Horizontal speed reducer

Abstract

The utility model discloses a horizontal speed reducer which comprises a shell and a plurality of mutually embedded gears installed in the shell, the gears are provided with a plurality of permanent magnets, the shell is provided with a plurality of groups of conductive coils, one side of the shell is provided with a thermoelectric refrigeration device, the refrigeration end of the thermoelectric refrigeration device is arranged close to the gears, and the refrigeration end of the thermoelectric refrigeration device is arranged close to the gears. And the thermoelectric refrigeration device is electrically connected with the conductive coil. According to the technical scheme, rotation kinetic energy of the gear is captured and converted into self-powered electric energy, the thermoelectric refrigeration device is driven to actively transfer heat in the speed reducer, the heat in the speed reducer is rapidly reduced, and dual improvement of energy utilization and heat dissipation efficiency is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of speed reducer, especially a horizontal speed reducer. BACKGROUND

[0002] As the core component of industrial transmission system, horizontal speed reducer is long-term faced with temperature rise problem caused by high load operation. Traditional heat dissipation scheme depends on air cooling, oil cooling or water cooling technology: air cooling is easy to be affected by environmental dust pollution and the heat dissipation efficiency fluctuates with air temperature; oil cooling and water cooling need to rely on circulating pipeline and external pumping equipment, which has the disadvantages of complex structure, high energy consumption and high maintenance cost. In addition, a large amount of mechanical energy generated in the meshing process of speed reducer gear is dissipated in the form of friction heat, which not only aggravates the internal temperature rise, but also does not effectively recycle the rotational kinetic energy, resulting in low energy utilization rate.

[0003] The above-mentioned traditional heat dissipation mode is limited by passive heat exchange mechanism, and it is difficult to realize rapid temperature control in a closed space, and the external energy dependence is strong (such as water pump / fan power supply). At the same time, the mechanical energy of the speed reducer is not recycled, causing energy waste. In view of this, a new type of technology integrating energy recovery and active heat dissipation is needed to break through the environmental constraints of traditional heat dissipation mode and realize the double improvement of energy utilization and heat dissipation efficiency. SUMMARY

[0004] The main purpose of the utility model is to provide a horizontal speed reducer, which aims to solve the technical problems of the prior art.

[0005] To achieve the above-mentioned purpose, the utility model provides a horizontal speed reducer, which comprises a shell and a plurality of gears arranged in each other in the shell, the gears are provided with a plurality of permanent magnets, the shell is provided with a plurality of conductive coils, one side of the shell is provided with a thermoelectric refrigeration device, the refrigeration end of the thermoelectric refrigeration device is close to the gears, and the thermoelectric refrigeration device is electrically connected with the conductive coils.

[0006] Optionally, the thermoelectric refrigeration device comprises a thermoelectric ring and a heat pipe, the thermoelectric ring is sleeved on the rotating shaft of the gear and is rotationally connected, and the heat pipe is connected with the thermoelectric ring and the shell respectively.

[0007] Preferably, the thermoelectric ring is provided with a temperature sensor on the side close to the rotating shaft of the gear.

[0008] Preferably, the thermoelectric ring is composed of bismuth telluride alloy.

[0009] Preferably, the shell is provided with a heat dissipation fan on the outside at the connection between the heat pipe and the shell.

[0010] Optionally, the shell is provided with a plurality of heat conduction plates on the inside, and the conductive coils are arranged on the heat conduction plates.

[0011] Preferably, the gear is provided with an annular groove along the circumference, and the permanent magnets are uniformly embedded in the annular groove.

[0012] The technical scheme of the utility model has the following beneficial effects: the technical scheme of the utility model converts the rotating kinetic energy of the capturing gear into self-power supply energy, drives the thermoelectric refrigeration device (based on Peltier effect) to actively transfer the heat in the speed reducer, rapidly reduces the heat in the speed reducer, and realizes double promotion of energy utilization and heat dissipation efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in the drawings without creative labor.

[0014] Fig. 1 It is a sectional view of a horizontal speed reducer of an embodiment of the utility model;

[0015] Fig. 2 It is a gear structure schematic view of a horizontal speed reducer of an embodiment of the utility model.

[0016] The realization, functional characteristics and advantages of the utility model will be further described with reference to the drawings in combination with the embodiments.

[0017] The drawings are as follows: 1, shell; 2, gear; 3, thermoelectric refrigeration device; 4, heat dissipation fan; 11, conducting coil; 21, permanent magnet; 22, annular groove; 31, thermoelectric ring; 32, heat pipe; 33, temperature sensor. DETAILED DESCRIPTION

[0018] The technical scheme in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0019] It should be noted that all directionality indications (such as up, down, left, right, front, back...) in the embodiments of the utility model are only used to explain the relative position relationship, movement condition and the like between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0020] In addition, the technical solutions among various embodiments can be combined with each other, but the combination of the technical solutions should be based on the fact that the combination can be realized by the person skilled in the art, and when the combination of the technical solutions cannot be realized or contradicts each other, it should be considered that the combination of the technical solutions does not exist and is not within the protection scope required by the utility model.

[0021] The utility model provides a horizontal speed reducer.

[0022] As Figs. 1-2 As shown in the utility model embodiment, the horizontal speed reducer comprises a shell 1 and a plurality of mutually embedded gears 2 installed in the shell 1, a plurality of permanent magnets 21 are arranged on the gears 2 and can be embedded in the circumferential surface of the gears 2, a plurality of groups of conductive coils 11 are arranged on the inner side of the shell 1, the conductive coils 11 are connected in parallel, a thermoelectric refrigeration device 3 is installed on one side of the shell 1, the refrigeration end of the thermoelectric refrigeration device 3 is close to the gears 2, the thermoelectric refrigeration device 3 is electrically connected with the conductive coils 11, the gears 2 drive the permanent magnets 21 to rotate when rotating, so that the conductive coils 11 cut the magnetic induction lines to generate current, thereby driving the thermoelectric refrigeration device 3 to cool the inside of the speed reducer.

[0023] The shell 1 is a split type cast aluminum alloy shell body, the inside of the shell 1 is provided with a gear 2 mounting cavity, the gear 2 group comprises an input shaft gear 2, an intermediate idler gear and an output shaft gear 2, and the shafts of the gears 2 are installed on the shell 1 through roller bearings. The circumferential surface of each gear 2 is processed with an annular groove 22, the groove is fixed with a neodymium-iron-boron permanent magnet 21 by epoxy resin glue, adjacent permanent magnets 21 are staggered in polarity (N-S-N-S) to form an alternating magnetic field. A plurality of groups of copper conductive coils 11 are installed on the inner wall of the shell 1 corresponding to the positions of the gears 2, the coils are fixed through insulating supports, and the coil leads are connected to the terminal on the top of the shell 1. A semiconductor refrigeration sheet (TEC) is installed on the side surface of the shell 1, the cold end of the semiconductor refrigeration sheet (TEC) is attached to the shaft end of the gear 2, and the hot end is connected with a heat dissipation fin. The induced current generated by the conductive coils 11 drives the TEC to work after passing through a rectifier circuit. The permanent magnets 21 can also be magnetic steel blocks embedded in the inside of the gears 2 instead of the surface groove form; the conductive coils 11 can be replaced by printed circuit board (PCB) coils which are directly integrated on the inner wall of the shell 1; and the thermoelectric refrigeration device 3 can adopt a multi-stage TEC series structure to improve the refrigeration capacity.

[0024] Optionally, the thermoelectric refrigeration device 3 comprises a thermoelectric ring 31 and a heat pipe 32, the thermoelectric ring 31 is sleeved on the rotating shaft of the gear 2 and is rotationally connected, so that the gear 2 can rotate freely, and the heat pipe 32 is connected with the thermoelectric ring 31 and the shell 1 respectively, when the thermoelectric ring 31 is driven, the end close to the gear 2 starts to cool, absorbs the heat of the gear 2, and conducts the heat to the shell 1 through the heat pipe 32 to dissipate heat.

[0025] Optionally, the thermoelectric ring 31 can be composed of two concentric ring-shaped semiconductor elements (P-type / N-type bismuth telluride), the inner ring is connected to the shaft of the gear 2 through a ceramic bearing sleeve, and the outer ring is welded to the inner wall of the heat pipe 32. When the shaft of the gear 2 rotates, the thermoelectric ring 31 remains stationary. The heat pipe 32 is a copper sintered heat pipe 32, one end of which is welded to the outer ring of the thermoelectric ring 31, and the other end extends to the heat dissipation area at the top of the shell 1. The heat pipe 32 is filled with ammonia working medium, and phase change heat transfer is used. The thermoelectric ring 31 can also be designed as a split type, composed of multiple arc-shaped thermoelectric pieces surrounding the shaft, which is convenient for installation and maintenance. The heat pipe 32 can be replaced by a uniform temperature plate or a liquid cooling circuit, and a fan is added to the heat dissipation end to force convection.

[0026] Preferably, a temperature sensor 33 is arranged on the side of the thermoelectric ring close to the rotating shaft of the gear 2, which can monitor the temperature of the gear 2 and the thermoelectric ring 31 in real time.

[0027] Optionally, a Pt100 platinum resistance temperature sensor 33 is embedded in the surface of the inner ring of the thermoelectric ring 31, the signal line is led out along the groove of the outer ring of the thermoelectric ring 31, and the external controller is connected through the brush slip ring to avoid wire winding. Control logic, when the sensor detects that the shaft temperature exceeds 60℃, the controller increases the current to increase the refrigeration power of the thermoelectric ring 31. An infrared non-contact temperature sensor 33 can also be used to send temperature data through a wireless transmission module (such as ZigBee). The sensor can be integrated inside the shaft of the gear 2, and the signal is transmitted through a magnetic coupler.

[0028] Preferably, the thermoelectric ring is made of bismuth telluride alloy to reduce cost.

[0029] Among them, the material ratio is: bismuth telluride (Bi2Te3) doped with 3% antimony selenide (Sb2Se3), prepared by zone melting method, Z value (merit coefficient) reaches 1.2×10⁻³ / K. Process treatment, the surface of the thermoelectric ring 31 is sprayed with an aluminum oxide insulating layer to prevent short circuit caused by conductive shaft of the gear 2. Gradient doping technology can also be used to gradually change the doping concentration along the radial direction to optimize the thermoelectric efficiency, or replaced by silicon germanium alloy or skutterudite material to adapt to different temperature range requirements.

[0030] Preferably, a cooling fan 4 is arranged on the outside of the shell 1 at the connection between the heat pipe 32 and the shell 1 to further accelerate the heat dissipation of the inside of the shell 1.

[0031] Optionally, an axial flow fan is installed at the heat dissipation end of the heat pipe 32 at the top of the shell 1, and the fan power is supplied by a coil inductive current through a voltage stabilizing module. The fan speed is dynamically adjusted according to the base temperature of the heat pipe 32, and the speed is increased by 500 rpm for every 10℃ increase in temperature. A centrifugal fan can also be embedded in the air duct inside the shell 1 to realize directional air circulation.

[0032] Optionally, a plurality of groups of heat-conducting plates are arranged inside the shell 1, and the electrically conductive coil 11 is arranged on the heat-conducting plates, and the heat-conducting plates can conduct the heat of the coil and the heat inside the shell 1 to the shell 1 for heat dissipation.

[0033] Preferably, the gear 2 is provided with an annular groove 22 along the circumference, and the permanent magnets 21 are uniformly embedded in the annular groove, so that the gear 2 runs stably.

[0034] Optionally, the gear 2 is turned to form an annular groove with a width of 5 mm and a depth of 3 mm at the root circle, the groove bottom is drilled and tapped, the permanent magnets 21 are fixed by means of the countersunk screws, the screw heads are coated with high-temperature-resistant glue to prevent loosening, the groove opening is covered with a stainless steel sheath to prevent lubricating oil from seeping in and causing the magnets to corrode. The groove can also be designed as a dovetail groove structure, and the permanent magnets 21 are locked by means of wedge-shaped blocks after being embedded. A plastic insert is formed on the surface of the gear 2 by means of injection molding, and the magnets are pressed into the insert clamping groove

[0035] Specifically, the working principle and use process of the utility model are as follows: the technical scheme of the utility model generates a magnetic field by installing the permanent magnets 21 on the gear 2, installs the electrically conductive coil 11 on the shell 1, captures the rotational kinetic energy of the gear 2 to convert into self-power supply, and drives the thermoelectric refrigeration device 3 (based on Peltier effect) to actively transfer the heat inside the speed reducer, so that the heat inside the speed reducer is quickly reduced, and the dual improvement of energy utilization and heat dissipation efficiency is realized.

[0036] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation or direct / indirect application in other related technical fields based on the utility model concept, the contents of the utility model specification and the drawings are included in the patent protection range of the utility model.

Claims

1. A horizontal speed reducer comprising a housing (1) and a plurality of gears (2) installed in the housing (1) and arranged in mutual engagement, characterized in that, The gear (2) is provided with a plurality of permanent magnets (21), the shell (1) is provided with a plurality of groups of conductive coils (11), one side of the shell (1) is provided with a thermoelectric refrigeration device (3), the refrigeration end of the thermoelectric refrigeration device (3) is arranged close to the gear (2), and the thermoelectric refrigeration device (3) is electrically connected with the conductive coil (11).

2. A horizontal speed reducer according to claim 1, characterized by The thermoelectric refrigeration device (3) comprises a thermoelectric ring (31) and a heat pipe (32), the thermoelectric ring (31) is sleeved on the rotating shaft of the gear (2) and is rotationally connected, and the heat pipe (32) is connected with the thermoelectric ring (31) and the shell (1) respectively.

3. A horizontal speed reducer according to claim 2, characterized in that The thermoelectric ring is provided with a temperature sensor (33) on the side close to the rotating shaft of the gear (2).

4. A horizontal speed reducer according to claim 3, characterized in that The thermoelectric ring is composed of bismuth telluride alloy.

5. A horizontal speed reducer according to claim 4, wherein The outer side of the shell (1) is provided with a heat dissipation fan (4) at the connection position of the heat pipe (32) and the shell (1).

6. A horizontal speed reducer according to claim 1, wherein The inner side of the shell (1) is provided with a plurality of groups of heat conducting plates, and the conductive coils (11) are arranged on the heat conducting plates.

7. A horizontal speed reducer according to claim 1, wherein The gear (2) is provided with an annular groove (22) along the circumference, and the permanent magnets (21) are uniformly embedded in the annular groove.

Images