Built-in integrated cooling filtering and defoaming device for hydraulic system of coal mining machine

Abstract

The application discloses a built-in integrated cooling filtering and defoaming device of a coal mining machine hydraulic system, which comprises a spiral fin tube cooler, an integrated shell, a centralized cooling part, a laminar flow filtering part, a damping buffer belt, a hydraulic system total oil return port and a spot block. The integrated shell comprises a flange, an outer shell, a defoaming layer, a laminar flow filtering layer forming the laminar flow filtering part, an end seat, a damping buffer groove, a spot block interface and a cooler interface. The spiral fin tube cooler is installed in the integrated shell through the cooler interface, the hydraulic system total oil return port is communicated with a coal mining machine hydraulic system oil collecting valve block and connected to the spot block interface by the spot block. The device integrates multiple functions of cooling, oil return pressure buffering, defoaming, precipitation and filtering, so that the oil return of the hydraulic system can be centrally cooled in the centralized cooling part at the first time, the oil quality returned to the hydraulic oil tank is ensured, and the good operation of the hydraulic system is ensured.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coal mining machinery, and particularly relates to an integrated cooling, filtering and defoaming device for a hydraulic system of a coal mining machine. BACKGROUND

[0002] The overall structure of the coal mining machine is compact, and in particular, the machine body of a thin seam coal mining machine is short and thin, and the effective space available for the external hydraulic pump station of the coal mining machine is relatively small. Due to the limited space, the external hydraulic pump station of the coal mining machine cannot be provided with an external cooling system, and therefore, most coal mining machines adopt an internal cooling system.

[0003] As shown in Figure 1 and Fig. 2, the hydraulic system of the coal mining machine generally comprises a hydraulic oil tank 1, a liquid level gauge 2, an oil suction filter 3, an air filter 4, a filter 5, a multi-way valve oil return pipeline 6, a cooler 7, a brake oil return pipeline 8, a motorized oil filling motor pump oil return pipeline 9, etc. The cooler 7 internally provided in the hydraulic oil tank 1 comprises a cooling head 71, a support frame 72, a cooling pipe 73, a cooling water inlet 74 and a cooling water outlet 75. The cooling pipe 73 is a light pipe made of a copper pipe or a stainless steel pipe and is inserted into the hydraulic oil tank 1 to pass cooling water through the cooling water inlet 74 and the cooling water outlet 75 to cool the oil in the hydraulic oil tank 1.

[0004] Although the hydraulic system of the coal mining machine in the prior art is internally provided with a cooler and a filter, each component is separately provided, has a single function, is sequentially installed in series, has a low degree of integration, has a bulky and complicated arrangement space, occupies a large space, and has a high failure rate. The high-temperature oil return flow of each oil circuit execution component of the hydraulic system is separately dispersed from different positions of the oil tank into the oil tank, and therefore, the oil tank connection pipeline is complicated, has a long span, is inconvenient to maintain, and has obvious safety hazards. The cooling pipe is a light pipe such as a copper pipe or a stainless steel pipe, and has a limited heat dissipation efficiency. In addition, the high-temperature oil return flow of each oil circuit execution component of the hydraulic system is separately dispersed from different positions of the oil tank into the oil tank, and the cooler is always directed to cooling the oil in the entire oil tank, so that the high-temperature oil return flow of each execution component cannot be quickly cooled in a timely, concentrated and efficient manner, and the oil cooling efficiency of the entire hydraulic system is low.

[0005] In addition, the hydraulic system of the coal mining machine in the prior art also lacks a defoaming device. During the oil return process of the hydraulic system, due to the impact of the oil or the tightness of part of the pipeline, the oil return oil will generate foam and bubbles, which will be mixed into the oil, causing unstable operation and air suction of the gear pump, and affecting the normal operation of the hydraulic system. SUMMARY

[0006] To solve the above problems in the prior art, the application provides an integrated cooling, filtering and defoaming device for a hydraulic system of a coal mining machine, which comprises a spiral fin tube cooler, an integrated shell, a centralized cooling part, a laminar flow filtering part, a damping buffer belt, a hydraulic system total oil return port and a banjo block, wherein:

[0007] The integrated shell comprises a flange, a shell, a defoaming layer, a laminar flow filtering layer forming the laminar flow filtering part, an end seat, a damping buffer groove, a banjo block interface and a cooler interface, wherein the banjo block interface and the cooler interface are arranged on the flange.

[0008] The spiral fin tube cooler is installed in the integrated shell through the cooler interface, the hydraulic system total oil return port is communicated with a oil collecting valve block of the hydraulic system of the coal mining machine and connected to the banjo block interface through the banjo block, and the oil collecting valve block collects all oil return pipelines of oil road executing components of the hydraulic system into one pipeline.

[0009] The end seat is installed at the end of the integrated shell away from the flange, the damping buffer groove is arranged on the end seat, and the damping buffer belt is installed in the damping buffer groove.

[0010] Further, in the integrated cooling, filtering and defoaming device for the hydraulic system of the coal mining machine, the shell comprises a large diameter part on one side of the flange and a small diameter part away from the flange, the defoaming layer comprises a first defoaming layer and a second defoaming layer, the laminar flow filtering layer comprises a first laminar flow filtering layer and a second laminar flow filtering layer, the first defoaming layer is arranged on the inner periphery of the large diameter part, the second defoaming layer is arranged on the inner periphery of the small diameter part, the first laminar flow filtering layer is arranged in the inner circular cavity of the large diameter part, and the second laminar flow filtering layer is arranged in the inner circular cavity of the small diameter part.

[0011] Further, in the integrated cooling, filtering and defoaming device for the hydraulic system of the coal mining machine, the space of the large diameter part except the space occupied by the spiral fin tube cooler and the first laminar flow filtering layer forms the centralized cooling part of the integrated cooling, filtering and defoaming device.

[0012] Further, in the integrated cooling, filtering and defoaming device for the hydraulic system of the coal mining machine, the end seat is installed at the end of the small diameter part.

[0013] Further, in the integrated cooling, filtering and defoaming device for the hydraulic system of the coal mining machine, the spiral fin tube cooler comprises a cooling head, a support frame, a spiral fin tube and a cooling water inlet and a cooling water outlet arranged on the cooling head.

[0014] Further, in the built-in integrated cooling filtering and defoaming device of the coal mining machine hydraulic system, the spiral fin tube cooler is installed in an invasive manner, and the spiral fin tube invades the oil tank of the hydraulic system.

[0015] The device of the present application is designed in a built-in integrated manner, and has multiple functions of cooling, oil return pressure buffering, defoaming, sedimentation and filtering. The device does not need to separately configure individual functional components, has short connecting pipeline span, high integration, compact structure, maximized space saving, low cost, convenient maintenance, powerful function, high system stability, and improved adaptability in high temperature, humid, vibrating and dusty environments. The integrated shell can protect the spiral fin tube cooler from collision and damage by external objects, and can enable the hydraulic system oil return to be timely, concentrated and efficiently cooled in the centralized cooling part, and effectively buffer and eliminate the oil return pressure.

[0016] In addition, the built-in integrated cooling filtering and defoaming device of the coal mining machine hydraulic system of the present application can filter the impurities in the total hydraulic system oil return, avoid the foam and impurities generated by the large amount of hydraulic system oil return, thereby eliminating the gear pump suction and blockage caused by the suction of foam air and impurities by the oil suction filter, and thus ensuring the oil quality returned to the hydraulic oil tank and the good operation of the hydraulic system. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor. In the drawings:

[0018] Figure 1 is a structural schematic diagram of a coal mining machine hydraulic system of the prior art;

[0019] Figure 2a and Figure 2b is a structural schematic diagram of a built-in cooler in the coal mining machine hydraulic system of the prior art, wherein Figure 2b is Figure 2a a side view of

[0020] Figure 3 is a structural schematic diagram of a coal mining machine hydraulic system of the prior art;

[0021] Figure 4a and Figure 4b is a structural schematic diagram of the built-in integrated cooling filtering defoaming device of the hydraulic system of the coal mining machine of the present application, wherein Figure 4b is Figure 4a is a side view of

[0022] Figure 5a and Figure 5b is a structural schematic diagram of the cooler in the built-in integrated cooling filtering defoaming device of the hydraulic system of the coal mining machine of the present application, wherein Figure 5b is Figure 5a is a side view of

[0023] Figure 6a and Figure 6b is a structural schematic diagram of the integrated shell in the built-in integrated cooling filtering defoaming device of the hydraulic system of the coal mining machine of the present application, wherein Figure 6b is Figure 6a is a side view of

[0024] BRIEF DESCRIPTION OF DRAWINGS

[0025] 1-hydraulic oil tank, 2-gauge, 3-oil suction filter, 4-air cleaner, 5-filter, 6-multiple valve oil return pipeline, 7-cooler, 71-cooling head, 72-support frame, 73-cooling pipe, 74-cooling water inlet, 75-cooling water outlet, 8-brake oil return pipeline, 9-motorized oiling motor pump oil return pipeline;

[0026] 1-steel wire rope reel, 2-pulley, 3-double reel, 4-steel wire rope, 5-load hoist;

[0027] 10-hydraulic oil tank, 11-gauge, 12-oil suction filter, 13-air cleaner, 14-integrated cooling filtering defoaming device, 15-oil collecting valve block, 16-multiple valve oil return pipeline, 17-brake oil return pipeline, 18-motorized oiling motor pump oil return pipeline;

[0028] 141-spiral finned tube cooler, 142-integrated shell, 143-centralized cooling part, 144-laminar flow filtering part, 145-damping buffer belt, 146-hydraulic system total oil return port, 147-zebra block;

[0029] 1411-cooling head, 1412-support frame, 1413-spiral finned tube, 1414-cooling water inlet, 1415-cooling water outlet;

[0030] 1421-flange, 1422-housing, 1422.1-large diameter part, 1422.2-small diameter part, 1423-anti-foaming layer, 1423.1-first anti-foaming layer, 1423.2-second anti-foaming layer, 1424-laminar flow filter layer, 1424.1-first laminar flow filter layer, 1424.2-second laminar flow filter layer, 1425-end seat, 1426-damping buffer groove, 1427-bellows block interface, 1428-cooler interface. DETAILED DESCRIPTION

[0031] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be described clearly and completely below in combination with specific embodiments of the present application and corresponding drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] As shown in Figure 3 , the coal mining machine hydraulic system with built-in integrated cooling filtering and defoaming device of the present application comprises a hydraulic oil tank 10, a liquid level meter 11, an oil suction filter 12, an air filter 13, an integrated cooling filtering and defoaming device 14, an oil collecting valve block 15, a multi-way valve oil return pipeline 16, a brake oil return pipeline 17, a motorized oiling motor pump oil return pipeline 18.

[0033] Compared with the conventional coal mining machine hydraulic system of the prior art, the coal mining machine hydraulic system with built-in integrated cooling filtering and defoaming device of the present application has the integrated cooling filtering and defoaming device 14 built in, and the oil collecting valve block 15 is arranged in the hydraulic system oil supply pipeline, which collects the multi-way valve oil return pipeline 16, the brake oil return pipeline 17, the motorized oiling motor pump oil return pipeline 18 and other hydraulic system oil return pipelines of each oil circuit component into one total oil return pipeline and then connects to the integrated cooling filtering and defoaming device 14.

[0034] As shown in Figure 4a and Figure 4b , Figure 5a and Figure 5b , Figure 6a and Figure 6b , the built-in integrated cooling filtering and defoaming device 14 of the coal mining machine hydraulic system of the present application is an integrated combined structure built in the hydraulic oil tank 10, which integrates the functions of cooling, filtering and defoaming, and comprises a spiral fin tube cooler 141, an integrated housing 142, a centralized cooling part 143, a laminar flow filtering part 144, a damping buffer belt 145, a hydraulic system total oil return port 146 and a bellows block 147. In the entire application, the bellows block refers to a hinged rotatable pipe joint used for pipeline connection in the hydraulic system.

[0035] The spiral finned tube cooler 141 comprises a cooling head 1411, a support frame 1412, a spiral finned tube 1413, and a cooling water inlet 1414 and a cooling water outlet 1415 arranged on the cooling head 1411, through which cooling water is introduced to cool the oil in the hydraulic oil tank 10.

[0036] The spiral finned tube cooler 141 is installed in an invasive manner, and the spiral finned tube invades the oil in the oil tank, and the cooling water flows through the spiral finned tube to take away the heat of the oil to be cooled. The heat dissipation efficiency of the spiral finned tube is 1.5 times that of the traditional copper tube and stainless steel tube, and the pressure resistance is more than 10 MPa.

[0037] The integrated shell 142 comprises a flange 1421, an outer shell 1422, a defoaming layer 1423, a laminar flow filtering layer 1424, an end seat 1425, a damping buffer groove 1426, a block interface 1427, and a cooler interface 1428, wherein the block interface 1427 and the cooler interface 1428 are arranged on the flange 1421 of the integrated shell 142.

[0038] The outer shell 1422 of the integrated shell 142 comprises a large-diameter portion 1422.1 on one side of the flange 1421 and a small-diameter portion 1422.2 away from the other side of the flange 1421, the defoaming layer 1423 comprises a first defoaming layer 1423.1 and a second defoaming layer 1423.2, the laminar flow filtering layer 1424 comprises a first laminar flow filtering layer 1424.1 and a second laminar flow filtering layer 1424.2, the first defoaming layer 1423.1 is arranged on the inner periphery of the large-diameter portion 1422.1, the second defoaming layer 1423.2 is arranged on the inner periphery of the small-diameter portion 1422.2, the first laminar flow filtering layer 1424.1 is arranged in the inner circular cavity of the large-diameter portion 1422.1, and the second laminar flow filtering layer 1424.2 is arranged in the inner circular cavity of the small-diameter portion 1422.2. The first laminar flow filtering layer 1424.1 and the second laminar flow filtering layer 1424.2 form the laminar flow filtering portion 144 of the integrated cooling and filtering defoaming device 14.

[0039] The spiral finned tube cooler 141 is installed in the integrated shell 142 through the cooler interface 1428. The oil collecting valve block 15 of the hydraulic system of the coal mining machine is connected to the hydraulic system total oil return port 146, which is connected to the swivel block interface 1427 by the swivel block 147. The oil returns of the hydraulic system oil circuit components are collected and then enter the large diameter part 1422.1 of the integrated shell 142 of the integrated cooling, filtering and defoaming device 14. The space of the large diameter part 1422.1, except for the space occupied by the spiral finned tube cooler 141 and the first laminar flow filter layer 1424.1, forms the above-mentioned concentrated cooling part 143 of the integrated cooling, filtering and defoaming device 14. Thus, through the concentrated cooling part 143, the oil return of the hydraulic system can be first cooled by the spiral finned tube cooler 141 in time, concentratedly and efficiently.

[0040] The end seat 1425 is installed at the end of the small diameter part 1422.2 of the shell 1422 of the integrated shell 142, and the damping buffer groove 1426 is opened in the circumferential direction of the end seat 1425. The above-mentioned damping buffer belt 145 is installed in the damping buffer groove 1426.

[0041] The working process of the built-in integrated cooling, filtering and defoaming device of the hydraulic system of the coal mining machine is as follows: in the coal mining machine hydraulic system using the built-in integrated cooling, filtering and defoaming device of the hydraulic system of the coal mining machine, all the oil returns of the hydraulic system are first collected into the oil collecting valve block 15, and then collected into the integrated shell 142 of the integrated cooling, filtering and defoaming device 14 through the hydraulic system total oil return port 146 built in the hydraulic oil tank 10. The oil return pressure is buffered and eliminated by the integrated shell 142, and the oil return is first cooled by the spiral finned tube cooler 141 in the concentrated cooling part 143. After being cooled, the oil return is defoamed, precipitated and filtered by the defoaming layer 1423 and the laminar flow filter layer 1424 arranged in the integrated shell 142, and then returned to the hydraulic oil tank 10.

[0042] In summary, compared with the prior art, the built-in integrated cooling, filtering and defoaming device of the hydraulic system of the coal mining machine has the following advantages and beneficial effects:

[0043] 1) The built-in integrated design integrates the multiple functions of cooling, oil return pressure buffering, defoaming, precipitation and filtering, without the need for separate configuration of individual functional components. The connection pipeline span is short, the specific functions cannot be realized due to objective external space limitations are avoided, the structure is compact, the space is maximally saved, the cost is low, the maintenance is convenient, the function is powerful, and the system stability is high. At the same time, the built-in integrated design improves the adaptability of the device in high temperature, humid, vibration and dusty environments.

[0044] 2) Compared with the light pipe pipeline of traditional copper pipe and stainless steel pipe, the spiral finned tube cooler in the application has a greatly increased heat dissipation area under the condition of the same length and diameter, the heat dissipation efficiency is 1.5 times of that of the light pipe pipeline of traditional copper pipe and stainless steel pipe, and the pressure resistance can reach 10 MPa, so the cooler can be made smaller and more exquisite.

[0045] 3) The integrated shell can protect the spiral finned tube cooler from being damaged by external objects, and can enable the hydraulic system return oil to be cooled in time, centrally and efficiently in the centralized cooling part. Moreover, since the hydraulic system return oil has a certain return oil pressure, directly discharging into the oil tank can cause impact disturbance to the oil in the hydraulic oil tank, and the integrated shell can effectively buffer and eliminate the return oil pressure.

[0046] 4) After the cooled return oil passes through the defoaming and sedimentation and filtration of the defoaming layer and the laminar flow filtration layer arranged in the integrated shell, the return oil is returned to the hydraulic oil tank, the impurities in the total return oil of the hydraulic system are filtered, the foam and impurities generated by a large amount of return oil of the hydraulic system are avoided, so that the suction of foam air and impurities by the suction filter is avoided, the suction and blockage of the gear pump are avoided, the quality of the oil returned to the hydraulic oil tank is ensured, and the good operation of the hydraulic system is ensured.

[0047] 5) The end seat of the integrated shell is provided with a damping buffer belt, which can effectively reduce the influence of external equipment vibration and oil fluctuation in the hydraulic oil tank on the integrated cooling, filtering and defoaming device.

[0048] It should be noted that, in the present document, relational terms such as“first” and“second”, and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms“comprises”,“comprising”, or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Furthermore, the articles“a”,“an”, and“the” as used in the present document are intended to mean“one or more” or“at least one”, unless specified otherwise or clear from the context to be taken to indicate only“one” or, when used in the context of claiming a composition of a mixture that comprises components A, B and C, “the” can be taken to denote one, two or all of those constituents of the mixture.

[0049] Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the present application; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that the technical solutions recorded in the foregoing examples can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. An integrated built-in cooling, filtering and deaerating device for a hydraulic system of a coal mining machine, characterized in that, The application relates to an integrated cooling, filtering and defoaming device for a hydraulic system of a coal mining machine. The integrated shell comprises a flange, an outer shell, a defoaming layer, a laminar flow filtering layer forming the laminar flow filtering part, an end seat, a damping buffer groove, a block interface and a cooler interface, wherein the block interface and the cooler interface are arranged on the flange. The spiral fin tube cooler is installed in the integrated shell through the cooler interface, the hydraulic system total oil return port is communicated with a coal mining machine hydraulic system oil collecting valve block and connected to the block interface through the block, and the oil collecting valve block collects all oil return pipelines of the hydraulic system into one pipeline. The end seat is installed at the end of the integrated shell away from the flange, the damping buffer groove is arranged on the end seat, and the damping buffer belt is installed in the damping buffer groove. The outer shell comprises a large-diameter part on one side of the flange and a small-diameter part away from the flange, the defoaming layer comprises a first defoaming layer and a second defoaming layer, the laminar flow filtering layer comprises a first laminar flow filtering layer and a second laminar flow filtering layer, the first defoaming layer is arranged on the inner periphery of the large-diameter part, the second defoaming layer is arranged on the inner periphery of the small-diameter part, the first laminar flow filtering layer is arranged in the inner circular cavity of the large-diameter part, and the second laminar flow filtering layer is arranged in the inner circular cavity of the small-diameter part. The oil return of each oil circuit executing component of the hydraulic system is collected and then enters the large-diameter part of the integrated shell, and the space of the large-diameter part except the space occupied by the spiral fin tube cooler and the first laminar flow filtering layer forms the centralized cooling part of the integrated cooling, filtering and defoaming device. The end seat is installed at the end of the small-diameter part. The spiral fin tube cooler comprises a cooling head, a support frame, a spiral fin tube and a cooling water inlet and a cooling water outlet arranged on the cooling head.

2. The built-in integrated cooling, filtering and de-foaming device of a coal mining machine hydraulic system according to claim 1, characterized in that, The spiral fin tube cooler adopts a spiral fin tube invasive installation mode, and the spiral fin tube invades the oil tank oil of the hydraulic system.

3. The built-in integrated cooling, filtering and de-foaming device of a coal mining machine hydraulic system according to claim 2, characterized in that, ​

Images