CN114407401A - Flanging bearing for photovoltaic rotary driving device and preparation process thereof - Google Patents

Abstract

The invention relates to the technical field of bearings, and discloses a flanging bearing for a photovoltaic rotation driving device and a preparation process thereof, wherein the flanging bearing at least comprises the following steps: and mixing the prefabricated lining cloth with glue solution, flatly paving the mixture on a steel plate, solidifying and cooling the mixture, then manufacturing the mixture into a target shape and size in a pipe coiling machine, putting the target shape and size into a tool to press and turn the flange, and finally processing the flange at the corner to obtain the flange bearing. The cost is reduced from the raw materials by reducing the copper powder layer, the traditional production process technology is optimized, the production cost is further reduced from the process level, in addition, the copper removal not only fundamentally avoids the generation of part of pollutants in the production process, but also enables the finished product to be more environment-friendly, and simultaneously, compared with the traditional three-layer flanging bearing, the bearing capacity and the friction resistance of the bearing are better, and the double-layer flanging bearing can effectively run for more than 30 years through test certification.

Description

Flanged bearing for photovoltaic rotary drive device and preparation process thereof

technical field

The invention relates to the technical field of bearings, in particular to a flanging bearing for a photovoltaic rotary drive device and a preparation process thereof.

Background technique

At present, the three-layer composite flanging bearing on the market is widely used because of its relatively excellent performance. Chinese patent CN201911176886.4 discloses a three-layer composite self-lubricating material and its preparation method. With the copper powder layer on one side and the self-lubricating layer embedded in the copper powder layer, the material has good friction and wear resistance under dry friction and oil lubrication conditions.

However, since the copper powder layer between the metal matrix layer and the self-lubricating layer is used as the attachment of the self-lubricating layer, its thickness is generally not too thick, about 0.1-0.3mm, which leads to its bearing capacity is not too high; at the same time The production process of the three-layer flanging bearing is relatively complicated, and the existing flanging process is mostly stamping and forming, which greatly increases the possibility of cracking at the flanging. In addition, the copper powder layer will inevitably generate some pollutants in the production process, which will have an adverse impact on environmental protection, and the cost of copper is slightly higher than that of the other two materials, which increases the production cost.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a flanging bearing for a photovoltaic rotary drive device and a preparation process thereof, which are used to solve the problem of insufficient bearing capacity of the three-layer composite flanging bearing in the prior art, and not only reduce the cost through copper removal , and fundamentally eliminate the generation of pollutants in the production process, in addition to optimize the production process of the flanged bearing, further reducing the production cost.

In order to achieve the above object, one aspect of the present invention provides a process for preparing a flanging bearing for a photovoltaic rotary drive device, which at least includes the following steps: mixing a prefabricated pad cloth with glue, and then laying it on a pretreated steel plate. After solidification and cooling, it is made into the target shape and size in the tube rolling machine, and then put into the tooling to press the flanging, and finally the flanging bearing is obtained by processing the edges and corners;

The mass ratio of the liner cloth to the glue solution is 1:(0.1-0.3).

In some embodiments, the prefabrication is to weave warp yarns and weft yarns to obtain a backing fabric, the warp yarns include PTFE fibers, and the weft yarns include PA fibers, PI fibers, UPE fibers, aramid fibers, carbon fibers, and glass fibers. a kind of.

Preferably, the warp yarns are PTFE fibers, and the weft yarns are PI fibers.

In some embodiments, the linear density of the PTFE fiber is 350-550D, and the shrinkage rate under the condition of 250°C/30min is less than 3%.

More preferably, the linear density of the PTFE fiber is 400-500D, and the shrinkage rate under the condition of 250°C/30min is less than 2%.

The PTFE fiber can be purchased commercially, including but not limited to the PTFE fiber purchased from Shanghai Jinyou Fluorine Materials Co., Ltd., and the model is one of JUWY-S400-S and JUWY-S500-S.

In some embodiments, the weft yarns are PI fibers.

Preferably, the linear density of the PI fiber is 200-500D, and the elongation is 2.8-3.4%.

Described PI fiber can be obtained by commercially available, including but not limited to described PI fiber is purchased from Shanghai Liluo Industrial Co., Ltd., and the model is a kind of in S30T, S30, S30M.

In some embodiments, the backing cloth has an areal density of 180-220 g/m ² .

In some embodiments, the backing cloth has an areal density of 200 g/m ² .

In some embodiments, the thickness of the backing cloth is 0.2-0.4mm, which can be exemplified by 0.2mm, 0.3mm, and 0.4mm.

At present, with the advancement of sustainable development, the application of solar photovoltaic panels is more extensive. Since photovoltaic panels work in outdoor conditions for a long time, higher requirements are placed on flanging bearings for photovoltaic slewing drives, especially heavy loads and low speeds cannot be refueled. In the field of photovoltaic rotary drive, the flanging bearings made of three-layer composite materials commonly used on the market usually add a copper powder layer as the attachment of the self-lubricating layer, so as to play a good wear resistance effect, and the thickness of the copper powder layer is average. It is 0.1-0.3mm, which determines that the bearing capacity of the prepared bearing will not be too high, and the copper powder layer will inevitably produce some pollutants during the production process, which will have an adverse impact on environmental protection. Later, it was found that the backing cloth was obtained by weaving specific warp and weft yarns, and then the backing cloth was specially treated, and then mixed with glue and then compounded with steel. Compared with the commonly used three-layer composite material, the flanging bearing prepared Excellent friction and lubrication performance, higher bearing capacity and longer life, and the realization of copper removal, not only more environmentally friendly, but also reduce costs, the inventor believes that the possible reason is that on the one hand, specific warp and weft yarns are used for Weaving, while controlling the surface density and thickness of the formed backing cloth, under this condition, more suitable weaving pores can be formed, which can not only ensure high bearing capacity, but also have excellent resistance to deformation and weathering, and is used in photovoltaic drives. During the rotation of the device, the problem of failure due to long-term operation and aging and extreme changes in the external environment is prevented. At the same time, the appropriate weaving pores can ensure a high bearing capacity while immersing a certain amount of glue into the woven fabric. After curing Afterwards, it forms a good bonding force with the steel to ensure that the lining cloth and the steel will not separate or fall off during use.

In some embodiments, the conditions for mixing the liner cloth with the glue solution are: the temperature is 40-60°C, and the time is 8-12 minutes.

Preferably, the specific operation of mixing the liner cloth with the glue solution includes: using a scraper to scrape the glue solution onto the liner cloth, so that the glue solution is immersed inside the liner cloth, and then at a temperature of 40-60° C. Set aside for 8-12 minutes until the surface of the lining cloth is not sticky.

In the research, the inventor found that in the process of mixing the liner cloth with the glue, a scraper was used to immerse the glue inside the liner cloth, and then placed at a certain temperature until it was not sticky, and then combined with the steel plate, it could diffuse and penetrate to promote the glue. Infiltrate the fibers and reduce the internal formation of air bubbles, so that the phenomenon of bulging and uneven surface occurs after being combined with the steel plate.

In some embodiments, the glue solution includes a phenolic resin adhesive.

Preferably, the phenolic resin adhesive can be purchased commercially, including but not limited to the phenolic resin adhesive can be purchased from Henan Bangde Chemical Co., Ltd., Finnish Tyre Chemical Co., Ltd., and U.S. San Leikete Chemical Co., Ltd.

In some embodiments, the curing equipment includes a flat vulcanizer.

In some embodiments, the curing temperature is 100-300°C, the pressure is 4-6MPa, and the time is 1-2h.

The curing conditions have a key impact on the composite strength of the backing cloth and the steel. If the curing conditions are not suitable, the strength of the prepared bearing and the bonding strength between the two will be insufficient. The pressure and time allow the warp and weft yarns to be wetted by the phenolic resin binder molecules and physically cross-link more tightly with the steel, resulting in an excellent bond.

In some embodiments, the steel comprises SPCC carbon steel.

In some embodiments, the thickness of the steel material is 1-3 mm, which can be exemplified by 1 mm, 2 mm, and 3 mm.

In some embodiments, the steel plate further includes pretreatment, including but not limited to grinding and/or acid treatment, to remove oil stains and oxides on the surface of the steel, while increasing the surface roughness, thereby increasing the bond with the steel plate. combine.

Another aspect of the present invention provides a flanged bearing obtained by the above-mentioned preparation process.

The flanging bearing includes a base steel and a lining cloth covered on the inner wall of the base steel. The minimum inner diameter and the maximum outer circle shape include but are not limited to circular, which can be adjusted accordingly according to the different fittings used. Minimum inner diameter and maximum outer shape.

The invention adopts the pipe rolling machine to process into the target shape, and presses the flanging through the tooling, so as to avoid the phenomenon of cracking at the flanging caused by stamping and forming in the traditional process.

Beneficial effects of the present invention:

Compared with the commonly used three-layer composite material, the flanging bearing prepared by knitting specific warp and weft yarns is used to obtain the backing cloth, and then the backing cloth is specially treated, and then mixed with glue and then compounded with steel. Excellent friction and lubrication performance, higher bearing capacity and longer life, the flanging bearing has been certified by test data to operate effectively for more than 30 years, and it has achieved de-coppering, which is not only more environmentally friendly, but also reduces costs; and By adjusting the curing temperature, pressure and time, the backing cloth can be infiltrated through the phenolic resin adhesive molecules and more closely combined with the steel to ensure the stability of the structure; it is very suitable for photovoltaic rotation with heavy load and low speed and cannot be refueled. drive field.

Description of drawings

Fig. 1 is the top view of the flanging bearing of the present invention;

2 is a cross-sectional view of the flanged bearing of the present invention along the A-B direction;

FIG. 3 is a partial enlarged view of FIG. 2 .

In the figure, 1. base steel; 2. lining cloth.

Detailed ways

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.

Example 1

Referring to FIGS. 1-3 , on the one hand, this embodiment provides a flanging bearing for a photovoltaic rotary drive device, which includes a base steel 1 and a backing cloth 2 covered on the inner wall of the base steel. The minimum inner hole and the maximum The outer circle is circular.

The present embodiment on the other hand provides a kind of preparation technology of flanging bearing for photovoltaic rotary drive device, comprises the following steps:

Weaving the warp and weft yarns to obtain a lining cloth, scrape the glue onto the lining cloth with a scraper, so that the glue is immersed inside the lining cloth, and then stand at a temperature of 50 ℃ for 10 minutes until the surface of the lining cloth It does not stick to the hand, and then lay it flat on the pretreated SPCC carbon steel with a thickness of 2mm, put it in a flat vulcanizer with a set temperature, pressurize and heat it to solidify, and cool it in a tube rolling machine to make the target shape and size. Then put it into the tooling to press the flanging, and finally the flanging bearing is obtained by processing the edges and corners.

The mass ratio of the liner cloth to the glue solution is 1:0.2.

The glue solution is a phenolic resin adhesive, purchased from Jinan Dahui Chemical Technology Co., Ltd.

The warp yarns are PTFE fibers, and the weft yarns are PI fibers.

The PTFE fiber was purchased from Shanghai Jinyou Fluorine Materials Co., Ltd., the model is JUWY-S500-S, the linear density is 500D, and the shrinkage rate under the condition of 250° C./30min is less than 2%.

The PI fiber was purchased from Shanghai Liluo Industrial Co., Ltd., the model is S30M, and the elongation is 2.8-3.2%.

The area density of the backing cloth was 200 g/m ² .

The thickness of the backing cloth is 0.3 mm.

The pretreatment steps of the carbon steel include first grinding with 0# sandpaper, then treating with an aqueous hydrochloric acid solution with a mass concentration of 5% at 40°C for 15 minutes, and then washing with ethanol.

The curing temperature is 200°C, the pressure is 5MPa, and the time is 1.5h.

Example 2

Referring to FIGS. 1-3 , on the one hand, this embodiment provides a flanging bearing for a photovoltaic rotary drive device, which includes a base steel 1 and a backing cloth 2 covered on the inner wall of the base steel. The minimum inner hole and the maximum The outer circle is circular.

The present embodiment on the other hand provides a kind of preparation technology of flanging bearing for photovoltaic rotary drive device, comprises the following steps:

Weaving the warp and weft yarns to obtain a lining cloth, scrape the glue onto the lining cloth with a scraper, so that the glue is immersed inside the lining cloth, and then stand at a temperature of 40 ° C for 8 minutes until the surface of the lining cloth It does not stick to the hand, and then lay it flat on the pretreated SPCC carbon steel with a thickness of 2mm, put it in a flat vulcanizer with a set temperature, pressurize and heat it to solidify, and after cooling, it is made into a target shape and size in a tube rolling machine, and then Put it into the tooling to press the flanging, and finally obtain the flanging bearing by processing the corners.

The mass ratio of the liner cloth to the glue solution is 1:0.1.

The glue solution is a phenolic resin adhesive, which was purchased from St. Lecott Chemical Company in the United States.

The warp yarns are PTFE fibers, and the weft yarns are PI fibers.

The PTFE fiber was purchased from Shanghai Jinyou Fluorine Materials Co., Ltd., the model is JUWY-S500-S, the linear density is 500D, and the shrinkage rate under the condition of 250° C./30min is less than 2%.

The PI fiber was purchased from Shanghai Liluo Industrial Co., Ltd., the model is S30M, and the elongation is 2.8-3.2%.

The area density of the backing cloth was 200 g/m ² .

The thickness of the backing cloth was 0.2 mm.

The pretreatment steps of the carbon steel include first grinding with 0# sandpaper, then treating with an aqueous hydrochloric acid solution with a mass concentration of 5% at 40°C for 15 minutes, and then washing with ethanol.

The curing temperature is 280°C, the pressure is 4MPa, and the time is 2h.

Example 3

Referring to FIGS. 1-3 , on the one hand, this embodiment provides a flanging bearing for a photovoltaic rotary drive device, which includes a base steel 1 and a backing cloth 2 covered on the inner wall of the base steel. The minimum inner hole and the maximum The outer circle is circular.

The present embodiment on the other hand provides a kind of preparation technology of flanging bearing for photovoltaic rotary drive device, comprises the following steps:

Weaving the warp and weft yarns to obtain a lining cloth, scrape the glue onto the lining cloth with a scraper, so that the glue is immersed inside the lining cloth, and then stand at a temperature of 60°C for 12 minutes until the surface of the lining cloth It does not stick to the hand, and then lay it flat on the pretreated SPCC carbon steel with a thickness of 2mm, put it in a flat vulcanizer with a set temperature, pressurize and heat it to solidify, and after cooling, it is made into a target shape and size in a tube rolling machine, and then Put it into the tooling to press the flanging, and finally obtain the flanging bearing by processing the corners.

The mass ratio of the liner cloth to the glue liquid is 1:0.3.

The glue solution is a phenolic resin adhesive, which was purchased from St. Lecott Chemical Company in the United States.

The warp yarns are PTFE fibers, and the weft yarns are PI fibers.

The PTFE fiber was purchased from Shanghai Jinyou Fluorine Materials Co., Ltd., the model is JUWY-S500-S, the linear density is 500D, and the shrinkage rate under the condition of 250° C./30min is less than 2%.

The PI fiber was purchased from Shanghai Liluo Industrial Co., Ltd., the model is S30M, and the elongation is 2.8-3.2%.

The area density of the backing cloth was 200 g/m ² .

The thickness of the backing cloth was 0.4 mm.

The pretreatment steps of the carbon steel include first grinding with 0# sandpaper, then treating with an aqueous hydrochloric acid solution with a mass concentration of 5% at 40°C for 15 minutes, and then washing with ethanol.

The curing temperature was 120° C., the pressure was 6 MPa, and the time was 1 h.

Comparative Example 1

This comparative example is a traditional three-layer flanging bearing, which sequentially includes a carbon steel layer, a bronze powder layer, and a self-lubricating layer. The thickness of the carbon steel layer is 2 mm, the thickness of the bronze powder layer is 0.2 mm, and the thickness of the self-lubricating layer is 0.03mm;

The self-lubricating layer includes 70% of polytetrafluoroethylene, 25% of carbon fiber, and 5% of phenolic resin according to the weight percentage.

Performance Testing

1. Bonding strength

The flanging bearing prepared in Example 1 was tested for the bonding strength between the steel matrix and the backing cloth according to the SAE standard, and the test results are shown in Table 1.

2. Friction resistance

The bearings prepared in Examples 1-3 and Comparative Example 1 were tested for dry friction coefficient, highest static load, highest dynamic load and highest PV value according to GB/T3960-2016 standard, wherein the test conditions were: load 5MPa, load speed 0.15m/ s, the test results are shown in Table 1.

Table 1

Numbering Example 1 Example 2 Example 3 Comparative Example 1 Binding Strength (N/IN) 13 10 11 / dry friction coefficient 0.085 0.105 0.11 0.12 Maximum static load (N/mm²) 462 455 452 250 Maximum dynamic load (N/mm²) 370 365 361 140 Maximum PV value (mm³.m/s) 3.6 3.55 3.58 3.0

The above are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields , are similarly included in the scope of patent protection of the present invention.

Claims (10)

1. A preparation process of a flanging bearing for a photovoltaic rotation driving device is characterized by at least comprising the following steps: mixing the prefabricated lining cloth with glue solution, then flatly paving the mixture on a pretreated steel plate, solidifying and cooling the mixture, putting the mixture into a pipe coiling machine to be manufactured into a target shape and size, putting the product into a tool to be pressed for flanging, and finally processing the flanged bearing at corners;

the mass ratio of the lining cloth to the glue solution is 1: (0.1-0.3).

2. The manufacturing process of the flanging bearing for the photovoltaic rotary driving device according to claim 1, wherein the prefabrication is to weave warp yarns and weft yarns to obtain lining cloth, the warp yarns comprise PTFE fibers, and the weft yarns comprise one of PA fibers, PI fibers, UPE fibers, aramid fibers, carbon fibers and glass fibers.

3. The preparation process of the flanging bearing for the photovoltaic rotary driving device as claimed in claim 1, wherein the surface density of the lining cloth is 180-220g/m²。

4. The preparation process of the flanging bearing for the photovoltaic rotary driving device according to claim 3, wherein the surface density of the lining cloth is 200g/m²。

5. The manufacturing process of the flanging bearing for the photovoltaic rotary driving device according to claim 3, wherein the thickness of the lining cloth is 0.2-0.4 mm.

6. The preparation process of the flanging bearing for the photovoltaic rotary driving device according to any one of claims 1-5, wherein the conditions for mixing the lining cloth and the glue solution are as follows: the temperature is 40-60 ℃, and the time is 8-12 min.

7. The preparation process of the flanging bearing for the photovoltaic rotary driving device according to claim 1, wherein the glue solution comprises a phenolic resin adhesive.

8. The process for preparing the flanging bearing for the photovoltaic rotary driving device according to claim 1, wherein the equipment for curing comprises a flat vulcanizing machine.

9. The preparation process of the flanging bearing for the photovoltaic rotary driving device as claimed in claim 8, wherein the curing temperature is 100 ℃ and 300 ℃, the pressure is 4-6 MPa, and the time is 1-2 h.

10. A flanged bearing obtained by the process according to any one of claims 1 to 9.

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