Automatic lubricating device for shaft seal of mechanical vacuum pump

Abstract

The utility model provides a mechanical vacuum pump shaft seal automatic lubricating device which comprises an oil supply station, a flow control mechanism, a mechanical vacuum pump and a control box, the oil supply station is connected with an oil injection port at the mechanical vacuum pump shaft seal through an oil supply pipe A. The flow control mechanism comprises an on-off valve and a flow valve. The on-off valve and the flow valve are arranged on the oil supply pipe A in series, a liquid level meter is arranged in the oil supply station, and the liquid level meter and the electromagnetic valve are electrically connected with the control box. By arranging the electromagnetic valve and the control box, the control box is used for controlling the electromagnetic valve to be opened and closed regularly and controlling the oil distribution station to supplement and inject lubricating oil to the shaft seal of the mechanical vacuum pump regularly and quantitatively, so that the oil quantity of the lubricating oil at each shaft seal is guaranteed, and the shaft seal of the mechanical vacuum pump is continuously lubricated; in addition, the amount of lubricating oil injected into each shaft seal is adjusted by arranging a manual valve, and the device is simple, convenient and low in cost.

Description

Technical Field

[0001] The utility model belongs to the technical field of pump body maintenance and relates to a pump body lubrication device, in particular to an automatic lubrication device for a mechanical vacuum pump shaft seal. Background Art

[0002] The maintenance of the mechanical vacuum pump lubrication device is a kind of maintenance that needs to be performed frequently in the refining furnace of the metallurgical industry. The traditional maintenance method is to manually use an oil cup to inject oil into the shaft seal of the mechanical vacuum pump or use a lubrication pump to inject oil. The oil injection and lubricating oil remaining conditions of both need to be manually checked and judged, which cannot guarantee stable, continuous and reliable lubrication. The frequency of manual maintenance is high and the lubrication cost is high. Utility Model Content

[0003] The utility model aims to provide an automatic lubricating device for a mechanical vacuum pump shaft seal, so as to solve the technical problem that the lubricating device in the prior art cannot automatically, continuously and stably lubricate the mechanical vacuum pump reliably.

[0004] In order to achieve the above purpose, the specific technical solution of the utility model is as follows:

[0005] An automatic lubrication device for a mechanical vacuum pump shaft seal comprises an oil supply station, a flow control mechanism, a mechanical vacuum pump and a control box, wherein the oil supply station is connected to the oil filling port at the mechanical vacuum pump shaft seal via an oil supply pipe A, the flow control mechanism comprises an on-off valve and a flow valve, the on-off valve and the flow valve are arranged in series on the oil supply pipe A, a liquid level gauge is arranged in the oil supply station, and the liquid level gauge and the solenoid valve are electrically connected to the control box respectively.

[0006] The oil supply station includes a main oil station and a sub-oil station. The oil outlet of the main oil station is connected to the oil inlet of the sub-oil station through a lubrication pump. An electric-controlled liquid level switch and an alarm bell are provided in the main station. The electric-controlled liquid level switch is electrically connected to the control box. When the liquid level reaches the lower limit level of the electric-controlled liquid level switch, the alarm bell sounds to remind personnel to add lubricating oil to the main oil station.

[0007] A magnetic floating liquid level gauge is installed in the oil distribution station. The magnetic floating liquid level gauge transmits the oil level position to the control box, and the control box controls the start and stop of the lubrication pump according to the liquid level signal transmitted by the magnetic floating liquid level gauge.

[0008] The on-off valve is a solenoid valve, and the flow valve is a manual valve.

[0009] The oil supply pipe A is a transparent rubber hose.

[0010] The mechanical vacuum pump is a Roots pump.

[0011] The beneficial effect of the utility model is that the utility model provides an automatic lubrication device for the shaft seal of a mechanical vacuum pump, and by setting an oil supply station and a flow control mechanism that can automatically be used for mechanical vacuum pumps, stable and continuous automatic lubrication of the shaft seal of the vacuum pump is achieved, without the need for frequent manual inspection of the remaining lubricating oil.

[0012] The utility model sets a solenoid valve and a control box, uses the control box to control the solenoid valve to open and close regularly, and controls the oil distribution station to replenish and inject lubricating oil into the shaft seal of the mechanical vacuum pump in a timely and quantitative manner, so as to ensure the amount of lubricating oil at each shaft seal, thereby continuously lubricating the shaft seal of the mechanical vacuum pump; in addition, the flow rate is adjusted by setting a manual valve to adjust the amount of lubricating oil injected into each shaft seal per unit time, which is simple, convenient and low-cost; at the same time, the utility model also sets the oil supply pipe A as a transparent rubber hose, so that the oil level of the lubrication point is visible, and the staff can understand the lubrication condition of the shaft seal by observing the oil level in the transparent rubber hose, and then adjust the opening amount of the manual valve and the on and off time of the solenoid valve and the on / off interval time, which is simple and convenient. The technical solution provided by the utility model, through the use of an electrically controlled liquid level switch and an alarm bell, enables the main oil station to have a low-level alarm function, thereby reminding the user to replenish lubricating oil to the main oil station in time; according to the liquid level signal transmitted by the oil distribution station, the control box controls the start and stop of the lubrication pump, thereby ensuring the oil volume of the oil distribution station, significantly improving the continuity and stability of the lubrication of the mechanical vacuum pump, and reducing the probability of equipment failure due to wear, and is suitable for promotion and application in vacuum pump body maintenance devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the connection of various components of the utility model.

[0014] Explanation of the markings in the figure: 1. Main oil station, 2. Oil distribution station, 3. Solenoid valve, 4. Manual valve, 5. Mechanical vacuum pump, 6. Oil supply pipe A. DETAILED DESCRIPTION

[0015] In order to better understand the purpose, structure and function of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings.

[0016] like Figure 1 As shown, the utility model provides an automatic lubrication device for the shaft seal of a mechanical vacuum pump 5, which includes an oil supply station, a flow control mechanism, a mechanical vacuum pump 5 and a control box. In this embodiment, the mechanical vacuum pump 5 is selected as a Roots pump; the oil supply station is connected to the oil filling port at the shaft seal of the Roots pump through an oil supply pipe A6. In order to facilitate the staff to observe the lubricating oil level at the oil filling port of the Roots pump, in this embodiment, a transparent hose is selected as the oil pipe connecting the oil supply station and the Roots pump;

[0017] The flow control mechanism includes an on-off valve and a flow valve, which are arranged in series on the oil supply pipe A6. A liquid level meter is arranged in the oil supply station, and the liquid level meter and the solenoid valve 3 are electrically connected to the control box respectively, wherein the control box can be a circuit control system with a timing switch, or a control system with a PLC controller. In order to simplify the circuit and improve the degree of automation of the device, the control box in this embodiment is a control system with a PLC controller.

[0018] In this embodiment, the on-off valve is controlled by a control box to open and close at a fixed time, so that the device can automatically fill oil into the oil filling port at the shaft seal of the Roots pump. Combined with adjusting the opening degree of the flow valve, the single oil filling amount to the oil filling port can be effectively controlled. In addition, in order to facilitate control, the on-off valve in this embodiment is a solenoid valve 3, and the flow valve is a manual valve 4. When the Roots pump is in different working conditions, the amount of lubricating oil required is also different. At this time, the oil supply to the oil filling port at the shaft seal can be adjusted by directly adjusting the opening degree of the manual valve 4, which is simple and quick.

[0019] Specifically, Figure 1 As shown, in this embodiment, in order to ensure continuous and sufficient oil supply to the lubricating oil filling port of the Roots pump, the oil supply station includes a main oil station 1 and a sub-oil station 2. The oil outlet of the main oil station 1 is connected to the oil inlet of the sub-oil station 2 through a lubricating pump, which is used to replenish the lubricating oil in the sub-oil station 2 in time. The main oil station 1 is provided with an electric control liquid level switch and an alarm bell, and the electric control liquid level switch is electrically connected to the control box. When the liquid level in the main oil station 1 reaches the lower limit liquid level of the point switch, the alarm bell sounds to remind personnel to add lubricating oil to the main oil station 1.

[0020] A magnetic floating liquid level gauge is installed in the oil distribution station 2, and the magnetic floating liquid level gauge is electrically connected to the control box. The magnetic floating liquid level gauge transmits the oil level position to the control box, and the control box controls the start and stop of the lubrication pump according to the liquid level signal transmitted by the magnetic floating liquid level gauge.

[0021] In addition, the device in this embodiment is also provided with an alarm mechanism, which can be a control screen of a PLC controller, or a buzzer or alarm light arranged on a control box. The staff can choose according to the actual situation, and no specific limitation is made in this embodiment.

[0022] In specific applications, the control and working principles of this embodiment are as follows:

[0023] 1. When starting the Roots pump, the control box controls the solenoid valve 3 to open automatically for 5 seconds, so that the oil distribution station 2 can supply lubricating oil to the Roots pump, and then controls the solenoid valve 3 to close automatically. After that, every 30 minutes when the Roots pump runs, the control box opens the solenoid valve for 35 seconds, and then closes it to realize automatic oil supply;

[0024] The staff adjusts the manual valve 4 according to the lubricating oil consumption rate of each shaft seal position of the Roots pump in different time periods to adjust the oil supply amount of different shaft seal positions to meet the lubricating oil consumption within a single oil supply cycle, thereby ensuring continuous lubrication.

[0025] 2. When the magnetic level gauge detects that the oil level in the oil distribution station 2 reaches the set low level, it transmits a signal to the control box, and the control box controls the lubrication pump to start, so that the lubricating oil in the main oil station 1 is replenished to the oil distribution station 2 in time; when the electric control level switch detects that the oil level in the main oil station 1 drops to the minimum oil level, it transmits a signal to the control box, and the PLC controller installed on the control box alarms the staff through the control screen, or alarms through the alarm light or buzzer, so as to remind the staff to replenish the lubricating oil in the main oil station 1 in time.

[0026] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An automatic lubrication device for a mechanical vacuum pump shaft seal, characterized in that: It comprises an oil supply station, a flow control mechanism, a mechanical vacuum pump (5) and a control box. The oil supply station is connected to the oil filling port at the shaft seal of the mechanical vacuum pump (5) via an oil supply pipe A (6). The flow control mechanism comprises an on-off valve and a flow valve. The on-off valve and the flow valve are arranged in series on the oil supply pipe A (6). A liquid level meter is arranged in the oil supply station. The liquid level meter and the on-off valve are electrically connected to the control box respectively.

2. The automatic lubrication device for a mechanical vacuum pump shaft seal according to claim 1, characterized in that: The oil supply station comprises a main oil station (1) and a sub-oil station (2), the oil outlet of the main oil station (1) is connected to the oil inlet of the sub-oil station (2) via a lubrication pump, an electric-controlled liquid level switch and an alarm bell are arranged in the main oil station (1), and the electric-controlled liquid level switch is electrically connected to a control box; A magnetic floating liquid level gauge is installed in the oil distribution station (2), and the magnetic floating liquid level gauge is electrically connected to the control box.

3. The automatic lubrication device for a mechanical vacuum pump shaft seal according to claim 1, characterized in that: The on-off valve is a solenoid valve (3), and the flow valve is a manual valve (4).

4. The automatic lubrication device for a mechanical vacuum pump shaft seal according to claim 1, characterized in that: The oil supply pipe A (6) is a transparent rubber hose.

5. The automatic lubrication device for the shaft seal of a mechanical vacuum pump according to claim 1, characterized in that: The mechanical vacuum pump (5) is a Roots pump.

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