A dual engine dual multi-way valve hydraulic system

Abstract

This utility model discloses a dual-engine, dual-multi-way valve hydraulic system, including a first engine, a first main pump, a first multi-way valve, a second engine, a second main pump, and a second multi-way valve. The first engine is connected to one end of the first main pump, and the other end of the first main pump is connected to one end of the first multi-way valve. The second engine is connected to one end of the second main pump, and the other end of the second main pump is connected to one end of the second multi-way valve. The other ends of the first and second multi-way valves merge externally, allowing hydraulic oil to enter the cylinder. A first shut-off valve is installed between the first main pump and the first multi-way valve, and a second shut-off valve is installed between the second main pump and the second multi-way valve. By adding shut-off valves to the pipeline, when a single engine fails to start due to a malfunction, the system effectively prevents hydraulic oil from flowing back to the main pump, solving the corresponding main pump reversal problem and protecting the safety and stability of the entire hydraulic system.

Description

Technical Field

[0001] This utility model relates to a dual-engine dual-multi-way valve hydraulic system, belonging to the technical field of hydraulic excavators. Background Technology

[0002] Typically, hydraulic excavators use a single-engine power system, where one engine can meet all the excavator's operating needs. However, with the increasing demands for mining efficiency and the growing size of excavators, several manufacturers have developed dual-engine hydraulic excavators, powered by two engines. When one engine fails to start, the entire machine will be driven by only one engine. In this situation, the hydraulic oil output from the main pump driven by the normal engine flows through the confluence line to the main pump driven by the failed engine, causing it to reverse, damaging its internal structure, and affecting the safety and reliability of the entire hydraulic system. Therefore, an effective solution to this problem is urgently needed. Utility Model Content

[0003] The present invention aims to provide a dual-engine dual-multi-way valve hydraulic system, which prevents the main pump from reversing and effectively improves the safety and reliability of the entire hydraulic system.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is: a dual-engine dual-multi-way valve hydraulic system, the system comprising a first engine, a first main pump, a first multi-way valve, a second engine, a second main pump, and a second multi-way valve; the first engine is connected to one end of the first main pump, and the other end of the first main pump is connected to one end of the first multi-way valve; the second engine is connected to one end of the second main pump, and the other end of the second main pump is connected to one end of the second multi-way valve; the other ends of the first multi-way valve and the other ends of the second multi-way valve merge externally, allowing hydraulic oil to enter the cylinder; a first shut-off valve is provided between the first main pump and the first multi-way valve, and a second shut-off valve is provided between the second main pump and the second multi-way valve.

[0005] The dual-engine, dual-multi-way valve hydraulic system provided by this utility model can prevent the main pump from reversing, protect hydraulic components, and improve the safety and reliability of the entire hydraulic system.

[0006] Based on the embodiments of this utility model, further optimizations can be made to this utility model. The optimized technical solutions are as follows:

[0007] In one preferred embodiment, the first shut-off valve is a check valve or a switching valve; and / or the second shut-off valve is a check valve or a switching valve.

[0008] Compared with the prior art, the beneficial effects of this utility model are: the dual-engine dual-multi-way valve hydraulic system provided by this utility model can effectively prevent hydraulic oil from flowing back to the main pump when a single engine fails to start due to a malfunction, thus solving the corresponding main pump reversal problem and protecting the safety and stability of the entire hydraulic system. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of an existing dual-engine, dual-multi-way valve hydraulic system;

[0010] Figure 2 This is a schematic diagram of a dual-engine, dual-multi-way valve hydraulic system according to an embodiment of the present invention. Detailed Implementation

[0011] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0012] Example 1

[0013] like Figure 1 The diagram shows the schematic of a mainstream dual-engine, dual-main-pump, dual-multi-way valve hydraulic system: two engines drive main pump 1 and main pump 2 respectively, supplying multi-way valve 1 and multi-way valve 2. After confluence with the external valves, the hydraulic oil enters the cylinder, driving the actuator to perform the designated action. When one engine malfunctions and cannot operate, the entire hydraulic system operates in single-engine mode. The hydraulic oil enters one of the multi-way valves through the normally operating main pump. At this time, some hydraulic oil will enter the non-operating main pump through the confluence line, which can easily cause the main pump to reverse, damaging the internal structure and compromising the reliability of the entire hydraulic system.

[0014] like Figure 2 The diagram shown is a schematic of a dual-engine, dual-pump, dual-valve hydraulic system according to Embodiment 1 of this utility model. Unlike conventional dual-engine, dual-pump, dual-valve hydraulic systems, this hydraulic system adds a shut-off valve (e.g., a switching valve or a check valve) between the main pump and the multi-way valve pipeline. When one of the engines fails to start, the shut-off valve cuts off the main pump oil circuit on the faulty engine side, preventing the main pump from reversing and protecting the reliability of the hydraulic components and the entire hydraulic system.

[0015] The above embodiments should be understood as being used only to illustrate the present invention more clearly, and not to limit the scope of the present invention. After reading the present invention, any modifications of the embodiments by those skilled in the art in various equivalent forms fall within the scope defined by the appended claims.

Claims

1. A dual-engine dual-multi-way valve hydraulic system, the system comprising a first engine, a first main pump, a first multi-way valve, a second engine, a second main pump, and a second multi-way valve; the first engine is connected to one end of the first main pump, and the other end of the first main pump is connected to one end of the first multi-way valve; the second engine is connected to one end of the second main pump, and the other end of the second main pump is connected to one end of the second multi-way valve; the other end of the first multi-way valve and the other end of the second multi-way valve merge externally, allowing hydraulic oil to enter the cylinder; Its features are, A first shut-off valve is set between the first main pump and the first multi-way valve, and a second shut-off valve is set between the second main pump and the second multi-way valve.

2. The dual-engine dual-multi-way valve hydraulic system according to claim 1, characterized in that, The first shut-off valve is a check valve or a switching valve; and / or the second shut-off valve is a check valve or a switching valve.

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