A vibrating motor crankshaft vibration device and a wind power coal separator containing the device

Abstract

The application discloses a vibrating motor crankshaft vibration device and a wind force coal selecting machine containing the device, relates to the technical field of mining equipment, and the vibrating motor crankshaft vibration device comprises a main shaft, a first shaft end, a second shaft end, a main eccentric block, a vice eccentric block, a transmission shaft and a drive shaft. The main shaft is provided with a main middle section, a main eccentric section, a main transition section, a crank section and a main end section from the middle to the two ends; the first shaft end is fixedly arranged at the two ends of the main shaft and is eccentrically arranged; the second shaft end is fixedly arranged at the two ends of the vice shaft and is eccentrically arranged with the vice shaft; the main eccentric block is fixedly arranged on the main eccentric section; the vice eccentric block is fixedly arranged on the vice eccentric section; the end portions of the first shaft end and the second shaft end are provided with drive gears; the drive shaft is fixedly arranged on the end portion of the transmission shaft and is used for driving the motor; the rocker arm connecting rod is rotationally connected to the crank section. The application has the effect of prolonging the service life of the vibrating motor used for screening minerals, thereby reducing the probability of maintenance and failure of the coal selecting machine, improving the coal selecting yield and production efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mining equipment, in particular to a vibrating motor crankshaft vibration device and a wind force coal separator containing the device. BACKGROUND

[0002] In large vibrating screen selection equipment such as wind force coal separator, the vibration module is generally a vibrating motor, and is a crankshaft vibrating motor in the vibrating motor, also known as a crankshaft vibration device. The inertia brought by the rotation of the crankshaft drives the corresponding screening part to produce regular vibration, thereby realizing the screening of coal and other minerals.

[0003] Since the crankshaft vibrating motor generates vibration by eccentric rotation when working, the greater the inertia during rotation, the relatively shorter the service life. Most crankshaft vibrating motors increase their service life by replacing large-load bearings, but essentially the service life of the bearing is improved, and the reason for reducing the service life is not improved. Among them, the reason why the service life of most crankshaft vibrating motors is difficult to improve is because of the inertia brought by the rotation of the crankshaft. This inertia realizes the function of vibrating screening, and is the fundamental reason for reducing the service life. Therefore, in order to improve the service life of the crankshaft vibrating motor, the crankshaft structure and weight distribution need to be more reasonably designed, which is also a design difficulty in this field. SUMMARY

[0004] In order to improve the defect that the service life of the crankshaft vibrating motor is difficult to improve due to unreasonable design of the crankshaft, the present application provides a vibrating motor crankshaft vibration device and a wind force coal separator containing the device.

[0005] The vibrating motor crankshaft vibration device provided by the present application adopts the following technical scheme:

[0006] A vibrating motor crankshaft vibration device, comprising

[0007] A main shaft, with the middle part to the two ends being a main middle segment, a main eccentric segment, a main transition segment, a crank segment and a main end segment;

[0008] A first shaft end fixedly arranged at the two ends of the main shaft, with the central axis not collinear with the central axis of the main shaft, for a bearing seat to be arranged and installed;

[0009] A secondary shaft, with the middle part to the two ends being a secondary middle segment, a secondary eccentric segment and a secondary end segment;

[0010] A second shaft end fixedly arranged at the two ends of the secondary shaft, with the central axis not collinear with the central axis of the secondary shaft, for a bearing seat to be arranged and installed;

[0011] Two main eccentric blocks fixedly arranged at the main eccentric segment and facing the same direction;

[0012] The two auxiliary eccentric blocks are arranged on the auxiliary eccentric section, are oriented in the same direction, and are arranged in a staggered manner with the main eccentric blocks;

[0013] The transmission shaft is fixedly arranged at the end of the first shaft end and the second shaft end on the same side, and the two driving gears are installed on the transmission shaft, are engaged with each other, and are of the same size;

[0014] The driving shaft is fixedly arranged at the end of the transmission shaft of the main shaft, and a belt pulley is installed on the driving shaft, so that the motor drives the driving shaft through the belt;

[0015] The rocker connecting rod is rotationally connected to the crank section;

[0016] On the main shaft, the center axes of the transmission shaft, the driving shaft and the first shaft end are collinear;

[0017] On the auxiliary shaft, the center axes of the transmission shaft and the second shaft end are collinear.

[0018] Optionally, mounting holes are formed in the main eccentric blocks and the auxiliary eccentric blocks, the main eccentric section and the auxiliary eccentric section are located in the mounting holes, and the main eccentric blocks and the auxiliary eccentric blocks can be simultaneously rotated to the positions closest to and farthest from the bearing seat mounting surface of the main shaft and the auxiliary shaft.

[0019] Optionally, shielding sleeves are arranged between the main eccentric blocks, between the main eccentric blocks and the rocker connecting rod, between the rocker connecting rod and the bearing seat, between the auxiliary eccentric blocks, and between the auxiliary eccentric blocks and the bearing seat.

[0020] Optionally, key grooves are formed in the main eccentric section and the auxiliary eccentric section, mounting bolts are threadedly connected to the main eccentric blocks and the auxiliary eccentric blocks, and the mounting bolts are abutted against the key grooves.

[0021] Optionally, the key groove on the main shaft is located at a position closest to the center axis of the first shaft end, and the center of gravity of the main eccentric block is located at a position farthest from the center axis of the first shaft end.

[0022] The key groove on the auxiliary shaft is located at a position closest to the center axis of the second shaft end, and the center of gravity of the auxiliary eccentric block is located at a position farthest from the center axis of the second shaft end.

[0023] Optionally, the diameter of the main shaft gradually decreases from the main middle section to the main end section.

[0024] The diameter of the auxiliary shaft gradually decreases from the auxiliary middle section to the auxiliary end section.

[0025] Optionally, the radius of the main middle section of the main shaft is R1, the distance between the center axis of the main middle section of the main shaft and the center axis of the first shaft end is D1, and 0.18R1≤D1≤0.21R1.

[0026] The radius of the auxiliary middle section of the auxiliary shaft is R2, the distance between the center axis of the auxiliary middle section of the auxiliary shaft and the center axis of the second shaft section is D2, and 0.18R2≤D2≤0.21R2.

[0027] Optionally, the main shaft and the secondary shaft have the same length, and both are L;

[0028] The distance between the center of the main shaft and the plane in which the center of gravity of the main eccentric block is located and which is perpendicular to the main middle segment axis is L1, and 0.178L≤L1≤0.182L;

[0029] The distance between the center of the secondary shaft and the plane in which the center of gravity of the secondary eccentric block is located and which is perpendicular to the secondary middle segment axis is L2, and 0.368L≤L2≤0.375L.

[0030] Optionally, the rated load of the vibrating motor crankshaft vibration device is G, the weight of the main eccentric block is G1, and the weight of the secondary eccentric block is G2, and 0.0225G≤G1≤0.025G and 0.4G1≤G2≤0.45G1.

[0031] The application also provides a wind force coal separator adopting the following technical scheme:

[0032] A wind force coal separator, comprising the vibrating motor crankshaft vibration device described above, and further comprising

[0033] A base frame, the bearing seats of the vibrating motor crankshaft vibration device are all mounted on the base frame, and the base frame is further rotationally connected with a plurality of rocker arms;

[0034] A sieve bed, rotationally connected with the rocker arm connecting rods, and the rocker arms are rotationally connected with the sieve bed;

[0035] A dust suction cover, covering above the sieve bed and in communication with the negative pressure pipeline;

[0036] A plurality of air covers, covering the bottom of the sieve bed and having air pipes in communication with the bottom for air supply.

[0037] As described above, the application has at least one of the following beneficial technical effects:

[0038] 1. During the rotation of the main shaft, the vibration is generated by the centrifugal force of the main eccentric block, and the sieve bed is driven to vibrate by the rocker arm connecting rods through the eccentric rotation of the main shaft itself, the secondary shaft is driven to rotate in the opposite direction at the same angular velocity, the centrifugal force generated by the secondary eccentric block is used to increase the vibration amplitude of the sieve bed, and the centrifugal force of the main eccentric block and the secondary eccentric block is used to reduce the vibration in the left and right directions through the reverse rotation at the same angular velocity, thereby prolonging the service life of the crankshaft vibration device, and the coal production and production efficiency of the coal separator are improved through the prolongation of the service life of the crankshaft vibration device;

[0039] 2. The installation position and weight requirement of the main eccentric block on the main shaft can effectively reduce the length of the moment of the force perpendicular to the axial direction generated on the main shaft on the basis of the installation of the rocker arm connecting rod, thereby prolonging the service life of the main shaft;

[0040] 3. The installation position selection and weight requirement of the secondary eccentric block on the secondary shaft can reduce the moment length of the force perpendicular to the axial force of the secondary shaft by comprehensively considering the installation position of the primary eccentric block and the rocker arm connecting rod on the primary shaft, thereby improving the stability of the rotation of the secondary shaft and the service life of the secondary shaft. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 is a structural schematic diagram of embodiment 1 of the present application;

[0042] Figure 2 is a schematic diagram of a screening bed shown in embodiment 1 of the present application;

[0043] Figure 3 is a partial sectional view of the screening bed shown in embodiment 1 of the present application;

[0044] Figure 4 is a partial schematic diagram of the crankshaft vibration device of the vibration motor shown in embodiment 1 of the present application;

[0045] Figure 5 is a partial schematic diagram of the driving gear and the belt pulley shown in embodiment 1 of the present application;

[0046] Figure 6 is a schematic diagram of only the primary shaft and the secondary shaft shown in embodiment 1 of the present application;

[0047] Figure 7 is a schematic diagram of the installation position of the components on the primary shaft and the secondary shaft shown in embodiment 1 of the present application;

[0048] Figure 8 is a schematic diagram of the eccentricity of the primary shaft and the secondary shaft shown in embodiment 1 of the present application;

[0049] Figure 9 is a graph showing the variation trend of the centrifugal force parallel to the installation surface direction generated when the crankshaft vibration device of the vibration motor works shown in embodiment 1 of the present application;

[0050] Figure 10 is a partial exploded view of the primary eccentric block structure shown in embodiment 1 of the present application;

[0051] Figure 11 is a partial schematic diagram of the anti-loosening device shown in embodiment 2 of the present application;

[0052] Figure 12 is a partial exploded view of the anti-loosening device shown in embodiment 2 of the present application.

[0053] In the figure, 1, main shaft; 11, main middle section; 12, main eccentric section; 121, keyway; 122, shielding sleeve; 13, main transition section; 14, crank section; 141, rocker arm connecting rod; 15, main end section; 16, first shaft end; 17, transmission shaft; 171, drive gear; 18, drive shaft; 181, pulley; 2, secondary shaft; 21, secondary middle section; 22, secondary eccentric section; 23, secondary end section; 24, second shaft end; 3, main eccentric block; 31, base body; 311, mounting hole; 312, mounting bolt; 313, embedded slot; 3131, shock absorbing layer; 314, clamping groove; 315, fastening bolt; 316, fixing hole; 32, matching block; 321, anti-loosening groove; 4, secondary eccentric block; 5, chassis; 51, rocker; 52, sieve bed; 521, stepped groove; 522, air hole; 523, air port; 53, dust cover; 531, negative pressure pipeline; 54, air cover; 541, air pipe; 6, anti-loosening device; 61, fixed clamping plate; 611, fixed clamping groove; 612, edge seam; 62, clamping strip. DETAILED DESCRIPTION

[0054] The following will be described in detail with reference to the accompanying drawings. Figures 1-12 The application is further described in detail.

[0055] The embodiment of the application discloses a vibrating motor crankshaft vibration device and a wind force coal separator containing the device. Since the vibrating motor crankshaft vibration device is contained in the wind force coal separator, the following will be described starting from the wind force coal separator.

[0056] Embodiment 1: refer to Figure 1 and Figure 2 The wind force coal separator includes a chassis 5, a rocker 51, a sieve bed 52, a dust cover 53, an air pipe 541 and a vibrating motor crankshaft vibration device. The chassis 5 is horizontally arranged, and a plurality of rockers 51 are rotationally connected to the upper surface of the chassis 5. Each pair of rockers 51 is arranged at a position opposite to each other on the upper surface of the chassis 5. The sieve bed 52 is located above the chassis 5 and rotationally connected to the top end of the rocker 51. The vibrating motor crankshaft vibration device is installed on the chassis 5 and used to drive the sieve bed 52 to vibrate and sieve. The dust cover 53 is arranged above the sieve bed 52 and covers the sieve bed 52, and the dust cover 53 is in communication with the negative pressure pipeline 531 to suck and remove the dust generated during the vibration and sieving. The air cover 54 is arranged below the sieve bed 52 and covers the bottom of the sieve bed 52. The air cover 54 is in communication with the air pipe 541 to supply air to the air cover 54.

[0057] Reference Figure 2 and Figure 3The bottom of the sieve bed 52 is provided with a plurality of air outlets 523, the air outlets 523 are communicated with the air cover 54, the upper surface of the sieve bed 52 is provided with a plurality of stepped grooves 521, the stepped grooves 521 are stepped, each layer of the stepped grooves is inclined downward from the feeding port to the discharging port, and each layer of the stepped grooves is inclined from one side to the other side to the discharging port. The sieve net is laid on the stepped grooves 521, the bottom of the stepped grooves 521 is provided with a plurality of air holes 522 communicated with the air outlets 523, the air holes 522 are provided with a neck from the bottom to the top, so as to increase the flow rate of the air passing through the air holes 522.

[0058] After the coal blocks are placed on the sieve bed 52, the coal blocks are screened by the vibration of the crankshaft vibration device of the vibration motor, and the coal blocks are continuously moved from the stepped grooves 521 at the feeding port to the stepped grooves 521 at the discharging port and vibrated and sieved, wherein the coal blocks with small particles can be removed from the discharging port, and the coal blocks with large particles that cannot pass through the stepped grooves 521 are inclined to one side in the current stepped groove 521 and moved to the position of the edge of the sieve bed 52. In this screening process, the air pipe 541 is transported to the air outlet 523 through the air cover 54, and finally blown out from the air hole 522, so that the dust is raised upward and then sucked out from the dust cover 53, so as to realize the air selection coal process.

[0059] Reference Figure 4 and Figure 5 The crankshaft vibration device of the vibration motor comprises a main shaft 1, a secondary shaft 2, a main eccentric block 3, a secondary eccentric block 4 and a rocker arm connecting rod 141.

[0060] In combination with Figure 6 and Figure 7 The main shaft 1 is provided with a main middle section 11, a main eccentric section 12, a main transition section 13, a crank section 14 and a main end section 15 from the middle section to the two ends. The main middle section 11, the main eccentric section 12, the main transition section 13, the crank section 14 and the main end section 15 are concentrically arranged, and the radii decrease gradually. The two ends of the main shaft 1 are fixedly provided with a first shaft end 16, the central axis of the first shaft end 16 is not collinear with the central axis of the main shaft 1, and the first shaft end 16 is provided with a bearing seat for sleeved mounting.

[0061] The auxiliary shaft 2 has a middle section and two ends, which are auxiliary middle section 21, auxiliary eccentric section 22 and auxiliary end section 23, the center axes of the auxiliary middle section 21, the auxiliary eccentric section 22 and the auxiliary end section 23 are collinear, and the center axes of the main shaft 1 and the auxiliary shaft 2 are parallel to each other. The two ends of the auxiliary shaft 2 are fixedly provided with a second shaft end 24, and the second shaft end 24 is provided for a bearing seat to be mounted. The center axis of the second shaft end 24 is not collinear with the center axis of the auxiliary shaft 2. The bearing seats on the first shaft end 16 and the second shaft end 24 are both mounted and fixed on the chassis 5 by bolts and nuts, and the mounting surfaces are obliquely arranged, with the main shaft 1 being located above. The first shaft end 16 and the second shaft end 24 are both fixedly provided with a transmission shaft 17 at the end thereof on the same side, and the transmission shaft 17 is fixedly provided with driving gears 171 which are meshed with each other and have the same specifications. The end of the transmission shaft 17 of the first shaft end 16 is fixedly provided with a driving shaft 18, and the driving shaft 18 is mounted with a belt pulley 181 for the motor to drive the driving shaft 18 through a belt.

[0062] On the main shaft 1, the center axes of the first shaft end 16, the transmission shaft 17 and the driving shaft 18 are collinear, and the radius from the first shaft end 16 to the driving shaft 18 decreases in steps. On the auxiliary shaft 2, the center axes of the second shaft end 24 and the transmission shaft 17 are collinear, and the radius from the second shaft end 24 to the driving shaft 18 decreases in steps. The main eccentric blocks 3 and the auxiliary eccentric blocks 4 have the same structure, but different sizes and weights. The main eccentric blocks 3 are two, mounted on the main eccentric section 12, and have the same distance from the center point of the main shaft 1 and the same orientation. The auxiliary eccentric blocks 4 are two, mounted on the auxiliary eccentric section 22, and have the same distance from the center point of the auxiliary shaft 2 and the same orientation. The positions of the main eccentric blocks 3 and the auxiliary eccentric blocks 4 are staggered. The rocker arm connecting rod 141 is rotationally connected to the crank section 14, and the other end of the rocker arm connecting rod 141 is rotationally connected to the two side walls of the sieve bed 52, thereby driving the sieve bed 52 to vibrate up and down through the rocker arm connecting rod 141.

[0063] The motor drives the belt pulley 181 to rotate, and then drives the main shaft 1 to rotate through the driving shaft 18. At the same time, the main shaft 1 drives the auxiliary shaft 2 to rotate at the same angular velocity in the opposite direction through the meshing of the driving gears 171. In the process of rotating the main shaft 1, on the one hand, the center axis of the main shaft 1 is not coincident with the center of rotation of the main shaft 1, and the main shaft 1 produces eccentric rotation; on the other hand, the main eccentric blocks 3 will rotate eccentrically with the rotation of the main shaft 1 and provide greater centrifugal force, and in the process of eccentric rotation of the main shaft 1, the sieve bed 52 is provided with up and down vibration through the rocker arm connecting rod 141. The auxiliary shaft 2 drives the auxiliary eccentric blocks 4 to rotate eccentrically by rotating in the opposite direction at the same speed, and reduces the influence of the vibration generated by the eccentric rotation of the main eccentric blocks 3 on the crank vibration device through the rotation of the auxiliary eccentric blocks 4, thereby improving the service life of the vibration motor crank vibration device. The service life of the vibration motor crank vibration device is improved to improve the continuous stability of the vibration screening of the coal blocks, thereby improving the coal selection capacity and efficiency of the wind power coal selection machine.

[0064] ReferenceFigure 9 and Figure 10 The key groove 121 is located on the main eccentric section 12 and the secondary eccentric section 22. The key groove 121 on the main eccentric block 3 is located closest to the center axis of the first shaft end 16. The key groove 121 on the secondary eccentric block 4 is located farthest from the center axis of the second shaft end 24. After the main eccentric block 3 is installed, the center of gravity is located farthest from the center axis of the first shaft end 16. After the secondary eccentric block 4 is installed, the center of gravity is located farthest from the second shaft end 24. The main eccentric block 3 and the secondary eccentric block 4 can be rotated to the closest and farthest positions from the bearing seat mounting surface of the main shaft 1 and the secondary shaft 2 at the same time.

[0065] In combination Figure 6 , Figure 7 and Figure 8 The data relationship of the main shaft 1 and the secondary shaft 2 also needs to meet the following requirements:

[0066] The radius of the main middle section 11 of the main shaft 1 is R1. The distance between the center axis of the main middle section 11 of the main shaft 1 and the center axis of the first shaft end 16 is D1. The value range of D1 is 0.18R1≤D1≤0.21R1. In this embodiment, D1 is 0.2R1.

[0067] The radius of the secondary middle section 21 of the secondary shaft 2 is R2. The distance between the center axis of the secondary middle section 21 of the secondary shaft 2 and the center axis of the second shaft section is D2. The value range of D2 is 0.18R2≤D2≤0.21R2. In this embodiment, D2 is 0.2R2.

[0068] R2=0.9R1.

[0069] The length of the main shaft 1 and the secondary shaft 2 is the same, which is L. After the main eccentric block 3 is installed, the distance between the center of gravity and the center of the main shaft 1 in the plane perpendicular to the axis of the main middle section 11 is L1. L1 needs to meet the range of 0.178L≤L1≤0.182L.

[0070]

[0071] In this embodiment, L1 is 0.181L.

[0072] After the rocker connecting rod 141 is installed, the distance between the center of gravity and the center of the main shaft 1 in the plane perpendicular to the axis of the main middle section 11 is L3. L3 needs to meet the range of 0.4L≤L3≤0.42L.

[0073]

[0074] In this embodiment, L3 is 0.419L.

[0075] After the secondary eccentric block 4 is installed, the distance between the center of gravity and the center of the secondary shaft 2 in the plane perpendicular to the axis of the secondary middle section 21 is L2. L2 needs to meet the range of 0.178L≤L2≤0.182L. ​​

[0076] 0.368L≤L2≤0.375L;

[0077] In this embodiment, L2 is 0.372L.

[0078] The rated load of the vibration motor crankshaft vibration device is G, the weight of the main eccentric block 3 is G1, and the weight of the secondary eccentric block 4 is G2.

[0079] Therefore, the weight range that G1 needs to meet is:

[0080] 0.0225G≤G1≤0.025G;

[0081] Therefore, the weight range that G2 needs to meet is:

[0082] 0.4G1≤G2≤0.45G1;

[0083] The weight of the main shaft 1 is G3=0.043G, and the weight of the secondary shaft 2 is G4=0.89G3.

[0084] In this embodiment, G1 is 0.02375G, and G2 is 0.421G1.

[0085] According to the data relationship summarized by the embodiments of the present application, the widely used load data is selected as G=4000kg, then G1=85kg, G2=40kg, the corresponding L=1640mm, L1=297mm, L2=610mm, L3=687mm, the corresponding R1=72mm, D1=14.3mm, R2=65mm, D2=13mm, and the maximum frequency of the corresponding data is 50Hz, and the maximum speed is 680r / min.

[0086] Through the rated load, the appropriate weights of the main eccentric block 3 and the secondary eccentric block 4 can be calculated, and then through the selection of different materials of the main shaft 1, the radius R1 of the main middle section 11 of the main shaft 1 can be calculated according to the weight G3 of the main shaft 1 and the length L of the main shaft 1, and then the values of R2, D1 and D2 can be obtained, and the values of L1, L2 and L3 can also be obtained, so that the design of the main shaft 1 and the secondary shaft 2 and the position setting of the main eccentric block 3 and the secondary eccentric block 4 are more reasonable. Through such numerical setting, the vibration generated by the main eccentric block 3 and the secondary eccentric block 4 can improve the service life of the vibration motor crankshaft vibration device on the basis of ensuring appropriate and stable amplitude. The installation position setting of the main eccentric block 3 and the secondary eccentric block 4 can make the phase difference 0°, which can effectively reduce the influence of the eccentric rotation of the main eccentric block 3 and the secondary eccentric block 4 on the firmness and structural strength of the vibration motor crankshaft vibration device itself, reduce the vibration inertia influence in the direction parallel to the installation surface, and the service life can be improved to 10 years, which is embodied in combination with the centrifugal force curve. Figure 9 ​

[0087] Reference Figure 10 The main eccentric block 3 and the auxiliary eccentric block 4 are provided with mounting holes 311, and the main eccentric section 12 and the auxiliary eccentric section 22 are located in the mounting holes 311. Since the main eccentric block 3 and the auxiliary eccentric block 4 have the same structure, the structure of the main eccentric block 3 is described below. The main eccentric block 3 includes a base body 31 and a counterweight 32, and the mounting hole 311 is located on the base body 31. The base body 31 is threadedly connected with a fastening bolt 315 at a position opposite to the key groove 121, and the end of the fastening bolt 315 is located in and tightly fixed with the key groove 121. The two side walls of the base body 31 are provided with embedded grooves 313. The embedded grooves 313 are pasted with shock-absorbing layers 3131 made of rubber. The counterweight 32 is placed in the embedded grooves 313 for counterweighting. The side wall of the counterweight 32 and the base body 31 are provided with fixed holes 316 in communication with each other, the fixed holes 316 are inserted with mounting bolts 312, and the other ends of the mounting bolts 312 are threadedly fastened with nuts to press the counterweights 32 on both sides of the base body 31 tightly to the base body 31. The side wall of the counterweight 32 is provided with a loosening groove 321, which is an internal hexagonal type and has the same size as the mounting bolt 312 and the nut to be matched, and the end of the mounting bolt 312 and the nut to be matched are embedded in the loosening groove 321. During the embedding of the end of the mounting bolt 312 and the nut to be matched in the loosening groove 321, the shock-absorbing layer 3131 is in a pressed state.

[0088] The main eccentric block 3, the main eccentric block 3 and the rocker arm connecting rod 141, the rocker arm connecting rod 141 and the bearing seat, the auxiliary eccentric block 4, the auxiliary eccentric block 4 and the bearing seat are provided with shielding sleeves 122, the ends of the shielding sleeves 122 are tightly connected with the corresponding parts, and the two ends of the shielding sleeves 122 are further provided with thrust bearings. Further, the main shaft 1 and the auxiliary shaft 2 are protected, and the stability of the main eccentric block 3, the auxiliary eccentric block 4 and the rocker arm connecting rod 141 is effectively improved.

[0089] The installation of the base 31 is performed by inserting the fastening bolt 315 into the key groove 121, and the setting of the matching block 32 can conveniently adjust the weight of the corresponding main eccentric block 3 and the secondary eccentric block 4. When installing the matching block 32, the matching block 32 is placed in the embedded groove 313, and the installation bolt 312 is fastened with the nut by passing through the fixing hole 316. During the process of pressing the matching block 32 to the shock absorbing layer 3131 by the end of the installation bolt 312 and the nut, the end of the installation bolt 312 and the corresponding nut are embedded in the anti-loosening groove 321, thereby limiting the rotation of the installation bolt 312 and the nut. The setting of the shock absorbing layer 3131 can not only reduce the vibration effect after the installation of the matching block 32, but also make the matching block 32 tightly abut against the installation bolt 312 and the nut, and at the same time, the anti-loosening groove 321 is used to limit the rotation of the installation bolt 312 and the matched nut after being tightened, thereby achieving the anti-loosening effect. The matching block 32 generally will not be disassembled and replaced. When disassembly and replacement are needed, the two matching blocks 32 are clamped with each other by using a clamping tool such as a hydraulic clamp, and then the nut is separated from the installation bolt 312, thereby realizing the disassembly of the matching block 32.

[0090] The implementation principle of the embodiment 1 of the present application is that the motor drives the pulley 181 to rotate through the belt, thereby driving the main shaft 1 to rotate. The main shaft 1 drives the secondary shaft 2 to rotate through the driving gear 171. Under the action of the eccentric rotation of the main shaft 1 and the secondary shaft 2 and the eccentric rotation of the main eccentric block 3 and the secondary eccentric block 4, regular up-down vibration is generated, thereby driving the sieve bed 52 to vibrate and sieve the coal blocks. Under the action of the stepped groove 521 of the sieve bed 52, the lighter coal blocks can continuously move to the next stepped groove 521 and be discharged. The larger coal blocks that cannot jump over the stepped groove 521 will move along the stepped groove 521 and be discharged from one side of the sieve bed 52. The installation position and data design of the main shaft 1, the secondary shaft 2, the main eccentric block 3 and the secondary eccentric block 4 can be matched with the installation angle setting of the main eccentric block 3 and the secondary eccentric block 4, thereby reducing the centrifugal force in the non-vibration amplitude direction and the vibration interference generated during the rotation of the main eccentric block 3 and the secondary eccentric block 4. In this way, the service life of the vibration motor crankshaft vibration device is effectively improved, and the service life of the vibration motor crankshaft vibration device can be increased to about 10 years. During use, the wind power coal preparation machine can continuously and stably sieve the coal blocks, thereby improving the coal preparation yield and production efficiency of the wind power coal preparation machine.

[0091] Embodiment 2: Reference Figure 11 and Figure 12The difference between the embodiment and the implementation principle of embodiment 1 is that the fastening bolts 315 on the base 31 are two, which are located in the same key groove 121. The base 31 is provided with an anti-loosening device 6 for reducing the loosening probability of the fastening bolts 315. The anti-loosening device 6 includes a fixed clamping plate 61 and a clamping strip plate 62. The base 31 is provided with a clamping groove 314 between the positions of the two fastening bolts 315. The clamping strip plate 62 is fixedly arranged at the bottom of the fixed clamping plate 61. The fixed clamping plate 61 is provided with a fixed clamping groove 611 at both ends, which is used for abutting the side wall of the nut end of the fastening bolt 315. The clamping strip plate 62 can be fixed in the clamping groove 314 by interference fit. At this time, the fixed clamping plate 61 is located between the two fastening bolts 315, and the side wall of the nut end of the fastening bolt 315 abuts the corresponding fixed clamping groove 611. The bottom edge portion of the fixed clamping plate 61 is fixedly provided with a hem bar 612, which is made of a material having elastic deformation recovery capability, such as plastic, rubber, etc. In the embodiment, the hem bar 612 is made of rubber material. When the clamping strip plate 62 is fixed in the clamping groove 314, the hem bar 612 is clamped below the nut end of the fastening bolt 315.

[0092] Compared with embodiment 1, the difference between the implementation principle of the embodiment 2 is that one more fastening bolt 315 can more effectively improve the fixing firmness of the base 31. The position of the fixed clamping plate 61 can be fixed by placing the fixed clamping plate 61 between the two fastening bolts 315 and inserting the clamping strip plate 62 into the clamping groove 314. At this time, the fixed clamping groove 611 limits the rotation of the two fastening bolts 315, and the setting of the hem bar 612 can effectively improve the anti-loosening property of the fixed clamping plate 61. In this way, the probability of loosening and separation of the fastening bolt 315 can be effectively reduced, thereby improving the fixing firmness of the main bias block 3 and the auxiliary bias block 4.

[0093] The embodiments of the specific embodiment are the preferred embodiments of the application, but do not limit the protection scope of the application. Therefore, any equivalent changes made according to the structure, shape, principle of the application should be covered within the protection scope of the application.

Claims

1. A vibrating motor crankshaft vibration apparatus, characterized by: The utility model relates to a kind of eccentric shafts, including Main shaft (1), with middle section to two ends respectively main middle section (11), main eccentric section (12), main transition section (13), crank section (14) and main end section (15); First shaft end (16), solidly set in the two ends of main shaft (1), central axis is not collinear with the central axis of main shaft (1), bearing seat is installed with sleeve setting; Auxiliary shaft (2), with middle section to two ends respectively secondary middle section (21), secondary eccentric section (22) and secondary end section (23); Second shaft end (24), solidly set in the two ends of auxiliary shaft (2), central axis is not collinear with the central axis of auxiliary shaft (2), bearing seat is installed with sleeve setting; Main eccentric block (3), two, solidly set in main eccentric section (12), same direction; Secondary eccentric block (4), two, solidly set in secondary eccentric section (22), same direction and different direction with main eccentric block (3), and main eccentric block (3) is set in dislocation; Transmission shaft (17), solidly set in the end of first shaft end (16) and second shaft end (24) of same side, install driving gear (171), two driving gears (171) are mutually engaged and same size; Driving shaft (18), solidly set in the end of transmission shaft (17) of main shaft (1), and install pulley (181), for motor driving through belt; Rocker connecting rod (141), rotationally connected in crank section (14); On main shaft (1), transmission shaft (17), driving shaft (18) and the central axis of first shaft end (16) are collinear; On auxiliary shaft (2), transmission shaft (17) and the central axis of second shaft end (24) are collinear; The center of gravity of main eccentric block (3) is located on the position farthest from the central axis of first shaft end (16); The center of gravity of secondary eccentric block (4) is located on the position farthest from the central axis of second shaft end (24); Main eccentric block (3) and secondary eccentric block (4) can be rotated to the position closest and farthest from the bearing seat mounting surface of main shaft (1) and auxiliary shaft (2) simultaneously.

2. A vibrating motor crankshaft vibration apparatus according to claim 1, wherein: Mounting hole (311) is opened on main eccentric block (3) and secondary eccentric block (4), and main eccentric section (12) and secondary eccentric section (22) are located in mounting hole (311).

3. A vibrating motor crankshaft vibration apparatus according to claim 1, wherein: Shielding sleeve (122) is arranged between main eccentric block (3), between main eccentric block (3) and rocker connecting rod (141), between rocker connecting rod (141) and bearing seat, between secondary eccentric block (4) and between secondary eccentric block (4) and bearing seat.

4. A vibrating motor crankshaft vibration apparatus according to claim 1, wherein: Main eccentric section (12) and secondary eccentric section (22) are provided with key groove (121), and mounting bolt (312) is threadedly connected on main eccentric block (3) and secondary eccentric block (4), and mounting bolt (312) is abutted tightly with key groove (121).

5. A vibrating motor crankshaft vibration apparatus according to claim 4, wherein: The key groove (121) on main shaft (1) is located on the position closest to the central axis of first shaft end (16); The key groove (121) on auxiliary shaft (2) is located on the position closest to the central axis of second shaft end (24).

6. A vibrating motor crankshaft vibration apparatus according to claim 1, wherein: On main shaft (1), diameter gradually decreases from main middle section (11) to main end section (15); On auxiliary shaft (2), diameter gradually decreases from secondary middle section (21) to secondary end section (23).

7. A vibrating motor crankshaft vibration apparatus according to claim 1, wherein: The radius of the main shaft (1) main section (11) is R1, the distance between the center axis of the main shaft (1) main section (11) and the center axis of the first shaft end (16) is D1, then 0.18R1≤D1≤0.21R1; The radius of the main shaft (1) main section (11) is R1, the distance between the center axis of the main shaft (1) main section (11) and the center axis of the first shaft end (16) is D1, then 0.18R1≤D1≤0.21R1; 8. A vibrating motor crankshaft vibration apparatus according to claim 1, wherein: The main shaft (1) and the secondary shaft (2) are the same length, both L; The distance between the center of gravity of the main eccentric block (3) and the center of the main shaft (1) is L1, then 0.178L≤L1≤0.182L; The distance between the center of gravity of the secondary eccentric block (4) and the center of the secondary shaft (2) is L2, then 0.368L≤L2≤0.375L.

9. The vibrating motor crankshaft vibration apparatus of claim 1, wherein: The rated load of the vibration motor crankshaft vibration device is G, the weight of the main eccentric block (3) is G1, and the weight of the secondary eccentric block (4) is G2, then 0.0225G≤G1≤0.025G, 0.4G1≤G2≤0.45G1.

10. A pneumatic coal separator comprising the vibrating motor crankshaft vibrating device according to any one of claims 1-9, characterized in that: Also includes The chassis (5) is provided with a plurality of rocker arms (51), and the rocker arms (51) are rotatably connected with the sieve bed (52); The sieve bed (52) is rotatably connected with the rocker arm connecting rod (141), and the rocker arm (51) is rotatably connected with the sieve bed (52); The dust cover (53) is provided above the sieve bed (52) and is in communication with the negative pressure pipeline (531); The wind cover (54) is provided at the bottom of the sieve bed (52) and is in communication with the air pipe (541) for air supply.

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