CN212959274U

CN212959274U - Multistage drainage pump rotor guiding mechanism

Info

Publication number: CN212959274U
Application number: CN202021609250.2U
Authority: CN
Inventors: 狄辉彬
Original assignee: Zhejiang Shangpu Energy Equipment Co ltd
Current assignee: Zhejiang Shangpu Technology Group Co.,Ltd.
Priority date: 2020-08-05
Filing date: 2020-08-05
Publication date: 2021-04-13
Anticipated expiration: 2030-08-05

Abstract

The utility model provides a multistage drainage pump rotor guiding mechanism belongs to mechanical technical field. The utility model discloses in, the hydrophobic pump includes the pump case and fixes the tailcap outside the pump case, the rotor level is located in the pump case, the rotor outer end stretches out the pump case and is in the tailcap, the rotor passes through the bearing and rotates with the tailcap to be connected, bearing inner circle both ends have tightly pressed respectively and have pressed set one and pressed set two, press set one and press set two and all fix on the rotor, press set one to be located between bearing and the pump case, guiding mechanism is including the cover at the outer guide pin bushing of pressing set one, be equipped with annular guide slot in the tailcap, the guide ring has on the guide pin bushing outer wall, the guide ring is inserted in annular guide slot, annular step one has been seted up on the pressure set outer wall, annular step one comprises annular lateral wall and annular diapire, and annular diapire is located between annular lateral wall and the bearing, the spiro union has the pressure cap on the annular lateral wall, the. The utility model discloses simple to operate.

Description

Multistage drainage pump rotor guiding mechanism

Technical Field

The utility model belongs to the technical field of machinery, a multistage drainage pump, especially a multistage drainage pump rotor guiding mechanism are related to.

Background

The drainage pump is a pump for sending drainage of a primary heater into a water supply pipe at the outlet of the primary heater.

The existing drainage pump is a multi-stage drainage pump as disclosed in chinese patent library [ application number: 201320008640.8, comprising a water inlet section, a water outlet section, a front pump bracket, a rear pump bracket, a primary impeller, a primary section, a middle section, a tail cover, a mechanical seal gland, a main shaft, a first bearing body, a second bearing body, a first bearing end cover, a second bearing end cover, a first bearing cover, a second bearing cover, a driving end bearing assembly and a non-driving end bearing assembly, wherein an inducer at the front end of the primary impeller is arranged on the main shaft; the water inlet section is fixed on the front pump bracket by a fastener in a central supporting mode, and the lower end of the water inlet section is limited to move circumferentially by contacting with the circumference of the limiting block; the water outlet section is fixed on the rear pump bracket by a fastener in a central supporting mode, and the lower end of the water outlet section is guided in a mode of contacting with two axial sides of the guide key, so that thermal expansion is facilitated; the main shaft is fixed with a guide sleeve which plays a role in guiding.

In the actual product, the guide sleeve mounting mode is as follows: the guide sleeve is provided with a circle of through bolt holes, bolts are screwed in the bolt holes, and the end parts of the bolts are tightly pressed on the side wall of the rotating shaft to position the guide sleeve. There are two problems with this approach: 1. multiple bolts are screwed tightly, so the operation steps are more complicated; 2. the screwing degree is judged manually, and the probability of not screwing the bolt exists, so that the positioning of the guide sleeve is influenced, and the guide failure is caused.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the problems in the prior art, and provides a multistage drainage pump rotor guide mechanism with convenient installation and stable structure.

The purpose of the utility model can be realized by the following technical proposal: a multi-stage rotor guide mechanism of a drainage pump comprises a pump shell and a tail cover fixed outside the pump shell, wherein a rotor is horizontally arranged in the pump shell, the outer end of the rotor extends out of the pump shell and is positioned in the tail cover, the rotor is rotationally connected with the tail cover through a bearing, a first pressing sleeve and a second pressing sleeve are respectively pressed at two ends of the inner ring of the bearing, the first pressing sleeve and the second pressing sleeve are sleeved and fixed on the rotor, the guide mechanism comprises a guide sleeve sleeved outside the first pressing sleeve, an annular guide groove coaxial with the rotor is arranged in the tail cover, a guide ring is arranged on the outer wall of the guide sleeve and inserted in the annular guide groove, it is characterized in that the outer wall of the first pressing sleeve is provided with a first annular step which is composed of an annular side wall and an annular bottom wall, and the annular bottom wall is positioned between the annular side wall and the bearing, the annular side wall is screwed with the pressure cap, the guide sleeve is positioned in the first annular step, and two end surfaces of the guide sleeve are respectively in close contact with the pressure cap and the annular bottom wall.

The guide sleeve presss from both sides tightly and realizes the location between pressure cap and annular diapire, like this when actual equipment, only need to screw the pressure cap this step alright accomplish the guide sleeve fixed, have simple to operate's advantage, simultaneously, press the cap and press a cover thread engagement to form great friction to effectively strengthen the intensity of locking the guide sleeve, make guiding mechanism structure more stable, thereby ensure its steady operation.

In the multistage steam trap pump rotor guide mechanism, the axial section of the annular guide groove is approximately trapezoidal, the annular guide groove is composed of two groove side walls and a groove bottom wall positioned between the two groove side walls, an included angle formed between the groove side walls and the groove bottom wall is an obtuse angle, and the axial section of the guide ring is trapezoidal matched with the annular guide groove so as to better guide the rotation of the rotor.

In the multistage steam trap pump rotor guiding mechanism, the rotor side wall is provided with a clamp spring groove for installing a clamp spring, the inner wall of one end of the pressing sleeve I, which is far away from the bearing, is provided with a second annular step matched with the clamp spring, and the outer side of the clamp spring is clamped in the second annular step and tightly pressed on the bottom wall of the second annular step.

In the multi-stage steam trap pump rotor guide mechanism, the tail cover is composed of a barrel-shaped main body fixedly connected with the pump shell and a ring body fixed in the main body, the ring body is sleeved outside the first pressing sleeve, the annular guide groove is arranged on the ring body, and the ring body and the first pressing sleeve form sealing through a sealing ring.

In the multi-stage drainage pump rotor guide mechanism, one end of the ring body is integrally formed with an annular raised head, the annular raised head and the ring body are coaxially arranged, and the annular raised head is tightly pressed on the end face of the outer ring of the bearing.

In the multistage drainage pump rotor guide mechanism, the inner side wall of the ring body is provided with an annular groove coaxial with the ring body, the sealing ring is positioned in the annular groove, and the inner side wall of the sealing ring is abutted against the pressing sleeve.

Compared with the prior art, the multistage drainage pump rotor guide mechanism adopts the guide sleeve to clamp and realize positioning between the pressure cap and the annular bottom wall, so that when in actual assembly, the guide sleeve can be fixed by only screwing the pressure cap, and the multistage drainage pump rotor guide mechanism has the advantage of convenient installation.

Drawings

Fig. 1 is a schematic diagram of a multi-stage hydrophobic pump.

Fig. 2 is an enlarged schematic view of a structure at a in fig. 1.

Fig. 3 is a schematic structural diagram of the first pressing sleeve.

In the drawings, 1, a pump casing; 2. a tail cover; 2a, a main body; 2b, a ring body; 2b1, annular nose; 2b2, annular guide groove; 3. a rotor; 4. a bearing; 5. pressing and sleeving a first sleeve; 5a, a first annular step; 5a1, annular sidewall; 5a2, annular bottom wall; 6. pressing a sleeve II; 7. a seal ring; 8. a clamp spring; 9. a guide sleeve; 9a, a guide ring; 10. and (6) pressing the cap.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1 and 2, in the multi-stage steam trap rotor guide mechanism, the steam trap includes a pump casing 1 and a tail cover 2 fixed outside the pump casing 1, wherein the tail cover 2 is composed of a barrel-shaped main body 2a and a ring body 2b fixed in the main body 2a, the opening of the main body 2a faces the pump casing 1, and the main body 2a is fixedly connected with the pump casing 1 through a bolt; the ring body 2b and the main body 2a are coaxially arranged, and the ring body 2b is fixedly connected with the main body 2a through bolts.

Specifically, the rotor 3 is horizontally arranged in the pump housing 1, the outer end of the rotor 3 extends out of the pump housing 1 and is positioned in the main body 2a, and the rotor 3 is rotatably connected with the main body 2a through the bearing 4. In the embodiment, a mechanical seal is adopted between the rotor 3 and the pump shell 1 to realize sealing; the bearing 4 is of the rolling bearing type. As shown in fig. 2, a first pressing sleeve 5 and a second pressing sleeve 6 are respectively pressed at two ends of an inner ring of the bearing 4, the first pressing sleeve 5 and the second pressing sleeve 6 are both sleeved and fixed on the rotor 3, and the first pressing sleeve 5 is positioned between the bearing 4 and the pump shell 1; the ring body 2b is sleeved outside the first pressing sleeve 5, and sealing is formed between the ring body 2b and the first pressing sleeve 5 through a sealing ring 7; one end of the ring body 2b is integrally formed with an annular raised head 2b1, the annular raised head 2b1 and the ring body 2b are coaxially arranged, and the annular raised head 2b1 is tightly pressed on the end face of the outer ring of the bearing 4.

Wherein the content of the first and second substances,

the first pressing sleeve 5 is installed in the following mode: the side wall of the rotor 3 is provided with a clamp spring groove for installing a clamp spring 8, the inner wall of one end, away from the bearing 4, of the first pressing sleeve 5 is provided with a second annular step matched with the clamp spring 8, and the outer side of the clamp spring 8 is clamped in the second annular step and tightly pressed on the bottom wall of the second annular step.

The seal ring 7 is mounted as follows: an annular groove coaxial with the annular body 2b is formed in the inner side wall of the annular body 2b, the sealing ring 7 is located in the annular groove, and the inner side wall of the sealing ring 7 abuts against the first pressing sleeve 5. Preferably, there are two annular grooves axially distributed along the ring body 2b, and each annular groove is provided with a sealing ring 7 as described above.

As shown in fig. 2 and 3, the guiding mechanism includes a guide sleeve 9 sleeved outside the first pressing sleeve 5, and the guide sleeve 9 and the rotor 3 are coaxially arranged. The ring body 2b is provided with an annular guide groove 2b2 coaxial with the rotor 3, the outer wall of the guide sleeve 9 is provided with a guide ring 9a coaxial with the guide ring, the shape and the size of the guide ring 9a are matched with those of the annular guide groove 2b2, and the guide ring 9a is inserted in the annular guide groove 2b 2. An annular step I5 a is formed in the outer wall of the first pressing sleeve 5, and the annular step and the first pressing sleeve 5 are coaxial. The annular step one 5a is constituted by the annular side wall 5a1 and the annular bottom wall 5a2, and the annular bottom wall 5a2 is located between the annular side wall 5a1 and the bearing 4. The annular side wall 5a1 is screwed with a pressure cap 10, the guide sleeve 9 is positioned in the annular step I5 a, and two end faces of the guide sleeve 9 are respectively in close contact with the pressure cap 10 and the annular bottom wall 5a 2. The guide sleeve 9 is clamped between the pressing cap 10 and the annular bottom wall 5a2 to realize positioning, so that when in actual assembly, the guide sleeve 9 can be fixed only by screwing the pressing cap 10, the installation is convenient, and meanwhile, the pressing cap 10 and the pressing sleeve I5 are meshed by threads to form large friction so as to effectively strengthen the strength of the locking guide sleeve 9, so that the structure of the guide mechanism is stable, and the stable work of the guide mechanism is ensured.

Further, the axial section of the annular guide groove 2b2 is substantially trapezoidal, the annular guide groove 2b2 is composed of two groove side walls and a groove bottom wall located between the two groove side walls, an included angle formed between the groove side walls and the groove bottom wall is an obtuse angle, and the axial section of the guide ring 9a is trapezoidal matched with the annular guide groove 2b2, so as to better guide the rotation of the rotor 3.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A multistage rotor guide mechanism of a drainage pump comprises a pump shell (1) and a tail cover (2) fixed outside the pump shell (1), wherein the rotor (3) is horizontally arranged in the pump shell (1), the outer end of the rotor (3) extends out of the pump shell (1) and is positioned in the tail cover (2), the rotor (3) is rotatably connected with the tail cover (2) through a bearing (4), two ends of an inner ring of the bearing (4) are respectively tightly pressed with a first pressing sleeve (5) and a second pressing sleeve (6), the first pressing sleeve (5) and the second pressing sleeve (6) are both sleeved and fixed on the rotor (3), the first pressing sleeve (5) is positioned between the bearing (4) and the pump shell (1), the guide mechanism comprises a guide sleeve (9) sleeved outside the first pressing sleeve (5), an annular guide groove (2b2) coaxial with the rotor (3) is arranged in the tail cover (2), a guide ring (9a) is arranged on the outer wall of the guide sleeve (9), and the guide ring (9a) is inserted into an annular guide groove (2b2), the pressure sleeve is characterized in that an annular step I (5a) is formed in the outer wall of the pressure sleeve I (5), the annular step I (5a) is composed of an annular side wall (5a1) and an annular bottom wall (5a2), the annular bottom wall (5a2) is located between the annular side wall (5a1) and the bearing (4), a pressure cap (10) is connected to the annular side wall (5a1) in a threaded mode, the guide sleeve (9) is located in the annular step I (5a), and two end faces of the guide sleeve (9) are respectively in close contact with the pressure cap (10) and the annular bottom wall (5a 2).

2. The multi-stage hydrophobic pump rotor guide mechanism according to claim 1, wherein the annular guide groove (2b2) has a substantially trapezoidal axial cross-section, said annular guide groove (2b2) is formed by two groove side walls and a groove bottom wall located between the two groove side walls, and the included angle formed between the groove side walls and the groove bottom wall is an obtuse angle, and the axial cross-section of said guide ring (9a) has a trapezoidal shape matching the annular guide groove (2b 2).

3. The multistage hydrophobic pump rotor guide mechanism of claim 1 or 2, wherein the side wall of the rotor (3) is provided with a clamp spring groove for installing a clamp spring (8), the inner wall of one end of the first pressing sleeve (5) far away from the bearing (4) is provided with a second annular step matched with the clamp spring (8), and the outer side of the clamp spring (8) is clamped in the second annular step and tightly pressed on the bottom wall of the second annular step.

4. The multi-stage hydrophobic pump rotor guiding mechanism of claim 1 or 2, characterized in that the tail cover (2) is composed of a barrel-shaped main body (2a) fixedly connected with the pump casing (1) and a ring body (2b) fixed in the main body (2a), the ring body (2b) is sleeved outside the first pressing sleeve (5), the annular guide groove (2b2) is arranged on the ring body (2b), and a seal is formed between the ring body (2b) and the first pressing sleeve (5) through a seal ring (7).

5. The multi-stage hydrophobic pump rotor guiding mechanism of claim 4, characterized in that the annular raised head (2b1) is integrally formed at one end of the ring body (2b), the annular raised head (2b1) and the ring body (2b) are coaxially arranged, and the annular raised head (2b1) is tightly pressed on the end face of the outer ring of the bearing (4).

6. The multistage hydrophobic pump rotor guiding mechanism as defined in claim 4, wherein the inner side wall of the ring body (2b) is provided with an annular groove coaxial therewith, the sealing ring (7) is located in the annular groove, and the inner side wall of the sealing ring (7) abuts against the first pressing sleeve (5).