CN204985164U - Pneumatic cylinder piston packaging device with oil leak is just stored up to shape of preapring for an unfavorable turn of events - Google Patents

Abstract

The utility model provides a pneumatic cylinder piston packaging device with oil leak is just stored up to shape of preapring for an unfavorable turn of events mainly includes cylinder, piston, piston rod, U -type sealing ring, trapezoidal sealing washer, U shaped steel ring sum slagging -off ring, and piston rod head is equipped with the shaft shoulder and external screw thread, and elastic ring, piston, cushion and lock nut install on the piston rod in proper order. Its characteristics are that U shaped steel ring prevents that U -type sealing ring warp, and U -type sealing ring can store up the oil leak. The utility model discloses a U -type sealing ring in U type cross -section realizes keeping in of oil leak, realize respectively reducing the U -type sealing ring deformation and preventing its deformation failure through trapezoidal sealing washer and U shaped steel ring, be the triangle circular arc and contain slagging -off ring big, little recess through the cross -section, realize preventing that the dregs of fat from getting into the piston, and the keep in oil leak and the dregs of fat.

Description

A hydraulic cylinder piston sealing device with anti-deformation and oil storage

technical field

The utility model relates to a hydraulic cylinder piston sealing device with anti-deformation and oil leakage storage, in particular to a U-shaped sealing ring with a U-shaped cross-section to realize the temporary storage of oil leakage, which is realized by trapezoidal sealing ring and U-shaped steel ring respectively. Reduce the deformation of the U-shaped sealing ring and prevent its failure. Through the slag removal ring with a triangular arc cross section and large and small grooves, it can prevent oil residue from entering the piston and temporarily store oil leakage and oil residue. It belongs to the hydraulic cylinder seal. technology research and development field.

Background technique

The hydraulic cylinder uses the linear reciprocating motion of the piston to convert hydraulic energy into mechanical energy, but the following problems are prone to occur during use. First, the seal fails, that is, the hydraulic oil leaks from one cavity to the other through the piston. This internal leakage will reduce The performance quality of the hydraulic cylinder; the second is that the oil residue in the hydraulic oil easily enters the contact surface of the piston and the cylinder barrel, wears the surface of the piston, causes the piston seal to fail and reduces the service life of the piston.

Therefore, in view of the problems of seal failure and oil residue wear in existing hydraulic cylinders, comprehensive consideration should be given to the sealing device of the hydraulic cylinder piston, and a piston sealing device with good sealing performance and no oil residue wear should be designed.

Contents of the invention

The utility model aims at problems such as seal failure and oil residue wear of the existing hydraulic cylinders in use, and provides a hydraulic cylinder piston sealing device capable of preventing deformation and storing oil, which can effectively solve the above problems.

A hydraulic cylinder piston sealing device with anti-deformation and oil leakage storage of the utility model adopts the following technical scheme:

A hydraulic cylinder piston sealing device with anti-deformation and oil leakage storage, mainly including a cylinder barrel, a piston, a piston rod, a U-shaped sealing ring, a trapezoidal sealing ring, a U-shaped steel ring and a slag removal ring, and the head of the piston rod is provided with a shaft shoulder and external thread, the elastic ring, piston, elastic pad and lock nut are installed on the piston rod in sequence; the material of the U-shaped sealing ring is rubber, and there are 2 U-shaped sealing rings installed on the side of the piston. The section of the U-shaped sealing ring is a U-shaped structure, and its concave depth is h ₁ , and the wall thickness is b ₁ ; the material of the U-shaped steel ring is 45 steel, and the U-shaped steel ring is installed on the inner side of the U-shaped sealing ring. The distance from the upper end of the U-shaped sealing ring is h ₂ and h ₂ = h ₁ /4, the wall thickness is b ₂ and b ₂ = b ₁ /3; the material of the trapezoidal sealing ring is rubber, and there are 4 trapezoidal sealing rings and 2 One set is installed on both ends of the U-shaped sealing ring, its height is h ₃ and h ₃ = h ₁ /8; the slag removal ring is installed on the front and rear ends of the piston, the cross section of the slag removal ring It is a triangular arc structure with a radius of R , and the outer end of the slag removal ring is provided with large grooves and small grooves from inside to outside.

In the utility model, the U-shaped sealing ring is designed as a U-shaped structure. Through this design, the temporary storage of oil leakage is realized, that is, when a small amount of hydraulic oil leaks through the U-shaped sealing ring, the leaked hydraulic oil will flow to the U-shaped sealing ring. In the inner groove of the type sealing ring, the temporary storage of leaked oil is realized, and it is prevented from leaking into another cavity through the piston.

The utility model installs a U-shaped steel ring in the U-shaped sealing ring. Through this design, the deformation and failure of the U-shaped sealing ring can be prevented. That is, the high strength and high rigidity of the U-shaped steel ring can resist the deformation of the U-shaped sealing ring and prevent its sealing failure. ; And the height of the U-shaped steel ring is designed to be lower than the U-shaped sealing ring. This design can cause the U-shaped sealing ring to produce slight deformation when the piston moves, and reduce the movement resistance of the piston by reducing the contact surface.

The utility model installs trapezoidal sealing rings on both ends of the U-shaped sealing ring respectively, through this design, the deformation of the U-shaped sealing ring is reduced, and the sealing of the piston is strengthened, that is, through the interaction between the trapezoidal sealing ring and the U-shaped sealing ring, the The compression deformation of the U-shaped sealing ring can be consumed in the form of frictional heat energy, reducing the deformation of the U-shaped sealing ring.

In the utility model, the slag removal ring is designed as a structure with a triangular arc in section and large and small grooves. Through this design, the piston moves to remove slag and temporarily store oil leakage, that is, through the arc structure, the piston movement is reduced. Under the premise of resistance, the oil residue on the cylinder can flow into the inner cavity of the cylinder along the arc, preventing the oil residue from entering the contact surface between the piston and the cylinder and causing friction and wear. In addition, the large and small grooves can temporarily store small leakage Oil and grease residue.

The beneficial effects of the utility model are: the temporary storage of oil leakage is realized by the U-shaped sealing ring of the U-shaped section; The slag removal ring with circular arc and large and small grooves can prevent oil residue from entering the piston and temporarily store oil leakage and oil residue.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the utility model.

Fig. 2 is a partially enlarged schematic diagram of the sealing device of the present invention.

Fig. 3 is a partially enlarged schematic diagram of the slag removal ring of the present invention.

Among them: 1. Lock nut, 2. Elastic pad, 3. Slag removal ring, 4. Piston, 5. U-shaped sealing ring, 6. Elastic ring, 7. Piston rod, 8. Trapezoidal sealing ring, 9. U-shaped steel Ring, 10, large groove, 11, small groove, 12, cylinder barrel.

detailed description

Example:

As shown in Figure 1, a hydraulic cylinder piston sealing device with anti-deformation and oil leakage storage of the utility model mainly includes a cylinder barrel 12, a piston 4, a piston rod 7, a U-shaped sealing ring 5, a trapezoidal sealing ring 8, U-shaped steel ring 9 and slag removal ring 3, piston rod 7 head is provided with shaft shoulder and external thread, elastic ring 6, piston 4, elastic pad 2 and lock nut 1 are installed on the piston rod 7 in sequence.

As shown in Figure 2, the material of the U-shaped sealing ring 5 is rubber, and there are two U-shaped sealing rings 5 installed on the side circular surface of the piston 4. The cross-section of the U-shaped sealing ring 5 is a U-shaped structure, and its concave The depth is h ₁ and the wall thickness is b ₁ . When working, this design realizes the temporary storage of oil leakage, that is, when a small amount of hydraulic oil leaks through the U-shaped sealing ring 5, the leaked hydraulic oil will flow into the inner groove of the U-shaped sealing ring 5, thereby realizing oil leakage. Temporary storage to prevent it from leaking into another cavity through the piston 4.

The material of the U-shaped steel ring 9 is 45 steel, and the U-shaped steel ring 9 is installed on the inside of the U-shaped sealing ring 5, and its upper end is h2 from the upper end of the U _- shaped sealing ring ₅ , and h2 ₌ h1 / ₄ , and the wall thickness is b2 And b ₂ = b ₁ /3. When working, this design prevents the deformation and failure of the U-shaped sealing ring 5, that is, through the high strength and high rigidity of the U-shaped steel ring 9, it resists the deformation of the U-shaped sealing ring 5 and prevents its sealing failure; while the height of the U-shaped steel ring 9 is designed Being lower than the U-shaped sealing ring 5, this design can make the U-shaped sealing ring 5 produce slight deformation when moving with the piston 4, and reduce the movement resistance of the piston 4 by reducing the contact surface.

The material of the trapezoidal sealing ring 8 is rubber, and there are 4 trapezoidal sealing rings 8 and 2 are installed on the two ends of the U-shaped sealing ring 5 in a group, and its height is h ₃ and h ₃ = h ₁ /8. When working, this design reduces the deformation of the U-shaped sealing ring 5 and strengthens the sealing of the piston 4, that is, through the interaction between the trapezoidal sealing ring 8 and the U-shaped sealing ring 5, the compression deformation of the U-shaped sealing ring 5 can be converted into frictional heat energy. The consumption of the form reduces the deformation of the U-shaped sealing ring 5.

As shown in Figure 3, the slag removal ring 3 is installed on the front and rear end surfaces of the piston 4, the cross section of the slag removal ring 3 is a triangular arc structure, the radius of the arc is R , and the outer end of the slag removal ring 3 is formed by the Large grooves and small grooves are arranged in turn outside. When working, this design realizes the movement of piston 4 to remove slag and temporarily store oil leakage, that is, through the arc structure, on the premise of reducing the movement resistance of piston 4, the oil residue on the cylinder 12 can flow into the cylinder along the arc. The inner cavity of the barrel 12 prevents oil residue from entering the contact surface between the piston 4 and the cylinder barrel 12 to cause friction and wear. In addition, the large and small grooves can temporarily store small leakage oil and oil residue.

Claims (1)

1. A hydraulic cylinder piston sealing device with anti-deformation and oil leakage storage, mainly including cylinder barrel, piston, piston rod, U-shaped sealing ring, trapezoidal sealing ring, U-shaped steel ring and slag removal ring, the piston rod head is provided with Shaft shoulder and external thread, elastic ring, piston, elastic pad and lock nut are installed on the piston rod in sequence; it is characterized in that: the material of the U-shaped sealing ring is rubber, and there are two U-shaped sealing rings installed on the piston On the side circular surface, the section of the U-shaped sealing ring is a U-shaped structure, and its concave depth is h1 , and the wall thickness is b1 _; the material _of the U-shaped steel ring is 45 steel, and the U-shaped steel ring is installed on the U-shaped seal The distance between the upper end of the U-shaped sealing ring and the upper end of the U-shaped sealing ring is h ₂ and h ₂ = h ₁ /4, and the wall thickness is b ₂ and b ₂ = b ₁ /3; the material of the trapezoidal sealing ring is rubber, and the trapezoidal sealing There are 4 rings and 2 are installed on both ends of the U-shaped sealing ring, the height of which is h ₃ and h ₃ = h ₁ /8; the slag removal ring is installed on the front and rear ends of the piston , the cross-section of the slag removal ring is a triangular arc structure, the arc radius is R , and the outer end of the slag removal ring is provided with large grooves and small grooves in turn from inside to outside.