A vortex-shaped manual automatic precision adjustable constant power water cooling load

Abstract

The present invention relates to the field of resistor technology, and specifically to a vortex-wire type manual automatic precision adjustable constant power water-cooled load, each resistor unit includes a support plate, a spirally arranged resistor bar is arranged on the side of the support plate, a swing rod is arranged on the side of the support plate, and a moving contact is slidably arranged on the swing rod. The moving contact elastically resists the resistor bar as the output end; the present invention carries the resistor on the support plate and winds it into a spiral vortex shape, which greatly saves the use space and improves the load power; the moving contact can move along the resistor bar to achieve real-time adjustment of the working process, and can meet the stepless adjustment of the precise load power. The change of the moving contact position actually changes the load length of the vortex-wire resistor, and there is no need to change at least one circle each time like a traditional sliding rheostat, so the adjustment accuracy is higher. The bottom surface of the support plate is provided with a spirally arranged water-cooling pipe, and the water-cooling pipe and the resistor bar are aligned with each other, which can accurately cool, have high cooling efficiency, and be noise-free.

Description

Technical Field

[0001] The invention relates to the technical field of resistors, and in particular to a vortex-wire type manually-automatically precisely adjustable constant-power water-cooling load. Background Art

[0002] With the gradual development of new energy and various power generation equipment manufacturing and development, test loads are used more and more widely, and the requirements for loads are getting higher and higher, requiring larger power, high test accuracy, and the ability to adapt to the environment.

[0003] Especially for indoor testing or installation, the traditional load resistor stack is relatively crude, large in size, and easily affected by the use environment. The traditional air-cooled load generates a lot of noise, and the air flow cooling is not as good as the water cooling. The previous spiral translation roller sliding rheostat changes at least one winding each time it slides, has a small adjustment accuracy, low power adjustment, and cannot accurately control the test according to the actual working conditions. Summary of the invention

[0004] In view of the above technical problems in the prior art, the present invention provides a vortex-shaped linear manual automatic precision adjustable constant power water cooling load.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] Provided is a vortex-line type manual automatic precision adjustable constant power water-cooled load, comprising more than two resistor units arranged in a stacked manner, a support plate for each resistor unit, a side surface of the support plate being provided with a spirally arranged resistor bar, a bottom surface of the support plate being provided with a spirally arranged water-cooling pipe, and the water-cooling pipe and the resistor bar are aligned with each other, the resistor bar and the support plate are insulated from each other, a swing rod is provided on the side of the support plate, a moving contact is slidably provided on the swing rod, and the moving contact, as an output end, elastically abuts against the resistor bar; the resistor unit also comprises a first driving mechanism for driving the swing rod to swing above the resistor bar and a second driving mechanism for driving the moving contact to move along the swing rod.

[0007] Specifically, the moving contact includes a conductive rotating wheel, a mounting seat, an elastomer and a sliding seat. The sliding seat can be slidably and insulated from being installed on the rocker arm. A sleeve is provided at the bottom of the sliding seat. The mounting seat is partially embedded in the sleeve upward. The elastomer is located in the sleeve and applies force downward to the mounting seat. The rotating wheel is installed on the mounting seat and can resist the movement of the resistor bar.

[0008] Specifically, the rotating wheel is an I-shaped carbon brush; and / or the rotating wheel is rotatably mounted on the mounting seat.

[0009] Specifically, the elastic body includes a spring and a copper strip that can be bent and deformed longitudinally, and the spring and the copper strip together press downward against the mounting seat.

[0010] Specifically, the second driving mechanism includes a lead screw and a transverse stepping motor driving the lead screw to rotate, the output shaft of the transverse stepping motor and the lead screw are insulated from each other, the lead screw is rotatably arranged along the rocker, and the slide seat and the lead screw are threadedly connected.

[0011] Specifically, the support plate is provided with a terminal block, and the terminal block and one end of the resistor bar and the terminal block and the lead screw are electrically connected through conductive strips.

[0012] Specifically, a manual adjustment handle is provided on the top of the slide seat.

[0013] Specifically, the first driving mechanism includes a longitudinal stepping motor which is arranged longitudinally and can rotate forward and reversely, and an output shaft of the longitudinal stepping motor is fixedly connected to the rocker arm.

[0014] Specifically, a spiral groove is provided on the side of the support plate, and the resistor bar is embedded in the groove.

[0015] Specifically, the support plate is a polypropylene plate.

[0016] Beneficial effects of the present invention:

[0017] The vortex-line type manual automatic precision adjustable constant power water cooling load of the present invention has the following advantages:

[0018] 1. The resistor is mounted on the support plate and wound into a spiral vortex shape, which greatly saves the use space and increases the load power; precise cooling, high cooling efficiency and no noise;

[0019] 2. The moving contact can move along the resistor strip. In practice, the resistance value can be adjusted manually, or it can be adjusted electrically through the first drive mechanism and the second drive mechanism, so as to realize real-time adjustment of the working process and meet the stepless adjustment of precise load power;

[0020] 3. The moving contact is the output point of the resistor bar. The change of the moving contact position actually changes the load length of the vortex resistor. There is no need to change at least one circle each time like a traditional sliding rheostat, so the adjustment accuracy is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a vortex-type manual automatic precision adjustable constant power water cooling load in an embodiment.

[0022] Figure 2 Schematic diagram of the structure of a single resistor unit in the embodiment.

[0023] Figure 3 It is a structural schematic diagram and a partial enlarged view of the resistor unit in the embodiment with the support plate and the resistor strip hidden.

[0024] Figure 4Schematic diagram of the structure of the moving contact in the embodiment.

[0025] Figure 5 It is an exploded and enlarged view of the moving contact in the embodiment.

[0026] Figure 6 Schematic diagram of the structure of the support plate and the resistor bar in the embodiment.

[0027] Figure 7 Schematic diagram of the structure of the bottom surface of the support plate in the embodiment.

[0028] Reference numerals:

[0029] Support plate 1, resistance bar 2, swing rod 3;

[0030] Moving contact 4, rotating wheel 41, mounting seat 42, elastic body 43, spring 431, copper belt 432, sliding seat 44, sleeve 45, manual adjustment handle 46;

[0031] Terminal block 5, conductive strip 6;

[0032] Lead screw 7, transverse stepping motor 8, longitudinal stepping motor 9;

[0033] Photoelectric switch 10. DETAILED DESCRIPTION

[0034] The present invention is described in detail below in conjunction with specific embodiments and drawings.

[0035] A vortex-shaped linear manual automatic precision adjustable constant power water cooling load of this embodiment, such as Figures 1 to 7 As shown, it includes four stacked resistor units, each resistor unit support plate 1, the top surface of the support plate 1 is provided with a spiral groove, the groove is inlaid with a spiral resistor bar 2, and the support plate 1 is a high temperature resistant, acid and alkali resistant and insulating plate, such as a polypropylene plate, so as to achieve mutual insulation between the resistor bar 2 and the support plate 1. In practice, it can be changed to a metal plate, but an insulating layer needs to be coated in the groove. In general, the resistor bar 2 and the support plate 1 need to be kept insulated.

[0036] The bottom surface of the support plate 1 is provided with a spirally arranged water cooling pipe 11, and the water cooling pipe 11 is aligned with the resistance bar 2. When in use, tap water or ice water flows through the water cooling pipe 11 to take away heat.

[0037] A horizontal rocker arm 3 is arranged on the side (top) of the support plate 1, and a moving contact 4 is slidably arranged on the rocker arm 3. The moving contact 4 serves as an output end and elastically presses downward against the resistor bar 2. The support plate 1 is provided with a terminal block 5. The terminal block 5 is connected to the spiral center end of the resistor bar 2 through a conductive strip 6 located below the support plate 1, which serves as one lead end of the resistor, and the other lead end is the moving contact 4. In this way, when the moving contact 4 moves to different positions, the load length of the resistor bar 2 is different. In this embodiment, the moving contact 4 also optimizes the lead-out method through other structures, which is described in detail below.

[0038] In this embodiment, the moving contact 4 includes a rotating wheel 41, a mounting seat 42, an elastic body 43 and a sliding seat 44, which are all conductive. The sliding seat 44 can be slidably and insulated to be mounted on the swing rod 3. The swing rod 3 is made of insulating material. A sleeve 45 is provided at the bottom of the sliding seat 44. The top of the mounting seat 42 is embedded in the sleeve 45 upward. The elastic body 43 is located in the sleeve 45 and exerts force downward on the mounting seat 42. The rotating wheel 41 is rotatably mounted on the mounting seat 42 and can elastically move downward against the resistor bar 2. The rotating wheel 41 is an I-shaped carbon brush. The elastic body 43 includes a spring 431 and a copper strip 432 that can be bent and deformed longitudinally. The spring 431 and the copper strip 432 jointly press downward against the mounting seat 42, wherein the spring 431 is used for vibration reduction and fastening, and the copper strip 432 is used as a conducting conductor. After the resistance strip 2 is loaded, the current is sequentially transmitted to the rotating wheel 41, the mounting seat 42, the copper belt 432 and the sliding seat 44, thereby facilitating the next step of conduction.

[0039] In order to facilitate the electric adjustment of the position of the moving contact 4, the resistor of this embodiment also includes a first driving mechanism for driving the rocker 3 to swing above the resistor bar 2 and a second driving mechanism for driving the moving contact 4 to move along the rocker 3. The second driving mechanism includes a screw rod 7 and a transverse stepping motor 8 for driving the screw rod 7 to rotate. The output shaft of the transverse stepping motor 8 is insulated from the screw rod 7. The screw rod 7 is rotatably arranged along the rocker 3. The slide 44 is threadedly connected to the screw rod 7. When the screw rod 7 rotates, it can drive the moving contact 4 to move along the rocker 3. In this way, the current of the slide 44 will eventually be transmitted to the screw rod 7. The end of the screw rod 7 serves as the wiring point for the next step. In order to prevent the current from affecting the transverse stepping motor 8, insulation measures are taken between it and the screw rod 7. For example, the coupling is made of plastic, or the surface is coated with insulating paint. Then the screw rod 7 is also electrically connected to the above-mentioned terminal block 5 through the conductive strip 6. Since the screw rod 7 is rotating, the conductive strip 6 and the screw rod 7 can be abutted to prevent the conductive strip 6 from rotating. Specifically, a manual adjustment handle 46 is provided on the top of the slide 44, which is convenient for manually changing the position of the moving contact 4 when the debugging section is powered off. The first driving mechanism includes a longitudinal stepping motor 9 arranged longitudinally and capable of forward and reverse rotation, and the output shaft of the longitudinal stepping motor 9 is fixedly connected to the swing rod 3.

[0040] Multiple resistor units can be combined and stacked to achieve expansion. Removable threaded support studs are installed above and below the load resistor support plate 1 to connect multiple resistor units. Then, multiple resistors are connected in parallel at a certain voltage to increase the main circuit current and expand the load power.

[0041] Load wiring method:

[0042] Resistor access endpoint-----the central starting point of the vortex-shaped resistor is used as the fixed contact, which is connected to the circuit input terminal; the adjusting moving contact 4 is connected to the power output terminal.

[0043] Theoretical principle:

[0044] ① Resistance determination formula-----R=ρL / S (where ρ represents the resistivity of the resistor, which is determined by its own properties, L represents the length of the resistor, and S represents the cross-sectional area of ​​the resistor);

[0045] ②The relationship between power and resistance----According to Ohm's law I=U / R and the power formula P=UI, it can be concluded that P=I*IR=(U*U) / R;

[0046] ③ Step position adjustment principle----Photoelectric switches 10 are respectively set on both sides of the pendulum 3 of the support plate 1, and the two photoelectric switches 10 are used to determine whether the pendulum 3 is on the left or right side of the resistor area (the principle is to set a light transmitter on the pendulum 3, and the photoelectric switch 10 responds when receiving light). Taking the length direction of the pendulum 3 as front and back, and the width direction as left and right, on the left side of the resistor area, the moving contact 4 moves forward, the load length of the resistor bar 2 decreases, and moves backward, the load length of the resistor bar 2 increases; similarly, on the right side of the resistor area, the opposite is true. After determining the left and right areas, the moving contact 4 is controlled to slide in one direction, and then the longitudinal stepper motor 9 continuously controls the pendulum 3 to swing slightly left and right to make it slide along the track of the resistor bar 2; until it slides out to the area of ​​another photoelectric switch 10, the transverse stepper motor 8 moves in the opposite direction, and the pendulum 3 still swings slightly left and right to run along the resistor track, and so on for periodic motion.

[0047] From the above, we can see that:

[0048] 1) In manual use mode, the handle above the moving contact 4 is used to move the resistor bar 2 along the track to reach the position of the specified resistance value or load power value;

[0049] 2) In the automatic control mode of the stepper motor, the upper computer communicates with the two servo motors and collects parameters to control their left and right and forward and backward movements respectively. After the program passes through the detection area of ​​the radio and television switch, one moves in a straight line and the other swings, making it slide around the track, thereby moving to a set position on the vortex resistance track.

[0050] In the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A vortex-line type manual automatic precision adjustable constant power water cooling load, characterized by: It comprises two or more resistor units arranged in a stacked manner, each resistor unit comprises a support plate, the top surface of the support plate is provided with a spirally arranged resistor bar, the bottom surface of the support plate is provided with a spirally arranged water-cooling pipe, and the water-cooling pipe and the resistor bar are aligned with each other, the resistor bar and the support plate are insulated from each other, a swing rod is provided on the side of the support plate, and a moving contact is slidably provided on the swing rod, and the moving contact, as an output end, elastically resists the resistor bar; the resistor unit also comprises a first driving mechanism for driving the swing rod to swing above the resistor bar and a second driving mechanism for driving the moving contact to move along the swing rod; the moving contact comprises a rotating wheel, a mounting seat, an elastic body and a sliding seat, which are all conductive, and the sliding seat is slidably and insulated from being mounted on the swing rod, a sleeve is provided at the bottom of the sliding seat, and the mounting seat is partially embedded in the sleeve upward, the elastic body is located in the sleeve and applies force downward to the mounting seat, the rotating wheel is mounted on the mounting seat and can resist the movement of the resistor bar; a manual adjustment handle is provided on the top of the sliding seat.

2. According to claim 1, a vortex-line type manual automatic precision adjustable constant power water cooling load is characterized by: The rotating wheel is an I-shaped carbon brush; and / or the rotating wheel is rotatably mounted on the mounting seat.

3. According to claim 1, a vortex-line type manual automatic precision adjustable constant power water cooling load is characterized by: The elastic body comprises a spring and a copper belt which can be bent and deformed longitudinally, and the spring and the copper belt press downward against the mounting seat together.

4. The vortex-line type manual automatic precision adjustable constant power water cooling load according to claim 1 is characterized by: The second driving mechanism includes a screw and a transverse stepping motor driving the screw to rotate. The output shaft of the transverse stepping motor and the screw are insulated from each other. The screw is rotatably arranged along the swing rod, and the slide seat is threadedly connected to the screw.

5. The vortex-line type manual automatic precision adjustable constant power water cooling load according to claim 4 is characterized by: The support plate is provided with a terminal block, and the terminal block and one end of the resistor bar and the terminal block and the lead screw are electrically connected respectively through conductive strips.

6. The vortex-line type manual automatic precision adjustable constant power water cooling load according to claim 1 is characterized by: The first driving mechanism comprises a longitudinal stepping motor which is arranged longitudinally and can rotate forward and reversely, and the output shaft of the longitudinal stepping motor is fixedly connected to the rocker arm.

7. The vortex-line type manual automatic precision adjustable constant power water cooling load according to claim 1 is characterized by: The side surface of the supporting plate is provided with a spiral groove, and the resistance strip is embedded in the groove.

8. The vortex-line type manual automatic precision adjustable constant power water cooling load according to claim 1 is characterized by: The support plate is polypropylene board.

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