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1. 发明授权

EP1261803B1 LEAKAGE OIL RETURN APPARATUS FOR A HYDRAULIC MOTOR 有权
标题翻译：反馈装置用于漏极的液压引擎
公开(公告)号：EP1261803B1
公开(公告)日：2004-06-30
申请号：EP01913914.6
申请日：2001-02-28
申请人： Ideachip Oy
发明人： JONNINEN, Markku
IPC分类号： F03C1/40
CPC分类号： F03C1/0431 , F04B53/04
摘要： The invention relates to a leakage oil return apparatus for a hydraulic motor. The apparatus is used for returning the oil leaked from the working pressure space of a motor (1) into a motor casing (12) from the casing (12) back to a return line (2) of the motor. Consequently, the return pump (5) driven by a shaft (3) of the hydraulic motor (1) has its suction side (7) connected with said casing (12) and its delivery side (6) conencted by way of non-return valves (4) with pressure and return lines (2) of the motor (1) in such a way that flow communication is established always with the line having a lower pressure. It is preferred that the return pump (5) have its delivery side (6) connected by way of a pressure proportional valve (8) with said casing (12). The pressure proportional valve (8) is adapted to receive its control from the pressure ratio between a casing pressure and a pressure in the delivery side (6) of the return pump (5) in such a way that, as the casing pressure goes down below a given pressure limit or approaches the pressure of 0 bar, the pressure proportional valve (8) switches the return pump's (5) volume flow to free circulation i.e. back to the casing (12).

2. 发明公开

EP1261803A1 LEAKAGE OIL RETURN APPARATUS FOR A HYDRAULIC MOTOR 有权
标题翻译：反馈装置用于漏极的液压引擎
公开(公告)号：EP1261803A1
公开(公告)日：2002-12-04
申请号：EP01913914.6
申请日：2001-02-28
申请人： Ideachip OY Insinööritoimisto
发明人： JONNINEN, Markku
IPC分类号： F03C1/40
CPC分类号： F03C1/0431 , F04B53/04
摘要： The invention relates to a leakage oil return apparatus for a hydraulic motor. The apparatus is used for returning the oil leaked from the working pressure space of a motor (1) into a motor casing (12) from the casing (12) back to a return line (2) of the motor. Consequently, the return pump (5) driven by a shaft (3) of the hydraulic motor (1) has its suction side (7) connected with said casing (12) and its delivery side (6) conencted by way of non-return valves (4) with pressure and return lines (2) of the motor (1) in such a way that flow communication is established always with the line having a lower pressure. It is preferred that the return pump (5) have its delivery side (6) connected by way of a pressure proportional valve (8) with said casing (12). The pressure proportional valve (8) is adapted to receive its control from the pressure ratio between a casing pressure and a pressure in the delivery side (6) of the return pump (5) in such a way that, as the casing pressure goes down below a given pressure limit or approaches the pressure of 0 bar, the pressure proportional valve (8) switches the return pump"s (5) volume flow to free circulation i.e. back to the casing (12).

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