阅读说明：本技术 采煤机摇臂壳体油道孔通畅性试验装置和提高采煤机摇臂壳体油道孔清洁度的方法 (Device for testing smoothness of oil passage hole of rocker arm shell of coal mining machine and method for improving cleanliness of oil passage hole of rocker arm shell of coal mining machine ) 是由 王江 李辉杰 韩峰 罗毅 杨柳 许寄桥 余会挺 张云杰 沈言俊 沈胜超 张尧 于 2020-12-09 设计创作，主要内容包括：本发明涉及一种采煤机摇臂壳体油道孔通畅性试验装置和提高采煤机摇臂壳体油道孔清洁度的方法,装置包括进、出水接头,进水接头内设有相连通的纵向通水孔和横向通水孔二者在进水接头表面的开口分别为进水口和出水口；出水接头包括第一、第二盘状部和连在二者之间的杆状部,第一盘状部内设有横向通孔,与贯穿杆状部和第二盘状部的纵向通孔连通,横向、纵向通孔在出水接头表面的开口分别为进水口和出水口；所述方法是采用所述装置对摇臂壳体油道孔进行通畅性检查,同时将油道孔内残留的杂质冲洗出来。本发明能实现摇臂壳体油道孔通畅性试验,清理油道孔内的铁屑、焊渣等杂质,明显提高油道孔清洁度。(The invention relates to a device for testing the smoothness of an oil passage hole of a rocker arm shell of a coal mining machine and a method for improving the cleanliness of the oil passage hole of the rocker arm shell of the coal mining machine, wherein the device comprises a water inlet joint and a water outlet joint, and the water inlet joint is internally provided with a longitudinal water through hole and a transverse water through hole which are communicated with each other; the water outlet joint comprises a first disc-shaped part, a second disc-shaped part and a rod-shaped part connected between the first disc-shaped part and the second disc-shaped part, a transverse through hole is arranged in the first disc-shaped part and is communicated with a longitudinal through hole penetrating through the rod-shaped part and the second disc-shaped part, and openings of the transverse through hole and the longitudinal through hole on the surface of the water outlet joint are a water inlet and a water outlet respectively; the method is characterized in that the device is adopted to carry out smoothness inspection on the oil passage hole of the rocker arm shell, and simultaneously, residual impurities in the oil passage hole are washed out. The rocker arm shell oil passage hole smoothness test device can realize a rocker arm shell oil passage hole smoothness test, clear impurities such as scrap iron, welding slag and the like in the oil passage hole, and obviously improve the cleanliness of the oil passage hole.)

1. The utility model provides a unobstructed test device of coal-winning machine rocking arm casing oil duct hole which characterized in that: the water inlet joint is a rotary part, and is internally provided with a longitudinal limber hole and a transverse limber hole which are mutually communicated, the openings of the longitudinal limber hole and the transverse limber hole on the surface of the water inlet joint are respectively a water inlet and a water outlet, and the longitudinal limber hole and the transverse limber hole are respectively positioned on the end surface and the cylindrical surface of one end of the water inlet joint; the water outlet joint comprises a first disc-shaped part and a second disc-shaped part which are positioned at two ends, and a rod-shaped part connected between the two disc-shaped parts, wherein a transverse through hole is formed in the first disc-shaped part and is sequentially communicated with a longitudinal through hole penetrating through the rod-shaped part and the second disc-shaped part, the openings of the transverse through hole and the longitudinal through hole on the surface of the water outlet joint are respectively a water inlet and a water outlet, and the transverse through hole and the longitudinal through hole are respectively positioned on the cylindrical surface of the first disc-shaped part and the outer end surface of the second.

2. The testing device for the patency of the oil duct hole of the rocker arm shell of the coal mining machine as claimed in claim 1, characterized in that: the water inlet joint is characterized in that a flange table is arranged at one end of the water inlet joint, a water inlet of the water inlet joint is arranged on an outer end face of the flange table, a sealing groove is respectively formed in the two axial sides of a water outlet of the water inlet joint on the cylindrical surface of the water inlet joint, a first annular groove is formed between the two sealing grooves on the cylindrical surface of the water inlet joint, the water outlet of the water inlet joint is located on the bottom surface of the first annular groove, and the groove width of the first annular groove is larger than the maximum linear size of the water outlet of the water inlet joint.

3. The testing device for the patency of the oil duct hole of the rocker arm shell of the coal mining machine as claimed in claim 2, characterized in that: and a water inlet of the water inlet joint is provided with a threaded hole.

4. The device for testing the patency of the oil duct hole of the rocker arm shell of the coal mining machine as claimed in claim 2 or 3, wherein: the water outlet joint comprises a flange plate, a transition pipe and a water passing plate, the flange plate, the transition pipe and the water passing plate are sequentially connected in an installation state, the water passing plate and the flange plate serve as the large part or all of the first disc-shaped part and the second disc-shaped part respectively, the large part or all of the transition pipe serves as the rod-shaped part, and the first connection mode is as follows: the front end of the transition pipe is inserted into the flange plate, a detachable anti-rotation structure is arranged between the front end of the transition pipe and the flange plate, the rear end of the transition pipe is in threaded connection with the inside of the water passing disc, the transition pipe and the water passing disc are sealed, the transverse through hole is positioned in the water passing disc, a section of axial through hole is also arranged in the water passing disc, the axial through hole is communicated with a through hole which axially penetrates through the transition pipe, the axial through hole and the through hole are combined into the longitudinal through hole, and the axial through hole is communicated with the transverse through hole in the water passing disc; the second connection mode is as follows: the flange plate, the transition pipe and the water passing plate are sequentially in butt joint and are in seal welding, the transverse through hole is located in the water passing plate, a section of axial through hole is further formed in the water passing plate and penetrates through the transition pipe and the through hole of the flange plate in the axial direction, the axial through hole and the transverse through hole are sequentially communicated, the axial through hole, the transition pipe and the through hole of the flange plate are combined into the longitudinal through hole, and the axial through hole and the transverse through hole are communicated in the water passing plate.

5. The testing device for the patency of the oil duct hole of the rocker arm shell of the coal mining machine as set forth in claim 4, characterized in that: the water passing disc is characterized in that a front sealing groove and a rear sealing groove are formed in the cylindrical surface of the water passing disc, a second annular groove is formed between the front sealing groove and the rear sealing groove, the water inlet of the water outlet connector is located on the bottom surface of the second annular groove, the groove width of the second annular groove is larger than the maximum linear size of the water inlet of the water outlet connector, and the water outlet of the water outlet connector is provided with a threaded hole.

6. The testing device for the patency of the oil duct hole of the rocker arm shell of the coal mining machine as claimed in claim 5, characterized in that: the water passing disc is of a stepped disc-shaped structure consisting of a front cylinder, a rear cylinder and a small back cylinder, the front sealing groove is positioned on the front cylinder, and the second annular groove and the rear sealing groove are positioned on the rear cylinder.

7. The testing device for the patency of the oil duct hole of the rocker arm shell of the coal mining machine as set forth in claim 6, characterized in that: when the flange plate, the transition pipe and the water passing plate are connected in a mode, a baffle ring is fixedly arranged at the front part of the transition pipe, and the transition pipe is attached to the front end face of the baffle ring in an installation state to realize forward movement limiting on the rear end face of the flange plate.

8. The testing device for the patency of the oil duct hole of the rocker arm shell of the coal mining machine as claimed in claim 7, characterized in that: the rear end part of the transition pipe is arranged into a stepped structure with a thick front part and a thin rear part, and the ring surface of the rear end of the thick pipe section and the front end surface of the water passing disc are sealed through a combined gasket.

9. A method for improving the cleanliness of an oil duct hole of a rocker arm shell of a coal mining machine is characterized by comprising the following steps: the smoothness test device for the oil channel hole of the coal mining machine rocker arm shell according to claim 5, 6, 7 or 8 is adopted to perform the smoothness test for the oil channel hole of the coal mining machine rocker arm shell, and specifically, the water inlet joint is arranged in the high-speed lubricating pump mounting shaft hole and/or the low-speed lubricating pump mounting shaft hole, so that the cylindrical surface of the water inlet joint is in clearance fit with the high-speed lubricating pump mounting shaft hole or the low-speed lubricating pump mounting shaft hole where the water inlet joint is arranged, a sealing element is arranged in a sealing groove of the water inlet joint, and meanwhile, a first annular groove of the water inlet joint is communicated with the oil inlet channel hole with an opening in the corresponding shaft hole, the flange table is detachably fixed on the coal mining machine rocker arm shell and is axially positioned by utilizing; the water outlet joints are respectively and coaxially arranged at the mounting shaft holes of the transmission shafts communicated with the oil outlet channel holes, so that the cylindrical surface of the water passing disc is in clearance fit with the mounting shaft holes of the transmission shafts, sealing elements are arranged in the front sealing groove and the rear sealing groove, the second ring groove is communicated with the corresponding oil outlet channel holes, the flange plate is arranged in the flange plate mounting hole of the bearing seat coaxially and oppositely arranged on the shell of the coal cutter and the mounting shaft holes of the transmission shafts, and the transition pipe is positioned in the inner cavity of the rocker arm shell; and keeping the water outlets of the water outlet connectors corresponding to the oil outlet passage holes to be detected in an open state, plugging the water outlets of the other water outlet connectors by using the plugs, continuously introducing high-pressure water to the water inlets of the water inlet connectors to perform a smoothness test, and simultaneously flushing the whole oil passage branch where the oil outlet passage holes to be detected are located.

10. The method for improving the cleanliness of the oil gallery hole of the rocker arm housing of the coal mining machine as claimed in claim 9, wherein: when the rocker arm shell is machined, the oil groove cover plate is welded in a segmented welding mode, the oil groove is cleaned firstly, then most of the oil groove cover plates are welded, only one section of the oil groove cover plate which is just opposite to the oil passage hole is kept without being welded, then semi-finishing and finishing of the rocker arm shell are carried out, the oil passage hole is machined and cleaned in a mode of being sucked by an iron-absorbing rod, and finally one section of the oil groove cover plate which is just opposite to the oil passage hole is welded.

11. The method for improving the cleanliness of the oil gallery hole of the rocker arm housing of the coal mining machine as claimed in claim 10, wherein: before the oil duct hole is machined, a partition plate is welded at each of two ends of a welding position of a section of oil duct cover plate facing the oil duct hole to block a welded part of the oil duct, and after the oil duct hole is machined, the partition plate is cut off, and then a section of oil duct cover plate facing the oil duct hole is welded.

Technical Field

The invention relates to a device for testing the smoothness of an oil passage hole and a method for improving the cleanliness of the oil passage hole of a rocker arm shell of a coal mining machine by adopting the device.

Background

A plurality of oil passage holes are usually formed in a rocker arm shell of the coal mining machine provided with a forced lubrication system and used for communicating an oil groove with each shaft hole, wherein an oil inlet passage hole is connected with a high-speed lubricating pump mounting shaft hole and a low-speed lubricating pump mounting shaft hole, and an oil outlet passage hole is connected with a transmission shaft mounting shaft hole. According to the existing rocker arm shell machining process, iron chips, welding slag and other retained oil passage holes are inevitable in the machining process, impurities such as the iron chips, the welding slag and the like can be brought into oil passages, shell inner cavities and other places when a forced lubricating system runs, and damage is caused to a transmission machine in a rocker arm shell, for example, the problems of dent, bearing damage, high oil temperature, abnormal noise and the like of gear meshing parts are caused.

Disclosure of Invention

The invention aims to provide a device for testing the smoothness of an oil passage hole of a rocker arm shell of a coal mining machine and a method for improving the cleanliness of the oil passage hole of the rocker arm shell of the coal mining machine, which can not only test the smoothness of the machined rocker arm shell of the coal mining machine, but also effectively clean impurities such as scrap iron, welding slag and the like in the oil passage hole.

The main technical scheme of the invention is as follows:

a coal mining machine rocker arm shell oil passage hole patency test device comprises a water inlet joint, a water outlet joint and a plug, wherein the water inlet joint is a rotary part, a longitudinal water through hole and a transverse water through hole which are mutually communicated are arranged in the water inlet joint, the openings of the longitudinal water through hole and the transverse water through hole on the surface of the water inlet joint are a water inlet and a water outlet respectively, and the longitudinal water through hole and the transverse water through hole are respectively positioned on the end face of one end of the water inlet joint and the cylindrical surface; the water outlet joint comprises a first disc-shaped part and a second disc-shaped part which are positioned at two ends, and a rod-shaped part connected between the two disc-shaped parts, wherein a transverse through hole is formed in the first disc-shaped part and is sequentially communicated with a longitudinal through hole penetrating through the rod-shaped part and the second disc-shaped part, the openings of the transverse through hole and the longitudinal through hole on the surface of the water outlet joint are respectively a water inlet and a water outlet, and the transverse through hole and the longitudinal through hole are respectively positioned on the cylindrical surface of the first disc-shaped part and the outer end surface of the second.

The one end of water supply connector can be equipped with the flange platform, and the water inlet of water supply connector is seted up on the outer end terminal surface that is equipped with the flange platform, on the face of cylinder of water supply connector, the axial both sides of the delivery port of water supply connector are equipped with a seal groove respectively, be equipped with a first annular on the face of cylinder of water supply connector, between two seal grooves, the delivery port of water supply connector is located on the tank bottom surface of first annular, the groove width of first annular is greater than the maximum linear dimension of the delivery port of water supply connector.

The water inlet of the water inlet joint is preferably provided with a threaded hole.

The water outlet joint comprises a flange plate, a transition pipe and a water passing plate, the flange plate, the transition pipe and the water passing plate are sequentially connected in an installation state, the water passing plate and the flange plate serve as the large part or all of the first disc-shaped part and the second disc-shaped part respectively, the large part or all of the transition pipe serves as the rod-shaped part, and the first connection mode is as follows: the front end of the transition pipe is inserted into the flange plate, a detachable anti-rotation structure is arranged between the front end of the transition pipe and the flange plate, the rear end of the transition pipe is in threaded connection with the inside of the water passing disc, the transition pipe and the water passing disc are sealed, the transverse through hole is positioned in the water passing disc, a section of axial through hole is also arranged in the water passing disc, the axial through hole is communicated with a through hole which axially penetrates through the transition pipe, the axial through hole and the through hole are combined into the longitudinal through hole, and the axial through hole is communicated with the transverse through hole in the water passing disc; the second connection mode is as follows: the flange plate, the transition pipe and the water passing plate are sequentially in butt joint and are in seal welding, the transverse through hole is located in the water passing plate, a section of axial through hole is further formed in the water passing plate and penetrates through the transition pipe and the through hole of the flange plate in the axial direction, the axial through hole and the transverse through hole are sequentially communicated, the axial through hole, the transition pipe and the through hole of the flange plate are combined into the longitudinal through hole, and the axial through hole and the transverse through hole are communicated in the water passing plate.

The water passing disc is characterized in that a front sealing groove and a rear sealing groove are formed in the cylindrical surface of the water passing disc, a second annular groove is formed between the front sealing groove and the rear sealing groove, the water inlet of the water outlet connector is located on the bottom surface of the second annular groove, the groove width of the second annular groove is larger than the maximum linear size of the water inlet of the water outlet connector, and the water outlet of the water outlet connector is provided with a threaded hole.

Furthermore, the water passing disc can be a stepped disc-shaped structure consisting of a front cylinder and a rear cylinder, the front sealing groove is positioned on the front cylinder, and the second ring groove and the rear sealing groove are positioned on the rear cylinder.

When the flange plate, the transition pipe and the water passing plate are connected, a baffle ring is preferably and fixedly arranged at the front part of the transition pipe, and the transition pipe is attached to the front end face of the baffle ring in an installation state to realize forward movement limiting on the rear end face of the flange plate.

The rear end part of the transition pipe can be set into a ladder structure with a thick front part and a thin rear part, and the ring surface at the rear end of the thick pipe section and the front end surface of the water passing disc are sealed through a combined gasket.

A method for improving the cleanliness of an oil channel hole of a rocker arm shell of a coal mining machine mainly comprises the steps of carrying out an oil channel hole smoothness test on the rocker arm shell of the coal mining machine by adopting the coal mining machine rocker arm shell oil channel hole smoothness test device, specifically, installing a water inlet joint in a high-speed lubricating pump installation shaft hole and/or a low-speed lubricating pump installation shaft hole, enabling a cylindrical surface of the water inlet joint to be in clearance fit with the high-speed lubricating pump installation shaft hole or the low-speed lubricating pump installation shaft hole where the water inlet joint is located, installing a sealing element in a sealing groove of the water inlet joint, enabling a first annular groove of the water inlet joint to be communicated with an oil inlet oil channel hole with an opening in the corresponding shaft hole, detachably fixing a flange platform on the rocker arm shell of the coal mining machine; the water outlet joints are respectively and coaxially arranged at the mounting shaft holes of the transmission shafts communicated with the oil outlet channel holes, so that the cylindrical surface of the water passing disc is in clearance fit with the mounting shaft holes of the transmission shafts, sealing elements are arranged in the front sealing groove and the rear sealing groove, the second ring groove is communicated with the corresponding oil outlet channel holes, the flange plate is arranged in the flange plate mounting hole of the bearing seat coaxially and oppositely arranged on the shell of the coal cutter and the mounting shaft holes of the transmission shafts, and the transition pipe is positioned in the inner cavity of the rocker arm shell; and keeping the water outlets of the water outlet connectors corresponding to the oil outlet passage holes to be detected in an open state, plugging the water outlets of the other water outlet connectors by using the plugs, continuously introducing high-pressure water to the water inlets of the water inlet connectors to perform a smoothness test, and simultaneously flushing the whole oil passage branch where the oil outlet passage holes to be detected are located.

When the rocker arm shell is machined, the oil groove cover plate is welded in a segmented welding mode, the oil groove is cleaned firstly, then most of the oil groove cover plates are welded, only one section of the oil groove cover plate which is just opposite to the oil passage hole is kept without being welded, then semi-finishing and finishing of the rocker arm shell are carried out, the oil passage hole is machined and cleaned in a mode of being sucked by an iron-absorbing rod, and finally one section of the oil groove cover plate which is just opposite to the oil passage hole is welded.

Furthermore, before the oil passage hole is machined, a partition plate is welded at each of two ends of a welding position of a section of oil groove cover plate facing the oil passage hole to block a welded part of the oil groove, after the oil passage hole is machined, the partition plate is cut off, and then a section of oil groove cover plate facing the oil passage hole is welded.

The invention has the beneficial effects that:

the testing device can be used for realizing the smoothness test after the rocker arm shell of the coal mining machine is processed, testing the smoothness of the whole oil circuit of the forced lubrication system mainly comprising the oil passage hole, and testing the processing technology control level of the rocker arm shell from one aspect.

Because the process of carrying out the patency test also is the process of clearance oil duct hole, avoids iron fillings, welding slag to remain, consequently has improved the cleanliness in oil duct hole, ensures that forced lubrication system and rocker arm drive mechanism move under more clean environment, reduces forced lubrication system and rocker arm drive mechanism's fault rate, improves its life.

Drawings

FIG. 1 is a schematic structural view of one embodiment of the water inlet joint;

FIG. 2 is a schematic structural view of one embodiment of the water outlet joint;

FIG. 3 is a schematic structural view of the water passing tray of FIG. 2;

FIG. 4 is a schematic structural view of another embodiment of the water outlet joint;

FIG. 5 is a schematic view of the installation of the water intake nipple of FIG. 1 on a shearer ranging arm housing;

FIG. 6 is a schematic view of the installation of the water outlet nipple shown in FIG. 2 on a shearer ranging arm housing;

fig. 7 is a schematic view of oil passage hole machining.

Reference numerals:

1. a water inlet joint; 1-1, longitudinal water through holes; 1-11. water inlet; 1-2, transverse water through holes; 1-21, water outlet; 1-3, sealing the groove; 1-4, a first ring groove; 2. a water outlet joint; 2-1, transverse through holes; 2-11. water inlet; 2-2, longitudinal through holes; 2-21, water outlet; 2-3, a flange plate; 2-4. transition pipe; 2-41, baffle ring; 2-5, passing through a water tray; 2-51. front seal groove; 2-52, a rear sealing groove; 2-6, a second ring groove; 3. a rocker arm housing; 3-1, oil groove; 3-2, an oil inlet channel hole is formed; 3-3, oil outlet oil passage holes; 3-4, inner cavity; 4. an oil groove cover plate; 5. a separator.

Detailed Description

The invention discloses a device for testing the smoothness of an oil passage hole of a rocker arm shell of a coal mining machine (which can be called as the oil passage hole smoothness test device for short), which comprises a water inlet connector 1, a water outlet connector 2 and a plug as shown in figures 1-4 and 7. The water inlet joint 1 is a rotary part, a longitudinal water through hole 1-1 and a transverse water through hole 1-2 which are communicated with each other are arranged in the water inlet joint, openings of the longitudinal water through hole and the transverse water through hole on the surface of the water inlet joint are a water inlet 1-11 and a water outlet 1-21 respectively, and the openings of the longitudinal water through hole and the transverse water through hole are located on the end face and the cylindrical surface of one end of the water inlet joint respectively. The water outlet joint 2 comprises a first disc-shaped part and a second disc-shaped part which are positioned at two ends, and a rod-shaped part connected between the two disc-shaped parts, wherein a transverse through hole 2-1 is arranged in the first disc-shaped part and is sequentially communicated with a longitudinal through hole 2-2 penetrating through the rod-shaped part and the second disc-shaped part, the openings of the transverse through hole and the longitudinal through hole on the surface of the water outlet joint are a water inlet 2-11 and a water outlet 2-21 respectively, and the openings of the transverse through hole and the longitudinal through hole are positioned on the cylindrical surface of the first disc-shaped part and the outer end surface.

One end of the water inlet joint is provided with a flange platform, a water inlet 1-11 of the water inlet joint is arranged on the end surface of the outer end provided with the flange platform, two axial sides of a cylindrical surface of the water inlet joint and a water outlet 1-21 of the water inlet joint are respectively provided with a sealing groove 1-3, and a sealing piece can be arranged in the sealing groove in a matched manner. And the annular surface at the other end of the flange table is used as an axial positioning surface when the water inlet joint is installed.

A first annular groove 1-4 is arranged on the cylindrical surface of the water inlet joint and between the two sealing grooves, the water outlet of the water inlet joint is positioned on the bottom surface of the first annular groove, and the groove width of the first annular groove is larger than the maximum linear size of the water outlet 1-21 of the water inlet joint. And when the transverse limber hole is a round hole, the maximum linear size of the water outlet of the water inlet joint is the diameter of the transverse limber hole. The diameter of the transverse water through hole is preferably equal to the diameter of an oil inlet channel hole formed in a lubricating pump mounting shaft hole in the coal cutter rocker arm shell and communicated with the oil groove. The horizontal limbers can set up a plurality ofly along water supply connector's radial direction interval to increase the flow, correspondingly water supply connector's delivery port also is a plurality ofly.

The water inlet of the water inlet joint is provided with a threaded hole so as to be convenient for connecting a water inlet pipe for a test.

The water outlet joint comprises a flange plate 2-3, a transition pipe 2-4 and a water passing plate 2-5 which are sequentially connected in an installation state. The water flow disk and the flange plate serve as most or all of the first disk portion and the second disk portion, respectively, and most or all of the transition tube serves as the rod portion.

The flange plate, the transition pipe and the water passing plate can adopt a first connection mode, as shown in fig. 2 and 3: the front end of the transition pipe penetrates through the flange plate to realize the insertion connection with the flange plate, a detachable anti-rotation structure is arranged between the flange plate and the transition pipe, the rear end of the transition pipe is in threaded connection with the inside of the water passing plate, and the transition pipe and the water passing plate are subjected to sealing treatment. The transverse through-holes 2-1 are located in the water passing tray and preferably extend in the radial direction of the water passing tray. And a section of axial through hole is also arranged in the water passing disc, the axial through hole is communicated with a through hole which axially penetrates through the transition pipe, and the axial through hole and the through hole are combined into the longitudinal through hole. The axial through hole is communicated with the transverse through hole in the water passing disc.

The flange plate, the transition pipe and the water passing plate can also adopt a second connection mode, as shown in fig. 4: the water passing plate is characterized in that the flange plate, the transition pipe and the water passing plate are sequentially in butt joint and are in seal welding, the transverse through hole 2-1 is located in the water passing plate, a section of axial through hole is further formed in the water passing plate, the axial through hole and the through hole which axially penetrates through the transition pipe and the flange plate are sequentially communicated, the axial through hole and the transverse through hole are combined to form the longitudinal through hole 2-2, and the axial through hole and the transverse through hole are communicated in the water passing plate.

The water passing disc 2-5 is further provided with a front sealing groove 2-51 and a rear sealing groove 2-52 on the outer cylindrical surface, a second annular groove 2-6 is arranged between the front sealing groove and the rear sealing groove, the water inlet of the water outlet connector is located on the bottom surface of the second annular groove, and the groove width of the second annular groove is larger than the maximum linear size of the water inlet of the water outlet connector. The same as the water inlet connector, when the transverse through hole is a round hole, the maximum linear dimension of the mouth part of the water inlet of the water outlet connector is the diameter of the transverse through hole. The water outlet of the water outlet joint is preferably provided with a threaded hole so as to be convenient for connecting the plug.

The diameter of the transverse through hole is preferably equal to the diameter of an oil outlet oil passage hole which is formed in the rocker arm shell of the coal mining machine and communicated with the installation shaft holes of the transmission shafts. The transverse through holes can be arranged in a plurality at intervals along the radial direction of the water passing disc so as to increase the flow, and correspondingly, the water inlet of the water outlet joint is also provided with a plurality of water inlets.

The water passing disc can be a stepped disc-shaped structure consisting of two cylinders with a large front part and a small rear part, as shown in fig. 2 and 3, in this case, the front sealing groove is positioned on the front cylinder, and the second ring groove and the rear sealing groove are positioned on the rear cylinder.

When the flange plate, the transition pipe and the water passing plate are connected in a first mode, the front part of the transition pipe is preferably fixedly provided with a baffle ring 2-41, and the transition pipe is attached to the rear end face of the flange plate by the front end face of the baffle ring in an installation state to realize forward movement limiting of the transition pipe. After the flange plate is fixed, the existence of the baffle ring can prevent the safety accident that high-pressure water sprays the water outlet joint from the front after pressure difference is formed between the water passing plate and the water passing plate due to the damage of the front and the rear sealing parts during the test.

The rear end part of the transition pipe is arranged into a stepped structure with a thick front part and a thin rear part, the thin pipe section is in threaded connection with the water passing disc, and the ring surface at the rear end of the thick pipe section and the front end surface of the water passing disc can be sealed through a combined gasket. The area around the opening of the axial through hole on the front end surface of the water passing disc is preferably subjected to spot facing treatment so as to improve the sealing effect.

A pair of planes parallel to each other are arranged on the cylindrical surface at the front end of the transition pipe so as to facilitate the operations such as clamping and the like when the water outlet joint is installed and disassembled by using tools, and the rest cylindrical surface is used for radial positioning between the transition pipe and the flange plate.

When the coal mining machine rocker arm is installed, the flange plate is fixed on the coal mining machine rocker arm shell. In this embodiment, the flange is a rectangular disk-shaped part.

The invention also discloses a method for improving the cleanliness of the oil duct hole of the rocker arm shell of the coal mining machine, which is mainly realized by adopting the device for testing the smoothness of the oil duct hole of the rocker arm shell of the coal mining machine to test the smoothness of the oil duct hole of the rocker arm shell 3 of the coal mining machine. The side wall of the coal mining machine rocker arm shell is provided with transmission shaft mounting shaft holes of a rocker arm transmission system, and is also provided with a high-speed lubricating pump mounting shaft hole and/or a low-speed lubricating pump mounting shaft hole, an oil groove 3-1, an oil inlet channel hole 3-2 (an oil inlet hole for short) and an oil outlet channel hole 3-3 (an oil outlet hole for short) are arranged in the entity of the coal mining machine rocker arm shell, wherein the high-speed lubricating pump mounting shaft hole and the low-speed lubricating pump mounting shaft hole are respectively communicated with the oil groove through the corresponding oil inlet holes, and part or all of the transmission shaft mounting shaft holes are respectively communicated with the oil groove through the corresponding oil outlet holes.

Firstly, a water inlet joint and a water outlet joint are installed, as shown in fig. 5 and 6, the water inlet joint 1 is installed in a high-speed lubricating pump installation shaft hole and/or a low-speed lubricating pump installation shaft hole, so that the cylindrical surface of the water inlet joint is in clearance fit with the high-speed lubricating pump installation shaft hole or the low-speed lubricating pump installation shaft hole where the cylindrical surface is located, a sealing piece is installed in a sealing groove of the water inlet joint, meanwhile, a first annular groove of the water inlet joint is communicated with an oil inlet hole with an opening in the corresponding shaft hole, a flange platform is detachably fixed on a rocker arm shell of a coal mining machine, and the flange platform is axially positioned by utilizing the end surface of. And the water outlet joints are respectively and coaxially arranged at the mounting shaft holes of the transmission shafts communicated with the oil outlet holes, so that the cylindrical surface of the water passing disc is in clearance fit with the mounting shaft hole of the transmission shaft, the sealing parts are arranged in the front sealing groove and the rear sealing groove, the second annular groove is communicated with the corresponding oil outlet hole, the flange plate is arranged in the flange plate mounting hole of the bearing seat coaxially opposite to the mounting shaft hole of the transmission shaft on the coal cutter shell, and the transition pipe is positioned in an inner cavity 3-4 of the rocker arm shell. The unilateral clearance quantity of above-mentioned clearance fit department is preferred 0.1mm, can effectively prevent the installation, dismantle the corresponding shaft hole to the rocking arm casing causes the fish tail during test device.

And keeping the water outlets of the water outlet connectors corresponding to the oil outlet holes to be detected in an open state, plugging the water outlets of the rest of the water outlet connectors by using the plugs, continuously introducing high-pressure water to the water inlets of the water inlet connectors for 3 minutes to perform a patency test, and simultaneously flushing the whole oil duct branch where the oil outlet holes to be detected are located.

For example, when the coal mining machine is lifted up, lubricating oil is lacked near the seven shafts, the high-speed lubricating pump acts, the high-speed lubricating pump pumps oil in an inner cavity 3-4 of a rocker arm shell near one shaft, and then the oil is pumped to straight tooth sections of five shafts, six shafts and seven shafts respectively through a high-speed lubricating pump mounting shaft hole and an oil inlet hole, an oil groove and oil outlets which are communicated with the five-to-seven shaft mounting shaft holes respectively, and the high-speed lubricating pump and corresponding oil ducts form the high-speed lubricating system. Similarly, when the coal mining machine is in mining, the part close to the first shaft is lack of lubricating oil, the low-speed lubricating pump plays a role at the moment, the low-speed lubricating pump pumps oil in the inner cavity 3-4 of the rocker arm shell close to the seventh shaft, and then the oil is respectively pumped to straight tooth sections of the first shaft, the second shaft, the third shaft and the fourth shaft through the low-speed lubricating pump mounting shaft hole, the oil inlet hole and the oil groove which are communicated with the low-speed lubricating pump mounting shaft hole, and the oil outlet holes which are respectively communicated with the first shaft mounting hole, the second shaft mounting hole, the third shaft mounting hole and the fourth.

According to the above example, when the smoothness test is performed on the oil passage hole of the high-speed lubrication system, the water inlet joint should be installed at the installation hole of the high-speed lubrication pump, so that the oil inlet hole at the installation hole of the high-speed lubrication pump is communicated with the first ring groove. And the water outlet joints are respectively arranged at the mounting shaft holes of the five shafts, the six shafts and the seven shafts, and the oil outlet hole at the corresponding shaft hole is communicated with the second ring groove on the corresponding water outlet joint so as to form a complete test waterway, namely a water inlet of the water inlet joint, a water outlet of the water inlet joint, a first ring groove, an oil inlet, an oil groove, an oil outlet communicated with the mounting shaft holes of the five shafts, the six shafts, the seven shafts, the second ring groove, a water inlet of the water outlet joint and a water outlet of the water outlet joint. When a smoothness test is performed on an oil passage hole of the low-speed lubricating system, the water inlet joint is arranged at the mounting shaft hole of the low-speed lubricating pump, so that the oil inlet hole at the mounting shaft hole of the low-speed lubricating pump is communicated with the first ring groove. And mounting shaft holes of the first shaft, the second shaft, the third shaft and the fourth shaft are respectively provided with a water outlet joint, and the oil outlet hole at the corresponding shaft hole is communicated with a second annular groove on the corresponding water outlet joint so as to form a complete test waterway of 'water inlet of a water inlet joint-water outlet of the water inlet joint-first annular groove-oil inlet-oil groove-oil outlet communicated with mounting shaft holes of the first shaft, the second shaft, the third shaft and the fourth shaft-water inlet of the water outlet joint-water outlet of the water outlet joint'.

When a smoothness test is carried out on an oil duct branch corresponding to one transmission shaft mounting shaft hole at each time, only the water outlet of the water outlet joint in the transmission shaft mounting shaft hole is kept in an open state, and the water outlets of the water outlet joints in the other transmission shaft mounting shaft holes are plugged by plug plugs. Injecting high-pressure water from the water inlet of the water inlet joint, keeping water flowing for 3min, checking the smoothness, plugging the water outlet of the water outlet joint, and changing the water outlets of other water outlet joints to be in an open state, so that the tests are carried out one by one.

In the test process, if residual scrap iron and welding slag are left in the oil inlet and the oil outlet, the scrap iron and the welding slag can be washed out by high-pressure water, so that the oil passage hole is cleaned while the smoothness of the oil passage hole is checked.

In addition, as shown in fig. 7, when the rocker arm shell is machined, the oil groove cover plate 4 is preferably welded in a segmented welding mode, the machining sequence is that firstly, oil groove cleaning is carried out, then most of the oil groove cover plate is welded, only one segment of the oil groove cover plate which is opposite to the oil passage hole is reserved and not welded, then semi-finishing and finishing of the rocker arm shell are carried out, the oil passage hole is machined, the machined oil passage hole is cleaned in a sucking mode through an iron sucking rod, and finally, one segment of the oil groove cover plate which is opposite to the oil passage hole is welded. Compared with the traditional processing technology of firstly processing the oil passage hole and then welding the oil groove cover plate, the cleanliness of the oil passage hole and the section of the oil groove opposite to the oil passage hole is ensured only by cleaning the oil passage hole and the section of the oil groove opposite to the oil passage hole, and the cleanliness of the whole oil passage of the forced lubrication system can be basically ensured.

Furthermore, before the oil passage hole is processed, the two ends of the welding position of the section of the oil groove cover plate which is opposite to the oil passage hole are respectively welded with a partition plate 5 to block the welded part of the oil groove, after the oil passage hole is processed, the partition plates are cut off, and the section of the oil groove cover plate which is opposite to the oil passage hole is welded, so that scrap iron generated when the oil passage hole is processed is prevented from entering the oil passage hole, and basic guarantee is provided for improving the cleanliness of the oil passage hole.

The terms front and back are used herein for the purpose of expressing relative positional relationships and are not intended to limit absolute orientations.