JP5777930B2 - Air volume adjustment damper - Google Patents

Description

  The present invention relates to an air volume adjusting damper installed in an air outlet such as an air conditioning duct or a fan.

  Conventionally, in order to adjust the amount of air blown from a blower opening such as an air conditioning duct or a fan, an airflow adjustment damper is installed in the blower opening. 7 is a front view of a conventional air volume adjusting damper, FIG. 8 is a side view of the air volume adjusting damper, FIG. 9A is an enlarged view of a portion B (near the connecting portion of the main shaft), and FIG. ) Is a plan view of part B, and FIG. 9C is a side view of part B.

  As shown in these drawings, the air volume adjusting damper includes a rectangular cylindrical casing 61 having an opening through which air from an air conditioning duct or the like passes. A rectangular frame-shaped upstream flange 69a is attached to the upstream side along the rectangular frame of the casing 61, and a downstream flange 69b of the same shape is attached to the downstream side. Inside the casing 61, one elongated cylindrical shaft 62a and eleven slave shafts 62b are disposed horizontally. Each of the main shaft 62a and the plurality of slave shafts 62b is attached with a rectangular plate-like blade 63 that adjusts the air volume by changing the inclination. Both end portions of the main shaft 62a and the slave shaft 62b pass through both side surfaces of the casing 61 and are rotatably supported.

  As shown in FIG. 9 (c), two parallel rectangular connection plates 64 a and 64 b are installed on the one outer surface of the casing 61 on the left and right sides in the vertical direction of the side surface of the casing 61. . On each of the parallel connection plates 64a and 64b, one end of a rectangular plate-shaped parallel connection arm 65a, 65b and 65c forming a link mechanism is connected at equal intervals. The other ends of the parallel connection arms 65a, 65b, 65c are connected to the main shaft 62a or the slave shaft 62b.

  When two adjacent shafts (main shaft 62a or slave shaft 62b) are considered as one set, two sets,... In order from the top, a parallel link mechanism 70 shown in FIG. ing. That is, a bell crank 68a is formed by connecting the other end of the parallel connecting arm 65a and one end of the reversing connecting arm 66a. Similarly, the other end of the parallel connecting arm 65b and the reversing connecting arm 66b A bell crank 68b is formed by connecting one end. Further, the parallel link mechanism 70 is formed by connecting the end portions of the two bell cranks 68a and 68b to the end portions of the reversing connecting plate 67 having a rectangular plate shape for transmitting the reversing force.

  As shown in FIGS. 7 and 8, a switch 71 for rotating the main shaft 62 a is attached to the tip end portion of the main shaft 62 a protruding from the other side surface of the casing 61. Inside the switch 71, a worm wheel (not shown) attached to the tip of the main shaft 62a is installed. A worm gear (not shown) provided at one end of the handle shaft 72 is engaged with the worm wheel. The handle shaft 72 has an elongated cylindrical shape. A handle 73 that rotates the handle shaft 72 is provided at the other end of the handle shaft 72.

  When the handle 73 is rotated in one direction, the main shaft 62a and the blade 63 are rotated in the direction of the arrow D1 shown in FIG. 9C, for example, via the handle shaft 72 and the switch 71. In conjunction with this, the bell crank 68b rotates in the direction of the arrow D2. Accordingly, the parallel connection plate 64b connected to the bell crank 68b slides in the direction of the arrow D3, and the reverse connection plate 67 connected to the bell crank 68b slides in the direction of the arrow D4. In conjunction with the movement of the reverse connecting plate 67, the bell crank 68a connected to the reverse connecting plate 67 and the slave shaft 62b connected to the bell crank 68a rotate in the direction of the arrow D5. As a result, the parallel connecting plate 64a connected to the bell crank 68a slides in the direction of the arrow D6. In conjunction with the movement of the parallel connecting plate 64a, the parallel connecting arm 65c, the driven shaft 62b connected to the parallel connecting arm 65c, and the blade 63 attached to the driven shaft 62b are in the direction of the arrow D7. Rotate. Similarly, the other driven shaft 62b other than that shown in FIG. 9C also rotates in conjunction with the movement of the parallel connecting plates 64a and 64b, so that the inclination angles of each of the plurality of blades 63 in the casing 61 are increased. Changes, and the amount of air passing through the casing 61 can be adjusted.

  Since the air volume adjusting damper 60 has a structure in which a maximum of 11 slave shafts 62b are connected to one main shaft 62a, the number of connecting parts such as connecting arms and the number of connecting portions are large. Since the connecting portion is provided with an assembly (gap) portion necessary for moving the damper component, the blade 63 vibrates when such an air volume adjusting damper 60 is installed at a high wind speed or high voltage location, for example. At the same time, there is a problem that the vibration is concentrated on the asobi portion and the durability is lowered due to wear and damage of the parts.

  In order to solve such a problem, there exists a technique for connecting a plurality of shafts without using a connecting arm (for example, see Patent Document 1). In the air volume adjusting device described in Patent Document 1, when two drive members are simultaneously reciprocated using an operation handle, the air volume adjusting device is moved into the casing by the action of a crank member that connects these drive members and the blades or shafts. It is possible to obtain an air volume adjusting function by rotating a plurality of arranged blades and changing the respective inclination angles to change the opening degree. In this case, since the reciprocating movement of the drive member is converted into the rotation of the blade or the shaft through the crank member, the conventional connecting arm is unnecessary.

JP 2007-107816 A

  However, the air volume adjusting device described in Patent Document 1 cannot use a conventional connecting component such as a connecting arm. That is, it is necessary to prepare a crank member attached to each blade instead of the connecting arm and a driving member connected to the crank member. Moreover, it is necessary to prepare the crank member attached to each blade | wing as many as the number of blades, and the number of parts increases.

  The present invention has been made in view of the above-described conventional problems, and it is an object of the present invention to provide an air volume adjusting damper that prevents damage to parts due to vibration only by devising a way of connecting connecting arms. To do.

In order to achieve the above object, an air volume adjusting damper according to the present invention includes a main shaft that directly receives a turning force by a handle operation, and a slave shaft that indirectly receives the turning force by the handle operation via the main shaft and rotates. And a pair of air flow adjustment dampers for adjusting the air flow by adjusting the opening and closing angles of the blades attached respectively to the main shaft, and a pair of units connected to the main shaft by a connecting arm. A worm wheel attached to the main shaft, a worm gear meshing with the worm wheel, a handle shaft to which the worm gear is attached, and a handle for rotating the handle shaft. A switch is provided, and the turning force of the handle shaft can be transmitted to the main shaft, and the connection arm and the main shaft or the sub shaft are in contact with each other. A groove in a portion, characterized in that the are detachably coupled provided with projections which fit into the groove.

In the air volume adjusting damper, the connecting arm and the main shaft or the slave shaft are detachably connected to each other.
In the air volume adjusting damper, the tip end portions of the main shaft and the slave shaft are projected outside the one side surface of the casing, and the tip portions of the main shaft and the slave shaft are connected to each other by the connecting arm on the outside. It is characterized by.

  According to the present invention, the air volume adjusting damper has a plurality of a pair of units in the casing in which one driven shaft is connected to one main shaft by a connecting arm. The number of connection points can be reduced, and the number of play points necessary for moving the parts can be reduced. In this way, it is possible to prevent component damage due to vibration only by devising a way of connecting the connecting arms.

It is a front view of the air volume adjustment damper which concerns on embodiment of this invention. It is one side view of the air volume adjustment damper which concerns on the same embodiment. It is the other side view of the air volume adjustment damper which concerns on the same embodiment. It is an enlarged view of the A section shown in FIG. It is explanatory drawing of the structure of the switch concerning the embodiment. It is explanatory drawing of a movement of a connection arm and a blade | wing when the handle concerning the embodiment is rotated. It is a front view of the conventional air volume adjustment damper. It is a side view of the conventional air volume adjustment damper. (A) is the enlarged view of the B section shown in FIG. 7, (b) is a plan view of the B section, and (c) is a side view of the B section.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 is a front view of an air volume adjusting damper according to an embodiment of the present invention, FIG. 2 is a side view of one side, and FIG. 3 is a side view of the other side.

  The air volume adjusting damper 10 includes a cylindrical casing 11 having an opening for allowing air from an air outlet such as an air conditioning duct to pass therethrough and having a rectangular front shape. Along the rectangular frame of the casing 11, an upstream flange 19a is attached to the upstream side, and a downstream flange 19b is attached to the downstream side.

  In the casing 11, three main shafts 12 and three slave shafts 13 are alternately arranged in the horizontal direction. Both end portions of the main shaft 12 and the slave shaft 13 pass through both side surfaces of the casing 11 and are rotatably supported. Each of the three main shafts 12 and the three following shafts 13 is attached with a rectangular plate-like blade 14 for adjusting the air volume by changing the inclination.

  A tip end portion of each driven shaft 13 protruding outside one side surface of the casing 11 is pivotally supported by a bearing 20. The front end portion of each main shaft 12 protruding outside one side surface of the casing 11 is covered with a switch 16 for rotating each main shaft 12. Each switch 16 has an elongated handle shaft 18 extending therethrough. Of the three switches 16, the uppermost switch 16 has the handle shaft 18 passing through only the lower part, and the other two switches 16 have the handle shaft 18 passing through the upper part and the lower part. A worm gear (not shown), which will be described in detail later, is provided at a portion where the handle shaft 18 is covered with the switch 16. Inside the switch 16, the worm gear and a worm wheel (not shown) attached to the main shaft 12 mesh with each other so that the rotational force of the handle shaft 18 can be transmitted to each main shaft 12. A handle 17 for rotating the handle shaft 18 is attached to the lower end of the handle shaft 18.

  As shown in FIGS. 2 and 6, an L-shaped connecting arm 15 b forming a link mechanism is connected to the ends of the main shaft 12 and the driven shaft 13 projecting outside the other side surface of the casing 11. Has been. The connecting arm 15b of the main shaft 12 and the connecting arm 15b of the slave shaft 13 disposed adjacent to the main shaft 12 are connected by a rectangular plate-shaped connecting arm 15a that transmits a reverse force. The connecting arm 15 a is arranged so as to skew a straight line connecting the center of the main shaft 12 and the center of the driven shaft 13. The main shaft 12 and the slave shaft 13 connected by these connecting arms 15 a and 15 b form a pair of units as a link mechanism that transmits a reverse force from the main shaft 12 to the slave shaft 13. Thus, by forming the pair of units not as a parallel link mechanism but as a link mechanism that transmits a reversal force, the arm lengths of the connecting arms 15a and 15b can be shortened, whereby the width of the side surface of the casing 11 can be reduced. Can be shortened.

  FIG. 4 is an enlarged view of a portion A (a connecting portion between the driven shaft 13 and the connecting arm 15b) shown in FIG. As shown in the figure, a bearing 20 and an L-shaped connecting arm 15b pass through an end portion of the driven shaft 13 protruding to the outside of the casing 11. A groove 13a is provided on the side of the slave shaft 13 and a protrusion 15c is provided on the side of the connection arm 15b at a portion where the slave shaft 13 and the connection arm 15b are in contact with each other. By fitting the groove 13a and the protrusion 15c, the driven shaft 13 and the connecting arm 15b can be detachably connected without welding. The bearing 20 is fixed to the casing 11 with bolts 21. The end of the connecting arm 15b is connected to the end of the connecting arm 15a by a bolt 22.

Since the follower shaft 13 and the connecting arm 15b are detachably connected in this way, maintenance is easier than when welding. The groove may be provided on the connecting arm 15b side and the protrusion may be provided on the driven shaft 13 side. Moreover, a bolt can also be used as a method of detachably connecting the driven shaft 13 and the connecting arm 15b. The slave shaft 13 and the connecting arm 15b may be connected so as not to be detachable by welding.
The joint between the main shaft 12 and the connecting arm 15b has the same configuration as described above.

  FIG. 5 is an explanatory diagram of the configuration of the switch 16 installed at the top of the three switches 16 shown in FIG. As shown in the figure, the switch 16 includes a switch cover 161 that covers the outside. A handle bearing 162 for supporting the handle shaft 18 is provided below the switch cover 161. Inside the switch cover 161, a worm wheel 164 attached to the tip of the main shaft 12 and a worm gear 163 attached to the handle bearing 162 are engaged with each other.

  When the handle 17 is rotated in one direction, the handle shaft 18 attached to the handle 17 is rotated, and the worm gear 163 attached to the handle shaft 18 is rotated in conjunction therewith. Further, the worm wheel 164 engaged with the worm gear 163 rotates, and the main shaft 12 rotates in conjunction with the rotation.

  As shown in FIG. 6, for example, when the main shaft 12 rotates in the direction of the arrow X, the blade 14 attached to the main shaft 12 also rotates in the direction of the arrow X around the main shaft 12. In conjunction with this, the connecting arm 15b connected to the main shaft 12 also rotates in the direction of the arrow X. In conjunction with this, the connecting arm 15a connected to one end of the connecting arm 15b slides in the direction of arrow Y. Thereby, the connection arm 15b connected to the other end of the connection arm 15a rotates in the direction of the arrow Z. In conjunction with this, the driven shaft 13 also rotates in the direction of arrow Z, and the blade 14 attached to the driven shaft 13 also rotates in the direction of arrow Z around the driven shaft 13. Thereby, since the inclination angle of each of the plurality of blades 14 in the casing 11 changes by a certain angle, the air volume passing through the casing 11 can be adjusted.

  As described above, a pair of units in which one slave shaft 13 is connected to one main shaft 12 by connecting arms 15a and 15b are arranged in a plurality of stages in parallel in the casing 11. Compared to connecting a plurality of slave shafts to the main spindle of the book, the number of connecting parts that cause vibration transmission can be reduced, and the number of play points can be reduced. Therefore, it is possible to prevent concentration of vibrations on the connection portion, to prevent wear and damage of parts resulting from vibrations, and to improve durability. Further, it is possible to easily prevent vibrations and prevent damage to parts without preparing new parts by merely changing the way of connecting the connecting arms used conventionally.

The number of units to be connected can be determined in accordance with the size of the casing 11 and the size of the air conditioning duct or fan in which the air volume adjustment damper 10 is installed.
Further, the tip end portions of the main shaft 12 and the slave shaft 13 are projected outside the casing 11, and the tip portions of the main shaft 12 and the slave shaft 13 are connected by the connecting arms 15a and 15b on the outside of the casing 11, so that the inside of the casing 11 is formed. Even when salt is contained in the flowing air, it is not affected by salt damage, so that it is possible to prevent parts such as the connecting arm 15, the main shaft 12, and the driven shaft 13 from being rusted and fixed. Further, even when high pressure or turbulent flow is generated, by providing the connecting component outside the casing 11, vibration of the connecting component can be prevented.

Further, since the connecting arms 15a and 15b and the main shaft 12 and the driven shaft 13 are detachably connected, the replacement work of the connecting arms 15a and 15b and the maintenance work even when the connecting arms 15a and 15b are damaged. Can be easily performed.
Thus, since the air volume adjusting damper 10 is not damaged by vibration, it can be installed at a high wind speed and high pressure location.

  The air volume adjustment damper according to the present invention can be installed in a duct or fan of any equipment. For example, the air volume adjustment damper according to the present invention can be installed in a nuclear power generation facility. By using such an air volume adjustment damper for nuclear power generation facilities, durability can be improved, so that work time in human nuclear power generation facilities related to inspection and replacement of air volume adjustment dampers can be shortened, etc. There are benefits.

10 ......... Air volume adjusting damper, 11 ......... Case, 12 ......... Main shaft, 13 ......... Sub shaft, 13a ......... Groove, 14 ......... Vane, 15a, 15b ......... Connecting arm, 15c ... ...... Protrusions, 16 ......... Switch, 161 ......... Switch cover, 162 ......... Handle bearing, 163 ......... Worm gear, 164 ......... Worm wheel, 17 ......... Handle, 18 ......... Handle Shaft, 19a ... upstream flange, 19b downstream flange, 20 ... bearing, 21 ... bolt, 22 ... bolt.

Claims (2)

The air volume is adjusted by adjusting the opening and closing angles of the blades respectively attached to the main shaft that directly receives the turning force by the handle operation and the slave shaft that indirectly receives the turning force by the handle operation and rotates. An air volume adjustment damper to be adjusted,
A plurality of units in which one follower shaft is connected to one main shaft by a connecting arm are arranged in a plurality of rectangular cylindrical casings through which wind passes ,
A worm wheel attached to the main shaft; a worm gear meshing with the worm wheel; a handle shaft to which the worm gear is attached; and a switch having a handle for rotating the handle shaft; Can be communicated to
The air flow adjusting damper, wherein the connecting arm and the main shaft or the slave shaft are detachably connected to each other by providing a groove at a contact portion and a protrusion fitted into the groove . The front end portion of the main shaft and the slave shaft protrudes outside the one side surface of the casing, and the front end portion of the main shaft and the sub shaft is connected by the connecting arm on the outer side. air volume adjustment damper according to 1.

Images