A twin screw pump with a male and a female screw

Abstract

The present application belongs to the field of screw pump, and particularly relates to a double screw pump with male and female screws, which comprises a shell, a main shaft and a secondary shaft arranged in the shell, and an adjusting plate rotatably connected to the main shaft and the secondary shaft, the adjusting plate being slidably connected to the shell for adjusting the gap between a first screw sleeve and a second screw sleeve, one of the first screw sleeve and the second screw sleeve being made of metal rigid material, and the other being made of rubber flexible material, compared with the prior art, the present application is more convenient to adjust the gap between the main shaft and the secondary shaft, and is suitable for the scene that the gap between the main shaft and the secondary shaft of the pump body needs to be frequently adjusted, the present application adopts one screw sleeve made of rigid material and one screw sleeve made of rubber flexible material, which can avoid the collision of the rigid type in the mutual meshing conveying process, and make the double screw conveying more smooth, the male and female screws refer to the steel and flexible screw sleeves of the present application.

Description

Technical Field

[0001] The invention belongs to the field of screw pumps, and in particular relates to a twin-screw pump with male and female screws. Background Art

[0002] The twin-screw pump is composed of a sealed chamber with a constant volume formed between the spiral sleeve and the pump body or bushing that mesh with each other on the driving and driven shafts. The medium is sent to the middle of the pump body as the screw shaft rotates, and the two are merged together and finally delivered to the pump outlet, thus achieving the purpose of pump delivery.

[0003] The fitting clearance between the two spiral parts of a twin-screw pump usually requires special design, and needs to be comprehensively considered and selected based on relevant parameters such as the temperature, viscosity, pressure difference, material combination, installation form, and installation position of the conveying medium. In order to adapt to different working conditions and adjust the clearance after wear, when adjusting the clearance between the main and secondary shafts of the current twin-screw pump, first open the pump transmission tooth end, loosen the gear clamping sleeve, manually adjust the clearance between the lower spiral sleeve, and then re-tighten the gear. It is necessary to open the pump casing and remove the gear components, which is very inconvenient to adjust, and it needs to be reinstalled after the adjustment is completed. It is very inconvenient when the pump body needs to convey materials of other particle sizes, or when the clearance needs to be adjusted after the spiral part is worn. In addition, the spiral part of a conventional twin-screw pump is generally made of steel material. Due to uneven material, asymmetric shape, processing or assembly errors, the screw meshing is unstable, causing the pump to vibrate and vibrate, causing pump noise, bearing heating and other problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a twin-screw pump with yin and yang screws to solve the problems in the prior art. The technical solution adopted by the present invention is:

[0005] A twin-screw pump with a male and female screw, comprising a housing, a main shaft and a secondary shaft being arranged in the housing, one end of the main shaft passing through the housing and connected to a motor, the main shaft being connected to the secondary shaft via a connecting mechanism and being capable of driving the secondary shaft to rotate, a first spiral sleeve being arranged on the main shaft, a second spiral sleeve being arranged on the secondary shaft and meshing with the first spiral sleeve, the main shaft and the secondary shaft being rotatably connected to an adjustment plate, the adjustment plate being slidably connected to the housing for adjusting a gap between the first and second spiral sleeves, the connecting mechanism comprising a meshed first gear and a second gear, the first gear being connected to the main shaft via a first belt, the second gear being connected to the secondary shaft via a second belt, the first and second gears being height-adjustably connected to the housing for tensioning the first and second belts;

[0006] One of the first spiral sleeve and the second spiral sleeve is made of a metal rigid material, and the other is made of a rubber flexible material.

[0007] Further, two adjusting plates are arranged on the main shaft and the auxiliary shaft respectively, the main shaft and the auxiliary shaft pass through the two adjusting plates, the shell is provided with a through hole matched with the adjusting plate, the adjusting plate passes through the through hole, and one end of the adjusting plate passing through the through hole is connected with the shell through an adjusting screw, so that the length of the adjusting plate passing through the through hole is adjusted, and the gap between the main shaft and the auxiliary shaft is adjusted.

[0008] Further, a sealing plate is arranged in the shell, the sealing plate divides the shell into two chambers, the connecting mechanism is arranged in one of the chambers, and the first and second screw sleeves are arranged in the other chamber.

[0009] Further, the sealing plate is provided with a first hollow portion and a second hollow portion, sealing grooves are arranged on inner walls of the first and second hollow portions respectively, the first sliding plate is arranged in the first hollow portion, and the second sliding plate is arranged in the second hollow portion.

[0010] Further, opposite ends of the first and second hollow portions are communicated, the first and second sliding plates are respectively provided with matched notch portions at opposite ends, and the notch portions of the two are symmetrically arranged and are matched with each other.

[0011] Further, a first pulley is arranged on the main shaft, a second pulley is arranged on the auxiliary shaft, a first belt is arranged on the first pulley, and a second belt is arranged on the second pulley.

[0012] Further, the first and second gears are arranged on the adjusting support in a rotatable mode, and the adjusting support is connected with the shell in an adjustable height mode, so that the first and second belts are tensioned.

[0013] Further, the shell is threadedly connected with a screw rod, and the screw rod is rotatably connected with the adjusting support.

[0014] The present application has the following beneficial effects: compared with the prior art, the double screw pump of the present application supports and positions the main shaft and the auxiliary shaft through the adjusting plate, and slidably connects the adjusting plate and the shell, so that the gap between the main shaft and the auxiliary shaft can be adjusted by sliding the adjusting plate, which is more convenient and faster, and the adjustment of the gap between the main shaft and the auxiliary shaft is more convenient, which is suitable for the scene where the gap between the main shaft and the auxiliary shaft of the pump body needs to be adjusted frequently, the present application adopts one spiral sleeve as rigid material and one spiral sleeve as rubber flexible material, which can avoid collision of rigid type during mutual meshing conveying, and make the double screw conveying more smooth. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present application;

[0016] Figure 2 is Figure 1 is an enlarged schematic diagram of A3 in the middle;

[0017] Figure 3 is Figure 1 is a sectional view of A1-A1 in the middle;

[0018] Figure 4 is Figure 1 is a sectional view of A2-A2 in the middle;

[0019] Figure 5 is a schematic diagram of the sealing plate, wherein the left side is a B-B direction schematic diagram, and the lower side is a C-C direction schematic diagram;

[0020] Figure 6 is a schematic diagram of the sealing plate. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings. Figures 1-6 The technical solutions in the embodiments of the present application will be described below in conjunction with the drawings.

[0022] A double screw pump with male and female screws comprises a housing 1, a main shaft 2 and a secondary shaft 3 arranged in the housing 1, the main shaft 2 penetrates the housing 1 at one end and is connected to a motor, the main shaft 2 is connected to the secondary shaft 3 through a connecting mechanism 6 to drive the secondary shaft 3 to rotate, a first screw sleeve 201 is arranged on the main shaft 2, a second screw sleeve 301 is arranged on the secondary shaft 3 and engages with the first screw sleeve 201, the main shaft 2 and the secondary shaft 3 are respectively connected to an adjusting plate 4 which can rotate, the adjusting plate 4 is slidably connected to the housing 1 to adjust the gap between the first and second screw sleeves, the connecting mechanism 6 comprises engaged first and second gears 601 and 604, the first gear 601 is connected to the main shaft 2 through a first belt 602, the second gear 604 is connected to the secondary shaft 3 through a second belt 605, and the first and second gears are connected to the housing at different heights to tension the first and second belts.

[0023] One of the first and second screw sleeves 201 and 301 is made of metal rigid material and the other is made of rubber flexible material, the first screw sleeve 201 is preferably made of metal rigid material such as steel, and the second screw sleeve 301 is preferably made of rubber flexible material, one screw sleeve is made of rigid material and the other is made of rubber flexible material, which can avoid collision of rigid materials during mutual engagement and conveying, making the double screw conveying more smooth, and the male and female screws refer to the steel and flexible screw sleeves of the present application.

[0024] Specifically, the main shaft 2 and the secondary shaft 3 are arranged in parallel, the housing 1 is the outer shell of the double screw pump, the housing 1 is provided with a feeding port at one end and a discharging port (not shown in the figure) on the side, the feeding port is located away from the motor, the main shaft 2 drives the secondary shaft 3 to rotate together through the rotation of the motor, the rotation directions of the two are opposite, the first and second screw sleeves engage to output the material from the feeding port to the discharging port, the first and second screw sleeves are prior art, the peripheral surface of which is provided with mutually engaging screw portions to function as extruding and conveying the material.

[0025] The adjusting plate 4 is a square plate structure, which is provided with a hole position matched with the main shaft 2 and the auxiliary shaft 3, the main shaft 2 and the auxiliary shaft 3 pass through the corresponding adjusting plate 4 and are rotatably connected with the adjusting plate 4, the adjusting plate 4 is located on the side opposite to the main shaft 2 and the auxiliary shaft 3 and is symmetrically arranged, after the double screw pump is used for a long time, the material causes wear to the first and second spiral sleeves, the gap between the first and second spiral sleeves becomes larger, the conveying capacity becomes weak, or different particle size materials need to be conveyed, at this time, the position of the sliding adjusting plate 4 can be adjusted, so that the main shaft 2 and the auxiliary shaft 3 are close to each other, so that the first and second spiral sleeves are close to each other, so as to reduce the gap between the first and second spiral sleeves, thereby offsetting the wear amount of the first and second spiral sleeves or conveying different particle size materials, compared with the prior art, the double screw pump of the present application supports and positions the main shaft and the auxiliary shaft through the adjusting plate 4, and slidably connects the adjusting plate 4 and the housing 1, so that the gap between the main shaft and the auxiliary shaft can be adjusted by sliding the adjusting plate 4, which is more convenient and fast, and the gap between the main shaft and the auxiliary shaft is adjusted more easily and conveniently, and is suitable for the scene that the gap between the main shaft and the auxiliary shaft of the pump body needs to be adjusted frequently.

[0026] When the gap between the main shaft and the auxiliary shaft is adjusted, the main shaft and the auxiliary shaft move relatively, the gap between them becomes smaller, and then the first and second belts become loose, at this time, the height of the first gear 601 and the second gear 604 is adjusted, so that the first and second belts can restore the tensioned state.

[0027] Further, two adjusting plates 4 are arranged on the main shaft 2 and the auxiliary shaft 3 respectively, the main shaft 2 and the auxiliary shaft 3 pass through the two adjusting plates 4, the housing 1 is provided with a through hole matched with the adjusting plate 4 on the side, the adjusting plate 4 passes through the through hole, and one end of the adjusting plate 4 passing through the through hole is connected with the housing 1 through an adjusting screw, so as to adjust the length of the adjusting plate 4 passing through the through hole, thereby realizing the function of adjusting the gap between the main shaft and the auxiliary shaft.

[0028] Specifically, the two adjusting plates 4 on the main shaft 2 are located in the direction away from the auxiliary shaft 3, and the two adjusting plates 4 on the auxiliary shaft 3 are located in the direction away from the main shaft 2, the two adjusting plates 4 realize the supporting effect on the main shaft 2 and the auxiliary shaft 3, so that the rotation is more stable, the adjusting screw is threadedly connected with the adjusting plate 4 and is rotatably connected with the outer side of the housing 1, when the adjusting screw is rotated, the depth of the adjusting plate 4 inserted into the housing 1 can be adjusted, so as to change the distance between the main shaft and the auxiliary shaft.

[0029] The structure that one end of the adjusting plate 4 passes out of the housing 1 makes the adjusting plate 4 external, thereby further improving the convenience.

[0030] In addition, the end of the adjusting plate 4 passing through the shell 1 can be "T" shaped, and the two sides of the "T" shaped structure are respectively provided with adjusting screws, so that the structure is stable, and the connection is convenient. The adjusting plate 4 and the through hole are preferably provided with sealing parts such as sealing rings, sealing coatings, and sealing silica gel.

[0031] As Figures 1-2 , Figures 4-6 , the application also includes a sealing plate 7 for sealing:

[0032] The shell 1 is also provided with a sealing plate 7, which divides the shell 1 into two chambers, the connecting mechanism 6 is located in one of the chambers, and the first and second spiral sleeves are located in the other chamber. The main shaft 2 and the auxiliary shaft 3 both pass through the sealing plate 7, the first sliding plate 202 is sleeved on the main shaft 2, and the second sliding plate 302 is sleeved on the auxiliary shaft 3. The first sliding plate 202 and the second sliding plate 302 are both slidably connected to the sealing plate 7.

[0033] In Figure 1 , the first and second spiral sleeves are located in the left chamber, the connecting mechanism 6 is located in the right chamber, the sealing plate 7 achieves the sealing effect, avoids the contact between the material and the connecting mechanism 6, and the first and second sliding plates are used when adjusting the distance between the main shaft and the auxiliary shaft. They slide on the sealing plate 7 and seal.

[0034] Further, the sealing plate 7 is provided with a first hollow part 702 and a second hollow part 703, the inner walls of the first and second hollow parts are respectively provided with sealing grooves 701, the first sliding plate 202 is located in the first hollow part 702, and the second sliding plate 302 is located in the second hollow part 703. The circumferential surfaces of the first and second sliding plates are respectively slidably connected to the sealing grooves 701, the first sliding plate 202 and the second sliding plate 302 block the first and second hollow parts respectively, the main shaft 2 passes through and is fixedly connected to the first sliding plate 202, and the auxiliary shaft 3 passes through and is fixedly connected to the second sliding plate 302.

[0035] The first hollow portion 702 and the second hollow portion 703 are both square through-hole structures of the same size, and the sealing groove 701 is evenly arranged around the inner wall surface of the first and second hollow portions. The first slide 202 and the second slide 302 are the same size and are both square plate structures. The outer circumferences of the first slide 202 and the second slide 302 are respectively clamped in the sealing groove 701 of the first hollow portion 702 and the second hollow portion 703. Since the size of the first slide 202 and the second slide 302 are larger than the first and second hollow portions, the first slide 202 and the second slide 302 block the first and second hollow portions to form a sealing structure, and there is a gap between the outer circumferences of the first slide 202 and the second slide 302 and the sealing groove 701, so the first slide 202 and the second slide 302 can slide in the sealing groove 701, and the sliding direction is the horizontal radial direction of the primary and secondary axes, that is, Figure 4 In the left and right directions, when the first slide 202 and the second slide 302 slide in the sealing groove 701, it does not affect their complete covering of the first and second hollow parts. The advantage of this design is that the first slide 202 and the second slide 302 can be slightly moved to adapt to the spacing adjustment between the main and secondary shafts, and the structure of covering the first and second hollow parts can achieve a sealing function.

[0036] In addition, components such as a sealing coating, sealing silica gel, and a sealing ring may be provided in the sealing groove 701 to improve the sealing performance.

[0037] Furthermore, the opposite ends of the first hollow portion 702 and the second hollow portion 703 are connected, and the opposite ends of the first slide plate 202 and the second slide plate 302 are respectively provided with matching notches, and the notches of the two are symmetrically arranged and engaged with each other.

[0038] The opposite end of the first hollow portion 702 and the second hollow portion 703 is the middle portion of the sealing plate 7, which is hollowed out so that the first and second hollow portions are connected at this position. The connected structure can increase the relative movement range of the first and second slides.

[0039] In addition, the sealing plate 7 can be formed by stacking multiple plates, and the multiple plates can be fixedly connected or connected by screws to facilitate the installation of the first and second slides. A frame 704 is also fixedly set on the outer side of the sealing plate 7. The frame 704 is a square frame structure and is mounted on the sealing plate 7. The shell 1 is preferably designed as a split structure, that is, the two split shells are connected to each other by screws to form a shell. The position where the two split shells are connected presses the frame 704 and allows the screws to pass through the frame 704, thereby keeping the shell 1 and the sealing plate 7 fixed.

[0040] like Figure 1 、 Figure 2 and Figure 3 , the specific structure of the connecting mechanism 6 is described below:

[0041] Further, the first pulley 603 is sleeved on the main shaft 2, the second pulley 606 is sleeved on the auxiliary shaft 3, the first belt 602 is sleeved on the first pulley 603, the second belt 605 is sleeved on the second pulley 606, the first gear 601 and the second gear 604 are both in the structure of an I-beam, the tooth parts are arranged on the outer circumferential surfaces, and the first belt 602 and the second belt 605 are respectively sleeved in the groove bodies of the first gear and the second gear.

[0042] The first pulley 603 and the second pulley 606 are arranged at intervals, so as to provide a margin of the adjustment gap of the main shaft and the auxiliary shaft, the first belt and the second belt are preferably synchronous belts, the first pulley and the second pulley are preferably synchronous pulleys, the outer circumferential surfaces of the first gear 601 and the second gear 604 are provided with annular groove bodies, so that the first gear 601 and the second gear 604 form the structure of an I-beam, the first belt and the second belt are sleeved in the annular groove bodies, and corresponding tooth parts are arranged in the annular groove bodies, so as to realize the meshing with the belts, the outer circumferential surfaces of the first gear 601 and the second gear 604 are in contact with each other and are meshed, and the tooth parts of the two are arranged on the outer circumferential surfaces.

[0043] Through the transmission of the belts and the pulleys and the meshing of the first gear 601 and the second gear 604, when the main shaft 2 rotates, the auxiliary shaft 3 rotates synchronously, and the rotation directions of the main shaft and the auxiliary shaft are opposite.

[0044] The main shaft and the auxiliary shaft are connected through the belts, and the purpose is to conveniently adjust the tightness of the belts after the adjustment gap of the main shaft and the auxiliary shaft, so as to not affect the transmission of the main shaft and the auxiliary shaft.

[0045] Further, the first gear 601 and the second gear 604 are rotatably arranged on the adjustment support 5, the adjustment support 5 is connected to the shell 1 in a height-adjustable manner, so as to realize the purpose of tensioning the first belt and the second belt.

[0046] Specifically, after the adjustment gap of the main shaft and the auxiliary shaft, the distance between the two is shortened, at this time, the height of the adjustment support 5 can be adjusted, so as to move upward, so that the first belt and the second belt are kept in a tight state, so as to avoid affecting the transmission of the main shaft and the auxiliary shaft.

[0047] In addition, the adjustment support 5 and the first gear and the second gear are preferably arranged above the main shaft and the auxiliary shaft.

[0048] Further, the shell 1 is threadedly connected with a screw rod 501, and the screw rod 501 is rotatably connected with the adjustment support 5.

[0049] Specifically, the screw rods 501 can be arranged two, located at both sides of the adjusting support 5 and vertically distributed, and when adjusting, the two screw rods 501 need to be rotated simultaneously, the uniform rising of the adjusting support 5 can be maintained, and the movement of the adjusting support 5 caused by the mistaken touch of one of the screw rods 501 can be avoided, and the two sides of the adjusting support 5 can be slidably connected with the shell 1 through the slide rails.

[0050] The above-described embodiments are only used to describe the preferred modes of the present application, and are not used to limit the scope of the present application, and various modifications, variations, modifications and replacements of the technical solutions of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A twin-screw pump with a male and female screw, comprising a housing (1), wherein a main shaft (2) and a secondary shaft (3) are arranged in the housing (1), one end of the main shaft (2) passes through the housing (1) and is connected to a motor, the main shaft (2) is connected to the secondary shaft (3) via a connecting mechanism (6), and can drive the secondary shaft (3) to rotate, a first spiral sleeve (201) is arranged on the main shaft (2), and a second spiral sleeve (301) meshing with the first spiral sleeve (201) is arranged on the secondary shaft (3), characterized in that: The main shaft (2) and the secondary shaft (3) are respectively rotatably connected to an adjustment plate (4), and the adjustment plate (4) is slidably connected to the housing (1) for adjusting the gap between the first and second spiral sleeves. The connection mechanism (6) includes a first gear (601) and a second gear (604) that are engaged with each other. The first gear (601) is connected to the main shaft (2) via a first belt (602), and the second gear (604) is connected to the secondary shaft (3) via a second belt (605). The first and second gears are connected to the housing (1) in an adjustable height to tighten the first and second belts. One of the first spiral sleeve (201) and the second spiral sleeve (301) is made of a metal rigid material, and the other is made of a rubber flexible material.

2. A twin-screw pump with male and female screws according to claim 1, characterized in that: Two adjusting plates (4) are respectively provided on the main shaft (2) and the secondary shaft (3), and the main shaft (2) and the secondary shaft (3) pass through the two adjusting plates (4). A through hole adapted to the adjusting plate (4) is provided on the side of the housing (1), and the adjusting plate (4) passes through the through hole. One end of the adjusting plate (4) passing through the through hole is connected to the housing (1) via an adjusting screw for adjusting the length of the adjusting plate (4) passing through the through hole, thereby realizing the function of adjusting the gap between the main shaft and the secondary shaft.

3. The twin-screw pump with male and female screws according to claim 1, characterized in that: A sealing plate (7) is further provided in the housing (1), and the sealing plate (7) divides the housing (1) into two chambers. The connecting mechanism (6) is located in one of the chambers, and the first and second spiral sleeves are located in the other chamber. The main shaft (2) and the secondary shaft (3) both pass through the sealing plate (7). A first slide plate (202) is sleeved on the main shaft (2), and a second slide plate (302) is sleeved on the secondary shaft (3). Both the first slide plate (202) and the second slide plate (302) are slidably connected to the sealing plate (7).

4. A twin-screw pump with male and female screws according to claim 3, characterized in that: The sealing plate (7) is provided with a first hollow portion (702) and a second hollow portion (703), and the inner wall surfaces of the first and second hollow portions are respectively provided with sealing grooves (701), the first slide plate (202) is located in the first hollow portion (702), and the second slide plate (302) is located in the second hollow portion (703), and the peripheral surfaces of the first and second slide plates are respectively slidably engaged in the sealing grooves (701), the first slide plate (202) and the second slide plate (302) respectively block the first and second hollow portions, the main shaft (2) passes through and is fixedly connected to the first slide plate (202), and the secondary shaft (3) passes through and is fixedly connected to the second slide plate (302).

5. A twin-screw pump with male and female screws according to claim 4, characterized in that: The opposite ends of the first hollow portion (702) and the second hollow portion (703) are connected, and the opposite ends of the first slide plate (202) and the second slide plate (302) are respectively provided with matching notches, and the notches of the two are symmetrically arranged and mutually engaged.

6. The twin-screw pump with male and female screws according to claim 1, characterized in that: A first pulley (603) is sleeved on the main shaft (2), a second pulley (606) is sleeved on the secondary shaft (3), the first belt (602) is sleeved on the first pulley (603), the second belt (605) is sleeved on the second pulley (606), the first gear (601) and the second gear (604) are both I-shaped pulleys, the teeth of which are arranged on the outer circumference, and the first belt (602) and the second belt (605) are sleeved in the groove bodies of the first and second gears, respectively.

7. The twin-screw pump with male and female screws according to claim 1, characterized in that: The first gear (601) and the second gear (604) are rotatably arranged on an adjustment bracket (5), and the adjustment bracket (5) is connected to the housing (1) in an adjustable manner, thereby achieving the purpose of tensioning the first and second belts.

8. The twin-screw pump with male and female screws according to claim 7, characterized in that: The housing (1) is threadedly connected to a screw rod (501), and the screw rod (501) is rotatably connected to the adjustment bracket (5).

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