CN202199493U - Shaft type vibrator of vibrating screen - Google Patents

Abstract

The utility model relates to a shaft type vibrator of a vibrating screen, belonging to the field of vibrating screening machines and aiming at solving the problems of leakage, high bearing temperature rise and difficult maintenance and disassembling of the current vibrator. The shaft type vibrator is composed of a bearing seat, a bearing, an eccentric shaft, an eccentric block, a shaft housing and the like; wherein a cylindrical roller bearing is installed at one end of a vibrator shaft, and a double-row self-aligning roller bearing is installed at the other end of the vibrator shaft; a round rubber sealing ring is installed at a gap position formed by a chamfering edge and a bearing cover, and the chamfering edge is intersected at the outer end face of the bearing seat and an inner hole; an oil hole for enabling communication of the inner cavity and the outer cavity of the bearing is processed on the bearing seat; a decompression oil thrower with an L-shaped cross section is sleeved at a part on a journal in contact with the bearing cover; an oil throwing surface of the oil thrower close to one end of the bearing is conical; and an oil throwing gap is kept between the oil throwing surface and an inner conical surface on the bearing cover, and the other end of the bearing and the bearing cover are sealed by using a lip-type sealing ring. The shaft type vibrator of the vibrating screen has the characteristics of stable running, good sealing, low bearing temperature rise and convenience for installation and maintenance and can be applied to the vibrating screens of various shaft type vibrators.

Description

Vibrating screen shaft vibrator

technical field

The utility model belongs to the field of vibrating screening machinery, and mainly relates to a vibrating screen shaft vibrator with no leakage, low temperature rise and good performance applied on the vibrating screen.

Background technique

The shaft vibrator used on the vibrating screen is mainly composed of bearing housing, bearing, eccentric shaft, eccentric block and shaft cover tube. The eccentric shaft is installed on the side plate of the screen box through bearings and bearing housings. The bearings generally adopt two double-row spherical roller bearings. The sealing of the vibrator is also a conventional sealing method. Because the working environment of the vibrating screen is relatively harsh, and the positions of the bearings at both ends are relatively far. After a long time of use, the sealing part is prone to oil leakage, and the expansion of the shaft also increases the temperature rise of the bearing, and there are problems of difficulty in maintenance and disassembly. The leakage of the vibrator not only affects the production, but also pollutes the environment.

Contents of the invention

The purpose of the utility model is to provide a vibrating screen shaft vibrator, which has stable operation, good sealing, low bearing temperature rise, and convenient installation and maintenance.

The utility model is achieved through the following measures. It is mainly composed of a bearing seat, a bearing, an eccentric shaft, an eccentric block and a shaft cover. It is characterized in that: a cylindrical roller bearing is installed at one end of the vibrator shaft, and a double-row self-aligning roller bearing is installed at the other end; There is a circular rubber sealing ring at the chamfer where the end face and the inner hole meet, and the gap formed by the bearing cap; the bearing seats at both ends are processed with oil holes that communicate the inner cavity and the outer cavity of the bearing. Each bearing seat The number of upper oil holes is 2-10; on the part of the journal that is in contact with the bearing cap, there is a decompression oil throwing plate with an L-shaped cross section; the oil throwing surface of the oil throwing plate near the end of the bearing is conical There is an oil throwing gap between the inner conical surface of the bearing cover, the oil throwing gap is 3-4 mm, and the other end and the bearing cover are sealed with a lip seal; the cone angle of the conical oil throwing surface It is 70-90°; there is a labyrinth ring on the journal outside the bearing cap, which forms a labyrinth seal with the bearing cap. The shaft vibrator is an shaft eccentric vibrator, a mass eccentric vibrator or a vibrator that uses shaft eccentricity and mass eccentricity at the same time.

The beneficial effect of the utility model is that the vibrator shaft is supported by cylindrical roller bearings and double-row self-aligning roller bearings, which is convenient for maintenance and disassembly, can compensate for the expansion of the eccentric shaft during operation, and reduce heat generation of the bearings. The circular rubber sealing ring between the bearing seat and the bearing cover can seal both axial and radial directions to prevent leakage. The L-shaped decompression oil throwing plate not only fixes the inner ring of the bearing, but also reduces the pressure of the oil pressure on the lip seal ring. At the same time, the oil hole on the bearing seat and the labyrinth seal on the bearing cap all play a good role in preventing the leakage of lubricating oil. Therefore, the axial vibrator has the characteristics of stable operation, good sealing, low temperature rise of the bearing and convenient installation and maintenance, and can be applied to vibrating screens of various axial vibrators.

Description of drawings

Fig. 1 is a schematic structural view of the utility model, and Fig. 2 is a partially enlarged view of A in Fig. 1 . In the figure, 1 is the pulley, 2 is the eccentric block, 3 is the eccentric shaft, 4 is the labyrinth ring, 5 is the lip seal ring, 6 is the bearing cover, 7 is the circular rubber seal ring, 8 is the decompression oil throwing plate, 9 10 is a bearing seat, 10 is a NU cylindrical roller bearing, 11 is a shaft cover, 12 is a double-row spherical roller bearing, 13 is an O-ring, 14 is a screen box side plate, and 15 is an oil hole.

Detailed ways

An embodiment of the present utility model is described below in conjunction with accompanying drawing. It is mainly composed of bearing housing, bearing, eccentric shaft, eccentric block and shaft cover. The vibrator is installed on the screen box side plate 14 of the vibrating screen through the shaft cover 11 and the bearing seat 9 . The active end of the vibrator shaft is equipped with NU cylindrical roller bearings 10, and the passive end is equipped with double-row self-aligning roller bearings 12; at the chamfer of the outer end surface of the bearing seat 9 and the inner hole, it is connected with the bearing cover 6 The formed gap position is equipped with a circular rubber sealing ring 7; the bearing seat 9 at both ends is processed with an oil hole 15 that communicates the inner cavity of the bearing with the outer cavity, and the number of oil holes 15 on each bearing seat is eight; On the part of the journal that is in contact with the bearing cap 6, a decompression oil throwing pan 8 with an L-shaped cross section is set; There is an oil throwing gap between the conical surfaces, the oil throwing gap is 3 mm, and the lip seal ring 5 is used to seal between the other end and the bearing cap 6; the cone angle of the conical oil throwing surface is 80°; the outer side of the bearing cap 6 The journal is provided with a labyrinth ring 4, which forms a labyrinth seal with the bearing cover 6. The shaft vibrator is a vibrator that uses shaft eccentricity and block eccentricity at the same time.

Claims (4)

1. a vibratory sieve shaft type vibrator mainly is made up of bearing block, bearing, eccentric shaft, eccentric block and axle cover, and it is characterized in that: the end at vibrator shaft is equipped with cylinder roller bearing ⑽, and the other end is equipped with double-row self-aligning roller bearing ⑿; At the chamfering place of bearing block ⑼ outer face and endoporus handing-over, round rubber sealing ring ⑺ is housed with the formed interstitial site of bearing cap ⑹; Be processed with the oil through ⒂ that bearing cavity and exocoel are communicated on the bearing block ⑼ at two ends; The position that on axle journal, contacts with bearing cap ⑹ is set with the L-shaped decompression disc ⑻ of cross section; Disc is conical near the pasta that gets rid of of bearing one end, and and bearing cap ⑹ on internal conical surface between leave and get rid of oil-gap, adopt lip-type packing ⑸ sealing between the other end and the bearing cap ⑹; The axle journal in the bearing cap ⑹ outside is provided with labyrinth ring ⑷, forms labyrinth sealing with bearing cap ⑹.

2. vibratory sieve shaft type vibrator according to claim 1 is characterized in that: the quantity that each bearing block ⑹ goes up oil through ⒂ is 2-10.

3. vibratory sieve shaft type vibrator according to claim 1 is characterized in that: the coning angle that taper shape gets rid of pasta is 70-90 °; The oil-gap that gets rid of that taper shape gets rid of between pasta and the last internal conical surface of bearing cap ⑹ is the 3-4 millimeter.

4. vibratory sieve shaft type vibrator according to claim 1 is characterized in that: described shaft type vibrator is the vibrator that eccentric shaft vibrator, piece eccentric type vibrator or eccentric shaft and piece off-centre are used simultaneously.

Images