CN106907335A - A kind of low-pressure washer circulating pump - Google Patents

Abstract

A low-pressure scrubber circulation pump, including an impeller, the impeller is connected to the left end of the pump shaft and arranged inside the pump casing assembly, the right end of the pump shaft is connected to the motor end through a claw-type elastic coupling; the pump shaft is provided with a matching bearing, The pump shaft and the outer side of the bearing are provided with a bearing housing, the pump housing assembly and the bearing housing are connected through a coupling frame, the right end of the bearing housing is provided with a gland, and the connection between the coupling frame and the pump housing assembly is provided with a packing plate assembly; the bearing housing The frame is installed on the body; the nozzle assembly and the guide pipe assembly are respectively installed on the opposite positions of the pump shaft; the impeller is fastened to the shaft end of the pump shaft; the claw-type elastic coupling assembly connects the pump shaft and the motor shaft , the kinetic energy on the motor is transmitted to the main shaft, and the elastic coupling can buffer and absorb vibration, and the motor transmits the kinetic energy to the pump shaft, thereby driving the impeller to rotate; the invention has the characteristics of improving its sealing performance and prolonging the service life of the circulating pump.

Description

A low-pressure scrubber circulation pump

technical field

The invention relates to the technical field of circulating pumps, in particular to a circulating pump for a low-pressure scrubber.

Background technique

The circulation pump is a pump for circulating liquid in the device for conveying reaction, absorption, separation, and regeneration of absorption liquid. Generally, a single-stage centrifugal pump is used. The purpose of circulating pumps is to effectively utilize production resources. Energy conservation and emission reduction has become the main content of China's economic development plan, especially for high energy-consuming enterprises in the fields of electric power, steel, non-ferrous metals, petrochemicals, and water treatment. Therefore, the improvement and development of circulating pumps are beneficial to today's industrial production and have great significance for industrial production. For example, the heating and hot water circulation pumps currently used.

During the use of the circulating pump, since the circulating pump is continuously in a high-temperature working state, the sealing system of the circulating pump will be worn out after long-term use, and failures such as oil leakage will occur. As the heart of the entire circulatory system, the circulation pump must maintain the continuity and reliability of its work.

Contents of the invention

In order to overcome the deficiencies of the prior art, the present invention provides a low-pressure scrubber circulation pump, which can make the structure simple and reasonable, make installation, maintenance, and replacement of parts easy and convenient; it has the characteristics of improving its sealing performance and prolonging the service life of the circulation pump.

In order to achieve the above object, the present invention is achieved through the following technical solutions:

A low-pressure washer circulation pump, comprising an impeller 2, the impeller 2 is connected to the left end of the pump shaft 18 and arranged inside the pump casing assembly 1, and the right end of the pump shaft 18 is connected to the motor end through a claw-type elastic coupling 20; the pump The shaft 18 is provided with a bearing 22 matching it, and the pump shaft 18 and the bearing 22 are provided with a bearing housing 14 outside, the pump housing assembly 1 and the bearing housing 14 are connected through the coupling frame 5, and the right end of the bearing housing 14 is provided with a The gland 16, the connection between the coupling frame 5 and the pump housing assembly 1 is provided with a packing disc assembly 4; a frame 25 is installed on the bearing housing 14;

A shaft sleeve 39 is arranged inside the mechanical seal 6 around the outside of the pump shaft 18 .

The pump shaft 18 is connected with a connecting pipe assembly 31 and a draft tube assembly 36 .

The claw-type elastic coupling assembly 20 includes a motor coupling 58 connected to the motor end, the motor coupling 58 cooperates with the pump end coupling 64 for transmission, and the motor coupling 58 and the pump end coupling 64 are provided with a coupling 61 and a claw coupling 62 connecting the motor end machine and the pump shaft 18 , and an elastic block 63 is provided inside the pump coupling 64 .

A gasket 3 is arranged between the pump casing assembly 1 and the stuffing plate 4 .

The stuffing disc assembly 4 includes a stuffing disc 46, and a ring 47 is arranged inside the stuffing disc 46.

The packing disc assembly 4 at the left end of the shaft 18 is equipped with a mechanical seal assembly 6. The mechanical seal assembly 6 includes a static ring 49 and a moving ring 51. The static ring 49 and the moving ring 51 are perpendicular to the surface of the pump shaft 18 and adhere to each other. A sealing ring 48 is installed on the static ring 49, a sealing ring 50 is arranged inside the moving ring 51, and a sleeve 52 is installed on the sealing ring 50, and the preload of the moving ring 51 is adjusted by the spring 53 and the fixed ring 54. , The fixing ring 54 is set on the shaft 18 by the screw five 55.

The right end of the stuffing disk 4 and the exterior of the mechanical seal 6 are equipped with a static ring seat assembly 8, the static ring seat assembly 8 includes a static ring seat 56, and a pin 57 is arranged inside the static ring seat 56.

The left end of the bearing housing 14 is equipped with a circular gland 30 for sealing and connection, and a gasket 29 is installed between the bearing housing 14 and the circular gland 30 .

A ventilation screw plug 12 is installed on the upper surface of the bearing housing 14 .

A pad 15 is installed between the bearing housing 14 and the gland 16 .

An oil seal 21 is installed around the pump shaft 18 in the gland 16 .

The connecting pipe assembly 31 includes a joint 67 connected with the pump shaft 18 , and the joint 67 is connected with the flange 65 through the pipe 66 .

The guide tube assembly 36 includes a connector 70 connected to the pump casing 44 , and the connector 70 is connected to the liquid outlet of the pump casing through the tube 68 .

An impeller key 43 is fixed between the impeller 2 and the pump shaft 18 .

Beneficial effects of the present invention:

1. The impeller 2 is directly installed on the pump shaft 18, the extension shaft of the motor. The axial dimension is short and the structure is compact. The configuration of the pump shaft 18 and the motor end is reasonable, which can effectively balance the radial and axial loads generated by the pump operation, thereby ensuring The pump runs smoothly, with little vibration and low noise;

2. The liquid outlet in the pump casing can be left, right and upward, which is convenient for pipeline arrangement and installation, and saves space;

3. The shaft seal adopts mechanical seal combination, which has good sealing effect, effectively protects the main shaft and ensures the normal operation of the pump shaft 18;

4. The structure is simple and reasonable, and the installation, maintenance, and replacement of seals and bearings are simple and convenient;

5. Good sealing ensures no leakage in the transportation of different media.

Description of drawings

Figure 1 is a schematic diagram of the structure of a circulation pump for a low-pressure scrubber.

Fig. 2 is a structural schematic diagram of the circulating pump of the low-pressure scrubber in the left half.

Fig. 3 is a structural schematic diagram of the circulation pump of the low-pressure scrubber in the right half.

Fig. 4 is a sectional view along K-K of Fig. 1 .

FIG. 5 is a schematic structural view of the pump casing assembly 1 .

FIG. 6 is a schematic structural view of the impeller 2 .

FIG. 7 is a schematic structural view of the packing pan assembly 4 .

FIG. 8 is a schematic structural view of the mechanical seal assembly 6 .

FIG. 9 is a schematic structural view of the stationary ring seat assembly 8 .

FIG. 10 is a schematic structural view of the bearing housing 14 .

FIG. 11 is a structural schematic diagram of the pump shaft 18 .

Fig. 12 is a schematic structural view of the claw-type elastic coupling assembly.

FIG. 13 is a schematic structural view of the connection assembly 31 .

FIG. 14 is a schematic structural view of the guide tube 36 .

detailed description

The present invention will be described in detail below with reference to the accompanying drawings and examples.

As shown in Figures 1, 2, and 3: a low-pressure washer circulation pump, including an impeller 2, the impeller 2 is connected to the left end of the pump shaft 18 and arranged inside the pump casing assembly 1, and the right end of the pump shaft 18 is passed through a claw-shaped elastic The shaft coupling 20 is connected to the motor end; the pump shaft 18 is provided with a bearing 22 matching it, and the pump shaft 18 and the bearing 22 are provided with a bearing housing 14 outside, and the pump housing assembly 1 and the bearing housing 14 pass through the coupling frame 5 connected, the right end of the bearing housing 14 is provided with a gland 16, the connection between the coupling frame 5 and the pump housing assembly 1 is provided with a packing disc assembly 4; the bearing housing 14 is equipped with a frame 25.

The claw-type elastic coupling assembly 20 includes a motor coupling 58 connected to the motor end, the motor coupling 58 cooperates with the pump end coupling 64 for transmission, and the motor coupling 58 and the pump end coupling 64 are provided with a coupling 61 and a claw coupling 62 connecting the motor end machine and the pump shaft 18 , and an elastic block 63 is provided inside the pump coupling 64 .

Gasket one 3 is installed between the pump casing assembly 1 and the packing disk 4, and its material is asbestos paper, and its main function is to seal between the pump casing 1 and the packing disk 4.

The coupling frame 5, the left end is connected with the pump casing assembly 1, and the right end is connected with the bearing housing 14, which plays the role of connecting and fixing the parts and supporting the parts.

Gasket 2 7 is installed between the packing disc 4 and the static ring seat 8, increasing the supporting area of the connected parts to reduce the pressure at the contact point and avoid scratching the surface of the connected parts when the nut is tightened. On the one hand, it also plays a role of sealing Function to prevent foreign liquid from entering and corroding the parts.

Screw one 9 connects and fixes the packing disc 4, the coupling frame 5 and the static ring seat 8.

Screw two 10, connect and fix coupling frame 5 and bearing housing 14.

Washer 3 11, installed between the circular gland 30 and the bearing housing 14, increases the supporting area of the connected parts to reduce the pressure at the contact point and prevent the surface of the connected parts from being scratched by tightening the nut, and supports and stabilizes the bearing.

The venting screw plug 12 is installed on the bearing housing 14, and mainly plays the role of sealing the screw hole, and the small hole is to maintain the balance of internal and external pressure.

Pad one 15 is installed between the bearing housing 14 and the gland 16. Its material is soft paper tongs, which increases the supporting area of the connected parts to reduce the pressure at the contact point and prevent the surface of the connected parts from being scratched by tightening the nut. It also acts as a seal to prevent foreign liquids from entering.

The gland 16 is installed on the right end of the bearing housing 14, plays the role of sealing and connection, and bears the axial load.

The third screw 17 connects and fixes the bearing housing 14 and the gland 16.

The key 19 connects the pump shaft 18 and the pump end coupling 64 and fixes it.

The oil seal 21 is installed in the gland 16 and surrounds the pump shaft 18 to act as a seal to prevent the lubricating oil in the shaft from leaking from the seams.

The bearing 22 is installed inside the bearing housing 14, and its function is to support the pump shaft 18, reduce the friction of the pump shaft 18 in rotation, and play a lubricating role.

Screw 4 23, connects, fixes bearing housing 14 and frame 25.

Washer four 24, is installed between screw four 23 and frame 25, increases the supporting area of connected parts (bearing housing and frame) to reduce the pressure of contact and avoid tightening the nut to scratch the surface of connected parts.

Frame 25 plays the role of supporting the body and stabilizes the machine.

The oil mark shows screw plug 26, is installed on the bearing shell 14, and lubricating oil is housed in the bearing shell, is installed on the bearing shell and is used for observing oil level.

Pad 2 27 is installed between the sleeve shell 14 and the plug 28, which increases the supporting area of the connected parts to reduce the pressure at the contact point and prevents the surface of the connected parts from being scratched by tightening the nuts. On the one hand, it also plays a role of sealing effect.

Plug 28, installed on the bearing housing 14, plays the role of sealing.

Pad three 29, installed between the bearing housing 14 and the circular gland 30, increase the supporting area of the connected parts to reduce the pressure at the contact and avoid tightening the nuts to scratch the surface of the connected parts, and also play a role in sealing.

The circular gland 30 is installed on the left end of the bearing housing 14, plays the role of sealing and connection, and bears the axial load.

Bolts 32 are used together with nuts 33 to connect and fix the pump casing assembly 1 and the coupling frame 5 .

The pin 34 has the functions of positioning and fastening parts.

The pipe joint 35 is a connecting piece between pipes, and is a detachable connection point between pipes and components, and is connected with the guide pipe 36 .

Pad 4 37 is installed between the screw plug 38 and the pump casing 1, and is used in conjunction with the screw plug 38 to increase the supporting area of the connected piece to reduce the pressure at the contact point and avoid scratching the surface of the connected piece when tightening the nut. Played the role of sealing.

Screw plug 38 plays the role of sealing.

The shaft sleeve 39 is installed inside the mechanical seal 6, around the pump shaft 18, directly cooperates with the pump shaft 18, separates the pump shaft from the packing and other parts, and its outer side rubs against the packing and other parts, thereby protecting the pump shaft from rotating. Abraded, the axle sleeve 39 can be replaced after being worn to a certain extent, which is much lower than the cost of changing the main shaft.

Pad five 40 plays the role of sealing and completes the cooperation between the pump shaft 18 and the shaft sleeve 39.

The impeller nut 41 fastens the impeller 2 to the pump shaft end.

Pad 6 42, installed between the impeller 2 and the impeller nut 41, increases the supporting area of the connected parts to reduce the pressure at the contact point and prevent the surface of the connected parts from being scratched by tightening the nuts. On the one hand, it also plays a role of sealing. Prevent liquid from entering the pump shaft 18 clearance.

The impeller key 43 connects the impeller 2 and the pump shaft 18, and fixes the impeller on the pump shaft.

As shown in Figure 5 and Figure 1: the pump casing assembly 1 is composed of a pump casing 44 and a wear-resistant ring 45. The main function of the pump casing 44 is to connect the liquid suction port and the liquid discharge port, lead the liquid to the impeller 2, and collect it from the impeller 2. The liquid flowing out converts most of the kinetic energy of the liquid into pressure energy, and at the same time, it also plays a role in connecting other parts and supports; the main function of the wear ring 45 is to connect the rotating and stationary parts in the pump casing 44, that is, The pump casing 44 is separated from the impeller 2, and the high pressure and low pressure parts.

As shown in Figure 6 and Figure 1: the impeller 2 is installed on the left end of the pump shaft 18 and inside the pump casing assembly 1. It is composed of five curved blades. Liquid, to increase the static pressure energy and kinetic energy of the liquid (mainly increase the static pressure energy).

As shown in Figure 7 and Figure 1: the packing disc assembly 4 is installed between the pump casing 1 and the coupling frame 5. The packing disc assembly 4 is composed of a packing disc 46 and a ring 47. The packing disc assembly 4 is sealed by packing. Principle, the main function is to play a sealing role.

As shown in Figure 8 and Figure 1: the mechanical seal assembly 6 is installed in the packing disc 4 at the left end of the shaft 18. The mechanical seal assembly 6 is composed of a seal ring 48, a static ring 49, a seal ring 50, a moving ring 51, a sleeve 52, The spring 53, the fixing ring 54, and the screw 55 are composed; the mechanical seal assembly 6 is set on the pump shaft 18, and plays a role of sealing between the pump shaft 18 and the mechanical parts. The mechanical seal assembly 6 is a sealing device composed of two sealing elements (stationary ring 49 and moving ring 51 ) that are perpendicular to the smooth and flat surfaces of the pump shaft 18 and are made to rotate relative to each other. It relies on the pressure of the elastic member, that is, the spring 53 and the sealing medium to generate an appropriate pressing force on the contact surface (end surface) of the rotating movable ring 51 and the static ring 49, so that the two end surfaces are closely fitted. A very thin liquid film is maintained between the end faces to achieve the purpose of sealing. This liquid film has hydrodynamic pressure and static pressure, and plays the role of lubrication and sealing.

As shown in Figure 9 and Figure 1: the static ring seat assembly 8 is installed on the right end of the packing plate 4, outside the mechanical seal 6, the static ring seat assembly 8 is composed of a static ring seat 56 and a pin 57, the static ring seat combination The effect of part 8 is to cooperate with mechanical seal 6, and stationary ring seat 56 has certain expansion performance, and pin 57 prevents that stationary ring 49 in the mechanical seal rotates circumferentially.

As shown in Figure 10 and Figure 1: the bearing housing 14 is installed between the coupling frame 5 and the gland 16, and its function is to support the bearing 22, fix the outer ring of the bearing 22, and only allow the inner ring to rotate, while the outer ring remains It does not move, and is consistent with the direction of transmission all the time, while allowing the bearing 22 to cooperate better with the pump shaft 18.

As shown in Figure 11 and Figure 1: the pump shaft 18, the left end is connected to the impeller 2, and the right end is connected to the claw-shaped elastic coupling 20. The function of the pump shaft 18 is mainly to transmit power and support the impeller 2 to maintain normal operation. Coupling 20 links to each other with motor end, and the other end supports impeller 2 and makes rotational movement, and parts such as bearing 22, axial seal (mechanical seal 6, axle sleeve 39 etc.) are housed on the shaft.

As shown in Figure 12 and Figure 1: the claw-type elastic coupling assembly 20, the left end is connected to the pump shaft 18, and the right end is connected to the motor end. The claw-type elastic coupling assembly 20 is composed of a motor coupling 58 and a set screw 59 , screws 60, connectors 61, claw-type connectors 62, elastic blocks 63, and pump end couplings 64; the main function of the claw-type elastic coupling assembly 20 is to connect the driven shaft and the driving shaft and transmit The torque transmits the kinetic energy on the motor to the main shaft 18, and the elastic block 63 can buffer and absorb vibration, compensate for a large axial displacement, a small amount of radial displacement and angular displacement, and ensure the stable operation of the machine. The motor coupling 58 is used to connect the motor end and cooperate with the pump end coupling 64 for transmission between them; the set screw 59 is used to fix the relative position between the motor coupling 58 and the motor; the screw 60 , the function is to connect and fix the motor coupling 58 and the coupling piece 61; the coupling piece 61 and the claw type coupling piece 62 are used to connect the motor end machine and the pump shaft 18 for transmission between them; the elastic block 63 is used for buffering Absorbing vibration, compensating for large axial displacement, small radial displacement and angular displacement; pump end coupling 64 is used to connect pump shaft 18 and cooperate with motor coupling 58 for transmission between them.

As shown in Figure 13 and Figure 1: the connecting pipe assembly 31 is composed of a flange 65, a pipe 66, and a joint 67, and the external pipe fittings, wherein the role of the flange 65 is to connect the pipes to the pipes and connect them to the pipe ends. , fix and seal the connection of the pipe fittings; the function of the pipe 66 is to drain the liquid; the joint 67 plays the role of connection.

As shown in Fig. 14 and Fig. 1: the diversion pipe assembly 36, the diversion pipe assembly is composed of a pipe 68, a nut 69, and a joint 70, the pipe 68 is used for diversion, and the function of the nut 69 is to fasten the pipe joint 35, the joint 70 plays the role of connecting elements or pipe fittings.

The claw-type elastic coupling assembly 20 used is composed of two claw-shaped bushings (couplings at both ends), which are staggered by half a tooth pitch in the circumferential direction, and a prestressed elastic block 63 is installed in between, which can ensure Forward and reverse transmission without backlash, accurate positioning. The claw coupling with the middle elastic block 63 can reduce vibration and achieve a perfect balance between stiffness and vibration reduction.

Working principle of the present invention:

The impeller 2 is fastened to the shaft end of the pump shaft 18 and installed in the pump casing 1; the claw-shaped elastic coupling assembly 20 connects the pump shaft 18 with the motor shaft, and the main function of the coupling is to connect the driven shaft and the motor shaft. The drive shaft transmits torque, and transmits the kinetic energy on the motor to the main shaft 18, and the elastic coupling 20 can buffer and absorb vibration, compensate for large axial displacement, small radial displacement and angular displacement, and ensure the stable operation of the machine.

The motor transmits kinetic energy to the pump shaft 18, thereby driving the impeller 2 to rotate. The impeller 2 is driven by the pump shaft 18 to rotate at a high speed, and the liquid between the impeller 2 must also rotate accordingly. Under the action of centrifugal force, the liquid is thrown from the center of the impeller 2 to the outer edge and gains energy, leaving the outer edge of the impeller and entering the pump casing assembly 1 at a high speed. In the pump casing assembly 1, the liquid decelerates due to the gradual expansion of the flow channel, and converts part of the kinetic energy into static pressure energy, and finally flows into the discharge pipe at a higher pressure. When the liquid flows from the center of the impeller 2 to the outer edge, a certain vacuum is formed in the center of the impeller 2. Since the pressure above the liquid level of the storage tank is greater than the pressure at the liquid inlet, the liquid is continuously pressed into the impeller 2. Therefore, as long as the impeller 2 Continuously rotating, the liquid will be continuously sucked and discharged; when the liquid is discharged, the liquid can be divided through the guide tube 36 .

Claims (10)

1. a kind of low-pressure washer circulating pump, including impeller (2), it is characterised in that described impeller (2) and pump shaft (18) left end It is connected and is arranged on pump case component (1) internal, pump shaft (18) right-hand member is connected by claw type yielding coupling (20) with motor side；Pump The bearing (22) coordinated with it is provided with axle (18), described pump shaft (18) is provided with bear box with bearing (22) outside (14), pump case component (1) is connected with bear box (14) by hitch (5), and bear box (14) right-hand member is provided with gland (16), described hitch (5) is provided with packing box sub-assembly (4) with the junction of pump case component (1)；On bear box (14) Organic frame (25) is installed；

Described is provided with axle sleeve (39) around pump shaft (18) outside；

Adapter sub-assembly (31) and mozzle sub-assembly (36) are connected with described pump shaft (18).

2. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described claw type yielding coupling Sub-assembly (20) includes the motor coupling (58) that is connected with motor side, and motor coupling (58) coordinates with pump end shaft coupling (64) It is driven and the half tooth that mutually staggers in a circumferential direction is away from therebetween equipped with a prestressing force elastomer block (63), motor coupling (58) connector (61) and claw type connector for being connected motor side and pump shaft (18) are provided between pump end shaft coupling (64) (62)。

3. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described axle (18) left end is filled out Mechanical seal combined part (6) is installed in charging tray sub-assembly (4), mechanical seal combined part (6) includes stationary ring (49) and rotating ring (51), stationary ring (49) and rotating ring (51) are bonded to each other perpendicular to pump shaft (18) surface, and sealing ring (48) is provided with stationary ring (49), Rotating ring (51) is internally provided with sealing ring (50), and set (52) is provided with sealing ring (50), and described rotating ring (51) is by spring (53) regulation of pretightning force is carried out with retainer ring (54), retainer ring (54) is arranged on pump shaft (18) by screw five (55).

4. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described packing box (4) right-hand member Stationary ring seat combined piece (8) is installed with outside mechanical seal (6), described stationary ring seat combined piece (8) includes stationary seat (56), quiet Ring seat (56) is internally provided with pin (57).

5. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described bear box (14) is left End has been provided with the round gland (30) of sealing and connection function, is provided between described bear box (14) and circle gland (30) Pad three (29).

6. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that on described bear box (14) Surface is provided with ventilative screw plug (12), and pad one (15) is provided between described bear box (14) and gland (16).

7. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that surround in described gland (16) Pump shaft (18) is provided with oil sealing (21).

8. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described adapter sub-assembly (31) Including the joint (67) being connected with pump shaft (18), joint (67) is connected by managing (66) with ring flange (65),

Described mozzle sub-assembly (36) includes the joint (70) that is connected with pump case (44), and joint (70) is by managing (68) and pump Shell liquid outlet is connected.

9. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described impeller (2) and pump shaft (18) impeller key (43) is fixed between.

10. a kind of low-pressure washer circulating pump according to claim 1, it is characterised in that described pump case component (1) and Packing ring one (3) is provided between packing box (4), described packing box sub-assembly (4) includes packing box (46), in packing box (46) It is provided with ring (47).