JPS58138294A - Bearing section cooling water feeding device for magnet pump - Google Patents

Abstract

PURPOSE:To eliminate the necessity of expensive city water as the shaft cooling water, by simply filtering the suspended substance from a portion of a carrying liquid containing a lot of suspended substance to produce a clean liquid then circulating it for the purpose to lubricate and cool to the bearing section of a pump. CONSTITUTION:During the filtering by means of a filtering means 31A equipped with a tubular porous filter 26 made by binding a fine grain ceramics with a binder, a valve 42 at the lower end of said filtering means 31A is opened under the state where the valves 40 and 32 are opened, then a portion of the clean water from said means 31b will flow into said means 31A then flow from the innercircumference toward the outercircumference of said means 31A and the suspended substance adhered on the surface of said filter 26 is removed through counter cleaning. Thereafter the valves 35, 38 connected to a suction pipe 37 and the valves 42, 48 connected to a counter-wash water returning pipe 45 are alternatively exchanged between open and close, to feed the clean water filtered through a plurality of filters 26 continuously to the bearing section of the pump body 24.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling water supply device for a bearing portion of a magnetic pump that supplies cooling water from the outside to a bearing portion of a magnetic pump that transfers a liquid containing many suspended substances.

BACKGROUND ART Conventionally, leak-free magnetic rotation magnet pumps have been widely used in the chemical industry that handles six spikes of chemical solution, or in the petrochemical industry where there is a risk of ignition caused by leakage.

Conventionally used magnetic pumps include, for example, an impeller 1 made of metal, synthetic resin, or ceramics, as shown in Fig. 1, and a driven s2 made of a similar material.
A driven magnet 8 is fixed on the outer periphery near the other end of the driven shaft 8, and the driven magnet 8 is held in a fluid-tight manner by the cover 4. A liquid-tight driven magnet 8VM is installed in a can 7 made of metal or the like fixed to the case 6 of the pump body i, and the other end of the driven magnet 8 is attached to the inner bottom of the canf via a bearing 8. In addition to being supported, the driven shaft 2 is also mounted in another bearing 9 at the rear of the impeller l.
It is supported by and rotatably held, and furthermore, on the outside of the can 7 W4#M is a drive facing the tsumugi magnets) 8! ) 10 is attached to and arranged on a rotating body 1B integrated with a rotating shaft 11 connected to a motor (not shown),
Generally, these are all housed in a case 6 made of black for the pump body.

However, such a conventional magnetic pump cools and lubricates the bearings 8 and 9 by flowing a portion of the pressurized fluid discharged from the pump as shown by the broken line arrow.
Since this is carried out by circulating the liquid from the middle part of the impeller 1 to the low-pressure suction part of the central part of the impeller 1, there is no sand or sand in the transferred liquid.
Iron powder, other IIl [i11! When transferring slurry that contains a large amount of l, there is a disadvantage that the bearings 8 and 9 will break down in a short period of time, and sometimes the flow holes for broken liquid provided in the driven shaft or impeller l 18 was blocked by M uniformity, and there were drawbacks such as the fact that the bearing part could not be cooled or lubricated by light.

Therefore, in order to solve these drawbacks, cooling and lubrication of the bearing part is not performed by circulating the transfer liquid itself, but by supplying tap water, etc. to the bearing part from the outside, for example, as shown in Figure S. A magnetic pump was first invented and released by the applicant.

This pump consists of an impeller 14, a rotating part consisting of a sleeve part 14/of the impeller, a driven magnet 16, a cover 17, etc., and a fixed hollow main shaft 80 in a can body 19 with a driving magnet 18 arranged around the outer periphery. It is rotatably supported by bearings z1 and 88, and a part of the main @go has a structure in which it liquid-tightly penetrates the casing 25 on the suction side of the pump body 24, which has a bent fluid passage 88, and protrudes to the outside. Therefore, if tap water or the like is supplied from the outside into the main ago of the hollow body, the bearing s1 and the bearing 22 can be lubricated and cooled.

However, if tap water or the like is continuously supplied to the bearing portion during long-term operation, the cooling cost is still high.

The present invention was made in order to solve these problems, and instead of using tap water, etc., the pumped liquid is temporarily passed through, and the clarified liquid is continuously supplied to the bearing part of the magnetic pump as cooling water from the outside. A feeding device comprising at least 8 filtration means installed in parallel, each having a plurality of pores 1i [filters, etc.] and a part of the liquid pumped by the pump being introduced into at least one transiting means; a first cooling water supply means for supplying the clarified liquid passed by the means to the bearing part of the pump; and a valve for supplying a part of the liquid pumped by the pump when the filter of one of the passing means is clogged. N11ll of
By switching li, it is introduced into the other P1 means and its 'F-
J-Second supply of clarified liquid from the handprint to the bearing part of the pump
A part of the clarified liquid from one door means is flowed back into the other means whose filter is clogged to backwash the filter, and the washing water is supplied to the suction hook of the pump. The return backwash consists of a return flat membrane and more! This is a cooling water supply device for the bearing part of the pump.

To further explain the structure of the present invention based on FIG. 8 showing an example of an integrated body, a cylindrical porous filter i6 made of preferably ceramic fine particles hardened with a binder is distributed in a can body g7 in a number fL. , 28 are provided with at least eight filter means 81 and 81B having a structure defined by bolts 80 on a support plate 89, and the upper end of the filter means 81 is connected to a pump via a cooling water supply pipe 88 via a valve 82. It is connected to the cooling water supply port 84 of the main shaft 80' of the main body 'B4, and the lower end of the pump means 81 is connected to the discharge port 86 of the pump main body 24 through a valve 86 and a water pipe 8. A cooling water supply plane wave is formed.

Also, a branch pipe of the water suction 81 is connected to the bottom of the other P arm 81B via a valve 88, and the upper end of the P arm 81B is connected to the cooling water supply pipe 8δ via a valve 89. It is connected to the cooling water supply port 84 of the main shaft 20 to form an eighth cooling water supply means.

Additionally, at least two filter hands! i81m and 8
The upper end of 1B is connected to the valve 40 by a tring 4t, and the lower ends of the filter means 81 and 81B are connected to the suction port 44 of the pump body z4 through the pulp 4s and 48 and a backwash water return pipe 46. A backwash return means is also formed, and the bearing cooling water supply device for the magnet pump is constituted by at least each of these means.

The operation will be explained based on the specific example shown in FIG. A portion flows into the filtration means 81 through the water suction pipe 8 and the pulp 86 due to the pressure difference between the discharge port and the suction port. In this case, the other pulps a@, 41 and 48 connected to the bottom of P and 81B are closed.

The liquid introduced into the P1 means δ1 passes through a cylindrical porous filter 86 from the outer periphery to the inner periphery, whereby suspended matter is filtered by the filter s6 and becomes a clear liquid.
The clarified liquid passes through the pulp 83 through the flow fL and s8, and then enters the cooling water supply pipe 88! ..., the pump body 34
The first cooling water supply means supplies the cooling water to the cooling water supply port 84 of the main shaft 80, and connects the bearings 81 and g8 to the main shaft fingering part 1.
After lubrication with 5 and cooling of bearings zl and 82, it circulates as shown by the arrow and is mixed and discharged into the transferred liquid. In this case valves 89 and 40 may be open or closed.

If the filter 86 of the filtration means 81m is clogged with WIIA turbidity, the pulp δ6 connected to the lower end of the filtration means 81m is closed, and the pulp 88 connected to the lower end of the filtration means 81B is opened. The suspension is removed by the multifilament filter g6 of the second filtration means 81B in the same manner as described above, and the clarified liquid passes through the pulp 89 and the cooling water supply pipe 88 to the main shaft of the pump body 24 in the same manner as described above. The cooling water is supplied to the cooling water supply port 84 of go by the S-th cooling water supply means. Then, during the continuation of the filtration by the filter hand JQ81B, the pulp 40 and/or the pulp 81tt-
When the valve 4 at the lower end of the filtration means 81B is opened by the lowering motion, a part of the clarified liquid from the filtration means 81B is transferred to the filtration means 81B.
Because it flows from the inner periphery of the filter 86 to the outer periphery of the filter 86 with a -transfer rate of 81? One means of 81mm filters
The suspended matter deposited on the surface of pump 6 can be removed by backwashing, and the cleaning water can be pumped into the pump body s.
The backwash water can be returned to the suction port 44 of No. 4 through a return pipe 4i. In this case, the pulp 4s is filter s6
It is preferable to close the pump once the backwashing is completed and the suspended material is returned to the suction side of the pump.

And at least pulps 85 and 88 connected to the water suction pipe shaft. and pulp 4 connected to backwash water return pipe 4rI
2 and 48 are alternately switched 111'r/I5, this device can continuously supply the water filtered by several filters g6 to the bearing part of the pump body 84. Note that the filter z6 does not have to be in the cylindrical shape shown in FIG. 8 (though it may of course be in a plate shape or in other shapes, but it is best to use a cylindrical shape because it can have a large overarea. Any type of II structure that can be installed in parallel and switched is sufficient.In addition, 8g of pulp connected to the upper ends of at least 8 filtration means.
, 89 and 40 are not necessarily required, and the pulps 85 and 88 and the pulps 48 and 48 may not be provided separately, but may each be of a three-way valve type.

! In addition, the magnet pump does not have to be of the III construction shown in FIG. S, but may be of any structure as long as it can supply cooling water for the purpose of lubrication and cooling to the bearing portion from the outside.

As described above, although the bearing cooling water supply device of the present invention has a simple structure, it still has a cooling water supply of Nt! ! / Easily suspend the part of the transfer liquid containing a lot of J? 1llI of the clarified liquid and pump the clarified liquid! Since 11!11#I can be supplied to the 1 receiving part for the purpose of lubrication and cooling, there is no need to use more expensive water than tap water as shaft cooling water, and the timer ◆ A pump that automatically switches open and close the pulp can automatically supply cooling water while the pump is operating, and can be easily connected to a pump that supplies shaft cooling water from the outside. Therefore, it is extremely useful in violet industry.

[Brief explanation of the drawing]

@111! J is a # side view showing a specific example of a conventional magnetic pump, Fig. 3 is a cross-sectional view showing an integrated example of a magnets F pump to which the cooling water supply device of the present invention can be connected, and Fig. 8 is a view showing the bearing section from the outside. FIG. 2 is a diagram showing a state in which the cooling water supply device of the present invention is connected to a magnetic recirculation pump that supplies cooling water to the vehicle. 1.14... Impeller, 8... Subordinate 1m [+, 8,
1!5... Driven magnet, 4.17... Cover,
5.24... Honbu body, 6... Case, 1...
Can, 8,9゜1, H...Bearing, 10.18...
・Drive magnet, 11.1.1g1 rotation axis, ljI...
・Same rotation body, 18...Distribution, 16...Main aid removal part, 1
9...Can body, 0...Main shaft, 2δ...Fluid passage,
26...Casing, i6...Porous filter,
z7...can body, sl...distribution, g29...support plate, 80...bolt, 81mu, 81B
...-hyperflated membrane, ag, 85, JI8, 89
, 40 , 42 , 48... Valve, 88... Cooling water supply pipe, 84... Cooling water supply port, 44... Suction port, 4B... Backwash water return pipe. Patent applicant Hikari Mitsuko Co., Ltd.

Claims (1)

[Claims] ! At least installed in parallel with porous filters! first cooling water that introduces a portion of the liquid pumped by the pump into at least one passing means and supplies the clear liquid filtered by the passing means to the bearing portion of the pump; When the supply means and the filter of one of the filtration means become clogged, a part of the liquid pumped by the pump is transferred to the other filtration means by switching the pulp. & A second cooling water supply means for supplying the liquid to the bearing part of the pump, and a part of the clarified liquid from one filtration means is flowed back into the other passage means where the filter is clogged to reverse the filter. 1. A cooling water supply device for a bearing part of a magnet pump, comprising at least a backwash return child that performs cleaning and returns the cleaning water to the suction side of the pump.