JPH0441152A - Cooling device for built-in motor - Google Patents

Cooling device for built-in motor

Info

Publication number
JPH0441152A
JPH0441152A JP14969990A JP14969990A JPH0441152A JP H0441152 A JPH0441152 A JP H0441152A JP 14969990 A JP14969990 A JP 14969990A JP 14969990 A JP14969990 A JP 14969990A JP H0441152 A JPH0441152 A JP H0441152A
Authority
JP
Japan
Prior art keywords
temperature
cooling
stator
main shaft
motor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP14969990A
Other languages
Japanese (ja)
Inventor
Kiyoshi Masuda
潔 増田
Shozo Tsuda
津田 正三
Osamu Fukunaga
修 福永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daikin Industries Ltd filed Critical Daikin Industries Ltd
Priority to JP14969990A priority Critical patent/JPH0441152A/en
Publication of JPH0441152A publication Critical patent/JPH0441152A/en
Pending legal-status Critical Current

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  • Motor Or Generator Cooling System (AREA)
  • Automatic Control Of Machine Tools (AREA)

Abstract

PURPOSE:To improve the processing accuracy of a main shaft by equipping a temperature detector which detects the temperature change of a stator, a cooling adjusting means which adjusts the cooling temperature at a cooling part and a controller which controls this cooling adjusting means so that the stators temperature becomes a set temperature. CONSTITUTION:The temperature change of the stator 21 of a motor 2 is detected by a temperature detector 5 at the processing work times by a lathe, etc. Namely the temperature change close to a main shaft 3 is detected, a cooling adjusting means 6 is controlled by the output fed from a controller 7 based on the detection temperature thereof and the cooling temperature at a cooling part 15 is adjusted so that the stator 21 becomes at the specific set temperature. So the temperature of the main shaft 3 can be made to approach the outside air temperature and the thermal expansion difference of the main shaft 3 can be reduced. The processing accuracy of the main shaft 3 is thus improved.

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、主に旋盤などの工作機械に使用されるビルト
インモータの冷却装置に関する。
DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a cooling device for a built-in motor used mainly in machine tools such as lathes.

(従来の技術) この種ビルトインモータの冷却装置として、旋盤の主軸
頭を構成するハウジング内に冷却部を設け、該冷却部を
冷凍機の蒸発器として冷媒回路に介装させ、この冷媒回
路を循環される冷媒で前記冷却部を冷却することにより
、前記ハウジングに支持される主軸を冷却して、加工精
度を高めるようにしたものを、以前に提案した(特願平
2−103738号)。この構成は、第4図に示したよ
うに、内胴(A)と外胴(B)とを備えたハウジング(
H)の前記内胴(A)内に、モータ(M)と、該モータ
(M)で駆動される主軸(S)とを内装すると共に、前
記内胴(A)と外胴(B)との間に冷却部(E)を形成
して、この冷却部(E)を、圧縮機(C)と凝縮器(D
)及び膨張機構(V)とを備えた冷凍機(R)の蒸発器
として組込み、該冷凍機(R)を循環される冷媒で前記
冷却部(E)を冷却することにより、前記主軸(S)な
どの冷却を行って、その発熱を抑制するようにしたもの
である。尚、前記冷却部(E)の出口側と圧縮機(C)
の入口側との間には減圧機構(F)を介装させ、該減圧
機構(F)による圧力ドロップ分だけ、前記圧縮機(C
)の吸入圧を低くすることにより、前記蒸発器つまり冷
却部(E)での冷却湿度を高くして、その冷却温度と外
気温度(工作機械設置の室内温度であって、以下単に外
気温度という)との差をできるだけ少なくして、前記ハ
ウジング(H)側での結露発生を防止し、かつ、前記主
軸(S)の温度と外気温度との温度差による熱膨張差を
少なくして、加工精度を高めるようにしている。
(Prior art) As a cooling device for this type of built-in motor, a cooling section is provided in the housing that constitutes the spindle head of the lathe, and the cooling section is interposed in a refrigerant circuit as an evaporator of a refrigerator. We have previously proposed a method in which the main shaft supported by the housing is cooled by cooling the cooling section with a circulating refrigerant, thereby improving machining accuracy (Japanese Patent Application No. 103738/1999). As shown in FIG. 4, this configuration consists of a housing (
A motor (M) and a main shaft (S) driven by the motor (M) are installed inside the inner shell (A) of H), and the inner shell (A) and outer shell (B) A cooling section (E) is formed between the compressor (C) and the condenser (D).
) and an expansion mechanism (V), and the main shaft (S ) etc. to suppress the heat generation. In addition, the outlet side of the cooling section (E) and the compressor (C)
A pressure reducing mechanism (F) is interposed between the inlet side of the compressor (C) and the compressor (C
), the cooling humidity in the evaporator, that is, the cooling section (E), is increased, and the cooling temperature and outside air temperature (indoor temperature where the machine tool is installed, hereinafter simply referred to as outside air temperature) are increased. ) to prevent dew condensation on the housing (H) side, and to reduce the difference in thermal expansion due to the temperature difference between the temperature of the main shaft (S) and the outside temperature. I'm trying to improve accuracy.

(発明が解決しようとする課題) 所で、以上の冷却装置では、前記冷却部(E)での冷却
温度を、外気温度を考慮して、前記外胴(B)の外壁温
度が外気温度に近くなるように設定しているのであるが
、前記外壁温度と前記主軸(S)の温度との間には差が
生じ、このため主軸(S)の温度と外気温度とに差が生
ずることになり、この結果、前記主軸(S)の温度制御
が不正確となり、例えば、前記主軸(S)が旋盤などが
置かれた外気温度に対し冷却され過ぎたり、冷却が不充
分となったりして、前記主軸(S)に熱膨張差による歪
みが発生し、このため充分に加工精度を高めることがで
きない問題があった。
(Problem to be Solved by the Invention) In the above cooling device, the cooling temperature in the cooling section (E) is determined by taking the outside air temperature into consideration so that the outer wall temperature of the outer shell (B) is equal to the outside air temperature. However, there is a difference between the outer wall temperature and the temperature of the main shaft (S), which results in a difference between the temperature of the main shaft (S) and the outside air temperature. As a result, the temperature control of the spindle (S) becomes inaccurate, and for example, the spindle (S) may be cooled too much or insufficiently compared to the outside temperature where the lathe or the like is placed. However, there is a problem in that distortion occurs in the main shaft (S) due to the difference in thermal expansion, and therefore machining accuracy cannot be sufficiently improved.

本発明は以上のような問題に鑑みてなしたもので、その
目的は、前記主軸を外気温度に近い温度に冷却できて、
主軸の熱膨張差を少なくシ、それだけ加工精度を高める
ことができるビルトインモータの冷却装置を提供するこ
とにある。
The present invention was made in view of the above-mentioned problems, and its purpose is to be able to cool the main shaft to a temperature close to the outside air temperature.
It is an object of the present invention to provide a cooling device for a built-in motor that can reduce the difference in thermal expansion of a main shaft and improve machining accuracy accordingly.

(課題を解決するための手段) 上記目的を達成するために、本発明では、内胴(11)
と外胴(12)とをもつハウジング(1)の前記内胴(
11)内にステータ(21)及びロータ(22)をもつ
モータ(2)と、該モータ(2)で駆動される主軸(3
)とを内装し、前記内胴(11)と外胴(12)との間
に冷却部(15)を設け、この冷却部(15)を冷凍機
の蒸発器として冷媒回路に介装したビルトインモータの
冷却装置において、前記ステータ(21)に、該ステー
タ(21)の温度変化を検出する温度検出器(5)を設
けると共に、前記冷却部(15)での冷却温度を調整す
る冷却調整手段(6)と、この冷却調整手段(6)を、
前記ステータ(21)の温度が設定温度となるように制
御する制御器(7)とを備えたことを特徴とするもので
ある。また、前記温度検出器(5)は、前記ステータ(
21)のコイル温度変化を検出することが好ましい。
(Means for Solving the Problem) In order to achieve the above object, the present invention provides an inner shell (11).
and an outer shell (12).
11) a motor (2) having a stator (21) and a rotor (22) therein, and a main shaft (3) driven by the motor (2).
), a cooling section (15) is provided between the inner shell (11) and the outer shell (12), and this cooling section (15) is installed in the refrigerant circuit as an evaporator of the refrigerator. In the motor cooling device, the stator (21) is provided with a temperature detector (5) that detects a temperature change of the stator (21), and a cooling adjustment means that adjusts the cooling temperature in the cooling section (15). (6) and this cooling adjustment means (6),
The present invention is characterized by comprising a controller (7) that controls the temperature of the stator (21) to a set temperature. Further, the temperature detector (5) is connected to the stator (
21) It is preferable to detect the coil temperature change.

(作用) 旋盤などによる加工作業時には、前記温度検出器(5)
で前記モータ(2)のステータ(21)の温度変化が検
出され、つまり、前記主軸(3)近くの温度変化が検出
されて、その検出温度に基づく前記制御器(7)からの
出力により前記冷却調整手段(6)が制御され、前記冷
却部(15)での冷却温度が、前記ステータ(21)が
所定の設定温度となるように調整されるのであり、従っ
て、前記主軸(3)の温度を外気温度に近づけられるの
であって、前記主軸(3)の熱膨張差を少なくシ、それ
だけ、加工精度が高められるのである。
(Function) During machining work using a lathe, etc., the temperature detector (5)
A temperature change in the stator (21) of the motor (2) is detected, that is, a temperature change near the main shaft (3) is detected, and an output from the controller (7) based on the detected temperature is used to adjust the temperature of the motor (2). The cooling adjustment means (6) is controlled, and the cooling temperature in the cooling section (15) is adjusted so that the stator (21) reaches a predetermined set temperature. Since the temperature can be brought closer to the outside temperature and the difference in thermal expansion of the main shaft (3) can be reduced, the machining accuracy can be improved accordingly.

また、前記温度検出器(5)により前記ステータ(21
)のコイル温度変化を検出するときは、前記検出器(5
)で前記主軸(3)の温度に一層近い温度変化が検出さ
れるため、該主軸(3)の−層正確な温度制御が可能と
なって、加工精度をより高められる。
Further, the stator (21) is detected by the temperature detector (5).
), when detecting a change in the coil temperature of the detector (5).
), a temperature change closer to the temperature of the spindle (3) is detected, making it possible to accurately control the temperature of the spindle (3), thereby further improving machining accuracy.

(実施例) 第3図は旋盤などの工作機械に使用されるビルトインモ
ータの冷却装置を示しており、該図中、(1)は旋盤な
どの主軸頭となるハウジングであって、内胴(11)と
外胴(12)とを備え、前記内胴(11)の内部にステ
ータ(21)とロータ(22)とから成るモータ(2)
を組付けると共に、該モータ(2)のロータ(22)に
、前記ハウジング(1)の外方に向けて突出される主軸
(3)を結合して、この主軸(3)の軸方向両側を前記
内胴(11)内に複数の軸受(13゜13)を介して回
転可能に支持する一方、前記内胴(11)と外胴(12
)との軸方向両側にそれぞれ端板(14,14)を取付
けて、これら各端板(14)と内胴(11)及び外胴(
12)とで画成される空間内に冷却部(15)を形成し
ている。同図中、(16)(17)は前記冷却部(15
)の上下部位に設けた冷媒の入口と出口である。
(Example) Fig. 3 shows a cooling device for a built-in motor used in a machine tool such as a lathe. 11) and an outer shell (12), and a stator (21) and a rotor (22) inside the inner shell (11).
At the same time, the main shaft (3) protruding outward from the housing (1) is coupled to the rotor (22) of the motor (2), and both sides of the main shaft (3) in the axial direction are connected to the rotor (22) of the motor (2). The inner shell (11) is rotatably supported via a plurality of bearings (13°13), while the inner shell (11) and the outer shell (12)
), and the end plates (14, 14) are attached to both sides of the inner shell (11) and the outer shell (
A cooling part (15) is formed in the space defined by the cooling part (12) and the cooling part (15). In the same figure, (16) and (17) are the cooling parts (15
) are the refrigerant inlet and outlet provided at the upper and lower parts of the refrigerant.

また、前記冷却部(15)は、冷凍機の蒸発器として冷
媒回路に介装させるのであり、即ち、第1図で明らかに
したように、圧縮機(41)とファン(42a)を付設
した凝縮器(42)及び感温膨張弁(43)とを備えた
冷凍機(4)の冷媒回路で、前記膨張弁(43)の出口
側における液配管と前記圧縮機(41)の入口側におけ
るガス配管との間に、前記入口(16)と出口(17〕
とを介して、前記冷却部(15)を接続し、該冷却部(
15)に前記冷媒回路中の冷媒を循環させることにより
、前記冷却部(15)を蒸発器として作用させ、前記主
軸(3)などを冷却するようにしている。尚、同図中、
(44)は前記感温膨張弁(43)の感温筒、(45)
は前記感温膨張弁(43)と前記圧縮機(41)の吸入
側との間に配管した均圧管である。
Further, the cooling section (15) is installed in the refrigerant circuit as an evaporator of the refrigerator, that is, as shown in FIG. 1, a compressor (41) and a fan (42a) are attached. A refrigerant circuit of a refrigerator (4) including a condenser (42) and a temperature-sensitive expansion valve (43), with a liquid pipe on the outlet side of the expansion valve (43) and a liquid pipe on the inlet side of the compressor (41). Between the gas pipe, the inlet (16) and outlet (17)
The cooling section (15) is connected to the cooling section (
By circulating the refrigerant in the refrigerant circuit in 15), the cooling section (15) acts as an evaporator to cool the main shaft (3) and the like. In addition, in the same figure,
(44) is the temperature-sensitive cylinder of the temperature-sensitive expansion valve (43); (45)
is a pressure equalizing pipe installed between the temperature-sensitive expansion valve (43) and the suction side of the compressor (41).

しかして、以上の冷却装置において、第1図で明らかに
したように、前記ハウジング(1)の内胴(11)と、
該内胴(11)内に圧入される前記モータ(2)のステ
ータ(21)に、該ステータ(21)の温度変化を検出
するクリクソンサーミスタなどの温度検出器(5)を配
設すると共に、前記冷却部(15)での冷却温度を調整
する冷却調整手段(θ)と、この冷却調整手段(6)を
、前記ステータ(21)が所定の設定温度となるように
制御する制御器(7)とを備えたのである。
Therefore, in the above cooling device, as shown in FIG. 1, the inner shell (11) of the housing (1),
The stator (21) of the motor (2) press-fitted into the inner shell (11) is provided with a temperature detector (5) such as a Clixon thermistor for detecting temperature changes in the stator (21). , a cooling adjustment means (θ) for adjusting the cooling temperature in the cooling section (15), and a controller (for controlling the cooling adjustment means (6) so that the stator (21) reaches a predetermined set temperature. 7).

第1図に示した、前記冷却調整手段(6)は紘圧機構を
構成する電動開閉弁を使用し、該開閉弁(6)を前記冷
却部(15)の出口(17)側と前記圧縮機(41)の
吸入側との間に接続して、前記冷却器(15)の出口側
冷媒を減圧して、所定の吸入圧力とし、前記冷却部(1
5)での蒸発圧力を、吸入圧力より高い圧力にすると共
に、前記開閉弁(6)を利用して、該開閉弁(6)の開
度調整により前記冷却部(15)での冷却温度を制御す
るようにしたものである。即ち、前記開閉弁(6)の開
度調整により、次のように冷却部(15)での冷却温度
の制御が行える。つまり、前記冷却部(15)側での蒸
発圧力(PE)と前記圧縮機(41)側での吸入圧(P
S)との差圧を小となるように調整するときには、該吸
入圧(PS)が高くなって前記圧縮機(41)の能力を
向上して冷媒流量が大となり、この流量増大で前記冷却
部(15)での蒸発温度を低下させ、該冷却部(15)
での冷却温度を低くすることができるのであり、また、
前記開閉弁(6)の開度調整により、前記蒸発圧力(P
E)と前記吸入圧(PS)との差圧を大となるように調
整するときには、該吸入圧(PS)が低くなって前記圧
縮機(41)の能力を低下させて冷媒流量を少なくし、
前記冷却部(15)での蒸発温度を上昇させて、該冷却
部(15)での冷却温度を上昇させることができるので
ある。
The cooling adjustment means (6) shown in FIG. 1 uses an electric on-off valve that constitutes a compressor mechanism, and connects the on-off valve (6) to the outlet (17) side of the cooling section (15) and the compressor. The cooling unit (15) is connected to the suction side of the cooling unit (41) to reduce the pressure of the refrigerant on the outlet side of the cooler (15) to a predetermined suction pressure.
The evaporation pressure in step 5) is made higher than the suction pressure, and the cooling temperature in the cooling section (15) is adjusted by adjusting the opening of the on-off valve (6). It is designed to be controlled. That is, by adjusting the opening degree of the on-off valve (6), the cooling temperature in the cooling section (15) can be controlled as follows. In other words, the evaporation pressure (PE) on the side of the cooling section (15) and the suction pressure (P) on the side of the compressor (41)
When adjusting the differential pressure with S) to be small, the suction pressure (PS) increases, improving the capacity of the compressor (41) and increasing the refrigerant flow rate, and this increase in flow rate increases the cooling The cooling section (15) reduces the evaporation temperature in the cooling section (15).
It is possible to lower the cooling temperature at
By adjusting the opening degree of the on-off valve (6), the evaporation pressure (P
When adjusting the differential pressure between E) and the suction pressure (PS) to be large, the suction pressure (PS) becomes low and the capacity of the compressor (41) is lowered to reduce the refrigerant flow rate. ,
By increasing the evaporation temperature in the cooling section (15), the cooling temperature in the cooling section (15) can be increased.

また、前記制御器(7)の入力側には、前記温度検出器
(5)と外気温度を検出するサーミスタかせら成る外気
温度検出器(8)とを設けると共に、前記冷却部(15
)の出口(17)側と、前記圧縮機(41)の吸入側と
の間に配管される冷媒回路で、前記開閉弁(6)の入口
側と出口側とには、それぞれ蒸発圧力(PE)の検出器
(91)と吸入圧(PS)の検出器(92)とを介装さ
せて、これら各検出器(91)(92)を前記制御器(
7)の入力側に接続させ、そして、該制御器(7)の出
力側を前記開閉弁(6)に接続させるのである。
Further, on the input side of the controller (7), an outside air temperature detector (8) consisting of the temperature detector (5) and a thermistor skein for detecting outside air temperature is provided, and the cooling section (15
) is a refrigerant circuit piped between the outlet (17) side of the compressor (41) and the suction side of the compressor (41). ) and a suction pressure (PS) detector (92) are interposed, and these detectors (91) and (92) are connected to the controller (
7), and the output side of the controller (7) is connected to the on-off valve (6).

しかして、旋盤などによる作業時には、前記制御器(7
)に、前記温度検出器(5)で検出される前記ステータ
(21)の温度変化と、前記外気温度検出器(8)で検
出される温度変化とが入力されると共に、これら温度変
化と前記蒸発圧力(PE)及び吸入圧(PS)の各検出
器(91)(92)により検出される蒸発圧力(PE)
及び吸入圧(PS)の検出値とに基いて前記制御器(7
)から出力される出力信号で前記開閉弁(6)が開閉制
御されて、前記冷却部(15)での冷却温度が、前記外
気温度検出器(8)で検出される外気温度に調整される
のである。従って、ステータ(21)の外気温度に対す
る温度変化を基に冷却部(15)での冷却温度が制御さ
れるから、前記主軸(3)の温度は外気温度近くに制御
されることになる。
However, when working with a lathe or the like, the controller (7)
), the temperature change of the stator (21) detected by the temperature sensor (5) and the temperature change detected by the outside air temperature sensor (8) are input, and these temperature changes and the Evaporation pressure (PE) detected by evaporation pressure (PE) and suction pressure (PS) detectors (91) (92)
and the detected value of the suction pressure (PS).
) The opening/closing valve (6) is controlled to open and close by the output signal output from the cooling section (15), and the cooling temperature in the cooling section (15) is adjusted to the outside air temperature detected by the outside air temperature detector (8). It is. Therefore, since the cooling temperature in the cooling section (15) is controlled based on the temperature change of the stator (21) with respect to the outside air temperature, the temperature of the main shaft (3) is controlled close to the outside air temperature.

所で、前記温度検出器(5)により前記ステータ(21
)の温度変化を検出する場合は、このステータ(21)
における鋼板部の温度変化を検出してもよいが、コイル
部に前記温度検出器(5)を取付けて、コイルの温度変
化を検出する方が好ましい。即ち、該ステータ(21)
のコイルは、前記ステータ(21)より主軸(3)に近
い位置に設けられる部分をもっているから、斯かるコイ
ル部分に前記温度検出器(5)を設けることにより、前
記主軸(3)に近い温度変化の検出が可能となり、この
結果、前記主軸(3)の温度をより一層外気温度に近付
けられる温度制御が可能となって、加工精度がより高め
られるのである。
By the way, the stator (21) is detected by the temperature detector (5).
), this stator (21)
Although it is possible to detect the temperature change of the steel plate section in , it is preferable to attach the temperature detector (5) to the coil section and detect the temperature change of the coil. That is, the stator (21)
Since the coil has a portion located closer to the main shaft (3) than the stator (21), by providing the temperature detector (5) in this coil portion, the temperature near the main shaft (3) can be detected. Changes can be detected, and as a result, temperature control that brings the temperature of the spindle (3) even closer to the outside temperature becomes possible, and machining accuracy is further improved.

また、以上の実施例においては、前記冷却調整手段(6
)として減圧機構を構成する電動開閉弁を利用し、該開
閉弁(6)の開閉制御により前記冷却部(15)での冷
却温度を調整するようにしたが、本発明では、開度調整
可能な前記電動開閉弁(6)に代えて、開度一定な例え
ばオリフィスを用いると共に、前記制御器(7)の入力
側に、前記温度検出器(5)と外気温度検出器(8)と
を接続し、各検出器(5)(8)からの検出結果に対応
して前記制御器(7)から出力する出力信号に基づき前
記圧縮機(41)の発停制御を行って、この発停制御に
より前記冷却部(15)での冷却温度を調整することも
可能であり、即ち、第2図に示したように、前記冷却調
整手段(6)として、前記圧縮機(41)の発停制御を
行うスイッチを使用し、このスイッチ(6)を前記制御
器(7)の出力側に接続して、前述した各入力信号に基
づく前記制御器(7)からの出力信号で前記スイッチ(
6)をオンφオフ操作して、前記圧縮機(41)を発停
制御し、この発停制御で前記冷却部(15)に冷媒を供
給したり停止することにより、前記冷却部(15)での
冷却温度を調整するのである。
Further, in the above embodiment, the cooling adjustment means (6
), the cooling temperature in the cooling section (15) is adjusted by controlling the opening and closing of the on-off valve (6) using an electric on-off valve constituting the pressure reducing mechanism, but in the present invention, the opening degree can be adjusted. Instead of the electric on-off valve (6), for example, an orifice with a constant opening degree is used, and the temperature detector (5) and the outside air temperature detector (8) are installed on the input side of the controller (7). The compressor (41) is controlled to start and stop based on the output signal output from the controller (7) in response to the detection results from each detector (5) and (8). It is also possible to adjust the cooling temperature in the cooling section (15) by control, that is, as shown in FIG. A switch for controlling is used, and this switch (6) is connected to the output side of the controller (7), so that the switch (6) is controlled by the output signal from the controller (7) based on each of the input signals described above.
6) is turned on and off to control the compressor (41) to start and stop, and this start and stop control supplies and stops the refrigerant to the cooling part (15). It adjusts the cooling temperature.

更に、前記冷却調整手段(6)としては、図示しないが
、前記圧縮機(41)の周波数を変換させる周波数変換
器を用い、この変換器で前記圧縮機(41)の周波数変
換を行うことにより、前記冷却部(15)での冷却温度
を調整するようにしてもよく、また、前記凝縮器(42
)に付設するファン(42a)の回転数を制御する回転
制御器を使用し、該回転制御器で前記ファン(42a)
の回転数を制御して、前記冷却部(15)での冷却温度
を調整することも可能である。
Further, as the cooling adjustment means (6), although not shown, a frequency converter that converts the frequency of the compressor (41) is used, and by converting the frequency of the compressor (41) with this converter, , the cooling temperature in the cooling section (15) may be adjusted;
), a rotation controller is used to control the rotation speed of the fan (42a) attached to the fan (42a).
It is also possible to adjust the cooling temperature in the cooling section (15) by controlling the rotation speed of the cooling section (15).

又、前記温度検出器(5)としてクリクソンサーミスタ
などを用いて、前記モータ(2)温度の異常高温時に、
モータ(2)保護の為に該モータ(2)を停止するよう
にしたが、温度に応した検出結果を出力する一般の温度
計を用いてもよい。
Further, by using a Clixon thermistor or the like as the temperature detector (5), when the temperature of the motor (2) is abnormally high,
Although the motor (2) is stopped to protect the motor (2), a general thermometer that outputs a detection result corresponding to the temperature may be used.

(発明の効果) 以上説明したように、本発明にかかるビルトインモータ
の冷却装置では、ハウジング(1)に内装するモータ(
2)のステータ(21)に、該ステータ(21)の温度
変化を検出する温度検出器(5)を設けると共に、前記
ハウジング(1)内に設けた冷却部(15)での冷却温
度を調整する冷却調整手段(6)と、この冷却調整手段
(6)を、前記ステータ(21)の温度が設定温度とな
るように制御する制御器(7)とを備えから、前記ハウ
ジング(1)に支持される主軸(3)の温度を外気温度
近くに冷却できて、熱膨張差を少なりシ、それだけ加工
精度を高めることができ、しかも、前記ハウジング(1
)の外表面への結露発生を確実に阻止することができる
のである。
(Effects of the Invention) As explained above, in the built-in motor cooling device according to the present invention, the motor (
2), the stator (21) is provided with a temperature detector (5) for detecting temperature changes of the stator (21), and the cooling temperature in the cooling section (15) provided in the housing (1) is adjusted. and a controller (7) that controls the cooling adjustment means (6) so that the temperature of the stator (21) becomes a set temperature. The temperature of the supported main shaft (3) can be cooled close to the outside air temperature, the difference in thermal expansion can be reduced, and the machining accuracy can be increased accordingly.
) can reliably prevent dew condensation from forming on the outer surface.

また、前記温度検出器(5)を前記ステータ(21)の
コイル温度変化を検出するように成すことにより、前記
主軸(3)の温度に一眉近い温度変化を検出できるため
、該主軸(3)の温度をより一層外気温度に近付ける温
度制御が可能となって、加工精度を一層高め得るのであ
る。
Furthermore, by configuring the temperature detector (5) to detect changes in the coil temperature of the stator (21), it is possible to detect temperature changes that are close to the temperature of the main shaft (3). ) can be controlled to bring it even closer to the outside temperature, making it possible to further improve processing accuracy.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明にかかるビルトインモータの冷却装置を
示す配管系統図、第2図は他の実施例を示す要部の配管
系統図、第3図は冷却装置の断面図、第4図は従来例を
示す断面図である。 (1)・・・・・ハウジング (11)e−・・内胴 (12)・・拳・外胴 (15)・・@−冷却部 (2)O・・・−モータ (21)・・・・ステータ (22)・・・拳ロータ (3)・・φ・ゆ主軸 (5)・・・・・温度検出器 (6)・・・壷・冷却調整手段 (7)・OΦ・・制御器 ミ ℃\
Fig. 1 is a piping system diagram showing a cooling device for a built-in motor according to the present invention, Fig. 2 is a piping system diagram of main parts showing another embodiment, Fig. 3 is a sectional view of the cooling device, and Fig. 4 is a piping system diagram showing a main part of the cooling device according to the present invention. FIG. 2 is a sectional view showing a conventional example. (1)...Housing (11)e--Inner body (12)...Fist/outer body (15)...@-Cooling part (2)O...-Motor (21)... ... Stator (22) ... Fist rotor (3) ... φ, spindle (5) ... Temperature detector (6) ... Pot, cooling adjustment means (7), OΦ ... Control Vessel ℃\

Claims (1)

【特許請求の範囲】 1)内胴(11)と外胴(12)とをもつハウジング(
1)の前記内胴(11)内にステータ(21)及びロー
タ(22)をもつモータ(2)と、該モータ(2)で駆
動される主軸(3)とを内装し、前記内胴(11)と外
胴(12)との間に冷却部(15)を設け、この冷却部
(15)を冷凍機の蒸発器として冷媒回路に介装したビ
ルトインモータの冷却装置であって、前記ステータ(2
1)に、該ステータ(21)の温度変化を検出する温度
検出器(5)を設けると共に、前記冷却部(15)での
冷却温度を調整する冷却調整手段(8)と、この冷却調
整手段(6)を、前記ステータ(21)の温度が設定温
度となるように制御する制御器(7)とを備えているこ
とを特徴とするビルトインモータの冷却装置。 2)温度検出器(5)がステータ(21)のコイル温度
の変化を検出している請求項1記載のビルトインモータ
の冷却装置。
[Claims] 1) A housing (1) having an inner shell (11) and an outer shell (12);
A motor (2) having a stator (21) and a rotor (22) and a main shaft (3) driven by the motor (2) are housed in the inner shell (11) of the inner shell (1). 11) and an outer body (12), the cooling unit (15) is interposed in a refrigerant circuit as an evaporator of a refrigerator, the cooling device for a built-in motor, (2
1) is provided with a temperature detector (5) for detecting a temperature change of the stator (21), and a cooling adjustment means (8) for adjusting the cooling temperature in the cooling section (15), and this cooling adjustment means. (6) and a controller (7) that controls the temperature of the stator (21) to a set temperature. 2) The built-in motor cooling device according to claim 1, wherein the temperature detector (5) detects a change in the coil temperature of the stator (21).
JP14969990A 1990-06-07 1990-06-07 Cooling device for built-in motor Pending JPH0441152A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14969990A JPH0441152A (en) 1990-06-07 1990-06-07 Cooling device for built-in motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14969990A JPH0441152A (en) 1990-06-07 1990-06-07 Cooling device for built-in motor

Publications (1)

Publication Number Publication Date
JPH0441152A true JPH0441152A (en) 1992-02-12

Family

ID=15480886

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14969990A Pending JPH0441152A (en) 1990-06-07 1990-06-07 Cooling device for built-in motor

Country Status (1)

Country Link
JP (1) JPH0441152A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6032489A (en) * 1997-06-05 2000-03-07 Nippon Sheet Glass Co., Ltd. Method for manufacturing tempered glass sheet and apparatus for manufacturing the same
US6079227A (en) * 1997-06-05 2000-06-27 Nippon Sheet Glass Co., Ltd. Method for manufacturing bent and tempered glass sheet and apparatus for manufacturing the same

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6032489A (en) * 1997-06-05 2000-03-07 Nippon Sheet Glass Co., Ltd. Method for manufacturing tempered glass sheet and apparatus for manufacturing the same
US6079227A (en) * 1997-06-05 2000-06-27 Nippon Sheet Glass Co., Ltd. Method for manufacturing bent and tempered glass sheet and apparatus for manufacturing the same
US6401490B1 (en) 1997-06-05 2002-06-11 Nippon Sheet Glass Co., Ltd. Method for manufacturing tempered glass sheet and apparatus for manufacturing the same

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