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1. 发明专利

JPS5572965A EXHAUST VALVE FOR COMPRESSOR 失效
公开(公告)号：JPS5572965A
公开(公告)日：1980-06-02
申请号：JP14476278
申请日：1978-11-22
申请人： EBARA MFG
发明人： NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F16K15/16 , F16K15/14
摘要： PURPOSE:To provide an exhaust valve having small size, light weight and high reliability by inserting a cylindrical valve body including a plurality of passage slots into an exhaust valve chamber and arranging a lead valve including a passage slot not superimposed with the passage slots in the valve body. CONSTITUTION:The port hole 23 of an exhaust valve is axially formed at part of the casing 22 of a rotary piston compressor to communicate through a passage 24 with a space 22a. In this case, an auxiliary passage 24' is formed at the passage 24 to communicate with a number of passage slots 32 of a lead valve 27 to thereby form as large compressed fluid passage area as possible. A cylindrical valve body 25 formed with a plurality of passage slots 26 is inserted into the port hole 23. The lead valve 27 is so fixed into the valve body 25 in a cantilever shape as to restrict the maximum opening thereof by a stopper 28. In this case, the lead valve 27 is so mounted that the slots 32 are alternatively arranged not to superimpose with the slots 26 of the valve body 25.

2. 发明专利

JPS6367036B2 失效
公开(公告)号：JPS6367036B2
公开(公告)日：1988-12-22
申请号：JP8372080
申请日：1980-06-20
申请人： EBARA MFG
发明人： YUASA TATSUJI , NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F04C18/10 , F04C18/12

3. 发明专利

JPS58124859A OIL SUPPLY DEVICE 失效
公开(公告)号：JPS58124859A
公开(公告)日：1983-07-25
申请号：JP525182
申请日：1982-01-16
申请人： EBARA MFG
发明人： MIYAGAWA SHINPEI , KANEHARA MASAAKI
IPC分类号： F15B11/028 , F16H61/40 , F16H61/452 , G05D16/10 , F16H39/50
摘要： PURPOSE:To improve the response of a captioned device by conducting a pilot tube from a header part to a servo-valve in a back pressure control valve together with conducting pressure oil to the back pressure control valve through a pipeline from a pressure source to a header for releasing the pressure oil to an oil tank. CONSTITUTION:A pipe 23 to release oil is branched off from a pipe 9 connecting an oil pump 1 and an auxiliary oil pump 2 to a header 3. A released quantity of pressure oil is regulated to flow into a tank 4 via a throttle valve 2 of an oil- pressure-pilot type back pressure control valve 24 consisting of a servo-valve 25 and a throttle valve 26 of a type of a spool valve operated by an oil pressure cylinder. The pressure oil of the header 3 is led to the servo-valve 25 via a pilot tube 27, and regulated in its quantity of release depending on the pressure of the header 3.

4. 发明专利

JPS58124801A PRESSURE CONTROL VALVE 失效
公开(公告)号：JPS58124801A
公开(公告)日：1983-07-25
申请号：JP525282
申请日：1982-01-16
申请人： EBARA MFG
发明人： MIYAGAWA SHINPEI , KANEHARA MASAAKI
IPC分类号： F16K31/12 , F15B9/08
摘要： PURPOSE:To prevent lowering in responsibility of a pressure control valve by coupling a hydraulic cylinder to a driving oil pressure source through a servo valve. CONSTITUTION:A port P of a servo valve is coupled to an oil pressure source. A port T of the servo valve is coupled in such a manner as to return to the oil pressure source. A port PIL of a coupling 12 of the servo valve is coupled to the oil pressure output for obtaining constant pressure. A port P1 of a throttle valve is coupled to a pipe for supplying pressure oil to a header of the oil pressure output for obtaining constant pressure. A port T1 is coupled to a part connected to an oil reservoir of the pressure oil supply source so as to eliminate an offset and prevent lowering in responsibility of the pressure control valve.

5. 发明专利

JPS56141005A PISTON MACHINERY 失效
公开(公告)号：JPS56141005A
公开(公告)日：1981-11-04
申请号：JP4428180
申请日：1980-04-04
申请人： EBARA MFG
发明人： YUASA TATSUJI , NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F04C18/10 , F01C1/10 , F04C2/10 , F04C2/356
摘要： PURPOSE:To evade the overloading of drive shaft and the like by a construction wherein the pitch radii and eccentricities of the eccentric shaft gear fixed to the working member interlinking with a piston and the eccentric gear engaging with the gear are respectively equalized and at the same time the rotational frequencies and phases of the eccentric gear and an eccentric shaft are synchronized. CONSTITUTION:There is provided the drive shaft 1 having an eccentric shaft 2 with eccentricity E and, about the center 2' of the shaft 2, a piston 4 is rotatably arranged. Further a rotary shaft gear 212, having a pitch radius (a), provided on the shaft 1 and a fixed shaft gear 222, having a pitch radius (b), provided on a fixed shaft 221 are brought into engagement through an intermediate gear 215. The eccentric gear 223, having a pitch radius (c), relatively fixed to the gear 222 is equipped so as to locate its center eccentric to the shaft 221 by eccentricity E' and circumscribed with the eccentric shaft gear 220, having a pitch radius (d), relatively fixed to the piston 4 and rotatably about the center 2'. In this case, the eccentric directions of the shaft 2 and gear 223 are arranged as a same direction and at the same time pitch radii and eccentricities are determined due to the relations, a=b, c=d, E=E'. Less massive eccentric parts are resulted and the loverloading of the shaft and the like is evaded.

6. 发明专利

JPS6139542B2 失效
公开(公告)号：JPS6139542B2
公开(公告)日：1986-09-04
申请号：JP525182
申请日：1982-01-16
申请人： EBARA MFG
发明人： MYAGAWA SHINPEI , KANEHARA MASAAKI
IPC分类号： F15B11/028 , F16H61/40 , F16H61/452 , G05D16/10
摘要： PURPOSE:To improve the response of a captioned device by conducting a pilot tube from a header part to a servo-valve in a back pressure control valve together with conducting pressure oil to the back pressure control valve through a pipeline from a pressure source to a header for releasing the pressure oil to an oil tank. CONSTITUTION:A pipe 23 to release oil is branched off from a pipe 9 connecting an oil pump 1 and an auxiliary oil pump 2 to a header 3. A released quantity of pressure oil is regulated to flow into a tank 4 via a throttle valve 2 of an oil- pressure-pilot type back pressure control valve 24 consisting of a servo-valve 25 and a throttle valve 26 of a type of a spool valve operated by an oil pressure cylinder. The pressure oil of the header 3 is led to the servo-valve 25 via a pilot tube 27, and regulated in its quantity of release depending on the pressure of the header 3.

7. 发明专利

JPS56141003A PISTON MACHINERY 失效
公开(公告)号：JPS56141003A
公开(公告)日：1981-11-04
申请号：JP4397880
申请日：1980-04-03
申请人： EBARA MFG
发明人： YUASA TATSUJI , NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F04C18/10 , F01C1/10 , F04C2/10 , F04C2/356
摘要： PURPOSE:To evade the eccentric rotation of gear train and reduce the unbalance due to centrifugal force by a method wherein planetary gears with specified dimensional ratio are employed in the piston machinery with an eccentric shaft such as a compressor or the like. CONSTITUTION:There is provided a drive shaft 1 having in its part an eccentric shaft 2 with eccentricity E and, about the center 2' of the shaft 2, a piston 4 is rotatably arranged within a casing 8. The space between the casing 8 and the piston 4 is divided in two working chambers 20 and 20' by seal pieces 16 and 16'. A gear 212, having a pitch redius (a), secured on the shaft 1 is provided being circumscribed with intermediate gears 215 and 216. The first internal gear 217, having a pitch radius (b), rotatably supported on the shaft 1 is also provided being inscribed with the gears 215 and 216. Further, the gear 217, which is relatively secured to the second internal gear 218, is relatively fixed to the piston 4 and inscribed with an eccentric shaft gear 220, having a pitch radius (f), rotatably supported on the shaft 2. In these gear arrangements, when the dimensions of gears are determined due to the relation f=E.(b+a)/(b-a), the massive parts such as internal gears and the like are not in eccentric to the shaft 1, meeting the expected object.

8. 发明专利

JPS56138487A ROTARY PISTON MACHINE 失效
公开(公告)号：JPS56138487A
公开(公告)日：1981-10-29
申请号：JP4000880
申请日：1980-03-28
申请人： EBARA MFG
发明人： YUASA TATSUJI , NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F04C18/10
摘要： PURPOSE:To prevent a trouble caused by a deflecting rotary motion of a rotary piston and to allow a smooth operation, by projecting a bearing ring between two seals concentrically installed near the periphery of the end surface of a rotary piston. CONSTITUTION:Two seals 24 and 24' are concentrically installed near the periphery of the sides of a rotary piston 4, and are lubricated by feeding oil through an opening 235. The space between the seals 24 and 24' is provided with a bearing ring 232 as a circular member. A bearing surface 233, which is the end surface of a bearing ring 232, is slightly projected from the end surface of a rotary piston 4. The size of projection is so determined that it may not touch a part near the periphery, even when the rotary piston 4 is slanted by a deflecting rotary motion. With this construction, the surface of the bearing ring 232 is constantly covered with an oil film. This construction also prevents a trouble caused by the deflecting rotary motion of the rotary piston 4 and offers a smooth operation.

9. 发明专利

JPS56138402A SEALING DEVICE FOR ROTARY PISTON MACHINE 失效
公开(公告)号：JPS56138402A
公开(公告)日：1981-10-29
申请号：JP4127580
申请日：1980-03-31
申请人： EBARA MFG
发明人： YUASA TATSUJI , NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F01C1/10 , F01C19/02
摘要： PURPOSE:To optimize sealing pressure, by providing two kinds of back pressure chambers in a sealing device which divides into two operation openings the opening between a rotary piston rotatably supported on an eccentric shaft and a casing for the piston and by connecting the back pressure chamber to the operation openings. CONSTITUTION:Back pressure chambers 225, 226, 227, which are separated from each other, are defined between a back pressure member 224 energized by a spring 18 and the seal 16 of a sealing device which defines two operation openings 20, 20' between a rotary piston 4 rotatably supported on an eccentric shaft and a casing 8 for the piston 4. The back pressure chamber 225 is connected to the operation opening 20' through a communication passage 231 and the other back pressure chambers 226, 227 are connected to the operation opening 20 through communication passages 229, 230. As a result, the change in the thrusting force of the seal 16 based on back pressure can be approximated to a shoving force based on working gas. Minimum sealing pressure can thus be assured.

10. 发明专利

JPS5710789A ROTARY PISTON MACHINE 失效
公开(公告)号：JPS5710789A
公开(公告)日：1982-01-20
申请号：JP8372080
申请日：1980-06-20
申请人： EBARA MFG
发明人： YUASA TATSUJI , NAKANISHI MINORU , KANEHARA MASAAKI
IPC分类号： F04C18/10 , F04C18/12
摘要： PURPOSE:To reduce kneading and twisting motions of a piston and ensure its smooth movement, by performing rotating and orbital motions reversely to each other of the rotary piston, providing inner driving gears in the inside of the rotary piston and allowing a point of action to approximate the center of the rotary piston. CONSTITUTION:A rotary piston 4 is rotatably held around an eccentric shaft 2 of a drive shaft, in the inside of which an inner gear 281 rotating around the center 2' of the eccentric shaft 2 is equipped. When the drive shaft 1 is rotated clockwise, a rotary shaft gear 212 is rotated clockwise while fixed shaft gears 277, 278 are rotated counter clockwise. Accordingly, an intermediate gear 215 is rotated around a center shaft 213 clockwise. In this way, pinions 279, 280, that is, the rotary piston 4 is rotated counter clockwise around the center 2' of the eccentric shaft 2. Further the rotary piston 4 performs orbital motion clockwise on the circumference of radius E.

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