CN218439736U

CN218439736U - Screw pump

Info

Publication number: CN218439736U
Application number: CN202222701348.6U
Authority: CN
Inventors: 杨耀峰; 李阳; 杨宇飞; 张德学
Original assignee: Guangdong Standard Fluid Systems Co ltd
Current assignee: Guangdong Standard Fluid Systems Co ltd
Priority date: 2022-10-13
Filing date: 2022-10-13
Publication date: 2023-02-03
Anticipated expiration: 2032-10-13

Abstract

The utility model discloses a novel screw pump, it includes: a drive device connected with a transmission shaft; the suction chamber is connected with a stator, a rotor which is in spiral fit with the stator is arranged in the suction chamber, a transmission shaft extends to the suction chamber, and a connecting part is connected between the transmission shaft and the rotor; the bearing frame, it is connected between drive arrangement and suction chamber, and the inside of bearing frame disposes standard seal assembly, prevents leaking the oil blanket and is located the bearing of standard seal assembly both sides respectively, prevents leaking the oil blanket and is close to in the suction chamber, and standard seal assembly, bearing and prevent leaking the oil blanket and all overlap and establish outside the transmission shaft. The utility model discloses establish standard seal assembly in the bearing frame and lie in between two bearings for standard seal assembly can utilize the transmission shaft to come the runout or the circle of control transmission shaft with the cooperation of bearing to beat under the leading effect of bearing, with the runout or the circle of effectively reducing the transmission shaft in standard seal assembly department beat, thereby extension standard seal assembly's life.

Description

Screw pump

Technical Field

The utility model relates to a screw pump technical field, in particular to novel screw pump.

Background

In the existing screw pump, a sealing chamber and a bearing seat are generally arranged between a suction chamber and a motor, and the sealing chamber is close to the suction chamber so as to prevent a medium in the suction chamber from leaking and overflowing or reaching the motor to damage the motor.

The existing sealing chamber is generally divided into a standard sealing component and a packing sealing component, wherein the standard sealing component is a combination of a framework oil seal and a sealing ring, and the packing sealing component is a combination of a gland and a packing. For a standard seal assembly, the use conditions are more severe compared with those of a packing seal assembly, namely, the shaft fittings are not allowed to generate radial run-out or circular run-out, and if the radial run-out or the circular run-out occurs, the seal ring is deformed, so that the service life of the seal ring is influenced.

In the conventional installation method of the seal chamber, because the bearing is positioned on one side of the seal chamber, the transmission shaft inevitably generates radial run-out or circular run-out, and therefore, in the conventional screw pump, the seal chamber generally adopts a packing seal assembly. When the screw pump adopting the packing sealing assembly leaks, the packing sealing assembly can achieve the sealing effect again by adjusting the locking gland. However, the stuffing seal assembly is not well suited for high pressure screw pumps because it is prone to leakage of the medium after a period of use.

SUMMERY OF THE UTILITY MODEL

The present invention aims to provide a novel screw pump to solve one or more technical problems existing in the prior art and to provide at least one of a useful choice and creation conditions.

According to the utility model discloses a novel screw pump of first aspect embodiment, include:

a drive device connected with a transmission shaft;

the transmission shaft extends to the suction chamber, and a connecting part is connected between the transmission shaft and the rotor;

the bearing frame, its connection be in drive arrangement with between the suction chamber, the inside of bearing frame disposes standard seal assembly, prevents leaking the oil blanket and is located respectively the bearing of standard seal assembly both sides, prevent leaking the oil blanket and be close to in the suction chamber, standard seal assembly, bearing and prevent that the oil blanket of leaking is all established outside the transmission shaft.

According to the utility model discloses novel screw pump has following beneficial effect at least: prevent letting out the oil blanket and be used for the protection the bearing, in order to avoid the bearing with the interior medium direct contact of suction chamber, and standard seal assembly then is used for preventing that the medium from overflowing extremely drive arrangement, in order to avoid drive arrangement is impaired, compares in prior art, the utility model discloses will standard seal assembly establishes in the bearing frame and be located two between the bearing, make standard seal assembly can under the leading effect of bearing, utilize the transmission shaft with the cooperation of bearing is controlled the runout or the circle of transmission shaft and is beated, in order effectively to reduce the transmission shaft is in the runout or the circle of standard seal assembly department are beated, thereby prolong standard seal assembly's life. The utility model is suitable for a screw pump of high pressure.

According to the utility model discloses a some embodiments, in order to prescribe a limit to standard seal assembly's position, be equipped with first retaining ring in the bearing frame, standard seal assembly with be close to drive arrangement the bearing is located respectively the both sides of first retaining ring. When the anti-leakage oil seal bears pressure, the anti-leakage oil seal can sequentially transmit the pressure to the bearing close to the suction chamber and the standard sealing assembly so as to realize the sealing of the medium in the suction chamber.

According to the utility model discloses a some embodiments, in order to inject the position of bearing, be equipped with two draw-in grooves, every in the bearing frame the jump ring is all installed to the draw-in groove, the bearing is located the jump ring with between the standard seal assembly, this moment the bearing is located the inboard of jump ring, the leakage-proof oil blanket is located the outside of jump ring.

According to some embodiments of the utility model, standard seal assembly includes seal chamber, sealed oil blanket and sealing washer, sealed oil blanket is located the inside of seal chamber, the sealing washer is located the outside of seal chamber. The sealing oil seal and the sealing ring are jointly used for preventing the medium in the suction chamber from overflowing to the driving device.

According to the utility model discloses a some embodiments, be equipped with the second retaining ring in the seal chamber, the quantity of sealing oil blanket is two, two sealing oil blanket is located respectively the both sides of second retaining ring to inject two sealing oil blanket's relative position.

According to the utility model discloses a some embodiments, in order to inject the position of sealing washer, the sealing washer is equipped with the holding tank outward, the sealing washer is located in the holding tank.

According to some embodiments of the invention, the bearing is a thrust bearing, since the bearing is acted on by an axial force.

According to some embodiments of the utility model, because motor or gear motor can realize the rotation of transmission shaft, consequently drive arrangement is motor or gear motor.

According to some embodiments of the utility model, because universal joint pole can realize the transmission shaft with the planetary motion of rotor, consequently connecting portion are flexible pole or universal joint pole.

According to some embodiments of the present invention, the novel screw pump further comprises an ejector connected to the end of the stator, the ejector being remote from the suction chamber. The discharge body may be assembled with an external component so that the medium in the suction chamber can be delivered to a designated place.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic perspective view of a novel screw pump according to an embodiment of the present invention;

FIG. 2 is a top plan view of the novel screw pump shown in FIG. 1;

FIG. 3 isbase:Sub>A cross-sectional view of the novel progressive cavity pump of FIG. 2 taken along line A-A;

figure 4 is an enlarged fragmentary view at a of the novel screw pump shown in figure 3.

In the drawings: 100-driving device, 200-bearing seat, 300-suction chamber, 400-stator, 500-discharger, 600-transmission shaft, 310-feed inlet, 700-rotor, 800-connecting part, 510-discharge port, 210-standard sealing component, 220-leakage-proof oil seal, 230-bearing, 240-clamping groove, 241-clamping spring, 250-first retainer ring, 211-sealing chamber, 212-sealing ring, 213-sealing oil seal, 214-second retainer ring and 215-holding tank.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

As shown in fig. 1 to 3, the novel screw pump according to the embodiment of the first aspect of the present invention includes a driving device 100, a bearing seat 200, a suction chamber 300, a stator 400, and a discharge body 500, wherein the driving device 100, the bearing seat 200, the suction chamber 300, the stator 400, and the discharge body 500 are sequentially connected from back to front, the driving device 100 may be selected as a reduction motor or a motor, when the viscosity of a medium is low, the driving device 100 may be selected as a motor to improve the efficiency of medium transportation, and when the viscosity of a medium is moderately high, the driving device 100 may be selected as a reduction motor to provide a larger torque to ensure the transportation of the medium. But in any case, the drive means 100 is preferably a reduction motor in order to increase the applicability of the screw pump.

A transmission shaft 600 is connected to the driving device 100, the transmission shaft 600 is driven by the driving device 100 to rotate, and the transmission shaft 600 passes through the bearing housing 200 and extends into the suction chamber 300. The suction chamber 300 is connected between the bearing housing 200 and the stator 400, the suction chamber 300 is provided with a feed inlet 310, the feed inlet 310 allows an external medium to enter into the suction chamber 300, a rotor 700 is arranged in the suction chamber 300, the rotor 700 extends into the stator 400, the rotor 700 and the transmission shaft 600 are flexibly connected through a connection part 800, in view of the motion relationship between the rotor 700 and the stator 400, the connection part 800 can be selected as a universal connection rod or a flexible rod, and is used for realizing the planetary motion between the rotor 700 and the transmission shaft 600, so that the rotor 700 can perform a spiral motion around the stator 400, and the medium in the suction chamber 300 is spirally pushed to the outlet of the stator 400 in multiple stages.

The end of the stator 400 is connected with the discharging body 500, the discharging body 500 is provided with a discharging hole 510 communicated with the outlet of the stator 400, the rotor 700 is in spiral fit with the stator 400, that is, the rotor 700 can perform spiral motion around the stator 400 under the driving of the driving device 100, so as to spirally push the medium in the suction chamber 300 to the discharging hole 510 of the discharging body 500, the discharging body 500 can be assembled with an external component, so that after the driving device 100 is started, the medium in the suction chamber 300 can be conveyed to a specified place under the spiral pushing of the rotor 700 and the stator 400.

In addition, a standard seal assembly 210, a leakage-proof oil seal 220 and two bearings 230 are installed inside the bearing housing 200, the two bearings 230 are respectively located at both sides of the standard seal assembly 210, and the leakage-proof oil seal 220 is located at one end of the bearing housing 200 close to the suction chamber 300. Since the transmission shaft 600 passes through the bearing housing 200, the leakage-proof oil seal 220, the bearing 230 and the standard seal assembly 210 are all sleeved outside the transmission shaft 600.

The leakage-proof oil seal 220 serves to protect the bearing 230 from direct contact between the bearing 230 and the medium in the suction chamber 300, and the standard seal assembly 210 serves to prevent the medium from overflowing to the driving device 100 to damage the driving device 100. The utility model discloses will standard seal assembly 210 establishes in bearing frame 200 and be located two between the bearing 230, make standard seal assembly 210 can under the leading effect of bearing 230, utilize the transmission shaft 600 with the cooperation of bearing 230 is controlled transmission shaft 600's runout or circle and is beated, in order effectively to reduce transmission shaft 600 is in the runout or the circle of standard seal assembly 210 department are beated, thereby prolong standard seal assembly 210's life.

It should be noted that, since the assembly of the present invention is more complicated than the assembly of the prior art, it is preferable for the screw pump with low pressure to be sealed by the packing seal assembly, i.e. the gland and the packing, and for the screw pump with high pressure to be sealed by the bearing seat 200.

As shown in fig. 3 and 4, specifically, in order to define the positions of other components in the bearing seat 200, clamping grooves 240 are respectively formed in the interior of the bearing seat 200 at positions close to both ends thereof, each clamping groove 240 is used for mounting a clamp spring 241, at this time, the standard seal assembly 210 and the two bearings 230 are located between the two clamp springs 241, that is, the standard seal assembly 210 and the two bearings 230 are located inside the clamp springs 241, while the leakage-proof oil seal 220 is located outside the clamp springs 241, and the outside of the clamp springs 241 refers to the outside of a space formed by the two clamp springs 241.

Meanwhile, a first retainer ring 250 is arranged inside the bearing seat 200, the inner dimension of the first retainer ring 250 is smaller than that of the bearing seat 200, the first retainer ring 250 is located between the two clamping grooves 240, the bearing 230 and the standard seal assembly 210 close to the driving device 100 are respectively located on two sides of the first retainer ring 250, at this time, the bearing 230 close to the driving device 100 abuts against the first retainer ring 250 under the compression of the corresponding clamping spring 241, and the bearing 230 close to the suction chamber 300 abuts against the standard seal assembly 210 under the compression of the clamping spring 241, so that the standard seal assembly 210 is urged to abut against the first retainer ring 250. Since the bearing housing 200 is spaced from the suction chamber 300 by the leakage-proof oil seal 220, the medium in the suction chamber 300 can generate a pressure on the leakage-proof oil seal 220 toward the driving device 100, so that the leakage-proof oil seal 220 can abut against the snap spring 241 near the suction chamber 300. When the leakage-proof oil seal 220 is pressurized, it can transmit the pressure to the bearing 230 and the standard seal assembly 210 close to the suction chamber 300 in sequence to realize the sealing of the medium in the suction chamber 300.

Further, the standard seal module 210 includes a seal chamber 211, a seal ring 212, and a seal oil seal 213, wherein the seal oil seal 213 is disposed inside the seal chamber 211, and the seal ring 212 is disposed outside the seal chamber 211. In this embodiment, the number of the sealing oil seals 213 is two, a second retainer ring 214 is disposed inside the sealing chamber 211, the inner dimension of the second retainer ring 214 is smaller than the inner dimension of the sealing chamber 211, the two sealing oil seals 213 are respectively located at two sides of the second retainer ring 214, and when the standard sealing assembly 210 abuts against the first retainer ring 250, the two sealing oil seals 213 also abut against two sides of the second retainer ring 214 respectively.

In addition, the number of the sealing rings 212 is two, two accommodating grooves 215 are formed on the outer circumferential surface of the sealing chamber 211, and the two sealing rings 212 are respectively disposed in the corresponding accommodating grooves 215. The seal chamber 211 is sealed with the transmission shaft 600 by the seal oil seal 213, and the seal chamber 211 is sealed with the bearing seat 200 by the seal ring 212, so that the seal oil seal 213 and the seal ring 212 can be used together to prevent the medium in the suction chamber 300 from overflowing to the driving device 100. It is to be understood that the number of the seal oil seals 213 and the number of the seal rings 212 may also be one, three, etc., without being limited to the above-described embodiment, and the leakage preventing oil seal 220, the seal oil seal 213, and the seal rings 212 are all rubber members or silicone members to provide good sealing performance.

In some embodiments of the present invention, since the bearing 230 needs to bear the axial thrust, the bearing 230 may be selected as a thrust bearing, specifically, a thrust roller bearing.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims

1. Novel screw pump, its characterized in that includes:

a drive device (100) to which a transmission shaft (600) is connected;

a suction chamber (300) to which a stator (400) is connected, a rotor (700) which is screw-engaged with the stator (400) is provided in the suction chamber (300), the transmission shaft (600) extends to the suction chamber (300), and a connection part (800) is connected between the transmission shaft (600) and the rotor (700);

bearing frame (200), its connection drive arrangement (100) with between suction chamber (300), the inside of bearing frame (200) disposes standard seal assembly (210), prevents leaking oil blanket (220) and is located respectively bearing (230) of standard seal assembly (210) both sides, prevent leaking oil blanket (220) and be close to in suction chamber (300), standard seal assembly (210), bearing (230) and prevent leaking oil blanket (220) and all overlap and establish outside transmission shaft (600).

2. A novel screw pump according to claim 1, wherein: a first retainer ring (250) is arranged in the bearing seat (200), and the standard sealing assembly (210) and the bearing (230) close to the driving device (100) are respectively positioned at two sides of the first retainer ring (250).

3. A new screw pump according to claim 2, wherein: be equipped with two draw-in grooves (240) in bearing frame (200), every jump ring (241) are all installed to draw-in groove (240), bearing (230) are located jump ring (241) with between standard seal assembly (210), prevent leaking oil blanket (220) and be located the outside of jump ring (241).

4. A new screw pump according to any one of claims 1 to 3, wherein: standard seal assembly (210) is including seal chamber (211), sealed oil blanket (213) and sealing washer (212), sealed oil blanket (213) are located the inside of seal chamber (211), sealing washer (212) are located the outside of seal chamber (211).

5. A novel screw pump according to claim 4, wherein: and a second retainer ring (214) is arranged in the sealing chamber (211), the number of the sealing oil seals (213) is two, and the two sealing oil seals (213) are respectively positioned at two sides of the second retainer ring (214).

6. A novel screw pump according to claim 4, wherein: a containing groove (215) is formed outside the sealing chamber (211), and the sealing ring (212) is arranged in the containing groove (215).

7. A novel screw pump according to claim 1, wherein: the bearing (230) is a thrust bearing.

8. A novel screw pump according to claim 1, wherein: the driving device (100) is a motor or a speed reducing motor.

9. A novel screw pump according to claim 1, wherein: the connecting part (800) is a flexible rod or a universal connecting rod.

10. A novel screw pump according to claim 1, wherein: further comprising a discharge body (500), the discharge body (500) being connected to the end of the stator (400), the discharge body (500) being remote from the suction chamber (300).