CN109932164B - Axial and radial force loading device for rotating shaft system - Google Patents
Axial and radial force loading device for rotating shaft system Download PDFInfo
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- CN109932164B CN109932164B CN201910148418.XA CN201910148418A CN109932164B CN 109932164 B CN109932164 B CN 109932164B CN 201910148418 A CN201910148418 A CN 201910148418A CN 109932164 B CN109932164 B CN 109932164B
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Abstract
The invention provides an axial radial force loading device for a rotating shaft system, which comprises: the device comprises four parts, namely an auxiliary loading unit, a radial force loading unit, an axial force loading unit and a propelling device unit. The auxiliary loading unit is connected with the loading shaft through a bearing, the bearing seat is connected with the bearing, the radial force loading unit can realize loading and unloading of radial force through the matching of the propelling device unit and the radial loading plate, and the radial force sensor is used for measuring the radial loading force; the axial force loading unit can realize the loading and unloading of the axial force through the matching of the loading device and the swing arm mechanism, and the axial force sensor is used for measuring the axial force. The axial force and radial force loading device is simple and symmetrical in structure, easy to realize modularization, adjustable in load range and high in loading precision, and is economical and efficient.
Description
Technical Field
The invention belongs to the field of rotating shafts, and particularly relates to a force loading device applied to reliability monitoring of a rotating shaft system.
Background
The rotating shaft system is a key component of the machine tool. The machine tool rotating shaft system refers to a shaft on a machine tool which drives a workpiece or a cutter to rotate, and generally comprises a rotating shaft system component, a bearing, a transmission component and the like, and is mainly used for supporting power transmission parts in the machine, such as gears, belt wheels and the like. The rotating shaft system transmits power and various loads, and the running state of the rotating shaft system influences the performance of the whole unit. When the rotating shaft system operates, a lot of information is expressed by vibration signals, temperature signals and the like. For example, the fault of a bearing of a rotating shafting of the machine tool and the eccentricity of the rotating shafting can be reflected by the measurement and analysis of vibration signals; the temperature of the rotating shaft system exceeds the allowable range, and the processing precision of the machine tool is seriously influenced. At present, a vibration signal monitoring method corresponding to a rotary shaft system is relatively lacked in China. The sensor laying and vibration signal acquisition of the rotary shaft system are realized by utilizing the vibration sensor and the detection instrument, the acquired signals are analyzed, and data support is provided for fault analysis of the rotary shaft system.
Disclosure of Invention
Aiming at the problems, the invention aims to provide an axial and radial force loading device for a rotating shaft system, which adopts a hydraulic loading scheme to improve the accuracy and stability of loading force, optimizes the problems of friction force increase and difficulty in calculation caused by vertical loading of the original radial force, and adopts horizontal loading to reduce the friction force as far as possible so as to improve the accuracy of the loading force.
In order to achieve the purpose, the invention adopts the technical scheme that: an axial and radial force loading device for a rotating shaft system comprises an auxiliary loading unit, a radial force loading unit, an axial force loading unit and a propelling device unit 6;
the auxiliary loading unit is connected with a loading shaft, namely a rotating shaft system, through an internal bearing, and is used for positioning on the rotating shaft system; the radial force loading unit is matched with the radial loading plate through the propelling device unit to realize loading and unloading of radial force, and a radial force sensor is adopted to measure the radial loading force; the axial force loading unit realizes the loading and unloading of the axial force through the matching of the loading device and the swing arm mechanism, and an axial force sensor is adopted to measure the axial force.
Further, the auxiliary loading unit (the auxiliary loading unit is positioned on the rotation axis) includes: a bearing bush module 3 and a platform 4; the bearing bush module 3 is placed on the platform 4, and the brake 2 is connected with the bearing bush module 3; the bearing housing module 3 includes: the bearing comprises a rotating shaft system 31, a bearing sleeve left end cover 32, a bearing sleeve right end cover 37, a screw 35, a bearing sleeve 36, a left bearing 33 and a right bearing 34; the left bearing 33 and the right bearing 34 are arranged on the rotating shaft system 31 through steps, and a bearing sleeve left end cover 32 and a bearing sleeve right end cover 37 are locked in a bearing sleeve 36 through screws 35.
Further, the propulsion unit 6 includes: the hinge module, the hydraulic module and the elastic device module; the hinge module includes: the hinge module comprises a base plate 61, a fixed seat 62, a hinge 63 and a connecting plate 64, wherein the base plate 61 is positioned at the lowest part and is fixed on the platform 4, one end of the hinge 63 is fixed on the base plate 61 through the fixed seat 62, the movable end of the hinge 63 is fixed on the connecting plate 64, and the connecting plate 64 is connected with a connecting rod 65 through a screw to form a hinge module;
the hydraulic module includes: the connecting rod 65, the servo valve 66, the servo oil cylinder 69, the rolling seat 67, an oil cylinder front sleeve 615, an oil cylinder connecting sleeve 616, an oil cylinder rear sleeve 614, a concave semicircular platform 613 and a piston rod 610; the connecting rod 65 is connected with an oil cylinder front sleeve 615, an oil cylinder rear sleeve 614 and an oil cylinder connecting sleeve 616 in series, and the oil cylinder front sleeve 615 and the oil cylinder rear sleeve 614 are connected together through screws and are fixed on the connecting rod 65 through screws; the connecting rod 65 is placed on the rolling seat 67, the rolling seat 67 is placed on the concave semicircular platform 613, the rebound compensation device 68 is arranged below the concave semicircular platform 613, the piston rod 610 is arranged in the servo oil cylinder 69, and the right end of the piston rod is connected with the elastic device module 611 to form a hydraulic module.
Further, the right end of the elastic device module 611 is welded with a top rod 614, and the top rod 614 is loaded with a force sensor 612; the elastic means module 611 includes: the hydraulic module comprises a left plate 6112, a right plate 6111, a transverse guide post 6113 and a spring 6114, wherein the tail end of the transverse guide post 6113 is welded on the right plate 6111, two sides of the transverse guide post 6113 are respectively sleeved with one spring 6114, a unthreaded hole in the left plate 6112 penetrates through the guide post and is pressed on the spring 6114, and the other surface of the unthreaded hole is welded with a piston rod 610 of the hydraulic module.
Further, the springback compensation device 68 includes: an upper base plate 681, a lower base plate 682, a vertical guide post 683 spring 684, four vertical guide posts 683, and an upper base plate 681, wherein the four springs 684 are sleeved on the vertical guide posts 683.
Further, the radial force loading unit includes: a first propulsion unit, which is connected to the contact plate 5 and bears against the bearing housing unit 3, and a contact plate 5;
the axial force loading unit comprises: the second propulsion unit is a swing arm 7, and the second propulsion unit 6 is connected with the swing arm 7; the swing arm 7 includes: the single swing arm 71, the swing seat 72 and the swing arm connecting plate 73 are hinged on the swing seat 72, and the swing arm connecting plate 73 is connected with the two single swing arms 71 through four screws.
Preferably, the connection between the swing arm connecting plate 73 and the top rod 614 in the swing arm 7 is a hemispherical groove.
Preferably, the joint of the single swing arm 71 in the swing arm 7 and the right end cover 37 of the bearing sleeve is in a planar cylindrical point contact.
Preferably, the contact plate 5 is in point contact with the bearing sleeve 36 in a cylindrical plane.
The invention has the following beneficial effects:
compared with the prior art, the invention has the advantages that the original manual loading method is optimized, the accuracy and the stability of the loading force are improved by adopting a hydraulic loading scheme, and the stress of the hydraulic cylinder is analyzed; the problem of friction force increase caused by original radial force vertical loading is optimized, and the friction force is reduced as much as possible by adopting horizontal loading to improve the accuracy of the loading force.
Drawings
FIG. 1 is a general assembly view of an axial radial force loading device;
FIG. 2 is an enlarged detail view of the propulsion unit;
FIG. 3 is an enlarged detail view of the spring assembly module;
FIG. 4 is an enlarged detail view of the rebound compensation device;
FIG. 5 is a half sectional view of a bearing housing module;
FIG. 6 is a semi-sectional engineering view of a bearing housing module;
FIG. 7 is an enlarged detail view of the swing arm;
wherein in FIG. 1: 1-motor, 2-brake, 3-bearing sleeve unit, 4-platform, 5-contact plate, 6-loading device and 7-swing arm.
Detailed Description
The technical solution of the present invention will now be fully described with reference to fig. 1-7. The following description is merely exemplary of some, but not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art without any inventive step are within the scope of the present invention.
The invention provides an axial and radial force loading device for a rotating shaft system, which comprises an auxiliary loading unit, a radial force loading unit, an axial force loading unit and a propelling device unit 6.
Assembling a bearing sleeve 3: the left bearing 35 and the right bearing 34 are arranged on the rotating shaft system 31 through steps, and the two ends of the bearing sleeve left end cover 112 and the bearing sleeve right end cover 116 are locked in the bearing sleeve 36 by screws 35.
The auxiliary loading unit comprises: the bearing housing unit 3 is connected with the brake 2, and the bearing housing unit 3 is placed on the platform 4. The auxiliary loading unit is positioned through a stepped hole on the main shaft, and the brake 2 and the motor 3 are connected with two ends of the main shaft. The main shaft can be an asynchronous motor or an electric main shaft matched with a mechanical main shaft, and the brake can be an eddy current brake or a hydraulic dynamometer.
Specifically, the positioning of the auxiliary loading unit on the rotation axis includes: a bearing bush module 3 and a platform 4; the bearing bush module 3 is placed on the platform 4, and the brake 2 is connected with the bearing bush module 3; the bearing housing module 3 includes: the bearing comprises a rotating shaft system 31, a bearing sleeve left end cover 32, a bearing sleeve right end cover 37, a screw 35, a bearing sleeve 36, a left bearing 33 and a right bearing 34; the left bearing 33 and the right bearing 34 are arranged on the rotating shaft system 31 through steps, a bearing sleeve 36 is internally locked with a bearing sleeve left end cover 32 and a bearing sleeve right end cover 37 through screws 35, and two ends of the bearing sleeve are fixed.
Further, the propulsion unit 6 includes: the hinge module, the hydraulic module and the elastic device module; the hinge module includes: the hinge module comprises a base plate 61, a fixed seat 62, a hinge 63 and a connecting plate 64, wherein the base plate 61 is positioned at the lowest part and is fixed on the platform 4, one end of the hinge 63 is fixed on the base plate 61 through the fixed seat 62, the movable end of the hinge 63 is fixed on the connecting plate 64, and the connecting plate 64 is connected with a connecting rod 65 through a screw to form a hinge module;
the hydraulic module includes: the connecting rod 65, the servo valve 66, the servo oil cylinder 69, the rolling seat 67, an oil cylinder front sleeve 615, an oil cylinder connecting sleeve 616, an oil cylinder rear sleeve 614, a concave semicircular platform 613 and a piston rod 610; the connecting rod 65 is connected with an oil cylinder front sleeve 615, an oil cylinder rear sleeve 614 and an oil cylinder connecting sleeve 616 in series, and the oil cylinder front sleeve 615 and the oil cylinder rear sleeve 614 are connected together through screws and are fixed on the connecting rod 65 through screws; the connecting rod 65 is placed on the rolling seat 67, the rolling seat 67 is placed on the concave semicircular platform 613, the rebound compensation device 68 is arranged below the concave semicircular platform 613, the piston rod 610 is arranged in the servo oil cylinder 69, and the right end of the piston rod is connected with the elastic device module 611 to form a hydraulic module.
Further, the right end of the elastic device module 611 is welded with a top rod 614, and the top rod 614 is loaded with a force sensor 612; the elastic means module 611 includes: the hydraulic module comprises a left plate 6112, a right plate 6111, a transverse guide post 6113 and a spring 6114, wherein the tail end of the transverse guide post 6113 is welded on the right plate 6111, two sides of the transverse guide post 6113 are respectively sleeved with one spring 6114, a unthreaded hole in the left plate 6112 penetrates through the guide post and is pressed on the spring 6114, and the other surface of the unthreaded hole is welded with a piston rod 610 of the hydraulic module.
The propulsion device 6 is assembled: the backing plate 61 is welded with the fixed seat 62, the hinge 63 is installed on the hinge seat of the fixed seat 62, the hinge 63 is welded with the connecting plate 64, and the connecting plate 64 is connected with the connecting rod 65 through four screws. The connecting rod is connected with a front cylinder sleeve 615, a rear cylinder sleeve 614 and a cylinder connecting sleeve 616 in series to connect the front cylinder sleeve 615 and the rear cylinder sleeve 614 together through four screws and fixed on a connecting rod 65 through the four screws, the connecting rod 65 is placed on the rolling seat 67, the rolling seat 67 is placed on the concave semicircular platform 613, a rebound compensation device 68 is arranged below the concave semicircular platform 613, a piston rod 610 is arranged in a servo cylinder 69 and connected with an elastic device 611, the elastic device 611 is welded with a push rod 614, and the push rod 614 is provided with a loading force sensor 612.
Further, the springback compensation device 68 includes: an upper base plate 681, a lower base plate 682, a vertical guide post 683 spring 684, four vertical guide posts 683, and an upper base plate 681, wherein the four springs 684 are sleeved on the vertical guide posts 683.
Further, the radial force loading unit includes: a first propulsion unit, which is connected to the contact plate 5 and bears against the bearing housing unit 3, and a contact plate 5;
the axial force loading unit comprises: the second propulsion unit is a swing arm 7, and the second propulsion unit 6 is connected with the swing arm 7; the swing arm 7 includes: the single swing arm 71, the swing seat 72 and the swing arm connecting plate 73 are hinged on the swing seat 72, and the swing arm connecting plate 73 is connected with the two single swing arms 71 through four screws.
And (3) assembling a swing arm 7: the two single swing arms 71 are hinged on the swing seat 72, and the swing arm connecting plate 73 is connected with the two single swing arms 71 through four screws.
The propelling device 6 and the swing arm 7 are connected to form an axial force loading unit. The propulsion device 6 is connected with the contact plate 5 and is abutted against the bearing sleeve unit to form a radial force loading unit.
The device is divided into axial loading and radial loading during the experiment. All the horizontal loading is carried out, and when the radial loading is carried out, the servo oil cylinder 69 pushes the piston rod 610 to transmit elastic means 611 for protection to push the contact plate 5 to carry out the loading of radial force. The same propulsion device 6 transmits a force component in the axial direction to the bearing housing unit 3 via the swing arm 7. The magnitude of the force transmitted to the loading shaft 111 is calculated according to the conversion relation of the distance between the two ends of the lever, the magnitude of the force is displayed on a computer through the output signal of the force sensor 612, and the magnitude of the loading force can be known by subtracting the friction force f = uN of the platform 4 to the bearing sleeve unit 3 due to horizontal loading.
The device adopts a swing arm 7 mechanism which rotates along the vertical direction for axial force loading, so that the force borne by the auxiliary loading unit is horizontal, namely parallel to the axis of a rotating shaft system; and a flat plate is contacted with the cylindrical auxiliary loading unit in the horizontal direction, and the tangency between the flat plate and a circle is utilized to ensure that the radial force points to the circle center. A platform 4 is added under the auxiliary loading unit to balance the deadweight effect. And a plane roller bearing can be added between the auxiliary loading unit and the platform 4 for balancing self weight, so that the friction force is reduced as much as possible. The front end of the piston rod 610 is made into a hemispherical shape, the swing arm connecting plate 73 in contact with the ejector rod 614 is made into a hemispherical groove, and the hinge 63 is matched, so that the whole loading device forms a two-force rod structure, the stress of the loading rod is parallel to the axis, the generation of overturning moment is avoided, the stability of the loading device is improved, and the service life of the hydraulic cylinder is prolonged.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the foregoing description only for the purpose of illustrating the principles of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims, specification and equivalents thereof.
Claims (5)
1. An axial and radial force loading device for a rotating shaft system is characterized by comprising an auxiliary loading unit, a radial force loading unit, an axial force loading unit and a propelling device unit (6);
the auxiliary loading unit is connected with a loading shaft, namely a rotating shaft system, through an internal bearing, and is used for positioning on the rotating shaft system; the radial force loading unit is matched with the radial loading plate through the propelling device unit to realize loading and unloading of radial force, and a radial force sensor is adopted to measure the radial loading force; the axial force loading unit realizes the loading and unloading of the axial force by the matching of the propelling device unit and the swing arm mechanism, and an axial force sensor is adopted to measure the axial force;
the propulsion device unit (6) comprises: the hinge module, the hydraulic module and the elastic device module; the hinge module includes: the hinge module comprises a base plate (61), a fixed seat (62), a hinge (63) and a connecting plate (64), wherein the base plate (61) is located at the lowest part and is fixed on a platform (4), one end of the hinge (63) is fixed on the base plate (61) through the fixed seat (62), the movable end of the hinge (63) is fixed on the connecting plate (64), and the connecting plate (64) is connected with a connecting rod (65) through a screw to form a hinge module;
the hydraulic module includes: the device comprises a connecting rod (65), a servo valve (66), a servo oil cylinder (69), a rolling seat (67), an oil cylinder front sleeve (615), an oil cylinder connecting sleeve (616), an oil cylinder rear sleeve (614), a concave semi-circular table (613) and a piston rod (610); the connecting rod (65) is connected with the oil cylinder front sleeve (615) in series, the oil cylinder rear sleeve (614) in series, the oil cylinder front sleeve (615) and the oil cylinder rear sleeve (614) are connected together through the oil cylinder connecting sleeve (616) in a screw mode and are fixed on the connecting rod (65) through screws; the connecting rod (65) is placed on the rolling seat (67), the rolling seat (67) is placed on the concave semi-circular table (613), the rebound compensation device (68) is arranged below the concave semi-circular table (613), the piston rod (610) is arranged in the servo oil cylinder (69), and the right end of the piston rod is connected with the elastic device module (611) to form a hydraulic module;
the right end of the elastic device module (611) is welded with the ejector rod (614), and the ejector rod (614) is loaded with the force sensor (612); the resilient device module (611) comprises: the hydraulic module comprises a left plate (6112), a right plate (6111), a transverse guide post (6113) and a spring (6114), wherein the tail end of the transverse guide post (6113) is welded on the right plate (6111), two sides of the transverse guide post are respectively sleeved with the spring (6114), a unthreaded hole in the left plate (6112) penetrates through the guide post and is pressed on the spring (6114), and the other side of the unthreaded hole is welded with a piston rod (610) of the hydraulic module;
the radial force loading unit comprises: a first propulsion unit and a contact plate (5), the first propulsion unit being connected to the contact plate (5) and abutting against the bearing sleeve unit (3);
the axial force loading unit comprises: a second propulsion unit, a swing arm (7), the second propulsion unit (6) being connected to the swing arm (7); the swing arm (7) comprises: the swing arm connecting plate (73) is connected with the two single swing arms (71) through four screws;
the springback compensation device (68) comprises: the spring type steel plate spring pile comprises an upper base plate (681), a lower base plate (682), vertical guide pillars (683), four vertical guide pillars (683), an upper base plate (681), and four springs (684) sleeved on the vertical guide pillars (683).
2. The axial and radial force loading device for the rotating shaft system as claimed in claim 1, wherein the auxiliary loading unit comprises: a bearing bush module (3) and a platform (4); the bearing sleeve module (3) is placed on the platform (4), and the brake (2) is connected with the bearing sleeve module (3); the bearing housing module (3) comprises: the bearing comprises a rotating shaft system (31), a bearing sleeve left end cover (32), a bearing sleeve right end cover (37), a screw (35), a bearing sleeve (36), a left bearing (33) and a right bearing (34); the left bearing (33) and the right bearing (34) are arranged on the rotating shaft system (31) through steps, and a left end cover (32) and a right end cover (37) of the bearing sleeve are locked in the bearing sleeve (36) through screws (35).
3. The axial and radial force loading device for the rotating shaft system as claimed in claim 1, wherein the connection between the swing arm connecting plate (73) and the jacking rod (614) in the swing arm (7) is a hemispherical groove.
4. The axial and radial force loading device for the rotating shaft system as claimed in claim 1, wherein the joint of the single swing arm (71) in the swing arm (7) and the right end cover (37) of the bearing housing is a planar cylindrical point contact.
5. An axial and radial force loading device for a rotating shaft system as claimed in claim 1, characterized in that the connection between the contact plate (5) and the bearing housing (36) is a point contact with a cylindrical plane.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910148418.XA CN109932164B (en) | 2019-02-28 | 2019-02-28 | Axial and radial force loading device for rotating shaft system |
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| CN201910148418.XA CN109932164B (en) | 2019-02-28 | 2019-02-28 | Axial and radial force loading device for rotating shaft system |
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| CN109932164B true CN109932164B (en) | 2020-10-20 |
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| CN114894473B (en) * | 2022-03-29 | 2023-09-22 | 洛阳轴承研究所有限公司 | Testing device for main shaft system of wind power generation equipment |
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| CN103115774A (en) * | 2013-01-21 | 2013-05-22 | 中国航天科技集团公司第五研究院第五一〇研究所 | Axial and radial combined loading bearing test device |
| CN104006957A (en) * | 2014-06-17 | 2014-08-27 | 吉林大学 | Contact-type reliability test bed capable of conducting mixed loading on electric main shaft |
| CN206378289U (en) * | 2016-05-18 | 2017-08-04 | 南京航空航天大学 | A kind of force loading device for rotary axis |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102005048746B3 (en) * | 2005-10-10 | 2007-02-15 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Method of testing rail vehicle wheels and axles by simulating the operating stress on the wheel |
| CN103940600B (en) * | 2014-04-16 | 2016-05-04 | 大连理工大学 | A kind of cover gear coupling device for testing stiffness and method |
| CN205300929U (en) * | 2015-11-25 | 2016-06-08 | 吉林大学 | Simulate electric main shaft reliability test device of sound attitude cutting force on line |
| CN105865779B (en) * | 2016-05-18 | 2018-04-17 | 南京航空航天大学 | A kind of force loading device for rotary axis |
| CN108680357A (en) * | 2018-06-25 | 2018-10-19 | 南京航空航天大学 | A kind of axial and radial comprehensive dynamic stiffness measurement device of rolling bearing |
| CN109100145B (en) * | 2018-08-20 | 2020-07-03 | 吉林大学 | Simulation loading and reliability test device for high-power electric spindle |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103115774A (en) * | 2013-01-21 | 2013-05-22 | 中国航天科技集团公司第五研究院第五一〇研究所 | Axial and radial combined loading bearing test device |
| CN104006957A (en) * | 2014-06-17 | 2014-08-27 | 吉林大学 | Contact-type reliability test bed capable of conducting mixed loading on electric main shaft |
| CN206378289U (en) * | 2016-05-18 | 2017-08-04 | 南京航空航天大学 | A kind of force loading device for rotary axis |
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