YHB-Y series horizontal circular arc gear pump

The YHB-Y series horizontal circular arc gear pump relies on a pair of double circular arc toothed gears to mesh and operate, and relies on the alternating volume of the cavity between the teeth to complete the suction and discharge of liquid medium. The equipment adopts a horizontal installation structure and is suitable for oil supply, unit lubrication, fluid transmission and pressurization in thin oil stations. It supports continuous operation and intermittent start stop.

The main components of the whole machine include the pump body, front and rear pump covers, driving shaft, driven shaft, circular arc gear, balanced bearing assembly, shaft end seal, and built-in overflow structure. The gear undergoes heat treatment and has a double arc sine curve tooth profile, with continuous meshing contact and relatively small relative slip on the tooth surface. The pump chamber is equipped with a pressure balance channel to reduce the axial force generated during operation and minimize bearing wear. The shell material can be selected from cast iron or stainless steel as needed; Insulation jacket can be added for conveying easily solidified media; Copper gears can be selected for specific working conditions. The internal moving components rely on the self lubrication of the conveying medium and do not require an independent lubrication system.

The power is driven by an elastic coupling to rotate the driving gear, while the driven gear rotates synchronously in the opposite direction. When the gear disengages from the meshing area, the cavity volume increases to form negative pressure, and the medium flows into the tooth groove; The medium is transported to the oil pressure area along with the gear, and the gear mesh compresses the cavity volume. The medium is compressed and transported outward, achieving continuous feeding through circulation. The flow rate is linearly related to the rotational speed, and when combined with a speed control device, the conveying capacity can be adjusted. The equipment has basic self-priming ability and can be started and stopped multiple times after the initial injection of medium.

The pump body is equipped with a built-in overflow structure. When the pipeline is blocked or the valve is closed, causing abnormal pressure rise, the medium flows back inside the pump to relieve pressure and reduce equipment damage caused by high pressure. This structure is only used for emergency overload protection and cannot be used for long-term voltage stabilization. When there is a need for constant pressure transmission, an external pressure regulating pipeline can be connected. The pump chamber flow channel is unobstructed, with fewer dead corners inside, making it easy to flush and clean.

The sealing scheme can be combined with the temperature and corrosion characteristics of the medium to select forms such as packing seal and mechanical seal. The whole machine adopts a split assembly structure. During maintenance, the pump cover can be disassembled to replace the seals, check the status of gears and bearings, and there is no need to dismantle the pipelines as a whole. The insulation style can be used for conveying viscous, low-temperature and easily solidified media.

Suitable for conveying liquid materials that do not contain hard particles, fiber impurities, and have fluidity and lubrication characteristics. The medium has a kinematic viscosity range of 5-1500mm ²/s and can transport fluids such as turbine oil, lubricating oil, diesel, fuel oil, etc. Not suitable for strongly corrosive media, media containing a large amount of solid particles, and low flash point volatile media.

The equipment relies on a horizontal base for fixed installation, with standard foot holes reserved and flange interfaces adapted to conventional industrial pipelines. Correct coaxiality during coupling assembly to reduce vibration wear. It is recommended to install a filtering device in the suction pipeline to prevent impurities from entering the pump chamber. Before starting, the medium inside the pump chamber needs to be retained, and it is forbidden to idle for a long time. The pump body with insulation structure can preheat the chamber before conveying easily solidified materials.

Daily maintenance includes regular cleaning of filters, inspection of seal leaks, monitoring of operating temperature rise and vibration. After conveying viscous materials, use a clean medium to circulate and flush the pump chamber to prevent the materials from drying up and adhering. Long term shutdown requires the removal of residual media from the cavity to reduce the possibility of corrosion and material solidification.

Compared with the conventional involute gear structure, the circular arc tooth profile has smaller operating pulsation, trapped oil effect, and operating noise. The equipment is mostly used for forced lubrication systems of the unit, oil supply in the lubrication station, and oil medium transfer conditions.