Double-bearing structure lubricated by double grease adding channels

Abstract

The utility model relates to a double-bearing structure adopting double grease adding channels for lubrication, which is provided with a newly added grease adding channel, and the newly added grease adding channel is specifically a channel which is communicated to a bearing outer cover from a grease injection port B, communicated to an outer ring of a second bearing from the bearing outer cover through an oil conveying pipe, and communicated to a waste oil box from the second bearing. The bearing grease adding device has the advantages that the newly-added grease adding channel and the original grease adding channel convey grease to the two bearings together, and renewal and replacement of the grease are achieved; after the grease channel is newly added, the original matching and structure of the bearings are not changed, so that the two bearings can be well lubricated, the lubrication requirements of the bearings are ensured, the distance from grease to the second bearing is shortened, and the problems that the original grease adding route is too long, the grease is difficult to reach the second bearing and the lubrication of the second bearing is poor are solved; and grease can enter the roller of the second bearing more easily, so that the second bearing can be well lubricated and protected, the cost is low, and the practical operability is very high.

Description

Technical Field

[0001] This utility model belongs to the field of lubrication technology for open-type doubly fed generators, and particularly relates to a double bearing structure with dual grease lubrication channels. Background Technology

[0002] Conventional open-type doubly-fed generators typically use grease lubrication; such as Figure 1 As shown, the grease injection circuit is as follows: bearing outer cover - bearing housing - bearing inner cover - first bearing - second bearing - waste oil box, thereby realizing the grease lubrication of the first bearing and the second bearing;

[0003] The original grease filling channel required the grease to pass through the first bearing before reaching the second bearing in the bearing housing cover. This resulted in a longer grease filling path for the second bearing. If the amount of grease added was insufficient, it would cause poor lubrication of the second bearing, leading to wear and damage. In addition, when the generator was rotating at high speed, it became more difficult for the grease to enter the bearing rollers, making it more prone to bearing lubrication problems. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a dual-bearing structure with dual grease lubrication channels.

[0005] This dual-bearing structure with dual grease lubrication channels includes: grease inlet A, bearing housing, bearing outer cover, oil slinger, second bearing, bearing inner cover, first bearing and cylindrical roller bearing, original grease channel hole, waste oil box and original grease channel; the original grease channel is specifically a channel that connects grease inlet A to bearing outer cover, from bearing outer cover to bearing housing, from bearing housing to first bearing, from first bearing to second bearing, and from second bearing to waste oil box, for grease filling the first bearing and second bearing;

[0006] A new grease channel is also provided. Specifically, the new grease channel connects from the grease inlet B to the bearing outer cover, from the bearing outer cover to the outer ring of the second bearing via an oil supply pipe, and then from the second bearing to the waste oil box. When the grease newly added through the new grease channel gradually accumulates to a certain amount on the outer ring of the second bearing, it diffuses to the rollers of the second bearing. As the shaft rotates, the grease is carried to each roller of the second bearing, so that the second bearing is fully lubricated.

[0007] As a preferred option, the oil supply pipe and the opening on the bearing outer cover are interference fit. The oil supply pipe is fixed in the opening on the bearing outer cover. After assembly, the oil supply pipe will not rotate in the hole of the outer cover. Even if the oil supply pipe rotates after assembly due to machining errors, it will not affect the flow of grease to the outer ring of the second bearing through the four small holes evenly distributed on the oil supply pipe.

[0008] The beneficial effects of this utility model are:

[0009] This invention adds a new grease filling channel to the existing grease filling channel. The new grease filling channel is mainly used for grease lubrication of the second bearing. Together with the existing grease filling channel, it delivers grease to both bearings. After the grease in the existing grease filling channel is full, it pushes all the waste grease in the second bearing to be gradually discharged, thereby realizing the replacement of grease.

[0010] The addition of a grease channel in this invention does not alter the original fit and structure of the bearings, ensuring good lubrication for both bearings and meeting their lubrication requirements. It shortens the distance the grease travels to the second bearing, solving the problem of the original grease path being too long and the grease having difficulty reaching the second bearing, leading to poor lubrication. This allows the grease to more easily enter the rollers of the second bearing, providing good lubrication and protection. It is low-cost and highly practical. Attached Figure Description

[0011] Figure 1 A schematic diagram of grease application for a conventional open-type generator with dual bearings;

[0012] Figure 2 A schematic diagram of a dual-bearing structure with dual grease-lubrication channels designed for this utility model.

[0013] Explanation of reference numerals in the attached diagram: Grease port A1, bearing housing 2, bearing outer cover 3, oil slinger 4, second bearing 5, bearing inner cover 6, first bearing 7, cylindrical roller bearing 8, existing grease filling channel 16, newly added grease filling channel 17, oil supply pipe 18, grease port B19, waste oil box 20. Detailed Implementation

[0014] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

[0015] As one example, such as Figure 1 and Figure 2 As shown, it includes: grease inlet A1, bearing housing 2, bearing outer cover 3, oil slinger 4, second bearing 5, bearing inner cover 6, first bearing 7 and cylindrical roller bearing 8, original grease filling channel hole 10, waste oil box and original grease filling channel 16; the original grease filling channel 16 is specifically a channel that connects grease inlet A1 to bearing outer cover 3, from bearing outer cover 3 to bearing housing 2, from bearing housing 2 to first bearing 7, from first bearing 7 to second bearing 5, and then from second bearing 5 to waste oil box 20;

[0016] A new grease channel 17 is also provided. Specifically, the new grease channel 17 is a channel that connects from the grease inlet B19 to the bearing outer cover 3, from the bearing outer cover 3 to the outer ring of the second bearing 5 via the oil supply pipe 18, and then from the second bearing 5 to the waste oil box 20. The oil supply pipe 18 and the opening on the bearing outer cover 3 are interference fit, and the oil supply pipe 18 is fixed in the opening on the bearing outer cover 3.

[0017] When injecting grease into grease port A1 and grease port B19, more grease should be injected into grease port A1 and less into grease port B19, but the total amount remains the same. That is, with a fixed amount of grease, the bearing can be better lubricated.

Claims

1. A dual-bearing structure employing dual grease-lubrication channels, comprising: The structure includes: grease inlet A (1), bearing housing (2), bearing outer cover (3), oil slinger (4), second bearing (5), bearing inner cover (6), first bearing (7), cylindrical roller bearing (8), existing grease channel hole (10), waste oil box, and existing grease channel (16); the existing grease channel (16) is specifically a channel that connects from grease inlet A (1) to bearing outer cover (3), from bearing outer cover (3) to bearing housing (2), from bearing housing (2) to first bearing (7), from first bearing (7) to second bearing (5), and from second bearing (5) to waste oil box (20); characterized in that: A new grease channel (17) is also provided. Specifically, the new grease channel (17) is a channel that connects from the grease port B (19) to the bearing cover (3), from the bearing cover (3) to the outer ring of the second bearing (5) via the oil supply pipe (18), and then from the second bearing (5) to the waste oil box (20).

2. The dual-bearing structure with dual grease-lubrication channels as described in claim 1, characterized in that: The oil pipe (18) and the opening on the bearing outer cover (3) are interference fit, and the oil pipe (18) is fixed in the opening on the bearing outer cover (3).

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