Working volume change and move the heat pump to rely on high viscosity pump arc gear between the cylinder and formed to transport liquid or pressurized so that the rotary pump.
External mesh double gear pump structure. A pair of gears meshing with each other and the pump cylinder to the suction chamber and the discharge chamber are separated. When the gear rotates, the suction chamber side teeth tooth disengaged from each other at a gradually increasing volume, pressure drop, fluid under pressure into the teeth in action. With the rotation of gear teeth of one liquid is brought to the discharge chamber. Then interdental volume of the discharge chamber side of the gear teeth is gradually reduced, and the liquid is discharged. Gear pump for conveying solid particles, non-corrosive, lubricating viscosity range of large liquid. Pump flow up to 300 m 3 / h, pressure up to 3 × 107 Pa. It is usually used as a hydraulic pump and transport various types of oil. Gear pump structure is simple and compact, easy to manufacture, easy maintenance, self-absorption capacity, but the flow, pressure pulsation is large and noisy. Gear pumps must be equipped with a safety valve to prevent the discharge pipe for some reason such as clogging the pump outlet pressure exceeds the allowable value and damage the pump or prime mover
First, the working principle:
High viscosity arc heat pump is a positive displacement pump by two gears, pump and front cover consisting of two enclosed space, when the gear rotates, the volume of space gear disengagement side grew larger, forming a vacuum, will liquid suction, the volume of space gear side from big to small, and squeeze the liquid line to go. Suction chamber and discharge chamber is by engaging line to separate the two gears.
The outlet pressure of the gear pump depends entirely on the size of the pump source resistance.
Second, the operation and maintenance:
(1) Check all pipes before starting the flange sealing joints.
(2) dynamic coupling plate, no friction and collision sound.
(3) for the first time should start within the transmission fluid injection pump.
(4) The start should be fully open in the suction and discharge line valves, non-closing valve actuation.
(5) After verifying motor rotation direction, start the motor.
Third, the failure and repair methods:
(1) Symptom: The pump can not discharge
Cause: a, opposite the direction of rotation; b, suction or discharge valve closed; c, the inlet pressure is too low, or no material; d, the viscosity is too high, the pump can not bite material
Strategies: a, confirm the direction of rotation; b, confirm the valve is closed; c, check valves and pressure gauges; d, checking viscosity of the liquid to a low speed when the speed ratio according to whether there is traffic, if traffic flows into the shortage,
(2) Symptom: Insufficient pump flow
Cause: a, suction or discharge valve closed; b, the inlet pressure is low; c, export pipeline blockage; d, packing box leakage; e, speed is too low
Strategies: a, confirm the valve is closed; b, check valves are open; c, to confirm whether the normal excretion; d, fastening; a large number of leak leakage affecting production, should be stopped, demolition inspection; e, check the actual speed of the pump shaft ;
Performance parameters:
