CN114345676B - Continuously adjustable eccentric vibration exciter - Google Patents

Continuously adjustable eccentric vibration exciter Download PDF

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Publication number
CN114345676B
CN114345676B CN202210025833.8A CN202210025833A CN114345676B CN 114345676 B CN114345676 B CN 114345676B CN 202210025833 A CN202210025833 A CN 202210025833A CN 114345676 B CN114345676 B CN 114345676B
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China
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eccentric
base body
continuously adjustable
rotating shaft
eccentric mass
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CN114345676A (en
Inventor
黄勇
刘锋
李善乐
马瑾
于魁龙
冯辅周
张丽霞
张少亮
胡浩
田钦文
宋超
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Academy of Armored Forces of PLA
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Academy of Armored Forces of PLA
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Abstract

The continuously adjustable eccentric vibration exciter comprises a disc-shaped eccentric base body, the eccentric base body is arranged on a rotating shaft, a plurality of pairs of threaded holes are radially arranged on the circumferential surface of the eccentric base body, an eccentric mass rod is rotatably arranged in each threaded hole through threaded connection, the outer end of each eccentric mass rod is connected with a nut, a pressure spring is sleeved on each eccentric mass rod, one inward end of each pressure spring abuts against the circumferential surface of the eccentric base body, and one outward end of each pressure spring abuts against the corresponding nut. The continuously adjustable eccentric vibration exciter can continuously adjust the eccentric distance, can generate continuously adjustable exciting force to obtain continuously adjustable exciting force amplitude, can be applied to vibration tests in the mechanical fields of vehicles, machine tools and the like, and particularly can be used for carrying out vibration response test analysis, fatigue tests and vibration aging treatment of parts.

Description

Continuously adjustable eccentric vibration exciter
Technical Field
The invention relates to a continuously adjustable eccentric vibration exciter.
Background
Vibration exciters (vibration exciters) are devices attached to some machines and equipment to generate exciting force, and are important parts using mechanical vibration. The vibration exciter can make the excited object obtain a certain form and magnitude of vibration quantity, so as to make vibration and strength test for object or make calibration for vibration testing instrument and sensor. The vibration exciter can also be used as an exciting part to form a vibrating machine for realizing the work of conveying, screening, compacting and molding materials or objects, tamping soil gravels and the like. The vibration exciters are classified into inertial type, electrodynamic type, electromagnetic type, electrohydraulic type, pneumatic type, and hydraulic type according to the excitation type. The exciter can generate unidirectional or multidirectional, simple harmonic or non-simple harmonic exciting force.
The inertial vibration exciter, i.e. mechanical vibration exciter, utilizes the rotation of eccentric block to produce required exciting force.
The mechanical vibration exciter generates exciting force by utilizing centrifugal inertia force caused by mass unbalance when an eccentric wheel rotates. The amplitude of the exciting force of the mechanical vibration exciter is determined by the rotating speed omega n of the eccentric wheel, the eccentricity e and the eccentric mass m. The rotating speed of the eccentric wheel is determined by the rotating speed of the driving motor, the eccentricity is generally only fixed at a plurality of positions, and the eccentric mass block is also only provided with a plurality of blocks. Therefore, it is difficult to obtain a continuously adjustable excitation force amplitude when using a mechanical vibration exciter due to the limitations of eccentricity adjustment and eccentric mass replacement. Therefore, the invention provides a mechanical vibration exciter capable of continuously adjusting eccentricity, and the requirement for obtaining continuously adjustable exciting force amplitude is particularly necessary.
Disclosure of Invention
The invention aims to provide a continuously adjustable eccentric vibration exciter which can continuously adjust the eccentric distance, can generate continuously adjustable exciting force so as to obtain continuously adjustable exciting force amplitude, can be applied to vibration tests in the mechanical field of vehicles, machine tools and the like, and particularly can carry out vibration response test analysis, fatigue test and vibration aging treatment on parts.
The invention relates to a continuously adjustable eccentric vibration exciter, which comprises a disk-shaped eccentric base body, wherein the eccentric base body is arranged on a rotating shaft, a plurality of pairs of threaded holes are arranged on the circumferential surface of the eccentric base body along the radial direction, an eccentric mass rod is respectively and rotatably arranged in each threaded hole through threaded connection, the outer end of each eccentric mass rod is respectively connected with a nut, a pressure spring is respectively sleeved on each eccentric mass rod, one inward end of each pressure spring is respectively propped against the circumferential surface of the eccentric base body, one outward end of each pressure spring is respectively propped against the corresponding nut, by screwing a certain eccentric mass rod into the direction of the rotation center of the rotating shaft by the set distance x1 and screwing the eccentric mass rod opposite to the eccentric mass rod out of the direction away from the rotation center of the rotating shaft by the set distance x2, the eccentric exciter can generate an eccentricity e, and the eccentricity e can be continuously adjusted by adjusting x1 and x 2.
Preferably, the number of the eccentric mass rods is 2 or 4 or 6 or 8 or 10 or 12, and the eccentric mass rods are made of steel.
Preferably, the eccentric base body is installed in the middle of the rotating shaft through a flat key or a spline, two ends of the rotating shaft are respectively sleeved with a bearing, and the eccentric base body and the rotating shaft are made of steel.
Preferably, the nut is a hexagonal nut or a square nut.
The invention relates to a continuously adjustable eccentric vibration exciter, which comprises a disk-shaped eccentric base body, wherein the eccentric base body is arranged on a rotating shaft, a plurality of pairs of threaded holes are arranged on the circumferential surface of the eccentric base body along the radial direction, an eccentric mass rod is respectively and rotatably arranged in each threaded hole through threaded connection, the outer end of each eccentric mass rod is respectively connected with a nut, a pressure spring is respectively sleeved on each eccentric mass rod, one inward end of each pressure spring is respectively propped against the circumferential surface of the eccentric base body, and one outward end of each pressure spring is respectively propped against the corresponding nut. When the eccentric mass rod is used, an eccentric distance e can be generated by screwing an eccentric mass rod into a set distance x1 towards the rotating center direction of the rotating shaft and screwing an eccentric mass rod opposite to the eccentric mass rod out of the set distance x2 away from the rotating center direction of the rotating shaft, and the eccentric distance e can be continuously adjusted by adjusting x1 and x 2. Therefore, the continuously adjustable eccentric vibration exciter has the characteristics of continuously adjusting the eccentric distance, generating continuously adjustable exciting force to obtain continuously adjustable exciting force amplitude, being applied to vibration tests in the mechanical fields of vehicles, machine tools and the like, and particularly developing vibration response test analysis, fatigue tests and vibration aging treatment of parts.
The continuously adjustable eccentric vibration exciter of the present invention will be further described with reference to the accompanying drawings.
Drawings
Fig. 1 is a front view of a continuously adjustable eccentric exciter according to the present invention;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a top view of FIG. 1;
fig. 4 is a perspective view of the continuously adjustable eccentric exciter of the present invention.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the continuously adjustable eccentric vibration exciter of the present invention includes a disk-shaped eccentric base 1, the eccentric base 1 is mounted on a rotating shaft 2, a plurality of pairs of screw holes 3 are radially formed on a circumferential surface of the eccentric base 1, an eccentric mass rod 4 is rotatably mounted in each screw hole 3 through screw connection, a nut 5 is connected to an outer end of each eccentric mass rod 4, a compression spring 6 is respectively sleeved on each eccentric mass rod 4, an inward end of each compression spring 6 is respectively pressed against the circumferential surface of the eccentric base 1, an outward end of each compression spring 6 is respectively pressed against a corresponding nut 5, by screwing one eccentric mass rod 4 into a set distance x1 toward a rotating center direction of the rotating shaft 2 and screwing the eccentric mass rod 4 opposite to the eccentric mass rod 4 out of the set distance x2 toward a rotating center direction away from the rotating shaft 2, the eccentric exciter can generate an eccentricity e, and the eccentricity e can be continuously adjusted by adjusting x1 and x 2.
As a further improvement of the present invention, the number of the eccentric mass bars 4 is 2, 4, 6, 8, 10 or 12, and the eccentric mass bars 4 are made of steel.
As a further improvement of the invention, the eccentric base body 1 is arranged in the middle of the rotating shaft 2 through a flat key or a spline, two ends of the rotating shaft 2 are respectively sleeved with a bearing 7, and the eccentric base body 1 and the rotating shaft 2 are made of steel.
As a further improvement of the present invention, the nut 5 is a hexagonal nut or a square nut.
The invention relates to a continuously adjustable eccentric vibration exciter, which comprises a disc-shaped eccentric base body 1, wherein the eccentric base body 1 is arranged on a rotating shaft 2, a plurality of pairs of threaded holes 3 are arranged on the circumferential surface of the eccentric base body 1 along the radial direction, an eccentric mass rod 4 is respectively screwed in each threaded hole 3 through threaded connection, the outer end of each eccentric mass rod 4 is respectively connected with a nut 5, a pressure spring 6 is respectively sleeved on each eccentric mass rod 4, one inward end of each pressure spring 6 is respectively propped against the circumferential surface of the eccentric base body 1, and one outward end of each pressure spring 6 is respectively propped against the corresponding nut 5. In use, the eccentric exciter can generate the eccentricity e by screwing a certain eccentric mass rod 4 into the direction of the rotation center of the rotating shaft 2 by the set distance x1 and screwing the eccentric mass rod 4 opposite to the eccentric mass rod 4 out of the direction away from the rotation center of the rotating shaft 2 by the set distance x2, and the eccentricity e can be continuously adjusted by adjusting x1 and x 2. Therefore, the continuously adjustable eccentric vibration exciter has the characteristics of continuously adjusting the eccentric distance, generating continuously adjustable exciting force to obtain continuously adjustable exciting force amplitude, being applied to vibration tests in the mechanical fields of vehicles, machine tools and the like, and particularly developing vibration response test analysis, fatigue tests and vibration aging treatment of parts.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.

Claims (4)

1. Continuous adjustable eccentric vibration exciter, its characterized in that: the eccentric mass rod mechanism comprises a disc-shaped eccentric base body (1), the eccentric base body (1) is arranged on a rotating shaft (2), a plurality of pairs of threaded holes (3) are formed in the circumferential surface of the eccentric base body (1) along the radial direction, eccentric mass rods (4) are respectively screwed in each threaded hole (3) through threaded connection, the outer ends of the eccentric mass rods (4) are respectively connected with a nut (5), a pressure spring (6) is sleeved on each eccentric mass rod (4), one inward end of each pressure spring (6) is respectively propped against the circumferential surface of the eccentric base body (1), one outward end of each pressure spring (6) is respectively propped against the corresponding nut (5), a certain eccentric mass rod (4) is screwed into a set distance x1 in the rotating center direction of the rotating shaft (2), and the eccentric mass rod (4) opposite to the eccentric mass rod (4) is screwed out of a set distance x2 in the rotating center direction far away from the rotating shaft (2), the eccentric exciter can generate an eccentricity e, and the eccentricity e can be continuously adjusted by adjusting x1 and x 2.
2. The continuously adjustable eccentric vibration exciter of claim 1, wherein: the number of the eccentric mass rods (4) is 2 or 4 or 6 or 8 or 10 or 12, and the eccentric mass rods (4) are made of steel.
3. The continuously adjustable eccentric vibration exciter of claim 2, wherein: the eccentric base body (1) is installed in the middle of the rotating shaft (2) through a flat key or a spline, two ends of the rotating shaft (2) are respectively sleeved with a bearing (7), and the eccentric base body (1) and the rotating shaft (2) are made of steel.
4. A continuously adjustable eccentric vibration exciter according to claim 3, wherein: the nut (5) is a hexagonal nut or a square nut.
CN202210025833.8A 2022-01-11 2022-01-11 Continuously adjustable eccentric vibration exciter Active CN114345676B (en)

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CN202210025833.8A CN114345676B (en) 2022-01-11 2022-01-11 Continuously adjustable eccentric vibration exciter

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CN114345676B true CN114345676B (en) 2022-09-16

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794165A (en) * 1971-03-17 1974-02-26 Midwestern Ind Inc Motion control for a material separator
US4348912A (en) * 1979-08-21 1982-09-14 Thomas Hubert E Variable amplitude vibrator apparatus
FR2577826A1 (en) * 1984-02-23 1986-08-29 Zavody Tezkeho Strojirenstvi Vibration generator with infinitely adjustable eccentric torque
CN101049675A (en) * 2007-05-11 2007-10-10 常州宝菱重工机械有限公司 Eccentric shaft with adjustable eccentricity
CN201183043Y (en) * 2008-04-24 2009-01-21 重庆交通科研设计院 Universal stepless force adjusting frequency modulation vibrator
CN202621425U (en) * 2011-12-31 2012-12-26 武汉科技大学 Double eccentric block type vibration generator
CN106000851A (en) * 2016-07-01 2016-10-12 江苏科技大学 Step and stepless regulation device and regulation method for eccentricity of eccentric shaft

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100236355A1 (en) * 2007-10-26 2010-09-23 Vishvas Prabhakar Ambardekar Variable eccentricity assembly

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3794165A (en) * 1971-03-17 1974-02-26 Midwestern Ind Inc Motion control for a material separator
US4348912A (en) * 1979-08-21 1982-09-14 Thomas Hubert E Variable amplitude vibrator apparatus
FR2577826A1 (en) * 1984-02-23 1986-08-29 Zavody Tezkeho Strojirenstvi Vibration generator with infinitely adjustable eccentric torque
CN101049675A (en) * 2007-05-11 2007-10-10 常州宝菱重工机械有限公司 Eccentric shaft with adjustable eccentricity
CN201183043Y (en) * 2008-04-24 2009-01-21 重庆交通科研设计院 Universal stepless force adjusting frequency modulation vibrator
CN202621425U (en) * 2011-12-31 2012-12-26 武汉科技大学 Double eccentric block type vibration generator
CN106000851A (en) * 2016-07-01 2016-10-12 江苏科技大学 Step and stepless regulation device and regulation method for eccentricity of eccentric shaft

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
对胶砂振动台改幅的研究;孙孝;《水泥工程》;20020130(第06期);全文 *
新型作动器的机构设计;吴艳红等;《机械工程师》;20070810(第08期);全文 *

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