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Nuoguan cylinder type single-acting cylinder function introduction

The NORGREN cylindrical single-acting cylinder converts thermal energy into mechanical energy by expansion; the gas is compressed by the piston in the compressor cylinder to increase the pressure. The housing of a turbine, a rotary piston engine or the like is also commonly referred to as a cylinder. NORGREN cylindrical single-acting cylinder pneumatic transmission converts the pressure energy of compressed gas into a pneumatic actuator of mechanical energy. The cylinder has two types of reciprocating linear motion and reciprocating swing. The cylinders for reciprocating linear motion can be divided into four types: single acting, double acting, diaphragm type and impact cylinder. 1 Single-acting cylinder: only one end has a piston rod, which can generate air pressure from the side of the piston. The air pressure pushes the piston to generate thrust and returns by spring or self-weight. 2 double-acting cylinder: alternately supply air from both sides of the piston, outputting force in one or two directions. 3 Diaphragm cylinder: replace the piston with a diaphragm, output the force in only one direction, and reset with a spring. Its sealing performance is good, but the stroke is short. 4 Impact cylinder: This is a new type of component. It converts the pressure energy of the compressed gas into the kinetic energy of the high-speed (10-20 m/s) movement of the piston. The impact cylinder adds a middle cover with a spout and a drain. The middle cover and the piston divide the cylinder into three chambers: a gas storage chamber, a head chamber and a tail chamber. It is widely used in a variety of operations such as blanking, punching, crushing and forming.

The gas in the right chamber of the NORGREN cylinder type single-acting cylinder is discharged through the plunger hole 4 and the air hole 8 in the cylinder head. When the piston moves close to the end of the stroke, when the buffer plunger 3 on the right side of the piston blocks the plunger hole 4 and the piston continues to move to the right, the remaining gas sealed in the right chamber of the cylinder is compressed and slowly passes through the throttle valve 6 And the air hole 8 is discharged, and the pressure energy generated by the compressed gas is balanced with all the energy of the piston movement, so that the buffering effect is obtained, so that the piston moves smoothly at the end of the stroke without impact. By adjusting the opening degree of the throttle valve of the throttle valve 6, the amount of the exhaust gas can be controlled, thereby determining the pressure in the compressed volume (called the buffer chamber) to adjust the buffering effect. If the piston is moved in the reverse direction, the compressed air is input from the air hole 8, and the check valve 5 can be directly opened to push the piston to the left. For example, the valve opening of the throttle valve 6 is fixed and cannot be adjusted, which is called a non-adjustable buffer cylinder.

The NORGREN cylinder type single-acting cylinder refers to a cylinder in which two chambers can respectively input compressed air to realize two-way movement. Its structure can be divided into double piston rod type, single piston rod type, double piston type, buffer type and non-buffer type. These cylinders are the most widely used. The cylinder double piston rod cylinder has two kinds of cylinder fixing and piston rod fixing. When the cylinder is fixed, the load (such as the workbench) is integrated with the two piston rods of the cylinder, and the compressed air enters the two chambers of the cylinder in turn (one chamber is exhausted and the other chamber is exhausted), and the piston rod drives the table to move left and right. The range of motion of the table is equal to three times the effective stroke s. The installation takes up a lot of space and is generally used on small devices. When the piston rod is fixed, the pipeline connection is convenient, the piston rod is made hollow, the cylinder body is integrated with the load (table), and the compressed air enters the two chambers of the cylinder from the left end or the right end of the hollow piston rod, so that the cylinder body drives the worktable. Moving to the left or left, the motion range of the table is twice that of its effective stroke s. Suitable for medium and large equipment. Since the cylinders have the same diameter of the piston rods at both ends, the force areas on both sides of the piston are equal. When the input pressure and flow rate are the same, the round-trip motion output force and speed are equal.

The NORGREN cylinder type single-acting cylinder end cover is provided with an intake and exhaust port, and the oil is also provided with a buffer mechanism in the end cover. The rod side end cover is provided with a sealing ring and a dustproof ring to prevent the piston from being removed. The rod leaks outward and prevents external dust from mixing into the cylinder. The rod side end cover is provided with a guiding sleeve to improve the guiding precision of the cylinder, to bear a small amount of lateral load on the piston rod, and to reduce the downward bending when the piston rod is extended. Quantity, extend the life of the cylinder. The guide sleeve usually uses sintered oil-bearing alloy, forward-tilted copper castings. End caps used to be malleable cast iron. Now, to reduce weight and rust, aluminum alloy die-casting is often used, and micro-cylinders are made of brass.

NORGREN cylindrical single-acting cylinder end cover end cover is provided with inlet and outlet ports, and some also have a buffer mechanism in the end cover. A seal ring and a dust seal are provided on the rod side end cover to prevent air leakage from the piston rod and prevent external dust from entering the cylinder. A guide sleeve is arranged on the rod side end cover to improve the guiding precision of the cylinder, to bear a small amount of lateral load on the piston rod, to reduce the amount of downward bending when the piston rod is extended, and to prolong the service life of the cylinder. Guide sleeves typically use sintered oil-containing alloys, forward-lead copper castings. End caps used to be malleable cast iron. Nowadays, in order to reduce weight and prevent rust, aluminum alloy die-casting is often used, and micro-cylinders are made of brass.

The NORGREN cylindrical single-acting cylinder does not take the necessary measures for the cylinder with a high speed near the end of the stroke. The piston will hit the end cap with a large force (energy), causing vibration and damage to the mechanism. In order to make the piston move smoothly at the end of the stroke, no impact is generated. A buffer device is added at both ends of the cylinder, which is generally called a buffer cylinder. The buffer cylinder is shown in Fig. 42.2-4, and is mainly composed of a piston rod 1, a piston 2, a buffer plunger 3, a check valve 5, a throttle valve 6, an end cover 7, and the like. The working principle is that when the piston moves to the right under the push of compressed air, the gas in the right chamber of the cylinder is discharged through the plunger hole 4 and the air hole 8 on the cylinder head. When the piston moves close to the end of the stroke, when the buffer plunger 3 on the right side of the piston blocks the plunger hole 4 and the piston continues to move to the right, the remaining gas sealed in the right chamber of the cylinder is compressed and slowly passes through the throttle valve 6 And the air hole 8 is discharged, and the pressure energy generated by the compressed gas is balanced with all the energy of the piston movement, so that the buffering effect is obtained, so that the piston moves smoothly at the end of the stroke without impact. By adjusting the opening degree of the throttle valve of the throttle valve 6, the amount of the exhaust gas can be controlled, thereby determining the pressure in the compressed volume (called the buffer chamber) to adjust the buffering effect.

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