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1.3.11 Technical Requirements for Installation and Connection
The previous articles in this series discussed the Technical requirements for design and manufacturing of hydraulic cylinders-Barrel tube, Technical requirements for hydraulic cylinders-Piston and Piston rod, Cylinder head and cylinder bottom， Guide sleeves, Sealing devices, Buffer, Venting, Anti-loosening. Today this article will explain Technical requirements for Installation and Connection of hydraulic cylinder.
1.3.11.1 Identification Codes for Installation Dimensions and Mounting Types
The installation dimensions and mounting type codes of hydraulic cylinders shall comply with the provisions of standard “Hydraulic and Pneumatic Cylinder Mounting Dimensions and Mounting Type Codes”.
This standard specifies the marking methods and codes for the installation dimensions and mounting types of hydraulic and pneumatic cylinders. The standard mainly includes the following:
① Identification codes for installation dimensions, overall dimensions, accessory dimensions, and connection (oil) port dimensions.
② Identification codes for mounting types.
③ Identification codes for accessory types.
The identification codes for cylinder mounting types are shown in Table 1-36.
The identification codes for cylinder accessory types are shown in Table 1-37.
1.3.11.2 Mounting Types and Dimensions of Standard Hydraulic Cylinders
(1) Hydraulic Cylinders for Metallurgical Equipment
① Types and dimensions of hydraulic cylinders for metallurgical equipment (PN≤16MPa). In standard “Hydraulic Cylinders for Metallurgical Equipment (PN≤16MPa)” specifies the oil inlet and outlet ports, mounting types, and connection dimensions of the cylinders.
a. Foot-mounted (Type G) hydraulic cylinders for metallurgical equipment (PN≤16MPa) types and dimensions are shown in Figure 1-4 and Table 1-38, respectively.
b. Trunnion-mounted (Type B) hydraulic cylinders for metallurgical equipment (PN≤16MPa) types and dimensions are shown in Figure 1 and Table 1-39, respectively.
Table 1-36 Identification Codes for Cylinder Mounting Types
Note: B—Cylinder body; D—Double piston rod; E—Front or rear end cover; F—Detachable flange; M—Mounting; P—Eyelet; R—Threaded end; S—Foot mount; T—Trunnion; X—Double-ended bolt or extended connecting rod.
Table 1-37 Identification Codes for Cylinder Accessory Types
Note: Attachment A; other details are as described in the table, such as P2—piston rod with double eyelets, internal thread.
Table 1-38 Dimensions of foot-mounted (Type G) hydraulic cylinders for metallurgical equipment (PN ≤ 16 MPa) (mm)
Table 1-39 Dimensions of Intermediate Pivoting Type (Type B) Hydraulic Cylinders for Metallurgical Equipment (PN ≤ 16 MPa) (mm)
(2) Basic Parameters and Mounting Dimensions of Marine Double-Acting Hydraulic Cylinders
In standard “Basic Parameters and Mounting Dimensions of Marine Double-Acting Hydraulic Cylinders” specifies the inlet and outlet ports, mounting types, and connection dimensions of the cylinders.
① The cylinder’s inlet and outlet ports use two connection types: threaded and flanged. Their dimensions are shown in Figure 1-19 and Table 1-53, respectively.
The connecting dimensions of the piston rod end for 16MPa pressure are determined according to Table 1-54.
The connecting dimensions of the piston rod end for 25MPa pressure are determined according to Table 1-55.
The dimensions of the 16MPa double-eyelet connection with bushing are determined according to Table 1-56.
The dimensions of the 25MPa double-eyelet connection with bushing are determined according to Table 1-57.
④ Mounting type and connection dimensions of double-eyelet type with spherical plain bearing. The double-eyelet mounting type with spherical plain bearing is shown in Figure 1-22.
The dimensions of the 16MPa double-ear ring connection are determined according to Table 1-58.
The dimensions of the 25MPa double-ear ring connection are determined according to Table 1-59.
The spherical plain bearings with connecting lugs are selected according to the E series specified in standard “Spherical Plain Bearings – Radial Spherical Plain Bearings”.
⑤ Circular front flange mounting type and connecting dimensions. The circular front flange mounting type is shown in Figure 1-23.
The dimensions for the 16MPa circular front flange connection are determined according to Table 1-60.
The dimensions for the 25MPa circular front flange connection are determined according to Table 1-61.
⑥ Intermediate hinge shaft mounting type and connection dimensions. The intermediate hinge shaft mounting type is shown in Figure 1-24.
The mounting and connection dimensions for the intermediate hinge shaft at 16 MPa are determined according to Table 1-62.
The installation and connection dimensions of the intermediate hinge shaft for 25MPa are determined according to Table 1-63.
The mounting type of the front cover hinge is shown in Figure 1-25.
The mounting and connection dimensions for the front cover hinge shaft at 16 MPa are determined according to Table 1-64.
(3) Large Hydraulic Cylinders
Under a nominal pressure of 25 MPa, the inlet and outlet ports, mounting types, and connection dimensions of large hydraulic cylinders specified in standard “Large Hydraulic Cylinders” are shown in the following figures and tables.
① Table 1-65 shows the basic parameters, inlet and outlet port numbers, and connection dimensions of large hydraulic cylinders. The mounting type and dimensions of the front circular flange type (MF3 type) large hydraulic cylinder are shown in Figure 1-26 and Table 1-66, respectively.
Note: 1. The cylinder inner diameter code AL can be found in standard “Hydraulic Cylinder and Pneumatic Cylinder Mounting Dimensions and Mounting Type Codes”.
2. In standard “Hydraulic Cylinder and Pneumatic Cylinder Mounting Dimensions and Mounting Type Codes”, FF is specified as the code for flange port dimensions (general dimensions).
3. The mounting hole diameter FB in the table does not conform to the provisions of standard “Fasteners – Through Holes for Bolts and Screws”.
4. The piston rod thread length indicated in the figures of this standard below does not conform to the provisions of standard “Hydraulic and Pneumatic Systems and Components – Piston Rod Thread Types and Size Series”.
②The mounting type and dimensions of the rear end circular flange type (MF4 type) large hydraulic cylinder are shown in Figure 1-27 and Table 1-67, respectively.
③ The rear-end fixed single-earring type (MP3, MP5 type) large hydraulic cylinder mounting type and dimensions are shown in Figure 1-28 and Table 1-68, respectively.
The rear-end fixed single-earring type (MP3, MP5 type) spherical plain bearings are selected according to the H series specified in standard “Spherical Plain Bearings – Radial Spherical Plain Bearings”.
④ The intermediate fixed trunnion type (MT4 type) large hydraulic cylinder mounting type and dimensions are shown in Figure 1-29 and Table 1-69, respectively.
⑤ The flange installation diagram for the cylinder’s oil inlet and outlet ports is shown in Figure 1-30. The dimensions of the oil inlet and outlet ports for large hydraulic cylinders are shown in Table 1-70.
Technical requirements for hydraulic cylinder installation, adjustment of mounting position, and mounting fasteners can be found in Section 1.3.1.2 of this hydraulic cylinder engineering newsletters.
★★★Review of selected articles in our hydraulic cylinder engineering newsletters:
- Classification and Structure of Hydraulic Cylinders
- Hydraulic Cylinder Parameters and Parameter Calculation
- Hydraulic Cylinder Parameter Calculation Example
- Technical requirements for design and manufacturing of hydraulic cylinders-Barrel tube
- Technical requirements for Piston and Piston rod
- Technical requirements for Cylinder head and cylinder bottom
- Technical requirements for guide sleeves
- Technical requirements for sealing devices
- Technical Requirements for Buffer, Venting, Anti-loosening, and Other Devices
- Several Design Methods for Flow Regeneration Using Differential Circuits
- Design, calculation and processing points of hydraulic cylinders: recommended collection
- Piston rod that is too smooth or too rough will affect the sealing life of the hydraulic cylinder