3results about How to "Avoid frictional heat" patented technology

This invention proposes a high-rigidity, high-precision external cylindrical grinding wheel spindle, comprising a housing, a spindle sleeve installed within the housing, and a shaft core rotatably installed within the spindle sleeve, the shaft core being supported by a front bearing assembly and a rear bearing assembly. It also includes a preload structure for applying and adjusting axial preload to the front bearing assembly, thereby enhancing the system rigidity of the shaft core. This invention improves the system rigidity of the grinding spindle by employing a four-section angular contact ball bearing layout at the front end of the spindle, combined with precision grinding of inner and outer spacers or thermal expansion compensation sleeves. This allows the spindle to withstand greater grinding forces and directly guarantees the highest rotational accuracy at the working end. The rear end of the spindle adopts a floating bearing assembly design, which eliminates destructive thermal stress and protects the preset precision preload state of the front bearing assembly, thus ensuring that the spindle maintains high precision throughout the entire temperature rise process.

This utility model relates to the field of bearing technology and discloses a bearing with a cage tension adjustment structure, including an adjustment assembly comprising a bearing outer ring, an annular groove, and an annular inclined surface. This utility model achieves dynamic adjustment of the cage tension by rotating the adjustment ring to drive the adjustment block and the movable ring axially, utilizing the annular inclined surface of the movable ring to convert the axial force into radial force. This allows for flexible adaptation to various operating conditions such as speed and load, avoiding excessive tightness leading to frictional heat and increased wear, or excessive looseness causing uneven rolling element distribution, vibration, and noise. It solves the problem of existing bearing cages being unable to dynamically adjust tension. Simultaneously, the adjustment tool, consisting of an adjustment hole, adjustment rod, and annular adjustment cap, combined with the directional guiding effect of the limiting block and limiting groove, makes the adjustment operation more convenient and stable, overcoming the shortcomings of traditional cage structures being simple and limited in adjustment, and meeting the needs of diverse working scenarios and complex operating conditions.

A kind of magnetorheological damper using permanent magnetic seal ring, including cylinder assembly, piston assembly;Cylinder assembly includes working cylinder, working cylinder one end is sealed through sealing guide mechanism and is sealed with piston rod;Working cylinder other end is provided with gas compensation assembly;Piston assembly includes piston rod, and piston rod is connected with piston head assembly;Piston head assembly includes piston sleeve, and iron core is arranged in piston sleeve, and the left and right ends of iron core are correspondingly clamped with upper end cover and lower end cover and are combined into an integral whole with piston sleeve;Excitation coil is provided in piston sleeve and located outside iron core, and excitation coil controls the damping performance of magnetorheological fluid.The magnetorheological damper using permanent magnetic seal ring provided by the application can effectively reduce the leakage of magnetorheological fluid.