CN111649023B - Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system - Google Patents
Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system Download PDFInfo
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- CN111649023B CN111649023B CN202010679833.0A CN202010679833A CN111649023B CN 111649023 B CN111649023 B CN 111649023B CN 202010679833 A CN202010679833 A CN 202010679833A CN 111649023 B CN111649023 B CN 111649023B
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- reversing valve
- energy accumulator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
Abstract
The invention relates to a buffering oil supplementing system and method for an electro-hydraulic double-control motor driving rotation system. The oil supplementing reversing valve is connected into a hydraulic rotary motor loop, and an energy accumulator is utilized to provide an oil source for the oil supplementing reversing valve through a pressure reducing valve; when the multi-way valve for controlling the hydraulic rotary motor is positioned at the middle position, the oil supplementing reversing valve works at the middle position to automatically supplement oil for the hydraulic rotary motor pipeline; in the action process of the hydraulic rotary motor, an oil inlet of the oil supplementing and supplementing reversing valve is communicated with the low-pressure end of the hydraulic rotary motor, and the energy accumulator is stamped by utilizing the oil return back pressure of the hydraulic rotary motor. The invention solves the technical problems that the oil storage and supplement in the prior art is insufficient, the hydraulic control automatic oil supplement cannot be realized, the system automation degree is low, and the energy loss is large.
Description
Technical Field
The invention relates to a buffering oil supplementing system and method, belongs to the field of drilling equipment, and particularly relates to a buffering oil supplementing system and method for an electro-hydraulic double-control motor driving rotation system.
Background
The hydraulic transmission has the advantages of large power weight, flexible element installation and arrangement, stepless speed regulation and the like, and is widely applied to drilling machines, such as rotary motors, such as motors, oil cylinders and the like, for controlling the rotation, feeding, lifting and auxiliary actions of the drilling machine. Along with the improvement of the capacity of a drilling machine, the structural size of the drilling machine is larger and larger, the height difference between a hydraulic rotary motor and an oil tank is larger and larger, for example, a coal bed gas vehicle-mounted drilling machine is taken as an example, the maximum height of a power head of the drilling machine exceeds 15m from the ground, and because a multi-way valve for controlling the action of the hydraulic rotary motor is generally a slide valve, the problem of middle position leakage is difficult to avoid, so that the use of equipment is intermittent, hydraulic oil in a pipeline of the rotary motor flows back to the oil tank, so that air enters the pipeline, as is well known, the air enters a hydraulic system, the damage to the system is fatal, the rotary motor cannot act, the coordination is caused by light persons, the problems of delayed action noise and the like are caused, serious persons cause the damage of cavitation and the like, the reliability of the system is reduced, and the service life is prolonged. On the other hand, when the rotary inertia of the rotary system is large, and when the rotary motor is in a sudden stop, large impact can be generated at the oil return port of the motor due to the existence of inertia, and a systematic phenomenon is generated at the oil inlet of the motor, so that the service life of the motor is greatly reduced,
at present, the conventional solution is to arrange an oil-supplementing check valve and a buffer valve in a hydraulic system for passively supplementing oil to the system, and simultaneously the buffer valve overflows to reduce system impact, and the mode has certain problems in practical use, firstly, an oil-supplementing loop is adopted, the check valve is adopted for supplementing oil to the system, the oil-supplementing mode pushes the oil-supplementing check valve to open by utilizing the pressure difference between atmospheric pressure and a motor oil inlet through the self-priming action of a motor only under the condition that negative pressure occurs in the system, so as to supplement oil to the system, however, because the height difference between a part of rotary motors and an oil tank is too large, the method is difficult to really play a role, and the other method is to add a low-pressure oil-supplementing pump in the system, the method solves the oil-supplementing problem when a drilling machine starts up, but because the oil-supplementing pump is always in a working state, the extra energy loss of the system is increased, and the service life of the oil supplementing pump is short, and in the buffer circuit, as the overflow valve is used as the buffer valve, when the rotary motor stops rotating, the return oil impact of the rotary motor is unloaded through the overflow valve and finally converted into heat to be lost, so that the energy is directly wasted in the aspect of energy saving, and the burden of a cooling system is increased.
Disclosure of Invention
The invention mainly solves the technical problems of insufficient oil storage and supplement, incapability of realizing hydraulic control automatic oil supplement, low system automation degree and large energy loss in the prior art, and provides a buffering oil supplement system and a buffering oil supplement method for an electro-hydraulic double-control motor driving rotary system.
The technical problem of the invention is mainly solved by the following technical scheme:
the utility model provides a two accuse motor drive rotation system of electricity buffering oil supplementing device, includes:
the direction control port A and the direction control port B of the oil supplementing reversing valve are respectively connected with the direction control port A and the direction control port B of the hydraulic rotary motor and the direction control port A and the direction control port B of the multi-way valve, the oil return port T of the oil supplementing reversing valve is connected with the oil inlet B of the one-way valve, and the hydraulic control end of the oil supplementing reversing valve is connected with the hydraulic control end of the multi-way valve for controlling the hydraulic rotary motor in parallel;
the oil supplementing loop comprises an energy accumulator, the energy accumulator is connected with an oil return port T of the oil supplementing reversing valve through a pressure reducing valve, and the oil return port T of the oil supplementing reversing valve is connected with the energy accumulator through a one-way valve.
Preferably, in the above buffering oil supplementing device for the electro-hydraulic double-control motor-driven rotation system, when the middle position of the oil supplementing reversing valve works, the direction control port a and the direction control port B of the hydraulic rotation motor are communicated with an oil supplementing loop; when the oil supplementing reversing valve works at the left position, a low-pressure port of the hydraulic rotary motor is communicated with an oil supplementing loop.
Preferably, the buffering oil supplementing device for the electro-hydraulic double-control motor-driven rotation system further comprises an oil supplementing pump connected with the energy accumulator through a one-way valve, and the oil supplementing pump is used for supplementing oil to the energy accumulator when the pressure of the energy accumulator is insufficient.
Preferably, the above-mentioned buffering oil supplementing device for the electrohydraulic double-control motor-driven rotation system, the oil supplementing loop further includes:
the power source is connected with the oil replenishing pump through a clutch;
and the spring return oil cylinder is connected with the energy accumulator, and when the pressure of the energy accumulator is smaller than the spring pressure of the spring return oil cylinder, the spring return oil cylinder automatically extends out to enable the clutch to be engaged.
Preferably, the above-mentioned buffering oil supplementing device for the electrohydraulic double-control motor-driven rotation system, the oil supplementing loop further includes:
the two-position two-way reversing valve is arranged between the oil port of the energy accumulator and the spring reset oil cylinder, and when the two-position two-way reversing valve is in a normal position, an oil way between the energy accumulator and the spring reset oil cylinder is disconnected;
and the controller controls the two-position two-way reversing valve to reverse according to the pressure of the energy accumulator obtained by the pressure sensor arranged on the oil path of the energy accumulator and the two-position two-way reversing valve.
A buffering oil supplementing method for an electro-hydraulic double-control motor driving rotation system comprises the following steps:
an oil supplementing reversing valve is connected to a hydraulic rotary motor loop, and an energy accumulator is used for providing an oil source for the oil supplementing reversing valve through a pressure reducing valve;
when the multi-way valve for controlling the hydraulic rotary motor is positioned at the middle position, the oil supplementing reversing valve works at the middle position to automatically supplement oil for the hydraulic rotary motor pipeline;
in the action process of the hydraulic rotary motor, an oil inlet of the oil supplementing and supplementing reversing valve is communicated with the low-pressure end of the hydraulic rotary motor, and the energy accumulator is stamped by utilizing the oil return back pressure of the hydraulic rotary motor.
Preferably, the above-mentioned method for buffering and supplementing oil for the rotation system driven by the electrohydraulic double-control motor includes:
a hydraulic control automatic oil replenishing pump is arranged in the loop, and when the pressure of the energy accumulator is lower than a set value, the energy accumulator is pressurized through the engagement of a clutch.
Therefore, the oil is actively supplemented to the hydraulic rotary motor pipeline through the energy accumulator, and the damage to the hydraulic system and elements caused by air entering the hydraulic system due to pipeline leakage when the multi-way valve is in the middle position is avoided. When the rotary motor acts, the oil return back pressure of the rotary motor is fully utilized to charge the energy accumulator, and the purpose of energy conservation is achieved. When the hydraulic rotary motor is in sudden stop, the connection of the A, B port of the motor is realized by utilizing the middle position of the oil supplementing reversing valve, and the motor floats, so that the problems that when the hydraulic rotary motor is in sudden stop with large inertia, air suction occurs at an oil inlet and great impact is generated at an oil return port to reduce the service life of the motor are solved. The oil supplementing system can automatically supplement oil for the pipeline, and meanwhile, the oil supplementing pressure can be adjusted according to the height difference between the pipeline and the oil tank, so that redundant leakage is avoided. The hydraulic control automatic oil supplementing system does not need a complex electronic control system, realizes automatic oil supplementing through hydraulic logic, is simple in system composition, saves system construction cost, is convenient for system integration, can be used for new product design, can be conveniently installed on existing equipment, and optimizes and improves the existing equipment.
Drawings
FIG. 1 is a schematic diagram of a conventional buffer oil-supplementing system
FIG. 2 is a schematic diagram of a buffering and oil supplementing system according to the present invention
FIG. 3 is a schematic diagram of the present invention for charging an accumulator with back pressure
FIG. 4 is a schematic diagram of the accumulator being pressurized by the oil replenishing pump
FIG. 5 is a schematic diagram of the standby state with the oil supply pump and the power source separated
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example (b):
referring to fig. 1, fig. 1 is a hydraulic schematic diagram of a conventional buffer oil filling, a buffer overflow valve 102, 106 is arranged at a port of a motor A, B, two oil filling single- phase valves 103, 105 are respectively connected with a port of the motor A, B and an oil tank, taking the multi-way valve working at a left position, the motor turning forward, taking an oil inlet at a port a and an oil return at a port B as an example, the motor rotates, in the process, when the reversing valve suddenly changes to the right, the motor keeps turning forward due to inertia, at the moment, the motor changes to the oil inlet at a port B due to reversing of the multi-way valve, high-pressure impact is generated at the port B of the motor, and when the impact pressure is greater than the set pressure of the buffer overflow valve 106, the buffer overflow valve is opened, and is unloaded, so as to achieve the purpose of reducing the impact pressure. Similarly, in the process of forward rotation of the motor, the multi-way valve suddenly returns to the neutral position, at this time, the motor still has the tendency of keeping forward rotation due to the inertia effect, at this time, a larger impact pressure can be generated at the port B of the motor, the overflow valve 106 is used for unloading, the suction phenomenon can occur at the port A of the motor, at this time, under the action of atmospheric pressure, hydraulic oil is supplemented to the port A of the motor from the oil tank 107 through the one-way valve 103, so that the suction is prevented, and the problems of the conventional oil supplementing loop in the above processes can be seen; on the other hand, due to the height difference between the hydraulic rotary motor and the oil tank, hydraulic oil in the pipeline between the multi-way valve 101 and the motor 104 can flow back to the oil tank (even if the O-shaped middle position exists, the slide valve still leaks), air enters the pipeline, and the air entering the pipeline can cause the hydraulic rotary impact and the cavitation phenomenon to influence the response of the system and the service life of the motor; on the other hand, because the motor buffer valve is essentially an overflow valve, the impact pressure is directly unloaded to the oil tank in the working process of the buffer valve, and the energy is wasted.
Fig. 2 is a hydraulic schematic diagram of an embodiment of the present invention, and includes a power source 1, a clutch 2, a spring return cylinder 3, a two-position two-way directional valve 4, a controller 5, a pressure sensor 6, a first check valve 7, an accumulator 8, a pressure reducing valve 9, a second check valve 10, a hydraulic rotary motor 11, an oil-replenishing directional valve 12, a multi-way valve 13, a safety valve 14, and an oil-replenishing pump 15.
The oil supplementing reversing valve 12 in the embodiment is a three-position three-way hydraulic control reversing valve, and the middle position is Y-shaped;
oil supplementing pump 15P mouth is connected with first check valve 6A mouth, and energy storage ware 8P mouth is connected with first check valve 7A mouth, oil supplementing pump 15 provides the oil supply for oil supplementing system when 8 pressures of energy storage ware are not enough, and when first check valve 7 prevented oil supplementing pump 15 not work, 8 fluid of energy storage ware were revealed from oil supplementing pump.
The port 8P of the energy accumulator is connected with the port A of the spring reset oil cylinder (3), when the pressure of the energy accumulator 8 is greater than the pressure of the spring, the oil cylinder retracts, and when the pressure of the energy accumulator is less than the pressure of the spring, the oil cylinder automatically extends.
The spring reset oil cylinder 3 controls the clutch 2 to be opened and closed, the oil cylinder extends out, the clutch 2 is located at an engaging position, the oil cylinder retracts, and the clutch 2 is located at a separating position. The clutch 2 controls engagement and disengagement of the power source 1 and the oil replenishment pump 15, respectively. The spring reset oil cylinder 3 automatically senses the pressure of the energy accumulator 8 and controls the clutch (2) to realize the connection and the separation of the power source 1 and the oil replenishing pump 15.
And a two-position two-way reversing valve 4 is arranged between an oil port of the energy accumulator 8 and the spring reset oil cylinder 3. And when the two-position two-way reversing valve 4 is in a normal position, the oil way between the energy accumulator 8 and the spring reset oil cylinder 3 is disconnected.
And the oil passages of the energy accumulator 8 and the two-position two-way reversing valve 4 are provided with pressure sensors. The controller 5 obtains the pressure of the energy accumulator through the pressure sensor 7 and controls the two-position two-way 4 reversing valve to reverse.
The energy accumulator 8 is connected with a port of a pressure reducing valve 9A, the port of the pressure reducing valve 9A is connected with a port of an oil supplementing reversing valve 12T, and the energy accumulator 8 provides an oil source for the oil supplementing reversing valve 12 through the pressure reducing valve 9.
The accumulator 8 supplements oil for the pipeline between the oil supplementing reversing valve 12 and the hydraulic rotary motor 11 through the pressure reducing valve 9, the flowing direction of the hydraulic oil is shown by an arrow in figure 1, and the set value of the pressure reducing valve 9 can be adjusted according to the installation height of the hydraulic rotary motor 11 so as to avoid overhigh leakage caused by overhigh oil supplementing pressure.
The oil supplementing reversing valve 12 is connected with an opening 11A, B of the hydraulic rotary motor and an opening 13A, B of the multi-way valve 13. The pilot-controlled ends a and b of the oil-replenishing reversing valve 12 are connected with the pilot-controlled ends a and b of the multi-way valve 10. When the multi-way valve 13 is reversed, the oil supplementing reversing valve 12 is automatically reversed, the oil supplementing loop is always connected with the low-pressure end of the opening 11A, B of the hydraulic rotary motor 11, the opening T of the oil supplementing reversing valve is connected with the opening T of the second one-way valve 10B, the opening A of the second one-way valve 10A is connected with the opening P of the energy accumulator 8, and the energy accumulator 8 is pressurized by utilizing the oil returning back pressure of the motor.
The neutral position of the oil-supplementing reversing valve 12 is a Y-position, and when the neutral position of the multi-way valve 13 is the neutral position, the oil-supplementing reversing valve 12 is used for supplementing oil for a pipeline between an opening of the multi-way valve 13A, B and the hydraulic rotary motor 11.
When the multi-way valve 13 is switched from the working position to the neutral position, the oil supplementing reversing valve 12 automatically returns to the neutral position, because the neutral position of the oil supplementing reversing valve 12 is a Y-shaped position, at the moment, the opening A, B of the hydraulic rotary motor and the oil supplementing loop are communicated, the hydraulic rotary motor 11 is in a floating state, the oil supplementing reversing valve simultaneously serves as an A opening oil supplementing valve and a B opening buffer valve, in the process of buffering and supplementing oil, the opening 11A, B of the hydraulic rotary motor is directly connected with the oil supplementing loop, high-pressure impact oil at the opening B can be directly supplemented to the energy accumulator 8, the system has no overflow loss, and a better energy saving effect is achieved.
Referring to fig. 3, fig. 3 is a schematic diagram of the embodiment of the present invention for filling oil into the energy accumulator by using back pressure, when the multi-way valve 13 is reversed, as shown in fig. 2, the hydraulic rotary motor 11 operates, because the oil-filling reversing valve 12 and the multi-way valve 13 use one control source, the oil-filling reversing valve 12 is pushed to operate at the left, at this time, the oil-filling loop is communicated with the low-pressure end of the multi-way valve 13, the energy accumulator 8 is pressurized by using the back pressure of the multi-way valve 8, and the second check valve 10 is arranged on the punching loop, so that the pressure of the energy accumulator 8 can be effectively prevented from leaking from the low-pressure end of the multi-way valve 13 when the oil-filling back pressure is small.
The hydraulic control system comprises a power source 1, a clutch 2, a spring reset oil cylinder 3, a two-position two-way reversing valve 4, a controller 5, a pressure sensor 6, a first one-way valve 7, an energy accumulator 8, a pressure reducing valve 9, a second one-way valve 10, a hydraulic rotary motor 11, an oil supplementing reversing valve 12, a multi-way valve 13, a safety valve 14 and an oil supplementing pump 15.
Referring to fig. 4, fig. 4 is a schematic diagram of a pressure charging pump for an energy accumulator according to an embodiment of the present invention, a controller 5 obtains a working pressure of the energy accumulator 8 through a pressure sensor, when the pressure of the energy accumulator 8 is higher than a first set pressure, a two-position two-way directional valve 4 of the controller 5 works in a left position to cut off an oil path between the energy accumulator 8 and a spring return cylinder 3, when the pressure of the energy accumulator 8 is lower than the first set pressure, the two-position two-way directional valve 4 works in a right position, the oil path between the energy accumulator 8 and the spring return cylinder 3 is communicated, a spring force of the spring return cylinder 3 is greater than a force of the first set pressure acting on the cylinder, a cylinder rod of the spring return cylinder 3 extends to push a clutch 2 to be engaged, a power source 1 is connected with the oil charging pump 15, and the oil charging pump 15 works to stamp the energy accumulator 8.
Referring to fig. 5, fig. 5 is a diagram of a standby principle of separating the oil supplementing pump from the power source, when the accumulator 8 is pressed to a second set pressure value, the force of the second set pressure acting on the cylinder is greater than the force of the spring return cylinder 3 acting on the cylinder, at this time, the cylinder rod retracts, the oil supplementing pump 15 is separated from the power source 1, and the oil supplementing pump 15 stops working. The controller 5 controls the two-position two-way reversing valve 4 to reverse to the left position, waits for the next oil supplementing circulation, and can reduce the working frequency of the oil supplementing pump by setting the first oil supplementing pressure and the second oil supplementing pressure and logically controlling the on-off of the oil supplementing pump, so that the service life of the oil supplementing pump is prolonged.
The two-position two-way reversing valve 4 is normally positioned as a passage, so that electro-hydraulic dual control of the oil supplementing pump can be realized, under a normal condition, the clutch of the oil supplementing pump 15 is realized by electric control, when the electric control system breaks down, the two-position two-way reversing valve 4 works at the right position, the clutch of the oil supplementing pump 15 is controlled in a full hydraulic mode, when the pressure of the energy accumulator 8 acts on the spring reset oil cylinder 3, the force is larger than the spring pressure, the oil cylinder retracts, otherwise, the oil cylinder extends out, and the clutch of the oil supplementing pump is automatically realized through the hydraulic system, so that the use reliability of the system is improved.
Be provided with first check valve 6 between work energy storage ware 8 and the oil supplementing pump 15, its effect is when preventing that the oil supplementing pump is out of work, and energy storage ware 8 pressure oil is revealed from the oil supplementing pump, and relief valve 14 is the effect and prevents that oil supplementing pressure is too high, plays safety protection's effect.
After the structure is adopted, the buffering oil supplementing method for the electro-hydraulic double-control motor driving rotation system comprises the following specific steps: an oil supplementing reversing valve 12 is connected to a hydraulic rotary motor loop, an energy accumulator 8 provides an oil source for the oil supplementing reversing valve 12 through a pressure reducing valve 9, the working pressure of the pressure reducing valve 9 can be adjusted according to the height difference between the rotary motor and an oil tank, and the loss of redundant oil caused by overhigh oil supplementing pressure is avoided. When the multi-way valve 13 for controlling the hydraulic rotary motor 11 is in the neutral position, the oil-supplementing reversing valve 12 works in the neutral position to automatically supplement oil for the hydraulic rotary motor pipeline. The multi-way valve 13 controls oil and controls the oil-supplementing reversing valve 12 to act, in the action process of the hydraulic rotary motor 11, an oil inlet of the oil-supplementing multi-way valve 9 is directly communicated with a low-pressure end of the hydraulic rotary motor 11, and the energy accumulator 8 is stamped by utilizing oil return back pressure of the hydraulic rotary motor 11. Meanwhile, a hydraulic control automatic oil replenishing pump 15 is arranged in the loop, and when the pressure of the energy accumulator 8 is lower than a set value, the energy accumulator 8 is pressurized through the engagement of the clutch 2.
The oil supplementing loop of the energy accumulator 8 adopts electro-hydraulic dual control, the pressure of the energy accumulator 8 is obtained through a pressure sensor 6, the on-off of an oil circuit between the energy accumulator 8 and the spring reset oil cylinder 3 is controlled through a two-position two-way reversing valve 4, the on-off of an oil source is controlled through the spring reset oil cylinder 3, the oil of the energy accumulator 8 is supplemented to a first set pressure through logic control, when the pressure of the energy accumulator 8 is lower than a second set pressure, the oil circuit between the energy accumulator 8 and the spring reset oil cylinder 3 is communicated, the working pressure of the energy accumulator 8 is lower than the spring set pressure of the spring reset oil cylinder 3, the oil cylinder extends out, the rodless cavity oil of the spring reset oil cylinder 3 is pressed into the energy accumulator 8 to supplement a part of oil for the energy accumulator 8, the clutch 2 is simultaneously controlled to be communicated with the oil supplementing pump 15 and the power source 1 to supplement the oil for the energy accumulator 8 to the first set pressure, and the pressure is higher than the spring pressure of the spring reset oil cylinder 3, the oil cylinder rod retracts, the power source 1 is separated from the oil supplementing pump 15, then the controller controls the two-position two-way reversing valve to reverse, an oil way between the energy accumulator 8 and the spring reset oil cylinder 3 is disconnected, and the next circulation is waited.
When the two-position two-way reversing valve 4 is in a normal position, the energy accumulator 8 is communicated with an oil way between the spring reset oil cylinders 3, so that when an electric control system breaks down, the on-off state of the clutch 2 is automatically converted into full hydraulic automatic control from an electric control mode.
When the hydraulic rotary motor is in a sudden stop, the oil supplementing reversing valve works in the middle position, the middle position of the rotary motor is in a Y-shaped position at the moment, the rotary motor is in a floating state, the purposes of buffering and supplementing oil for the motor are achieved, and the problems of air suction of the oil inlet and impact of the oil return opening when the rotary motor is in a sudden stop are solved.
When the multi-way valve 13 for controlling the hydraulic rotary motor 11 to act is in the middle position, the oil supplementing loop actively supplements oil for the working oil pipe of the multi-way valve 13, and cavitation and system impact damage caused by air entering the pipeline due to pipeline leakage in the middle position are avoided.
When the rotary motor is in a sudden stop, the oil supplementing reversing valve works in the middle position, the middle position of the rotary motor is a Y-shaped position, the rotary motor is in a floating state, the purposes of buffering and supplementing the oil to the motor are achieved, and the problems of oil suction and oil return impact of an oil inlet when the rotary motor is in a sudden stop are solved.
In the action process of the hydraulic rotary motor 11, the oil supplementing reversing valve 12 controls the oil supplementing loop to be always communicated with the oil return port of the hydraulic rotary motor 11, and the oil return back pressure of the hydraulic rotary motor 11 is utilized to charge the energy accumulator 8, so that the aim of saving energy can be fulfilled.
The pressure of the energy accumulator 8 controls the connection and the disconnection of the clutch 2, when the pressure of the energy accumulator 8 is sufficient, the oil supplementing pump 15 is automatically separated from the power source 1, when the pressure of the energy accumulator 8 is insufficient, the clutch 2 is connected, and the oil supplementing pump 15 actively charges the energy accumulator 8. The safety valve 14 functions as a protection system. The automatic connection and separation of the oil supplementing pump are realized through hydraulic logic control, and a complex electric control system is not needed. The oil supplementing system is simple in composition, saves cost, saves energy and prolongs the service life of the oil supplementing system.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (4)
1. The utility model provides a two accuse motor drive revolution system of electricity liquid buffering oil supplementing device which characterized in that includes:
the direction control port A and the direction control port B of the oil supplementing reversing valve (12) are respectively connected with the direction control port A and the direction control port B of the hydraulic rotary motor (11) and the direction control port A and the direction control port B of the multi-way valve, the oil return port T of the oil supplementing reversing valve is connected with the oil inlet B of the second one-way valve (10), and the hydraulic control end of the oil supplementing reversing valve is connected with the hydraulic control end of the multi-way valve for controlling the hydraulic rotary motor (11) in parallel;
the oil supplementing loop comprises an energy accumulator (8), an oil supplementing pump (15), a power source (1) and a spring reset oil cylinder (3);
the energy accumulator (8) is connected with an oil return port T of the oil supplementing reversing valve (12) through a pressure reducing valve (9), and the oil return port T of the oil supplementing reversing valve (12) is connected with the energy accumulator (8) through a second one-way valve (10); the oil supplementing pump (15) is connected with the energy accumulator (8) through a first one-way valve (6), and the oil supplementing pump (15) is used for supplementing oil to the energy accumulator (8) when the pressure of the energy accumulator (8) is insufficient;
the power source (1) is connected with an oil supplementing pump (15) through a clutch (2);
the spring return oil cylinder (3) is connected with the energy accumulator (8), and when the pressure of the energy accumulator (8) is smaller than the spring pressure of the spring return oil cylinder (3), the spring return oil cylinder (3) automatically extends to enable the clutch (2) to be connected.
2. The buffering oil supplementing device of the electric-hydraulic double-control motor-driven rotary system according to claim 1, wherein when the oil supplementing reversing valve (12) works in a neutral position, a direction control port A and a direction control port B of the hydraulic rotary motor (11) are communicated with an oil supplementing loop; when the oil supplementing reversing valve (12) works at the left position, a low-pressure port of the hydraulic rotary motor (11) is communicated with an oil supplementing loop.
3. The buffering oil supplementing device for the electro-hydraulic double-control motor-driven rotation system according to claim 1, wherein the oil supplementing loop further comprises:
the two-position two-way reversing valve (4) is arranged between an oil port of the energy accumulator (8) and the spring reset oil cylinder (3), and when the two-position two-way reversing valve (4) is in a normal position, an oil way between the energy accumulator (8) and the spring reset oil cylinder (3) is disconnected;
and the controller (5) controls the two-position two-way reversing valve (4) to reverse according to the pressure of the energy accumulator obtained by a pressure sensor (7) arranged on the oil path of the energy accumulator (8) and the two-position two-way reversing valve (4).
4. A buffering oil supplementing method for an electro-hydraulic double-control motor driving rotation system is characterized by comprising the following steps:
an oil supplementing reversing valve (12) is connected into a hydraulic rotary motor loop, and an energy accumulator (8) is used for providing an oil source for the oil supplementing reversing valve (12) through a pressure reducing valve (9);
the oil supplementing reversing valve (12) is a three-position three-way hydraulic control reversing valve, and the middle position is Y-shaped;
when a multi-way valve (13) for controlling the hydraulic rotary motor (11) is positioned at a middle position, the oil supplementing reversing valve (12) works at the middle position and automatically supplements oil for a hydraulic rotary motor pipeline;
in the action process of the hydraulic rotary motor (11), an oil inlet of the oil supplementing reversing valve (12) is communicated with a low-pressure end of the hydraulic rotary motor (11), and an energy accumulator (8) is stamped by utilizing the oil return back pressure of the hydraulic rotary motor (11); an oil replenishing pump (15) is arranged in the loop, and when the pressure of the accumulator (8) is lower than a set value, the accumulator (8) is pressurized by engaging the clutch (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2019108571189 | 2019-09-11 | ||
| CN201910857118.9A CN110529448A (en) | 2019-09-11 | 2019-09-11 | A kind of electro-hydraulic dual control motor driving rotary system slow supply oil system and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111649023A CN111649023A (en) | 2020-09-11 |
| CN111649023B true CN111649023B (en) | 2022-04-15 |
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910857118.9A Withdrawn CN110529448A (en) | 2019-09-11 | 2019-09-11 | A kind of electro-hydraulic dual control motor driving rotary system slow supply oil system and method |
| CN202010679833.0A Active CN111649023B (en) | 2019-09-11 | 2020-07-15 | Buffering oil supplementing system and method for electro-hydraulic double-control motor driving rotation system |
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| CN112503036B (en) * | 2020-12-04 | 2023-03-21 | 中国煤炭科工集团太原研究院有限公司 | Coil cable buffer device |
| CN112879391B (en) * | 2021-02-20 | 2023-04-18 | 潍柴动力股份有限公司 | Oil supplementing device and closed system |
| CN113404735A (en) * | 2021-06-22 | 2021-09-17 | 中煤科工集团重庆研究院有限公司 | Load-sensitive hydraulic system for adjusting inclination angle of drilling machine and working method of load-sensitive hydraulic system |
| CN114838026B (en) * | 2022-06-28 | 2022-10-25 | 中联重科股份有限公司 | Hydraulic rotation system control method and device for engineering machinery and engineering machinery |
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| CN110529448A (en) | 2019-12-03 |
| CN111649023A (en) | 2020-09-11 |
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