Electromagnetic plunger pump and closed hydraulic system
A technology of electromagnetic column and plug pump, which is used in fluid pressure actuation system testing, fluid pressure actuation system components, pumps, etc. The effect of uniform coal size, saving operation time, and reducing the amount of fine coal and dust
Active Publication Date: 2018-07-27
CHINA SHENHUA ENERGY CO LTD +1
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- Description
- Claims
- Application Information
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Problems solved by technology
[0003] Based on the above problems, the present invention proposes an electromagnetic plunger pump and a closed hydraulic system, which solves the problem in the prior art that the pick is easily damaged and the gear transmission system of the cutting drive part fails.
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[0028] The present invention will be further described in detail below in conjunction with specific embodiments and drawings. It is only intended to elaborate on the specific embodiments of the present invention, and does not impose any restriction on the present invention. The protection scope of the present invention is subject to the claims.
[0029] Reference figure 1 , figure 2 with image 3 , The present invention proposes an electromagnetic plunger pump, including:
[0030] The electromagnetic drive unit 1, the permanent magnet 2, the plunger 3 and the hydraulic cylinder 5. The permanent magnet 2 is arranged corresponding to the electromagnetic drive unit 1. The two ends of the plunger 3 are respectively provided with a first oil passage C1 and a second oil passage C2, Both ends of the cylinder 5 are respectively provided with a third oil passage group and a fourth oil passage group;
[0031] The electromagnetic drive unit 1 drives the plunger 3 to reciprocate in the hydraul...
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The invention provides an electromagnetic plunger pump and a closed type hydraulic system. The electromagnetic plunger pump comprises an electromagnetic driving portion, a permanent magnet, a plunger and a hydraulic cylinder. The permanent magnet and the electromagnetic driving portion are correspondingly arranged. A first oil channel and a second oil channel are formed in the two ends of the plunger, and a third oil channel set and a fourth oil channel set are formed in the two ends of the hydraulic cylinder. The electromagnetic driving portion drives the plunger to conduct reciprocating movement in the hydraulic cylinder so that hydraulic oil can enter an energy accumulator which is connected with the electromagnetic plunger pump, and high-pressure oil can be formed; and when the plunger works to enable the first oil channel and the third oil channel set to be communicated or enable the second oil channel and the fourth oil channel set to be communicated, the high-pressure oil in the energy accumulator is released, and therefore external cutting picks can generate impact movement. The electromagnetic plunger pump and the closed type hydraulic system solve the problem that in the prior art, due to the fact that cutting picks are prone to being damaged, a gear driving system which conducts cutting on the driving portion is out of operation.
Description
Technical field [0001] The invention relates to the field of coal mines, in particular to an electromagnetic plunger pump and a closed hydraulic system. Background technique [0002] In the prior art, in the process of crushing coal and rock by the coal mining machine and the drum of the roadheader, the picks, blades and the coal rock mass will be squeezed and rubbed, and the power consumed in the squeezing and friction is about The cutting power is 1 / 3~1 / 2. As the hardness of the coal increases, the wear rate of the picks and blades also increases. The severely worn picks and blades increase the cutting resistance, and the working conditions of the cutting drive system tend to deteriorate. If drum maintenance and pick replacement are not timely, it is very easy to cause the rocker arm of the shearer or roadheader to be overloaded, causing mechanical failure, and even failure of the gear transmission system of the cutting drive. Moreover, in the cutting process, the extrusion a...
Claims
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IPC IPC(8): F15B21/08F15B19/00F15B21/00F15B1/033F04B17/04
CPCF04B17/04F15B1/033F15B19/00F15B21/001F15B21/087
Inventor 张剑华刘战英王亚军张云飞杨增福
Owner CHINA SHENHUA ENERGY CO LTD