A device for bearing wear-resistant mixed copper powder

Abstract

The invention discloses a device for bearing wear-resistant mixed copper powder, including a dispersion tank, a heating device, a liquid adder, a transmission pipe, a storage box, a nozzle, and a pulser; the liquid storage tank is located above the reaction tank, and the storage box is located below the reaction tank; an agitator is arranged inside the dispersion tank, a powder feed port and a liquid feed port are arranged on the top, and a solenoid valve is arranged at the bottom; the nozzle is located at the bottom of the storage box; the liquid adder includes a liquid storage tank; a flow valve is connected to the bottom of the liquid storage tank; the flow valve is connected to a liquid outlet pipe; the powder feed port and the liquid feed port are respectively provided with a powder feed port cover and a liquid feed port cover; the liquid outlet pipe is inserted into the liquid feed port cover and is located in the liquid feed port; the liquid storage tank is provided with an auxiliary agent inlet and a low boiling point solvent inlet; the outer wall of the liquid storage tank is provided with a heating and heat-insulating layer; the liquid storage tank is provided with an air suction hood, and the air suction hood is connected to the solvent recovery tank through an air pipe. The preliminary dispersion of the auxiliary agent can be achieved by high-speed shearing, and the viscosity of the system can be reduced by heating to help the dispersion of the copper powder and the auxiliary agent.

Description

Technical Field

[0001] The invention relates to a reaction device, in particular to a device for bearing wear-resistant mixed copper powder. Background Art

[0002] Self-lubricating bearing plates are used in the production and processing of sliding bearings, based on metal plates sintered with copper alloy powder. Self-lubricating bearing plates have the characteristics of high load-bearing capacity, impact resistance, high temperature resistance, strong self-lubricating ability, and corrosion resistance. Products made of self-lubricating bearing plates are particularly suitable for heavy loads, low speeds, reciprocating or swinging, and other occasions that are difficult to lubricate and form oil films. They are mainly used to make three types of products: boundary lubricated bearings, oil-free lubricated bearings, and bimetallic bearings. At present, the products have been widely used in engineering machinery, automobiles, plastic molding machinery, hydraulic components, logistics and port machinery, punching and forging machinery, agricultural machinery, office equipment, food machinery, energy facilities and other fields. The sintering process of sintering copper alloy powder mixed with organic components onto metal plates plays an important role in the performance of self-lubricating bearing plates. The copper alloy powder sintering commonly used on the market is prone to damage such as reduced wear resistance, looseness, and peeling under the combined effects of load and natural environment. The key reason is that the copper alloy powder dispersion device is not applicable. Summary of the invention

[0003] The purpose of the present invention is to provide a device for bearing wear-resistant mixed copper powder. Through the preliminary treatment of organic additives, the copper powder and the organic system can be effectively stirred evenly, and the reaction performance of each organic component can be improved. Then, pulse spraying is used to meet the requirements of efficient and stable production of high-viscosity copper powder system.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] A device for bearing wear-resistant mixed copper powder, the device for bearing wear-resistant mixed copper powder comprises a dispersion tank, a heating device, a liquid adder, a transmission pipe, a storage box, a nozzle, and a pulser; the heating device is located on the outer wall of the dispersion tank; an agitator is arranged inside the dispersion tank, a powder feed port and a liquid feed port are arranged on the top, and an electromagnetic valve is arranged on the bottom; the transmission pipe connects the electromagnetic valve and the storage box; the pulser is located on the top of the storage box, and the nozzle is located on the bottom of the storage box; the liquid adder comprises a liquid storage tank; a flow valve is connected to the bottom of the liquid storage tank; the flow valve is connected to a liquid outlet pipe; the liquid outlet pipe is located in the liquid feed port; the liquid storage tank is provided with an auxiliary agent inlet and a low-boiling point solvent inlet; a heating and heat-insulating layer is provided on the outer wall of the liquid storage tank; the liquid storage tank is provided with an air suction hood; the air suction hood is connected to a solvent recovery tank through an air pipe; the side wall of the solvent recovery tank is provided with a gas inlet, a liquid outlet, and a supplementary solvent inlet, and a porous separation plate is arranged inside; the liquid outlet is connected to the low-boiling point solvent inlet through a liquid pump.

[0006] In the above technical solution, the liquid storage tank is located above the reaction tank body; the material storage box is located below the reaction tank body; this facilitates the conveying of materials by gravity and complies with the production process.

[0007] In the above technical solution, the additive inlet is provided with an additive inlet cover, and the supplementary solvent inlet is provided with a supplementary solvent inlet cover; thus, no leakage occurs when the solvent is heated and volatilized or recovered. The porous separation plate is an existing product, which can separate a small amount of additive components contained in the recovered solvent, such as porous silica gel adsorption.

[0008] The use of a heating device for mixing and dispersing copper powder is an innovation of the present invention. The use of a heating device can reduce the viscosity of the system, making the copper powder and the organic components dispersed more evenly, and avoiding the problem of adhesion in the dead corners of the agitator. Preferably, the heating device is located at the lower part of the outer wall of the dispersion tank body to more accurately heat the copper powder / liquid system. The heater can be a flexible heating sheet, and the heat provided can reduce the viscosity of the organic components, which is different from the ultrasonic cavitation mechanism.

[0009] In the above technical solution, the agitator speed is adjustable between 8000 and 9000 rpm, and has a shearing effect. The agitator includes a stirring rod and a stirring blade; the stirring blade is a spiral structure; the specific parameters of the spiral structure are not limited. When the copper powder system passes through the spiral structure in the tank, a spiral flow is formed, so that the fluid's own movement inertia keeps it in a spinning flow, avoiding the problems of poor mechanical properties and weak flow inertia of existing structures such as spring type and flat plate type.

[0010] Preferably, the stirring blade is provided with a plurality of holes; the diameter of the holes is 1 to 1.5 mm. The dispersion effect of the blade with a smooth surface is slightly weaker, but for the particularity of the wear-resistant copper powder, if conventional structures such as grooves and protrusions are used, it will have a counter-effect, especially copper powder will gather at the interface of the structure. The present invention creatively provides holes in the blade and limits the diameter of the holes, thereby further improving the dispersion effect.

[0011] In the above technical scheme, the pulser gas outlet is a prior art, and the present invention is used for copper powder dispersion for the first time. Intermittent injection of pulse gas into the storage box will impact the copper powder system and make it sprayed onto the substrate from the existing nozzle, such as a powder nozzle. At the same time, the pulse is beneficial to the dispersion of copper powder and the reaction of organic matter. The shape of the storage box is not particularly limited, and it can be a regular square, circle, cone, or an irregular structure, such as a combination of square and cone structures. The installation of the pulser and the nozzle on the storage box belongs to the prior art. Under the impact of the pulse gas, the dispersed copper powder can be effectively sprayed onto the base plate.

[0012] Preferably, the powder feed port and the liquid feed port are provided with a powder feed port cover and a liquid feed port cover respectively; thereby preventing leakage of the copper powder during the dispersion process; inserting the liquid outlet pipe into the liquid feed port cover can realize batch addition of liquid additives, and there is no requirement for the insertion depth.

[0013] The difficulty of the existing high-performance copper powder system is that it is difficult to disperse, resulting in poor reaction uniformity and controllability; the present invention starts with dispersing additives, firstly adds several additives that are difficult to mix into a liquid storage tank respectively, dissolves and mixes them in a low-boiling point solvent, and then heats to remove most of the solvent, and the obtained mixture is used for copper powder treatment; in the dispersion process of high-viscosity copper powder, after the copper powder is fed, the additives are added in batches in chronological order from the liquid feed port, and the initial dispersion of the copper powder additives can be achieved through high-speed shearing, and the viscosity of the system can be reduced through heating, which helps the dispersion of the additives, accelerates the non-aggregation of copper powder components and related chemical reactions, shortens the reaction time, and improves the stability of the reaction, thereby effectively improving the stability and production efficiency of the high-viscosity copper powder; and a low-boiling point solvent recovery structure is designed for effective recycling.

[0014] The present invention adopts auxiliary agent dispersion technology, and on the basis of high-speed shear dispersion equipment, it is assisted by heating, so as to improve the production efficiency and stability of high-viscosity copper powder, and at the same time can also reduce energy consumption, improve the uniformity of reaction, and effectively overcome the adverse effects of high viscosity on the dispersion effect of auxiliary agents and reaction uniformity, which is beneficial to improving product quality and can meet the needs of continuous production. The device for bearing wear-resistant mixed copper powder developed by the present invention has a simple structure, is used for the production of wear-resistant bearings for the first time, has low cost, will not affect the entire production line, is simple to operate, reduces labor load, and is suitable for industrial application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of a device for bearing wear-resistant mixed copper powder in Example 1.

[0016] Figure 2 It is a schematic diagram of the stirring blade structure of the second embodiment.

[0017] Wherein: dispersion tank 1, heating device 2, liquid adder 3, transmission pipe 4, storage box 5, nozzle 6, pulser 7, stirrer 8, powder feed port 9, liquid feed port 10, solenoid valve 11, liquid storage tank 12, flow valve 13, liquid outlet pipe 14, powder feed port cover 15, liquid feed port cover 16, stirring rod 81, stirring blade 82, hole 83. DETAILED DESCRIPTION

[0018] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Embodiment 1

[0019] See attached Figure 1A device for bearing wear-resistant mixed copper powder, comprising a dispersion tank body 1, a heating device 2, a liquid adder 3, a transmission pipe 4, a storage box 5, a nozzle 6, and a pulser 7; the liquid storage tank is located above the reaction tank body, and the storage box is located below the reaction tank body; the heating device is a flexible heating plate, which is located at the lower part of the outer wall of the dispersion tank body; an agitator 8 (the speed is adjustable between 8000 and 9000 rpm, with a shearing effect) is arranged inside the dispersion tank body, a powder feed port 9 and a liquid feed port 10 are arranged on the top, and an electromagnetic valve 11 is arranged at the bottom; the transmission pipe connects the electromagnetic valve and the storage box; the pulser is located at the top of the storage box, and the nozzle is located at the bottom of the storage box; the liquid adder comprises a liquid storage tank 12; a flow valve 13 is connected to the bottom of the liquid storage tank; the flow valve is connected to a liquid outlet pipe 14; the powder feed The powder feed inlet and liquid feed inlet are respectively provided with a powder feed inlet cover 15 and a liquid feed inlet cover 16; the liquid outlet pipe is inserted into the liquid feed inlet cover and is located in the liquid feed inlet; the liquid storage tank is provided with an auxiliary agent inlet 17 and a low-boiling point solvent inlet 18, and the outer side wall of the liquid storage tank is provided with a heating and heat-insulating layer 19; the liquid storage tank is provided with an air suction hood 20; the air suction hood is connected with the solvent recovery tank 22 through an air pipe 21, and the side wall of the solvent recovery tank is provided with a gas inlet 23, a liquid outlet 24, and a supplementary solvent inlet 25, and a porous separation plate 26 is provided inside; the liquid outlet is connected with the low-boiling point solvent inlet through a liquid suction pump 27, the auxiliary agent inlet is provided with an auxiliary agent inlet cover 28, and the supplementary solvent inlet is provided with a supplementary solvent inlet cover 29; the specific installation of the heating and heat-insulating layer, the air suction hood and the porous separation plate is conventional technology. Embodiment 2

[0020] On the basis of the first embodiment, the stirrer comprises a stirring rod 81 and a stirring blade 82; the stirring blade is a spiral structure; the stirring blade is provided with a plurality of holes 83; the hole diameter is 1 to 1.5 mm, and the stirring blade structure is shown in the attached Figure 2 .

[0021] The components involved in the present invention are all existing products, and the same components in the attached drawings are marked at one place; in actual production, copper powder is put into the dispersion tank from the powder feed port, and the powder feed port cover and the liquid feed port cover are covered; various additives are added to the liquid storage tank through the additive inlet, and the liquid outlet pipe is inserted into the liquid feed port cover according to the conventional method, and the port is located in the liquid feed port. Under the action of a low boiling point solvent (boiling point less than 50°C), each additive is evenly dispersed, and may or may not be stirred, and the dissolution is uniform, and then heating and suction are turned on to remove most of the solvent, and the solvent sucked out by the suction hood enters the solvent recovery tank through the gas inlet and is sucked through the porous separation plate A small amount of additives is added, and the obtained solvent is injected into the liquid storage tank again by the liquid extraction pump for recycling. When it is insufficient, it is added through the supplementary solvent inlet; additives are added through the flow valve in chronological order; when the first batch of additives is added, stirring is turned on, and the initial dispersion of the additives can be achieved through high-speed shearing. When the second batch of additives is added, heating is turned on to reduce the viscosity of the system and help the dispersion of copper powder and additives. At the same time, heating can accelerate the chemical reaction related to the additives, shorten the reaction time, and improve the stability of the reaction; after dispersion, the dispersed copper powder is input into the storage box through the solenoid valve, and the pulser is turned on. Under the impact of pulse gas, the copper powder is sprayed onto the base plate through the nozzle. The effect test is mainly characterized by the hardness (HB) of each part of the sintered plate. The hardnesses of the four corners and the center of the plate prepared in Example 1 are 80, 81, 80, 81, and 80 respectively; the hardnesses of the four corners and the center of the plate prepared in Example 2 are 80, 80, 80, 80, 80, and the circulating solvent performance is consistent; on the basis of Example 1, if no heating device is set, the hardnesses of the four corners and the center of the prepared plate are 80, 80, 82, 81, and 81 respectively; on the basis of Example 1, if no low-boiling point solvent inlet, heating and insulation layer, and solvent recovery are set, the hardnesses of the four corners and the center of the prepared plate are 81, 80, 82, 80, and 81 respectively; if the existing method is adopted, the hardnesses of the four corners and the center of the prepared plate are 78, 80, 82, 83, and 81 respectively.

Claims

1. Application of a device for bearing wear-resistant mixed copper powder in the dispersion of bearing wear-resistant mixed copper powder, characterized in that: The device for bearing wear-resistant mixed copper powder includes a dispersion tank, a heating device, a liquid adder, a transmission pipe, a storage box, a nozzle, and a pulser; the heating device is located on the outer wall of the dispersion tank; an agitator is provided inside the dispersion tank, a powder feed port and a liquid feed port are provided on the top, and an electromagnetic valve is provided at the bottom; the transmission pipe connects the electromagnetic valve and the storage box; the pulser is located at the top of the storage box, and the nozzle is located at the bottom of the storage box; the liquid adder includes a liquid storage tank; a flow valve is connected to the bottom of the liquid storage tank; the flow valve is connected to a liquid outlet pipe; the liquid outlet pipe is located in the liquid feed port; the liquid storage tank is provided with an auxiliary The outer wall of the liquid storage tank is provided with a heating and heat-insulating layer; the liquid storage tank is provided with an air suction hood; the air suction hood is connected with the solvent recovery tank through an air pipe; the side wall of the solvent recovery tank is provided with a gas inlet, a liquid outlet, and a supplementary solvent inlet, and a porous separation plate is provided inside; the liquid outlet is connected with the low-boiling-point solvent inlet through a liquid pump; the agitator includes a stirring rod and a stirring blade; the stirring blade is a spiral structure; the stirring blade is provided with a plurality of holes; the aperture of the hole is 1 to 1.5 mm; the liquid storage tank is located above the reaction tank body; the storage box is located at the reaction tank body The bottom of the tank body; the additive inlet is provided with an additive inlet cover; the supplementary solvent inlet is provided with a supplementary solvent inlet cover; the powder feed port and the liquid feed port are provided with a powder feed port cover and a liquid feed port cover respectively; the application comprises the following steps: copper powder is put into the dispersion tank body from the powder feed port, and the powder feed port cover and the liquid feed port cover are covered; various additives are added to the liquid storage tank through the additive inlet respectively, the liquid outlet pipe is inserted into the liquid feed port cover, and the port is located in the liquid feed port. Under the action of the low boiling point solvent, the additives are evenly dispersed, stirred or not stirred, and dissolved evenly, and then the heating and suction are turned on. Most of the solvent is removed, and the solvent sucked out by the suction hood enters the solvent recovery tank through the gas inlet, and a small amount of additives is adsorbed through the porous separation plate. The obtained solvent is injected into the liquid storage tank again by the liquid extraction pump for recycling. When the solvent is insufficient, it is added through the supplementary solvent inlet; additives are added through the flow valve in chronological order; when the first batch of additives is added, stirring is turned on, and the initial dispersion of the additives is achieved through high-speed shearing. When the second batch of additives is added, heating is turned on to reduce the viscosity of the system; after dispersion, the dispersed copper powder is input into the storage box through the solenoid valve, and the pulser is turned on. Under the impact of pulse gas, the copper powder is sprayed onto the bottom plate through the nozzle.

2. The use according to claim 1, characterized in that: The heating device is located at the lower part of the outer side wall of the dispersion tank body.

Images