JPH08189564A - Oil level monitor of mechanical seal chamber - Google Patents

Abstract

PURPOSE: To prevent a delay in the oil feeding timing and the maintenance timing by automatically detecting the highest level of an oil level and the lowest level of the oil level requiring oil feeding in an oil pot or maintenance of a mechanical seal, and also giving an alarm. CONSTITUTION: When an oil level in an oil pot 10 is lowered to the lowest level LO requiring oil feeding or maintenance of a mechanical seal, this is detected by a second float 14B of a level detecting means 14, and is also confirmed by giving an alarm by an alarm means 16 composed of a buzzer or a display lamp. When the oil level in the oil pot 10 rises up to the highest level HO requiring maintenance of the mechanical seal, this is detected by a first float 14A of the level detecting means 14, and is also confirmed by giving an alarm by the alarm means 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil level monitoring device for a mechanical seal chamber, which monitors the oil level of lubricating oil in a mechanical seal chamber and automatically gives an alarm.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 3, a mechanical seal (not shown) is arranged in a mechanical seal chamber 2 provided adjacent to a device 1 such as a pump, and the mechanical seal is used to rotate the device 1. While sealing the shaft 3,
In the mechanical seal device configured to seal and lubricate the sliding end surface of the mechanical seal with the lubricating oil O sealed in the mechanical seal chamber 2, the lubricating oil O is naturally consumed over time or the sealing force of the mechanical seal is increased. When the sealability is impaired due to the decrease, the phenomenon that the lubricating oil O flows into the device 1 side or the fluid on the device 1 side flows into the mechanical seal chamber occurs, and the amount of lubricating oil in the mechanical seal chamber 2 is reduced. Inconvenience to reduce occurs. However, in the conventional mechanical seal device, since the system for monitoring the lubricating oil in the mechanical seal chamber 2 is not adopted, it is not possible to confirm the occurrence of the inconvenience. Therefore, there is a risk that the timing of refueling the mechanical seal chamber 2 and the timing of maintenance of the mechanical seal may be delayed.

Therefore, as shown in FIG. 2, an oil supply port 5 communicating with the mechanical seal chamber 2 through an oil supply pipe 4, an air introduction port 7 communicating with the mechanical seal chamber 2 through a ventilation pipe 6, and an exhaust gas. A lubrication port 9 that is normally detachably closed by a plug 8 is provided, and a lubricating oil O of a mechanical seal is provided inside at a normal level O of about 1/2.
A communication pipe type oil level gauge 11 is provided which is equipped with an oil pot 10 stored up to L and is connected to the inside of the oil pot 10. The overflow pipe 1 is provided in an overflow hole 12.
An oil level monitoring device for a mechanical seal chamber having a structure in which 3 is connected is conceivable.

In this type of oil level monitoring device, the oil pot 10 is installed above the mechanical seal chamber 2. Therefore, the lubricating oil O, which is removed from the exhaust plug 8 and injected into the oil pot 10 from the oil filling port 9, is filled in the mechanical seal chamber 2 from the oil filling port 5 through the oil feeding pipe 4 in a filled state, and is shown in the figure. Not lubricate the sealing surface of the mechanical seal. At this time, the air in the mechanical seal chamber 2 replaced with the lubricating oil O is introduced into the oil pot 10 from the air introduction port 7 through the ventilation pipe 6 and is exhausted from the exhaust plug 8. As described above, the fact that the lubricating oil O is stored in the oil pot 10 up to the normal level OL of about 1/2 indicates that the mechanical seal chamber 2 is filled with the lubricating oil O.

Therefore, if the lubricating oil O is consumed spontaneously with time, or if the lubricating oil O flows into the equipment 1 such as a pump, the oil level in the oil pot 10 is lowered. This decrease in the oil level can be confirmed by visually observing the oil level gauge 11 of the communicating pipe type. When the oil level in the oil pot 10 is lowered to the minimum level LO, the minimum level LO of the oil level is visually confirmed by the oil level gauge 11 of the communicating pipe type to refuel the oil pot 10 or maintain the mechanical seal. Should be done. On the other hand, when the fluid on the device 1 side flows into the mechanical seal chamber 2, the lubricating oil O deteriorates and becomes cloudy. This cloudy state can be confirmed by visually observing the communication pipe type oil level gauge 11. Further, when the oil level in the oil pot 10 rises to the maximum level HO due to the fluid on the device 1 side flowing into the mechanical seal chamber 2, the maximum level HO of this oil level is measured by the communication pipe type oil level gauge 11. It is sufficient to visually check and maintain the mechanical seal. Therefore, the oil pot 1
It is possible to prevent the timing of refueling to 0, that is, the timing of refueling the mechanical seal chamber 2 or the timing of maintenance of the mechanical seal from being delayed.

However, the monitoring of the oil level fluctuation in the oil pot 10 is left only to the operator visually observing the oil level gauge 11 of the communicating pipe type. For this reason, the oil level in the oil pot 10 is lowered to the minimum level LO, and it is necessary to replenish the oil in the oil pot 10 or maintain the mechanical seal. There is a possibility that the timing and the timing of maintenance may be delayed, and even though the oil level in the oil pot 10 rises to the maximum level HO and the mechanical seal needs maintenance, the operator is also monitored. This may cause a delay in the maintenance timing.

[0007]

The problem to be solved is to refuel the oil in the oil pot or to maintain the mechanical seal, but the timing and maintenance of the refueling are prevented by the operator's oversight. That is, there is a possibility that the timing may be delayed.

[0008]

According to the present invention, there are provided an oil supply port communicating with a mechanical seal chamber via an oil supply pipe, an air introduction port communicating with the mechanical seal chamber via a ventilation pipe, an exhaust hole and an oil supply port. In addition to being provided, it has an oil pot that stores lubricating oil for the mechanical seal,
In the oil level monitoring device of the mechanical seal chamber equipped with the oil level gauge of the communicating pipe installed in communication with the inside of this oil pot, both the highest level and the lowest level of the oil level are set inside the oil pot. A level detecting means for detecting is provided, and an alarm means for giving an alarm is provided based on detection of both the highest level and the lowest level of the oil surface by the level detecting means. The objective of preventing the delay of the timing of refueling and the timing of maintenance by automatically detecting the state in which refueling or maintenance of the mechanical seal is necessary and by issuing an alarm was achieved.

[0009]

According to the present invention, when the oil level in the oil pot is lowered to the minimum level requiring lubrication into the oil pot or maintenance of the mechanical seal, the minimum level of the oil level is detected by the level detecting means. , Based on this minimum level detection, an alarm is issued by an alarm means,
It is possible to positively confirm the decrease in oil level. Also,
When the oil level in the oil pot rises to the maximum level requiring maintenance of the mechanical seal, the maximum level of the oil level is detected by the level detection means, and the alarm means issues an alarm based on this maximum level detection, You can confirm the rise of the oil level.

[0010]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram showing an embodiment of the present invention. It should be noted that the same or corresponding portions as those of the conventional example of FIG. 3 and the comparative example of FIG. In FIG. 1, the oil level monitoring device includes an oil supply port 5 that communicates with a mechanical seal chamber 2 through an oil supply pipe 4, an air introduction port 7 that communicates with the mechanical seal chamber 2 through a ventilation pipe 6, and an exhaust plug. 8 is provided with an oil filling port 9 which is normally detachably closed by the valve 8, and the lubricating oil O is about 1 /
An oil level gauge 11 of the communication pipe type is provided, which is equipped with an oil pot 10 that has been stored up to a normal level OL of 2, and is installed in communication with the inside of the oil pot 10. Further, an overflow hole 12 is formed in the oil pot 10, and an overflow pipe 13 is connected to the overflow hole 12.

The oil pot 10 is installed above the mechanical seal chamber 2. Therefore, the lubricating oil O removed from the exhaust plug 8 and injected into the oil pot 10 from the oil supply port 9 is filled in the mechanical seal chamber 2 from the oil supply port 5 through the oil supply pipe 4 in a filled state, and is shown in the figure. Not lubricate the sealing surface of the mechanical seal. At this time, the air in the mechanical seal chamber 2 replaced with the lubricating oil O is
It is introduced into the oil pot 10 from the air introduction port 7 through the ventilation pipe 6 and is exhausted from the exhaust plug 8. As described above, the fact that the lubricating oil O is stored in the oil pot 10 up to the normal level OL of about 1/2 indicates that the mechanical seal chamber 2 is filled with the lubricating oil O.

On the other hand, inside the oil pot 10, there is provided a level detecting means 14 for detecting both the highest level HO and the lowest level LO of the oil level. The level detecting means 14 includes a first float 14A for detecting the highest level,
A second float 14B for detecting the lowest level and a guide rod 14C penetrating both floats 14A, 14B in a vertically movable manner.
A float type oil level gauge equipped with a guide bar 14
The upper end of C is electrically connected to one terminal (not shown) of the terminal block 14d in the terminal box 14D detachably attached to the upper opening of the oil pot 10. The other terminal (not shown) of the terminal block 12d is the power source 1
5 and alarm means 1 consisting of a buzzer or an indicator light
6 is electrically connected.

Next, the operation of the above configuration will be described. When the oil level in the oil pot 10 drops to the minimum level LO requiring oil supply to the oil pot 10 or maintenance of the mechanical seal, the minimum level LO of this oil level is the second float 14B of the level detecting means 14.
Based on the detection of the lowest level LO, the alarm is issued by the buzzer of the alarm means 16 or the lighting of the indicator light. This makes it possible to confirm that the oil level has dropped to the lowest level LO. Further, when the oil level in the oil pot 10 rises to the maximum level HO requiring maintenance of the mechanical seal, the maximum level HO of this oil level is detected by the first float 14A of the level detecting means 14, and this maximum level HO is detected. Based on the detection of HO, an alarm is issued by buzzing the buzzer or lighting of the indicator light which constitutes the alarm means 16. This makes it possible to confirm that the oil level has risen to the maximum level HO. Therefore, it is possible to reliably prevent the timing of refueling the oil pot 10, that is, the timing of refueling the mechanical seal chamber 2 or the timing of maintenance of the mechanical seal from being delayed.

[0014]

As described above, according to the present invention, when the oil level in the oil pot is lowered to the minimum level requiring oil supply to the oil pot or maintenance of the mechanical seal, or maintenance of the mechanical seal is performed. When the required maximum level is reached, these conditions can be automatically detected by the level detection means, and an alarm can be issued based on this detection to confirm the status. There is no delay in the timing of the above or the timing of maintenance of the mechanical seal. .

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of the present invention.

FIG. 2 is a system diagram showing a comparative example.

FIG. 3 is a system diagram of a conventional example.

[Explanation of symbols]

 2 Mechanical seal chamber 4 Oil supply pipe 5 Oil supply port 6 Vent pipe 7 Air inlet port 8 Exhaust plug (exhaust hole) 9 Lubrication port 10 Oil pot 11 Oil level gauge 14 Level detection means 16 Alarm means O Lubricating oil HO Maximum oil level Level LO Minimum oil level

Claims (1)

[Claims] 1. An oil supply port communicating with the mechanical seal chamber via an oil supply pipe, an air introduction port communicating with the mechanical seal chamber via a ventilation pipe, an exhaust hole and an oil supply port are provided inside and In the oil level monitoring device of the mechanical seal chamber, which has an oil pot that stores lubricating oil of the mechanical seal, and is equipped with a communicating pipe type oil level gauge that is installed in communication with the inside of this oil pot, A level detecting means for detecting both the highest level and the lowest level of the oil level is provided inside, and an alarm means for issuing an alarm based on the detection of both the highest level and the lowest level of the oil level by this level detecting means. An oil level monitoring device for a mechanical seal chamber, which is provided.