Main drive sealing protection device with lubricating grease recovery function

Abstract

The utility model discloses a main drive sealing protection device with a lubricating grease recovery function. The problems that in the prior art, lubricating grease of a main drive center is prone to being wasted, and a pressure-resistant sealing piece is fast to abrade and not easy to replace are solved. The utility model discloses a main drive sealing protection device with a lubricating grease recovery function. The main drive sealing protection device comprises an outer sealing structure and a grease recovery structure which are arranged at a main drive sealing structure, the grease recovery structure comprises a recovery ring piece, and a grease recovery channel is arranged in the recovery ring piece; the outer sealing structure comprises an outer side sealing piece and a limiting installation piece for fixing the outer side sealing piece, an outer sealing channel is formed between the limiting installation piece and the recycling ring piece, the inner side of the outer sealing channel communicates with the inner sealing channel of the main drive sealing structure, and the outer side of the outer sealing channel is sealed through the outer side sealing piece. The inner sealing channel is sealed through an inner sealing assembly, and a cavity channel between the outer sealing piece and the inner sealing assembly forms an outer sealing cavity. And the grease recovery channel is communicated with the outer side sealing cavity. A group of seals convenient to replace is additionally arranged on the outer side of an existing main drive to form an outer sealing structure, and the outer sealing structure plays a role in sealing and protecting the existing main drive seal; meanwhile, the outer sealing piece of the outer sealing structure is convenient to disassemble and assemble, and rapid replacement is achieved. In addition, grease extruded by the main drive originally is recycled through the grease recycling structure, waste is reduced, and construction cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of main drive sealing and protection of roadheaders, in particular to a main drive sealing and protection device with a lubricating grease recovery function. Background Art

[0002] Multiple pressure-resistant seals are often used for sealing at the main drive parts of shield machines and TBMs. To ensure the sealing effect, lubricating grease needs to be extruded outwards at the sealing parts to prevent external impurities from entering the main drive interior. Since the lubricating grease needs to be continuously extruded and the extruded lubricating grease cannot be recycled, with the increase of the tunneling mileage, a large amount of waste is caused. At the same time, since the outermost seal directly contacts the external environment, external impurities are likely to contaminate the sealing track, resulting in relatively fast wear of the seals and inconvenient replacement of the seals.

[0003] In the prior art, such as a shaft tunneling machine and its main drive bearing lubricating device with the publication number of CN 110594566 A, an oil tank and an oil supply oil path and an oil return oil path respectively used for connecting between the oil tank and the main drive bearing are adopted. The lubricating oil in the oil tank flows into the main drive bearing through the oil supply oil path and then flows back to the oil tank from the main drive bearing through the oil return oil path, so as to lubricate the main drive bearing. Although this device can recycle the lubricating oil, the connection structure with the main drive seal is not disclosed, and the outer seal and the quick replacement of the seal cannot be achieved either. Summary of the Utility Model

[0004] Aiming at the deficiencies in the above background art, the utility model provides a main drive sealing and protection device with a lubricating grease recovery function, which solves the problems of easy waste of the central lubricating grease in the main drive and relatively fast wear and inconvenient replacement of the pressure-resistant seals in the prior art.

[0005] The technical solution of the utility model is realized as follows: A main drive sealing and protection device with a lubricating grease recovery function includes an outer sealing structure and a grease recovery structure arranged at the main drive sealing structure; the grease recovery structure includes a recovery ring member, and a grease recovery channel is arranged inside the recovery ring member; the outer sealing structure includes an outer seal and a limit mounting member for fixing the outer seal. An outer sealing channel is formed between the limit mounting member and the recovery ring member. The inner side of the outer sealing channel is communicated with the inner sealing channel of the main drive sealing structure. The outer side of the outer sealing channel is sealed by the outer seal. The inner sealing channel is sealed by an inner sealing component. The cavity between the outer seal and the inner sealing component forms an outer sealing cavity; the grease recovery channel is communicated with the outer sealing cavity.

[0006] Further preferably, the main drive sealing structure includes an outer ring member and a runway member. An inner sealing assembly is provided in the inner sealing channel formed between the outer ring member and the runway member. The inner sealing assembly is limited and fixed in the inner sealing channel by a pressure ring. A grease channel is provided in the runway member, and the oil outlet of the grease channel is located at the outer sealing cavity for grease recovery.

[0007] Further preferably, the inner sealing assembly includes an inner seal member and a spacer ring arranged crosswise. Inner sealing cavities are formed between two adjacent inner seal members and the spacer ring. The oil inlet of the grease channel is communicated with the inner sealing cavity. The lubricating grease extruded by the main drive enters the grease channel through this oil inlet, and enters the outer sealing cavity through the oil outlet of the grease channel, and then enters the grease recovery channel for grease recovery.

[0008] Further preferably, the limit mounting member includes a sealing mounting plate and a sealing pressing plate. The sealing mounting plate is detachably connected to the pressure ring, and the sealing pressing plate is detachably connected to the sealing mounting plate to achieve quick disassembly and assembly of the outer seal member.

[0009] Further preferably, a sealing limit groove is provided on the sealing mounting plate. The outer seal member is located in the sealing limit groove and is fixed by the sealing pressing plate. The outer seal member and the inner sealing assembly.

[0010] Further preferably, sealing members are provided between the sealing mounting plate and the pressure ring and between the sealing mounting plate and the sealing pressing plate. The sealing members here can be rubber seals to improve the overall sealing performance.

[0011] Further preferably, one end of the grease recovery channel is communicated with the outer sealing cavity, and the other end is connected to a grease storage container through a recovery pipeline.

[0012] As a preferred solution, a pressure detection device is connected to the recovery pipeline or the grease recovery channel.

[0013] As a preferred solution, a flow sensor is connected to the recovery pipeline or the grease recovery channel.

[0014] Further preferably, the grease recovery channel is connected to the recovery pipeline through a connector, and the grease storage container is connected to the grease injection system.

[0015] The beneficial effects of the present utility model are as follows: The present utility model adds a set of easily replaceable seals on the outside of the existing main drive to form an outer sealing structure, and the outer sealing structure plays a role in sealing and protecting the existing main drive seal. At the same time, the outer seal member of the outer sealing structure is convenient to disassemble and assemble, realizing quick replacement. In addition, the present utility model recovers the grease originally extruded by the main drive through the grease recovery structure, reducing waste and saving construction costs. Moreover, the grease recovery structure cooperates with the outer sealing structure, which can play a role in warning the wear of the seal, further improving the working safety of the main drive, and has high practicability. Description of the Drawings

[0016] In order to more clearly illustrate the embodiments of the present utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0017] Figure 1 It is a schematic layout diagram of the present utility model on the main drive structure.

[0018] Figure 2 is Figure 1 a partial enlarged view at position A in

[0019] In the figure, there are a sealing mounting plate 1, an outer sealing cavity 2, an outer seal 3, a sealing pressure plate 4, an outer sealing channel 5, a grease recovery channel 6, a pressure detection device 7, a grease storage container 8, an oil outlet 9, a recovery ring part 10, an inner sealing channel 11, a runway part 12, an outer ring part 13, an inner sealing assembly 14, a pressing ring 15, and a grease channel 16. Detailed Embodiments

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present utility model.

[0021] As Figure 1 、 2 shown in Embodiment 1, a main drive seal protection device with a lubricating grease recovery function includes an outer seal structure and a grease recovery structure provided at the main drive seal structure; the outer seal structure adds an additional seal structure outside the existing main drive seal, improving the sealing performance while facilitating disassembly, installation, and replacement. The grease recovery structure is used to recover the lubricating grease extruded by the main drive. It should be noted that the lubricating medium can be lubricating oil in addition to lubricating grease.

[0022] Specifically, the grease recovery structure includes a recovery ring member 10, and a grease recovery channel 6 is provided inside the recovery ring member 10; the outer sealing structure includes an outer seal member 3 and a limit mounting member for fixing the outer seal member 3; the limit mounting member is connected to the main drive sealing structure to fix the outer seal member. An outer sealing channel 5 is formed between the limit mounting member and the recovery ring member 10. The inner side of the outer sealing channel 5 communicates with the inner sealing channel 11 of the main drive sealing structure. The outer side of the outer sealing channel 5 is sealed by the outer seal member 3, the inner sealing channel 11 is sealed by the inner seal assembly 14, and the cavity between the outer seal member 3 and the inner seal assembly 14 forms an outer sealing cavity 2; the grease recovery channel 6 communicates with the outer sealing cavity 2. The grease extruded from the main drive enters the outer sealing cavity, and then is recovered through the grease recovery channel 6.

[0023] In this embodiment, the main drive sealing structure includes an outer ring member 13 and a runway member 12. An inner seal assembly 14 is provided in the inner sealing channel 11 formed between the outer ring member 13 and the runway member 12; the inner seal assembly 14 is used to seal the inner sealing channel 11 internally and seal the outer sealing channel 5 externally to form a sealed outer sealing cavity 2. The inner seal assembly 14 is limited and fixed in the inner sealing channel 11 by a pressure ring 15 to ensure the stability of the inner seal assembly 14. A grease channel 16 is provided inside the runway member 12, and the oil outlet 9 of the grease channel 16 is located at the outer sealing cavity 2. Preferably, the inner seal assembly 14 includes an inner seal member and a spacer ring arranged crosswise. Adjacent two inner seal members and the spacer ring form an inner sealing cavity with the inner sealing channel, and the oil inlet of the grease channel 16 communicates with the inner sealing cavity. One side of the outer sealing cavity is sealed by a seal member, and the other side has a grease recovery channel. The lubricating grease extruded from the main drive enters the grease channel, then enters the outer sealing cavity 2 through the oil outlet 9, and is collected into a grease storage container along the grease recovery channel 6 or directly connected to a grease injection system to complete the recovery of the grease and reduce waste.

[0024] As Figure 2 shown, in Embodiment 2, a main drive seal protection device with a lubricating grease recovery function is further optimized on the basis of Embodiment 1. In this embodiment, the limit mounting member includes a seal mounting plate 1 and a seal pressing plate 4. The seal mounting plate 1 is detachably connected to the pressure ring 15, and preferably, bolts are used to connect the seal mounting plate 1 and the pressure ring 15; the seal pressing plate 4 is detachably connected to the seal mounting plate 1, and preferably, bolts are used to connect the seal pressing plate 4 and the seal mounting plate 1; the above detachable connection method realizes the quick disassembly and assembly of the outer seal member, which is convenient for replacement. Preferably, a seal limit groove is provided on the seal mounting plate 1, and the outer seal member 3 is located in the seal limit groove and is pressed and fixed by the seal pressing plate 4 to ensure the sealing of the outer seal member 3 to the outer sealing channel 5. Seals are provided between the seal mounting plate 1 and the pressure ring 15 and between the seal mounting plate 1 and the seal pressing plate 4 to improve the overall sealing performance.

[0025] In this embodiment, one end of the grease recovery channel 6 is communicated with the outer sealing cavity 2 for recovering the grease in the outer sealing cavity 2. The other end of the grease recovery channel 6 is connected to the grease storage container 8 through the recovery pipeline 16. The grease recovery channel 6 is connected to the recovery pipeline 16 through a connector. The recovered grease is stored in the grease storage container 8 and can be reused after being filtered and purified. Or the grease storage container 8 can be connected to the grease injection system. The filtered and purified grease enters the grease injection system and is reinjected into the main drive for lubrication use.

[0026] In this embodiment, a pressure detection device 7 is connected to the recovery pipeline 16 or the grease recovery channel 6. The pressure detection device 7 is connected to the background controller, and a corresponding electromagnetic switch valve is provided on the recovery pipeline 16 or the grease recovery channel 6. Under normal circumstances, the grease is continuously extruded. One side of the outer sealing cavity is sealed by a seal, and a suitable opening pressure is set for the grease storage container on the other side. When the pressure in the outer sealing cavity reaches the opening pressure of the grease storage container, the grease enters the storage container for recovery. If the pressure in the outer sealing cavity is continuously less than the opening pressure set by the storage container, it indicates that the seal in the outer sealing cavity has been worn, and the seal position should be checked in time. It should be noted that the outer seal has a certain pressure resistance capacity, which is greater than the opening pressure set by the grease storage container.

[0027] The actual working process is as follows: Before the whole machine works, set the opening pressure of the outer sealing grease storage container. When the whole machine works, the main drive sealing part continuously injects grease outward, and the grease continuously accumulates in the outer sealing cavity. After the pressure reaches the opening pressure of the storage container, the grease is recovered by the storage device. If the pressure in the sealing cavity is continuously less than the set opening pressure of the storage container, an alarm is sent to the host computer. At this time, it indicates that the outer seal has been worn and the grease leaks outward, and the seal should be replaced in time.

[0028] Embodiment 3, a main drive sealing and protection device with a lubricating grease recovery function. The difference between this embodiment and Embodiment 1 is that in this embodiment, a flow sensor is connected to the recovery pipeline 16 or the grease recovery channel 6. In this embodiment, the flow sensor is used to replace the pressure detection device in Embodiment 2. By comparing the flow or weight of the lubricating grease / oil flowing into the storage container with the flow or weight of the injected lubricating grease / oil, if the flow or weight flowing into the storage container is significantly less, it is judged that the outer seal leaks.

[0029] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A main drive sealing and protection device with a lubricating grease recovery function, characterized in that: It includes an outer seal structure and a grease recovery structure provided at the main drive seal structure; the grease recovery structure includes a recovery ring member (10), and a grease recovery channel (6) is provided inside the recovery ring member (10); the outer seal structure includes an outer seal member (3) and a limit mounting member for fixing the outer seal member (3), and an outer seal channel (5) is formed between the limit mounting member and the recovery ring member (10). The inner side of the outer seal channel (5) communicates with the inner seal channel (11) of the main drive seal structure. The outer side of the outer seal channel (5) is sealed by the outer seal member (3), the inner seal channel (11) is sealed by an inner seal assembly (14), and a cavity between the outer seal member (3) and the inner seal assembly (14) forms an outer seal cavity (2); the grease recovery channel (6) communicates with the outer seal cavity (2).

2. The main drive seal protection device with a lubricating grease recovery function according to claim 1, characterized in that: The main drive seal structure includes an outer ring member (13) and a runway member (12). An inner seal assembly (14) is provided in the inner seal channel (11) formed between the outer ring member (13) and the runway member (12). The inner seal assembly (14) is limited and fixed in the inner seal channel (11) by a retaining ring (15). A grease channel (16) is provided in the runway member (12), and the oil outlet (9) of the grease channel (16) is located at the outer seal cavity (2).

3. The main drive seal protection device with a lubricating grease recovery function according to claim 2, characterized in that: The inner seal assembly (14) includes an inner seal member and a spacer ring arranged crosswise. An inner seal cavity is formed between two adjacent inner seal members and the spacer ring. The oil inlet of the grease channel (16) communicates with the inner seal cavity.

4. The main drive seal protection device with a lubricating grease recovery function according to claim 2, characterized in that: The limit mounting member includes a seal mounting plate (1) and a seal pressing plate (4). The seal mounting plate (1) is detachably connected to the retaining ring (15), and the seal pressing plate (4) is detachably connected to the seal mounting plate (1).

5. The main drive seal protection device with a lubricating grease recovery function according to claim 4, characterized in that: Seal limit grooves are provided on the seal mounting plate (1). The outer seal member (3) is located in the seal limit grooves and is pressed and fixed by the seal pressing plate (4).

6. The main drive seal protection device with a lubricating grease recovery function according to claim 4 or 5, characterized in that: Seal members are provided between the seal mounting plate (1) and the retaining ring (15) and between the seal mounting plate (1) and the seal pressing plate (4).

7. The main drive seal protection device with a lubricating grease recovery function according to claim 1, characterized in that: One end of the grease recovery channel (6) communicates with the outer seal cavity (2), and the other end is connected to a grease storage container (8) through a recovery pipeline (16).

8. The main drive seal protection device with a lubricating grease recovery function according to claim 7, characterized in that: A pressure detection device (7) is connected to the recovery pipeline (16) or the grease recovery channel (6).

9. The main drive seal protection device with a lubricating grease recovery function according to claim 7, characterized in that: A flow sensor is connected to the recovery pipeline (16) or the grease recovery channel (6).

10. The main drive seal protection device with a lubricating grease recovery function according to claim 8 or 9, characterized in that: The grease recovery channel (6) is connected to the recovery pipeline (16) through a connector, and the grease storage container (8) is connected to a grease injection system.

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