SMC cylinder structure is compact, lightweight and beautiful
a. When the piston ring of SMC cylinder breaks or the clearance between the piston ring and the piston ring groove is too large, it will cause a certain knocking sound.
b. After the upper part of the SMC cylinder wears out, there is almost no wear on the areas where the piston ring and cylinder do not come into contact, forming a step. If the repair is not done properly and the piston ring collides with the cylinder step, a pure dull "pop, pop" metal collision sound will be emitted. As the speed increases, the sound also increases.
(2) Leakage sound of piston ring
a、 Reasons and characteristics: Weakened elasticity of the piston ring leads to poor sealing between the piston ring and the cylinder wall, excessive clearance or overlapping openings of the piston ring, scratches and grooves on the cylinder wall, etc., all of which can cause leakage of the piston ring. There will be a hollow "drink, drink" or "squeak, squeak" sound, and in severe cases, there will be a more obvious "plop, plop" sound.
b、 Method for fault inspection: Inject a small amount of lubricating oil into the cylinder. If the sound decreases or disappears but soon appears, it indicates that the piston ring is leaking air
(3) Abnormal noise caused by excessive carbon buildup on the piston ring
a. Characteristics of SMC cylinder sound: The sound of excessive carbon buildup is a sharp sound
Sometimes the sound and engine are not easy to shut down and park.
b、 The main reason for carbon deposition is that the sealing between the piston ring and the cylinder wall is not tight, the opening clearance is large, the piston ring is installed backwards, the opening overlaps, causing lubricating oil to enter the combustion chamber, or due to the gasoline grade not meeting the requirements, the mixture is too rich, and the air filter is too dirty.
(4) Single cylinder misfire test, the sound decreases but does not disappear. Place the screwdriver on the spark plug or fuel injector and listen. If there is a "pop, pop" sound, it can be determined that the piston ring is broken.
(5) As observed before, if there is a "sound" and there is no change after the fire is cut off, it can be determined that the piston ring is colliding with the cylinder shoulder.
(6) When the engine is started cold, a "noise" is emitted, and blue smoke can be seen at the oil filling port. Its frequency matches the sound frequency. When conducting a misfire test, the noise disappears, and the smoke at the oil filling port decreases or disappears. It can be determined that the cylinder piston ring is leaking air and making abnormal noise.
SMC cylinders have derived five variant series of thin cylinders through module combination and standardized design, forming the DQGI group cylinder to meet the needs of users for different functions, purposes, and occasions of thin cylinders. This enriches the variety of thin cylinders and expands their application range. Its characteristics are: small axial size, compact structure, lightweight and beautiful, and can be equipped with a magnetic signal generation device
Thin cylinder structure is compact, lightweight and beautiful
2. Technical parameters
Order itinerary S=actual itinerary+2t
T is the operating range of the magnetic switch, usually 6-15mn. During installation and debugging, only axial movement is required
The magnetic switch can achieve the actual required travel range by fixing the magnetic switch.
DQGI series thin cylinder
3. Model labeling
SMC cylinder dual piston type, cylinder diameter 50, stroke S1=55, S2=60 DQGIH - K50 × 55 × 60
4. Appearance and connection dimensions
4.3 Adjustable stroke thin cylinder (DQGITO32-D100)
This product has a longer piston rod thread on one end and is equipped with a material adjustment gauge nut to adjust the stroke of the cylinder's forward direction.
4. Three position thin cylinder
The three thin cylinders are composed of two cylinders with the same diameter connected in series. The front and rear pistons have separate piston rods, and the two cylinders are isolated and sealed. The two pistons can move independently. Due to the front cylinder stroke S being greater than the rear cylinder stroke S1, there are three positions at the end of the front cylinder piston rod. The total stroke force of the front cylinder is S, and the stroke of the rear cylinder is S1 One step driving stroke, S2 force II The step driven stroke is S2=S-S1, and the three thin cylinders can be precisely connected to each position Accurate driving and stopping positioning.
4.5 Guided Thin Cylinder
The SMC cylinder is connected to the guide plate through the piston rod, and drives the load to run smoothly under the guidance of the two guide rods and the cylinder body, eliminating the rotation of the piston rod and reducing the angle error, thus enabling the connected load to have guiding and smooth performance.
4.6 Double piston thin cylinder (DQGIH 〇 32-〇 100)
SMC cylinder is composed of two DQGI thin cylinders with the same diameter, the same or different stroke, connected in series at the tail end. Two cylinders are controlled independently by two directional valves, and the direction of motion and stroke load of the two cylinders are independent. It can also be controlled in parallel by a valve, and the direction of movement of the piston rods of the two cylinders can be the same or opposite. At this time, the stroke of the two cylinders should be the same. If the piston rod of one cylinder is fixed and the four intake and exhaust ports are coordinated to control the intake and exhaust, the other piston rod end can have four positions as a return cylinder to achieve position control.