Unlock instant, AI-driven research and patent intelligence for your innovation.

Method for machining abrasion resistance layer of bottom curved surface of connecting rod of hydraulic motor

The technology of a hydraulic motor and a processing method is applied in the processing field of the wear-resistant layer of the bottom arc surface of the connecting rod in the hydraulic motor, and can solve the problems of work reliability and life that cannot be solved, the low speed performance and starting performance of the motor, and the volume of the hydraulic motor. It can improve the efficiency of mechanical transmission, reduce material consumption and improve the bearing capacity.

Inactive Publication Date: 2013-03-06
KUNSHAN JINFA HYDRAULIC MACHINERY
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the specific pressure increases, the friction and wear are still serious, the mechanical efficiency is low, and the low-speed performance and starting performance of the motor are poor, and even glue failure occurs, which limits the further improvement of the motor pressure and speed.
In order to reduce the friction in the friction pair, the Italians changed the friction pair into a rolling bearing, which made the structure more complicated, and resulted in a larger volume and weight of the hydraulic motor, high manufacturing costs, and when the displacement of the motor is larger However, the reliability and lifespan problems of its work still cannot be solved

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for machining abrasion resistance layer of bottom curved surface of connecting rod of hydraulic motor
  • Method for machining abrasion resistance layer of bottom curved surface of connecting rod of hydraulic motor
  • Method for machining abrasion resistance layer of bottom curved surface of connecting rod of hydraulic motor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Prepare metallurgical powder raw materials according to the weight percentage of 75% copper, 15% tin and 10% lead, and put the prepared mixture into the mixer and mix evenly to form the mixture. Put the mixed metallurgical powder mixture into the above-mentioned rectangular annular cavity 3d of the forming mold, and press the metallurgical powder mixture in the cavity 3d through the upper die 1 to form a rectangular annular wear-resistant layer 2 , wear layer is 2.5mm, see image 3 , Figure 4 .

[0028] Then the connecting rod is treated, first remove the oxidized surface layer by pickling, use 15% dilute sulfuric acid solution, temperature 60°C, time 40 minutes; then use 8% NaOH solution or soda water for neutralization cleaning, neutralization cleaning time Leave on for 15 minutes, then rinse with warm water and blow dry. Then electrolytic copper plating is carried out to form a corresponding rectangular annular copper plating layer on the outermost circle of ...

Embodiment 2

[0032] Prepare metallurgical powder raw materials according to the weight percentage of 80% copper, 12% tin and 8% lead, and put the prepared mixture into the mixer and mix evenly to form the mixture. Put the mixed metallurgical powder mixture into the above-mentioned rectangular annular cavity 3d of the forming mold, and press the metallurgical powder mixture in the cavity 3d through the upper die 1 to form a rectangular annular wear-resistant layer 2 , wear layer is 2.0mm, see image 3 .

[0033] Next, the connecting rod is treated. First, remove the oxidized surface layer by pickling, use a dilute sulfuric acid solution with a concentration of 18% at a temperature of 50°C for 35 minutes; then use a NaOH solution with a concentration of 10% for neutralization and cleaning. The neutralization and cleaning time is Leave on for 18 minutes, then rinse with warm water and blow dry. Then electrolytic copper plating is carried out to form a corresponding rectangular annular c...

Embodiment 3

[0037] Prepare metallurgical powder raw materials according to the weight percentage of 85% copper, 5% tin and 10% lead, and put the prepared mixture into the mixer and mix evenly to form the mixture. Put the mixed metallurgical powder mixture into the above-mentioned rectangular annular cavity 3d of the forming mold, and press the metallurgical powder mixture in the cavity 3d through the upper die 1 to form a rectangular annular wear-resistant layer 2 , wear layer is 2.2mm, see image 3 .

[0038]Next, the connecting rod is treated. First, remove the oxidized surface layer by pickling, use a 20% dilute sulfuric acid solution at a temperature of 50°C for 30 minutes; then use a 12% NaOH solution for neutralization and cleaning. The neutralization and cleaning time is Leave on for 20 minutes, then rinse with warm water and blow dry. Then electrolytic copper plating is carried out to form a corresponding rectangular annular copper plating layer on the outermost circle of th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a method for machining an abrasion resistance layer of a bottom curved surface of a connecting rod of a hydraulic motor. The method comprises the following steps of: 1) preparing a powder metallurgy material; 2) pressing the abrasion resistance layer; 3) removing an oxidized surface layer from the connecting rod; 4) forming a copper-plated layer on the bottom curved surface of the connecting rod; 5) welding the abrasion resistance layer to a position corresponding to the bottom curved surface of the connecting rod; and 6) sintering the abrasion resistance layer onto the bottom curved surface of the connecting rod. The method has the advantages that: the formed abrasion resistance layer has high abrasion resistance, heat resistance, friction reduction and wearing resistance performance, so that the hydraulic motor can keep long-term high lubrication performance and abrasion resistance performance during high speed running and has higher working reliability and service life; meanwhile, working resistance is reduced, the mechanical transmission efficiency is high and the bearing capacity of the motor is high; furthermore, material consumption of the abrasion resistance layer is reduced and the production cost is saved; and pollution to the environment caused by adopting babbitt metals is avoided.

Description

technical field [0001] The invention relates to a friction surface treatment method for a friction pair in a hydraulic motor, in particular to a processing method for a wear-resistant layer on the bottom arc surface of a connecting rod in a hydraulic motor. Background technique [0002] Due to the high operating frequency of the crankshaft and connecting rod in the hydraulic motor, the friction pair formed between the two is easy to wear. For this reason, the bottom of the connecting rod sliding shoe is usually coated with wear-resistant materials such as Babbitt alloy, and the static pressure is formed. support. However, the specific pressure increases, the friction and wear are still serious, the mechanical efficiency is low, and the low-speed performance and start-up performance of the motor are poor, and even gluing failure occurs, which limits the further improvement of the motor pressure and speed. In order to reduce the friction in the friction pair, the Italians cha...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/04
Inventor 徐祖悦穆金才杨正州徐成瞿丁发徐荣滨
Owner KUNSHAN JINFA HYDRAULIC MACHINERY