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Balance valve, hydraulic system and engineering machinery

A technology of balance valve and hydraulic fluid, which is applied in the direction of fluid pressure actuation system components, mechanical equipment, fluid pressure actuation device, etc., which can solve the problem of loss of balance valve and achieve the effect of improving the switching position

Active Publication Date: 2018-11-06
JIANGSU XCMG CONSTR MASCH RES INST LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the related art, the pressure of the hydraulic fluid introduced by the second hydraulic fluid port of the balance valve pushes the spool toward the above-mentioned second working position. When the pressure of the hydraulic fluid introduced by the second hydraulic fluid port is too high, the balance valve is easy to Switch to the second working position under the action of the hydraulic fluid introduced by the second hydraulic fluid port, so that the balance valve loses the function of locking the hydraulic actuator

Method used

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  • Balance valve, hydraulic system and engineering machinery
  • Balance valve, hydraulic system and engineering machinery
  • Balance valve, hydraulic system and engineering machinery

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Embodiment Construction

[0065] 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 efforts fall within the protection scope of the present invention.

[0066] figure 1 A schematic diagram of the balance valve of the present embodiment is shown; figure 2 A structural diagram of the balance valve of this embodiment is shown.

[0067] to combine figure 1 and figure 2 As shown, the balance valve of this embodiment includes a valve body 4 with a va...

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Abstract

The invention relates to a balance valve, a hydraulic system and engineering machinery. The balance valve comprises a valve body (4), a first hydraulic fluid port (A), a second hydraulic fluid port (B) and a first valve element (7), wherein the valve body (4) is provided with a valve cavity; the first hydraulic fluid port (A) and the second hydraulic fluid port (B) communicate with the valve cavity; the first valve element (7) is movably arranged in the valve cavity and conducts switching between a first working position and a second working position; in the first working position, the first hydraulic fluid port (A) communicates with the second hydraulic fluid port (B) in the unidirectional direction; in the second working position, the second hydraulic fluid port (B) communicates with thefirst hydraulic fluid port (A); when the first valve element (7) is in the first working position, hydraulic fluid introduced into the second hydraulic fluid port (B) pushes the first valve element (7) to the first working position. The problem of position switching of a first valve element of a balance valve under the action of pressure of hydraulic fluid introduced into a second hydraulic fluidport is improved.

Description

technical field [0001] The invention relates to the field of engineering equipment, in particular to a balance valve, a hydraulic system and engineering machinery. Background technique [0002] Balance valves are widely used in hydraulic systems of construction machinery. The balance valve includes a first hydraulic fluid port, a second hydraulic fluid port and a spool for changing the communication state of the first hydraulic fluid port and the second hydraulic fluid port, the spool has a first working position and a second working position , in the first working position, the first hydraulic fluid port is unidirectionally connected to the second hydraulic fluid port, that is, the hydraulic fluid entering the first hydraulic fluid port can be discharged from the second hydraulic fluid port, when there is no hydraulic fluid from the first hydraulic fluid port When the port reaches the second hydraulic fluid port or enters the second hydraulic fluid port from the actuator a...

Claims

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Application Information

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IPC IPC(8): F15B13/02F15B21/00
CPCF15B13/021F15B13/026F15B21/001
Inventor 张笑徐艳翠赵燕
Owner JIANGSU XCMG CONSTR MASCH RES INST LTD
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