Single-shaft elliptical vibration exciter capable of adjusting motion trail, vibrating screen and feeder

Abstract

The invention provides a single-shaft elliptical vibration exciter capable of adjusting a motion trail, 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 assembly, when the single-shaft elliptical vibration exciter works, the motor drives the rotating shaft to rotate, a rolling wheel abuts against the inner ring face of a deformation ring under the action of centrifugal force, the eccentric sliding block is forced to do elliptical motion in the radial direction of the rotating shaft, and the centrifugal force generated by the eccentric sliding block is transmitted to the bottom plate; and therefore, the bottom plate generates vibration with an elliptical motion trail. According to the vibration exciter, the oval shape of the inner ring face of the deformation ring can be adjusted at will, then the vibration exciter generates oval vibration meeting the material screening requirement, and the screening effect on different materials is effectively improved. Due to the fact that the shape of the inner ring face of the deformation ring is visible, the shape and the vibration angle of the elliptic motion trail can be specifically adjusted under the condition that the machine is not stopped. In addition, the invention has the characteristics of high energy efficiency ratio and long service life of the bearing.

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 the three-shaft vibration exciter with the elliptical motion trajectory is a better choice in terms of use effect, but in actual application, the existing three-shaft vibration exciter still has the following problems: 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.

[0007] 2. Depending on the feeding needs, an elliptical motion trajectory with a larger vibration angle can help reduce the material's forward movement speed and feed rate, while an elliptical motion trajectory with a smaller vibration angle can help increase the material's forward movement speed and feed rate. The vibration angle of an existing triaxial vibrator is essentially fixed after it is installed on a vibrating screen. Although the vibration angle can be adjusted by adjusting the installation angle between the three eccentric blocks, this adjustment is also vague and unconcrete, and the adjustment range of the vibration angle is relatively limited. Summary of the Invention

[0008] In order to overcome the shortcomings of the background technology, the present invention discloses a single-axis elliptical vibrator with adjustable motion trajectory, a vibrating screen, and a feeder, which adopt the following technical solutions: Technical Solution 1: A single-axis elliptical vibrator with adjustable motion trajectory, comprising: Motor; base plate; The rotating shaft is mounted on the bottom plate and connected to the motor, and a guide post is provided on the rotating shaft along the radial direction; An eccentric slider can slide along the guide column, and a roller is provided on the eccentric slider; The adjustable elliptical assembly mainly consists of a pair of swinging rings, a pair of frames, a deforming ring, a pair of brackets, and multiple connecting rods, wherein the frame and the brackets are mounted on a base plate; the swinging ring is rotatably arranged in the frame, and the center of the swinging ring is located on the axis of the rotating shaft. The connecting rods are hinged between the pair of swinging rings in parallel along the circumference of the swinging ring; a pair of support ears connected to the brackets are provided on both sides of the deforming ring, and through holes are provided along the circumference of the deforming ring to match the connecting rods. The deforming ring passes through the connecting rods and is arranged coaxially with the rotating shaft. When the swinging ring deflects to a certain angle, the connecting rods force the deforming ring to produce radial deformation, so that the inner ring surface of the deforming ring presents an elliptical shape corresponding to the angle; During operation, the motor drives the rotating shaft to rotate, and the roller is pressed against the inner ring surface of the deformation ring under the action of centrifugal force, forcing the eccentric slider to perform elliptical motion along the radial direction of the rotating shaft, and transmits the centrifugal force generated by the eccentric slider to the base plate, thereby causing the base plate to vibrate with an elliptical motion trajectory.

[0009] After implementing Technical Solution 1, compared with the background technology, the present invention can produce the following beneficial effects: 1. The present invention can arbitrarily adjust the elliptical shape of the inner ring surface of the deformation ring, thereby causing the vibrator to generate elliptical vibration that meets the material screening requirements, effectively improving the screening effect of different materials.

[0010] 2. The shape of the inner surface of the deformation ring is visible. By observing the shape of the inner surface, the shape of the elliptical motion trajectory and the ratio of the major and minor axes can be adjusted in a concrete manner without stopping the machine.

[0011] 3. The elliptical motion trajectory of existing triaxial vibrators is composite. During rotation, the centrifugal forces (excitation forces) of the eccentric masses cancel each other out, reducing energy utilization. Therefore, it can be said that the elliptical motion trajectory of triaxial vibrators is achieved by wasting some energy. According to research, the energy utilization rate of triaxial vibrators is typically only 60-70% (from "Energy Consumption Analysis of Vibration Machinery," Zhang Minghao 2023).

[0012] The elliptical motion trajectory of this invention is not synthetic, and there is no centrifugal force (excitation force) offsetting each other. The centrifugal force generated by the eccentric slider is almost entirely used to generate vibration. Apart from motor magnetic loss, unavoidable heat generation, and friction, there is virtually no wasted energy. Actual measurements have demonstrated that this invention has an energy efficiency ratio of ≥0.95.

[0013] 4. The bearings of existing vibrators are most susceptible to damage. The reason is that the centrifugal force (exciting force) generated by the rotation of the eccentric mass is first loaded on the bearings, and then transmitted to the housing of the vibrator through the bearing seat. In addition to bearing the rotational torque of the shaft (the weight of the eccentric mass is much smaller than the centrifugal force it generates and can be ignored), the bearings also have to bear the centrifugal force and eccentric load moment of the eccentric mass. According to the centrifugal force formula It can be seen that the high-speed rotation of the eccentric mass can generate huge centrifugal forces and eccentric load torques, which significantly shorten the service life of the bearings. According to verification, under moderate use, the service life of existing exciter bearings is only 1-2 years.

[0014] In this invention, the centrifugal force (excitation force) generated by the eccentric slider is directly transmitted to the base plate via the roller. The bearings only carry the rotational torque of the shaft, eliminating the centrifugal force and eccentric load torque generated by the eccentric slider. This significantly extends the bearing's service life. Comparative tests have shown that the bearings of this invention have a service life 4-5 times that of existing vibrator bearings under the same conditions.

[0015] 5. The industry has long believed that only multi-axis exciters can produce elliptical motion trajectories. The present invention adopts a single-axis technical solution to enable the exciter to produce an elliptical motion trajectory, and the elliptical motion trajectory can be adjusted arbitrarily, breaking the inherent cognition in the industry.

[0016] Improved technical solution 2 based on technical solution 1: The uniaxial elliptical vibrator also includes an angle adjustment mechanism for adjusting the deflection angle of the swing ring. The angle adjustment mechanism is mainly composed of a rotary handle, a T-bolt, and an annular T-slot, wherein the annular T-slot is arranged on the frame, the rotation center of the rotary handle is fixedly connected to the rotation axis of the swing ring, and the rotating end of the rotary handle is connected to the annular T-slot through a T-bolt.

[0017] After implementing Technical Solution 2, the beneficial effect is: the deflection angle of the swing ring can be adjusted through the deflection adjustment mechanism, so that the exciter produces elliptical vibration that meets the material screening requirements.

[0018] The improved technical solution 3 based on the technical solution 1 is that ball heads are arranged at two ends of the connecting rod, and a ball socket is arranged on the swing ring and hinged with the ball head.

[0019] After the technical solution 3 is implemented, the beneficial effect is that the hinge of the ball head and the ball socket has multiple degrees of freedom, which can ensure the flexibility of the connecting rod movement.

[0020] The improved technical solution 4 based on the technical solution 3 is that the swing ring is connected by two ring pieces, and the ball socket is arranged between the two ring pieces.

[0021] After the technical solution 4 is implemented, the beneficial effect is that the split design of the swing ring facilitates the processing and installation of the ball socket.

[0022] The improved technical solution 5 based on the technical solution 1 is that 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.

[0023] After the technical solution 5 is implemented, the beneficial effect 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 the occurrence of impact.

[0024] The improved technical solution 6 based on the technical solution 1 is that 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.

[0025] After the technical solution 6 is implemented, the beneficial effect 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, meeting the needs of different material screening and feeding.

[0026] The improved technical solution 7 based on any one of the technical solutions 1-6 is a vibrating screen with a screen box, and a single-shaft elliptical exciter is installed on the screen box.

[0027] After the technical solution 7 is implemented, the beneficial effect is that the single-shaft elliptical exciter of the present application not only enables the vibrating screen to produce 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.

[0028] The improved technical solution 8 based on any one of the technical solutions 1-6 is a feeder, and the feeder has a discharge chute, and a single-shaft elliptical exciter is installed on the discharge chute.

[0029] After the technical solution 8 is implemented, the beneficial effects generated are: the uniaxial elliptical vibration exciter of the application can adjust the vibration angle of the feeder at will, and can accurately control the feeding speed and feeding amount of the material. BRIEF DESCRIPTION OF DRAWINGS

[0030] BRIEF DESCRIPTION OF DRAWINGS Figure 1 The schematic diagram of the existing uniaxial vibration exciter is shown.

[0031] BRIEF DESCRIPTION OF DRAWINGS Figure 2 The schematic diagram of the existing biaxial vibration exciter is shown.

[0032] BRIEF DESCRIPTION OF DRAWINGS Figure 3 The schematic diagram of the existing triaxial vibration exciter is shown.

[0033] BRIEF DESCRIPTION OF DRAWINGS Figure 4 The structural schematic diagram of the uniaxial elliptical vibration exciter in embodiment 1 is shown.

[0034] BRIEF DESCRIPTION OF DRAWINGS Figure 5 The exploded view of the adjustable elliptical assembly is shown. Figure 4

[0035] BRIEF DESCRIPTION OF DRAWINGS Figure 6 The structural schematic diagram of the rotating shaft, guide column, eccentric sliding block and roller is shown.

[0036] BRIEF DESCRIPTION OF DRAWINGS Figure 7 The structural schematic diagram of the rotating shaft, eccentric sliding block and adjustable elliptical assembly is shown.

[0037] BRIEF DESCRIPTION OF DRAWINGS Figure 8 The exploded view of the adjustable elliptical assembly is shown.

[0038] BRIEF DESCRIPTION OF DRAWINGS Figure 9 The structural schematic diagram of the deformation ring before deformation is shown.

[0039] BRIEF DESCRIPTION OF DRAWINGS Figure 10 The structural schematic diagram of the uniaxial elliptical vibration exciter before adjustment is shown.

[0040] BRIEF DESCRIPTION OF DRAWINGS Figure 11 The structural schematic diagram of the uniaxial elliptical vibration exciter after adjustment is shown.

[0041] BRIEF DESCRIPTION OF DRAWINGS Figure 12 The structural schematic diagram of the deformation ring after deformation is shown.

[0042] BRIEF DESCRIPTION OF DRAWINGS Figure 13 The sectional view of the uniaxial elliptical vibration exciter is shown.

[0043] BRIEF DESCRIPTION OF DRAWINGS Figure 14 The force analysis diagram of the eccentric sliding block moving to the long axis of the ellipse is shown.

[0044] BRIEF DESCRIPTION OF DRAWINGS Figure 15 The force analysis diagram of the eccentric sliding block moving to the short axis of the ellipse is shown. ​

[0045] Figure 2 is a structural schematic diagram of the adjustable elliptical assembly and the positioning seat. Figure 16 Figure 3 is a structural schematic diagram of the uniaxial elliptical vibration exciter in Example 2.

[0046] Figure 4 is a structural schematic diagram of the adjustable elliptical assembly and the positioning seat. Figure 17

[0047] Figure 5 is a structural schematic diagram of the adjustable elliptical assembly. Figure 18

[0048] Figure 6 is a structural schematic diagram of the guide column, the spring and the eccentric slider. Figure 19

[0049] Figure 7 is a structural schematic diagram of the vibrating screen. Figure 20

[0050] Figure 8 is a structural schematic diagram of the feeder. Figure 21

[0051] In the drawings: 1, base plate; 2, rotating shaft; 3, guide column; 4, bearing seat; 5, eccentric slider; 6, roller; 7, adjustable elliptical assembly; 71, frame; 72, swing ring; 73, connecting rod; 74, deformation ring; 741, lug; 742, through hole; 75, bracket; 76, handle; 77, T-shaped bolt; 78, annular T-shaped slot; 79, connecting plate; 8, positioning seat; 9, spring; 10, screen box; 11, eccentric block; 12, motion trajectory; 13, discharge chute; 14, screw; 15, jackscrew. DETAILED DESCRIPTION

[0052] The preferred embodiments of the present application will be described below with reference to the drawings. It should be understood by those skilled in the art 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 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. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0053] ​​​​​The present application relates to the technical field of vibration exciter, mainly used to solve the problem of the existing technology that the elliptical motion track and vibration angle of three-axis vibration exciter cannot be adjusted.

[0054] Embodiment 1: refer to the attached Figure 4 and the attached Figure 5 The single-axis elliptical vibration 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, wherein the base plate 1 serves as the vibration source of the single-axis elliptical vibration exciter, and has connecting holes for connecting devices such as vibrating screen and feeder. The rotating shaft is installed on the base plate 1 through a pair of bearing seats 4 and connected with the motor (prior art, not shown in the figure). In this embodiment, an external spline is arranged 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).

[0055] refer to the attached Figure 6 A pair of cylindrical guide columns 3 are arranged on the rotating shaft 2 in the radial direction, and the guide columns 3 are fixed on the rotating shaft 2 through 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.

[0056] The eccentric sliding block 5 is roughly dumbbell-shaped, and has a roller 6 arranged at the middle part. The eccentric sliding block 5 has a certain weight, which generates centrifugal force or excitation 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.

[0057] refer to the attached Figure 5 , the attached Figure 7 and the attached Figure 8 The adjustable elliptical assembly 7 mainly consists of 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 installed on the base plate 1.

[0058] The swing ring 72 has rotating shafts at both ends, and is rotatably arranged in the frame 71, with the center of the swing ring 72 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. 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 two ring pieces through rivets, and the ball socket is arranged between the two ring pieces.

[0059] The deformation ring 74 is made of deformable material, such as plastic, copper, spring steel, etc. A pair of ears 741 is provided on both sides of the deformation ring 74, and the ears 741 are in sliding connection with the bracket 75. The function of the bracket 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 base plate 1. Along the circumference of the deformation ring 74, there are through holes 742 matched with the connecting rods 73, and the deformation ring 74 is arranged coaxially with the rotating shaft 2.

[0060] The adjustable elliptical assembly 7 also has a deflection angle adjusting mechanism for adjusting the deflection angle of the swing ring 72, which mainly consists of a handle 76, a T-shaped bolt 77, and a ring-shaped T-shaped groove 78. The ring-shaped T-shaped groove 78 is arranged on the frame, the rotation 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. By rotating the handle 76, the swing ring 72 can be deflected, and after tightening the nut, the swing ring 72 can be fixed on the frame 71, so that the swing ring 72 cannot rotate.

[0061] Referring to the accompanying drawings Figure 9 and the accompanying 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.

[0062] Referring to the accompanying drawings Figure 11 and the accompanying drawings Figure 12 By rotating the handle 76, the swing ring 72 can be deflected to a certain angle, at which time each connecting rod 73 forces the deformation ring 74 to produce radial deformation, so that the inner ring surface of the deformation ring 74 presents an ellipse corresponding to the angle. Then tighten the nut, so that the ellipse is no longer deformed. Since the deformation occurs on both sides of the deformation ring 74, the ears 741 will slide relative to the bracket 75. After tightening the nut, tighten the screw 14 on the bracket 75 to press the ears 741 against the bracket 75, which helps to improve the stiffness of the deformation ring 74 and transmit the centrifugal force generated by the eccentric slider 5 to the base plate 1 through the bracket 75.

[0063] Working principle: refer to the accompanying drawings Figures 13-15 When working, the motor drives the rotating shaft 2 to rotate, at which time the eccentric slider 5 slides outward along the guide column 3 under the action of centrifugal force, so that the roller 6 presses against the inner ring surface of the deformation ring 74. Since there is only negligible friction between the eccentric slider 5 and the guide column 3, almost all the centrifugal force (excitation force) F generated by the eccentric slider 5 is transmitted to the base plate 1 through the deformation ring 74, the connecting rod 73, the frame 71, and the bracket 75. At the same time, due to the geometric constraint of the deformation ring 74, the eccentric slider 5 can only move in an elliptical manner along the radial direction of the rotating shaft 2, and the shape of the ellipse (the accompanying drawings Figure 14 , the accompanying drawings Figure 15The shape of the inner surface of the deformation ring 74 has high similarity with the shape of the ellipse (indicated by the middle dotted line ellipse) and can be regarded as an equidistant offset of the inner surface shape inward. Thus, the elliptical motion trajectory of the eccentric slider 5 is generated by the geometric constraint of the deformation ring 74, not by the synthesis of multiple motion trajectories, and there is no centrifugal force offsetting condition, and the kinetic energy generated by the motor is almost used to generate vibration.

[0064] When the gravity center of the eccentric slider 5 is located on the long semi-axis a of the ellipse, the centrifugal force of the eccentric slider 5 is When the gravity center of the eccentric slider 5 is located on the short semi-axis b of the ellipse, the centrifugal force of the eccentric slider 5 is Thus, the centrifugal force of the eccentric slider 5 changes with the radius of the ellipse, and the centrifugal force is the smallest when located on the short semi-axis and the largest when located on the long semi-axis. In this way, the eccentric slider 5 not only performs elliptical motion, but also the centrifugal force is positively related to the radius of the ellipse, and the perfect combination of the centrifugal force and the motion trajectory is truly achieved, thereby making the motion trajectory of the bottom plate 1 an ideal vibration with a standard elliptical shape.

[0065] When the shape of the elliptical motion trajectory needs to be adjusted, the machine does not need to be stopped, and the shape of the elliptical motion trajectory and the ratio of the long axis to the short axis can be adjusted only by adjusting the rotation angle of the handle 76. Since the shape of the inner surface of the deformation ring 74 has visibility, the operator can adjust the shape of the elliptical motion trajectory of the exciter in a figurative way.

[0066] In addition, since the centrifugal force (excitation force) generated by the eccentric slider 5 is directly transmitted to the bottom plate 1, the bearings in the bearing seat 4 only bear the rotation torque of the rotating shaft 2 and do not bear the centrifugal force and eccentric load torque generated by the eccentric slider 5, thereby greatly prolonging the service life of the bearings.

[0067] Embodiment 2: The single-axis elliptical exciter in embodiment 1 has the biggest defect that the vibration angle cannot be adjusted.

[0068] Referring to FIG. 1, Figure 16 and FIG. 2, Figure 17 In order to solve the problem, the frame 71 in the embodiment is not rectangular but circular, and the adjustable positioning seat 8 for adjusting the rotation angle of the circular frame 71 is installed on the bottom plate 1.

[0069] Specifically, the ring table is arranged on the circular frame 71, 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 jackscrew 15, and the jackscrew 15 functions to tighten the circular frame 71, thereby enabling the vibration angle to be adjusted intuitively and figuratively without stopping the machine, and meeting the needs of different material screening and feeding.

[0070] Referring to FIG. 1, Figure 18It is also necessary to point out that a pair of connecting plates 79 are arranged between the pair of circular frames 71 and are arranged on the pair of lugs 741 of the deformation ring 74. Since the upper and lower sides of the deformation ring 74 are basically not deformed, the connecting plates 79 can be directly connected with the lugs 741 through the screws 14. The connecting plates 79 have two functions: one is to enable the pair of circular frames 71 to rotate synchronously; and the other is to replace the support 75 to prevent the deformation ring 74 from moving axially and to transmit the centrifugal force to the base plate 1.

[0071] Referring to the drawings Figure 19 In addition, the spring 9 is arranged between the rotating shaft 2 and the eccentric sliding block 5 and is arranged on the guide column 3. The spring 9 is arranged to press the roller 6 against the inner annular surface of the deformation ring 74.

[0072] In the embodiment 1, the spring is not arranged, and when the rotating shaft 2 is initially rotated, the roller 6 does not necessarily contact the inner annular surface of the deformation ring 74. With the increase of the rotating speed, the roller 6 can hit the inner annular surface at a high speed, which can easily cause damage to the parts. After the spring 9 is arranged between the rotating shaft 2 and the eccentric sliding block 5, the roller 6 can be always pressed against the inner annular surface to avoid the hitting. The stiffness of the spring 9 can be relatively small, so that the elastic force of the spring 9 applied to the eccentric sliding block 5 can be negligible relative to the centrifugal force.

[0073] Referring to the drawings Figure 20 The application further discloses a vibrating screen, which has a screen box 10, and the single-shaft elliptical vibration exciter described in the embodiment 1 or 2 is arranged on the screen box 10. The single-shaft elliptical vibration exciter can not only enable the vibrating screen to generate an elliptical motion track with an adjustable long-to-short axis ratio, but also can significantly improve the energy efficiency ratio of the vibrating screen, thereby greatly improving the energy saving and screening effect of the vibrating screen.

[0074] Referring to the drawings Figure 21 The application further discloses a feeder, which has a discharge chute 13, and the single-shaft elliptical vibration exciter in the embodiment 2 is arranged on the discharge chute 13. The single-shaft elliptical vibration exciter can adjust the vibration angle of the feeder at will, and then can accurately control the feeding speed and feeding amount of the material.

[0075] 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 uniaxial elliptical vibrator with adjustable motion trajectory, characterized by: include: Motor; base plate; The rotating shaft is mounted on the bottom plate and connected to the motor, and a guide post is provided on the rotating shaft along the radial direction; An eccentric slider can slide along the guide column, and a roller is provided on the eccentric slider; The adjustable elliptical assembly mainly consists of a pair of swinging rings, a pair of frames, a deforming ring, a pair of brackets, and multiple connecting rods, wherein the frame and the brackets are mounted on a base plate; the swinging ring is rotatably arranged in the frame, and the center of the swinging ring is located on the axis of the rotating shaft. The connecting rods are hinged between the pair of swinging rings in parallel along the circumference of the swinging ring; a pair of support ears connected to the brackets are provided on both sides of the deforming ring, and through holes are provided along the circumference of the deforming ring to match the connecting rods. The deforming ring passes through the connecting rods and is arranged coaxially with the rotating shaft. When the swinging ring deflects to a certain angle, the connecting rods force the deforming ring to produce radial deformation, so that the inner ring surface of the deforming ring presents an elliptical shape corresponding to the angle; During operation, the motor drives the rotating shaft to rotate, and the roller is pressed against the inner ring surface of the deformation ring under the action of centrifugal force, forcing the eccentric slider to perform elliptical motion along the radial direction of the rotating shaft, and transmits 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 uniaxial elliptical vibrator with adjustable motion trajectory according to claim 1, characterized in that: The uniaxial elliptical vibrator also includes an angle adjustment mechanism for adjusting the deflection angle of the swing ring. The angle adjustment mechanism is mainly composed of a rotary handle, a T-bolt, and an annular T-slot, wherein the annular T-slot is arranged on the frame, the rotation center of the rotary handle is fixedly connected to the rotation axis of the swing ring, and the rotating end of the rotary handle is connected to the annular T-slot through a T-bolt.

3. The uniaxial elliptical vibrator with adjustable motion trajectory according to claim 1, characterized in that: Ball heads are arranged at both ends of the connecting rod, and ball sockets hinged to the ball heads are arranged on the swing ring.

4. The uniaxial elliptical vibrator with adjustable motion trajectory according to claim 3, characterized in that: The swing ring is formed by connecting two ring pieces, and the ball socket is arranged between the two ring pieces.

5. The uniaxial elliptical vibrator with adjustable motion trajectory according to claim 1, characterized in that: 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.

6. The uniaxial elliptical vibrator with adjustable motion trajectory according to claim 1, characterized in that: The frame is a circular frame, and a positioning seat capable of adjusting the rotation angle of the circular frame is installed on the bottom plate.

7. A vibrating screen using the uniaxial elliptical vibrator according to any one of claims 1 to 6, characterized in that: The vibrating screen comprises a screen box, on which a single-axis elliptical vibrator is mounted.

8. A feeder using the uniaxial elliptical vibrator according to any one of claims 1 to 6, characterized in that: The feeder is provided with a discharging chute, on which a single-axis elliptical vibrator is installed.

Images