A lubrication system central processing device for a sliding bearing spindle

Abstract

The application provides a lubrication system centralized processing device of a sliding bearing main shaft, comprising an oil inlet pipeline and an oil return pipeline, wherein the oil inlet pipeline comprises an oil pump and a filter, a throttle valve is installed on the oil return pipeline, and a liquid flow signal meter is installed on the oil return pipeline; the oil pump, the filter, the throttle valve and the liquid flow signal meter are all installed on a mounting frame to form an integral modular structure. The lubricating oil return is provided with a liquid flow signal device, which can ensure that the main shaft is started only after the oil return is effective, and the main shaft operation is better guaranteed, the service life of the main shaft is prolonged, and the equipment of the oil inlet pipeline and the equipment on the oil return pipeline are integrated, which is more convenient and fast in control, maintenance and installation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of machine tools, and particularly relates to a lubrication system of a sliding bearing spindle for machine tools. BACKGROUND

[0002] In high-precision and high-rigidity application scenarios, the spindle of a machine tool (especially a grinding machine) often adopts a sliding bearing structure. The sliding bearing has high requirements for the lubrication system. Generally, the lubrication system requires: low-pressure and large-flow oil supply, the oil pump outlet generally adopts an oil circuit parallel mode for oil supply, the flow of each branch needs to match the flow requirements of each lubrication point, and the oil temperature of the lubrication system needs to be controlled; the lubricating oil needs to have an oil inlet filtering system to ensure the cleanliness of the oil product. The existing centralized lubrication system generally has progressive oil supply, small flow, and no oil return signal device, and is not suitable for machine tool sliding bearings. The existing lubrication system for sliding bearings of machine tools (especially grinding machines) has a complex oil supply flow adjustment device and low integration. For example, the grinding machine lubricating oil pretreatment device and method disclosed in the publication No. CN107891371A do not have an oil return signal device in the machine tool lubricating oil system, which may cause the spindle to start without effective oil return, resulting in spindle wear and affecting the service life. In addition, the machine tool lubricating oil device has low integration, the oil inlet device part and the oil return device part are separately installed, the structure is complex, and the installation and control are not convenient. SUMMARY

[0003] The technical problem to be solved by the present application is how to design a spindle lubrication system to better protect the spindle and save costs and facilitate control.

[0004] The present application is implemented by the following technical solutions:

[0005] A lubrication system centralized processing device for a sliding bearing spindle, comprising an oil inlet pipeline and an oil return pipeline, wherein the oil inlet pipeline comprises an oil pump and a filter, a throttle valve is installed on the oil return pipeline, and a liquid flow signal meter is installed on the oil return pipeline, wherein the oil pump, the filter, the throttle valve, and the liquid flow signal meter are all installed on an installation rack to form an integrated modular structure.

[0006] As a preferred, the liquid flow signal meter comprises a base, a signal meter cover, a float rod movably connected to the signal meter cover, and two float balls fixed on the float rod, the base and the signal meter cover have an oil storage space therebetween, the float balls are arranged in the oil storage space, the upper and lower float balls form a set of float ball switches, the upper float ball is connected to a normally open contact at the liquid level, the lower float ball is connected to a normally open contact at the liquid level, the two contacts are connected to a signal element of an electrical system through a cable, and the liquid level is monitored.

[0007] As a preferred, a screw plug is connected to the upper end of the float rod, and an exhaust hole penetrating through the screw plug is arranged on the screw plug.

[0008] The screw plug is adjustably screwed with the end of the float ball rod, and the screw plug is provided with a positioning protrusion for preventing the screw plug from falling into the signal gauge cover.

[0009] The signal gauge cover is preferably made of transparent material.

[0010] The lubricating oil distribution block with a three-way structure is installed on the oil inlet pipeline, forming two oil outlets, and the flow adjusting bolts for adjusting the oil outlet flow are installed on the two oil outlets.

[0011] The liquid level adjusting device is installed on the pipeline between the liquid flow signal gauge and the throttle valve, and the liquid level adjusting device has a channel communicating with the outside world and is movably connected to the pipeline.

[0012] The liquid level adjusting device is a hollow rod, and the lower part of the rod is screw-sealedly connected to the pipeline.

[0013] The pipeline between the liquid flow signal gauge and the throttle valve is a three-way pipe, and the three ends of the three-way pipe are connected to the throttle valve, the liquid flow signal gauge and the liquid level adjusting device respectively.

[0014] The lubricating oil return pipe is provided with a liquid flow signal device, which can ensure that the main shaft is started only after the return of the lubricating oil is effective, thereby ensuring the operation of the main shaft and prolonging the service life of the main shaft. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The figure is a structural schematic diagram of the whole application;

[0016] Figure 2 The figure is a top view of the application;

[0017] Figure 3 The figure is Figure 2 The figure is a sectional view in the direction of A-A;

[0018] Figure 4 The figure is a schematic diagram of the connection structure between the centralized processing device and the main shaft. DETAILED DESCRIPTION

[0019] The application will be further described below in combination with examples.

[0020] Example

[0021] As Figures 1-4The lubrication system centralized processing device of a sliding bearing spindle shown in the figure comprises an oil inlet pipeline and an oil return pipeline, wherein the oil inlet pipeline comprises an oil pump 1 and a filter 2, a throttle valve 3 is installed on the oil return pipeline, the throttle valve is a valve for adjusting flow, the structure thereof belongs to the prior art and will not be described in detail herein, and the liquid flow signal meter 4 is installed on the oil return pipeline, wherein the oil pump 1, the filter 2, the throttle valve 3 and the liquid flow signal meter 4 are all installed on an installation rack 5 to form an integral modular structure. In the embodiment, the installation rack 5 is installed on an oil tank, the oil suction pipe of the oil pump 1 extends into the oil tank, the lubricating oil filtered by the filter 2 is then divided into two paths by a lubricating oil distribution block 8 and is sent to the positions requiring lubrication at the two ends of the spindle 9, and then the lubricating oil is recovered. When the lubricating oil is recovered, it flows back to the oil tank through the oil return pipeline, the liquid flow signal meter 4 and the throttle valve 3 in sequence and is reused. In the embodiment, the lubricating oil distribution block 8 with a three-way structure is installed on the oil inlet pipeline after the filter 2, forming two oil outlets 81, and the flow adjusting bolts 82 for adjusting the oil flow are installed on the two oil outlets. When the flow requirements of the front and rear sliding bearings are different, the flow adjusting bolts 82 of the lubricating oil distribution block 8 are adjusted to realize the distribution of the lubricating oil flow.

[0022] In order to simplify the structure, the liquid flow signal meter 4 is designed to comprise a base 41, a signal meter cover 42, a float ball rod 43 movably connected to the signal meter cover 42 and a float ball 44 fixed to the float ball rod 43 in the embodiment. The base 41 has an oil inlet port 411 and an oil outlet port 412, and the float ball 44 is arranged in an oil storage space between the base 41 and the signal meter cover 42. The upper and lower float balls form a complete set of float ball switches, the upper float ball is connected to a normally open contact at the liquid level, the lower float ball is connected to a normally open contact at the liquid level, and the two contacts are connected to the signal element of the electrical system through a cable and realize the monitoring of the liquid level. In the embodiment, the float ball is a typical two-liquid-level float ball switch, which is externally connected to a normally open contact and a normally closed contact. The liquid level is used as a signal, and different liquid levels (different lubrication conditions) correspond to different spindle start, stop and emergency stop signals.

[0023] The liquid flow signal meter 4 with the structure of the float ball 44 is simpler in structure, lower in cost and better in stability. In order to facilitate the observation of whether there is oil return in the liquid flow signal meter 4, the signal meter cover 42 is designed to be made of transparent material in the embodiment, so that whether there is oil return can be found more intuitively, thereby determining whether to start the work of the spindle.

[0024] The liquid level adjusting device 6 is installed on the pipeline between the liquid flow signal meter and the throttle valve 3, and has a channel communicating with the outside. The liquid level adjusting device 6 is movably connected to the pipeline and can be lifted up and down. In this embodiment, the liquid level adjusting device 6 is a hollow rod, and the lower part of the rod is threadedly connected to the pipeline. The liquid level of the liquid flow signal meter 4 is adjusted by adjusting the position of the rod. The pipeline is a tee 7, and the three ends of the tee 7 are connected to the throttle valve 3, the liquid flow signal meter 4 and the liquid level adjusting device 6 respectively. When the flow rate controlled by the throttle valve 3 is small and the oil return is large, the liquid level in the liquid flow signal meter 4 will rise, and the liquid level in the liquid level adjusting device 6 will also rise. When the liquid level in the liquid level adjusting device 6 is higher than the set level, it will overflow, and the throttle valve 3 needs to be controlled to adjust the flow rate.

[0025] In this embodiment, a screw plug 45 is connected to the upper end of the floating ball rod 43. The screw plug 45 is provided with an exhaust hole 452 extending upward and downward. The screw plug 45 is adjustably threadedly connected to the end of the floating ball rod 43. The screw plug 45 is provided with a positioning protrusion 451 to prevent the screw plug 45 from falling into the signal meter cover 42. The upper end of the floating ball rod 43 is suspended on the signal meter cover 42 by the positioning protrusion 451 of the screw plug 45.

[0026] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only to illustrate the principles of the present application. Simple changes and substitutions made by those skilled in the art without departing from the spirit and scope of the present application are also within the protection scope of the present application.

Claims

1. A lubrication system central processing device for a sliding bearing spindle, comprising an oil feed line and an oil return line, wherein the oil feed line comprises an oil pump and a filter, and a throttle valve is arranged in the oil return line, characterized in that: The oil return pipeline is provided with a flow signal meter, wherein the oil pump, the filter, the throttle valve and the flow signal meter are installed on a mounting frame to form an integral modular structure; the flow signal meter comprises a base, a signal meter cover, a float rod movably connected to the signal meter cover and two floats fixed to the float rod; the base and the signal meter cover have an oil storage space therebetween, and the floats are arranged in the oil storage space; the upper and lower floats form a set of float switches; the upper float is connected to a normally open contact at the oil level, and the lower float is connected to a normally open contact at the oil level; the two contacts are connected to a signal element of an electrical system through a cable to monitor the liquid level; a liquid level adjusting device is installed on the pipeline between the flow signal meter and the throttle valve; the liquid level adjusting device has a passage connected to the outside; and the liquid level adjusting device is movably connected to the pipeline.

2. A centralized processing device for a lubrication system of a plain bearing spindle according to claim 1, characterized in that The upper end of the float rod is connected to a screw plug, and the screw plug is provided with an exhaust hole penetrating therethrough.

3. A centralized processing device for a lubrication system of a plain bearing spindle according to claim 2, characterized in that The screw plug is adjustably screwed to the end of the float rod, and the screw plug is provided with a positioning protrusion to prevent the screw plug from falling into the signal meter cover.

4. A centralized processing device for a lubrication system of a plain bearing spindle according to claim 1, characterized in that The signal meter cover is made of transparent material.

5. A centralized processing device for a lubrication system of a sliding bearing spindle according to one of claims 1 to 4, characterized in that The oil inlet pipeline is provided with a lubricating oil distribution block with a three-way structure, forming two oil outlets; flow regulating bolts for regulating the oil outlet flow are installed on the two oil outlets; when the front and rear sliding bearings require different flow, the flow regulating bolts of the lubricating oil distribution block are adjusted to regulate the passage diameter and realize the distribution of the lubricating oil flow.

6. A centralized processing device for a lubrication system of a sliding bearing spindle according to one of claims 1 to 4, characterized in that The liquid level adjusting device is a hollow rod, and the lower part of the rod is threadedly and sealingly connected to the pipeline; the position of the rod is adjusted to adjust the liquid level of the flow signal meter.

7. A centralized processing device for a lubrication system of a sliding bearing spindle according to one of claims 1 to 4, characterized in that The pipeline between the flow signal meter and the throttle valve is a three-way pipe, and the three ends of the three-way pipe are connected to the throttle valve, the flow signal meter and the liquid level adjusting device, respectively.

Images