Test device for smoothness of oil passage holes in shearer rocker arm housing and method for improving cleanliness of oil passage holes in shearer rocker arm housing

Abstract

The present invention relates to a test device for the smoothness of oil passage holes in a shearer rocker arm housing and a method for improving the cleanliness of oil passage holes in a shearer rocker arm housing. The device includes inlet and outlet connectors. The inlet connector is provided with a longitudinally communicating water passage hole and a laterally communicating water passage hole, and the openings of the two on the surface of the inlet connector are respectively an inlet and an outlet. The outlet connector includes a first and a second disc-shaped part and a rod-shaped part connecting the two. The first disc-shaped part is provided with a laterally through hole, which is communicated with a longitudinally through hole passing through the rod-shaped part and the second disc-shaped part. The openings of the lateral and longitudinal through holes on the surface of the outlet connector are respectively an inlet and an outlet. The method is to use the device to check the smoothness of the oil passage holes in the rocker arm housing, and at the same time flush out the residual impurities in the oil passage holes. The present invention can realize the smoothness test of the oil passage holes in the rocker arm housing, clean impurities such as iron filings and welding slag in the oil passage holes, and significantly improve the cleanliness of the oil passage holes.

Description

Technical Field

[0001] The present invention relates to a device for testing the smoothness of oil passage holes and a method for improving the cleanliness of oil passage holes in a shearer rocker arm housing by using the device. Background Art

[0002] There are usually many oil passage holes in a shearer rocker arm housing provided with a forced lubrication system, which are used to connect the oil tank and each shaft hole. Among them, the oil inlet passage hole connects the high-speed lubrication pump installation shaft hole and the low-speed lubrication pump installation shaft hole, and the oil outlet passage hole connects the transmission shaft installation shaft hole. According to the existing processing technology of the rocker arm housing, it is inevitable that iron filings, welding slag, etc. remain in the oil passage holes during the processing. When the forced lubrication system operates, these impurities such as iron filings and welding slag will be carried into various places such as the oil passage and the inner cavity of the housing, causing harm to the transmission mechanism in the rocker arm housing, such as causing dents at the gear meshing part, bearing damage, high oil temperature, abnormal noise, etc. Summary of the Invention

[0003] The purpose of the present invention is to provide a device for testing the smoothness of oil passage holes in a shearer rocker arm housing and a method for improving the cleanliness of oil passage holes in a shearer rocker arm housing, which can not only test the smoothness after the processing of the shearer rocker arm housing, but also effectively clean impurities such as iron filings and welding slag in the oil passage holes.

[0004] The main technical solutions of the present invention are as follows:

[0005] A device for testing the smoothness of oil passage holes in a shearer rocker arm housing includes a water inlet joint, a water outlet joint and a plug. The water inlet joint is a rotary part, and its internal is provided with a longitudinally communicating water passage hole and a laterally communicating water passage hole. The openings of the longitudinally communicating water passage hole and the laterally communicating water passage hole on the surface of the water inlet joint are respectively a water inlet and a water outlet, and they are respectively located at one end face and the cylindrical surface of the water inlet joint; the water outlet joint includes a first disc-shaped part and a second disc-shaped part at both ends and a rod-shaped part connecting the two disc-shaped parts. A lateral through hole is provided in the first disc-shaped part, which is sequentially communicated with a longitudinal through hole passing through the rod-shaped part and the second disc-shaped part. The openings of the lateral 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 they are respectively located on the cylindrical surface of the first disc-shaped part and the outer end face of the second disc-shaped part.

[0006] One end of the water inlet joint may be provided with a flange platform. The water inlet of the water inlet joint is opened on the outer end face provided with the flange platform. On the cylindrical surface of the water inlet joint, on both sides of the axis of the water outlet of the water inlet joint, a sealing groove is respectively provided. On the cylindrical surface of the water inlet joint, between the two sealing grooves, a first annular groove is provided. 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 greater than the maximum linear dimension of the water outlet of the water inlet joint.

[0007] The water inlet of the water inlet joint is preferably arranged as a threaded hole.

[0008] The water outlet joint includes a flange, a transition pipe and a water passing plate. In the installed state, the three are connected in sequence. The water passing plate and the flange respectively act as most or all of the first disc-shaped part and the second disc-shaped part, and most or all of the transition pipe acts as the rod-shaped part. The first connection method is: the front end of the transition pipe is inserted into the flange, and a detachable anti-rotation structure is provided between the two. The rear end of the transition pipe is threadedly connected into the water passing plate, and a sealing treatment is performed between the transition pipe and the water passing plate. The transverse through hole is located in the water passing plate. There is also a section of axial through hole in the water passing plate. The axial through hole is communicated with the through hole axially penetrating the transition pipe, and the two are combined into the longitudinal through hole. The axial through hole is communicated with the transverse through hole in the water passing plate. The second connection method is: the flange, the transition pipe and the water passing plate are butt-jointed and sealed and welded in sequence. The transverse through hole is located in the water passing plate. There is also a section of axial through hole in the water passing plate. The axial through hole is communicated with the through holes axially penetrating the transition pipe and the flange in sequence, and the three are combined into the longitudinal through hole. The axial through hole is communicated with the transverse through hole in the water passing plate.

[0009] The cylindrical surface of the water passing plate is provided with a front sealing groove and a rear sealing groove. There is a second annular groove between the front and rear sealing grooves. The water inlet of the water outlet joint is located on the bottom surface of the second annular groove. The groove width of the second annular groove is greater than the maximum linear dimension of the water inlet of the water outlet joint. The water outlet of the water outlet joint is arranged as a threaded hole.

[0010] Further, the water passing plate can be a stepped disc-shaped structure composed of two cylinders with a larger front and a smaller rear. The front sealing groove is located on the front cylinder, and the second annular groove and the rear sealing groove are located on the rear cylinder.

[0011] When the flange, the transition pipe and the water passing plate adopt the first connection method, a retaining ring is preferably fixedly arranged at the front part of the transition pipe. In the installed state, the front end face of the retaining ring of the transition pipe abuts against the rear end face of the flange to realize forward movement limit.

[0012] The rear end part of the transition pipe can be arranged as a stepped structure with a thicker front and a thinner rear. The rear end ring surface of the thicker pipe section is sealed with the front end surface of the water passing plate through a combined gasket.

[0013] A method for improving the cleanliness of the oil passage holes in the rocker arm housing of a shearer mainly uses the oil passage hole smoothness test device for the rocker arm housing of the shearer to conduct a smoothness test on the oil passage holes of the rocker arm housing of the shearer. Specifically, the water inlet joint is installed 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 it is located. A seal is installed in the sealing groove of the water inlet joint. At the same time, the first ring groove of the water inlet joint is communicated with the oil inlet oil passage hole opening in the corresponding shaft hole. The flange platform is detachably fixed on the rocker arm housing of the shearer, and the flange platform is axially positioned by its inner end face; at the installation shaft hole of the transmission shaft communicated with the oil outlet oil passage hole, a water outlet joint is coaxially installed respectively, so that the cylindrical surface of the water passing disc is in clearance fit with the installation shaft hole of the transmission shaft where it is located. Seals are installed in the front and rear sealing grooves. At the same time, the second ring groove is communicated with the corresponding oil outlet oil passage hole. The flange plate is installed in the flange plate installation hole of the bearing seat coaxially opposite to the installation shaft hole of the transmission shaft on the shearer housing, and the transition pipe is located in the inner cavity of the rocker arm housing; keep the water outlet of the water outlet joint corresponding to the oil outlet oil passage hole to be measured in an open state, block the water outlets of the other water outlet joints with the plugs, continuously pass high-pressure water through the water inlet of the water inlet joint for a smoothness test, and at the same time flush the entire oil passage branch where the oil outlet oil passage hole to be measured is located.

[0014] During the processing of the rocker arm housing, the welding of the oil tank cover plate adopts a segmented welding method. The processing sequence is to first clean the oil tank, then weld most of the oil tank cover plates, only leaving a section of the oil tank cover plate facing the oil passage hole unwelded, then perform semi-finishing and finishing of the rocker arm housing, then process the oil passage hole and clean the processed oil passage hole by using a magnetic bar to suck, and finally weld the section of the oil tank cover plate facing the oil passage hole.

[0015] Further, before processing the oil passage hole, weld a partition plate at each end of the welding position of the section of the oil tank cover plate facing the oil passage hole to block the welded part of the oil tank. After the oil passage hole is processed, cut off the partition plate and then weld the section of the oil tank cover plate facing the oil passage hole.

[0016] The beneficial effects of the present invention are:

[0017] The test device of the present invention can be used to realize the smoothness test after the processing of the rocker arm housing of the shearer, check the smoothness of the entire oil circuit of the forced lubrication system mainly composed of oil passage holes, and also check the processing technology control level of the rocker arm housing from one aspect.

[0018] Since the process of conducting the passability test is also the process of cleaning the oil passage holes, avoiding the residue of iron filings and welding slag, the cleanliness of the oil passage holes is improved, ensuring that the forced lubrication system and the rocker arm transmission mechanism operate in a cleaner environment, reducing the failure rate of the forced lubrication system and the rocker arm transmission mechanism, and increasing their service life. Description of the Drawings

[0019] Figure 1 Schematic structural diagram of an embodiment of the water inlet joint;

[0020] Figure 2 Schematic structural diagram of an embodiment of the water outlet joint;

[0021] Figure 3 For Figure 2 Schematic structural diagram of the water passing plate described in

[0022] Figure 4 Schematic structural diagram of another embodiment of the water outlet joint;

[0023] Figure 5 For Figure 1 Schematic installation diagram of the water inlet joint shown on the rocker arm housing of the shearer;

[0024] Figure 6 For Figure 2 Schematic installation diagram of the water outlet joint shown on the rocker arm housing of the shearer;

[0025] Figure 7 Schematic diagram of oil passage hole processing.

[0026] Reference Signs:

[0027] 1. Water inlet joint; 1-1. Longitudinal water passage hole; 1-11. Water inlet; 1-2. Transverse water passage hole; 1-21. Water outlet; 1-3. Sealing groove; 1-4. First ring groove; 2. Water outlet joint; 2-1. Transverse through hole; 2-11. Water inlet; 2-2. Longitudinal through hole; 2-21. Water outlet; 2-3. Flange; 2-4. Transition pipe; 2-41. Retaining ring; 2-5. Water passing plate; 2-51. Front sealing groove; 2-52. Rear sealing groove; 2-6. Second ring groove; 3. Rocker arm housing; 3-1. Oil groove; 3-2. Inlet oil passage hole; 3-3. Outlet oil passage hole; 3-4. Inner cavity; 4. Oil groove cover plate; 5. Partition plate. Detailed Embodiments

[0028] The present invention discloses a passability test device for the oil passage holes of a shearer rocker arm housing (which can be abbreviated as the oil passage hole passability test device), as shown in Figures 1-4, as shown in Figures 7, it includes a water inlet joint 1, a water outlet joint 2 and a plug. The water inlet joint 1 is a rotary part, and its interior is provided with a longitudinally communicating water passage hole 1-1 and a laterally communicating water passage hole 1-2. The openings of the longitudinally communicating water passage hole and the laterally communicating water passage hole on the surface of the water inlet joint are respectively a water inlet 1-11 and a water outlet 1-21, and the two are respectively located at one end face and the cylindrical surface of the water inlet joint. The water outlet joint 2 includes a first disc-shaped part and a second disc-shaped part at both ends and a rod-shaped part connected between the two disc-shaped parts. A laterally communicating through hole 2-1 is provided in the first disc-shaped part, which is sequentially communicated with a longitudinally communicating through hole 2-2 passing through the rod-shaped part and the second disc-shaped part. The openings of the laterally communicating through hole and the longitudinally communicating through hole on the surface of the water outlet joint are respectively a water inlet 2-11 and a water outlet 2-21, and the two are respectively located on the cylindrical surface of the first disc-shaped part and the outer end face of the second disc-shaped part.

[0029] One end of the water inlet joint is provided with a flange platform. The water inlet 1-11 of the water inlet joint is opened on the outer end face provided with the flange platform. On the cylindrical surface of the water inlet joint, on both sides of the axial direction of the water outlet 1-21 of the water inlet joint, a sealing groove 1-3 is respectively provided, and a sealing member can be installed in the sealing groove in a matching manner. The annular surface at the other end of the flange platform serves as the axial positioning surface when the water inlet joint is installed.

[0030] On the cylindrical surface of the water inlet joint, a first annular groove 1-4 is provided between the two sealing grooves. The water outlet of the water inlet joint is located on the groove bottom surface of the first annular groove. The groove width of the first annular groove is greater than the maximum linear dimension of the water outlet 1-21 of the water inlet joint. When the laterally communicating water passage hole is a circular hole, the maximum linear dimension of the water outlet of the water inlet joint is the diameter of the laterally communicating water passage hole. The diameter of the laterally communicating water passage hole is preferably equal to the diameter of the oil inlet passage hole communicating with the lubricating pump installation shaft hole on the shearer rocker arm housing and the oil groove. A plurality of laterally communicating water passage holes can be provided at intervals along the radial direction of the water inlet joint to increase the flow rate, and correspondingly, the water outlets of the water inlet joint are also multiple.

[0031] The water inlet of the water inlet joint is set as a threaded hole to facilitate the connection of the test water inlet pipe.

[0032] The water outlet joint includes a flange plate 2-3, a transition pipe 2-4 and a water passing plate 2-5, and the three are sequentially connected in the installation state. The water passing plate and the flange plate respectively serve as most or all of the first disc-shaped part and the second disc-shaped part, and most or all of the transition pipe serves as the rod-shaped part.

[0033] The flange plate, the transition pipe and the water passing plate can adopt connection method one, such as Figure 2 , 3As shown: The front end of the transition pipe passes through the flange plate to achieve plug connection with the flange plate, and a detachable anti-rotation structure is provided between the two. The rear end of the transition pipe is threadedly connected to the water passing plate, and a sealing treatment is performed between the transition pipe and the water passing plate. The transverse through hole 2-1 is located in the water passing plate and preferably extends along the radial direction of the water passing plate. An axial through hole is also provided in the water passing plate, and the axial through hole is communicated with the through hole axially penetrating the transition pipe, and the two are combined to form the longitudinal through hole. The axial through hole is communicated with the transverse through hole in the water passing plate.

[0034] The flange plate, the transition pipe and the water passing plate can also adopt connection method two, such as Figure 4 As shown: The flange plate, the transition pipe and the water passing plate are butt-jointed and sealed and welded in sequence. The transverse through hole 2-1 is located in the water passing plate. An axial through hole is also provided in the water passing plate. The axial through hole is communicated with the through holes axially penetrating the transition pipe and the flange plate in sequence, and the three are combined to form the longitudinal through hole 2-2. The axial through hole is communicated with the transverse through hole in the water passing plate.

[0035] On the outer cylindrical surface of the water passing plate 2-5, a front sealing groove 2-51 and a rear sealing groove 2-52 are also provided. A second annular groove 2-6 is provided between the front and rear sealing grooves. The water inlet of the water outlet joint is located on the bottom surface of the second annular groove. The groove width of the second annular groove is greater than the maximum linear dimension of the water inlet of the water outlet joint. Similar to the water inlet joint, 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 joint is the diameter of the transverse through hole. The water outlet of the water outlet joint is preferably provided as a threaded hole to facilitate the connection of a plug.

[0036] The diameter of the transverse through hole is preferably equal to the diameter of the oil outlet channel hole on the shearer rocker arm housing that communicates with the installation shaft holes of each transmission shaft. The transverse through holes can be arranged at intervals along the radial direction of the water passing plate to increase the flow rate. Correspondingly, the water inlets of the water outlet joints are also multiple.

[0037] The water passing plate can be a stepped disk-shaped structure composed of two cylinders with a larger front and a smaller rear, such as Figure 2 、 3 As shown. In this case, the front sealing groove is located on the front cylinder, and the second annular groove and the rear sealing groove are located on the rear cylinder.

[0038] When the flange plate, the transition pipe and the water passing plate adopt connection method one, a retaining ring 2-41 is preferably fixedly provided at the front part of the transition pipe. In the installed state, the front end face of the retaining ring of the transition pipe abuts against the rear end face of the flange plate to realize the forward movement limit of the transition pipe. After the flange plate is fixed, the presence of the retaining ring can prevent the safety accident that the high-pressure water sprays out the water outlet joint from the front due to the formation of a pressure difference between the two when the two seals at the front and rear of the water passing plate are damaged during the test.

[0039] The rear end portion of the transition pipe is arranged in a stepped structure that is thick at the front and thin at the rear. The thinner pipe section is connected to the water passing tray by threading, and the rear end annular surface of the thicker pipe section and the front end surface of the water passing tray can be sealed by a combined gasket. The area around the mouth of the axial through hole on the front end surface of the water passing tray is preferably countersunk to improve the sealing effect.

[0040] A pair of parallel planes are provided on the front end cylindrical surface of the transition pipe to facilitate operations such as clamping when using tools for the installation and disassembly of the water outlet joint. The remaining cylindrical surface is used for the radial positioning between the transition pipe and the flange.

[0041] During installation, the flange is fixed to the shearer rocker arm housing. In this embodiment, the flange is a rectangular disk-shaped part.

[0042] The present invention also discloses a method for improving the cleanliness of the oil passage holes in the shearer rocker arm housing, which is mainly achieved by performing an oil passage hole smoothness test on the shearer rocker arm housing 3 using the oil passage hole smoothness test device for the shearer rocker arm housing. The side wall of the shearer rocker arm housing is provided with mounting shaft holes for each transmission shaft of the rocker arm drive system, and also provided with a high-speed lubrication pump mounting shaft hole and / or a low-speed lubrication pump mounting shaft hole. The interior of the shearer rocker arm housing is provided with an oil sump 3-1, an oil inlet passage hole 3-2 (which can be abbreviated as an oil inlet hole) and an oil outlet passage hole 3-3 (which can be abbreviated as an oil outlet hole). Among them, the high-speed lubrication pump mounting shaft hole and the low-speed lubrication pump mounting shaft hole are respectively communicated with the oil sump through their respective corresponding oil inlet holes, and some or all of the transmission shaft mounting shaft holes are respectively communicated with the oil sump through their respective corresponding oil outlet holes.

[0043] First, the water inlet joint and the water outlet joint need to be installed, such as Figure 5 、 6As shown in the figure, install the water inlet joint 1 in the high-speed lubrication pump installation shaft hole and / or the low-speed lubrication pump installation shaft hole, so that the cylindrical surface of the water inlet joint is in clearance fit with the high-speed lubrication pump installation shaft hole or the low-speed lubrication pump installation shaft hole where it is located. Install a seal in the seal groove of the water inlet joint. At the same time, make the first ring groove of the water inlet joint communicate with the oil inlet hole opening in the corresponding shaft hole. Fix the flange platform detachably on the shearer rocker arm housing, and axially position the flange platform by using its inner end face. Install one of the water outlet joints coaxially at the transmission shaft installation shaft hole communicating with the oil outlet hole, so that the cylindrical surface of the water passing plate is in clearance fit with the transmission shaft installation shaft hole where it is located. Install seals in the front and rear seal grooves. At the same time, make the second ring groove communicate with the corresponding oil outlet hole. Install the flange plate in the flange plate installation hole of the bearing seat arranged coaxially opposite to the transmission shaft installation shaft hole on the shearer housing. The transition pipe is located in the inner cavity 3-4 of the rocker arm housing. The unilateral clearance at the above clearance fit is preferably 0.1 mm, which can effectively prevent scratches on the corresponding shaft holes of the rocker arm housing when installing and disassembling the test device.

[0044] Keep the water outlet of the water outlet joint corresponding to the oil outlet to be measured open, block the water outlets of the other water outlet joints with the plugs, continuously supply high-pressure water to the water inlet of the water inlet joint for 3 minutes for the through-flow test, and at the same time flush the entire oil passage branch where the oil outlet to be measured is located.

[0045] Take the undivided cavity seven-axis rocker arm with both a high-speed lubrication system and a low-speed lubrication system configured and an oil outlet hole communicating with the shaft hole of each transmission shaft as an example. When the shearer is mining uphill, there is a lack of lubricating oil near the seven-axis. At this time, the high-speed lubrication pump comes into play. The high-speed lubrication pump sucks the oil in the inner cavity 3-4 of the rocker arm housing near the first axis, and then pumps it to the straight tooth sections of the fifth, sixth, and seventh axes through the high-speed lubrication pump installation shaft hole, the oil inlet hole communicating with it, the oil groove, and the oil outlet holes respectively communicating with the fifth to seventh axis installation shaft holes. The high-speed lubrication pump and the corresponding oil passages constitute the high-speed lubrication system. Similarly, when the shearer is mining downhill, there is a lack of lubricating oil near the first axis. At this time, the low-speed lubrication pump comes into play. The low-speed lubrication pump sucks the oil in the inner cavity 3-4 of the rocker arm housing near the seventh axis, and then pumps it to the straight tooth sections of the first, second, third, and fourth axes through the low-speed lubrication pump installation shaft hole, the oil inlet hole communicating with it, the oil groove, and the oil outlet holes respectively communicating with the first to fourth axis installation shaft holes. The low-speed lubrication pump and the corresponding oil passages constitute the low-speed lubrication system.

[0046] According to the above example, when conducting a through - flow test on the oil passage holes of the high - speed lubrication system, the water inlet joint should be installed at the installation shaft hole of the high - speed lubrication pump, so that the oil inlet hole at the installation shaft hole of the high - speed lubrication pump communicates with the first annular groove. Install a water outlet joint at the installation shaft holes of the fifth, sixth, and seventh axes respectively, and make the oil outlet holes at the corresponding shaft holes communicate with the second annular groove on the corresponding water outlet joint, so as to form a complete test water path: "the water inlet of the water inlet joint - the water outlet of the water inlet joint - the first annular groove - the oil inlet hole - the oil groove - the oil outlet hole communicating with the installation shaft holes of the fifth, sixth, and seventh axes - the second annular groove - the water inlet of the water outlet joint - the water outlet of the water outlet joint". When conducting a through - flow test on the oil passage holes of the low - speed lubrication system, the water inlet joint should be installed at the installation shaft hole of the low - speed lubrication pump, so that the oil inlet hole at the installation shaft hole of the low - speed lubrication pump communicates with the first annular groove. Install a water outlet joint at the installation shaft holes of the first, second, third, and fourth axes respectively, and make the oil outlet holes at the corresponding shaft holes communicate with the second annular groove on the corresponding water outlet joint, so as to form a complete test water path: "the water inlet of the water inlet joint - the water outlet of the water inlet joint - the first annular groove - the oil inlet hole - the oil groove - the oil outlet hole communicating with the installation shaft holes of the first, second, third, and fourth axes - the second annular groove - the water inlet of the water outlet joint - the water outlet of the water outlet joint".

[0047] Each time a through - flow test is conducted on the oil passage branch corresponding to the installation shaft hole of a transmission shaft, only keep the water outlet of the water outlet joint in this installation shaft hole of the transmission shaft in an open state, and the water outlets of the water outlet joints in the installation shaft holes of the remaining transmission shafts are blocked by screw plugs. Inject high - pressure water from the water inlet of the water inlet joint, keep the water flowing for 3 minutes, and check the through - flow. Then block the water outlet of this water outlet joint, and change the water outlet of other water outlet joints to an open state, and conduct the test one by one like this.

[0048] During the test process, if there are residual iron filings and welding slag in the oil inlet hole and the oil outlet hole, they will also be washed out by the high - pressure water. Therefore, while checking the through - flow of the oil passage holes, it also plays a role in cleaning the oil passage holes.

[0049] In addition, as Figure 7 shown, when machining the rocker arm housing, the welding of the oil groove cover plate 4 is preferably carried out in a segmented welding method. The processing sequence is to first clean the oil groove, then weld most of the oil groove cover plate, only keep a section of the oil groove cover plate facing the oil passage hole unwelded, then carry out semi - finishing and finishing of the rocker arm housing, then machine the oil passage hole and clean the machined oil passage hole by using a magnetic bar to absorb. Finally, weld the section of the oil groove cover plate facing the oil passage hole. Compared with the traditional processing technology of machining the oil passage hole first and then welding the oil groove cover plate, only the oil passage hole and a section of the oil groove facing it need to be cleaned to ensure its cleanliness, and basically the cleanliness of the entire oil passage of the forced lubrication system can be ensured.

[0050] Further, before machining the oil passage hole, two partitions 5 may be welded to both ends of the welding position of a section of the oil tank cover plate facing the oil passage hole to block the already welded part of the oil tank. After the oil passage hole is machined, the partitions are cut off, and then a section of the oil tank cover plate facing the oil passage hole is welded. This method can prevent iron filings generated during the machining of the oil passage hole from entering the oil passage hole, providing a basic guarantee for improving the cleanliness of the oil passage hole.

[0051] The front and back mentioned in this article are for the need to express the relative position relationship and do not limit the absolute orientation.

Claims

1. A test device for the smoothness of the oil passage holes in the rocker arm housing of a shearer, characterized in that: It includes a water inlet joint, a water outlet joint and a plug. The water inlet joint is a rotating part, and there are longitudinally communicating water holes and laterally communicating water holes inside it. The openings of the longitudinally communicating water hole and the laterally communicating water hole on the surface of the water inlet joint are the water inlet and the water outlet respectively, and they are located at one end face and the cylindrical surface of the water inlet joint respectively. One end of the water inlet joint is provided with a flange platform, and the water inlet of the water inlet joint is opened on the outer end face with the flange platform. On the cylindrical surface of the water inlet joint, there is a sealing groove on each side of the axial direction of the water outlet of the water inlet joint. On the cylindrical surface of the water inlet joint, there is a first annular groove between the two sealing grooves. The water outlet of the water inlet joint is located on the bottom surface of the first annular groove, and the width of the first annular groove is greater than the maximum linear dimension of the water outlet of the water inlet joint; The water outlet joint includes a first disc-shaped part and a second disc-shaped part at both ends and a rod-shaped part connected between the two disc-shaped parts. There is a laterally communicating through hole in the first disc-shaped part, which is sequentially communicated with the longitudinally communicating through hole passing through the rod-shaped part and the second disc-shaped part. The openings of the laterally communicating through hole and the longitudinally communicating through hole on the surface of the water outlet joint are the water inlet and the water outlet respectively, and they are located on the cylindrical surface of the first disc-shaped part and the outer end face of the second disc-shaped part respectively. The water outlet joint includes a flange plate, a transition pipe and a water passing disc. In the installed state, the three are connected in sequence. The water passing disc and the flange plate respectively act as most or all of the first disc-shaped part and the second disc-shaped part, and most or all of the transition pipe acts as the rod-shaped part. The first connection method is: the front end of the transition pipe is inserted into the flange plate, and there is a detachable anti-rotation structure between them. The rear end of the transition pipe is threadedly connected into the water passing disc, and a sealing treatment is made between the transition pipe and the water passing disc. The laterally communicating through hole is located in the water passing disc. There is also an axially communicating through hole in the water passing disc, and the axially communicating through hole is connected to the through hole axially passing through the transition pipe, and the two are combined into the longitudinally communicating through hole. The axially communicating through hole is communicated with the laterally communicating through hole in the water passing disc; The second connection method is: the flange plate, the transition pipe and the water passing disc are butt-jointed and sealed and welded in sequence. The laterally communicating through hole is located in the water passing disc. There is also an axially communicating through hole in the water passing disc, and the axially communicating through hole is sequentially communicated with the through holes axially passing through the transition pipe and the flange plate, and the three are combined into the longitudinally communicating through hole. The axially communicating through hole is communicated with the laterally communicating through hole in the water passing disc. There is a front sealing groove and a rear sealing groove on the cylindrical surface of the water passing disc. There is a second annular groove between the front and rear sealing grooves. The water inlet of the water outlet joint is located on the bottom surface of the second annular groove, and the width of the second annular groove is greater than the maximum linear dimension of the water inlet of the water outlet joint. The water outlet of the water outlet joint is set as a threaded hole; When in use, the water inlet joint is used to be installed in the installation shaft hole of the high-speed lubricating pump and / or the installation shaft hole of the low-speed lubricating pump, so that the cylindrical surface of the water inlet joint is in clearance fit with the installation shaft hole of the high-speed lubricating pump or the low-speed lubricating pump where it is located. The water outlet joint is used to be coaxially installed at each drive shaft installation shaft hole communicated with the oil outlet oil passage hole, so that the cylindrical surface of the water passing disc is in clearance fit with the drive shaft installation shaft hole where it is located.

2. The oil passage hole smoothness test device for the shearer rocker arm housing according to claim 1, characterized in that: The water inlet of the water inlet joint is configured as a threaded hole.

3. The test device for the oil passage hole patency of the shearer rocker arm housing according to claim 1 or 2, characterized in that: The water passing tray is a stepped tray-like structure composed of two cylinders with a larger front part and a smaller rear part. The front sealing groove is located on the front cylinder, and the second ring groove and the rear sealing groove are located on the rear cylinder.

4. The oil passage hole smoothness test device for the shearer rocker arm housing according to claim 3, characterized in that: When the flange, the transition pipe and the water passing tray adopt connection method one, a retaining ring is fixedly arranged at the front part of the transition pipe. In the installed state, the transition pipe is limited in forward movement by making the front end face of the retaining ring abut against the rear end face of the flange.

5. The coal shearer rocker arm housing oil passage hole patency test device according to claim 4, characterized in that: The rear end part of the transition pipe is configured as a stepped structure with a thicker front part and a thinner rear part. The rear end annular surface of the thicker pipe section is sealed with the front end face of the water passing tray through a combined gasket.

6. A method for improving the cleanliness of the oil passage holes in the rocker arm housing of a shearer, characterized in that: Use the coal shearer rocker arm housing oil passage hole patency test device described in claims 1, 2, 3, 4 or 5 to conduct a patency test on the oil passage holes of the coal shearer rocker arm housing. Specifically, install the water inlet joint in the high-speed lubricating pump installation shaft hole and / or the low-speed lubricating pump installation shaft hole, make the cylindrical surface of the water inlet joint fit with the clearance of the high-speed lubricating pump installation shaft hole or the low-speed lubricating pump installation shaft hole where it is located, install a seal in the sealing groove of the water inlet joint, and at the same time make the first ring groove of the water inlet joint communicate with the oil inlet oil passage hole opening in the corresponding shaft hole. Fix the flange platform detachably on the coal shearer rocker arm housing, and axially position the flange platform by using its inner end face; coaxially install a water outlet joint at each of the transmission shaft installation shaft holes communicating with the oil outlet oil passage hole, make the cylindrical surface of the water passing tray fit with the clearance of the transmission shaft installation shaft hole where it is located, install seals in the front and rear sealing grooves, and at the same time make the second ring groove communicate with the corresponding oil outlet oil passage hole. Install the flange in the flange installation hole of the bearing seat arranged coaxially opposite to the transmission shaft installation shaft hole on the coal shearer housing, and the transition pipe is located in the inner cavity of the rocker arm housing; keep the water outlet of the water outlet joint corresponding to the oil outlet oil passage hole to be measured in an open state, block the water outlets of the remaining water outlet joints with the plugs, continuously pass high-pressure water into the water inlet of the water inlet joint for the patency test, and at the same time flush the entire oil passage branch where the oil outlet oil passage hole to be measured is located.

7. The method for improving the cleanliness of the oil passage holes in the rocker arm housing of a shearer according to claim 6, characterized in that: During the processing of the rocker arm housing, the oil tank cover plate is welded by a segmented welding method. The processing sequence is to first clean the oil tank, then weld most of the oil tank cover plates, only leaving a section of the oil tank cover plate opposite to the oil passage hole unwelded, then perform semi-finishing and finishing of the rocker arm housing, then process the oil passage holes and clean the processed oil passage holes by using a magnetic bar to absorb, and finally weld the section of the oil tank cover plate opposite to the oil passage hole.

8. The method for improving the cleanliness of the oil passage holes in the rocker arm housing of a shearer according to claim 7, characterized in that: Before processing the oil passage holes, weld a partition plate at each end of the welding position of the section of the oil tank cover plate opposite to the oil passage hole to block the already welded part of the oil tank. After the oil passage holes are processed, cut off the partition plates and then weld the section of the oil tank cover plate opposite to the oil passage hole.

Images