Dual side double acting reciprocating pump using scotch yoke mechanism

2020 ◽  
Author(s):  
Gokhul Raj Ravikumar
Keyword(s):  
Scotch Yoke Mechanism ◽  
Reciprocating Pump

Analysis of Drive Shaft Speed Variations in a Scotch Yoke Mechanism

1982 ◽  
Vol 104 (1) ◽  
pp. 239-246 ◽  
Author(s):  
J. L. Wiederrich
Keyword(s):  
Practical Importance ◽  
Drive Shaft ◽  
Constant Speed ◽  
Shaft Speed ◽  
Flexible Coupling ◽  
Harmonic Content ◽  
Common Drive ◽  
Scotch Yoke Mechanism

Two analyses are presented for determining the drive shaft speed variations in a scotch yoke mechanism. The first analysis determines the speed variations when the mechanism is rigidly connected to a motor having a quadratic speed versus torque characteristic. The second analysis determines the speed variations when the mechanism is connected to a constant speed source through a flexible coupling. Together these models represent the two most common drive configurations. The results are of practical importance since they can be used in the preliminary calculations necessary in either the design of a main drive or the diagnosis of a drive problem in an existing machine. The methods are also of theoretical importance since they may be extended to the analysis of mechanisms having a greater harmonic content than the simple scotch yoke mechanism.

Simulation of Unsteady Flow Characteristics of the Reciprocating Pump Check Valve for High Pressure and High Flow Water Medium

2021 ◽  
Vol 144 (3) ◽  
Author(s):  
Jie Dong ◽  
Yinshui Liu ◽  
Hong Ji ◽  
Liejiang Wei ◽  
Defa Wu
Keyword(s):  
High Pressure ◽  
Fluid Dynamic ◽  
Check Valve ◽  
Initial Pressure ◽  
Lower Surface ◽  
Flow Coefficient ◽  
Valve Lift ◽  
Water Medium ◽  
Flow State ◽  
Reciprocating Pump

Abstract The distribution efficiency of the check valve directly affects the performance of the reciprocating pump. The flow coefficient is an important evaluation criterion for the flow capacity of the valve port, and it is of great significance to the design of the valve structure and even the control of cavitation. The traditional design uses flow coefficient as a fixed value, however, the flow state and flow coefficient will change during valve movement. In this study, a three-dimensional transient computational fluid dynamic model for high-pressure and large-flow reciprocating pump valve is established. The dynamic grid simulation method of coupling for the valves and plunger is innovatively proposed, and experimental verification was carried out. The flow state and pressure characteristics for the suction valve under high outlet pressure are analyzed, and the change rule of the suction coefficient is found. The research results show that the initial pressure of the plunger cavity prolongs the negative pressure duration of the plunger cavity when the valve is opened and increases the risk of cavitation of the valve. During the process from valve opening to maximum lift, the suction coefficient first increases and then decreases, and finally remains between 0.5 and 0.6. When the valve lift is large, two-stage throttling occurs, and the flow state will change from cylindrical jet on the lower surface of the valve disk to annular jet, which is beneficial to improve the suction coefficient.

scholarly journals Scotch-Yoke mechanism for a syringe pump - A case study

2016 ◽  
Vol 149 ◽  
pp. 012221 ◽  
Author(s):  
M Pramoth Kumar ◽  
K Akash ◽  
M Venkatesan
Keyword(s):  
Syringe Pump ◽  
Scotch Yoke Mechanism

Induced Flow Reciprocating Pump Theory Supported by New Performance Data

1972 ◽  
Vol 94 (4) ◽  
pp. 706-714 ◽  
Author(s):  
J. D. Burton ◽  
J. Lobo-Guerrero U.
Keyword(s):  
High Speed ◽  
Performance Data ◽  
Experimental Measurements ◽  
Long Time ◽  
Induced Flow ◽  
Hydraulic Accumulator ◽  
Reciprocating Pump

Reciprocating pumps have been employed in conjunction with air vessels and fluid accumulators for a long time in order to reduce maximum cylinder pressures and energy wastage in friction. More recently, diaphragm pumps, run at high speed, have been built utilizing a hydraulic accumulator or capacitance in conjunction with a hydraulic inductance, in order to greatly increase the flow output. Volumetric efficiencies of over 250 percent have been obtained. The present paper describes briefly this induced flow principle and then compares theoretical solutions with experimental measurements taken in the first commercially available pump of this type.

scholarly journals Collision Contact Characteristics for Reciprocating Pump Using FEA and Experiments

2013 ◽  
Vol 5 ◽  
pp. 647870
Author(s):  
Junfeng Pei ◽  
Chao He ◽  
Miaorong Lv ◽  
Xianru Huang ◽  
Kejun Shen ◽  
...  
Keyword(s):  
Reciprocating Pump
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