High-pressure gas microflow control piezoelectric valve
A technology of high-pressure gas and piezoelectric valves, which is applied in the field of aerospace systems, can solve the problems of unseen structure realization methods, high requirements, and structures that cannot meet the requirements, and achieve the effects of small size, high precision, and fast response
Pending Publication Date: 2022-02-08
西安长峰机电研究所
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Problems solved by technology
There are products with the same basic principle in foreign countries, but due to higher requirements, the structure of this product cannot meet the requirements, so there is no product with a similar structure.
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[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments, and the present invention includes but not limited to the following embodiments.
[0027] The invention includes: a vibrator (composed of piezoelectric ceramic sheets and a frame), an air intake block, an air outlet block, a saddle pad, a clamping plate, etc., and the structure is as follows: figure 1 shown.
[0028] The vibrator is welded by piezoelectric ceramic sheet and frame. The piezoceramic sheet is in the shape of a cylindrical sheet. The outer ring of the frame is a ring structure, and there is a disc in the center for placing piezoelectric ceramic sheets. The disc and the outer ring are connected by a beam passing through the center of the circle (it can also be said to be two radial beams with an angle of 180°) . Piezoelectric ceramic discs are brazed to the discs of the frame.
[0029] The metal substrate of the frame is coated with an ins...
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Abstract
The invention provides a high-pressure gas microflow control piezoelectric valve. The valve comprises a vibrator, a gas inflow block and a gas outflow block, and a gas inflow hole is formed in the gas inflow block in the axial direction; the gas outflow block is sleeved with the gas inflow block and is provided with a gas outflow hole along the axial direction; the vibrator comprises a piezoelectric ceramic piece and a frame, a disc is arranged in the center of the frame, the disc is connected with the outer ring through a cross beam passing through the circle center, and the piezoelectric ceramic piece is brazed on the disc; the vibrator is arranged between the gas inflow block and the gas outflow block, and the piezoelectric ceramic piece covers the gas outflow hole; the two electrodes of the piezoelectric ceramic piece and conductive coatings on the surfaces of the gas inflow block and the gas outflow block respectively form electric paths, and the gas inflow block and the gas outflow block are coated with an insulating material, so that it can be ensured that the electric potential is independent; and forward and backward voltages are applied to the piezoelectric ceramic piece to drive the piezoelectric ceramic piece to block or open a gs path. The requirements of small size, fast response and high precision of valves for high-pressure gas microflow control can be satisfied.
Description
technical field [0001] The invention belongs to the technical field of aerospace systems, and relates to a micro-valve used for high-pressure gas micro-flow control. Background technique [0002] In the field of aerospace system technology, high-pressure gas micro-flow control is an important technology. Valves used for high-pressure gas micro-flow control need to be small in size, fast in response and high in precision, and ordinary valves are difficult to meet the above requirements. [0003] In 1880, the Curie brothers discovered the piezoelectric effect, and piezoelectric ceramic materials have been widely used since the 1940s. Using electrical signals to control piezoelectric ceramics can achieve fast response and high precision. However, the piezoelectric ceramic deformation range is relatively small, and there are usually two types of solutions: one is to stack multiple piezoelectric ceramic units to amplify the deformation, and the other is to symmetrically place p...
Claims
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IPC IPC(8): F16K99/00
CPCF16K99/0048F16K99/0015F16K2099/0082
Inventor 刘罡方进勇牛刚宋东旭
Owner 西安长峰机电研究所