Slewing bearing lubricating grease filling device, method and excavator

Abstract

The application discloses a slewing bearing lubricating grease filling device and method and a excavator, which comprises N pressure sensors, a lubricating block, M lubricating pipes, a pump and a controller; each pressure sensor is communicated with a raceway on a slewing bearing, at least one pressure sensor is arranged between adjacent filling openings on the slewing bearing, and each filling opening is communicated with the raceway; one end of the lubricating block is connected with the pump, the other end of the lubricating block is connected with one end of each lubricating pipe, the other end of each lubricating pipe is communicated with a corresponding filling hole on a slewing platform, and each filling hole on the slewing platform is communicated with a corresponding filling opening on the slewing bearing; the input end of the controller is connected with the output end of each pressure sensor, the output end of the controller is connected with the pump, and the running state of the pump is controlled based on pressure signals output by the pressure sensors and a preset lubricating grease filling strategy. The application can ensure that the slewing bearing is filled with appropriate amount of lubricating grease, and waste caused by excessive overflow or abnormal wear of the slewing bearing caused by insufficient filling can be avoided.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a slewing bearing grease filling device and method and excavator. BACKGROUND

[0002] The slewing bearing needs to be continuously filled with grease to ensure that the balls are sufficiently lubricated in the raceway. To ensure that the raceway is evenly filled with grease when filling the grease, large excavator slewing bearings generally use a circumferential three-point type to arrange the filling port. In the prior art, an electric automatic lubrication filling method is usually used to fill a fixed amount of grease every 200 hours of work time to ensure that the slewing bearing is sufficiently lubricated and reduce the wear of the balls and the raceway.

[0003] Since the existing slewing bearing ball automatic grease filling often uses a fixed-time and fixed-quantity method, the filling amount cannot be adjusted according to the actual consumption. If the filling amount is too much, the grease will overflow through the sealing ring of the slewing bearing, causing waste. If the filling amount is too little, the raceway will not be sufficiently lubricated, which will accelerate and shorten the service life of the slewing bearing. SUMMARY

[0004] To solve the above problems, the present application provides a slewing bearing grease filling device, method and excavator, which can ensure that the slewing bearing is filled with an appropriate amount of grease and will not cause waste due to excessive overflow or abnormal wear of the slewing bearing due to insufficient filling.

[0005] To achieve the above technical purposes and effects, the present application realizes the following technical solutions:

[0006] In a first aspect, the present application provides a slewing bearing grease filling device, comprising: N pressure sensors, a lubricating block, M lubricating pipes, a pump and a controller.

[0007] Each pressure sensor is in communication with the raceway on the slewing bearing. At least one pressure sensor is arranged between adjacent filling ports on the slewing bearing. Each filling port is in communication with the raceway on the slewing bearing.

[0008] One end of the lubricating block is connected to the pump, and the other end is connected to one end of each lubricating pipe. The other end of each lubricating pipe is in communication with the corresponding filling hole on the slewing platform. Each filling hole on the slewing platform is in communication with the corresponding filling port on the slewing bearing.

[0009] The input end of the controller is connected to the output end of each pressure sensor, and the output end is connected to the pump. Based on the pressure signals output by each pressure sensor and the preset grease filling strategy, the operating state of the pump is controlled.

[0010] Optionally, the rotary bearing grease filling device further comprises a distributor connected with the lubricating blocks and the pump respectively and connected with the controller, and the controller controls the operating state of the pump and the distributor based on the pressure signals output by the pressure sensors and the preset grease filling strategy.

[0011] Optionally, the preset grease filling strategy comprises:

[0012] The controller sends a filling instruction and a filling time t0 to the distributor and the pump;

[0013] If at least one of the pressure signals output by the N pressure sensors reaches the set pressure value p0 within the filling time t0, the controller controls the distributor and the pump to continue filling for a time t1, t1 < t0, and if the pressure values output by the N pressure sensors all reach the set value p0 within the filling time t1, it indicates that the current grease filling is completed.

[0014] If the pressure values output by the N pressure sensors all do not reach the set value p0 within the filling time t0 or the filling time t1, the controller controls the distributor and the pump to stop filling, and the rotary platform is rotated by 180°, the controller controls the distributor and the pump to continue filling for a time t2, t2 < t0, and if the pressure values output by the N pressure sensors all reach the set value p0 within the filling time t2, it indicates that the current grease filling is completed, and the controller controls the distributor and the pump to stop filling; if the pressure values output by the N pressure sensors do not all reach the set value p0 within the filling time t2, it is determined whether the raceway of the rotary bearing is blocked.

[0015] Optionally, the lubricating blocks are provided with grease filling ports connected with the distributor.

[0016] Optionally, the pressure sensors are arranged at equal intervals in the circumferential direction.

[0017] Optionally, the lubricating pipes are respectively connected with the corresponding filling holes on the rotary platform through elbows.

[0018] Optionally, the lubricating pipes are respectively connected with the lubricating blocks through lubricating joints.

[0019] Optionally, the number of the pressure sensors and the lubricating pipes is 3.

[0020] In a second aspect, the application provides a filling method of the rotary bearing grease filling device according to any one of the first aspect, comprising:

[0021] The pressure sensors output pressure signals to the controller;

[0022] The controller controls the operation state of the pump based on the pressure signals output by the pressure sensors and a preset grease filling strategy.

[0023] In a third aspect, the application provides a excavator comprising the grease filling device for slewing bearing according to any one of the first aspect.

[0024] Compared with the prior art, the application has the following beneficial effects:

[0025] The application realizes the filling of grease into the raceway through the filling port, ensures the filling amount of grease, avoids excessive filling of grease or insufficient filling of grease, causes excessive wear of the slewing bearing, and can detect whether the raceway is unobstructed to ensure normal lubrication of the slewing bearing. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed in the embodiments. Obviously, the drawings in the following description are only some embodiments of the application, and for those skilled in the art, other drawings can be obtained based on these drawings without creative labor, and the drawings include:

[0027] Figure 1 It is a top view of the grease filling device for slewing bearing according to an embodiment of the application;

[0028] Figure 2 It is a front view of the grease filling device for slewing bearing according to an embodiment of the application;

[0029] Figure 3 It is a control principle block diagram of the grease filling device for slewing bearing according to an embodiment of the application;

[0030] Figure 4 It is a grease filling strategy schematic diagram of the grease filling device for slewing bearing according to an embodiment of the application;

[0031] Among them:

[0032] 1-rotating platform, 2-1 elbow, 2-2 lubricating pipe one, 2-3 lubricating joint, 2-4 lubricating block, 2-5 grease filling port, 2-6 lubricating pipe two, 2-7 lubricating pipe three, 2-8 pressure sensor, 3-1 slewing bearing outer ring, 3-2 slewing bearing inner ring, 3-3 raceway channel, 3-4 ball, 4-controller, 5-distributor. DETAILED DESCRIPTION

[0033] Clearly, the embodiments described are only some embodiments of the application and not all embodiments of the application. Descriptions of the example embodiments are intended to be illustrative, and not to be limiting. Many variations to the example embodiments will be readily apparent to those skilled in the art from the embodiments described herein, and the entirety of the application scope is intended to encompass all such variations.

[0034] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the application unless otherwise specifically stated. It is to be understood that the drawings are not necessarily to scale as the dimensions of the parts shown are for the purpose of providing an illustration of the application only and can not reflect the actual proportions of the parts. Techniques, methods, and apparatus known to those of ordinary skill can not be discussed in detail herein. However, the present disclosure should be understood to include any such techniques, methods, and apparatus within the scope of the application. In all examples shown and discussed herein, any specific values should be interpreted as merely illustrative and not as a limitation of the application. Thus, other example embodiments of the application can include different values. It is noted that like numbers and letters on the figures identify like parts throughout the several views, and thus, further discussion of the same will not be repeated.

[0035] In the description of the application, the meaning of several, more than one, multiple, two or more, greater than, less than, exceeds, etc. is understood as not including the number itself, and above, below, within, etc. is understood as including the number itself. If it is described as first, second, etc., it is only for the purpose of distinguishing the technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the sequence of indicated technical features.

[0036] In the description of the application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the application. In the present specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0037] The application principle of the application will be described in detail below in combination with the drawings.

[0038] Example 1

[0039] The application provides a rotary support lubricating grease filling device, which comprises N pressure sensors 2-8, a lubricating block 2-4, M lubricating pipes, a pump (not shown in the figure) and a controller 4. Figures 1-2

[0040] Each pressure sensor 2-8 is connected with a raceway on the rotary support, at least one pressure sensor 2-8 is arranged between adjacent filling ports on the rotary support, each filling port is connected with a raceway on the rotary support, so that the lubricating grease can be detected in the raceway during detection, and the situation that the pressure value is qualified but the raceway is blocked or there is no lubricating grease in part of the raceway does not exist. In the specific implementation process, the rotary support is connected with a rotary platform 1 through bolts, a pressure sensor mounting hole is reserved on the rotary platform 1, the pressure sensor mounting hole is connected with the raceway on the rotary support through a raceway channel 3-3, the raceway is formed between an outer ring 3-1 of the rotary support and an inner ring 3-2 of the rotary support, and a ball 3-4 is arranged in the raceway. When the lubricating grease is filled through the pump, the pressure in the raceway is increased, and the three pressure sensors 2-8 transmit the detected pressure signals to the controller 4.

[0041] One end of the lubricating block 2-4 is connected with the pump, the other end is connected with one end of each lubricating pipe, the other end of each lubricating pipe is connected with a filling hole on the rotary platform 1, and each filling hole on the rotary platform 1 is connected with a corresponding filling port on the rotary support.

[0042] The input end of the controller 4 is connected with the output end of each pressure sensor 2-8, the output end is connected with the pump, the running state of the pump is controlled based on the pressure signals output by each pressure sensor 2-8 and the preset lubricating grease filling strategy.

[0043] Based on the rotary support lubricating grease filling device in the application, the pressure sensors 2-8 are arranged at the filling ports of the raceway, and the running state of the pump is controlled based on the pressure signals output by each pressure sensor 2-8 and the preset lubricating grease filling strategy by the controller 4, so that the lubricating grease can be filled into the raceway through the filling ports, the lubricating grease filling amount can be ensured, excessive filling of the lubricating grease or insufficient filling of the lubricating grease can be avoided, excessive wear of the rotary support can be avoided, and whether the raceway is unobstructed can be detected, so that the rotary support can be normally lubricated.

[0044] ​In one specific embodiment of the present application, the number of lubricating pipes is set to three, and the three lubricating pipes are respectively referred to as lubricating pipe one 2-2, lubricating pipe two 2-6, and lubricating pipe three 2-7. One end of the lubricating block 2-4 is connected to the pump, and the other end is connected to one end of the lubricating pipe one 2-2, the lubricating pipe two 2-6, and the lubricating pipe three 2-7, respectively. The other end of the lubricating pipe one 2-2, the lubricating pipe two 2-6, and the lubricating pipe three 2-7 is connected to the filling hole on the rotary platform 1, and each filling hole on the rotary platform 1 is connected to the corresponding filling port on the rotary support. In other specific embodiments of the present application, the number of pressure sensors 2-8 and lubricating pipes can also be set to other values, which can be set according to actual needs.

[0045] In one specific embodiment of the present application, as shown in FIG. 2, in order to facilitate accurate control, the rotary support lubricating grease filling device further comprises a distributor 5, which is connected to the lubricating block 2-4 and the pump, and is connected to the controller 4. The controller 4 controls the operating state of the pump and the distributor 5 based on the pressure signals output by the pressure sensors 2-8 and the preset lubricating grease filling strategy, thereby realizing control of the filling amount. Figure 3

[0046] In one specific embodiment of the present application, the preset lubricating grease filling strategy comprises:

[0047] The controller 4 sends a filling instruction and a filling time t0 to the distributor 5 and the pump;

[0048] If at least one of the pressure signals output by the N pressure sensors 2-8 reaches the set pressure value p0 within the filling time t0, the controller 4 controls the distributor 5 and the pump to continue filling for a time t1, t1 < t0. If the pressure values output by the N pressure sensors 2-8 all reach the set value p0 within the filling time t1, it indicates that the current lubricating grease filling is completed.

[0049] If the pressure values output by the N pressure sensors 2-8 all do not reach the set value p0 within the filling time t0 or the filling time t1, the controller 4 controls the distributor 5 and the pump to stop filling, and the upper vehicle is rotated by 180°. The controller 4 controls the distributor 5 and the pump to continue filling for a time t2, t2 < t0. If the pressure values output by the N pressure sensors 2-8 all reach the set value p0 within the filling time t2, it indicates that the current lubricating grease filling is completed, and the controller 4 controls the distributor 5 and the pump to stop filling. If the pressure values output by the N pressure sensors 2-8 do not all reach the set value p0 within the filling time t2, it is determined whether the raceway on the rotary support is blocked.

[0050] ​In an embodiment of the present application, the number of pressure sensors 2-8 and lubricating pipes is 3. In other embodiments of the present application, the number of pressure sensors 2-8 can also be set to other values, which can be set according to actual needs. Figure 4 As shown in FIG. 2, when the number of pressure sensors 2-8 is 3, the preset grease filling strategy includes:

[0051] The controller 4 sends a filling instruction and a filling time t0 to the distributor 5 and the pump.

[0052] If at least one of the pressure signals (p1, p2, p3) output by the three pressure sensors 2-8 reaches the set pressure value p0 within the filling time t0, the controller 4 controls the distributor 5 and the pump to continue filling for a time t1, t1 < t0. Within the filling time t1, if the pressure values (p1, p2, p3) output by the three pressure sensors 2-8 all reach the set value p0, it indicates that the current grease filling is completed.

[0053] If the pressure values (p1, p2, p3) output by the three pressure sensors 2-8 all do not reach the set value p0 within the filling time t0 or the filling time t1, the controller 4 controls the distributor 5 and the pump to stop filling, and rotates the upper car 180°. The controller 4 controls the distributor 5 and the pump to continue filling for a time t2, t2 < t0. If the pressure values (p1, p2, p3) output by the three pressure sensors 2-8 all reach the set value p0 within the filling time t2, it indicates that the current grease filling is completed, and the controller 4 controls the distributor 5 and the pump to stop filling. If the pressure values (p1, p2, p3) output by the three pressure sensors 2-8 do not all reach the set value p0 within the filling time t2, it is checked whether the raceway on the slewing bearing is blocked.

[0054] In an embodiment of the present application, as shown in FIG. 3, the lubricating block 2-4 is provided with a grease filling port 2-5, and the grease filling port 2-5 is connected to the distributor 5. Figure 1

[0055] In an embodiment of the present application, as shown in FIG. 4, in order to realize uniform monitoring, the pressure sensors 2-8 are arranged at equal intervals in the circumferential direction. Figure 1

[0056] In an embodiment of the present application, in order to facilitate fixation, the lubricating pipes are respectively connected to the corresponding filling holes on the rotating platform 1 through elbows 2-1. In the specific implementation process, the elbow 2-1 can be a right-angle elbow 2-1. As shown in FIG. 5, the lubricating pipes are respectively connected to the corresponding filling holes on the rotating platform 1 through elbows 2-1. Figure 1 ​​As shown, when the number of lubricating pipes is 3, the first lubricating pipe 2-2, the second lubricating pipe 2-6 and the third lubricating pipe 2-7 are connected to the corresponding filling holes on the slewing platform 1 through the elbow 2-1.

[0057] In one specific embodiment of the embodiment of the present application, in order to facilitate assembly, each lubricating pipe is connected to the lubricating block 2-4 through a lubricating joint 2-3. Figure 1 As shown, when the number of lubricating pipes is 3, the first lubricating pipe 2-2, the second lubricating pipe 2-6 and the third lubricating pipe 2-7 are connected to the lubricating block 2-4 through the lubricating joint 2-3 respectively.

[0058] Embodiment 2

[0059] In the embodiment of the present application, a filling method based on the slewing bearing grease filling device described in any one of the embodiments 1 is provided, comprising:

[0060] The pressure signals output by each pressure sensor 2-8 are transmitted to the controller 4.

[0061] The controller 4 controls the operating state of the pump based on the pressure signals output by each pressure sensor 2-8 and the preset grease filling strategy.

[0062] Embodiment 3

[0063] In the embodiment of the present application, a excavator is provided, comprising the slewing bearing grease filling device described in any one of the embodiments 1.

[0064] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the protection scope of the present application.

[0065] The basic principles and main features of the present application and the advantages of the present application have been shown and described. It should be understood by those skilled in the art that the present application is not limited by the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A grease filling device for a slewing bearing, characterized in that, include: N pressure sensors, lubrication blocks, M lubrication pipes, pumps, and controllers; Each pressure sensor is connected to the raceway on the slewing bearing. At least one pressure sensor is installed between adjacent filling ports on the slewing bearing. Each filling port is connected to the raceway on the slewing bearing. One end of the lubricating block is connected to the pump, and the other end is connected to one end of each lubricating pipe. The other end of each lubricating pipe is connected to the corresponding filling hole on the rotary platform. Each filling hole on the rotary platform is connected to the corresponding filling port on the rotary bearing. The input terminal of the controller is connected to the output terminal of each pressure sensor, and its output terminal is connected to the pump. Based on the pressure signals output by each pressure sensor and the preset grease filling strategy, the controller controls the operating status of the pump. The slewing bearing grease filling device also includes a distributor, which is connected to the lubrication block and the pump respectively, and is also connected to the controller. The controller controls the operating status of the pump and the distributor based on the pressure signals output by each pressure sensor and the preset grease filling strategy. The preset grease filling strategy includes: The controller sends a filling command and a filling time t0 to the dispenser and the pump; If, within the filling time t0, at least one of the pressure signals output by the N pressure sensors reaches the set pressure value p0, then the controller controls the distributor and pump to continue filling for a time t1, where t1 < t0. If, within the filling time t1, the pressure values ​​output by the N pressure sensors all reach the set value p0, then the grease filling is complete. If the pressure values ​​output by N pressure sensors do not reach the set value p0 within the filling time t0 or t1, the controller controls the distributor and pump to stop filling, rotates the upper vehicle 180°, and controls the distributor and pump to continue filling for time t2, t2 < t0. If the pressure values ​​output by N pressure sensors all reach the set value p0 within the filling time t2, it indicates that the grease filling is complete, and the controller controls the distributor and pump to stop filling. If the pressure values ​​output by N pressure sensors do not all reach the set value p0 within the filling time t2, the raceway on the slewing bearing is checked for blockage.

2. The grease filling device for a slewing bearing according to claim 1, characterized in that: The lubrication block is provided with a grease filling port, which is connected to the distributor.

3. The grease filling device for a slewing bearing according to claim 1, characterized in that: Each pressure sensor is set at equal intervals in the circumferential direction.

4. The grease filling device for a slewing bearing according to claim 1, characterized in that: Each lubrication pipe is connected to the corresponding filling hole on the rotary platform via an elbow.

5. A grease filling device for a slewing bearing according to claim 1, characterized in that: Each lubrication pipe is connected to the lubrication block via a lubrication connector.

6. The grease filling device for a slewing bearing according to claim 1, characterized in that: The number of pressure sensors and lubrication pipes is 3 each.

7. A grease filling method for a slewing bearing based on any one of claims 1-6, characterized in that, include: Each pressure sensor outputs a pressure signal to the controller. The controller controls the pump's operating status based on the pressure signals output by each pressure sensor and a preset grease filling strategy.

8. An excavator, characterized in that, The slewing bearing grease filling device includes any one of claims 1-6.

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