Oil Pump for Post Tension Hydraulic Jack

Double-acting hydraulic jack with oil pump is a lifting device that integrates oil pump and hydraulic cylinder. It uses oil pump to convert mechanical energy into hydraulic energy, realizes reciprocating motion through hydraulic cylinder, thus generating thrust in two directions to complete lifting or lowering action.

The 700bar Hydraulic Jack Pump is a high pressure hydraulic pump specifically designed to drive hydraulic jacks, providing working pressures up to 700 bar (approximately 10,000 psi).

A single acting hydraulic cylinder has only one working chamber, meaning oil can only enter from one port and exit from the other. Therefore, it can only achieve unidirectional movement with the help of a one-way hydraulic control valve. The pump for a single acting hydraulic cylinder is responsible for supplying pressurized oil to this chamber, driving the piston to move in one direction. In the return stroke, the piston is usually pushed back by external forces such as a spring, gravity, or load.

Electric Oil Pumps for Hydraulic Jacks are widely used in various construction scenarios, particularly in pre-tension or post-tension applications for concrete constructions, such as:
Bridge construction
Railway and highway construction
Underground structures
Buildings
Channel construction

The working principle of the prestressed concrete oil pump is mainly based on the principle of hydraulic transmission. The oil pump is driven by an electric motor or an internal combustion engine to suck the hydraulic oil from the oil tank, and then pressurizes it through a high-pressure pump and delivers it to the hydraulic jack. Under the action of the hydraulic jack, the prestressed steel bars or steel strands are gradually tensioned to the tensioning force required by the design and anchored by anchors. During the whole process, the oil pump needs to maintain a stable pressure and flow to ensure the smooth progress of the tensioning process.