Single-shaft elliptical vibration exciter with adjustable motion trajectory, and vibrating screen and feeder

Abstract

The application provides a single-shaft elliptical vibration exciter with adjustable motion track and a vibrating screen and a feeder, and relates to the technical field of vibration exciters. The single-shaft elliptical vibration exciter is mainly composed of a motor, a bottom plate, a rotating shaft, an eccentric sliding block and an adjustable elliptical component. When working, the motor drives the rotating shaft to rotate, the rollers are pressed on the inner ring surface of the deformation ring under the action of centrifugal force, the eccentric sliding block is forced to make elliptical motion along the radial direction of the rotating shaft, and the centrifugal force generated by the eccentric sliding block is transmitted to the bottom plate, so that the bottom plate generates vibration with an elliptical motion track. The elliptical shape of the inner ring surface of the deformation ring can be adjusted arbitrarily, and the vibration exciter generates elliptical vibration meeting the requirements of material screening, thereby effectively improving the screening effect on different materials. Since the shape of the inner ring surface of the deformation ring is visible, the shape of the elliptical motion track and the vibration angle can be adjusted concretely without stopping the machine. In addition, the application has the characteristics of high energy efficiency ratio and long service life of bearings.

Description

TECHNICAL FIELD

[0001] The application is particularly a single-shaft elliptical vibration exciter with adjustable motion trajectory, a vibrating screen and a feeder, and relates to the technical field of vibration exciters. BACKGROUND

[0002] At present, there are three kinds of motion trajectories of mechanical vibration exciters, namely, circular, straight line and ellipse.

[0003] Referring to the attached drawings Figure 1 The motion trajectory 12 of the single-shaft vibration exciter is approximately circular, and has no vibration angle. The single-shaft vibration exciter has the advantages that the screen box 10 has both normal vibration and tangential vibration, and critical materials are not easy to block the screen holes; and the disadvantages that the materials can only jump in place and almost cannot move forward, so the screen box 10 needs to be inclined forward by a certain angle.

[0004] Referring to the attached drawings Figure 2 The two eccentric blocks 11 of the double-shaft vibration exciter have the same rotating speed and opposite rotating directions, and the combined motion trajectory 12 is a reciprocating straight line segment. The double-shaft vibration exciter has the advantages that it can screen materials and make the materials move forward; and the disadvantages that the centrifugal forces (vibration forces) of the two eccentric blocks 11 in the tangential direction offset each other, the screen box 10 lacks tangential vibration, and critical materials are easy to block the screen holes.

[0005] Referring to the attached drawings Figure 3 The three-shaft vibration exciter can be regarded as a combination of the single-shaft vibration exciter and the double-shaft vibration exciter, and the combined motion trajectory 12 is approximately an ellipse. The shape and vibration angle θ of the elliptical motion trajectory can be changed by adjusting the installation angle between the three eccentric blocks 11. The three-shaft vibration exciter has very comprehensive advantages, and the disadvantages are complex structure, large rotational inertia, large energy consumption and high cost.

[0006] From the above comparison, it can be seen that, in terms of use effect, the three-shaft vibration exciter with the elliptical motion trajectory characteristic is a better choice, but in actual application, the existing three-shaft vibration exciter still has the following problems:

[0007] 1. There are various materials, and according to the screening needs, some materials are suitable for the elliptical motion trajectory with a large ratio of major axis to minor axis, and some materials are suitable for the elliptical motion trajectory with a small ratio of major axis to minor axis, so it is necessary to adjust the shape of the elliptical motion trajectory according to local conditions. Although the shape of the elliptical motion trajectory can be changed by adjusting the installation angle between the three eccentric blocks, such adjustment is vague and cannot be visualized, and it is impossible to know whether the adjusted elliptical shape is the desired elliptical shape.

[0008] 2. Based on the feeding requirements, an elliptical motion trajectory with a larger vibration angle helps reduce the material's forward speed and feeding amount, while an elliptical motion trajectory with a smaller vibration angle helps increase the material's forward speed and feeding amount. Once the existing triaxial vibrator is installed on the vibrating screen, its vibration angle is essentially determined. Although the vibration angle can be adjusted by adjusting the installation angle between the three eccentric blocks, this adjustment is still fuzzy and not concrete, and the adjustment range of the vibration angle is relatively limited. Summary of the Invention

[0009] To overcome the shortcomings of the prior art, this invention discloses a single-axis elliptical vibrator with adjustable motion trajectory, a vibrating screen, and a feeder, employing the following technical solution:

[0010] Technical Solution 1: A single-axis elliptical exciter with adjustable motion trajectory, comprising:

[0011] Electric motor;

[0012] Base plate;

[0013] A rotating shaft is mounted on the base plate and connected to the motor. Guide posts are arranged radially on the rotating shaft.

[0014] An eccentric slider can slide along a guide post, and a roller is provided on the eccentric slider;

[0015] The adjustable elliptical assembly mainly consists of a pair of swing rings, a pair of frames, a deformation ring, a pair of supports, and multiple connecting rods. The frames and supports are mounted on a base plate. The swing rings are rotatably mounted within the frames, with their centers located on the axis of the rotating shaft. The connecting rods are hinged parallel to the circumference of the swing rings between the pair of swing rings. A pair of lugs connected to the supports are provided on both sides of the deformation ring. Through holes that mate with the connecting rods are provided along the circumference of the deformation ring. The deformation ring passes through the connecting rods and is coaxial with the rotating shaft. When the swing rings deflect at a certain angle, the connecting rods force the deformation rings to undergo radial deformation, causing the inner ring surface of the deformation ring to present an ellipse corresponding to that angle.

[0016] During operation, the motor drives the rotating shaft to rotate, and the roller presses against the inner ring surface of the deformation ring under the action of centrifugal force, forcing the eccentric slider to make elliptical motion along the radial direction of the rotating shaft, and transmitting the centrifugal force generated by the eccentric slider to the base plate, thereby causing the base plate to vibrate with an elliptical motion trajectory.

[0017] After implementing technical solution 1, compared with the prior art, the present invention can produce the following beneficial effects:

[0018] 1. The present invention can arbitrarily adjust the elliptical shape of the inner ring surface of the deformation ring, thereby enabling the vibrator to generate elliptical vibration that meets the material screening requirements, effectively improving the screening effect for different materials.

[0019] 2、The shape of the inner ring surface of the deformation ring has visibility, and by observing the shape of the inner ring surface, the shape of the elliptical motion trajectory and the major and minor axis ratio can be adjusted concretely without stopping.

[0020] 3、The existing three-axis exciter's elliptical motion trajectory is synthetic, and each eccentric block will appear in the process of rotation to offset the centrifugal force (excitation force), which reduces the utilization rate of electric energy. Therefore, it can also be said that the three-axis exciter's elliptical motion trajectory is achieved by wasting part of the electric energy. According to the investigation, the electric energy utilization rate of the three-axis exciter is usually only 60-70% (extracted from "Vibration Machinery Energy Consumption Analysis" Zhang Minghao 2023).

[0021] The elliptical motion trajectory of the present application is not synthetic, and there is no situation of offsetting the centrifugal force (excitation force), and the centrifugal force generated by the eccentric block is almost all used to generate vibration. Except for the inevitable heating and friction of the motor magnetic loss, there is basically no electric energy waste. The actual measurement proves that the energy efficiency ratio of the present application is ≥0.95.

[0022] 4、The most vulnerable part of the existing exciter is the bearing, and the reason is that the centrifugal force (excitation force) generated by the eccentric block during rotation is first loaded on the bearing, and then transmitted to the shell of the exciter through the bearing seat. In addition to bearing the rotating torque of the rotating shaft (the weight of the eccentric block is much smaller than the centrifugal force it generates, and can be ignored), the bearing also needs to bear the centrifugal force and eccentric load torque of the eccentric block. According to the centrifugal force formula It can be seen that the high-speed rotating eccentric block can generate a huge centrifugal force and eccentric load torque, which greatly shortens the service life of the bearing. According to the investigation, the service life of the bearing of the existing exciter is only 1-2 years under moderate use.

[0023] In the present application, the centrifugal force (excitation force) generated by the eccentric block is directly transmitted to the bottom plate through the roller, and the bearing only bears the rotating torque of the rotating shaft, and no longer bears the centrifugal force and eccentric load torque generated by the eccentric block, which greatly prolongs the service life of the bearing. Comparative tests prove that under the same conditions, the service life of the bearing of the present application is 4-5 times that of the bearing of the existing exciter.

[0024] 5、The industry has long believed that only multi-axis exciters can generate elliptical motion trajectories, and the present application uses a single-axis technical solution to also enable the exciter to generate an elliptical motion trajectory, and the elliptical motion trajectory can be adjusted arbitrarily, breaking the inherent cognition in the industry.

[0025] Based on technical solution 1, the improved technical solution 2: the single-axis elliptical exciter further comprises a deflection angle adjusting mechanism for adjusting the deflection angle of the swing ring, which mainly comprises a rotating handle, a T-shaped bolt and a ring-shaped T-shaped groove. The rotating center of the rotating handle is fixedly connected with the rotating shaft of the swing ring, and the rotating end of the rotating handle is connected with the ring-shaped T-shaped groove through the T-shaped bolt.

[0026] The beneficial effect of implementing technical solution 2 is that the swing ring deflection angle can be adjusted by the deflection angle adjusting mechanism, so that the exciter generates an elliptical vibration that meets the material screening requirements.

[0027] Improved technical solution 3 based on technical solution 1: ball heads are arranged at both ends of the connecting rod, and a ball socket is arranged on the swing ring and hinged with the ball head.

[0028] The beneficial effect of implementing technical solution 3 is that the hinging of the ball head and the ball socket has multiple degrees of freedom, which can ensure the flexibility of the connecting rod movement.

[0029] Improved technical solution 4 based on technical solution 3: the swing ring is connected by two ring pieces, and the ball socket is arranged between the two ring pieces.

[0030] The beneficial effect of implementing technical solution 4 is that the split design of the swing ring facilitates the machining and installation of the ball socket.

[0031] Improved technical solution 5 based on technical solution 1: a spring is installed on the guide column, and the spring is used to press the roller against the inner ring surface of the deformation ring.

[0032] The beneficial effect of implementing technical solution 5 is that during normal operation, the roller is pressed against the inner ring surface of the deformation ring under the action of centrifugal force, and no impact occurs. However, when starting, the roller may not be in contact with the inner ring surface of the deformation ring, which may cause impact. After the spring is arranged, the roller is always in contact with the inner ring surface of the deformation ring, avoiding impact.

[0033] Improved technical solution 6 based on technical solution 1: the frame is a circular frame, and a positioning seat for adjusting the rotation angle of the circular frame is installed on the bottom plate.

[0034] The beneficial effect of implementing technical solution 6 is that by adjusting the installation angle of the circular frame on the positioning seat, the vibration angle can be adjusted intuitively and concretely without stopping the machine, meeting the needs of different material screening and feeding.

[0035] Improved technical solution 7 based on any one of technical solutions 1-6: a vibrating screen has a screen box, and a single-shaft elliptical exciter is installed on the screen box.

[0036] The beneficial effect of implementing technical solution 7 is that the single-shaft elliptical exciter of the present application not only enables the vibrating screen to generate an elliptical motion trajectory with adjustable major and minor axis ratio, but also significantly improves the energy efficiency ratio of the vibrating screen, greatly improving the energy saving and screening effect of the vibrating screen.

[0037] Improvement technical solution 8 based on any one of technical solutions 1-6: a feeder, the feeder has a discharge chute, a single-shaft elliptical vibrator is installed on the discharge chute.

[0038] After implementing technical solution 8, the beneficial effect generated is that the single-shaft elliptical vibrator of the present application can adjust the vibration angle of the feeder at will, thereby being able to accurately control the feeding speed and feeding amount of the material. BRIEF DESCRIPTION OF DRAWINGS

[0039] The single-shaft elliptical vibrator is shown in the exploded view. Figure 1 The single-shaft elliptical vibrator is shown in the exploded view.

[0040] The double-shaft elliptical vibrator is shown in the exploded view. Figure 2 The double-shaft elliptical vibrator is shown in the exploded view.

[0041] The triple-shaft elliptical vibrator is shown in the exploded view. Figure 3 The triple-shaft elliptical vibrator is shown in the exploded view.

[0042] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 4 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0043] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 5 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 4 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0044] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 6 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0045] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 7 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0046] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 8 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0047] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 9 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0048] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 10 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0049] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 11 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0050] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 12 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0051] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 13 The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram.

[0052] The structure of the single-shaft elliptical vibrator in example 1 is shown in the structure diagram. Figure 14The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0053] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 15 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0054] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 16 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0055] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 17 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0056] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 18 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0057] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 19 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0058] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 20 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0059] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. Figure 21 The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0060] The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown. The force analysis diagram of eccentric slider moving to the long axis of the ellipse is shown.

[0061] The preferred embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art will understand that the preferred embodiments are only used to explain the technical principles of the present application and are not intended to limit the protection scope of the present application. It should be noted that in the description of the present application, the terms "front", "back", "up", "down", "left", "right", "vertical", "horizontal", "inner", "outer" and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation and positional relationship, and therefore cannot be understood as a limitation on the present application. It should also be noted that in the description of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be connected inside two components. Those skilled in the art can understand the specific meaning of the above terms in the present application according to the specific circumstances.

[0062] The present application relates to the technical field of exciter, mainly used to solve the problem that the elliptical motion trajectory and vibration angle of the three-axis exciter in the prior art cannot be adjusted. The composition structure and working principle of the present application will be described below.

[0063] Embodiment 1: refer to the accompanying drawings Figure 4 and the accompanying drawings Figure 5 The single-axis elliptical exciter of the present application mainly consists of a motor, a base plate 1, a rotating shaft 2, an eccentric sliding block 5 and an adjustable elliptical assembly 7. The base plate 1 serves as the vibration source of the single-axis elliptical exciter, and has connecting holes for connecting devices such as vibrating screens and feeders. The rotating shaft is installed on the base plate 1 through a pair of bearing seats 4 and is connected with the motor (prior art, not shown in the figure). In this embodiment, an external spline is provided at one end of the rotating shaft 2, and the motor drives the rotating shaft 2 to rotate through a universal transmission shaft (prior art, not shown in the figure).

[0064] Refer to the accompanying drawings Figure 6 On the rotating shaft 2, a pair of cylindrical guide columns 3 are arranged in the radial direction. The guide columns 3 are fixed on the rotating shaft 2 by threaded connection or interference fit. The guide columns 3 ensure that the eccentric sliding block 5 can only slide along the guide columns 3 and cannot rotate around the guide columns 3. The guide columns 3 are not limited to cylinders, but can also be square columns or other shapes with guiding function. For example, a square column-shaped guide column can also ensure that the eccentric sliding block can only slide along the guide column.

[0065] The eccentric slider 5 is roughly dumbbell-shaped, and a roller 6 is arranged at the middle part of the eccentric slider 5. The eccentric slider 5 has a certain weight, and functions to generate centrifugal force or exciting force when rotating. In order to improve the durability of the roller 6, a graphite self-lubricating copper sleeve is arranged between the roller 6 and the roller shaft.

[0066] Referring to the drawings Figure 5 , the drawings Figure 7 , and the drawings Figure 8 , the adjustable elliptical assembly 7 mainly comprises a pair of swing rings 72, a pair of frames 71, a deformation ring 74, a pair of supports 75 and twelve connecting rods 73, wherein the frame 71 is a rectangular frame, and the frame 71 and the support 75 are arranged on the bottom plate 1.

[0067] The swing ring 72 has rotating shafts at both ends, and is rotatably arranged in the frame 71, and the center of the swing ring 72 is located on the axis of the rotating shaft 2. Ball heads are arranged at both ends of the connecting rod 73, and ball sockets are arranged on the swing ring 72 and hinged with the ball heads, and each connecting rod 73 is hingedly connected between the pair of swing rings 72 in parallel along the circumferential direction of the swing ring 72. In order to facilitate processing and assembly, the swing ring 72 is connected by rivets between two ring pieces, and the ball socket is arranged between the two ring pieces.

[0068] The deformation ring 74 is made of deformable material, such as plastic, copper, spring steel, etc. A pair of lugs are arranged on both sides of the deformation ring 74, and the lugs 741 are slidingly connected with the supports 75. The function of the support 75 is to prevent the deformation ring 74 from moving axially, and to transmit the centrifugal force generated by the eccentric slider 5 to the bottom plate 1. A through hole 742 matched with each connecting rod 73 is arranged along the circumferential direction of the deformation ring 74, the deformation ring 74 is arranged across the connecting rod 73, and the deformation ring 74 is coaxially arranged with the rotating shaft 2.

[0069] The adjustable elliptical assembly 7 also has a deflection angle adjusting mechanism for adjusting the deflection angle of the swing ring 72, and the deflection angle adjusting mechanism mainly comprises a handle 76, a T-shaped bolt 77 and a ring-shaped T-shaped groove 78, wherein the ring-shaped T-shaped groove 78 is arranged on the frame, the rotating center of the handle 76 is fixedly connected with the rotating shaft of the swing ring 72, and the rotating end of the handle 76 is connected with the ring-shaped T-shaped groove 78 through the T-shaped bolt 77 and a nut. The swing ring 72 can be deflected by rotating the handle 76, and after tightening the nut, the swing ring 72 can be fixed on the frame 71, so that the swing ring 72 cannot rotate.

[0070] Referring to the drawings Figure 9 , and the drawings Figure 10 . When the handle 76 is at zero position, the swing ring 72 is parallel to the frame 71, and each connecting rod 73 is perpendicular to the swing ring 72, at this time, the inner ring surface of the deformation ring 74 is circular.

[0071] Referring to the drawings Figure 11 , and the drawings Figure 12By rotating the handle 76, the swing ring 72 can be deflected to a certain angle. At this time, each connecting rod 73 forces the deformation ring 74 to undergo radial deformation, making the inner ring surface of the deformation ring 74 ellipse corresponding to that angle. Then, tighten the nut to prevent the ellipse from deforming further. Since the deformation occurs on both sides of the deformation ring 74, the lug 741 will slide relative to the bracket 75. After tightening the nut, tighten the screw 14 on the bracket 75 to press the lug 741 against the bracket 75. This helps to improve the rigidity of the deformation ring 74 and, with the help of the bracket 75, transmits the centrifugal force generated by the eccentric slider 5 to the base plate 1.

[0072] Working principle: Refer to the appendix Figures 13-15 During operation, the motor drives the rotating shaft 2 to rotate. At this time, the eccentric slider 5 slides outward along the guide post 3 under the action of centrifugal force, causing the roller 6 to press against the inner ring surface of the deformation ring 74. Since there is only negligible friction between the eccentric slider 5 and the guide post 3, the centrifugal force (excitation force) F generated by the eccentric slider 5 is almost entirely transmitted to the base plate 1 through the deformation ring 74, connecting rod 73, frame 71, and bracket 75. At the same time, due to the geometric constraint of the deformation ring 74, the eccentric slider 5 is forced to move elliptically along the radial direction of the rotating shaft 2, and the shape of this ellipse (see attached diagram) is... Figure 14 Appendix Figure 15 The shape of the ellipse (shown as a dashed ellipse) is highly similar to that of the inner ring surface of the deformation ring 74, and can be considered as an inwardly offset shape of the inner ring surface. Therefore, the elliptical motion trajectory of the eccentric slider 5 is generated by the geometric constraints of the deformation ring 74, and is not synthesized from multiple motion trajectories. There is no situation where centrifugal force is canceled out, and almost all the kinetic energy generated by the motor is used to produce vibration.

[0073] When the center of gravity of the eccentric slider 5 is located on the semi-major axis a of the ellipse, the centrifugal force of the eccentric slider 5 can be calculated using the centrifugal force formula. When the center of gravity of the eccentric slider 5 is located on the minor semi-axis b of the ellipse, the centrifugal force of the eccentric slider 5... Therefore, it can be seen that the centrifugal force of the eccentric slider 5 varies with the radius of the ellipse. The centrifugal force is minimal when it is located on the minor axis and maximal when it is located on the major axis. In this way, the eccentric slider 5 not only performs elliptical motion, but the centrifugal force is also positively correlated with the radius of the ellipse, achieving a perfect combination of centrifugal force and motion trajectory, thereby enabling the base plate 1 to produce ideal vibration with a standard elliptical motion trajectory.

[0074] When it is necessary to adjust the shape of the elliptical motion trajectory, there is no need to stop the machine; simply adjust the angle of the handle 76 to adjust the shape of the elliptical motion trajectory and the ratio of its major and minor axes. Because the shape of the inner ring surface of the deformation ring 74 is visible, the operator can visually adjust the shape of the vibrator's elliptical motion trajectory.

[0075] In addition, since the centrifugal force (exciting force) generated by the eccentric slider 5 is directly transmitted to the base plate 1, the bearing in the bearing seat 4 only bears the rotating torque of the rotating shaft 2, and does not bear the centrifugal force and eccentric load torque generated by the eccentric slider 5, so the service life of the bearing is greatly prolonged.

[0076] Example 2: The single-shaft elliptical exciter in Example 1 has the biggest defect that the vibration angle cannot be adjusted.

[0077] Referring to the accompanying drawings Figure 16 and the accompanying drawings Figure 17 In order to solve this problem, the frame 71 in the embodiment is not rectangular, but circular, and the adjustable circular frame 71 rotating angle positioning seat 8 is installed on the base plate 1.

[0078] Specifically, the circular frame 71 is provided with a ring table, and the positioning seat 8 has a semicircular ring groove matched with the circular frame 71, and the circular frame 71 can rotate in the positioning seat 8. The side of the semicircular ring groove is screwed with a jack 15, and the function of the jack 15 is to tighten the circular frame 71, so as to adjust the vibration angle intuitively and figuratively without stopping the machine, and meet the needs of different material screening and feeding.

[0079] Referring to the accompanying drawings Figure 18 It should be noted that a pair of connecting plates 79 are arranged between the pair of circular frames 71, and a pair of ears 741 of the deformation ring 74 are arranged up and down. Since the upper and lower sides of the deformation ring 74 basically do not deform, the connecting plate 79 can be directly connected with the ear 741 through the screw 14. The connecting plate 79 has two functions: one is to make the pair of circular frames 71 rotate synchronously; the other is to replace the support 75 to prevent the deformation ring 74 from moving axially and transmit the centrifugal force to the base plate 1.

[0080] Referring to the accompanying drawings Figure 19 In addition, the embodiment also installs a spring 9 on the guide column 3, and the spring 9 is arranged between the rotating shaft 2 and the eccentric slider 5, which functions to press the roller 6 against the inner ring surface of the deformation ring 74.

[0081] In Example 1, no spring is arranged, and when the rotating shaft 2 starts to rotate, the roller 6 does not necessarily contact the inner ring surface of the deformation ring 74. With the increase of the rotating speed, the roller 6 may hit the inner ring surface at high speed, which is easy to cause damage to the parts. After the spring 9 is arranged between the rotating shaft 2 and the eccentric slider 5, the roller 6 can always be pressed against the inner ring surface, so as to avoid the impact. The stiffness of the spring 9 can be set to be relatively small, so that the elastic force of the spring 9 exerted on the eccentric slider 5 can be ignored.

[0082] Referring to the accompanying drawings Figure 20The application also discloses a vibrating screen with a screen box 10, wherein the single-axis elliptical vibrator described in the embodiment 1 or 2 is installed on the screen box 10. The single-axis elliptical vibrator can not only make the vibrating screen generate an elliptical motion track with an adjustable long-short axis ratio, but also significantly improve the energy efficiency ratio of the vibrating screen, thereby greatly improving the energy saving and screening effect of the vibrating screen.

[0083] The drawings are referred to Figure 21 The application also discloses a feeder with a discharge chute 13, wherein the single-axis elliptical vibrator in the embodiment 2 is installed on the discharge chute 13. The single-axis elliptical vibrator can adjust the vibration angle of the feeder at will, thereby precisely controlling the feeding speed and feeding amount of the material.

[0084] It is worth noting that the contents not described in detail in the above embodiments are prior art. It is also worth noting that any addition, replacement and improvement made by the person skilled in the art under the structure and principle of the application shall be included in the protection scope of the application.

Claims

1. A single-axis elliptical exciter with adjustable motion trajectory, characterized in that: include: Electric motor; Base plate; A rotating shaft is mounted on the base plate and connected to the motor. Guide posts are arranged radially on the rotating shaft. An eccentric slider can slide along a guide post, and a roller is provided on the eccentric slider; The adjustable elliptical assembly mainly consists of a pair of swing rings, a pair of frames, a deformation ring, a pair of supports, and multiple connecting rods. The frames and supports are mounted on a base plate. The swing rings are rotatably mounted within the frames, with their centers located on the axis of the rotating shaft. The connecting rods are hinged parallel to the circumference of the swing rings between the pair of swing rings. A pair of lugs connected to the supports are provided on both sides of the deformation ring. Through holes that mate with the connecting rods are provided along the circumference of the deformation ring. The deformation ring passes through the connecting rods and is coaxial with the rotating shaft. When the swing rings deflect at a certain angle, the connecting rods force the deformation rings to undergo radial deformation, causing the inner ring surface of the deformation ring to present an ellipse corresponding to that angle. During operation, the motor drives the rotating shaft to rotate, and the roller presses against the inner ring surface of the deformation ring under the action of centrifugal force, forcing the eccentric slider to make elliptical motion along the radial direction of the rotating shaft, and transmitting the centrifugal force generated by the eccentric slider to the base plate, thereby causing the base plate to vibrate with an elliptical motion trajectory.

2. The single-axis elliptical exciter with adjustable motion trajectory as described in claim 1, characterized in that: The single-axis elliptical vibrator also includes an angle adjustment mechanism for adjusting the deflection angle of the swing ring. The angle adjustment mechanism mainly consists of a handle, a T-bolt, and an annular T-slot. The annular T-slot is set on the frame, the rotation center of the handle is fixedly connected to the rotation axis of the swing ring, and the rotating end of the handle is connected to the annular T-slot through the T-bolt.

3. The single-axis elliptical exciter with adjustable motion trajectory as described in claim 1, characterized in that: Ball heads are provided at both ends of the connecting rod, and ball sockets that are hinged to the ball heads are provided on the swing ring.

4. A single-axis elliptical exciter with adjustable motion trajectory as described in claim 3, characterized in that: The swing ring is composed of two ring plates connected together, and the ball socket is disposed between the two ring plates.

5. A single-axis elliptical exciter with adjustable motion trajectory as described in claim 1, characterized in that: A spring is installed on the guide post, which is used to press the roller against the inner ring surface of the deformation ring.

6. The single-axis elliptical exciter with adjustable motion trajectory as described in claim 1, characterized in that: The frame is a circular frame, and a positioning seat that can adjust the rotation angle of the circular frame is installed on the base plate.

7. A vibrating screen using the uniaxial elliptical exciter as described in any one of claims 1-6, characterized in that: The vibrating screen has a screen box on which a single-axis elliptical vibrator is installed.

8. A feeder using the uniaxial elliptical vibrator as described in any one of claims 1-6, characterized in that: The feeder has a discharge chute, on which a single-axis elliptical vibrator is installed.

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