CN213419358U

CN213419358U - Screw pump with separate chamber

Info

Publication number: CN213419358U
Application number: CN202022175723.9U
Authority: CN
Inventors: 王于祥
Original assignee: Madebao Vacuum Equipment Group Co ltd
Current assignee: Madebao Vacuum Equipment Group Co ltd
Priority date: 2020-09-28
Filing date: 2020-09-28
Publication date: 2021-06-11
Anticipated expiration: 2030-09-28

Abstract

The utility model belongs to the technical field of screw pump equipment, concretely relates to screw pump with separate chamber. It has solved the problem that current screw pump life is low. This screw pump with separate chamber, including the pump case that has the pump chamber, set up the inflow inlet that is linked together with the pump chamber on the pump case, still be equipped with the screw rod in the pump chamber, be connected with the bearing frame on the pump case, be equipped with the bearing of connecting the screw rod on the bearing frame, its characterized in that, be equipped with on the bearing frame and separate the chamber with bearing and pump chamber spaced apart, separate the chamber and be located between bearing and the pump chamber and communicate with outside atmosphere. The utility model discloses a screw pump life's promotion.

Description

Screw pump with separate chamber

Technical Field

The utility model belongs to the technical field of screw pump equipment, concretely relates to screw pump with separate chamber.

Background

The screw pump is an air pumping device which utilizes a pair of screws to perform air suction and air exhaust functions by synchronous high-speed reverse rotation in a pump shell.

Screw rod both ends in the screw pump can erect on the bearing frame, the bearing frame links firmly on the pump case, carry out the exhaust in-process of pressure boost at the screw pump, the air inlet on the pump case is breathed in toward the pump intracavity, carry out the pressure boost to the pump intracavity, set up gas outlet output high-pressure gas on the pump case, pressure in this in-process pump case is greater than outside atmospheric pressure, can lead to high-pressure gas to get into in the bearing frame, make the emollient oxidation in the bearing frame, lead to the life of bearing emollient to shorten, influence the life of screw pump.

To address this problem, a seal is typically provided between the bearing housing and the pump chamber. For example, chinese patent application No. 201910217741.8 proposes a multistage roots vacuum pump which prevents high-pressure gas in a pump chamber from affecting a bearing by providing a seal assembly between the bearing and the pump chamber. However, the conventional sealing assembly arranged between the bearing and the pump cavity generally has parts such as rubber rings, which are also aged along with the increase of the service time, so that the sealing effect is reduced.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a screw pump with separate chamber, the utility model aims to solve the technical problem that: how to avoid the gas in the pump chamber to cause the influence to bearing lubricant, promote the life of screw pump.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a screw pump with separate chamber, includes the pump case that has the pump chamber, sets up the inflow inlet that is linked together with the pump chamber on the pump case, still is equipped with the screw rod in the pump chamber, is connected with the bearing frame on the pump case, is equipped with the bearing of connecting the screw rod on the bearing frame, its characterized in that, be equipped with on the bearing frame with bearing and pump chamber spaced apart separate chamber, separate the chamber and be located between bearing and the pump chamber and communicate with outside atmosphere.

The screw in the pump housing rotates to generate a negative pressure at the inlet port to draw in gas or fluid at the inlet port and a positive pressure in the pump chamber, and as the screw rotates, gas or fluid is transported to the outlet port. Because the bearing seat is provided with the separating cavity communicated with the outside atmosphere, when gas or fluid in the pump cavity leaks to flow to the bearing, the gas or fluid can enter the separating cavity first, so that the leaked gas or fluid loses pressure at the position of the separating cavity, the influence of the gas or fluid in the pump cavity on the bearing and a lubricant for lubricating the bearing is avoided, and the service life of the screw pump is prolonged.

In foretell screw pump with separate chamber, the bearing frame is including the connecting plate of connecting the pump case and the bearing mounting panel of installation bearing, separate the chamber and be located between connecting plate and the bearing mounting panel, set up the through-hole one that can supply the screw rod to pass on the connecting plate, be equipped with the sealing member one that prevents the material in the pump chamber from leaking from through-hole one between a through-hole inner wall and the screw rod. The first sealing element can prevent gas or fluid in the pump cavity from leaking from the first through hole under the condition that the first sealing element has no damage before the service life of the first sealing element is reached, so that the pressure in the pump cavity is stable, when the first sealing element is used for a long time, the first sealing element finally fails, so that the gas or the fluid in the pump cavity leaks from the first through hole, the bearing is mounted on the bearing mounting plate, and a separation cavity is arranged between the bearing mounting plate and the connecting plate, so that the gas or the fluid in the pump cavity flows into the separation cavity when flowing out of the first through hole, and the separation cavity is connected with the external atmosphere, so that the gas or the fluid leaked from the pump cavity cannot directly influence the bearing, and the influence on the bearing and lubricant for lubricating the bearing is reduced, and the service life.

In foretell screw pump that has and separate the chamber, be equipped with the bounding wall of connecting both between connecting plate and the bearing mounting panel, the bounding wall sets up around the screw rod, and connecting plate, bounding wall and bearing mounting panel enclose to close and form and separate the chamber, have seted up on the bounding wall and have linked through and separate the chamber and outside atmospheric air vent. The arrangement of the enclosing plate can avoid that gas or fluid in the pump cavity is randomly splashed when leaking into the separating cavity to cause pollution, the pressure intensity in the separating cavity is consistent with the external atmospheric pressure intensity through the vent holes arranged on the enclosing plate, so that the gas or fluid leaked in the pump cavity cannot cause direct influence on the bearing, and the influence on the bearing and a lubricant used for lubricating the bearing is reduced to prolong the service life of the screw pump.

In foretell screw pump that has and separate the chamber, set up on the bearing mounting panel with separate the communicating through-hole two in the chamber, the bearing is located through-hole two, still is equipped with the sealing member two that prevents to separate intracavity gas and bearing contact in the through-hole two, and the sealing member is two and is located the bearing and separates between the chamber. The bearing sets up in through-hole two, prevents through sealing member two that the gas in the compartment from contacting with the bearing, reduces to cause the life who influences lifting screw pump to the bearing and be used for lubricated emollient of bearing.

In foretell screw pump with separate chamber, the both ends of pump case all are connected with the bearing frame, and the bearing mounting panel of one of them end bearing frame is connected with end cover one, still be connected with the motor that provides power to the screw rod on the end cover one, be connected with on the bearing mounting panel of other end bearing frame and prevent bearing and outside gas contact's end cover two. The motor connected to the first end cover provides power for the screw rod, so that the screw rod rotates to generate negative pressure at the inlet to suck gas or fluid at the inlet, and the second end cover prevents the bearing from contacting with external gas, thereby reducing the influence on the bearing and lubricant used for lubricating the bearing on the service life of the screw lifting pump.

In the screw pump with the separate cavity, the first end cover is provided with the transmission cavity, one end of the screw rod extends into the transmission cavity, the rotating shaft of the motor also extends into the transmission cavity, and a transmission part for enabling the rotating shaft and the screw rod to be linked is arranged between the rotating shaft and the screw rod. The end parts of the screw rod and the motor rotating shaft are both positioned in the transmission cavity of the end cover I, and the screw rod is enabled to rotate along with the operation of the motor through the transmission part.

In foretell screw pump that has and separate the chamber, the screw rod is located one section cover in the bearing frame and is equipped with the axle sleeve, sealing member one is laminated with the inner wall of axle sleeve and through-hole one respectively, and sealing member two is laminated with the inner wall of axle sleeve and through-hole two respectively. The first sealing element is respectively attached to the shaft sleeve and the inner wall of the first through hole, so that the gas or fluid in the pump cavity can be prevented from leaking from the first through hole under the condition that the first sealing element is not damaged before the service life is reached, and the stability of the pressure in the pump cavity is kept; and the second sealing element is respectively attached to the inner walls of the shaft sleeve and the second through hole, so that the gas in the separation cavity is prevented from contacting the bearing through the second sealing element, and the service life of the screw pump is prolonged by reducing the influence on the bearing and the lubricant for lubricating the bearing.

In the screw pump with the separate cavity, the connecting plate of the bearing seat connected with the motor is provided with an outflow port communicated with the pump cavity. The screw rotation creates a negative pressure at the inlet port, drawing in gas or fluid at the inlet port and ultimately out the outlet port.

Compared with the prior art, this screw pump with separate chamber has following advantage:

1. when gas or fluid in the pump cavity leaks and flows to the bearing, the gas or fluid enters the separation cavity on the bearing seat, so that the leaked gas or fluid loses pressure at the separation cavity, the influence of the gas or fluid in the pump cavity on the bearing and a lubricant for lubricating the bearing is avoided, and the service life of the screw pump is prolonged.

2. The coaming on the bearing seat can avoid the gas or fluid in the pump cavity from splashing randomly when leaking into the separate cavity, thereby causing pollution.

Drawings

Fig. 1 is a schematic perspective view of the screw pump.

Fig. 2 is a sectional view of the present screw pump.

Fig. 3 is a partial enlarged view I of fig. 2.

Fig. 4 is a schematic perspective view of a bearing housing of the screw pump.

Fig. 5 is a perspective view of a bearing housing connected to a motor.

In the drawings, 1, a pump casing; 1a, a pump cavity; 2. an inflow port; 3. an outflow port; 4. a screw; 5. a bearing; 6. a bearing seat; 6a, a separation chamber; 6b, a connecting plate; 6c, enclosing plates; 6d, mounting a bearing plate; 6e, a first through hole; 6f, a second through hole; 6g, vent holes; 7. a first sealing element; 8. a second sealing element; 9. a first end cover; 9a, a transmission cavity; 10. a second end cover; 11. a motor; 12. a transmission member; 13. and a shaft sleeve.

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.

Example one

As shown in fig. 1 to 3, the embodiment of the utility model provides a including pump case 1, pump chamber 1a has in pump case 1, and pump chamber 1a runs through pump case 1's both ends, has seted up inflow entrance 2 on the pump case 1, is equipped with screw rod 4 in the pump chamber 1a, all is connected with the bearing frame 6 of erectting screw rod 4 at pump case 1's both ends.

As shown in fig. 1 to 4, the bearing seat 6 includes a connecting plate 6b and a bearing mounting plate 6d connected to the pump housing 1, a space is provided between the bearing mounting plate 6d and the connecting plate 6b to form a separate chamber 6a communicating with the outside atmosphere, a bearing 5 matching with the screw rod 4 is provided on the bearing mounting plate 6d, a through hole 6e is provided on the connecting plate 6b, the end of the screw rod 4 passes through the through hole 6e to be connected to the bearing 5, a section of the screw rod 4 located in the bearing seat 6 is sleeved with a shaft sleeve 13, a sealing element 7 is provided in the through hole 6e, the sealing element 7 adopts a rubber ring assembly, and the sealing element 7 is respectively attached to the shaft sleeve 13 and the through. In the case that the first sealing member 7 is not damaged before the service life, the first sealing member 7 can prevent the gas or the fluid in the pump chamber 1a from leaking from the first through hole 6e, so that the pressure in the pump chamber 1a is stable; when the first seal 7 is used for a long time, the first seal 7 finally fails to work, so that gas or liquid in the pump cavity 1a leaks from the first through hole 6e, and because the bearing 5 is arranged on the bearing mounting plate 6d and the separation chamber 6a is arranged between the bearing mounting plate 6d and the connecting plate 6b, when the gas or liquid in the pump cavity 1a flows out from the first through hole 6e, the gas or liquid flows into the separation chamber 6a, and the separation chamber 6a is connected with the external atmosphere, the gas or liquid leaking out of the pump cavity 1a does not directly influence the bearing 5, and the service life of the lifting screw pump is reduced, and the influence on the bearing 5 and lubricant for lubricating the bearing 5 is reduced.

As shown in fig. 1 to 4, a through hole two 6f communicated with the partition cavity 6a is formed in the bearing mounting plate 6d, the bearing 5 is located in the through hole two 6f, a sealing element two 8 is further arranged in the through hole two 6f, the sealing element two 8 is a rubber ring component, the sealing element two 8 is located between the bearing 5 and the partition cavity 6a, and the sealing element two 8 is respectively attached to the shaft sleeve 13 and the inner wall of the through hole two 6 f. The second sealing part 8 prevents the gas in the separation chamber 6a from contacting the bearing 5, so that the service life of the lifting screw pump is reduced, and the influence on the bearing 5 and the lubricant for lubricating the bearing 5 is reduced. The first sealing element 7 and the second sealing element 8 can adopt a sealing form such as mechanical sealing or rubber ring sealing.

As shown in fig. 1 to 4, a surrounding plate 6c for connecting the connecting plate 6b and the bearing mounting plate 6d is provided between the connecting plate 6b and the bearing mounting plate 6d, the connecting plate 6b, the surrounding plate 6c and the bearing mounting plate 6d surround to form a partition 6a, and a vent hole 6g for communicating the partition 6a with the outside atmosphere is provided in the surrounding plate 6 c. The bearing 5 is arranged in the second through hole 6f, and the gas in the separation cavity 6a is prevented from contacting the bearing 5 through the second sealing element 8, so that the influence on the service life of the lifting screw pump caused by the bearing 5 and the lubricant for lubricating the bearing 5 is reduced.

As shown in fig. 1 to 3, in the bearing blocks 6 connected at two ends of the pump housing 1, the bearing mounting plate 6d of the bearing block 6 at one end is connected with a first end cover 9, the first end cover 9 is further connected with a motor 11 for providing power to the screw rod 4, the first end cover 9 is provided with a transmission cavity 9a, one end of the screw rod 4 extends into the transmission cavity 9a, a rotating shaft of the motor 11 also extends into the transmission cavity 9a, and a transmission part 12 for linking the rotating shaft and the screw rod 4 is arranged between the rotating shaft and the screw rod. The transmission member 12 can be a gear sleeved on the screw rod 4, and a gear meshed with the gear on the screw rod 4 is sleeved on the rotating shaft; or the screw rod 4 and the rotating shaft are directly connected and driven through a coupler.

As shown in fig. 1 and 2, a second end cap 10 for preventing the contact of the bearing 5 with the outside air is attached to the bearing mounting plate 6d of the bearing housing 6 attached to the other end of the pump housing 1.

As shown in fig. 1 and 5, the connecting plate 6b of the bearing seat 6 connected to the motor 11 is provided with an outflow port 3 communicated with the pump cavity 1a, and the outflow port 3 is connected to a corresponding pipeline for conveying.

As shown in fig. 1 to 4, the screw 4 in the pump housing 1 rotates to generate a negative pressure at the inlet port 2 to suck gas or fluid at the inlet port 2, a positive pressure is formed in the pump chamber 1a, and as the screw 4 rotates, the gas or fluid is transferred to the outlet port 3 and finally outputted from the outlet port 3, and the pressure in the pump chamber 1a is high during operation of the screw pump, and gas or fluid in the pump chamber 1a may leak when the seal assembly between the bearing 5 and the pump chamber 1a fails. Because the bearing seat 6 is provided with the separating chamber 6a communicated with the outside atmosphere, when the gas or fluid in the pump cavity 1a leaks and flows to the bearing 5, the gas or fluid can enter the separating chamber 6a first, so that the leaked gas or fluid is decompressed at the separating chamber 6a, the influence of the gas or fluid in the pump cavity 1a on the bearing 5 and the lubricant for lubricating the bearing 5 is avoided, and the service life of the screw pump is prolonged.

Example two

The present embodiment is substantially the same as the first embodiment, and differs therefrom in that the bearing housing 6 connected to the motor 11 in the present embodiment is not provided with the outflow port 3, but is provided with the outflow port 3 in the pump housing 1.

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. The utility model provides a screw pump with separate chamber, includes pump case (1) that has pump chamber (1a), sets up inflow inlet (2) that are linked together with pump chamber (1a) on pump case (1), still is equipped with screw rod (4) in pump chamber (1a), is connected with bearing frame (6) on pump case (1), is equipped with bearing (5) of connecting screw rod (4) on bearing frame (6), its characterized in that, be equipped with on bearing frame (6) and separate chamber (6a) spaced apart bearing (5) and pump chamber (1a), separate chamber (6a) be located between bearing (5) and pump chamber (1a) and communicate with outside atmosphere.

2. Screw pump with a compartment according to claim 1, characterised in that the bearing housing (6) comprises a connecting plate (6b) for connecting the pump housing (1) and a bearing mounting plate (6d) for mounting the bearing (5), the compartment (6a) is located between the connecting plate (6b) and the bearing mounting plate (6d), a first through hole (6e) for the screw (4) to pass through is formed in the connecting plate (6b), and a first seal (7) for preventing the leakage of the substance in the pump chamber (1a) from the first through hole (6e) is formed between the inner wall of the first through hole (6e) and the screw (4).

3. The screw pump with the separate cavity according to claim 2, wherein a surrounding plate (6c) for connecting the connecting plate (6b) and the bearing mounting plate (6d) is arranged between the connecting plate (6b) and the bearing mounting plate (6d), the surrounding plate (6c) is arranged around the screw (4), the connecting plate (6b), the surrounding plate (6c) and the bearing mounting plate (6d) are enclosed to form the separate cavity (6a), and a vent hole (6g) for communicating the separate cavity (6a) with the outside atmosphere is formed in the surrounding plate (6 c).

4. The screw pump with the separate cavity according to claim 3, wherein the bearing mounting plate (6d) is provided with a second through hole (6f) communicated with the separate cavity (6a), the bearing (5) is positioned in the second through hole (6f), a second sealing element (8) for preventing gas in the separate cavity (6a) from contacting the bearing (5) is further arranged in the second through hole (6f), and the second sealing element (8) is positioned between the bearing (5) and the separate cavity (6 a).

5. Screw pump with a compartment according to claim 2 or 3 or 4, characterised in that the pump housing (1) is connected at both ends with bearing blocks (6), wherein the bearing mounting plate (6d) of the bearing block (6) at one end is connected with a first end cap (9), the first end cap (9) is further connected with a motor (11) for powering the screw (4), and the bearing mounting plate (6d) of the bearing block (6) at the other end is connected with a second end cap (10) for preventing the bearing (5) from contacting with the outside air.

6. Screw pump with a compartment according to claim 5, characterised in that the first end cap (9) has a transmission chamber (9a), one end of the screw (4) extends into the transmission chamber (9a), the rotating shaft of the motor (11) also extends into the transmission chamber (9a), and a transmission member (12) is arranged between the rotating shaft and the screw (4) for linking the two.

7. Screw pump with compartment according to claim 4, characterised in that the section of the screw (4) inside the bearing housing (6) is provided with a bushing (13), the first sealing element (7) is attached to the bushing (13) and the inner wall of the first through hole (6e) respectively, and the second sealing element (8) is attached to the bushing (13) and the inner wall of the second through hole (6f) respectively.

8. Screw pump with compartment according to claim 5, characterised in that the connection plate (6b) of the bearing block (6) connected to the motor (11) is provided with an outflow opening (3) communicating with the pump chamber (1 a).