Rotary vane vacuum pump oil and rotary vane vacuum pump

Abstract

The present invention provides a rotary vane vacuum pump oil and a rotary vane vacuum pump. The rotary vane vacuum pump oil of the present invention comprises, by mass percentage, 0.1-5% of ionic liquid; 0.1-5% of antioxidant; 0.01-1% of rust inhibitor; 0.001-0.5% of demulsifier; 0.001-0.5% of antifoaming agent; the balance is base oil; wherein the ionic liquid comprises a structure of formula 1. The rotary vane vacuum pump oil of the present invention has relatively excellent anti-oxidation, anti-rust, anti-corrosion, anti-wear, anti-emulsification, anti-foaming and environmental friendliness.

Description

Technical Field

[0001] The invention relates to the technical field of lubricating oil, and in particular to a rotary vane vacuum pump oil and a rotary vane vacuum pump. Background Art

[0002] The rotary vane vacuum pump is the most common and widely used variable displacement pump in the market. The rotary vane vacuum pump plays an important role in many fields such as food packaging, freeze drying, lighting, etc. The performance of the rotary vane vacuum pump oil directly affects the use of the rotary vane vacuum pump. In order to broaden the scope of use of the rotary vane vacuum pump and extend the service life of the rotary vane vacuum pump, there are certain requirements for the anti-oxidation, anti-wear, anti-rust, anti-corrosion, anti-emulsification, anti-foaming and other properties of the rotary vane vacuum pump oil.

[0003] Although the current vacuum pump oil can improve the various properties of the rotary vane vacuum pump oil to a certain extent (for example, oxidation resistance, wear resistance, rust resistance, corrosion resistance, demulsification resistance and anti-foaming properties), the degree of improvement of the various properties of the rotary vane vacuum pump oil is still limited, so that there is room for further improvement in the various properties of the rotary vane vacuum pump oil, especially the oxidation resistance and wear resistance of the rotary vane vacuum pump oil. In addition, the environmental friendliness of the rotary vane vacuum pump oil in the prior art is poor. Therefore, it is urgent to provide a rotary vane vacuum pump oil with more excellent oxidation resistance, wear resistance, rust resistance, corrosion resistance, demulsification resistance and anti-foaming properties as well as environmental friendliness. Summary of the invention

[0004] The invention provides a rotary vane vacuum pump oil, which has relatively excellent anti-oxidation, anti-rust, anti-corrosion, anti-wear, anti-emulsification, anti-foaming and environmental friendliness.

[0005] The present invention provides a rotary vane vacuum pump. Since the rotary vane vacuum pump includes the above-mentioned rotary vane vacuum pump oil, the anti-corrosion and anti-oxidation properties of the gears, bearings and other parts of the rotary vane vacuum pump are good. The rotary vane vacuum pump has a long service life and a wide range of applications.

[0006] The present invention provides a rotary vane vacuum pump oil, which comprises, by mass percentage:

[0007]

[0008] The balance is base oil;

[0009] Wherein, the ionic liquid comprises the following structure:

[0010]

[0011] Wherein, n is a positive integer selected from 6-14.

[0012] The rotary vane vacuum pump oil as described above, wherein the content by mass percentage includes:

[0013]

[0014] The balance is base oil.

[0015] The rotary vane vacuum pump oil as described above, wherein the mass ratio of the antioxidant to the ionic liquid is 1:(0.5-1).

[0016] The rotary vane vacuum pump oil as described above, wherein the structural formula of the ionic liquid is:

[0017]

[0018] The rotary vane vacuum pump oil as described above, wherein the antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0019] The rotary vane vacuum pump oil as described above, wherein the rust inhibitor is selected from at least one of isononylphenoxyacetic acid and dodecenylsuccinic acid.

[0020] The rotary vane vacuum pump oil as described above, wherein the demulsifier is selected from at least one of oil-soluble polyethers and condensates of amines and ethylene oxide.

[0021] The rotary vane vacuum pump oil as described above, wherein the anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil, and polyacrylate.

[0022] The rotary vane vacuum pump oil as described above, wherein the base oil is selected from at least one of Group I base oil, Group II base oil and Group III base oil.

[0023] The present invention also provides a rotary vane vacuum pump, which includes the rotary vane vacuum pump oil as described above.

[0024] The present invention provides a rotary vane vacuum pump oil, which includes a specific content of ionic liquid, an antioxidant, a rust inhibitor, a demulsifier, an antifoaming agent and a base oil, wherein the ionic liquid includes a structure shown in Formula 1. Since the ionic liquid constituting the rotary vane vacuum pump oil includes the structure shown in Formula 1, the rotary vane vacuum pump oil has relatively excellent comprehensive performance. It is worth mentioning that the rotary vane vacuum pump oil prepared using the ionic liquid also has relatively excellent environmental friendliness and has a relatively broad application prospect.

[0025] The rotary vane vacuum pump of the present invention includes the above-mentioned rotary vane vacuum pump oil, so the gears, bearings and other parts thereof have good corrosion resistance, oxidation resistance and other properties, and the rotary vane vacuum pump has a long service life and a wide range of applications. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. 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.

[0027] The first aspect of the present invention provides a rotary vane vacuum pump oil, comprising, by mass percentage:

[0028]

[0029]

[0030] The balance is base oil;

[0031] Among them, ionic liquids include the following structures:

[0032]

[0033] Wherein, n is a positive integer selected from 6-14.

[0034] The present invention does not limit the specific source of the ionic liquid. The ionic liquid can be prepared by a preparation method commonly used in the art, or it can be purchased commercially.

[0035] The antioxidant, rust inhibitor, demulsifier, antifoaming agent and base oil of the present invention are not particularly limited and can be selected from the antioxidants, rust inhibitors, demulsifiers, antifoaming agents and base oils commonly used in the art.

[0036] In the present invention, the rotary vane vacuum pump oil includes the structure of formula 1. On the one hand, the main component of the rotary vane vacuum pump oil is the ionic liquid shown in formula 1, which not only has good solubility, but also can show excellent compatibility when matched with other components. On the other hand, the rotary vane vacuum pump oil has relatively excellent anti-oxidation (high rotary oxygen bomb), anti-rust (qualified liquid phase corrosion), anti-corrosion (100°C, 3h copper sheet corrosion level is greater than or equal to 1b), anti-wear (gear machine load capacity failure level is greater than or equal to 8), anti-emulsification (oil-water separation time is less than or equal to 10min) and anti-foaming performance (foam tendency / foam stability is less than or equal to 10 / 0mL / mL), especially has relatively excellent anti-oxidation and anti-wear properties. The rotary vane vacuum pump oil of the present invention is used for the stator and rotor, shaft seal, gear and bearing in the rotary vane vacuum pump cavity, and can play an excellent lubricating role, prolong the service life of the rotary vane vacuum pump, and broaden the scope of use of the rotary vane vacuum pump.

[0037] It is worth mentioning that the rotary vane vacuum pump oil prepared using this ionic liquid is also environmentally friendly and convenient for industrial applications.

[0038] Furthermore, when the rotary vane vacuum pump oil includes, by mass percentage:

[0039]

[0040]

[0041] When the balance is base oil, the rotary vane vacuum pump oil has more excellent comprehensive properties (anti-oxidation, anti-rust, anti-corrosion, anti-wear, anti-emulsification and anti-foaming).

[0042] In some embodiments of the present invention, in order to further improve the comprehensive performance of the rotary vane vacuum pump oil, the mass ratio of the antioxidant to the ionic liquid is 1:(0.5-1).

[0043] In the present invention, the raw materials of antioxidant, rust inhibitor, demulsifier, antifoaming agent and diluent oil can be further selected to further improve the compatibility of each raw material and improve the comprehensive performance and environmental performance of rotary vane vacuum pump oil.

[0044] In some embodiments of the present invention, the structural formula of the ionic liquid is:

[0045] At the same time, it can further improve the comprehensive performance and environmental performance of the rotary vane vacuum pump oil.

[0046] In some embodiments of the present invention, the antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

[0047] In some embodiments of the present invention, the rust inhibitor is selected from at least one of isononylphenoxyacetic acid and dodecenylsuccinic acid. In some embodiments of the present invention, the demulsifier is selected from at least one of oil-soluble polyethers and condensates of amines and ethylene oxide.

[0048] The present invention does not particularly limit the oil-soluble polyether, and the oil-soluble polyether commonly used in the art can be selected.

[0049] In the present invention, the condensate of amine and ethylene oxide refers to a compound formed by a condensation reaction between an amino group in an amino compound and an epoxy group in ethylene oxide. The present invention does not limit the amount of the compound participating in the condensation reaction, nor does it specifically limit the specific conditions of the condensation reaction, as long as the above-mentioned condensation reaction can occur.

[0050] In the present invention, the condensate can also be obtained through commercial purchase.

[0051] In some embodiments of the present invention, the anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil and polyacrylate.

[0052] The present invention does not impose any particular limitation on the molecular weight of the above polymer.

[0053] In some embodiments of the present invention, the base oil is selected from at least one of Group I base oil, Group II base oil and Group III base oil.

[0054] In the present invention, there is no particular limitation on the Class I base oil, Class II base oil and Class III base oil, and the Class I base oil, Class II base oil and Class III base oil commonly used in the art can be selected.

[0055] The rotary vane vacuum pump oil in some embodiments of the present invention can be obtained by uniformly mixing the raw materials according to the above composition. The present invention does not specifically limit the order of adding the raw materials, the stirring rate, and the mixing temperature.

[0056] The rotary vane vacuum pump oil of the present invention not only has relatively excellent comprehensive properties (anti-oxidation, anti-rust, anti-corrosion, anti-wear, anti-emulsification and anti-foaming) and environmental friendliness, but also has a simple preparation process, is easy to operate and has a wide range of applications.

[0057] A second aspect of the present invention provides a rotary vane vacuum pump, comprising the rotary vane vacuum pump oil described above.

[0058] In the present invention, since the stator, rotor, shaft seal, gear and bearing in the cavity of the rotary vane vacuum pump contain the rotary vane vacuum pump oil, the rotary vane vacuum pump has a long service life and is widely used in industry.

[0059] The technical solution of the present invention is further described below in conjunction with specific embodiments.

[0060] The structural formula of the ionic liquid in each embodiment and comparative example is Formula 1, which is obtained through commercial purchase;

[0061]

[0062] Where n is a positive integer selected from 6 to 14;

[0063] The oil-soluble polyether in each embodiment and comparative example is DL32;

[0064] The condensate of amine and ethylene oxide in each embodiment and comparative example is T1001;

[0065] The polymethyl silicone oil in each embodiment and comparative example is T901;

[0066] The polyacrylate in each embodiment and comparative example is T912;

[0067] The Group II base oil in each embodiment and comparative example is HVIH12.

[0068] Example 1

[0069] The composition of the rotary vane vacuum pump oil of this embodiment is shown in Table 1.

[0070] Table 1

[0071] name Mass percentage / % Ionic liquid (n=12) 3 Dioctyldiphenylamine 0.2 2,6-Di-tert-butyl-p-cresol 0.2 Dodecenylsuccinic acid 0.05 Oil soluble polyether 0.005 Dimethicone 0.003 Polyacrylate 0.003 Type II base oil 96.539

[0072] Example 2

[0073] The composition of the rotary vane vacuum pump oil of this embodiment is shown in Table 2.

[0074] Table 2

[0075] name Mass percentage / % Ionic liquid (n=6) 5 Octylbutyldiphenylamine 0.1 Isononylphenoxyacetic acid 1 Amine and ethylene oxide condensation product 0.5 Polyacrylate 0.5 Type II base oil 92.9

[0076] Example 3

[0077] The composition of the rotary vane vacuum pump oil of this embodiment is shown in Table 3.

[0078] Table 3

[0079]

[0080]

[0081] Example 4

[0082] The composition of the rotary vane vacuum pump oil of this embodiment is shown in Table 4.

[0083] Table 4

[0084] name Mass percentage / % Ionic liquid (n=12) 0.5 Dioctyldiphenylamine 1 2,6-Di-tert-butyl-p-cresol 1 Dodecenylsuccinic acid 0.3 Oil soluble polyether 0.1 Dimethicone 0.05 Polyacrylate 0.05 Type II base oil 97

[0085] Example 5

[0086] The composition of the rotary vane vacuum pump oil of this embodiment is shown in Table 5.

[0087] Table 5

[0088]

[0089]

[0090] Example 6

[0091] The composition of the rotary vane vacuum pump oil of this embodiment is shown in Table 6.

[0092] Table 6

[0093] name Mass percentage / % Ionic liquid (n=9) 1 Dioctyldiphenylamine 1 2,6-Di-tert-butyl-p-cresol 1 Dodecenylsuccinic acid 0.3 Oil soluble polyether 0.1 Dimethicone 0.05 Polyacrylate 0.05 Type II base oil 96.5

[0094] Comparative Example 1

[0095] The composition of the rotary vane vacuum pump oil of this comparative example is shown in Table 7.

[0096] Table 7

[0097] name Mass percentage / % Dioctyldiphenylamine 0.2 2,6-Di-tert-butyl-p-cresol 0.2 Dodecenylsuccinic acid 0.05 Oil soluble polyether 0.005 Dimethicone 0.003 Polyacrylate 0.003 Type II base oil 99.539

[0098] Comparative Example 2

[0099] The composition of the rotary vane vacuum pump oil of this comparative example is shown in Table 8.

[0100] Table 8

[0101] name Mass percentage / % Ionic liquid (n=6) 0.08 Octylbutyldiphenylamine 2 Isononylphenoxyacetic acid 1 Amine and ethylene oxide condensation product 0.5 Polyacrylate 0.5 Type II base oil 95.92

[0102] Comparative Example 3

[0103] The composition of the rotary vane vacuum pump oil of this comparative example is shown in Table 9.

[0104] Table 9

[0105] name Mass percentage / % Ionic liquid (n=9) 0.08 Dioctyldiphenylamine 0.04 2,6-Di-tert-butyl-p-cresol 0.04 Dodecenylsuccinic acid 0.005 Oil soluble polyether 0.0005 Dimethicone 0.0003 Polyacrylate 0.0002 Type II base oil 99.834

[0106] Performance Characterization

[0107] 1. The performance of Class II base oil was tested. The test results are shown in Table 10.

[0108] Table 10

[0109]

[0110]

[0111] 2. The performance of the rotary vane vacuum pump oils in the embodiments and comparative examples was tested. The test results are shown in Table 11.

[0112] Table 11

[0113]

[0114] It can be seen from Table 11 that the rotary vane vacuum pump oil prepared in the embodiment of the present invention has relatively excellent anti-oxidation, anti-rust, anti-corrosion, anti-wear, anti-emulsification and anti-foaming properties, especially has relatively excellent anti-oxidation and anti-wear properties.

[0115] 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 rotary vane vacuum pump oil, characterized in that: According to the mass percentage, it includes: Wherein, the structural formula of the ionic liquid is: The mass ratio of the antioxidant to the ionic liquid is 1:(0.5-1); The antioxidant is selected from at least one of dioctyldiphenylamine, dinonyldiphenylamine, octylbutyldiphenylamine, nonylbutyldiphenylamine, 2,6-di-tert-butyl-p-cresol and 4,4'-methylenebis(2,6-di-tert-butylphenol).

2. The rotary vane vacuum pump oil according to claim 1, characterized in that: According to the mass percentage, it includes:

3. The rotary vane vacuum pump oil according to claim 1 or 2, characterized in that: The rust inhibitor is selected from at least one of isononylphenoxyacetic acid and dodecenylsuccinic acid.

4. The rotary vane vacuum pump oil according to claim 1 or 2, characterized in that: The demulsifier is selected from at least one of oil-soluble polyethers and condensates of amines and ethylene oxide.

5. The rotary vane vacuum pump oil according to claim 3, characterized in that: The demulsifier is selected from at least one of oil-soluble polyethers and condensates of amines and ethylene oxide.

6. The rotary vane vacuum pump oil according to claim 1, 2 or 5, characterized in that: The anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil and polyacrylate.

7. The rotary vane vacuum pump oil according to claim 3, characterized in that: The anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil and polyacrylate.

8. The rotary vane vacuum pump oil according to claim 4, characterized in that: The anti-foaming agent is selected from at least one of dimethyl silicone oil, polymethyl silicone oil and polyacrylate.

9. The rotary vane vacuum pump oil according to claim 1 or 2 or 5 or 7 or 8, characterized in that: The base oil is selected from at least one of Group I base oil, Group II base oil and Group III base oil.

10. The rotary vane vacuum pump oil according to claim 3, characterized in that: The base oil is selected from at least one of Group I base oil, Group II base oil and Group III base oil.

11. The rotary vane vacuum pump oil according to claim 4, characterized in that: The base oil is selected from at least one of Group I base oil, Group II base oil and Group III base oil.

12. The rotary vane vacuum pump oil according to claim 6, characterized in that: The base oil is selected from at least one of Group I base oil, Group II base oil and Group III base oil.

13. A rotary vane vacuum pump, characterized in that: The invention comprises the rotary vane vacuum pump oil according to any one of claims 1 to 12.

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