CN212803563U

CN212803563U - Single screw pump with sealing device

Info

Publication number: CN212803563U
Application number: CN202021166441.6U
Authority: CN
Inventors: 周燮平
Original assignee: Nanjing Northford Mechanical And Electrical Equipment Co ltd
Current assignee: Nanjing Northford Mechanical And Electrical Equipment Co ltd
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-03-26
Anticipated expiration: 2030-06-22

Abstract

The utility model discloses a single screw pump with sealing device, including the suction chamber, the discharge port, the stator, the rotor, first universal joint, the jackshaft, the second universal joint, front end room and transmission shaft, the rotor is arranged in the stator, the jackshaft is connected through first universal joint to the rotor, the jackshaft passes through the second universal joint and connects the transmission shaft, the transmission shaft passes through the bearing and sets up in the front end indoor, be equipped with centrifugal seal structure between front end room and the bearing, the transmission shaft passes through the pneumatic acceleration rate device of coupling joint, pneumatic acceleration rate device passes through the tube coupling connection compression gas station, be equipped with pressure regulating device on the pipeline between pneumatic acceleration rate device and the compression gas station, the utility model discloses have reliable structure, adjust single screw pump rotational speed facility, sealed effectual beneficial effect.

Description

Single screw pump with sealing device

Technical Field

The utility model belongs to the technical field of single-screw pump, more specifically relate to a single-screw pump with sealing device.

Background

In the prior art, the speed increasing of the single-screw pump generally needs to be realized by a high-speed motor, the power span of the high-speed motor is small, and if the single-screw pump needs to realize the adjustment of different rotating speeds, the high-speed motor needs to be realized by the high-speed motors with different rotating speeds, and has high manufacturing cost and higher cost. Therefore, when the single-screw pump needs to tell the operation, the speed is increased by adopting the secondary bearing box, but the bearing box has large volume and needs to be specially equipped with an oil way and cooling equipment to ensure the normal operation.

Meanwhile, in the prior art, when most of single-screw pumps adopt a framework oil seal for sealing, the framework oil seal generates positive pressure through interference fit of rubber outside the pump body and the size of the pump body, friction force is generated through the pressure and the friction coefficient to prevent the framework oil seal from moving, when the positive pressure of a suction chamber of the pump body and the friction coefficient are small, pressure exists in the pump body when a power steering oil pump runs, the pressure is larger than the friction force of the framework oil seal, the framework oil seal can move towards a bearing end until the framework oil seal is attached to a bearing tightly, and the inner ring of the bearing is in a high-speed rotating state to inevitably generate abrasion on the framework oil seal and generate fragment particles to be stuck at the oil lip of the.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a reliable structure, adjust single-screw pump rotational speed convenient, sealed effectual single-screw pump with sealing device.

According to an aspect of the utility model, single screw pump with sealing device includes the suction chamber, the discharge port, the stator, the rotor, first universal joint, the jackshaft, the second universal joint, front end room and transmission shaft, the rotor is arranged in the stator, the jackshaft is connected through first universal joint to the rotor, the jackshaft passes through second universal joint connecting transmission shaft, the transmission shaft passes through the bearing and sets up in the front end room, be equipped with centrifugal seal structure between front end room and the bearing, the transmission shaft passes through the pneumatic acceleration rate device of coupling joint, pneumatic acceleration rate device passes through the tube coupling and connects the compression gas station, be equipped with pressure regulating device on the pipeline between pneumatic acceleration rate device and the compression gas station.

In some embodiments, the pneumatic speed increasing device comprises a housing, an air inlet, a containing cavity, turbine blades, a first bearing, an output shaft and a sealing element, wherein the air inlet is formed in the outer wall of the housing, the turbine blades are arranged on the output shaft, the output shaft is installed in the containing cavity through the first bearing, the containing cavity extends out of one end of the output shaft, the sealing element is arranged between the output shaft and the housing, and the air inlet is connected with a pipeline.

In some embodiments, the sealing element comprises an inner ring, a telescopic side wall, a top ring and a centrifugal pressing part, the telescopic side wall is fixedly connected to the outer circle of the inner ring, the top of the telescopic side wall surrounds the top ring and is provided with a sealed accommodating cavity, a plurality of centrifugal pressing parts are fixed to the outer circumference of the inner ring and are arranged in the accommodating cavity, and the top ring is arc-shaped.

In some embodiments, the centrifugal pressing part comprises a spring and a steel ball, and two ends of the spring are fixedly connected with the inner ring and the steel ball.

In some embodiments, the rotor is coupled to a front end cover via a bearing, the front end cover being coupled to a front cover plate, the front cover plate sealing the rotor centrifugal seal structure within the front end chamber.

In some embodiments, the centrifugal sealing structure is arranged between the bearing and the suction chamber, the centrifugal sealing structure comprises a front positioning disc, a mechanical seal shaft sleeve, a mechanical seal, a static ring seat and a centrifugal sealing element, the centrifugal sealing element and the mechanical seal shaft sleeve are arranged in parallel front and back, the static ring seat is arranged on the outer ring of the mechanical seal shaft sleeve and compresses the mechanical seal on the mechanical seal shaft sleeve, and the front positioning disc fixes the position of the centrifugal sealing element.

In some embodiments, the first bearing is provided in plurality, and the first bearing is an ultra-high precision bearing.

In some embodiments, the air pressure adjusting device comprises a pneumatic adjusting valve, a pressure gauge and a one-way valve, and the one-way valve, the pneumatic adjusting valve and the pressure gauge are sequentially arranged on a pipeline from the compressed air station to the pneumatic speed increasing device.

The utility model has the advantages that: the single-screw pump is directly driven by the pneumatic speed increasing device, so that the rotation speed of the single-screw pump can be conveniently adjusted, the motor drive is replaced, the cost is saved, and no energy consumption is caused; the pneumatic speed increasing device is noiseless, has long service life and can be operated in 24 hours without intermittence and silence; the air pressure of the compressed air is adjusted by the air pressure adjusting device, so that the rotating speed of the pneumatic speed increasing device can be controlled, and further the rotating speed of the single-screw pump can be controlled; the front end chamber is sealed through a centrifugal sealing structure; utilize centrifugal seal spare to make sealed effect better, it is more convenient to install moreover.

Drawings

FIG. 1 is a schematic structural view of a single screw pump with a sealing device according to the present invention;

FIG. 2 is a schematic structural view of the pneumatic speed increasing device of the single-screw pump with the sealing device of the present invention;

FIG. 3 is a schematic structural view of the air pressure adjusting device of the single screw pump with a sealing device according to the present invention;

FIG. 4 is an enlarged view of a portion A of FIG. 1;

fig. 5 is a schematic view of the centrifugal seal of the single screw pump with sealing device according to the present invention.

Detailed Description

The present invention will be further described with reference to the following embodiments.

As shown in fig. 1, single-screw pump with sealing device include suction chamber 1, discharge port 2, stator 3, rotor 4, first universal joint 5, jackshaft 6, second universal joint 7, front end room 8 and transmission shaft 9, in stator 3 was arranged in to rotor 4, rotor 4 connected jackshaft 6 through first universal joint 5, jackshaft 6 passed through second universal joint 7 and connected transmission shaft 9, transmission shaft 9 passes through bearing 10 and sets up in front end room 8, is equipped with centrifugal seal structure 11 between front end room 8 and the bearing 10, pneumatic speed increasing gear 13 is connected through shaft coupling 12 to transmission shaft 9, pneumatic speed increasing gear 13 passes through pipeline 15 and connects compression gas station 14, be equipped with atmospheric pressure adjusting device 16 on the pipeline 15 between pneumatic speed increasing gear 13 and the compression gas station 14. The single-screw pump is directly driven by the pneumatic speed increasing device 13, so that the rotation speed of the single-screw pump can be adjusted conveniently, the motor drive is replaced, the cost is saved, and no energy consumption is caused; the pneumatic speed increasing device 13 has no noise and long service life and can be operated in 24 hours without intermittence and silence; the air pressure of the compressed air is adjusted by the air pressure adjusting device 16, so that the rotating speed of the pneumatic speed increasing device 13 can be controlled, and further the rotating speed of the single-screw pump can be controlled; the front end chamber 8 is sealed by a centrifugal sealing structure 11; the centrifugal sealing element 115 is utilized to ensure better sealing effect and more convenient installation

As shown in fig. 2, the pneumatic speed increasing device 13 includes a housing 131, an air inlet 132, an accommodating cavity 133, turbine blades 134, a first bearing 135, an output shaft 136 and a sealing element 137, the air inlet 132 is disposed on an outer wall of the housing 131, the turbine blades 134 are disposed on the output shaft 136, the output shaft 136 is mounted in the accommodating cavity 133 through the first bearing 135, one end of the output shaft 136 extends out of the accommodating cavity 133, the sealing element 137 is disposed between the output shaft 136 and the housing 131, and the air inlet 132 is connected to the pipeline 15. The first bearing 135 is provided in plural, and the first bearing 135 is the ultra-high precision bearing 10. The standard rotating speed of the pneumatic speed increasing device 13 is 48000rpm and 80000rpm, and the highest rotating speed can reach 30 ten thousand rpm; the operation rotating speed can be adjusted by adjusting the air pressure; the pneumatic speed increasing device 13 is driven by compressed air, a motor is not needed for driving, the cost is saved, and meanwhile, the pneumatic speed increasing device 13 only needs to be driven by the compressed air, so that the pneumatic speed increasing device is safe, simple and reliable; the pneumatic speed increasing device 13 has few rotating parts and small heat, and can be operated in 24 hours without intermittence and silence; generally, when the rotating speed needs to be over 35000 turns after long-time operation, a pneumatic speed increaser is recommended; and utilize the utility model discloses can realize centrifugal pump 235000 and change above rotational speed, and the rotational speed is adjustable. The first bearing 135 adopts an ultrahigh precision bearing 10, the precision reaches more than P4 level, and the bearing is assembled in a pre-tightening way; the runout precision is high, and runout is 0.001 mm.

As shown in fig. 3, the air pressure adjusting device 16 includes a pneumatic adjusting valve 161, a pressure gauge 162, and a check valve 163, and the check valve 163, the pneumatic adjusting valve 161, and the pressure gauge 162 are sequentially provided on the pipeline 15 from the compressed air station 14 to the pneumatic speed increasing device 13. The one-way valve 163 is used to prevent the compressed air from flowing back, and the pneumatic regulating valve 161 and the pressure gauge 162 are used to regulate the air pressure input into the pneumatic speed increasing device 13, so as to regulate the rotation speed of the pneumatic speed increasing device 13, finally control the rotation speed of the centrifugal pump, and use different rotation speed requirements

As shown in fig. 4, the rotor 4 is connected to a front cover 81 via a bearing 10, and the front cover 81 is connected to a front cover plate that seals the centrifugal seal structure 11 of the rotor 4 in the front chamber 8.

The centrifugal sealing structure 11 is arranged between the bearing 10 and the suction chamber 1, the centrifugal sealing structure 11 comprises a front positioning disc 111, a machine seal shaft sleeve 112, a mechanical seal 113, a static ring seat 114 and a centrifugal sealing element 115, the centrifugal sealing element 115 and the machine seal shaft sleeve 112 are arranged in parallel front and back, the static ring seat 114 is arranged on the outer ring of the machine seal shaft sleeve 112, the mechanical seal 113 is pressed on the machine seal shaft sleeve 112 by the static ring seat 114, and the front positioning disc 111 fixes the position of the centrifugal sealing element 115. The effect of sealing by the mechanical seal 113 and the centrifugal seal 115 in the centrifugal seal structure 11 is better, and the effect of sealing by the centrifugal seal 115 after the shaft rotates is better, so the effect of sealing by the mechanical seal 113 is better, the mechanical seal 113 is arranged behind the centrifugal seal 115, the purpose of the mechanical seal 113 is to keep the sealing state when the shaft does not rotate, and after the shaft rotates, the centrifugal seal 115 and the mechanical seal 113 are used at the same time, so the sealing effect is better.

As shown in fig. 5, the sealing member 137 includes an inner ring 1151, a flexible side wall 1152, a top ring 1153 and a centrifugal pressing member 1154, the flexible side wall 1152 is fixedly connected to the outer circle of the inner ring 1151, the top of the flexible side wall 1152 encloses the top ring 1153 and has a sealed accommodating cavity 133, a plurality of centrifugal pressing members 1154 are fixedly arranged on the outer circumference of the inner ring 1151 and are disposed in the accommodating cavity 133, and the top ring 1153 is in the shape of an arc. The centrifugal press-fit component 1154 comprises a spring 1155 and steel balls 1156, and two ends of the spring 1155 are fixedly connected with the inner ring 1151 and the steel balls 1156. When the shaft is static, the telescopic side wall 1152 and the top ring 1153 are used for realizing sealing, after the shaft rotates, the steel balls 1156 tightly push the top ring 1153 under the action of centrifugal force, so that the sealing effect is good, and the installation is convenient. The more centrifugal press parts 1154 of the centrifugal seal 115 are provided, the better the sealing effect.

The utility model has the advantages that: the single-screw pump is directly driven by the pneumatic speed increasing device 13, so that the rotation speed of the single-screw pump can be adjusted conveniently, the motor drive is replaced, the cost is saved, and no energy consumption is caused; the pneumatic speed increasing device 13 has no noise and long service life and can be operated in 24 hours without intermittence and silence; the air pressure of the compressed air is adjusted by the air pressure adjusting device 16, so that the rotating speed of the pneumatic speed increasing device 13 can be controlled, and further the rotating speed of the single-screw pump can be controlled; the front end chamber 8 is sealed by a centrifugal sealing structure 11; the centrifugal seal 115 is used to provide better sealing and easier installation.

The foregoing is only a few embodiments of the present invention, and it should be noted that, for those skilled in the art, other modifications and improvements can be made without departing from the inventive concept of the present invention, and all of them belong to the protection scope of the present invention.

Claims

1. The single-screw pump with the sealing device comprises a suction chamber, a discharge port, a stator, a rotor, a first universal joint, an intermediate shaft, a second universal joint, a front end chamber and a transmission shaft, wherein the rotor is arranged in the stator, the rotor is connected with the intermediate shaft through the first universal joint, the intermediate shaft is connected with the transmission shaft through the second universal joint, and the transmission shaft is arranged in the front end chamber through a bearing.

2. The single-screw pump with the sealing device according to claim 1, wherein the pneumatic speed increasing device comprises a housing, an air inlet, a receiving cavity, turbine blades, a first bearing, an output shaft and a sealing element, the air inlet is arranged on the outer wall of the housing, the turbine blades are arranged on the output shaft, the output shaft is arranged in the receiving cavity through the first bearing, one end of the output shaft extends out of the receiving cavity, the sealing element is arranged between the output shaft and the housing, and the air inlet is connected with a pipeline.

3. The single-screw pump with a sealing device according to claim 2, wherein the sealing element comprises an inner ring, a telescopic side wall, a top ring and a centrifugal pressing part, the telescopic side wall is fixedly connected to the outer circumference of the inner ring, the top of the telescopic side wall surrounds the top ring and is provided with a sealed accommodating cavity, the centrifugal pressing part is fixedly arranged on the outer circumference of the inner ring and is arranged in the accommodating cavity, and the top ring is arc-shaped.

4. The progressive cavity pump with sealing device of claim 3, wherein the centrifugal pressing member includes a spring and a steel ball, and both ends of the spring are fixedly connected with the inner ring and the steel ball.

5. The progressive cavity pump with seal of claim 4 wherein said rotor is coupled by bearings to a front end cap, said front end cap coupled to a front cover plate, said front cover plate sealing the rotor centrifugal seal within the front end chamber.

6. The single-screw pump with a sealing device according to claim 5, wherein the centrifugal sealing structure is arranged between the bearing and the suction chamber, the centrifugal sealing structure comprises a front positioning disc, a mechanical seal sleeve, a mechanical seal, a static ring seat and a centrifugal sealing element, the centrifugal sealing element and the mechanical seal sleeve are arranged in parallel in a front-back direction, the static ring seat is arranged on the outer ring of the mechanical seal sleeve, the static ring seat presses the mechanical seal on the mechanical seal sleeve, and the front positioning disc fixes the position of the centrifugal sealing element.

7. The progressive cavity pump with sealing mechanism of claim 2, wherein the first bearing is provided in plurality, and the first bearing is an ultra-high precision bearing.

8. The single screw pump with sealing device according to claim 1, wherein the air pressure adjusting device comprises a pneumatic adjusting valve, a pressure gauge and a one-way valve, and the one-way valve, the pneumatic adjusting valve and the pressure gauge are arranged on a pipeline from the compressed air station to the pneumatic speed increasing device in sequence.