CN-224229013-U - Hydraulic driving system of air compressor

Abstract

The utility model discloses a hydraulic driving system of an air compressor, which comprises a hydraulic motor, an electromagnetic reversing valve A, an electromagnetic reversing valve B, an electromagnetic overflow valve, an oil inlet P and an oil return port T, wherein the electromagnetic reversing valve A and the electromagnetic reversing valve B are connected in parallel between the oil inlet P and the oil inlet of the hydraulic motor, and the electromagnetic overflow valve is arranged between the oil inlet P and the oil outlet T.

Inventors

• FENG LEI
• ZOU JIDE
• GAO SHENGCHAO
• WANG XIQI

Assignees

• 威海广泰空港设备股份有限公司

Dates

Publication Date

20260512

Application Date

20250530

Claims (8)

1. 1. The hydraulic driving system of the air compressor is characterized by comprising a hydraulic motor, an electromagnetic reversing valve A, an electromagnetic reversing valve B, an electromagnetic overflow valve, an oil inlet P and an oil return port T, wherein the electromagnetic reversing valve A and the electromagnetic reversing valve B are connected in parallel between the oil inlet P and the oil inlet of the hydraulic motor, and the electromagnetic overflow valve is arranged between the oil inlet P and the oil outlet T.
2. 2. The hydraulic driving system of the air compressor according to claim 1, wherein a main valve oil inlet of the electromagnetic overflow valve is connected with an oil inlet P, a main valve oil return port is connected with an oil return port T, and a built-in electromagnetic valve controls on-off of a pilot oil path.
3. 3. The hydraulic driving system of the air compressor according to claim 1 or 2, wherein a one-way throttle valve A is connected between an oil outlet of the electromagnetic directional valve A and an oil inlet of the hydraulic motor; a one-way throttle valve B is connected between an oil outlet of the electromagnetic directional valve B and an oil inlet of the hydraulic motor.
4. 4. The hydraulic driving system of the air compressor according to claim 1 or 2, wherein the electromagnetic directional valve A and the electromagnetic directional valve B are driven by output voltage signals of a loading electromagnetic valve and an unloading electromagnetic valve of the air compressor, and the loading electromagnetic valve and the unloading electromagnetic valve are powered by a power module of the air compressor.
5. 5. The hydraulic driving system of the air compressor according to claim 1 or 2, wherein a heat dissipation fan is further arranged, and the heat dissipation fan is powered by the power module; The heat radiation fan is connected with the starting switch in series and then connected with the temperature control switch in parallel.
6. 6. The hydraulic drive system of an air compressor according to claim 1 or 2, further comprising a pressure switch, wherein the pressure switch detects the pressure of a main oil passage of the hydraulic system and sends a signal to the controller.
7. 7. The hydraulic driving system of air compressor according to claim 1 or 2, wherein the output shaft of the hydraulic motor is connected with a driving pulley, the driving pulley is connected with a driven pulley through a belt, and the driven pulley is connected with a screw host of the air compressor.
8. 8. The hydraulic driving system of the air compressor as set forth in claim 7, wherein the output shaft of the hydraulic motor is sleeved with an expansion sleeve, and the driving belt pulley is connected with the output shaft of the hydraulic motor through the expansion sleeve.

Description

Hydraulic driving system of air compressor Technical Field The utility model relates to the technical field of air compressor driving, in particular to a hydraulic driving system of an air compressor. Background The air compressor is a common air source of an air circuit system, most of the current industrial air compressors are driven by motors, but because the air in a plateau area is thin, the heat dissipation effect of the motors is poor, the air compressor can only be used under certain altitude conditions, and a plurality of use scenes do not have the power supply condition of high-voltage alternating current, so that the use limitation is large. The existing air compressors driven by the hydraulic motors are also provided, but the existing hydraulic motors are usually regulated by adopting fixed flow or mechanical throttle valves, so that accurate flow grading control is difficult to realize, the rotating speed regulating range of the air compressors is limited, different working condition requirements cannot be flexibly matched, the quick unloading function is lacking, hydraulic impact is large when the motors are started or stopped, and the service life of transmission parts of the air compressors is influenced. Disclosure of utility model The utility model aims to solve the defects of the prior art and provides the hydraulic driving system of the air compressor, which has the advantages of simple structure, precise flow hierarchical control, dynamic unloading and pressure building optimization and strong adaptability. The technical scheme adopted for solving the technical problems is as follows: The hydraulic driving system of the air compressor is characterized by comprising a hydraulic motor, an electromagnetic reversing valve A, an electromagnetic reversing valve B, an electromagnetic overflow valve, an oil inlet P and an oil return port T, wherein the electromagnetic reversing valve A and the electromagnetic reversing valve B are connected in parallel between the oil inlet P and the oil inlet of the hydraulic motor, and the electromagnetic overflow valve is arranged between the oil inlet P and the oil outlet T; unloading and pressure building are carried out through the electromagnetic overflow valve, energy is saved, consumption is reduced, system reliability is improved, the electromagnetic reversing valve A and the electromagnetic reversing valve B can be opened singly or in combination, and the adjustment of the large flow and the small flow is realized in a matched mode, so that the high-speed and low-speed operation of the hydraulic motor is realized. According to the electromagnetic overflow valve, the main valve oil inlet is connected with the oil inlet P, the main valve oil return port is connected with the oil return port T, the built-in electromagnetic valve controls the on-off of a pilot oil way, and unloading and pressure building are realized. A one-way throttle valve A is connected between an oil outlet of an electromagnetic reversing valve A and an oil inlet of a hydraulic motor; A one-way throttle valve B is connected between an oil outlet of the electromagnetic directional valve B and an oil inlet of the hydraulic motor; and the control of the one-way throttle valve A and the one-way throttle valve B realizes flow control and motion buffering. The electromagnetic directional valve A and the electromagnetic directional valve B are driven by voltage signals output by the loading electromagnetic valve and the unloading electromagnetic valve of the air compressor, and the loading electromagnetic valve and the unloading electromagnetic valve are powered by the power supply module of the air compressor, so that gas-liquid linkage control is realized. The utility model is also provided with a heat radiation fan, and the heat radiation fan is powered by the power supply module; The heat dissipation fan is connected with the starting switch in series and then connected with the temperature control switch in parallel, the starting switch controls the start and stop of the heat dissipation fan in a manual mode, and the temperature control switch controls the start and stop of the heat dissipation fan in an automatic mode so as to realize heat dissipation of the air compressor. The utility model is also provided with a pressure switch, the pressure switch detects the pressure of the main oil way of the hydraulic system and sends a signal to the controller, the pressure switch can monitor the pressure of the main oil way of the hydraulic system, and when the pressure is abnormal, the controller can control the air compressor to start and stop. The output shaft of the hydraulic motor is connected with the driving belt pulley, the driving belt pulley is connected with the driven belt pulley through the belt, the driven belt pulley is connected with the screw host of the air compressor, and the screw host is driven to rotate through rotation of the output shaft of the hydraulic motor, so tha