KR101280998B1 - Bidirectional pump with external motor - Google Patents

Abstract

The present invention relates to a motor-type bidirectional pump applied to an anti-healing device for preventing the inclination or shaking of the ship of the present invention.
The motor-type external bidirectional pump may include a motor unit having a motor and a motor base; and a gear box unit having a drive gear coupled to the motor shaft and a driven gear coupled to the drive gear to transfer the driving force of the motor to the impeller rotational driving force. And, a pump unit in which the gear box is installed therein to transfer the fluid to the left tank or the right tank of the anti-healing system by rotating the impeller by receiving the rotational force of the gear box unit. It includes an extension that is expanded to increase the amount of lubricant to increase the lubrication or cooling effect of the drive gear and the driven gear therein,
It reduces the wear of the drive gear and the driven gear mounted inside the gearbox and improves the cooling performance against the heat generated during driving.

Description

External bidirectional pump for motors {BIDIRECTIONAL PUMP WITH EXTERNAL MOTOR}

The present invention relates to a motor-driven bidirectional pump applied to a fluid transfer device requiring bidirectional fluid transfer such as an anti-healing device for preventing the inclination or shaking of the ship.

In general, the ship is provided with an anti-heeling device (automatically balanced) in order to prevent the ship from tilting or shaking by waves.

1 is a plan view of an anti-healing system 400 of the prior art.

As shown in Figure 1, a general anti-healing device is composed of the anti-healing tank consisting of the left tank (1200A) and the right tank (1100A) near the center of the ship using the ballast pump (P1, P2) of the ship engine room. The ballast water in the anti heeling tank was exchanged with each other to maintain balance.

In this case, since the ballast pumps P1 and P2 of the engine room are constituted by unidirectional pumps, the left tank 1200A in which the separated pipes are arranged in the center of the ship after the pipes are independently connected to each other by separate pipes in the engine room E1. ) And the pipe connected to the right tank (1100A) and a plurality of valves (V1, V2, V3 ...).

In the conventional anti-healing system 400 connected as described above, when the ballast water of the left tank 1200A is transferred to the right tank 1100A, a plurality of valves V1, V2, V3. The pipe is connected to the pipe connected to the left tank (1200A) and the right tank (1100A) to transfer the number of ballasts from the left tank (1200A) to the right tank (1100A). On the contrary, when the ballast water of the right tank 1100A is transferred to the left tank 1200A, a plurality of valves (V1, V2, V3 ...) are provided with the pipe on which the pump P2 is mounted, and the left tank 1200A and the right tank. By connecting the pipe connected to (1100A) to transfer the ballast number from the right tank (1100A) to the left tank (1200A) to perform an anti-healing function.

Therefore, in the case of the anti-healing system 400 to which the conventional unidirectional pump is applied, the system is complicated by many valves and long pipes, and the reaction time is slow. In order to overcome the disadvantages of the anti-healing device of the prior art, by applying a bi-directional pump between the pipes directly connected to the anti-heeling tank (anti heeling tank) on the left and right side of the ship performs a quick balance maintenance, simplifying the system structure I was.

To this end, the external motor bidirectional pump P 'is configured to transfer fluid in both directions, and FIG. 2 is a cross-sectional view of the external motor bidirectional pump P' having a bidirectional fluid transfer function of the prior art.

As shown in FIG. 2, the pump P ′ is perpendicular to an axis of the bevel gear 2230 and the driving motor 2240 installed inside the case unit 2210 in which the driving motor 2240 and the discharge groove 2260 are formed. The driven gear 2120, which is axially coupled to the driven gear main shaft 2140 of the bevel gear 2230 projecting out of the case unit 2210, rotates in the opposite direction in engagement with the electric gear 2120 ( 2130, the auxiliary gear 2130 is configured to include an auxiliary shaft 2150, a metal bearing 2300, a plurality of seal (seal) member is axially coupled.

The pump P 'having the above-described configuration is configured to change the rotational direction of the electric gear 2120 and the driven gear 2130 according to the rotational direction of the drive motor 2240 so that the fluid can be selectively transported in both directions. .

 However, the above-described conventional pump P 'has a problem that energy loss may occur because the flow direction of the main shaft 2140 of the bevel gear 2230 and the fluid do not coincide, and thus the efficiency of the pump action is reduced. Can have

In addition, the above-described conventional pump P 'is effective in pumping such as problems of overheating of the bevel gear 2230, oil leakage in sealing, and lowering the flow velocity of the fluid flowing inside the pipe by the enclosure in which the bevel gear is mounted. There are problems that deteriorate.

Therefore, the present invention is to solve the above-mentioned problems of the prior art, by allowing the flow of the fluid to have the same direction as the main shaft 2140 of the bevel gear 2230 to improve the pump operation efficiency It is an object to provide an external bidirectional pump.

It is another object of the present invention to provide a motor-type bidirectional pump having an improved structure that minimizes the flow rate drop caused by the bevel gear box installed inside the pipe.

Another object of the present invention is to provide a motor-type bidirectional pump having an improved cooling structure for improving the cooling performance of heat generated inside the bevel gear 2230.

Motor external two-way pump of the present invention for achieving the above object, the motor unit having a motor and a motor base; coupled to the drive gear and the drive gear coupled to the motor shaft to transfer the driving force of the motor to the impeller rotation drive force A gear box having a driven gear; and a pump unit having the gear box installed therein to transfer the fluid to the left tank or the right tank of the anti-healing system by rotating the impeller under the rotational force of the gear box. It is configured to include, wherein the gearbox portion is characterized in that it comprises an extension that is extended to increase the amount of lubricating oil to increase the lubrication or cooling effect of the drive gear and the driven gear therein.

The gear box may be formed such that the cross-section cut horizontally in the longitudinal direction of the pump part has a narrow width at both ends in the horizontal direction and a wide center in order to reduce the resistance to the fluid transferred from the pump part. . The extension increases the amount of lubricating oil contained so as to maintain the viscosity of the lubricating oil for a long time and to easily cool the internal heat.

The cross section of the gearbox is configured to have a streamline shape including a rhombus shape or an elliptical shape.

The pump unit may include one or more guides extending from the gearbox and the outer circumferential surface of the pump unit to the inner circumferential surface of the pump unit.

The guide may include a center guide extending from the bottom of the gear box to the inner bottom of the pump case forming the pump part, a horizontal guide extending from the side of the gear box to both inner walls of the pump case, or a predetermined angle interval from the outer circumferential surface of the gear box. It may be configured to include one or more guides of the plurality of radial guides extending to the inner wall of the pump case.

The guide including at least one of the center guide, the horizontal guard or the radial guide may have a structure in which both sides located in the transport direction of the fluid are rounded in a flat structure.

In addition, the guide including the center guide, the horizontal guide or the radial guide may have a thick thickness at the center of the center line along the moving direction of the seawater to be transported in order to reduce the friction force, the thickness of both sides may have a thin streamlined structure. .

The motor unit includes: a jaw coupling for axially coupling the motor shaft and the drive gear shaft of the motor; a protection ring inserted into an outer circumference of the drive gear shaft to reduce wear of the drive gear shaft; and the drive gear A bearing rotatably supporting the shaft; and a lock nut coupled to the bearing housing and coupled to the drive gear shaft to fix the bearing; And the like.

The gear box includes an impeller shaft tube extending in a horizontal direction toward the impeller side of the pump unit, and a seal spacer coupled to an outer circumference of the impeller shaft tube; And a mechanical seal which seals between the mechanical seal and the seal spacer. A fluid is geared between the mechanical seal and the oil seal. A drain hole may be formed to confirm leakage into the box.

The seal spacer may be formed with a drawing groove on the outer periphery of the impeller side in order to facilitate the withdrawal from the impeller shaft.

A leak sensor may be installed at the end of the drain hole to detect leaks.

The motor-driven bidirectional pump of the present invention having the above-described configuration provides an effect of remarkably improving the lubrication characteristics and cooling characteristics inside the motor by forming an extension so as to increase the amount of lubricating oil secured in the gearbox.

In addition, the external motor bidirectional pump of the present invention, by having a drain hole and a leak sensor can quickly check the leakage or leakage inside the gearbox, it is possible to take a quick action before the wear or damage of the gears in the gearbox Provide the effect of doing so.

In addition, the gearbox part of the present invention has the streamlined structure to minimize the flow resistance of the fluid transported from the inside provides an effect of improving the transfer efficiency of the fluid.

In addition, the present invention provides an effect of further improving the transfer efficiency of the fluid by preventing vortex flow from occurring in the fluid to be conveyed by forming a streamlined guide between the gearbox and the pump portion.

In addition, by disposing the pressure sensor in the pump unit of the present invention to maintain the impeller far away, it minimizes the effect of the eddy current caused by the impeller, thereby providing an effect that can accurately measure the pressure of the fluid (water) to be transported do.

In addition, the present invention provides the effect of significantly extending the life of the gear by applying a protective ring to prevent the shaft wear of the drive gear and the driven gear.

1 is a plan view of an anti-healing system 400 of the prior art,
2 is a cross-sectional view of a vertical motor external bidirectional pump P having a bidirectional fluid transfer function of the prior art;
3 is a partial cross-sectional view of the motor-driven bidirectional pump P according to the embodiment of the present invention;
4 is an enlarged view of a portion A of FIG. 3;
5 is an enlarged view of a portion B of FIG. 3;
6 is an internal rear view of the pump unit 300 showing the rear surface and the center guide L of the gear box E of FIG.
FIG. 7 is a partial cross-sectional view of the external motor type bidirectional pump P showing the rear surface of the gear box E in which the horizontal guide HG is installed and the cross section of the horizontal guide HG.
8 is an internal rear view of the motor external bidirectional pump P having a radial guide RG disposed radially;
9 is a view showing the anti-healing device 1000 is equipped with a motor-driven bi-directional pump (P) of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.

3 is a partial cross-sectional view of the external motor type bidirectional pump P according to an embodiment of the present invention, FIG. 4 is an enlarged view of portion A of FIG. 3, and FIG. 5 is an enlarged view of portion B of FIG. 3.

As shown in FIG. 3, the motor-type bidirectional pump P has a vertical motor type 100, a gearbox part 200, and a gearbox part 200 protruding and installed in the vertical direction of the upper part of the pump part 300. ) Is configured to include a pump unit 300 is mounted on the inside and coupled to the external pipeline.

The motor unit 100 includes a motor 1 and a motor shaft 1a that are vertically installed. One side of the motor base 2 is closed by an oil check cover 4 that can be opened and closed by a butterfly bolt 3 to form an observation hole 2a for observing the state of the lubricating oil. On the bottom surface of the motor base 2, a motor base drive gear shaft hole 2b is formed in which the drive gear shaft 15a is inserted into the motor base 2 and then coupled to the motor shaft 1a.

The motor base 2 of the above configuration is coupled to the upper surface of the gear box (E) that is built in the pump case 5 is coupled to the outer periphery of the motor shaft (1a) and the motor shaft (1a) motor shaft (1a) Including the protection ring (R) and the drive gear 15 to protect the components that are configured therein, and the lubricant to smooth the rotation of the motor shaft (1a) and the drive gear (15) is filled.

3 and 4, the gear box unit 200 is integrally formed inside the pump case 5 forming the pump unit 300, the upper portion of the gear box driving gear shaft ball 210b is formed, One side (the right side in the drawing) is configured in a box shape in which an impeller shaft tube 220 to which the impeller shaft 12 is coupled in the horizontal direction is formed. In the gearbox E having the above configuration, the drive gear 15 axially coupled to the drive gear shaft 15a and the driven gear 14 axially coupled to the impeller shaft 12 are engaged with each other in a state where lubricant is filled therein. It is installed inside in a state.

The impeller shaft 12 is coupled to the driven gear 14 and configured to mount the impeller 6 on the opposite side.

The pump unit 300 is a tubular shape in which both sides are open, and an impeller axially coupled to the pump case 5 including the gear box E and the impeller shaft 12 protruding to one side of the gear box E. (6) is built in, and the pipe which conveys a fluid for anti-healing is comprised so that it may respectively connect to the opening part of both sides.

3 and 4, the drive gear shaft 15a is inserted into the motor base 2 through the gearbox driving gear shaft hole 210b and the motor base driving gear shaft hole 2b of the gearbox E. It is then axially coupled with the motor shaft 1a by jaw coupling. The drive gear shaft 15a of the above configuration has a bearing 16 mounted on an outer circumference thereof and is fixed to the upper end of the bearing 16 so that the bearing 16 is not detached by the drive gear shaft lock nut N, so that the gear box drive gear It is rotatably coupled to the shaft hole (210b). At this time, the spaced color 24 between the bearing 16 is inserted into the outer peripheral surface of the drive gear shaft 15a to move the bearing 16 and the drive gear shaft 15a up and down to adjust the backlash of the gear.

An oil seal 19 for sealing is installed between the gearbox driving gear shaft hole 210b and the driving gear shaft 15a.

3 and 5, the gear box (E) has a built-in driven gear 14 and the impeller shaft 12 axially coupled to the driven gear 14 is coupled vertically to the drive gear 15, The inside of the gearbox E is also filled with lubricating oil.

In this configuration, the drive gear 15 and the driven gear 14 are formed of a helical or spiral gear type bevel gear.

The impeller shaft 12 coupled to the driven gear 14 is axially coupled to a bearing housing 13 including a bearing 16. The seal spacer 17 is detachably coupled to the impeller shaft 12 via the O-ring O on the right side of the bearing housing 13 (the direction is based on FIG. 3). At the outer circumference of the seal spacer 17, an oil seal H and a mechanical seal 11 are rotatably coupled to each other. On the outer circumferential surface of the end portion of the seal spacer 17 on the impeller 6 side, a pull-out groove R recessed to form the seal spacer 17 can be easily separated from the impeller shaft 12. The drawing groove R may be selectively formed to be recessed over a part of the outer circumference of the seal spacer 17 or the entire outer circumference.

When the seal spacer 17 needs to be replaced due to the wear of the seal spacer 17 and the mechanical seal 11, the ejector groove R of the seal spacer 17 is removed after the impeller 6 is removed. By using only to separate the seal spacer 17 and the mechanical seal 11 and to recombine it to facilitate the replacement of the seal spacer 17 or the mechanical seal (11).

The impeller 6 is axially coupled by the key 9 and the impeller lock nut 8 to an end protruding toward the pump case 5 of the impeller shaft 12.

As shown in FIG. 5, the impeller shaft tube 220 has a drain hole G communicating with the outside of the pump case 5 between the oil seal H and the mechanical seal 11. Referring back to Figure 3 through the drain hole (G) to determine the leakage of the mechanical seal 11 and the leakage of the oil seal (H) at the end in communication with the outside of the pump case (5) of the drain hole (G) A leak sensor S is installed for detecting whether the fluid is discharged.

The motor-type bidirectional pump P having the above-described configuration can accommodate a large amount of lubricating oil for lubrication and cooling of the drive gear 15 and the driven gear 14 inside the gearbox E, and the pump case ( 5) has a structural feature to facilitate the transfer of the fluid to be transferred into the interior.

Among these features, one configuration for smoothly transferring the fluid transferred into the pump case 5 is the shaft of the pump case 5 between the bottom of the gearbox E and the inner bottom of the pump case 5. The width viewed from the direction is narrow, the width viewed from the side of the pump case is the center guide (L) is formed wide.

In addition, the motor external two-way pump (P) has an additional configuration to improve the structure of the gear box (E) to ensure a lot of lubricating oil, and do not interfere with the fluid transported inside the pump case (5), FIG. This will be described with reference to 3, 6, 7 and 8.

6 is an internal rear view of the pump unit 300 showing the rear surface and the center guide L of the gear box E of FIG. 3, and FIG. 7 is a rear surface of the gear box E having the horizontal guide HG installed therein. Fig. 8 is a partial cross-sectional view of the motor external bidirectional pump P showing the cross section of the horizontal guide HG, and Fig. 8 is an internal rear view of the motor external bidirectional pump P with the radial guides RG disposed radially.

As shown in FIG. 3, the gearbox E has an expansion portion C to increase the amount of lubricating oil filled for lubrication and cooling of the drive gear 15 and the driven gear 14 which are engaged with each other and rotated therein. It has a structure to form a. By the configuration of the expansion unit (C), the motor external bidirectional pump (P) has a large amount of lubricating oil as compared with the conventional motor pump, so that the lubrication performance and the internal drive gear 15 and the driven gear 14 By significantly improving the cooling performance of the), it prevents the wear and breakage of the drive gear 15 and the driven gear 14, thereby extending the life.

At both ends of the pump case 5 as shown in FIG. 3, a pressure gauge hole D capable of installing a pressure gauge is formed. In the case of FIG. 3, the pressure gauge hole D further forms a region having a predetermined thickness in the flange of the pump case 5 to further penetrate the distance from the impeller to minimize the influence of the vortex caused by the impeller. . In the case of Figure 3, the pressure gauge hole (D) is also formed in the flange of the pump case located on the impeller side, but is cut out in the cross-section is not shown in the figure. This makes it possible to accurately measure the pressure of the conveyed fluid.

Next, the gear box (E) is a streamlined structure of the gear box (E) for minimizing the disturbance of the flow of fluid transported inside the pump case (5) and the center guide (L) of FIG. It has a structure such as the horizontal guide (HG) or the radial guide (RG) of FIG.

In order to further reduce the frictional resistance of the fluid, the gearbox E is cut along the lines VV of FIGS. 6 and 7, and the width S1 of both end portions in the longitudinal direction of the pump case 5 as shown in the cross section viewed from the top. Is narrow, the width (S2) of the central portion may have a streamlined structure such as rhombus or oval wide.

In order to minimize the disturbance of the flow of the fluid flowing inside the pump case (5), the center guide (L), horizontal guide ( HG) or a guide including at least one of the radial guide (RG) is formed.

First, the center guide (L) is formed in a plate shape extending from the bottom of the gear box (E) to the bottom of the pump case (5), as shown in FIGS.

As shown in FIG. 7, the horizontal guide HG is formed in a plate shape extending from both sides of the gear box E to both side walls of the pump case 5.

As shown in FIG. 8, the radial guide RG is formed in the form of a plate extending radially even at a predetermined angular interval from the outer circumferential surface of the gear box E.

The center guide L, the horizontal guide HG, or the radial guide RG is based on a structure in which both sides are rounded on a flat plate structure.

In addition, the center guide, the horizontal guide and the radial guide have a thick thickness at the center of the center line along the direction of movement of the seawater to reduce the frictional force, and both sides have a thin streamlined structure.

The number of center guides L, horizontal guides HG, or radial guides RG may vary as necessary.

Guides including one or more of the center guide (L), the horizontal guide (HG) or the radial guide (RG) having the above-described characteristics, such as vortex formation by the gear box (E) at the bottom of the pump case (5) It removes the fluid motion component acting as a friction in the conveyance, and smoothly conveys the fluid by guiding the fluid in the conveying direction.

9 is a view showing the anti-healing device 1000 is equipped with a motor-driven bi-directional pump (P) of the present invention.

As shown in FIG. 9, the anti-healing device 1000 is used for seawater exchange between the left tank 1200 and the right tank 1100, the left tank 1200, and the right tank 1100 formed on both sides of the vessel 1001. The seawater stored in the pipe 4 and the left tank 1200 or the right tank 1100 in which the valve V is formed is transferred to the right tank 1100 or the left tank 1200 as the ship 1001 is inclined. It is configured to include a motor external bidirectional pump (P) installed in the pipe (4).

The motor-type external bidirectional pump P transfers the seawater of the tank located in the inclined direction of the vessel 1001 to the tank in the opposite direction to prevent the vessel 1001 from tilting or shaking.

In addition, by applying a bidirectional pump, in the case of a one-way motor, the left tank 1200 does not have a separate pipe for the inflow of seawater into the left tank 1200 and the right tank 1100. Since the seawater exchange between the and the right tank 1100 is carried out compared to the anti-healing device of the prior art (see FIG. 1), the piping structure is significantly simplified.

P: bidirectional pump, 100: motor portion, 200: gearbox portion, 300: pump portion
1: motor, 1a: motor shaft, 2: motor base, 2a: observation hole, 6: impeller
E: gearbox, C: extension, D: pressure gauge hole
11: mechanical seal,
12: impeller shaft, 14: driven gear, 15: drive gear, 15a: drive gear shaft
G: Drain hole, S: Leakage sensor, S1: Narrow, width of the gearbox
S2: wide width of the gearbox

Claims (11)

A motor unit having a motor and a motor base;
A gearbox having a drive gear coupled to the motor shaft and a driven gear coupled to the drive gear to transfer the driving force of the motor to the impeller rotational driving force;
And a pump unit in which the gearbox is installed therein to transfer the fluid to the left tank or the right tank of the anti-healing system by rotating the impeller by receiving the rotational force of the gearbox.
Wherein the gear box portion is a motor-driven two-way pump, characterized in that it comprises an extension to increase the amount of lubricating oil to increase the lubrication or cooling effect of the drive gear and the driven gear therein.
The method according to claim 1, wherein the gearbox,
In order to reduce the resistance to the fluid transported in the pump portion, the cross section cut horizontally along the longitudinal direction of the pump portion is characterized in that the motor is characterized in that both ends of the horizontal direction is formed to have a narrow width and a central portion having a wide width Bidirectional pump.
The method according to claim 2,
Cross section of the gearbox is a motor-type bidirectional pump characterized in that it has a shape of any one of a rhombus shape or an elliptical shape.
The method of claim 1, wherein the pump unit,
Motor external bidirectional pump, characterized in that further comprising a guide extending from the outer circumferential surface of the gear box to the inner surface of the pump case to form a pump unit in the pump unit.
The method according to claim 4, The guide,
A center guide extending from the bottom of the gearbox to the inner bottom of the pump case forming the pump part;
External motor, characterized in that the horizontal guide extending from the side of the gearbox to the inner both side walls of the pump case;
A plurality of radial guides having an angular spacing on the outer circumferential surface of the gearbox and extending to the inner wall of the pump case; External two-way pump characterized in that it comprises one or more of.
The guide according to claim 4 or 5, wherein the guide,
Motor-type bidirectional pump, characterized in that the flat plate structure has a structure in which both ends are rounded.
The guide according to claim 4 or 5, wherein the guide,
A motor-driven bidirectional pump, characterized in that the cross section cut perpendicular to the longitudinal direction of the pump portion has a streamlined structure with a narrow thickness at both end portions in the transverse direction (in the fluid transfer direction) and a large central thickness.
The method according to claim 1, wherein the motor unit,
Jaw coupling for axially coupling the motor shaft and the drive gear shaft of the motor;
A protection ring inserted into an outer circumference of the drive gear shaft to reduce wear of the drive gear shaft;
A bearing for rotatably supporting the drive gear shaft;
And a lock nut coupled to a bearing housing and coupled to a drive gear shaft to fix the bearing.
The method according to claim 1, wherein the gearbox,
An impeller shaft tube extending in a horizontal direction toward the impeller side of the pump unit;
Seal spacers coupled to the outer periphery of the impeller shaft tube; And,
A mechanical seal coupled to an outer circumference of the seal spacer to rotatably support the impeller shaft; and
And an oil seal for sealing between the mechanical seal and the seal spacer.
The external external two-way pump is characterized in that the drain hole is formed between the mechanical seal and the oil seal to confirm that the fluid leaks into the gearbox.
The method according to claim 9, The seal spacer,
A motor-driven bidirectional pump, characterized in that withdrawal grooves are formed on the outer periphery of the impeller side to facilitate withdrawal from the impeller shaft.
The method according to claim 9,
End of the drain hole is a motor external two-way pump, characterized in that the leakage sensor is installed for the detection of leakage water.

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