Closed hydraulic loop hot oil displacement system and concrete pumping device
A hydraulic circuit and hot oil technology, which is applied to fluid pressure actuation system components, mechanical equipment, fluid pressure actuation devices, etc., can solve problems such as heat dissipation, reduce energy loss, improve cleanliness, and prevent high temperature overload
Active Publication Date: 2015-03-18
SANY AUTOMOBILE MFG CO LTD
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Problems solved by technology
[0004] In view of this, the present invention proposes a closed hydraulic circuit hot oil replacement system and concrete pumping equipment, which can change the hydraulic oil in the closed hydraulic circuit to solve the problem of heat dissipation in the closed hydraulic circuit of the concrete pumping equipment. question
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[0029] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0030] Such as figure 1 As shown, the closed hydraulic circuit hot oil replacement system of the present invention is an embodiment of concrete pumping equipment used in high-pressure pumping conditions, including: a first oil pump 5, a first oil cylinder 16.1, a second oil cylinder 16.2, and an oil tank 2. Oil suction filter 1, hot oil replacement circuit, controller 14, temperature sensor 15, proximity switches 17.1, 17.2, 17.3, 17.4, pressure maintaining circuit, charge pump 4, flushing valve 13. The first oil pump 5 includes a first oil inlet and outlet and a second oil inlet and outlet, the second oil inlet and outlet are in communication with the rodless chamber of the second oil cylinder ...
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The invention discloses a closed hydraulic loop hot oil displacement system, and the closed hydraulic loop hot oil displacement system includes a first oil pump, a first oil cylinder, a second oil cylinder, an oil tank, a hot oil replacement loop, a controller, a temperature sensor, and a route detecting component. The first oil pump includes the first oil inlet-and-outlet and a second oil inlet-and-outlet. The temperature sensor is used for detecting the route of a piston rod of the first oil cylinder, and the controller acquires signals of the route detecting component. The hot oil displacement loop is placed in the oil-way between the first oil inlet-and-outlet and a rodless cavity of the first cylinder. When the oil temperature of the in-out oil-way of the first oil pump reaches a set threshold value and the piston rod of the first oil cylinder is arranged in the retraction route, the controller controls the hot oil displacement loop, and communicates the rodless cavity of the first oil cylinder and the first oil inlet-and-outlet with the oil tank respectively, otherwise, communicates the first oil inlet-and-outlet with the rodless cavity of the first oil cylinder. The closed hydraulic loop hot oil displacement system achieves displacement between the high temperature hydraulic oil in the closed hydraulic system and the low temperature hydraulic oil in the oil tank.
Description
technical field [0001] The invention relates to the field of construction machinery, in particular to a closed hydraulic circuit hot oil replacement system and concrete pumping equipment. Background technique [0002] At present, in the domestic and foreign markets, there are two basic types of hydraulic power systems for concrete pump trucks: open hydraulic system and closed hydraulic system. Among them, the closed hydraulic system is composed of plunger pump, hydraulic cylinder, radiator, filter, etc. The whole system has compact structure, high efficiency and stable performance, but because the hydraulic oil as the medium in the closed hydraulic system has been circulating repeatedly in the system , so that the temperature of the oil continues to rise, which in turn affects the entire hydraulic system. In order to solve this problem, the existing technology is to integrate a flushing valve inside the hydraulic pump or hydraulic motor. The function of the flushing valve i...
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IPC IPC(8): F15B21/04
Inventor 胡江平叶玉全王金羽
Owner SANY AUTOMOBILE MFG CO LTD