1. Domestic and overseas orbit motor Progress status
Cycloid hydraulic motor It is small in size, adjustable in rotating speed range, reliable in application and affordable Low speed high torque hydraulic motor This is also called "Orbitmotor" overseas. cycloid Hydraulic motor It is widely used in various construction machinery and military machinery. The concept of cycloidal hydraulic motor was first proposed by American char lynn company. After several years of discussion and research and development, it was put into production and processing and applied to actual machinery and equipment in 1960. With the continuous progress of hydraulic technology and modern mechanical equipment manufacturing technology, many new Hydraulic cycloid motor Machine equipment and new design.
Application of cycloidal hydraulic motor Planetary reducer The basic principle of the structure (one tooth difference, less tooth difference) has made rapid progress with its unique advantages. These advantages are fully reflected in: simple structure, small size, light weight, large output torque, unit mass power far higher than other types of hydraulic motors, and wide rotating speed range, reliable application, good low-speed stability, affordable price, widely used in plastic machinery and equipment, engineering machinery and equipment, agricultural machinery, mining equipment, lifting and conveying machinery Fishery and aquaculture machinery equipment and modular machine tools and other machinery and equipment. At present, Eaton and Ross produce and process cycloidal motors in the United States; Denmark has Danfoss; Japan has Uchida Oil Pressure Machine Manufacturing Co., Ltd. Table 1.1 shows the performance parameters of such machines and equipment produced and processed by some famous cycloidal motor manufacturers. In China, cycloidal motors are divided into axial flow distribution type (BM1, BM2 and BM3) and end flow distribution type (BM-C, BM-D, BM-E and BM-F).
The manufacturing level of cycloidal motors at home and abroad, whether in processing technology or process level, has a large distance, which is mainly shown in the following aspects:
(1) In terms of the production mode of cycloidal gears, foreign countries adopt the forming cutting method, and the tooth profile deviation can be less than
30 m, surface roughness can be less than 0.2 m; In China, the cycloidal precision tool grinder is adopted, the tooth profile deviation is not more than 100 m, and the surface roughness is only 0.4! "So the specific contact pressure of the gear will be very large, which seriously affects the increase of the pressure difference of the cycloidal motor, and also affects the working efficiency of the cycloidal motor.
(2) In terms of the production mode of stator, foreign countries adopt the broaching process, while the studded stator adopts
The broach is very complicated, so it must be made into a combined type. After broaching and forming, the stator adopts the internal cavity strong shaping cutting method, which will improve the production efficiency, and the specifications of the parts have high precision
Most of the domestic stator production adopts the processing technology of punching, boring, bullet hole and tooth root circle cutting, which can not be compared with the foreign production level in terms of surface roughness or position tolerance. (3) Most of the port plates in foreign countries are made of powder metallurgy materials, with little machining and distribution
The specification of the window is very accurate, no later machining is needed, and the manufacturing cost is low.
In China, most of the port plates are manufactured by machining, so the manufacturing cost required to obtain higher specification precision is much higher than that of foreign countries.
