A cutting retarder internal spray system

Abstract

The present application belongs to the technical field of cutting internal spraying device, and particularly relates to a cutting reducer internal spraying system; the internal spraying system is compatible with the left-right symmetrical structure of the cutting reducer; the cutting reducer adopts symmetrical double main transmission shafts for power transmission; the middle inner gear ring on the two side main transmission shafts is engaged with the planetary gear on the planetary carrier, the planetary carrier is stationary, and the two side main transmission shafts are synchronized through the planetary gear and the inner gear ring; the center of the main transmission shaft is provided with a first channel, the input channel of the internal spraying system is located in the intermediate arm of the reducer, the input channel is communicated with the first channels of the two side main transmission shafts through the bidirectional channel in the planetary carrier, the outlet of the first channel is provided with a flow splitting mechanism, the first outlet of the flow splitting mechanism is connected with the cutting reducer side drum cooling water input channel, and the second outlet is connected with the cutting reducer intermediate drum cooling water input channel; the sealing of the internal spraying system in the present application is all small-diameter sealing, which is high in reliability and not easy to be damaged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of cutting internal spraying device, and particularly relates to a cutting internal spraying system of a cutting reducer. BACKGROUND

[0002] A continuous miner is a main coal mining equipment for tunneling in a coal mine, and an internal spraying system of a cutting reducer, which is one of important parts of the continuous miner, sprays cooling water from nozzles at the middle and both sides of a cutting drum through internal pipelines of the cutting reducer to reduce dust concentration around, reduce cutting wear and avoid cutting sparks. After development in recent years, the internal spraying system of the cutting reducer has been simply developed, but it complicates the structure of the cutting reducer to some extent, increases processing difficulty and cost.

[0003] At present, methods adopted by many coal mining equipment manufacturers are to drill holes in the inside of a reducer shell to achieve the purpose of transmitting cooling water, but the process has the following deficiencies: (1) the cutting reducer shell itself has a high complexity, is difficult to process and has a high cost, and further processing of multiple deep holes in the reducer shell not only increases the complexity of the shell but also increases manufacturing cost; (2) once the channel is blocked, it is difficult to maintain and cannot achieve the expected use effect; (3) the transmission of cooling water from the shell has a large water sealing diameter, and the cutting reducer is applied to a strong impact and vibration environment, which greatly wears the seal, and once the seal is damaged, not only the performance of the spraying system is reduced, but also the normal use of the entire reducer is affected, which has great safety hazards. SUMMARY

[0004] The present application is to solve the problems of high processing cost and difficult maintenance of the current internal spraying system of the cutting reducer.

[0005] The present application provides the following technical scheme: an internal spraying system of a cutting reducer, which is compatible with the left-right symmetrical structure of the cutting reducer; the cutting reducer adopts symmetrical double main transmission shafts for power transmission, and the main transmission shafts at both sides are connected through an intermediate planetary part;

[0006] The planetary carrier of the intermediate planetary part is coaxial with the main transmission shafts at both sides but has no torque change, the middle inner gear ring on the main transmission shafts at both sides is engaged with the planetary gear on the planetary carrier, the planetary carrier is stationary, and the main transmission shafts at both sides are synchronized through the planetary gear and the inner gear ring;

[0007] A first channel is provided through the center of the main transmission shaft, an input channel of the internal spraying system is located in the middle arm of the reducer, the input channel is communicated with the first channels of the main transmission shafts at both sides through a bidirectional channel in the planetary carrier, a shunt mechanism is arranged at the outlet of the first channel, a first outlet of the shunt mechanism is connected with a side drum cooling water input channel of the cutting reducer, and a second outlet is connected with a middle drum cooling water input channel of the cutting reducer.

[0008] Further, the shaft hole of the main transmission shaft is provided with two separate concentric pipes, the center of the inner pipe is the first channel, one end of the inner pipe is sealingly connected with the planet carrier and the other end is sealingly connected with the inlet of the flow distribution mechanism; one end of the outer pipe is sealingly connected with the hole wall of the shaft hole and the other end is sealingly connected with the second outlet of the flow distribution mechanism, the gap between the outer pipe and the hole wall of the shaft hole is the second channel; the outer pipe rotates with the main transmission shaft and the inner pipe is static; the second channel is communicated with the intermediate roller cooling water input channel of the cutting reducer through a connecting shaft, one end of the connecting shaft is sealingly connected with the intermediate roller of the cutting reducer and the other end is sealingly connected with the hole of the main transmission shaft which is through the shaft hole.

[0009] Further, the flow distribution mechanism comprises cover I, cover II and cover III which are arranged in sequence, and the center holes of the cover I, cover II and cover III are aligned;

[0010] The center hole of the cover I is sealingly connected with the outer pipe, the outer ring of the cover I is sealingly connected with the shaft hole of the main transmission shaft, and the cover I blocks the second channel;

[0011] The center hole of the cover II is sealingly connected with the inner pipe, and the third channel which is communicated with the second channel from the center hole of the cover III is arranged between the cover I, cover II and cover III; the cover I, cover II and cover III are assembled together through screws, the screw holes are staggered with the third channel; the flow distribution mechanism is assembled at the end of the main transmission shaft through the cover IV; the center holes of the cover III and cover IV are sealingly connected, and the cutting reducer side roller cooling water input channel is connected with the center hole of the cover IV.

[0012] Further, the end surface of the cover II close to the cover I is provided with a sink and embedded with a seal VI, and the cover I protrudes a stop ring which presses the seal VI to limit the axial movement of the seal VI.

[0013] Further, the inner pipe is connected with the planet carrier through an inner channel assembly, the center of the inner channel assembly is a stepped through hole, and the outer ring is a stepped shaft, the inner pipe is inserted into the bottom of the stepped through hole, and the stepped shaft is inserted into the hole of the planet carrier and the shaft shoulder is stopped around the hole;

[0014] The outer pipe is connected with the main transmission shaft through an outer channel assembly, the outer channel assembly does not contact the inner pipe, the center of the outer channel assembly is a stepped through hole, and the outer ring is a stepped shaft, the outer pipe is inserted into the bottom of the stepped through hole, the stepped shaft is inserted into the shaft hole, and the shaft shoulder is stopped on the supporting shoulder in the shaft hole.

[0015] Further, the protruding shaft on the planet carrier is inserted into the stepped hole in the end surface of the main transmission shaft, a water seal is arranged between the protruding shaft and the first stepped hole, and the protruding shaft is sleeved with the second stepped hole.

[0016] Further, the planet carrier comprises two identical halves, the two halves are combined by screws, and the bidirectional channel is drilled from the joint surface of the two halves.

[0017] Compared with the prior art, the application has the advantages of:

[0018] The internal spraying system of the cutting reducer provided by the application overcomes the technical defects of the internal spraying device of the existing tunneling machine and coal mining machine, improves the reliability and service life of the internal spraying device of the continuous coal mining machine, reduces the size of the water seal, reduces the use cost and failure rate, adopts a planetary transmission to transfer torque in the middle of the main transmission shaft, halves the length of the single main transmission shaft, reduces the machining difficulty of the main transmission shaft, and reduces the machining cost, the cooling water is divided by three cover combinations at the passage A3, the machining difficulty of the parts is reduced to the greatest extent, the sealing diameter is reduced, and the reliability of the internal spraying system is ensured.

[0019] The internal spraying system in the application is designed with small-diameter seals, has high reliability and is not easy to be damaged.

[0020] The internal spraying system in the application has low machining difficulty of parts, realizes the connection of the cooling water passages through simple small-size parts, has low machining cost and simple maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The figure is a structural schematic diagram of the application;

[0022] Figure 2 The figure is a schematic diagram of the connection between the inner tube and the planet carrier and the connection between the outer tube and the main transmission shaft;

[0023] Figure 3 The figure is a schematic diagram of the connection between the second passage and the cooling water input passage of the intermediate drum of the cutting reducer;

[0024] Figure 4 The figure is a schematic diagram of the structure of the flow dividing mechanism;

[0025] Figure 5 The figure is a schematic diagram of the structure of the cover I;

[0026] Figure 6 The figure is a schematic diagram of the structure of the cover III;

[0027] In the diagram: 1-Intermediate pipeline of the spray system inside the reducer; 2-Middle support of the internal spray system; 3-Intermediate internal gear ring; 4-Bearing housing; 5-Planetary carrier; 6-Planetary gear; 7-Bearing; 8-Planetary shaft; 9-Screw; 10-Intermediate roller of the cutting reducer; 11-Seal I; 12-Screw; 13-Bearing II; 14-Water seal; 15-Seal III; 16-Inner channel assembly; 17-Outer channel assembly; 18-Seal IV; 19-Seal V; 20-Cap II; 21-Screw; 22-Cap I; 23-Seal VI; 24-Cap III; 25-Cap IV; 26-Screw; 27-Connecting shaft; 28-Main drive shaft; 29-Side roller of the cutting reducer; A1-Input channel; A2-Bidirectional channel; A3-First channel; B1-Third channel; B2-Second channel; C1-Fourth channel. Detailed Implementation

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] like Figure 1 As shown: A spray system inside a cutting reducer is compatible with the left and right symmetrical structure of the cutting reducer; the cutting reducer uses symmetrical dual main drive shafts for power transmission, and the two main drive shafts 28 on both sides are connected by a central planetary section; the two separate main drive shafts 28 are synchronized through the central planetary section, and the length of a single main drive shaft inside the cutting reducer is halved, which is more conducive to manufacturing and processing.

[0030] The planet carrier 5 in the middle planetary section is coaxial with the main drive shafts 28 on both sides but there is no torque change. That is, the planet carrier 5 remains stationary when the main drive shafts 28 rotate. The planet carrier 5 is connected to the middle support 2 of the inner spray system. The middle internal gear ring 3 on the main drive shafts 28 on both sides meshes with the planet gear 6 on the planet carrier 5. The planet carrier 5 is stationary. The synchronization of the main drive shafts 28 on both sides is achieved through the planet gear 6 and the internal gear ring 3.

[0031] Bearing 7 is mounted on planetary shaft 8 to support planetary gear 6. Planetary shaft 8 is mounted on planetary carrier 5. Planetary gear 6 meshes with internal gear ring 3 (left and right parts) to complete the power transmission.

[0032] The center of the main drive shaft 28 is provided with a through first channel A3. The input channel A1 of the internal spray system is located inside the intermediate arm 1 of the reducer. The input channel A1 is connected to the first channel A3 of the two main drive shafts through the bidirectional channel A2 in the planetary carrier 5. The outlet of the first channel A3 is provided with a diversion mechanism. The first outlet of the diversion mechanism is connected to the cooling water input channel of the side drum of the cutting reducer, and the second outlet is connected to the cooling water input channel of the intermediate drum of the cutting reducer.

[0033] like Figure 3 As shown: The main drive shaft 28 has two separate concentric tubes installed in its shaft center channel. The center of the inner tube is the first channel A3. One end of the inner tube is sealed to the planetary carrier 5, and the other end is sealed to the inlet of the diverter mechanism. One end of the outer tube is sealed to the wall of the shaft center channel, and the other end is sealed to the second outlet of the diverter mechanism. The gap between the outer tube and the wall of the shaft center channel is the second channel B2. The outer tube rotates with the main drive shaft 28, while the inner tube remains stationary. The second channel B2 is connected to the cooling water input channel of the intermediate drum of the cutting reducer through the connecting shaft 27. The fourth channel C1 in the connecting shaft 27 connects the second channel B2 to the cooling water input channel of the intermediate drum of the cutting reducer. One end of the connecting shaft 27 is sealed to the intermediate drum of the cutting reducer, and the other end is sealed to the hole in the main drive shaft 28 that is connected to the shaft center channel.

[0034] like Figure 4 , Figure 5 , Figure 6 As shown: The diversion mechanism includes a sealing cap I22, a sealing cap II20 and a sealing cap III24 arranged in sequence, with the center holes of the sealing caps I22, II20 and III24 aligned.

[0035] The center hole of the cover I22 is sealed to the outer tube, and the outer ring of the cover I22 is sealed to the shaft center hole of the main drive shaft 28. The outer ring of the cover I22 and the shaft center hole are sealed by the seal V19. The seal V19 is installed in the groove of the outer ring of the cover I22, and the cover I22 blocks the second channel B2.

[0036] The center hole of cover II20 is sealed to the inner tube. A third channel B1 is provided between cover I22, cover II20 and cover III24, which connects to the second channel B2 from the center hole of cover III24. Cover I22, cover II20 and cover III24 are assembled together by screws 21, and the screw holes are offset from the third channel B1. The diversion mechanism is assembled to the end of the main drive shaft 28 through cover IV25. The center holes of cover III24 and cover IV25 are sealed together, and the cooling water input channel of the cutting reducer side drum is connected to the center hole of cover IV25.

[0037] Both caps I22 and III24 have a central hole, and around the central hole are screw holes and through holes. The through holes of both are aligned to extend the third channel B1.

[0038] Cooling water is diverted at the first channel A3 by combining cover I22, cover II20 and cover III24, which minimizes the processing difficulty of parts, reduces the sealing diameter, and ensures the reliability of the internal spray system.

[0039] The end face of the cover I22, which is close to the cover II20, has a groove and is fitted with a seal VI23. The protruding retaining ring on the cover I22 presses against the seal VI23 to restrict its axial movement.

[0040] The cooling water for the internal spray system enters from the input channel A1, and reaches the branch point of the internal spray system water channel through the bidirectional channel A2 and the first channel A3. The first channel A3 connects to the cooling water input channel of the internal spray system of the cutting reducer side drum, and the third channel B1, the second channel B2, and the fourth channel C1 connect to the cooling water channel of the internal spray system of the intermediate drum, thus completing the connection of the cooling water channel of the internal spray system of the cutting reducer.

[0041] like Figure 2 As shown: The inner tube is connected to the planetary carrier 5 through the inner channel assembly 16. The center of the inner channel assembly 16 is a stepped through hole and the outer ring is a stepped shaft. The inner tube is inserted into the bottom of the stepped through hole, and the stepped shaft is inserted into the hole of the planetary carrier 5. The shaft shoulder stops at the circumference of the hole. The stepped shaft and the planetary carrier 5 are sealed by seal Ⅲ15, which is installed in the groove of the stepped shaft.

[0042] The outer tube is connected to the main drive shaft 28 through the outer channel assembly 17. The outer channel assembly 17 does not contact the inner tube. The center of the outer channel assembly 17 is a stepped through hole and the outer ring is a stepped shaft. The outer tube is inserted into the bottom of the stepped through hole, and the stepped shaft is inserted into the shaft center channel. The shaft shoulder is stopped by the support shoulder in the shaft center channel. The stepped shaft and the main drive shaft 28 are sealed by seal IV18, which is embedded in the groove of the stepped shaft.

[0043] The protruding shaft on the planetary carrier 5 is inserted into the stepped hole on the end face of the main drive shaft 28. A water seal 14 is installed between the protruding shaft and the first-stage stepped hole, and the protruding shaft is fitted into the second-stage stepped hole.

[0044] The planet carrier 5 comprises two identical halves joined by screws, with a bidirectional channel A2 drilled into the mating surfaces of the two halves.

[0045] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A spray system inside a cutting reducer, characterized in that: The internal spray system is compatible with the left and right symmetrical structure of the cutting reducer; the cutting reducer uses symmetrical dual main drive shafts for power transmission, and the two main drive shafts (28) are connected by the middle planetary part; The planet carrier (5) of the middle planetary section is coaxial with the main drive shafts (28) on both sides but there is no torque change. The middle internal gear ring (3) on the main drive shafts (28) on both sides meshes with the planet gear (6) on the planet carrier (5). The planet carrier (5) is stationary. The synchronization of the main drive shafts (28) on both sides is achieved through the planet gear (6) and the internal gear ring (3). The center of the main drive shaft (28) is provided with a through first channel (A3). The input channel (A1) of the internal spray system is located in the intermediate arm (1) of the reducer. The input channel (A1) is connected to the first channel (A3) of the two main drive shafts on both sides through the bidirectional channel (A2) in the planetary carrier (5). The outlet of the first channel (A3) is provided with a diversion mechanism. The first outlet of the diversion mechanism is connected to the cooling water input channel of the side drum of the cutting reducer, and the second outlet is connected to the cooling water input channel of the intermediate drum of the cutting reducer. The main drive shaft (28) has two separate concentric tubes installed in its shaft center channel. The center of the inner tube is the first channel (A3). One end of the inner tube is sealed to the planetary carrier (5), and the other end is sealed to the inlet of the diverter mechanism. One end of the outer tube is sealed to the wall of the shaft center channel, and the other end is sealed to the second outlet of the diverter mechanism. The gap between the outer tube and the wall of the shaft center channel is the second channel (B2). The outer tube rotates with the main drive shaft (28), while the inner tube remains stationary. The second channel (B2) is connected to the cooling water input channel of the intermediate drum of the cutting reducer through the connecting shaft (27). One end of the connecting shaft (27) is sealed to the intermediate drum of the cutting reducer, and the other end is sealed to the hole in the main drive shaft (28) that is connected to the shaft center channel. The diversion mechanism includes a cover I (22), a cover II (20) and a cover III (24) arranged in sequence, with the center holes of the cover I (22), cover II (20) and cover III (24) aligned; The center hole of the cover I (22) is sealed to the outer tube, and the outer ring of the cover I (22) is sealed to the shaft center hole of the main drive shaft (28). The cover I (22) blocks the second channel (B2). The center hole of the cap II (20) is sealed to the inner tube. A third channel (B1) is provided between the cap I (22), the cap II (20) and the cap III (24), which connects to the second channel (B2) from the center hole of the cap III (24). The cap I (22), the cap II (20) and the cap III (24) are assembled together by screws (21), and the screw holes are offset from the third channel (B1). The diversion mechanism is assembled on the end of the main drive shaft (28) through the cover IV (25); the center holes of the cover III (24) and the cover IV (25) are sealed and connected, and the cooling water input channel of the cut-off reducer side drum is connected to the center hole of the cover IV (25).

2. The spray system inside a cutting reducer according to claim 1, characterized in that: The end face of the cover II (20) near the cover I (22) is provided with a groove and is fitted with a seal VI (23). The protruding retaining ring on the cover I (22) presses against the seal VI (23) to restrict its axial movement.

3. The spray system inside a cutting reducer according to claim 1, characterized in that: The inner tube is connected to the planetary carrier (5) through the inner channel assembly (16). The center of the inner channel assembly (16) is a stepped through hole and the outer ring is a stepped shaft. The inner tube is inserted into the bottom of the stepped through hole, and the stepped shaft is inserted into the hole of the planetary carrier (5). The shaft shoulder stops at the circumference of the hole. The outer tube is connected to the main drive shaft (28) through the outer channel assembly (17). The outer channel assembly (17) does not contact the inner tube. The center of the outer channel assembly (17) is a stepped through hole and the outer ring is a stepped shaft. The outer tube is inserted into the bottom of the stepped through hole, the stepped shaft is inserted into the shaft center channel, and the shaft shoulder is stopped by the support shoulder in the shaft center channel.

4. The spray system inside a cutting reducer according to claim 1, characterized in that: The protruding shaft on the planetary carrier (5) is inserted into the stepped hole on the end face of the main drive shaft (28), and a water seal (14) is installed between the protruding shaft and the first-stage stepped hole, and the protruding shaft is fitted with the second-stage stepped hole.

5. The spray system inside a cutting reducer according to claim 1, characterized in that: The planetary carrier (5) comprises two identical halves joined by screws, with a bidirectional channel (A2) drilled into the mating surfaces of the two halves.

Images