Bearing thin oil lubrication oil cut-off automatic protection device

Abstract

The utility model belongs to the technical field of mining rotary drill equipment, and particularly relates to a bearing thin oil lubrication oil cut-off automatic protection device which is characterized by comprising a valve body, an internal thread I arranged on the inner wall of an oil inlet of the valve body, a pressure sensor arranged at the oil inlet, an ejector pin arranged in the valve body and a pressure spring connected with the ejector pin. And the spring compression adjusting nut is connected with the pressure spring and is in threaded connection with an internal thread II arranged on the inner wall of the oil outlet of the valve body. The device can be implemented on the basis of not changing the original structure of equipment, is simple and rapid, convenient to implement and popularize, remarkable in effect and low in input cost, can better ensure the accuracy of lubricating the bearing of the screw air compressor, and provides powerful guarantee for the whole-life stable operation of the bearing of the air compressor.

Description

Technical Field

[0001] This utility model belongs to the technical field of mining rotary drilling equipment, and in particular relates to an automatic protection device for bearing thin oil lubrication oil cut-off. Background Technology

[0002] Currently, the YZ35 series rotary drilling rigs are widely used in large-scale mining operations. The air compressor is a key component of the rig, providing the necessary airflow for drilling operations. The main air compressor is a screw compressor with a thin oil lubrication system for the head bearing. Sufficient lubrication of the air compressor must be ensured before and during operation. However, in actual operation, lubrication system defects such as oil spraying from the safety valve and oil leakage from the circulating oil pipes frequently cause lubrication delays or deficiencies, resulting in insufficient lubrication in the air compressor bearings. Furthermore, the operator in the control room may not be able to detect these issues promptly, leading to serious rig malfunctions and shutdowns. This can cause accelerated wear and direct burnout of the air compressor bearings, resulting in the scrapping of the air compressor unit or even a fire. Since existing pressure sensors cannot detect minute pressure values ​​and therefore cannot monitor bearing lubrication failure, solving the problem of detecting lubrication failure in the main air compressor bearings is crucial. Summary of the Invention

[0003] The purpose of this utility model is to provide an automatic protection device for bearing thin oil lubrication failure. Through the alarm function, it realizes the visualization of external forced lubrication of the screw air compressor head bearing, interlocks and automatically stops the machine, eliminates bearing failure caused by lubrication problems, maximizes the life of the head bearing, avoids equipment failure due to lack of lubricating oil, saves equipment costs, and improves production efficiency.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] The present invention relates to an automatic protection device for the interruption of oil supply in bearing thin oil lubrication, characterized in that it includes a valve body, an internal thread I disposed on the inner wall of the oil inlet of the valve body, a pressure sensor disposed at the oil inlet, a pin disposed inside the valve body, a pressure spring connected to the pin, a spring-compression adjusting nut connected to the pressure spring, and the spring-compression adjusting nut being threadedly connected to an internal thread II disposed on the inner wall of the oil outlet of the valve body.

[0006] The pressure sensor signal is connected to the control module, which is connected to an audible and visual alarm and also to the air compressor start-up control system.

[0007] The oil inlet end of the valve body's oil outlet chamber is provided with a conical platform, which mates with the conical surface of the ejector pin.

[0008] Advantages of this utility model:

[0009] This utility model's automatic protection device for bearing thin oil lubrication interruption can be implemented without changing the original structure of the equipment. It is simple, quick, easy to implement and promote, has significant effects, and low investment costs. It can better ensure the accuracy of screw air compressor bearing lubrication and provide strong protection for the stable operation of air compressor bearings throughout their entire lifespan. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0011] The specific embodiments of this utility model are further described below with reference to the accompanying drawings.

[0012] like Figure 1 As shown, the bearing thin oil lubrication automatic protection device of this utility model is characterized by comprising a valve body 1, an internal thread I3 disposed on the inner wall of the oil inlet 2 of the valve body 1, a pressure sensor 7 disposed at the oil inlet 2, a pin 4 disposed inside the valve body 1, a pressure spring 5 connected to the pin 4, a spring compression adjusting nut 8 connected to the pressure spring 5, and the spring compression adjusting nut 8 being threadedly connected to the internal thread II6 disposed on the inner wall of the oil outlet of the valve body 1.

[0013] The pressure sensor 7 signal is connected to the control module, which is connected to an audible and visual alarm and also to the air compressor start-up control system.

[0014] The oil inlet end of the oil outlet chamber of the valve body 1 is provided with a conical platform, which cooperates with the conical surface of the ejector pin 4.

[0015] This utility model provides an automatic protection device for bearing thin oil lubrication interruption, comprising a valve body 1, an oil inlet 2, a pressure sensor 7, an oil outlet chamber, a pin 4, a pressure spring 5, a spring-loaded adjusting nut 8, an oil outlet, an industrial control power supply, a relay, an audible and visual alarm, and a control module. The specific solution is as follows:

[0016] 1. Fabricate an automatic protection valve. Machine internal thread Ⅰ3 on the inner wall of the oil inlet 2 of valve body 1 and install a quick-connect fitting.

[0017] 2. Make a hole 50mm from the oil inlet of valve body 1 and install pressure sensor 7 to it;

[0018] 3. A conical platform is installed at the oil inlet end of the oil outlet chamber to mate with the conical surface of the ejector pin 4. The ejector pin 4 is held in place by a pressure spring 5. A spring-loaded adjusting nut 8 is installed at the bottom of the pressure spring 5 to adjust the pressure of the pressure spring 5 to a suitable value. An internal thread II 6 is provided on the inner wall of the oil outlet for installing a quick-connect coupling.

[0019] 4. Connect the automatic protection valve in series to the oil inlet of the air compressor head bearing lubrication line;

[0020] 5. During operation, lubricating oil enters the cavity through the oil inlet 2 and is balanced with the oil supply system pressure by the pressure spring 5 under the action of the pin 4. Pressure is generated in the cavity and transmitted to the pressure sensor 7 to activate it and send a signal.

[0021] 6. Connect the pressure sensor 7 signal to the control module, set the alarm range, set the audible and visual alarm, and connect it to the air compressor start control system.

[0022] 7. After the air compressor oil pump starts, lubricating oil enters valve body 1 through oil inlet 2. When the pressure is normal, the pressure sensor sends a signal allowing the air compressor to start, and the air compressor can start. When the pressure of pressure sensor 7 is lower than the threshold, the air compressor cannot start.

[0023] 8. During operation, if the air compressor head bearing suddenly loses oil, pressure sensor 7 will send a stop signal, the audible and visual alarm will activate, and the operator will be reminded to stop operation. After a 5-10 second delay, the air compressor will be stopped to prevent damage to other equipment.

[0024] This utility model has a simple structure, is easy to install, and has reliable stability. It effectively solves the problems of insufficient oil supply and accidents caused by oil cut-off in the air compressor head bearing, saves equipment costs, improves production efficiency, and ensures stable production operation.

Claims

1. An automatic protection device for oil cut-off in bearing thin oil lubrication, characterized in that, Includes a valve body, an internal thread I on the inner wall of the oil inlet of the valve body, a pressure sensor at the oil inlet, a pin inside the valve body, a pressure spring connected to the pin, a spring-compression adjusting nut connected to the pressure spring, and the spring-compression adjusting nut being threadedly connected to an internal thread II on the inner wall of the oil outlet of the valve body.

2. The bearing thin oil lubrication automatic protection device according to claim 1, characterized in that, The pressure sensor signal is connected to the control module, which is connected to an audible and visual alarm and also to the air compressor start-up control system.

3. The automatic protection device for oil cut-off of bearing thin oil lubrication according to claim 1, characterized in that, The oil inlet end of the valve body's oil outlet chamber is provided with a conical platform, which mates with the conical surface of the ejector pin.

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