阅读说明：本技术 一种利用飞轮储能的工程机械回转制动能量回收系统 (engineering machinery slewing braking energy recovery system utilizing flywheel to store energy ) 是由 李建松 周波 吉智 黎少辉 徐昆鹏 吴冉 于 2019-07-26 设计创作，主要内容包括：一种利用飞轮储能的工程机械回转制动能量回收系统,主换向阀的A口和B口分别与回转马达的A口和B口连接；主换向阀的A口和B口分别通过第一和第二溢流阀与油箱连接；第一和第二补油单向阀的进油口与油箱连接,出油口分别与回转马达的A口和B口连接；回转马达通过减速器、回转支承、与转台连接；第二和第三单向阀的进油口分别与主换向阀的A口和B口连接；第二和第三单向阀的出油口均与切换阀的P口连接,切换阀的A口通过缓冲阀与油箱连接；旁通阀的A口和P口分别与回转马达的A口和B口连接；辅助齿轮与回转支承连接；辅助齿轮依次通过第一变速箱和第一离合器与飞轮连接。该系统能一体化地实现对回转制动能量的回收和再利用过程。(a kind of engineering machinery that utilizes flywheel to store energy turns back the energy recovery system of brake, A port and B port of the main reversal valve are connected with A port and B port of the rotary motor separately; the port A and the port B of the main reversing valve are respectively connected with an oil tank through a first overflow valve and a second overflow valve; oil inlets of the first oil supplementing one-way valve and the second oil supplementing one-way valve are connected with an oil tank, and oil outlets of the first oil supplementing one-way valve and the second oil supplementing one-way valve are respectively connected with an opening A and an opening B of the rotary motor; the rotary motor is connected with the rotary table through a speed reducer and a rotary support; oil inlets of the second check valve and the third check valve are respectively connected with an opening A and an opening B of the main reversing valve; oil outlets of the second one-way valve and the third one-way valve are both connected with a port P of the switching valve, and a port A of the switching valve is connected with the oil tank through a buffer valve; the port A and the port P of the bypass valve are respectively connected with the port A and the port B of the rotary motor; the auxiliary gear is connected with the slewing bearing; the auxiliary gear is connected with the flywheel through the first gearbox and the first clutch in sequence. The system can integrally realize the recovery and reutilization process of the rotary braking energy.)

1. An engineering machinery rotary braking energy recovery system utilizing flywheel energy storage comprises an engine (1), a rotary hydraulic pump (2), a main reversing valve (4), a main overflow valve (12), a first overflow valve (701), a second overflow valve (702), a first oil supplementing one-way valve (801), a second oil supplementing one-way valve (802), a rotary motor (5), a rotary table (11) and an operating handle for operating the rotary table (11) to move, wherein the engine (1) is coaxially connected with the rotary hydraulic pump (2), and an S port and a P port of the rotary hydraulic pump (2) are respectively connected with an oil tank (6) and an oil inlet of the first one-way valve (3); a port P and a port T of the main reversing valve (4) are respectively connected with an oil outlet of the first one-way valve (3) and the oil tank (6); the port A and the port B of the main reversing valve (4) are respectively connected with the port A and the port B of the rotary motor (5); the port A and the port B of the main reversing valve (4) are also connected with an oil tank (6) through a first overflow valve (701) and a second overflow valve (702) respectively; an oil inlet of the first oil supplementing one-way valve (801) and an oil inlet of the second oil supplementing one-way valve (802) are both connected with the oil tank (6), and an oil outlet of the first oil supplementing one-way valve (801) and an oil outlet of the second oil supplementing one-way valve (802) are respectively connected with an A port and a B port of the rotary motor (5);

The rotary motor (5) is connected with a speed reducer (9), a driving gear on the speed reducer (9) is meshed with a gear ring in an inner race of the rotary support (10), and an outer race of the rotary support (10) is fixedly connected with the rotary table (11);

the rotary table is characterized by further comprising a second one-way valve (1801), a third one-way valve (1802), a bypass valve (17), an auxiliary gear (13), a rotating speed sensor for detecting the rotating speed of the rotary table (11) and a controller;

An oil inlet of the second one-way valve (1801) and an oil inlet of the third one-way valve (1802) are respectively connected with a port A and a port B of the main reversing valve (4); an oil outlet of the second one-way valve (1801) and an oil outlet of the third one-way valve (1802) are both connected with a port P of the switching valve (19), and a port A of the switching valve (19) is connected with the oil tank (6) through a buffer valve (20);

The port A and the port P of the bypass valve (17) are respectively connected with the port A and the port B of the rotary motor (5);

the auxiliary gear (13) is meshed with a gear ring in an inner race of the slewing bearing (10), a transmission shaft in the center of the auxiliary gear (13) is connected with the input end of a first gearbox (1401), and the output end of the first gearbox (1401) is connected with a flywheel (16) through a first clutch (1501);

The input end of the controller is connected with the signal output ends of the operating handle and the rotating speed sensor, and the input end of the controller is respectively connected with the rotary hydraulic pump (2), the main reversing valve (4), the bypass valve (17), the switching valve (19), the first gearbox (1401), the rotating speed sensor and the first clutch (1501).

2. The swing braking energy recovery system for engineering machinery utilizing flywheel energy storage is characterized by further comprising a main overflow valve (12), wherein a port P of the swing hydraulic pump (2) is connected with the oil tank (6) through the main overflow valve (12).

3. the engineering machinery rotary braking energy recovery system utilizing flywheel energy storage is characterized by comprising an engine (1), a rotary hydraulic pump (2), a main reversing valve (4), a main overflow valve (12), a first overflow valve (701), a second overflow valve (702), a first oil supplementing one-way valve (801), a second oil supplementing one-way valve (802), a rotary motor (5), a rotary table (11) and an operating handle for operating the rotary table (11) to move, wherein the engine (1) is coaxially connected with the rotary hydraulic pump (2), and an S port and a P port of the rotary hydraulic pump (2) are respectively connected with an oil inlet of an oil tank (6) and an oil inlet of the first one-way valve (3); a port P and a port T of the main reversing valve (4) are respectively connected with an oil outlet of the first one-way valve (3) and the oil tank (6); the port A and the port B of the main reversing valve (4) are respectively connected with the port A and the port B of the rotary motor (5); the port A and the port B of the main reversing valve (4) are also connected with an oil tank (6) through a first overflow valve (701) and a second overflow valve (702) respectively; an oil inlet of the first oil supplementing one-way valve (801) and an oil inlet of the second oil supplementing one-way valve (802) are both connected with the oil tank (6), and an oil outlet of the first oil supplementing one-way valve (801) and an oil outlet of the second oil supplementing one-way valve (802) are respectively connected with an A port and a B port of the rotary motor (5);

The rotary motor (5) is connected with a speed reducer (9), a driving gear on the speed reducer (9) is meshed with a gear ring in an inner race of the rotary support (10), and an outer race of the rotary support (10) is fixedly connected with the rotary table (11);

The rotary table is characterized by further comprising a second one-way valve (1801), a third one-way valve (1802), a bypass valve (17), an auxiliary gear (13), a rotating speed sensor for detecting the rotating speed of the rotary table (11) and a controller;

An oil inlet of the second one-way valve (1801) and an oil inlet of the third one-way valve (1802) are respectively connected with a port A and a port B of the main reversing valve (4); an oil outlet of the second one-way valve (1801) and an oil outlet of the third one-way valve (1802) are both connected with a port P of the switching valve (19), and a port A of the switching valve (19) is connected with the oil tank (6) through a buffer valve (20);

The port A and the port P of the bypass valve (17) are respectively connected with the port A and the port B of the rotary motor (5);

the auxiliary gear (13) is meshed with a gear ring in an inner race of the slewing bearing (10), a transmission shaft in the center of the auxiliary gear (13) is connected with the input end of a first gearbox (1401), the output end of the first gearbox (1401) is connected with one end of a flywheel (16) through a first clutch (1501), the other end of the flywheel is connected with an auxiliary hydraulic pump (21) through a second clutch (1502), an S port of the auxiliary hydraulic pump (21) is connected with an oil tank (6), and a P port of the auxiliary hydraulic pump (21) is connected with a P port of a main reversing valve (4) through a fourth one-way valve (1803);

the input end of the controller is connected with the signal output ends of the operating handle and the rotating speed sensor, and the input end of the controller is respectively connected with the rotary hydraulic pump (2), the main reversing valve (4), the bypass valve (17), the switching valve (19), the first gearbox (1401), the rotating speed sensor, the first clutch (1501), the second clutch (1502) and the auxiliary hydraulic pump (21).

4. The swing braking energy recovery system of engineering machinery utilizing flywheel for energy storage is characterized by further comprising a main overflow valve (12), wherein a port P of the swing hydraulic pump (2) is connected with the oil tank (6) through the main overflow valve (12).

5. the engineering machinery rotary braking energy recovery system utilizing flywheel energy storage is characterized by comprising an engine (1), a rotary hydraulic pump (2), a main reversing valve (4), a main overflow valve (12), a first overflow valve (701), a second overflow valve (702), a first oil supplementing one-way valve (801), a second oil supplementing one-way valve (802), a rotary motor (5), a rotary table (11) and an operating handle for operating the rotary table (11) to move, wherein the engine (1) is coaxially connected with the rotary hydraulic pump (2), and an S port and a P port of the rotary hydraulic pump (2) are respectively connected with an oil inlet of an oil tank (6) and an oil inlet of the first one-way valve (3); a port P and a port T of the main reversing valve (4) are respectively connected with an oil outlet of the first one-way valve (3) and the oil tank (6); the port A and the port B of the main reversing valve (4) are respectively connected with the port A and the port B of the rotary motor (5); the port A and the port B of the main reversing valve (4) are also connected with an oil tank (6) through a first overflow valve (701) and a second overflow valve (702) respectively; an oil inlet of the first oil supplementing one-way valve (801) and an oil inlet of the second oil supplementing one-way valve (802) are both connected with the oil tank (6), and an oil outlet of the first oil supplementing one-way valve (801) and an oil outlet of the second oil supplementing one-way valve (802) are respectively connected with an A port and a B port of the rotary motor (5);

the rotary motor (5) is connected with a speed reducer (9), a driving gear on the speed reducer (9) is meshed with a gear ring in an inner race of the rotary support (10), and an outer race of the rotary support (10) is fixedly connected with the rotary table (11);

The rotary table is characterized by further comprising a second one-way valve (1801), a third one-way valve (1802), a bypass valve (17), an auxiliary gear (13), a rotating speed sensor for detecting the rotating speed of the rotary table (11) and a controller;

an oil inlet of the second one-way valve (1801) and an oil inlet of the third one-way valve (1802) are respectively connected with a port A and a port B of the main reversing valve (4); an oil outlet of the second one-way valve (1801) and an oil outlet of the third one-way valve (1802) are both connected with a port P of the switching valve (19), and a port A of the switching valve (19) is connected with the oil tank (6) through a buffer valve (20);

The port A and the port P of the bypass valve (17) are respectively connected with the port A and the port B of the rotary motor (5);

the auxiliary gear (13) is meshed with a gear ring in an inner race of the slewing bearing (10), a transmission shaft in the center of the auxiliary gear (13) is connected with the input end of a first gearbox (1401), the output end of the first gearbox (1401) is connected with one end of a flywheel (16) through a first clutch (1501), the other end of the flywheel is connected with the input end of a second gearbox (1402) through a second clutch (1502), and the output end of the second gearbox (1402) is coaxially connected with the slewing hydraulic pump (2);

The input end of the controller is connected with the signal output ends of the operating handle and the rotating speed sensor, and the input end of the controller is respectively connected with the rotary hydraulic pump (2), the main reversing valve (4), the bypass valve (17), the switching valve (19), the first gearbox (1401), the second gearbox (1402), the rotating speed sensor, the first clutch (1501) and the second clutch (1502).

6. The swing braking energy recovery system of engineering machinery utilizing flywheel energy storage is characterized by further comprising a main overflow valve (12), wherein a port P of the swing hydraulic pump (2) is connected with the oil tank (6) through the main overflow valve (12).

Technical Field

The invention belongs to the technical field of hydraulic transmission, and particularly relates to an engineering machinery rotary braking energy recovery system utilizing flywheel energy storage.

background

the turning action is widely applied to various engineering machines and is used for realizing the operation of equipment in a certain space, and typical engineering machines comprise a hydraulic excavator, a crane, a rotary drilling rig and the like.

When the engineering machinery is braked in a rotary mode, the rotary motor cannot stop rotating immediately due to inertia force, the rotary motor continues to rotate and compresses oil at an oil outlet, short-time high pressure is generated at the oil outlet of the rotary motor, and the oil overflows from an overflow valve, so that the braking effect is achieved. Taking an excavator as an example, in a typical work cycle of an excavator, the swing motor needs to be started and braked twice. Under the long-time work, the energy wasted by the braking overflow of the rotary motor is very huge, if the kinetic energy of the rotary table during braking can be recovered, the energy consumption of an engine can be reduced, and the energy utilization efficiency is improved.

Disclosure of Invention

In view of the problems in the prior art, the invention provides an engineering machinery rotary braking energy recovery system utilizing flywheel energy storage, which can switch the working modes according to different working conditions, can realize recovery and reuse of braking energy, can also realize the working point adjustment of an engine, can enable the engine to work in a high-efficiency area, and can improve the energy utilization efficiency of the system.

In order to achieve the purpose, the invention provides an engineering machinery rotary braking energy recovery system utilizing flywheel energy storage, which comprises an engine, a rotary hydraulic pump, a main reversing valve, a main overflow valve, a first overflow valve, a second overflow valve, a first oil supplementing one-way valve, a second oil supplementing one-way valve, a rotary motor, a rotary table and an operating handle for operating the rotary table to move, wherein the engine is coaxially connected with the rotary hydraulic pump, and an S port and a P port of the rotary hydraulic pump are respectively connected with an oil tank and an oil inlet of the first one-way valve; the port P and the port T of the main reversing valve are respectively connected with an oil outlet of the first one-way valve and an oil tank; the port A and the port B of the main reversing valve are respectively connected with the port A and the port B of the rotary motor; the port A and the port B of the main reversing valve are also connected with an oil tank through a first overflow valve and a second overflow valve respectively; an oil inlet of the first oil supplementing one-way valve and an oil inlet of the second oil supplementing one-way valve are both connected with an oil tank, and an oil outlet of the first oil supplementing one-way valve and an oil outlet of the second oil supplementing one-way valve are respectively connected with an opening A and an opening B of the rotary motor;

The rotary motor is connected with a speed reducer, a driving gear on the speed reducer is meshed with a gear ring in an inner race of the rotary support, and the outer race of the rotary support is fixedly connected with the rotary table;

The rotary table further comprises a second one-way valve, a third one-way valve, a bypass valve, an auxiliary gear, a rotary speed sensor for detecting the rotary speed of the rotary table and a controller;

the oil inlet of the second one-way valve and the oil inlet of the third one-way valve are respectively connected with the port A and the port B of the main reversing valve; an oil outlet of the second one-way valve and an oil outlet of the third one-way valve are both connected with a port P of the switching valve, and a port A of the switching valve is connected with the oil tank through a buffer valve;

the port A and the port P of the bypass valve are respectively connected with the port A and the port B of the rotary motor;

the auxiliary gear is meshed with a gear ring in an inner race of the slewing bearing, a transmission shaft at the center of the auxiliary gear is connected with the input end of a first gearbox, and the output end of the first gearbox is connected with a flywheel through a first clutch;

The input end of the controller is connected with the signal output ends of the operating handle and the rotating speed sensor, and the input end of the controller is respectively connected with the rotary hydraulic pump, the main reversing valve, the bypass valve, the switching valve, the first gearbox, the rotating speed sensor and the first clutch.

furthermore, in order to limit the maximum working pressure of the hydraulic pump, the hydraulic pump further comprises a main overflow valve, and the P port of the rotary hydraulic pump is connected with the oil tank through the main overflow valve.

the invention also provides an engineering machinery rotary braking energy recovery system utilizing flywheel energy storage, which comprises an engine, a rotary hydraulic pump, a main reversing valve, a main overflow valve, a first overflow valve, a second overflow valve, a first oil supplementing one-way valve, a second oil supplementing one-way valve, a rotary motor, a rotary table and an operating handle for operating the rotary table to move, wherein the engine is coaxially connected with the rotary hydraulic pump, and an S port and a P port of the rotary hydraulic pump are respectively connected with an oil tank and an oil inlet of the first one-way valve; the port P and the port T of the main reversing valve are respectively connected with an oil outlet of the first one-way valve and an oil tank; the port A and the port B of the main reversing valve are respectively connected with the port A and the port B of the rotary motor; the port A and the port B of the main reversing valve are also connected with an oil tank through a first overflow valve and a second overflow valve respectively; an oil inlet of the first oil supplementing one-way valve and an oil inlet of the second oil supplementing one-way valve are both connected with an oil tank, and an oil outlet of the first oil supplementing one-way valve and an oil outlet of the second oil supplementing one-way valve are respectively connected with an opening A and an opening B of the rotary motor;

The rotary motor is connected with a speed reducer, a driving gear on the speed reducer is meshed with a gear ring in an inner race of the rotary support, and the outer race of the rotary support is fixedly connected with the rotary table;

the rotary table further comprises a second one-way valve, a third one-way valve, a bypass valve, an auxiliary gear, a rotary speed sensor for detecting the rotary speed of the rotary table and a controller;

The oil inlet of the second one-way valve and the oil inlet of the third one-way valve are respectively connected with the port A and the port B of the main reversing valve; an oil outlet of the second one-way valve and an oil outlet of the third one-way valve are both connected with a port P of the switching valve, and a port A of the switching valve is connected with the oil tank through a buffer valve;

The port A and the port P of the bypass valve are respectively connected with the port A and the port B of the rotary motor;

The auxiliary gear is meshed with a gear ring in an inner race of the slewing bearing, a transmission shaft at the center of the auxiliary gear is connected with the input end of a first gearbox, the output end of the first gearbox is connected with one end of a flywheel through a first clutch, the other end of the flywheel is connected with an auxiliary hydraulic pump through a second clutch, an S port of the auxiliary hydraulic pump is connected with an oil tank, and a P port of the auxiliary hydraulic pump is connected with a P port of a main reversing valve through a fourth one-way valve;

the input end of the controller is connected with the signal output ends of the operating handle and the rotating speed sensor, and the input end of the controller is respectively connected with the rotary hydraulic pump, the main reversing valve, the bypass valve, the switching valve, the first gearbox, the rotating speed sensor, the first clutch, the second clutch and the auxiliary hydraulic pump.

furthermore, in order to limit the maximum working pressure of the hydraulic pump, the hydraulic pump further comprises a main overflow valve, and the P port of the rotary hydraulic pump is connected with the oil tank through the main overflow valve.

the invention also provides an engineering machinery rotary braking energy recovery system utilizing flywheel energy storage, which comprises an engine, a rotary hydraulic pump, a main reversing valve, a main overflow valve, a first overflow valve, a second overflow valve, a first oil supplementing one-way valve, a second oil supplementing one-way valve, a rotary motor, a rotary table and an operating handle for operating the rotary table to move, wherein the engine is coaxially connected with the rotary hydraulic pump, and an S port and a P port of the rotary hydraulic pump are respectively connected with an oil tank and an oil inlet of the first one-way valve; the port P and the port T of the main reversing valve are respectively connected with an oil outlet of the first one-way valve and an oil tank; the port A and the port B of the main reversing valve are respectively connected with the port A and the port B of the rotary motor; the port A and the port B of the main reversing valve are also connected with an oil tank through a first overflow valve and a second overflow valve respectively; an oil inlet of the first oil supplementing one-way valve and an oil inlet of the second oil supplementing one-way valve are both connected with an oil tank, and an oil outlet of the first oil supplementing one-way valve and an oil outlet of the second oil supplementing one-way valve are respectively connected with an opening A and an opening B of the rotary motor;

The rotary motor is connected with a speed reducer, a driving gear on the speed reducer is meshed with a gear ring in an inner race of the rotary support, and the outer race of the rotary support is fixedly connected with the rotary table;

the rotary table further comprises a second one-way valve, a third one-way valve, a bypass valve, an auxiliary gear, a rotary speed sensor for detecting the rotary speed of the rotary table and a controller;

the oil inlet of the second one-way valve and the oil inlet of the third one-way valve are respectively connected with the port A and the port B of the main reversing valve; an oil outlet of the second one-way valve and an oil outlet of the third one-way valve are both connected with a port P of the switching valve, and a port A of the switching valve is connected with the oil tank through a buffer valve;

The port A and the port P of the bypass valve are respectively connected with the port A and the port B of the rotary motor;

The auxiliary gear is meshed with a gear ring in an inner race of the slewing bearing, a transmission shaft at the center of the auxiliary gear is connected with the input end of a first gearbox, the output end of the first gearbox is connected with one end of a flywheel through a first clutch, the other end of the flywheel is connected with the input end of a second gearbox through a second clutch, and the output end of the second gearbox is coaxially connected with the slewing hydraulic pump;

The input end of the controller is connected with the signal output ends of the operating handle and the rotating speed sensor, and the input end of the controller is respectively connected with the rotary hydraulic pump, the main reversing valve, the bypass valve, the switching valve, the first gearbox, the second gearbox, the rotating speed sensor, the first clutch and the second clutch.

Furthermore, in order to limit the maximum working pressure of the hydraulic pump, the hydraulic pump further comprises a main overflow valve, and the P port of the rotary hydraulic pump is connected with the oil tank through the main overflow valve.

The invention can effectively recover and recycle the rotation braking energy of the excavator on the premise of not influencing the rotation action performance. Compared with an energy recovery scheme which directly uses a rotary motor as an energy conversion element, the scheme directly recovers energy by using the flywheel, so that links of energy conversion are reduced, and the improvement of energy efficiency is facilitated. Under necessary conditions, the energy recovery system can be separated from the original rotary system, and the system is the same as the traditional system, so that the normal use of the system can be effectively prevented from being influenced when the recovery system breaks down. When the original rotary system of the equipment breaks down, the energy recovery system can be used as a rotary system in an emergency mode, and the safe operation of the equipment is guaranteed.

The energy recovery system can also absorb redundant engine power, so that the engine can work in a high-efficiency area as much as possible, and the peak clipping and valley filling effects on the output power of the engine are realized. The invention can be used in engineering machinery with a slewing mechanism such as an excavator, a crane, a rotary drilling rig and the like and other similar hydraulic equipment.

drawings

FIG. 1 is a hydraulic schematic of a conventional excavator swing system;

FIG. 2 is a hydraulic schematic of a first embodiment of the present invention;

FIG. 3 is a hydraulic schematic of a second embodiment of the present invention;

Fig. 4 is a hydraulic schematic of a third embodiment of the present invention.

in the figure: 1. the hydraulic control system comprises an engine, 2, a rotary hydraulic pump, 3, a first check valve, 4, a main reversing valve, 5, a rotary motor, 6, an oil tank, 701, a first overflow valve, 702, a second overflow valve, 801, a first oil supplementing check valve, 802, a second oil supplementing check valve, 9, a speed reducer, 10, a rotary support, 11, a rotary table, 12, a main overflow valve, 13, an auxiliary gear, 1401, a first gearbox, 1402, a second gearbox, 1501, a first clutch, 1502, a second clutch, 16, a flywheel, 17, a bypass valve, 1801, a second check valve, 1802, a third check valve, 1803, a fourth check valve, 19, a switching valve, 20, a buffer valve, 21 and an auxiliary hydraulic pump.

Detailed Description

The present invention will be further described with reference to the following examples.