CN213838895U

CN213838895U - Screw pump and bearing seat of screw pump

Info

Publication number: CN213838895U
Application number: CN202022175518.2U
Authority: CN
Inventors: 王于祥; 娄汪星
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: 2021-07-30
Anticipated expiration: 2030-09-28

Abstract

The utility model belongs to the technical field of the screw pump, concretely relates to screw pump and screw pump's bearing frame. It has solved the problem that current screw pump life is low. The bearing seat of the screw pump comprises a bearing seat body and is characterized in that an anti-corrosion connecting part used for being connected with a pump shell is arranged at the end part of the bearing seat body. The utility model discloses a life of lifting screw pump.

Description

Screw pump and bearing seat of screw pump

Technical Field

The utility model belongs to the technical field of the screw pump, concretely relates to screw pump and screw pump's bearing frame.

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.

The screw rod both ends in the screw pump can erect on the bearing frame, and the bearing frame links firmly on the pump case, and the bearing frame seals pump case both ends, and according to the difference of screw pump application scene, some screw pumps can carry some to have corrosive material, and conventional bearing frame adopts and is made the cast iron material, and the bearing frame that the cast iron material was made can be corroded by the material that has the corrosivity, leads to the life decline of screw pump.

Secondly, in the process of pressurizing and exhausting the screw pump, the air inlet on the pump shell sucks air into the pump cavity to pressurize the pump cavity, the air outlet is formed in the pump shell to output high-pressure air, the pressure in the pump shell is higher than the external atmospheric pressure in the process, the high-pressure air can enter the bearing seat, the lubricant in the bearing seat is oxidized, the service life of the bearing lubricant is shortened, and the service life of the screw pump is influenced.

Disclosure of Invention

The utility model aims at having the above-mentioned problem to current technique, provided a screw pump and screw pump's bearing frame, the utility model aims to solve the technical problem that: how to improve the service life of the screw pump.

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

the bearing seat of the screw pump comprises a bearing seat body and is characterized in that an anti-corrosion connecting part used for being connected with a pump shell is arranged at the end part of the bearing seat body.

The bearing frame of connection on the pump case includes the bearing frame body, and the tip of bearing frame body is equipped with anticorrosive connecting portion, links to each other with the pump case through anticorrosive connecting portion, and anticorrosive connecting portion prevent that bearing frame body direct contact from to the material in the pump chamber, and when screw pump carried to have corrosive substance, the setting of anticorrosive connecting portion can effectually avoid the bearing frame body to receive the corruption, promotes the life of bearing frame, and then promotes screw pump's life.

In the bearing seat of the screw pump, the anticorrosive connecting part is made of an anticorrosive material, the anticorrosive connecting part is connected with the bearing seat body, the anticorrosive connecting part is provided with an outflow port, the anticorrosive connecting part is further provided with a drain pipe communicated with the outflow port, and the drain pipe is made of an anticorrosive material. Along with the screw rod rotation in the screw pump, the material of pump intracavity flows to the other end from one end and exports at last, and anticorrosive connecting portion connect the tip at the pump case, and the material that the screw rod was carried is exported to the play on the anticorrosive connecting portion, and the drain pipe that sets up on anticorrosive connecting portion also is anticorrosive material and makes the drain pipe also have corrosion resisting property, promotes the life of screw pump.

In the bearing seat of the screw pump, the anti-corrosion connecting part is plate-shaped and is provided with a first through hole through which the screw rod can pass, the outflow port penetrates through two plate surfaces on the anti-corrosion connecting part, and the outflow port of the anti-corrosion connecting part, which faces the plate surface of the pump shell, is arranged in a fan shape along the circumferential direction of the first through hole. The screw rod passes through-hole one and gets into the bearing frame body, and the screw rod rotates and carries the material of pump intracavity towards the egress opening department on the anticorrosive connecting portion, and final extrusion is on anticorrosive connecting portion, and the egress opening is fan-shaped and sets up along a through-hole circumference and makes the more smooth and easy entry egress opening of material that the screw rod let was carried at rotatory in-process, reduces the pressure size of carrying the material around through-hole one, reduces the risk that carries the material from through-hole one outflow, promotes screw pump's life.

In the bearing seat of the screw pump, the bearing seat body is provided with a bearing for connecting the screw rod, the bearing seat body is also provided with a separation cavity, and the separation cavity is positioned between the bearing and the anticorrosive connecting part and communicated with external atmosphere. In the screw pump, a sealing element is usually arranged between the bearing and the pump cavity, the sealing element is usually arranged between the screw and the first through hole, the tightness of the pump cavity is ensured, and the influence of substances in the pump cavity on the bearing is prevented. Because set up the outside atmospheric chamber that separates of intercommunication on this bearing frame body, so when the material of pump intracavity takes place to leak the flow direction bearing from the through-hole one, can advance to go into and separate the chamber, make the material that leaks lose pressure in separating chamber department, avoid causing the influence to bearing and the emollient that is used for lubricated bearing, promote screw pump's life.

In the bearing seat of the screw pump, the bearing seat body comprises a connecting plate connected with the anti-corrosion connecting portion and a bearing mounting plate for mounting the bearing, the separating cavity is located between the connecting plate and the bearing mounting plate, a second through hole for the screw to pass through is formed in the connecting plate, and a first sealing element for preventing the leakage of the pump cavity is arranged in each of the first through hole and the second through hole. Under the condition that the first sealing element has not reached the service life and is not damaged, the first sealing element can prevent the substance in the pump cavity from leaking from the first through hole and the second through hole, so that the pressure in the pump cavity is stable, and the gas or liquid flowing out of the outflow hole has stable pressure; when the first sealing element is used for a long time, the first sealing element finally fails to work, so that gas or liquid in the pump cavity leaks from the first through hole and the second through hole.

In foretell screw pump's bearing frame, 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, separate the chamber and enclose by connecting plate, bounding wall and bearing mounting panel and close and form, seted up on the bounding wall and communicate and separate chamber and outside atmospheric air vent. The arrangement of the enclosing plate can avoid that substances in the pump cavity are 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 formed in the enclosing plate, so that the substances 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 the bearing seat of the screw pump, a third through hole communicated with the separated cavity is formed in the bearing mounting plate, the bearing is located in the third through hole, a second sealing element for preventing gas in the separated cavity from contacting the bearing is further arranged in the third through hole, and the second sealing element is located between the bearing and the separated cavity. The bearing sets up in through-hole three, 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.

The utility model provides a screw pump, includes the pump case, is equipped with the pump chamber that runs through the pump case tip in the pump case, is equipped with the screw rod in the pump chamber, and pump case end connection has the bearing frame of closed pump chamber, its characterized in that, the bearing frame is including being platelike anticorrosive connecting portion and bearing frame body, and anticorrosive connecting portion are located between pump case and the bearing frame body, and anticorrosive connecting portion link to each other with the pump case, and the bearing frame body links to each other with anticorrosive connecting portion, and anticorrosive connecting portion are made by corrosion-resistant material.

The screw rod in the screw pump is responsible for carrying the material in the force (forcing) pump intracavity, the bearing frame of connection on pump case tip includes closing plate and the bearing frame body that anticorrosive material made, the closing plate is located between pump case and the bearing frame body, the pump chamber through the closing plate with the pump case is sealed, and the closing plate separates the bearing frame body with the pump case, prevent the material of bearing frame body direct contact to in the pump chamber, when the screw pump conveying has corrosive substance, the setting of closing plate can effectually avoid the bearing frame body to receive the corruption, promote the life of bearing frame, and then promote the life of screw pump.

In the screw pump, the pump casing is provided with an inflow port communicated with the pump cavity, the anticorrosive connecting part is provided with an outflow port communicated with the pump cavity, the anticorrosive connecting part is further provided with a drain pipe communicated with the outflow port, and the drain pipe is made of an anticorrosive material. The material to be conveyed flows into the pump cavity from the inflow port of the pump shell, the material in the pump cavity flows from one end to the other end along with the rotation of the screw and is finally output, the closing plate is connected to the end part of the pump shell, the outflow port on the closing plate outputs the material conveyed by the screw, and the drainage pipe arranged on the closing plate is also made of an anticorrosive material, so that the drainage pipe also has the anticorrosive performance, and the service life of the screw pump is prolonged.

In the bearing frame of foretell screw pump, be equipped with the sealing washer between anticorrosive connecting portion and the pump case, the sealing washer supports with the pump case terminal surface and leans on, and anticorrosive connecting portion offer the seal groove of placing the sealing washer on the face towards the pump case, the egress opening of anticorrosive connecting portion on the face towards the pump case is located between seal groove and the through-hole one. The sealing performance of the anti-corrosion connecting portion to the pump cavity is improved through the arrangement of the sealing ring, the outflow port is located between the sealing groove and the through hole, the pressure of the substance in the pump cavity to the anti-corrosion connecting portion and the position where the substance abuts against the pump shell can be reduced, the risk of leakage of the substance in the pump cavity from the position between the pump shell and the anti-corrosion connecting portion is reduced, and the service life of the screw pump is prolonged.

Compared with the prior art, the bearing seat of the screw pump has the following advantages:

1. this bearing frame includes bearing frame body and anticorrosive connecting portion, and anticorrosive connecting portion link to each other with the pump case, and when the material of pump intracavity had certain corrosivity, because anticorrosive connecting portion were made to anticorrosive material, the pump case is separated through anticorrosive connecting portion with the bearing frame body, avoids the bearing frame body to contact the material that has the corrosivity in the pump chamber, promotes the life of bearing frame, and then promotes screw pump's life.

2. The outflow port is in a fan shape and is arranged along the circumferential direction of the through hole, so that conveyed substances can enter the outflow port more smoothly in the rotating process of the screw, the pressure of the conveyed substances around the through hole I is reduced, the risk of outflow of the conveyed substances from the through hole I is reduced, and the service life of the screw pump is prolonged.

3. The outflow port is located between the sealing groove and the through hole I, so that the pressure of substances in the pump cavity on the anti-corrosion connecting portion and the pump shell is reduced, the risk of leakage of the substances in the pump cavity from the position between the pump shell and the anti-corrosion connecting portion is reduced, and the service life of the screw pump is prolonged.

4. When the substance in the pump cavity leaks and flows to the bearing, the substance can enter the separating cavity on the bearing seat, so that the leaked substance loses pressure at the position of the separating cavity, the influence of the substance 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.

5. The coaming on the bearing block can avoid the matter in the pump cavity from splashing at will when leaking to separate the chamber in, cause the pollution.

Drawings

Fig. 1 is a schematic perspective view of a screw pump according to a first embodiment.

Figure 2 is a schematic perspective view of a bearing housing without a compartment on the housing body of the bearing housing.

Figure 3 is an exploded schematic view of a bearing housing without a compartment on the housing body of the bearing housing.

Fig. 4 is a schematic perspective view of a screw pump according to a second embodiment.

FIG. 5 is a cross-sectional view of a screw pump.

Fig. 6 is a partial enlarged view I of fig. 5.

Figure 7 is a schematic perspective view of a bearing housing body of the bearing housing with a compartment.

In the drawings, 1, a pump casing; 1a, a pump cavity; 2. a screw; 3. a bearing; 4. an inflow port; 5. a bearing seat; 5a, an anticorrosion connecting part; 5a1, outflow; 5a2, drain tube; 5a3, via one; 5a4, a seal groove; 5b, a bearing seat body; 5b1, cell; 5b2, connecting plate; 5b21 and a second through hole; 5b3, bearing mounting plate; 5b31, via three; 5b4, fencing; 5b41, vent hole; 6. a seal ring; 7. a first sealing element; 8. and a second sealing element.

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, 2 and 3, the screw 2 pump includes a pump casing 1, a pump cavity 1a penetrating through the end of the pump casing 1 is arranged in the pump casing 1, a screw 2 is arranged in the pump cavity 1a, the end of the pump casing 1 is connected with a bearing seat 5 closing the pump cavity 1a, the specific bearing seat 5 includes an anti-corrosion connecting part 5a and a bearing seat body 5b, the anti-corrosion connecting part 5a is plate-shaped, the anti-corrosion connecting part 5a is located between the pump casing 1 and the bearing seat body 5b, the anti-corrosion connecting part 5a is connected with the pump casing 1 through a bolt, the bearing seat 5 is connected with the anti-corrosion connecting part 5a through a bolt, a yielding groove accommodating a drainage pipe 5a2 is formed in the bearing seat body 5b, and after the bearing 3 body is connected with the anti-corrosion connecting part 5a, the drainage pipe 5a2 is located in the yielding groove. The corrosion-proof connecting part 5a is made of corrosion-proof materials, the pump shell 1 is provided with an inflow port 4 communicated with the pump cavity 1a, the corrosion-proof connecting part 5a is provided with an outflow port 5a1 communicated with the pump cavity 1a, the corrosion-proof connecting part 5a is further provided with a drainage pipe 5a2 communicated with the outflow port 5a1, and the drainage pipe 5a2 is made of corrosion-proof materials. The corrosion-proof connecting part 5a and the drain pipe 5a2 can be made of stainless steel metal material or FRP material sprayed on the surface of the corrosion-proof connecting part 5a and the inner wall of the drain pipe 5a2 to realize corrosion prevention.

As shown in fig. 1, 2 and 3, a screw 2 in a screw 2 pump is responsible for conveying and pressurizing substances in a pump cavity 1a, the substances in the pump cavity 1a flow from one end to the other end and are finally output along with the rotation of the screw 2, a bearing seat 5 connected to the end part of a pump shell 1 comprises an anticorrosion connecting part 5a and a bearing seat body 5b made of anticorrosion materials, the anticorrosion connecting part 5a is positioned between the pump shell 1 and the bearing seat body 5b, the pump cavity 1a of the pump shell 1 is sealed by the anticorrosion connecting part 5a, and the corrosion-proof connection portion 5a separates the bearing housing body 5b from the pump housing 1, prevents the bearing housing body 5b from directly contacting the substance in the pump chamber 1a, when the pump of screw rod 2 delivered has corrosive substance, the setting of anticorrosive connecting portion 5a can effectually avoid bearing frame body 5b to receive the corruption, promotes bearing frame 5's life. The anticorrosion connecting part 5a is connected with the end part of the pump shell 1, the outflow port 5a1 on the anticorrosion connecting part 5a outputs the substances conveyed by the screw 2, the drain pipe 5a2 arranged on the anticorrosion connecting part 5a is also made of anticorrosion materials, so that the drain pipe 5a2 also has anticorrosion performance, and the service life of the screw 2 pump is prolonged.

As shown in fig. 2 and 3, the corrosion-resistant connecting portion 5a is provided with a first through hole 5a3 through which the screw 2 can pass, the outflow port 5a1 penetrates through two plate surfaces on the corrosion-resistant connecting portion 5a, the corrosion-resistant connecting portion 5a faces the outflow port 5a1 on the plate surface of the pump case 1 and is arranged in a fan shape along the circumferential direction of the first through hole 5a3, a seal ring 6 is arranged between the corrosion-resistant connecting portion 5a and the pump case 1, the seal ring 6 abuts against the end surface of the pump case 1, the corrosion-resistant connecting portion 5a faces the plate surface of the pump case 1 and is provided with a seal groove 5a4 in which the seal ring 6 is placed, and the outflow port 5a1 of the corrosion-resistant connecting portion 5a facing the plate surface of the pump case 1 is located between the seal groove 5a4 and the first through hole 5a 3. The sealing performance of the anti-corrosion connecting part 5a on the pump cavity 1a is improved due to the arrangement of the sealing ring 6, the outflow port 5a1 is located between the sealing groove 5a4 and the through hole one 5a3, the pressure of substances in the pump cavity 1a on the abutting position of the anti-corrosion connecting part 5a and the pump shell 1 can be reduced, the risk of leakage of the substances in the pump cavity 1a from the position between the pump shell 1 and the anti-corrosion connecting part 5a is further reduced, and the service life of the screw 2 pump is prolonged.

Example two

The present embodiment is substantially the same as the above-described embodiments, and differs therefrom in that, as shown in fig. 4 to 7, the bearing seat body 5b in the present embodiment has a separation chamber 5b1, specifically, the bearing seat body 5b includes a connecting plate 5b2 and a bearing mounting plate 5b3 connected to the corrosion-proof connecting portion 5a, a shroud 5b4 connecting the connecting plate 5b2 and the bearing mounting plate 5b3 is provided between the connecting plate 5b2 and the bearing mounting plate 5b3, and the separation chamber 5b1 is located between the connecting plate 5b2 and the bearing mounting plate 5b3 and is formed by enclosing the connecting plate 5b2, the shroud 5b4 and the bearing mounting plate 5b 3. The connecting plate 5b2 is provided with a through hole two 5b21 through which the screw 2 can pass, and the through hole one 5a3 and the through hole two 5b21 are both provided with a sealing element one 7 for preventing the leakage of the pump cavity 1 a. The bearing mounting plate 5b3 is provided with a through hole III 5b31 communicated with the separating chamber 5b1, a bearing 3 connected with the screw 2 is arranged in the through hole III 5b31, a sealing element II 8 for preventing gas in the separating chamber 5b1 from contacting with the bearing 3 is further arranged in the through hole III 5b31, and the sealing element II 8 is positioned between the bearing 3 and the separating chamber 5b 1. The gas in compartment 5b1 is prevented from contacting bearing 3 by seal two 8, reducing the impact on bearing 3 and the lubricant used to lubricate bearing 3 on the life of the pump of jack screw 2.

As shown in fig. 4 to 7, the enclosure 5b4 surrounds the screw 2, and the enclosure 5b4 is provided with a vent hole 5b41 for communicating the compartment 5b1 with the outside atmosphere. The arrangement of the enclosing plate 5b4 can prevent substances in the pump cavity 1a from being splashed randomly when leaking into the partition chamber 5b1 to cause pollution, the pressure in the partition chamber 5b1 is consistent with the external atmospheric pressure through the vent hole 5b41 arranged on the enclosing plate 5b4, the substances leaked in the pump cavity 1a cannot directly influence the bearing 3, and the influence on the bearing 3 and the lubricant used for lubricating the bearing 3 on the service life of the lifting screw 2 pump is reduced.

As shown in fig. 4 to 7, when the screw 2 in the pump housing 1 rotates to generate a negative pressure at the inlet 4 and suck the substance at the inlet 4, a positive pressure is formed in the pump chamber 1a, and the substance is transferred to the outlet 5a1 along with the rotation of the screw 2 and finally discharged from the outlet 5a1, the pressure in the pump chamber 1a is high during the operation of the screw 2 pump, and the substance in the pump chamber 1a may leak when the sealing assembly between the bearing 3 and the pump chamber 1a fails. As the bearing seat body 5b is provided with the separating chamber 5b1 communicated with the outside atmosphere, when substances in the pump cavity 1a leak from the through hole I5 a3 and flow to the bearing 3, the substances can enter the separating chamber 5b1 first, so that the leaked substances lose pressure at the separating chamber 5b1, the influence on the bearing 3 and lubricant for lubricating the bearing 3 is avoided, and the service life of the screw 2 pump is prolonged.

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 bearing frame of screw pump, bearing frame (5) are equipped with anticorrosive connecting portion (5a) that are used for being connected with pump case (1) including bearing frame body (5b), its characterized in that, bearing frame body (5b) tip.

2. Bearing support of a screw pump according to claim 1, characterized in that the corrosion-resistant connection part (5a) is made of a corrosion-resistant material, the corrosion-resistant connection part (5a) is connected to the bearing support body, the corrosion-resistant connection part (5a) is provided with an outflow opening (5a1), the corrosion-resistant connection part (5a) is further provided with a drain pipe (5a2) communicating with the outflow opening (5a1), and the drain pipe (5a2) is made of a corrosion-resistant material.

3. Bearing support for a screw pump according to claim 2, characterised in that the corrosion-resistant connection (5a) is plate-shaped and is provided with a first through hole (5a3) for the screw (2) to pass through, the outflow opening (5a1) extends through both faces of the corrosion-resistant connection (5a), and the corrosion-resistant connection (5a) is fan-shaped towards the outflow opening (5a1) of the face of the pump housing (1) in the circumferential direction of the first through hole (5a 3).

4. Bearing support for a screw pump according to claim 3, wherein the bearing support body (5b) is provided with a bearing (3) for connection to the screw (2), the bearing support body (5b) is further provided with a compartment (5b1), the compartment (5b1) is located between the bearing (3) and the anti-corrosion connection (5a) and is open to the outside atmosphere.

5. Bearing support for a screw pump according to claim 4, characterized in that the bearing support body (5b) comprises a connecting plate (5b2) connected to the corrosion-resistant connection (5a) and a bearing mounting plate (5b3) for mounting the bearing (3), the compartment (5b1) is located between the connecting plate (5b2) and the bearing mounting plate (5b3), the connecting plate (5b2) is provided with a second through hole (5b21) for the screw (2) to pass through, and the first through hole (5a3) and the second through hole (5b21) are both provided with a first seal (7) for preventing the pump cavity (1a) from leaking.

6. Bearing support for a screw pump according to claim 5, characterized in that a shroud (5b4) is provided between the connecting plate (5b2) and the bearing mounting plate (5b3) to connect the two, the shroud (5b4) is provided around the screw (2), the compartment (5b1) is formed by the connection plate (5b2), the shroud (5b4) and the bearing mounting plate (5b3) in a surrounding manner, and the shroud (5b4) is provided with a vent (5b41) for communicating the compartment (5b1) with the outside atmosphere.

7. Bearing support for a screw pump according to claim 6, wherein the bearing mounting plate (5b3) is provided with a through hole III (5b31) communicating with the compartment (5b1), the bearing (3) is located in the through hole III (5b31), a seal II (8) for preventing gas in the compartment (5b1) from contacting the bearing (3) is further provided in the through hole III (5b31), and the seal II (8) is located between the bearing (3) and the compartment (5b 1).

8. The utility model provides a screw pump, includes pump case (1), is equipped with pump chamber (1a) that runs through pump case (1) tip in pump case (1), is equipped with screw rod (2) in pump chamber (1a), and pump case (1) end connection has bearing frame (5) of closed pump chamber (1a), its characterized in that, bearing frame (5) are located between pump case (1) and bearing frame body (5b) including being platelike anticorrosive connecting portion (5a) and bearing frame body (5b), anticorrosive connecting portion (5a), and anticorrosive connecting portion (5a) link to each other with pump case (1), and bearing frame body (5b) link to each other with anticorrosive connecting portion (5a), and anticorrosive connecting portion (5a) are made by corrosion-resistant material.

9. Screw pump according to claim 8, wherein the pump housing (1) is provided with an inflow opening (4) communicating with the pump chamber (1a), the corrosion-resistant connection portion (5a) is provided with an outflow opening (5a1) communicating with the pump chamber (1a), the corrosion-resistant connection portion (5a) is further provided with a drain pipe (5a2) communicating with the outflow opening (5a1), and the drain pipe (5a2) is made of a corrosion-resistant material.

10. A screw pump according to claim 9, wherein a sealing ring (6) is arranged between the anti-corrosion connecting part (5a) and the pump casing (1), the sealing ring (6) abuts against the end face of the pump casing (1), a sealing groove (5a4) for placing the sealing ring (6) is formed in the surface of the anti-corrosion connecting part (5a) facing the pump casing (1), and an outlet (5a1) of the anti-corrosion connecting part (5a) facing the surface of the pump casing (1) is located between the sealing groove (5a4) and the first through hole (5a 3).