WO2012017714A1 - モーター部品用保護スリーブ及びその製造方法 - Google Patents
モーター部品用保護スリーブ及びその製造方法 Download PDFInfo
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- WO2012017714A1 WO2012017714A1 PCT/JP2011/059355 JP2011059355W WO2012017714A1 WO 2012017714 A1 WO2012017714 A1 WO 2012017714A1 JP 2011059355 W JP2011059355 W JP 2011059355W WO 2012017714 A1 WO2012017714 A1 WO 2012017714A1
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- Prior art keywords
- protective sleeve
- sleeve
- yarn
- dtex
- motor
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- 230000001681 protective effect Effects 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims description 22
- 238000004519 manufacturing process Methods 0.000 title claims description 19
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- 239000000835 fiber Substances 0.000 claims description 24
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 11
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 11
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- 238000010292 electrical insulation Methods 0.000 abstract description 32
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Images
Classifications
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C1/00—Braid or lace, e.g. pillow-lace; Processes for the manufacture thereof
- D04C1/06—Braid or lace serving particular purposes
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C3/00—Braiding or lacing machines
- D04C3/40—Braiding or lacing machines for making tubular braids by circulating strand supplies around braiding centre at equal distances
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04C—BRAIDING OR MANUFACTURE OF LACE, INCLUDING BOBBIN-NET OR CARBONISED LACE; BRAIDING MACHINES; BRAID; LACE
- D04C3/00—Braiding or lacing machines
- D04C3/48—Auxiliary devices
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/12—Vehicles
Definitions
- the present invention relates to a protective sleeve for a motor component and a manufacturing method thereof.
- the present invention relates to a protective sleeve for motor parts having high fiber density and high electrical insulation and a method for manufacturing the same.
- motors for electric vehicles are required to have excellent high-temperature oil resistance as compared with general motors for vehicles.
- the electric vehicle motor must be present in the ATF (Automatic Transmission Fluid) for efficiency. Since ATF may become high temperature, the motor is required to have high temperature heat resistance in ATF.
- ATF Automatic Transmission Fluid
- Patent Document 1 a polyphenylene sulfide (PPS) fiber multifilament yarn as an electrically insulating material
- Patent Document 2 a polyphenylene sulfide (PPS) fiber multifilament yarn
- Patent Document 3 a cylindrical and flexible protective sleeve using a monofilament and a multifilament having high temperature oil resistance for electric vehicles has been proposed (see Patent Document 3).
- a protective sleeve is also proposed in which 4 to 50 yarns of filament yarn having a single yarn fineness of 30 to 100 dtex are formed into a cylindrical braid structure (see Patent Document 4).
- Patent Document 5 a protective sleeve has been proposed in which 4 to 30 filament yarns having a single yarn fineness of 19 to 88 dtex are formed into a cylindrical braid structure
- Patent Document 2 a sleeve using a monofilament is proposed. In this case, the sleeve has a cylindrical shape. However, the monofilament alone has a problem that the fiber structure is thick and the assembled structure is rough and there is a gap, so that the electrical insulation is lowered. In Patent Document 3, the present applicant proposed a combination of monofilament and multifilament.
- Patent Documents 4 and 5 propose braids that hold a cylindrical shape using multifilaments having a large single yarn fineness.
- the present invention has a high partial discharge characteristic, that is, electric insulation performance, and a motor having good electric insulation even if the process of cleaning the raw yarn oil applied to the filament is omitted.
- a protective sleeve for a component and a method for manufacturing the same are provided.
- the protective sleeve for motor parts of the present invention is a protective sleeve for motor parts in which multifilament yarns made of synthetic fibers are assembled into a cylindrical braid of at least 24 beats.
- the multifilament yarn has a single yarn fineness of 15 dtex or more and 30 dtex.
- the total yarn fineness of one braid unit of the braid is in the range of 800 to 1500 dtex.
- the manufacturing method of the protective sleeve for motor parts according to the present invention comprises a multifilament yarn having a single yarn fineness of 15 dtex or more and less than 30 dtex and having a total yarn fineness of 800 to 1500 dtex in a single braid unit. While assembling, a cylindrical shape is obtained by assembling along the outer periphery of a round or polygonal rod with a rounded tip substantially equivalent to the inner diameter of the braid while pushing the head up and down vertically from the center. The sleeve is obtained.
- the protective sleeve for motor parts of the present invention has an appropriate elasticity when pressed in a flexible cylindrical shape, has good insertability for parts such as coils, and has higher partial discharge characteristics (electrical insulation performance) than conventional sleeves. Even if the step of washing the yarn oil agent applied to the filament is omitted, it has good electrical insulation. Also, if there are almost no openings (voids) on the sleeve surface and there is an appropriate thickness (wall thickness), an increase in the amount of material fibers used can be suppressed, and the oil applied to the raw yarn can be washed away. It can be set as the protection sleeve for motor parts which can obtain high electrical insulation performance.
- FIG. 1 is a trace drawing in which the side surface of a protective sleeve for motor parts in one embodiment of the present invention is observed with an optical microscope (50 ⁇ magnification).
- FIG. 2 is a trace drawing in which the side surface of the protective sleeve for motor parts in Comparative Example 4 is observed with an optical microscope (50 ⁇ magnification).
- FIG. 3 is a schematic explanatory view showing a production method and structure of a multifilament entangled yarn used in one embodiment of the present invention.
- FIG. 4A is a schematic explanatory view showing an apparatus for manufacturing a braided sleeve in one embodiment of the present invention, and FIG. 4B is an explanatory view of the main part.
- the present inventor has a single yarn fineness within a specific range, and an opening (hereinafter also referred to as “sleeve”) on the surface of a protective sleeve for motor parts (hereinafter also referred to as “sleeve”). If there is almost no air gap) and there is an appropriate thickness (wall thickness), the increase in the amount of material fibers used can be suppressed, and high electrical insulation performance can be obtained without washing and removing the oil applied to the raw yarn. As a result, the present invention has been found.
- the protective sleeve of the present invention is used as a motor part.
- a motor part For example, a coil, a wire, and a binding string.
- the protective sleeve of the present invention is a cylindrical sleeve for covering and protecting a motor component such as an enameled wire, and is used for protecting a coil.
- the motor include motors for automobiles, motors for household appliances such as air conditioners and refrigerators, motors for power, and the like, and motors for automobiles are preferable.
- Examples of the automobile motor include an electric automobile motor, a gasoline automobile motor, and a diesel automobile motor, and an electric automobile motor is preferable.
- the protective sleeve of the present invention is a braid obtained by assembling a multifilament yarn made of synthetic fiber into a cylindrical shape of 24 beats or more.
- 24, 32, 40, 48, 56, 64, 72, 80, 88, 96 are generally used as the number of striking machines (the number of bobbins set up when assembling the braid).
- 32 about 4 mm in diameter
- 48 about 6 mm in diameter
- 56 about 7 mm in diameter
- 64 about 8 mm in diameter
- a preferred number of assembling machines is 32 to 64.
- the fiber constituting the sleeve of the present invention is a multifilament yarn having a single yarn fineness larger than usual, and the single yarn fineness is 15 dtex or more and less than 30 dtex.
- the single yarn fineness is less than 15 dtex, a stable cylindrical sleeve cannot be obtained because the fiber is thin and soft, and the insertability of the components is insufficient due to the flat shape.
- the single yarn fineness is 30 dtex or more, the sleeve has a cylindrical shape and good stability, but there are problems in terms of partial discharge performance and filament manufacturing.
- a monofilament spinning machine or a multifilament spinning machine that produces filaments of about 30 to 100 dtex single yarn.
- a monofilament spinning machine that cools the melted and discharged yarn with water is more suitable for single yarn fineness of about 50 dtex or more.
- a yarn with a length of less than about 50 dtex is narrower than the appropriate area of the monofilament spinning machine, and is produced by reducing the discharge amount
- a multifilament spinning machine generally has a high spinning speed and high productivity.
- the yarn is cooled by an air cooling system using cold air, the cooling is usually insufficient at 30 dtex or more.
- insufficient heating occurs in stretching, not only does the spinning stretching speed have to be lowered, but productivity is lowered, and there is a problem that yarn breakage and fineness unevenness are likely to occur. More specifically, when the thickness is 30 to 100 dtex, particularly 30 to 50 dtex, both the monofilament spinning machine and the multifilament spinning machine have problems of unstable quality and high cost.
- the single yarn fineness of the present invention is 15 dtex or more and less than 30 dtex. If it is this range, there exists a merit which can obtain substantially the same level of productivity as usual spinning below 10 dtex with a multifilament spinning machine.
- a preferable single yarn fineness is 16 to 25 dtex. Within this range, productivity is higher and costs can be reduced.
- the coverage and thickness of the sleeve are important for improving the partial discharge characteristics.
- Good coverage means a state where the entire sleeve surface is covered with fibers and there are almost no voids or gaps. For example, the state shown in FIG.
- FIG. 2 if there are openings (voids) that are not covered with fibers, the discharge characteristics deteriorate. The presence or absence of an opening (gap) is determined by observing with an optical microscope at a magnification of 50 times.
- the preferred sleeve thickness of the present invention is 0.35 mm to 0.55 mm, more preferably 0.38 mm to 0.50 mm.
- the inventor winds a filament having a single yarn fineness of 15 dtex or more and less than 30 dtex as a braided yarn having a total fineness of 800 to 1500 dtex and makes a cylinder of 24 or more strokes. It has been found that by forming a string into a shape, a sleeve that retains a cylindrical shape and has improved electrical insulation performance is obtained, and that it is excellent in lightness, compactness, and economy.
- a preferred single yarn fineness is 16 to 25 dtex, and a preferred total fineness is 850 to 1450 dtex. If it is this range, a cylindrical shape will be hold
- the thickness of the sleeve becomes thin and the discharge characteristics deteriorate. On the other hand, if it exceeds 1500 dtex, the sleeve becomes thick, which causes problems in terms of lightness, compactness, and cost.
- the number of filaments of the multifilament yarn after the combined yarn is preferably 27 to 100, more preferably 36 to 60.
- a preferable sleeve has a thickness (wall thickness) of 0.35 to 0.55 mm, more preferably 0.38 to 0.50 mm. These wall thicknesses can be obtained relatively easily by using the yarn having the above-mentioned total fineness and setting the appropriate stringing conditions.
- the fiber material used for the protective sleeve is not particularly limited, but a material having heat resistance and high temperature oil resistance is preferably used.
- heat resistance the melting point is 270 ° C. or higher, preferably 280 ° C. or higher.
- polyphenylene sulfide (PPS) fiber or aramid fiber is preferably used.
- the aramid fiber there are a para-aramid fiber and a meta-aramid fiber, and a meta-aramid fiber having high fiber elongation is preferably used.
- heat-resistant fibers such as polyether ether ketone (PEEK), polyether imide, nylon 9T-based and 6T-based semi-aromatic polyamide can be used as long as the high-temperature oil resistance satisfies the conditions of the present invention.
- PEEK polyether ether ketone
- polyether imide polyether imide
- nylon 9T-based and 6T-based semi-aromatic polyamide can be used as long as the high-temperature oil resistance satisfies the conditions of the present invention.
- the sleeve of the present invention preferably has a high temperature oil resistance.
- the high temperature oil resistance is a value measured by the following method and is 50% or more.
- high temperature oil resistance (%) (T ′ / T) ⁇ 100
- T means the tensile strength of the protective sleeve before treatment
- T ′ means the tensile strength of the protective sleeve after treatment.
- the tensile strength is the tensile strength according to JIS L1013-8.5.1.
- the entire protective sleeve is placed in a mixture of 0.5 wt% water and 99.5 wt% automatic transmission fluid in a closed container, and the temperature of the mixture in the container is 1000%. This is a process of heating the container so as to be maintained at 150 ° C. for a period of time.
- High temperature oil resistance is most affected by the sleeve material, but is also affected by the thickness of the single fiber and the fine structure of the fiber.
- the oil for evaluating the high temperature oil resistance in the present invention contains a small amount of water, which means that the hydrolysis resistance is high.
- the high temperature oil resistance is preferably 70% or more, more preferably 80% or more, and still more preferably 85% or more. This is because, for example, in an electric vehicle, a motor that can operate stably over a long period of time can be obtained.
- the sleeve of the present invention has improved electrical insulation characteristics compared to the conventional product.
- the electrical insulation performance (partial discharge performance) of the sleeve is indicated by the partial discharge start limit voltage (V) obtained by the following measurement method.
- Sample preparation The sleeve was cut to a length of about 100 mm, and left as it was for 24 hours in an environment (constant temperature and humidity chamber) at a temperature of 40 ° C. and a relative humidity of 90% RH assuming a high humidity environment condition as a pretreatment.
- Measuring instrument Partial electric discharge measuring instrument (TYPE B009) manufactured by Mitsubishi Cable Measurement: The samples left under high humidity were taken immediately and measured immediately. A coil wire bundle to be a B electrode is inserted into the sleeve. A pressure of 1 N was applied to the brass disc serving as the A electrode from the outside of the sleeve, and a pressure was applied every 100 V between AB, that is, between the inside and outside of the sleeve. The maximum applied voltage with a discharge charge amount of 0 Pc (picocoulomb) was defined as the partial discharge start limit voltage. The measurement is shown as an average of 5 times.
- the partial discharge voltage was about 1300 V after cleaning and about 1000 V before cleaning (for example, Patent Document 5), but the sleeve of the present invention was measured immediately after being left under high humidity (no cleaning).
- the most preferable material for the sleeve material of the present invention is polyphenylene sulfide (PPS) from the viewpoints of heat resistance, high temperature oil resistance, and electrical insulation under high humidity. Since polyamides having an amide group absorb moisture under high humidity and lower electrical insulation, PPS is more preferably used.
- the sleeve of the present invention is characterized by good coverage and no voids (openings) observed on the sleeve surface.
- a thick monofilament is used as in Patent Document 3
- the yarn is hard, so the stitches are not clogged by the pushing-up operation of the string, and it is observed by a stereomicroscope observation that there are many voids especially near the entanglement point of the monofilament. It was. Due to the presence of this gap, it is considered that the discharge start limit voltage is low although the thickness is equal to or greater than that of the present invention.
- the single yarn fineness was as thick as 30 dtex or more, it was found that the electrical insulation was insufficient with respect to the thickness as compared with the present invention. This is presumably because the single filament fineness is large, the bending hardness of the entire filament is increased, and gaps are likely to occur in the vicinity of the filament group, resulting in a decrease in electrical insulation.
- FIG. 1 is a trace drawing in which the side surface of a protective sleeve for motor parts in one embodiment of the present invention is observed with an optical microscope (50 ⁇ magnification).
- the sleeve 10 is assembled with the multifilament braids 11 and 12 or the like, but no opening (gap) is observed on the surface thereof. That is, the multifilament braids 11, 12 and the like are tightly packed, and no gap is observed.
- the multifilament yarn used in the present invention is preferably entangled.
- the entanglement is performed by treating the multifilament yarns with an air entangler to entangle the constituent fibers of the multifilament yarns. Due to the entanglement, the multifilament yarn has better converging properties (unification) and does not become disjointed, improving process passability and handling properties.
- the entangled portion of the entangled yarn is easy to unwind due to tension, friction, and the like when assembled into the braid.
- the constituent yarn of the sleeve assembled into the braid tends to be flattened as a whole, which also contributes to eliminating the gaps, and in contrast to selecting the single yarn fineness and total fineness of the multifilament yarn within a specific range. It produces a synergistic effect.
- the yarn In the case of a non-twisted yarn, the yarn has poor convergence, and fluff and yarn breakage are likely to occur during tube winding and stringing.
- the bundling property is good, but the cross section is rounded and voids are easily generated, which is not preferable.
- FIG. 3 is a schematic explanatory view showing the production method and structure of a multifilament entangled yarn used in one embodiment of the present invention.
- Synthetic fiber multifilament supply yarn 1 is supplied to fluid entanglement device 5, and pressurized air 6 is supplied thereto to form an opening portion 2 and a converging portion 3 to obtain entanglement yarn 4. Since the converging portions 3 are formed at both ends of the spread portion 2, when attention is paid to the spread portion 2, the spread portions exist intermittently.
- the confounding number of the converging portions 3 is preferably in the range of 5 to 20 / m.
- As a method for measuring the degree of entanglement a filament yarn is floated on water and the number of entanglements is measured.
- a filament yarn having a single yarn fineness of 15 dtex or more and less than 30 dtex is wound in a tube so that the total fineness becomes 800 to 1500 dtex.
- One multifilament may be used for tube winding, or a plurality of multifilaments may be combined to form tube winding. It is preferable to use this tube winding to make a string while pushing it up with a stringing machine of 24 or more strokes.
- the stringer mainly changes the sleeve thickness (inner diameter, outer diameter) depending on the number of shots. More than 24 strikes and less than 96 strikes are preferably used.
- the string that is being assembled in the stringing process moves up and down vertically in the center of the stringing machine, from the bottom to the top with a round or polygonal metal or wooden rod with a round end roughly equivalent to the inner diameter of the string A cylindrical sleeve can be obtained by assembling while pushing (pushing up).
- a single yarn fineness and a total fineness filament of the present invention are used to make a string, and when the tension is lowered, a sleeve with good coverage with a tightly packed mesh is obtained.
- the tension is applied, the sleeve is stretched and the inner diameter becomes narrower. In some cases, the assembly is displaced and the discharge characteristics are deteriorated.
- the fineness of the single yarn is thicker than that of the present invention, the yarn becomes hard, so that even when the pushing operation is performed, there is a tendency that the stitches are not sufficiently clogged and a void portion tends to be formed.
- the number of stitches is preferably 20 to 40 stitches / inch (25.4 mm), more preferably 23 to 36 stitches / inch (25.4 mm).
- the preferable weight per unit length of a sleeve is 4 g / m or more and 12 g / m or less.
- the shape can be stabilized by installing a heater and heat-treating it as necessary from the push-up to the take-off stage.
- the shape can be stabilized by performing heat treatment for 0.2 to 5 minutes at an ambient temperature of 160 to 290 ° C. in a non-contact state.
- the partial discharge start limit voltage of the sleeve can obtain a high electrical insulation of 1700 V or higher even when an oil agent is contained.
- the preferred oil content is 0.3 to 2.0% by weight.
- the electrical insulation performance is further improved.
- the filament yarn that is normally used is provided with an oil agent to improve process passability in higher-order processing such as the yarn production process, knitting, weaving, and braiding.
- oil components there are components that reduce electrical insulation, such as antistatic agents and emulsifiers, but if these components are eliminated, fluff and thread breakage will occur frequently during the manufacturing process and processing process, It is difficult to completely prevent a decrease in electrical insulation without reducing the processability with an oil component.
- the protective sleeve of the present invention has a characteristic that it exhibits a sufficient electrical insulation characteristic even when it contains a normal yarn oil.
- the protective sleeve for a motor part of the present invention varies depending on the type of motor and part to be applied and is not particularly limited, but generally, for example, a sleeve having an inner diameter of 3 to 9 mm is used. A more preferable inner diameter is 3 to 8 mm.
- the length may be cut to the required length at an arbitrary stage, and is usually about 3 to 50 cm.
- the protective sleeve has an inner diameter of 3 to 8 mm and a length of 3 to 50 cm.
- a long sleeve can be cut to a required length at the motor component manufacturing site and incorporated into the component.
- the protective sleeve is preferably finally varnished. This is because the electrical insulation of the protective sleeve can be enhanced and the resistance against various mechanical stresses can be improved if the varnish treatment is performed.
- the varnish treatment can be performed after or before the motor component to be protected is inserted into the protective sleeve, but is more preferably performed after the insertion. This is because the work efficiency of the insertion process is better.
- the varnish treatment can be performed, for example, by inserting a motor component into the protective sleeve, then impregnating the protective sleeve with a varnish, applying and applying it using a spray, dripping, brush, or the like, drying, and curing.
- the sleeve of the present invention retains a cylindrical shape and does not become flat, but also has a feature that is easy to adapt to the shape of the coil wire after insertion.
- FIG. 4A is a schematic explanatory view showing an apparatus for manufacturing a braided sleeve in one embodiment of the present invention
- FIG. 4B is an explanatory view of the main part.
- the manufacturing apparatus 30 includes a gantry (31, 32), a bobbin 33, a push-up portion 35, and a driving device (not shown). As the bobbin 33 rotates, the yarn 34 wound around the bobbin 33 is braided on the circumference of the cylindrical portion 37 of the push-up portion 35 to create a braided sleeve 38.
- the push-up portion 35 includes a hemispherical head 36 that moves up and down in conjunction with the rotational movement of the bobbin 33 and a cylindrical (or polygonal) cylindrical portion 37 at the center thereof.
- the outer diameter of the cylindrical portion 37 is substantially equal to the inner diameter of the braided sleeve 38.
- the braided sleeve 38 is then sent to the heater 39 and heat set.
- the heat-set braided sleeve 40 passes through take-out guides (pulleys) 41 and 42 and is shaken off to the storage container 43.
- the stroke length and the number of strokes of the push-up portion 35 may be set as appropriate.
- the heat setting may be performed in a continuous process or in a separate process.
- Inner diameter, thickness (thickness), number of stitches Inner diameter: conical taper gauge (measuring instrument: taper gauge 710B type (4-15mm) manufactured by Niigata Seiki Co., Ltd.) Inserted and lightly read the gauge at the end of the sleeve.Gem (eyes / inch): Touch the magnifying glass (linen tester) with a 1-inch frame on the side of the sleeve so that the sleeve does not deform. The number of groups between 1 inch was measured to 0.5.Thickness (wall thickness): Using a caliper, the sleeve was sandwiched between the inside and the outside, and the thickness (mm) was measured. The average of 3 times was used.
- a pressure of 1 N was applied to a brass disc (diameter: 25 mm, thickness 20 mm) serving as an A electrode from the outside of the sleeve, and a pressure was applied every 100 V between AB, that is, between the inside and outside of the sleeve.
- the step-up speed is about 0.2 seconds per 100V.
- the maximum applied voltage with a discharge charge amount of 0 Pc (picocoulomb) was defined as the partial discharge start limit voltage. The measurement was shown as an average of 5 times.
- the partial discharge start limit voltage (V) was measured in units of 100 V by the method described above.
- a discharge start limit voltage of 1000 V means that the discharge amount is 0 Pc up to 1000 V, but a value exceeding 0 is reached at 1100 V.
- the side surface of the sleeve was observed with an optical microscope and judged by the presence or absence of voids.
- the gap is a gap that allows the inside of the sleeve to be seen through between the braided yarn (multifilament) and the braided yarn (multifilament) in the vicinity of the cross of the braided yarn, etc.
- A was judged and B exceeding the number was judged as B.
- Number of entangled multifilaments The number of entangled portions having a length of 1 mm or more was measured by a water immersion method and converted to the number per 1 m. Ten multifilament yarns were measured and indicated by their average value.
- Examples 1 to 7, Comparative Examples 1 to 5 “Torucon” (trade name) manufactured by Toray Industries, Inc., PPS fibers (multifilament yarn) having a melting point of 285 ° C. are set to the single yarn fineness and total fineness shown in Tables 1 and 2, and the 56-punch stringing machine shown in FIG. Used to make a string by a push-up method.
- “T” of the yarn is the total fineness (unit: dtex)
- “F” is the number of constituent filaments.
- Each raw yarn was air entangled by the method shown in FIG. The yarn speed was 2200 m / min, and the supply air pressure was 0.4 MPa.
- Example 1 Two yarns of yarn 500T-20F (single yarn 25 dtex, number of entanglement 11 / m),
- Example 2 Two yarns of raw yarn 440T-18F (single yarn 24.4 dtex, entanglement number 10 / m),
- Example 3 Two yarns of raw yarn 470T-20F (single yarn 23.5 dtex, entanglement number 9 / m),
- Example 4 Two yarns 550T-25F (single yarn 22dtex, entangled number 11 / m), Example 5;
- Four yarns 220T-10F (single yarn 22dtex, entangled number 9 / m)
- Combined yarn example 6 raw yarn 167T-10F (single yarn 16.7 dtex, entangled number 10 / m) 6 mixed yarn example 7; original yarn 470T-20F (single yarn 23.5 dtex, entangled number 10) / M) 3 yarns Except for Example 6, the oil is the same component.
- Table 2 summarizes the sleeve characteristics and discharge characteristics.
- the sleeves of the examples of the present invention had a cylindrical holding property (soft and moderate resilience and conformability), good coverage, and excellent electrical insulation with a discharge starting voltage of 1700 V or more.
- FIG. 1 shows that the side surface of the protective sleeve for motor parts in Example 1 has no opening (gap) by an optical microscope (50 times magnification).
- Example 1 Comparative Example 1 Using the same raw yarn as in Example 5, the two yarns were used to make a total fineness of 440T. The stitches were clogged by the push-up of the sleeve, and the coverage was almost good, but the thickness was insufficient and the discharge characteristics were insufficient.
- Comparative Example 2 The same raw yarn as in Example 1 was used to make a single string. As in Comparative Example 1, the stitches were clogged by pushing up (the number of stitches increased), but the discharge characteristics were insufficient due to insufficient thickness.
- Comparative Example 3 Using the same raw yarn as in Example 6, the number of combined yarns was reduced from 6 to 4, and the total fineness was 670 dtex. Although the thickness increased compared with Comparative Examples 1 and 2, the discharge characteristics were insufficient.
- Examples 1 to 7 have high partial discharge characteristics (electrical insulation performance), and good electrical insulation can be achieved even if the step of cleaning the raw yarn oil applied to the filament is omitted. It has been confirmed that it has good cylindrical shape retention characteristics, and also has high coverage and high-temperature oil resistance.
- Comparative Examples 1 to 3 since the total yarn fineness of one braid unit of the braid was less than 800 dtex, the covering property was good, but the thickness was insufficient and the partial discharge characteristics were insufficient. .
- Comparative Example 4 used monofilaments with high fineness, the number of stitches could not be increased, and it was not possible to assemble the fibers with the fibers spread uniformly. The covering properties and partial discharge characteristics were insufficient.
- the comparative example 5 had a high single yarn fineness, the thickness was too thick, and the coverage and partial discharge characteristics were insufficient.
- Example 8 Two raw yarns (550T-25F) used in Example 4 were combined, and a sleeve was formed by 32 punches (Example 8: around 4 mm inside diameter) and 64 beats (Example 9: around 8 mm inside diameter). After the assembly, as shown in FIG. 4, heat treatment was performed at 190 ° C. for 0.5 minutes with a cylindrical non-contact heater. The results are shown in Tables 1 and 2. In any case, the characteristics as a protective sleeve were good.
- Example 6 A string was made using the same raw yarn as in Example 1 except that the air entanglement treatment was not performed. However, the yarn has poor convergence (integration), fluff and yarn breakage occurred, and stable braiding was difficult.
- the protective sleeve for motor parts according to the present invention is suitable for motors for automobiles, home appliances such as air conditioners and refrigerators, power motors, and the like.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Braiding, Manufacturing Of Bobbin-Net Or Lace, And Manufacturing Of Nets By Knotting (AREA)
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
Description
ここで、高温耐油性能(%)=(T’/T)×100
前記式において、Tは、処理前の前記保護スリーブの引張強さを意味し、T’は処理後の前記保護スリーブの引張強さを意味する。
前記引張強さとは、JIS L1013-8.5.1における引張強さである。
前記処理とは、前記保護スリーブの全体を、密閉容器中の0.5重量%の水と99.5重量%のオートマチック・トランスミッション・フルードの混合物中に入れ、前記容器中の混合物の温度が1000時間の間150℃で維持されるよう前記容器を加温する処理である。
測定器:三菱電線株式会社製 部分放電測定器(TYPE B009)
測定:高湿下放置したサンプルを1サンプルずつ取り出しただちに測定した。
スリーブ内部にB電極となるコイル線束を挿入する。スリーブ外部からA電極となる真鍮製の円板に1Nの加圧をかけ、AB間すなわちスリーブの内外間に100V毎に昇圧印加した。放電電荷量が0Pc(ピコクーロン)である最大印加電圧を部分放電開始限界電圧とした。測定は5回の平均値で示す。
長さ60cmの保護スリーブの全体を、密閉容器中の0.5重量%の水と99.5重量%のオートマチック・トランスミッション・フルード(ATFWS(商品名)、エッソ石油(株)製)の混合物(5リットル)中に入れ、前記容器中の混合物の温度が1000時間の間150℃で維持されるよう前記容器を加温した。この処理前の前記保護スリーブの引張強さ(T)と、処理後の前記保護スリーブの引張強さ(T’)を、JIS L1013-8.5.1法に準じて測定した。得られた各引張強さを、次の式に導入して、高温耐油性能を求めた。5回測定して得られた値の平均値を算出した。
高温耐油性能(%)=(T’/T)×100
ここで、T:処理前の前記保護スリーブの引張強さ、T’:処理後の前記保護スリーブの引張強さである。
内径:円錐形のテーパーゲージ(測定器:新潟精機製テーパーゲージ710B型(4~15mm)をテーパー先端が上になるようにして立て、スリーブを挿入して軽くのせ、スリーブ端面部のゲージを読んだ。組目(目/インチ):一辺が1インチのフレームを有する拡大鏡(リネンテスター)をスリーブ側面にスリーブが変形しない程度に軽く接触させ、1インチ間の組目の数を0.5目まで測った。厚み(肉厚):ノギスを使用してスリーブの内側と外側に挟み、厚み(mm)を計測した。測定はいずれも3回の平均とした。
標準状態(温度20±3℃、相対湿度65±3%)で24時間放置したスリーブを、50cmの長さに切断した。その重量を測定し、保護スリーブ1mあたりの重さを算出した。
(a)サンプル準備:スリーブを約100mmの長さにカットし、前処理として高湿度環境条件を想定した温度:40℃、相対湿度:90%RHの環境下(恒温恒湿槽)に24時間放置した。
(b)測定器:三菱電線株式会社製 部分放電測定器(TYPE B009)
(c)測定:高湿下放置したサンプルを1サンプルずつ取り出しただちに測定した。
(d)スリーブ内部にB電極となるコイル線束を挿入した。スリーブ外部からA電極となる真鍮製の円板(直径:25mm、厚み20mm)に1Nの加圧をかけ、AB間すなわちスリーブの内外間に100V毎に昇圧印加した。昇圧速度は100V当り約0.2秒である。放電電荷量が0Pc(ピコクーロン)である最大印加電圧を部分放電開始限界電圧とした。測定は5回の平均値で示した。
(e)前記の方法で部分放電開始限界電圧(V)を100V単位で測定した。放電開始限界電圧が1000Vは、1000Vまでは放電量が0Pcであるが1100Vでは0を越える数値になることを意味する。
(f)測定室環境は、23±2℃、50±5%RHとした。「洗浄あり」は保護スリーブのかせを洗濯袋に入れ自動洗濯機(サンヨー製ASW-E10ZA)で濯ぎ3回、計30分洗浄脱水したのち室温にて乾燥した。測定サンプルは約100mm長さにカットして用いた。「洗浄なし」は製紐品をそのままカットして使用した。
JISL 1013(1999)8.27c)法でメチルアルコールを用いて抽出した。
スリーブを親指と人差し指でつまみ、数回圧縮、回復操作を繰り返し、形状の保持回復性と追随性(なじみ性)を評価した
A 適度な回復性となじみ性がある
B 回復性は高いがやや硬くなじみ性が不十分
図1~2に示すように、スリーブの側面を光学顕微鏡で観察して空隙の有無で判定した。ここで空隙は、スリーブ側面を50倍で顕微鏡観察し、組み糸が交差する近辺等において、組み糸(マルチフィラメント)と組み糸(マルチフィラメント)の間に観察されるスリーブ内部が透視できる隙間のことをいい、100平方ミリメートル当りの個数が0~0.5個の場合A,それを超えるものをBとして判定した。
水浸漬法により長さ1mm以上の交絡部の個数を測定し、1mあたりの個数に換算した。マルチフィラメント糸10本を測定し、その平均値で示した。
東レ(株)製“トルコン”(商品名)、融点:285℃のPPS繊維(マルチフィラメント糸)を表1~2に示す単糸繊度、総繊度とし、図4に示す56打ち製紐機を用いて突き上げ方式で製紐した。下記において、原糸の“T”はトータル繊度(単位:dtex)、“F”は構成フィラメント本数のことである。原糸はいずれも図3に示す方法でエアー交絡処理した。糸速度は2200m/分、供給空気の圧力は0.4MPaとした。
実施例1;原糸500T-20F(単糸25dtex、交絡数11個/m)を2本合糸、
実施例2;原糸440T-18F(単糸24.4dtex、交絡数10個/m)を2本合糸、
実施例3;原糸470T-20F(単糸23.5dtex、交絡数9個/m)を2本合糸、
実施例4;原糸550T-25F(単糸22dtex、交絡数11個/m)を2本合糸
実施例5;原糸220T-10F(単糸22dtex、交絡数9個/m)を4本合糸
実施例6;原糸167T-10F(単糸16.7dtex、交絡数10個/m)を6本合糸
実施例7;原糸470T-20F(単糸23.5dtex、交絡数10個/m)を3本合糸
実施例6を除き油剤は同一成分である。実施例1~4の原糸は製紐性を阻害しない範囲で付与油分量が通常(0.8重量%程度)より少なくなっている。
実施例5と同じ原糸を使い、2本合糸で総繊度が440Tとして製紐した。スリーブの突き上げにより組み目が詰まり、被覆性はほぼ良好であったが、厚みが不十分で放電特性は不十分であった。
実施例1と同じ原糸を使用し1本使いで製紐した。比較例1と同様、突き上げにより組み目は詰まった(組み目数が増加した)が、厚み不足で放電特性は不十分であった。
実施例6と同じ原糸で合糸本数を6本から4本に減らし総繊度670dtexとして製紐した。比較例1,2より厚みは増加したが放電特性は不十分であった。
単糸繊度640dtex(直径0.25mm)のモノフィラメントと単糸4.4dtexの通常マルチフィラメントをそれぞれ28本づつ管巻きして、一本ごとにセットして製紐した。しかし、部分放電特性は不十分であった。これは、繊度の高いモノフィラメントを使用したため、組み目数を上げることができず、繊維を均一に広げた状態で組み上げることができなかったことを示している。図2に示す顕微鏡観察写真でもモノフィラメントの交差する付近で空隙が認められた。矢印先端部分が空隙である。
440T-12F(単糸36dtex)片撚り60T/mのフィラメントを2本合糸して製紐した。単糸繊度が高く集束性が悪いため撚り加工された糸を使用した。厚みは大きいにもかかわらず放電特性は不十分であった。単糸繊度が高いこと及び撚りを加えることを余儀なくされているため、フィラメント間、ヤーン間のすき間があり放電特性が不十分になったと推定される。
実施例4で使用した原糸(550T-25F)を2本合糸し、32打ち(実施例8;内径4mm前後)および64打ち(実施例9;内径8mm程度)でスリーブを製紐した。組み上げた後、図4に示すように円筒形の非接触ヒーターで190℃、0.5分間の熱処理を行った。結果を表1,2に示した。いずれも保護スリーブとしての特性は良好であった。
エアー交絡処理をしないほかは実施例1と同じ原糸を使用して製紐した。しかし、糸の集束性(一体性)が悪く、毛羽、糸切れが発生し、安定した編組が困難であった。
2 開繊部分
3 集束部分
4 交絡糸
5 流体交絡器
6 圧力空気
11,12,21,22 マルチフィラメント組糸
23,24 モノフィラメント組糸
25 開口(空隙)
30 編組スリーブ製造装置
31,32 架台
33 ボビン
34 糸
35 突き上げ部
36 ヘッド
37 円筒部
38,40 編組スリーブ
39 加熱ヒーター
41,42 取出しガイド(プーリー)
43 収納容器
Claims (13)
- 合成繊維からなるマルチフィラメント糸を円筒状の24打ち以上の組紐に組み上げたモーター部品用保護スリーブであって、
前記マルチフィラメント糸は単糸繊度が15dtex以上30dtex未満であり、
前記組紐の1編組単位のヤーン総繊度が800~1500dtexの範囲であることを特徴とするモーター部品用保護スリーブ。 - 前記マルチフィラメント糸は、交絡されている請求項1に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの部分放電開始限界電圧が1700V以上である請求項1又は2に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの肉厚が0.35~0.55mmの範囲である請求項1~3のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの高温耐油性能が70%以上である請求項1~4のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記合成繊維がポリフェニレンサルファイド繊維である請求項1~5のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記マルチフィラメント糸の油分が0.3~2.0重量%で前記部分放電開始限界電圧が1700V以上である請求項1~6のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの側面を光学顕微鏡により倍率50倍で観察したとき、100平方ミリメートル当り、組み糸と組み糸の間に観察されるスリーブ内部が透視できる隙間の個数が0~0.5個である請求項1~7のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの組み目数は、23~40目/25.4mmである請求項1~8のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの単位長さあたりの重量は4~12g/mである請求項1~9のいずれか1項に記載のモーター部品用保護スリーブ。
- 前記保護スリーブの内径は3~8mmである請求項1~10のいずれか1項に記載のモーター部品用保護スリーブ。
- 請求項1~11のいずれか1項に記載のモーター部品用保護スリーブの製造方法であって、
単糸繊度が15dtex以上30dtex未満で、管巻きした1編組単位のヤーン総繊度が800~1500dtexのマルチフィラメント糸を、24打ち以上の製紐機により組み上げながら、中心部の下から突き上げヘッドを垂直方向に上下運動させながら、先端部分が組紐の内径に略相当する丸みのある円形または多角形の棒の外周にそって組み上げることにより、円筒形のスリーブを得ることを特徴とするモーター部品用保護スリーブの製造方法。 - 前記マルチフィラメント糸は、空気交絡により交絡されている請求項12に記載のモーター部品用保護スリーブの製造方法。
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- 2011-04-15 US US13/813,871 patent/US8910554B2/en active Active
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JP2016211104A (ja) * | 2015-05-07 | 2016-12-15 | 株式会社ゴーセン | モーター用結束紐 |
JP2018501091A (ja) * | 2015-11-24 | 2018-01-18 | キム イムソンKIM, Im Sun | 水処理用中空糸膜補強用ブレードの内側面熱処理装置及びその熱処理装置を用いて製造されたブレード |
Also Published As
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JPWO2012017714A1 (ja) | 2013-10-03 |
US8910554B2 (en) | 2014-12-16 |
US20130125739A1 (en) | 2013-05-23 |
JP5285784B2 (ja) | 2013-09-11 |
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