CN220816099U - Energy-saving integrated oil source block system - Google Patents

Abstract

The utility model discloses an energy-saving integrated oil source block system which comprises a main oil supply path, a steering oil path, a brake oil path and a pilot oil path, wherein the oil inlet end of the steering oil path is connected with the main oil supply path through a first pressure reducing valve, the oil inlet end of the brake oil path is connected with the main oil supply path through a second pressure reducing valve, the oil inlet end of the pilot oil path is connected with the main oil supply path through a third pressure reducing valve, and the oil outlet end of the brake oil path is connected with a brake element. Compared with the prior art, the utility model replaces the gas circuit with the brake oil circuit to control the brake element, and utilizes the stability and reliability of the hydraulic pressure to avoid the problem that the brake is easy to fail and improve the safety of the brake.

Description

Energy-saving integrated oil source block system

Technical Field

The utility model relates to the technical field of excavator hydraulic systems, in particular to an energy-saving integrated oil source block system.

Background

The excavator has the characteristics of convenience in transition, no damage to road surfaces and the like, and is widely applied to places such as engineering construction, municipal construction and the like. When the excavator finishes actions such as steering, swinging arms, soil digging and the like, the excavator mainly works by virtue of a hydraulic system, utilizes oil liquid as a working medium, and converts hydraulic energy into mechanical energy through hydraulic devices such as a hydraulic pump, a hydraulic cylinder, a hydraulic motor and the like, thereby realizing the actions. In the conventional excavator, the brake element is driven to brake the excavator mainly by a pneumatic driving mode. However, the adoption of the pneumatic driving mode not only requires the addition of a pneumatic pipeline, which leads to more complex overall driving system of the excavator, but also requires the installation of an air pump, an air storage tank and various brake valves, thereby further increasing the cost. In addition, the air circuit braking is easy to lose efficacy due to the fact that moisture exists in air, and braking safety is low.

In view of the above, the present inventors have made intensive studies to solve the above problems, and have made the present application.

Disclosure of Invention

The utility model mainly aims to provide an energy-saving integrated oil source block system which can effectively solve the problems that the air path is complex in structure and high in braking cost.

In order to achieve the above object, the solution of the present utility model is:

The utility model provides an energy-saving integrated oil source piece system, includes main oil feed way, turns to oil circuit, braking oil circuit and guide's oil circuit, turn to and be connected through first relief pressure valve between oil feed end and the main oil feed way of oil circuit, be connected through the second relief pressure valve between oil feed end and the main oil feed way of braking oil circuit, be connected through the third relief pressure valve between oil feed end and the main oil feed way of guide's oil feed end, the play oil end and the braking element of braking oil circuit are connected.

Furthermore, a liquid filling Ls oil way and an energy accumulator are arranged on the brake oil way, and a liquid filling Ls valve is arranged on the liquid filling Ls oil way.

Further, a throttle valve is arranged between the second pressure reducing valve and the energy accumulator.

Further, the outlet pressure of the first pressure reducing valve is greater than the outlet pressure of the second pressure reducing valve, which is greater than the outlet pressure of the third pressure reducing valve.

Further, a liquid supply pump is arranged at the liquid inlet end of the main oil supply way.

Furthermore, an overflow valve is arranged on the pilot oil path.

Compared with the prior art, the beneficial effects are that:

1. according to the utility model, the first pressure reducing valve, the second pressure reducing valve and the third pressure reducing valve are used for reducing the pressure of the high-pressure oil provided by the main oil supply path, so that the pressure in the steering oil path, the brake oil path and the steering oil path can meet the pressure requirement. In addition, the utility model can realize the liquid supply requirement by one pump, thereby greatly reducing the cost.

2. According to the utility model, the braking oil circuit is used for replacing the air circuit to control the braking element, the problem that braking is easy to fail is avoided by utilizing the stability and reliability of hydraulic pressure, and the braking safety is improved. And the air circuit elements such as an air pump, an air storage tank, a brake valve, a quick release valve and the like can be omitted, so that the cost and the expense are further saved. In addition, the air circuit drives the air compressor by using a belt, and the air storage tank stores certain air pressure, but various air valves have poor tightness, so that the energy loss is large; the utility model adopts hydraulic energy supply, and the second pressure reducing valve is used for reducing pressure, so that the energy is needed to be taken, the phenomenon of energy waste is avoided, and the utility model has the effect of more energy conservation.

3. The utility model ensures that the integral control system of the excavator is more integrated, the structure of the hydraulic control system is more compact, the structure arrangement of the hydraulic system is convenient, the energy can be stored for the energy accumulator when the energy is supplied, and the throttle valve is arranged between the energy accumulator and the outlet of the second pressure reducing valve, so that the time delay of the pressure filling is caused, and the purpose of fully storing the energy is achieved.

Drawings

Fig. 1 is a schematic view of an oil path structure of the present utility model.

In the figure:

Main oil supply passage 11, steering passage 12, brake passage 13, pilot passage 14,

A liquid charging Ls oil passage 15, a steering Ls oil passage 16, a multi-way valve Ls oil passage 17,

A first pressure reducing valve 21, a second pressure reducing valve 22, a third pressure reducing valve 23, an accumulator 3,

A charging Ls valve 4, a throttle valve 5 and a relief valve 6.

Detailed Description

In order to further explain the technical scheme of the utility model, the utility model is explained in detail by specific examples.

As shown in fig. 1, an energy-saving integrated oil source block system comprises a main oil supply path 11, a steering oil path 12, a brake oil path 13 and a pilot oil path 14, wherein an oil inlet end of the steering oil path 12 is connected with the main oil supply path 11 through a first pressure reducing valve 21, an oil inlet end of the brake oil path 13 is connected with the main oil supply path 11 through a second pressure reducing valve 22, an oil inlet end of the pilot oil path 14 is connected with the main oil supply path 11 through a third pressure reducing valve 23, an oil outlet end of the brake oil path 13 is connected with a brake element, the steering oil path 12 is connected with a steering gear, the pilot oil path 14 is connected with a hydraulic pilot system, and an oil supply pump is arranged at an oil inlet end of the main oil supply path 11. The outlet pressure of the first pressure reducing valve 21 is greater than the outlet pressure of the second pressure reducing valve 22, and the outlet pressure of the second pressure reducing valve 22 is greater than the outlet pressure of the third pressure reducing valve 23.

After the structure is adopted, the liquid supply pump conveys high-pressure oil to the steering oil path 12, the braking oil path 13 and the pilot oil path 14 through the main oil supply path 11, and the high-pressure oil is depressurized through the first depressurization valve 21, the second depressurization valve 22 and the third depressurization valve 23 before entering the steering oil path 12, the braking oil path 13 and the pilot oil path 14, so that the pressure in each oil path can meet the pressure requirement, and the steering control, the braking control and the pilot control of the excavator are realized. Compared with the prior art, the utility model uses the brake oil circuit 13 to replace the air circuit to control the brake element, so that the braking is more stable and reliable, and the braking safety is improved. And the brake oil way 13, the steering oil way 12 and the pilot oil way 14 are integrated integrally, so that the whole hydraulic system is more compact in structure, saves installation space and facilitates structural arrangement of the hydraulic system. In addition, only one liquid supply pump is needed to supply energy, so that a great amount of cost can be saved compared with gas circuit control, and meanwhile, the effect of saving more energy is achieved.

In the present embodiment, the brake oil passage 13 is provided with a liquid charge Ls oil passage 15 and the accumulator 3, and the liquid charge Ls oil passage 15 is provided with a liquid charge Ls valve 4. A throttle valve 5 is arranged between the second pressure reducing valve 22 and the accumulator 3. In operation, when the pressure of the accumulator 3 is lower than the spring pressure set in the liquid charging Ls valve 4, the oil pressure of the brake oil passage 13 is transferred to the liquid charging Ls oil passage 15, and the system selects the maximum oil pressure among the liquid charging Ls oil passage 15, the steering Ls oil passage 16 and the multi-way valve Ls oil passage 17 and feeds back the maximum oil pressure to the liquid supply pump, so that the liquid supply pump starts to supply oil, wherein the steering Ls oil passage is connected with the steering oil passage 12, and the multi-way valve Ls oil passage 17 is connected with the multi-way valve oil passage. Namely, when the pressure of the accumulator 3 is lower than the outlet pressure set by the second pressure reducing valve 22, the pressure of the brake oil path 13 is directly transmitted to the liquid charging Ls oil path 15, at the moment, the liquid supply pump starts to increase the discharge capacity, the accumulator 3 charges, and the throttle valve 5 is arranged between the outlet end of the second pressure reducing valve 22 and the accumulator 3, so that the pressure is full with time lag, and the purpose of full energy storage is achieved. Then, when the pressure of the accumulator 3 is higher than the spring pressure set in the liquid charge Ls valve 4, the liquid charge Ls valve 4 blocks the liquid charge Ls oil passage 15.

Preferably, since the oil pressure in the pilot oil passage 14 is small, the relief valve 6 is provided in the pilot oil passage 14 so as to protect the third relief valve 23, and when the oil pressure in the pilot oil passage 14 is too large, the relief valve 6 can introduce a part of oil into the return oil passage, thereby protecting overload and stabilizing the oil pressure in the pilot oil passage 14.

The above examples and drawings are not intended to limit the form or form of the present utility model, and any suitable variations or modifications thereof by those skilled in the art should be construed as not departing from the scope of the present utility model.

Claims (6)

1. The utility model provides an energy-saving integrated oil source piece system, its characterized in that includes main oil feed way, turns to oil circuit, braking oil circuit and guide's oil circuit, turn to and be connected through first relief pressure valve between oil feed end and the main oil feed way of oil circuit, be connected through the second relief pressure valve between oil feed end and the main oil feed way of braking oil circuit, be connected through the third relief pressure valve between oil feed end and the main oil feed way of guide's oil circuit, the play oil end and the brake element of braking oil circuit are connected.

2. The energy-saving integrated oil source block system according to claim 1, wherein a liquid-filling Ls oil path and an accumulator are arranged on the brake oil path, and a liquid-filling Ls valve is arranged on the liquid-filling Ls oil path.

3. The energy efficient integrated oil source block system according to claim 2, wherein a throttle valve is provided between the second pressure reducing valve and the accumulator.

4. The energy efficient integrated oil source block system of claim 1, wherein the outlet pressure of the first relief valve is greater than the outlet pressure of the second relief valve, and the outlet pressure of the second relief valve is greater than the outlet pressure of the third relief valve.

5. The energy-saving integrated oil source block system according to claim 1, wherein the liquid inlet end of the main oil supply path is provided with a liquid supply pump.

6. The energy efficient integrated oil source block system according to claim 5, wherein the pilot oil path is provided with an overflow valve.