CN215088607U - Vibration exciter - Google Patents

Abstract

The utility model discloses a vibration exciter, including the main shaft, be equipped with bearing and a plurality of eccentric block on the main shaft, the eccentric block sets up in the bearing both sides, be equipped with the packing chamber on the eccentric block, fill the intracavity and irritate the filler, fill the chamber to the bearing direction protrusion. The utility model increases the vibration amplitude of the vibration exciter under the same volume by filling the eccentric block with the filler; the eccentric block extends axially, so that the space utilization rate is improved, and the amplitude of the vibration exciter is increased; a labyrinth seal structure is arranged to increase the sealing property and ensure the normal operation of the bearing; the modular design is adopted, the cost is low, the maintenance is convenient, and the eccentric block can be continuously added; the amplitude of the vibration exciter is adjusted by changing the position and the quantity of the eccentric block or the eccentric plate; the bearing has long service life and more stable operation.

Description

Vibration exciter

Technical Field

The utility model belongs to the technical field of the shale shaker technique and specifically relates to a vibration exciter is related to.

Background

The vibration exciter is an important part using mechanical vibration. The vibration exciter can make the excited object obtain a certain form and magnitude of vibration, and can realize the work of conveying, screening, compacting and forming materials or objects, tamping soil gravels and the like. The main shaft of the vibration exciter rotates in the bearing, meanwhile, the eccentric block is driven to rotate, and the components such as the sieving device and the like are excited to vibrate through the generated rotational inertia. Traditional vibration exciter adopts simple steel piece off-centre, disposes a single-row roller bearing, thereby adjusts the size of excitation force through adjusting the eccentric distance that the angle between the eccentric block adjusted the vibration exciter, for increase vibration exciter amplitude, usually through the eccentric distance that constantly increases the vibration exciter to the eccentric block increase vibration exciter on the main shaft, but can lead to the vibration exciter volume too big like this to the bearing also generates heat easily and damages.

For example, an "amplitude adjustable vibration exciter" disclosed in chinese patent literature, whose publication No. CN208894554U, includes a sub eccentric mass, a main eccentric mass, a shaft, a bearing seat, and a bearing; the two ends of the shaft are provided with an auxiliary eccentric block and a main eccentric block, the auxiliary eccentric block is arranged on the outer side of the main eccentric block, and the auxiliary eccentric block and the main eccentric block are coaxially arranged; the main eccentric block is sleeved on the shaft, the auxiliary eccentric block is tightly connected with the main eccentric block, and an included angle between the auxiliary eccentric block and the main eccentric block is adjustable; a bearing is arranged on the periphery of the middle part of the shaft, and a bearing seat is arranged on the periphery of the bearing; bearing caps are arranged at two ends of the bearing and connected with the bearing seat. The utility model discloses a through setting up main eccentric block of angularly adjustable and vice eccentric block and being used for adjusting the amplitude, its weak point is, and eccentric moment is the biggest when main eccentric block coincides with vice eccentric block, and the amplitude is the biggest promptly, if will continue to increase the amplitude and must increase the eccentric block, can cause the vibration exciter bulky, and easily cause the bearing to generate heat and damage.

Disclosure of Invention

The utility model relates to an overcome prior art's vibration exciter amplitude undersize, the too big problem of occupation space provides a vibration exciter, increases the amplitude, and occupation space is less.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

the vibration exciter comprises a main shaft, wherein a bearing and a plurality of eccentric blocks are arranged on the main shaft, the eccentric blocks are arranged on two sides of the bearing, a filling cavity is formed in each eccentric block, a filler with the density larger than that of each eccentric block is arranged in each filling cavity, and each filling cavity protrudes towards the bearing.

The utility model is characterized in that the filler is arranged in the eccentric block, and the density of the filler is larger than the original material steel of the eccentric block, so that the mass of the eccentric block is larger in the same volume, and the generated eccentric moment is larger; on the other hand, because two eccentric blocks are separated by the bearing, form certain space between the two, utilize this space, extend eccentric block filling cavity to this space in, increase filling cavity volume when guaranteeing that the vibration exciter volume is unchangeable to increase the eccentric moment that eccentric block produced, the vibration exciter amplitude is bigger.

Preferably, a bearing end cover is arranged outside the bearing, and a sealing cover is connected outside the bearing end cover through a labyrinth sealing structure.

The vibration exciter bearing is filled with the grease usually and is used for increasing the lubrication, promotes the bearing life-span, seals the bearing in bearing end cover and sealed lid through setting up labyrinth seal structure, avoids the grease to spill, avoids external dust to get into in the bearing simultaneously.

Preferably, the main shaft is provided with a baffle plate, and the baffle plate is fixedly arranged on one side of the eccentric block, which is far away from the bearing.

The baffle plates are arranged to axially fix the eccentric blocks, and more eccentric blocks and eccentric plates can be arranged outside the baffle plates.

Preferably, the main shaft is provided with an eccentric plate, and the eccentric plate is detachably connected to one side of the baffle plate far away from the eccentric block.

The eccentric moment is further increased by arranging the eccentric plates outside the baffle plates, and the eccentric plates can be added according to requirements.

Preferably, the baffle is provided with a plurality of fixing holes, the distances from the fixing holes to the main shaft are the same, and the eccentric plate is provided with mounting holes corresponding to the fixing holes.

The installation hole on the eccentric plate and the baffle plate can adjust the included angle between the eccentric plate and the eccentric block after being correspondingly fixed at different positions, the amplitude is maximum when the amplitude is 0 degrees, and the amplitude is minimum when the amplitude is 180 degrees. Modular design, with low costs, easy maintenance.

Preferably, the vibration exciter further comprises a housing covering the vibration exciter, and the housing is an aluminum alloy casting.

The housing is used for preventing dust, and the aluminum alloy material lightens weight when guaranteeing housing intensity.

Preferably, the bearing is a double row self-aligning roller bearing.

The double-row self-aligning roller bearing has long service life and more stable operation.

Therefore, the utility model discloses following beneficial effect has: (1) filling fillers with density larger than that of steel in the eccentric block to increase the amplitude of the vibration exciter in the same volume; (2) the eccentric block extends axially, so that the space utilization rate is improved, and the amplitude of the vibration exciter is increased; (3) a labyrinth seal structure is arranged to increase the sealing property and ensure the normal operation of the bearing; (4) the modular design is adopted, the cost is low, the maintenance is convenient, and the eccentric block can be continuously added; (5) the vibration exciter amplitude is adjusted by changing the positions of the eccentric blocks and the eccentric plates or increasing and reducing the number of the eccentric plates; (6) the bearing has long service life and more stable operation.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention used for a sieve box.

In the figure: 1. the device comprises a main shaft, 11, a flat key, 2, a bearing, 21, a bearing end cover, 22, a sealing cover, 3, an eccentric block, 31, a filling cavity, 4, a baffle, 5, an eccentric plate, 6, a housing, 7, a screen box, 8 and a universal coupling.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1 and 2, the vibration exciter comprises a main shaft 1, two bearings 2 are arranged on the main shaft 1, the bearings 2 are double-row self-aligning roller bearings, a fixing ring is arranged between the two bearings 2, a bearing end cover 21 is arranged on the outer side of each bearing 2, and a sealing cover 22 is connected to the outer side of each bearing end cover 21 through a labyrinth sealing structure. The outer sides of the two bearings 2 are respectively provided with an eccentric block 3, the eccentric block 3 is fixedly connected with the main shaft 1 through a flat key 11, a filling cavity 31 is arranged in the eccentric block 3, a filler is arranged in the filling cavity 31, the density of the filler is greater than that of the eccentric block, and the filling cavity 31 protrudes towards the bearing 2 along the axial direction. The main shaft 1 is provided with a baffle 4, and the baffle 4 is fixedly arranged on one side of the eccentric block 3 far away from the bearing 2. An eccentric plate 5 is arranged on the main shaft 1, and the eccentric plate 5 is detachably connected to one side, far away from the eccentric block 3, of the baffle plate 4. Be equipped with a plurality of fixed orificess on the baffle 4, the fixed orifices is the same to 1 distance of main shaft, is equipped with the mounting hole that corresponds with the fixed orifices on the eccentric plate 5, and the bolt passes mounting hole and fixed orifices and fixes together eccentric plate 5 and baffle 4. The vibration exciter housing is provided with a housing 6, and the housing 6 is an aluminum alloy casting.

The filling density in the eccentric block is greater than the filler of the original material steel of the eccentric block, so that the eccentric block has larger mass in the same volume, and the generated eccentric moment is larger; because two eccentric weights are separated by the bearing, form certain space between the two, utilize this space, fill the chamber with the eccentric weight and extend to this space in, increase and fill the chamber volume when guaranteeing that the vibration exciter volume is unchangeable to increase the eccentric moment that the eccentric weight produced, the vibration exciter amplitude is bigger. The labyrinth seal structure is used for preventing grease from leaking and dust. The baffle is used for fixing the eccentric block from the outside, and the baffle outside sets up the eccentric slab, and the eccentric slab is less with the eccentric block contained angle, and the eccentric moment of vibration exciter is big more, and the amplitude is big more. The amplitude is adjusted by increasing or decreasing the eccentric plate and adjusting the angle of the eccentric plate and the eccentric block.

When the vibrating screen is used, as shown in fig. 2, the main shaft is connected with a universal coupling 8, the housing is fixedly connected with the screen box 7, the main shaft rotates to drive the eccentric block and the eccentric plate to rotate, and the eccentric moment generated by the rotation of the main shaft excites the screen box to vibrate.

Claims (7)

1. The utility model provides a vibration exciter, includes main shaft (1), is equipped with bearing (2) and a plurality of eccentric block (3) on main shaft (1), and eccentric block (3) set up in bearing (2) both sides, characterized by, be equipped with in eccentric block (3) and fill chamber (31), be equipped with the filler that density is greater than eccentric block (3) density in filling chamber (31), it is protruding to bearing (2) direction to fill chamber (31).

2. The vibration exciter according to claim 1, characterized in that a bearing end cover (21) is arranged outside the bearing (2), and a sealing cover (22) is connected outside the bearing end cover (21) through a labyrinth structure.

3. The vibration exciter according to claim 1, characterized in that a baffle (4) is arranged on the main shaft (1), and the baffle (4) is fixedly arranged on one side of the eccentric block (3) far away from the bearing (2).

4. The vibration exciter according to claim 3, characterized in that an eccentric plate (5) is arranged on the main shaft (1), and the eccentric plate (5) is detachably connected to the side of the baffle plate (4) far away from the eccentric block (3).

5. The vibration exciter according to claim 4, characterized in that the baffle (4) is provided with a plurality of fixing holes, the distance from the fixing holes to the main shaft (1) is the same, and the eccentric plate (5) is provided with mounting holes corresponding to the fixing holes.

6. An exciter according to claim 1, further comprising a housing (6) covering the exciter, wherein said housing (6) is an aluminum alloy casting.

7. An exciter according to claim 1, wherein the bearing (2) is a double row self aligning roller bearing.

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