4results about How to "Reduce mechanical loss" patented technology

The present invention proposes a steel cage, which relates to the field of building materials, and specifically to a steel cage and an assembly method thereof, including a steel cage, main bars and end pile hoops, wherein the steel cage is provided with main bars, and the two ends of the main bars are respectively connected to the end pile hoops; the steel cage includes longitudinal bars and annular bars; and a connector for fixing the end pile hoops is provided between the end pile hoops and the steel cage. The main bars of the present invention do not need to be welded to the annular bars, which reduces the mechanical loss of the main bars due to welding during the steel cage forming process, and reduces the difficulty of operation and labor intensity of workers; at the same time, the end plate used in the present invention has no waist-shaped holes, and there is no need to transfer the main bars behind the pier head to the small holes through the waist-shaped holes. The main bars behind the pier head can be directly inserted into the countersunk holes in the end plate, which is simple to operate.

The utility model discloses a centrifugal impeller and fan structure capable of simultaneously reducing axial force and leakage rate, the centrifugal impeller comprises a wheel disc, a plurality of main blades are uniformly arranged on the front surface of the wheel disc, and a plurality of binary auxiliary blades are uniformly arranged on the back surface of the wheel disc. The rotating directions of the main blades and the binary auxiliary blades are arranged in the pressure increasing direction, the structure that the binary auxiliary blades are arranged on the back face of the impeller is adopted, when the impeller rotates, the auxiliary blades drive air on the back face of the wheel disc to do centrifugal motion, and the vacuum effect is formed on the back face of the wheel disc. On one hand, the air quantity leaked from the shaft end sealing structure by the impeller can be greatly reduced, and on the other hand, the axial force is greatly reduced, the load of a thrust bearing is reduced, and the mechanical loss is reduced; according to the two advantages, the overall efficiency of the compressor is improved, and the operation cost of a unit is saved.

The utility model relates to the technical field of chemical catalytic reaction equipment provides a kind of for solid particle catalysis suspended state fixed bed reaction device, including reactor, solid particle catalyst layer, Reynolds number control unit and filter screen structure;Solid particle catalyst layer is filled in reactor, and its filling volume occupies 1 / 3~1 / 2 of reactor reaction zone effective volume;Reynolds number control unit is connected with reactor, and filter screen structure is arranged at the top and bottom of the reactor reaction zone.This scheme not only solves the problem of swelling blockage in the application of solid particle catalyst, prolongs the cycle of operation, and the suspended state promotes catalyst and fluid to be in full contact, prevents material short circuit, improves conversion rate, and further inhibits mechanical loss, reduces production cost.

The present invention discloses a coaxial integrated energy-saving Roots blower applied to the field of blowers. The blower makes the blower and the motor coaxial by directly connecting the blower main shaft with the rotor of the driving motor, which can effectively reduce mechanical loss to improve transmission efficiency, effectively reduce occupied space and reduce noise. In addition, a cooler is added on the basis of the existing Roots blower to dissipate heat for the blower main shaft. The blower main shaft is clamped by a shock-absorbing heat dissipation ring, which can effectively reduce the vibration of the blower main shaft during rotation and self-lubricate it. A heat-absorbing block is used to absorb the heat of the blower main shaft and transfer it to the inside of the shock-absorbing heat dissipation ring, and the lubricating oil is circulated inside the shock-absorbing heat dissipation ring to take away the heat, thereby effectively dissipating the heat for the blower main shaft. In addition, a cooler is used to absorb the heat generated by the Roots blower during operation and dissipate the heat, thereby achieving shock-absorbing, heat-dissipating and lubricating effects on the blower main shaft, and effectively improving the stability of the blower main shaft during operation.