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CN-122014756-A - Internal and external integrated bearing seat for three-screw pump

CN122014756ACN 122014756 ACN122014756 ACN 122014756ACN-122014756-A

Abstract

The invention discloses an inner and outer integrated bearing seat for a three-screw pump, which belongs to the technical field of bearing seats, wherein connecting flanges are fixedly connected to two ends of a bearing seat body, a plurality of connecting holes are formed in the connecting flanges, a bearing seat positioning hole, a first auxiliary shaft seal position, a first shaft seal position, a communication hole, a second shaft seal position, a second auxiliary shaft seal position and a bearing mounting hole are sequentially formed in the bearing seat body along the axial direction, the diameter of the bearing mounting hole is identical to that of the bearing seat positioning hole.

Inventors

  • LIU WEI
  • WANG YONGFU
  • WANG SHENG
  • ZENG YU
  • ZHAN WEIJIAN
  • SUN WEI

Assignees

  • 黄山工业泵制造有限公司

Dates

Publication Date
20260512
Application Date
20260318

Claims (10)

  1. 1. The utility model provides an inside and outside integral type bearing frame for three-screw pump which characterized in that includes bearing frame body (21) and flange (22), wherein: Connecting flanges (22) are fixedly connected to two ends of the bearing seat body (21), and a plurality of connecting holes are formed in the connecting flanges (22); Bearing frame body (21) has seted up bearing frame locating hole (201), first supplementary bearing position (202), first bearing position (203), intercommunicating pore (204), second bearing position (205), second supplementary bearing position (206) and bearing mounting hole (207) along the axial in proper order, the diameter d3 of first bearing position (203) all is greater than the diameter of intercommunicating pore (204) with the diameter d6 of second bearing position (205), the diameter d2 of first supplementary bearing position (202) is greater than the diameter d3 of first bearing position (203), the diameter d1 of bearing frame locating hole (201) is greater than the diameter d2 of first supplementary bearing position (202), the diameter d5 of second supplementary bearing position (206) is greater than the diameter d6 of second bearing position (205), the diameter d4 of bearing mounting hole (207) is greater than the diameter d5 of second supplementary bearing position (206), the diameter d4 of bearing mounting hole (207) is the same with the diameter d1 of bearing frame locating hole (201).
  2. 2. An internal and external integrated bearing housing for a three-screw pump according to claim 1, characterized in that the diameters of the two connecting flanges (22) are the same, namely d1=d2, and the diameters and positions of the connecting holes on the connecting flanges (22) are the same.
  3. 3. The internal and external integrated bearing seat for the three-screw pump according to claim 1, wherein a first oil discharging hole (210) and a second oil discharging hole (211) are formed in the bearing seat body (21), the first oil discharging hole (210) is connected to the first auxiliary shaft seal position (202) in a penetrating manner in the radial direction from the outer side wall of the bearing seat body (21), and the second oil discharging hole (211) is connected to the second auxiliary shaft seal position (206) in the penetrating manner in the radial direction from the outer side wall of the bearing seat body (21).
  4. 4. An internal and external integrated bearing seat for a three-screw pump according to claim 3, characterized in that a first oil return hole (212) and a second oil return hole (214) are formed in the bearing seat body (21), the first oil return hole (212) is connected to the first auxiliary shaft seal position (202) in a penetrating manner from the end face of one connecting flange (22) of the bearing body, the second oil return hole (214) is connected to the second auxiliary shaft seal position (206) in a penetrating manner from the end face of the other connecting flange (22) of the bearing body, a first oil return branch hole (213) and a second oil return branch hole (215) are formed in the side wall of the bearing seat body (21), and the first oil return branch hole (213) is connected to the first oil return hole (212) in a penetrating manner, and the second oil return branch hole (215) is connected to the second oil return hole (214) in a penetrating manner.
  5. 5. The internal and external integrated bearing housing for a three-screw pump according to claim 4, wherein the first oil discharge hole (210) and the second oil discharge hole (211) have the same specification, i.e., m5=m6.
  6. 6. The internal and external integrated bearing housing for a three-screw pump according to claim 5, wherein the first oil return hole (212) has the same specification as the second oil return hole (214), and the first oil return branch hole (213) has the same specification as the second oil return branch hole (215), that is, m1=m2, m3=m4.
  7. 7. The internal and external integrated bearing housing for a three-screw pump according to claim 6, wherein the first oil return hole (212) has the same specification as the first oil return branch hole (213), and the first oil discharge hole (210) has the same specification as the first oil return hole (212), that is, m1=m3, m3=m5.
  8. 8. The internal and external integrated bearing seat for the three-screw pump according to claim 1, wherein a first check ring groove (208) is formed in the inner side wall of the first auxiliary shaft seal position (202), a second check ring groove (209) is formed in the inner side wall of the bearing mounting hole (207), and the diameter d2 of the first auxiliary shaft seal position (202) is the same as the diameter d5 of the second auxiliary shaft seal position (206).
  9. 9. An internal and external integrated bearing housing for a three-screw pump according to claim 1, characterized in that the length L4 of the bearing mounting hole (207) is equal to the sum of the length L1 of the bearing housing positioning hole (201) and the bearing width B1, i.e. l4=l1+b1.
  10. 10. An internal and external integrated bearing housing for a three-screw pump according to claim 1, characterized in that the diameter d3 of the first shaft seal (203) is the same as the diameter d6 of the second shaft seal (205), and the length L3 of the first shaft seal (203) is the same as the length L6 of the second shaft seal (205), i.e. d3=d6, l3=l6.

Description

Internal and external integrated bearing seat for three-screw pump Technical Field The invention relates to the technical field of bearing seats, in particular to an internal and external integrated bearing seat for a three-screw pump. Background The three-screw pump is characterized by that it utilizes the rotation of screw rod to implement liquid suction and discharge, and utilizes the driving screw rod as middle screw rod, and utilizes the prime motor to drive rotation, and utilizes the driven screw rods as screws on both sides to make counter-rotation along with driving screw rod, and can continuously form sealed space in suction inlet, and can be transferred to discharge outlet, and can make the transferred liquid be step-by-step boosted so as to form a continuous, stable and axially-moving pressure liquid. The three-screw pump has wide application range, and the bearing seat is divided into two main types, i.e. an internal bearing seat and an external bearing seat, wherein for the internal bearing seat, the bearing is arranged at one end close to the conveying medium, a product sealing system consists of a front end cover, the internal bearing seat (containing an oil discharge screw plug), a sealing gland, an oil collecting cavity, an internal shaft seal and the like, and the bearing is directly lubricated by the conveying medium, so that the structure is simple, additional lubricating equipment is not needed, while for the external bearing seat, the bearing is arranged at one end far from the conveying medium, the sealing system consists of the front end cover, the external bearing seat (containing the oil discharge screw plug), an auxiliary seal, the external shaft seal and the like, and the bearing is not contacted with the conveying medium, so that the bearing is lubricated by lubricating grease. In the prior art, two bearing mounting modes adopt two sets of different component combinations, so that the number of related components is increased, but the internal and external mounting modes of the product bearing are determined according to the use conditions, and the use conditions are uncertain, so that the production and storage of related components are increased to meet the delivery requirements of the product, a large amount of funds and inventory are occupied, and challenges are presented to links such as planning, purchasing, production and storage of the components, in particular to production modes of multiple varieties and small batches; Therefore, in order to reduce the number of parts, an internal and external integrated bearing seat for a three-screw pump is proposed. Disclosure of Invention The invention aims to provide an internal and external integrated bearing seat for a three-screw pump, which solves the technical problems that in the prior art, two bearing installation modes adopt two sets of different part combinations, so that the number of related parts is excessive and the production and the storage are inconvenient. The aim of the invention can be achieved by the following technical scheme: The utility model provides an inside and outside integral type bearing frame for three-screw pump, includes bearing frame body and flange, wherein: Connecting flanges are fixedly connected to two ends of the bearing seat body, and a plurality of connecting holes are formed in the connecting flanges; The bearing seat body is provided with a bearing seat positioning hole, a first auxiliary shaft seal position, a first shaft seal position, a communication hole, a second shaft seal position, a second auxiliary shaft seal position and a bearing mounting hole in sequence along the axial direction, the diameter d3 of the first shaft seal position and the diameter d6 of the second shaft seal position are both larger than the diameter of the communication hole, the diameter d2 of the first auxiliary shaft seal position is larger than the diameter d3 of the first shaft seal position, the diameter d1 of the bearing seat positioning hole is larger than the diameter d2 of the first auxiliary shaft seal position, the diameter d5 of the second auxiliary shaft seal position is larger than the diameter d6 of the second shaft seal position, the diameter d4 of the bearing mounting hole is larger than the diameter d5 of the second auxiliary shaft seal position, and the diameter d4 of the bearing mounting hole is identical with the diameter d1 of the bearing seat positioning hole. Compared with the prior art, the internal and external integrated bearing seat for the three-screw pump has the following beneficial effects: The diameter of the bearing mounting hole is unified with the diameter of the bearing seat positioning hole, so that an internal bearing and an external bearing can be mounted in the bearing mounting hole and are matched with the end cover for positioning, the internal bearing and the external bearing can be used as two parts through the internal and external integrated bearing seat, the inte