Total synthesis grinding fluid

Abstract

The invention discloses a fully synthetic grinding fluid which is prepared from the following components in percentage by weight: 2-6% of an organic antirust agent, 8-20% of organic alcohol amine, 5-15% of trans-block polyether, 3-6% of a hyperbranched polymer surfactant, 2-4% of an amine oxide surfactant, 0-3% of an organic solvent, 2-5% of a bactericide, 0-0.5% of a defoaming agent and the balance of water. The total-synthesis grinding fluid is not sticky easily and does not contain inorganic salt components, so that the total-synthesis grinding fluid is low in residue on a grinding surface and the surface of a grinding wheel, can be attached to the surface of the grinding wheel more uniformly, does not affect the grinding process, and does not bring the damage of non-uniform attachment, deep permeation and absorption, solidification and crystallization, corrosion and abrasion to the grinding wheel in the grinding process; compared with a traditional grinding fluid, the total-synthesis grinding fluid has more excellent cleaning and wetting capacity, grinding dust generated in the grinding process can be rapidly dispersed and cleaned away, and therefore the dressing period of a grinding wheel is prolonged, vibration of the grinding wheel is reduced, the grinding efficiency is improved, and meanwhile scratches to the grinding face of an inner hole of a wind power gear are greatly reduced.

Description

Technical Field

[0001] The invention relates to a fully synthetic grinding fluid. Background Art

[0002] With the development of large-scale wind turbines, the power of wind turbine gearboxes is increasing. Gearboxes with higher power can adapt to larger wind rotors and higher power generation efficiency requirements. As the power increases, the size, weight and cost of the gearbox need to be optimized to meet the installation and operation requirements of the wind turbine. One important design optimization method is to use sliding bearings instead of rolling bearings to improve the running stability, load-bearing capacity and impact resistance of wind turbines, reduce the cost of gearboxes, reduce the risk of oil leakage, and improve the convenience and economy of wind turbine gearbox operation and maintenance.

[0003] The use of sliding bearings will increase the difficulty of grinding the inner hole of wind turbine gears, which is mainly reflected in the increase of grinding length from the original 85-330mm to 260-710mm, while the roughness Ra is still maintained within 0.30μm and without scratches. The increase in grinding length makes the running path of the grinding wheel more complicated during grinding. In addition to high-speed rotation, it is also necessary to increase up and down reciprocating motion. This requires the grinding fluid to adhere more evenly to the surface of the grinding wheel, with controllable penetration and absorbency, without solidification, crystallization, corrosion and excessive wear, and at the same time quickly clean and remove the generated grinding dust. Summary of the invention

[0004] Purpose of the invention: The purpose of the present invention is to provide a fully synthetic grinding fluid, which has good cleaning ability during the grinding process of the grinding wheel, and can quickly wet, disperse and remove the grinding dust generated by grinding, thereby avoiding the agglomeration and adhesion of the grinding dust to block the grinding wheel. On the other hand, the grinding fluid can be evenly adhered to the surface of the grinding wheel. The above two aspects work together to improve the grinding efficiency of the grinding wheel, shorten the total grinding time, and ensure that the grinding surface of the inner hole of the wind turbine gear is free of scratches.

[0005] Technical solution: The fully synthetic grinding fluid described in the present invention is formulated from the following components in weight percentage: 2-6% organic rust inhibitor, 8-20% organic alcohol amine, 5-15% trans-block polyether, 3-6% hyperbranched polymer surfactant, 2-4% amine oxide surfactant, 0-3% organic solvent, 2-5% bactericide, 0-0.5% defoamer and the remainder water.

[0006] Wherein, the organic rust inhibitor is at least two of octanoic acid, decanoic acid, undecane dibasic acid, dodecane dibasic acid or tribasic acid.

[0007] The organic alcohol amine is at least two of monoisopropanolamine, diglycolamine, 2-amino-2-methyl-1-propanol or triisopropanolamine. The organic alcohol amine of the present invention has better alkali retention capacity and antibacterial ability.

[0008] The trans-block polyether is an ethylene oxide-propylene oxide trans-block copolymer with a molecular weight of 2150 to 2650. The product model is Solvay ANTAROX 1720.

[0009] The hyperbranched polymer surfactant is a C8 alkyl alcohol, the hydrophilic group is a hydroxyl group or a carboxyl group, the mass ratio of the hydrophilic segment to the C8 alkyl segment is not less than 3:1, and the molecular weight is between 2000 and 4500.

[0010] Wherein, the amine oxide surfactant is C8-C10 branched ethoxypropylamine oxide.

[0011] Wherein, the mass ratio of the hyperbranched polymer surfactant to the amine oxide surfactant is 1:1 to 1.5:1.

[0012] Wherein, the organic solvent is at least one of triethylene glycol diethyl ether, tripropylene glycol butyl ether or dipropylene glycol propyl ether.

[0013] Wherein, the fungicide is at least one of 1,2-benzisothiazol-3-one, n-butyl-1,2-benzisothiazolin-3-one or iodopropynyl butylcarbamate.

[0014] Wherein, the defoamer is a silicone-modified polyether defoamer.

[0015] The fully synthetic grinding fluid of the present invention is prepared by the following method: a formulated amount of an organic rust inhibitor and a special organic alcohol amine are mixed, stirred for reaction for 30 minutes, then a formulated amount of water, a trans-block polyether, a hyperbranched polymer surfactant, an oxidized amine surfactant and an organic solvent are sequentially added thereto, stirred for 30 minutes, then a formulated amount of a bactericide is added thereto, stirred for 15 minutes, and finally a formulated amount of a defoamer is added thereto, stirred at room temperature for 40 to 60 minutes, to obtain a fully synthetic grinding fluid.

[0016] In the fully synthetic grinding fluid of the present invention, the hyperbranched C8 alkyl alcohol surfactant is a wetting agent with low dynamic surface tension, which can quickly reduce the surface tension of the grinding fluid, so that the grinding fluid can quickly spread on the grinding surface of the inner hole of the wind power gear; the amine oxide surfactant undergoes a protonation reaction in the aqueous solution to carry a positive charge, and neutralizes with the negatively charged grinding dust; the lone pair of electrons of the oxygen atom in the amine oxide molecular structure forms a hydrogen bond with a hydroxyl group in the hyperbranched C8 alkyl alcohol surfactant structure, thereby cooperating with the hyperbranched C8 alkyl alcohol derivative molecules to form irregular clusters; the steric hindrance effect brought by the irregular clusters can realize the rapid wetting and dispersion of the grinding dust; the rapidly wetted and dispersed grinding dust particles can be easily washed off the grinding surface under the action of mechanical force, thereby avoiding the agglomeration and adhesion of the grinding dust to block the grinding wheel, and further avoiding scratches on the grinding surface of the inner hole of the wind power gear and a decrease in the grinding efficiency of the grinding wheel.

[0017] Beneficial effects: Compared with the prior art, the present invention has the following unexpected effects: the fully synthetic grinding fluid of the present invention is not easy to become sticky (less viscous components) and does not contain inorganic salt components, so the residue on the grinding surface and the grinding wheel surface is low, so that it can adhere to the grinding wheel surface more evenly, does not affect the grinding process, and does not cause uneven adhesion, deep penetration and absorption, coagulation and crystallization, corrosion and wear hazards to the grinding wheel during the grinding process; compared with traditional grinding fluids, the fully synthetic grinding fluid of the present invention has better cleaning and wetting ability, and can quickly disperse and clean the grinding dust generated during the grinding process, thereby extending the grinding wheel dressing cycle, reducing grinding wheel vibration, and improving grinding efficiency, while greatly reducing scratches on the grinding surface of the inner hole of the wind turbine gear (no scratches on the grinding surface). DETAILED DESCRIPTION

[0018] Example 1

[0019] The fully synthetic grinding fluid of the present invention is prepared from the following components in weight percentage: 2% of octanoic acid, 4% of undecane dibasic acid, 5% of monoisopropanolamine, 3% of diglycolamine, 5% of trans-block polyether with a molecular weight of 2150 (the product model is Solvay ANTAROX 1720), 5% of C8 alkyl alcohol hyperbranched surfactant (the product model is Evonik of Germany) Surten W111) 3%, C8 branched ethoxypropylamine oxide (product model is American Painuo Chemical AO-8) 2%, triethylene glycol diethyl ether 3%, 1,2-benzisothiazol-3-one 3%, iodopropynyl butylcarbamate 0.2% and the balance water.

[0020] Example 2

[0021] The fully synthetic grinding fluid of the present invention is prepared from the following components in weight percentage: 3% of decanoic acid, 3% of dodecane dibasic acid, 8% of monoisopropanolamine, 6% of 2-amino-2-methyl-1-propanol, 6% of triisopropanolamine, 8% of trans-block polyether with a molecular weight of 2650 (the product model is Solvay ANTAROX 1720), 4% of C8 alkyl alcohol hyperbranched surfactant, 4% of C10 branched ethoxypropylamine oxide (the product model is American Painuo Chemical AO-10) 4%, triethylene glycol diethyl ether 1%, tripropylene glycol butyl ether 2%, 1,2-benzisothiazol-3-one 2%, n-butyl-1,2-benzisothiazolin-3-one 1%, iodopropynyl butyl carbamate 1%, silicone modified polyether defoamer 0.5% and water as the balance.

[0022] Example 3

[0023] The fully synthetic grinding fluid is prepared from the following components in percentage by weight: 4% of dodecanedioic acid, 2% of tribasic acid, 6% of diglycolamine, 6% of 2-amino-2-methyl-1-propanol, 15% of trans-block polyether with a molecular weight of 2650, 5% of C8 alkyl alcohol hyperbranched surfactant, 4% of C10 branched ethoxypropylamine oxide, 3% of tripropylene glycol butyl ether, 2% of 1,2-benzisothiazol-3-one, 2% of n-butyl-1,2-benzisothiazolin-3-one, 0.2% of organosilicon-modified polyether defoamer and the balance of water.

[0024] Comparative Example 1

[0025] A grinding fluid is prepared from the following components in percentage by weight: 3% of capric acid, 3% of undecane dibasic acid, 2% of tribasic acid, 5% of monoisopropanolamine, 4% of sodium hydroxide, 1% of EDTA, 6% of 2-amino-2-methyl-1-propanol, 10% of trans-block polyether with a molecular weight of 2650, 3% of tripropylene glycol butyl ether, 2% of 1,2-benzisothiazol-3-one, 2% of n-butyl-1,2-benzisothiazolin-3-one, 0.5% of silicone oil defoamer and the balance of water.

[0026] Comparative Example 2

[0027] A grinding fluid is prepared from the following components in percentage by weight: 3% of capric acid, 3% of undecane dibasic acid, 2% of tribasic acid, 5% of monoisopropanolamine, 6% of 2-amino-2-methyl-1-propanol, 4% of C8 alkyl alcohol hyperbranched surfactant, 10% of trans-block polyether with a molecular weight of 2650, 3% of tripropylene glycol butyl ether, 2% of 1,2-benzisothiazol-3-one, 2% of n-butyl-1,2-benzisothiazolin-3-one, 0.5% of organosilicon-modified polyether defoamer and the balance of water.

[0028] Comparative Example 3

[0029] A grinding fluid is prepared from the following components in percentage by weight: 3% of capric acid, 3% of undecane dibasic acid, 2% of tribasic acid, 5% of monoisopropanolamine, 6% of 2-amino-2-methyl-1-propanol, 10% of trans-block polyether with a molecular weight of 2650, 3% of tripropylene glycol butyl ether, 4% of C10 branched ethoxypropylamine oxide, 2% of 1,2-benzisothiazol-3-one, 2% of n-butyl-1,2-benzisothiazolin-3-one, 0.5% of organosilicon-modified polyether defoamer and the balance of water.

[0030] Comparative Example 4

[0031] Octanoic acid 2%, undecane dibasic acid 4%, monoisopropanolamine 5%, diglycolamine 3%, trans-block polyether with molecular weight 2150 5%, Surten W 111 2%、 AO-8 3%, triethylene glycol diethyl ether 3%, 1,2-benzisothiazol-3-one 3%, iodopropynyl butylcarbamate 0.2% and the balance water.

[0032] According to the conventional testing method of fully synthetic grinding fluid, the performance of the grinding fluids of Examples 1 to 3 and Comparative Examples 1 to 4 was tested. The test results are shown in Table 1.

[0033] Table 1 shows the performance test results of the grinding fluids of Examples 1 to 3 and Comparative Examples 1 to 4

[0034]

[0035]

[0036] It can be seen from the data in Table 1 that the grinding fluids of Examples 1 to 3 of the present invention have better foaming performance and wetting performance than those of Comparative Examples 1 to 4 (the foaming performance test index shows that the foaming performance is better; the smaller the surface tension, the better the wetting performance).

[0037] Table 2: Grinding wheel compatibility evaluation

[0038] Characterization Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Surface attachment Very rare Very rare Very rare serious slight medium medium Penetration and absorption slight slight slight medium slight slight slight Solidification and crystallization none none none medium none none none corrosion none none none slight none none none

[0039] Note: Use grinding wheels that have been accepted by customers (determine the model and specifications). After the grinding wheel is dressed, evaluate it after one grinding cycle (ensure that the same manufacturer and the same model of grinding wheels that have been accepted by customers are used, wind power parts with the same level of heat treatment carburization deformation, consistent feed amounts and feed speeds for rough grinding, semi-finishing grinding, and finishing grinding, the same dressing roller, and only one variable, the grinding fluid, are kept. Different grinding fluids correspond to different cycle times. One cycle time refers to grinding the grinding wheel until it can no longer be ground).

[0040] It can be seen from the data in Table 2 that the grinding fluids of Examples 1 to 3 of the present invention have better compatibility with the grinding wheel than those of Comparative Examples 1 to 4.

[0041] Table 3: Actual grinding results

[0042]

[0043] Note: The actual grinding is guaranteed to use the same manufacturer and model of customer-approved grinding wheels, wind power parts with the same level of heat treatment carburization deformation, consistent rough grinding, semi-finishing grinding, and fine grinding feed amounts and feed speeds, the same dressing rollers, and only the grinding fluid is kept as a variable.

[0044] It can be seen from the data in Table 3 that the grinding fluids of Examples 1 to 3 of the present invention have shorter total grinding time (shorter grinding time means higher grinding effect), longer grinding wheel life and dressing interval, lower machine tool load, better roughness, and can achieve no surface scratches in the grinding area compared with Comparative Examples 1 to 4.

Claims

1. A fully synthetic grinding fluid, characterized in that: The invention is prepared from the following components in weight percentage: 2-6% of organic rust inhibitor, 8-20% of organic alcohol amine, 5-15% of trans-block polyether, 3-6% of hyperbranched polymer surfactant, 2-4% of amine oxide surfactant, 0-3% of organic solvent, 2-5% of bactericide, 0-0.5% of defoamer and the balance of water.

2. The fully synthetic grinding fluid according to claim 1, characterized in that: The organic rust inhibitor is at least two of octanoic acid, decanoic acid, undecane dibasic acid, dodecane dibasic acid or tribasic acid.

3. The fully synthetic grinding fluid according to claim 1, characterized in that: The organic alcohol amines are at least two of monoisopropanolamine, diglycolamine, 2-amino-2-methyl-1-propanol or triisopropanolamine.

4. The fully synthetic grinding fluid according to claim 1, characterized in that: The trans-block polyether is an ethylene oxide-propylene oxide trans-block copolymer with a molecular weight of 2150-2650.

5. The fully synthetic grinding fluid according to claim 1, characterized in that: The hyperbranched polymer surfactant is a C8 alkyl alcohol; wherein the hydrophilic group is a hydroxyl group or a carboxyl group, and the mass ratio of the hydrophilic segment to the C8 alkyl segment is not less than 3:1; and the molecular weight of the hyperbranched polymer surfactant is between 2000 and 4500.

6. The fully synthetic grinding fluid according to claim 1, characterized in that: The amine oxide surfactant is a C8-C10 branched ethoxypropylamine oxide.

7. The fully synthetic grinding fluid according to claim 1, characterized in that: The mass ratio of the hyperbranched polymer surfactant to the amine oxide surfactant is 1:1 to 1.5:

1.

8. The fully synthetic grinding fluid according to claim 1, characterized in that: The organic solvent is at least one of triethylene glycol diethyl ether, tripropylene glycol butyl ether or dipropylene glycol propyl ether.

9. The fully synthetic grinding fluid according to claim 1, characterized in that: The bactericide is at least one of 1,2-benzisothiazol-3-one, n-butyl-1,2-benzisothiazolin-3-one or iodopropynyl butyl carbamate.

10. The fully synthetic grinding fluid according to claim 1, characterized in that: The defoamer is a silicone-modified polyether defoamer.

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