41results about How to "Stable feed rate" patented technology

The invention discloses a process for preparing 1,1,1-trifluoroethane and 1,1,1-difluorochloroethane by using vinyl chloride and waterless hydrogen fluoride as the raw material, characterized in that, two liquid phase fluorine reaction kettles are employed for tandem reaction, the first reaction kettle uses one or two of SnCl4, TiCl4 as catalyst, while the second reaction kettle uses one or more from SbCl5, TaCl5, TaF5, NbCl5 as catalyst, which make the HF react completely.

The invention relates to an alkoxy hydrosilane single-tower reaction industrial preparing technology and belongs to the technical field of fine chemical engineering. The alkoxy hydrosilane single-tower reaction industrial preparing technology comprises the steps that hydrogen-containing monomers and alcohol serve as the raw materials, and a reaction is carried out under the gas and liquid alcohol bi-directional esterification condition to synthesize an alkoxy hydrosilane product. According to the alkoxy hydrosilane single-tower reaction industrial preparing technology, a single tower is adopted, the esterification technology of feeding gas alcohol in a lower tower body, feeding the hydrogen-containing monomers in a middle tower body and feeding liquid alcohol in an upper tower body is carried out, quasi-continuous production can be achieved through an overflow kettle, the mass ratio is strictly controlled in the production process, the equal mole reaction of the two reaction materials is ensured, and thus various side reactions are reduced to the maximum. The method overcomes many defects of an existing preparing method of alkoxy hydrosilane, the production efficiency is effectively improved, and the demand for alkoxy hydrosilane by the market is met.

The invention discloses a sanding belt automatic feeding mechanism comprising a feeding air cylinder, a feeding rack, a winding box, a long wheel gear, two short wheel gears, a feeding fan-shaped wheel gear, a fixed shaft and a feeding shaft, wherein the long wheel gear, the two short wheel gears, the feeding fan-shaped wheel gear, the fixed shaft and the feeding shaft are all located inside the winding box. The fixed shaft penetrates through the long wheel gear and is fixed at the front end of the winding box, wherein unidirectional needle bearings II are installed at two ends of the long wheel gear. The feeding shaft sequentially penetrates through one of the short wheel gears, the feeding fan-shaped wheel gear and the other short wheel gear and is installed at the middle portion of the winding box, wherein a unidirectional needle bearing I is installed on one of the short wheel gears, a unidirectional needle bearing III is installed on the feeding fan-shaped wheel gear and a unidirectional needle bearing I is installed on the other short wheel gear. The two short wheel gears are meshed with the long wheel gear simultaneously. The air cylinder is fixed on the outer side of the rear end of the winding box. The feeding rack is installed at the front end of the feeding air cylinder, located above the winding box and meshed with the feeding fan-shaped wheel gear. According to the sanding belt automatic feeding mechanism, not only manual feeding but also automatic feeding can be achieved. The sanding belt automatic feeding mechanism has the advantages of being convenient to operate, stable in feeding rate, reasonable in structure and easy to manufacture.

The invention provides a cutter applicable to linear cutting operation. The cutter comprises a transmission mechanism which is in a shell and is driven by a motor to perform rotational motion and linear feeding motion, and a cutting assembly which is arranged on one side of the transmission mechanism and is driven by the transmission mechanism to rotate at a high speed. The cutter is characterized in that while an outer shaft and a rotating shaft on the inner and outer sides of a screw drive shaft arranged on the transmission mechanism cooperate to drive the cutting assembly arranged on one side of the transmission mechanism to rotate at a high speed, linear feeding motion is achieved. According to the cutter applicable to linear cutting operation, the structure is simple, different forms of cutting operation can be implemented, and safety is improved.

The invention relates to the technical field of sawing equipment, in particular to a vertical sawing machine, which includes a bed, a saw frame, a tooling table, a clamping unit, a motor and a controller; Saw frame; the left and right sides of the upper part of the bed are provided with mounting bases; two parallel lead screws are arranged between the mounting bases; the tooling table is driven by the lead screw to adjust the feeding position on the bed; Because during the sharp cutting process of clamping a long irregular workpiece, the feed movement of the tooling table and the vibration of the clamping block when sawing the workpiece will destroy the clamping effect, thereby affecting the machining accuracy of the sawing machine; therefore, The present invention strengthens the clamping effect on irregular long workpieces by setting the adjustable pressure block on the clamping block, and through the tooling table installed on the lead screw pair, cooperates with the precise control of the controller to stabilize the clamping force. The feed rate of the workpiece during sawing improves the machining accuracy of the sawing machine.

The invention provides a processing device for an elevator steel cable groove which can renovate and process the steel cable groove used for driving a steel cable wheel in a short time, and can prevent the service quality of the elevator from decreasing. The invention is provided with a mounting part (8) which is demountably arranged on a fixing rack (5) of the elevator, a processing part (9) which is arranged at the opposite position of the steel cable groove part of a main steel cable (2) being used for suspension hanging the case of the elevator and being positioned inside the steel cable groove (4a) of a driving steel cable wheel (4), and a movable bearing part (13) which is arranged on the mounting part and used for bearing the processing part and which can move along the rotating axle direction and the radius direction of the driving steel cable wheel. The processing part is provided with a rotary grinding wheel (10) which is used for grinding and processing the steel cable groove. The rotary axle (16) of grinding wheel forms an angle of about 30 degrees with a tangent (17) starting from the processing point of the driving steel cable wheel.

The invention provides a tri-spindle synchronizer, which is characterized in that sliding bearings are respectively arranged on positions corresponding to a front end cover and a rear end cover; two ends of a drive shaft and a driven shaft which are arranged in parallel are arranged in the holes of the sliding bearing; three oil cavities and two clapboards are fixedly arranged between the front end cover and the rear end cover, and the clapboard is arranged between the oil cavities; an oil inlet is arranged in the middle oil cavity, and an oil outlet is respectively arranged on the other end of each of the oil cavity; an oil cavity passes through all the oil cavities and the clapboards and is communicated with the oil inlet; three drive wheels are arranged on the drive shaft, three driven wheels which are engaged with the drive wheels correspondingly are arranged on the driven shaft, and one pair of engaged gears are arranged in one oil cavity; and each oil cavity is provided with a high-pressure cavity and a low-pressure cavity.