A large bearing lubricating grease filling and recycling system

Abstract

The utility model belongs to bearing lubricating technical field, specifically disclose a kind of large -scale bearing lubricating grease filling recycling system.The utility model discloses a kind of large -scale bearing lubricating grease filling recycling system, and realizes the intelligent filling of fine lubricating grease, and realizes the efficient recycling and recycling use to old lubricating grease.Controller accurate control filling pump's start-stop and running time, and the real-time monitoring of old grease discharge volume is combined with flow sensor, can dynamically adjust new grease filling quantity, to ensure that bearing cavity lubricating grease is always in optimum filling state.Active extraction of old lubricating grease discharged by bearing pedestal is carried out by recycling pump, and online quality detection is carried out by lubricating grease quality sensor in monitoring box.This greatly improves the utilization of lubricating grease, saves lubricating cost, also reduces the pollution of waste grease to on-site environment from source, meets the requirement of green environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of bearing lubrication technology, specifically to a large bearing lubricating grease filling and recovery system. Background Technology

[0002] While bearing lubrication technology has made significant progress, there are still notable shortcomings in the scientific application and efficient recycling of lubricating grease. This is especially true for large bearings (such as those used in hoists), where lubrication operations typically rely on the experience of on-site personnel, with grease added in fixed amounts at set times, lacking precise and reliable data support. This extensive management approach easily leads to two adverse consequences: insufficient grease application, causing bearing wear and even equipment damage; and excessive grease application, resulting in significant waste of lubricating grease. The handling of used lubricating grease is even more backward, with waste grease generally left to drip and be discarded, polluting the environment and wasting resources. Cleaning is only carried out manually when the bearing overheats due to lubrication problems and new grease cannot be injected; this method is time-consuming, labor-intensive, and disrupts continuous equipment operation.

[0003] Existing technologies lack a system capable of intelligently controlling the entire process of bearing lubrication, making it impossible to precisely add bearing lubricating grease, or to effectively recycle and reuse the discharged old lubricating grease after quality assessment. Utility Model Content

[0004] The purpose of this invention is to propose a large-scale bearing lubricating grease filling and recycling system to achieve precise filling of bearing lubricating grease and improve the recycling rate of old lubricating grease.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: A large bearing lubricating grease filling and recovery system includes: Refill box; A filling pump, the inlet of which is connected to the outlet of the filling tank via a pipeline; The bearing housing has its oil inlet connected to the oil outlet of the filling pump via a pipeline; The oil inlet of the recovery pump is connected to the oil outlet of the bearing housing via a pipeline; The monitoring box has its oil inlet connected to the oil outlet of the recovery pump via a pipeline; The grease quality sensor has its monitoring end located inside the monitoring box. The inlet of the electromagnetic reversing valve is connected to the outlet of the monitoring box via a pipeline, and the first outlet of the electromagnetic reversing valve is connected to the inlet of the filling tank via a pipeline. The waste oil tank is connected to the second oil outlet of the solenoid directional valve via a pipeline. The controller is connected via signal cables to the control terminals of the filling pump, the recovery pump, the grease quality sensor, and the solenoid directional valve.

[0006] Preferably, it also includes a flow sensor, which is connected to the pipeline between the recovery pump and the monitoring box; The controller is also connected to the flow sensor via a signal cable.

[0007] Preferably, the bearing housing includes a base, an outer end cover, and an inner end cover; An assembly cavity is formed in the base, a bearing is assembled in the assembly cavity, an outer end cap is assembled at the outer end of the assembly cavity, and an inner end cap is assembled at the inner end of the assembly cavity. The oil inlet of the bearing housing is connected to the assembly cavity in the space between the inner end cover and the bearing, and the oil outlet of the bearing housing is connected to the assembly cavity in the space between the outer end cover and the bearing.

[0008] Preferably, the assembly cavity is provided with an oil stirring fan blade in the space between the outer end cover and the bearing. The oil stirring fan blade is counterweighted by a rotary drive mechanism, which drives the oil stirring fan blade to rotate.

[0009] Preferably, the rotary drive mechanism is configured as a first motor, which is mounted on the outer end cover, and the output shaft of the first motor is connected to the oil stirring fan blades.

[0010] Preferably, the oil stirring fan blade is located at the oil outlet of the bearing housing.

[0011] Preferably, a heating plate is provided on the outer end cover, which is used to generate heat to heat the lubricating grease in the assembly cavity.

[0012] Preferably, a push plate is provided in the space between the inner end cover and the bearing in the assembly cavity. The push plate is slidably fitted in the assembly cavity so that the push plate can move along the axial direction of the bearing. The push plate is equipped with a push drive mechanism, which drives the push plate to move along the axial direction of the bearing.

[0013] Preferably, the pushing drive mechanism includes a threaded sleeve, a threaded post, and a second motor. The threaded sleeve is disposed on the outer end of the push plate, and the second motor is disposed on the inner end cover. The output shaft of the second motor is connected to the threaded post, and the threaded post is threadedly engaged with the threaded sleeve.

[0014] Preferably, the pusher plate is provided in several pieces, and each pusher plate is equipped with a pushing drive mechanism.

[0015] Compared with the prior art, the large bearing lubricating grease filling and recovery system of this utility model can achieve the following beneficial technical effects: This invention achieves precise and intelligent lubricant filling and efficient recycling of used lubricant. The controller precisely controls the start-up, shutdown, and running time of the filling pump, and combined with real-time monitoring of the used grease discharge by a flow sensor, dynamically adjusts the amount of new grease added, ensuring that the lubricant in the bearing cavity is always in optimal filling condition. This avoids the problems of "under-lubrication" or "over-lubrication" caused by traditional manual experience-based filling, significantly reducing the risk of bearing wear and equipment failure due to improper lubrication, and improving the reliability and service life of the equipment. The used lubricant discharged from the bearing housing is actively extracted by the recovery pump and its quality is monitored online by a grease quality sensor in the monitoring tank. When the used grease quality is not lower than a set threshold, it is controlled by an electromagnetic reversing valve to flow back to the filling tank, achieving recycling of the used grease; when the used grease quality is too low, it is automatically switched to the waste oil tank for collection. This greatly improves the utilization rate of lubricant, saves lubrication costs, and reduces the pollution of the on-site environment by waste grease from the source, meeting the requirements of green environmental protection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the large bearing lubricating grease filling and recovery system of this utility model; Figure 2 This is a cross-sectional view of the bearing housing of this utility model; Figure 3 for Figure 2 A magnified view of a section at point A in the middle; Figure 4 for Figure 2 A magnified view of a section at point B in the middle; Figure 5 This is a perspective view of the outer end cap of this utility model; Figure 6 This is a perspective view of the inner end cap of this utility model; Figure 7 This is a perspective view of the oil stirring fan blade of this utility model. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] like Figures 1 to 7 As shown, this utility model proposes a large bearing lubricating grease filling and recycling system, including a filling tank 11, a filling pump 12, a bearing housing 2, a recycling pump 3, a monitoring box 4, a lubricating grease quality sensor 5, an electromagnetic reversing valve 6, a waste oil tank 7, a controller 8, and a flow sensor 9.

[0020] The filling tank 11 contains lubricating grease, and the oil inlet of the filling pump 12 is connected to the oil outlet of the filling tank 11 via a pipeline.

[0021] The oil inlet of bearing housing 2 is connected to the oil outlet of injection pump 12 via a pipeline, and the oil inlet of recovery pump 3 is connected to the oil outlet of bearing housing 2 via a pipeline.

[0022] The monitoring box 4 contains lubricating grease. The oil inlet of the monitoring box 4 is connected to the oil outlet of the recovery pump 3 via a pipeline. The monitoring end of the lubricating grease quality sensor 5 is located inside the monitoring box 4.

[0023] The oil inlet of the electromagnetic reversing valve 6 is connected to the oil outlet of the monitoring box 4 via a pipeline. The first oil outlet of the electromagnetic reversing valve 6 is connected to the oil inlet of the filling tank 11 via a pipeline. The waste oil tank 7 is connected to the second oil outlet of the electromagnetic reversing valve 6 via a pipeline.

[0024] The flow sensor 9 is connected to the pipeline between the recovery pump 3 and the monitoring box 4.

[0025] The controller 8 is connected via signal cables to the control terminals of the filling pump 12, the recovery pump 3, the grease quality sensor 5, the solenoid reversing valve 6, and the flow sensor 9.

[0026] The bearing housing 2 includes a base 21, an outer end cover 22, and an inner end cover 23. An assembly cavity is formed within the base 21, where a bearing 20 is assembled. The outer end cover 22 is assembled at the outer end of the assembly cavity, and the inner end cover 23 is assembled at the inner end. The oil inlet of the bearing housing 2 communicates with the space between the inner end cover 23 and the bearing 20 within the assembly cavity. The oil outlet of the bearing housing 2 also communicates with the space between the outer end cover 22 and the bearing 20 within the assembly cavity. The oil inlet of the bearing housing 2 is connected to an oil inlet nozzle 241, which is connected via a pipeline to the oil outlet of a filling pump 12. The oil outlet of the bearing housing 2 is connected to an oil outlet nozzle 242, which is connected via a pipeline to the oil inlet of a recovery pump 3.

[0027] An oil agitator 251 is installed in the space between the outer end cover 22 and the bearing 20 within the assembly cavity. The oil agitator 251 is located at the oil outlet of the bearing housing 2. The oil agitator 251 is counterweighted by a rotary drive mechanism, which drives the oil agitator 251 to rotate. The rotation of the oil agitator 251 agitates the old lubricating grease in the assembly cavity and continuously pushes the old lubricating grease into the oil outlet 242, so that the old lubricating grease flows out of the assembly cavity.

[0028] The rotary drive mechanism is configured as a first motor 252, which is mounted on the outer end cover 22. The output shaft of the first motor 252 passes through the outer end cover 22 and is connected to the oil stirring blade 251. The output shaft of the first motor 252 rotates to drive the oil stirring blade 251 to rotate.

[0029] A heating plate 26 is provided on the outer end cover 22. The heating plate 26 is used to generate heat to heat the lubricating grease in the assembly cavity. In this way, the temperature of the old lubricating grease is increased, the fluidity of the old lubricating grease is increased, so that the old lubricating grease can flow out of the assembly cavity more easily.

[0030] The combined action of the oil stirring fan blade 251 and the heating plate 26 effectively overcomes the problem of strong adhesion and difficulty in removal of old grease in large bearings, ensuring that the old grease can be quickly and thoroughly removed, providing a clean cavity environment for subsequent new grease filling, and avoiding the decline in lubrication performance caused by old grease residue.

[0031] A push plate 27 is provided in the space between the inner end cover 23 and the bearing 20 in the assembly cavity. The push plate 27 slides within the assembly cavity, allowing it to move along the axis of the bearing 20. The push plate 27 is equipped with a pushing drive mechanism, which drives the push plate 27 to move along the axis of the bearing 20. As the push plate 27 moves toward the bearing 20, it smoothly and evenly squeezes new lubricating grease into the bearing 20, while simultaneously squeezing out the old lubricating grease from within the bearing 20.

[0032] A seal 271 is provided at the edge of the push plate 27 to improve the dynamic sealing performance when the push plate 27 pushes the lubricating grease.

[0033] The pushing drive mechanism includes a threaded sleeve 281, a threaded post 282, and a second motor 283. The threaded sleeve 281 is located at the outer end of the push plate 27, and the second motor 283 is located on the inner end cover 23. The output shaft of the second motor 283 passes through the inner end cover 23 and is connected to the threaded post 282, which is threadedly fitted into the threaded sleeve 281. The threaded sleeve 281 has a threaded hole, and the outer wall of the threaded post 282 has an external thread. The output shaft of the second motor 283 drives the threaded post 282 to rotate forward, with the threaded post 282 threadedly fitted into the threaded sleeve 281, and the push plate 27 slidingly fitted into the assembly cavity, thereby moving the threaded sleeve 281 and the push plate 27 toward the bearing 20. Similarly, the output shaft of the second motor 283 drives the threaded post 282 to rotate in the opposite direction, thereby moving the threaded sleeve 281 and the push plate 27 away from the bearing 20.

[0034] In this embodiment, three push plates 27 are provided, each push plate 27 has an arc-shaped structure, and each push plate 27 is equipped with a pushing drive mechanism. Adjacent push plates 27 are connected by a soft material to ensure that there is no leakage of lubricating grease between adjacent push plates 27.

[0035] The operation process of the large bearing lubricating grease filling and recovery system in this embodiment is as follows: The filling tank 11 contains lubricating grease. The filling pump 12 draws the lubricating grease from the filling tank 11 and pumps it into the assembly cavity of the bearing housing 2. The old lubricating grease in the assembly cavity of the bearing housing 2 flows to the recovery pump 3. The recovery pump 3 pumps the old lubricating grease to the flow sensor 9 and the monitoring tank 4. The flow sensor 9 monitors the flow rate of the old lubricating grease, and the lubricating grease quality sensor 5 monitors the quality of the old lubricating grease. The current lubrication status of the bearing 20 can be determined by the quality of the old lubricating grease. Based on the quality of the old lubricating grease, the controller 8 triggers the solenoid directional valve 6 to connect one of its inlets to the first outlet and the second outlet. When the lubricating grease quality sensor 5 detects that the quality of the old lubricating grease is not lower than a set threshold, the controller 8 triggers the solenoid directional valve 6 to connect its inlet to the first outlet, and the old lubricating grease flows back to the filling tank 11 through the first outlet for continued use. When the quality of the used lubricating grease detected by the grease quality sensor 5 is lower than a set threshold, the controller 8 triggers the connection between the inlet and the second outlet of the solenoid reversing valve 6, allowing the used lubricating grease to flow through the second outlet to the waste oil tank 7 for recycling. The controller 8 also controls the start-up, running time, and shutdown of the filling pump 12, and the start-up, running time, and shutdown of the recovery pump 3, thereby regulating the amount of lubricating grease added to and discharged from the bearing housing 2. Furthermore, the controller 8 regulates the amount of lubricating grease added to the bearing housing 2 based on the discharge rate of the used lubricating grease monitored by the flow sensor 9.

[0036] Of course, the above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model and should be protected by the present utility model.

Claims

1. A large bearing lubricating grease filling and recovery system characterized by, include: Refill box; A filling pump, the inlet of which is connected to the outlet of the filling tank via a pipeline; The bearing housing has its oil inlet connected to the oil outlet of the filling pump via a pipeline; The oil inlet of the recovery pump is connected to the oil outlet of the bearing housing via a pipeline; The monitoring box has its oil inlet connected to the oil outlet of the recovery pump via a pipeline; The grease quality sensor has its monitoring end located inside the monitoring box. The inlet of the electromagnetic reversing valve is connected to the outlet of the monitoring box via a pipeline, and the first outlet of the electromagnetic reversing valve is connected to the inlet of the filling tank via a pipeline. The waste oil tank is connected to the second oil outlet of the solenoid directional valve via a pipeline. The controller is connected via signal cables to the control terminals of the filling pump, the recovery pump, the grease quality sensor, and the solenoid directional valve.

2. The large bearing lubricating grease filling and recovery system according to claim 1, characterized in that, It also includes a flow sensor, which is connected to the pipeline between the recovery pump and the monitoring box; The controller is also connected to the flow sensor via a signal cable.

3. The large bearing lubricating grease filling and recovery system according to claim 1, characterized in that, The bearing housing includes a base, an outer end cover, and an inner end cover; An assembly cavity is formed in the base, a bearing is assembled in the assembly cavity, an outer end cap is assembled at the outer end of the assembly cavity, and an inner end cap is assembled at the inner end of the assembly cavity. The oil inlet of the bearing housing is connected to the assembly cavity in the space between the inner end cover and the bearing, and the oil outlet of the bearing housing is connected to the assembly cavity in the space between the outer end cover and the bearing.

4. The large bearing lubricating grease filling and recovery system according to claim 3, characterized in that, An oil stirring fan blade is installed in the space between the outer end cover and the bearing in the assembly cavity. The oil stirring fan blade is counterweighted by a rotary drive mechanism, which drives the oil stirring fan blade to rotate.

5. A large bearing lubricating grease filling and recovery system according to claim 4, characterized in that, The rotary drive mechanism is configured as a first motor, which is mounted on the outer end cover, and the output shaft of the first motor is connected to the oil stirring fan blade.

6. A large bearing lubricating grease filling and recovery system according to claim 4, characterized in that, The oil stirring fan blade is located at the oil outlet of the bearing housing.

7. A large bearing lubricating grease filling and recovery system according to claim 3, characterized in that, A heating plate is provided on the outer end cover, which is used to generate heat to heat the lubricating grease in the assembly cavity.

8. A large bearing lubricating grease filling and recovery system according to claim 3, characterized in that, A push plate is provided in the space between the inner end cover and the bearing in the assembly cavity. The push plate slides in the assembly cavity so that it can move along the axis of the bearing. The push plate is equipped with a push drive mechanism, which drives the push plate to move along the axis of the bearing.

9. A large bearing lubricating grease filling and recovery system according to claim 8, characterized in that, The pushing drive mechanism includes a threaded sleeve, a threaded column, and a second motor. The threaded sleeve is located at the outer end of the push plate, and the second motor is located on the inner end cover. The output shaft of the second motor is connected to the threaded column, and the threaded column is threadedly engaged with the threaded sleeve.

10. A large bearing lubricating grease filling and recovery system according to claim 8, characterized in that, The pusher plate is provided in several blocks, and each pusher plate is equipped with a pushing drive mechanism.

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