CN206290504U - A kind of large-scale steel grasping machine hydraulic gyration energy conserving system - Google Patents

Abstract

The utility model discloses a hydraulic rotary energy-saving system for a large steel grabbing machine, which comprises a pilot gear pump, a hydraulic motor, a constant power variable pump and an accumulator. An electromagnetic reversing valve is installed on the delivery pipeline, and the constant power variable pump pumps oil from the oil tank and sends it to the three-way six-position reversing valve, and then divides into two circuits, one positive and one reverse, to supply oil to the hydraulic motor and the two supply oil. A hydraulically controlled one-way valve is respectively arranged on the pipeline, and the output pipeline of each hydraulically controlled one-way valve is also connected with the accumulator through a two-position two-way reversing valve and a hydraulically controlled one-way valve in turn, and the pilot gear The pump also sends oil to pilot control valve 1 and pilot control valve 2 and controls the reversing action of the three-way six-position reversing valve through the two. The utility model has simple structure, low equipment configuration cost, and can realize energy recovery and reuse.

Description

A hydraulic rotary energy-saving system for a large steel grabber

technical field

The utility model relates to a hydraulic rotary energy-saving system of a large-scale steel grabbing machine, which is a device for recovering and reusing the energy lost during overflow and braking of the rotary platform of the steel grabbing machine, and belongs to the field of construction machinery.

Background technique

For large-scale construction machinery, such as large-scale hydraulic steel grabbers, due to their large consumption, high fuel consumption, and poor emissions, they have gradually become one of the objects of general concern in the field of energy conservation and environmental protection. The rotary platform of the hydraulic steel grab machine needs to be started, rotated and braked frequently, and the platform will lose a lot of energy in each cycle of work. Especially during the braking process, due to the large inertia of the rotary platform, a large amount of energy is lost.

After reviewing the patents on energy saving in the rotation of the steel grabber, there is a patent document with a publication number of CN104372823 that provides an excavator rotation braking energy recovery system. Energy recovery is achieved by controlling the actions of accumulators, variable displacement pumps, rotary motors and other components, and energy reuse is achieved by controlling the energy distribution of the engine and accumulator power sources. However, this system needs to add control valve group, pressure sensor unit and ECU control unit on the basis of traditional excavator slewing mechanism, the structure is complex and the cost of pressure sensor components and ECU unit is high.

Therefore, users hope to simplify the structure and reduce the equipment configuration cost.

Utility model content

The purpose of the invention of the utility model is to provide a hydraulic rotary energy-saving system for a large-scale steel-grabbing machine in view of the above-mentioned problems. And the stored energy will be released when the turntable starts next time, so as to realize the reuse of energy.

The technical scheme that the utility model adopts is such:

A hydraulic rotary energy-saving system for a large-scale steel grabber, including a fuel tank, a pilot gear pump, a hydraulic motor, a brake device, and an electromagnetic reversing valve. The pilot gear pump pumps oil from the fuel tank and delivers it to the brake device An electromagnetic reversing valve is set on the road, which also includes a constant power variable pump and an accumulator. The constant power variable pump pumps oil from the fuel tank and sends it to the three-way six-position reversing valve, and then divides into two circuits, one positive and the other reversed. The hydraulic motor supplies oil, and the hydraulic control check valve 2 is set on the forward oil supply pipeline, and the hydraulic control check valve 1 is set on the reverse oil supply pipeline, and the output pipeline of the hydraulic control check valve 1 also passes through the two positions in turn. The two-way reversing valve 1 and the hydraulic control check valve 3 are connected with the accumulator, and the output pipeline of the hydraulic control check valve 2 also passes through the 2-position 2-way reversing valve 2, the hydraulic control check valve 4 and the accumulator in sequence. The accumulator is connected, and the pilot gear pump also delivers oil to pilot control valve 1 and pilot control valve 2 and controls the reversing action of the three-way six-position reversing valve through the two.

Preferably, the pipeline between the pilot gear pump, pilot control valve 1 and pilot control valve 2 is also connected with a pilot relief valve.

As a preference, there is a pipeline between the input pipeline of the hydraulic control check valve 1 and the input pipeline of the hydraulic control check valve 2, and the electric control overflow valve 1 and the electric control overflow valve 1 are arranged in series on the pipeline. Control overflow valve 2 and each of them has a check valve connected in parallel with it on the pipeline. Electric control overflow valve 1 and electronic control overflow valve 2 collect the pipeline oil pressure of the accumulator through sensors to determine whether to overflow.

Preferably, the oil pipeline leading to the three-way six-position reversing valve from the constant power variable pump is also connected to a main relief valve.

Preferably, the pipeline between the hydraulically controlled one-way valve three and the accumulator and the pipeline between the hydraulically controlled one-way valve four and the accumulator are also jointly connected with an overflow valve.

Preferably, the input pipeline of the hydraulic control check valve 1 and the input pipeline of the hydraulic control check valve 2 are respectively connected to a pipeline provided with a check valve.

The overflow valves are set in the above-mentioned preferred modes, which can play a role of constant pressure overflow and safety protection for the corresponding pipelines.

The input pipeline of the hydraulic control check valve 1 and the input pipeline of the hydraulic control check valve 2 are respectively connected to an emergency oil tank through a pipeline with a check valve. When the oil tank of the main oil supply is short of oil, the oil in the emergency oil tank can be used to support for a period of time, and the oil in the emergency oil tank is automatically delivered to the motor under the negative pressure of the pipeline.

To sum up, due to the adoption of the above technical solution, the beneficial effect of the utility model is that by using various hydraulic components and accumulators on the basis of the original hydraulic slewing system, energy recovery and reuse can be realized. Simple, low equipment configuration cost.

Description of drawings

Fig. 1 is a schematic diagram of the utility model.

Marks in the figure: 1 is the oil tank, 2 is the constant power variable pump, 3 is the pilot gear pump, 4 is the pilot control valve 1, 5 is the pilot control valve 2, 6 is the three-way six-position reversing valve, 7 is the hydraulic control single Directional valve 1, 8 is electric control relief valve 1, 9 is electric control relief valve 2, 10 is hydraulic control check valve 2, 11 is 2-position 2-way reversing valve, 12 is hydraulic control check valve 3, 13 is an accumulator, 14 is a hydraulic control check valve four, 15 is a two-position two-way reversing valve two, 16 is a hydraulic motor, 17 is a brake device, and 18 is an electromagnetic reversing valve.

detailed description

Below in conjunction with accompanying drawing, the utility model is described in detail.

Best practice:

As shown in Figure 1, a hydraulic rotary energy-saving system for a large-scale steel grabber includes a fuel tank 1, a pilot gear pump 3, a hydraulic motor 16, a brake device 17, and an electromagnetic reversing valve 18. The oil is pumped in the middle and delivered to the brake device 17, and an electromagnetic reversing valve 18 is set on the delivery pipeline. It also includes a constant power variable pump 2 and an accumulator 13. The constant power variable pump 2 draws oil from the oil tank 1 and delivers to the three-way six-position reversing valve 6, and then divided into two circuits, one forward and one reverse, to supply oil to the hydraulic motor 16. A hydraulic control check valve 2 10 is set on the forward oil supply pipeline, and a hydraulic control check valve 10 is set on the reverse oil supply pipeline. One-way valve one 7, the output pipeline of said hydraulic control one-way valve one-7 also communicates with accumulator 13 through two-position two-way reversing valve one 11, three hydraulic control one-way valves 12 in turn, said hydraulic control The output pipeline of the check valve 2 10 also communicates with the accumulator 13 through the 2-position 2-way reversing valve 2 15 and the hydraulic control check valve 4 14 in turn, and the pilot gear pump 3 also delivers oil to the pilot control valve 1 4. The pilot control valve 2 5 controls the reversing action of the three-way six-position reversing valve 6 through the two.

The pipeline between the pilot gear pump 3 and the first pilot control valve 4 and the second pilot control valve 5 is also connected with a pilot relief valve.

There is also a pipeline between the input pipeline of the hydraulic control check valve one 7 and the input pipeline of the hydraulic control check valve two 10, and an electric control overflow valve one 8 and an electric valve are arranged in series on the pipeline. control overflow valve 2 9 and each of them has a check valve connected in parallel with it on the pipeline, the electric control overflow valve 1 8 and the electric control overflow valve 2 9 collect the pipeline oil pressure of the accumulator 13 through the sensor to determine whether overflow action. When the slewing platform is started, the control overflow valve 2 9 is opened when judging that the accumulator 13 does not need to recover energy, and the oil passes through the output pipeline of the hydraulic control check valve 4 14, the electric control overflow valve 2 9, and the electric Control overflow valve-8 parallel one-way valves return to the oil tank. When the slewing platform starts in the reverse direction, the control overflow valve 18 will open when it judges that the accumulator 13 does not need to recover energy, and the oil will pass through the output pipeline of the hydraulic control check valve 3 12, the electric control overflow valve 18, The one-way valve connected in parallel with the electric control overflow valve 9 is returned to the oil tank.

The oil pipeline from the constant power variable pump 2 to the three-way six-position reversing valve 6 is also connected to a main relief valve.

The pipeline between the hydraulically controlled one-way valve three 12 and the accumulator 13 and the pipeline between the hydraulically controlled one-way valve four 14 and the accumulator 13 are also jointly connected with an overflow valve.

The input pipeline of the first hydraulic control check valve 7 and the input pipeline of the second hydraulic control check valve 10 are respectively connected with a pipeline provided with a check valve.

In the above technical scheme, the hydraulically controlled one-way valve one 7, the electric control overflow valve one 8, the electric control overflow valve two 9, the hydraulically controlled one-way valve 10, the two-position four-way reversing valve one 11, the hydraulically controlled one-way valve Valve three 12, hydraulic control one-way valve four 14, and two-position four-way reversing valve two 15 respectively transmit their working parameters to the central control device through sensors, and the central control device performs state control.

The input pipeline of the first hydraulic control check valve 7 and the input pipeline of the second hydraulic control check valve 10 are also respectively connected to an emergency oil tank through a pipeline with a check valve.

When the slewing platform starts, a part of the oil provides power for the motor 16, and the other part of the oil flows through the hydraulic control check valve 2 10, the 2-position 2-way reversing valve 2 15, and the hydraulic check valve 4 14 to recover and enter the accumulator 13. Among them, the electric control overflow valve 2 9, the hydraulic control check valve 2 10, the 2-position 2-way reversing valve 2 15, and the hydraulic check valve 4 14 are controlled by the central control equipment, and the rest of the hydraulic components are in the normally closed state.

When the slewing platform brakes, the brake device 17 starts, and the oil enters the accumulator 13 from the motor 16 through the two-position two-way reversing valve one 11 and the hydraulic control check valve three 12. During this process, the electromagnetic overflow Valve one 8, two-position four-way reversing valve one 11, and hydraulic control check valve three 12 are controlled by the central control device, and the rest of the hydraulic components are in the normally closed state.

When the slewing platform starts in the reverse direction, both the accumulator 13 and the constant power variable pump 1 provide oil to the motor 16, and the oil output by the constant power variable pump passes through the three-way six-position reversing valve 6, the hydraulic control check valve One 7 supplies oil to the motor 13, and the oil output from the accumulator 13 supplies oil to the motor 13 through the hydraulic control check valve three 12 and the two-position two-way reversing valve one 11. During this process, the hydraulic control check valve The first 7 and the second are the four-way reversing valve 11 and the hydraulic control check valve 3 and the electric control overflow valve 8 are controlled by the central control device, and the rest of the hydraulic components are in the normally closed state.

The driver operates pilot control valve 14 and pilot control valve 15 to control the working state of the three-position six-way reversing valve 6, and the central control device can adjust the working state of the three-position six-way reversing valve 6 The size of the spool opening enables the motor speed to reach the expected speed quickly and stably.

Claims (7)

1. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system, including fuel tank（1）, guide's gear pump（3）, hydraulic motor（16）、 Band brake apparatus（17）And solenoid directional control valve（18）, guide's gear pump（3）From fuel tank（1）Middle oil pumping is simultaneously transported to band brake apparatus （17）And solenoid directional control valve is set on transfer pipeline（18）, it is characterised in that：Also include variable displacement with constant power pump（2）, accumulator （13）, the variable displacement with constant power pump（2）From fuel tank（1）Middle oil pumping is simultaneously transported to the position switching valve of threeway six（6）, it is then divided into two-way A positive and a negative ground is hydraulic motor（16）Fuel feeding, sets hydraulic control one-way valve two on positive oil feed line（10）, reverse oil feed line Upper setting hydraulic control one-way valve one（7）, the hydraulic control one-way valve one（7）Output pipe also pass sequentially through bi-bit bi-pass reversal valve one （11）, hydraulic control one-way valve three（12）With accumulator（13）Connection, the hydraulic control one-way valve two（10）Output pipe also lead to successively Cross bi-bit bi-pass reversal valve two（15）, hydraulic control one-way valve four（14）With accumulator（13）Connection, guide's gear pump（3）To also Oil is transported to pilot-actuated valve one（4）, pilot-actuated valve two（5）And the position switching valve of threeway six is controlled by the two（6）Commutation Action.

2. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system according to claim 1, it is characterised in that：Guide's tooth Wheel pump（3）With pilot-actuated valve one（4）, pilot-actuated valve two（5）Between pipeline on be also connected with a precursor overflow valve.

3. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system according to claim 1, it is characterised in that：The hydraulic control list To valve one（7）Intake line and the hydraulic control one-way valve two（10）Intake line between also have a pipeline, on the pipeline It has been arranged in series automatically controlled overflow valve one（8）With automatically controlled overflow valve two（9）And the two respectively have a check valve with its on pipeline simultaneously Connection, automatically controlled overflow valve one（8）With automatically controlled overflow valve two（9）Accumulator is gathered by sensor（13）Pipeline oil pressure decide whether Overflow is acted.

4. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system according to claim 1, it is characterised in that:The invariable power Variable pump（2）Lead to the position switching valve of threeway six（6）Pipeline road also have a main overflow valve to connect.

5. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system according to claim 1, it is characterised in that：The hydraulic control list To valve three（12）With accumulator（13）Between pipeline and the hydraulic control one-way valve four（14）With accumulator（13）Between pipe Road is also connected with an overflow valve jointly.

6. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system according to claim 1, it is characterised in that：The hydraulic control list To valve one（7）Intake line and hydraulic control one-way valve two（10）Intake line also respectively with a pipeline for being provided with check valve It is connected.

7. a kind of large-scale steel grasping machine hydraulic gyration energy conserving system according to claim 1, it is characterised in that：The hydraulic control list To valve one（7）Intake line and the hydraulic control one-way valve two（10）Intake line also each by the pipeline with check valve It is connected with an emergency tank.