CN204985694U - High temperature resistant, cold -resistant just wear resistant pneumatic cylinder composite piston device - Google Patents

Abstract

The utility model provides a high temperature resistant, cold -resistant just wear resistant pneumatic cylinder composite piston device includes mainly that piston rod, piston, elastic sleeve, ceramic cover, elastic ring, sealing washer, spring washers and lock nut constitute, and the piston comprises protruding dish in a left side and the butt joint of right protruding dish, and the elastic sleeve divide into left elastic sleeve and right elastic sleeve, and elastic ring and sealing washer are installed in proper order in pottery cover recess. Its characteristics are that the high temperature resistant, cold -resistant and wear -resisting of piston is realized to pottery cover and the sealed with silicone rubber circle on the piston. The utility model discloses a high temperature resistant, cold -resistant and wear -resisting of piston when reducing the whole weight of piston, is realized to composite piston and pottery cover, realize strengthening piston sealing in high temperature, low cold purgation through inverted trapezoid structure's sealed with silicone rubber circle, through elastic ring under the sealing washer and clearance oil storage district, the automatically regulated of realization sealing washer seals and reaches keeping in of oil leak.

Description

A hydraulic cylinder combined piston device with high temperature resistance, cold resistance and wear resistance

technical field

The utility model relates to a high-temperature-resistant, cold-resistant and wear-resistant hydraulic cylinder combined piston device, in particular to a high-temperature-resistant, cold-resistant and wear-resistant piston device that reduces the overall weight of the piston by combining a piston and a ceramic sleeve; Through the silicone rubber sealing ring with an inverted trapezoidal structure, the sealing of the piston at high temperature and low cold is realized; through the elastic ring under the sealing ring and the oil storage area in the gap, the automatic adjustment of the sealing ring and the temporary storage of oil leakage are realized, which belongs to hydraulic pressure Cylinder technology research and development field.

Background technique

Hydraulic cylinders use the linear reciprocating motion of the piston to convert hydraulic energy into mechanical energy. However, due to the singleness of the current piston structure and connecting device, it is easy to cause the following problems: one is high-temperature stuck cylinder, such as at high temperature, limited by the characteristics of the piston material itself, it is easy to cause the thermal expansion of the piston to cause the stuck phenomenon; the other is low-temperature sealing Failure, such as in low cold, prone to piston shrinkage and cause seal failure; third, poor wear resistance, causing seal ring wear and failure.

Therefore, in view of the problems of high-temperature stuck cylinder, low-temperature seal failure and poor wear resistance existing in the use of some existing hydraulic cylinder pistons, a high-temperature-resistant, low-temperature Cold and wear-resistant hydraulic cylinder piston device.

Contents of the invention

The utility model aims at problems such as high-temperature stuck cylinder, low-temperature seal failure and poor wear resistance existing in the use of some existing hydraulic cylinder pistons, and provides a high-temperature-resistant, cold-resistant and wear-resistant hydraulic pressure pump that can effectively solve the above problems. Cylinder combined piston device.

A high temperature-resistant, cold-resistant and wear-resistant hydraulic cylinder combined piston device of the utility model adopts the following technical solutions:

A high temperature resistant, cold resistant and wear-resistant hydraulic cylinder combined piston device, mainly composed of a piston rod, a piston, an elastic sleeve, a ceramic sleeve, an elastic ring, a sealing ring, an elastic washer and a lock nut. The piston consists of a left convex plate and a right The elastic sleeve is divided into a left elastic sleeve and a right elastic sleeve. The elastic ring and the sealing ring are installed in the groove of the ceramic sleeve in turn; the head end of the piston rod is provided with two external threads connected to the lock nut. A lock nut, an elastic washer, a left cam, a right cam, an elastic washer and a lock nut are installed on the head of the piston rod in sequence from the inside to the outside; the left and right cams are made of medium carbon steel, and their structure It is a hollow stepped cylinder, the left convex plate and the right convex plate are connected by a small cylindrical surface, and the left elastic sleeve and the right elastic sleeve are installed on the docking surface; the left elastic sleeve and the right elastic sleeve are made of rubber material, and their structure It is a hollow stepped cylinder; the elastic washer is made of rubber material; the ceramic sleeve is made of ceramic material, which is a cylindrical structure, and the two ends of the cylinder are provided with concave platforms that clamp the large cylindrical surfaces of the left convex plate and the right convex plate , the outer surface of the ceramic sleeve is provided with two round grooves with an inverted trapezoidal cross section; the elastic ring is made of rubber material and has a rectangular cross section; the sealing ring is made of silicon rubber material and has an inverted trapezoidal cross section; On the ring, and there is a gap oil storage area between the elastic ring and the groove of the ceramic sleeve.

The utility model is provided with two external threads at the head end of the piston rod. Through this design, the two ends of the piston are fixed by lock nuts, and the tightening and adjustment of the piston can be facilitated by the lock nuts.

In the utility model, the piston is designed as a structure in which stepped cylindrical left convex discs and right convex discs are butted and combined. This design not only facilitates the installation of the ceramic sleeve, but also reduces the weight of the piston.

The utility model is equipped with a left elastic sleeve and a right elastic sleeve at the junction of the left convex plate and the right convex plate. Through this design, the direct collision between the left convex plate and the right convex plate can be prevented from being damaged, and the contact between the ceramic sleeve and the left convex plate can be eliminated. The contact collision between the convex plate and the right convex plate consumes the impact kinetic energy in the form of thermal energy and elastic energy through the friction and elastic deformation between the inner molecules of the left elastic sleeve and the right elastic sleeve.

The utility model installs a ceramic sleeve of ceramic material outside the piston. Through this design, the high temperature resistance, cold resistance and wear resistance of the piston are realized, that is, the ceramic material is less affected by thermal expansion and contraction, and it can be used in an environment with severe temperature changes. The advantage of still being able to work enables the piston to work in high temperature and low cold environments; taking advantage of the high elastic modulus of ceramic materials and the characteristics that it is not easily deformed under force, the piston’s durability can be realized on the basis of increasing the movement speed of the piston. Grinding, prolonging the service life; in addition, using the characteristics of low density of ceramic materials to reduce the weight of the piston.

In the utility model, the sealing ring is designed to be made of silicon rubber material and has an inverted trapezoidal cross-section. Through this design, the high-temperature and cold-resistant piston seal can be realized, and the sealing effect can be enhanced. That is to use the excellent heat resistance and low temperature elasticity of silicone rubber, such as its applicable temperature range of -60 ° C ~ 225 ° C, to achieve high temperature and low temperature sealing; use the design of the larger contact surface between the inverted trapezoid and the cylinder to strengthen Piston seal.

The utility model installs a rubber material elastic ring under the sealing ring, through this design, the automatic adjustment and sealing of the sealing ring is realized, that is, the expansion deformation or shrinkage of the sealing ring is supplemented by the elastic deformation of the elastic ring.

The utility model leaves a gap oil storage area between the elastic ring and the groove of the ceramic sleeve to realize the temporary storage of the oil leakage of the sealing ring.

The beneficial effects of the utility model are: by combining the piston and the ceramic sleeve, while reducing the overall weight of the piston, the high temperature resistance, cold resistance and wear resistance of the piston are realized; Sealing under the cold; through the elastic ring under the sealing ring and the gap oil storage area, the automatic adjustment of the sealing ring and the temporary storage of oil leakage are realized.

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 joint between the piston and the ceramic sleeve of the utility model.

Fig. 3 is a partially enlarged schematic diagram of the junction of the elastic ring and the sealing ring of the present invention.

Among them: 1. Right convex plate, 2. Right elastic sleeve, 3. Ceramic sleeve, 4. Left elastic sleeve, 5. Left convex plate, 6. Elastic washer, 7. Lock nut, 8. Piston rod, 9. Elastic Ring, 10, sealing ring, 11, cylinder barrel, 12, clearance oil storage area.

detailed description

Example:

As shown in Figure 1, a high-temperature-resistant, cold-resistant and wear-resistant hydraulic cylinder combined piston device of the present utility model mainly includes a piston rod 8, a piston, an elastic sleeve, a ceramic sleeve 3, an elastic ring 9, a sealing ring 10, an elastic The washer 6 and the lock nut 7 are composed, the piston is formed by the docking of the left convex plate 5 and the right convex plate 1, the elastic sleeve is divided into the left elastic sleeve 4 and the right elastic sleeve 2, and the elastic ring 9 and the sealing ring 10 are installed on the ceramic sleeve 3 in sequence inside the groove.

The head end of the piston rod 8 is provided with two external threads connecting the lock nut 7, and the head end of the piston rod 8 is sequentially installed with the lock nut 7, the elastic washer 6, the left convex plate 5, the right convex plate 1, Elastic washer 6 and lock nut 7, elastic washer 6 adopt rubber material. This design can realize that the two ends of the piston are fixed by the lock nut 7, and the tightening adjustment of the piston can be facilitated by the lock nut 7.

As shown in Figure 2, the left convex plate 5 and the right convex plate 1 are made of medium carbon steel, and their structure is a hollow stepped cylinder. The left convex plate 5 and the right convex plate 1 are connected by a small cylindrical surface. This design is both The installation of the ceramic sleeve 3 can be facilitated, and the weight of the piston can be reduced.

The left elastic sleeve 4 and the right elastic sleeve 2 are installed at the butt joint of the left convex plate 5 and the right convex plate 1. The left elastic sleeve 4 and the right elastic sleeve 2 are made of rubber material, and their structure is a hollow stepped cylinder. , this design can not only prevent the left convex plate 5 from being damaged by direct collision with the right convex plate 1, but also eliminate the contact collision between the ceramic sleeve 3 and the left convex plate 5 and the right convex plate 1, that is, through the left elastic sleeve 4 and the right elastic The friction and elastic deformation between the inner molecules of the sleeve 2 consumes the impact kinetic energy in the form of thermal energy and elastic energy.

The ceramic sleeve 3 is made of ceramic material, which is a cylindrical structure, and the two ends of the cylinder are provided with a concave platform that blocks the large cylindrical surface of the left convex plate 5 and the right convex plate 1, and the outer surface of the ceramic sleeve 3 is provided with 2 cross sections for inverted The trapezoidal circular groove, when working, this design realizes the high temperature resistance, cold resistance and wear resistance of the piston, that is, the advantage that the ceramic material is less affected by thermal expansion and contraction, and can still work in an environment with severe temperature changes. Realize that the piston can work in high temperature and low cold environment; take advantage of the high elastic modulus of ceramic materials and the characteristics that it is not easily deformed under force, and on the basis of increasing the movement speed of the piston, the wear resistance of the piston can be realized and the service life can be extended; In addition, the lower density of the ceramic material is used to reduce the weight of the piston.

As shown in FIG. 3 , the sealing ring 10 is made of silicone rubber and has an inverted trapezoidal cross section. This design can not only realize high temperature and cold resistant piston sealing, but also enhance the sealing effect. That is to use the excellent heat resistance and low temperature elasticity of silicone rubber, such as its applicable temperature range of -60 ° C ~ 225 ° C, to achieve high temperature and low cold sealing; use the design of the large contact surface between the inverted trapezoid and the cylinder 11 to Strengthen the seal of the piston.

The sealing ring 10 is installed on the elastic ring 9 of rubber material. The elastic ring 9 is made of rubber material and has a rectangular cross section. The elastic ring 9 is installed under the sealing ring 10. This design can realize the automatic adjustment and sealing of the sealing ring 10, that is, through The elastic deformation of the elastic ring 9 complements the expansion deformation or shrinkage of the sealing ring 10 . There is a gap oil storage area 12 between the elastic ring 9 and the groove of the ceramic sleeve 3, which can realize the temporary storage of oil leakage from the sealing ring 10.

Claims (1)

1. A hydraulic cylinder combined piston device with high temperature resistance, cold resistance and wear resistance, which mainly includes a piston rod, a piston, an elastic sleeve, a ceramic sleeve, an elastic ring, a sealing ring, an elastic washer and a lock nut. The piston consists of a left convex plate The elastic sleeve is divided into a left elastic sleeve and a right elastic sleeve, and the elastic ring and the sealing ring are sequentially installed in the groove of the ceramic sleeve; the characteristic is that: the head end of the piston rod is provided with two connecting locks For the external thread of the lock nut, the piston rod head is sequentially installed with a lock nut, an elastic washer, a left cam, a right cam, an elastic washer and a lock nut from the inside to the outside; Carbon steel material, its structure is a hollow stepped cylinder, the left convex plate and the right convex plate are connected by a small cylindrical surface, and the left elastic sleeve and the right elastic sleeve are installed on the butt joint surface; the left elastic sleeve and the right elastic sleeve Rubber material is used, and its structure is a hollow stepped cylinder; the elastic gasket is made of rubber material; the ceramic sleeve is made of ceramic material, which is a cylindrical structure, and the two ends of the cylinder are provided with a left convex plate and a right convex plate. The concave platform of the large cylindrical surface is provided with two round grooves with an inverted trapezoidal section on the outer surface of the ceramic sleeve; the elastic ring is made of rubber material and has a rectangular section; the sealing ring is made of silicone rubber and has an inverted trapezoidal section; the sealing ring It is installed on the elastic ring of rubber material, and there is a gap oil storage area between the elastic ring and the groove of the ceramic sleeve.