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a fluid machine

A technology of fluid machinery and overflow pressure, which is applied in the direction of liquid variable displacement machinery, mechanical equipment, variable displacement engines, etc., can solve the problems of high cost, application restrictions, complex structure, etc., and achieve multiple functions, simple structure, and control high precision effect

Active Publication Date: 2018-01-16
XUZHOU HEAVY MASCH CO LTD
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Problems solved by technology

[0007] However, in the prior art, most swash plate axial piston pumps or motors only have a corresponding single function, that is, the pump can only realize the function of the pump, and the motor can only realize the function of the motor, and cannot be used in pump working conditions and motor working conditions. The energy recovery function cannot be realized; or although some hydraulic components that can switch between the pump working condition and the motor working condition have appeared, the structures of these existing hydraulic components are generally more complicated and the cost is relatively high. High, and its control effect is not ideal, for example, the proportional displacement control function of the pump, the proportional displacement control function of the motor and the constant pressure cut-off control function of the pump cannot be realized at the same time, resulting in the poor performance of the existing products of this type, and the application is limited. Larger limit

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Embodiment Construction

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work fall within the protection scope of the present invention.

[0041] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification.

[0042] In the description of the present invention, it shou...

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Abstract

The invention relates to the technical field of engineering machinery, in particular to a fluid machine. The fluid machine provided by the present invention includes a fluid machine body, a first driving device, a second driving device, and a working condition control assembly, wherein the working condition control assembly includes a first reversing valve, a first adjusting mechanism, and a second adjusting mechanism , where the first reversing valve cooperates with the first regulating mechanism to realize the pump proportional displacement control function, and the first reversing valve cooperates with the second regulating mechanism to realize the pump constant pressure cut-off control function and the motor proportional displacement control function. The fluid machine provided by the present invention can be used not only as a pump but also as a motor, has the function of energy recovery, and can simultaneously realize the pump proportional Displacement control function, motor proportional displacement control function and pump constant pressure cut-off control function, and the structure is simple and the control accuracy is high.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a fluid machine. Background technique [0002] In the prior art, many construction machinery are faced with the problem of how to save energy. For example, wheeled mobile construction machinery such as truck cranes and garbage trucks have a large number of products, high fuel consumption, and poor emissions. All of these lead to urgent solutions to energy-saving problems. [0003] Recycling energy by designing appropriate devices is an effective technical means to solve the above energy-saving problems. [0004] Swash plate axial piston pumps and swash plate axial piston motors are commonly used fluid machines in construction machinery. Because of their advantages of small size, light weight, high power density, and easy control, they are widely used in various in a hydraulic system. [0005] Figure 1-2 The working principle of the swash plate axial piston pump ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04B1/16F04B1/28F03C1/06F03C1/34
CPCF03C1/0607F03C1/0613F03C1/0615F04B1/16F04B1/28
Inventor 公传伟杜孝杰赵瑞学韩建营李少静张振华
Owner XUZHOU HEAVY MASCH CO LTD
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