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1. 发明专利

JP2003307200A Centrifugal fluid machine 有权
标题翻译：离心流体机
公开(公告)号：JP2003307200A
公开(公告)日：2003-10-31
申请号：JP2003153682
申请日：2003-05-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NAGAOKA YOSHIHIRO , TANAKA TEIJI , IWASE KOJI , IDA DOSHU , ISHIMARU HIROTOSHI , IWASAKI SABURO , UEYAMA TOSHIHARU , YOSHIDA TETSUYA
IPC分类号： F04D1/08 , F04D29/22 , F04D29/24 , F04D29/42 , F04D29/44 , F04D29/66
CPC分类号： F04D29/428
摘要： PROBLEM TO BE SOLVED: To reduce noise in a diffuser with vanes or a volute casing of a centrifugal fluid machine by easing pressure pulsation and vibrating force acting on the diffuser or the volute, or by canceling the pressure pulsation and the vibrating force each other.
SOLUTION: The fluid machine comprises an impeller 3 rotating around a rotation shaft 2 inside the casing 1 and the vaned diffuser 4 of the volute 12 fixed to the casing 1. Diameters of following edge of the impeller 3 and leading edge of the diffuser 4 or a cut-off are changed to the direction of the rotation shaft center line in order to incline the following edge of the impeller 3 and the diffuser 4's leading edge or the cut-off to the same direction on a meridian plane.
COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：通过减轻作用在扩散器或蜗壳上的压力脉动和振动力，或通过消除压力脉动和振动力来减小离心式流体机械的叶片或蜗壳的扩散器中的噪声彼此。解决方案：流体机械包括围绕壳体1内的旋转轴2旋转的叶轮3和固定到壳体1的蜗壳12的带叶片扩散器4.叶轮3的后缘的边缘和扩散器4或截止孔改变为旋转轴中心线的方向，以便在子午线平面上将叶轮3的后缘和扩散器4的前缘或截止线倾斜到同一方向。版权所有（C）2004，JPO

2. 发明专利

JP2002143594A DEHYDRATING-WASHING MACHINE 失效
公开(公告)号：JP2002143594A
公开(公告)日：2002-05-21
申请号：JP2000345476
申请日：2000-11-08
申请人： HITACHI LTD
发明人： IDA DOSHU , AIDA SHUJI
IPC分类号： D06F37/24 , F16F15/03 , F16F15/04
摘要： PROBLEM TO BE SOLVED: To achieve the specified value holding of a vibration damping force extending to a long period of time for a hanging rod mechanism having a sliding damper, and an optimum lubrication retention extending to a long period of time at a low cost, and provide a compact washing machine of a large capacity having a favorable usability and low noises. SOLUTION: As a means to keep a required pressing force uniform regardless of wear, the required pressing force is ensured by an attracting force with a magnetic force. In this case, the hanging rod is constituted of a magnetic body, and a sliding member is constituted of an elastic body containing a magnetic powder, which is divided into a plurality in the hanging rod axial direction.

3. 发明专利

JP2001321593A DEHYDRATING WASHING MACHINE 失效
公开(公告)号：JP2001321593A
公开(公告)日：2001-11-20
申请号：JP2000148573
申请日：2000-05-16
申请人： HITACHI LTD
发明人： AIDA SHUJI , IDA DOSHU
IPC分类号： D06F37/24 , F16F13/00 , F16F15/04 , F16F15/06 , F16F15/067
摘要： PROBLEM TO BE SOLVED: To provide a vibration control mechanism especially suitable for maintaining stable performance for a dehydrating washing machine in which an outer tub, etc., are suspension-supported by the vibration control mechanism. SOLUTION: This dehydrating washing machine is equipped with a vibration control mechanism 2 to suspension-support an outer tub 3 to an outer frame 1. The vibration control mechanism 2 is constituted of a cap 24 fit to the lower part of a cylindrical body 16, lubricating oil 29 enclosed inside the cylindrical body 16, spaces separated up and down by a slide member 23, and a passage through which the lubricating oil 29 can move between the upper and the lower spaces so that the lubricating oil 29 can drop from around the upper part of the cylindrical body 16.

4. 发明专利

JPH10151295A ELECTRIC WASHING MACHINE 失效
公开(公告)号：JPH10151295A
公开(公告)日：1998-06-09
申请号：JP31335496
申请日：1996-11-25
申请人： HITACHI LTD
发明人： IDA DOSHU , TAKAGI YUKISHI
IPC分类号： D06F37/24 , D06F49/06 , F16F13/02
摘要： PROBLEM TO BE SOLVED: To reduce the resonance amplitude of a specified oscillation mode and to reduce the size by changing the configuration of a hanging bar mechanism of a full automatic washing machine. SOLUTION: This dewatering/washing machine is provided with a balance body 12 as a hollow circular body containing fluid at its top end opening part and bottom part, an inner drum 5 containing an agitator blade at its bottom center, an outer drum 3 which connects an attaching plate 9 at its bottom to which a motor 8, clutch 7, and a belt drive transmission system are attached, and the outer drum 3 connects and contains the inner drum 5 through the clutch 7 and a flange 6, and an outer frame 1 supporting the outer drum 3 through the hanging bar, and the dewatering/washing machine performs both washing and dewatering at the inner drum 5. The hanging bar 2 mechanism contains at least one spring and a vibration absorber consisting of at least one weight and an attenuator.

5. 发明专利

JPH10112959A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPH10112959A
公开(公告)日：1998-04-28
申请号：JP26275296
申请日：1996-10-03
申请人： HITACHI LTD
发明人： MATSUBARA KENICHIRO , IDA DOSHU
IPC分类号： F04D29/34 , H02K5/24 , H02K9/06
摘要： PROBLEM TO BE SOLVED: To minimize the magnetic sound radiated from a cooling fan even if a cooling fan vibrates with the vibration of a rotary shaft by electromagnetic force waves, by plural sheets of vanes of the cooling fan with one another in circumferential direction, using coupling member. SOLUTION: The heat generated in a stator 4 occupies the greater part of the heat generated in a rotating electric machine 1, and most of this heat is conducted to a housing 6 and further to the cooling fan 8 installed at the periphery of the housing 6, and here it is conducted to the outside air. It follows that the rotating electric machine 1 is cooled by this serial heat conduction, but sufficient cooling is difficult with only this, so the cooling fan 10 is coupled with a rotary shaft 2, and cooling air relatively low in temperature generated by that rotation is sent in compulsively between the cooling fans 8 so as to accelerate the cooling. In this case, a plurality of vanes 11 arranged in radial form of the cooling fan 10 are coupled with one another, using as many coupling members as it, thus the area in axial view of the cooling fan 10 is minimized.

6. 发明专利

JPH08117480A DEWATERING WASHING MACHINE 失效
公开(公告)号：JPH08117480A
公开(公告)日：1996-05-14
申请号：JP25589194
申请日：1994-10-21
申请人： HITACHI LTD
发明人： IDA DOSHU , TANAKA KIHACHIRO , AIDA SHUJI , SHIKAMORI TAMOTSU , OSUGI HIROSHI
IPC分类号： D06F37/24 , F16F7/00
摘要： PURPOSE: To effectively reduce the vibration amplitude of an external tank in dewatering operation. CONSTITUTION: Suspension rods 5-8 for suspending the external tank 4 are provided with conversion levers 10-13 which face the outer periphery of the external tank 4, whose vibratory displacement is made to operate on the conversion levers 10-13; and then a pressing force in a 90 deg. phase advance angle direction is made to operate on the external tank 4, thereby obtaining vibration damping operation.

7. 发明专利

JPH0893693A TURBO-FLUID MACHINE 失效
公开(公告)号：JPH0893693A
公开(公告)日：1996-04-09
申请号：JP22477394
申请日：1994-09-20
申请人： HITACHI LTD , HITACHI TECHNO ENG
发明人： UEYAMA TOSHIHARU , TAKAGI YUKISHI , TAKANO YASUSHI , IWASE KOJI , IDA DOSHU , TANAKA TEIJI , NAGAOKA YOSHIHIRO , YOSHIDA TETSUYA
IPC分类号： F04D29/44 , F04D29/66
摘要： PURPOSE: To reduce radiation sounds from a body surface, piping, cover or the like by constructing integrally a diffuser side plate, diffuser blade and backboard blade, providing separately a stage and transmitting a vibrational force from the diffuser blade and backboard blade through a fitting part of the diffuser side plate and stage to the stage without transmitting the vibrational force directly to the stage. CONSTITUTION: A casing 5 receives a blade 4a of a diffuser 4, side plates 4b and back board blade 2 of both sides thereof made integrally and an annular stage 3 separately attached, so that the fitting part of the casing and stage through which a vibrational force is transmitted is reduced to a portion of the diffuser side plate 4b and stage 3. While the vibrating force of fluid discharged from a blade 7a of an impeller 7 to act on the blade 4a of the diffuser 4 is transmitted from the diffuser side plate 4b to the stage 3, the vibrational force is damped at the fitting part. Thus, the fluid performance is not little affected and radiation sounds from the body surface, piping, coupling cover or the like of a turbo-fluid machine body can be economically effectively reduced.

8. 发明专利

JPH07154940A ROTATING ELECTRIC MACHINE 失效
公开(公告)号：JPH07154940A
公开(公告)日：1995-06-16
申请号：JP29625593
申请日：1993-11-26
申请人： HITACHI LTD
发明人： SHINSHI TADAHIKO , IDA DOSHU , MATSUBARA KENICHIRO , TANAKA KIHACHIRO , YONAMINE MISAO
IPC分类号： H02K5/18 , H02K5/24
摘要： PURPOSE:To prevent vibration and noise due to resonance according to usage conditions by a method wherein various streamlined mass bodies are installed between fixed fins at a stator frame for a rotating electric machine in such a way that they can be attached and detached in the direction of a shaft. CONSTITUTION:An induction motor 1 is constituted of a stator frame 2, an end bracket 3, a rotor shaft 4 and support legs 5. The outer circumferential face of the stator frame 2 is provided with a plurality of cooling fins 6 in the direction of a shaft. A plurality of freely detachable streamlined mass bodies 7 are attached between the cooling fins 6 by means of mounting screw holes 8 so as to be directed to the direction of the shaft. As the mass bodies 7, optimum mass bodies are selected according to operating conditions out of those whose mass and shape are varied. Thereby, the natural frequency of a rotating electric machine can be changed easily, vibration and 4 noise due to resonance are reduced, and the cooling of the rotating electric machine can be enhanced.

9. 发明专利

JPH04165118A DAMPER BEARING 失效
公开(公告)号：JPH04165118A
公开(公告)日：1992-06-10
申请号：JP28702190
申请日：1990-10-26
申请人： HITACHI LTD
发明人： IDA DOSHU , MATSUSHITA OSAMI
IPC分类号： F16C27/00 , F16F15/00 , H01L41/09
摘要： PURPOSE:To actively control vibration through nonlubricated simple structure by giving vibration to a spring to support a bearing, severally sticking piezo-elec tric ceramics plates to both the sides of the spring to form electrodes on the surfaces of the above plate, and connecting the electrodes to a resistance to form a circuit for converting the vibration into electricity. CONSTITUTION:A plate spring 3 is given vibration through a bearing 2 to support a rotary shaft 1, and piezo-electric ceramics plates 5 are severally stuck to both the faces of a square section-shaped rib 4 composing the spring 3. An electrode is formed on the surface of the plate 5, and as the one side of the plate 5 elongates, its opposite side contracts to make piezo electric effect generate positive and negative voltages in the electrodes on the plate 5 according to the elongation and contraction of the plate 5. Potential difference therefore occurs between the two electrodes to flow electric current through a resistance 6 connected between the electrodes to generate heat in the resistance 6. Thus vibrational energy is converted into electrical energy and then thermal energy to generate damping effect for producing a nonlubricated damper bearing.

10. 发明专利

JPH01275909A HIGH SPEED ROTATING DEVICE 失效
公开(公告)号：JPH01275909A
公开(公告)日：1989-11-06
申请号：JP10393288
申请日：1988-04-28
申请人： HITACHI LTD
发明人： SAITOU IKUHIRO , MATSUSHITA OSAMI , TAKAGI TEISHI , IDA DOSHU , YONEYAMA MITSUO
IPC分类号： G01M99/00 , F16C32/00 , G01N3/32
摘要： PURPOSE:To reduce vibratory amplitude by controlling the supply of electric current to an electromagnetic coil which holds a rotor in a set position by means of a control circuit of a servo circuit of X and Y two channels and a channel cross circuit for low path filter signals. CONSTITUTION:Each displacement of a rotor 1 in X and Y directions is detected with a displacement sensor 2, and respective displacement signals x and y are put into control circuits 5x and 5y in X and Y directions. Results of calculation are put through a power amplifier 4 into an electromagnetic coil 3 which holds the rotor 1 in a set position. Further, displacement signals x and y are put into a low path filter 6, and as for extracted low frequency constituents and y2, x2 is subtracted from y and y2 is added to x by a cross circuit so that improvement is made for attenuation force against swinging vibration caused in a rotary machine and its amplitude can be suppressed to a small value.

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