Hoisting mechanism motor braking energy recycling system

Abstract

The invention relates to a hoisting mechanism motor braking energy recycling system in the technical field of motor energy recycling. The hoisting mechanism motor braking energy recycling system comprises a winding drum, a hoisting motor for controlling the winding drum to rotate, a brake for controlling the winding drum to brake and a braking resistor connected to a discharging loop circuit of the hoisting motor. An oiling device used for adding lubricating oil to a brake pad of the brake is arranged above the brake, and the brake resistor transmits temperature to the oiling device. According to the motor braking energy recycling system, braking energy can be directly recycled at low cost and high efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of motor energy recovery, and in particular to a lifting mechanism motor braking energy recovery and utilization system. Background Art

[0002] It is well known that in the process of lifting heavy objects, the hoisting mechanism of a crane can recover two kinds of energy. One is the friction energy of the brake during braking. When the brake is used frequently, this energy will cause damage to the friction parts and reduce the braking performance. Since this energy recovery is difficult, it is necessary to conduct regular inspections and maintenance, and replenish lubricating oil in time to reduce friction, wear, corrosion and overheating, especially in the cold winter weather in the north, it is even more necessary to ensure that the braking process is smooth and safe. The other is the power generation energy of the hoisting motor when lowering the heavy object. This power generation energy cannot be consumed by itself. If it is ignored, it will affect the life of the motor. Therefore, it is generally solved by means of dissipation, storage and utilization; dissipation is to connect a load in series to the power generation circuit of the motor, usually a braking resistor, to consume energy through the heat generated by the braking resistor. The disadvantage is that the natural heat dissipation is slow, not easy to last too long, and wastes energy; storage is to connect a battery to collect electrical energy, as shown in the Chinese utility model patent with announcement number CN203294993U, the stored electrical energy can continue to be fed back to the motor for lifting heavy objects, thereby achieving the purpose of energy saving through reuse. The disadvantage is that an additional storage feedback device is required, which increases the cost, and after the storage conversion, the energy utilization rate will also be reduced. Summary of the invention

[0003] In order to overcome the deficiencies in the background technology and solve the existing technical problems, the present invention discloses a lifting mechanism motor braking energy recovery system, which can directly reuse the braking energy at low cost and high efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solution: A lifting mechanism motor brake energy recovery and utilization system comprises a drum, a lifting motor for controlling the rotation of the drum, a brake for controlling the braking of the drum, and a braking resistor connected to the discharge loop circuit of the lifting motor; an oiling device for adding lubricating oil to the brake pads of the brake is provided above the brake, and the braking resistor transfers temperature to the oiling device.

[0005] Furthermore, the refueling device comprises an oil storage bottle and an oil outlet nozzle connected to the bottom of the oil storage bottle, and the brake resistor is configured as a long line and is wound around the oil storage bottle and the oil outlet nozzle.

[0006] Furthermore, an oil outlet channel is provided in the center of the oil outlet nozzle, the upper end of which is connected to the oil storage bottle. A sponge is blocked in the oil outlet channel, and the sponge contacts the shape memory alloy that expands under heat.

[0007] Furthermore, the oil outlet nozzle includes a heat-conducting tube with a tube cavity, the upper end of the heat-conducting tube is closed to form an upper hole section connected to the oil storage bottle, and the lower end cover of the heat-conducting tube is fixed with a bottom cover; a convex column corresponding to the insertion into the tube cavity is provided in the center of the inner cover surface of the bottom cover, and the sponge body is naturally blocked between the lower port of the upper hole section and the upper end surface of the convex column, a groove is provided in the center of the upper end surface of the convex column, a pressure block is adapted to slide in the groove, the shape memory alloy is set to be spring-shaped and the two ends respectively abut against the bottom of the groove and the pressure block; a gap is left between the outer wall of the convex column and the wall of the tube cavity, and a lower hole section connecting the gap with the outer cover surface of the bottom cover is provided in the bottom cover.

[0008] Furthermore, a support column is fixed at the center of the bottom surface of the pressing block, and when the lower end of the support column contacts the bottom of the groove, the top surface of the pressing block is flush with the upper end surface of the convex column, and the shape memory alloy is sleeved outside the support column.

[0009] Furthermore, the gap is an annular gap, and a plurality of lower hole sections are evenly arranged along the annular gap, and the lower ends of the plurality of lower hole sections are merged and connected.

[0010] Furthermore, the brake resistor comprises a low resistance section and a high resistance section which are connected in series and are respectively wound around the outer wall of the oil storage bottle and embedded in the oil outlet nozzle.

[0011] Furthermore, the shape memory alloy is set to be nickel-titanium alloy.

[0012] Furthermore, a heat-insulating layer is provided outside the oil outlet nozzle.

[0013] Furthermore, the refueling device is connected in parallel with a battery, and the refueling device and the battery are respectively connected in series with a relay and a normally open contact switch of the relay.

[0014] Due to the adoption of the above-mentioned technical solution, the present invention has the following beneficial effects: The lifting mechanism motor brake energy recovery and utilization system disclosed in the present invention directly heats the refueling device arranged above the brake through the braking resistor, that is, it can use the heat transfer of the lubricating oil to increase the heat dissipation of the braking resistor, so that the braking resistor can work at a higher load more continuously, and the lubricating oil can maintain good fluidity and lubrication effect when the lifting mechanism is used in the north, especially in winter, thereby directly saving energy while reducing costs.

[0015] In addition, when the refueling device is designed to discharge oil through the heat-extrusion sponge of the shape memory alloy, not only can the refueling be automated, but the frequency of lifting and braking use of the lifting mechanism can also be linked to the frequency of lubricating oil addition and maintenance, thereby realizing intelligent refueling. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the implementation structure of the present invention; Figure 2 is a structural schematic diagram of the refueling device; Figure 3 It is a schematic cross-sectional view of the enlarged structure of the oil outlet nozzle.

[0017] In the figure: 1. reel; 2. lifting motor; 3. brake; 4. oil storage bottle; 5. brake resistor; 6. oil outlet nozzle; 601. heat-conducting tube; 602. tube cavity; 603. boss; 604. lower hole section; 605. bottom cover; 606. groove; 607. shape memory alloy; 608. support column; 609. pressure block; 610. sponge; 611. upper hole section; 7. relay; 8. normally open contact switch; 9. battery. DETAILED DESCRIPTION

[0018] The technical solution of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention. In the description, it should be understood that if there are terms such as "upper", "lower", "front", "back", "left", "right" and the like indicating directions or positional relationships, they are only corresponding to the drawings of the present invention, for the convenience of describing the present invention, and do not indicate or imply that the devices or components referred to must have a specific direction: Embodiment 1:

[0019] Combined with Figure 1-2 The lifting mechanism motor brake energy recovery and utilization system shown in the figure comprises a drum 1, a lifting motor 2 for controlling the rotation of the drum 1, a brake 3 for controlling the braking of the drum 1, and a brake resistor 5 connected to the discharge circuit of the lifting motor 2; a refueling device for adding lubricating oil to the brake pad of the brake 3 is provided above the brake 3, and the refueling device can use an existing automatic or manual oiling device, and the brake resistor 5 transfers temperature to the refueling device, generally by contact conduction; as needed, the refueling device comprises an oil storage bottle 4 and an oil outlet nozzle 6 connected to the bottom of the oil storage bottle 4, which is a general structure of the refueling device, and the brake resistor 5 is set in a long line shape and wound around the oil storage bottle 4 and the oil outlet nozzle 6, and after changing the shape of the brake resistor 5, the heat transfer effect can be better; As needed, an oil outlet channel is provided in the center of the oil outlet nozzle 6, whose upper end is connected to the oil storage bottle 4. A sponge 610 is blocked in the oil outlet channel. The sponge 610 contacts the shape memory alloy 607 which expands due to heat. Specifically, the shape memory alloy 607 can be set as a nickel-titanium alloy. When the temperature of the lubricating oil is low, its fluidity is poor. Even if it can penetrate into the sponge 610 through the oil outlet channel, the structure of the sponge 610 will increase the adhesion of the lubricating oil and achieve a blocking effect. Generally, no or very few oil droplets will be discharged. Once the lifting mechanism is used frequently, the braking of the brake 3 When the friction between the brake pads is severe and the brake resistor 5 continues to heat up, the shape memory alloy 607 can be expanded by the heat and squeeze the sponge 610, thereby increasing the discharge of lubricating oil and reducing the wear of the brake pads, thereby achieving a linkage effect; in addition, the brake resistor 5 includes a low-resistance segment and a high-resistance segment connected in series, which are respectively wound around the outer wall of the oil storage bottle 4 and embedded in the oil outlet nozzle 6. The oil outlet nozzle 6 is provided with an insulation layer on the outside. While maintaining the operating temperature of the lubricating oil in the oil storage bottle 4, more heat can be concentrated on the narrow and easily blocked oil outlet channel of the oil outlet nozzle 6 and the shape memory alloy 607.

[0020] The lifting mechanism motor brake energy recovery and utilization system of the present invention is implemented. When the lifting mechanism is lifting and braking, the feedback energy of the lifting motor 2 is transmitted to the brake resistor 5, causing the brake resistor 5 to heat up, and the heat is then transmitted to the refueling device, thereby improving the fluidity and lubrication effect of the lubricating oil in the refueling device in low temperature weather, ensuring the good operation of the brake 3 when it is frequently used. Embodiment 2:

[0021] Although adding lubricating oil to the brake can be maintained, it cannot be added continuously during frequent use. Continuous addition will reduce the braking effect and easily cause waste. Figure 3As shown, the difference from the first embodiment is that the oil outlet nozzle 6 includes a heat-conducting cylinder 601 with a cylinder cavity 602, the upper end of the heat-conducting cylinder 601 is closed to form an upper hole section 611 connected to the oil storage bottle 4, and the lower end cover of the heat-conducting cylinder 601 is fixed with a bottom cover 605; the center of the inner cover surface of the bottom cover 605 is provided with a convex column 603 corresponding to the insertion of the cylinder cavity 602, and the sponge 610 is naturally blocked between the lower port of the upper hole section 611 and the upper end surface of the convex column 603, and the center of the upper end surface of the convex column 603 is provided with a groove 606, and the groove 606 is adapted to slide A pressure block 609 is provided, and the shape memory alloy 607 is set in a spring shape and its two ends are respectively against the bottom of the groove 606 and the pressure block 609; as needed, a support column 608 is fixed at the center of the bottom surface of the pressure block 609 to prevent the pressure block 609 from excessively moving downward, and when the lower end of the support column 608 is against the bottom of the groove 606, the top surface of the pressure block 609 is flush with the upper end surface of the protrusion 603, ensuring that the sponge 610 can be placed flat, and the shape memory alloy 607 is sleeved outside the support column 608, and the support column 608 is used to expand and guide the shape memory alloy 607 ; A gap is left between the outer wall of the convex column 603 and the wall of the cylindrical cavity 602, and a lower hole section 604 is provided in the bottom cover 605 to connect the gap with the outer cover surface of the bottom cover 605, so as to ensure that the lubricating oil can flow out from the gap and the lower hole section 604; as required, the gap is an annular gap, and a plurality of lower hole sections 604 are evenly arranged along the annular gap, and the lower ends of the plurality of lower hole sections 604 are connected and merged to ensure that the lubricating oil can be discharged evenly; when the shape memory alloy 607 is expanded by the heat transfer of the brake resistor 5, it will push the pressing block 609 to squeeze the sponge 610 upward, The lubricating liquid flowing out of the sponge 610 flows out through the gap and the lower hole section 604 under the action of gravity. However, when the lifting mechanism is frequently lifted and lowered and braked, the shape memory alloy 607 is continuously heated and expanded, which can continuously compress the sponge 610. At this time, the sponge 610 has a tight structure and completely blocks the upper hole section 611 to prevent the continuous outflow of lubricating oil. When the lifting mechanism is reduced or stopped, the temperature of the braking resistor 5 decreases, and the shape memory alloy 607 shrinks, causing the pressure block 609 to move down and reset. At this time, the sponge 610 also returns to normal. Embodiment three:

[0022] Combined with Figure 1 As shown, the difference from the first embodiment is that the refueling device is connected in parallel with a battery 9, and the refueling device and the battery 9 are respectively connected in series with a relay 7 and a normally open contact switch 8 of the relay 7. If the braking resistor 5 is accidentally damaged and short-circuited, the normally open contact switch 8 is closed, and the battery 9 can be temporarily used to collect the energy fed back by the lifting motor 2.

[0023] The parts of the present invention that are not described in detail are prior art. It is obvious to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, no matter from which point of view, the above-mentioned embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the content of the claims involved.

Claims

1. A lifting mechanism motor braking energy recovery system, comprising a drum (1), a lifting motor (2) for controlling the rotation of the drum (1), a brake (3) for controlling the braking of the drum (1), and a braking resistor (5) connected to a discharge circuit of the lifting motor (2), wherein: A refueling device for adding lubricating oil to the brake pad of the brake (3) is provided above the brake (3), and the brake resistor (5) transfers temperature to the refueling device.

2. The lifting mechanism motor braking energy recovery and utilization system according to claim 1 is characterized in that: The refueling device comprises an oil storage bottle (4) and an oil outlet nozzle (6) connected to the bottom of the oil storage bottle (4); the brake resistor (5) is configured as a long line and is wound around the oil storage bottle (4) and the oil outlet nozzle (6).

3. The lifting mechanism motor braking energy recovery system according to claim 2 is characterized in that: An oil outlet channel whose upper end is connected to the oil storage bottle (4) is provided in the center of the oil outlet nozzle (6); a sponge (610) is blocked in the oil outlet channel, and the sponge (610) contacts a shape memory alloy (607) that expands under heat.

4. The lifting mechanism motor braking energy recovery and utilization system according to claim 3 is characterized in that: The oil outlet nozzle (6) comprises a heat-conducting tube (601) having a tube cavity (602); the upper end of the heat-conducting tube (601) is closed to form an upper hole section (611) connected to the oil storage bottle (4); the lower end cover of the heat-conducting tube (601) is fixed with a bottom cover (605); a convex column (603) corresponding to the insertion into the tube cavity (602) is provided at the center of the inner cover surface of the bottom cover (605); the sponge (610) is naturally blocked at the lower end of the upper hole section (611) and the upper end of the convex column (603). A groove (606) is provided at the center of the upper end surface of the boss (603), a pressure block (609) is slidably provided in the groove (606), the shape memory alloy (607) is configured as a spring, and the two ends thereof are respectively in contact with the bottom of the groove (606) and the pressure block (609); a gap is left between the outer wall of the boss (603) and the wall of the barrel cavity (602), and a lower hole section (604) is provided in the bottom cover (605) for connecting the gap with the outer cover surface of the bottom cover (605).

5. The lifting mechanism motor braking energy recovery and utilization system according to claim 4 is characterized in that: A support column (608) is fixed at the center of the bottom surface of the pressing block (609), and when the lower end of the support column (608) contacts the bottom of the groove (606), the top surface of the pressing block (609) is flush with the upper end surface of the protruding column (603), and the shape memory alloy (607) is sleeved outside the support column (608).

6. The lifting mechanism motor braking energy recovery and utilization system according to claim 4 is characterized in that: The gap is an annular gap, and a plurality of lower hole sections (604) are evenly arranged along the annular gap, and the lower ends of the plurality of lower hole sections (604) are joined and connected.

7. The lifting mechanism motor braking energy recovery and utilization system according to claim 3 is characterized in that: The braking resistor (5) comprises a low resistance section and a high resistance section which are connected in series and are respectively wound around the outer wall of the oil storage bottle (4) and embedded in the oil outlet nozzle (6).

8. The lifting mechanism motor braking energy recovery and utilization system according to claim 3 is characterized in that: The shape memory alloy (607) is configured as a nickel-titanium alloy.

9. The lifting mechanism motor braking energy recovery system according to claim 3 is characterized in that: The oil outlet nozzle (6) is provided with a heat-insulating layer outside.

10. The lifting mechanism motor braking energy recovery and utilization system according to claim 1 is characterized in that: The refueling device is connected in parallel with a storage battery (9), and the refueling device and the storage battery (9) are respectively connected in series with a relay (7) and a normally open contact switch (8) of the relay (7).

Images