Spiral type variable capacity buffer and work method thereof

A buffer, screw technology, applied in the direction of shock absorbers, shock absorbers, liquid shock absorbers, etc., can solve the problems of inability to automatically adjust the buffer resistance, uncontrollable buffer process, unstable buffer process, etc., to achieve rapid adjustment , the effect of fast response and large buffer range

Pending Publication Date: 2019-06-14
SHANDONG UNIV OF SCI & TECH
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AI-Extracted Technical Summary

Problems solved by technology

[0003] However, whether it is a single-cylinder or multi-cylinder buffer, once the current buffer structure is manufactured, its structure is fixed. When performing buffering, the buffering process is not stable and the...
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Method used

As shown in Figure 9, be spiral type varactor electromagnetic coil part experimental schematic diagram, change the electric current size of electromagnetic coil by changing the resistance value of rheostat, thereby change the size of magnetic field intensity, adjust magnetically controlled shape memory alloy block The degree of change, so as to get the best magnetic field strength.
[0053] Specifically, the electromagnetic coil 7 is surrounded on the cylind...
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Abstract

The invention relates to a spiral type variable capacity buffer and a work method thereof. The variable capacity buffer comprises a cylinder body, a first piston, a first piston rod, a bump head, anda valve block; the first piston, the first piston rod and the bump head are sequentially connected, the first piston is located in the cylinder body, the cylinder body is sealed through the first endcover, a spiral line groove is formed in the first piston, a magnetically controlled shape memory alloy block is arranged in the spiral line groove, the position, between the bump head and the first end cover, of the first piston rod is sleeved with a first reset spring, an electromagnetic coil is arranged on the periphery of the cylinder body, and the bottom of the cylinder body is connected withthe valve block. Compared with a common spiral line groove structure, the buffer has the beneficial effects that a series of spiral grooves are formed in the piston, the magnetically controlled shapememory alloy block is arranged in the groove of the first piston, according to various working conditions, the capacity of the spiral line grooves can be adjusted in a self-adaptation manner, the local resistance is changed, good controllability is achieved, the magnetically controlled shape memory alloy block is high in deforming response speed, the circulation capacity of the spiral line grooves can be rapidly adjusted, and the buffer range of the buffer is large.

Application Domain

SpringsLiquid based dampers +1

Technology Topic

Cylinder blockEngineering +9

Image

  • Spiral type variable capacity buffer and work method thereof
  • Spiral type variable capacity buffer and work method thereof
  • Spiral type variable capacity buffer and work method thereof

Examples

  • Experimental program(4)

Example Embodiment

[0048] Example 1:
[0049] Such as Figure 1 to Figure 6 As shown, this embodiment provides a spiral variable capacity buffer, which includes a cylinder 6, a first piston 5, a first piston rod 2, a ram 1, and a valve block 9;
[0050] The first piston 5, the first piston rod 2 and the ram 1 are connected in sequence. The first piston 5 is located in the cylinder 6 and is enclosed by the first end cover 4. The first piston 5 is provided with a spiral groove. The spiral groove is equipped with a magnetron shape memory alloy block; the first piston 5 divides the inner cavity of the cylinder 6 into an upper cavity A and a lower cavity B;
[0051] A first return spring 3 is sleeved on the first piston rod 2 between the ram 1 and the first end cover 4, a solenoid 7 is provided on the outer circumference of the cylinder 6, and a valve block 9 is connected to the bottom of the cylinder 6;
[0052] The valve block 9 is provided with a pressure sensor and a controller. The controller is connected with the pressure sensor and the electromagnetic coil. The pressure sensor is used to detect the pressure change of the cylinder cavity and transmit the pressure signal to the controller. The controller controls the power supply to supply power to the electromagnetic coil. At the same time, when the pressure signal obtained by the pressure sensor changes, the controller can adjust the power supply current to the electromagnetic coil in real time, thereby adjusting the magnetic field intensity of the electromagnetic coil.
[0053] Specifically, the electromagnetic coil 7 is surrounded on the cylinder 6 by two splints 8, the splints 8 are semicircular, and the two splints 8 form a circle. The electromagnetic coil 7 is wound on the splint 8 along the splint axis one by one, and then the two splints 8 are hooped around the outer circumference of the cylinder block 6, so that the electromagnetic coil 7 is evenly distributed on the cylinder block 6, and the electromagnetic coil 7 can be made after power on. Generate uniform magnetic field strength.
[0054] In this embodiment, the spiral groove is a single-ended serial groove, such as Figure 5a As shown, the single-head serial groove surrounds the top of the first piston to the bottom of the first piston. The magnetron shape memory alloy blocks are distributed in the slot from top to bottom, and the slot is provided with a key slot for installing the magnetron shape memory alloy block. The magnetron shape memory alloy block includes a cylinder tube 15, a second piston 14, a second piston rod 11 and an adjustment plate 10. The second piston 14, the second piston rod 11 and the adjustment plate 10 are connected in sequence, and the second piston 14 is located in the cylinder tube. 15 and encapsulated by the second end cover 12. The inner bottom of the cylinder tube 15 is provided with a magnetic control memory alloy and is located below the second piston 14. The outer circumference of the cylinder tube 15 is covered with a second return spring 13, a cylinder of a magnetic control shape memory alloy block The barrel 15 has an inverted T shape and can support the second return spring 13. A mounting plate 16 is connected to the bottom of the cylinder tube 15, and the magnetron shape memory alloy block is glued into the key groove in the spiral groove through the mounting plate 16. The internal and external structure of the magnetron shape memory alloy block, such as Figure 2a , Figure 2b , Figure 2c , Figure 2d , image 3 Shown.
[0055] The adjusting plate 10 is an arc-shaped plate, and its arc curve can achieve perfect fit with the inner wall of the cylinder. The adjusting plate 10 and the cylinder 15 are provided with shackles. The upper and lower ends of the second return spring 13 are respectively connected with the adjusting plate 10 and the cylinder. The tube is connected with 15 hooks.

Example Embodiment

[0056] Example 2:
[0057] A spiral variable volume buffer, the structure is as described in Embodiment 1, and the difference lies in: the spiral groove is a multi-head parallel groove, and the multi-head parallel groove is uniformly distributed on the surface of the first piston 5. Magnetron shape memory alloy blocks are distributed in each wire slot around a circle.

Example Embodiment

[0058] Example 3:
[0059] A working method of a spiral variable capacitance buffer includes the following steps:
[0060] (1) When the ram 1 receives an impact, the first piston rod 2 moves down, and at the same time, the pressure sensor detects the pressure change, and transmits the pressure signal to the controller. The controller controls the power supply to the electromagnetic field according to the pressure signal. The magnitude of the power supply current of the coil 7, so as to adjust the field strength generated by the electromagnetic coil 7;
[0061] (2) The electromagnetic coil 7 adjusts the magnetron shape memory alloy block through different field strengths, thereby adjusting the capacity of the spiral groove; that is, when the pressure signal transmitted by the pressure sensor becomes smaller, the field strength generated by the electromagnetic coil 7 becomes larger. The second piston rod 11 in the magnetron shape memory alloy block on the spiral groove is extended, and the flow capacity of the spiral groove is reduced; when the pressure signal transmitted by the pressure sensor becomes larger, the field strength generated by the electromagnetic coil 7 becomes smaller , So that the second piston rod 11 in the magnetron shape memory alloy block on the spiral groove is retracted, and the flow capacity of the spiral groove is increased;
[0062] (3) During the continuous downward movement of the first piston rod 2, the oil from the lower chamber B of the cylinder enters the upper chamber A of the cylinder through the spiral groove, and the oil consumes energy through the spiral groove;
[0063] (4) At the end of the buffering, the first piston rod 2 is reset under the action of the first return spring 3, the solenoid 7 is de-energized, and the magnetron shape memory alloy block is restored to the initial position under the action of the second return spring 13 to complete This buffer.

PUM

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Description & Claims & Application Information

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