CN1995772A - Large-sized sleeve bearing thrust-face reverse-lubricating and lubricating oil cooling method - Google Patents

Abstract

The invention relates to a large-scale sliding bearing thrust surface reverse lubrication and lubricating oil cooling method in the technical field of bearings. In the present invention: the lubricating oil brought in by the impeller of the oil throwing pan on the left and the oil scraper is provided to the thrust surface on the right through the oil inlet pipe on the left; The pipeline provides the thrust surface on the left; the lubricating oil lubricates the bearing bush and the thrust surface and flows into the oil pool through the oil return pipeline, and the lubricating oil flowing into the oil pool is effectively cooled by the cooler to ensure the thrust of the bearing when it is tilted. The surface is fully lubricated and cooled to form a continuous oil film. The invention can ensure that the bearing bush forms continuous and stable oil film lubrication in an inclined state, improves the reliability of the bearing, and avoids losses caused by bearing faults in large equipment such as large ball mills, rotary kilns, ship propulsion motors and coolers.

Description

Reverse Lubrication and Lubricant Oil Cooling Method of Thrust Surface of Large Sliding Bearing

technical field

The invention relates to a method in the technical field of bearings, in particular to a method for reverse lubrication and cooling of lubricating oil on the thrust surface of a large sliding bearing, which is used in the field of manufacturing large sliding bearings working under inclined conditions.

Background technique

Large sliding bearings are widely used in large rotary machinery, such as large ball mills, rotary kilns, ship propulsion motors, coolers, etc. For this type of bearing with heavy load and low speed, especially under the working conditions of non-horizontal installation, establishing a safe and reliable lubricating oil film sliding protection is the focus of research in recent years. A lot of research has been done on low-speed sliding bearings at home and abroad, and some design schemes have been proposed, including mechanical lubrication methods for large sliding bearings and self-lubricating methods for bearings. In order to ensure the reliability and effectiveness of the bearing, a mechanical oil supply method is adopted, that is, to use the oil hanging plate assembled on the main shaft and rotate with the main shaft to supply oil to the bearing bush and the thrust surface.

After searching the prior art documents, it is found that the Chinese Patent Publication No.: CN1834487, patent name: "Large Diameter Low Speed Sliding Bearing Mechanical Lubricating Device". This patent relates to a mechanical oil supply lubricating device for large sliding bearings. The bearing cover is provided with an oil inlet pipe and an oil return pipe that communicate with the bearing seat. The oil inlet pipe communicates with the oil delivery pipe, and the oil return pipe directly communicates with the oil storage tank. There is a cooler inside. Although this arrangement provides an efficient mechanical oil supply lubrication arrangement which reduces the complexity of the bearing and increases its effectiveness, however, the lubrication arrangement does not involve the thrust of large low-speed plain bearings in non-horizontal installation operating conditions Surface lubrication and oil cooling methods. For the lubrication and lubricating oil cooling of the thrust surface of large low-speed sliding bearings working under inclined conditions, there are no public reports at home and abroad.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art of large-scale sliding bearing lubrication and lubricating oil cooling, and provide a large-scale sliding bearing thrust surface reverse lubrication and lubricating oil cooling method. The invention aims at large-scale sliding bearings under non-horizontal installation working conditions, can ensure sufficient lubrication, good cooling effect, and can prolong the service life of the bearings.

The present invention is realized through the following technical solutions. For large sliding bearings, in order to effectively lubricate and cool the thrust surface of the bearing pad working in a non-horizontal state, the present invention adopts the method of reverse oil supply lubrication and separation of cold and hot lubricating oil , that is, the lubricating oil brought in by the left oil flinger impeller and oil scraper is supplied to the right thrust surface through the left oil inlet pipe, on the contrary, the lubricating oil brought in by the right oil flinger impeller and oil scraper passes through the right oil inlet The pipeline is provided to the thrust surface on the left; after the lubricating oil lubricates the bearing bush and the thrust surface, it is effectively cooled through the oil return circuit and then participates in the lubrication cycle again to ensure that the thrust surface of the bearing is fully lubricated and forms a continuous oil film when the bearing is tilted.

Concrete steps of the present invention are as follows:

(1) The mechanical oil supply device brings the mechanical lubricating oil from the oil pool of the bearing seat to the top of the bearing bush;

(2) The right hanging oil plate guides the mechanical lubricating oil into the right oil inlet pipe (the left hanging oil plate guides the lubricating oil into the left oil inlet pipe);

(3) The lubricating oil entering the right oil inlet pipe uses gravity and centrifugal force to divide the lubricating oil in the oil inlet pipe: a part uses gravity to guide the lubricating oil into the bearing pad surface for bearing pad lubrication, and a part uses centrifugal force to lubricate the left thrust surface;

(4) The lubricating oil entering the left oil inlet pipe uses gravity and centrifugal force to divide the lubricating oil in the oil inlet pipe: one part uses gravity to guide the lubricating oil into the bearing pad surface for bearing pad lubrication, and the other part uses centrifugal force to lubricate the right thrust surface;

(4) The lubricating oil lubricates the bearing bush and the thrust surface respectively, and then flows into the oil pool of the bearing seat through the oil return pipeline;

(5) The lubricating oil flowing into the oil pool and the lubricating oil not participating in the circulation are cooled by the cooler to realize the separation of cold and hot oil;

(6) The lubricating oil after cooling participates in the lubrication cycle again.

The implementation of the invention solves a technical problem in the field of mechanical lubrication of large-scale low-speed self-lubricating sliding bearings at home and abroad, and the method of thrust surface lubrication and cooling of large-scale sliding bearings under inclined working conditions can be improved by using the invention. Use the oil supply device that rotates with the shaft to carry out reverse lubrication on the thrust surface and effective cooling of the lubricating oil, which can ensure the continuous and stable oil film lubrication of the bearing pad in the tilted state, improve the reliability of the bearing, and avoid large ball mills, rotary kilns, Loss of large equipment such as ship propulsion motors and coolers due to bearing failure.

Description of drawings

Fig. 1 is a schematic diagram of the cooling mode of the lubrication method involved in the present invention.

Fig. 2 is a schematic diagram of the left thrust surface lubrication method involved in the present invention.

Fig. 3 is a schematic diagram of the method for lubricating the right thrust surface of the present invention.

Fig. 4 is a schematic diagram of the cooling method involved in the present invention.

Detailed ways

The embodiments of the present invention are described in detail below in conjunction with the accompanying drawings: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and processes are provided, but the protection scope of the present invention is not limited to the following implementations example.

As shown in Figure 1, in the method of lubricating and lubricating oil cooling in non-horizontal working conditions involved in this embodiment, the left and right symmetrical oil thrower impeller 1 installed on the main shaft rotates with the shaft, and the lubricating oil is drawn from the bearing oil pool 2 After being brought into the top of the bearing bush 3, the oil scraper 4 is respectively introduced into the left and right oil inlet pipes 5, and the thrust surface 6 of the bearing bush and the inner diameter of the bearing bush 3 are lubricated by gravity and centrifugal force, and the lubricating oil lubricates the bearing bush and the thrust surface through the oil return pipe 7 Into the bearing oil pool 2, together with the lubricating oil not participating in the lubrication, the lubricating oil flowing into the oil pool is cooled by the cooler 8, and then participates in the lubrication cycle again.

As shown in Figures 2 and 3, this embodiment adopts the cooling method of reverse oil supply lubrication and separate cold and hot oil: the lubricating oil brought in by the left oil flinger impeller 1 and oil scraper 4 is provided to the Thrust surface 6 on the right; on the contrary, the lubricating oil brought in by the impeller 1 and scraper plate 4 on the right is provided to the thrust surface 6 on the left through the oil inlet pipe 5 on the right; the lubricating oil lubricates the bearing bush 3 and the thrust surface 6 through The oil return pipeline 7 flows into the oil pool 2, and the lubricating oil flowing into the oil pool is effectively cooled by the cooler 8 shown in Figure 4. The cooling temperature is as low as 65°C to ensure that the thrust surface of the bearing is fully Lubricated and cooled to form a continuous oil film. Thereby overcoming the defect of using external power to supply oil (oil pump), improving the reliability of the bearing, and avoiding the loss of large equipment such as large ball mills, rotary kilns, ship propulsion motors and coolers due to bearing failures.

Claims (2)

1. A large-scale sliding bearing thrust surface reverse lubrication and lubricating oil cooling method, characterized in that the lubricating oil brought in by the left oil thrower impeller and oil scraper is provided to the right thrust surface through the left oil inlet pipe; on the contrary, The lubricating oil brought in by the impeller of the oil flinger on the right and the oil scraper is supplied to the thrust surface on the left through the right oil inlet pipe; The lubricating oil in the oil sump is cooled. 2. The method for reverse lubrication and lubricating oil cooling of the thrust surface of a large sliding bearing according to claim 1, characterized in that it comprises the following steps: (1) The mechanical oil supply device brings lubricating oil from the bearing oil pool to the top of the bearing bush; (2) The right hanging oil plate guides the lubricating oil into the right oil inlet pipe, and the left hanging oil plate guides the lubricating oil into the left oil inlet pipe; (3) Use gravity and centrifugal force to divide the lubricating oil in the oil inlet pipeline: one part is lubricated for the bearing bush, and the other part is lubricated for the reverse thrust surface; (4) The lubricating oil lubricates the bearing bush and the thrust surface and flows into the oil pool through the oil return pipeline; (5) The cooler cools the lubricating oil flowing into the oil pool to separate hot and cold oil; (6) The lubricating oil after cooling participates in the lubrication cycle again.

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