A closed hollow thin-walled plunger and plunger pump based on slm technology
A hollow, thin-walled and plunger technology, which is applied to parts, pumps, and multi-cylinder pumps of elastic fluid pumping devices, can solve the problems of staying in the design stage and limited plunger design and manufacturing, and achieve Effects of reducing mass, saving energy and manufacturing materials, and reducing friction
Active Publication Date: 2018-05-29
ZHEJIANG UNIV
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Problems solved by technology
However, because the design and manufacture of plungers are limited by traditional machine tools, many plunger structures with superior performance only stay in the design stage.
Method used
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[0016] The aforementioned and other technical contents, features and effects of the present invention will be further described below in conjunction with the accompanying drawings.
[0017] figure 1 and figure 2 Shown is a structural diagram of an existing axial plunger pump, which is mainly composed of a flow plate 1, a cylinder body 2, a plunger 3, a preload spring 4, a return plate 5 and a sliding shoe 6, and the cylinder body 2. There is a plunger hole 7 for accommodating the plunger 3 along the circumferential direction. The plunger head 11 of the plunger 3 is ball-hinged on the sliding shoe 6, and the sliding shoe 6 is sleeved on the return plate 5. The The distribution plate 1 is installed on the cylinder body 2. The distribution plate 1 has an oil distribution hole 8 corresponding to the plunger hole 7. The sealed working volume at the bottom of the plunger 3 in the cylinder body 2 passes through the oil distribution plate 1 and the pump. The inlet and outlet are co...
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The invention discloses a closed hollow thin-wall plunger based on the SLM technology and a plunger pump. The plunger comprises a plunger main body and a countersunk bolt. The plunger main body is integrally formed by a plunger head portion, a connection portion and a plunger tail portion in sequence, the plunger head portion is a hollow sphere, and oil passing holes are formed in the hollow sphere; the plunger tail portion is a hollow cylinder, at least two evenly distributed spiral oil passing flow channels are arranged on the side wall of the hollow cylinder, and the spiral oil passing flow channels communicate with the oil passing holes in the connection portion; and a through hole is formed in the bottom of the hollow cylinder, and the countersunk bolt is rotatably connected to the through hole. According to the closed hollow thin-wall plunger based on SLM technology and the plunger pump, SLM rapid prototyping technology is applied to manufacture of a plunger and a plunger pump, so that a closed hollow thin-wall structure is designed, mass of the plunger is remarkably reduced, driving force, inertia force during movement and invalid volume are reduced, volume efficiency is improved, abrasion is relieved, usage performance of the plunger pump is remarkably improved, and the service life of the plunger pump is greatly prolonged.
Description
technical field [0001] The invention belongs to the technical field of plunger pumps, in particular to a closed hollow thin-walled plunger and a plunger pump based on selective laser melting (SLM) technology. Background technique [0002] The plunger is an important part of the plunger pump. figure 1 It is a structural diagram of an existing axial piston pump, which is mainly composed of a valve plate, a cylinder body, a plunger, a preload spring, a return plate and a sliding shoe. There is a certain angle between the axis of the swash plate and the axis of the cylinder body, so that when the cylinder body rotates under the drive of the transmission shaft, the plunger makes a reciprocating linear motion in the cylinder body, thereby completing the process of oil absorption and oil discharge. The plunger is a key part of the plunger pump, and its structural design and manufacturing quality have an important impact on the performance of the plunger pump. However, because the...
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IPC IPC(8): F04B53/14F04B1/20
CPCF04B1/124F04B1/20
Inventor 祝毅葛翔
Owner ZHEJIANG UNIV