TWI686589B - High resolution flow damping device - Google Patents

Abstract

The high resolution flow damping device comprises a substrate, a top cover and a piston mechanism. The top cover and the piston mechanisms are disposed on the substrate and the substrate includes a first air outlet. The piston mechanism includes a first lift bar, a second lift bar, a small piston and a big piston. The small piston is disposed at the first lift bar. The big piston is disposed at the second lift bar and includes a second air outlet; besides, the small piston is configured to move to the first air outlet by the first lift bar and the big piston is configured to move to the second air outlet by the second life bar.

Description

High-resolution choke device

The invention refers to a high-resolution choke device, in particular to a choke device with multiple pistons that can precisely control wind resistance.

At present, the fan needs to make a PQ characteristic curve of air volume and air pressure when performing performance testing, which is used as a criterion for judging the performance of the fan. Please refer to FIG. 1. FIG. 1 shows a known PQ curve obtained by a typical test. The so-called PQ curve is the curve of the static air pressure (P) and the outlet air flow (Q) after the fan performs work on the air. The test The main control instrument (hereinafter referred to as wind tunnel) air flow measurement. In traditional wind tunnels, a louver baffle device or a single-piston choke device is often used to control the air flow through the wind tunnel, but many of the above choke devices cannot take into account the full range and speed of the wind tunnel flow. Precisely control the air flow through the wind tunnel, which will slow down the test efficiency and even fail to reach the target measurement flow point. Therefore, how to make the wind tunnel have the ability to measure the air flow in a wide range and quickly and accurately control the air flow of the wind tunnel to reduce the time to complete the test and increase the test efficiency is worth considering by those with ordinary knowledge in the art.

The purpose of the present invention is to provide a high-resolution choke device that controls air flow with high resolution and can greatly improve test efficiency.

The high-resolution choke device of the present invention includes a layer plate, an upper cover, and a piston mechanism, wherein the upper cover and the piston mechanism are disposed on the layer plate, and the layer plate further includes a first tuyere and a second tuyere. The piston mechanism includes a first lifting rod, a second lifting rod, a small piston and a large piston, wherein the small piston is disposed on the first lifting rod, and the large piston is disposed on the second lifting rod, In addition, the small piston is suitable for moving to the first tuyere by the first lifting rod, and the large piston is suitable for moving to the second tuyere by the second lifting rod. In another high-resolution choke device, the second tuyere is not provided on the shelf, but on the large piston.

The above-mentioned high-resolution choke device further includes a first annular sealing structure for tightly engaging the small piston with the first tuyere, and a second annular sealing structure for making the large The piston is tightly engaged when the second tuyere is closed.

In another high-resolution choke device described above, the axis of the large piston coincides with the axis of the small piston.

In the above two high-resolution choke devices, there are multiple large pistons and multiple small pistons.

100: High-resolution choke device

102: upper cover

104: shelf

106: The first tuyere

108: Second tuyere

110: small piston

112: Big Piston

114: Second lift lever

116: The first lifting rod

118: Piston mechanism

200: high-resolution choke device

202: upper cover

204: shelf

206: The first tuyere

208: Second tuyere

210: small piston

212: Big Piston

214: The second lifting rod

216: The first lifting rod

218: Piston mechanism

Figure 1 shows a known PQ curve obtained from a typical test.

FIG. 2 illustrates the appearance of the high-resolution choke device 100 of this embodiment.

FIG. 3 illustrates the internal structure of the high-resolution choke device 100 of this embodiment.

4A to 4C are diagrams illustrating the operation states of the high-resolution choke device 100 of this embodiment in various stages.

FIG. 5 illustrates the appearance of the high-resolution choke device 200 according to another embodiment.

FIG. 6 illustrates the internal structure of the high-resolution choke device 200 according to another embodiment.

7A to 7C are diagrams illustrating the operation states of the high-resolution choke device 200 of this embodiment in various stages.

Please refer to FIGS. 2 and 3. FIG. 2 illustrates the appearance of the high-resolution choke device 100 of this embodiment, and FIG. 3 illustrates the internal structure of the high-resolution choke device 100 of this embodiment. The high-resolution choke device 100 includes an upper cover 102, a layer of plates 104, and a piston mechanism 118. The piston mechanism 118 includes a first lifting rod 116, a second lifting rod 114, a small piston 110 and a large piston 112, and the small piston 110 is disposed on the first lifting rod 116, and the large piston 112 is disposed on The second lifting rod 114. In addition, the upper cover 102 and the piston mechanism 118 are both disposed on the layer plate 104, and are tightly combined with the layer plate 104 to prevent air leakage. The layer plate 104 further includes a first air port 106 and a second air port 108. The tuyere 106 is small and is provided with a first ring-shaped sealing mechanism (not shown) that can be tightly combined with the small piston 110 so that air will not leak, and the second tuyere 108 is larger and is provided with a second ring-shaped sealing structure (not shown) (Show) can be closely combined with the large piston 112 so that the air will not leak. In this embodiment, the first annular sealing mechanism and the second annular sealing structure are, for example, an annular rubber gasket or an annular rubber ring.

In this embodiment, a large piston 112, a small piston 110, a first tuyere 106, and a second tuyere 108 are taken as examples, but those of ordinary skill in the art know that a high-resolution choke device More than 100 additional pistons and tuyere can be matched with each other, for example, two more pistons and two tuyere can be added, and the additional piston and the additional tuyere cooperate with each other, and the size of these pistons and tuyere can also be different In this embodiment, the large piston 112, the small piston 110, the first tuyere 106, and the second tuyere 108.

Please refer to FIGS. 4A to 4C. FIGS. 4A to 4C illustrate three states in the operation of this embodiment. FIG. 4A illustrates the state in which the first tuyere 106 and the second tuyere 108 are fully open. The small piston 110 and the large piston 112 leans against the first lifting rod 116 and the second lifting rod 114 and hangs up in the air. In this state, the air flow is the largest. Figure 4B shows In the state where the first tuyere 106 is fully open and the second tuyere 108 is closed, the large piston 112 is lowered through the second lifting rod 114 to close the second tuyere 108, so only the smaller first tuyere 106 is left in the fully open state to reduce air The flow rate is then controlled by the first lifting rod 116 to control the small piston 110 to descend and slowly close the first tuyere 106 to slowly decrease the air flow rate. FIG. 4C shows the state in which the first tuyere 106 and the second tuyere 108 are fully closed. At this time, when the small piston 110 has descended against the first lifting rod 116 and finally closed the first tuyere 106 completely, the air flow rate in this state Is zero. In this embodiment, the high-resolution choke device 100 can achieve different precision air flow control by moving the non-hole piston. For example: the high-resolution choke device 100 can first adjust the wind tunnel by moving the large piston 112 to greatly adjust the wind tunnel After reaching the target air flow, the large piston 112 is fixed, and only the small piston 110 is moved to adjust the air flow in the wind tunnel by a small amount.

Please refer to FIGS. 5 and 6. FIG. 5 illustrates the appearance of the high-resolution choke device 200 according to another embodiment, and FIG. 6 illustrates the internal structure of the high-resolution choke device 200 according to another embodiment. The high-resolution choke device 200 includes an upper cover 202, a layer of plate 204, and a piston mechanism 218. The piston mechanism 218 includes a first lifting rod 216, a second lifting rod 214, a small piston 210 and a large piston 212, and the small piston 210 is disposed on the first lifting rod 216, and the large piston 212 is disposed on On the second lifting rod upper 214, the central axes of the small piston 210 and the large piston 212 coincide. In addition, the upper cover 202 and the piston mechanism 218 are both disposed on the layer plate 204, and are tightly combined with the layer plate 204 so that air will not leak. The layer plate 204 further includes a second tuyere 208, and the large piston 212 also includes a first Yifengkou 206. The first tuyere 206 is small and is provided with a first ring-shaped sealing mechanism (not shown) that can be tightly combined with the small piston 210 so that air will not leak, and the second tuyere 208 is larger and is provided with a second ring-shaped seal structure ( (Not shown) can be tightly combined with the large piston 212 so that air will not leak. In this embodiment, the first annular sealing mechanism and the second annular sealing structure are, for example, an annular rubber gasket or an annular rubber ring.

In this embodiment, a large piston 212, a small piston 210, a first tuyere 206, and a second tuyere 208 are taken as examples, but those of ordinary skill in the art know that a high-resolution choke device In 200, more pistons and tuyere are added to match each other, for example, two more pistons and two tuyere can be added, and the additional piston and the tuyere are matched with each other, and the size of these pistons and tuyere can also be different In this embodiment, the large piston 212, the small piston 210, the first tuyere 206, and the second tuyere 208.

Please refer to FIGS. 7A-7C. FIGS. 7A-7C illustrate three states in the operation of this embodiment. FIG. 7A depicts a state where the first tuyere 206 and the second tuyere 208 are fully open. The small piston 210 and the large piston 212 leans on both the first lifting rod 216 and the second lifting rod 214 to hang up in the air, and the air flow is the largest in this state. FIG. 7B shows the state where the first tuyere 206 is fully open and the second tuyere 208 is closed. The second tuyere 208 is closed by lowering the large piston 212 through the second lifting rod 214, so only the smaller tuyere above the large piston 212 remains The first tuyere 206 is fully open to reduce the air flow, and then the small piston 210 is controlled to descend by the first lifting rod 216 to slowly close the first tuyere 206 to slowly decrease the air flow. FIG. 7C shows the state in which the first tuyere 206 and the second tuyere 208 are fully closed. At this time, the small piston 210 has descended against the first lifting rod 216 to finally close the first tuyere 206 completely. In this state, the air flow rate is zero. In this embodiment, the high-resolution choke device 200 can achieve precise control of different air flows by moving the non-hole piston. For example, the high-resolution choke device 200 can first adjust the wind tunnel by moving the large piston 212 After reaching the target air flow rate, the large piston 212 is fixed, and only the small piston 210 is moved to adjust the air flow of the wind tunnel by a small amount.

In summary, it can be seen that the high-resolution choke device of the present invention can use a single wind tunnel to cover the range of the entire large and small air volume during the test, without replacing the wind tunnel choke device during the test, thereby reducing The time required to complete the test increases test efficiency. Although the present invention has The disclosure is as above, but it is not intended to limit the present invention. Any person with ordinary knowledge in the technical field can make some changes and modifications within the spirit and scope of the present invention, so the scope of protection of the present invention should be regarded as The scope of the attached patent application shall prevail.

200: high-resolution choke device

206: The first tuyere

208: Second tuyere

210: small piston

212: Big Piston

214: The second lifting rod

216: The first lifting rod

218: Piston mechanism

Claims (6)

A high-resolution choke device is installed in a wind tunnel device. The high-resolution choke device includes: a layer of plates, including a first air outlet and a second air outlet; at least one upper cover is provided on the layer of the board; and At least one piston mechanism is disposed on the shelf. The piston mechanism includes: a first lifting rod; a second lifting rod; a small piston, disposed on the first lifting rod; a large piston, disposed on the first On the two lifting rods; and among them, the small piston is adapted to move to the first tuyere by the first lifting rod, and the large piston is adapted to be moved to the second tuyere by the second lifting rod. The high-resolution choke device as described in item 1 of the scope of the patent application further includes: a first annular sealing structure for tightly engaging the small piston with the first tuyere; and a second annular The sealing structure is used to tightly engage the large piston with the second tuyere. A high-resolution choke device is installed in a wind tunnel. The high-resolution choke device includes: a layer of plates including a second tuyere; At least one upper cover, which is arranged on the shelf; and at least one piston mechanism, which is arranged on the shelf, the piston mechanism comprises: a first lifting rod; a second lifting rod; a small piston, which is arranged on the first On the lifting rod; a large piston is provided on the second lifting rod, and the large piston includes a first tuyere; and wherein, the small piston is adapted to move to the first tuyere by the first lifting rod, the The large piston is adapted to move to the second tuyere by the second lifting rod. The high-resolution choke device as described in item 3 of the patent application scope also includes: a first annular seal structure for tightly engaging the small piston with the first tuyere; a second annular seal Structure for tightly engaging the large piston and the second tuyere when closed. The high-resolution choke device as described in item 3 of the patent application scope, wherein the axis of the large piston coincides with the axis of the small piston. The high-resolution choke device as described in item 1 or 3 of the patent application scope, in which there are multiple large pistons and multiple small pistons.

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