A gate hoist wire rope grease

Abstract

The present invention provides a gate hoist wire rope grease, which comprises 50-70% of high-viscosity base oil, 5-10% of polyethylene, 8-15% of microcrystalline wax, 5-8% of adhesive, 1-3% of rust inhibitor and 8-15% of petroleum asphalt in terms of mass percentage. The present invention adds petroleum asphalt with a needle penetration greater than 100 1 / 10mm, a softening point of 30-40℃ and an elongation of 60-80cm, and reasonably allocates other components and mass percentages, so that the wire rope grease forms a firm solidified oil film on the surface of the wire rope, realizes effective wrapping of the wire rope, avoids the occurrence of bubbles and shedding, and further avoids corrosion caused by moisture entering the inside of the wire rope, thereby meeting the use requirements of the wire rope of the gate hoist of the water conservancy project.

Description

Technical Field

[0001] The invention relates to a gate hoist wire rope grease, and relates to the technical field of wire rope grease. Background Art

[0002] In order to control and allocate natural surface water and groundwater, more rationally develop and utilize water resources, and effectively regulate and distribute water, the construction of water conservancy projects has become a means of resource utilization in the long term. As an indispensable equipment in water conservancy projects, the safety of the gate hoist is related to the normal operation of hydraulic structures, the utilization rate of water resources and the safety of the surrounding environment of the project. As a key component connecting the hoist and the gate, the wire rope is crucial to give full play to the benefits of the project.

[0003] Wire rope grease is a kind of lubricating grease and a supporting material for wire ropes. It is used for lubrication and protection of the surface of wire ropes. However, the current wire rope grease rarely considers its change degree in water during the research and development process, resulting in bubbles and shedding of wire rope grease during use. Water enters the wire rope through the bubbles and shedding positions, causing large-scale rust on the wire rope and causing it to fail, affecting the safe use of the wire rope. Therefore, how to solve the bubbles and shedding phenomenon of wire rope grease when it comes into contact with water has received more and more attention. Summary of the invention

[0004] The invention provides a gate hoist wire rope grease, which is used to solve the problem of bubbles and shedding caused by the wire rope grease meeting water.

[0005] The present invention also provides a preparation method of the steel wire rope grease and a gate hoist steel wire rope coated with the steel wire rope grease.

[0006] The first aspect of the present invention provides a gate hoist wire rope grease, which comprises 50-70% of high-viscosity base oil, 5-10% of polyethylene, 8-15% of microcrystalline wax, 5-8% of adhesive, 1-3% of rust inhibitor and 8-15% of petroleum asphalt in terms of mass percentage;

[0007] The petroleum asphalt has a needle penetration greater than or equal to 100 1 / 10 mm, a softening point of 30-40° C., and an elongation of 60-80 cm.

[0008] In a specific embodiment, the kinematic viscosity of the high viscosity base oil at 100°C is 60-80 mm 2 / s.

[0009] In one specific embodiment, the molecular weight of the polyethylene is 6000-10000.

[0010] In a specific embodiment, the microcrystalline wax has a drop melting point of 55-90°C.

[0011] In a specific embodiment, the adhesive is an ethylene-propylene copolymer type viscosity index improver.

[0012] In a specific embodiment, the kinematic viscosity of the adhesive at 100°C is 600-900 mm 2 / s.

[0013] In a specific embodiment, the rust inhibitor includes one or both of a monohydric alcohol ester rust inhibitor and a polyhydric alcohol ester rust inhibitor.

[0014] In a specific embodiment, the monohydric alcohol ester rust inhibitor includes one or both of pentaerythritol monooleate and sorbitan monooleate.

[0015] The second aspect of the present invention provides a method for preparing any of the above-mentioned wire rope greases, wherein 50-70% of high-viscosity base oil, 5-10% of polyethylene, 8-15% of microcrystalline wax, 5-8% of adhesive, 1-3% of rust inhibitor and 8-15% of petroleum asphalt are mixed according to the mass percentage to obtain the wire rope grease.

[0016] A third aspect of the present invention provides a gate hoist wire rope, the surface of which is coated with any of the above-mentioned wire rope greases.

[0017] The present invention adds petroleum asphalt with a needle penetration greater than 100 1 / 10mm, a softening point of 30-40°C, and an elongation of 60-80cm, and reasonably mixes other components and their mass percentages, so that the wire rope grease forms a firm solidified oil film on the surface of the steel wire rope, thereby effectively wrapping the steel wire rope, avoiding the occurrence of bubbles and falling off, and further avoiding corrosion caused by moisture entering the inside of the steel wire rope, thereby meeting the use requirements of the steel wire rope of the gate hoist of a water conservancy project. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] The first aspect of the present invention provides a gate hoist wire rope grease, which comprises 50-70% of high-viscosity base oil, 5-10% of polyethylene, 8-15% of microcrystalline wax, 5-8% of adhesive, 1-3% of rust inhibitor and 8-15% of petroleum asphalt in terms of mass percentage;

[0020] The petroleum asphalt has a needle penetration greater than or equal to 100 1 / 10 mm, a softening point of 30-40° C., and an elongation of 60-80 cm.

[0021] The invention provides a gate hoist wire rope grease, comprising high-viscosity base oil, polyethylene, microcrystalline wax, adhesive, rust inhibitor and petroleum asphalt, wherein the total mass of the wire rope grease is 100%, the mass percentage of the high-viscosity base oil is 30-70%, the mass percentage of the polyethylene is 5-10%, the mass percentage of the microcrystalline wax is 8-15%, the mass percentage of the adhesive is 5-8%, the mass percentage of the rust inhibitor is 1-3%, and the mass percentage of the petroleum asphalt is 8-15%, wherein the needle penetration of the petroleum asphalt is greater than or equal to 100 1 / 10mm, the softening point is 30-40°C, and the elongation is 60-80cm.

[0022] The present invention adds petroleum asphalt with a needle penetration greater than 100 1 / 10mm, a softening point of 30-40°C, and an elongation of 60-80cm, and reasonably mixes other components and their mass percentages, so that the wire rope grease forms a firm solidified oil film on the surface of the steel wire rope, thereby effectively wrapping the steel wire rope, avoiding the occurrence of bubbles and falling off, and further avoiding corrosion caused by moisture entering the inside of the steel wire rope, thereby meeting the use requirements of the steel wire rope of the gate hoist of a water conservancy project.

[0023] The following is a detailed description of each component:

[0024] As the basic component of wire rope grease, high viscosity base oil helps to ensure the thickness of the solidified oil film formed by the wire rope grease, giving the wire rope grease good load-bearing capacity to meet the use requirements under high loads; at the same time, controlling the mass percentage of high viscosity base oil to 50-70% helps to meet the use requirements of wire rope grease in terms of low temperature and penetration.

[0025] Furthermore, the kinematic viscosity of the high viscosity base oil at 100°C is 60-80 mm 2 / s, kinematic viscosity as a performance parameter of base oil can be obtained by conventional technical means in the field, and the kinematic viscosity at 100°C is 60-80mm 2 / s high viscosity base oil helps to increase the oil film thickness at the specified greasing temperature during the wire rope production process.

[0026] Microcrystalline wax is a white amorphous non-crystalline solid wax, mainly composed of branched saturated hydrocarbons of C31-C70, containing a small amount of cyclic and straight-chain hydrocarbons. The melting point, molecular weight and viscosity of microcrystalline wax after melting are higher than those of petroleum wax. When combined with polyethylene, it can meet the high-temperature performance and oil film solidification requirements of wire rope grease. At the same time, controlling the mass percentage of microcrystalline wax at 5-10% helps to speed up the formation of solid oil film at the specified grease coating temperature during the production of wire ropes, and avoid problems such as dripping of wire rope grease due to slow condensation or peeling due to fast condensation.

[0027] Furthermore, the drop melting point of the microcrystalline wax is 55-90°C, and the drop melting point refers to the temperature at which the microcrystalline wax changes from a solid or semi-solid state to a liquid state. The testing method is a conventional technical means in the field. Selecting a microcrystalline wax with a drop melting point of 55-90°C helps to avoid the adverse effects of the addition of microcrystalline wax on the low temperature performance and permeability of the wire rope grease.

[0028] Polyethylene is a polymer obtained by polymerizing ethylene as a monomer, and the molecular weight of the polyethylene is 6000-10000.

[0029] The adhesive is used to ensure the adhesion of the wire rope grease to the surface of the wire rope. Controlling the mass percentage of the adhesive at 5-8% helps to meet the requirements of the viscosity of the wire rope grease, the thickness of the oil film formed and the load-bearing capacity of the oil film.

[0030] Furthermore, the adhesive is an ethylene-propylene copolymer viscosity index improver, and its kinematic viscosity at 100°C is 600-900 mm 2 / s.

[0031] The rust inhibitor is used to improve the rust resistance of the steel wire rope, and the mass percentage is controlled at 1-3%.

[0032] Since ester rust inhibitors have the advantages of excellent low temperature performance, aging resistance and pollution resistance, the rust inhibitors include monohydric alcohol esters and polyhydric alcohol ester rust inhibitors. Furthermore, the monohydric alcohol ester rust inhibitors include one or two of pentaerythritol monooleate and sorbitan monooleate.

[0033] Petroleum asphalt is a product of crude oil processing, and its needle penetration is greater than or equal to 100 (1 / 10mm), softening point is 30-40℃, and ductility is 60-80cm, wherein the needle penetration refers to the depth of a standard cone that sinks into a grease sample kept at 25℃ within 5 seconds, and the unit is 1 / 10mm. The greater the needle penetration, the softer the petroleum asphalt, that is, the smaller the viscosity, and vice versa, the harder the petroleum asphalt, that is, the greater the viscosity; the softening point mainly refers to the condition temperature when the petroleum asphalt reaches a certain viscosity under specific experimental conditions, and is an important indicator of the temperature sensitivity of the reaction asphalt; ductility asphalt refers to the ductility of the asphalt, and the greater the ductility, the better the plasticity of the asphalt. The test methods for needle penetration, softening point and ductility are all standard methods, and the present invention will not repeat them here. Selecting the petroleum asphalt with the above parameters is helpful to form a firm solidified oil film, effectively wrap the steel wire rope, and prevent water from entering the inside of the steel wire rope when scouring the steel wire rope, corroding the steel wire rope from the inside, and accelerating the corrosion of the steel wire rope.

[0034] In summary, the present invention adds petroleum asphalt with a needle penetration greater than 100 1 / 10mm, a softening point of 30-40°C, and an elongation of 60-80cm, and reasonably mixes other components and their mass percentages, so that the wire rope grease forms a firm solidified oil film on the surface of the wire rope, thereby effectively wrapping the wire rope, avoiding the occurrence of bubbles and falling off, and further avoiding corrosion caused by moisture entering the inside of the wire rope, thereby meeting the use requirements of the wire rope of the gate opening and closing machine of the water conservancy project.

[0035] The second aspect of the present invention provides a method for preparing any of the above-mentioned wire rope greases, comprising the following steps: mixing 50-70% of high-viscosity base oil, 5-10% of polyethylene, 8-15% of microcrystalline wax, 5-8% of adhesive, 1-3% of rust inhibitor and 8-15% of petroleum asphalt according to mass percentage to obtain the wire rope grease.

[0036] The preparation of the wire rope grease can be carried out according to conventional technical means, by weighing the raw material components with the above-mentioned mass percentages and mixing them uniformly at 120-150°C.

[0037] A third aspect of the present invention provides a gate hoist wire rope, the surface of which is coated with any of the above-mentioned wire rope greases.

[0038] The steel wire rope provided by the present invention has the above-mentioned steel wire rope grease coated on its surface. Specifically, during the steel wire rope production process, the above-mentioned steel wire rope grease is coated on the surface of the steel wire rope at a specified grease coating temperature. The steel wire rope grease can form a solidified oil film that wraps the steel wire rope, thereby preventing moisture from entering the interior of the steel wire rope and preventing corrosion of the steel wire rope, thereby meeting the use requirements of the steel wire rope of the gate opening and closing machine of the water conservancy project.

[0039] The following is a detailed description with reference to specific embodiments:

[0040] Example 1

[0041] The wire rope grease provided in this embodiment includes 50 kg of high-viscosity base oil, 5 kg of polyethylene, 8 kg of microcrystalline wax, 5 kg of ethylene-propylene copolymer viscosity index improver, 1 kg of rust inhibitor pentaerythritol monooleate and 8 kg of petroleum asphalt, wherein:

[0042] High viscosity base oil 100℃ kinematic viscosity is 60.23mm 2 / s;

[0043] The molecular weight of polyethylene is 8000;

[0044] The drop melting point of microcrystalline wax is 90°C;

[0045] The kinematic viscosity of ethylene-propylene copolymer viscosity index improver at 100℃ is 650.23mm 2 / s;

[0046] The saponification value of the rust inhibitor pentaerythritol monooleate is 187 mgKOH / g;

[0047] The needle penetration of petroleum asphalt is greater than 120 1 / 10mm, the softening point is 32℃, and the elongation is 65cm.

[0048] The preparation method of the steel wire rope grease provided in this embodiment comprises the following steps:

[0049] The above components in parts by mass are mixed and stirred at 120° C. to 150° C. to obtain the steel wire rope grease.

[0050] Example 2

[0051] The wire rope grease provided in this embodiment includes 60 kg of high-viscosity base oil, 7 kg of polyethylene, 10 kg of microcrystalline wax, 7 kg of ethylene-propylene copolymer viscosity index improver, 2 kg of rust inhibitor pentaerythritol monooleate and 10 kg of petroleum asphalt, wherein:

[0052] High viscosity base oil 100℃ kinematic viscosity is 75.23mm 2 / s;

[0053] The molecular weight of polyethylene is 7200;

[0054] The drop melting point of microcrystalline wax is 70°C;

[0055] The kinematic viscosity of ethylene-propylene copolymer viscosity index improver at 100℃ is 850.21mm 2 / s;

[0056] The saponification value of the rust inhibitor pentaerythritol monooleate is 189 mgKOH / g;

[0057] The needle penetration of petroleum asphalt is greater than 110 1 / 10mm, the softening point is 40℃ and the elongation is 72cm.

[0058] The preparation method of the steel wire rope grease provided in this embodiment comprises the following steps:

[0059] The above components in parts by mass are mixed and stirred at 120° C. to 150° C. to obtain the steel wire rope grease.

[0060] Example 3

[0061] The wire rope grease provided in this embodiment includes 70 kg of high-viscosity base oil, 10 kg of polyethylene, 15 kg of microcrystalline wax, 8 kg of ethylene-propylene copolymer viscosity index improver, 3 kg of rust inhibitor pentaerythritol monooleate and 15 kg of petroleum asphalt, wherein:

[0062] High viscosity base oil 100℃ kinematic viscosity is 78.31mm 2 / s;

[0063] The molecular weight of polyethylene is 6800;

[0064] The drop melting point of microcrystalline wax is 80°C;

[0065] The kinematic viscosity of ethylene-propylene copolymer viscosity index improver at 100℃ is 750.02mm 2 / s;

[0066] The saponification value of the rust inhibitor pentaerythritol monooleate is 187 mgKOH / g;

[0067] The needle penetration of petroleum asphalt is greater than 140 1 / 10mm, the softening point is 40℃ and the elongation is 75cm.

[0068] The preparation method of the steel wire rope grease provided in this embodiment comprises the following steps:

[0069] The above components in parts by mass are mixed and stirred at 120° C. to 150° C. to obtain the steel wire rope grease.

[0070] Comparative Example 1

[0071] The wire rope grease provided in this comparative example can refer to Example 1, except that petroleum asphalt is not included.

[0072] Tables 1-4 list and illustrate the components of the steel wire rope grease provided in Examples 1-3 and Comparative Example 1 to make the differences in the components of the steel wire rope grease provided in Examples 1-3 and Comparative Example 1 more intuitive.

[0073] Table 1 Components and contents of the steel wire rope grease provided in Example 1

[0074]

[0075] Table 2 Components and contents of the steel wire rope grease provided in Example 2

[0076]

[0077] Table 3 Components and contents of the steel wire rope grease provided in Example 3

[0078]

[0079]

[0080] Table 4 Components and contents of the steel wire rope grease provided in Comparative Example 1

[0081] Raw material name Raw material data Content(kg) Mass percentage (%) Base oil <![CDATA[The kinematic viscosity at 100℃ is 60.23 mm 2 / s]]> 50 72.46 Polyethylene Molecular weight: 8000 5 7.25 Microcrystalline wax Melting point is 90℃ 8 11.59 Viscosity Index Improver <![CDATA[The kinematic viscosity at 100℃ is 650.23 mm 2 / s]]> 5 7.25 Pentaerythritol monooleate Saponification value: 187mgKOH / g 1 1.45

[0082] The present invention tests the performance of the steel wire rope grease provided in Examples 1-3 and Comparative Example 1, and the test results of the test method used are shown in Table 5:

[0083] Table 5 Performance test methods and results of the steel wire rope grease provided in Examples 1-3 and Comparative Example 1

[0084] Detection Methods Example 1 Example 2 Example 3 Comparative Example 1 Dropping point(℃) GB / T4929 80 81 80 78 1 / 4 cone penetration (1 / 10mm) GB / T 269 15 17 16 20 Corrosion (45# steel, 100℃ / 3h) SH / T0331 qualified qualified qualified qualified Low temperature performance (-35℃ / 30min) Appendix B of SH / T 0387 qualified qualified qualified qualified Moisture (%) GB / T 512 trace trace trace trace Slip test (60℃ / 1h) Appendix A to SH / T 0387 Six sides non-slip Six sides non-slip Six sides non-slip Six sides non-slip Waterproof spray (%) SH / T 0643 0.1 0.25 0.1 60.21 Wet heat test (steel sheet, 30d), level GB / T 2361 A A A A Salt spray test (steel sheet, 30d), level SH / T 0081 A A A A

[0085] According to the data provided in Table 1, compared with Comparative Example 1, the waterproof spray of the wire rope grease provided in Examples 1-3 is all below 0.25%, indicating that the addition of petroleum asphalt that meets the above performance parameters can effectively improve the waterproof performance of the wire rope grease and avoid the premature loss of the wire rope grease due to the scouring of a large amount of water. At the same time, it will not affect other properties of the wire rope grease and meet the use requirements of the wire rope of the gate hoist of the water conservancy project.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A gate hoist wire rope grease, characterized in that: The composition comprises 50-70% high viscosity base oil, 5-10% polyethylene, 8-15% microcrystalline wax, 5-8% adhesive, 1-3% ester rust inhibitor and 8-15% petroleum asphalt according to mass percentage; the drop melting point of the microcrystalline wax is 55-90°C; The petroleum asphalt has a needle penetration greater than or equal to 100 1 / 10 mm, a softening point of 30-40° C., and an elongation of 60-80 cm.

2. The steel wire rope grease according to claim 1, characterized in that: The kinematic viscosity of the high viscosity base oil at 100°C is 60-80 mm 2 / s.

3. The steel wire rope grease according to claim 1, characterized in that: The molecular weight of the polyethylene is 6000-10000.

4. The steel wire rope grease according to claim 1, characterized in that: The adhesive is an ethylene-propylene copolymer type viscosity index improver.

5. The steel wire rope grease according to claim 4, characterized in that: The kinematic viscosity of the adhesive at 100°C is 600-900 mm 2 / s.

6. The steel wire rope grease according to claim 1, characterized in that: The ester rust inhibitor includes one or both of monohydric alcohol ester rust inhibitor and polyhydric alcohol ester rust inhibitor.

7. The steel wire rope grease according to claim 6, characterized in that: The monohydric alcohol ester rust inhibitor includes one or both of pentaerythritol monooleate and sorbitan monooleate.

8. The method for preparing the steel wire rope grease according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: mixing 50-70% of high viscosity base oil, 5-10% of polyethylene, 8-15% of microcrystalline wax, 5-8% of adhesive, 1-3% of ester rust inhibitor and 8-15% of petroleum asphalt according to mass percentage to obtain the wire rope grease.

9. A gate hoist wire rope, characterized in that: The surface of the steel wire rope grease is coated with the steel wire rope grease according to any one of claims 1 to 7.

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