gap of the inner rotor shaft and the adjusting gap of the outer rotor shaft at intervals in the circumferential direction, quantitative adjusting screw holes which are in one-to-one correspondence with the push plates are arranged on each support, screw rods which are in one-to-one correspondence with the quantitative adjusting screw holes are arranged on the push plates, quantitative rotating rods which are matched and rotate with the screw rods through rotating pieces are also arranged in the quantitative adjusting screw holes, and the quantitative rotating rods penetrate out of the quantitative adjusting screw holes and are connected with quantitative screw adjusting mechanisms fixed on the supports; an outer rotor shaft adjusting gap is arranged between the outer shaft sleeve and the inner shaft sleeve, a plurality of push plates are arranged in the outer rotor shaft adjusting gap at intervals in the circumferential direction, a reducer shaft through hole and an outer shaft sleeve through hole which correspond to the push plates one by one are respectively arranged on the outer shaft sleeve in the reducer shaft and the reducer shaft, and a screw rod on each push plate penetrates through the outer shaft sleeve through hole to be connected with the reducer shaft through hole in a threaded manner.
Furthermore, a bracket is arranged outside the reducing shaft in a penetrating way, a reducing shaft penetrating hole is arranged on the bracket, quantitative adjusting screw holes which are in one-to-one correspondence with the reducing shaft penetrating holes are arranged on the inner wall of the reducing shaft penetrating hole, quantitative rotating rods are arranged in the quantitative adjusting screw holes, and the quantitative rotating rods penetrate out of the quantitative adjusting screw holes and are connected with a quantitative screw adjusting mechanism on the bracket; and a bracket moving gap is arranged between the bracket on the reducing shaft and the adjacent bracket.
Furthermore, the quantitative spiral adjusting mechanism comprises a fixing plate fixed on the bracket, an inner sleeve is fixedly connected to the fixing plate in a penetrating manner, an outer sleeve is connected outside the inner sleeve in a threaded manner, a quantitative rotating rod penetrates out of the inner sleeve and is fixedly connected with a quantitative knob, the quantitative knob is provided with a directional arrow, and the outer sleeve is provided with a quantitative scale corresponding to the directional arrow in a matching manner; the fixed plate, the outer sleeve and the inner sleeve are provided with correspondingly communicated pin holes, internal threads are arranged in the pin holes, and positioning pins are screwed in the pin holes.
Further, the rotating piece comprises an inner hexagonal groove arranged at the end part of the screw rod, and a hexagonal protrusion arranged at the end part of the quantitative rotating rod and matched with the inner hexagonal groove in a spiral mode.
Furthermore, an inner rotor driving motor is fixed on the inner rotor rotating motor support, and an outer rotor driving motor is fixed on the outer rotor rotating motor fixing support; the bottoms of the brackets, the inner rotor rotating motor bracket and the outer rotor rotating motor fixing bracket are fixed on the supporting table through detachable connecting pieces.
Furthermore, push plate embedding grooves which are arranged in one-to-one correspondence with the push plates are arranged on the inner wall of the inner shaft sleeve through hole, the inner wall of the outer shaft sleeve through hole and the inner wall of the outer shaft sleeve in the reducing shaft.
Furthermore, the support comprises a transverse plate, a vertical plate extending upwards is arranged above the transverse plate, a support leg is arranged below the transverse plate, a support leg is arranged at the bottom of the support leg, a fixed connecting hole is formed in the support leg, and a positioning mounting hole corresponding to the fixed connecting hole is formed in the support table; and mounting bolts penetrate through the fixing connecting holes and the positioning mounting holes.
Further, the screw is made of a magnetic material.
Further, the quantitative scale is a micrometer.
Furthermore, the support platform is made of metal.
Compared with the prior art, the test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler has the following advantages that:
1. the invention provides a test device for quantitatively simulating the misalignment of an inner rotor and an outer rotor and the misalignment of a shaft coupling, wherein inner rotor shafts at two ends of the inner rotor are respectively connected with corresponding supports in a penetrating way through an inner rolling bearing and an inner shaft sleeve; the outer rotor is sleeved outside the extension shaft, the outer rotor shaft at one end of the outer rotor is connected with the corresponding support in a penetrating manner through an outer rolling bearing and an outer shaft sleeve, the other end of the outer rotor is connected with a reducer shaft, an intermediate rolling bearing, an inner shaft sleeve and an outer shaft sleeve which are sequentially arranged in the reducer shaft in a penetrating manner are embedded in the reducer shaft, an outer rotor driving motor is arranged below the outer rotor, and an output shaft of the outer rotor driving motor is connected with the outer rotor shaft through a; an inner shaft sleeve through hole is formed in the support connected with the inner shaft sleeve, and an inner rotor shaft adjusting gap is formed between the inner wall of the inner shaft sleeve through hole and the outer wall of the inner shaft sleeve; an outer shaft sleeve through hole is formed in the support connected with the outer shaft sleeve, and an outer rotor shaft adjusting gap is formed between the inner wall of the outer shaft sleeve through hole and the outer wall of the outer shaft sleeve; a plurality of push plates are uniformly distributed in the adjusting gap of the inner rotor shaft and the adjusting gap of the outer rotor shaft at intervals in the circumferential direction, quantitative adjusting screw holes which are in one-to-one correspondence with the push plates are arranged on each support, screw rods which are in one-to-one correspondence with the quantitative adjusting screw holes are arranged on the push plates, quantitative rotating rods which are matched and rotate with the screw rods through rotating pieces are also arranged in the quantitative adjusting screw holes, and the quantitative rotating rods penetrate out of the quantitative adjusting screw holes and are connected with quantitative screw adjusting mechanisms fixed on the supports; an outer rotor shaft adjusting gap is arranged between the outer shaft sleeve and the inner shaft sleeve, a plurality of push plates are distributed in the outer rotor shaft adjusting gap at intervals in the circumferential direction, a reducer shaft perforation and an outer shaft sleeve perforation which are in one-to-one correspondence with the push plates are respectively arranged on the outer shaft sleeve in the reducer shaft and the reducer shaft, a screw rod on each push plate penetrates through the outer shaft sleeve perforation and the reducer shaft perforation screw joint, the inner rotor and the outer rotor are not concentric through quantitative adjustment, or the first coupling and the second coupling are not centered through quantitative adjustment, the fault characteristics under different fault conditions are researched, and a theoretical basis and technical support are provided for diagnosis.
2. The quantitative adjusting device is characterized in that a bracket is arranged outside a reducing shaft in a penetrating manner, a reducing shaft penetrating hole is formed in the bracket, quantitative adjusting screw holes which correspond to the reducing shaft penetrating holes one by one are formed in the inner wall of the reducing shaft penetrating hole, quantitative rotating rods are arranged in the quantitative adjusting screw holes, and the quantitative rotating rods penetrate out of the quantitative adjusting screw holes and are connected with a quantitative screw adjusting mechanism on the bracket; the design that the bracket moving gap W is arranged between the bracket on the reducing shaft and the adjacent bracket can move the bracket on the reducing shaft after the outer shaft of the outer rotor is adjusted, the bracket is placed in the bracket moving gap, when the adjustment is needed, the bracket is moved, the bracket and the reducing shaft are correspondingly penetrated and installed, the adjustment of the outer shaft of the outer rotor is realized, and the adjustment is convenient.
3. The quantitative spiral adjusting mechanism comprises a fixing plate fixed on a support, an inner sleeve is fixedly connected to the fixing plate in a penetrating mode, an outer sleeve is connected to the outer portion of the inner sleeve in a threaded mode, a quantitative rotating rod penetrates out of the inner sleeve and is fixedly connected with a quantitative knob, a directional arrow is arranged on the quantitative knob, and a quantitative scale corresponding to the directional arrow in a matching mode is arranged on the outer sleeve; the fixed plate, outer sleeve and inner skleeve are equipped with the pinhole that corresponds the intercommunication, be equipped with the internal thread in the pinhole, the spiro union has the design of locating pin in the pinhole, when not adjusting, locating pin and ration rotary rod fastening, guarantee that the ration rotary rod does not contact with the screw rod, when needs are adjusted, not hard up locating pin, rotate quantitative knob, realize that the ration rotary rod rotates, thereby adjusting screw's rotation, according to the ration scale, rotate the scale that needs, the record data, rotate the outer sleeve, keep away from the screw rod with the ration rotary rod, rethread locating pin locking ration rotary rod, follow-up survey, through the above-mentioned design, the ration skew of internal and external rotor axle is adjusted has been realized, guarantee.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural view (front view) of a test apparatus according to the present invention;
FIG. 2 is a schematic structural view (front sectional view) illustrating a connection relationship between an inner rotor, an outer rotor, and an extension shaft according to the present invention;
FIG. 3 is a schematic structural view (side sectional view) of the bracket coupled to the inner hub according to the present invention;
FIG. 4 is an enlarged view taken at A in FIG. 3;
FIG. 5 is a schematic structural view (side sectional view) of the bracket coupled to the outer hub according to the present invention;
FIG. 6 is an enlarged view at B in FIG. 5;
FIG. 7 is a schematic structural view (side sectional view) of a reducer shaft according to the present invention;
FIG. 8 is a schematic structural view (front view) of a quantitative screw adjustment mechanism according to the present invention;
fig. 9 is a schematic structural view (front sectional view) of a quantitative screw adjustment mechanism according to the present invention.
Description of reference numerals:
1. an inner rotor; 101. an inner rotor shaft; 2. an inner sleeve; 3. a first coupling; 4. an extension shaft; 5. a second coupling; 6. an inner rotor driving motor; 7. an outer rotor; 8. a support; 9. an outer sleeve; 10. a variable diameter shaft; 701. an outer rotor shaft; 12. an outer rotor drive motor; 13. a belt; 14. The inner rotor shaft adjusts the clearance; 81. the inner shaft sleeve is perforated; 82. the outer shaft sleeve is perforated; 15. adjusting the clearance of the outer rotor shaft; 16. pushing the plate; 83. a quantitative adjusting screw hole; 17. a screw; 18. quantitatively rotating a rod; 19. A quantitative screw adjusting mechanism; 20. perforating the reducer shaft; 21. the outer shaft sleeve is perforated; w, a bracket moving gap; 191. a fixing plate; 192. an inner sleeve; 193. an outer sleeve; 194. a quantitative knob; 195. a pin hole; 24. a rotating member; 241. an inner hexagonal groove; 242. a hexagonal protrusion; 25. the inner rotor rotates the motor support; 26. the outer rotor rotates the motor fixed bolster; 27. a support table; 29. the push plate is embedded with a groove; 801. A transverse plate; 802. a vertical plate; 803. a support leg; 804. a support leg; 805. fixing the connecting hole; 271. positioning the mounting hole; 28. installing a bolt; 30. an inner rolling bearing; 31. an outer rolling bearing; 32. an intermediate rolling bearing.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 6, fig. 7, fig. 8, and fig. 9, the present embodiment provides a test device for quantitatively simulating the misalignment of the inner and outer dual rotors and the misalignment of the shaft couplings, including an inner rotor 1, the inner rotor shafts 101 at the two ends of the inner rotor 1 are respectively connected with the corresponding supports 8 through the inner rolling bearings 30 and the inner shaft sleeves 2, the inner rotor shaft 101 at one end of the inner rotor 1 is connected with an extension shaft 4 through a first shaft coupling 3, the extension shaft 4 is coaxially arranged with the inner rotor shaft 101, one end of the extension shaft 4 is connected with an inner rotor driving motor 6 through a second shaft coupling 5, and the two ends of the extension shaft 4 are connected with the corresponding supports 8 through the inner rolling bearings 30 and the inner shaft sleeves 2; an outer rotor 7 is sleeved outside the extension shaft 4, an outer rotor shaft 701 at one end of the outer rotor 7 is connected with a corresponding support 8 in a penetrating mode through an outer rolling bearing 31 and an outer shaft sleeve 9, the other end of the outer rotor shaft is connected with a reducer shaft 10, an intermediate rolling bearing 32, an inner shaft sleeve 2 and an outer shaft sleeve 9 which are sequentially arranged in the reducer shaft 10 in a penetrating mode are embedded in the reducer shaft, an outer rotor driving motor 12 is arranged below the outer rotor 7, and an output shaft of the outer rotor driving motor 12 is connected with the outer rotor shaft 701 through a belt 13; an inner shaft sleeve through hole 81 is formed in the support 8 connected with the inner shaft sleeve 2, and an inner rotor shaft adjusting gap 14 is formed between the inner wall of the inner shaft sleeve through hole 81 and the outer wall of the inner shaft sleeve 2; an outer shaft sleeve through hole 82 is formed in the support connected with the outer shaft sleeve 9, and an outer shaft adjusting gap 15 is formed between the inner wall of the outer shaft sleeve through hole 82 and the outer wall of the outer shaft sleeve 9; a plurality of push plates 16 are uniformly distributed in the inner rotor shaft adjusting gap 14 and the outer rotor shaft adjusting gap 15 at intervals in the circumferential direction, quantitative adjusting screw holes 83 corresponding to the push plates 16 one by one are formed in each support 8, screw rods 17 in threaded connection with the quantitative adjusting screw holes 83 one by one are formed in the push plates 16, quantitative rotating rods 18 which are matched with the screw rods 17 through rotating pieces 24 and rotate are further arranged in the quantitative adjusting screw holes 83, and the quantitative rotating rods 18 penetrate out of the quantitative adjusting screw holes 83 to be connected with quantitative spiral adjusting mechanisms 19 fixed on the supports 8; an outer rotor shaft adjusting gap 15 is arranged between the outer shaft sleeve 9 and the inner shaft sleeve 2, a plurality of push plates 16 are arranged at intervals in the outer rotor shaft adjusting gap 15, a reducer shaft through hole 20 and an outer shaft sleeve through hole 21 which are in one-to-one correspondence with the push plates 16 are respectively arranged on the reducer shaft 10 and the outer shaft sleeve 9 in the reducer shaft 10, and a screw 17 on each push plate penetrates through the outer shaft sleeve through hole 21 to be in threaded connection with the reducer shaft through hole 20.
The invention provides a test device for quantitatively simulating the misalignment of an inner rotor and an outer rotor and the misalignment of a shaft coupling, wherein inner rotor shafts 101 at two ends of an inner rotor 1 are respectively connected with corresponding supports 8 through an inner rolling bearing 30 and an inner shaft sleeve 2 in a penetrating manner, the inner rotor shaft 101 at one end of the inner rotor 1 is connected with an extension shaft 4 through a first shaft coupling 3, the extension shaft 4 and the inner rotor shaft 101 are coaxially arranged, one end of the extension shaft 4 is connected with an inner rotor driving motor 6 through a second shaft coupling 5, and two ends of the extension shaft 4 are connected with the corresponding supports 8 through the inner rolling bearing 30 and the inner shaft sleeve 2 in a penetrating manner; an outer rotor 7 is sleeved outside the extension shaft 4, an outer rotor shaft 701 at one end of the outer rotor 7 is connected with a corresponding support 8 in a penetrating mode through an outer rolling bearing 31 and an outer shaft sleeve 9, the other end of the outer rotor shaft is connected with a reducer shaft 10, an intermediate rolling bearing 32, an inner shaft sleeve 2 and an outer shaft sleeve 9 which are sequentially arranged in the reducer shaft 10 in a penetrating mode are embedded in the reducer shaft, an outer rotor driving motor 12 is arranged below the outer rotor 7, and an output shaft of the outer rotor driving motor 12 is connected with the outer rotor shaft 701 through a belt 13; an inner shaft sleeve through hole 81 is formed in the support 8 connected with the inner shaft sleeve 2, and an inner rotor shaft adjusting gap 14 is formed between the inner wall of the inner shaft sleeve through hole 81 and the outer wall of the inner shaft sleeve 2; an outer shaft sleeve through hole 82 is formed in the support connected with the outer shaft sleeve 9, and an outer shaft adjusting gap 15 is formed between the inner wall of the outer shaft sleeve through hole 82 and the outer wall of the outer shaft sleeve 9; a plurality of push plates 16 are uniformly distributed in the inner rotor shaft adjusting gap 14 and the outer rotor shaft adjusting gap 15 at intervals in the circumferential direction, quantitative adjusting screw holes 83 corresponding to the push plates 16 one by one are formed in each support 8, screw rods 17 in threaded connection with the quantitative adjusting screw holes 83 one by one are formed in the push plates 16, quantitative rotating rods 18 which are matched with the screw rods 17 through rotating pieces 24 and rotate are further arranged in the quantitative adjusting screw holes 83, and the quantitative rotating rods 18 penetrate out of the quantitative adjusting screw holes 83 to be connected with quantitative spiral adjusting mechanisms 19 fixed on the supports 8; the inner shaft sleeve 2 and the outer shaft sleeve 9 are arranged, an outer rotor shaft adjusting gap 15 is arranged between the outer shaft sleeve 9 and the inner shaft sleeve 2, a plurality of push plates 16 are arranged in the outer rotor shaft adjusting gap 15 at intervals in the circumferential direction, a variable-diameter shaft perforation 20 and an outer shaft sleeve perforation 21 which correspond to the push plates 16 one by one are respectively arranged on the variable-diameter shaft 10 and the outer shaft sleeve 9 in the variable-diameter shaft 10, a screw 17 on each push plate penetrates through the outer shaft sleeve perforation 21 and is in threaded connection with the variable-diameter shaft perforation 20, the inner rotor 1 and the outer rotor 10 are not concentric through quantitative adjustment, or the first coupling 3 and the second coupling 5 are not centered through quantitative adjustment, the fault characteristics under different fault conditions are researched, and theoretical basis and technical support are provided for diagnosis.
The push plate 16 of the present invention is integrally formed with the screw 17, and the push plate of the present invention may be circular, square, etc.
The test device of the invention comprises the following steps:
1) firstly, a plurality of push plates 16 are arranged in inner shaft sleeve through holes 81 and are screwed in the quantitative adjusting screw holes 83 through screw rods 17, and two inner rotor shafts 101 of an inner rotor 1 are sleeved in the inner shaft sleeve through holes 81 of two brackets 8 correspondingly after being sleeved with the inner shaft sleeve 2;
2) the outer rotor 7 is sleeved on the extension shaft 4 in a penetrating manner, the intermediate rolling bearing 32, the inner shaft sleeve 2 and the outer shaft sleeve 9 are arranged in the reducer shaft 10 at the right end of the outer rotor 7 after being sleeved on the extension shaft 4 in a penetrating manner, and the screw rods 17 of the plurality of push plates 16 are fixedly connected with the reducer shaft through holes 20 in a threaded manner after penetrating through the outer shaft sleeve through holes 21; the outer shaft at the left end of the outer rotor 7 is fixedly penetrated and installed with a bracket 8 provided with an outer shaft sleeve through hole 82 through an outer shaft sleeve 9; the two ends of the extension shaft 4 are sleeved with the inner shaft sleeves 2 and correspondingly arranged in the inner shaft sleeve through holes 81 of the two brackets 8;
3) an inner rotor shaft 101 of the inner rotor 1 is connected with an extension shaft 4 through a first coupler 3, and the inner rotor shaft 101 and the extension shaft 4 are arranged concentrically; the right end of the extension shaft 4 is connected with an inner rotor driving motor 6 through a second coupling 5;
4) an outer rotor driving motor 12 is connected with an outer shaft of the outer rotor 7 through a belt 13;
5) the quantitative rotation rods 18 are correspondingly arranged in quantitative adjustment screw holes 83 in a penetrating manner, and the quantitative adjustment screw holes 83 are connected with quantitative screw adjustment mechanisms 19 on the bracket 8.
The method comprises the following steps of (1) measuring the non-concentricity of an inner rotor and an outer rotor:
1) adjusting each quantitative screw adjusting mechanism 19 fixed on the inner rotor support 8, adjusting the quantitative rotating rod 18 to rotate through each quantitative screw adjusting mechanism 19, so that part of the screw rods 17 are screwed inwards, part of the screw rods 17 are screwed outwards, and part of the push plate 16 pushes the inner rotor shaft 101 to deflect under the driving of the screw rods 18; similarly, the outer shaft of the outer rotor 7 is also rotated through the screw 17, so that the push plates 16 move inwards or outwards, and the offset of the outer shaft of the outer rotor 7 is adjusted;
2) after the inner rotor 1 is quantitatively regulated, the inner rotor shaft 101 and the outer shaft of the outer rotor are started, the inner rotor driving motor 6 and the outer rotor driving motor 12 are started, the eccentric faults of the inner rotor and the outer rotor are measured, and the fault which is not centered is diagnosed by the first coupler 3 and the second coupler 5.
The test device for quantitatively simulating the misalignment of the inner and outer double rotors and the misalignment of the coupler can diagnose the misalignment of the inner and outer double rotors and the misalignment of the coupler, realizes the real simulation of the misalignment of the inner and outer double rotors and the coupler in the engine, ensures the reliability and authenticity of data by quantitatively adjusting through the quantitative screw adjusting mechanism 19, and provides theoretical basis and technical support for diagnosis.
As shown in fig. 1, 2 and 7, a bracket 8 is externally mounted on a reducer shaft 10 of the present embodiment in a penetrating manner, a reducer shaft penetrating hole is formed in the bracket 8, quantitative adjusting screw holes 83 corresponding to the reducer shaft penetrating holes one by one are formed in the inner wall of the reducer shaft penetrating hole, a quantitative rotating rod 18 is arranged in the quantitative adjusting screw hole 83, and the quantitative rotating rod 18 penetrates out of the quantitative adjusting screw hole 83 to be connected with a quantitative screw adjusting mechanism 19 on the bracket 8; and a bracket moving gap W is arranged between the bracket 8 on the reducing shaft 10 and the adjacent bracket 8.
The bracket 8 is arranged outside the reducer shaft 10 in a penetrating way, the bracket 8 is provided with a reducer shaft penetrating hole, the inner wall of the reducer shaft penetrating hole is provided with quantitative adjusting screw holes 83 which correspond to the reducer shaft penetrating holes one by one, a quantitative rotating rod 18 is arranged in the quantitative adjusting screw holes 83, and the quantitative rotating rod 18 penetrates out of the quantitative adjusting screw holes 83 to be connected with a quantitative screw adjusting mechanism 19 on the bracket 8; the design that a bracket moving gap W is arranged between the bracket 8 on the reducing shaft 10 and the adjacent bracket 8 can move the bracket 8 on the reducing shaft 10 after the outer shaft of the outer rotor 7 is adjusted, the bracket 8 is placed in the bracket moving gap W, when the adjustment is needed, the bracket 8 is moved, the bracket 8 and the reducing shaft 10 are correspondingly penetrated and installed, the adjustment of the outer shaft of the outer rotor 7 is realized, and the adjustment is convenient.
As shown in fig. 3, 5, 8 and 9, the quantitative screw adjusting mechanism 19 in the present embodiment includes a fixing plate 191 fixed on the bracket 8, an inner sleeve 192 is fixedly installed on the fixing plate 191, an outer sleeve 193 is externally screwed on the inner sleeve 192, the quantitative rotating rod 18 passes through the inner sleeve 192 and is fixedly connected with the quantitative knob 194, an arrow is provided on the quantitative knob 194, and the outer sleeve 192 is provided with a quantitative scale corresponding to the arrow; the fixing plate 191, the outer sleeve 192 and the inner sleeve 193 are provided with correspondingly communicated pin holes 195, internal threads are arranged in the pin holes 195, and positioning pins are screwed in the pin holes 195.
The quantitative spiral adjusting mechanism 19 comprises a fixing plate 191 fixed on the bracket 8, an inner sleeve 192 is fixedly connected on the fixing plate 191 in a penetrating manner, an outer sleeve 193 is connected outside the inner sleeve 192 in a threaded manner, a quantitative rotating rod 18 penetrates out of the inner sleeve 192 to be fixedly connected with a quantitative knob 194, the quantitative knob 194 is provided with a directional arrow, and the outer sleeve 192 is provided with a quantitative scale corresponding to the directional arrow in a matching manner; the fixing plate 191, the outer sleeve 192 and the inner sleeve 193 are provided with pin holes 195 which are correspondingly communicated, internal threads are arranged in the pin holes 195, and a positioning pin is screwed in the pin holes 195, when the fixing plate is not adjusted, the positioning pin is fastened with the quantitative rotating rod 18, so that the quantitative rotating rod 18 is ensured not to be in contact with the screw 17, when the adjustment is needed, the positioning pin is loosened, the quantitative knob 194 is rotated, the rotation of the quantitative rotating rod 18 is realized, the rotation of the screw 17 is adjusted, the required scale is rotated according to the quantitative scale, data is recorded, the outer sleeve 193 is rotated, the quantitative rotating rod 18 is far away from the screw 17, and then the quantitative rotating rod 18 is locked through the positioning pin for subsequent determination.
The inner sleeve 192 and the fixing plate 191 may be integrally connected by welding.
As shown in fig. 8 and 9, the rotary member 24 of the present embodiment includes an inner hexagonal groove 241 provided at the end of the screw 17, and a hexagonal protrusion 242 provided at the end of the quantitative rotary rod 18 and spirally matching with the inner hexagonal groove; the screw 17 is made of a magnetic material.
The rotating piece 24 comprises an inner hexagonal groove 241 arranged at the end part of the screw rod 17 and a hexagonal protrusion 242 which is arranged at the end part of the quantitative rotating rod 18 and is matched with the inner hexagonal groove in a spiral manner; the screw 17 is made of a magnetic material, so that the screw 17 rotates.
As shown in fig. 2, the inner rotor driving motor 3 in the present embodiment is fixed to the inner rotor rotation motor support 25, and the outer rotor driving motor 12 is fixed to the outer rotor rotation motor fixing support 26; the bottoms of the brackets 8, the inner rotor rotation motor bracket 25 and the outer rotor rotation motor fixing bracket 26 are fixed on a support table 27 through detachable connecting pieces.
The invention is fixed on the inner rotor rotating motor bracket 25 through the inner rotor driving motor 3, and the outer rotor driving motor 12 is fixed on the outer rotor rotating motor fixing bracket 26; the bottoms of the brackets 8, the inner rotor rotating motor bracket 25 and the outer rotor rotating motor fixing bracket 26 are fixed on the supporting table 27 through detachable connecting pieces, so that the fixed horizontality of each device is ensured, and the device is convenient to mount and dismount.
As shown in fig. 3, 4, 5, 6 and 7, the inner wall of the inner sleeve through hole 81, the inner wall of the outer sleeve through hole 82 and the inner wall of the outer sleeve 9 in the reducer shaft 10 in this embodiment are provided with push plate insertion grooves 29 corresponding to the push plates 7 one to one.
The design that the push plate embedding grooves 29 which are arranged in one-to-one correspondence with the push plates 7 are arranged on the inner wall of the inner shaft sleeve through hole 81, the inner wall of the outer shaft sleeve through hole 82 and the inner wall of the outer shaft sleeve 9 in the reducer shaft 10 is adopted, so that the installation of the push plates 7 is facilitated, and the installation of the inner rotor shaft and the outer shaft is facilitated.
As shown in fig. 3 and 5, the support 8 in this embodiment includes a horizontal plate 801, a vertical plate 802 extending upward is disposed above the horizontal plate 801, a support leg 803 is disposed below the horizontal plate 801, a support leg 804 is disposed at the bottom of the support leg 803, a fixing connection hole 805 is disposed on the support leg 804, and a positioning installation hole 271 corresponding to the fixing connection hole 805 is disposed on the support platform 27; the fixing connection hole 805 and the positioning installation hole 271 are provided with installation bolts 28.
According to the invention, the support 8 comprises a horizontal plate 801, an upwardly extending vertical plate 802 is arranged above the horizontal plate 801, a support leg 803 is arranged below the horizontal plate 801, a support leg 804 is arranged at the bottom of the support leg 803, a fixed connecting hole 805 is arranged on the support leg 804, and a positioning mounting hole 271 corresponding to the fixed connecting hole 805 is arranged on the support table 27; the design that the mounting bolts 28 penetrate through the fixing connecting holes 805 and the positioning mounting holes 271 facilitates the connection between the support 8 and the support platform 27, the mounting and fixing of the inner rotor and the outer rotor, and the mounting and fixing of the quantitative screw adjusting mechanism 19.
The support base 27 of the present invention is made of metal.
The quantitative scale of the invention is a micrometer.
Specifically, the method comprises the following steps of:
1) adjusting each quantitative screw adjusting mechanism 19 fixed on the inner rotor support 8, adjusting the quantitative rotating rod 18 to rotate through each quantitative screw adjusting mechanism 19, so that part of the screw rods 17 are screwed inwards, part of the screw rods 17 are screwed outwards, and part of the push plate 16 pushes the inner rotor shaft 101 to deflect under the driving of the screw rods 18; similarly, the outer shaft of the outer rotor 7 is also rotated through the screw 17, so that the push plates 16 move inwards or outwards, and the offset of the outer shaft of the outer rotor 7 is adjusted;
2) after the inner rotor 1 is quantitatively regulated, the inner rotor shaft 101 and the outer shaft of the outer rotor are started, the inner rotor driving motor 6 and the outer rotor driving motor 12 are started, the eccentric faults of the inner rotor and the outer rotor are measured, and the fault which is not centered is diagnosed by the first coupler 3 and the second coupler 5.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. The utility model provides a test device of inside and outside birotor decentraction and shaft coupling misalignment trouble of quantitative simulation which characterized in that: the inner rotor structure comprises an inner rotor (1), inner rotor shafts (101) at two ends of the inner rotor (1) are connected with corresponding supports (8) in a penetrating mode through inner rolling bearings (30) and inner shaft sleeves (2) respectively, the inner rotor shafts (101) at one end of the inner rotor (1) penetrate through the supports (8) and are connected with extension shafts (4) through first couplers (3), the extension shafts (4) and the inner rotor shafts (101) are coaxially arranged, one ends of the extension shafts (4) are connected with an inner rotor driving motor (6) through second shaft connectors (5), and two ends of the extension shafts (4) are further connected with the corresponding supports (8) in a penetrating mode through the inner rolling bearings (30) and the inner shaft sleeves (2); an outer rotor (7) is sleeved outside the extension shaft (4), the outer rotor shaft (701) at one end of the outer rotor (7) is connected with a corresponding support (8) in a penetrating mode through an outer rolling bearing (31) and an outer shaft sleeve (9), the other end of the outer rotor shaft is connected with a reducer shaft (10), an intermediate rolling bearing (32), an inner shaft sleeve (2) and an outer shaft sleeve (9) which are sequentially arranged in the reducer shaft (10) in a penetrating mode are embedded in the reducer shaft, an outer rotor driving motor (12) is arranged below the outer rotor (7), and an output shaft of the outer rotor driving motor (12) is connected with the outer rotor shaft (701) through a belt (13);
an inner shaft sleeve through hole (81) is arranged on a support (8) connected with the inner shaft sleeve (2), and an inner rotor shaft adjusting gap (14) is arranged between the inner wall of the inner shaft sleeve through hole (81) and the outer wall of the inner shaft sleeve (2); an outer shaft sleeve through hole (82) is arranged on the support connected with the outer shaft sleeve (9), and an outer rotor shaft adjusting gap (15) is arranged between the inner wall of the outer shaft sleeve through hole (82) and the outer wall of the outer shaft sleeve (9); a plurality of push plates (16) are uniformly distributed in the inner rotor shaft adjusting gap (14) and the outer rotor shaft adjusting gap (15) at intervals in the circumferential direction, quantitative adjusting screw holes (83) corresponding to the push plates (16) one by one are formed in each support (8), screw rods (17) in threaded connection with the quantitative adjusting screw holes (83) one by one are arranged on the push plates (16), quantitative rotating rods (18) which are matched and rotated with the screw rods (17) through rotating pieces (24) are further arranged in the quantitative adjusting screw holes (83), and the quantitative rotating rods (18) penetrate out of the quantitative adjusting screw holes (83) to be connected with quantitative screw adjusting mechanisms (19) fixed on the supports (8); an outer rotor shaft adjusting gap (15) is arranged between the outer shaft sleeve (9) and the inner shaft sleeve (2), a plurality of push plates (16) are arranged in the outer rotor shaft adjusting gap (15) at intervals in the circumferential direction, a reducing shaft perforation (20) and an outer shaft sleeve perforation (21) which correspond to the push plates (16) one by one are respectively arranged on the reducing shaft (10) and the outer shaft sleeve (9) in the reducing shaft (10), and a screw rod (17) on each push plate penetrates through the outer shaft sleeve perforation (21) to be in threaded connection with the reducing shaft perforation (20).
2. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 1, wherein: the bracket (8) is arranged outside the reducing shaft (10) in a penetrating way, the bracket (8) is provided with a reducing shaft penetrating hole, the inner wall of the reducing shaft penetrating hole is provided with quantitative adjusting screw holes (83) which correspond to the reducing shaft penetrating holes one by one, a quantitative rotating rod (18) is arranged in the quantitative adjusting screw hole (83), and the quantitative rotating rod (18) penetrates out of the quantitative adjusting screw holes (83) to be connected with a quantitative spiral adjusting mechanism (19) on the bracket (8); a bracket moving gap (W) is arranged between the bracket (8) on the reducing shaft (10) and the adjacent bracket (8).
3. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 2, wherein: the quantitative spiral adjusting mechanism (19) comprises a fixing plate (191) fixed on the support (8), an inner sleeve (192) is fixedly connected to the fixing plate (191) in a penetrating mode, an outer sleeve (193) is connected to the outer portion of the inner sleeve (192) in an external threaded mode, a quantitative rotating rod (18) penetrates out of the inner sleeve (192) and is fixedly connected with a quantitative knob (194), a directional arrow is arranged on the quantitative knob (194), and a quantitative scale corresponding to the directional arrow in a matching mode is arranged on the outer sleeve (192); the fixing plate (191), the outer sleeve (192) and the inner sleeve (193) are provided with correspondingly communicated pin holes (195), internal threads are arranged in the pin holes (195), and positioning pins are screwed in the pin holes (195).
4. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 3, wherein: the rotating piece (24) comprises an inner hexagonal groove (241) arranged at the end part of the screw rod (17), and a hexagonal protrusion (242) which is arranged at the end part of the quantitative rotating rod (18) and is matched with the inner hexagonal groove in a spiral mode.
5. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 4, wherein: the inner rotor driving motor (3) is fixed on the inner rotor rotating motor bracket (25), and the outer rotor driving motor (12) is fixed on the outer rotor rotating motor fixing bracket (26); the bottoms of the brackets (8), the inner rotor rotating motor bracket (25) and the outer rotor rotating motor fixing bracket (26) are fixed on a supporting platform (27) through detachable connecting pieces.
6. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 5, wherein: push plate embedding grooves (29) which are arranged in one-to-one correspondence with the push plates (7) are arranged on the inner wall of the inner shaft sleeve through hole (81), the inner wall of the outer shaft sleeve through hole (82) and the inner wall of the outer shaft sleeve (9) in the reducing shaft (10).
7. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 6, wherein: the support (8) comprises a transverse plate (801), a vertical plate (802) extending upwards is arranged above the transverse plate (801), a supporting leg (803) is arranged below the transverse plate (801), a supporting leg (804) is arranged at the bottom of the supporting leg (803), a fixed connecting hole (805) is arranged on the supporting leg (804), and a positioning mounting hole (271) corresponding to the fixed connecting hole (805) is arranged on the support table (27); and mounting bolts (28) are arranged in the fixing connecting holes (805) and the positioning mounting holes (271) in a penetrating way.
8. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 7, wherein: the screw (17) is made of magnetic material.
9. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 8, wherein: the quantitative scale is a micrometer.
10. The test device for quantitatively simulating the misalignment of the inner rotor and the outer rotor and the misalignment of the coupler according to claim 9, wherein: the support table (27) is made of metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010109056.6A CN111256997B (en) | 2020-02-21 | 2020-02-21 | Test device for quantitatively simulating inner and outer double-rotor non-centering and coupling non-centering faults |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010109056.6A CN111256997B (en) | 2020-02-21 | 2020-02-21 | Test device for quantitatively simulating inner and outer double-rotor non-centering and coupling non-centering faults |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111256997A true CN111256997A (en) | 2020-06-09 |
| CN111256997B CN111256997B (en) | 2021-05-07 |
Family
ID=70951175
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010109056.6A Active CN111256997B (en) | 2020-02-21 | 2020-02-21 | Test device for quantitatively simulating inner and outer double-rotor non-centering and coupling non-centering faults |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111256997B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130199292A1 (en) * | 2009-10-08 | 2013-08-08 | Moscow Mills, Inc. | Balance Test Indexing Tool for Balance-Testing a Rotor |
| CN103759934A (en) * | 2014-01-26 | 2014-04-30 | 清华大学 | Birotor fault simulation experiment device |
| CN105403386A (en) * | 2015-11-05 | 2016-03-16 | 郑州轻工业学院 | Rotor experiment table with centering adjustment and detection functions |
| CN205879526U (en) * | 2016-04-19 | 2017-01-11 | 镇江索达联轴器有限公司 | Shaft coupling is centering failure test system not |
| CN205941030U (en) * | 2016-08-22 | 2017-02-08 | 贝加莱工业自动化（中国）有限公司 | Vibration state simulation experiment device |
| CN207336013U (en) * | 2017-07-27 | 2018-05-08 | 湖南科技大学 | Dual rotors system coupling misaligns simulator |
| CN207556836U (en) * | 2017-12-25 | 2018-06-29 | 山东科技大学 | Hydraulic regulation formula bearings rotor misalignment experimental bench |
| CN108519235A (en) * | 2018-03-17 | 2018-09-11 | 北京化工大学 | Air impeller drive-type birotor testing stand |
-
2020
- 2020-02-21 CN CN202010109056.6A patent/CN111256997B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20130199292A1 (en) * | 2009-10-08 | 2013-08-08 | Moscow Mills, Inc. | Balance Test Indexing Tool for Balance-Testing a Rotor |
| CN103759934A (en) * | 2014-01-26 | 2014-04-30 | 清华大学 | Birotor fault simulation experiment device |
| CN105403386A (en) * | 2015-11-05 | 2016-03-16 | 郑州轻工业学院 | Rotor experiment table with centering adjustment and detection functions |
| CN205879526U (en) * | 2016-04-19 | 2017-01-11 | 镇江索达联轴器有限公司 | Shaft coupling is centering failure test system not |
| CN205941030U (en) * | 2016-08-22 | 2017-02-08 | 贝加莱工业自动化（中国）有限公司 | Vibration state simulation experiment device |
| CN207336013U (en) * | 2017-07-27 | 2018-05-08 | 湖南科技大学 | Dual rotors system coupling misaligns simulator |
| CN207556836U (en) * | 2017-12-25 | 2018-06-29 | 山东科技大学 | Hydraulic regulation formula bearings rotor misalignment experimental bench |
| CN108519235A (en) * | 2018-03-17 | 2018-09-11 | 北京化工大学 | Air impeller drive-type birotor testing stand |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111256997B (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102967459B (en) | Simulated experiment system for fault of rotary machine | |
| CN111256997B (en) | Test device for quantitatively simulating inner and outer double-rotor non-centering and coupling non-centering faults | |
| CN114646466B (en) | Rolling bearing test equipment with load and assembly double simulation | |
| CN108817934A (en) | A kind of long shaft coupler concentricity adjusting process | |
| CN113607411B (en) | Torque limiter test system and method | |
| CN202903482U (en) | Shafting and bearing fault simulation experiment system | |
| CN213239457U (en) | Rotor bearing test device | |
| CN110595767A (en) | Gear drive system fault simulation experiment table capable of rapidly replacing parts | |
| CN206544002U (en) | Pump shaft centering adjusts servicing unit | |
| CN108226559A (en) | A kind of speed measuring device for no external part major diameter rotary shaft | |
| CN110514170B (en) | Vertical rotating machinery main shaft axis measuring device | |
| CN113404654A (en) | Wind power generation simulation experiment device | |
| CN114235318A (en) | Multifunctional vibration test bench | |
| CN105738472A (en) | Rotating probe ultrasonic flaw detection device | |
| CN211121961U (en) | Loading test device of drum-shaped filter screen speed reduction driving device | |
| CN219757201U (en) | Alignment device for rotary equipment | |
| CN109751936A (en) | Retarder shafting play measuring device | |
| CN106066242A (en) | Automotive transmission loading testboard and test control method thereof | |
| CN210719655U (en) | Testing equipment for motor driving assembly | |
| CN220437327U (en) | Coaxiality detection device for valve seat hole and guide pipe hole of cylinder cover | |
| CN216483945U (en) | Performance detection device of radial sliding bearing | |
| CN220206584U (en) | Shaft torsion angle measuring device | |
| CN216954262U (en) | Wind generating set shaft coupling testing arrangement that beats | |
| CN214173968U (en) | Connecting rod device capable of measuring length for fatigue testing machine | |
| CN217765506U (en) | Tapered roller bearing testing machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |