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329results about How to "Change volume" patented technology

Volume variable additional air chamber of air spring

The invention discloses a volume variable additional air chamber of air spring. The outer part of the volume variable additional air chamber is a cylindrical air storage barrel, the inner cavity of the air storage barrel is circumferentially divided into eight equal sector cylindrical cells by the same partition boards, one side of each partition board is fixed on the inner wall of the air storage barrel, and the other side of each partition board stretches towards the center of the air storage barrel to form a closed cylindrical empty cavity tightly matched with a piston; the top end of the piston stretches out of the air storage barrel and is connected with a stepping motor through a screw rod; an altitude sensor is fixedly arranged on the top end face of the piston; the lower part of the air storage barrel is a lower sealing cover board, and a lower closed empty cavity is formed from the air storage barrel, the piston and the lower sealing cover board; a connecting hole communicated with a main air chamber is arranged in the center of the lower sealing cover board; and eight small holes communicated with the eight sector cylindrical cells in sequence are arranged on the side wall face of the cylindrical empty cavity, and the eight small holes are axially distributed along the cylindrical empty cavity from bottom to top in equal altitude difference. The volume of the additional air chamber can be rapidly changed so as to stabilize the air pressure of the main additional air chamber.
Owner:JIANGSU UNIV

Vehicle-mounted coal quality detection method and device

ActiveCN102636404AAccurate mass calculation resultsBulk Density Data CorrectionMaterial weighingLaser rangingProgrammable logic controller
The invention relates to a vehicle-mounted coal quality detection method. A laser ranging device is used for acquiring height data of the surface of vehicle-mounted coal, and operating is carried out by a computer device according to the acquired height data; the laser ranging device is provided with a box-type cross beam, and the box-type cross beam is provided with multiple ranging laser heads at equal intervals along a straight line; the two ends of the box-type cross beam are respectively provided with a travelling device, the two travelling devices are respectively arranged on two elevated rails which are arranged in parallel; the computer device is internally provided with a serial communication card, a data acquisition card and matched data processing software, and a height data output terminal of each ranging laser head is electrically connected with a height data input terminal of the computer device; and the computer device is internally provided with a PLC (programmable logic controller), and the PLC is used for controlling the travelling device. The vehicle-mounted coal quality detection method disclosed by the invention can realize rapid and accurate detection on quality of vehicle-mounted coal; and the vehicle-mounted coal quality detection method can provide an effective method and approach for monitoring coal quality when being combined with a weighing device.
Owner:榆林力鸿能源检测有限公司

Sleeve type high-temperature and high-pressure resistant extracting pool and external member used for solvent extraction

The invention relates to a sample extraction device which is a sleeve typed high temperature and high pressure resistance extraction tank used for solvent extraction. The invention contains an extraction tank pressure cap, a sealing ring pressure cap, a sample tank, a sample tank fixed sleeve, a sealing ring, a porous filter and so on. The sample tank is in a pot structure. One end of the cavity of the sample tank is a close typed conical structure. The sample tank fixed sleeve is sheathed outside of the sample tank. The two ends of the sample tank fixed sleeve are separately connected with extraction tank pressure cap in screw-threaded connection. The sealing ring pressure cap is arranged between the two ends of the sample tank fixed sleeve and the extraction tank pressure cap. The sealing ring is arranged inside the sealing ring pressure cap. The porous filter is arranged on the sealing ring. A convex sealing knife edge is arranged on the two end faces of the sample tank. Correspondingly, a convex pressure cap sealing knife edge is arranged on the pressure cap. The sealing ring is arranged between the sealing knife edge and the pressure cap sealing knife edge. The invention is convenient to be used and has low manufacture cost and use-cost.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI

Series hydraulic pressure pulsation attenuator and attenuation method

The invention discloses a series hydraulic pressure pulsation attenuator and an attenuation method. The series hydraulic pressure pulsation attenuator comprises a piston rod, a piston and an attenuator shell body; the piston rod is fixed to the attenuator shell body, one end of the piston rod is located in the attenuator shell body, and the other end of the piston rod penetrates out of the attenuator shell body; a through hole is formed in the piston rod in the axis direction and communicates with a follow-up oil line; the piston is located in the attenuator shell body, and a piezoelectric ceramic is arranged between the piston and the attenuator shell body and makes contact with the piston; the rigidity of the piezoelectric ceramic is changed by changing voltage applied to the two ends of the piezoelectric ceramic according to the magnitude of the pressure pulsation, and accordingly piston displacement is changed; and high-frequency change of the volume of the attenuator shell body and attenuation of the hydraulic pressure pulsation are achieved. According to the novel series hydraulic pressure pulsation attenuator, compared with a traditional hydraulic pressure pulsation attenuator, the oil line energy loss caused by the series hydraulic pressure pulsation attenuator is small, the bandwidth of the pressure pulsation playing an inhibition effect is increased, and the pressure pulsation in a high-pressure oil line can be inhibited.
Owner:XI AN JIAOTONG UNIV
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