Pneumatic oil pump
1 Overview
Pneumatic oil pump is a high-pressure pump that converts air pressure into hydraulic power. It is controlled by oil and pneumatic components and is mainly used in systems that use hydraulic oil as the medium. When the electric pump fails, the power is cut off or the power is not allowed to start the pneumatic oil pump, so it is an auxiliary pump on the BOP control device.
Name Model Nominal
Pressure MPa nominal
Diameter mm liquid-gas ratio gas source
Pressure MPa work
Pressure Mpa Theoretical displacement ml/flush Net weight kg Volume cm³
Pneumatic oil pump QYB40-60L 40 25 60: 1 0.65~0.8 21 60 36 98*20*20
2. Structure and working principle
As shown in the figure, the pneumatic pump is mainly composed of the following parts:
Connecting rod, shuttle, connecting block, shell, piston, short pipe, cylinder, cylinder support, piston connecting rod, cylinder connecting rod, V-shaped packing, V-shaped fabric seal ring, plunger assembly, seal, Pressure ring, check valve body, oil cylinder, steel ball B1, B2, etc.
Compressed air enters the housing cavity from the air inlet, enters the lower cavity of the cylinder through the upper air pipe and short pipe of the housing, pushing the piston upward, and the air in the upper cavity of the cylinder passes through the lower air pipe of the housing and is discharged from the exhaust port. The piston drives the plunger assembly upward through the cylinder connecting rod, pressing the high pressure oil in the upper cavity of the cylinder out of the oil discharge port, and at the same time the steel ball B2 moves upward, and the hydraulic oil enters the lower cavity of the cylinder from the oil suction port. When the piston moves up to the top of the cylinder, the shuttle is moved up just past the midpoint of the reversing mechanism by pushing the connecting rod, and the shuttle is quickly pushed upwards under the push of the ejector pin spring to drive the connecting block to make the upper air pipe and the exhaust The air is connected. At this time, the air enters the upper cavity of the cylinder through the lower air pipe of the housing, pushing the piston down, and the air in the lower cavity of the cylinder passes through the short pipe and the upper air pipe of the housing is discharged from the exhaust port. The piston drives the plunger assembly down through the cylinder connecting rod. The steel ball B2 moves down to close the suction port, while the steel ball B1 moves up. The hydraulic oil in the lower cavity of the cylinder enters the upper cavity of the cylinder through the check valve body. When the piston moves down to the bottom of the cylinder, the shuttle is moved down just past the midpoint of the reversing mechanism by driving the connecting rod. Under the push of the ejector pin spring, the shuttle is quickly pushed downwards, driving the connecting block, and lowering the casing. The air pipe communicates with the exhaust port, and the air enters the lower cavity of the cylinder. In this reciprocating change of air flow, even if the piston and the piston connecting rod are connected to reciprocate up and down, at the same time, the plunger assembly is also driven to reciprocate up and down to realize the oil absorption and oil discharge process of the oil pump.
The top of the cylinder of the pneumatic oil pump is equipped with a sealing packing. When the oil leaks, the packing cap can be adjusted, but it should not be too tight, otherwise it will accelerate the wear of the packing and the connecting rod of the cylinder.
3. Features and instructions
The working characteristics of the pneumatic oil pump are: intermittent oil suction, continuous oil discharge, stable start, and load start.
The air-operated oil pump has a cylinder and cylinder cavity surface area ratio of 60:1, so the theoretical ratio of intake pressure to oil discharge pressure is 1:60. When the air source pressure is 0.53~0.8Mpa, the theoretical oil pressure can reach 32 ~48Mpa.
The oil discharge and air consumption of the pneumatic oil pump are not constant, but change with the load pressure. When the load pressure is low, the pump strokes increase, and the oil discharge and air consumption increase; when the load pressure is high, the pump strokes decrease, and the oil discharge and air consumption decrease.
Company Information
UPET OILFIELD EQUIPMENTS CO.,LTD is one of the most well-known suppliers for the oilfield equipments in China, was established in 2000, and now has grown up to a star company which is not big but very strong in this field with our persistant effort step by step in the past years.Our products refer to the whole areas of oilfields, from a very small spare part to a very big complete rig system. Our main products are: pump spare parts, mud pumps&packages, DC/AC Motors, solid control equipments, power units, truck-mounted rigs, workover rigs, land rigs, drilling pipes and drilling tools etc. All of our products are manufactured according to the API Standard, and we are authorized to use API monogram.
Our products have been exported to 15 countries& areas around the world, 80% of our exsisting customers have done the business with us by more than 5 times, no one-off customer. We will continue to expand our range, and win more customers' trust with our better and better performance.
We welcome the win-win cooperation relationship with the partners from any places in the world, each customer is our god and helper. Warmly welcome you to come to China and visit us!
With us, you will save money, time, trouble, and most important point is that you can sleep better.
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