CN218934849U

CN218934849U - Heat dissipation system for work machine and work machine

Info

Publication number: CN218934849U
Application number: CN202223477500.3U
Authority: CN
Inventors: 朱远; 张翠平; 陈飞; 李家武
Original assignee: Caterpillar SARL
Current assignee: Caterpillar SARL
Priority date: 2022-12-26
Filing date: 2022-12-26
Publication date: 2023-04-28
Anticipated expiration: 2032-12-26

Abstract

The present utility model provides a heat dissipation system (1) for a work machine, the heat dissipation system comprising: a fan assembly (2); a fan shroud (3) surrounding the fan assembly (2), the fan shroud having an air outlet (30) and having an outer side (31) facing away from the fan assembly; and an air anti-reflux device (4) fixed to an outer side surface of the fan shroud around the air outlet (30); the air backflow prevention device (4) comprises a rubber guard plate (41), a pressing plate (42) arranged on the outer side of the rubber guard plate, a fastener (43) used for fixing the rubber guard plate and the pressing plate to the fan guard, and a limiting mechanism (5) arranged above the air outlet (30) and used for the rubber guard plate. The utility model also relates to a working machine comprising the heat dissipation system.

Description

Heat dissipation system for work machine and work machine

Technical Field

The present disclosure relates to heat dissipation technology for work machines, and more particularly, to a heat dissipation system for a work machine and a work machine including the heat dissipation system.

Background

Work machines, such as excavators, generally have a strong work intensity, a harsh work environment, and a long work time. The heat dissipation system works for a long time in a high-temperature environment, is obviously important for engine heat dissipation, hydraulic oil heat dissipation and air conditioning refrigeration to ensure the normal operation of the machine, and the heat dissipation system of the current operation machine can generally meet the heat dissipation requirement. Currently, a heat dissipation system design that ensures the maximum flow rate of air in heat dissipation as much as possible is generally implemented by positioning a fan at a proper position and reducing air loss. Positioning the fan in a suitable location includes, for example, locating the fan center position appropriately based on oil cooling, water cooling, air cooling requirements, and protecting the maximum range of air flow with a fan shroud; reducing air flow losses includes adjusting fan blade position centered in the shroud to ensure uniform clearance and reducing air backflow losses using rubber guard plates to pressurize the plates.

However, in the case of using a rubber protector plate, there are the following problems: in order to ensure the adjustment clearance, the design is reserved, the adjustment allowance is larger, the rubber guard plate is softer and easy to deform, and the clearance is ensured to be uniform during installation, so that repeated adjustment is caused; the rubber guard plate ages after long-time work, and the top rubber guard plate sags, interferes with the fan blades, causes the fan blades to fail and collapse locally, and damages a side oil circuit and a circuit.

Disclosure of Invention

The utility model aims to provide a heat dissipation system for a working machine, which can limit the deformation freedom degree of a rubber guard plate by adopting an improved air backflow prevention device, avoid multiple adjustment, save labor and improve assembly manufacturability.

To this end, the present utility model provides a heat dissipation system for a work machine, comprising: a fan assembly; a fan shroud surrounding the fan assembly, the fan shroud having an air outlet and having an outer side facing away from the fan assembly; and an air anti-reflux device fixed to an outer side of the fan shroud around the air outlet; the air backflow prevention device comprises a rubber guard plate, a pressing plate, a fastening piece and a limiting mechanism, wherein the pressing plate is arranged on the outer side of the rubber guard plate, the fastening piece is used for fixing the rubber guard plate and the pressing plate to the fan guard plate, and the limiting mechanism is arranged above the air outlet and used for the rubber guard plate.

According to the utility model, the limiting mechanism for the rubber guard plate is arranged above the air outlet, so that the limiting mechanism limits the sagging amount of the rubber guard plate when the rubber guard plate sags due to aging deformation, thereby avoiding safety accidents caused by interference with the fan blades and improving the safety of the cooling fan.

According to one aspect of the utility model, the air outlet is configured as a circular air outlet, the rubber guard plate can have a first circular inner periphery for adapting to the air outlet, the pressure plate has a second circular inner periphery, the projections of the first circular inner periphery and the second circular inner periphery in a vertical plane have the same circle center, and the rubber guard plate and the pressure plate are arranged so that the distance from the first circular inner periphery to the circle center is smaller than the distance from the second circular inner periphery to the circle center.

According to a preferred embodiment of the present utility model, in order to reduce the air backflow loss, the first circular inner peripheral edge of the rubber guard plate extends beyond the inner edge of the circular air outlet toward the center thereof, and the distance from the first circular inner peripheral edge to the tip of the fan blade of the fan assembly is selected to be 10±3mm to ensure safety.

According to a preferred embodiment of the utility model, for ease of field installation, the rubber fender is designed as a split-type, comprising a first fender section, a second fender section and a third fender section each having a circular-arc-shaped inner periphery, wherein the respective circular-arc-shaped inner peripheries of the first, second and third fender sections together form the first circular-shaped inner periphery of the rubber fender; the platen accordingly comprises a first platen section, a second platen section and a third platen section each having a circular-arc inner periphery, wherein the respective circular-arc inner peripheries of the first platen section, the second platen section and the third platen section together form the second circular inner periphery of the platen, wherein the first guard section and the second platen section are arranged above the air outlet.

According to a preferred embodiment of the utility model, the limiting mechanism comprises at least two limiting pins fixedly connected to the first platen section and corresponding at least two limiting holes provided in the first apron section, wherein the size of the limiting holes is smaller than the size of the limiting pins so as to preserve the adjustment allowance of the rubber apron.

In a preferred embodiment of the utility model, the limiting means comprise two limiting pins and two corresponding limiting holes, the limiting pins being fixedly connected to the first platen section by welding, wherein the limiting holes are circular with a diameter of 15mm to 17mm, preferably 16mm-16.5mm, for example 16mm. It should be appreciated that the number of stop pins and stop holes is merely exemplary, and that other numbers of stop pins and stop holes may be provided depending on the size of the air outlet, particularly the size of the first shield segment. And the shape and the size of the limiting hole can be selected according to the adjustment allowance required by the rubber guard plate.

According to a preferred embodiment of the utility model, the first apron section is constructed and arranged to be symmetrical on its own about a first vertical line passing through the centre of the first circular inner periphery, and the first platen section is constructed and arranged to be symmetrical on its own about a second vertical line passing through the centre of the second circular inner periphery; the second and third shield sections are configured and arranged symmetrically about the first vertical line, and the second and third platen sections (423) are configured and arranged symmetrically about the second vertical line.

According to a preferred embodiment of the utility model, the two limiting pins are arranged symmetrically with respect to the second vertical line, and the two limiting holes are correspondingly arranged symmetrically with respect to the first vertical line.

In one aspect of the utility model, the fastener includes two first fastening screws disposed at both ends of the first apron section and the first platen section, two second fastening screws disposed at both ends of the second apron section and the second platen section, and a third fastening screw disposed at both ends of the third apron section and the third platen section.

The utility model also provides a working machine, which comprises the heat dissipation system with the air backflow prevention device.

By adopting the technical scheme, the utility model can produce at least one of the following beneficial technical effects

The utility model mainly improves the safety and the assemblability on the basis of the design of preventing the countercurrent loss of air: the combination of the rubber guard plate and the pressing plate can effectively reduce the air countercurrent loss; the limiting mechanisms are arranged on the pressing plate and the rubber guard plate, when the rubber guard plate is aged, deformed and sagged, the sagging amount of the rubber guard plate is limited by the limiting pins, so that safety accidents caused by interference with the fan blades are avoided, and large-area damage of a machine caused by a small failure is avoided; the deformation freedom degree of the rubber guard plate can be limited by the limiting pin, so that multiple adjustments are avoided, and labor is saved.

Drawings

Further features and advantages of the utility model will become more apparent from reading the following detailed description with reference to the accompanying drawings in which:

FIG. 1 shows a schematic diagram of one embodiment of a heat dissipation system in accordance with the present utility model;

FIG. 2 shows a schematic view of one embodiment of an air anti-reflux device according to the present utility model; and

fig. 3 shows a partial enlarged view of the air anti-reflux device taken along a line passing through the stop pin.

Detailed Description

A heat dissipation system for a work machine according to the present utility model will be described below by way of example with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model to those skilled in the art. It will be apparent, however, to one skilled in the art that the present utility model may be practiced without some of these specific details. Furthermore, it should be understood that the utility model is not limited to specific described embodiments. Rather, the utility model can be considered to be implemented with any combination of the following features and elements, whether or not they relate to different embodiments.

In this document, the terms "upper", "lower" refer to the upper and lower directions in the drawings, and the "upper and lower" directions in the drawings constitute the vertical direction, and the direction perpendicular to the vertical direction indicates the "horizontal" direction.

Fig. 1 shows an embodiment of a heat dissipation system 1 for a work machine according to the utility model. As can be seen from the figure, the heat dissipation system 1 comprises a fan assembly 2, a fan shroud 3 surrounding the fan assembly, which fan shroud is arranged on the air outlet side of the fan assembly, and an air anti-reflux device 4, and the fan shroud 3 has a circular air outlet 30 with its inner side facing the fan assembly and its outer side 31 facing away from the fan assembly 2. The air anti-reflux device 4 is fixed to the outer side 31 of the fan shroud 3 around the air outlet 30, in particular, the air anti-reflux device 4 includes a rubber guard 41 arranged around the air outlet, a pressure plate 42 located outside the rubber guard, a fastener 43 fastening the rubber guard and the pressure plate to the fan shroud, and a spacing mechanism 5 located above the air outlet 30. The limiting mechanism 5 is arranged above the air outlet 30, especially right above the air outlet, so that when the rubber guard 41 is prevented from ageing and deforming, the sagging amount of the rubber guard is limited, and safety accidents caused by the interference of the limiting mechanism with the fan blade of the fan assembly 2 are avoided.

Referring to fig. 2, one embodiment of an air anti-reflux device 4 according to the present utility model is shown. As can be seen from the figures, for ease of installation adjustment, the rubber shield 41 and the pressure plate 42 are preferably of separate type, in which embodiment the outer circumferential shape of the rubber shield 41 and the pressure plate 42 can be chosen to be adapted to the outer circumferential shape of the fan shroud 3, the rubber shield 41 comprising three sections, namely a first shield section 411, a second shield section 412 and a third shield section 413, each of which, in the assembled state, together form a first circular inner periphery 410 of the rubber shield 41. Accordingly, the platen 42 comprises a first platen section 421, a second platen section 422 and a third platen section 423 each having a circular arc shaped inner periphery, wherein the circular arc shaped inner peripheries of the first platen section 421, the second platen section 422 and the third platen section 423 together constitute the second circular inner periphery 420 of the platen 42, and the first guard section 411 and the second platen section 422 are arranged directly above the air outlet 30. As can be seen in particular from fig. 2, the projection of the first circular inner periphery 410 of the rubber shield 41 and the second circular inner periphery 420 of the pressure plate 42 in a vertical plane, i.e. in the plane of the paper, has the same center. Referring again to fig. 1, in the assembled state, the rubber sheeting 41 and the pressure plate 42 are arranged such that the distance from the first circular inner peripheral edge 410 to its center is less than the distance from the second circular inner peripheral edge 420 to its center. That is, the inner periphery of the rubber guard 41 is closer to the blade tips of the fan assembly 2 than the inner periphery of the pressure plate 42.

In the present utility model, the combination of the rubber shield and the pressure plate is adopted, so that the air backflow loss of the fan assembly of the heat dissipation system 1 can be effectively reduced. During assembly, the distance from the blade tip to the inner periphery 410 of the rubber guard 41 is required to be as small as possible, but at the same time safety is required to be considered, so that the distance from the first circular inner periphery 410 of the rubber guard to the blade tip of the fan assembly 2 is 10±3mm.

Referring to fig. 2 and 3, the spacing mechanism 5 comprises two spaced apart spacing pins 51 fixedly connected, e.g. welded, to the first platen section 421 of the platen 41 and corresponding two spaced apart spacing holes 52 provided in the first apron section 411, the spacing holes 52 may be, e.g., circular holes having a diameter significantly larger than the diameter of the spacing pins 51. In a particular embodiment, as shown in fig. 3, to ensure that the adjustment margin is maintained during installation of the rubber grommet, the size of the retaining hole is significantly larger than the size of the retaining pin, and the diameter of the retaining hole 52 may be selected to be 15mm to 17mm, preferably 16mm to 16.5mm, for example 16mm. It will be appreciated that the number of limiting holes and limiting pins given above are exemplary, and that other suitable numbers of limiting holes and limiting pins may be selected as desired, for example, depending on the size of the air outlet 30 of the fan shroud 3, and in particular the size of the first shroud segment 411 and the first platen segment 421. In this embodiment, the pressing plate is, for example, a steel plate.

Although in the illustrated embodiment, each rubber guard 41 and each platen 42 includes three sections. However, it should be understood that other numbers of segments are selected and are also contemplated within the scope of the present application. In the embodiment shown in fig. 1 and 2, the first panel section 411 of the rubber panel 41 and the first platen section 421 of the platen 42 are preferably arranged directly above the air outlet 30. Preferably, the first apron section 411 is constructed and arranged to be symmetrical in itself about a first vertical line (not shown) passing through the center of the first circular inner periphery 410 of the rubber apron 41, while the second apron section 412 and the third apron section 413 are also constructed and arranged to be symmetrical about the first vertical line. Similarly, the first platen section 421 is constructed and arranged to be symmetrical by itself about a second vertical line (not shown) passing through the center of the second circular inner periphery 420, and the second platen section 422 and the third platen section 423 are constructed and arranged to be symmetrical about the second vertical line. In fact, in the orthographic view of the air anti-reflux device 4, the projections of the first vertical line and the second vertical line coincide.

In addition, as can be seen from fig. 2, the fasteners 43 may include first fastening screws 431 disposed at both ends of the first apron section 411 and the first platen section 421, second fastening screws 432 disposed at both ends of the second apron section 412 and the second platen section 422, and third fastening screws 433 disposed at both ends of the third apron section 413 and the third platen section 423. Referring again to fig. 1, two first fastening screws 431 cooperate with threaded holes arranged at both ends of the first shroud segment and the first pressure plate segment, the shims 430, and threaded holes arranged at corresponding positions of the fan shroud 3, fixing the first shroud segment and the first pressure plate segment around the air outlet 30 to a position of the fan shroud 3 directly above the air outlet 30. Two second fastening screws 432 cooperate with threaded holes arranged at both ends of the second shroud segment and the second pressure plate segment, the shims 430, and threaded holes arranged at corresponding positions of the fan shroud 3, fixing the second shroud segment and the second pressure plate segment around the air outlet 30 to a position of the fan shroud 3 located to the left of the air outlet 30. Two third fastening screws 433 cooperate with screw holes arranged at both ends of the third shroud segment and the third pressure plate segment, the shims 430, and screw holes arranged at corresponding positions of the fan shroud 3, to fix the third shroud segment and the third pressure plate segment around the air outlet 30 to a position of the fan shroud 3 on the right side of the air outlet 30.

Advantageously, in order to better limit the sagging amount of the rubber sheeting after aging, the two limiting pins 51 are also arranged symmetrically with respect to the second vertical line, and correspondingly the two limiting holes 52 are arranged symmetrically with respect to the second vertical line. When the rubber guard plate is aged and deformed, the two spacing pins 51 which are spaced apart and symmetrically arranged are used for limiting the sagging amount of the rubber guard plate, avoiding interference with the blade tips of the fan assembly 2, causing safety accidents, avoiding large-area damage of the machine caused by small failure of the rubber guard plate, and improving the safety of the cooling fan assembly. And, by providing the stopper pin welded to the first platen section 421 of the platen 42, not only the degree of freedom of deformation of the rubber protector plate can be restricted, but also multiple adjustments can be avoided, labor is saved, and assembly manufacturability is improved.

In an embodiment of the utility model, not shown, a work machine is provided comprising a heat dissipation system 1 with an air anti-reflux device 4 as described above. The working machine adopting the air backflow prevention device 4 can prevent the sagging of the rubber guard plate at the top from interfering with the blades of the fan assembly under the condition that the rubber guard plate is aged, thereby preventing the blades from failing and damaging an oil circuit and a circuit due to local collapse caused by interference with the blades.

Industrial applicability

The utility model can be applied to various working machines with heat radiation systems, the fan shield with the air outlet is arranged on the air outlet side of the fan component of the heat radiation system, the air backflow prevention device comprising the rubber guard plate and the pressing plate is arranged around the air outlet and used for guaranteeing the maximum air flow during heat radiation, and meanwhile, the limiting mechanism such as the limiting pin which is arranged above the air outlet and used for the rubber guard plate can avoid the phenomenon that the rubber guard plate at the top sags to interfere with the fan blade of the fan component, thereby causing safety accidents and improving the safety of the heat radiation fan.

A variety of work machines such as road rollers, excavators, loaders, graders, bulldozers, off-highway trucks, etc., may benefit from the disclosure herein.

It should be noted that the above description is only exemplary and that a person skilled in the art may make various modifications and variants to the embodiments of the utility model in light of the above description, which modifications and variants are all within the scope of protection of the utility model.

Claims

1. A heat dissipation system (1) for a work machine, the heat dissipation system comprising:

a fan assembly (2);

a fan shroud (3) surrounding the fan assembly (2), the fan shroud having an air outlet (30) and having an outer side (31) facing away from the fan assembly; and

an air anti-reflux device (4) fixed to an outer side (31) of the fan shroud around the air outlet (30);

the air backflow prevention device (4) comprises a rubber guard plate (41), a pressing plate (42) arranged on the outer side of the rubber guard plate, a fastener (43) used for fixing the rubber guard plate and the pressing plate to the fan guard, and a limiting mechanism (5) arranged above the air outlet (30) and used for the rubber guard plate.

2. The heat dissipating system (1) according to claim 1, wherein the air outlet (30) is a circular air outlet, the rubber guard (41) has a first circular inner periphery (410), the pressure plate (42) has a second circular inner periphery (420), in assembled state, the projections of the first circular inner periphery and the second circular inner periphery in a vertical plane have the same center, the rubber guard (41) and the pressure plate (42) are arranged such that the distance of the first circular inner periphery (410) to its center is smaller than the distance of the second circular inner periphery (420) to its center.

3. The heat dissipation system (1) according to claim 2, characterized in that the first circular inner periphery (410) of the rubber shield (41) extends beyond the inner edge of the air outlet (30) towards its centre and the distance of the first circular inner periphery (410) to the blade tip (20) of the fan assembly (2) is 10±3mm.

4. A heat dissipation system (1) according to claim 2 or 3, characterized in that the rubber shield (41) comprises a first shield section (411), a second shield section (412) and a third shield section (413) each having a circular arc-shaped inner periphery, wherein the circular arc-shaped inner peripheries of the first shield section (411), the second shield section (412) and the third shield section (413) together constitute the first circular inner periphery (410) of the rubber shield (41); the pressure plate (42) comprises a first pressure plate section (421), a second pressure plate section (422) and a third pressure plate section (423) each having an arc-shaped inner periphery, wherein the respective arc-shaped inner peripheries of the first pressure plate section (421), the second pressure plate section (422) and the third pressure plate section (423) together form the second circular inner periphery (420) of the pressure plate (42), wherein the first plate section (411) and the second pressure plate section (422) are arranged above the air outlet (30).

5. The heat dissipating system (1) according to claim 4, wherein the limiting mechanism (5) comprises at least two spaced apart limiting pins (51) fixedly connected to the first platen section (421) and corresponding at least two limiting holes (52) provided in the first apron section (411), wherein the limiting holes (52) have a smaller size than the limiting pins (51).

6. The heat dissipating system (1) according to claim 5, wherein the limiting mechanism (5) comprises two limiting pins (51) and two corresponding limiting holes (52), the limiting pins being fixedly connected to the first platen section (421) by welding, wherein the limiting holes are circular with a diameter of 15mm to 17mm.

7. The heat dissipation system (1) of claim 6, wherein the first shield section (411) is constructed and arranged to be symmetrical with respect to itself about a first vertical line passing through the center of the first circular inner periphery (410), and the first platen section (421) is constructed and arranged to be symmetrical with respect to itself about a second vertical line passing through the center of the second circular inner periphery (420); the second and third shield sections (412, 413) are configured and arranged symmetrically about the first vertical line, and the second and third platen sections (422, 423) are configured and arranged symmetrically about the second vertical line.

8. The heat dissipation system (1) according to claim 7, characterized in that the two limiting pins (51) are arranged symmetrically with respect to the second vertical line, and in that the two limiting holes (52) are correspondingly arranged symmetrically with respect to the first vertical line.

9. The heat dissipating system (1) of claim 4, wherein the fastener (43) comprises two first fastening screws (431) arranged at both ends of the first backplate section (411) and the first platen section (421), two second fastening screws (432) arranged at both ends of the second backplate section (412) and the second platen section (422), and a third fastening screw (433) arranged at both ends of the third backplate section (413) and the third platen section (423).

10. Work machine, characterized by comprising a heat dissipation system (1) according to any one of claims 1 to 9.