Piston, plunger pump and hydraulic device
A plunger pump and plunger technology, applied in the field of plunger, plunger pump and hydraulic device, can solve the problems of wear, short service life, high friction force between plunger and cylinder, etc. The effect of increasing and reducing friction
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Embodiment 1
[0041] Such as image 3 As shown, the embodiment of the present invention provides a plunger, including a plunger body 1, and an annular groove 2 is arranged on the plunger body 1 along the circumferential direction.
[0042] The depth of the annular groove 2 is 0.3mm, that is to say, the maximum distance between the bottom of the annular groove 2 and the opening of the annular groove 2 is 0.3mm; The distance between the edges is 0.5mm, in Figure 7 and Figure 8 In the direction shown, at the top opening of the annular groove 2, the distance between the left and right sides is 0.5 mm.
[0043] The bottom surface of the annular groove 2 can be a plane or a curved surface, such as Figure 7 As shown, the bottom surface of the annular groove 2 is a plane, such as Figure 8 As shown, the bottom surface of the arc-shaped groove 2 is a curved surface.
[0044] The plunger body 1 is divided into three parts along its length direction, and the middle part is called the middle pa...
Embodiment 2
[0058] Such as Figure 9 As shown, Embodiment 2 of the present invention provides a plunger pump. The plunger pump provided in this embodiment includes a cylinder body 3 and the plunger provided in Embodiment 1. A copper sleeve 4 is embedded in the cylinder body 3 . The sleeve 4 is located in the cylinder bore of the cylinder body 3, and one end of the plunger body 1 of the plunger extends into the copper sleeve 4 in the cylinder body 3. The copper sleeve 4 can further reduce the degree of wear of the cylinder body 3 and increase the service life of the cylinder body 3, thereby improving the service life of the plunger pump.
[0059] Compared with the plunger pump in the prior art, since the plunger in the plunger pump provided by the second embodiment is provided with an annular groove 2, the annular groove 2 changes the plunger during the working process of the plunger. The lateral stress distribution on the side of the plug reduces the lateral stress on the side of the plu...
Embodiment 3
[0064] Such as Figure 10 As shown, Embodiment 3 of the present invention provides a plunger pump. The plunger pump provided in this embodiment includes a cylinder body 3 and the plunger provided in Embodiment 1. In this embodiment, the cylinder body 3 is made of ductile iron , the plunger is made of steel. The difference from the plunger pump provided in Embodiment 2 is that the cylinder body 3 of the plunger pump provided in Embodiment 3 is not provided with a copper sleeve 4, and the plunger body 1 of the plunger is directly inserted into the cylinder body 3 in the cylinder bore.
[0065] Compared with the plunger pump in the prior art, since the plunger in the plunger pump provided by the third embodiment is provided with an annular groove 2, the friction force between the plunger and the cylinder body 3 is reduced, so there is no need to Setting the copper sleeve 4 also works fine.
[0066] Compared with the plunger pump in the prior art, the plunger pump provided in t...
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