会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 76. 发明专利
    • RUNNER FOR FRANCIS TYPE HYDRAULIC MACHINERY
    • JPH11257199A
    • 1999-09-21
    • JP622199
    • 1999-01-13
    • VOITH HYDRO GMBH & CO KG
    • NEIDHARDT THOMAS
    • F03B3/02F03B3/12
    • PROBLEM TO BE SOLVED: To make strength at an easily damageable specific spot sufficiently durable to service life without entailing damage to the optimum form by enlarging each blade through a small surface additional blade part facing to the downstream direction at an exit edge area and a connecting area with a runner bottom part. SOLUTION: A runner is equipped with a runner bottom part 1.1, a runner rim 1.2 and a plurality of blades 1.3. An exit edge 1.3.2 of this blade 1.3 is provided with a large additional blade part 1.3.3 overhanging from a circular curve. Therefore, this exit edge 1.3.2 with a continuous line is biased at a constant distance from the runner bottom part 1.1, and there by a terminal part of the exit edge 1.3.2 is intersected with the runner bottom part 1.1. at a point B. In other works, this point B is situated at the more downstream side than in the normal case. Therefore, a load reducing blade part increases the rigidity of the blade, and a structural stress to be produced in a connecting part is shifted to a surface area of the additional blade part 1.3.3, and then a stress level is lowered.
    • 79. 发明专利
    • PUMP AND REVERSIBLE PUMP-TURBINE
    • JPH1130178A
    • 1999-02-02
    • JP18345597
    • 1997-07-09
    • HITACHI LTD
    • IWANO RYUICHIRO
    • F03B3/10F03B3/12
    • PROBLEM TO BE SOLVED: To dissolve a right-up characteristic of a Q-H curve and improve stability during operation of a low flow pump by providing blades arranged at unequal spaces in a circumferential direction to constitute an impeller of hydraulic machinery so as to differentiate the flow quantity generating contraflow between the respective blades. SOLUTION: In case of using an impeller 1 with six blades in a hydraulic machinery with the pumping action of a pump, a reversible pump-turbine, or the like, passages between the respective blades 2 are so formed that circumferential spaces are gradually enlarged from a part 3a to a part 3f. The flow characteristics of the passages between the respective blades 2 are therefore made different so as to obtain characteristics with different Q-H curves between the respective blades. Since the whole Q-H curve of the impeller 1 is the averaged Q-H curve of a plurality of different Q-H curves, the right-up characteristic of the Q-H curve is dissolved, and stability of operation is improved.