Power distribution hydraulic system and crane
A hydraulic system and power technology, applied in the field of crane equipment, can solve problems such as increased power required to drive loads, action failure, and abnormal load actions
Active Publication Date: 2021-07-30
ZOOMLION HEAVY IND CO LTD
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Problems solved by technology
[0004] However, at present, the hydraulic system of the load series circuit still has the following problems to be solved urgently: in the case of a constant driving power of the hydraulic pump, the failure of the preceding load in the load series circuit leads to an increase in the power required to drive the load. , will lead to abnormal action of the subsequent load until the action fails
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[0046] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0047] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implying the number of indicated technical features Therefore, features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include one or more of said features.
[0048] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a Integral connection; it ...
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The invention discloses a power distribution hydraulic system, which includes a quantitative pump, an overflow valve, an oil inlet circuit, an oil return circuit, at least one first load actuator and a second load actuator, and the overflow valve is arranged on the Between the oil inlet oil circuit and the oil return oil circuit, there is also at least one power control valve, each of the power control valves is connected in sequence to form a load series oil circuit, and each of the first load actuators is connected in parallel with the corresponding power control valve A first load series unit is formed, the first load series unit is connected to the quantitative pump through the oil inlet circuit, and the first load series unit is connected to the oil return circuit through the second load actuator, so as to be able to control each The power consumed by the first load actuator and the second load actuator. The invention also discloses a crane. The invention can control the power consumption of each load, so as to ensure that the action of the lower load is not affected when the first load in the load series circuit fails.
Description
technical field [0001] The present invention relates to crane equipment, in particular to a power distribution hydraulic system, and also to a crane. Background technique [0002] Truck crane is a kind of widely used construction machinery. This kind of machinery can walk at a relatively fast speed, has good maneuverability, strong adaptability, self-contained power does not need to be equipped with a power supply, can work in the field, and is easy and flexible to operate. Therefore, in transportation, It has been widely used in urban construction, fire protection, large material yards, infrastructure, first aid and other fields. The hydraulic lifting technology is adopted on the truck crane, which has a large bearing capacity and can work under the conditions of shock, vibration and poor environment. [0003] In the hydraulic system of truck cranes, the hydraulic system with load series circuit is often used (for example, the air conditioning system and the hydraulic moto...
Claims
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IPC IPC(8): F15B11/16F15B13/06
CPCF15B11/161F15B13/06F15B2211/20538F15B2211/8633
Inventor 冀成年王磊何伟黄珍周庆喜
Owner ZOOMLION HEAVY IND CO LTD