WO2021027561A1

WO2021027561A1 - Vibrating screen apparatus

Info

Publication number: WO2021027561A1
Application number: PCT/CN2020/105182
Authority: WO
Inventors: 王阳; 刘秀娟; 赵志明
Original assignee: 济南豪特创新管理咨询合伙企业(有限合伙)
Priority date: 2019-08-09
Filing date: 2020-07-28
Publication date: 2021-02-18
Also published as: CN211275402U

Abstract

A vibrating screen apparatus, comprising a driving device (2), an eccentric shaft (12), an eccentric balance component (3), a vibrating screen (13), a servo linear motion system (8), and a spiral mandrel (9). The driving device is fixedly connected to the eccentric balance component and drives the eccentric balance component to rotate synchronously. An axis through hole is formed in the eccentric shaft. The spiral mandrel is fixed in a circumferential direction and is movably mounted in the axis through hole in the axial direction. A servo actuator (17) of the servo linear motion system is rotatably connected to the spiral mandrel in the circumferential direction and is fixedly connected in a radial direction. The eccentric balance component is connected to the spiral mandrel by means of a matching structure of a spiral groove and a convex block. The axial movement of the spiral mandrel drives the eccentric balance component to rotate with respect to the eccentric shaft in the circumferential direction so as to realize the circumferential angle adjustment of the eccentric shaft and the eccentric balance component, and thus the eccentricity and exciting force are adjusted.

Description

Vibrating screen device

Technical field

The invention belongs to the technical field of vibrating devices, and specifically relates to a vibrating screen device.

Background technique

Vibrating screen devices are widely used in metallurgical mines, industrial production, engineering construction and other industries to achieve screening and transportation of objects. The exciter is the core part of the vibrating screen device and the source of the exciting force. At present, the vibration exciter used on the vibrating screen device can only control the speed of the excitation motor to control the vibration frequency, and it is not easy to adjust the excitation force or the user cannot adjust the excitation force after the vibrating screen device leaves the factory. Therefore, the vibrating screen devices on the market have the following shortcomings: 1. The excitation motor is started under a large eccentricity, that is, the excitation force. Due to the large starting load and the increase of the excitation motor current, it is easy to burn electrical components or damage the motor. 2. The vibrating screen device must pass through the resonance point when it is started and stopped. This will cause great damage to the vibrating screen device and greatly reduce the service life of the vibrating screen device. This is also one of the main reasons for the damage of the vibrating screen device now; , When there is no material on the vibrating screen device, it still works under a large excitation force, which wastes energy.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides a vibrating screen device with adjustable excitation force at any time.

A vibrating screen device includes a driving device (2), an eccentric shaft (12), an eccentric balance component (3) and a vibrating screen (13), and also includes a servo linear motion system (8) and a spiral mandrel (9). The driving device (2) is fixedly connected with the eccentric balance component (3) to drive the eccentric balance component (3) to rotate synchronously; the eccentric shaft (12) is provided with an axial through hole, and the spiral mandrel (9) ) It is fixed in the circumferential direction and movably installed in the shaft center through hole in the axial direction. The servo actuator (17) of the servo linear motion system (8) and the spiral mandrel (9) rotate circumferentially Connected and fixedly connected in the axial direction to drive the screw mandrel (9) to move axially; the eccentric balance component (3) is arranged outside at least one end of the eccentric shaft (12), and the eccentric balance component (3) is connected to The eccentric shaft (12) is rotationally connected in the circumferential direction and fixedly connected in the axial direction; the eccentric balance component (3) and the spiral mandrel (9) are connected by a matching structure of a spiral groove and a convex block, and the spiral core The axial movement of the shaft (9) drives the circumferential rotation of the eccentric balance member (3) relative to the eccentric shaft (12) to realize the circumferential angle adjustment of the eccentric shaft (12) and the eccentric balance member (3) , And then adjust the amount of eccentricity and the size of the exciting force.

In order to balance the vibrating screen device left and right, the eccentric balance component (3) is arranged outside the two ends of the eccentric shaft (12). The matching structures of the eccentric balance components (3), the spiral mandrel (9) and the eccentric shaft (12) on both sides are the same.

The eccentric balance component (3) can be an eccentric component of any structure, preferably an eccentric wheel.

The eccentric balance component (3) and the eccentric shaft (12) are connected in a circumferential rotation direction and the axial fixed connection can be realized through a bearing connection. The inner ring of the second bearing (16) is fixedly connected to the left end of the eccentric shaft (12); the outer ring of the second bearing (16) is fixedly connected to the inner hole wall of the eccentric balance member (3) .

Further, a second bearing gland (10) is provided outside the second bearing (16), the second bearing gland (10) is pressed against the inner ring of the second bearing (16), and the second bearing A bearing gland (10) fixes the second bearing (16) on the eccentric shaft (12).

In order to realize the connection between the eccentric balance member (3) and the spiral mandrel (9) through the matching structure of the spiral groove and the convex block.

The first method is: the end face of the eccentric balance member (3) is fixedly installed with an adjusting gland (1) provided with a through hole, and the spiral mandrel (9) passes through the adjusting gland through hole and is connected to the The adjusting gland (1) is connected by the matching structure of the spiral groove and the convex block.

The matching structure of the spiral groove and the convex block may be: the end section of the spiral mandrel (9) is provided with a first spiral groove (91), and the through hole of the adjusting gland is provided with the first spiral The groove (91) is matched with the first bump (11).

The spiral mandrel (9) is provided with a first linear groove (92) at the connection between the inner side of the first spiral groove (91) and the eccentric shaft (12), and the eccentric shaft (12) and An eccentric shaft through hole (121) is opened at the corresponding position of the first linear groove (92), and a guide block (121) is installed in the eccentric shaft through hole (121) and the first linear groove (92). 122). The matching structure of the guide block (122) and the first linear groove (92) can make the spiral mandrel (9) and the eccentric shaft (12) movably connected in the axial direction, and in the circumferential direction Fixed connection.

In order to increase the connection strength, preferably, the eccentric shaft through hole (121) is rectangular, and the guide block (122) is rectangular to increase the force-receiving area with the first linear groove (92).

The matching structure of the spiral groove and the convex block may also be: a second spiral groove is provided in the through hole of the adjusting gland, and the end section of the spiral mandrel (9) is provided with the second spiral groove Matching spiral bumps.

The driving device (2) can be an output shaft or a pulley of an excitation motor. The motor output shaft is directly connected to the left eccentric balance component (3) through a coupling; the pulley transmits the rotation of the excitation motor to the left eccentric balance component (3) through a belt. Preferably, a pulley is used. The pulley (2) is fixedly connected with the left eccentric balance component (3).

The servo actuator (17) is connected to the spiral mandrel (9) for circumferential rotation and the axial fixed connection can be realized through a bearing connection. The inner ring of the first bearing (14) is fixedly connected with the right end of the spiral mandrel (9); the outer ring of the first bearing (14) is fixedly connected with the servo actuator (17). This structure enables the servo actuator (17) to act synchronously with the spiral mandrel (9) in the axial direction, but does not rotate with the spiral mandrel (9) in the radial direction, preventing the excitation motor from rotating through the spiral core The shaft (9) is transferred to the servo linear actuator (17).

The servo linear motion system (8) can be a hydraulic cylinder, an air cylinder or a servo linear motor. Correspondingly, the servo actuator (17) is a hydraulic rod, a cylinder rod or a screw. The servo linear motion system (8) controls the axial position of the servo actuator (17) and locks at any position within the stroke range.

Preferably, the servo linear motion system (8) is a servo linear motor, and the servo actuator (17) is a screw.

The vibrating screen (13) is fixedly connected with the eccentric shaft housing (6).

One way is: the eccentric shaft (12) is installed on the bearing seat (5) through the third bearing (15); preferably, the third bearing (15) is fixedly installed on the bearing seat (5) using a gland (4) 5) on; the eccentric shaft (12) is provided with an eccentric shaft housing (6); the bearing seat (5) is fixedly mounted on the eccentric shaft housing (6); the vibrating screen (13) and the The bearing seat (5) is fixedly connected, and the vibrating screen (13) is fixedly connected with the eccentric shaft housing (6).

Preferably, the servo linear motion system (8) is fixedly installed on the vibrating screen device through a mounting seat (7).

In order to fix the servo linear motion system (8), a feasible way is: the servo linear motion system (8) is provided with a mounting seat (7), the mounting seat (7) and the eccentric shaft housing (6) ) Fixed connection.

The working process of the vibrating screen device provided by the present invention is:

The excitation motor drives the driving device (2) to rotate. The driving device (2) drives the eccentric balance member (3) to rotate synchronously, and under the connection of the guide block (122), drives the eccentric shaft (12) to synchronize Rotation generates an exciting force to vibrate the vibrating screen and sieving materials; when the size of the exciting force needs to be adjusted, the servo linear motion system (8) is activated to drive the servo actuator (17) to move linearly, Drive the spiral mandrel (9) to move in the axial direction, and drive the eccentric balance component (3) to rotate relative to the eccentric shaft (12) in the circumferential direction under the action of the matching structure of the spiral groove and the convex block , Adjusting the relative included angle between the eccentric balance component (3) and the eccentric shaft (12), changing the amount of eccentricity, and achieving the purpose of adjusting the excitation force.

The centrifugal force calculation formula of the eccentric balance component (3) and the eccentric shaft (12) is as follows:

F=meω ²

Among them, m is the mass of the rotating part, m ₂ is the total mass of the left and right eccentric balance components (3), e ₂ is the centroid diameter of the eccentric balance components (3), m ₁ is the mass of the eccentric shaft (12), and e ₁ is The centroid radial of the eccentric shaft (12), and ω is the angular velocity of rotation.

When the eccentric wheel (3) is adjusted to 0 degree with the eccentric shaft (12), the exciting force of the vibrating screen device is F=m ₁ e ₁ ω ² + m ₂ e ₂ ω ² , and the exciting force is the largest at this time .

When the eccentric wheel (3) is adjusted to be 180 degrees with the eccentric shaft (12), the exciting force of the vibrating screen device is F=m ₁ e ₁ ω ² -m ₂ e ₂ ω ² , and the exciting force is the smallest at this time . When m ₁ e ₁ ω ² =m ₂ e ₂ ω ² , the diameter of the center of mass of the vibrating screen device is 0, and the exciting force of the vibrating screen device is 0 at this time.

Compared with the prior art, the vibrating screen device provided by the present invention can adjust the exciting force of the vibrator in real time during the working process of the vibrating screen. In addition, the adjustment process does not require any state conditions, and the eccentricity can be controlled when the excitation motor is stationary or at any speed to achieve the purpose of adjusting the excitation force. The following technical tasks can be achieved:

(1) When working, the eccentricity can be adjusted at any speed, that is, the excitation force can be adjusted.

(2) When starting, the excitation force can be adjusted to a minimum, reduce the starting load of the excitation motor, protect the motor, and extend the service life.

(3) When starting and stopping, the vibration screen can be effectively protected by adjusting the excitation force of the exciter to quickly pass the resonance point of the vibration screen.

(4) Sensors can be installed on the vibrating screen device. According to the sensors on the vibrating screen device, the amount or presence of materials on the vibrating screen can be sensed to automatically control the size of the exciting force to achieve the purpose of energy saving.

(5) The adjustment of the excitation force of the vibrating screen device combined with electrical control will become simple and convenient, and it is more suitable for automatic control of the use process of the vibrating screen.

Description of the drawings

Figure 1 is a schematic diagram of the structure of the vibrating screen device of the present invention;

Figure 2 is an exploded schematic diagram of the connection relationship between the spiral mandrel and other components;

Figure 3 is a schematic diagram of the axial cross-sectional structure when the exciting force is maximum;

Figure 4 is a schematic view of the axial cross-sectional structure when the exciting force is minimum.

Among them, 1. adjusting gland 11, bump 2, drive device 3, eccentric balance component 4, bearing gland 5, bearing seat 6, eccentric shaft housing 7, mounting seat 8, servo linear motion system 9, spiral mandrel 91 , Spiral groove 92, linear groove 10, second bearing gland 12, eccentric shaft 122, guide block 121, eccentric shaft through hole 13, vibrating screen 14, first bearing 15, third bearing 16, second bearing 17 , Servo actuator

detailed description

The present invention will be described in detail below in conjunction with the drawings.

Example 1:

As shown in Figure 1, a vibrating screen device includes a driving device 2, which is a pulley, an eccentric shaft 12, an eccentricity 3 and a vibrating screen 13, a servo linear motion system 8 and a spiral mandrel 9, the The pulley is fixedly connected with the eccentric wheel 3 to drive the eccentric wheel 3 to rotate synchronously.

The servo actuator 17 of the servo linear motion system 8 is connected to the spiral mandrel 9 in a circumferential direction and axially fixedly connected to drive the spiral mandrel 9 to move axially; the eccentric wheel 3 is arranged on the eccentric The outer sides of the two ends of the shaft 12, and the eccentric wheel 3, the spiral mandrel 9 and the eccentric shaft 12 have the same matching structure.

The eccentric wheel 3 and the eccentric shaft 12 are connected through a second bearing 16. The inner ring of the second bearing 16 is fixedly connected to the end of the eccentric shaft 12; the outer ring of the second bearing 16 is connected to the The inner hole wall of the eccentric wheel 3 is fixedly connected. A second bearing gland 10 is provided outside the second bearing 16, the second bearing gland 10 is pressed against the inner ring of the second bearing 16, and the second bearing gland 10 protects the second bearing The bearing 16 is fixedly installed on the eccentric shaft 12.

The eccentric wheel 3 and the spiral mandrel 9 are connected by a matching structure of spiral grooves and protrusions. The axial movement of the spiral mandrel 9 drives the eccentric balance member 3 to rotate relative to the eccentric shaft 12 in the circumferential direction. The circumferential angle adjustment of the eccentric shaft 12 and the eccentric balance member 3 is realized, thereby adjusting the amount of eccentricity and the magnitude of the exciting force.

In order to realize the connection between the eccentric wheel 3 and the spiral mandrel 9 through the matching structure of the spiral groove and the convex block. The specific connection method is: the end face of the eccentric wheel 3 is fixedly installed with an adjusting gland 1 provided with a through hole, and the spiral mandrel 9 passes through the through hole of the adjusting gland, and passes through the spiral recess with the adjusting gland 1 The matching structure of the groove and the bump is connected.

As shown in FIG. 2, the matching structure of the spiral groove and the convex block may be: the end section of the spiral mandrel 9 is provided with a first spiral groove 91, and the through hole of the adjusting gland is provided with the first spiral groove 91. A helical groove 91 is matched with the convex block 11.

The eccentric shaft 12 is provided with an axial through hole, and the spiral mandrel 9 is fixed in the circumferential direction and movably installed in the axial through hole. The specific connection method is: the spiral mandrel 9 A first linear groove 92 is provided at the connection between the inner side of the first spiral groove 91 and the eccentric shaft 12, and a rectangular eccentric shaft is provided at the corresponding position of the eccentric shaft 12 and the first linear groove 92. In the hole 121, a rectangular guide block 122 is installed in the eccentric shaft through hole 121 and the first linear groove 92. The matching structure of the guide block 122 and the first linear groove 92 can make the spiral mandrel 9 and the eccentric shaft 12 movably connected in the axial direction and fixedly connected in the circumferential direction.

The servo actuator 17 is connected to the spiral mandrel 9 through a first bearing 14. The inner ring of the first bearing 14 is fixedly connected to the right end of the spiral mandrel 9; the outer ring of the first bearing 14 It is fixedly connected with the servo actuator 17. This structure enables the servo actuator 17 to act synchronously with the spiral mandrel 9 in the axial direction, but does not rotate with the spiral mandrel 9 in the radial direction, which prevents the excitation motor from transmitting the rotation through the spiral mandrel 9 to the servo linear Executive agency 17.

The servo linear motion system 8 is a servo linear motor, and the servo actuator 17 is a screw.

The specific method for the fixed connection between the vibrating screen 13 and the eccentric shaft 12 is: the eccentric shaft 12 is mounted on the bearing housing 5 through a third bearing 15 and the third bearing 15 is fixedly mounted on the bearing by using a gland 4 Seat 5. An eccentric shaft housing 6 is provided outside the eccentric shaft 12; the bearing housing 5 is fixedly mounted on the eccentric shaft housing 6; the vibrating screen 13 is fixedly connected to the bearing housing 5, and the vibrating screen 13 is connected to the The eccentric shaft housing 6 is fixedly connected.

The servo linear motion system 8 is fixedly mounted to the vibrating screen device through a mounting seat 7, as shown in FIG. 1, the servo linear motion system 8 is provided with a mounting seat 7, and the mounting seat 7 and the eccentric shaft housing 6Fixed connection.

The excitation motor drives the pulley to rotate. The pulley drives the eccentric wheel 3 to rotate synchronously. Under the connection of the guide block 122, the eccentric shaft 12 is driven to rotate synchronously to generate an exciting force to make the vibrating screen vibrate. Divide the material; when the excitation force needs to be adjusted, start the servo linear motion system 8, drive the servo actuator 17 to move linearly, drive the spiral mandrel 9 to move in the axial direction, in the spiral groove Under the action of the matching structure with the convex block, the eccentric wheel 3 is driven to rotate relative to the eccentric shaft 12 in the circumferential direction, the relative included angle between the eccentric wheel 3 and the eccentric shaft 12 is adjusted, and the amount of eccentricity is changed to achieve adjustment The purpose of exciting force.

The calculation formula of the centrifugal force of the eccentric wheel 3 and the eccentric shaft 12 is as follows:

F=meω ²

Among them, m is the mass of the rotating part, m ₂ is the total mass of the left and right eccentric balance parts 3, e ₂ is the centroid diameter of the eccentric wheel 3, m ₁ is the mass of the eccentric shaft 12, and e ₁ is the centroid diameter of the eccentric shaft 12. , Ω is the angular velocity of rotation.

As shown in Figure 3, when the eccentric wheel 3 is adjusted to be 0 degrees with the eccentric shaft 12, the excitation force of the exciter is F=m ₁ e ₁ ω ² + m ₂ e ₂ ω ² , and the vibration is excited at this time Maximum force.

As shown in Figure 4, when the eccentric wheel 3 is adjusted to be 180 degrees with the eccentric shaft 12, the excitation force of the exciter is F=m ₁ e ₁ ω ² -m ₂ e ₂ ω ² , at this time, the excitation The least force. When m ₁ e ₁ ω ² =m ₂ e ₂ ω ² , the diameter of the center of mass of the vibrating screen device is 0, and the exciting force of the vibrating screen device is 0 at this time.

Example 2:

Same as Embodiment 1, except that the eccentric wheel 3 and the spiral mandrel 9 are connected by the matching structure of the spiral groove and the convex block in another specific manner: inside the through hole of the adjusting gland A second spiral groove is provided, and the end section of the spiral mandrel 9 is provided with a spiral protrusion that matches with the second spiral groove.

Example 3:

The same as the first embodiment, except that the servo linear motion system 8 is a hydraulic cylinder, and the servo actuator 17 is a hydraulic rod.

Example 4:

The same as the first embodiment, the difference is that the servo linear motion system 8 is a cylinder, and the servo actuator 17 is a cylinder rod.

Claims

A vibrating screen device, comprising a driving device (2), an eccentric shaft (12), an eccentric balance component (3) and a vibrating screen (13), characterized in that it also includes a servo linear motion system (8) and a spiral mandrel ( 9), the driving device (2) is fixedly connected with the eccentric balance component (3); the eccentric shaft (12) is provided with an axial through hole, and the spiral mandrel (9) is fixed in the circumferential direction and axially The upper part is movably installed in the shaft through hole, and the servo actuator (17) of the servo linear motion system (8) is connected to the spiral mandrel (9) for circumferential rotation and axially fixed connection; The eccentric balance component (3) is arranged outside at least one end of the eccentric shaft (12), and the eccentric balance component (3) is connected to the eccentric shaft (12) in a circumferential rotation and axially fixed connection; the eccentric balance The component (3) is connected with the spiral mandrel (9) through the matching structure of the spiral groove and the convex block.
The vibrating screen device according to claim 1, characterized in that the eccentric balance member (3) is arranged outside the two ends of the eccentric shaft (12).
The vibrating screen device according to claim 2, wherein the eccentric balance member (3) is an eccentric wheel.
The vibrating screen device according to claim 3, wherein the eccentric balance component (3) and the eccentric shaft (12) are connected by a second bearing (16), and the inner part of the second bearing (16) The ring is fixedly connected with the left end of the eccentric shaft (12); the outer ring of the second bearing (16) is fixedly connected with the inner hole wall of the eccentric balance component (3).
The vibrating screen device according to claim 4, wherein a second bearing gland (10) is provided outside the second bearing (16), and the second bearing gland (10) is pressed against the On the inner ring of the second bearing (16), the second bearing gland (10) fixedly installs the second bearing (16) on the eccentric shaft (12).
The vibrating screen device according to claim 5, characterized in that the end surface of the eccentric balance member (3) is fixedly installed with an adjusting gland (1) provided with a through hole, and the spiral mandrel (9) passes through the adjusting The gland through hole is connected with the adjusting gland (1) through the matching structure of the spiral groove and the convex block.
The vibrating screen device according to claim 6, wherein the end section of the spiral mandrel (9) is provided with a first spiral groove (91), and the through hole of the adjusting gland is provided with the first spiral groove (91). The convex block (11) matched with the spiral groove (91).
The vibrating screen device according to claim 6, wherein a second spiral groove is provided in the through hole of the adjusting gland, and the end section of the spiral mandrel (9) is provided with the second spiral groove. Matching spiral bumps.
The vibrating screen device according to claim 7, characterized in that the spiral mandrel (9) is provided with a first straight line at the connection point between the inner side of the first spiral groove (91) and the eccentric shaft (12). The groove (92) is provided with an eccentric shaft through hole (121) at the position corresponding to the eccentric shaft (12) and the first linear groove (92), and the eccentric shaft through hole (121) is connected to the A guide block (122) is installed in the first linear groove (92).
The vibrating screen device according to claim 9, characterized in that the eccentric shaft through hole (121) is rectangular, and the guide block (122) is rectangular.
The vibrating screen device according to any one of claims 1-10, wherein the driving device (2) is a pulley, and the pulley is fixedly connected to the eccentric balance member (3) on the left side.
The vibrating screen device according to claim 11, characterized in that, the servo actuator (17) and the spiral mandrel (9) are connected by a first bearing (14), and the first bearing (14) The inner ring is fixedly connected with the right end of the spiral mandrel (9); the outer ring of the first bearing (14) is fixedly connected with the servo actuator (17).
The vibrating screen device according to claim 12, wherein the servo linear motion system (8) is a hydraulic cylinder, and the servo actuator (17) is a hydraulic rod.
The vibrating screen device according to claim 12, wherein the servo linear motion system (8) is an air cylinder, and the servo actuator (17) is a cylinder rod.
The vibrating screen device according to claim 12, characterized in that the servo linear motion system (8) is a servo linear motor, and the servo actuator (17) is a screw.
The vibrating screen device according to claim 15, characterized in that the eccentric shaft (12) is mounted on the bearing seat (5) through a third bearing (15); a gland (4) is used to connect the third bearing (15) ) Is fixedly installed on the bearing housing (5); the eccentric shaft (12) is provided with an eccentric shaft housing (6); the bearing housing (5) is fixedly installed on the eccentric shaft housing (6); the vibration The screen (13) is fixedly connected with the bearing seat (5), and the vibrating screen (13) is fixedly connected with the eccentric shaft housing (6).
The vibrating screen device according to claim 16, characterized in that the servo linear motion system (8) is fixedly installed on the vibrating screen device through a mounting seat (7).
The vibrating screen device according to claim 17, wherein the mounting seat (7) is fixedly connected to the eccentric shaft housing (6).