Sliding bearing of lower shaft head of grader and grader

Abstract

The utility model provides a grader lower shaft head sliding bearing and a grader, the sliding bearing is used for being connected with a grader half shaft, the sliding bearing comprises a bearing box body, the bearing box body is provided with a through center hole, the center hole is used for being connected with the grader half shaft, and the sliding bearing is in clearance fit with the grader half shaft; the outer side of the bearing box body is further wrapped with a bearing sleeve. The sliding bearing is in clearance fit with the grader half shaft, small-amplitude axial movement is allowed in the operation process, stress concentration caused by ore pulp impact is reduced, bearing clamping is avoided, the flexibility and stability of equipment operation are improved, the sliding bearing is in clearance fit with the grader half shaft, the time for maintaining and replacing the bearing is shorter, and the service life of the grader is prolonged. Minerals in the grader do not need to be placed, the equipment operation efficiency is improved, and the time for overhauling and replacing the bearing is shortened.

Description

Technical Field

[0001] This application relates to the field of classifier technology, and in particular to a sliding bearing for the lower shaft of a classifier and a classifier. Background Technology

[0002] Classifiers are widely used in mineral processing plants to form closed-loop circulation processes with ball mills for classifying and diverting mineral sands, or in gravity concentrators to classify mineral sands and fine mud, as well as in metal beneficiation processes for particle size classification of slurry, and in ore washing operations for desliming and dewatering. Features include simple structure, reliable operation, convenient operation, and low energy consumption. In the beneficiation production of the Fanshan phosphate mine in Hebei Province, four 2736 ball mills and four 2FG-20 double spiral classifiers are installed and used, with a processing capacity of 216-1000 m³ / h. 3 / hour, overflow 800T / 24h, screw speed 3.6r / min, return sand volume 7780T / 24h, operating speed 21.7r / min, effective volume 17.7m³ 3 Each classifier has two spiral shafts, for a total of eight spiral shafts.

[0003] The existing classifier spiral shaft has technical defects and deficiencies in production: (1) The bearing is buried in the slurry and runs. Because the bearing seal adopts the form of packing flange, the slurry cannot be detected in time after the packing wears, resulting in the bearing wear and damage and inability to run. (2) The existing self-aligning roller bearing and the shaft are tightly matched. Installation and disassembly require heating before they can be installed and disassembled smoothly. In addition, the bearing is used in the slurry. After the seal wears, the slurry enters the bearing and accelerates the damage. When replacing the bearing, the machine needs to be stopped and the slurry in the classifier needs to be emptied. The classifier spiral shaft needs to be lifted and the two double-row self-aligning roller bearings (bearing model 22326) need to be replaced. It takes 8 hours. The bearing replacement time is long and has a significant impact on production. (3) The bearing has a service life of about 3 to 5 months, which is a short service life.

[0004] Patent CN200920032232.X discloses a lower shaft head support and sealing device for a grinding spiral classifier, including a connector, a stop lug seat, and a connecting shaft. The connector is a bearing housing, with a sealed front end and a flange at the rear end. The front section of the connecting shaft is housed inside the bearing housing via two tapered roller bearings (one and two), while the rear section is housed inside the stop lug seat, with the rear end of the connecting shaft fixedly connected to the rear end of the stop lug seat. The bearings used in this patent are tapered roller bearings, which suffer from short service life and time-consuming replacement. Therefore, it is necessary to improve existing bearings to shorten replacement time, extend service life, and improve production efficiency. Utility Model Content

[0005] The application is made in view of the above problems, and aims to provide a classifier lower shaft head sliding bearing and a classifier.

[0006] Specifically, the first aspect of the application provides a classifier lower shaft head sliding bearing, which is used in connection with a classifier half shaft, and comprises a bearing box body provided with a through central hole used in connection with the classifier half shaft, and the sliding bearing is in clearance fit with the classifier half shaft; the outer side of the bearing box body is further wrapped with a bearing sleeve.

[0007] Further, the bearing sleeve is arranged on the entire outer surface of the bearing box body.

[0008] Further, the surface of the bearing sleeve is coated with a wear-resistant coating.

[0009] Further, the top of the sliding bearing is provided with an ear.

[0010] Further, the top of the sliding bearing is provided with two ears.

[0011] Further, the sliding bearing is in detachable connection with the classifier half shaft.

[0012] Further, a fixing plate is arranged at the connection between the sliding bearing and the classifier half shaft.

[0013] The second aspect of the application provides a classifier, which comprises a classifier main shaft connected with a classifier half shaft, and a classifier lower shaft head sliding bearing connected with the classifier half shaft.

[0014] The application has the following beneficial effects:

[0015] The sliding bearing is used in connection with the classifier half shaft, and comprises a bearing box body provided with a through central hole used in connection with the classifier half shaft, and the central hole is in clearance fit with the classifier half shaft, which allows small axial movement in operation, reduces stress concentration caused by ore pulp impact, avoids bearing jamming, improves the flexibility and stability of equipment operation, and makes the maintenance and replacement of bearings shorter, improves the efficiency of equipment operation, and shortens the time for maintenance and replacement of bearings. Through optimization design, the service life of the sliding bearing can reach more than 6 months, significantly reduces the number of shutdowns, reduces maintenance costs, ensures production continuity, and improves overall economic benefits. The outer side of the bearing box body is further wrapped with a bearing sleeve, which can enhance the wear resistance and prolong the service life of the bearing sleeve. BRIEF DESCRIPTION OF DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained from these drawings without creative effort.

[0017] Figure 1 Structure diagram of the sliding bearing;

[0018] Figure 2 Structure diagram of the sliding bearing;

[0019] Figure 3 Structure diagram of the classifier half shaft;

[0020] Figure 4 Structure diagram of the connection between the head sliding bearing and the classifier half shaft;

[0021] Figure 5 Structure diagram of the application of the sliding bearing to the classifier main shaft.

[0022] Explanation of the reference signs:

[0023] 1, bearing box; 2, classifier half shaft; 3, bearing sleeve; 4, lifting lug; 5, fixed plate; 6, bolt; 7, classifier main shaft.

[0024] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application will be described and explained below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and should not be used to limit the present application. Based on the embodiments provided in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort fall within the scope of the present application.

[0026] Obviously, the drawings in the following description are only some examples or embodiments of the present application, and for those of ordinary skill in the art, the present application can be applied to other similar scenarios without creative effort. In addition, it can be understood that although the efforts made in this development process can be complex and lengthy, for those of ordinary skill in the art related to the content disclosed in the present application, some design, manufacture or production changes based on the technical content disclosed in the present application are only routine technical means and should not be understood as insufficient disclosure of the present application.

[0027] However, there are cases where unnecessary detailed description is omitted. For example, there are cases where detailed description of matters well known, repeated description of actually identical structures is omitted. This is to avoid the following description unnecessarily becoming lengthy and facilitate understanding by those skilled in the art. In addition, the drawings and the following description are provided to enable those skilled in the art to fully understand the present application and are not intended to limit the subject matter recited in the claims.

[0028] All embodiments and optional embodiments of the present application can be combined with each other to form new technical solutions if not specifically stated.

[0029] All technical features and optional technical features of the present application can be combined with each other to form new technical solutions if not specifically stated.

[0030] Reference Figures 1 to 5 , the embodiment of the first aspect of the present application provides a sliding bearing of a classifier lower shaft head, the sliding bearing is used for connecting with a classifier half shaft 2, the sliding bearing comprises a bearing box 1, the bearing box 1 is provided with a through center hole, the through center hole is used for connecting with the classifier half shaft 2, and the sliding bearing and the classifier half shaft 2 are gap fit; The outer side of the bearing box 1 is further wrapped with a bearing sleeve 3.

[0031] The sliding bearing is used for connecting with a classifier half shaft 2, the sliding bearing comprises a bearing box 1, the bearing box 1 is welded by using Q235 steel plate, the bearing box 1 is provided with a through center hole, the through center hole is used for connecting with the classifier half shaft 2, and the through center hole and the classifier half shaft 2 are gap fit, small amplitude axial movement is allowed in operation, stress concentration caused by ore pulp impact is reduced, bearing jamming is avoided, flexibility and stability of equipment operation are improved, and the sliding bearing and the classifier half shaft 2 are gap fit, so that the bearing replacement time is shorter, the mineral in the classifier does not need to be removed, the equipment operation efficiency is improved, and the bearing replacement is convenient and the time is shortened. Through optimization design, the service life of the sliding bearing can reach more than 6 months, the number of shutdowns is significantly reduced, the maintenance cost is reduced, the production continuity is ensured, and the overall economic benefit is improved. The outer side of the bearing box 1 is further wrapped with a bearing sleeve 3, the bearing sleeve 3 can enhance the wear resistance, and prolong the service life of the bearing sleeve 3.

[0032] In the embodiments of the present application, the bearing sleeve 3 is arranged on the entire outer surface of the bearing box 1. The bearing sleeve 3 is made of high-strength wear-resistant material, which can effectively resist external impact and wear and tear, and ensure that the bearing box 1 is not damaged. At the same time, the design of the bearing sleeve 3 makes it easy to disassemble and replace, further simplifying the maintenance process, reducing the difficulty of maintenance, and improving the reliability and service life of the equipment. The material of the bearing sleeve 3 can be selected according to the actual working conditions to adapt to the use requirements in different environments. Preferably, the bearing sleeve 3 is made of wear-resistant nylon, which can better resist wear and tear during friction and has a low friction coefficient.

[0033] In the embodiments of the present application, the surface of the bearing sleeve 3 is coated with a wear-resistant coating. The wear-resistant coating can use existing nanoscale materials to enhance the surface hardness, reduce friction loss, and prolong the service life of the bearing sleeve 3. The thickness of the wear-resistant coating can be adjusted according to actual needs and can be set between 0.1 and 0.5 millimeters to ensure uniform coverage of the coating and effectively improve the wear resistance.

[0034] In the embodiments of the present application, the top of the sliding bearing is provided with an ear 4. The ear 4 is used to facilitate the installation and disassembly of the sliding bearing, reduce the difficulty of manual operation, and improve the maintenance efficiency. The ear 4 is designed as a high-strength structure to ensure that it is not easily damaged during hoisting, further improving the safety and reliability of the equipment.

[0035] Referring to Figure 2 In the embodiments of the present application, the top of the sliding bearing is provided with two ears 4. The two ears 4 are symmetrically distributed to facilitate balanced hoisting, prevent the bearing from tilting, and ensure installation accuracy. The ear 4 is connected to the bearing box 1 by high-strength bolts 6, which have a stable structure and high tensile strength, further improving the safety during hoisting. The use of double ears 4 has higher stability, and the function of the double ears 4 is to increase the suspension stability of the bearing box 1, prevent tilting and vibration caused by single-point suspension, ensure the smooth operation of the bearing in the slurry, and prolong the service life.

[0036] In the embodiments of the present application, the sliding bearing and the classifier half shaft 2 are detachably connected. By adopting a detachable structure design, the connection and separation of the sliding bearing and the half shaft can be completed with simple tools, greatly shortening the replacement time and improving the convenience of equipment maintenance. The detachable connection can be bolted 6 or buckled, ensuring firm connection and easy operation. After the replacement, the bearing only needs 2 hours, and because the bearing sleeve 3 and the classifier half shaft 2 adopt a clearance fit, no other tools are needed for installation, and the time is short.

[0037] Referring to Figure 4In the embodiments of the present application, the fixed plate 5 is arranged at the connection position of the sliding bearing and the sizer half shaft 2. The fixed plate 5 is connected with the bearing and the sizer half shaft 2 through the bolt 6. The design of the fixed plate 5 not only enhances the stability of the connection, but also effectively disperses the load and prevents local stress concentration, thereby prolonging the service life of the overall structure. The fixed plate 5 is made of high-strength alloy material to ensure firm and reliable connection and prevent loosening. The fixed plate 5 is provided with a bolt 6 hole, and can also be designed as a multi-hole structure to facilitate uniform distribution of the bolt 6 and enhance the fixing effect. At the same time, the surface of the fixed plate 5 can also be coated with an anti-corrosion coating to improve durability and adapt to harsh environments.

[0038] Referring to Figure 5 The embodiments of the second aspect of the present application provide a sizer, which comprises a sizer main shaft 7 connected with a sizer half shaft 2, and a sizer lower shaft head sliding bearing connected with the sizer half shaft 2. The sizer lower shaft head sliding bearing is connected with the sizer main body through a high-strength bolt 6 to ensure the stability and durability of the overall structure. The bearing is designed with a wear-resistant coating and double lugs 4 to improve installation convenience and running stability and effectively prolong the service life of the equipment. The fixed plate 5 enhances the firmness of the connection, and the anti-corrosion coating adapts to harsh environments, further improving the overall performance of the sizer.

[0039] It should be noted that the present application is not limited to the above-mentioned embodiments. The above-mentioned embodiments are only examples, and embodiments having the same technical idea and playing the same role and effect within the scope of the technical solutions of the present application are all included in the technical scope of the present application. In addition, within the scope of the main idea of the present application, various modifications of the embodiments that can be thought of by those skilled in the art, as well as other ways constructed by combining part of the components in the embodiments, are also included in the scope of the present application.

Claims

1. A classifier lower shaft head plain bearing, characterized in that The sliding bearing is used for connecting with the classifier half shaft (2), the sliding bearing comprises a bearing box (1), the bearing box (1) is provided with a through central hole, the central hole is used for connecting with the classifier half shaft (2), and the sliding bearing is clearance fit with the classifier half shaft (2);The outer side of the bearing box (1) is further wrapped with a bearing sleeve (3).

2. The classifier lower shaft head plain bearing according to claim 1, characterized in that The bearing sleeve (3) is arranged on the entire outer surface of the bearing box (1).

3. The classifier lower shaft head plain bearing according to claim 1, characterized in that The surface of the bearing sleeve (3) is coated with a wear-resistant coating.

4. The classifier lower shaft head plain bearing according to claim 1, characterized in that The top of the sliding bearing is provided with an ear (4).

5. The classifier lower shaft head plain bearing according to claim 1, characterized in that The top of the sliding bearing is provided with two ears (4).

6. The classifier lower shaft head plain bearing according to claim 1, characterized in that The sliding bearing is detachably connected with the classifier half shaft (2).

7. The classifier under shaft head plain bearing according to claim 1, characterized in that The sliding bearing is provided with a fixing plate (5) at the connection with the classifier half shaft (2).

8. A classifier characterized by, The classifier main shaft (7) is connected with the classifier half shaft (2), and the classifier lower shaft head sliding bearing of any one of claims 1 to 7 is connected with the classifier half shaft (2).

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