Dynamic sealing structure of planetary transmission shaft for pump

Abstract

The utility model discloses a dynamic sealing structure of a planetary transmission shaft for a pump, which relates to the field of planetary transmission shafts, solves the problem that the existing sealing equipment is difficult to supplement lubricating oil to the transmission shaft in time, and comprises a driving shaft barrel and a sun wheel arranged on the outer side of the driving shaft barrel, and an annular wheel is arranged on the outer side of the sun wheel. Three planet wheels which are annularly distributed at equal intervals are mounted between the annular wheel and the sun wheel; the sealing cylinder is arranged on the outer side of the annular wheel; the oil supplementing mechanism is used for supplementing lubricating oil to the sun gear and the planet gear, and the oil supplementing mechanism is installed in the sealing barrel. By means of the oil supplementing mechanism, when the driving shaft barrel runs, the planet gear can be lubricated, the lubricating oil enters tooth grooves of the annular gear and the sun gear along with rotation of the planet gear, and therefore the planet gear can be driven to rotate. Therefore, the effect of quickly supplementing oil is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of planetary transmission shaft, concretely is a kind of dynamic sealing structure of pump planetary transmission shaft. BACKGROUND

[0002] Planetary transmission shaft is a kind of special transmission device, usually used in pump to realize the efficient, stable and reliable operation of pump, by sun gear, planetary gear, planet carrier and ring gear, when sun gear is driven, it will drive planetary gear to rotate around it, while planetary gear will also rotate around planet carrier, this compound motion makes planetary transmission shaft have high transmission ratio and large carrying capacity, planetary transmission shaft has the advantages of compact structure, transmission stable, low noise, large carrying capacity etc.

[0003] The existing planetary transmission shaft needs to be sealed by sealing equipment when in use, but the gap between sealing equipment is small, and the sealing equipment needs to be disassembled and supplemented, and repeated disassembly can cause the sealing equipment to loosen, which reduces the sealing performance of the transmission shaft, so the technical personnel in the field provide a kind of dynamic sealing structure of pump planetary transmission shaft to solve the problems raised in the above background technology. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of dynamic sealing structure of pump planetary transmission shaft, can solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of dynamic sealing structure of pump planetary transmission shaft, including drive shaft cylinder and the sun gear installed on the outer side of the drive shaft cylinder, the outer side of the sun gear is provided with annular wheel, three annular equidistantly distributed planetary gears are installed between the annular wheel and the sun gear, further comprising: sealing cylinder is arranged on the outer side of the annular wheel, the outer side of the drive shaft cylinder is installed with sealing cover one, three planetary gears are installed with rotating frame between, the surface of the rotating frame is fixedly installed with transmission rod in the inner side of the drive shaft cylinder, the outer side of the transmission rod is installed with sealing cover two, the sealing cover two and the sealing cover one are installed at the both ends of the sealing cylinder respectively, and the drive shaft cylinder is provided with dynamic sealing by sealing cylinder, sealing cover one and sealing cover two;Oil supplementing mechanism is used to supplement lubricating oil to the sun gear and the planetary gear, and the oil supplementing mechanism is installed in the inside of the sealing cylinder;Oil closing mechanism is used to close the sun gear and the planetary gear, and the oil closing mechanism is installed in the inside of the sealing cylinder.

[0006] Preferably, the oil supplementing mechanism comprises a positioning plate mounted outside the annular wheel, the top of the positioning plate is provided with an annular oil storage box for storing lubricating oil, a plurality of mounting rods are fixedly connected to one side of the annular oil storage box in a ring shape and at equal intervals, one end of the mounting rod is fixedly connected with a support plate, the outer side of the drive shaft cylinder is fixedly connected with a threaded cylinder, a plurality of support plates are fixedly connected with a sliding box matched with the threaded cylinder, the threaded cylinder can move the sliding box, the end of the positioning plate close to the mounting rod is fixedly connected with an oil inlet ring, a plurality of oil discharge holes are arranged on the bottom of the oil inlet ring in an equal interval, the annular oil storage box injects lubricating oil into the annular wheel and the planetary gear through the oil discharge holes on the oil inlet ring, the positioning plate and the sealing cylinder are fixedly connected with a limiting ring to provide a limit for the movement of the annular oil storage box, the side of the sun gear close to the sealing cover one is provided with a limiting plate, a plurality of limiting rods are fixedly connected between the limiting plate and the sealing cover one and slide through the support plate to provide a limit for the movement of the sliding box, when the drive shaft cylinder rotates, the threaded cylinder can move the support plate on the sliding box along the outer side of the limiting rod, and the opening on the annular oil storage box is aligned with the oil inlet ring to lubricate the planetary gear through the oil discharge holes on the oil inlet ring.

[0007] Preferably, the oil supplementing mechanism comprises a positioning plate mounted outside the annular wheel, the top of the positioning plate is provided with an annular oil storage box for storing lubricating oil, a plurality of mounting rods are fixedly connected to one side of the annular oil storage box in a ring shape and at equal intervals, one end of the mounting rod is fixedly connected with a support plate, the outer side of the drive shaft cylinder is fixedly connected with a threaded cylinder, a plurality of support plates are fixedly connected with a sliding box matched with the threaded cylinder, the threaded cylinder can move the sliding box, the end of the positioning plate close to the mounting rod is fixedly connected with an oil inlet ring, a plurality of oil discharge holes are arranged on the bottom of the oil inlet ring in an equal interval, the annular oil storage box injects lubricating oil into the annular wheel and the planetary gear through the oil discharge holes on the oil inlet ring, the positioning plate and the sealing cylinder are fixedly connected with a limiting ring to provide a limit for the movement of the annular oil storage box, the side of the sun gear close to the sealing cover one is provided with a limiting plate, a plurality of limiting rods are fixedly connected between the limiting plate and the sealing cover one and slide through the support plate to provide a limit for the movement of the sliding box, when the drive shaft cylinder rotates, the threaded cylinder can move the support plate on the sliding box along the outer side of the limiting rod, and the opening on the annular oil storage box is aligned with the oil inlet ring to lubricate the planetary gear through the oil discharge holes on the oil inlet ring.

[0008] Preferably, the oil discharge holes on the oil inlet ring are inclined structures, facilitating the oil injection to the planetary gear.

[0009] Preferably, the outer side of the positioning plate is provided with a rubber sleeve, and the outer side of the positioning plate is provided with an annular groove for mounting the rubber sleeve, improving the sealing performance of the opening of the annular oil storage box.

[0010] Preferably, the surface of the positioning plate is provided with an oil discharge groove corresponding to the oil inlet ring, facilitating the lubricating oil to enter the oil inlet ring.

[0011] Preferably, the oil inlet ring is connected with a positioning ring near one end of the ring wheel, and an annular cavity is formed in the outer side of the ring wheel for sliding insertion of the positioning ring, so that the positioning plate is conveniently installed.

[0012] Preferably, the outer side of the drive shaft cylinder is provided with a positioning shaft one, and the positioning shaft one is fixedly installed on the surface of the sealing cover one, so that the stability and air tightness of the drive shaft cylinder are improved.

[0013] Preferably, the outer side of the transmission rod is provided with a positioning shaft two, and the positioning shaft two is fixedly installed on the surface of the sealing cover two, so that the stability and air tightness of the transmission rod are improved.

[0014] Preferably, the sealing cover two and the sealing cylinder are detachable, so that the ring wheel is conveniently installed, transmitted and maintained.

[0015] Compared with the prior art, the utility model has the advantages that:

[0016] 1. The oil supplementing mechanism is used, when the drive shaft cylinder rotates, the sliding box upper support plate is moved along the outer side of the limiting rod through the threaded cylinder, the opening on the annular oil storage box is aligned with the oil inlet ring, the lubricating oil is lubricated to the planetary gear through the oil outlet hole on the oil inlet ring, and the effect of rapid oil supplementing is achieved.

[0017] 2. The oil closing mechanism is used, the drive shaft cylinder drives the sliding ring to rotate along the inner side of the sliding box, the abutting block is abutted against the insertion slot on the sliding box, the sliding box is stably moved, when the sliding box is in contact with the sealing cover one or the limiting plate, the abutting block is retracted into the cavity by the elastic force of the spring, the sliding ring can be continuously rotated, and the positioning plate can block the opening of the annular oil storage box, so that the effect of automatic oil closing is achieved. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a whole structure schematic view of the utility model;

[0019] Figure 2 It is a structure schematic view of the rotating frame and the planetary gear in the utility model;

[0020] Figure 3 It is a structure schematic view of the sliding box and the drive shaft cylinder in the utility model;

[0021] Figure 4 It is a structure schematic view of the support plate and the annular oil storage box in the utility model;

[0022] Figure 5 It is a structure schematic view of the oil inlet ring and the positioning plate in the utility model;

[0023] Figure 6 It is a structure schematic view of the abutting block and the sliding ring in the utility model.

[0024] In the figure: 1, drive shaft cylinder; 2, sun gear; 3, oil supplement mechanism; 301, positioning plate; 302, annular oil storage box; 303, mounting rod; 304, threaded cylinder; 305, sliding box; 306, oil inlet ring; 307, limiting ring; 308, limiting plate; 309, limiting rod; 310, support plate; 4, oil closing mechanism; 401, sliding ring; 402, stop block; 403, spring; 5, annular gear; 6, planetary gear; 7, sealing cylinder; 8, sealing cover one; 9, rotating frame; 10, transmission rod; 11, sealing cover two; 12, rubber sleeve; 13, positioning ring; 14, positioning shaft one; 15, positioning shaft two. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0026] Embodiment one

[0027] Please refer to Figures 1-4 , the dynamic sealing structure of a planetary transmission shaft for a pump in the figure, including a drive shaft cylinder 1 and a sun gear 2 installed on the outer side of the drive shaft cylinder 1, the outer side of the sun gear 2 is provided with an annular gear 5, three planetary gears 6 are installed between the annular gear 5 and the sun gear 2, and the three planetary gears 6 are distributed in a ring shape at equal intervals, further including: a sealing cylinder 7 provided on the outer side of the annular gear 5, a sealing cover one 8 installed on the outer side of the drive shaft cylinder 1, a rotating frame 9 installed between the three planetary gears 6, a transmission rod 10 fixedly installed on the surface of the rotating frame 9 and located inside the drive shaft cylinder 1, a sealing cover two 11 installed on the outer side of the transmission rod 10, the sealing cover two 11 and the sealing cover one 8 are respectively installed at both ends of the sealing cylinder 7, and the drive shaft cylinder 1 is provided with dynamic sealing through the sealing cylinder 7, the sealing cover one 8 and the sealing cover two 11; an oil supplement mechanism 3 for supplementing lubricating oil to the sun gear 2 and the planetary gears 6, the oil supplement mechanism 3 is installed inside the sealing cylinder 7; an oil closing mechanism 4 for closing the sun gear 2 and the planetary gears 6 after supplementing oil, the oil closing mechanism 4 is installed inside the sealing cylinder 7.

[0028] Please refer to Figures 3-6The oil supplementing mechanism 3 in the drawing comprises a positioning plate 301 installed outside the annular wheel 5, the top of the positioning plate 301 is provided with an annular oil storage box 302 for storing lubricating oil, a plurality of installation rods 303 in annular equidistant distribution are fixedly connected to one side of the annular oil storage box 302 close to the sealing cover 1, one end of the installation rod 303 is fixedly connected with a support plate 310, the outer side of the driving shaft cylinder 1 is fixedly connected with a threaded cylinder 304, a sliding box 305 matched with the threaded cylinder 304 is fixedly connected between the plurality of support plates 310, the threaded cylinder 304 can move the sliding box 305, the positioning plate 301 is fixedly connected with an oil inlet ring 306 at one end close to the installation rod 303, a plurality of oil outlet holes in equidistant distribution are formed in the bottom of the oil inlet ring 306, the annular oil storage box 302 injects lubricating oil between the annular wheel 5 and the planetary wheel 6 through the oil outlet holes on the oil inlet ring 306, the positioning plate 301 is fixedly connected with a limiting ring 307 between the sealing cylinder 7, the limiting ring 307 provides limiting for the movement of the annular oil storage box 302, the sun gear 2 is provided with a limiting plate 308 at one side close to the sealing cover 1, a plurality of limiting rods 309 slidingly penetrating the support plate 310 are fixedly connected between the limiting plate 308 and the sealing cover 1, the limiting rods 309 provide limiting for the movement of the sliding box 305;

[0029] When the driving shaft cylinder 1 rotates, the threaded cylinder 304 drives the support plate 310 on the sliding box 305 to move along the outside of the limiting rod 309, the support plate 310 drives the annular oil storage box 302 on the installation rod 303 to move along the outside of the positioning plate 301, when the opening on the annular oil storage box 302 is aligned with the oil inlet ring 306, the annular oil storage box 302 discharges lubricating oil, and the planetary wheel 6 is lubricated through the oil outlet holes on the oil inlet ring 306, thereby achieving the effect of rapid oil supplementing.

[0030] Please refer to Figure 4 and Figure 6 The oil closing mechanism 4 in the drawing comprises a sliding ring 401 rotatably installed inside the sliding box 305, the inside of the sliding ring 401 is matched with the threaded cylinder 304, the outside of the sliding ring 401 is provided with four annular equidistant distribution abutting blocks 402, the outside of the sliding ring 401 is provided with cavities for limiting sliding of the abutting blocks 402, springs 403 are fixedly connected between the cavities and the abutting blocks 402, one end of the abutting block 402 away from the spring 403 is in arc structure, the inside of the sliding box 305 is provided with insertion grooves for limiting insertion of the abutting blocks 402, the spring 403 can insert the abutting block 402 into the insertion groove on the sliding box 305;

[0031] When the driving shaft cylinder 1 rotates, the sliding ring 401 is driven to rotate along the inner side of the sliding box 305 by the threaded cylinder 304, and the sliding ring 401 is abutted against the insertion slot on the sliding box 305 by the abutting block 402, so that the sliding ring 401 drives the sliding box 305 to rotate, and the sliding box 305 can move along the limiting rod 309 stably by the support plate 310. When the sliding box 305 contacts the sealing cover 1 or the limiting plate 308, the blocking force of the sealing cover 1 or the limiting plate 308 is used to make the sliding box 305 push the abutting block 402 into the cavity on the sliding ring 401 through the insertion slot, so that the sliding ring 401 can continuously rotate and the sliding box 305 remains stationary. Thus, the annular oil storage box 302 remains on the outer side of the positioning plate 301, and the positioning plate 301 can block the opening of the annular oil storage box 302, thereby achieving the effect of automatic oil closing.

[0032] The working principle of facilitating the replenishment of lubricating oil to the planetary wheel 6 is as follows: first, the user opens the pump, and the driving device in the pump drives the driving shaft cylinder 1 to rotate in the opposite direction. The threaded cylinder 304 drives the sliding ring 401 to rotate along the inner side of the sliding box 305, and the sliding ring 401 is abutted against the insertion slot on the sliding box 305 by the abutting block 402, so that the sliding ring 401 drives the sliding box 305 to rotate, and the sliding box 305 can move along the limiting rod 309 stably by the support plate 310, so that the support plate 310 drives the annular oil storage box 302 on the mounting rod 303 to move along the outer side of the positioning plate 301. When the opening on the annular oil storage box 302 is aligned with the oil inlet ring 306, the annular oil storage box 302 discharges lubricating oil and lubricates the planetary wheel 6 through the oil discharge hole on the oil inlet ring 306. After the oil replenishment is completed, the user operates the driving device in the pump, so that the driving device drives the driving shaft cylinder 1 to rotate in the positive direction. When the sliding box 305 contacts the limiting plate 308, the blocking force of the limiting plate 308 is used to make the sliding box 305 push the abutting block 402 into the cavity on the sliding ring 401 through the insertion slot, so that the sliding ring 401 can continuously rotate and the sliding box 305 remains stationary. At this time, the annular oil storage box 302 is away from the oil inlet ring 306 and remains on the outer side of the positioning plate 301, and the positioning plate 301 can block the opening of the annular oil storage box 302, thereby achieving the effects of rapid replenishment of lubricating oil and closing of the oil discharge hole, and maintaining the sealing of the annular wheel 5.

[0033] Example Two

[0034] Please refer to Figure 5, the oil hole on the oil inlet ring 306 is inclined, which facilitates the spraying of lubricating oil to the direction of the planetary gear 6, the outer side of the positioning plate 301 is provided with a rubber sleeve 12, the outer side of the positioning plate 301 is provided with an annular groove for mounting the rubber sleeve 12, thereby improving the sealing performance of the opening of the annular oil storage box 302, the surface of the positioning plate 301 is provided with an oil discharge groove corresponding to the oil inlet ring 306, thereby facilitating the entry of lubricating oil into the oil inlet ring 306, and one end of the oil inlet ring 306 close to the annular wheel 5 is connected with a positioning ring 13, the outer side of the annular wheel 5 is provided with an annular cavity for slidingly inserting the positioning ring 13, thereby facilitating the installation of the positioning plate 301.

[0035] In the embodiment, when the annular oil storage box 302 is aligned with the oil discharge groove on the positioning plate 301, the lubricating oil can be sprayed to the planetary gear 6 through the oil hole on the oil inlet ring 306, and the inclined oil hole facilitates the rapid spraying of lubricating oil to the planetary gear 6, and when the annular oil storage box 302 moves, the rubber sleeve 12 can seal the annular oil storage box 302, thereby improving the sealing performance of the annular oil storage box 302.

[0036] Embodiment three

[0037] Please refer to Figures 1-3 The embodiment is further illustrated with reference to other embodiments, and the outer side of the drive shaft cylinder 1 is provided with a positioning shaft one 14, the positioning shaft one 14 is fixedly installed on the surface of the sealing cover one 8, thereby improving the stability and air tightness of the rotation of the drive shaft cylinder 1, the outer side of the transmission rod 10 is provided with a positioning shaft two 15, the positioning shaft two 15 is fixedly installed on the surface of the sealing cover two 11, thereby improving the stability and air tightness of the rotation of the transmission rod 10, and the sealing cover two 11 and the sealing cylinder 7 are detachable, thereby facilitating the installation, transmission and cleaning and maintenance of the annular wheel 5.

[0038] In the embodiment, the positioning shaft one 14 and the positioning shaft two 15 can respectively improve the stability of the rotation of the drive shaft cylinder 1 and the transmission rod 10, and improve the sealing performance of the sealing cover one 8 and the sealing cover two 11, the user can install the transmission device and the annular wheel 5 by detaching the sealing cover two 11, and the cleaning and maintenance can be performed.

[0039] It should be noted that, in the present document, the terms such as first and second, etc., are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process-method-article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or inherent to such process-method-article or device.

[0040] While embodiments of the present application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and spirit of the present application and that various changes in form and details can be made without departing from the principles and spirit of the present application. The scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A dynamic seal structure of a planetary transmission shaft for a pump, comprising a driving shaft cylinder (1) and a sun gear (2) mounted outside the driving shaft cylinder (1), an annular gear (5) is arranged outside the sun gear (2), three planetary gears (6) are mounted between the annular gear (5) and the sun gear (2) in a ring shape and equidistantly distributed, characterized in that, Also include: The outer side of the drive shaft cylinder (1) is provided with a sealing cover one (8), a rotating frame (9) is installed between the three planetary gears (6), the surface of the rotating frame (9) is fixedly installed with a transmission rod (10) located inside the drive shaft cylinder (1), the outer side of the transmission rod (10) is installed with a sealing cover two (11), the sealing cover two (11) and the sealing cover one (8) are installed at both ends of the sealing cylinder (7) respectively; The oil supplementing mechanism (3) is used for supplementing lubricating oil to the sun gear (2) and the planetary gear (6), and is installed inside the sealing cylinder (7); The oil closing mechanism (4) is used for closing the oil supplementing of the sun gear (2) and the planetary gear (6), and is installed inside the sealing cylinder (7).

2. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 1, characterized in that: The oil supplementing mechanism (3) comprises a positioning plate (301) installed on the outer side of the annular gear (5), the top of the positioning plate (301) is provided with an annular oil storage box (302), one side of the annular oil storage box (302) close to the sealing cover one (8) is fixedly connected with a plurality of installation rods (303) distributed equidistantly in a ring shape, one end of the installation rod (303) is fixedly connected with a supporting plate (310), the outer side of the drive shaft cylinder (1) is fixedly connected with a threaded cylinder (304), a plurality of supporting plates (310) are fixedly connected with a sliding box (305) matched with the threaded cylinder (304), one end of the positioning plate (301) close to the installation rod (303) is fixedly connected with an oil inlet ring (306), a plurality of oil discharge holes distributed equidistantly are formed in the bottom of the oil inlet ring (306), the positioning plate (301) and the sealing cylinder (7) are fixedly connected with a limiting ring (307), one side of the sun gear (2) close to the sealing cover one (8) is provided with a limiting plate (308), the limiting plate (308) and the sealing cover one (8) are fixedly connected with a plurality of limiting rods (309) slidingly penetrating through the supporting plate (310).

3. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 2, characterized in that: The oil closing mechanism (4) comprises a sliding ring (401) rotatably installed inside the sliding box (305), the inner side of the sliding ring (401) is matched with the threaded cylinder (304), the outer side of the sliding ring (401) is provided with four abutting blocks (402) distributed equidistantly in a ring shape, a cavity for limiting sliding of the abutting blocks (402) is formed in the outer side of the sliding ring (401), the spring (403) is fixedly connected between the cavity and the abutting blocks (402), the end of the abutting blocks (402) away from the spring (403) is in an arc structure, and the inner side of the sliding box (305) is provided with a plug groove for limiting plug connection of the abutting blocks (402).

4. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 2, characterized in that: The oil discharge holes on the oil inlet ring (306) are in an inclined structure.

5. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 2, characterized in that: The outer side of the positioning plate (301) is provided with a rubber sleeve (12), and the outer side of the positioning plate (301) is provided with an annular groove for installing the rubber sleeve (12).

6. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 2, characterized in that: The positioning plate (301) is provided with an oil discharge groove corresponding to the oil inlet ring (306).

7. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 2, characterized in that: The positioning ring (13) is connected to one end of the oil inlet ring (306) close to the annular wheel (5), and the outer side of the annular wheel (5) is provided with an annular cavity for sliding insertion of the positioning ring (13).

8. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 1, characterized in that: The outer side of the driving shaft cylinder (1) is provided with a positioning shaft one (14) fixedly installed on the surface of the sealing cover one (8).

9. A mechanical seal for a planetary transmission shaft for a pump as defined in claim 1, wherein: The outer side of the transmission rod (10) is provided with a positioning shaft two (15) fixedly installed on the surface of the sealing cover two (11).

10. A mechanical seal structure for a planetary transmission shaft of a pump according to claim 1, characterized in that: The sealing cover two (11) and the sealing cylinder (7) are detachable.

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