32results about How to "No turning phenomenon" patented technology

The invention relates to a method for measuring the specific heat ratio of air by the vibration of a piston in a cylinder. The method comprises the steps of connecting the two ends of a horizontally arranged transparent cylinder with gas containers respectively, forming an air hole which can be sealed in the outer side of each gas container, and arranging a horizontal bubble in the cylinder; unscrewing the gas containers respectively arranged at the two ends of the cylinder, plugging a piston body into the opening end of the cylinder, and overlapping the center of the piston body and the center of the cylinder; then, screwing the gas containers respectively arranged at the two ends of the cylinder, then screwing sealing caps respectively arranged at the outer sides of the gas containers at the two ends of the cylinder, turning on a power supply of a piece of electromagnet arranged at the outer side of the cylinder so as to move the piston body by the magnetic field, and cutting off the power supply to enable the piston body to vibrate under the elasticity of air. The specific heat ratio gamma of air is equal to 2mV / (r4T2P), wherein m is the mass of the piston body, r is the internal radius of the cylinder, V is the volume of the single-side sealed air, T is period of vibration, and P is atmospheric pressure value of the outside air. The method has the beneficial effects that the sealed air has good elasticity, the experiment principle is precise, a strict harmonic vibration is realized, the structure is simple, and the cost is low.

The invention discloses a stainless steel plate spring clamp. The stainless steel plate spring clamp comprises a U-shaped clamp body and a fixing device, wherein the fixing device comprises a rear sealing base, a stress rod and attaching plates, one end of the stress rod is fixedly installed on the front side of the rear sealing base, and reinforcing flat plates are fixedly installed at the positions, located on the two sides of the stress rod, of the front side of the rear sealing base; the reinforcing flat plates are fixedly connected with the stress rod, strip-shaped rotating grooves are formed in the bottoms of the attaching plates, supporting strips are fixedly installed at the tops of the reinforcing flat plates, rotating rods are fixedly installed at the tops of the supporting strips, the rotating rods are installed in the strip-shaped rotating grooves, arc-shaped circular grooves are formed in the tops of the reinforcing flat plates, springs are fixedly connected to the inner side walls, away from the opening ends, of the arc-shaped circular grooves, and arc-shaped rods are fixedly connected to the bottoms of the attaching plates. The stainless steel plate spring clamp is reasonable in design, long in service life and capable of effectively reducing the possibility of loosening.

The invention discloses a method for measuring an air specific heat ratio by vibration of a piston in a single-end sealed vertical cylinder. A horizontal bubble is arranged at the upper end face of the outer side of a cylinder with internal diameter r, an air hole and a millimeter dividing ruler are arranged at the vertical side surface of the cylinder, the cylinder is vertically fixed on a bracket; a sealing piston is arranged inside the cylinder, a metal half-sphere is fixed at the lower end of the piston, the symcenter of the outer surface of the half-sphere is fixed with one end of a pull rod, the other end of the pull rod is fixed with a pull ring; an air hole is opened, the piston is pushed into any position inside the cylinder by virtue of the pull rod, then a sealing cap of the air hole is sealed, the pull ring at the tail end of the pull rod is pulled, and then immediately released, the piston can vibrate under an elastic function of sealed air; the air specific heat ratio gamma is equal to 4 pi mh / (r<2>T<2>P). The method has the beneficial effects that the air is in a sealed state, the sealed air has good elasticity; an experiment principle is relatively precise; the vibration is strict simple harmonic vibration; the phenomenon of rotation of the prior art can not be caused; no inflating device is needed, the structure is relatively simple and the cost is relatively low.

The invention provides an oil pipe. The oil pipe comprises a first oil pipe, a second oil pipe, a connector, a first groove, a projection and an anti-rotation body, wherein the first oil pipe and the second oil pipe longitudinally extend, the connector is provided with a first end and a second end which are opposite, the first end is used for being connected with the first oil pipe, the first groove recessed from the end face of the second end to the first end is formed on the side wall of the connector, the projection protrudes out of the side wall of the second oil pipe and is provided with a first operating surface and a second operating surface which are opposite in the circumference of the second oil pipe, a notch is formed by the first operating surface, the second operating surface and the side wall of the second oil pipe adjacent to the first operating surface and the second operating surface; the anti-rotation body can be received in the first groove and the notch. By the oil pipe, the purpose for preventing rotation of the oil pipe at the joint is achieved.

The method of measuring air specific heat ratio by piston vibration in a sealed cylinder at one end. A transparent cylinder with an inner radius r is placed horizontally and divided into two sections. One section is a hollow cylinder with a bottom seal, and the other section is a hollow circular tube. Threaded sealing connection; the outer surface of the cylinder has a millimeter scale and a horizontal bubble along the length direction; the piston body is composed of two pistons and a stainless steel connecting rod; after the threaded connection of the cylinder is unscrewed, the hollow circle of the cylinder The pipe end is inserted into the piston body, and then the cylinder is sealed by threads, and a magnet is inserted into the hollow pipe end of the cylinder. The magnetic field attracts the stainless steel connecting rod and pulls the piston body to move. The piston body will break away from the magnet, and the piston body will vibrate. ; Air specific heat capacity ratio γ is γ=4πmL / (r 2 T 2 P), where m is the mass of the piston body, L is the length of the sealed air at the equilibrium position, r is the inner radius of the cylinder, T is the vibration period, and P is the atmospheric pressure value of the outside air. The beneficial effect is that the sealed air has good elasticity; the experimental principle is more rigorous; it is a strict simple harmonic vibration; the vibration starting method is simple and easy; the structure is simpler and the cost is lower.