JPS61180826A - Canned motor and line homomixer - Google Patents

Abstract

PURPOSE:To eliminate a shaft seal part and liquid leak by forming a liquid path in such a manner that at least one liquid of two or more liquids which are blended and mixed flows through the path and cooling of a canned motor and lubrication of its bearings are made by this liquid. CONSTITUTION:Fuel oil from a fuel tank 5a is supplied to supply hole 50 after being pressurized and heated by a fuel pump 6a and a heater 7a respectively and water from a water tank 5b is supplied to supply hole 51 after being pressurized and heated by a water pump 6b and a heater 7b respectively. During operation, water 10 cools a canned motor 31 and lubricates two slide bearings 42a, 42b and flows into a line homomixer 32 via the canned motor. At the mixer, fuel oil 4 and water 10 are mixed and then blended and mixed by a mixing blades 46a at the side of the canned motor 31 and flow through the space 57 between a rotating partition plate 45 and a mixing cylinder 47 and blended and mixed again by a mixing blades 46 at the side of outlet hole 56. Fuel oil 4 and water 10 are emulsified and form emulsion fuel 13 which is supplied to a burner 8 from the outlet hole 56.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a canned motor line homomixer.

[Conventional technology]

In recent years, various test results have confirmed that the use of emulsion fuel in combustors such as boilers and heating furnaces that use liquid fuel has a remarkable effect on energy saving and reducing exhaust gas pollution, and emulsion fuel is rapidly becoming popular. be.

The device for producing this emulsion fuel is configured to be built into the combustor oil supply line, as shown in FIG.
is opened, and fuel oil 4 such as C heavy oil is supplied through a conventional oil supply line from fuel tank 5a - fuel oil bomb 6a - heater 7a - bypass valve 3 - combustor 8. When combustion is stabilized, valve 1,
2 is opened and the bypass valve 3 is closed, the fuel oil 4 is sent to the fuel tank 5a - fuel oil bomb 6a - heater 7a - valve 1 - line homomixer 9, and water 10 is sent to the water tank 5b - water Bomb 6b - Heating 1157b - Valve 11 - Water is sent to line homomixer 9, and if necessary, emulsifier (surfactant) 12 is sent to emulsifier tank 5C - emulsifier bomb 6C - line homomixer 9. Fuel oil 4 and water 10 are mixed and stirred in mixer 9 to form emulsion fuel 13, which is then supplied to line homomixer 9 - valve 2 - combustor 8 .

Mixers used in the emulsion fuel manufacturing apparatus include injection mixers and static mixers, but compared to these mixers, the line homomixer 9 changes the amount of fuel oil 4 and water 10 supplied to the mixer. However, the degree of emulsion fuel conversion to 13 tends not to be greatly affected.

This line homomixer 9 includes mixing stirring blades 14a,
14b is attached to a rotating shaft 15 and disposed within the mixing and stirring cylinder 16, and the rotating shaft 15 is connected to a bearing 18a via a shaft sealing portion 17, 17 of a gland packing or mechanical seal.

By supporting it with 18b and 18c and connecting it to an electric motor 1i20 with a shaft joint 19, and rotating the mixing stirring blades 14a and 14b with this electric motor 20,
10 each for fuel oil pump 6a and water pump 6b
~30 K9/t: Pressure is applied to i and heater 7
a, 7b to 80-150°C, and supply port 21.
Fuel oil 4 and water 10 are mixed and stirred to form an emulsion fuel 13, which is supplied from a discharge port 23 to a combustor 8.

[Problem that the invention seeks to solve]

However, since the conventional line homomixer 9 has a shaft seal 17 such as a gland packing or a mechanical seal, it is basically impossible to eliminate liquid leakage, and furthermore, it is difficult to control the amount of emulsion fuel 13 supplied to the combustor 8. The fluid leakage increases due to pressure fluctuations caused by this, and this fluid leakage increases fuel consumption and pollutes the surrounding environment, and in rare cases, the leaked fuel may ignite and cause a fire.

In addition, as mentioned above, fuel oil 4 and water 10 are 10 to 30 K.
Since it is pressurized to fl/ci and heated to 80 to 150°C before being supplied to the line homomixer 9, the gland packing and mechanical seal shaft sealing part 17 require extremely expensive high-temperature and high-pressure products. However, its lifespan was not fully satisfactory, and maintenance and inspection required a great deal of effort, time, and cost.

In addition to the above-mentioned emulsion fuel manufacturing apparatus, line homomixers used for emulsifying paints, agricultural chemicals, etc. also had similar problems.

The present invention has been made in view of the above-mentioned problems, and eliminates the need for the shaft seal, basically eliminates liquid leakage, and reduces equipment costs.
To provide a canned motor line homomixer with low operating and maintenance costs.

(Means for solving the problems) The configuration of the canned motor line homomixer of the present invention is as follows:
A mixing and stirring blade of a line homo mixer is attached to the rotating shaft of the canned motor, and the canned motor and the line homo mixer are integrated in a liquid-tight manner, and two or more liquids are mixed and stirred by the line homo mixer. A liquid passage is formed through which at least one liquid passes through the canned motor to cool the canned motor and lubricate the bearing.

[Effect]

When at least one of the two or more liquids mixed and stirred by the line homomixer flows through the liquid passage and passes through the canned motor, the canned motor is cooled and the bearings are lubricated.

The two or more liquids supplied to the line homomixer through the canned motor, directly, or both are mixed and agitated and emulsified by the mixing stirring blade rotated by the canned motor. .

The temperature of the liquid passing through the canned motor is increased by cooling the main canted motor, so the viscosity of the liquid being mixed and stirred is reduced and the mixing and stirring action is promoted, or the emulsion fuel manufacturing device The overall efficiency is improved when used in

Further, the line homomixer and the canned motor are integrally provided in a liquid-tight manner, and the seal portion does not have a rotating seal portion, that is, a gland packing or a shaft seal portion of a mechanical seal, but only a stationary seal portion. Therefore, there is basically no leakage.

〔Example〕

Next, an embodiment in which the present invention is applied to a mixer of the emulsion fuel manufacturing apparatus will be described based on the drawings.

In FIG. 1, reference numeral 30 denotes a canned motor line homomixer configured by integrally providing a canned motor 31 and a line homomixer 32 in a liquid-tight manner.
A stator frame 34 is attached to the outer periphery of the stator 33, and a stator can 35 is tightly inserted into the inner periphery of the stator 33. A rotor 36 facing the stator 33 is disposed inside the stator can 35, a rotating shaft 37 is inserted and fixed to the inner periphery of the rotor 36, and a rotating shaft 37 is inserted and fixed to the outer periphery of the rotor 36. The child can 38 is closely covered and welded in a liquid-tight manner.

Further, a front bearing box 39a is attached to the front flange portion 34a of the stator frame 34 via an O-ring 4G, and a rear bearing box 39b, which also serves as an end cover, is attached to the rear flange portion 34b via a gasket 41. A sliding bearing 42a is attached to both the bearing boxes 39a and 39b in a liquid-tight manner.

42b are respectively mounted, and both sliding bearings 42a.

42b through sleeves 43a, 43b and thrust collars 44a, 44b, respectively.
1 is rotatably supported.

The line homo mixer 32 is connected to the canned motor 3
1, that is, from the front bearing box 39a side, and the mixing and stirring blades 46a and 46b are inserted and attached to the rotating shaft 37 protruding from the front bearing box 39a side, with the rotational partition plate 45 in between, and the mixing and stirring blades 46
a, 46b and a mixing/stirring cylinder 41 disposed so as to cover the rotary support plate 45, and the flange portion 48 of this mixing/stirring cylinder 4T is connected to the front bearing box via a gasket 49 and the O-ring 40. It is fluid-tightly attached to the front flange portion 34a of the stator frame 34 of the canned motor 31 with the canned motor 31 sandwiching the flange 39a.

A fuel oil pump 6a and a heater 1 are connected to the canned motor 31 side of the mixing and stirring cylinder 41 from the fuel oil tank 5a.
Pressurize and heat up at point a, and pass through valve 1 to line homomixer 32.
A supply port 50 for fuel oil 4 to be supplied to the other side of the canned motor 31, that is, the rear bearing box 39 is provided.
b is provided with a supply port 51 for water 10 which is pressurized and heated from a water tank 5b by a water pump 6b and a heater 1b and is supplied to the canned motor 31 via a valve 11. 51 - Rear plain bearing 42b - Rear rotor chamber 52 -
Stator can 35 and rotor key 1! Gap 53- with the ring 38
Front rotor chamber 54 - A liquid passage 55 passing through the front plain bearing 42a and the canned motor 31 and leading to the line homomixer 32 while cooling the canned motor 31 and lubricating both the plain bearings 42a and 42b. is formed.

Further, at the tip of the mixing and stirring cylinder 47, there is a discharge port 56 for supplying emulsion fuel 13, which is produced by emulsification of the fuel oil 4 and water 10 by mixing and stirring, to the combustor 8 via the valve 2. Further, as shown by the chain line, the emulsifier 12 is pressurized directly from the emulsifier tank 5C or by the emulsifier pump 6C as necessary to the water pump 6b.
It is configured so that it can be supplied to desired locations such as the front and rear, the rear bearing box 39b, or the mixing and stirring cylinder 47.

57 is a gap between the rotary support plate 45 and the mixing/stirring cylinder 47, and 3 is a bypass valve.

In the canned motor line homomixer 30 configured in this way, the fuel oil 4 is pressurized and heated from the fuel tank 5a by the fuel oil pump 6a and the heater 7a, and then transferred to the supply port 50.
When the water 10 is pressurized and heated from the water tank 5b by the water pump 6b and the heater 7b and is supplied to the supply ports 51, the water 10 flows from the supply port 51 to the rear plain bearing 42b to the rear part. The liquid flows through the rotor chamber 52 - the gap 53 between the stator can 35 and the rotor can 38 - the front rotor chamber 54 - the front sliding bearing 42a and the liquid passage 55, that is, cooling the canned motor 31 and cooling both the sliding bearings 42a, 4.
While lubricating the fuel oil 2b, it passes through the canned motor 31 and reaches the line homomixer 32, where the fuel oil 4
and water 10 are mixed and stirred by the mixing stirring blade 46a on the side of the canned motor 31, and then the rotating splitting plate 45
The fuel oil 4 and water 10 are emulsified and emulsion fuel 13 is generated by further mixing and stirring by the mixing and stirring blade 46b on the discharge port 56 side through the gap 57 between the fuel oil 4 and the mixing and stirring cylinder 41. Emulsion fuel 13 is supplied to combustor 8 through outlet 56 .

According to the configuration of the canned motor line homomixer 30 of this embodiment, the seal part does not have a rotating seal part, that is, a gland packing or a shaft seal part of a mechanical seal, and is only a stationary seal part, so basically There is no liquid leakage, so there is no risk of increased fuel consumption or pollution of the surrounding environment due to liquid leakage, or the risk of leaked fuel igniting and causing a fire. There is no need for the gland packing or mechanical seal shaft seal part 17, which is extremely expensive due to high pressure, has an unsatisfactory service life, and is extremely complicated to replace, so maintenance and inspection are extremely easy, and equipment costs are reduced.
The total cost is greatly improved in terms of lower operating cost and lower maintenance cost.

In addition, the water 10 passing through the liquid passage 55 is
31, the temperature of the heater 7b is increased, so when the device is used in an emulsion fuel production device as in this embodiment, the heat energy required for the heater 7b is reduced by the amount of temperature increase. The overall efficiency of the mixing and stirring is improved, and in some cases, the heater 7b is no longer necessary, resulting in a lower cost, and even when used in other than the emulsion fuel production apparatus, the viscosity of the mixed and stirred liquid is reduced and the mixing and stirring action is improved. This has the effect of accelerating the process and reducing the amount of power required.

By the way, in the above embodiment, Cantomo-931
The flow resistance of the liquid passage 55 passing through the inside is relatively large, and the amount of fuel oil 4 supplied is 3 to 5 times larger than that of water 10, and the viscosity is extremely high, resulting in considerable flow loss. Therefore, fuel oil 4 is supplied to the supply port 50 on the line homo mixer 32 side, and water 1 is supplied to the supply port 51 on the canned motor 31 side.
However, if the production amount of the emulsion fuel 13 is small, that is, if the number of supply ports for the fuel oil 4 and water 10 is small, or if the capacity of the fuel oil pump 6a is sufficiently large, the above-mentioned Contrary to the embodiment, it is also possible to supply the water 10 to the supply port 50 on the line homomixer 32 side and the fuel oil 4 to the supply port 51 on the canned motor 31 side, and furthermore, as shown in FIG. A supply port 50 for fuel oil 4 and a supply port 51 for water 10 are provided in the rear bearing box 39b, and both fuel oil 4 and water 10 are supplied to the canned motor 31.
A liquid passage 5 passing through the interior and leading to the line homo mixer 32
In this case, the fuel oil 4 and the water 10 are mixed by the rotor 36 while being mixed by the canned motor 3.
1, the effect of improving the mixing and stirring ability can also be expected.

Next, FIG. 3 shows another embodiment, in which three mixing stirring blades 46a are used in the embodiment shown in FIG.

46b and 46c are rotating support plates 45a and 46c, respectively.
The fuel oil 4 supply port 50 is located between the re-rotation dividing plates 45a and 45b, and the mixing and stirring cylinder 47 has a fuel oil 4 supply port 50 located between the re-rotation partition plates 45a and 45b, and a front bearing box of the canned motor 31. A supply port 51 for water 10 is provided between the rotary support plate 45a on the side of the bearing box 39a and the rotary shaft 31 in the rear rotor chamber 52 of the canned motor 31. An auxiliary pump 59 is liquid-tightly integrated with the canned motor 31 to which an auxiliary impeller 58 is attached, and which is driven by the canned motor 31. An in-shaft passage 60 leading to the inner diameter part of the auxiliary impeller 58 is provided, and a through hole 62 is provided in the fastening bolt 61 of the rear sleeve 43b and thrust collar 44b, so that one end of the circulation vibro 3 is connected to the recirculation part of the mixing and stirring cylinder 47. The other end between the rotating support plates 45a and 45b is connected to the rear bearing box 39b.
The line homo mixer 32 is connected to the canned motor 3 and is integrally provided on one side of the canned motor 31 in a liquid-tight manner.
A part of the mixed liquid 64 of fuel oil 4 and water 10 that is being mixed and stirred in the line homomixer 32 is transferred to the line homomixer 32 by the action of the auxiliary pump 59. It passes through the circulation vibro 3 to the bolt through hole 62 - the shaft in-shaft passage 60 - the auxiliary invera 58 - the rear rotor chamber 52, and from this rear rotor chamber 52 a portion passes through the rear slide bearing 42b to the bolt through hole 62. Most of the remaining portion is transferred to the gap 53 between the stator can 35 and the rotor can 38, the front rotor chamber 54, the front plain bearing 42a, and the line homomixer 32 for cooling the canned motor 31 and for cooling the canned motor 31. A liquid passage 55 is formed that circulates through the canned motor 31 while circulating the slide bearings 42a and 42b.

According to this embodiment, a part of the mixed liquid 64 of fuel oil 4 and water 10 that is being mixed and stirred in the line homomixer 32 is circulated through the liquid passage 55 and passed through the canned motor 31, so that the line As in the case of each of the above embodiments in which the entire amount of either one or both of the fuel oil 4 and water 10 is passed through the canned motor 31 before being supplied to the homomixer 32, the fuel oil 4 and the water 10 are In other words, the amount of emulsion fuel 13 produced is not limited mainly by the flow path resistance of the liquid passage 55 passing through the canned motor 31, and is not limited by the capacity of the fuel oil pump 6a or water pump 6b. A canned motor line homomixer 30 with a large mixing and stirring capacity is obtained.

In the embodiment shown in FIG. 3, a heat exchanger 65 is provided in the middle of the circulating vibro 3 as shown in FIG. If this is done, that is, if the water 10 mixed and stirred with the fuel oil 4 is also used as cooling water for the heat exchanger 65,
The water 10 is removed by the mixed liquid 64 flowing through the circulating vibro 3
The temperature will be raised, so it will be heated by that amount! 7b, or the heater 7b becomes unnecessary, and the mixed liquid 64 flowing into the canned motor 31 through the circulating vibro 3 is cooled by the water 10, so that the canned motor 31 is cooled. The effect is improved.

When the canned motor line homomixer 30 having the configuration of this embodiment is used as a mixer other than an emulsion manufacturing device, a relatively low-temperature liquid among two or more types of liquids to be mixed and stirred is also used as the cooling liquid of the heat exchanger 65. Bye.

Next, FIG. 5 shows still another embodiment, in which the rotating shaft 31 of the canned motor 31 is not protruded from this canned motor 31 but is housed inside it, and the mixing stirring blade 46a
, 46b are arranged in the front rotor chamber 54 and rear rotor chamber 52 of the canned motor 31, respectively, and are attached to the rotating shaft 37, and each of the mixing stirring blades 46a
, 46b, the stator can 35 of the canned motor 31 is also used as the mixing and stirring cylinder 47 of the line homomixer 32, and the line homomixer 32 is configured inside the canned motor 31, that is, the line The homomixer 32 and the canned motor 31 are integrally provided in a liquid-tight manner, and the canned motor 31
The front bearing box 39a and the rear bearing box 39b are each used as an end cover, and the front bearing box 39a is filled with emulsion fuel 1.
The rear bearing box 39b is provided with a supply port 50 for fuel oil 4 and a supply port 51 for water 10, and the fuel oil 4 and water supplied from this meat supply port 50. 10 is mixed and stirred in the rear rotor chamber 52 and the front rotor chamber 54 by the stirring blades 46a and 46b.While being mixed and stirred, the mixed liquid 64 moves inside the canned motor 31 between the rear sliding bearing 42b, the rear rotor v52, and the stator can 35.
Gap 63 between the rotor can 38 and the front opening 54
It flows from the front sliding bearing 42a to the discharge port 56 to cool the canned motor 31 and to the f of both sliding bearings 42a and 42b.
A liquid passage 55 is formed for IJ slippage.

This embodiment is relatively suitable for producing emulsion fuel from raw stone, and a line homomixer 32 is installed in the canned motor 31.
Since the canned motor line homomixer 30 is integrally constructed, it is possible to provide a small and relatively inexpensive canned motor line homomixer 30.

Although the present invention has been described above with reference to an example in which it is applied to a line homomixer of an emulsion fuel production device, it can of course also be applied to a line homomixer that mixes and stirs two or more liquids, such as emulsifying paints and agricultural chemicals. The number and shape of the stirring blades are not limited to those in each of the above-mentioned embodiments, and any suitable one may be used depending on the application, and the auxiliary pump is also not limited to the above-mentioned embodiments, but may be integrally provided with the canned motor in a liquid-tight manner. Any device that is driven by this canned motor may be used, and in addition to a sliding bearing, a ball bearing can also be used depending on the liquid.

〔Effect of the invention〕

According to the canned motor line homomixer of the present invention,
The seal part does not have a rotating seal part consisting of a gland packing or a shaft seal part of a mechanical seal, but only a stationary seal part, so there is basically no liquid leakage, and therefore there is no loss due to liquid leakage, contamination of the surrounding environment, and It does not pose a risk of fire, and since the temperature of the mixed and stirred liquid increases as it passes through the canned motor, the viscosity of the mixed and stirred liquid decreases, promoting the mixing and stirring action and reducing the required power. Or, when mixing and stirring heated liquids as in the emulsion fuel production equipment, the thermal energy of the heater is reduced, improving the overall efficiency of the equipment. When mixing and stirring high-pressure liquids, there is no need for gland packings or mechanical seal shaft seals, which are expensive, have unsatisfactory service life, and are extremely complicated to replace, making maintenance and inspection extremely easy. , the total cost is significantly improved due to low operating and maintenance costs.

[Brief explanation of the drawing]

1 to 5 are longitudinal sectional front views showing different embodiments of the canned motor line homomixer of the present invention, and FIG. 6 is a longitudinal sectional front view of a conventional emulsion fuel production apparatus. 31... Canned motor, 32... Line homo mixer, 37 - Rotating shaft, 42a, 42b -- Bearing, 4
6a. 46b, 46c...Mixing stirring blade, 47...Mixing stirring cylinder, 55...Liquid passage, 59...Auxiliary pump, 63...
・Circulation vibe, 65...heat exchanger. February 6, 1985

Claims (5)

[Claims] (1) A mixing and stirring blade of a line homo mixer is attached to the rotating shaft of the canned motor, and the canned motor and the line homo mixer are integrated in a liquid-tight manner, and the two types are mixed and stirred by the line homo mixer. A canned motor line homo mixer, characterized in that a liquid passage is formed through which at least one of the above liquids passes through the canned motor to cool the canned motor and lubricate the bearings. (2) Attach the mixing and stirring blade of the line homomixer to the rotating shaft protruding from one side of the canned motor, and attach the mixing and stirring cylinder of the line homomixer that covers the mixing and stirring blade to the canned motor in a liquid-tight manner. and a liquid passage for supplying at least one of the two or more liquids to be mixed and stirred in the line homo mixer from the other side of the canned motor, passing through the canned motor, and introducing it into the line homo mixer. A canned motor line homomixer according to claim 1, characterized in that the canned motor line homomixer is formed. (3) Attach the mixing and stirring blade of the line homo mixer to the rotating shaft protruding from one side of the canned motor, and attach the mixing and stirring cylinder of the line homo mixer that covers the mixing and stirring blade to the canned motor in a liquid-tight manner. An auxiliary pump driven by this canned motor is provided integrally in a liquid-tight manner, and the other side of the canned motor and the line homomixer are communicated through a circulation pipe, so that one of the mixed liquids in the line homomixer is connected to the other side of the canned motor. 2. The canned motor according to claim 1, further comprising a liquid passage that allows the auxiliary pump to pass through the inside of the canned motor via the circulation pipe and circulate it to the line homo mixer. line homo mixer. (4) A heat exchanger is provided in the middle of the circulation pipe, and a relatively low-temperature liquid among the two or more liquids mixed and stirred by the line homomixer is passed through the heat exchanger as a cooling liquid for the heat exchanger. 4. The canned motor line homomixer according to claim 3, further comprising a liquid passageway for supplying the liquid to the line homomixer. (5) A mixing stirring blade attached to the rotating shaft of the canned motor is disposed in at least one of the front rotor chamber and the rear rotor chamber of the canned motor, and the stator can of the canned motor is turned into a mixing and stirring cylinder. A dual-purpose line homo mixer is configured in a liquid passage in the canned motor, and all of the two or more liquids mixed and stirred by the line homo mixer are supplied from one side of the canned motor to the line homo mixer. 2. The canned motor line homomixer according to claim 1, further comprising a liquid passageway through which the liquid passes through the canned motor while being mixed and stirred and is discharged from the other side of the canned motor.