CN215567396U

CN215567396U - Eccentric block vibration exciter for vibrating screen

Info

Publication number: CN215567396U
Application number: CN202121149725.9U
Authority: CN
Inventors: 刘海淘; 刘志君
Original assignee: Henan Zhongyu Dingli Intelligent Equipment Co ltd
Current assignee: Henan Zhongyu Dingli Intelligent Equipment Co ltd
Priority date: 2021-05-27
Filing date: 2021-05-27
Publication date: 2022-01-18
Anticipated expiration: 2031-05-27

Abstract

The utility model provides an eccentric block vibration exciter for a vibrating screen, which comprises a main shaft, a bearing seat, a first bearing and a second bearing, wherein a tubular bearing spacer sleeve is fixed on the inner wall of the bearing seat, the first bearing and the second bearing are arranged at two ends of the bearing spacer sleeve, an oil storage cavity is enclosed among the bearing spacer sleeve, the main shaft, the first bearing and the second bearing, and an oil filling hole is arranged on the side wall of the oil storage cavity. According to the eccentric block vibration exciter for the vibrating screen, the oil storage cavity is formed, lubricating oil can be injected into the oil storage cavity, and when the vibrating screen works, the lubricating oil in the oil storage cavity automatically diffuses and permeates into the bearings on two sides under the action of gravity, so that self-lubrication of the bearings is realized. Because the oil storage cavity can store a large amount of lubricating oil, frequent oil injection through the oil injection hole is not needed any more, the oil injection period is prolonged, the oil injection frequency is reduced, and the risk of oil shortage of the bearing is reduced.

Description

Eccentric block vibration exciter for vibrating screen

Technical Field

The utility model belongs to the technical field of vibrating screens, and particularly relates to an eccentric block vibration exciter for a vibrating screen.

Background

The vibrating screen is widely applied to the industries of sandstone aggregates, mines, metallurgy, chemical engineering and the like. The vibration exciter is used as the most important part of the vibrating screen, and the performance of the vibration exciter is directly related to the use performance of the vibrating screen equipment. Because the bearing of the vibration exciter of the vibrating screen needs to be lubricated, the structure of the eccentric block vibration exciter for the vibrating screen in the prior art is shown in figure 1 and comprises an inner eccentric block 1, an outer eccentric block 2, a first bearing 3 and a second bearing 4. An oil filling hole 5 is provided between the first bearing 3 and the second bearing 4, and the lubricating oil injected from the oil filling hole 5 directly flows into the first bearing 3 and the second bearing 4, respectively, for lubrication. Since the amount of oil stored in the oil filler hole 5 is small, it is necessary to frequently fill the oil. Due to the high frequency of the injected lubricating oil and the negligence of customers, the lubricating oil is often forgotten to be injected or is not injected in time, so that the bearing cannot be normally lubricated, the service life of the bearing is damaged if the lubricating oil is slightly injected, the bearing is locked if the lubricating oil is heavy, and the bearing and the main shaft 7 are completely scrapped.

SUMMERY OF THE UTILITY MODEL

The purpose of the utility model is: the eccentric block vibration exciter for vibrating screen can reduce the lubricating frequency of the bearing.

The technical scheme of the utility model is as follows:

the utility model provides an eccentric block vibration exciter for shale shaker, includes main shaft, bearing frame, first bearing and second bearing, be fixed with pipy bearing spacer sleeve on the bearing frame inner wall, first bearing with the second bearing sets up bearing spacer sleeve both ends, the bearing spacer sleeve the main shaft first bearing with enclose synthetic oil storage cavity between the second bearing, be provided with the oil filler point on the oil storage cavity lateral wall.

Preferably, the dimension of the oil storage cavity along the length direction of the main shaft is 0.5-5 times of the width of the first bearing, and the widths of the first bearing and the second bearing are the same.

Preferably, the dimension of the oil storage cavity along the length direction of the main shaft is 2 times of the width of the first bearing.

Preferably, the outer sides of the first bearing and the second bearing are respectively provided with a sealing mechanism; the sealing mechanism comprises a framework oil seal, a transparent cover, an inner labyrinth sealing cover, an outer gland and an outer labyrinth sealing cover which are arranged from the first bearing or the second bearing to the outside in sequence; the opposite surfaces of the transparent cover and the inner labyrinth sealing cover are labyrinth structures which are embedded into each other; a lining is arranged between the transparent cover and the main shaft, the lining and the inner labyrinth sealing cover are mutually pressed, and a first gap is formed between the inner labyrinth sealing cover and the transparent cover; the outer edge of the transparent cover is provided with a threaded hole, the outer gland and the transparent cover are in threaded connection at the threaded hole, and opposite surfaces of the outer gland and the outer labyrinth seal cover are of mutually embedded labyrinth structures; the outer labyrinth seal cover and the inner labyrinth seal cover are mutually pressed, and a second gap is formed between the outer gland and the inner labyrinth seal cover.

Preferably, the outer surface of the outer gland is a conical surface.

The utility model has the beneficial effects that: according to the eccentric block vibration exciter for the vibrating screen, the oil storage cavity is formed, lubricating oil can be injected into the oil storage cavity, and when the vibrating screen works, the lubricating oil in the oil storage cavity automatically diffuses and permeates into the bearings on two sides under the action of gravity, so that self-lubrication of the bearings is realized. Because the oil storage cavity can store a large amount of lubricating oil, frequent oil injection through the oil injection hole is not needed any more, the oil injection period is prolonged, the oil injection frequency is reduced, and the risk of oil shortage of the bearing is reduced.

Drawings

Fig. 1 is a schematic structural view of an eccentric block vibration exciter for a vibrating screen in the prior art.

Fig. 2 is a schematic structural view of an eccentric block vibration exciter for a vibrating screen according to the present invention.

Fig. 3 is an enlarged view of fig. 2 at a.

In the figure: 1. an inner eccentric block; 2. an outer eccentric mass; 3. a first bearing; 4. a second bearing; 5. an oil filler hole; 6. an oil storage chamber; 7. a main shaft; 8. a bearing seat; 9. a bearing spacer sleeve; 10. 11, a sealing mechanism; 12. an outer labyrinth seal cover; 13. an outer gland; 14. an inner labyrinth seal cover; 15. a transparent cover; 16. framework oil seal; 17. a bushing; 18. a first gap; 19. a second gap; 20. a threaded bore.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a schematic structural view of an eccentric block vibration exciter for a vibrating screen according to the present invention. As shown in fig. 2, the eccentric block vibration exciter for the vibrating screen comprises a main shaft 7, a bearing seat 8, a first bearing 3 and a second bearing 4, wherein a tubular bearing spacer 9 is fixed on the inner wall of the bearing seat 8, the first bearing 3 and the second bearing 4 are arranged at two ends of the bearing spacer 9, an oil storage cavity 6 is enclosed among the bearing spacer 9, the main shaft 7, the first bearing 3 and the second bearing 4, and an oil filling hole 5 is formed in the side wall of the oil storage cavity 6.

After the manufacture of the vibrating screen is completed, the oil storage cavity 6 is filled, preferably full, with lubricating oil through the oil filling hole 5. When the vibrating screen works, lubricating oil in the oil storage cavity 6 can automatically diffuse and permeate into the first bearing 3 and the second bearing 4 on two sides under the action of gravity, so that self-lubrication of the first bearing 3 and the second bearing 4 is realized. Because the oil storage cavity can store a large amount of lubricating oil, frequent oil injection through the oil injection hole is not needed any more, the oil injection period is prolonged, the oil injection frequency is reduced, and the risk of oil shortage of the bearing is reduced.

Preferably, the dimension of the oil storage cavity 6 along the length direction of the main shaft 7 is 0.5-5 times of the width of the first bearing 3, and the widths of the first bearing 3 and the second bearing 4 are the same. The oil storage cavity 6 with the bearing width of 0.5-5 times can also provide more lubricating oil storage space; meanwhile, the stability of the main shaft 7 is also improved by the two bearing structures which are far away from each other. More preferably, the dimension of the oil storage cavity 6 along the length direction of the main shaft 7 is 2 times the width of the first bearing 3.

Preferably, the outer sides of the first bearing 3 and the second bearing 4 are respectively provided with a

sealing mechanism

10, 11; fig. 3 is an enlarged view of a portion a of fig. 2, and as shown in fig. 2 and 3, the sealing mechanism includes a skeleton oil seal 16, a transparent cover 15, an inner labyrinth seal cover 14, an outer pressure cover 13 and an outer labyrinth seal cover 12 which are arranged in sequence from the first bearing 3 or the second bearing 4 to the outside; the opposite surfaces of the transparent cover 15 and the inner labyrinth sealing cover 14 are labyrinth structures embedded with each other; a bush 17 is arranged between the transparent cover 15 and the main shaft 7, the bush 17 and the inner labyrinth seal cover 14 are mutually pressed, and a first gap 18 is formed between the inner labyrinth seal cover 14 and the transparent cover 15; the outer edge of the transparent cover 15 is provided with a threaded hole 20, the outer gland 13 and the transparent cover 15 are in threaded connection at the threaded hole 20, and the opposite surfaces of the outer gland 13 and the outer labyrinth seal cover 12 are of mutually embedded labyrinth structures; the outer labyrinth seal cover 12 and the inner labyrinth seal cover 14 are pressed against each other, and a second gap 19 is formed between the outer gland 13 and the inner labyrinth seal cover 14.

In the sealing mechanism, the labyrinth is formed between the inner labyrinth cover 14 and the through cover 15, even if a small amount of lubricating oil seeps out through a gap between the main shaft 7 and the first bearing 3, when the lubricating oil seeps out through the first gap 18, the lubricating oil firstly seeps into the first gap 18, an oil seal is formed in the first gap 18, the oil seepage of capillary action is blocked, and the surface tension of the lubricating oil prevents the lubricating oil from further seeping out. Even if a small amount of lubricating oil continues to leak, the labyrinth seal between the inner labyrinth cover 14 and the through cover 15 lengthens the path of the leakage and further forms an oil seal. The sealing mechanism of the present invention further comprises an outer labyrinth seal cover 12 and an inner labyrinth seal cover 14, a second gap 19 is formed between the outer labyrinth seal cover 12 and the inner labyrinth seal cover 14 to block the oil liquid seepage of capillary action, and the labyrinth seal between the outer gland cover 13 and the inner labyrinth seal cover 14 prolongs the seepage path and further forms an oil seal. Therefore, the sealing mechanism of the utility model can play a good sealing role, prevent the lubricating oil in the oil storage cavity 6 from leaking, and simultaneously effectively prevent dust from entering the bearing chamber.

Preferably, the outer surface of the outer gland 13 is a conical surface. The outer surface of the conical surface can prevent dust accumulation.

The above embodiments are described to help understanding of the present invention, but are not to be construed as limiting the present invention. In addition, the respective technical features of the present invention described above may be combined with each other as long as they do not conflict with each other. In addition, the above embodiments are only some embodiments of the present invention, not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work based on the embodiments of the present invention belong to the protection scope of the present invention.

Claims

1. The utility model provides an eccentric block vibration exciter for shale shaker, includes main shaft, bearing frame, first bearing and second bearing, its characterized in that, be fixed with pipy bearing spacer sleeve on the bearing frame inner wall, first bearing with the second bearing sets up bearing spacer sleeve both ends, the bearing spacer sleeve the main shaft first bearing with enclose synthetic oil storage cavity between the second bearing, be provided with the oil filler point on the oil storage cavity lateral wall.

2. The eccentric mass exciter for a vibrating screen according to claim 1, wherein the size of the oil storage cavity in the length direction of the main shaft is 0.5 to 5 times the width of the first bearing, and the first bearing and the second bearing have the same width.

3. The eccentric mass exciter of claim 2, wherein the oil storage cavity has a dimension in the length direction of the main shaft of 2 times the width of the first bearing.

4. The eccentric mass exciter for a vibrating screen according to claim 2, wherein the first bearing and the second bearing are respectively provided with a sealing mechanism at the outer side thereof; the sealing mechanism comprises a framework oil seal, a transparent cover, an inner labyrinth sealing cover, an outer gland and an outer labyrinth sealing cover which are arranged from the first bearing or the second bearing to the outside in sequence; the opposite surfaces of the transparent cover and the inner labyrinth sealing cover are labyrinth structures which are embedded into each other; a lining is arranged between the transparent cover and the main shaft, the lining and the inner labyrinth sealing cover are mutually pressed, and a first gap is formed between the inner labyrinth sealing cover and the transparent cover; the outer edge of the transparent cover is provided with a threaded hole, the outer gland and the transparent cover are in threaded connection at the threaded hole, and opposite surfaces of the outer gland and the outer labyrinth seal cover are of mutually embedded labyrinth structures; the outer labyrinth seal cover and the inner labyrinth seal cover are mutually pressed, and a second gap is formed between the outer gland and the inner labyrinth seal cover.

5. The eccentric mass exciter of claim 4, wherein the outer surface of the outer cover is a tapered surface.