Portable hydraulic pump for use with torque wrench
Disclosed herein is an improved hydraulic torque wrench pump (HTWP) which utilizes a combined filtration system and cooling system for filtering and cooling substantially all the oil returned to the pump including from a hydraulic torque wrench. The hydraulic torque wrench pump includes an electric motor and one or more pumping elements arranged in a protective frame. The electric motor used in association with the hydraulic pump has a high-efficiency design that includes a high power to height ratio and yields efficiency in a range of 90% to 95%. A sealed oil tank is used for storing the oil. The sealed oil tank helps in restricting one or more impurities from entering and contaminating the oil.
1. A hydraulic pump comprising:
a motor and one or more pumping elements arranged within a protective frame;
at least one sealed oil tank arranged in the protective frame, wherein the sealed oil tank communicates with a first passage for receiving recovered oil and a second passage for communicating with a suction port of the hydraulic pump;
a twin-line hose adapted to circulate oil between the sealed oil tank and a hydraulic torque wrench; and
a filtration system and a heat exchange system arranged in a tandem fashion and accommodated within the first passage;
wherein the first passage is configured such that the filtration system receives substantially all oil recovered from the hydraulic torque wrench via the twin-line hose and substantially all oil drawn from the suction port of the hydraulic pump that bypasses the hydraulic torque wrench; and
wherein the first passage is further configured such that the heat exchange system receives all oil from the filtration system, maintains the filtered oil temperature at a predetermined value and delivers all oil exiting the heat exchange system to the sealed oil tank.
2. The hydraulic pump of claim 1 , wherein the heat exchange system includes an air-cooled heat exchanger.
3. The hydraulic pump of claim 1 , wherein the motor is at least one of an electric motor or a pneumatic motor.
4. The hydraulic pump of claim 1 further comprising at least one manifold selected from the group consisting of a pneumatic manifold and an electric manifold, said manifold adapted and configured to circulate oil between the suction port and the hydraulic torque wrench by way of the twin line hose.
5. The hydraulic pump of claim 4 , further comprising one or more valves for controlling pressure in the hydraulic pump.
6. The hydraulic pump of claim 1 , wherein the filtration system removes particles greater than 10 μm from the recovered oil.
7. The hydraulic pump of claim 1 , wherein the heat exchange system maintains filtered oil at a temperature between about 0° C. and about 40° C.