CN115962168A - Hydraulic motor - Google Patents
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- CN115962168A CN115962168A CN202310003646.4A CN202310003646A CN115962168A CN 115962168 A CN115962168 A CN 115962168A CN 202310003646 A CN202310003646 A CN 202310003646A CN 115962168 A CN115962168 A CN 115962168A
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Abstract
A hydraulic motor, the hydraulic motor comprising: the plunger motor, the variable control valve, the servo valve, the stop valve and the safety valve; the high-pressure oil port of the hydraulic oil source is communicated with the plunger motor after passing through the stop valve, the first working port and the second working port of the variable control valve are communicated with the working port of the plunger motor, the third working port and the fourth working port of the variable control valve are communicated with the working port of the servo valve, the fifth working port of the variable control valve is communicated with the oil outlet of the stop valve, the sixth working port of the variable control valve is communicated with the low-pressure oil port of the hydraulic oil source, the oil outlet of the stop valve is communicated with the fifth working port of the variable control valve, and the unloading control oil port of the stop valve is communicated with the low-pressure oil port of the hydraulic oil source. The design can realize bidirectional variable control of the hydraulic motor through the proportional positions of the variable control valve and the servo valve, and can accurately perform stepless speed regulation on the plunger motor by changing the loading amplitude of the servo valve.
Description
Technical Field
The invention relates to a hydraulic actuating mechanism, belongs to the technical field of hydraulic components and particularly relates to a hydraulic motor.
Background
The deck crane for the offshore ship is one of important equipment of the ship, generally needs to perform lifting, amplitude variation, rotation and other actions, and a core execution element of the lifting and rotation mechanism is generally completed by a hydraulic motor.
In the use, the deck crane often can meet different operating modes, for example have and need adjust low-speed heavy load, high-speed light load and meticulous hoist and mount etc. in order to adapt to different operating modes, need control hydraulic motor's rotational speed, and traditional hydraulic motor only has single-speed or double speed, in order to satisfy user's accurate control speed demand, generally need dispose throttle valve, balanced valve etc. and carry out the speed governing to hydraulic motor, this kind of structural energy loss is great, and it is great to generate heat simultaneously.
Aiming at deck cranes with higher requirements on speed control, energy conservation and the like in the using process, a hydraulic motor which has high-precision control, bidirectional stepless speed regulation, high dynamic response and can realize energy storage and recovery is urgently needed.
The invention discloses a hydraulic motor speed regulating system, a speed regulating method and hoisting equipment, and belongs to the patent application number of 201310499591.7 and the application date of 2013.10.22. This hydraulic motor speed control system includes: a first hydraulic pump; a hydraulic motor including a descent port and an ascent port; the first reversing valve is connected between the hydraulic motor and the first hydraulic pump, the oil inlet is connected to the output end of the first hydraulic pump, the first working oil port is connected to the descending port of the hydraulic motor, and the second working oil port is connected to the ascending port of the hydraulic motor; the flow control valve is connected on a hydraulic pipeline between the first reversing valve and the hydraulic motor and used for controlling the hydraulic flow at the ascending port; the pressure control mechanism is connected to the control end of the flow control valve and is used for controlling the opening of the flow control valve; and a controller that acquires a hydraulic flow of the first directional valve. Although this design allows the opening of the flow control valve to be adjusted by the hydraulic flow control pressure control mechanism, it still has the following drawbacks:
the variable size of the hydraulic motor can be controlled only, and the variable direction of the hydraulic motor cannot be controlled, so that the hydraulic motor can realize bidirectional variable.
The information disclosed in this background section is only for enhancement of understanding of the general background of the application and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention aims to overcome the defects that the variable size and the variable direction of a hydraulic motor can only be controlled and the variable direction of the hydraulic motor cannot be controlled in the prior art, and provides a hydraulic motor capable of controlling the variable size and the variable direction of the hydraulic motor.
In order to achieve the above purpose, the technical solution of the invention is as follows:
a hydraulic motor, comprising: the plunger motor, the variable control valve, the servo valve, the stop valve and the safety valve; the low-pressure oil port of the plunger motor is communicated with the low-pressure oil port of a hydraulic oil source, the high-pressure oil port of the plunger motor is communicated with the working port of the stop valve, the first working port of the variable control valve is communicated with the first working port A of the plunger motor, the second working port of the variable control valve is communicated with the second working port B of the plunger motor, the third working port of the variable control valve is communicated with the first working port of the servo valve, the fourth working port of the variable control valve is communicated with the second working port of the servo valve, and the fifth working port of the variable control valve is communicated with the oil outlet of the stop valve, the sixth working port of the variable control valve is communicated with a low-pressure oil port of a hydraulic oil source, the oil inlet of the servo valve is communicated with a high-pressure oil port of the hydraulic oil source, the oil outlet of the servo valve is communicated with the low-pressure oil port of the hydraulic oil source, the oil inlet of the stop valve is communicated with the high-pressure oil port of the hydraulic oil source, the oil outlet of the stop valve is communicated with the fifth working port of the variable control valve, the unloading control oil port of the stop valve is communicated with the low-pressure oil port of the hydraulic oil source, the oil inlet of the safety valve is communicated with the high-pressure oil port of the plunger motor, and the oil unloading port of the safety valve is communicated with the low-pressure oil port of the hydraulic oil source.
The stop valve comprises an electromagnetic directional valve, a shuttle valve, a two-way cartridge valve and a proximity switch, the electromagnetic directional valve is a two-position three-way electromagnetic directional valve, an oil inlet of the shuttle valve is communicated with a high-pressure oil port of a hydraulic oil source, an oil outlet of the shuttle valve is communicated with an A port of a variable control valve, an oil inlet of the electromagnetic directional valve is communicated with an oil outlet of the shuttle valve, a working port of the electromagnetic directional valve is communicated with a spring cavity of the two-way cartridge valve, an oil drainage port of the electromagnetic directional valve is communicated with a low-pressure oil port of the hydraulic oil source, a spring cavity of the two-way cartridge valve is communicated with a low-pressure oil port of the hydraulic oil source, a springless cavity of the two-way cartridge valve is communicated with the high-pressure oil port of the hydraulic oil source, an oil drainage cavity of the two-way cartridge valve is communicated with an oil inlet of a plunger motor, a detection end of the proximity switch is in transmission fit with a valve core of the two-way cartridge valve, and the proximity switch is in signal connection with an external electric control system.
The plunger motor comprises a motor oil cylinder, a power output shaft, a swash plate and a variable oil cylinder, wherein an oil inlet of the motor oil cylinder is communicated with a springless cavity of the two-way cartridge valve, an oil outlet of the motor oil cylinder is communicated with a low-pressure oil port of a hydraulic oil source, the power output shaft of the motor oil cylinder is fixedly connected with a rotating center of the swash plate, the swash plate is in transmission fit with a piston rod of the variable oil cylinder, a first working port A of the variable oil cylinder is communicated with a first working port of the variable control valve, and a second working port B of the variable oil cylinder is communicated with a second working port of the variable control valve.
The variable control valve is a two-position six-way electromagnetic reversing valve, the variable control valve is in signal connection with an external electric control system, a first working port of the variable control valve is communicated with a first working port A of a variable oil cylinder, a second working port of the variable control valve is communicated with a second working port B of the variable oil cylinder, a third working port of the variable control valve is communicated with a first working port of a servo valve, a fourth working port of the variable control valve is communicated with a second working port of the servo valve, a fifth working port of the variable control valve is communicated with an oil outlet of a stop valve, a sixth working port of the variable control valve is communicated with a low-pressure oil port of a hydraulic oil source, and the servo valve is a four-way reversing valve with a displacement sensor.
The safety valve comprises a first safety valve group and a second safety valve group, and the first safety valve group and the second safety valve group are identical in structure.
The first safety valve bank comprises an electromagnetic directional valve, a first overflow valve, a second overflow valve and a two-way cartridge valve, wherein an oil inlet of the two-way cartridge valve is communicated with a high-pressure oil port of a plunger motor, an oil outlet of the two-way cartridge valve is communicated with an oil inlet of the second overflow valve, an oil drain port of the two-way cartridge valve is communicated with a low-pressure oil port of a hydraulic oil source, an oil outlet of the second overflow valve is communicated with a low-pressure oil port of the hydraulic oil source, an oil inlet of the electromagnetic directional valve is communicated with an oil outlet of the two-way cartridge valve, an oil outlet of the electromagnetic directional valve is communicated with a low-pressure oil port of the hydraulic oil source, a working port of the electromagnetic directional valve is communicated with an oil inlet of the first overflow valve, and an oil outlet of the first overflow valve is communicated with a low-pressure oil port of the hydraulic oil source.
The hydraulic motor further comprises an oil supplementing one-way valve, an oil inlet of the oil supplementing one-way valve is communicated with a low-pressure oil port of a hydraulic oil source, and an oil outlet of the oil supplementing one-way valve is communicated with a high-pressure oil port of the plunger motor.
The plunger motor further comprises a swing angle sensor, the detection end of the swing angle sensor is perpendicular to the telescopic rod of the plunger motor, a feeler lever of the swing angle sensor is in transmission fit with a piston rod of the variable oil cylinder, and the swing angle sensor is in signal connection with an external electric control system.
The plunger motor further comprises a rotating speed sensor, a power output shaft of the plunger motor is in transmission fit with a detection end of the rotating speed sensor, and the rotating speed sensor is in signal connection with an external electric control system.
The plunger motor further comprises two pressure measuring oil ports, and the two pressure measuring oil ports are respectively used for measuring the working pressure of the left cavity and the right cavity of the variable oil cylinder.
Compared with the prior art, the invention has the beneficial effects that:
1. in the hydraulic motor, high-pressure oil output by a hydraulic oil source enters an oil inlet of the plunger motor after passing through the stop valve to drive the plunger motor to work, meanwhile, the high-pressure oil output by the hydraulic oil source enters a first working port A and a second working port B of the plunger motor after passing through the variable control valve and the servo valve, and an operator can control the variable size and the variable direction of the plunger motor by adjusting the proportional positions of the variable control valve and the servo valve, so that the bidirectional variable control of the hydraulic motor is realized. Therefore, the design can realize bidirectional variable control of the hydraulic motor through the proportional positions of the variable control valve and the servo valve.
2. In the hydraulic motor, the first working port of the servo valve is communicated with the third working port of the variable control valve, the second working port of the servo valve is communicated with the fourth working port of the variable control valve, the oil inlet of the servo valve is communicated with the high-pressure oil port of the hydraulic oil source, the oil outlet of the servo valve is communicated with the low-pressure oil port of the hydraulic oil source, and an operator can accurately control the speed of the variable of the plunger motor by controlling the loading amplitude of the servo valve to realize the stepless speed regulation of the plunger motor.
3. In the hydraulic motor, when the variable control valve electromagnet is in a proportional right position state, the forward displacement of the plunger motor is reduced, and when the forward displacement of the plunger motor is less than zero, the plunger motor accelerates to move in the reverse direction, so that the plunger motor can convert the gravitational potential energy of the descending of a hoisted object into kinetic energy and output the kinetic energy to the outside, and the gravitational potential energy recovery function is realized. Therefore, the design can enable the positive displacement of the plunger motor to be smaller than zero through the variable control valve, so that the gravitational potential energy recovery function is realized, and the energy-saving effect of the system is effectively improved.
4. According to the hydraulic motor, the oil inlet of the oil supplementing check valve is communicated with the low-pressure oil port of the hydraulic oil source, the oil outlet of the oil supplementing check valve is communicated with the high-pressure oil port of the plunger motor, when the high-pressure oil path of the hydraulic oil source leaks or the hydraulic oil source stops supplying oil due to reasons such as power failure, the pressure of the high-pressure oil path in the hydraulic oil source is abnormally reduced, each electromagnetic valve in the system cannot normally work, at the moment, the pressure of the low-pressure oil port of the hydraulic oil source is normal, the oil supplementing check valve is opened by the low-pressure oil, oil is supplemented to the high-pressure oil port of the plunger motor, the pressure of the oil inlet and the pressure of the oil outlet of the plunger motor are balanced, and the plunger motor is prevented from being damaged due to air suction. Therefore, the oil supplementing one-way valve can balance the pressure of the oil inlet and the oil outlet of the plunger motor when a high-pressure oil line of a hydraulic oil source is damaged, and avoid the damage of the plunger motor due to air suction.
Drawings
Fig. 1 is a hydraulic schematic of the present invention.
Fig. 2 is a hydraulic schematic of the shut-off valve of fig. 1.
Fig. 3 is a hydraulic schematic diagram of the plunger motor of fig. 1.
Fig. 4 is a hydraulic schematic diagram of the variable control valve of fig. 1.
Fig. 5 is a hydraulic schematic of the servo valve of fig. 1.
Fig. 6 is a hydraulic schematic of the relief valve of fig. 1.
In the figure: the hydraulic control system comprises a plunger motor 1, a motor oil cylinder 11, a power output shaft 12, a swash plate 13, a variable oil cylinder 14, a swing angle sensor 15, a rotating speed sensor 16, a variable control valve 2, a servo valve 3, a stop valve 4, an electromagnetic directional valve 41, a shuttle valve 42, a two-way cartridge valve 43, a proximity switch 44, a safety valve 5, a first safety valve group 51, a second safety valve group 52, an electromagnetic directional valve 53, a first overflow valve 54, a second overflow valve 55, a two-way cartridge valve 56 and an oil supplementing one-way valve 6.
Detailed Description
The present invention will be described in further detail with reference to the following description and embodiments in conjunction with the accompanying drawings.
Referring to fig. 1 to 6, a hydraulic motor includes: the control system comprises a plunger motor 1, a variable control valve 2, a servo valve 3, a stop valve 4 and a safety valve 5; the hydraulic control system comprises a plunger motor 1, a variable control valve 2, a servo valve 3, a low-pressure oil port of the plunger motor 1, a high-pressure oil port of the plunger motor 1, a stop valve 4, a variable control valve 2, a third working port of the variable control valve 2, a fourth working port of the variable control valve 2, a fifth working port of the variable control valve 2, a sixth working port of the variable control valve 2, an oil inlet of the servo valve 3, an oil outlet of the servo valve 3, a high-pressure oil port of a hydraulic oil source, an oil inlet of the stop valve 4, a high-pressure oil port of the hydraulic oil source, an oil outlet of a safety valve 4, a low-pressure oil port of the hydraulic oil source, a high-pressure oil port of the plunger motor 1, a low-pressure oil port of the hydraulic oil source, a high-pressure oil port of the safety valve 5, a relief valve 5, a safety valve and a safety valve.
The stop valve 4 comprises an electromagnetic directional valve 41, a shuttle valve 42, a two-way cartridge valve 43 and a proximity switch 44, the electromagnetic directional valve 41 is a two-position three-way electromagnetic directional valve, an oil inlet of the shuttle valve 42 is communicated with a high-pressure oil port of a hydraulic oil source, an oil outlet of the shuttle valve 42 is communicated with an A3 port of the variable control valve 2, an oil inlet of the electromagnetic directional valve 41 is communicated with an oil outlet of the shuttle valve 42, a working port of the electromagnetic directional valve 41 is communicated with a spring cavity of the two-way cartridge valve 43, an oil drain port of the electromagnetic directional valve 41 is communicated with a low-pressure oil port of the hydraulic oil source, a spring cavity of the two-way cartridge valve 43 is communicated with a low-pressure oil port of the hydraulic oil source, a reed-free cavity of the two-way cartridge valve 43 is communicated with the high-pressure oil port of the hydraulic oil source, a reed-free cavity of the two-way cartridge valve 43 is communicated with an oil inlet of the plunger motor 1, a detection end of the proximity switch 44 is in transmission fit with a valve core of the two-way cartridge valve 43, and the proximity switch 44 is in signal connection with an external system.
The plunger motor 1 comprises a motor oil cylinder 11, a power output shaft 12, a swash plate 13 and a variable oil cylinder 14, wherein an oil inlet of the motor oil cylinder 11 is communicated with a springless cavity of the two-way cartridge valve 43, an oil outlet of the motor oil cylinder 11 is communicated with a low-pressure oil port of a hydraulic oil source, the power output shaft 12 of the motor oil cylinder 11 is fixedly connected with a rotation center of the swash plate 13, the swash plate 13 is in transmission fit with a piston rod of the variable oil cylinder 14, a first working port A of the variable oil cylinder 14 is communicated with a first working port of the variable control valve 2, and a second working port B is communicated with a second working port of the variable control valve 2.
The variable control valve 2 is a two-position six-way electromagnetic directional valve, the variable control valve 2 is in signal connection with an external electric control system, a first working port of the variable control valve 2 is communicated with a first working port A of a variable oil cylinder 13, a second working port of the variable control valve 2 is communicated with a second working port B of the variable oil cylinder 13, a third working port of the variable control valve 2 is communicated with a first working port of a servo valve 3, a fourth working port of the variable control valve 2 is communicated with a second working port of the servo valve 3, a fifth working port of the variable control valve 2 is communicated with an oil outlet of a stop valve 4, a sixth working port of the variable control valve 2 is communicated with a low-pressure oil port of a hydraulic oil source, and the servo valve 3 is a four-position four-way directional valve with a displacement sensor.
The safety valve 5 includes a first safety valve set 51 and a second safety valve set 52, and the first safety valve set 51 and the second safety valve set 52 have the same structure.
The first safety valve group 51 comprises an electromagnetic directional valve 53, a first overflow valve 54, a second overflow valve 55 and a two-way cartridge valve 56, wherein an oil inlet of the two-way cartridge valve 56 is communicated with a high-pressure oil port of the plunger motor 1, an oil outlet of the two-way cartridge valve 56 is communicated with an oil inlet of the second overflow valve 55, an oil drain port of the two-way cartridge valve 56 is communicated with a low-pressure oil port of a hydraulic oil source, an oil outlet of the second overflow valve 55 is communicated with a low-pressure oil port of the hydraulic oil source, an oil inlet of the electromagnetic directional valve 53 is communicated with an oil outlet of the two-way cartridge valve 56, an oil outlet of the electromagnetic directional valve 53 is communicated with a low-pressure oil port of the hydraulic oil source, a working port of the electromagnetic directional valve 53 is communicated with an oil inlet of the first overflow valve 54, and an oil outlet of the first overflow valve 54 is communicated with a low-pressure oil port of the hydraulic oil source.
The hydraulic motor further comprises an oil supplementing one-way valve 6, an oil inlet of the oil supplementing one-way valve 6 is communicated with a low-pressure oil port of a hydraulic oil source, and an oil outlet of the oil supplementing one-way valve 6 is communicated with a high-pressure oil port of the plunger motor 1.
The plunger motor 1 further comprises a rotating speed sensor 16, the power output shaft 12 of the plunger motor 1 is in transmission fit with the detection end of the rotating speed sensor 16, and the rotating speed sensor 16 is in signal connection with an external electric control system.
The plunger motor 1 further comprises two pressure measuring oil ports, and the two pressure measuring oil ports are respectively used for measuring the working pressures of the left cavity and the right cavity of the variable oil cylinder 14.
The principle of the invention is illustrated as follows:
the use includes standby condition, winch ascending condition and winch descending condition in this design, and wherein the standby condition is:
high-pressure oil output by a hydraulic oil source enters an oil inlet of the electromagnetic directional valve 41 and a spring cavity of the two-way cartridge valve 43, when the electromagnetic directional valve 41, the variable control valve 2 and the servo valve 3 are not powered, a valve core of the electromagnetic directional valve 41 is in the right position, the variable control valve 2 is opened, the oil inlet and a working port of the electromagnetic directional valve 41 are communicated, the high-pressure oil enters the spring cavity of the two-way cartridge valve 43 through the working port of the electromagnetic directional valve 41 to push the valve core of the two-way cartridge valve 43, the two-way cartridge valve 43 is closed, meanwhile, the high-pressure oil output by the hydraulic oil source enters the variable oil cylinder 14 through the variable control valve 2 to drive the variable oil cylinder 14 to force the plunger motor 1 to be in a maximum displacement state, and the plunger motor 1 keeps static due to the fact that the negative load of a winch is lower than the maximum displacement state of the plunger motor 1.
The winch rises the operating mode:
high-pressure oil output by a hydraulic oil source enters an oil inlet of an electromagnetic directional valve 41 and a spring cavity of a two-way cartridge valve 43, when the electromagnetic directional valve 41 is electrified, a valve core of the electromagnetic directional valve 41 is in a left position, after the electromagnetic directional valve 41 is electrified, an electromagnet of a servo valve 3 is electrified and is in a proportional left position working state, after the servo valve 3 is electrified, a variable control valve 2 is electrified, an electromagnet of the variable control valve 2 is in a left position state, an oil drain port of the electromagnetic directional valve 41 is communicated with a working port at the moment, hydraulic oil in the spring cavity of the two-way cartridge valve 43 enters a low-pressure oil port output by the hydraulic oil source through an oil drain port of the electromagnetic directional valve 41, so that the two-way cartridge valve 43 is opened, at the moment, the high-pressure oil output by the hydraulic oil source enters a plunger motor 1 through an oil outlet of the two-way cartridge valve 43, and simultaneously, the high-pressure oil output by the hydraulic oil source enters a left cavity of a variable oil cylinder 14 through the variable control valve 2 and the servo valve 3, so that the plunger motor 1 is in a forward displacement control winch, and the forward displacement rise of the winch is realized by controlling the left position amplitude of the servo valve 3.
The descending working condition of the winch is as follows:
high-pressure oil output by a hydraulic oil source enters an oil inlet of an electromagnetic directional valve 41 and a spring cavity of a two-way cartridge valve 43, when the electromagnetic directional valve 41 is electrified, a valve core of the electromagnetic directional valve 41 is in a left position, after the electromagnetic directional valve 41 is electrified, a variable control valve 2 is electrified, an electromagnet of the variable control valve 2 is in a proportional right position state, after the variable control valve 2 is electrified, an electromagnet of a servo valve 3 is electrified and is in a right position working state, an oil drain port of the electromagnetic directional valve 41 is communicated with a working port, hydraulic oil in the spring cavity of the two-way cartridge valve 43 enters a low-pressure oil port output by the hydraulic oil source through an oil drain port of the electromagnetic directional valve 41, so that the two-way cartridge valve 43 is opened, at the moment, the high-pressure oil output by the hydraulic oil source enters a plunger motor 1 through an oil outlet of the two-way cartridge valve 43, meanwhile, the high-pressure oil output by the hydraulic oil source enters a right cavity of a variable cylinder 14 through the variable control valve 2 and the servo valve 3, so that the plunger motor 1 is gradually changed from a positive-to-negative-direction conversion state, the right displacement of the servo valve 3 is controlled, the displacement of the plunger motor is reduced, and the positive-direction displacement of the plunger motor 1 is smaller than that the winch is accelerated to move in a reverse direction, and the winch.
Example 1:
a hydraulic motor, comprising: the control system comprises a plunger motor 1, a variable control valve 2, a servo valve 3, a stop valve 4 and a safety valve 5; a low-pressure oil port of the plunger motor 1 is communicated with a low-pressure oil port of a hydraulic oil source, a high-pressure oil port of the plunger motor 1 is communicated with a working port of a stop valve 4, a first working port of the variable control valve 2 is communicated with a first working port A of the plunger motor 1, a second working port of the variable control valve 2 is communicated with a second working port B of the plunger motor 1, a third working port of the variable control valve 2 is communicated with a first working port of a servo valve 3, a fourth working port of the variable control valve 2 is communicated with a second working port of the servo valve 3, a fifth working port of the variable control valve 2 is communicated with an oil outlet of the stop valve 4, a sixth working port of the variable control valve 2 is communicated with a low-pressure oil port of the hydraulic oil source, an oil inlet of the servo valve 3 is communicated with a high-pressure oil port of the hydraulic oil source, an oil outlet of the servo valve 3 is communicated with a low-pressure oil port of the hydraulic oil source, an oil inlet of the servo valve 4 is communicated with a high-pressure oil port of the hydraulic oil source, an oil outlet of the hydraulic oil source is communicated with a high-pressure oil port of the stop valve 5 of the hydraulic oil source, and an unloading safety valve 5 of the plunger motor 1 is communicated with a high-pressure oil source; the stop valve 4 comprises an electromagnetic directional valve 41, a shuttle valve 42, a two-way cartridge valve 43 and a proximity switch 44, the electromagnetic directional valve 41 is a two-position three-way electromagnetic directional valve, an oil inlet of the shuttle valve 42 is communicated with a high-pressure oil port of a hydraulic oil source, an oil outlet of the shuttle valve 42 is communicated with an A3 port of the variable control valve 2, an oil inlet of the electromagnetic directional valve 41 is communicated with an oil outlet of the shuttle valve 42, a working port of the electromagnetic directional valve 41 is communicated with a spring cavity of the two-way cartridge valve 43, an oil drain port of the electromagnetic directional valve 41 is communicated with a low-pressure oil port of the hydraulic oil source, a spring cavity of the two-way cartridge valve 43 is communicated with a low-pressure oil port of the hydraulic oil source, a reed-free cavity of the two-way cartridge valve 43 is communicated with the high-pressure oil port of the hydraulic oil source, a reed-free cavity of the two-way cartridge valve 43 is communicated with an oil inlet of the plunger motor 1, a detection end of the proximity switch 44 is in transmission fit with a valve core of the two-way cartridge valve 43, and the proximity switch 44 is in signal connection with an external system.
This design is in the use:
high-pressure oil output by the hydraulic oil source enters an oil inlet of the plunger motor 1 through the stop valve 4 to drive the plunger motor 1 to work, meanwhile, the high-pressure oil output by the hydraulic oil source enters a first working port A and a second working port B of the plunger motor 1 through the variable control valve 2 and the servo valve 3, the variable size and the variable direction of the plunger motor 1 are controlled through the proportional position of the variable control valve 2 and the servo valve 3,
the hydraulic oil enters an oil inlet of the electromagnetic directional valve 41 and a spring cavity of the two-way cartridge valve 43, when the electromagnetic directional valve 41 is powered, a valve core of the electromagnetic directional valve 41 is in a left position, after the electromagnetic directional valve 41 is powered, an electromagnet of the servo valve 3 is powered and is in a proportional left position working state, after the servo valve 3 is powered, the variable control valve 2 is powered, an electromagnet of the control valve 2 is in a left position state, at the moment, an oil drainage port of the electromagnetic directional valve 41 is communicated with a working port, hydraulic oil in the spring cavity of the two-way cartridge valve 43 enters a low-pressure oil port output by a hydraulic oil source through the oil drainage port of the electromagnetic directional valve 41, the two-way cartridge valve 43 is opened, at the moment, high-pressure oil output by the hydraulic oil source enters the plunger motor 1 through an oil outlet of the two-way cartridge valve 43, meanwhile, the high-pressure oil output by the hydraulic oil source enters a left cavity of the variable oil cylinder 14 through the variable control valve 2 and the servo valve 3, so that the displacement of the plunger motor 1 is in a forward state, and the left position amplitude of the servo valve 3 is controlled, so that the positive displacement of the plunger motor 1 is realized, and the winch is controlled.
Example 2:
example 2 is substantially the same as example 1 except that:
the plunger motor 1 comprises a motor oil cylinder 11, a power output shaft 12, a swash plate 13 and a variable oil cylinder 14, wherein an oil inlet of the motor oil cylinder 11 is communicated with a springless cavity of the two-way cartridge valve 43, an oil outlet of the motor oil cylinder 11 is communicated with a low-pressure oil port of a hydraulic oil source, the power output shaft 12 of the motor oil cylinder 11 is fixedly connected with a rotation center of the swash plate 13, the swash plate 13 is in transmission fit with a piston rod of the variable oil cylinder 14, a first working port A of the variable oil cylinder 14 is communicated with a first working port of the variable control valve 2, and a second working port B is communicated with a second working port of the variable control valve 2.
Example 3:
example 3 is substantially the same as example 2 except that:
the variable control valve 2 is a two-position six-way electromagnetic directional valve, the variable control valve 2 is in signal connection with an external electric control system, a first working port of the variable control valve 2 is communicated with a first working port A of a variable oil cylinder 13, a second working port of the variable control valve 2 is communicated with a second working port B of the variable oil cylinder 13, a third working port of the variable control valve 2 is communicated with a first working port of a servo valve 3, a fourth working port of the variable control valve 2 is communicated with a second working port of the servo valve 3, a fifth working port of the variable control valve 2 is communicated with an oil outlet of a stop valve 4, a sixth working port of the variable control valve 2 is communicated with a low-pressure oil port of a hydraulic oil source, and the servo valve 3 is a four-position four-way directional valve with a displacement sensor; the safety valve 5 comprises a first safety valve group 51 and a second safety valve group 52, and the first safety valve group 51 and the second safety valve group 52 have the same structure; the first safety valve group 51 comprises an electromagnetic directional valve 53, a first overflow valve 54, a second overflow valve 55 and a two-way cartridge valve 56, wherein an oil inlet of the two-way cartridge valve 56 is communicated with a high-pressure oil port of the plunger motor 1, an oil outlet of the two-way cartridge valve 56 is communicated with an oil inlet of the second overflow valve 55, an oil drain port of the two-way cartridge valve 56 is communicated with a low-pressure oil port of a hydraulic oil source, an oil outlet of the second overflow valve 55 is communicated with a low-pressure oil port of the hydraulic oil source, an oil inlet of the electromagnetic directional valve 53 is communicated with an oil outlet of the two-way cartridge valve 56, an oil outlet of the electromagnetic directional valve 53 is communicated with a low-pressure oil port of the hydraulic oil source, a working port of the electromagnetic directional valve 53 is communicated with an oil inlet of the first overflow valve 54, and an oil outlet of the first overflow valve 54 is communicated with a low-pressure oil port of the hydraulic oil source; the hydraulic motor further comprises an oil supplementing one-way valve 6, an oil inlet of the oil supplementing one-way valve 6 is communicated with a low-pressure oil port of a hydraulic oil source, and an oil outlet of the oil supplementing one-way valve 6 is communicated with a high-pressure oil port of the plunger motor 1; the plunger motor 1 further comprises a swing angle sensor 15, the detection end of the swing angle sensor 15 is perpendicular to the telescopic rod of the plunger motor 1, a feeler lever of the swing angle sensor 15 is in transmission fit with a piston rod of the variable oil cylinder 13, and the swing angle sensor 15 is in signal connection with an external electric control system; the plunger motor 1 further comprises a rotating speed sensor 16, the power output shaft 12 of the plunger motor 1 is in transmission fit with the detection end of the rotating speed sensor 16, and the rotating speed sensor 16 is in signal connection with an external electronic control system; the plunger motor 1 further comprises two pressure measuring oil ports, and the two pressure measuring oil ports are respectively used for measuring the working pressures of the left cavity and the right cavity of the variable oil cylinder 14.
The above embodiments are only preferred embodiments of the present disclosure, and the protection scope of the present disclosure is not limited to the above embodiments, but equivalent modifications or changes made by those skilled in the art according to the present disclosure should be included in the protection scope of the claims.
Claims (10)
1. A hydraulic motor, characterized by:
the hydraulic motor includes: the control system comprises a plunger motor (1), a variable control valve (2), a servo valve (3), a stop valve (4) and a safety valve (5); a low-pressure oil port of the plunger motor (1) is communicated with a low-pressure oil port of a hydraulic oil source, a high-pressure oil port of the plunger motor (1) is communicated with a working port of the stop valve (4), the first working port of the variable control valve (2) is communicated with the first working port A of the plunger motor (1), the second working port of the variable control valve (2) is communicated with the second working port B of the plunger motor (1), the third working port of the variable control valve (2) is communicated with the first working port of the servo valve (3), the fourth working port of the variable control valve (2) is communicated with the second working port of the servo valve (3), a fifth working port of the variable control valve (2) is communicated with an oil outlet of the stop valve (4), a sixth working port of the variable control valve (2) is communicated with a low-pressure oil port of a hydraulic oil source, an oil inlet of the servo valve (3) is communicated with a high-pressure oil port of a hydraulic oil source, the oil outlet of the servo valve (3) is communicated with a low-pressure oil port of a hydraulic oil source, an oil inlet of the stop valve (4) is communicated with a high-pressure oil port of a hydraulic oil source, the oil outlet of the stop valve (4) is communicated with a fifth working port of the variable control valve (2), an unloading control oil port of the stop valve (4) is communicated with a low-pressure oil port of a hydraulic oil source, an oil inlet of the safety valve (5) is communicated with a high-pressure oil port of the plunger motor (1), and an oil discharge port of the safety valve (5) is communicated with a low-pressure oil port of the hydraulic oil source.
2. A hydraulic motor as recited in claim 1, wherein:
the stop valve (4) comprises an electromagnetic directional valve (41), a shuttle valve (42), a two-way cartridge valve (43) and a proximity switch (44), the electromagnetic directional valve (41) is a two-position three-way electromagnetic directional valve, an oil inlet of the shuttle valve (42) is communicated with a high-pressure oil port of a hydraulic oil source, an oil outlet of the shuttle valve (42) is communicated with an A3 port of the variable control valve (2), an oil inlet of the electromagnetic directional valve (41) is communicated with an oil outlet of the shuttle valve (42), a working port of the electromagnetic directional valve (41) is communicated with a spring cavity of the two-way cartridge valve (43), an oil drain port of the electromagnetic directional valve (41) is communicated with a low-pressure oil port of the hydraulic oil source, a spring cavity of the two-way cartridge valve (43) is communicated with a low-pressure oil port of the hydraulic oil source, a springless cavity of the two-way cartridge valve (43) is communicated with a high-pressure oil port of the hydraulic oil source, a springless cavity of the two-way cartridge valve (43) is communicated with an oil inlet of the plunger motor (1), a detection end of the proximity switch (44) is matched with a transmission valve core (43), and an electronic control system is connected with the external electronic control system.
3. A hydraulic motor as claimed in claim 2, wherein:
the plunger motor (1) comprises a motor oil cylinder (11), a power output shaft (12), a swash plate (13) and a variable oil cylinder (14), wherein an oil inlet of the motor oil cylinder (11) is communicated with a spring-free cavity of a two-way cartridge valve (43), an oil outlet of the motor oil cylinder (11) is communicated with a low-pressure oil port of a hydraulic oil source, the power output shaft (12) of the motor oil cylinder (11) is fixedly connected with a rotating center of the swash plate (13), the swash plate (13) is in transmission fit with a piston rod of the variable oil cylinder (14), a first working port A of the variable oil cylinder (14) is communicated with a first working port of a variable control valve (2), and a second working port B is communicated with a second working port of the variable control valve (2).
4. A hydraulic motor as claimed in claim 1, 2 or 3, wherein:
the variable control valve (2) is a two-position six-way electromagnetic reversing valve, the variable control valve (2) is in signal connection with an external electric control system, a first working port of the variable control valve (2) is communicated with a first working port A of a variable oil cylinder 13, a second working port of the variable control valve (2) is communicated with a second working port B of the variable oil cylinder 13, a third working port of the variable control valve (2) is communicated with a first working port of a servo valve (3), a fourth working port of the variable control valve (2) is communicated with a second working port of the servo valve (3), a fifth working port of the variable control valve (2) is communicated with an oil outlet of a stop valve (4), a sixth working port of the variable control valve (2) is communicated with a low-pressure oil source, and the servo valve (3) is a four-way reversing valve with a displacement sensor.
5. A hydraulic motor according to claim 4, wherein:
the safety valve (5) comprises a first safety valve group (51) and a second safety valve group (52), and the first safety valve group (51) and the second safety valve group (52) are identical in structure.
6. A hydraulic motor as claimed in claim 5, wherein:
the first safety valve group (51) comprises an electromagnetic directional valve (53), a first overflow valve (54), a second overflow valve (55) and a two-way cartridge valve (56), wherein an oil inlet of the two-way cartridge valve (56) is communicated with a high-pressure oil port of the plunger motor (1), an oil outlet of the two-way cartridge valve (56) is communicated with an oil inlet of the second overflow valve (55), an oil drainage port of the two-way cartridge valve (56) is communicated with a low-pressure oil port of a hydraulic oil source, an oil outlet of the second overflow valve (55) is communicated with a low-pressure oil port of the hydraulic oil source, an oil inlet of the electromagnetic directional valve (53) is communicated with an oil outlet of the two-way cartridge valve (56), an oil outlet of the electromagnetic directional valve (53) is communicated with the low-pressure oil port of the hydraulic oil source, a working port of the electromagnetic directional valve (53) is communicated with an oil inlet of the first overflow valve (54), and an oil outlet of the first overflow valve (54) is communicated with the low-pressure oil port of the hydraulic oil source.
7. A hydraulic motor as recited in claim 6, wherein:
the hydraulic motor further comprises an oil supplementing one-way valve (6), an oil inlet of the oil supplementing one-way valve (6) is communicated with a low-pressure oil port of a hydraulic oil source, and an oil outlet of the oil supplementing one-way valve (6) is communicated with a high-pressure oil port of the plunger motor (1).
8. A hydraulic motor as recited in claim 7, wherein:
plunger motor (1) still includes pivot angle sensor (15), the detection end perpendicular to plunger motor (1) of pivot angle sensor (15) telescopic link setting, the feeler lever of pivot angle sensor (15) and the piston rod transmission cooperation of variable hydro-cylinder 13, pivot angle sensor (15) and outside electrical system signal connection.
9. A hydraulic motor as recited in claim 8, wherein:
the plunger motor (1) further comprises a rotating speed sensor (16), a power output shaft (12) of the plunger motor (1) is in transmission fit with a detection end of the rotating speed sensor (16), and the rotating speed sensor (16) is in signal connection with an external electric control system.
10. A hydraulic motor as set forth in claim 9, wherein:
the plunger motor (1) further comprises two pressure measuring oil ports, and the two pressure measuring oil ports are respectively used for measuring the working pressure of the left cavity and the right cavity of the variable oil cylinder (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310003646.4A CN115962168A (en) | 2023-01-03 | 2023-01-03 | Hydraulic motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310003646.4A CN115962168A (en) | 2023-01-03 | 2023-01-03 | Hydraulic motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115962168A true CN115962168A (en) | 2023-04-14 |
Family
ID=87357682
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310003646.4A Pending CN115962168A (en) | 2023-01-03 | 2023-01-03 | Hydraulic motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115962168A (en) |
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2023
- 2023-01-03 CN CN202310003646.4A patent/CN115962168A/en active Pending
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