A fan frame body structure includes a first frame body. The first frame body has a first upper end, a first lower end, a first frame wall and a first main flow way. The first main flow way passes through the first frame body and is formed with a first main inlet and a first main outlet respectively at the first upper end and the first lower end. A first subsidiary flow way is disposed in the first frame wall. The first subsidiary flow way is in parallel the first main flow way. The first subsidiary outlet is positioned at the first upper end of the first frame body in flush with and in adjacency to the first main inlet.

An impeller pump for a dishwasher has a pump housing comprising a pump upper portion, pump lower portion and pump outer wall in which a pump chamber is arranged. It has a pump inlet into the pump housing and a pump outlet out of the pump housing and a heating device, which forms the pump outer wall, and a pump drive having a drive rotor, a drive stator having a stator winding and a bearing shaft. The bearing shaft is fixedly arranged on the pump housing and the drive rotor is fixedly connected to the drive rotor and they are rotatably arranged on the bearing shaft. The stator winding is arranged on a region of the pump lower portion which adjoins the pump chamber at the other side thereof in an outward radial direction so that between the pump chamber and stator winding only one wall of the pump lower portion extends so that the stator winding is surrounded by the pump chamber in an annular manner. It can thus be effectively cooled by water in the pump chamber.

An impeller pump for a dishwasher has a pump housing comprising a pump upper portion, pump lower portion and pump outer wall in which a pump chamber is arranged. It has a pump inlet into the pump housing and a pump outlet out of the pump housing and a heating device, which forms the pump outer wall, and a pump drive having a drive rotor, a drive stator having a stator winding and a bearing shaft. The bearing shaft is fixedly arranged on the pump housing and the drive rotor is fixedly connected to the drive rotor and they are rotatably arranged on the bearing shaft. The stator winding is arranged on a region of the pump lower portion which adjoins the pump chamber at the other side thereof in an outward radial direction so that between the pump chamber and stator winding only one wall of the pump lower portion extends so that the stator winding is surrounded by the pump chamber in an annular manner. It can thus be effectively cooled by water in the pump chamber.

A pump assembly for a motor vehicle, comprising at least one mechanical drive, at least one electric drive, and at least one planetary gearbox, wherein the mechanical drive and the electric drive are coupled to one another via the planetary gearbox, the electric drive comprising a rotor shaft that is designed as a hollow shaft, wherein the rotor shaft is mounted at one side on a housing of the pump assembly via a ball bearing and at the other side in a gear stage of the planetary gearbox.

A pump assembly for a motor vehicle, comprising at least one mechanical drive, at least one electric drive, and at least one planetary gearbox, wherein the mechanical drive and the electric drive are coupled to one another via the planetary gearbox, the electric drive comprising a rotor shaft that is designed as a hollow shaft, wherein the rotor shaft is mounted at one side on a housing of the pump assembly via a ball bearing and at the other side in a gear stage of the planetary gearbox.

An electric submersible pump (ESP) with reduced vibration is provided. In an implementation, an ESP section has radial bearings placed at shaft locations of reduced vibration to reduce wear. The locations of reduced vibration are selected to avoid areas of high vibration and vibrational waves that reinforce each other due to structure resonance and natural excitation frequencies. In an implementation, a radial bearing is positioned at a node of reduced vibration of a standing vibrational wave. In an implementation, a succession of multiple radial bearings are spaced at different intervals from each other to avoid conventional even spacing of the bearings that causes standing waves, resonance waves, and vibrational waves at natural excitation frequencies. In an implementation, a span between adjacent radial bearings is selected to spare other adjacent bearings at different spans the effects of vibrations that may extend over a range of excitation frequencies in the ESP section.

An electric submersible pump (ESP) with reduced vibration is provided. In an implementation, an ESP section has radial bearings placed at shaft locations of reduced vibration to reduce wear. The locations of reduced vibration are selected to avoid areas of high vibration and vibrational waves that reinforce each other due to structure resonance and natural excitation frequencies. In an implementation, a radial bearing is positioned at a node of reduced vibration of a standing vibrational wave. In an implementation, a succession of multiple radial bearings are spaced at different intervals from each other to avoid conventional even spacing of the bearings that causes standing waves, resonance waves, and vibrational waves at natural excitation frequencies. In an implementation, a span between adjacent radial bearings is selected to spare other adjacent bearings at different spans the effects of vibrations that may extend over a range of excitation frequencies in the ESP section.

A test skid for a pumping system is configured to evaluate the performance of a pump. The test skid includes a motor and a torque-thrust chamber connected between the motor and the pump. The torque-thrust chamber has a torque meter and a thrust bearing. The thrust bearing is positioned between the torque meter and the motor such that the torque meter is connected directly to the pump through a pump input shaft. In this configuration, the torque meter measures the torque applied directly to the pump without the need to account for losses through an intermediate thrust bearing.

A test skid for a pumping system is configured to evaluate the performance of a pump. The test skid includes a motor and a torque-thrust chamber connected between the motor and the pump. The torque-thrust chamber has a torque meter and a thrust bearing. The thrust bearing is positioned between the torque meter and the motor such that the torque meter is connected directly to the pump through a pump input shaft. In this configuration, the torque meter measures the torque applied directly to the pump without the need to account for losses through an intermediate thrust bearing.

A levering device includes a coupling block, a gripper, an operating rod, and a constraint sleeve. The coupling block includes a coupling chamber, two guide slots in communication with the coupling chamber, an extension rod, and an axial hole axially cut through the extension rod in communication with the coupling chamber. The operating rod being axially movably inserted through the axial hole into a bearing chamber of a housing of a motor-driven water lifting device to stop against respective one end of a wheel axle of the motor-driven water lifting device. The gripper is attachable to the two guide slots of the coupling block and includes two gripper blocks and two claw bars respectively connected to the gripper blocks. The constraint sleeve is sleeved onto the coupling block to stop the two claw bars in the respective the guide slots.