意志由来画不成,当时枉杀毛延寿。—— 王安石《明妃曲二首》
PV2R2-59-F-LAA-41油研高压叶片泵
油研 液压设备 YUKEN 液压泵 单级叶片泵 高性能泵 单泵 双联泵
PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41单泵
PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41单泵
Yuken Oil Hydraulic Equipment
油研液压设备
Hydraulic Pumps
液压泵
VANE PUMPS
叶片泵 定量泵
- 单泵
  50T,150T
- PV2R型单泵
  PV2R1,PV2R2,PV2R3,PV2R4
- PV2R4A型单泵
  PV2R4A
- PV2R型双联泵
  小流量(PV2R1)(PV2R2)(PV2R3)
  大流量(PV2R2)(PV2R3)(PV2R4)
- PV2R24A/34A型双联泵
  小流量(PV2R2)(PV2R3)
  大流量(PV2R4A)
PV2R型单泵
- 本型泵专为低噪声而开发的高压、高性能泵。
- 为对应注塑成型机等广泛用途。
  本型泵具有5.8-237cm2/rev极宽的流量范围。
  另外,泵内脏组成组件,利于维修。
- PV2R1型单叶片泵
  PV2R1-*-*-RAA-43
- PV2R2型单叶片泵
  PV2R2-*-*-RAA-41
- PV2R3型单叶片泵
  PV2R3-*-*-RAA-31
- PV2R12型双联叶片泵
  PV2R12-*-*-*-REAA-43
- PV2R13型双联叶片泵
  PV2R13-*-*-*-RAAA-43
- PV2R14型双联叶片泵
  PV2R14-*-*-*-RAAA-33
- PV2R23型双联叶片泵
  PV2R23-*-*-*-REAA-41
- PV2R33型双联叶片泵
  PV2R33-*-*-*-RAAA-31
- PV2R24型双联叶片泵
  PV2R24-*-*-*-RAAA-31
- PV2R34型双联叶片泵
  PV2R34-*-*-*-REAA-31
PV2R型单泵
- 本型泵专为低噪声而开发的高压、高性能泵。
- 为对应注塑成型机等广泛用途。
  本型泵具有5.8-237cm2/rev极宽的流量范围。
  另外,泵内脏组成组件,利于维修。
PV2R4A型单泵
- 结合省空间的需要,新开发的节能、高压、高性能的泵。
- 作为低噪声叶片泵比定评的PV2R4型更小型化。
PV2R型双联泵
- 本型泵由同一轴驱动的两个PV2R型单泵并联组装在同一壳体内而成。
- 输出流量可以输向两个独立的回路。
PV2R24A/34A型双联泵
- 本泵是在PV2R4A的基础上新开发的双联泵。
- 输出流量可以输向两个单独的回路。
油研 液压设备 YUKEN 液压泵 单级叶片泵 高性能泵 单泵 双联泵
PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41单泵
PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41 PV2R2-59-F-LAA-41单泵
供应商信息:上海心雨机电设备有限公司
Attn:闫菲18717727482
Email:395717253@
Tel:021-60510250
Fax:021-55032832
Q扣扣Q:395717253
看似寻常 奇崛,成如容易却艰辛。—— 王安石《题张司业诗》
PV2R2-59-F-LAA-41油研高压叶片泵
油研 液压设备 YUKEN 液压泵 单级叶片泵 高性能泵 单泵 双联泵 定量泵 定量叶片泵
Yuken Oil Hydraulic Equipment
油研液压设备
Hydraulic Pumps
液压泵
VANE PUMPS
叶片泵 定量泵
PV2R型单泵
型号说明
"PV2R1-6-L-RAA-43"
"PV2R2"--系列号:
  PV2R1,PV2R2,PV2R3,PV2R4
"6"--公称排量cm3/rev:
  PV2R1:6、8、10、12、14、17、19、23、25、31
  PV2R2:41、47、53、59、65
  PV2R3:76、94、116
  PV2R4:136、153、184、200、237
"L"--安装型式:
  L = 底座安装型
  F = 法兰安装型
"R"--旋转方向(从轴伸端看):
  R = 顺时针方向(标准)
  可提供逆时针转向的泵
"A"--输出口位置(从轴伸端看):
  A = 上(标准)
"A"--吸入口位置(从轴伸端看):
  A = 上(标准)
"43"--设计号:
  PV2R1:43
  PV2R2:41
  PV2R3:31
  PV2R4:30

YUKEN油研液压泵
单级叶片泵
PV2R型单泵
型号列举
PV2R1-6-F-RAA-43
PV2R1-8-F-RAA-43
PV2R1-10-F-RAA-43
PV2R1-12-F-RAA-43
PV2R1-14-F-RAA-43
PV2R1-17-F-RAA-43
PV2R1-19-F-RAA-43
PV2R1-23-F-RAA-43
PV2R1-25-F-RAA-43
PV2R1-31-F-RAA-43

PV2R2-41-F-RAA-41
PV2R2-47-F-RAA-41
PV2R2-53-F-RAA-41
PV2R2-59-F-RAA-41
PV2R2-65-F-RAA-41

PV2R3-76-F-RAA-31
PV2R3-94-F-RAA-31
PV2R3-116-F-RAA-31

PV2R4-136-F-RAA-30
PV2R4-153-F-RAA-30
PV2R4-184-F-RAA-30
PV2R4-200-F-RAA-30
PV2R4-237-F-RAA-30

YUKEN台湾油研
PV2R2型单级叶片泵
- 特为低噪音而研制的高压、高性能泵。
- 为适应塑料机等广泛用途,具有5.8~237cm3/rev的排量范围。
- 内藏零件用螺丝组装成整体件,便于装配与维修。
PV2R2-53-*-***-41
- 理论排量:52.5cm3/rev
-  工作压力:21MPa(210kgf/cm2)
- 转速范围:600 - 1800r/min
- 重量:
  法兰安装:19.0kg
  脚架安装:23.3kg
PV2R2型单级叶片泵
PV2R2-26-F-RAA-41
PV2R2-33-F-RAA-41
PV2R2-41-F-RAA-41
PV2R2-47-F-RAA-41
PV2R2-53-F-RAA-41
PV2R2-59-F-RAA-41
PV2R2-65-F-RAA-41
PV2R2-75-F-RAA-41
PV2R2-26-F-LAA-41
PV2R2-33-F-LAA-41
PV2R2-41-F-LAA-41
PV2R2-47-F-LAA-41
PV2R2-53-F-LAA-41
PV2R2-59-F-LAA-41
PV2R2-65-F-LAA-41
PV2R2-75-F-LAA-41
PV2R2-26-L-RAA-41
PV2R2-33-L-RAA-41
PV2R2-41-L-RAA-41
PV2R2-47-L-RAA-41
PV2R2-53-L-RAA-41
PV2R2-59-L-RAA-41
PV2R2-65-L-RAA-41
PV2R2-75-L-RAA-41
PV2R2-26-L-LAA-41
PV2R2-33-L-LAA-41
PV2R2-41-L-LAA-41
PV2R2-47-L-LAA-41
PV2R2-53-L-LAA-41
PV2R2-59-L-LAA-41
PV2R2-65-L-LAA-41
PV2R2-75-L-LAA-41
……
欲把西湖比西子,淡妆浓抹总相宜。—— 苏轼《饮湖上初晴后雨》
PV2R2-59-F-LAA-41油研高压叶片泵
油研 液压设备 YUKEN 液压泵 单级叶片泵 高性能泵 单泵 双联泵 定量泵 定量叶片泵
Yuken Oil Hydraulic Equipment
油研液压设备
Hydraulic Pumps
液压泵
VANE PUMPS
叶片泵 定量泵
本型泵专为低噪声而发开的高压、高性能泵。
PV2R1型单级叶片泵
PV2R1-6-F-RAA-43
PV2R1-8-F-RAA-43
PV2R1-10-F-RAA-43
PV2R1-12-F-RAA-43
PV2R1-14-F-RAA-43
PV2R1-17-F-RAA-43
PV2R1-19-F-RAA-43
PV2R1-23-F-RAA-43
PV2R1-25-F-RAA-43
PV2R1-31-F-RAA-43
PV2R1-6-F-LAA-43
PV2R1-8-F-LAA-43
PV2R1-10-F-LAA-43
PV2R1-12-F-LAA-43
PV2R1-14-F-LAA-43
PV2R1-17-F-LAA-43
PV2R1-19-F-LAA-43
PV2R1-23-F-LAA-43
PV2R1-25-F-LAA-43
PV2R1-31-F-LAA-43
PV2R1-6-L-RAA-43
PV2R1-8-L-RAA-43
PV2R1-10-L-RAA-43
PV2R1-12-L-RAA-43
PV2R1-14-L-RAA-43
PV2R1-17-L-RAA-43
PV2R1-19-L-RAA-43
PV2R1-23-L-RAA-43
PV2R1-25-L-RAA-43
PV2R1-31-L-RAA-43
PV2R1-6-L-LAA-43
PV2R1-8-L-LAA-43
PV2R1-10-L-LAA-43
PV2R1-12-L-LAA-43
PV2R1-14-L-LAA-43
PV2R1-17-L-LAA-43
PV2R1-19-L-LAA-43
PV2R1-23-L-LAA-43
PV2R1-25-L-LAA-43
PV2R1-31-L-LAA-43

PV2R2型单级叶片泵
PV2R2-26-F-RAA-41
PV2R2-33-F-RAA-41
PV2R2-41-F-RAA-41
PV2R2-47-F-RAA-41
PV2R2-53-F-RAA-41
PV2R2-59-F-RAA-41
PV2R2-65-F-RAA-41
PV2R2-75-F-RAA-41
PV2R2-26-F-LAA-41
PV2R2-33-F-LAA-41
PV2R2-41-F-LAA-41
PV2R2-47-F-LAA-41
PV2R2-53-F-LAA-41
PV2R2-59-F-LAA-41
PV2R2-65-F-LAA-41
PV2R2-75-F-LAA-41
PV2R2-26-L-RAA-41
PV2R2-33-L-RAA-41
PV2R2-41-L-RAA-41
PV2R2-47-L-RAA-41
PV2R2-53-L-RAA-41
PV2R2-59-L-RAA-41
PV2R2-65-L-RAA-41
PV2R2-75-L-RAA-41
PV2R2-26-L-LAA-41
PV2R2-33-L-LAA-41
PV2R2-41-L-LAA-41
PV2R2-47-L-LAA-41
PV2R2-53-L-LAA-41
PV2R2-59-L-LAA-41
PV2R2-65-L-LAA-41
PV2R2-75-L-LAA-41

PV2R3型单级叶片泵
PV2R3-52-F-RAA-31
PV2R3-60-F-RAA-31
PV2R3-66-F-RAA-31
PV2R3-85-F-RAA-31
PV2R3-76-F-RAA-31
PV2R3-94-F-RAA-31
PV2R3-116-F-RAA-31
PV2R3-125-F-RAA-31
PV2R3-136-F-RAA-31
PV2R3-153-F-RAA-31
PV2R3-52-L-RAA-31
PV2R3-60-L-RAA-31
PV2R3-66-L-RAA-31
PV2R3-85-L-RAA-31
PV2R3-76-L-RAA-31
PV2R3-94-L-RAA-31
PV2R3-116-L-RAA-31
PV2R3-125-L-RAA-31
PV2R3-136-L-RAA-31
PV2R3-153-L-RAA-31

PV2R4型单级叶片泵
PV2R4-125-F-RAA-30
PV2R4-136-F-RAA-30
PV2R4-153-F-RAA-30
PV2R4-184-F-RAA-30
PV2R4-200-F-RAA-30
PV2R4-237-F-RAA-30
PV2R4-250-F-RAA-30
PV2R4-125-L-RAA-30
PV2R4-136-L-RAA-30
PV2R4-153-L-RAA-30
PV2R4-184-L-RAA-30
PV2R4-200-L-RAA-30
PV2R4-237-L-RAA-30
PV2R4-250-L-RAA-30
……
山高月小,水落石出。—— 苏轼《后赤壁赋》
Yuken Oil Hydraulic Equipment
油研液压设备
Hydraulic Pumps
液压泵
VANE PUMPS
叶片泵 定量泵
PV2R*型双联叶片泵
PV2R12-6-26-F-REAA-43
PV2R12-6-33-F-REAA-43
PV2R12-6-41-F-REAA-43
PV2R12-6-47-F-REAA-43
PV2R12-6-53-F-REAA-43
PV2R12-6-59-F-REAA-43
PV2R12-6-65-F-REAA-43
PV2R12-8-26-F-REAA-43
PV2R12-8-33-F-REAA-43
PV2R12-8-41-F-REAA-43
PV2R12-8-47-F-REAA-43
PV2R12-8-53-F-REAA-43
PV2R12-8-59-F-REAA-43
PV2R12-8-65-F-REAA-43
PV2R12-10-26-F-REAA-43
PV2R12-10-33-F-REAA-43
PV2R12-10-41-F-REAA-43
PV2R12-10-47-F-REAA-43
PV2R12-10-53-F-REAA-43
PV2R12-10-59-F-REAA-43
PV2R12-10-65-F-REAA-43
PV2R12-12-26-F-REAA-43
PV2R12-12-33-F-REAA-43
PV2R12-12-41-F-REAA-43
PV2R12-12-47-F-REAA-43
PV2R12-12-53-F-REAA-43
PV2R12-12-59-F-REAA-43
PV2R12-12-65-F-REAA-43
PV2R12-14-26-F-REAA-43
PV2R12-14-33-F-REAA-43
PV2R12-14-41-F-REAA-43
PV2R12-14-47-F-REAA-43
PV2R12-14-53-F-REAA-43
PV2R12-14-59-F-REAA-43
PV2R12-14-65-F-REAA-43
PV2R12-17-26-F-REAA-43
PV2R12-17-33-F-REAA-43
PV2R12-17-41-F-REAA-43
PV2R12-17-47-F-REAA-43
PV2R12-17-53-F-REAA-43
PV2R12-17-59-F-REAA-43
PV2R12-17-65-F-REAA-43
PV2R12-19-26-F-REAA-43
PV2R12-19-33-F-REAA-43
PV2R12-19-41-F-REAA-43
PV2R12-19-47-F-REAA-43
PV2R12-19-53-F-REAA-43
PV2R12-19-59-F-REAA-43
PV2R12-19-65-F-REAA-43
PV2R12-23-26-F-REAA-43
PV2R12-23-33-F-REAA-43
PV2R12-23-41-F-REAA-43
PV2R12-23-47-F-REAA-43
PV2R12-23-53-F-REAA-43
PV2R12-23-59-F-REAA-43
PV2R12-23-65-F-REAA-43
PV2R12-25-33-F-REAA-43
PV2R12-25-41-F-REAA-43
PV2R12-25-47-F-REAA-43
PV2R12-25-53-F-REAA-43
PV2R12-25-59-F-REAA-43
PV2R12-25-65-F-REAA-43
PV2R12-31-33-F-REAA-43
PV2R12-31-41-F-REAA-43
PV2R12-31-47-F-REAA-43
PV2R12-31-53-F-REAA-43
PV2R12-31-59-F-REAA-43
PV2R12-31-65-F-REAA-43
双联叶片泵
PV2R13-6-76-F-REAA-43
PV2R13-6-94-F-REAA-43
PV2R13-6-116-F-REAA-43
PV2R13-8-76-F-REAA-43
PV2R13-8-94-F-REAA-43
PV2R13-8-116-F-REAA-43
PV2R13-10-76-F-REAA-43
PV2R13-10-94-F-REAA-43
PV2R13-10-116-F-REAA-43
PV2R13-12-76-F-REAA-43
PV2R13-12-94-F-REAA-43
PV2R13-12-116-F-REAA-43
PV2R13-14-76-F-REAA-43
PV2R13-14-94-F-REAA-43
PV2R13-14-116-F-REAA-43
PV2R13-17-76-F-REAA-43
PV2R13-17-94-F-REAA-43
PV2R13-17-116-F-REAA-43
PV2R13-19-76-F-REAA-43
PV2R13-19-94-F-REAA-43
PV2R13-19-116-F-REAA-43
PV2R13-23-76-F-REAA-43
PV2R13-23-94-F-REAA-43
PV2R13-23-116-F-REAA-43
PV2R13-25-76-F-REAA-43
PV2R13-25-94-F-REAA-43
PV2R13-25-116-F-REAA-43
PV2R13-31-76-F-REAA-43
PV2R13-31-94-F-REAA-43
PV2R13-31-116-F-REAA-43
双联叶片泵
PV2R23-41-52-F-REAA-41
PV2R23-41-60-F-REAA-41
PV2R23-41-66-F-REAA-41
PV2R23-41-76-F-REAA-41
PV2R23-41-94-F-REAA-41
PV2R23-41-116-F-REAA-41
PV2R23-47-52-F-REAA-41
PV2R23-47-60-F-REAA-41
PV2R23-47-66-F-REAA-41
PV2R23-47-76-F-REAA-41
PV2R23-47-94-F-REAA-41
PV2R23-47-116-F-REAA-41
PV2R23-53-60-F-REAA-41
PV2R23-53-66-F-REAA-41
PV2R23-53-76-F-REAA-41
PV2R23-53-94-F-REAA-41
PV2R23-53-116-F-REAA-41
PV2R23-59-60-F-REAA-41
PV2R23-59-66-F-REAA-41
PV2R23-59-76-F-REAA-41
PV2R23-59-94-F-REAA-41
PV2R23-59-116-F-REAA-41
PV2R23-65-66-F-REAA-41
PV2R23-65-76-F-REAA-41
PV2R23-65-94-F-REAA-41
PV2R23-65-116-F-REAA-41
双联叶片泵
PV2R33-52-52-F-RAAA-31
PV2R33-60-52-F-RAAA-31
PV2R33-66-52-F-RAAA-31
PV2R33-76-52-F-RAAA-31
PV2R33-94-52-F-RAAA-31
PV2R33-52-60-F-RAAA-31
PV2R33-60-60-F-RAAA-31
PV2R33-66-60-F-RAAA-31
PV2R33-76-60-F-RAAA-31
PV2R33-94-60-F-RAAA-31
PV2R33-52-66-F-RAAA-31
PV2R33-60-66-F-RAAA-31
PV2R33-66-66-F-RAAA-31
PV2R33-76-66-F-RAAA-31
PV2R33-52-76-F-RAAA-31
PV2R33-60-76-F-RAAA-31
PV2R33-66-76-F-RAAA-31
PV2R33-76-76-F-RAAA-31
PV2R33-94-76-F-RAAA-31
PV2R33-52-94-F-RAAA-31
PV2R33-60-94-F-RAAA-31
PV2R33-66-94-F-RAAA-31
PV2R33-76-94-F-RAAA-31
PV2R33-94-94-F-RAAA-31
PV2R33-52-116-F-RAAA-31
PV2R33-60-116-F-RAAA-31
PV2R33-66-116-F-RAAA-31
PV2R33-76-116-F-RAAA-31
PV2R33-116-116-F-RAAA-31
PV2R33-116-52-F-RAAA-31
PV2R33-116-60-F-RAAA-31
PV2R33-116-66-F-RAAA-31
PV2R33-116-76-F-RAAA-31
PV2R33-116-94-F-RAAA-31

双联叶片泵
PV2R14-6-136-F-RAAA-31
PV2R14-6-153-F-RAAA-31
PV2R14-6-184-F-RAAA-31
PV2R14-6-200-F-RAAA-31
PV2R14-6-237-F-RAAA-31
PV2R14-8-136-F-RAAA-31
PV2R14-8-153-F-RAAA-31
PV2R14-8-184-F-RAAA-31
PV2R14-8-200-F-RAAA-31
PV2R14-8-237-F-RAAA-31
PV2R14-10-136-F-RAAA-31
PV2R14-10-153-F-RAAA-31
PV2R14-10-184-F-RAAA-31
PV2R14-10-200-F-RAAA-31
PV2R14-10-237-F-RAAA-31
PV2R14-12-136-F-RAAA-31
PV2R14-12-153-F-RAAA-31
PV2R14-12-184-F-RAAA-31
PV2R14-12-200-F-RAAA-31
PV2R14-12-237-F-RAAA-31
PV2R14-14-136-F-RAAA-31
PV2R14-14-153-F-RAAA-31
PV2R14-14-184-F-RAAA-31
PV2R14-14-200-F-RAAA-31
PV2R14-14-237-F-RAAA-31
PV2R14-17-136-F-RAAA-31
PV2R14-17-153-F-RAAA-31
PV2R14-17-184-F-RAAA-31
PV2R14-17-200-F-RAAA-31
PV2R14-17-237-F-RAAA-31
PV2R14-19-136-F-RAAA-31
PV2R14-19-153-F-RAAA-31
PV2R14-19-184-F-RAAA-31
PV2R14-19-200-F-RAAA-31
PV2R14-19-237-F-RAAA-31
PV2R14-23-136-F-RAAA-31
PV2R14-23-153-F-RAAA-31
PV2R14-23-184-F-RAAA-31
PV2R14-23-200-F-RAAA-31
PV2R14-23-237-F-RAAA-31
PV2R14-25-136-F-RAAA-31
PV2R14-25-153-F-RAAA-31
PV2R14-25-184-F-RAAA-31
PV2R14-25-200-F-RAAA-31
PV2R14-25-237-F-RAAA-31
PV2R14-31-136-F-RAAA-31
PV2R14-31-153-F-RAAA-31
PV2R14-31-184-F-RAAA-31
PV2R14-31-200-F-RAAA-31
PV2R14-31-237-F-RAAA-31
双联叶片泵
PV2R24-41-136-F-REAA-40
PV2R24-41-153-F-REAA-40
PV2R24-41-184-F-REAA-40
PV2R24-41-200-F-REAA-40
PV2R24-41-237-F-REAA-40
PV2R24-47-136-F-REAA-40
PV2R24-47-153-F-REAA-40
PV2R24-47-184-F-REAA-40
PV2R24-47-200-F-REAA-40
PV2R24-47-237-F-REAA-40
PV2R24-53-136-F-REAA-40
PV2R24-53-153-F-REAA-40
PV2R24-53-184-F-REAA-40
PV2R24-53-200-F-REAA-40
PV2R24-53-237-F-REAA-40
PV2R24-59-136-F-REAA-40
PV2R24-59-153-F-REAA-40
PV2R24-59-184-F-REAA-40
PV2R24-59-200-F-REAA-40
PV2R24-59-237-F-REAA-40
PV2R24-65-136-F-REAA-40
PV2R24-65-153-F-REAA-40
PV2R24-65-184-F-REAA-40
PV2R24-65-200-F-REAA-40
PV2R24-65-237-F-REAA-40
双联叶片泵
PV2R34-52-136-F-RAAA-31
PV2R34-52-153-F-RAAA-31
PV2R34-52-184-F-RAAA-31
PV2R34-52-200-F-RAAA-31
PV2R34-52-237-F-RAAA-31
PV2R34-60-136-F-RAAA-31
PV2R34-60-153-F-RAAA-31
PV2R34-60-184-F-RAAA-31
PV2R34-60-200-F-RAAA-31
PV2R34-60-237-F-RAAA-31
PV2R34-66-136-F-RAAA-31
PV2R34-66-153-F-RAAA-31
PV2R34-66-184-F-RAAA-31
PV2R34-66-200-F-RAAA-31
PV2R34-66-237-F-RAAA-31
PV2R34-76-136-F-RAAA-31
PV2R34-76-153-F-RAAA-31
PV2R34-76-184-F-RAAA-31
PV2R34-76-200-F-RAAA-31
PV2R34-76-237-F-RAAA-31
PV2R34-85-136-F-RAAA-31
PV2R34-85-153-F-RAAA-31
PV2R34-85-184-F-RAAA-31
PV2R34-85-200-F-RAAA-31
PV2R34-85-237-F-RAAA-31
PV2R34-94-136-F-RAAA-31
PV2R34-94-153-F-RAAA-31
PV2R34-94-184-F-RAAA-31
PV2R34-94-200-F-RAAA-31
PV2R34-94-237-F-RAAA-31
PV2R34-116-136-F-RAAA-31
PV2R34-116-153-F-RAAA-31
PV2R34-116-184-F-RAAA-31
PV2R34-116-200-F-RAAA-31
PV2R34-116-237-F-RAAA-31
PV2R34-125-136-F-RAAA-31
PV2R34-125-153-F-RAAA-31
PV2R34-125-184-F-RAAA-31
PV2R34-125-200-F-RAAA-31
PV2R34-125-237-F-RAAA-31
……
但愿人长久,千里共婵娟。—— 苏轼《水调歌头》