应用于平衡阀的组合阻尼、双作用平衡阀及工程机械

Abstract

本申请公开一种应用于平衡阀的组合阻尼、双作用平衡阀及工程机械，涉及机械领域，本申请通过在平衡阀内分别独立设置两个阻尼块，阻尼块上设置有两个阻尼流道，油液在从一侧至二侧流动时，油液依次经过两个阻尼块上的第二个阻尼流道，反之，油液在从二侧至一侧流动时，油液依次经过两个阻尼块上的第一个阻尼流道，使得两侧的实际开启比相互独立、以实现不同的先导开启比，本申请的双作用平衡阀包括平衡阀体、一侧阀芯、二侧阀芯以及组合阻尼，双作用平衡阀可以在两侧实现不同的先导开启比，适用性强，本申请的工程机械包括工程机械本体以及双作用平衡阀，可以通过调整不同的先导开启比以适应两个方向上负载特性相差很大的工况。

Claims

1. A combined damper for application to a balance valve, characterized in that It includes two damping blocks (100) disposed in the balance valve (200), and the balance valve (200) is provided with valve chambers (200a) corresponding to the damping blocks (100) one by one. The valve chambers (200a) are respectively provided with a first valve port (P1) and a second valve port (P2) at both ends in the first direction. A damping block (100) is slidably disposed in a valve cavity (200a) along a first direction, dividing the valve cavity (200a) into a first sub-cavity (200b) and a second sub-cavity (200c). In the first direction, the damping block (100) is provided with a first sidewall (120) for closing the first valve port (P1) and a second sidewall (130) for closing the second valve port (P2). The damping block (100) is provided with two damping channels (110). One end of the first damping channel (110a) is opened on the first sidewall (120) and corresponds to the first valve port (P1) in the first direction, and the other end is open and communicates with the second sub-cavity (200c). One end of the second damping channel (110b) is opened on the second sidewall (130) and corresponds to the second valve port (P2) in the first direction, and the other end is open and communicates with the first sub-cavity (200b). The first valve port (P1) of the first valve chamber (200a) is connected to the first oil port (V1) of the balance valve (200), the second valve port (P2) of the first valve chamber (200a) is connected to the first valve port (P1) of the second valve chamber (200a), and the second valve port (P2) of the second valve chamber (200a) is connected to the second oil port (V2) of the balance valve (200).

2. The combination damper of claim 1, wherein, The damping block (100) includes a cylindrical body (140) and two supporting and limiting parts (150); the cylindrical body (140) is provided with a first sidewall (120) and a second sidewall (130) in a first direction; in the first direction, the projection of the first sidewall (120) completely covers the first valve port (P1), and the projection of the second sidewall (130) completely covers the second valve port (P2); the two supporting and limiting parts (150) are spaced apart on the cylindrical body (140) along the first direction, and the supporting and limiting parts (150) slide in contact with the inner circumferential surface of the valve cavity (200a); A first sub-cavity (200b) is formed between the first support limiting part, the outer peripheral surface of the cylindrical body (140), and the inner peripheral wall of the valve cavity (200a); a second sub-cavity (200c) is formed between the second support limiting part, the outer peripheral surface of the cylindrical body (140), and the inner peripheral wall of the valve cavity (200a).

3. The combination damper of claim 1, wherein, The first damping flow channel (110a) includes a first flow channel (111) and a first damping hole (112); one end of the first flow channel (111) is open on the first sidewall (120); the first damping hole (112) is connected to the first flow channel (111) and the second sub-cavity (200c) respectively; the second damping flow channel (110b) includes a second flow channel (113) and a second damping hole (114); one end of the second flow channel (113) is open on the second sidewall (130); the second damping hole (114) is connected to the second flow channel (113) and the first sub-cavity (200b) respectively.

4. The combination damper of claim 3, wherein, The combined damping also includes a one-way valve (160) disposed in the first flow channel (111) or the second flow channel (113), wherein the permissible flow direction of the one-way valve (160) is configured to be from the first damping orifice (112) to the first flow channel (111) or from the second damping orifice (114) to the second flow channel (113).

5. The combination damper of claim 4, wherein, The one-way valve (160) includes a mounting head (161), an elastic element (162), and a steel ball (163); the mounting head (161) is connected to the first flow channel (111) or the second flow channel (113); the two ends of the elastic element (162) are respectively connected to the mounting head (161) and the steel ball (163), and the extension and retraction direction of the elastic element (162) is configured as the first direction; the steel ball (163) is blocked in the first damping hole (112) or the second damping hole (114).

6. The combination damper of claim 5, wherein, The mounting head (161) is provided with external threads, and the mounting head (161) is connected to the internal circumferential threads of the first flow channel (111) or the second flow channel (113).

7. A double-acting balanced valve characterized by It includes a balance valve body (210), a one-side valve core (220), two-side valve cores (230), and the combined damping as described in any one of claims 1 to 6; The balance valve body (210) is provided with a first valve hole (200d), a first valve chamber (200a), a second valve chamber (200a) and a second valve hole (200e) in sequence in the first direction; A valve core (220) is disposed in the first valve hole (200d), and the first oil port (V1) on the balance valve body (210) is connected to the first valve port (P1) of the first valve chamber (200a) through the valve core (220); The two valve cores (230) are disposed in the second valve hole (200e), and the second oil port (V2) on the balance valve body (210) is connected to the second valve port (P2) of the second valve chamber (200a) through the two valve cores (230); The two damping blocks (100) of the combined damping are respectively disposed in the first valve chamber (200a) and the second valve chamber (200a).

8. A working machine, characterized in that Includes the engineering machinery body and the double-acting balance valve (200) of claim 7 disposed on the engineering machinery body.

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