CN115949648A - Hydraulic cylinder guide ring and preparation method thereof - Google Patents
Hydraulic cylinder guide ring and preparation method thereof Download PDFInfo
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- CN115949648A CN115949648A CN202211438406.9A CN202211438406A CN115949648A CN 115949648 A CN115949648 A CN 115949648A CN 202211438406 A CN202211438406 A CN 202211438406A CN 115949648 A CN115949648 A CN 115949648A
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- guide ring
- hydraulic cylinder
- cylinder guide
- groove
- ring body
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- 238000002360 preparation method Methods 0.000 title description 5
- 239000000463 material Substances 0.000 claims abstract description 84
- 239000000835 fiber Substances 0.000 claims description 20
- 239000004696 Poly ether ether ketone Substances 0.000 claims description 16
- 229920002530 polyetherether ketone Polymers 0.000 claims description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims description 15
- 239000002131 composite material Substances 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 12
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 11
- 239000004917 carbon fiber Substances 0.000 claims description 11
- 229920001431 Long-fiber-reinforced thermoplastic Polymers 0.000 claims description 9
- 239000004642 Polyimide Substances 0.000 claims description 9
- 229920001721 polyimide Polymers 0.000 claims description 9
- 238000005470 impregnation Methods 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 8
- 238000001125 extrusion Methods 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 229920002748 Basalt fiber Polymers 0.000 claims description 6
- 239000003733 fiber-reinforced composite Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 239000011159 matrix material Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 238000001746 injection moulding Methods 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 239000011246 composite particle Substances 0.000 claims description 3
- 239000008188 pellet Substances 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 2
- 229920006231 aramid fiber Polymers 0.000 claims description 2
- 238000005520 cutting process Methods 0.000 claims description 2
- 238000011049 filling Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 2
- 239000002994 raw material Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 description 10
- 229920006259 thermoplastic polyimide Polymers 0.000 description 10
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 8
- 238000011068 loading method Methods 0.000 description 6
- 239000004416 thermosoftening plastic Substances 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 description 5
- 239000004744 fabric Substances 0.000 description 4
- 230000001050 lubricating effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000004677 Nylon Substances 0.000 description 3
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 3
- 229920001778 nylon Polymers 0.000 description 3
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 3
- 229920006324 polyoxymethylene Polymers 0.000 description 3
- 238000002791 soaking Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 239000012760 heat stabilizer Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000002861 polymer material Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000012863 analytical testing Methods 0.000 description 1
- 239000004760 aramid Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000003017 thermal stabilizer Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D22/00—Producing hollow articles
- B29D22/04—Spherical articles, e.g. balls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
- F15B15/20—Other details, e.g. assembly with regulating devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Reinforced Plastic Materials (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention relates to a hydraulic cylinder guide ring, which comprises a ring body made of a first material, wherein the ring body is provided with a working surface, a groove is formed in the working surface, and a second material is filled in the groove; the first material has a greater compressive strength than the second material; the second material has a lower coefficient of friction than the first material.
Description
Technical Field
The invention belongs to the field of engineering machinery, and particularly relates to a hydraulic cylinder guide ring and a preparation method thereof.
Background
The guide ring, also known as a support ring and a guide belt, is usually installed at the piston seal and the piston rod seal of the hydraulic cylinder, and mainly used for guiding the piston and the piston rod to do linear motion, so that hydraulic oil leakage caused by the fact that the seal is excessively extruded to cause quick seal failure due to unbalance loading of the piston and the piston rod is prevented.
In the related art, the guide ring is made of phenolic sandwich cloth, polyformaldehyde composite material or modified nylon material.
Disclosure of Invention
The inventor finds that in the tropical area, the failure of the guide ring is one of the main factors that the temperature of the surface of the oil cylinder can reach more than 70 ℃, and the reciprocating friction and the heat accumulation of the guide ring cause the instantaneous temperature of a working surface to be more than 150 ℃, so that the guide ring is softened and melted, and the guide ring is irreversibly deformed, thereby causing the sealing failure. The guide ring for tropical applications should therefore have improved high-temperature compression properties.
In addition, during the reciprocating motion of the piston rod, unbalance loading is easily generated at the guide sleeve and the piston, and the guide ring also has improved wear resistance.
In the related art, the guide ring is made of phenolic clamping cloth, polyformaldehyde composite material or modified nylon material. The phenolic clamping cloth and the polyformaldehyde composite material guide ring have poor wear resistance, high friction coefficient and short service life, while the modified nylon has low thermal deformation temperature and is difficult to use for a long time at high temperature and high pressure.
The invention provides a novel guide ring, wherein a groove is preset in the working surface of the guide ring and a lubricating material is embedded in the groove, so that the high-temperature compressive strength of the guide ring is improved, and the wear resistance is improved. In some embodiments, this disclosure uses long fiber reinforced thermoplastic composite for guide ring main part bearing structure, according to the guide ring installation position difference, predetermines the slot of specific size at the working face of guide ring, guarantees that the support nature on guide ring both sides improves anti unbalance loading ability, imbeds lubricating material in the slot simultaneously, promotes self-lubricating performance.
The present disclosure provides a hydraulic cylinder guide ring having a novel structure. The hydraulic cylinder guide ring has an improved service life.
In a first aspect, the invention provides a hydraulic cylinder guide ring comprising a ring body (10) of a first material,
the ring body (10) is provided with a working surface (11), a groove (12) is formed in the working surface (11), and a second material (20) is filled in the groove (12);
the first material has a greater compressive strength than the second material (20);
the second material (20) has a lower coefficient of friction than the first material.
Based on the scheme, the groove is preset in the working surface of the guide ring, the lubricating material with the smaller friction coefficient is embedded in the groove, and the high-temperature compressive strength of the guide ring is improved while the wear resistance is improved.
In some embodiments, according to different guide ring installation positions, grooves with specific sizes are preset on the working surface of the guide ring, so that the support performance of two sides of the guide ring is guaranteed, the unbalance loading resistance is improved, and meanwhile, a lubricating material with a small friction coefficient is embedded into the grooves, and the self-lubricating performance is improved.
In some embodiments, the ratio of the compressive strength of the first material to the second material is 2.
In some embodiments, the ratio of the coefficient of friction of the first material to the second material is 1.5.
In some embodiments, the compressive strength of the first material is 60MPa or greater, such as 70MPa or greater, such as 80MPa or greater, such as 60-100MPa.
In some embodiments, the compressive strength of the second material is above 5Mpa, such as above 10Mpa, such as above 15Mpa, such as 10-30Mpa.
In some embodiments, compressive strength refers to the strength in MPa required to produce 10% strain when compressed at 150 ℃. Compressive strength can be obtained according to methods common in the art, for example according to the GB/T1041-2008 test for determination of compression properties of plastics.
In some embodiments, the second material has a coefficient of friction of 0.12 or less, e.g., 0.01 to 0.02, 0.02 to 0.03, 0.03 to 0.04, 0.04 to 0.05, 0.05 to 0.06, 0.06 to 0.07, 0.07 to 0.08, 0.08 to 0.09, 0.09 to 0.1, 0.1 to 0.11, or 0.11 to 0.12.
In some embodiments, the first material has a coefficient of friction of 0.30 or less, e.g., 0.01 to 0.04, 0.04 to 0.07, 0.07 to 0.1, 0.1 to 0.13, 0.13 to 0.16, 0.16 to 0.19, 0.19 to 0.22, 0.22 to 0.25, 0.25 to 0.28, or 0.28 to 0.30.
In some embodiments, the grooves are filled, e.g., leveled, with the second material.
In some embodiments, one or more grooves are provided on the working surface. The plurality of slots may be arranged in an array.
In some embodiments, the cross-sectional shape of the groove may be circular, square, polygonal, bar-shaped.
In some embodiments, the groove is a strip-shaped groove extending in a circumferential direction of the ring body. Circumferential means the direction around one circle.
In some embodiments, the strip groove is located in a middle portion of the ring body along a width direction of the ring body. In other words, the distance from the two side edges of the strip-shaped groove to the two side edges of the working surface is equal.
In some embodiments, the distance between any side edge of the strip-shaped groove and any side edge of the working surface in the width direction of the annular body is greater than zero. In some embodiments, in the width direction of the ring body, a distance between one side edge of the strip-shaped groove and an edge of the closest working face is more than 1/8 of the width of the ring body, for example more than 1/4. In some embodiments, each side edge of the strip-shaped groove is spaced apart from the edge of the closest working face by more than 1/8, such as more than 1/4, of the width of the ring body in the width direction of the ring body. Based on above-mentioned scheme, the working face can provide good support for the ring body.
In some embodiments, the total length of the strip groove is 75% to 100% of the total perimeter of the working face.
In some embodiments, the width of the bar groove is 1/4 to 1/2, such as 1/3, of the width of the loop body.
In some embodiments, the depth of the stripe groove is 1/4 to 3/4, such as 1/2, of the thickness of the ring body.
In some embodiments, the first material is a fiber reinforced composite resin material.
In some embodiments, the first material is a fiber reinforced composite thermoplastic resin material.
In some embodiments, the first material is a long fiber reinforced composite thermoplastic resin material, the long fibers having a length of 10 to 20mm, such as 10 to 15mm.
In some embodiments, the long fibers are hybrid tows of carbon fibers and basalt fibers. The mass ratio of the carbon fibers to the basalt fibers is 1-2:1-2.
In some embodiments, the long fibers are carbon fiber and basalt hybrid tow surface treated with lanthanum chloride and KH 550.
In some embodiments, the long fibers are hybrid tows of carbon fibers and basalt that have been surface treated by soaking in a lanthanum chloride and KH550 mixed ethanol solution.
In some embodiments, the long fibers are present in the composite thermoplastic resin material in an amount of 20 to 60 percent by weight, such as 30 to 50 percent by weight, such as 40 percent by weight.
In some embodiments, the first material is prepared by using Thermoplastic Polyimide (TPI) as a thermoplastic resin matrix, and simultaneously mixing an antioxidant 1010 and a thermal stabilizer SH-826, and performing double-screw melt extrusion to soak the surface-treated carbon fiber and basalt hybrid tow by using a mixed ethanol solution of lanthanum chloride and KH 550.
In some embodiments, the thermoplastic resin comprises one or more of the following: polyimide (TPI), polyetheretherketone (PEEK), polyphenylene sulfide.
In some embodiments, the first material is selected from a polyimide (TPI) material, a Polyetheretherketone (PEEK) material, or a combination thereof.
In some embodiments, the polyimide material is any one of the polyimide materials in the art, such as a modified polyimide as disclosed in chinese patent application CN 113307972A. The polyimide can also be a rare earth modified carbon nanotube/polyimide composite material disclosed in Chinese patent CN100348667C, for example.
In some embodiments, the polyetheretherketone material is, for example, any of the polyetheretherketone materials in the art, for example, polyetheretherketone composites disclosed in chinese patent CN 109851989B.
In some embodiments, the fibers are selected from one or more of carbon fibers, basalt fibers, aramid fibers.
In some embodiments, the second material comprises polytetrafluoroethylene.
In some embodiments, the second material is powder modified polytetrafluoroethylene, the powder selected from one or more of a metal powder, a graphite powder.
In some embodiments, the working face is located on a radially outward surface of the ring body;
in some embodiments, the working surface is located on a radially inward surface of the ring body.
In a second aspect, the present disclosure provides a method for manufacturing the hydraulic cylinder guide ring of any one of the above, including the steps of:
(1) Providing long fiber-reinforced thermoplastic composite particles;
(2) Performing injection molding processing on the long fiber reinforced thermoplastic composite material particles to obtain a ring body (10), wherein the ring body (10) is provided with a working surface (11), the working surface (11) is provided with a groove (12),
(3) -filling the groove (12) with the second material.
In some embodiments, a method of making long fiber-reinforced thermoplastic composite particles comprises:
(a1) Adding a thermoplastic resin raw material into a double-screw extruder for melt extrusion, and adding continuous fibers from a channel of a die of an impregnation die to impregnate and mix a molten thermoplastic resin matrix and the continuous fibers;
(a2) And (3) carrying out extrusion forming on the product in the last step in a mould, drawing the product by a tractor, and then cutting and granulating to obtain long fiber reinforced thermoplastic composite material particles with the length of 11-15 mm and the diameter of 3 +/-0.5 mm.
In some embodiments, continuous fibers refer to carbon fibers and/or basalt fibers that are uninterrupted in length.
In some embodiments, the mass ratio of carbon fibers to basalt fibers is 1-2:1-2.
In some embodiments, the hydraulic cylinder is a hydraulic ram or a hydraulic cylinder.
Description of the terms
The term "guide ring", also called support ring, is a part used on piston or guide sleeve of hydraulic oil cylinder or air cylinder to support piston or piston rod to move, it can prevent piston or piston rod from directly contacting and rubbing with cylinder body in the course of moving, and can protect cylinder body and piston or piston rod from being damaged.
The term "melt impregnation" is a process for preparing a composite material by hot-pressing impregnation of continuous or chopped fibers and fabrics thereof with a thermoplastic resin extruded from an extruder through a die.
Unless otherwise specified,% means mass%.
The invention has the advantages of
One or more embodiments of the invention may have one or more of the following benefits:
(1) The hydraulic cylinder guide ring has an innovative structure;
(2) The hydraulic cylinder guide ring has improved compression strength;
(3) The hydraulic cylinder guide ring has improved cycle life;
(4) The hydraulic cylinder guide ring has the advantages of wear resistance, high temperature resistance and unbalance loading resistance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
FIG. 1 is a schematic view of a hydraulic cylinder guide ring according to some embodiments
FIG. 2 is a side view of a hydraulic cylinder guide ring of some embodiments
FIG. 3 is a schematic view of a hydraulic cylinder guide ring according to some embodiments
Detailed Description
Reference will now be made in detail to specific embodiments of the invention. Examples of specific embodiments are illustrated in the accompanying drawings. While the invention will be described in conjunction with these specific embodiments, it will be understood that it is not intended to limit the invention to these specific embodiments. On the contrary, these embodiments are intended to cover alternatives, modifications and equivalents, which may be included within the spirit and scope of the invention as defined by the appended claims. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be practiced without some or all of these specific details. In other instances, well known process operations have not been described in detail in order not to unnecessarily obscure the present invention.
For further illustration of the present invention, the following detailed description of a hydraulic cylinder guide ring provided by the present invention is made with reference to the accompanying drawings and embodiments, but it should not be construed as limiting the scope of the present invention.
Example 1
The hydraulic cylinder guide ring of embodiment 1 is shown in fig. 1 and 2. The hydraulic cylinder guide ring 1 comprises a ring body 10 made of a first material, wherein the ring body 10 is provided with a working surface 11, the working surface 11 is located on the radial outer side of the ring body 10, a groove 12 is formed in the working surface 11, and a second material 20 is filled in the groove 12; the first material has a greater compressive strength than the second material 20; the second material 20 has a lower coefficient of friction than the first material.
As shown in fig. 1 and 2, the hydraulic cylinder guide ring is prepared as follows:
(1) Preparation of first material particles (long fiber-reinforced modified thermoplastic particles):
thermoplastic Polyimide (TPI) is used as a thermoplastic resin matrix, and simultaneously, an antioxidant 1010 and a heat stabilizer SH-826 are mixed, the mixture is subjected to twin-screw melt extrusion, carbon fiber and basalt mixed filament bundle (respectively accounting for 50 wt%) which are subjected to surface treatment by soaking through 1% lanthanum chloride and 1% KH550 mixed ethanol solution are subjected to melt impregnation with the melt-extruded TPI according to a specified ratio through a tractor filament bundle, wherein the fiber accounts for 40% of the total weight, the mixture is heated and pressurized through a high-temperature die of an impregnation tank, and the mixture is cut and granulated after being drawn out through the tractor, so that long fiber reinforced modified thermoplastic particles are obtained. The diameter of the particles is 3 plus or minus 0.3mm, and the length is 11-15 mm;
(2) The above pellets are subjected to injection molding to form the ring body 10. The radially inward surface of the ring body 10 is a working surface 11. The working surface 11 is provided with a groove 12. The shape of the groove 12 is a strip. The slots 12 extend in the circumferential direction of the ring body 10. The circumference of the slot 12 is equal to the circumference of the ring 10. The width of the groove 12 is 1/3 of the width (W) of the working surface 11, and the width is a dimension parallel to the rotation axis of the ring body 10. The depth of the groove 12 is 1/2 of the thickness (D) of the ring body 10, and the depth is a dimension perpendicular to the direction of the rotation axis of the ring body 10.
(3) The second material 20 (polytetrafluoroethylene) was inserted into the groove of the blank to obtain the cylinder guide ring 1.
Example 2
A schematic view of the hydraulic cylinder guide ring 1 of embodiment 2 is shown in fig. 2 and 3. The hydraulic cylinder guide ring 1 comprises a ring body 10 made of a first material, the ring body 10 is provided with a working surface 11, the working surface 11 is located on the radial inner side of the ring body 10, a groove 12 is formed in the working surface 11, and a second material 20 is filled in the groove 12; the first material has a greater compressive strength than the second material 20; the second material 20 has a lower coefficient of friction than the first material.
As shown in fig. 2 and 3, the hydraulic cylinder guide ring is prepared as follows:
(1) Preparation of first material particles (long fiber-reinforced modified thermoplastic particles):
polyether ether ketone (PEEK) is used as a thermoplastic resin matrix, simultaneously mixed antioxidant 1010 and heat stabilizer SH-826 are subjected to twin-screw melt extrusion, carbon fibers and basalt mixed tows (respectively accounting for 50 wt%) subjected to surface treatment by soaking in a mixed ethanol solution of 1% lanthanum chloride and 1% KH550 are subjected to melt impregnation with the melt-extruded PEEK by a tractor according to a specified ratio, wherein the fibers account for 40% of the total weight, are heated and pressurized by a high-temperature die of an impregnation tank, are drawn by the tractor, and are cut and granulated to obtain long fiber reinforced modified thermoplastic particles. The diameter of the particles is 3 plus or minus 0.3mm, and the length is 11-15 mm;
(2) The long fiber-reinforced modified thermoplastic pellets are subjected to injection molding to form a ring body 10. The radially outward surface of the ring body 10 is a working surface 11. The working surface 11 is provided with a groove 12. The shape of the groove 12 is a strip. The slots 12 extend in the circumferential direction of the ring body 10. The circumference of the slot 12 is equal to the circumference of the ring 10. The width of the groove 12 is 1/3 of the width (W) of the working surface 11, and the width is a dimension parallel to the rotation axis of the ring body 10. The depth of the groove 12 is 1/2 of the thickness (D) of the ring body 10, and the depth is a dimension perpendicular to the direction of the rotation axis of the ring body 10.
(3) The second material 20 (polytetrafluoroethylene) was inserted into the groove of the blank to obtain the cylinder guide ring 1.
Comparative example 1
Comparative example 1 differs from example 1 in that the entirety of the hydraulic cylinder guide ring is made of a Thermoplastic Polyimide (TPI) thermoplastic polymer material.
Comparative example 2
Comparative example 2 differs from example 2 in that the entirety of the cylinder guide ring is made of a thermoplastic Polyetheretherketone (PEEK) thermoplastic polymer material.
Analytical testing
1. Parameters of the material
* The friction coefficient is tested according to the standard GB/T3960-2016.
Long fiber reinforced polyimide (TPI) thermoplastic polymers and long fiber reinforced Polyetheretherketone (PEEK) thermoplastic polymers have high compressive strength but a high coefficient of friction. Polytetrafluoroethylene has a lower coefficient of friction but a lower compressive strength.
The invention provides an innovative structure that a groove is arranged on a working surface and a second material is filled in the groove by improving the structure of the guide ring of the hydraulic cylinder. The innovative structure gives the hydraulic cylinder a guide ring with improved properties.
2. Product performance testing
The injection molded specimens and guide rings prepared in examples 1 and 2 and comparative examples 1 and 2 were tested according to the present invention, and the results are shown in Table 1:
TABLE 1
* The compressive strength is obtained according to the GB/T1041-2008 plastic compression performance determination test.
From the above experimental data, the hydraulic cylinder guide ring of the embodiments 1 and 2 has improved compression strength and service life, and has the advantages of wear resistance, high temperature resistance and unbalance loading resistance.
While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein, but rather to cover all embodiments falling within the scope of the appended claims.
Claims (15)
1. A hydraulic cylinder guide ring includes a ring body having a first material,
the ring body is provided with a working surface, a groove is formed in the working surface, and a second material is filled in the groove;
the first material has a greater compressive strength than the second material;
the second material has a lower coefficient of friction than the first material.
2. The hydraulic cylinder guide ring of claim 1,
the ratio of the compressive strength of the first material to the second material is from 2 to 1;
the ratio of the coefficient of friction of the first material to the coefficient of friction of the second material is 1.5.
3. The hydraulic cylinder guide ring of claim 1,
the first material has a compressive strength of 60Mpa or more;
the second material has a coefficient of friction of 0.12 or less.
4. The hydraulic cylinder guide ring of claim 1, wherein the groove is a strip-shaped groove extending in a circumferential direction of the ring body.
5. The cylinder guide ring of claim 4, wherein the total length of the strip-shaped groove is 75% to 100% of the total circumference of the work surface.
6. The hydraulic cylinder guide ring of claim 4, having one or more of the following features:
(1) The width of the strip-shaped groove is 1/4-1/2 of the width of the ring body;
(2) The depth of the strip-shaped groove is 1/4-3/4 of the thickness of the ring body.
7. The hydraulic cylinder guide ring of claim 1, wherein the first material is a fiber reinforced composite resin material.
8. The hydraulic cylinder guide ring of claim 1, wherein the first material is a fiber reinforced composite thermoplastic resin material.
9. The cylinder guide ring of claim 1, wherein the first material is a long fiber reinforced composite thermoplastic resin material, and the long fiber has a length of 10 to 20mm.
10. Hydraulic cylinder guide ring according to claim 7, characterized by any of the following:
the thermoplastic resin comprises one or more of: polyimide (TPI), polyetheretherketone (PEEK), polyphenylene sulfide;
the fiber is selected from one or more of carbon fiber, basalt fiber and aramid fiber.
11. The hydraulic cylinder guide ring of claim 1, wherein the second material comprises polytetrafluoroethylene.
12. The hydraulic cylinder guide ring of claim 1, wherein the second material is powder modified polytetrafluoroethylene, and the powder is selected from one or more of metal powder and graphite powder.
13. The hydraulic cylinder guide ring of claim 1, having one or more of the following features:
(1) The working face is located on a radially outward surface of the ring body;
(2) The working face is located on a radially inward surface of the ring body.
14. A method of manufacturing a guide ring for a hydraulic cylinder according to any one of claims 1 to 13, comprising the steps of:
(1) Providing long fiber-reinforced thermoplastic composite particles;
(2) Performing injection molding processing on the long fiber reinforced thermoplastic composite material particles to obtain a ring body (10), wherein the ring body (10) is provided with a working surface (11), the working surface (11) is provided with a groove (12),
(3) -filling the groove (12) with the second material.
15. The method of manufacturing of claim 14, wherein the method of manufacturing long fiber-reinforced thermoplastic composite pellets comprises:
(a1) Adding a thermoplastic resin raw material into a double-screw extruder for melt extrusion, and adding continuous fibers from a channel of a die of an impregnation die to impregnate and mix a molten thermoplastic resin matrix and the continuous fibers;
(a2) And (3) carrying out extrusion forming on the product in the last step in a mould, drawing the product by a tractor, and then cutting and granulating to obtain long fiber reinforced thermoplastic composite material particles with the length of 11-15 mm and the diameter of 3 +/-0.5 mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211438406.9A CN115949648A (en) | 2022-11-16 | 2022-11-16 | Hydraulic cylinder guide ring and preparation method thereof |
| PCT/CN2022/135079 WO2024103443A1 (en) | 2022-11-16 | 2022-11-29 | Hydraulic cylinder guide ring and preparation method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211438406.9A CN115949648A (en) | 2022-11-16 | 2022-11-16 | Hydraulic cylinder guide ring and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115949648A true CN115949648A (en) | 2023-04-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211438406.9A Pending CN115949648A (en) | 2022-11-16 | 2022-11-16 | Hydraulic cylinder guide ring and preparation method thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN115949648A (en) |
| WO (1) | WO2024103443A1 (en) |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4556223A (en) * | 1983-03-28 | 1985-12-03 | Ingersoll-Rand Company | Sealing means with spaced annular seals having support rings |
| JP2004146412A (en) * | 2002-10-22 | 2004-05-20 | Starlite Co Ltd | Guide ring and flattening apparatus |
| JP5621092B2 (en) * | 2010-05-19 | 2014-11-05 | Smc株式会社 | Fluid pressure equipment |
| US20200056030A1 (en) * | 2016-10-17 | 2020-02-20 | Burckhardt Compression Ag | Sealing element and/or guide ring made of a composition of polytetrafluoroethylene, perfluoroalkoxy polymer, and filler |
| CN108948735A (en) * | 2018-06-01 | 2018-12-07 | 北京化工大学常州先进材料研究院 | Discontinuous polyimides long fiber reinforced thermoplastic resin based composite material and preparation method thereof |
| CN108799055A (en) * | 2018-06-08 | 2018-11-13 | 安徽共青机电装备制造有限公司 | A kind of non-lubricated compressor guide ring |
| CN209244973U (en) * | 2018-12-08 | 2019-08-13 | 青岛德鲁斯密封技术有限公司 | A kind of self-lubricating guide ring |
| CN210290050U (en) * | 2019-03-22 | 2020-04-10 | 重庆气体压缩机厂有限责任公司 | Support ring and cylinder thereof |
| CN209959425U (en) * | 2019-06-12 | 2020-01-17 | 泰兴市兴华气阀有限公司 | Piston ring suitable for oil-free lubrication working condition |
| CN210949847U (en) * | 2019-09-12 | 2020-07-07 | 固安星光沃特高压水设备有限公司 | Combined sealing ring |
| US11879447B2 (en) * | 2020-09-09 | 2024-01-23 | Waukesha Bearings Corporation | Composite structures for reciprocating gas compressor systems |
-
2022
- 2022-11-16 CN CN202211438406.9A patent/CN115949648A/en active Pending
- 2022-11-29 WO PCT/CN2022/135079 patent/WO2024103443A1/en unknown
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| Publication number | Publication date |
|---|---|
| WO2024103443A1 (en) | 2024-05-23 |
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