阅读说明：本技术 一种耐水性润滑脂及其制备方法 (Water-resistant lubricating grease and preparation method thereof ) 是由 陈春华 时楠 陆红军 于 2021-08-05 设计创作，主要内容包括：本发明公开了一种耐水性润滑脂,包括80～100份的基础油、5～10份的脂肪酸、3～5份的氢氧化锂、1～2份的氢氧化钙、1～2份的抗氧剂、4～5份的极压剂、0.2～0.3份的增粘剂、0.1～0.2份的防锈剂。本发明能够改进现有技术的不足,在不使用消泡剂的同时,避免了润滑脂制备过程中大量泡沫的产生。(The invention discloses water-resistant lubricating grease which comprises 80-100 parts of base oil, 5-10 parts of fatty acid, 3-5 parts of lithium hydroxide, 1-2 parts of calcium hydroxide, 1-2 parts of antioxidant, 4-5 parts of extreme pressure agent, 0.2-0.3 part of tackifier and 0.1-0.2 part of antirust agent. The invention can improve the defects of the prior art, and avoids the generation of a large amount of foams in the preparation process of the lubricating grease while using no defoaming agent.)

1. A water-resistant grease characterized by:

the following parts are parts by weight;

the lubricant comprises 80-100 parts of base oil, 5-10 parts of fatty acid, 3-5 parts of lithium hydroxide, 1-2 parts of calcium hydroxide, 1-2 parts of antioxidant, 4-5 parts of extreme pressure agent, 0.2-0.3 part of tackifier and 0.1-0.2 part of antirust agent.

2. A method of preparing a water-resistant grease according to claim 1, comprising the steps of:

A. putting 40-50 parts of base oil and all fatty acids into a saponification kettle, heating to 80-85 ℃, and uniformly stirring;

B. adding all lithium hydroxide and calcium hydroxide into a saponification kettle, heating to 180-190 ℃, and stirring for 1-1.5 hours;

C. adding the residual base oil into the saponification kettle, quickly cooling to 105-110 ℃, pressurizing to 0.5-0.6 MPa in the saponification kettle, and stirring for 3-5 minutes;

D. and (3) decompressing the saponification kettle to atmospheric pressure, cooling to 65-70 ℃, adding all the antioxidant, the extreme pressure agent, the tackifier and the antirust agent into the saponification kettle, stirring for 3-5 minutes, and degassing to obtain a finished water-resistant lubricating grease product.

3. A method of preparing a water-resistant grease according to claim 2, characterized in that: the saponification cauldron includes casing (1), top cap (2) are installed at casing (1) top, top cap (2) bottom surface center is fixed with spacing (3), hydro-cylinder (4) are installed at top cap (2) top, piston (13) of hydro-cylinder (4) pass top cap (2) and are located spacing (3), install on piston (13) and inhale oil pipe (5) and go out oil pipe (6), circulating pump (7) are installed at top cap (2) top, inhale oil pipe (5) and go out oil pipe (6) and pass through hose (8) and be connected with circulating pump (7), it has cooler (9) to establish ties on hose (8) that oil pipe (6) and circulating pump (7) are connected, install heater (10) in casing (1) lateral wall.

4. A method of preparing a water-resistant grease according to claim 3, characterized in that: the limiting frame (3) comprises four limiting columns (11) which are arranged in a rectangular shape, the bottom ends of the limiting columns (11) are fixedly connected through a bottom plate (12), a piston (13) is in sliding contact with the limiting columns (11), and an oil suction pipe (5) and an oil outlet pipe (6) are respectively positioned between gaps between the two limiting columns (11).

5. A method of preparing a water-resistant grease according to claim 4, characterized in that: the oil suction pipe (5) and the oil outlet pipe (6) are connected with the piston (13) through the adjustable support (14) respectively, the adjustable support (14) comprises a base (15) fixed on the piston (13), a first connecting rod (17) is connected to the base (15) through a first pin shaft (16), the first connecting rod (17) is connected with a clamp (19) through a second pin shaft (18), the first pin shaft (16) is perpendicular to the second pin shaft (18) in rotation direction, and the first pin shaft (16) and the second pin shaft (18) are respectively provided with a limiting bolt (20).

6. A method of preparing a water-resistant grease according to claim 5, characterized in that: cooler (9) include heat conduction coil pipe (21) of being connected with hose (8), install in cooling cavity (22) heat conduction coil pipe (21), cooling cavity (22) are connected with cooling water circulating pipe (23), the inner wall of heat conduction coil pipe (21) evenly is provided with a plurality of annular groove (24), the feed liquor survey of annular groove (24) is fixed with water conservancy diversion support (25), a plurality of water conservancy diversion piece (26) have been arranged to the annular on water conservancy diversion support (25), one end orientation feed liquor side that water conservancy diversion piece (26) are close to water conservancy diversion support (25) centre of a circle, the other end orientation of water conservancy diversion piece (26) goes out the liquid side.

7. A method of preparing a water-resistant grease according to claim 6, characterized in that: the junction of annular groove (24) and heat conduction coil pipe (21) inner wall is provided with arc portion (27), and the radian that is located the arc portion (27) of feed liquor survey is greater than the radian that is located the arc portion (27) of liquid side.

Technical Field

The invention relates to the technical field of lubricating grease preparation, in particular to water-resistant lubricating grease and a preparation method thereof.

Background

Grease is widely used in various mechanical moving parts to protect the mechanical parts. In a water-rich or high-humidity use environment, the lubricating grease is easy to absorb water and thin, so that the lubricating function is lost. Lithium-based greases are a type of grease with better water resistance, but a large amount of foam is easily generated in the process of preparing the lithium-based grease, so that an antifoaming agent needs to be added, and the antifoaming agent has a negative effect on the performance of the grease itself.

Disclosure of Invention

The technical problem to be solved by the invention is to provide the water-resistant lubricating grease and the preparation method thereof, which can solve the defects of the prior art, and avoid the generation of a large amount of foams in the lubricating grease preparation process while using no defoaming agent.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

A water-resistant lubricating grease, the following parts are parts by weight;

the lubricant comprises 80-100 parts of base oil, 5-10 parts of fatty acid, 3-5 parts of lithium hydroxide, 1-2 parts of calcium hydroxide, 1-2 parts of antioxidant, 4-5 parts of extreme pressure agent, 0.2-0.3 part of tackifier and 0.1-0.2 part of antirust agent.

The preparation method of the water-resistant lubricating grease comprises the following steps:

A. putting 40-50 parts of base oil and all fatty acids into a saponification kettle, heating to 80-85 ℃, and uniformly stirring;

B. adding all lithium hydroxide and calcium hydroxide into a saponification kettle, heating to 180-190 ℃, and stirring for 1-1.5 hours;

C. adding the residual base oil into the saponification kettle, quickly cooling to 105-110 ℃, pressurizing to 0.5-0.6 MPa in the saponification kettle, and stirring for 3-5 minutes;

D. and (3) decompressing the saponification kettle to atmospheric pressure, cooling to 65-70 ℃, adding all the antioxidant, the extreme pressure agent, the tackifier and the antirust agent into the saponification kettle, stirring for 3-5 minutes, and degassing to obtain a finished water-resistant lubricating grease product.

Preferably, the saponification kettle comprises a shell, a top cover is installed at the top of the shell, a limiting frame is fixed at the center of the bottom surface of the top cover, an oil cylinder is installed at the top of the top cover, a piston of the oil cylinder penetrates through the top cover and is located in the limiting frame, an oil suction pipe and an oil outlet pipe are installed on the piston, a circulating pump is installed at the top of the top cover, the oil suction pipe and the oil outlet pipe are connected with the circulating pump through hoses, a cooler is connected in series to the hose, which is connected with the circulating pump, of the oil outlet pipe, and a heater is installed in the side wall of the shell.

Preferably, the limiting frame comprises four limiting columns which are arranged in a rectangular shape, the bottom ends of the limiting columns are fixedly connected through a bottom plate, the piston is in sliding contact with the limiting columns, and the oil suction pipe and the oil outlet pipe are respectively positioned between the two limiting columns.

Preferably, the oil suction pipe and the oil outlet pipe are respectively connected with the piston through adjustable supports, each adjustable support comprises a base fixed on the piston, the base is connected with a first connecting rod through a first pin shaft, the first connecting rod is connected with a clamp through a second pin shaft, the rotating directions of the first pin shaft and the second pin shaft are mutually perpendicular, and the first pin shaft and the second pin shaft are respectively provided with a limiting bolt.

Preferably, the cooler comprises a heat conduction coil connected with a hose, the heat conduction coil is installed in a cooling cavity, the cooling cavity is connected with a cooling water circulation pipe, a plurality of annular grooves are uniformly formed in the inner wall of the heat conduction coil, a flow guide support is fixed to the liquid inlet side of each annular groove, a plurality of flow deflectors are annularly arranged on the flow guide support, one ends, close to the circle center of the flow guide support, of the flow deflectors face to the liquid inlet side, and the other ends of the flow deflectors face to the liquid outlet side.

Preferably, the connection part of the annular groove and the inner wall of the heat conducting coil is provided with an arc part, and the radian of the arc part positioned at the liquid inlet side is larger than that of the arc part positioned at the liquid outlet side.

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: the invention abandons the mode that the prior saponification kettle uses a stirring paddle to stir the production raw materials, and fundamentally avoids the problem that air enters the raw materials to form foam in the stirring process. Meanwhile, in order to ensure the speed of the saponification reaction, the invention uses the circulating pump to circulate the raw materials, and realizes the uniform stirring of the raw materials in the saponification kettle by utilizing the flowing of the raw materials. Because the circulation flow of the raw materials is completely positioned below the liquid level, the air is prevented from entering the cylinder to drive the piston up and down, and the raw material liquid with different depths can be fully stirred. The adjustable support is used for fixing the oil suction pipe and the oil outlet pipe, and the fixed angle of the oil suction pipe and the fixed angle of the oil outlet pipe can be adjusted through the adjustable support, so that different stirring requirements are met. In the process of preparing the lithium-based lubricating grease, the raw material liquid needs to be rapidly cooled, and the invention realizes the rapid cooling of the raw material liquid by utilizing an external circulating flow pipeline of the raw material liquid and additionally arranging a cooler. In the prior art, in order to improve the cooling heat exchange efficiency, various fins are arranged inside and outside the heat exchange coil pipe to increase the heat exchange contact area, but the mode easily causes the raw material liquid to generate foam. In order to avoid the problem, the guide bracket is used for continuously guiding the raw material liquid in the heat conduction coil from the central part to the edge part close to the side wall of the heat conduction coil, so that the heat exchange efficiency of the raw material liquid and the cooling water is improved. The annular groove is used for reserving enough space for radial flow of raw material liquid, and the arc part can avoid direct impact of the raw material liquid and the side wall of the annular groove, so that the possibility of generating foam in the flowing process of the raw material liquid is reduced.

Drawings

FIG. 1 is a schematic diagram of a saponification vessel in accordance with one embodiment of the present invention.

Fig. 2 is a top view of a spacing block in accordance with an embodiment of the present invention.

Fig. 3 is a block diagram of an adjustable support in accordance with an embodiment of the present invention.

FIG. 4 is an enlarged view of a portion of a thermally conductive coil in accordance with one embodiment of the present invention.

In the figure: 1. a housing; 2. a top cover; 3. a limiting frame; 4. an oil cylinder; 5. an oil suction pipe; 6. an oil outlet pipe; 7. a circulation pump; 8. a hose; 9. a cooler; 10. a heater; 11. a limiting column; 12. a base plate; 13. a piston; 14. an adjustable support; 15. a base; 16. a first pin shaft; 17. a first link; 18. a second pin shaft; 19. a clamp; 20. a limit bolt; 21. a heat conducting coil; 22. a cooling chamber; 23. a cooling water circulation pipe; 24. an annular groove; 25. a flow guide bracket; 26. a flow deflector; 27. an arc-shaped portion.

Detailed Description

The water-resistant lubricating grease provided by the invention comprises,

the following parts are all parts by weight,

95 parts of base oil (500SN), 5 parts of fatty acid, 4 parts of lithium hydroxide, 1 part of calcium hydroxide, 1 part of antioxidant (diphenylamine), 5 parts of extreme pressure agent (aminothioester), 0.2 part of tackifier (polyisobutylene), and 0.1 part of antirust agent (barium dinonylnaphthalene sulfonate).

The preparation method of the water-resistant lubricating grease comprises the following steps:

A. putting 50 parts of base oil and all fatty acid into a saponification kettle, heating to 80 ℃, and uniformly stirring;

B. adding all lithium hydroxide and calcium hydroxide into a saponification kettle, heating to 185 ℃, and stirring for 1 hour;

C. adding the rest base oil into the saponification kettle, rapidly cooling to 105 deg.C, pressurizing to 0.6Mpa in the saponification kettle, and stirring for 5 min;

D. and (3) decompressing the saponification kettle to one atmosphere, cooling to 65 ℃, adding all the antioxidant, the extreme pressure agent, the tackifier and the antirust agent into the saponification kettle, stirring for 3 minutes, and degassing to obtain a finished product of the water-resistant lubricating grease.

Referring to fig. 1-4, the saponification kettle comprises a shell 1, a top cover 2 is installed at the top of the shell 1, a limiting frame 3 is fixed at the center of the bottom surface of the top cover 2, an oil cylinder 4 is installed at the top of the top cover 2, a piston 13 of the oil cylinder 4 penetrates through the top cover 2 and is located in the limiting frame 3, an oil suction pipe 5 and an oil outlet pipe 6 are installed on the piston 13, a circulating pump 7 is installed at the top of the top cover 2, the oil suction pipe 5 and the oil outlet pipe 6 are connected with the circulating pump 7 through a hose 8, a cooler 9 is connected in series on the hose 8, which is connected with the circulating pump 7, of the oil outlet pipe 6, and a heater 10 is installed in the side wall of the shell 1. The limiting frame 3 comprises four limiting columns 11 which are arranged in a rectangular shape, the bottom ends of the limiting columns 11 are fixedly connected through a bottom plate 12, a piston 13 is in sliding contact with the limiting columns 11, and the oil suction pipe 5 and the oil outlet pipe 6 are respectively positioned between gaps between the two limiting columns 11. The oil suction pipe 5 and the oil outlet pipe 6 are respectively connected with the piston 13 through an adjustable support 14, the adjustable support 14 comprises a base 15 fixed on the piston 13, a first connecting rod 17 is connected to the base 15 through a first pin shaft 16, the first connecting rod 17 is connected with a clamp 19 through a second pin shaft 18, the rotating directions of the first pin shaft 16 and the second pin shaft 18 are mutually perpendicular, and a limiting bolt 20 is respectively installed on the first pin shaft 16 and the second pin shaft 18. Cooler 9 includes heat conduction coil 21 of being connected with hose 8, heat conduction coil 21 installs in cooling cavity 22, cooling cavity 22 is connected with cooling water circulating pipe 23, heat conduction coil 21's inner wall evenly is provided with a plurality of annular groove 24, annular groove 24's feed liquor survey is fixed with water conservancy diversion support 25, a plurality of water conservancy diversion piece 26 of annular having arranged on the water conservancy diversion support 25, the one end that water conservancy diversion piece 26 is close to the water conservancy diversion support 25 centre of a circle is towards the feed liquor side, the other end of water conservancy diversion piece 26 is towards out the liquid side. The junction of annular groove 24 and heat conduction coil 21 inner wall is provided with arc portion 27, and the radian that is located the arc portion 27 of liquid inlet survey is greater than the radian that is located the arc portion 27 of liquid side.

When the oil suction pipe 5 and the oil outlet pipe 6 are used for circularly stirring the raw material liquid, the oil cylinder 4 drives the oil suction pipe 5 and the oil outlet pipe 6 to move up and down, the circulating pump 7 drives the flow rate of the raw material liquid to be in direct proportion to the distance between the oil outlet pipe 6 and the liquid level of the raw material liquid, on the basis, when the rapid cooling process of the step C is carried out, the flow rate of the circulating pump 7 is reduced to 50% of the current flow rate, the rapid cooling process is finished, and the flow rate of the circulating pump 7 is recovered to be normal. Through the optimal control to the stock solution circulation velocity of flow, reduced the disturbance to the stock solution liquid level, reduced the production of foam, improved the cooling rate of quick cooling process simultaneously.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.