阅读说明：本技术 一种可实现振动筛双轨迹运动的调节偏心块 (Adjusting eccentric block capable of realizing double-track motion of vibrating screen ) 是由 吕志鹏 刘方 何圣杰 刘程宇 于 2019-10-18 设计创作，主要内容包括：本发明提供了一种可实现振动筛双轨迹运动的调节偏心块,包括：驱动偏心块、从动偏心块、弹簧轴和限位挡板,所述驱动偏心块固定在电机转轴上,所述驱动偏心块上设置有滑槽,所述滑槽包括径向滑槽和圆弧滑槽,所述径向滑槽与所述圆弧滑槽连通；从动偏心块,所述从动偏心块上设置有导向圆柱销,所述导向圆柱销的一端插入所述滑槽中,所述弹簧轴上套设有弹簧,所述弹簧的一端顶住所述从动偏心块,另一端顶住所述弹簧轴底部；限位挡板,所述限位挡板的一端与所述驱动偏心块固定连接,所述限位挡板的另一端位于所述从动偏心块的正上方。解决了现有的激振电机激振力固定,功能单一,不能适应各种工况的泥浆的问题。(The invention provides an adjusting eccentric block capable of realizing double-track motion of a vibrating screen, which comprises: the eccentric block is fixed on a motor rotating shaft, a sliding groove is formed in the eccentric block and comprises a radial sliding groove and an arc sliding groove, and the radial sliding groove is communicated with the arc sliding groove; the driven eccentric block is provided with a guide cylindrical pin, one end of the guide cylindrical pin is inserted into the sliding groove, the spring shaft is sleeved with a spring, one end of the spring props against the driven eccentric block, and the other end of the spring props against the bottom of the spring shaft; and one end of the limit baffle is fixedly connected with the driving eccentric block, and the other end of the limit baffle is positioned right above the driven eccentric block. The problem of current excitation motor exciting force fixed, the function is single, can not adapt to the mud of various operating modes is solved.)

1. An adjustable eccentric mass for enabling dual track motion of a shaker, comprising:

the driving eccentric block is fixed on a motor rotating shaft, a sliding groove is formed in the driving eccentric block and comprises a radial sliding groove and an arc sliding groove, and the radial sliding groove is communicated with the arc sliding groove;

the driven eccentric block is positioned on the outer side of the driving eccentric block, a guide cylindrical pin is arranged on the driven eccentric block, one end of the guide cylindrical pin penetrates through the driven eccentric block and is inserted into the sliding groove, an open slot is formed in the end face of the driven eccentric block, and the width of the bottom of the open slot is larger than that of the top of the open slot;

one end of the spring shaft is sleeved on the motor rotating shaft through a bearing, a spring is sleeved on the spring shaft, the other end of the spring shaft is inserted into the open slot, a baffle is arranged at the bottom of the other end of the spring shaft, one end of the spring abuts against the driven eccentric block, and the other end of the spring abuts against the baffle;

and one end of the limiting baffle is fixed on the end surface of the driving eccentric block, and the other end of the limiting baffle is positioned right above the driven eccentric block.

2. The adjusting eccentric block capable of realizing the double-track motion of the vibrating screen as claimed in claim 1, wherein a magnet is arranged on the driven eccentric block at a position corresponding to the limit baffle.

3. The adjusting eccentric block capable of realizing the double-track motion of the vibrating screen as claimed in claim 1, wherein the guide cylindrical pin is in threaded connection with the driven eccentric block.

4. The adjusting eccentric block capable of realizing the double-track motion of the vibrating screen as claimed in claim 1, wherein the driving eccentric block is fixed on the motor rotating shaft through a flat key.

5. The eccentric adjusting block for realizing the double-track motion of the vibrating screen as claimed in claim 1, wherein one end of the guide cylindrical pin is provided with a buffer layer.

6. The eccentric adjusting mass for dual track motion of a vibrating screen as claimed in claim 5, wherein the buffer layer is polyacetal plated on one end of the guide cylindrical pin.

7. The adjusting eccentric block capable of realizing the double-track motion of the vibrating screen as claimed in claim 1, wherein the bearing is a sliding bearing.

8. The adjusting eccentric block capable of realizing the double-track motion of the vibrating screen as claimed in claim 7, wherein a shaft diameter fastening nut is further sleeved on the rotating shaft of the motor, the shaft diameter fastening nut is positioned outside the sliding bearing, and the shaft diameter fastening nut is fixed on the rotating shaft of the motor through a screw.

Technical Field

The invention relates to a vibration excitation motor of a vibrating screen, in particular to an adjusting eccentric block capable of realizing double-track motion of the vibrating screen.

Background

In the oil drilling process, a drilling vibrating screen is required to be used for treating mud so that the mud can be recycled, and an excitation motor is the most important component in the process; the excitation motor is characterized in that a group of eccentric blocks are respectively arranged at two ends of a rotor shaft, and the excitation force is obtained by utilizing the centrifugal force generated by the high-speed rotation of the shaft and the eccentric blocks. The existing excitation motor is provided with fixed sliding blocks, mostly has a single motion track, is fixed in excitation force, is nonadjustable, has a single function, and cannot adapt to mud under various working conditions.

Disclosure of Invention

The invention aims to overcome the technical defects, provides the exciting force adjusting structure of the vibration sieve exciting motor, which has a simple structure, can quickly adjust the exciting force, realizes different motion tracks to adapt to mud under various working conditions, and fully combines the advantages of large handling capacity of a linear vibration sieve, capability of preventing sieve blockage and sieve paste of an elliptical vibration sieve and the like.

In order to achieve the technical purpose, the technical scheme of the invention provides an adjusting eccentric block capable of realizing double-track motion of a vibrating screen, which comprises the following components:

the driving eccentric block is fixed on a motor rotating shaft, a sliding groove is formed in the driving eccentric block and comprises a radial sliding groove and an arc sliding groove, and the radial sliding groove is communicated with the arc sliding groove;

the driven eccentric block is positioned on the outer side of the driving eccentric block, a guide cylindrical pin is arranged on the driven eccentric block, one end of the guide cylindrical pin penetrates through the driven eccentric block and is inserted into the sliding groove, an open slot is formed in the end face of the driven eccentric block, and the width of the bottom of the open slot is larger than that of the top of the open slot;

one end of the spring shaft is sleeved on the motor rotating shaft through a bearing, a spring is sleeved on the spring shaft, the other end of the spring shaft is inserted into the open slot, a baffle is arranged at the bottom of the other end of the spring shaft, one end of the spring abuts against the driven eccentric block, and the other end of the spring abuts against the baffle;

and one end of the limiting baffle is fixed on the end surface of the driving eccentric block, and the other end of the limiting baffle is positioned right above the driven eccentric block.

Furthermore, a magnet is arranged on the driven eccentric block at a position corresponding to the limit baffle.

Further, the guide cylindrical pin is in threaded connection with the driven eccentric block.

Furthermore, the driving eccentric block is fixed on the motor rotating shaft through a flat key.

Further, one end of the guide cylindrical pin is provided with a buffer layer.

Further, the buffer layer is made of polyacetal plated at one end of the guide cylindrical pin.

Further, the bearing is a sliding bearing.

Further, the motor rotating shaft is further sleeved with a shaft diameter fastening nut, the shaft diameter fastening nut is located on the outer side of the sliding bearing, and the shaft diameter fastening nut is fixed on the motor rotating shaft through a screw.

Compared with the prior art, the invention has the beneficial effects that: the adjusting eccentric block capable of realizing double-track motion of the vibrating screen can generate two different exciting forces when the motor rotates forwards and reversely, so that the vibrating screen can realize two different motion tracks of variable-linear track motion and translational elliptical track motion to adapt to the requirements of mud under various working conditions, and the advantages of large handling capacity of the linear vibrating screen, capability of preventing 'screen blockage' and 'screen paste' of the elliptical vibrating screen and the like are fully combined; meanwhile, the driven eccentric block is a sliding eccentric block, and the structure also obviously reduces the resonance amplitude of the vibrating screen during starting and stopping or reverse rotation.

Drawings

FIG. 1 is a schematic structural diagram of an adjusting eccentric block for realizing double-track motion of a vibrating screen, which is provided by the invention;

FIG. 2 is a cross-sectional view A-A of FIG. 1;

FIG. 3 is a schematic structural view of a driven eccentric mass;

FIG. 4 is a schematic structural view of a driving eccentric mass;

description of reference numerals:

1-magnet, 2-limit baffle, 3-hexagon bolt, 4-hexagon socket head cap screw, 5-spring shaft, 6-hexagon socket head cap screw, 7-fastening nut, 8-driving eccentric block, 9-motor rotating shaft, 10-driven eccentric block, 11-spring, 12-nut, 13-guide cylindrical pin, 14-bearing, 15-flat key, 16-arc chute, 17-radial chute, 18-open slot and 19-baffle.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 to 4, in order to solve the problems that the existing excitation motors are all set to be fixed sliding blocks, mostly have single motion tracks, have fixed excitation force, are nonadjustable, have single function, and cannot adapt to mud under various working conditions, an embodiment of the present invention provides an adjusting eccentric block capable of realizing double-track motion of a vibrating screen, including: the driving eccentric block 8 is fixed on the motor rotating shaft 9, a sliding groove is formed in the driving eccentric block 8 and comprises a radial sliding groove 17 and an arc sliding groove 16, and the radial sliding groove 17 is communicated with the arc sliding groove 16; the driven eccentric block 10 is positioned at the outer side of the driving eccentric block 8, a guide cylindrical pin 13 is arranged on the driven eccentric block 10, one end of the guide cylindrical pin 13 penetrates through the driven eccentric block 10 and is inserted into the sliding groove, an open groove 18 is formed in the end face of the driven eccentric block 10, and the width of the bottom of the open groove 18 is larger than that of the top of the open groove 18; one end of the spring shaft 5 is sleeved on the motor rotating shaft 9 through a bearing, a spring 11 is sleeved on the spring shaft 5, the other end of the spring shaft 5 is inserted into the open slot 18, the spring 11 is located in the open slot 18, the outer diameter of the spring 11 is larger than the width of the top of the open slot 18, a baffle plate 19 is arranged at the bottom of the other end of the spring shaft 5, one end of the spring 11 abuts against the driven eccentric block 10 at the top of the open slot 18, and the other end of the spring 11 abuts against the baffle plate 19; and one end of the limit baffle 2 is fixed on the end surface of the driving eccentric block 8, and the other end of the limit baffle 2 is positioned right above the driven eccentric block 10.

The invention can make the vibrating screen with two exciting motors realize two track motion modes, one is a variable straight motion track mode and the other is a translational elliptic motion track mode.

The mode of changing the straight-line motion track refers to that: when the vibrating screen is operated on site, the two excitation motors rotate anticlockwise to generate exciting forces in the same size and the symmetrical directions taking the perpendicular bisector of the connecting line of the two rotating shafts as a symmetrical axis, and the resultant force of the generated exciting forces is not larger than the mass center of the moving part of the vibrating screen, so that the vibrating screen realizes a linear movement track; in the mode, when the driving eccentric block 8 rotates anticlockwise, the driven eccentric block 10 is driven by the limit baffle 2 and the groove end of the arc chute 16, so that the driving eccentric block 8 and the driven eccentric block 10 are integrated to move in the same direction with the same movement track, and the resultant force of the exciting forces generated by the two exciting motors is not larger than the mass center of the movement part of the vibrating screen, so that the mode of changing the linear movement track is achieved.

The translational elliptic motion track mode refers to that: when the vibration machine is operated on site, the two excitation motors can generate two different excitation forces when rotating clockwise, so that the force center of the resultant force of the generated excitation forces is superposed with the mass center of the motion part of the vibrating screen, and the translational elliptic motion track is realized. The mode is that when the motor rotating shaft 9 rotates clockwise, the driving eccentric block 8 is firstly used as a driving block to rotate clockwise, the driven eccentric block 13 is not driven by the motor rotating shaft 9 because of being connected with the motor rotating shaft 9 through a bearing 14, meanwhile, the guide cylindrical pin 13 on the driven eccentric block 10 is not restrained in the arc chute 16 to slide relatively, when the guide cylindrical pin 13 slides to the tail end of the arc chute 16 to enter the radial chute 17, the driving eccentric block 8 and the driven eccentric block 10 rotate synchronously at the same angular frequency, because the rotating speed of the excitation motor is increased, the eccentric force is gradually increased, the driven eccentric block 10 does radial centrifugal motion along the arc chute 17 to a circumference with a certain radius because the eccentric force is larger than the elastic force of a spring 11, the driving eccentric block 8 and the driven eccentric block 10 do circular motion with different radii respectively, and the generated excitation force is synthesized with the excitation force generated by another structure to generate the excitation force under the state, and a translational elliptic track motion mode is realized.

Therefore, the eccentric adjusting block provided by the invention can enable the vibrating screen to realize two different motion tracks of variable linear motion and translational elliptic motion so as to adapt to the requirements of mud under various working conditions, and fully combines the advantages of large handling capacity of the linear vibrating screen, capability of preventing screen blockage and screen paste of the elliptic vibrating screen and the like.

As shown in fig. 1, a magnet 1 is disposed on the driven eccentric block 10 at a position corresponding to the limit baffle 2. After the motor stops rotating clockwise, in order to fix and position the driven eccentric block 10, a magnet 1 is arranged on the driven eccentric block 10 corresponding to the position of the limit baffle 2, and the driven eccentric block 10 is fixed and positioned by the adsorption force of the magnet 1 on the limit baffle 2, so that the mutual collision between the driven eccentric block and the limit baffle 2 is reduced, and the noise generated by the mutual collision is reduced.

As shown in fig. 2, wherein the guide cylindrical pin 13 is threadedly coupled with the driven eccentric mass 10.

Wherein, the driving eccentric block 8 is fixed on the motor rotating shaft 9 through a flat key 15.

Further, one end of the guide cylindrical pin 13 is provided with a buffer layer (not shown in the figure). In order to reduce the collision between the guide cylindrical pin 13 and the sliding chute and reduce the generated noise, a buffer layer is further arranged at one end of the guide cylindrical pin 13, and the buffer layer can prevent the guide cylindrical pin 13 from being deformed due to collision.

Preferably, the buffer layer is polyacetal plated at one end of the guide cylindrical pin 13. In order to improve the reliability of the cushion layer, prevent the cushion layer from easily falling off during use, and reduce the cost, the cushion layer is made of polyacetal plated at one end of the guide cylindrical pin 13.

Further, the bearing 14 is a sliding bearing. The bearing is particularly limited to a sliding bearing to reduce the cost, but is not limited to a sliding bearing, and may be a rolling bearing.

As shown in fig. 4, one end of the radial sliding groove 17 communicates with one end of the circular arc sliding groove 16.

As shown in fig. 1, a shaft diameter fastening nut 7 is further sleeved on the motor rotating shaft 9, the shaft diameter fastening nut 7 is located outside the sliding bearing, and the shaft diameter fastening nut 7 is fixed on the motor rotating shaft 9 through a screw. Preferably, the shaft diameter fastening nut 7 is fixed on the motor rotating shaft through an inner hexagonal socket head cap screw 6. The shaft diameter fastening nut 7 is used for limiting the axial direction of the eccentric block and preventing the eccentric block from moving along the axial direction of the motor rotating shaft 9.

The invention provides an adjusting eccentric block capable of realizing double-track motion of a vibrating screen, wherein a driven eccentric block can slide in an arc chute 16 and a radial chute 17 through a guide cylindrical pin 13 to realize structural change, when two excitation motors are operated on site and rotate reversely, a driving eccentric block 8 and a driven eccentric block 10 are integrated to move in the same direction with the same motion track, the resultant force of excitation forces generated by the two excitation motors is not larger than the mass center of the motion part of the vibrating screen, so that the vibrating screen realizes a variable linear motion track; when the two exciting motors rotate forward, the driven eccentric block can slide to the radial slide groove along the arc slide groove to do centrifugal motion and centripetal motion along with the extension and contraction of the spring, so that when the rotating speed is fixed, the driving eccentric block 8 and the driven eccentric block 10 respectively do circular motion with different radiuses, the generated exciting force is synthesized with the exciting force generated by another vibration exciter with a fixed structure to generate the exciting force in the state, thereby realizing the translational elliptic track motion mode, therefore, when the motor rotates forwards or backwards, two different exciting forces can be generated, so that the vibrating screen can realize two different motion tracks, the device can meet the requirements of mud under various working conditions, fully combines the advantages of large handling capacity of the linear vibrating screen and capability of preventing screen blockage and screen paste of the elliptical vibrating screen, and the like, and simultaneously, the driven eccentric block is a sliding eccentric block, this configuration also significantly reduces the resonant amplitude of the shaker during start-up and shut-down or reverse rotation.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention. Any other corresponding changes and modifications made according to the technical idea of the present invention should be included in the protection scope of the claims of the present invention.