一种带有填充件的内啮合齿轮泵

Abstract

本实用新型提供了一种带有填充件的内啮合齿轮泵，包括泵体、内齿圈以及内啮合于内齿圈的外齿轮，内齿圈与外齿轮之间形成一个月牙形空腔，该空腔内设置有填充件，所述填充件包括第一外月牙块、第一内月牙块、第二外月牙块、第二内月牙块，四个月牙块的一端均设有带销孔的连接部，四个月牙块的连接部的位置互相错开，各连接部的销孔位于同一轴线上并插有定位销，四个月牙块均可绕定位销摆动；第一外月牙块与第一内月牙块之间、第二外月牙块与第二内月牙块之间均设有橡胶棒和弹片。本实用新型提供的齿轮泵可以实现正反旋转泵油，且能提高内外月牙块的稳定性和灵活性，从而通过内外月牙块的径向补偿来确保齿轮泵的密封效果。

Claims

1. An internal gear pump with a filler, comprising a pump body (1), an internal gear ring (2), and an external gear (3) internally meshing with the internal gear ring (2), wherein a crescent-shaped cavity is formed between the internal gear ring (2) and the external gear (3), and a filler is disposed in the cavity, characterized in that: The filling component includes a first outer crescent block (4), a first inner crescent block (5), a second outer crescent block (6), and a second inner crescent block (7). Each of the four crescent blocks has a connecting part with a pin hole at one end. The positions of the connecting parts of the four crescent blocks are staggered. The pin holes of each connecting part are located on the same axis and are fitted with positioning pins. All four crescent blocks can swing around the positioning pins. A rubber rod (10) and a spring piece (11) are provided between the first outer crescent block (4) and the first inner crescent block (5), and between the second outer crescent block (6) and the second inner crescent block (7).

2. The internally meshing gear pump with a filler piece of claim 1, wherein: The connecting part of the first outer crescent block (4) is adjacent to the connecting part of the second inner crescent block (7), and the connecting part of the first inner crescent block (5) is adjacent to the connecting part of the second outer crescent block (6).

3. The internal gear pump with a filler according to claim 1 or 2, characterized in that: The positioning pin can be one or two pins arranged coaxially.

4. The internally geared pump with a filler piece of claim 1 or 2, wherein: The inner arc surfaces of the first outer crescent block (4) and the second outer crescent block (6) are both provided with limiting protrusions (13).

5. The internally geared pump with a filler as claimed in claim 4, characterized in that: The limiting protrusion (13) is away from the connecting part.

6. The internally geared pump with a filler piece of claim 1 or 2, wherein: The outer arc surfaces of the first inner crescent block (5) and the second inner crescent block (7) are provided with grooves (12) for installing rubber rods (10) and spring pieces (11).

7. The internally geared pump with a filler as claimed in claim 6, characterized in that: The groove (12) is located near the connecting part.

Images