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Hydraulic motor provided with friction pair with nanometer graphite layer and method for processing nanometer graphite layer

A nano-graphite, hydraulic motor technology, applied in the direction of liquid variable capacity machinery, reciprocating piston engine, variable capacity engine, etc., can solve the low speed performance and poor starting performance of the motor, the reliability and life problems are difficult to solve, and the hydraulic motor The problems of large volume and weight can improve the bearing capacity and mechanical efficiency, reduce the friction coefficient, and reduce the production cost.

Inactive Publication Date: 2012-03-07
KUNSHAN JINFA HYDRAULIC MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the bottom of the sliding shoe is coated with wear-resistant materials such as Babbitt alloy, due to the high specific pressure, the friction and wear are still serious, the mechanical efficiency is low, the low-speed performance and starting performance of the motor are poor, and even gluing failure occurs, which limits the pressure and speed of the motor. further improvement of
The Italians changed this friction pair into a rolling bearing, which made the structure more complex, and resulted in a larger volume and weight of the hydraulic motor, high manufacturing costs, and when the displacement of the motor is large, its working reliability and The problem of longevity is difficult to solve

Method used

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  • Hydraulic motor provided with friction pair with nanometer graphite layer and method for processing nanometer graphite layer
  • Hydraulic motor provided with friction pair with nanometer graphite layer and method for processing nanometer graphite layer
  • Hydraulic motor provided with friction pair with nanometer graphite layer and method for processing nanometer graphite layer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] This embodiment is to process the nano-graphite layer on the outer surface of the plunger.

[0033] 1. Paint

[0034] Coat the parts of the plunger and the connecting rod that do not need to be plated with nano-graphite layer with epoxy resin paint and let it dry.

[0035] 2. Degreasing

[0036] Prepare by adding 22g of sodium hydroxide, 27g of sodium carbonate and 27g of trisodium phosphate per liter of water, and stir evenly to form a degreasing liquid. Heat the degreasing solution to 60°C, put the plunger into the degreasing solution, and soak for 15 minutes;

[0037] 3. Washing

[0038] Remove the plunger from the degreasing solution and rinse with running tap water.

[0039] 4. Activation

[0040] Prepare by adding 60g of zinc dihydrogen phosphate, 60g of zinc nitrate and 3g of sodium fluoride per liter of water, and stir evenly to form a derusting activation solution. The plunger after rinsing is soaked in the derusting activation solution under normal tempe...

Embodiment 2

[0047] In this embodiment, the nano-graphite layer is processed on the spherical surface of the ball head at one end of the connecting rod and the concave arc surface of the sliding shoe at the other end.

[0048] 1. Paint

[0049] Coat the surface of the part of the connecting rod that does not need to be plated with nano-graphite, and let it dry.

[0050] 2. Degreasing

[0051] Prepare by adding 25g of sodium hydroxide, 30g of sodium carbonate and 30g of trisodium phosphate per liter of water, and stir evenly to form a degreasing night. Heat the degreasing material to 65°C, put the connecting rod into the degreasing material and soak for 12 minutes;

[0052] 3. Washing

[0053] Take the connecting rod out of the degreasing room and rinse it with running tap water.

[0054] 4. Activation

[0055] Prepare by adding 75g of zinc dihydrogen phosphate, 80g of zinc nitrate and 4g of sodium fluoride per liter of water, and stir evenly to form a derusting activation solution. P...

Embodiment 3

[0062] In this embodiment, the nano-graphite layer is processed on the spherical surface of the ball head at one end of the connecting rod and the concave arc surface of the sliding shoe at the other end.

[0063] 1. Paint

[0064] Coat the surface of the part of the connecting rod that does not need to be plated with nano-graphite, and let it dry.

[0065] 2. Degreasing

[0066] Prepare by adding 28g of sodium hydroxide, 33g of sodium carbonate and 33g of trisodium phosphate per liter of water, and stir evenly to form a degreasing night. Heat the degreasing material to 70°C, put the connecting rod into the degreasing material and soak for 10 minutes;

[0067] 3. Washing

[0068] Take the connecting rod out of the degreasing room and rinse it with running tap water.

[0069] 4. Activation

[0070] According to the concentration of adding 90g zinc dihydrogen phosphate, 100g zinc nitrate and 6g sodium fluoride per liter of water to prepare, and stir evenly to form derusting...

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Abstract

The invention relates to a hydraulic motor provided with a friction pair with a nanometer graphite layer and a method for processing the nanometer graphite layer. The hydraulic motor comprises a casing body; a plurality of cylinder bodies are uniformly distributed on the casing body in the radial direction; each cylinder body is internally provided with a plunger piston to form a sliding connection with the casing body; a crankshaft is supported on the casing body and a bearing cover through a bearing; a crank of the crankshaft is uniformly articulated with connecting rods having the same number with cylinder bodies in the radial direction; one end of each connecting rod is articulated with the corresponding part of the crank, and the other end is articulated with a corresponding plunger piston; at least one friction surface of the friction pair formed by the flexible connection parts of the crankshaft and the connecting rods, the connecting rods and the plunger pistons, as well as the plunger pistons and the cylinder bodies is provided with the self-lubricating nanometer graphite layer. The method for processing the nanometer graphite layer comprises the following steps of: painting, surface degreasing, water scrubbing, activating for scouring, sensitizing, film removing and chemical depositing. The formed nanometer graphite layer has antifriction, friction-resistant, heat-resistant and self-lubricating performances, and the carrying capacity, the mechanical efficiency and the service life of the hydraulic motor are enhanced.

Description

technical field [0001] The invention relates to a hydraulic motor and a metal surface treatment method, in particular to a hydraulic motor with a nano graphite layer friction pair and a nano graphite layer processing method. Background technique [0002] The hydraulic horse is generally mainly composed of a crankshaft, a plunger, a connecting rod, a housing, a distribution housing, a distribution shaft and a bearing cover. From the 1960s and 1970s to the present, in the hydraulic motors produced at home and abroad, the housings with hydraulic flow passages are respectively fixed with the cylinder head, the bearing cap and the flow distribution housing. The plunger of this hydraulic motor is provided with a small hole, so that the plunger and the connecting rod ball joint pair communicate with the plunger cylinder hole to improve the lubrication and heat dissipation conditions. At the same time, the connecting rod is also provided with a small hole, and there is a The dampin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01B1/06F01B9/02F03C1/053F04B1/053
Inventor 徐荣滨徐祖悦
Owner KUNSHAN JINFA HYDRAULIC MACHINERY
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