34results about How to "Avoid excessive" patented technology

An improved energy efficient intelligent rotary pulser for generating a mud pulse in a MWD (measurement while drilling) application. In the rotary pulser, a control circuit activates a brushless motor that rotates a windowed restrictor relative to a fixed housing to act as a shutter and window respectively. Opening of the windowed restrictor allows generally unrestricted mud flow. Closing of the windowed restrictor generally restricts mud flow. The windowed restrictor is powered both in opening and closing operations by the motor.

A large thrust ball bearing, retainer, and raceways, using a surface treatment such as hard anodize, lowers the friction and wear. The retainer, molded in synthetic resin with self-lubricated material reinforced with carbon fiber such as MoS2, and PTPE, eliminates the thermal viscosity. Multi-segment retainers, each with an inner race-guided configuration, an alternative ball pocket cross-section design with a slotted configuration, reduce the thermal effects, improve the producibility of the retainer, and reduce the manufacturing cost. The pocket design with an oval cross-section instead of a circular cross-section also reduces the localized thermal-induced effect which would otherwise result in a pinching condition between the ball and the retainer. The alternative slotted retainer pocket design increases the compliance between ball / pocket interfaces, which helps to reduce the dynamic effects. The ends of the retainer segments are designed to reduce the interactive transferring, circumferential force between two adjacent segments.

The invention relates to a method for treating coking wastewater biologically. The technical scheme is that: the method comprises the following steps of: based on volume percent fraction, making 0 to 60 percent of pretreated coking wastewater enter an aerobic decarbonization tank (1) for decarbonization through a valve A, and staying for 6 to 12 hours; making the decarbonized coking wastewater enter an anoxic denitrification tank (2), simultaneously making 40 to 100 percent of pretreated coking wastewater enter the anoxic denitrification tank (2) through a valve B, and staying for 15 to 25 hours; making the wastewater enter an aerobic nitrification tank (3), and staying for 20 to 30 hours; and settling the wastewater in a secondary sedimentation tank (4) for 2 to 3 hours, refluxing clear water in a reflux ratio of 300 to 500 percent into the anoxic denitrification tank (2) for denitrification, refluxing sludge in a reflux ratio of 50 to 100 percent into the aerobic decarbonization tank (1) and the anoxic denitrification tank (2), and coagulating effluent of the secondary sedimentation tank (4) and then discharging the wastewater after the wastewater meets the standard. In the process, the COD and NH3-N in the wastewater all meet the first-class requirement of integrated wastewater discharge standard; the denitrification rate of the system is high; and the concentration of nitrate nitrogen in the effluent is low.

The invention discloses a driving device. The driving device comprises a driving plate with a curved guide groove and a power device (5) driving the driving plate to move. The driving device is characterized in that the driving plate comprises a horizontal openable plate (1) and a vertical lifting plate (2), the horizontal openable plate (1) is provided with a pair of openable curved guide grooves (3) spread from the plate center to one end, the vertical lifting plate (2) is fixed below the middle of the horizontal openable plate (1) and is provided with at least one lifting curve guide groove (4) moving in the vertical direction, the openable curved guide grooves (3) are connected to a mechanism needing horizontal displacement, and the lifting curve guide grooves (4) are connected to a mechanism needing vertical displacement. The driving device can enable the mechanisms to move in the horizontal direction and the vertical direction synchronously through the power device, the number of the transmission steps of force is small, transmission is direct, delay and dis-coordination are avoided, and the efficiency is high.

A control apparatus for a hybrid vehicle includes an engine, an exhaust gas purification catalyst, a first motor-generator, an output section, a differential mechanism, a second motor-generator, and a controller. The output section is configured to transfer torque to driving wheels of the hybrid vehicle. The differential mechanism is configured to distribute the torque from the engine to the first motor-generator and the output section. The second motor-generator is connected to the output section through gears. The controller is configured to: (a) execute a temporarily changing the air-fuel ratio of the engine to a rich side as a rich spike operation when a specified condition is satisfied, and (b) set the specified condition so that the rich spike operation is easily executed as a motor torque of the second motor-generator increases.