CN-122014700-A - Ultrahigh-voltage-stabilizing adjusting system for gear press-fitting process and control method

CN122014700ACN 122014700 ACN122014700 ACN 122014700ACN-122014700-A

Abstract

The invention discloses an ultrahigh pressure stable pressure regulating system and a control method for a gear press mounting process, wherein the ultrahigh pressure stable pressure regulating system comprises a motor, an ultrahigh pressure plunger pump, a pressure regulating valve, a first one-way valve, a stable pressure damping block, a second one-way valve, a first pressure sensor, a second pressure sensor and an unloading valve, wherein the flow rate in the ultrahigh pressure system is smaller, the displacement opening degree of the pressure regulating valve is extremely small, pressure fluctuation easily occurs, a gear tensioning tool can realize linear loading and pressure relief within the range of 0-200MPa, oil liquid is pressurized to the tensioning tool through the first one-way valve during pressurization regulation, the first one-way valve can inhibit pressure fluctuation in the tool, the pressure in the tool is reduced through the stable pressure damping block during depressurization regulation, the damping effect can reduce the working pressure fluctuation, the pressure feedback pressure is in place through the two groups of pressure sensors, the depressurization process can be slow after the pressure difference between the pressure in the tool and the pump outlet pressure is larger than the opening pressure of the second one-way valve, and the pressure in the tool can maintain good linearity during depressurization process.

Inventors

ZHANG WENXUE
WANG CHENGZHEN
HAN RUI
Pan Shuangying

Assignees

杭州雷恩液压设备制造有限公司

Dates

Publication Date: 20260512
Application Date: 20260409

Claims (7)

1. The ultrahigh pressure stable pressure regulating system for the gear press-fitting process is characterized by comprising a motor, an ultrahigh pressure plunger pump, a pressure regulating valve, a first one-way valve, a stable pressure damping block, a second one-way valve, a first pressure sensor, a second pressure sensor and an unloading valve; The motor drives the ultrahigh-pressure plunger pump to rotate and discharges hydraulic oil; The inlet of the pressure regulating valve is communicated with the outlet of the ultrahigh pressure plunger pump, the outlet of the pressure regulating valve is connected with the oil tank, the pressure regulating valve is an electric proportion pressure regulating valve or a hydraulic proportion pressure regulating valve, and the set pressure can be linearly regulated according to a current signal or hydraulic pressure; The first pressure sensor is connected to the outlet oil path of the ultrahigh pressure plunger pump and is used for feeding back the inlet pressure of the pressure regulating valve; The positive oil port of the first one-way valve is connected with the outlet of the ultra-high pressure plunger pump, the reverse oil port of the first one-way valve is connected with the oil inlet of the tensioning tool, and the positive opening pressure is less than 1bar; an oil port at one end of the pressure stabilizing damping block is connected with the outlet of the ultrahigh pressure plunger pump, an oil port at the other end of the pressure stabilizing damping block is connected with an oil inlet of the tensioning tool, and the pressure stabilizing damping block is formed by connecting a plurality of threaded damping holes in series; The reverse oil port of the second one-way valve is connected with the outlet of the ultrahigh pressure plunger pump, the forward oil port of the second one-way valve is connected with the oil inlet of the tensioning tool, the forward opening pressure is greater than 10Mpa, and the opening pressure can be set through the pre-tightening force of a spring; The second pressure sensor is connected to an oil inlet loop of the tensioning tool and is used for feeding back the oil pressure in the tensioning tool; One port of the unloading valve is connected with an oil inlet of the tensioning tool, the other port of the unloading valve is connected with an oil tank, the unloading valve is a two-position two-way ultrahigh-pressure electromagnetic stop valve, and the two ports are cut off under the condition of power failure.
2. The ultra-high pressure voltage stabilizing and regulating system for the gear press-fitting process according to claim 1, wherein the forward opening pressure of the second one-way valve is required to be set to be larger than the pressure fluctuation amplitude of the pressure regulating valve, and the expanding and compressing pressure control method and the voltage stabilizing process in the gear press-fitting process comprise three working conditions of expanding and compressing, expanding and compressing.
3. The ultra-high pressure stable pressure regulating system for the gear press-fitting process according to claim 2, wherein in the process of tensioning and pressurizing, the pump outlet pressure is pressurized according to a certain slope by regulating the current or the external control pressure of the pressure regulating valve, when the pressure fluctuation of the pressure regulating valve is increased, if the inlet pressure of the pressure regulating valve is larger than the pressure in a tensioning tool, the pump outlet pressure is transmitted into the tensioning tool through the first one-way valve, the pressure in the tool is increased along with the set pressure of the pressure regulating valve, when the pressure fluctuation value of the pressure regulating valve is smaller than the pressure in the tensioning tool, the pressure reduction amplitude is far smaller than the fluctuation amplitude of the pressure regulating valve due to the fact that the damping hole in the pressure stabilizing damping block is very small and the throttling effect is very strong, and in the process of tensioning and pressurizing, whether the tensioning and pressurizing force reaches the set pressure is judged through the feedback value of the second pressure sensor.
4. The ultra-high pressure steady pressure regulating system for a gear press mounting process according to claim 2, wherein in the process of maintaining the pressure of the expansion and compression pump, when the pressure of the pressure regulating valve is set to a fixed value and the pressure of the pump outlet fluctuates, when the pressure fluctuates upwards, the pressure of the pump outlet is quickly transferred into the expansion and compression tool through the first one-way valve, and when the pressure of the pressure regulating valve fluctuates downwards, the pressure of the tool is quickly increased, the first one-way valve isolates the pressure of the expansion and compression from the pressure of the pump outlet reversely, the oil in the expansion and compression tool is conducted with the oil of the pump outlet through a damping hole of the pressure stabilizing damping block, and because the damping hole is very small and the throttling effect is very strong, the pressure of the expansion and compression pump slowly decreases to the value of the pressure of the pump outlet, and the pressure reduction amplitude of the pressure is far smaller than the fluctuation downwards of the pressure regulating valve, so that the pressure in the expansion and compression tool fluctuates slightly around the peak pressure of the pressure fluctuation of the pressure regulating valve, thereby playing the role of stabilizing the pressure of the compression and compression.
5. The ultra-high pressure steady voltage regulating system for a gear press mounting process according to claim 2, wherein in the process of tensioning and depressurizing, the pump outlet pressure is depressurized according to a certain gradient by regulating the current or the external control pressure of the pressure regulating valve, the first one-way valve reversely isolates the tensioning pressure from the pump outlet pressure, the oil in the tensioning tool is conducted with the pump outlet oil through the damping hole of the steady voltage damping block, the depressurizing fluctuation amplitude in the tool is smaller than the fluctuation amplitude of the pump outlet pressure, the tool pressure is reduced and lags behind the pump outlet pressure, the more the internal thread damping of the steady voltage module is, the smaller the damping hole is, the longer the pressure lag time is, whether the tensioning pressure reaches the set pressure or not is judged through the feedback value of the first pressure sensor in the process of tensioning and depressurizing, and after the pump outlet pressure reaches the set value, the current or the external control pressure of the pressure regulating valve is kept, and the pressure in the tensioning tool is waited for the pressure to be reduced to the set value.
6. The ultra-high pressure voltage stabilizing and regulating system for the gear press-fitting process according to claim 1, wherein when a damping hole in the voltage stabilizing damping block is blocked to cause that an orifice is too small or is completely disconnected, the tension and compression process and the tension and compression force maintaining process are basically not affected, the lag time of pressure reduction in a tension tool in the tension and decompression process can be prolonged, the tension tool cannot complete the tension and decompression process after the damping block is completely blocked, and the tension and compression force decompression and the pressure stabilization effect can be realized through the second one-way valve.
7. The ultra-high pressure stabilizing and regulating system for the gear press-fitting process according to claim 6, wherein when the pressure regulating valve is regulated to reduce pressure, after the difference between the pump outlet pressure value and the pressure value in the tensioning tool is larger than the set opening pressure of the second one-way valve, the oil in the tensioning tool is conducted to the pump outlet (the inlet of the pressure regulating valve) through the second one-way valve to be decompressed, when the pressure regulating valve pressure fluctuates upwards, the difference between the pump outlet pressure and the pressure in the tensioning tool is smaller than the second one-way valve opening pressure, the pressure in the tensioning cavity is kept unchanged, the pressure in the tensioning cavity can be effectively stabilized, and when the pressure value fed back by the first sensor reaches the set tensioning cavity pressure, the tensioning cavity pressure detected by the second pressure sensor can be larger than the first pressure sensor value (the difference is the second one-way valve opening pressure), so that the final pressure of the pressure regulating valve is set to be lower than the final pressure in the required tensioning tool (the difference is the second one-way valve opening pressure) during tensioning and decompression control is required, and whether the feedback pressure of the second tensioning cavity reaches the set pressure or not is judged through the second tensioning pressure value; when the pressure of the pressure regulating valve is reduced to zero, the inside of the tensioning tool can still be locked to be a certain pressure by the second one-way valve, and the tensioning pressure can be completely relieved by the electricity of the unloading valve.

Description

Ultrahigh-voltage-stabilizing adjusting system for gear press-fitting process and control method Technical Field The invention relates to the field of ultrahigh-pressure hydraulic transmission, in particular to an ultrahigh-pressure voltage stabilizing and regulating system for a gear press-fitting process and a control method. Background In the gear press-fitting process, the ultra-high pressure hydraulic oil is required to enter the tensioning tool, so that the tensioning tool is expanded or decompressed. In order to ensure the control precision in the press mounting process, the pressure value and the pressure relief value of the tensioning tool can be regulated and controlled, and the pressure change time is required. The pressure of the ultra-high pressure system can be controlled through the pressure regulating valve, but the maximum pressure in the tensioning tool can reach 200MPa, the ultra-high pressure flow is smaller, the valve core displacement opening of the pressure regulating valve is smaller, the pressure is regulated to be easy to fluctuate, the pressure fluctuation in the tensioning tool is larger, and the press-fitting effect is affected. Disclosure of Invention Aiming at the defects of the prior art, the invention provides an ultrahigh pressure voltage stabilizing and regulating system and a control method for a gear press-fitting process, which can realize the linear adjustable pressurization/depressurization of the pressure in a tensioning tool of the gear press-fitting process within the range of 0-200MPa and effectively stabilize the pressure of a tensioning cavity. The aim of the invention is achieved by the following technical scheme: the ultrahigh pressure voltage stabilizing and regulating system for the gear press-fitting process comprises a motor, an ultrahigh pressure plunger pump, a pressure regulating valve, a first one-way valve, a voltage stabilizing damping block, a second one-way valve, a first pressure sensor, a second pressure sensor and an unloading valve; The motor drives the ultrahigh-pressure plunger pump to rotate and discharges hydraulic oil; The inlet of the pressure regulating valve is communicated with the outlet of the ultrahigh pressure plunger pump, and the outlet of the pressure regulating valve is connected with the oil tank; The first pressure sensor is connected to the outlet oil path of the ultrahigh pressure plunger pump and is used for feeding back the inlet pressure of the pressure regulating valve; The positive oil port of the first one-way valve is connected with the outlet of the ultra-high pressure plunger pump, the reverse oil port of the first one-way valve is connected with the oil inlet of the tensioning tool, and the positive opening pressure is less than 1bar; an oil port at one end of the pressure stabilizing damping block is connected with an outlet of the ultrahigh pressure plunger pump, and an oil port at the other end of the pressure stabilizing damping block is connected with an oil inlet of the tensioning tool; The reverse oil port of the second one-way valve is connected with the outlet of the ultrahigh pressure plunger pump, the forward oil port of the second one-way valve is connected with the oil inlet of the tensioning tool, the forward opening pressure is greater than 10Mpa, and the opening pressure can be set through the pre-tightening force of a spring; The second pressure sensor is connected to an oil inlet loop of the tensioning tool and used for feeding back the oil pressure in the tensioning tool. One port of the unloading valve is connected with an oil inlet of the tensioning tool, and the other port of the unloading valve is connected with an oil tank. Further, the pressure regulating valve is an electric proportion pressure regulating valve or a hydraulic proportion pressure regulating valve, and the set pressure can be linearly regulated according to a current signal or hydraulic pressure. Further, the pressure stabilizing damping block is formed by connecting a plurality of threaded damping holes in series. Further, the unloading valve is a two-position two-way ultrahigh-pressure electromagnetic stop valve, and two ports are cut off under the condition of power failure. Further, the ultrahigh-pressure plunger pump is a radial plunger pump, and the highest output pressure is greater than 200Mpa. The control method of the ultrahigh pressure voltage stabilizing and regulating system for the gear press-fitting process comprises the following specific working conditions of tension and compression, tension and pressure maintenance and tension and pressure reduction, wherein the forward opening pressure of the second one-way valve is required to be set to be larger than the pressure fluctuation amplitude of the pressure regulating valve: And in the tensioning and pressurizing process, the pump outlet pressure is pressurized according to a certain slope by adjusting the current or the external control pressure of the pressu