CN215444559U

CN215444559U - Energy-saving loader hydraulic system

Info

Publication number: CN215444559U
Application number: CN202121079465.2U
Authority: CN
Inventors: 谭伟俊; 陈永强; 王淑; 吴承鑫; 徐彩莲
Original assignee: Lonking Shanghai Machinery Manufacturing Co Ltd
Current assignee: Lonking Shanghai Machinery Manufacturing Co Ltd
Priority date: 2021-05-19
Filing date: 2021-05-19
Publication date: 2022-01-07
Anticipated expiration: 2031-05-19

Abstract

The utility model discloses an energy-saving loader hydraulic system which is characterized by comprising a hydraulic oil tank assembly, wherein the hydraulic oil tank assembly is connected with a steering hydraulic system, a working hydraulic system and a control confluence energy-saving system through an oil absorption filter element and an oil return filter element; the steering hydraulic system comprises a steering pump, a priority valve, a steering gear assembly and a steering oil cylinder, wherein an oil outlet of the steering pump is connected with an oil inlet of the priority valve and is also connected with a second electromagnetic valve; the working hydraulic system comprises a working pump, a multi-way reversing valve, a movable arm oil cylinder and a rotary impact oil cylinder, wherein an oil outlet of the working pump is communicated with an oil inlet of the multi-way reversing valve and is simultaneously connected with a first electromagnetic valve, and the multi-way reversing valve is respectively communicated with large and small oil inlets of the movable arm oil cylinder and the rotary impact oil cylinder. The utility model can effectively reduce the power loss of the hydraulic system and reduce the fuel consumption in a standby condition or a transportation state.

Description

Energy-saving loader hydraulic system

Technical Field

The utility model relates to an energy-saving loader hydraulic system, in particular to an energy-saving quantitative confluence hydraulic system.

Background

A majority of domestic loaders adopt a quantitative pump hydraulic system, the system comprises a quantitative pump, a steering gear, a priority valve (flow amplification valve), a steering oil cylinder, a multi-way valve reversing valve, a rotary bucket, a movable arm oil cylinder and other component assemblies, and the hydraulic system is low in energy utilization rate. The displacement of the pump is a fixed value, the flow of the system is only related to the rotating speed of the engine, and when the loader is independently steered, except the required flow, most of the flow returns to the oil tank through a middle position of the multi-way reversing valve at a certain back pressure to cause energy loss; in the working process, when the load pressure is greater than the system pressure, the system flow returns to the oil tank at a certain unloading pressure, and high-pressure overflow loss is generated. In the transportation process, the hydraulic system does not work, but the flow of the system still passes through a middle position oil return tank of the multi-way reversing valve at a certain back pressure, so that energy loss is caused. The quantitative hydraulic system has large power loss and large fuel consumption.

The overseas current loader mainly comprises a fully variable hydraulic system, wherein the hydraulic system comprises a variable pump, a load sensitive steering gear, a flow amplifying valve, a steering oil cylinder, a load sensitive multi-way valve, a rotating bucket, a movable arm oil cylinder and the like. The hydraulic oil cylinder has the advantages of small function loss, low fuel consumption and the defects that the manufacturing cost of related hydraulic elements is high, the system pressure is high, the requirements on the processing of other related elements are high, and the requirements on the cleanliness of the system are high.

Disclosure of Invention

The technical problem to be solved by the utility model is as follows: a special energy-saving quantitative confluence hydraulic system is developed.

In order to solve the technical problems, the technical scheme of the utility model is to provide an energy-saving loader hydraulic system which is characterized by comprising a hydraulic oil tank assembly, wherein the hydraulic oil tank assembly is connected with a steering hydraulic system, a working hydraulic system and a control confluence energy-saving system through an oil absorption filter element and an oil return filter element; the steering hydraulic system comprises a steering pump, a priority valve, a steering gear assembly and a steering oil cylinder, wherein an oil outlet of the steering pump is connected with an oil inlet of the priority valve and is also connected with a second electromagnetic valve; the working hydraulic system comprises a working pump, a multi-way reversing valve, a movable arm oil cylinder and a rotary impact oil cylinder, wherein an oil outlet of the working pump is communicated with oil inlets of the multi-way reversing valve and is simultaneously connected with a first electromagnetic valve, and the multi-way reversing valve is respectively communicated with large and small oil inlets of the movable arm oil cylinder and the rotary impact oil cylinder; the control confluence energy-saving system comprises a microswitch, a steering angle sensor, a logic operation control box and an electromagnetic valve.

Preferably, the oil outlet of the oil absorption filter element is connected with the oil inlets of the steering pump and the working pump.

Preferably, the oil return filter element is connected with the cooler module, and the cooler module is connected with the second electromagnetic valve and the microswitch.

Preferably, the control confluence energy-saving system comprises a microswitch, a steering angle sensor, a logic operation control box and an electromagnetic valve, an oil path of the steering pump is connected to the electromagnetic valve II, an oil path of the working pump is connected to the electromagnetic valve II, signal lines of the microswitch, the steering microswitch and the control electromagnetic valve are connected with the logic operation control box, and the other end of the steering microswitch is connected with the steering shaft.

When the hydraulic system of the loader turns independently, an angle sensor connected to a steering shaft of a steering gear sends a signal to control the electromagnetic valve of a steering pump to lose power, a microswitch for controlling a distribution valve is powered on at the moment, the steering pump normally runs, and redundant oil of the steering pump and working pump oil are unloaded through the powered electromagnetic valve; if the working hydraulic system works independently, the main valve core micro switch sends a signal to control the two electromagnetic valves to lose power, and the oil path is the same as the hydraulic system of the constant delivery pump of the normal loader; if the steering system and the working system work simultaneously, the main valve core micro switch sends a signal to control the two electromagnetic valves to lose power, and the oil path is the same as the hydraulic system of the constant delivery pump of the normal loader; it can be seen from the above that, the working pump and the steering pump are in the state of confluence and low-pressure unloading as required by the on-off of the electromagnetic valve, and the hydraulic oil at the pump port can directly return to the oil tank, so that the power of the hydraulic system reaches the minimum value, at the moment, the energy can be saved, and meanwhile, the engine provides more power for the transmission system.

The utility model has the characteristics that:

the power loss of the hydraulic system can be effectively reduced under the standby condition or the transportation state, and the fuel consumption is reduced.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Detailed Description

In order to make the utility model more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

As shown in fig. 1, an energy-saving hydraulic system of a loader is characterized by comprising a hydraulic oil tank assembly 13, wherein the hydraulic oil tank assembly 13 is connected with a steering hydraulic system, a working hydraulic system and a control confluence energy-saving system through an oil absorption filter element 1 and an oil return filter element 12; the steering hydraulic system comprises a steering pump 2, a priority valve 4, a steering gear assembly 5 and a steering oil cylinder 6, wherein an oil outlet of the steering pump 2 is connected with an oil inlet of the priority valve 4 and is simultaneously connected with a second electromagnetic valve 18, an oil outlet of the priority valve 4 is connected with an oil inlet of the steering gear assembly 5, and the steering gear assembly 5 is connected with the steering oil cylinder 6; the working hydraulic system comprises a working pump 8, a multi-way reversing valve 7, a movable arm oil cylinder 10 and a rotary impact oil cylinder 9, wherein an oil outlet of the working pump 8 is communicated with an oil inlet of the multi-way reversing valve 7 and is simultaneously connected with a first electromagnetic valve 3, and the multi-way reversing valve 7 is respectively communicated with large and small oil inlets of the movable arm oil cylinder 10 and the rotary impact oil cylinder 9; the control confluence energy-saving system comprises a microswitch 16, a steering angle sensor 17, a logic operation control box 15 and an electromagnetic valve, wherein an oil outlet of an oil absorption filter core 1 is connected with oil inlets of a steering pump 2 and a working pump 8, an oil return filter core 12 is connected with a cooler module 11, the cooler module 11 is connected with a second electromagnetic valve 18 and the microswitch 16, the control confluence energy-saving system comprises the microswitch 16, the steering angle sensor 17, the logic operation control box 15 and the electromagnetic valve, an oil way of the steering pump 2 is connected to the second electromagnetic valve 18, an oil way of the working pump 8 is connected to the second electromagnetic valve 3, the microswitch 16, the steering microswitch 17 and a signal line of the control electromagnetic valve are connected with the logic operation control box 15, and the other end of the steering microswitch 17 is connected with a steering shaft 14.

The specific working process is as follows: when the hydraulic system of the loader turns independently, a steering angle sensor 17 connected to a steering shaft 14 of a steering gear sends a signal to control the electromagnetic valve of the steering pump 2 to lose power, and a microswitch 16 for controlling a distribution valve is powered on at the moment, so that the steering pump operates normally, and redundant oil of the steering pump 2 and working pump oil are unloaded through the powered electromagnetic valve; if the working hydraulic system works independently, the microswitch 16 switch of the main valve core sends a signal to control the two electromagnetic valves to lose power, and the oil path is the same as the hydraulic system of the constant delivery pump of the normal loader; if the steering system and the working system work simultaneously, the microswitch 16 of the main valve core sends a signal to control the two electromagnetic valves to lose power, and the oil path is the same as the hydraulic system of the constant delivery pump of the normal loader; it can be seen from the above that, the working pump and the steering pump are in the state of confluence and low-pressure unloading as required by the on-off of the electromagnetic valve, and the hydraulic oil at the pump port can directly return to the oil tank, so that the power of the hydraulic system reaches the minimum value, at the moment, the energy can be saved, and meanwhile, the engine provides more power for the transmission system.

The working principle of the quantitative confluence hydraulic system is as follows:

1. the idle speed of the whole machine has no action working condition: because the steering hydraulic system and the working hydraulic system have no signals, the logical operation control box 15 controls the first electromagnetic valve 3 and the second electromagnetic valve 18 to be electrified, oil of the steering pump 2 and the working pump 8 directly returns to the oil tank through the first electromagnetic valve 3, and the hydraulic oil does not pass through the priority valve 4 and the multi-way reversing valve 7, so that the pressure loss is reduced, and the pump ports of the steering pump and the working pump maintain a very low pressure.

2. The transportation working condition of the whole machine is as follows: because the steering and working hydraulic systems have no signals, the logical operation control box 15 controls the first electromagnetic valve 3 and the second electromagnetic valve 18 to be electrified, oil of the steering pump 2 and the working pump 8 directly returns to the oil tank through the electromagnetic valve 3, and the hydraulic oil does not pass through the priority valve 4 and the multi-way reversing valve 7, so that the pressure loss is reduced, and a very low pressure is maintained at the ports of the steering pump and the working pump.

3. The independent steering working condition is as follows: because the angle sensor of turning to has the signal, control box 15 control second 18 of solenoid valve lose the electricity, and first 3 of solenoid valve is electrified, and the oil circuit of the steering system supplies oil according to conventional system, and surplus fluid directly reaches first 3 of solenoid valve to return to the oil tank after the priority valve, and the working pump maintains a very low pressure.

3. The independent working condition is as follows: because the steering angle sensor has no signal and the microswitch of the working system sends a signal, the logic operation control box 15 controls the first electromagnetic valve 3 and the second electromagnetic valve 18 to lose power at the same time, and the oil path supplies oil according to a conventional system, namely the oil of the steering pump flows into the working system after passing through the priority valve.

4. The working conditions of steering and working are simultaneously operated: because the steering angle sensor and the microswitch of the distribution valve of the working hydraulic system send signals simultaneously, the logic operation control box 15 controls the first electromagnetic valve 3 and the second electromagnetic valve 18 to lose power simultaneously, the oil path supplies oil according to a conventional system, namely, the residual oil of the steering pump flows into the working system after passing through the priority valve.

Claims

1. An energy-saving loader hydraulic system is characterized by comprising a hydraulic oil tank assembly (13), wherein the hydraulic oil tank assembly (13) is connected with a steering hydraulic system, a working hydraulic system and a control confluence energy-saving system through an oil absorption filter element (1) and an oil return filter element (12); the steering hydraulic system comprises a steering pump (2), a priority valve (4), a steering gear assembly (5) and a steering oil cylinder (6), wherein an oil outlet of the steering pump (2) is connected with an oil inlet of the priority valve (4) and is simultaneously connected with a second electromagnetic valve (18), an oil outlet of the priority valve (4) is connected with an oil inlet of the steering gear assembly (5), and the steering gear assembly (5) is connected with the steering oil cylinder (6); the working hydraulic system comprises a working pump (8), a multi-way reversing valve (7), a movable arm oil cylinder (10) and a rotary impact oil cylinder (9), an oil outlet of the working pump (8) is communicated with an oil inlet of the multi-way reversing valve (7) and is connected with a first electromagnetic valve (3), and the multi-way reversing valve (7) is respectively communicated with large and small oil inlets of the movable arm oil cylinder (10) and the rotary impact oil cylinder (9); the control confluence energy-saving system comprises a microswitch (16), a steering angle sensor (17), a logic operation control box (15) and an electromagnetic valve.

2. An energy-saving hydraulic system of a loader as claimed in claim 1, characterized in that the oil outlet of the oil suction filter element (1) is connected with the oil inlets of the steering pump (2) and the working pump (8).

3. An energy-saving hydraulic system of a loader as claimed in claim 1 characterized in that the oil return filter element (12) is connected to the cooler block (11), and the cooler block (11) is connected to the second solenoid valve (18) and the microswitch (16).

4. The energy-saving hydraulic system of a loader as claimed in claim 1, characterized in that the control confluence energy-saving system comprises a microswitch (16), a steering angle sensor (17), a logic operation control box (15) and an electromagnetic valve, the oil circuit of the steering pump (2) is connected to a second electromagnetic valve (18), the oil circuit of the working pump (8) is connected to a second electromagnetic valve (3), the microswitch (16), the steering microswitch (17) and the control electromagnetic valve signal line are connected with the logic operation control box (15), and the other end of the steering microswitch (17) is connected with the steering shaft (14).