CN214471750U - Fatigue test platform for main bearing of RV reducer - Google Patents
Fatigue test platform for main bearing of RV reducer Download PDFInfo
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- CN214471750U CN214471750U CN202022776112.XU CN202022776112U CN214471750U CN 214471750 U CN214471750 U CN 214471750U CN 202022776112 U CN202022776112 U CN 202022776112U CN 214471750 U CN214471750 U CN 214471750U
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- mandrel
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Abstract
The utility model discloses a RV reduction gear base bearing fatigue test platform relates to precision bearing's health monitoring and maintenance field. The fatigue test platform mainly comprises a driving part, a motion control part and a data acquisition part. The driving part of the RV reducer main bearing fatigue test platform mainly comprises: servo motor, servo electric cylinder, shaft coupling, dabber, RV reduction gear main bearing, loading bearing, the motion control part include: host industrial computer, next programmable logic controller, servo driver, data acquisition part include: data acquisition card, acceleration sensor, displacement sensor, temperature sensor. By changing the dynamic load on the mandrel, the test platform can perform fatigue tests on the RV reducer main bearing under different working conditions, records the full life cycle state information of the RV reducer main bearing, and is helpful for analyzing the degeneration mechanism of the RV reducer main bearing and constructing a health model.
Description
Technical Field
The utility model relates to a reliability and maintenance field, especially the utility model relates to a reliability aassessment of RV reduction gear base bearing can monitor and the analysis by RV reduction gear base bearing health status.
Background
The RV reducer has the advantages of small size, strong impact resistance, large torque, high positioning precision, small vibration, large reduction ratio and the like, and is widely applied to industrial robots, machine tools, medical detection equipment and satellite receiving systems. The main bearing of the RV reducer is used as a core functional component of the reducer, and needs to be capable of transmitting a large torque, bearing a large overload impact and ensuring the expected service life. In order to improve the comprehensive performance of the RV reducer in the using process, the reliability of the RV reducer main bearing must be completely evaluated, the running state information of the RV reducer main bearing in the full life cycle under the real working condition is tested, a health state evaluation model is established, and a theoretical basis and actual guidance are provided for the health state monitoring and preventive maintenance of the RV reducer.
In the process of simulating the performance test of the main bearing of the RV reducer in the prior art, different radial loads are often required to be applied to a tested bearing to simulate the couple action of an internal planetary gear, however, bearing test equipment in the prior art can only apply constant pretightening force to the tested bearing in a static state to test and acquire data, or data acquisition during operation of the main bearing is realized in an idle state, due to the lack of test data during operation of the main bearing and the application of dynamic loads, the operation state of the tested bearing under the couple action of the planetary gear under a real working condition cannot be truly simulated, so that the test result and data generated during actual operation of the tested bearing have large difference, the accuracy of the test data is influenced, and a healthy state model of the main bearing of the RV reducer conforming to the real working condition cannot be constructed.
SUMMERY OF THE UTILITY MODEL
1. The purpose of the utility model is to provide a novel water-saving device.
The to-be-solved technical problem of the utility model is that present RV reduction gear reliability platform can't gather the full life cycle state information of reduction gear base bearing under the true operating mode of simulation. The utility model provides a can collect fatigue test platform of full life cycle health status information under simulation RV reduction gear dynamic loading and the adjustable rotational speed condition.
2. The utility model adopts the technical proposal.
The invention provides a fatigue test platform for a main bearing of an RV reducer, which comprises a main bearing driving part, a main bearing loading part, a motion control part and a data acquisition part, wherein the main bearing driving part is connected with the main bearing loading part;
the main bearing driving part comprises a servo motor, a positioning shaft, a fixing screw, a motor seat, a coupler, a core shaft and an RV reducer main bearing; the core shaft is of a left-right split structure and comprises a left core shaft and a right core shaft, the left core shaft and the right core shaft are both provided with outer steps and used for fixing the main bearing inner ring of the RV reducer, and the left core shaft part and the right core shaft part are inserted into the bearing block of the RV reducer in a buckling mode;
the main bearing loading part comprises a servo electric cylinder, a connecting seat, a loading bearing and a loading bearing seat; the two loading bearings are respectively arranged on two sides of the mandrel and are used for applying a dynamic couple of the main bearing of the RV reducer;
the motion control part comprises an upper computer, a lower programmable logic controller and a servo driver, and is used for controlling the rotating speed of a main bearing of the RV reducer and the thrust of the servo electric cylinder;
the data acquisition part comprises a data acquisition card, a vibration sensor and a temperature sensor, and records the running state information of the main bearing of the RV reducer in the test process.
Preferably, the connecting seat is provided with a flexible connecting hole connected with the push rod of the servo electric cylinder and fixedly connected with the servo electric cylinder, and through holes are formed in two sides of the connecting hole of the push rod of the electric cylinder and connected with the loading bearing seat in a threaded mode to transmit thrust.
Preferably, the mandrel is of a split structure and is divided into a left mandrel and a right mandrel; the outer peripheral surface of the mandrel is provided with an outer step for fixing an inner ring of the main bearing of the RV reducer, the center of the mandrel is provided with a positioning hole, and two sides of the mandrel are provided with threaded mounting holes; the positioning shaft enables the split type core shaft to be centered and positioned through the positioning hole, and the fixing screw applies the pre-tightening force of the RV reducer bearing through the threaded mounting hole and realizes rigid connection.
Preferably, the thrust of the servo electric cylinder is transmitted to the mandrel through the loading bearings on the two sides, and the equivalent simulation of the dynamic couple of the planet wheel when the main bearing of the RV reducer runs is carried out.
Preferably, the servo motor is fixed on the motor base through threaded connection, and the motor shaft is flexibly connected with the mandrel through the coupler to drive the mandrel to simulate working conditions at different rotating speeds.
Preferably, the PLC of the motion control part communicates with the upper computer in an uplink direction, controls the rotating speed of the servo motor and adjusts the thrust of the servo electric cylinder, and the PLC is connected with the servo driver in a downlink direction and controls the motion of the servo motor in real time through the encoder.
Preferably, the acceleration sensor of the data acquisition part is fixed on the bearing seat of the RV reducer in a magnetic attraction or bonding mode, and the temperature sensor is fixed on the surface of the outer ring of the main bearing of the RV reducer in a magnetic attraction or bonding mode; the vibration sensor and the temperature sensor are used for acquiring a vibration signal and a temperature signal of the RV reducer main bearing during operation into the upper computer through a data acquisition card, and acquiring, coding and storing the vibration signal and the temperature signal in real time in a LabVIEW interface of the upper computer; the LabVIEW interface of the upper computer can set the characteristics of data acquisition and perform closed-loop control.
3. The utility model discloses produced technological effect.
(1) RV reduction gear base bearing fatigue test platform with servo control system, adopt host computer and next programmable logic controller to realize whole loading and driven closed-loop control to realized RV reduction gear base bearing and received the dynamic simulation of planetary gear alternating force couple effect at the actual motion in-process.
(2) RV reduction gear base bearing fatigue test platform, can gather the health information of the full life cycle of base bearing in real time through vibration sensor and temperature sensor, provide practical basic data for the reliability analysis of whole RV reduction gear, be favorable to the healthy model of RV reduction gear base bearing to establish.
(3) RV reduction gear base bearing fatigue test platform, through the mode of design both sides loading bearing, in the base bearing moving, realized the equivalent loading of the inside alternating couple of base bearing. Meanwhile, the loading force on two sides of the main bearing can be changed through a servo motion control system, and dynamic load application under different working conditions is realized.
Drawings
FIG. 1 is an axonometric projection of a fatigue test platform for a main bearing of an RV reducer.
Fig. 2 is the schematic view of the positioning and locking installation of the mandrel of the present invention.
Fig. 3 is the utility model discloses a RV reduction gear main bearing fatigue test platform's motion control part and partial functional block diagram of data acquisition.
Detailed Description
Example 1
Driving part of main bearing fatigue test platform of RV reducer
Referring to fig. 1 and 2, a driving part of the fatigue test platform for the main bearing of the RV reducer is mainly described, and the driving part consists of a base 1, a fixing screw rod 4, a positioning shaft 5, a main bearing 10 of the RV reducer, a bearing seat 11 of the RV reducer, a left mandrel 20, a right mandrel 12, a coupler 15, a motor seat 16 and a servo motor 17. RV reduction gear bearing frame 11 is fixed on base 1 through hexagon socket nut, RV reduction gear main bearing 10 outer lane is installed in the bearing frame, dabber 12 is similar to the inside planet carrier of RV reduction gear, designs for split type structure, and all the design has outer step for installation RV reduction gear main bearing inner circle. In order to realize the alignment and fixation of the left mandrel part and the right mandrel part, a fixing hole 18 and a centering hole 19 are correspondingly formed in the middle of the mandrels, during assembly, the positioning shaft 5 penetrates through the centering hole to realize the centering and alignment of the left mandrel part and the right mandrel part, then the fixing nut 4 is installed in the installation hole, and the left mandrel part and the right mandrel part are tightened and fixed. The servo motor 17 driving shaft arranged on the motor base 16 is flexibly connected with the mandrel through the coupler 15. When the servo motor operates, torque is transmitted to the mandrel through the coupler, and the mandrel rotates to drive the main bearing of the RV reducer to rotate.
2, loading part of main bearing fatigue test platform of RV reducer
Referring to fig. 1, a loading part of a fatigue test platform of a main bearing of the RV reducer is mainly introduced, and the loading part consists of a servo electric cylinder 2, a connecting seat 3, a first loading bearing 6, a first loading bearing seat 7, a second loading bearing 13 and a second loading bearing seat 14. The loading system is characterized in that the servo electric cylinder 2 provides radial loading force, the fixing is realized through a threaded hole arranged in the middle of the connecting seat 3 and an electric cylinder push rod, countersunk holes are formed in two sides of the connecting seat, and the connecting seat can be fixed to the bottoms of the first loading bearing seat 7 and the second loading bearing seat 14 through hexagon socket head bolts. Furthermore, the loading bearing seats are symmetrically arranged on the left side and the right side of the RV reducer bearing, the first loading bearing 6, the second loading bearing 13 outer ring are installed on the loading bearing seats, and the core shaft is installed on the loading bearing inner ring in an inserting mode. When dynamic loading is carried out, the inner ring of the loading bearing rotates together with the mandrel, and the thrust of the servo electric cylinder is transmitted to the bearing seat through the connecting seat and further transmitted to the loading bearing. The loading bearing applies radial loading forces on both sides to the rotating spindle in a bearing outer ring-ball-bearing inner ring manner. Through the loading mode, the loading effect of the planet carrier in the RV reducer on the alternating couple of the main bearing can be equivalently realized, and the dynamic load condition received by the main bearing in the actual operation of the RV reducer can be more truly simulated.
3, motion control part of RV reducer main bearing fatigue test platform
Referring to fig. 1 and 3, the motion control part includes an upper computer, a lower programmable logic controller PLC, a servo driver, a servo motor, and a servo cylinder. The control instruction of the PLC is compiled by utilizing an upper computer based on a PLC control chart, so that on one hand, the motion control of the variable working condition of the servo motor is realized, and on the other hand, the stroke protection and the origin reset function in the loading process of the main bearing of the RV reducer are realized. The PLC of the upper computer can set different rotating speeds of the servo motor and different loading forces of the servo electric cylinder in a control chart program, the PLC of the upper computer communicates with the programmable logic controller of the lower computer in a USB mode to transmit a control instruction, the PLC transmits the control instruction to the servo driver, the operation state of the servo motor and the dynamic loads on two sides of the main bearing are controlled, and the movement control of the variable working condition of the whole RV reducer main bearing during operation is realized.
4, data acquisition part of RV reducer main bearing fatigue test platform
See fig. 1 and 3. The vibration sensor 8 is fixed on the outer surface of the bearing seat of the RV reducer in a bonding or magnetic attracting mode, and the temperature sensor 9 is fixed on the outer surface of the main bearing ring of the RV reducer in a bonding or magnetic attracting mode. The data acquisition interface is compiled based on LabVIEW, and the acceleration signal acquisition mode can be customized based on test requirements and database standards, such as continuous acquisition or acquisition at time intervals. Based on the performance specification of the data acquisition card, the parameters of the acquisition process, such as the sampling frequency, the sampling period, the sampling length and the like of the vibration signal and the temperature signal, can be customized. After the servo control system is started, the RV reducer main bearing realizes the simulation of different rotating speed working conditions under the action of dynamic alternating couple, and the temperature information of the surface of the outer ring and the vibration state inside the bearing can be collected in the running process of the RV reducer main bearing based on a data acquisition system. Further, the temperature information can reflect the relation between the friction heat and the running time of the main bearing under the condition of dynamic loading, and on the other hand, the vibration signal of the full life cycle can help to monitor abnormal information of the main bearing when the main bearing is worn or peeled and damaged. Through the data acquisition system, two kinds of fatigue data of full life cycle are collected, the health state information of the RV reducer main bearing during real operation can be completely reflected, the health monitoring and model construction of the main bearing are facilitated, and a data base and guidance information are provided for improving the reliability of the RV reducer.
The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.
In the description of the present invention, it is to be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
Claims (7)
1. The utility model provides a RV reduction gear owner bearing fatigue test platform which characterized in that: the device comprises a main bearing driving part, a main bearing loading part, a motion control part and a data acquisition part;
the main bearing driving part comprises a servo motor, a positioning shaft, a fixing screw, a motor seat, a coupler, a core shaft and an RV reducer main bearing; the core shaft is of a left-right split structure and comprises a left core shaft and a right core shaft, the left core shaft and the right core shaft are both provided with outer steps and used for fixing the main bearing inner ring of the RV reducer, and the left core shaft part and the right core shaft part are inserted into the bearing block of the RV reducer in a buckling mode;
the main bearing loading part comprises a servo electric cylinder, a connecting seat, a loading bearing and a loading bearing seat; the two loading bearings are respectively arranged on two sides of the mandrel and are used for applying a dynamic couple of the main bearing of the RV reducer;
the motion control part comprises an upper computer, a lower programmable logic controller and a servo driver, and is used for controlling the rotating speed of a main bearing of the RV reducer and the thrust of the servo electric cylinder;
the data acquisition part comprises a data acquisition card, a vibration sensor and a temperature sensor, and records the running state information of the main bearing of the RV reducer in the test process.
2. The fatigue test platform for the main bearing of the RV reducer according to claim 1, characterized in that: the connecting seat is provided with a flexible connecting hole connected with the push rod of the servo electric cylinder and fixedly connected with the servo electric cylinder, and through holes are formed in two sides of the connecting hole of the push rod of the electric cylinder and connected with the loading bearing seat in a threaded mode to transmit thrust.
3. The fatigue test platform for the main bearing of the RV reducer according to claim 1, characterized in that: the mandrel is of a split structure and is divided into a left mandrel and a right mandrel; the outer peripheral surface of the mandrel is provided with an outer step for fixing an inner ring of the main bearing of the RV reducer, the center of the mandrel is provided with a positioning hole, and two sides of the mandrel are provided with threaded mounting holes; the positioning shaft enables the split type core shaft to be centered and positioned through the positioning hole, and the fixing screw applies the pre-tightening force of the RV reducer bearing through the threaded mounting hole and realizes rigid connection.
4. The fatigue test platform for the main bearing of the RV reducer according to claim 1, characterized in that: and transmitting the thrust of the servo electric cylinder to the mandrel through the loading bearings on the two sides, and performing equivalent simulation on a dynamic couple of the planet wheel when the main bearing of the RV reducer runs.
5. The fatigue test platform for the main bearing of the RV reducer according to claim 1, characterized in that: the servo motor is fixed on the motor base through threaded connection, and the motor shaft is flexibly connected with the mandrel through the coupler to drive the mandrel to simulate working conditions at different rotating speeds.
6. The fatigue test platform for the main bearing of the RV reducer according to claim 1, characterized in that: the PLC of the motion control part is communicated with the upper computer in the uplink direction, controls the rotating speed of the servo motor and adjusts the thrust of the servo electric cylinder, and the PLC is connected with the servo driver in the downlink direction and controls the motion of the servo motor in real time through the encoder.
7. The fatigue test platform for the main bearing of the RV reducer according to claim 1, characterized in that: the acceleration sensor of the data acquisition part is fixed on the bearing seat of the RV reducer in a magnetic attraction or bonding mode, and the temperature sensor is fixed on the surface of the outer ring of the main bearing of the RV reducer in a magnetic attraction or bonding mode; and the vibration sensor and the temperature sensor acquire vibration signals and temperature signals of the RV reducer main bearing during operation into the upper computer through a data acquisition card.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022776112.XU CN214471750U (en) | 2020-11-26 | 2020-11-26 | Fatigue test platform for main bearing of RV reducer |
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| CN202022776112.XU CN214471750U (en) | 2020-11-26 | 2020-11-26 | Fatigue test platform for main bearing of RV reducer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526911A (en) * | 2022-02-28 | 2022-05-24 | 河南科技大学 | Testing machine for testing bearing capacity of RV reducer main shaft |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114526911A (en) * | 2022-02-28 | 2022-05-24 | 河南科技大学 | Testing machine for testing bearing capacity of RV reducer main shaft |
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