JPH0623838Y2 - Bearing lubricator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a bearing lubrication device for a vertical seawater pump having a rubber bearing.

(Prior Art) Vertical seawater pumps with rubber bearings require bearing lubrication water primarily for cooling the bearings. The bearing lubrication water extracts seawater from its own discharge during normal operation of the seawater pump and supplies it, but (hereinafter, this seawater is called self-pressurized water) is self-pressurized for some reason during pump startup or during operation. It also has a device to supply other water (fresh water) in case of water loss. Since the inside of the pipes that guide the self-pressurized water to the bearing is filled with seawater, marine life is significantly attached, and sometimes these pipes are clogged, so that the self-pressurized water decreases. When this phenomenon occurs, the passage of other water is also deteriorated, which may lead to loss of lubricating water and an accident such as burning of the rubber bearing.

Hereinafter, a conventional bearing lubrication device will be described with reference to FIG.

In FIG. 2, a vertical seawater pump 1 is provided with a rubber bearing 2 and a motor 3 above.

In general, the bearing lubrication device is composed of a self-pressure water lubrication system and another feed water lubrication system.

The other end of the self-pressurizing water pipe 5 branched from the discharge pipe 4 of the seawater pump 1 extends to the rubber bearing 2. In order to monitor the clogging of the strainers 8 and 9 for removing marine organisms and foreign substances, the inlet valves 6 and 7 and the outlet valves 10 and 11 and the strainers 8 and 9 before and after the strainers 8 and 9 in the path of the self-pressurized water pipe 5. And a differential pressure gauge 12 are provided. One of the two strainers 8 and 9 arranged side by side is a spare, and when one of the strainers 8 and 9 is clogged and the differential pressure becomes large, it is switched to the other strainer and used. At this time, the strainer that has been used for some time is removed from the system for cleaning.

On the other hand, the self-pressurized water pipe 5 has a flow rate switch 15 for monitoring the flow rate.
And the inlet valve 14 and outlet valve 16 before and after it, and the flow switch 15
Flow switch bypass pipe 17 equipped with a bypass valve 18 that isolates the flow switch 15 and allows water to flow in the event of an abnormality or failure
Is provided.

Further, in the case where the self-pressurized water is short of the self-pressurized water pipe 5, the solenoid valve 22 and the inlet valve 21 are provided to send the other water supply supplied from the other water supply source (fresh water) 19 through the other water supply pipe 20 to the rubber bearing 2. Another water supply system including the outlet valve 23 and the bypass valve 24 is provided.
A self-pressurized water check valve 13 and another water supply check valve 26 are provided on the respective upstream sides of the confluence point of the self-pressurized water pipe 5 and the other water supply pipe 20 so as not to backflow into each system.

(Problems to be solved by the invention) As can be seen from FIG. 2, the lubricating water supplied to the rubber bearing 2 is always the self-pressurized water of the pump 1 itself, and there is no self-pressurized water at the time of starting the pump. It is a mechanism to supply other water supply at times or when the water volume decreases. However, the self-pressurizing water pipe 5 that guides the self-pressurizing water
Since the inside of the container is always filled with seawater, marine organisms may adhere and grow, which may lead to clogging of pipes, sticking of the self-pressurizing water check valve 13 and the flow switch 15, sticking and the like.

For example, if clogging of marine life occurs between the A section of the self-pressurized water pipe 5 and the pump switch 2 inlet section B section through the flow switch 15, only a small amount of water can be supplied when other water is supplied. , Flow switch that detected insufficient flow rate
Even if the solenoid valve 22 is opened by the signal of 15, it does not lead to an increase in the flow rate, and eventually the operation of the seawater pump 1 must be stopped.

Therefore, it is necessary to disassemble the pipes and equipment in anticipation of such clogging of the self-pressurized water pipe 5 and perform cleaning regularly. However, from the A part to the B part, self-pressurized water and other There is a problem that this section cannot be cleaned because the seawater pump 1 flows alternately with the water supply, that is, it is a common part, and because this type of seawater pump 1 is in continuous operation. Furthermore, in this common area, corrosion of pipes and equipment,
Even if a problem such as sticking or leakage occurs, there is a problem in that it cannot be urgently repaired.

An object of the present invention is to provide a bearing lubrication device capable of continuous operation without stopping the seawater pump.

Further, another object of the present invention is to provide a bearing lubrication device capable of repairing a defective portion without stopping the seawater pump for corrosion, sticking, leakage or the like in piping or equipment during operation of the seawater pump. To do.

[Constitution of device]

(Means for Solving the Problems) In order to solve the above problems, the bearing lubrication device according to the present invention is a bearing lubrication device for lubricating a rubber bearing of a vertical seawater pump, which uses seawater as lubricating water. It has a self-pressure water lubrication system to be used and another feed water lubrication system that uses fresh water as lubrication water, and stops the other feed water lubrication system while the amount of lubrication water is secured in the self-pressure water lubrication system. In this case, the other water supply lubrication system is applied, and the self-pressurized water lubrication system and the other water supply lubrication system are configured by independent systems so that they can be applied independently.

(Function) The other water supply lubrication system, which is provided independently of the self-pressure water lubrication system for seawater, detects the shortage of the flow rate of the self-pressure water lubrication system for the other water supply, which is fresh water from another water supply source, and timely rubber bearing The continuous operation becomes possible without stopping the seawater pump.

Further, the self-pressurized water lubrication system and the other feed water lubrication system can be individually isolated and cleaned and repaired even when the seawater pump is operating.

(Embodiment) An embodiment of the present invention will be described below with reference to FIG.

Incidentally, in the configuration shown in FIG. 1, the components explained by the prior art are designated by the same reference numerals.

In FIG. 1, the self-pressurizing water pipe 5 branched from the discharge pipe 4 of the vertical seawater pump 1 is independently connected to the rubber bearing 2 via the strainer 8 and the self-pressurizing water check valve 13. It constitutes a pressurized water (seawater) lubrication system.

This independent self-pressurized water lubrication system is provided as close to the seawater pump 1 as possible to the self-pressured water pipe 5 branching from the discharge pipe 4 of the seawater pump 1, and the self-pressurized water withdrawal valve 27 and the inlet of the rubber bearing 2. A self-pressurized water supply valve 33 is provided as close as possible.

In addition, a conventional flow switch 15 is installed on the downstream side of the self-pressure water check valve 13.
The flow rate is measured instead of, for example, a flow meter 29 such as an electromagnetic flow meter, the inlet valve 28 and the outlet valve 29 before and after the flow meter 29, and when the flow meter 29 is abnormal or malfunctions, the flow meter 29 is isolated and water is passed. A flow meter bypass pipe 31 having a bypass valve 32 that operates is provided.

Further, in the case where the self-pressurized water in addition to the self-pressurized water pipe 5 is insufficient, the solenoid valve 22, the inlet valve 21, the outlet are provided so that the other water supply supplied from the other water supply source 19 through the other water supply pipe 20 is directly sent to the rubber bearing 2. Valve 23
Also, another water supply system including the bypass valve 24 is provided. In the other water supply lubrication system that supplies the other water supply to the rubber bearing 2 independently, the other water supply flow rate switch 35 for detecting the other water supply flow rate to protect the rubber bearing and the pump, and the inlet valve 34 and the outlet valve before and after the switch 35. Bypass valve that isolates the other water supply flow rate switch 35 and passes water when the other water supply flow rate switch 35 is abnormal or malfunctions.
The other water supply flow rate switch bypass pipe 37 provided with 38 is provided.

Further, another water supply source valve 39 is provided as close as possible to the rubber bearing 2 of the other water supply pipe 20.

A control panel 40 is provided for controlling and protecting the pump motor 3 by receiving the flow rate signal of the self-pressurized water flow meter 29, the signal of the other water supply solenoid valve 22, and the signal of the other water supply flow rate switch 35.

Next, the operation of the present invention will be described.

As can be seen from FIG. 1, the lubricating water supplied to the rubber bearing 2 is always the self-pressurized water of the seawater pump 1 itself, and when there is no self-pressurized water such as when the pump is started or when the amount of water falls. It is a mechanism to supply other water supply.

However, since the inside of the self-pressurizing water pipe 5 that guides the self-pressurizing water is always filled with seawater, marine organisms adhere and grow, and the seawater leaks due to clogging of the pipe, sticking of the self-pressurizing water check valve 13, sticking, or corrosion. In the case of occurrence, the amount of lubricating water is detected by a flow meter 29 such as an electromagnetic flow meter that does not have an operating part that often causes the occurrence of problems such as sticks, and the control panel 40 reliably receives the detection signal. When the flow rate is insufficient, the other water supply solenoid valve 22 is opened to directly supply the other water supply to the rubber bearing 2. Since the other water supply pipe 20 that supplies this fresh water supplies fresh water independently of the self-pressurized water pipe 5, there is almost no possibility of a shortage of flow rate due to no adhesion of marine organisms, corrosion of seawater, etc. The water supply flow rate switch 35 is used to monitor the rubber bearing lubrication water flow rate for final pump protection.

On the other hand, in the case of a malfunction such as clogging of the self-pressurized water pipe 5 or leakage due to corrosion, the self-pressurized water is automatically switched to another water supply, and the seawater pump 1 is continuously operated without stopping. Compressed water system self-pressurized water extraction source valve 27 and self-pressurized water supply source valve
By closing 39, the self-pressurizing water pipe or equipment, valves, etc. can be cleaned, repaired, or replaced as an isolated state without time restrictions.

During this time, fresh water is directly supplied to the rubber bearing 2 from an independent water supply lubrication system. Similar to the self-pressurized water system, the other water supply lubrication system is also provided with another water supply source valve 39 so that it can be isolated when a device of the other water supply lubrication system fails.

[Effect of device]

As described above, according to the present invention, there is an effect that continuous operation can be performed without stopping the seawater pump.

In addition, according to the present invention, the self-pressurizing water lubrication system is isolated without stopping the pump against the clogging of the self-pressurizing water lubrication system of the seawater pump's rubber bearing due to adhesion and growth of marine organisms or leakage due to corrosion. However, it can be cleaned and repaired without time constraints.

Further, according to the present invention, since the other water supply lubrication system as a backup system supplies the other water supply to the rubber bearing of the seawater pump independently of the self-pressurized water lubrication system, leakage due to clogging or corrosion of marine organisms does not occur. It is possible to stably supply other water supply without
The reliability of the bearing lubrication system is improved, and the soundness of the pump is maintained.

[Brief description of drawings]

FIG. 1 is a system diagram showing an embodiment of a bearing lubricating device according to the present invention, and FIG. 2 is a system diagram showing a bearing lubricating device according to the prior art. 1 …… Seawater pump, 5 …… Self-pressure water pipe 8,9 …… Strainer, 15 …… Flow switch 19 …… Other water supply source, 20 …… Other water supply pipe 22 …… Solenoid valve, 29 …… Flowmeter 35… … Other water supply flow rate switch, 40 …… Control panel

Claims (1)

[Scope of utility model registration request] 1. A bearing lubrication device for lubricating a rubber bearing of a vertical seawater pump, the device comprising a self-pressurized water lubrication system using seawater as lubricating water and another water supply using fresh water as lubricating water. In a configuration having a lubrication system, the other water supply lubrication system is stopped while the amount of lubrication water is secured in the self-pressure water lubrication system, and the water supply lubrication system is applied in other cases. The bearing lubrication device is characterized in that the self-pressurized water lubrication system and the other feed water lubrication system are configured as independent systems so that they can be independently applied.