CN115507076A - Time-delay brake control loop of rotary motor - Google Patents

Time-delay brake control loop of rotary motor Download PDF

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Publication number
CN115507076A
CN115507076A CN202211258624.4A CN202211258624A CN115507076A CN 115507076 A CN115507076 A CN 115507076A CN 202211258624 A CN202211258624 A CN 202211258624A CN 115507076 A CN115507076 A CN 115507076A
Authority
CN
China
Prior art keywords
brake
valve
oil
throttle valve
way
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211258624.4A
Other languages
Chinese (zh)
Inventor
许敬科
胡梦飞
周春伟
潘国俊
张严严
刘磊
薛峰
刘玉香
葛槟源
王永志
韦承中
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xuzhou Construction Machinery Group Co Ltd XCMG
Original Assignee
Xuzhou Construction Machinery Group Co Ltd XCMG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xuzhou Construction Machinery Group Co Ltd XCMG filed Critical Xuzhou Construction Machinery Group Co Ltd XCMG
Priority to CN202211258624.4A priority Critical patent/CN115507076A/en
Publication of CN115507076A publication Critical patent/CN115507076A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2221—Control of flow rate; Load sensing arrangements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20—Drives; Control devices
    • E02F9/22—Hydraulic or pneumatic drives
    • E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
    • E02F9/2267—Valves or distributors
    • 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
    • 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
    • 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
    • F15B13/027—Check valves

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

The invention discloses a delay brake control loop of a rotary motor, which comprises: the hydraulic brake system comprises an oil tank, a main pump, a reversing valve, a one-way throttle valve, an energy accumulator and a brake oil cylinder; the brake cylinder includes: the one-way throttle valve is used for one-way throttling, accelerating hydraulic oil to enter the rod cavity, delaying the return of the hydraulic oil in the rod cavity to the oil tank, and the energy accumulator is used for delaying the return of the hydraulic oil in the rod cavity to the oil tank; the rod cavity is connected with an outlet of the one-way throttle valve, the energy accumulator is connected with an outlet of the one-way throttle valve, an inlet of the one-way throttle valve is connected with a working oil port of the reversing valve, a main oil return port of the reversing valve is connected with an oil tank through a connecting oil tank, and a main oil inlet of the reversing valve is connected with the oil tank through a main pump. The invention provides a novel hydraulic system design method for machinery needing time-delay braking, improves the time-delay braking effect, improves the operation comfort of operators, effectively protects the brake, and prolongs the service life of the brake.

Description

Time-delay brake control loop of rotary motor
Technical Field
The invention discloses a delay brake control loop of a rotary motor, and relates to the technical field of engineering machinery control.
Background
In engineering machinery such as an excavator, a crane and the like which need to rotate, when the rotation is finished, the rotation speed reducer can continuously rotate due to the action of inertia to drive the motor to rotate, at the moment, the motor is changed into a pump, the rotation is stopped by consuming energy, and then the brake cavity presses a friction plate of the speed reducer under the action of a spring force to brake the rotation mechanism;
the braking scheme in the prior art is shown in figure 1, when the machinery needs to perform rotary operation, the two-position three-way electromagnetic valve is electrified, the pump supplies oil to a braking cavity in the rotary speed reducer to release rotary braking, and at the moment, the machinery can be subjected to rotary operation; when machinery needs to perform rotary braking, the two-position three-way electromagnetic valve is powered off, oil in a braking cavity in the rotary speed reducer returns to the oil tank through the throttle valve, the braking cavity presses a friction plate of the speed reducer under the action of spring force at the moment, and braking on the rotary mechanism is completed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a delay brake control loop of a rotary motor, which delays the return of hydraulic oil in a rod cavity to an oil tank and improves the delay brake effect.
In order to realize the purpose, the technical scheme adopted by the invention is as follows: a rotary motor delayed brake control circuit comprising: the system comprises an oil tank, a main pump, a reversing valve, a one-way throttle valve, a brake oil cylinder and an energy accumulator; the brake cylinder include: a rod cavity and a spring brake cavity are arranged,
the main pump is used for providing driving force for working of hydraulic oil;
the reversing valve is used for controlling the on-off of the oil entering the brake oil cylinder;
the one-way throttle valve is used for one-way throttling, accelerating hydraulic oil to enter the rod cavity and delaying the hydraulic oil in the rod cavity to return to the oil tank;
the accumulator is used for delaying the hydraulic oil in the rod cavity to return to the oil tank and increasing the delay time of the rotary braking;
the rod cavity is connected with the outlet of the one-way throttle valve, the inlet of the one-way throttle valve is connected with the working oil port of the reversing valve, the main oil return port of the reversing valve is connected with the oil tank through a main pump, and the main oil inlet of the reversing valve is connected with the oil tank through a main pump.
Further, the direction valve includes: two-position three-way electromagnetic valve.
Furthermore, the outlet of the main pump is connected with a relief valve, and the relief valve is used for limiting the maximum pressure of the outlet of the pump.
Furthermore, the brake oil cylinder is a normally closed brake oil cylinder, the rotary motor is directly braked and locked when no pressure oil acts on the brake oil cylinder, and a transmission shaft of the rotary motor is connected with a rotary speed reducer.
Furthermore, when the reversing valve is electrified, the reversing valve is switched to the left position, and the one-way valve of the one-way throttle valve is opened; the pressure oil is supplied to the rod cavity of the brake oil cylinder and the energy accumulator through the reversing valve and the one-way throttle valve, the spring force in the brake cavity is overcome, the piston rod of the brake oil cylinder retracts, and the brake locking of the rotary motor is released.
Furthermore, when the reversing valve is powered off, the reversing valve returns to the right position, the spring in the spring brake cavity of the brake oil cylinder resets, the one-way valve of the one-way throttle valve is closed, hydraulic oil in the rod cavity flows back to the oil tank through the throttle valve of the one-way throttle valve and the reversing valve, and meanwhile the energy accumulator provides oil for the brake cavity, so that the reset time of the spring in the brake cavity is prolonged.
Further, the one-way throttle valve comprises in parallel: the inlet of the one-way valve is connected with a working oil port of the reversing valve, the outlet of the one-way valve is connected with a rod cavity of the brake oil cylinder, and the one-way orifice is used for conducting in the forward direction, quickly relieving braking and throttling in the reverse direction to delay braking
Furthermore, when the delay time of the rotary brake is less than the expected delay time, the volume of the energy accumulator can be increased or the throttle opening of the one-way throttle valve can be reduced;
further, when the delay time of the swing brake is longer than the expected extension time, the volume of the accumulator can be reduced or the throttle opening of the one-way throttle valve can be increased.
Furthermore, a plunger is slidably connected in a rod cavity of the brake oil cylinder, a spring connected with the plunger is arranged in a spring brake cavity, and the tail end of the plunger is connected with a transmission shaft of a rotary speed reducer of a rotary motor through a brake piece.
Has the advantages that: the invention provides a novel hydraulic system design method for machinery needing time-delay braking, improves the time-delay braking effect, improves the operation comfort of operators, effectively protects the brake, and prolongs the service life of the brake.
Drawings
FIG. 1 is a schematic diagram of a prior art control loop;
FIG. 2 is a schematic diagram of a control loop of the present invention.
Detailed Description
The following describes the implementation of the technical solution in further detail with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
One embodiment as shown in fig. 2: a rotary motor delayed brake control circuit comprising: the system comprises an oil tank 1, a main pump 2, a reversing valve 3, a one-way throttle valve 4, a brake oil cylinder 7 and an energy accumulator 8; the brake cylinder 7 includes: the reversing valve 3 adopts a two-position three-way electromagnetic valve;
an oil inlet of a main pump 2 is connected with an oil tank 1, an oil outlet of the main pump 2 is connected with a main oil inlet (port P) of a two-position three-way electromagnetic valve 3, a main oil return port (port T) of the two-position three-way electromagnetic valve 3 is connected with the oil tank 1, a working oil port (port B) of the two-position three-way electromagnetic valve 3 is connected with an oil inlet of a one-way throttle valve 4, the oil inlet of the one-way throttle valve comprises a throttle valve inlet and a one-way valve inlet which are connected in parallel, the oil outlet of the one-way throttle valve 4 is respectively connected with a rod cavity and an energy accumulator 8 of a brake oil cylinder 7, and the oil outlet of the one-way throttle valve 4 comprises a throttle valve outlet and a one-way valve outlet which are connected in parallel; the oil outlet of the main pump is also connected with an overflow valve 9; oil from the two-position three-way electromagnetic valve 3 flows to the energy accumulator 8 and the brake oil cylinder 7 through the one-way throttle valve,
the brake oil cylinder 7 is a normally closed brake oil cylinder, directly brakes and locks the rotary motor 5 when no pressure oil acts on the rotary motor, and a transmission shaft of the rotary motor 5 is connected with a rotary speed reducer 6.
When the reversing valve 3 is electrified, the reversing valve 3 is switched to the left position, the main oil inlet (port P) is communicated with the working oil port (port B), and the one-way valve of the one-way throttle valve 4 is opened; the pressure oil supplies oil to a rod cavity of the brake oil cylinder 7 and the energy accumulator 8 through the reversing valve 3 and the one-way throttle valve 4, overcomes the spring force of a brake spring brake cavity, retracts a piston rod of the brake oil cylinder 7, and releases the brake locking of the rotary motor.
When the reversing valve is in power failure, the reversing valve 3 returns to the right position, a main oil return port (T port) is communicated with a working oil port (B port), a spring in a spring brake cavity of the brake oil cylinder 7 is reset, a one-way valve of the one-way throttle valve 4 is closed, a piston rod of the brake oil cylinder 7 extends out under the action of the spring, hydraulic oil in the rod cavity flows back to an oil tank through the throttle valve of the one-way throttle valve 4 and the reversing valve 3, meanwhile, the energy accumulator 8 provides oil for the brake cavity, the reset time of the spring in the brake cavity is prolonged, and after a period of time, the front end of the piston rod presses a friction plate of the speed reducer to complete braking on the swing mechanism.
The one-way throttle valve 4 comprises, in parallel: the inlet of the one-way valve is connected with a working oil port of the reversing valve, the outlet of the one-way valve is connected with a rod cavity of the brake oil cylinder, and the one-way orifice is used for conducting in the forward direction, quickly relieving braking and throttling in the reverse direction to delay braking;
when the delay time of the swing brake is less than the desired delay time, the volume of the accumulator 8 can be increased or the throttle opening of the one-way throttle valve 4 can be reduced;
when the delay time of the swing brake is longer than the desired extension time, the volume of the accumulator 8 may be reduced or the throttle opening of the one-way throttle valve 4 may be increased.
The brake cylinder 7 is internally provided with a movable column in sliding connection, a spring connected with the movable column is arranged in the spring brake cavity, and the tail end of the movable column is connected with a transmission shaft of the rotary speed reducer 6 through a brake part.
The invention provides a novel hydraulic system design method for machinery needing delay braking, improves the delay braking effect, improves the operation comfort of operators, effectively protects the brake and prolongs the service life of the brake.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A delayed brake control circuit for a rotary motor, comprising: the hydraulic brake system comprises an oil tank (1), a main pump (2), a reversing valve (3), a one-way throttle valve (4), a brake oil cylinder (7) and an energy accumulator (8); the brake cylinder (7) comprises: a rod cavity and a spring brake cavity, a brake oil cylinder (7) is used for braking the rotary motor (5),
the hydraulic oil pump is characterized in that the rod cavity is connected with an outlet of a one-way throttle valve (4), an energy accumulator (8) is connected with an outlet of the one-way throttle valve (4), an inlet of the one-way throttle valve (4) is connected with a working oil port of a reversing valve (3), a main oil return port of the reversing valve (3) is connected with an oil tank (1), and a main oil inlet of the reversing valve (3) is connected with the oil tank (1) through a main pump (2).
2. A rotary motor delayed brake control circuit according to claim 1, wherein said change valve (3) comprises: two-position three-way solenoid valve.
3. A delay brake control circuit of a rotary motor according to claim 1, wherein the outlet of the main pump (2) is connected with a relief valve (9), and the outlet of the relief valve (9) is connected with the oil tank (1).
4. The delay brake control circuit of a rotary motor according to claim 1, wherein the brake cylinder (7) is a normally closed brake cylinder, and directly brakes and locks the rotary motor (5) when no pressure oil is applied, and a rotary speed reducer (6) is connected to a transmission shaft of the rotary motor (5).
5. A delay brake control circuit of a swing motor according to claim 1, wherein when the direction switching valve (3) is energized, the direction switching valve (3) is switched to the left position, and the check valve of the check throttle valve (4) is opened; the pressure oil is supplied to a rod cavity of the brake oil cylinder (7) and the energy accumulator (8) through the reversing valve (3) and the one-way throttle valve (4), so that a piston rod of the brake oil cylinder (7) retracts, and the brake locking of the rotary motor is released.
6. The delay brake control circuit of a rotary motor according to claim 1, wherein when the reversing valve is de-energized, the reversing valve (3) returns to the right position, the spring in the spring brake chamber of the brake cylinder (7) is reset, the check valve of the check throttle valve (4) is closed, the hydraulic oil in the rod chamber flows back to the oil tank after passing through the throttle valve of the check throttle valve (4) and the reversing valve (3), and the accumulator (8) supplies oil to the brake chamber to prolong the reset time of the spring in the brake chamber.
7. A delayed brake control circuit of a swing motor according to claim 1, wherein the one-way throttle valve (4) comprises, in parallel: the brake oil cylinder is characterized by comprising a one-way valve and a one-way throttling hole, wherein the inlet of the one-way valve is connected with a working oil port of the reversing valve (3), the outlet of the one-way valve is connected with a rod cavity of the brake oil cylinder (7), and the one-way throttling hole is used for conducting in the forward direction, rapidly relieving braking and throttling in the reverse direction, so that braking is delayed.
8. A swing motor delayed brake control circuit according to claim 1, wherein when the delay time of the swing brake of the swing motor (5) is less than the desired extension time, the accumulator (8) volume is increased or the throttle opening of the check throttle valve (4) is decreased.
9. A swing motor delay brake control circuit according to claim 1, wherein when the delay time of the swing brake of the swing motor (5) is longer than a desired extension time, the volume of the accumulator (8) is reduced or the throttle opening of the one-way throttle valve (4) is increased.
10. A delay brake control circuit of a rotary motor according to claim 1, wherein the rod chamber of the brake cylinder (7) is slidably connected with a plunger, a spring connected with the plunger is arranged in the spring brake chamber, and the end of the plunger is connected with the transmission shaft of the rotary speed reducer (6) through a brake member.
CN202211258624.4A 2022-10-14 2022-10-14 Time-delay brake control loop of rotary motor Pending CN115507076A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211258624.4A CN115507076A (en) 2022-10-14 2022-10-14 Time-delay brake control loop of rotary motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211258624.4A CN115507076A (en) 2022-10-14 2022-10-14 Time-delay brake control loop of rotary motor

Publications (1)

Publication Number Publication Date
CN115507076A true CN115507076A (en) 2022-12-23

Family

ID=84510516

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202211258624.4A Pending CN115507076A (en) 2022-10-14 2022-10-14 Time-delay brake control loop of rotary motor

Country Status (1)

Country Link
CN (1) CN115507076A (en)

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