KR100917803B1 - Motor used in pump and fabrication method for rotary part in the same - Google Patents

Abstract

A motor for a pump and a manufacturing method of a rotation part thereof are provided to reduce friction between a rotary shaft and a supporting member of an opening part or a supporting member of a closing part by forming the supporting member with a ceramic material. A hollow(110) is formed in the center of a stator(100). A rotor housing(200) is inserted to the hollow of the stator. One end of the rotor housing is opened. The other end of the rotor housing is closed. A rotor(310) is installed inside the rotor housing. A rotary shaft(320) is fixed to the stator. A supporting member(420) of a closing part is fixed to a closed end part of the rotor housing. A supporting member(410) of an opening part is fixed to an opened end part of the rotor housing. Axial holes are formed in the center of the supporting member of the closing part and the supporting member of the opening part. A fixing protrusion is formed in an internal diameter of the rotor housing.

Description

Motor used in pump and fabrication method for rotary part in the same}

The present invention relates to a motor for a pump.

In general, a pump is a machine that transports a fluid through a pipe by using a pressure action. A pump is used to transport a liquid or gas fluid through a pipe by a pressure action, or a fluid in a low pressure vessel. It is a machine for feeding pressure into a high pressure vessel.

The pump as described above has been a major problem, such as drainage of groundwater in mines, irrigation of agricultural water, and various pumping devices have been devised. Today, pumps are usually used where fluids are used, from rural areas to mines, civil engineering works, factories and homes. In addition, the pump is widely used not only for water but also for transporting petroleum, various chemicals, or special fluids such as pulp, viscose, and sludge.

In this way, a motor pump using a motor in the pump for delivering the fluid is used to pressurize and discharge the fluid introduced by the operation of the pressure blade by rotating the rotor inside by the electromotive force of the electromagnet is applied power.

As described above, an example used for a hot water electric floor using a motor pump to be used is disclosed in Patent No. 840201 (hereinafter referred to as 'prior invention'). 1 shows a diagram 4 of the preceding invention.

As shown in Figure 1, the motor of the preceding invention is inserted into the rotating case 131 in the hollow of the electromagnet 138, the shaft support 135 is located at both ends of the rotating case, the rotating shaft 136 is the shaft support It is fitted to the 135 and is rotated by being installed in the rotating case 131. (The remaining reference numerals refer to the specification of the preceding invention.) The shaft support 135 is bonded and fixed to the rotating case 131.

However, in the case of the preceding invention, the hollow of the shaft support 135 for supporting the rotating shaft 136 is exactly the center and the concentric circles so that the rotating shaft 136 rotates smoothly. Strictly speaking, in FIG. 2, the overlapping portions of the hollows 135a and 135b of both shaft supports 135 have a larger rotation axis 132 beam so that the rotation shaft 136 rotates smoothly. Since the tolerance between the hollow and the rotary shaft 132 is not so large, it is difficult to manufacture it accurately, and substantially the shaft support 135 in a position where the rotary shaft 136 is smoothly rotated by rotating the shaft support 135 in the assembling step. It is implemented by fixing.

However, in the case of the preceding invention, the bond between the shaft support 135 and the rotary case 131 is inferior in adhesion force over time. In particular, in the situation of continuous contact with hot water, the adhesive force of the adhesive is easily dropped, the shaft support 135 is often fixed to the rotation case 131, the rotation occurs frequently. As a result, there was a problem that the rotating shaft 136 does not rotate smoothly.

The present invention has been made to solve the above problems, and an object thereof is to provide a pump motor and a rotating part manufacturing method of the pump motor that can exhibit a consistent performance even in a long-term use and poor environment.

The present invention to solve the above problems, the coil is wound and the stator is hollow formed in the center; A rotor housing fitted to the hollow, the rotor housing having one end opened and the other end formed in a closed cup shape; A rotor installed in the rotor housing; A rotating shaft fixed to the rotor; A sealing part supporting member which is fixed to the other end of the rotor housing and is formed with a shaft hole in which a rotating shaft is inserted in the center thereof to rotate; And an opening part supporting member fixed to the open end of the rotor housing at one end thereof, the opening part supporting member having a shaft hole formed therein for rotating the shaft in the center thereof, wherein the sealing part supporting member is coupled to the inner diameter of the rotor housing. And an inner diameter of the rotor housing to which the opening part supporting member is coupled, wherein a fixing protrusion for fixing the sealing part supporting member and the opening part supporting member is formed to protrude inward.

Here, the other end of the rotor housing is sealed, the sealing portion supporting member coupling portion having a reduced diameter is formed, the sealing member supporting member is coupled to the sealing portion supporting member coupling portion.

In addition, the sealing member is preferably formed of a ceramic material.

In addition, the opening support member is preferably formed of a ceramic material.

Meanwhile, a portion where the shaft hole of the opening support member is formed may be formed of a ceramic material, and a portion contacting the rotor housing may be formed of a material softer than the ceramic.

Here, the spacer formed of a ceramic material is preferably fitted to the shaft between the opening support member and the rotor.

The spacer may include a rotor contact part formed of a soft material having a high frictional force in a direction facing the rotor, and a support member contact part formed of a ceramic material in a direction facing the opening part supporting member.

In addition, a portion where the shaft hole of the seal supporting member is formed is formed of a ceramic material, and a portion in contact with the rotor housing is formed of a material softer than the ceramic.

On the other hand, as another field of the present invention, the one end is opened and the other end is closed in the other end of the rotor housing formed in a closed cup shape, the step of placing a seal support member formed with a shaft hole in the center; Inserting one end of the rotating shaft to which the rotor is fixed in the shaft hole; Fitting an opening part supporting member having a shaft hole in the center thereof to the open end and simultaneously fitting the shaft hole of the opening part supporting member to the other end of the rotating shaft; Rotating the opening support member to find a position where the rotational resistance of the rotary shaft is small; And fixing the sealing part supporting member and the opening part supporting member to the housing by press-ining a plurality of points of the outer diameter of the housing.

According to the problem solving means of the present invention as described above it can be expected a variety of effects including the following matters. However, the present invention is not achieved by exerting all of the following effects.

First, the pump motor of the present invention can not only smoothly rotate the rotating shaft, but also maintains a firm coupling of the support member and the housing even when used in a poor environment such as hot water for a long time, so that the failure of the motor does not occur .

In addition, by forming the fixing projections on the coupling portion of the sealing member supporting member having a smaller diameter than the housing main body, there is no influence on the housing main body to be coupled to the stator, it is possible to facilitate the coupling of the rotor housing and the stator.

In addition, since the sealing member supporting member and the opening member supporting member are made of a ceramic material, not only the wear resistance is good but also the sliding friction with the rotating shaft is reduced, and the frictional force is reduced.

In addition, by forming the outer diameter portion of the opening support member and the sealing support member made of a soft material, it is possible to further increase the coupling force between the opening support member and the sealing support member and the housing.

By providing the spacer, the friction force between the opening support member and the rotor can be reduced.

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

However, in describing the present invention, a detailed description of known functions or configurations will be omitted in order not to disturb the gist of the present invention.

Figure 3 is an exploded perspective view showing a pump motor of an embodiment of the present invention, Figure 4 is a cross-sectional view taken along the cutting line IV-IV of Figure 3, Figure 5 is a cross-sectional view along the cutting line V-V.

Pump motor of an embodiment of the present invention is the coil is wound and consists of a stator 100, the hollow 110 is formed in the center, and a rotating part of the motor coupled to the stator 100.

Rotor portion of the motor is fitted to the hollow 110, one end is open and the other end is formed in the rotor housing 200 is formed in a closed cup shape, the rotor 310 installed in the rotor housing 200, and the A sealing member supporting member 420 having a rotating shaft 320 fixed to the electron 310, a shaft hole fixed at the other end of the rotor housing 200, and formed with a shaft hole in which the rotating shaft is inserted into the center thereof; An open end support member 410 is fixed to the one end of the open end of the rotor housing 200 and has a shaft hole 411 formed therein to rotate by inserting the rotary shaft in the center thereof.

Since the stator 100 is the same as the preceding invention, a detailed description thereof will be omitted.

The rotor housing 200 has an inner diameter (shown in FIG. 4) of the rotor housing to which the seal supporting member 420 is coupled and an inner diameter of the rotor housing to which the opening supporting member 410 is coupled ( 5, fixing protrusions 211 and 221 for fixing the sealing part supporting member 420 and the opening part supporting member 410 are formed to protrude inward.

In detail, the rotor housing 200 is made of metal and is generally formed by a deep drawing method. The opening part supporting member 410 is formed by forming fixing protrusions 211 and 221 for press-fitting the outer diameter of the opening part supporting member 410 and the sealing part supporting member 420 internally formed in the housing 200 formed as described above. And the sealing member supporting member 420 may be firmly fixed. Therefore, there is no fear that the opening support member 410 and the sealing support member 420 will loosen with respect to the rotor housing 200 even when organs are exposed to hot water.

In addition, the plurality of fixing projections are formed to be symmetrical to each of the center of the sealing portion supporting member and the opening portion supporting member. In this manner, when the fixing protrusions 211 and 221 are formed, the amount of eccentricity of the shaft holes 411 and 421 can be easily adjusted by adjusting the protrusion amount of the fixing protrusions 211 and 221.

The rotor housing 200 includes a rotor housing main body 210 and a seal support member coupling part 220 having a reduced diameter at the other end of the rotor housing. The sealing part supporting member 420 is fitted to the sealing part supporting member coupling part 220 to be coupled.

When pressure is applied to the outer diameter of the rotor housing 200 to form the fixing protrusion 221 for fixing the sealing part supporting member 420, minute deformation occurs in the outer diameter of the housing 200. In addition, in order to increase the efficiency of the motor, the gap between the coil of the stator 100 and the rotor 310 should be minimized. As a result, the tolerance of the outer diameter of the rotor housing main body 210 and the inner diameter of the stator 100 hollow 110 is very small. Therefore, the housing 200 in which the micro deformations are generated in the outer diameter does not become coupled to the hollow 110 of the stator 100. Therefore, as shown in the present invention, by forming the fixing projections 221 in the sealing portion supporting member coupling portion 220 having a smaller diameter than the housing main body 210, there is no effect on the housing main body 210 to be coupled to the stator 100 The coupling between the rotor housing and the stator can be facilitated.

Since the site where the fixing protrusion 211 is formed to fix the opening supporting member 410 is not inserted into the hollow 110 of the stator, it does not interfere with the coupling of the rotor housing 200 and the stator 100. Do not.

The rotor 310 has a permanent magnet therein, and generates a rotational force by the current flowing through the coil of the stator. The outside of the rotor is packed with metal material. The rotating shaft 320 is made of copper or stainless steel, but is formed of a ceramic material due to its large resistance and easily deteriorated. Since the rotating shaft 320 is formed of a ceramic material, the wear resistance is good, durability can be increased, and heat generation can be reduced.

Since the sealing member and the opening member support sliding friction directly with the rotating shaft 320, the sealing member and the opening supporting member are preferably made of a ceramic material to reduce wear resistance and frictional force.

6 is a perspective view of the opening support member of FIG. 3.

As shown, the opening support member 410 is formed in a disk shape and the shaft shaft 411 is formed in the center to rotate the rotation shaft 320 is inserted, the fluid inlet hole 414 so that the circulating fluid can be introduced ) Is formed by passing through several. In addition, friction reducing ribs 412 and 413 for reducing friction when contacting the rotor 310 protrude toward the rotor 310.

The shape of the seal supporting member may be the same as the shape of the opening supporting member.

7 is a modification of the opening support member.

In the opening supporting member 1410 illustrated in FIG. 7, a portion 1412 (hereinafter, 'inner diameter portion') in which the shaft hole 1411 of the opening supporting member is formed is formed of a ceramic material and is in contact with the rotor housing ( 1413, hereinafter 'the outer diameter portion') is formed of a material softer than the ceramic. That is, in the case of ceramics, since brittleness and hardness are strong, as in the first embodiment, when the protrusion exerts pressure on the outer diameter of the opening support member of ceramic material, there is a risk of being broken and fixed to the housing 200. It may be disadvantageous that the binding force is also weak. In order to solve this problem, the outer diameter portion 1413 contacting the protrusion is formed of a soft material such as plastic, and the inner diameter portion 1412 is preferably formed of a ceramic material to reduce friction with the rotating shaft. The method of manufacturing the same may use an insert injection method. Reference numeral 1414, which is not described, indicates a fluid inlet hole. The effect that can be obtained by the outer diameter portion 1413 being formed of a soft material is various besides. That is, when the motor is used in a hot environment, the thermal expansion rate of the rotor housing 200 and the ceramic material of the metal material is significantly different, there is a fear that the bonding force is weakened, the outer diameter portion 1413 is a soft material having a wide range of elastic deformation By forming this, such a problem can be solved.

Here, the soft material is not limited to plastic, and it is natural that a soft metal material may be used.

However, when the outer diameter portion 1413 is formed of a soft material such as plastic, when the surface contact with the rotor 310, the friction force is likely to increase. In order to prevent this, it is preferable that the spacer 1430 formed of a ceramic material is fitted into the rotation shaft between the opening support member 1410 and the rotor 310.

In particular, the spacer 1430 includes a rotor contact part 1431 formed of a soft material having high frictional force in a direction facing the rotor, and a support member contact part 1432 formed of a ceramic material in a direction facing the open part supporting member. It is more preferable to form.

In addition, a washer 1440 is further provided between the spacer 1430 and the opening support member 1410. The washer 1410 is used to prevent the spacer 1430 and the opening support member 1410 from sticking to each other when the motor is not used for a long time.

Like the opening supporting member 1410, the portion in which the shaft hole of the sealing supporting member is formed is formed of a ceramic material, and the part contacting the rotor housing is preferably formed of a material softer than the ceramic.

Hereinafter, the manufacturing method of the rotating part of the above-mentioned pump motor is described.

8 to 12 are cross-sectional views sequentially showing a manufacturing method of the rotating part of the pump motor.

The method of manufacturing the rotating part of the motor for a pump includes a sealing part supporting member 420 having a shaft hole 421 formed at the center of the rotor housing 200 at one end of which is opened and the other end of the rotor housing 200 formed in a closed cup shape. Positioning (FIG. 8), inserting one end 321 of the rotating shaft 320 to which the rotor 310 is fixed to the shaft hole (FIG. 9), and an opening having a shaft hole 411 formed at the center thereof. Fitting the support member 410 to the opened end and simultaneously fitting the shaft hole 411 of the opening support member to the other end 322 of the rotation shaft 320 (FIG. 10); Rotating (410) to find a position of the low rotational resistance of the rotating shaft 320 (Fig. 11), and a plurality of points of the outer diameter of the housing by pressing the seal member and the opening portion in the housing Fixing the support member (Fig. 12).

As described above, by manufacturing the rotating part of the motor using the manufacturing method of the rotating part of the motor, not only the rotating shaft 320 can be rotated smoothly, but also the support members 410 and 420 for a long time in a harsh environment such as hot water. ) And the housing are firmly held, so that a defect of the motor does not occur.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope described in the claims.

1 is an exploded perspective view showing FIG. 4 of the prior invention.

FIG. 2 is a conceptual diagram showing the relationship between the rotating shaft of FIG. 1 and the hollow of the shaft support; FIG.

Figure 3 is an exploded perspective view showing a motor for a pump of an embodiment of the present invention

4 is a cross-sectional view taken along the line IV-IV of FIG. 3.

5 is a cross-sectional view taken along the cutting line V-V.

6 is a perspective view of the opening support member of FIG.

7 is a perspective view showing a modification of the opening support member of FIG.

8 to 12 are cross-sectional views sequentially showing a manufacturing method of the rotating part of the pump motor.

** Description of the symbols for the main parts of the drawings **

100: stator 110: (stator) hollow

200: rotor housing 310: rotor

320: rotating shaft 420: sealing part support member

421: (sealing part support member) shaft hole 410: opening part support member

411: (opening support member) Shaft holes 221, 211: fixed protrusion

220: sealing part support member coupling portion 1430: spacer

1431: rotor contact 1432: support member contact

Claims (12)

A stator in which a coil is wound and a hollow is formed in the center; A rotor housing fitted to the hollow, the rotor housing having one end opened and the other end formed in a closed cup shape; A rotor installed in the rotor housing; A rotating shaft fixed to the rotor; A sealing part supporting member which is fixed to the other end of the rotor housing and is formed with a shaft hole in which a rotating shaft is inserted in the center thereof to rotate; And An opening part supporting member which is fixed to the one end of the open end of the rotor housing and has a shaft hole in which a rotating shaft is fitted to rotate; Including, Inner diameter of the rotor housing to which the seal support member is coupled and inner diameter of the rotor housing to which the opening support member is coupled are fixed projections for fixing the seal support member and the opening support member to the inside. Pump motor, characterized in that formed protruding. The method of claim 1, The other end of the rotor housing is sealed is formed with a sealing portion support member coupling portion is reduced in diameter, The sealing member support member is a pump motor, characterized in that coupled to the sealing portion supporting member coupling portion. The method according to claim 1 or 2, The sealing member support member is a pump motor, characterized in that formed of a ceramic material. The method according to claim 1 or 2, The opening support member is a pump motor, characterized in that formed of a ceramic material. The method of claim 4, wherein The sealing member support member is a pump motor, characterized in that formed of a ceramic material. The method according to claim 1 or 2, Wherein the shaft hole of the opening support member is formed of a ceramic material, the portion in contact with the rotor housing is a pump motor, characterized in that formed of a plastic or metal material softer than the ceramic material of the shaft hole is formed . The method of claim 6, And a spacer formed of a ceramic material is inserted into the shaft between the opening member and the rotor. The method of claim 7, wherein A washer installed between the spacer and the opening support member; Motor for a pump, characterized in that it further comprises. The method of claim 6, A spacer is fitted to the shaft between the opening support member and the rotor, The spacer may include a support member contact part formed of a ceramic material in a direction facing the opening part support member, and a rotor contact part formed of a plastic or metal material softer than a ceramic in the support member contact part in a direction facing the rotor. Pump motor comprising a. The method according to claim 1 or 2, Wherein the shaft hole of the sealing member supporting member is formed of a ceramic material, the portion in contact with the rotor housing is a motor for a pump, characterized in that formed of a softer plastic or metal material than the ceramic of the shaft hole is formed. The method according to claim 1 or 2, The fixing protrusion is a plurality of pump motor, characterized in that formed in each of the symmetrical to the center of the sealing member support member and the opening support member. Positioning a closed part supporting member having a shaft hole at a center thereof in the closed other end of the rotor housing having an open end and a closed end in a cup shape; Inserting one end of the rotating shaft to which the rotor is fixed in the shaft hole; Fitting an opening part supporting member having a shaft hole in the center thereof to the open end and simultaneously fitting the shaft hole of the opening part supporting member to the other end of the rotating shaft; Rotating the opening support member to find a position where the rotational resistance of the rotary shaft is small; And Fixing the sealing member supporting member and the opening supporting member to the housing by pressing a plurality of points of the outer diameter of the housing; Method for producing a rotating part of the motor for a pump comprising a.

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