A dual-channel parallel stepped seal structure for a high-pressure rotor pump with cooling and heat dissipation capabilities

Abstract

A double-channel parallel stepped sealing structure of a high-pressure rotor pump with cooling and heat dissipation capabilities belongs to the field of sealing of mixed transportation pumps in oil-gas gathering and transportation of oilfield well groups. It includes parts such as a dynamic circulation cooling and heat dissipation channel for shaft sleeve lubricating oil, an external dynamic circulation cooling channel for lubricating oil, an air circulation cooling and heat dissipation and an internal circulation cooling and heat dissipation system for the seal, and a bearing circulation cooling and heat dissipation system, etc.; A double-channel parallel stepped sealing structure of a high-pressure rotor pump with cooling and heat dissipation capabilities improves the processing and installation quality of the sealing structure, blocks the mutual influence between seal heat and bearing temperature rise, establishes a new mode of dynamic flow circulation lubrication and heat dissipation of lubricating oil, realizes strict sealing and long life of the rotor pump under high pressure, and solves the bearing lubrication and heat dissipation problems of high-pressure rotor pumps with high pressure and large displacement.

Description

Technical Field

[0001] The present invention relates to a double-channel parallel stepped seal structure of a high-pressure rotor pump with cooling and heat dissipation capabilities, belonging to the field of seals for mixed transportation pumps in oil-gas gathering and transportation of oilfield well groups. Background Art

[0002] As of 2021, the external dependence of China's oil and natural gas has risen to 72% and 45% respectively, far exceeding the internationally recognized energy security warning line (external dependence of 50%). The contradiction between supply and demand is prominent, seriously threatening national energy security. There is an urgent need to increase the development of domestic oil and gas resources. However, at present, China's oil-gas mixed transportation equipment mainly relies on imports from Germany, with high prices, expensive accessories and difficult maintenance and replacement. Therefore, in order to meet the requirements of efficient and low-cost transportation of oil-gas gathering and transportation in China, break through the bottleneck, and realize the localization of oil-gas mixed transportation equipment, it is urgent to develop a new seal structure for mixed transportation devices.

[0003] Among them, as one of the key equipment for oil-gas gathering and transportation in oilfield well groups, the heat dissipation capacity and sealing effect of the oil mixed transportation pump determine the overall transportation efficiency and working performance of the device. Currently, there are problems: for the traditional seal structure, ① the processing of the seal groove often fails to meet the requirements and is not convenient for inspection, so the quality dimensions of the groove are not guaranteed. The sealing ring installed in the seal groove needs to be heated by a hot installation method and bent and deformed by a press to be embedded in the groove. Therefore, a large pulling force is also required during disassembly. It can be seen that this method is likely to damage the sealing ring during both the assembly and disassembly processes, making the installation and disassembly quite difficult; ② the entire seal structure is tightly closed, and the heat layers affect each other, resulting in the easy destruction of the seal structure. The destruction of the seal structure will not only cause environmental pollution and equipment corrosion, but may even cause fire and explosion, resulting in safety accidents of personnel and equipment and economic losses; ③ seal leakage and damage are also the main reasons for bearing failure. According to statistics, about 40% of bearing damage is related to lubrication. Poor lubrication is likely to cause large bearing wear, and then cause poor operation, vibration and noise, resulting in temperature rise; ④ too high temperature will also cause the bearing to burn out, as well as the unplanned shutdown or load reduction operation of the unit, short service life, increased maintenance costs, and great impact on economic benefits.

[0004] Therefore, in order to meet the requirements of efficient and low-cost transportation of oil-gas gathering and transportation in China, block the mutual influence between seal heat and bearing temperature rise, improve the processing and installation quality of the seal structure and the pump efficiency of the high-pressure rotor pump, avoid problems such as double failure, a new lubricating oil dynamic flow circulation lubrication and heat dissipation model is established to achieve strict sealing and long life of the rotor pump under high pressure, and solve the bearing lubrication and heat dissipation problems of high-pressure rotor pumps with high pressure and large displacement. A double-channel parallel stepped seal structure of a high-pressure rotor pump with cooling and heat dissipation capabilities is designed. Summary of the Invention

[0005] The object of the present invention is to block the mutual influence between the sealed heat and the bearing temperature rise, so that the sealing and bearing systems can achieve good heat dissipation and temperature reduction effects, improve the processing and installation quality of the sealing structure, solve the influence of temperature and sealing performance on the high-pressure rotor pump, and propose a double-channel parallel stepped sealing structure for a high-pressure rotor pump with cooling and heat dissipation capabilities. Through on-site tests, this sealing structure has successfully solved the above problems, improved the processing and installation quality, realized strict sealing, and also realized the cooling cycle heat dissipation of the entire sealing system, with good application effects.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A double-channel parallel stepped sealing structure for a high-pressure rotor pump with cooling and heat dissipation capabilities according to the present invention adopts a double-channel parallel stepped installation, and designs an open pump cover and a sleeve active circulation cooling and heat dissipation structure to block heat generation to achieve the effect of heat dissipation and temperature reduction. While improving the sealing performance, the service life of the components is also effectively guaranteed. It mainly consists of the left and right end covers of the main and auxiliary rotor bearings, the O-ring seals of the right end cover of the main and auxiliary rotor bearings, the left and right pump covers, the O-ring seals of the left pump cover, the pump housing, the O-ring seals of the pump housing, the ventilation and heat dissipation windows of the left and right pump covers, the parallel double-channel seals of the main and auxiliary rotors, the semi-open high-pressure seal seat seals of the main and auxiliary rotors, the semi-open high-pressure seal seats of the main and auxiliary rotors, the high-pressure seal pressing plates of the main and auxiliary rotors, the snap rings for the holes of the main and auxiliary rotors, the skeleton seals of the main and auxiliary rotors, the tapered roller bearings of the main and auxiliary rotors, the sleeves, the lubricating oil flow channels of the main and auxiliary rotor shafts, the external lubricating oil dynamic circulation cooling channels, etc.

[0008] The left and right end covers of the main and auxiliary rotor bearings are respectively connected to the left and right pump covers through the end cover bolt groups, and the left and right pump covers are connected to the pump housing through the pump cover fastening bolt groups. Since there is a gap I between the rotor and the pump cover end face, the pump housing and the left and right pump covers are sealed through the O-ring seals of the pump housing.

[0009] The remaining parts are described with a quarter-sealing structure. The auxiliary rotor parallel double-seal ring includes a grooved hard rubber seal ring, an O-shaped soft rubber seal ring I, and an O-shaped soft rubber seal ring II. Under the action of extrusion pressure, the grooved hard rubber seal ring and the O-shaped soft rubber seal ring I are closely attached to the shoulder end face of the right pump cover. The O-shaped soft rubber seal ring II is axially fixed through the semi-open high-pressure seal seat of the auxiliary rotor and is closely attached to the seal seat ring groove and the left end face of the seal pressing plate. The auxiliary rotor parallel double-seal ring has an interference fit between the grooved hard rubber seal ring and the outer ring of the shaft sleeve; the semi-open high-pressure seal seat of the auxiliary rotor is closely attached to the shoulder end face of the right pump cover and the left end face of the seal pressing plate, and is axially fixed with an internal hexagonal set screw through the through hole of the internal hexagonal set screw on the seal pressing plate of the auxiliary rotor high-pressure seal seat and the tapered hole of the internal hexagonal set screw in the seal seat. The auxiliary rotor high-pressure seal pressing plate is threadedly connected to the right pump cover; the orifice snap ring of the auxiliary rotor is fixed through the groove in the right pump cover and is also used for the axial fixation of the auxiliary rotor skeleton seal. The left end face of the skeleton seal is closely attached to the right end face of the snap ring, and the inner V surface of the skeleton seal is attached to the outer ring of the shaft sleeve. The lubricating oil circulating in the flow channel enters the ring groove of the skeleton seal for axial fixation, and the pressure generated by the oil increases the sealing tightness; the left end face of the inner ring of the tapered roller bearing of the auxiliary rotor is closely attached to the shaft sleeve, the shaft sleeve is closely attached to the auxiliary rotor, and the right end face of the outer ring of the bearing is closely attached to the left end face of the end cover for the axial fixation of the shaft sleeve and the bearing. The right end cover of the auxiliary rotor bearing is sealed with the right pump cover through the O-shaped seal ring of the auxiliary rotor bearing end cover; the above connections together constitute the entire sealing system.

[0010] This structure ① breaks through the previous method of installing the seal ring in the seal groove by thermal installation. This design adopts a semi-open type, and the installed seal ring is pressed on through another high-pressure seal seat and high-pressure seal pressing plate for fixation and sealing, solving the problem of seal damage caused by difficult assembly and disassembly of the previous seal ring. This structure is not only convenient for installation and disassembly, but also easy to control dimensions, easy to measure, and has high machining accuracy, avoiding seal leakage and damage problems caused by improper installation; ② The combination of the parallel stepped structure and the use of hard and soft rubber seal rings avoids the occurrence of clearance biting, and the groove structure in the grooved hard rubber seal ring can effectively accommodate the abrasive debris and foreign impurities generated by friction to reduce the wear of the rubber, thereby increasing its sealing performance; ③ The orifice snap ring in the structure eliminates the torsional deformation and extrusion gap of the skeleton seal, and the inner V surface of the skeleton seal increases the fitting area with the outer ring of the shaft sleeve through elastic deformation, solving the problem of inability to seal due to excessive clearance; the entire structure not only strengthens the sealing performance of the entire sealing system, but also ensures the service life, and at the same time avoids bearing failure caused by seal leakage and damage.

[0011] The bushing includes an outer bushing ring, an annular cooling channel, a lower channel, an upper channel, and a circulating channel opening; the annular cooling channel, the lower channel, and the upper channel form a dynamic circulating cooling and heat dissipation channel for the lubricating oil of the bushing; the dynamic circulating cooling and heat dissipation channel for the lubricating oil of the bushing and the external dynamic circulating cooling channel for the lubricating oil together form an air circulation cooling and heat dissipation and sealed internal circulating cooling and heat dissipation system.

[0012] The sealing liquid in the active circulating cooling and heat dissipation channel of this structure improves the lubrication and cooling conditions between the end faces, isolates the medium from the outside world, and at the same time changes the direction of the medium, enabling the sealed frictional heat of the system to be taken away in time, achieving the effect of cooling and heat dissipation, avoiding problems such as frictional damage, high-temperature deformation, and leakage caused by insufficient lubrication, and increasing the service life of the seal.

[0013] Four ventilation and heat dissipation windows are respectively opened on the left and right pump covers; an external dynamic circulating cooling channel for the lubricating oil is opened between the left and right pump covers and the pump housing. Under the action of the rotating force of the rotor shaft, the lubricating medium passes through the lubricating oil channels of the main and auxiliary rotor shafts, passes through the dynamic circulating cooling and heat dissipation channel of the bushing lubricating oil, and reaches the circulating channel opening of the bushing, and then goes to the bearing and the pump cover channel opening respectively through the circulating channel opening. The lubricating medium going to the pump cover channel opening flows through the entire external dynamic circulating cooling channel for the lubricating oil, while the lubricating medium going to the bearing flows through the stepped ring groove of the end cover and then returns to the pump cover channel opening and enters the entire external dynamic circulating cooling channel for the lubricating oil, thus forming the entire internal and external cooling and heat dissipation circulating system; the external dynamic circulating cooling channel for the lubricating oil and the stepped ring groove of the end cover together form a bearing circulating cooling and heat dissipation system.

[0014] This structure ① uses the ventilation and heat dissipation windows to take the generated heat to the outside through air circulation, blocking the mutual influence between the sealed heat and the bearing temperature rise, and avoiding the double failure problem; ② the bearing circulating cooling and heat dissipation system blocks the generation of heat, prevents the bearing temperature from rising too high, reduces the bearing friction and wear, and extends the bearing life.

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. It breaks through the previous method of installing the sealing ring in the sealing groove by thermal installation. This design adopts a semi-open type, and the installed sealing ring is pressed on through another high-pressure sealing seat and high-pressure sealing pressing plate for fixation and sealing, solving the problem of seal damage caused by difficult assembly and disassembly of the previous sealing ring. It is not only convenient for installation and disassembly, but also easy to control the size, easy to measure, with high machining accuracy, and at the same time avoids the problems of seal leakage and damage caused by improper installation.

[0017] 2. The combined use of a parallel stepped structure and a soft-hard rubber sealing ring avoids the occurrence of clearance biting. Moreover, the groove structure in the grooved hard rubber sealing ring can effectively accommodate the abrasives and foreign impurities generated by friction, reducing the wear of the rubber, thereby increasing the sealing performance. In addition, the inner V surface of the skeleton seal increases the fitting area with the outer ring of the shaft sleeve through elastic deformation, solving the problem of inability to seal due to excessive clearance. At the same time, it also avoids bearing failure caused by seal leakage and damage, achieving strict sealing and long service life of the rotor pump seal under high pressure.

[0018] 3. The dynamic circulation cooling and heat dissipation channel structure of the shaft sleeve lubricating oil and the external dynamic circulation cooling channel of the lubricating oil improve the lubrication and cooling conditions between the end faces, enabling the sealing friction heat of the system to be taken away in time, achieving the effect of cooling and heat dissipation, and avoiding problems such as friction damage, high-temperature deformation, and leakage caused by insufficient lubrication. This not only enhances the sealing performance of the entire sealing system but also ensures the service life.

[0019] 4. Ventilation and heat dissipation windows are opened on the pump cover, using air circulation to bring the generated heat to the outside, blocking the mutual influence between the sealing heat and the bearing temperature rise, and avoiding the double failure problem;

[0020] 5. The bearing circulation cooling and heat dissipation system blocks the generation of heat, prevents the bearing temperature from rising too high, while reducing bearing friction and wear, forming the key technology of bearing lubrication and heat dissipation, cracking the bearing lubrication and heat dissipation problems of high-pressure and large-displacement oil-transferring rotor pumps, and ensuring the long-life and stable operation of the bearings. Brief Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall sealing structure of a high-pressure rotor pump;

[0022] Figure 2 It is an exploded view of the sealing parts of a high-pressure rotor pump;

[0023] Figure 3 It is a structural diagram of the active circulation cooling and heat dissipation of the shaft sleeve of a high-pressure rotor pump;

[0024] Figure 4 It is a sectional view of the overall cooling circulation flow channel structure of an open pump cover;

[0025] In the figure: 1. Left end cover of auxiliary rotor bearing; 2. O-ring seal of left pump cover; 3. Left pump cover; 4. Ventilation and heat dissipation window of left pump cover; 5. Lubricating oil flow channel of auxiliary rotor shaft; 6. O-ring seal of pump casing; 7. Pump casing; 8. Double-channel parallel seal of auxiliary rotor; 81. Grooved hard rubber seal; 82. First O-ring soft rubber seal; 83. Second O-ring soft rubber seal; 9. Semi-open high-pressure seal seat seal of auxiliary rotor; 10. Semi-open high-pressure seal seat of auxiliary rotor; 101. Left end face of seal seat; 102. Right end face of seal seat; 103. Ring groove of seal seat; 104. Tapered hole of hexagon socket head cap screw in seal seat; 11. High-pressure seal pressing plate of auxiliary rotor; 111. Through hole of hexagon socket head cap screw in seal pressing plate; 112. Left end face of seal pressing plate; 12. Circlip for hole of auxiliary rotor; 121. Right end face of circlip; 13. Skeleton seal of auxiliary rotor; 131. Left end face of skeleton seal; 132. Inner V-face of skeleton seal; 133. Ring groove of skeleton seal; 14. Tapered roller bearing of auxiliary rotor; 141. Left end face of bearing inner ring; 142. Right end face of bearing outer ring; 15. O-ring seal of right end cover of auxiliary rotor bearing; 16. Right end cover of auxiliary rotor bearing; 161. Left end face of end cover; 162. Step ring groove of end cover; 17. Right end cover of main rotor bearing; 18. O-ring seal of right end cover of main rotor bearing; 19. Right pump cover; 191. Flow port of pump cover; 20. Ventilation and heat dissipation window of right pump cover; 21. Lubricating oil flow channel of main rotor shaft; 22. Double-channel parallel seal of main rotor; 23. Semi-open high-pressure seal seat seal of main rotor; 24. Semi-open high-pressure seal seat of main rotor; 25. High-pressure seal pressing plate of main rotor; 26. Circlip for hole of main rotor; 27. Skeleton seal of main rotor; 28. Tapered roller bearing of main rotor; 29. Left end cover of main rotor bearing; 30. Sleeve; 301. Outer ring of sleeve; 302. Annular cooling flow channel; 303. Lower flow channel; 304. Upper flow channel; 305. Circulation flow port; 31. Sealing system; 32. Dynamic circulation cooling and heat dissipation channel of sleeve lubricating oil; 33. External dynamic circulation cooling channel of lubricating oil; 34. Air circulation cooling and heat dissipation and internal circulation cooling and heat dissipation system of seal; 35. Bearing circulation cooling and heat dissipation system. Detailed implementation mode

[0026] The present invention will be further described below in conjunction with the accompanying drawings and examples:

[0027] As Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown in the figure, a double-channel parallel stepped sealing structure of a high-pressure rotor pump with cooling and heat dissipation ability according to the present invention mainly includes a left end cover 1 of a secondary rotor bearing, an O-ring seal 2 of a left pump cover, a left pump cover 3, a ventilation and heat dissipation window 4 of the left pump cover, a lubricating oil flow channel 5 of a secondary rotor shaft, an O-ring seal 6 of a pump housing, a pump housing 7, a double-channel seal 8 of a secondary rotor in parallel, a grooved hard rubber seal 81, a first O-ring soft rubber seal 82, a second O-ring soft rubber seal 83, a semi-open high-pressure seal seat seal 9 of a secondary rotor, a semi-open high-pressure seal seat 10 of a secondary rotor, a left end face 101 of the seal seat, a right end face 102 of the seal seat, a ring groove 103 of the seal seat, a tapered hole 104 of an internal hexagonal set screw of the seal seat, a high-pressure seal pressing plate 11 of a secondary rotor, a through hole 111 of an internal hexagonal set screw of the seal pressing plate, a left end face 112 of the seal pressing plate, a snap ring 12 for a hole of a secondary rotor, a right end face 121 of the snap ring, a skeleton seal 13 of a secondary rotor, a left end face 131 of the skeleton seal, an internal V-face 132 of the skeleton seal, a ring groove 133 of the skeleton seal, a tapered roller bearing 14 of a secondary rotor, a left end face 141 of the bearing inner ring, a right end face 142 of the bearing outer ring, an O-ring seal 15 of a right end cover of a secondary rotor bearing, a right end cover 16 of a secondary rotor bearing, a left end face 161 of the end cover, a stepped ring groove 162 of the end cover, a right end cover 17 of a main rotor bearing, an O-ring seal 18 of a right end cover of a main rotor bearing, a right pump cover 19, a flow port 191 of the pump cover, a ventilation and heat dissipation window 20 of the right pump cover, a lubricating oil flow channel 21 of a main rotor shaft, a double-channel seal 22 of a main rotor in parallel, a semi-open high-pressure seal seat seal 23 of a main rotor, a semi-open high-pressure seal seat 24 of a main rotor, a high-pressure seal pressing plate 25 of a main rotor, a snap ring 26 for a hole of a main rotor, a skeleton seal 27 of a main rotor, a tapered roller bearing 28 of a main rotor, a left end cover 29 of a main rotor bearing, a bushing 30, an outer ring 301 of the bushing, an annular cooling flow channel 302, a lower flow channel 303, an upper flow channel 304, a circulation flow port 305, a sealing system 31, a dynamic circulation cooling and heat dissipation channel 32 of lubricating oil for the bushing, an external dynamic circulation cooling channel 33 of lubricating oil, an air circulation cooling and heat dissipation and internal circulation cooling and heat dissipation system 34 of the seal, and a bearing circulation cooling and heat dissipation system 35.

[0028] As Figure 1 , Figure 2 shown, the left end cover 1 of the secondary rotor bearing, the left end cover 29 of the main rotor bearing, the right end cover 16 of the secondary rotor bearing, and the right end cover 17 of the main rotor bearing are respectively connected to the left pump cover 3 and the right pump cover 19 through a set of end cover bolts. The left pump cover 3 and the right pump cover 19 are connected to the pump housing 7 through a set of pump cover fastening bolts. Since there is a gap I between the rotor and the end face of the pump cover, the pump housing 7 is sealed with the left pump cover 3 and the right pump cover 19 through the pump housing O-ring seal 6.

[0029] As Figure 1 , Figure 2 , Figure 3As shown, taking a quarter of the whole as an example, the auxiliary rotor parallel double-channel seal ring 8 includes a groove-shaped hard rubber seal ring 81, an O-shaped soft rubber seal ring one 82, and an O-shaped soft rubber seal ring two 83. The groove-shaped hard rubber seal ring 81 and the O-shaped soft rubber seal ring one 82 are closely attached to the shoulder end face of the right pump cover 19 under the action of extrusion force. The O-shaped soft rubber seal ring two 83 is axially fixed through the auxiliary rotor semi-open high-pressure seal seat 10 and is closely attached to the seal seat ring groove 103 and the left end face 112 of the seal pressing plate. The auxiliary rotor parallel double-channel seal ring 8 has an interference fit between the groove-shaped hard rubber seal ring 81 and the outer ring 301 of the shaft sleeve. The auxiliary rotor semi-open high-pressure seal seat 10 is closely attached to the shoulder end face of the right pump cover 19 and the left end face 112 of the seal pressing plate, and is axially fixed by an internal hexagonal set screw through the through hole 111 of the internal hexagonal set screw of the seal pressing plate on the auxiliary rotor high-pressure seal pressing plate 11 and the tapered hole 104 of the internal hexagonal set screw of the seal seat. The auxiliary rotor high-pressure seal pressing plate 11 is threadedly connected to the right pump cover 19. The auxiliary rotor hole retaining ring 12 is fixed through the groove in the right pump cover 19 and is also used for the axial fixation of the auxiliary rotor skeleton seal 13. The left end face 131 of the skeleton seal is closely attached to the right end face 121 of the retaining ring. The inner V surface 132 of the skeleton seal is closely attached to the outer ring 301 of the shaft sleeve. The lubricating oil dynamically circulating in the flow channel enters the skeleton seal ring groove 133 for axial fixation. The left end face 141 of the bearing inner ring of the auxiliary rotor tapered roller bearing 14 is closely attached to the shaft sleeve 30. The shaft sleeve 30 is closely attached to the auxiliary rotor. The right end face 142 of the bearing outer ring is closely attached to the left end face 161 of the end cover for the axial fixation of the shaft sleeve 30 and the bearing. The right end cover 16 of the auxiliary rotor bearing and the right pump cover 19 are sealed by the O-shaped seal ring 15 of the auxiliary rotor bearing right end cover. The above connections together constitute the entire sealing system.

[0030] As Figure 1 , Figure 3 , Figure 4 shown, the shaft sleeve 30 includes an outer ring 301 of the shaft sleeve, an annular cooling flow channel 302, a lower flow channel 303, an upper flow channel 304, and a circulating flow port 305. The annular cooling flow channel 302, the lower flow channel 303, and the upper flow channel 304 constitute the shaft sleeve lubricating oil dynamic circulation cooling and heat dissipation channel 32. The shaft sleeve lubricating oil dynamic circulation cooling and heat dissipation channel 32 and the external lubricating oil dynamic circulation cooling channel 33 together constitute the air circulation cooling and heat dissipation and internal circulation cooling and heat dissipation system 34 of the seal.

[0031] As Figure 1 , Figure 3 , Figure 4As shown, the left pump cover 3 and the right pump cover 19 are respectively provided with four ventilation and heat dissipation windows, namely the left pump cover ventilation and heat dissipation window 4 and the right pump cover ventilation and heat dissipation window 20; an external lubricating oil dynamic circulation cooling channel 33 is provided between the left pump cover 3 and the right pump cover 19 and the pump housing 7. Under the action of the rotating force of the rotor shaft, the lubricating medium passes through the sub-rotor shaft lubricating oil flow channel 5 and the main rotor shaft lubricating oil flow channel 21 and reaches the circulation flow port 305 of the shaft sleeve through the shaft sleeve lubricating oil dynamic circulation cooling and heat dissipation channel 32, and then respectively goes to the bearing and the pump cover flow port 191 through the circulation flow port 305. The lubricating medium going to the pump cover flow port 191 flows through the entire external lubricating oil dynamic circulation cooling channel 33, while the lubricating medium going to the bearing flows through the end cover stepped ring groove 162 and then returns to the pump cover flow port 191 and enters the entire external lubricating oil dynamic circulation cooling channel 33. The above forms the entire internal and external cooling and heat dissipation circulation system; the external lubricating oil dynamic circulation cooling channel 33 and the end cover stepped ring groove 162 together constitute the bearing circulation cooling and heat dissipation system 35.

Claims

1. A dual-channel parallel stepped sealing structure of a high-pressure rotor pump with cooling and heat dissipation capabilities, characterized in that, it includes the left end cover of the secondary rotor bearing (1), the O-ring seal of the left pump cover (2), the left pump cover (3), the ventilation and heat dissipation window of the left pump cover (4), the lubricating oil flow channel of the secondary rotor shaft (5), the O-ring seal of the pump housing (6), the pump housing (7), the dual-channel seal of the secondary rotor in parallel (8), the grooved hard rubber seal (81), the first O-ring soft rubber seal (82), the second O-ring soft rubber seal (83), the semi-open high-pressure seal seat seal of the secondary rotor (9), the semi-open high-pressure seal seat of the secondary rotor (10), the left end face of the seal seat (101), the right end face of the seal seat (102), the ring groove of the seal seat (103), the tapered hole of the hexagon socket head cap screw in the seal seat (104), the high-pressure seal pressing plate of the secondary rotor (11), the through hole of the hexagon socket head cap screw in the seal pressing plate (111), the left end face of the seal pressing plate (112), the snap ring for the hole of the secondary rotor (12), the right end face of the snap ring (121), the skeleton seal of the secondary rotor (13), the left end face of the skeleton seal (131), the inner V-face of the skeleton seal (132), the ring groove of the skeleton seal (133), the tapered roller bearing of the secondary rotor (14), the left end face of the bearing inner ring (141), the right end face of the bearing outer ring (142), the O-ring seal of the right end cover of the secondary rotor bearing (15), the right end cover of the secondary rotor bearing (16), the left end face of the end cover (161), the stepped ring groove of the end cover (162), the right end cover of the main rotor bearing (17), the O-ring seal of the right end cover of the main rotor bearing (18), the right pump cover (19), the flow port of the pump cover (191), the ventilation and heat dissipation window of the right pump cover (20), the lubricating oil flow channel of the main rotor shaft (21), the dual-channel seal of the main rotor in parallel (22), the semi-open high-pressure seal seat seal of the main rotor (23), the semi-open high-pressure seal seat of the main rotor (24), the high-pressure seal pressing plate of the main rotor (25), the snap ring for the hole of the main rotor (26), the skeleton seal of the main rotor (27), the tapered roller bearing of the main rotor (28), the left end cover of the main rotor bearing (29), the shaft sleeve (30), the outer ring of the shaft sleeve (301), the annular cooling flow channel (302), the lower flow channel (303), the upper flow channel (304), the circulation flow port (305), the sealing system (31), the dynamic circulating cooling and heat dissipation channel of the lubricating oil for the shaft sleeve (32), the dynamic circulating cooling channel of the external lubricating oil (33), the air circulation cooling and heat dissipation and internal circulating cooling and heat dissipation system of the seal (34), the bearing circulating cooling and heat dissipation system (35); The description is made with a quarter-sealed structure. The secondary rotor parallel double-seal ring (8) includes a groove-shaped hard rubber seal ring (81), an O-shaped soft rubber seal ring one (82), and an O-shaped soft rubber seal ring two (83). The groove-shaped hard rubber seal ring (81) and the O-shaped soft rubber seal ring one (82) are pressed against the shoulder end face of the right pump cover (19) under the action of extrusion force. The O-shaped soft rubber seal ring two (83) is axially fixed through the secondary rotor semi-open high-pressure seal seat (10) and is pressed against the seal seat ring groove (103) and the left end face of the seal pressing plate (112). The secondary rotor parallel double-seal ring (8) has an interference fit between the groove-shaped hard rubber seal ring (81) and the outer ring of the shaft sleeve (301). The secondary rotor semi-open high-pressure seal seat (10) is pressed against the shoulder end face of the right pump cover (19) and the left end face of the seal pressing plate (112), and is axially fixed with an internal hexagon socket head cap screw through the through hole of the internal hexagon socket head cap screw on the secondary rotor high-pressure seal pressing plate (11) (111) and the tapered hole of the internal hexagon socket head cap screw in the seal seat (104). The secondary rotor high-pressure seal pressing plate (11) is threadedly connected to the right pump cover (19). The secondary rotor hole snap ring (12) is fixed through the groove in the right pump cover (19), and is also used for the axial fixation of the secondary rotor skeleton seal (13). The left end face of the skeleton seal (131) is closely attached to the right end face of the snap ring (121), and the inner V-face of the skeleton seal (132) is closely attached to the outer ring of the shaft sleeve (301). The left end face of the bearing inner ring (141) of the secondary rotor tapered roller bearing (14) is closely attached to the shaft sleeve (30), the shaft sleeve (30) is closely attached to the secondary rotor, and the right end face of the bearing outer ring (142) is closely attached to the left end face of the end cover (161) for the axial fixation of the shaft sleeve (30) and the bearing. A seal is made between the secondary rotor bearing right end cover (16) and the right pump cover (19) through the O-shaped seal ring (15) of the secondary rotor bearing right end cover. The shaft sleeve lubricating oil dynamic circulation cooling and heat dissipation channel (32) and the external lubricating oil dynamic circulation cooling channel (33) together constitute an air circulation cooling and heat dissipation and internal circulation cooling and heat dissipation system for sealing (34), and the external lubricating oil dynamic circulation cooling channel (33) and the end cover stepped ring groove (162) together constitute a bearing circulation cooling and heat dissipation system (35).

2. A double-channel parallel stepped seal structure of a high-pressure rotor pump with cooling and heat dissipation capabilities according to claim 1, characterized in that: the shaft sleeve (30) includes an outer ring of the shaft sleeve (301), an annular cooling flow channel (302), a lower flow channel (303), an upper flow channel (304), and a circulation flow port (305).

3. A double-channel parallel stepped seal structure of a high-pressure rotor pump with cooling and heat dissipation capabilities according to claim 1, characterized in that: the shaft sleeve lubricating oil dynamic circulation cooling and heat dissipation channel (32) includes an annular cooling flow channel (302), a lower flow channel (303), and an upper flow channel (304).

4. A double-channel parallel stepped seal structure of a high-pressure rotor pump with cooling and heat dissipation capabilities according to claim 1, It is characterized in that: An external lubricating oil dynamic circulation cooling channel (33) is provided between the left pump cover (3) and the right pump cover (19) and the pump housing (7). Under the action of the rotational force of the rotor shaft, the lubricating medium passes through the lubricating oil flow channel (5) of the auxiliary rotor shaft and the lubricating oil flow channel (21) of the main rotor shaft, and reaches the circulation flow port (305) of the shaft sleeve (30) through the shaft sleeve lubricating oil dynamic circulation cooling and heat dissipation channel (32). Then, through the circulation flow port (305), it goes to the bearing and the pump cover flow port (191) respectively. The lubricating medium going to the pump cover flow port (191) flows through the entire external lubricating oil dynamic circulation cooling channel (33), and the lubricating medium going to the bearing flows through the end cover stepped ring groove (162) and then returns to the pump cover flow port (191) and enters the entire external lubricating oil dynamic circulation cooling channel (33). The above forms the entire internal and external cooling and heat dissipation circulation system.

5. A double-channel parallel stepped sealing structure of a high-pressure rotor pump with cooling and heat dissipation ability according to claim 1, It is characterized in that: The left pump cover (3) and the right pump cover (19) are respectively provided with four ventilation and heat dissipation windows, namely the left pump cover ventilation and heat dissipation window (4) and the right pump cover ventilation and heat dissipation window (20).

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