Method and application for eliminating gaseous cavitation

A method and application for eliminating a gaseous cavitation where a noise, vibrations, gases, and a fluid degradation are present in a hydraulic steering system in heavy duty vehicles with a dual hydraulic steering gearbox, comprising the steps of:

• measuring and establishing a current operating conditions of the hydraulic steering system;
• a hydraulic fluid, a maximum RPM of a hydraulic pump (Max RPM Test (1)) and a maximum operating temperature of a fluid in the hydraulic system pump (Max Temp Test (1)),
• wherein the required functionality of the hydraulic system is established, a period of time that the hydraulic steering system is kept in operation for each test is predetermined and device for detecting gaseous cavitation during the tests are established, for which tests N, T and M are initiated, Max RPM Test (N), where the first N is equal to one (N=1), Max Temp Test (T), where the first T is equal to one (T=1), and Min RPM Test (M), where the first M is equal to one (M=1), and in which a depuration of the system is performed, draining in its entirety the hydraulic fluid and the system is supplied in its entirety with new fluid,
• wherein the system in operation is increased to its maximum RPM (Max RPM Test (N)) of the hydraulic pump;
• wherein it is validated that the fluid in the hydraulic system pump is at its maximum operating temperature (Max Temp Test (T)), where the hydraulic system is kept in operation for a predetermined period of time, where it is evaluated if there is presence of gaseous cavitation,
• wherein if the presence of gaseous cavitation is confirmed, the test is stopped, and a new N is determined, equal to N plus one (N=N+1), and a new maximum RPM of the hydraulic pump is determined (Max RPM Test (N));
• where the new maximum RPM will always be lower than the maximum operation of the previous test (Max RPM Test (N−1));
• to then proceed to the next test,
• where this test is repeated until there is no presence of gaseous cavitation, once it is established that the system operates permanently without gaseous cavitation and also detected that the development of the hydraulic system does not meet the required functionality, the test is stopped to evaluate the temperature and a new T is established, equal to T plus one (T=T+1);
• and a temperature reduction technique is selected, implemented and a new maximum operating temperature of the fluid in the hydraulic system pump is predetermined (Max Temp Test (T)),
• wherein the new maximum operating temperature of the fluid in the hydraulic system pump will always be lower than the maximum operation of the previous test (Max Temp Test (T−1)),
• where the hydraulic pump RPM test is restarted (Max RPM Test (N)), with N equal to one (N=1), where the tests are repeated;
• Max RPM Test (N) and Max Temp Test (T) until there is no presence of gaseous cavitation and the development of the hydraulic system meets the required functionality, by then and with the fulfillment of the previous step, the test is stopped and it is established that the development of the hydraulic system meets the required functionality and the hydraulic pump can operate in the hydraulic system permanently without gaseous cavitation with the established hydraulic fluid, with a maximum RPM (Max RPM Test (N)) and with a maximum operating temperature of the fluid in the hydraulic system pump (Max Temp Test (T)),
• determining the range of compliance of the development of the hydraulic system for the required functionality,
• wherein the test is called Min RPM Test (M), which begins with M equal to one (M=1), being Min RPM Test (1) equal to the Max RPM Test (N);
• wherein the system in operation is increased to its maximum RPM (Min RPM Test (M)) of the hydraulic pump, where it is validated that the fluid in the hydraulic system pump is at its maximum operating temperature (Max Temp Test (T)) and the hydraulic system is kept in operation for a predetermined period of time, so if it is confirmed that the evolution of the hydraulic system meets the required functionality, the test is stopped and a new M is established, equal to M plus one (M=M+1);
• and a new maximum RPM of the hydraulic pump is predetermined (Min RPM Test (M));
• where the new maximum RPM will always be lower than the maximum operation of the previous test (Min RPM Test (M−1)), where the test will be repeated until the development of the hydraulic system does not comply with the required functionality, where if it does not comply with the required functionality;
• the test is stopped and it is established that the development of the hydraulic system complies with the required functionality and the hydraulic pump operates in the hydraulic system permanently without gaseous cavitation with the established hydraulic fluid, in a maximum range of RPM (Max RPM Test (N)) and minimum RPM (Min RPM Test (M−1)) and with a maximum operating temperature of the fluid in the hydraulic system pump (Max Temp Test (T)),
• wherein based on the results obtained from the method, a maximum value of RPM of the pump in the hydraulic system is determined and the technical modifications are implemented in the pump to comply with the RPM, using the formulas of transmission of motion ratio, for which a reduction of the RPM is established in a ratio of 2 to a range of 0.5 to 1.9;
• wherein based on the results obtained from the method a new maximum value of fluid operating temperature in the hydraulic system pump is determined, then the selected temperature decrease technique is implemented.